Activity.java revision a4ceea026d6373e9be4b1daf3aa4ed93de4157cf
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.app; 18 19import static java.lang.Character.MIN_VALUE; 20 21import android.annotation.CallSuper; 22import android.annotation.DrawableRes; 23import android.annotation.IdRes; 24import android.annotation.IntDef; 25import android.annotation.LayoutRes; 26import android.annotation.MainThread; 27import android.annotation.NonNull; 28import android.annotation.Nullable; 29import android.annotation.RequiresPermission; 30import android.annotation.StyleRes; 31import android.annotation.SystemApi; 32import android.app.VoiceInteractor.Request; 33import android.app.admin.DevicePolicyManager; 34import android.app.assist.AssistContent; 35import android.content.ComponentCallbacks2; 36import android.content.ComponentName; 37import android.content.ContentResolver; 38import android.content.Context; 39import android.content.CursorLoader; 40import android.content.IIntentSender; 41import android.content.Intent; 42import android.content.IntentSender; 43import android.content.SharedPreferences; 44import android.content.pm.ActivityInfo; 45import android.content.pm.ApplicationInfo; 46import android.content.pm.PackageManager; 47import android.content.pm.PackageManager.NameNotFoundException; 48import android.content.res.Configuration; 49import android.content.res.Resources; 50import android.content.res.TypedArray; 51import android.database.Cursor; 52import android.graphics.Bitmap; 53import android.graphics.Canvas; 54import android.graphics.Color; 55import android.graphics.Rect; 56import android.graphics.drawable.Drawable; 57import android.media.AudioManager; 58import android.media.session.MediaController; 59import android.net.Uri; 60import android.os.BadParcelableException; 61import android.os.Build; 62import android.os.Bundle; 63import android.os.Handler; 64import android.os.IBinder; 65import android.os.Looper; 66import android.os.Parcelable; 67import android.os.PersistableBundle; 68import android.os.RemoteException; 69import android.os.ServiceManager.ServiceNotFoundException; 70import android.os.StrictMode; 71import android.os.SystemProperties; 72import android.os.UserHandle; 73import android.text.Selection; 74import android.text.SpannableStringBuilder; 75import android.text.TextUtils; 76import android.text.method.TextKeyListener; 77import android.transition.Scene; 78import android.transition.TransitionManager; 79import android.util.ArrayMap; 80import android.util.AttributeSet; 81import android.util.EventLog; 82import android.util.Log; 83import android.util.PrintWriterPrinter; 84import android.util.Slog; 85import android.util.SparseArray; 86import android.util.SuperNotCalledException; 87import android.view.ActionMode; 88import android.view.ContextMenu; 89import android.view.ContextMenu.ContextMenuInfo; 90import android.view.ContextThemeWrapper; 91import android.view.DragAndDropPermissions; 92import android.view.DragEvent; 93import android.view.KeyEvent; 94import android.view.KeyboardShortcutGroup; 95import android.view.KeyboardShortcutInfo; 96import android.view.LayoutInflater; 97import android.view.Menu; 98import android.view.MenuInflater; 99import android.view.MenuItem; 100import android.view.MotionEvent; 101import android.view.SearchEvent; 102import android.view.View; 103import android.view.View.OnCreateContextMenuListener; 104import android.view.ViewGroup; 105import android.view.ViewGroup.LayoutParams; 106import android.view.ViewManager; 107import android.view.ViewRootImpl; 108import android.view.ViewRootImpl.ActivityConfigCallback; 109import android.view.Window; 110import android.view.Window.WindowControllerCallback; 111import android.view.WindowManager; 112import android.view.WindowManagerGlobal; 113import android.view.accessibility.AccessibilityEvent; 114import android.view.autofill.AutofillManager; 115import android.view.autofill.AutofillPopupWindow; 116import android.view.autofill.IAutofillWindowPresenter; 117import android.widget.AdapterView; 118import android.widget.Toast; 119import android.widget.Toolbar; 120 121import com.android.internal.annotations.GuardedBy; 122import com.android.internal.app.IVoiceInteractor; 123import com.android.internal.app.ToolbarActionBar; 124import com.android.internal.app.WindowDecorActionBar; 125import com.android.internal.policy.DecorView; 126import com.android.internal.policy.PhoneWindow; 127 128import java.io.FileDescriptor; 129import java.io.PrintWriter; 130import java.lang.annotation.Retention; 131import java.lang.annotation.RetentionPolicy; 132import java.util.ArrayList; 133import java.util.HashMap; 134import java.util.List; 135 136/** 137 * An activity is a single, focused thing that the user can do. Almost all 138 * activities interact with the user, so the Activity class takes care of 139 * creating a window for you in which you can place your UI with 140 * {@link #setContentView}. While activities are often presented to the user 141 * as full-screen windows, they can also be used in other ways: as floating 142 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 143 * or embedded inside of another activity (using {@link ActivityGroup}). 144 * 145 * There are two methods almost all subclasses of Activity will implement: 146 * 147 * <ul> 148 * <li> {@link #onCreate} is where you initialize your activity. Most 149 * importantly, here you will usually call {@link #setContentView(int)} 150 * with a layout resource defining your UI, and using {@link #findViewById} 151 * to retrieve the widgets in that UI that you need to interact with 152 * programmatically. 153 * 154 * <li> {@link #onPause} is where you deal with the user leaving your 155 * activity. Most importantly, any changes made by the user should at this 156 * point be committed (usually to the 157 * {@link android.content.ContentProvider} holding the data). 158 * </ul> 159 * 160 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 161 * activity classes must have a corresponding 162 * {@link android.R.styleable#AndroidManifestActivity <activity>} 163 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 164 * 165 * <p>Topics covered here: 166 * <ol> 167 * <li><a href="#Fragments">Fragments</a> 168 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 169 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 170 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 171 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 172 * <li><a href="#Permissions">Permissions</a> 173 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 174 * </ol> 175 * 176 * <div class="special reference"> 177 * <h3>Developer Guides</h3> 178 * <p>The Activity class is an important part of an application's overall lifecycle, 179 * and the way activities are launched and put together is a fundamental 180 * part of the platform's application model. For a detailed perspective on the structure of an 181 * Android application and how activities behave, please read the 182 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 183 * <a href="{@docRoot}guide/components/tasks-and-back-stack.html">Tasks and Back Stack</a> 184 * developer guides.</p> 185 * 186 * <p>You can also find a detailed discussion about how to create activities in the 187 * <a href="{@docRoot}guide/components/activities.html">Activities</a> 188 * developer guide.</p> 189 * </div> 190 * 191 * <a name="Fragments"></a> 192 * <h3>Fragments</h3> 193 * 194 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 195 * implementations can make use of the {@link Fragment} class to better 196 * modularize their code, build more sophisticated user interfaces for larger 197 * screens, and help scale their application between small and large screens. 198 * 199 * <a name="ActivityLifecycle"></a> 200 * <h3>Activity Lifecycle</h3> 201 * 202 * <p>Activities in the system are managed as an <em>activity stack</em>. 203 * When a new activity is started, it is placed on the top of the stack 204 * and becomes the running activity -- the previous activity always remains 205 * below it in the stack, and will not come to the foreground again until 206 * the new activity exits.</p> 207 * 208 * <p>An activity has essentially four states:</p> 209 * <ul> 210 * <li> If an activity is in the foreground of the screen (at the top of 211 * the stack), 212 * it is <em>active</em> or <em>running</em>. </li> 213 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 214 * or transparent activity has focus on top of your activity), it 215 * is <em>paused</em>. A paused activity is completely alive (it 216 * maintains all state and member information and remains attached to 217 * the window manager), but can be killed by the system in extreme 218 * low memory situations. 219 * <li>If an activity is completely obscured by another activity, 220 * it is <em>stopped</em>. It still retains all state and member information, 221 * however, it is no longer visible to the user so its window is hidden 222 * and it will often be killed by the system when memory is needed 223 * elsewhere.</li> 224 * <li>If an activity is paused or stopped, the system can drop the activity 225 * from memory by either asking it to finish, or simply killing its 226 * process. When it is displayed again to the user, it must be 227 * completely restarted and restored to its previous state.</li> 228 * </ul> 229 * 230 * <p>The following diagram shows the important state paths of an Activity. 231 * The square rectangles represent callback methods you can implement to 232 * perform operations when the Activity moves between states. The colored 233 * ovals are major states the Activity can be in.</p> 234 * 235 * <p><img src="../../../images/activity_lifecycle.png" 236 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 237 * 238 * <p>There are three key loops you may be interested in monitoring within your 239 * activity: 240 * 241 * <ul> 242 * <li>The <b>entire lifetime</b> of an activity happens between the first call 243 * to {@link android.app.Activity#onCreate} through to a single final call 244 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 245 * of "global" state in onCreate(), and release all remaining resources in 246 * onDestroy(). For example, if it has a thread running in the background 247 * to download data from the network, it may create that thread in onCreate() 248 * and then stop the thread in onDestroy(). 249 * 250 * <li>The <b>visible lifetime</b> of an activity happens between a call to 251 * {@link android.app.Activity#onStart} until a corresponding call to 252 * {@link android.app.Activity#onStop}. During this time the user can see the 253 * activity on-screen, though it may not be in the foreground and interacting 254 * with the user. Between these two methods you can maintain resources that 255 * are needed to show the activity to the user. For example, you can register 256 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 257 * that impact your UI, and unregister it in onStop() when the user no 258 * longer sees what you are displaying. The onStart() and onStop() methods 259 * can be called multiple times, as the activity becomes visible and hidden 260 * to the user. 261 * 262 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 263 * {@link android.app.Activity#onResume} until a corresponding call to 264 * {@link android.app.Activity#onPause}. During this time the activity is 265 * in front of all other activities and interacting with the user. An activity 266 * can frequently go between the resumed and paused states -- for example when 267 * the device goes to sleep, when an activity result is delivered, when a new 268 * intent is delivered -- so the code in these methods should be fairly 269 * lightweight. 270 * </ul> 271 * 272 * <p>The entire lifecycle of an activity is defined by the following 273 * Activity methods. All of these are hooks that you can override 274 * to do appropriate work when the activity changes state. All 275 * activities will implement {@link android.app.Activity#onCreate} 276 * to do their initial setup; many will also implement 277 * {@link android.app.Activity#onPause} to commit changes to data and 278 * otherwise prepare to stop interacting with the user. You should always 279 * call up to your superclass when implementing these methods.</p> 280 * 281 * </p> 282 * <pre class="prettyprint"> 283 * public class Activity extends ApplicationContext { 284 * protected void onCreate(Bundle savedInstanceState); 285 * 286 * protected void onStart(); 287 * 288 * protected void onRestart(); 289 * 290 * protected void onResume(); 291 * 292 * protected void onPause(); 293 * 294 * protected void onStop(); 295 * 296 * protected void onDestroy(); 297 * } 298 * </pre> 299 * 300 * <p>In general the movement through an activity's lifecycle looks like 301 * this:</p> 302 * 303 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 304 * <colgroup align="left" span="3" /> 305 * <colgroup align="left" /> 306 * <colgroup align="center" /> 307 * <colgroup align="center" /> 308 * 309 * <thead> 310 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 311 * </thead> 312 * 313 * <tbody> 314 * <tr><td colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</td> 315 * <td>Called when the activity is first created. 316 * This is where you should do all of your normal static set up: 317 * create views, bind data to lists, etc. This method also 318 * provides you with a Bundle containing the activity's previously 319 * frozen state, if there was one. 320 * <p>Always followed by <code>onStart()</code>.</td> 321 * <td align="center">No</td> 322 * <td align="center"><code>onStart()</code></td> 323 * </tr> 324 * 325 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 326 * <td colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</td> 327 * <td>Called after your activity has been stopped, prior to it being 328 * started again. 329 * <p>Always followed by <code>onStart()</code></td> 330 * <td align="center">No</td> 331 * <td align="center"><code>onStart()</code></td> 332 * </tr> 333 * 334 * <tr><td colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</td> 335 * <td>Called when the activity is becoming visible to the user. 336 * <p>Followed by <code>onResume()</code> if the activity comes 337 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 338 * <td align="center">No</td> 339 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 340 * </tr> 341 * 342 * <tr><td rowspan="2" style="border-left: none;"> </td> 343 * <td align="left" border="0">{@link android.app.Activity#onResume onResume()}</td> 344 * <td>Called when the activity will start 345 * interacting with the user. At this point your activity is at 346 * the top of the activity stack, with user input going to it. 347 * <p>Always followed by <code>onPause()</code>.</td> 348 * <td align="center">No</td> 349 * <td align="center"><code>onPause()</code></td> 350 * </tr> 351 * 352 * <tr><td align="left" border="0">{@link android.app.Activity#onPause onPause()}</td> 353 * <td>Called when the system is about to start resuming a previous 354 * activity. This is typically used to commit unsaved changes to 355 * persistent data, stop animations and other things that may be consuming 356 * CPU, etc. Implementations of this method must be very quick because 357 * the next activity will not be resumed until this method returns. 358 * <p>Followed by either <code>onResume()</code> if the activity 359 * returns back to the front, or <code>onStop()</code> if it becomes 360 * invisible to the user.</td> 361 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 362 * <td align="center"><code>onResume()</code> or<br> 363 * <code>onStop()</code></td> 364 * </tr> 365 * 366 * <tr><td colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</td> 367 * <td>Called when the activity is no longer visible to the user, because 368 * another activity has been resumed and is covering this one. This 369 * may happen either because a new activity is being started, an existing 370 * one is being brought in front of this one, or this one is being 371 * destroyed. 372 * <p>Followed by either <code>onRestart()</code> if 373 * this activity is coming back to interact with the user, or 374 * <code>onDestroy()</code> if this activity is going away.</td> 375 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 376 * <td align="center"><code>onRestart()</code> or<br> 377 * <code>onDestroy()</code></td> 378 * </tr> 379 * 380 * <tr><td colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</td> 381 * <td>The final call you receive before your 382 * activity is destroyed. This can happen either because the 383 * activity is finishing (someone called {@link Activity#finish} on 384 * it, or because the system is temporarily destroying this 385 * instance of the activity to save space. You can distinguish 386 * between these two scenarios with the {@link 387 * Activity#isFinishing} method.</td> 388 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 389 * <td align="center"><em>nothing</em></td> 390 * </tr> 391 * </tbody> 392 * </table> 393 * 394 * <p>Note the "Killable" column in the above table -- for those methods that 395 * are marked as being killable, after that method returns the process hosting the 396 * activity may be killed by the system <em>at any time</em> without another line 397 * of its code being executed. Because of this, you should use the 398 * {@link #onPause} method to write any persistent data (such as user edits) 399 * to storage. In addition, the method 400 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 401 * in such a background state, allowing you to save away any dynamic instance 402 * state in your activity into the given Bundle, to be later received in 403 * {@link #onCreate} if the activity needs to be re-created. 404 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 405 * section for more information on how the lifecycle of a process is tied 406 * to the activities it is hosting. Note that it is important to save 407 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 408 * because the latter is not part of the lifecycle callbacks, so will not 409 * be called in every situation as described in its documentation.</p> 410 * 411 * <p class="note">Be aware that these semantics will change slightly between 412 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 413 * vs. those targeting prior platforms. Starting with Honeycomb, an application 414 * is not in the killable state until its {@link #onStop} has returned. This 415 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 416 * safely called after {@link #onPause()} and allows and application to safely 417 * wait until {@link #onStop()} to save persistent state.</p> 418 * 419 * <p>For those methods that are not marked as being killable, the activity's 420 * process will not be killed by the system starting from the time the method 421 * is called and continuing after it returns. Thus an activity is in the killable 422 * state, for example, between after <code>onPause()</code> to the start of 423 * <code>onResume()</code>.</p> 424 * 425 * <a name="ConfigurationChanges"></a> 426 * <h3>Configuration Changes</h3> 427 * 428 * <p>If the configuration of the device (as defined by the 429 * {@link Configuration Resources.Configuration} class) changes, 430 * then anything displaying a user interface will need to update to match that 431 * configuration. Because Activity is the primary mechanism for interacting 432 * with the user, it includes special support for handling configuration 433 * changes.</p> 434 * 435 * <p>Unless you specify otherwise, a configuration change (such as a change 436 * in screen orientation, language, input devices, etc) will cause your 437 * current activity to be <em>destroyed</em>, going through the normal activity 438 * lifecycle process of {@link #onPause}, 439 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 440 * had been in the foreground or visible to the user, once {@link #onDestroy} is 441 * called in that instance then a new instance of the activity will be 442 * created, with whatever savedInstanceState the previous instance had generated 443 * from {@link #onSaveInstanceState}.</p> 444 * 445 * <p>This is done because any application resource, 446 * including layout files, can change based on any configuration value. Thus 447 * the only safe way to handle a configuration change is to re-retrieve all 448 * resources, including layouts, drawables, and strings. Because activities 449 * must already know how to save their state and re-create themselves from 450 * that state, this is a convenient way to have an activity restart itself 451 * with a new configuration.</p> 452 * 453 * <p>In some special cases, you may want to bypass restarting of your 454 * activity based on one or more types of configuration changes. This is 455 * done with the {@link android.R.attr#configChanges android:configChanges} 456 * attribute in its manifest. For any types of configuration changes you say 457 * that you handle there, you will receive a call to your current activity's 458 * {@link #onConfigurationChanged} method instead of being restarted. If 459 * a configuration change involves any that you do not handle, however, the 460 * activity will still be restarted and {@link #onConfigurationChanged} 461 * will not be called.</p> 462 * 463 * <a name="StartingActivities"></a> 464 * <h3>Starting Activities and Getting Results</h3> 465 * 466 * <p>The {@link android.app.Activity#startActivity} 467 * method is used to start a 468 * new activity, which will be placed at the top of the activity stack. It 469 * takes a single argument, an {@link android.content.Intent Intent}, 470 * which describes the activity 471 * to be executed.</p> 472 * 473 * <p>Sometimes you want to get a result back from an activity when it 474 * ends. For example, you may start an activity that lets the user pick 475 * a person in a list of contacts; when it ends, it returns the person 476 * that was selected. To do this, you call the 477 * {@link android.app.Activity#startActivityForResult(Intent, int)} 478 * version with a second integer parameter identifying the call. The result 479 * will come back through your {@link android.app.Activity#onActivityResult} 480 * method.</p> 481 * 482 * <p>When an activity exits, it can call 483 * {@link android.app.Activity#setResult(int)} 484 * to return data back to its parent. It must always supply a result code, 485 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 486 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 487 * return back an Intent containing any additional data it wants. All of this 488 * information appears back on the 489 * parent's <code>Activity.onActivityResult()</code>, along with the integer 490 * identifier it originally supplied.</p> 491 * 492 * <p>If a child activity fails for any reason (such as crashing), the parent 493 * activity will receive a result with the code RESULT_CANCELED.</p> 494 * 495 * <pre class="prettyprint"> 496 * public class MyActivity extends Activity { 497 * ... 498 * 499 * static final int PICK_CONTACT_REQUEST = 0; 500 * 501 * public boolean onKeyDown(int keyCode, KeyEvent event) { 502 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 503 * // When the user center presses, let them pick a contact. 504 * startActivityForResult( 505 * new Intent(Intent.ACTION_PICK, 506 * new Uri("content://contacts")), 507 * PICK_CONTACT_REQUEST); 508 * return true; 509 * } 510 * return false; 511 * } 512 * 513 * protected void onActivityResult(int requestCode, int resultCode, 514 * Intent data) { 515 * if (requestCode == PICK_CONTACT_REQUEST) { 516 * if (resultCode == RESULT_OK) { 517 * // A contact was picked. Here we will just display it 518 * // to the user. 519 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 520 * } 521 * } 522 * } 523 * } 524 * </pre> 525 * 526 * <a name="SavingPersistentState"></a> 527 * <h3>Saving Persistent State</h3> 528 * 529 * <p>There are generally two kinds of persistent state than an activity 530 * will deal with: shared document-like data (typically stored in a SQLite 531 * database using a {@linkplain android.content.ContentProvider content provider}) 532 * and internal state such as user preferences.</p> 533 * 534 * <p>For content provider data, we suggest that activities use a 535 * "edit in place" user model. That is, any edits a user makes are effectively 536 * made immediately without requiring an additional confirmation step. 537 * Supporting this model is generally a simple matter of following two rules:</p> 538 * 539 * <ul> 540 * <li> <p>When creating a new document, the backing database entry or file for 541 * it is created immediately. For example, if the user chooses to write 542 * a new e-mail, a new entry for that e-mail is created as soon as they 543 * start entering data, so that if they go to any other activity after 544 * that point this e-mail will now appear in the list of drafts.</p> 545 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 546 * commit to the backing content provider or file any changes the user 547 * has made. This ensures that those changes will be seen by any other 548 * activity that is about to run. You will probably want to commit 549 * your data even more aggressively at key times during your 550 * activity's lifecycle: for example before starting a new 551 * activity, before finishing your own activity, when the user 552 * switches between input fields, etc.</p> 553 * </ul> 554 * 555 * <p>This model is designed to prevent data loss when a user is navigating 556 * between activities, and allows the system to safely kill an activity (because 557 * system resources are needed somewhere else) at any time after it has been 558 * paused. Note this implies 559 * that the user pressing BACK from your activity does <em>not</em> 560 * mean "cancel" -- it means to leave the activity with its current contents 561 * saved away. Canceling edits in an activity must be provided through 562 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 563 * 564 * <p>See the {@linkplain android.content.ContentProvider content package} for 565 * more information about content providers. These are a key aspect of how 566 * different activities invoke and propagate data between themselves.</p> 567 * 568 * <p>The Activity class also provides an API for managing internal persistent state 569 * associated with an activity. This can be used, for example, to remember 570 * the user's preferred initial display in a calendar (day view or week view) 571 * or the user's default home page in a web browser.</p> 572 * 573 * <p>Activity persistent state is managed 574 * with the method {@link #getPreferences}, 575 * allowing you to retrieve and 576 * modify a set of name/value pairs associated with the activity. To use 577 * preferences that are shared across multiple application components 578 * (activities, receivers, services, providers), you can use the underlying 579 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 580 * to retrieve a preferences 581 * object stored under a specific name. 582 * (Note that it is not possible to share settings data across application 583 * packages -- for that you will need a content provider.)</p> 584 * 585 * <p>Here is an excerpt from a calendar activity that stores the user's 586 * preferred view mode in its persistent settings:</p> 587 * 588 * <pre class="prettyprint"> 589 * public class CalendarActivity extends Activity { 590 * ... 591 * 592 * static final int DAY_VIEW_MODE = 0; 593 * static final int WEEK_VIEW_MODE = 1; 594 * 595 * private SharedPreferences mPrefs; 596 * private int mCurViewMode; 597 * 598 * protected void onCreate(Bundle savedInstanceState) { 599 * super.onCreate(savedInstanceState); 600 * 601 * SharedPreferences mPrefs = getSharedPreferences(); 602 * mCurViewMode = mPrefs.getInt("view_mode", DAY_VIEW_MODE); 603 * } 604 * 605 * protected void onPause() { 606 * super.onPause(); 607 * 608 * SharedPreferences.Editor ed = mPrefs.edit(); 609 * ed.putInt("view_mode", mCurViewMode); 610 * ed.commit(); 611 * } 612 * } 613 * </pre> 614 * 615 * <a name="Permissions"></a> 616 * <h3>Permissions</h3> 617 * 618 * <p>The ability to start a particular Activity can be enforced when it is 619 * declared in its 620 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 621 * tag. By doing so, other applications will need to declare a corresponding 622 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 623 * element in their own manifest to be able to start that activity. 624 * 625 * <p>When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 626 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 627 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the 628 * Activity access to the specific URIs in the Intent. Access will remain 629 * until the Activity has finished (it will remain across the hosting 630 * process being killed and other temporary destruction). As of 631 * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity 632 * was already created and a new Intent is being delivered to 633 * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added 634 * to the existing ones it holds. 635 * 636 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 637 * document for more information on permissions and security in general. 638 * 639 * <a name="ProcessLifecycle"></a> 640 * <h3>Process Lifecycle</h3> 641 * 642 * <p>The Android system attempts to keep application process around for as 643 * long as possible, but eventually will need to remove old processes when 644 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 645 * Lifecycle</a>, the decision about which process to remove is intimately 646 * tied to the state of the user's interaction with it. In general, there 647 * are four states a process can be in based on the activities running in it, 648 * listed here in order of importance. The system will kill less important 649 * processes (the last ones) before it resorts to killing more important 650 * processes (the first ones). 651 * 652 * <ol> 653 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 654 * that the user is currently interacting with) is considered the most important. 655 * Its process will only be killed as a last resort, if it uses more memory 656 * than is available on the device. Generally at this point the device has 657 * reached a memory paging state, so this is required in order to keep the user 658 * interface responsive. 659 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 660 * but not in the foreground, such as one sitting behind a foreground dialog) 661 * is considered extremely important and will not be killed unless that is 662 * required to keep the foreground activity running. 663 * <li> <p>A <b>background activity</b> (an activity that is not visible to 664 * the user and has been paused) is no longer critical, so the system may 665 * safely kill its process to reclaim memory for other foreground or 666 * visible processes. If its process needs to be killed, when the user navigates 667 * back to the activity (making it visible on the screen again), its 668 * {@link #onCreate} method will be called with the savedInstanceState it had previously 669 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 670 * state as the user last left it. 671 * <li> <p>An <b>empty process</b> is one hosting no activities or other 672 * application components (such as {@link Service} or 673 * {@link android.content.BroadcastReceiver} classes). These are killed very 674 * quickly by the system as memory becomes low. For this reason, any 675 * background operation you do outside of an activity must be executed in the 676 * context of an activity BroadcastReceiver or Service to ensure that the system 677 * knows it needs to keep your process around. 678 * </ol> 679 * 680 * <p>Sometimes an Activity may need to do a long-running operation that exists 681 * independently of the activity lifecycle itself. An example may be a camera 682 * application that allows you to upload a picture to a web site. The upload 683 * may take a long time, and the application should allow the user to leave 684 * the application while it is executing. To accomplish this, your Activity 685 * should start a {@link Service} in which the upload takes place. This allows 686 * the system to properly prioritize your process (considering it to be more 687 * important than other non-visible applications) for the duration of the 688 * upload, independent of whether the original activity is paused, stopped, 689 * or finished. 690 */ 691public class Activity extends ContextThemeWrapper 692 implements LayoutInflater.Factory2, 693 Window.Callback, KeyEvent.Callback, 694 OnCreateContextMenuListener, ComponentCallbacks2, 695 Window.OnWindowDismissedCallback, WindowControllerCallback, 696 AutofillManager.AutofillClient { 697 private static final String TAG = "Activity"; 698 private static final boolean DEBUG_LIFECYCLE = false; 699 700 /** Standard activity result: operation canceled. */ 701 public static final int RESULT_CANCELED = 0; 702 /** Standard activity result: operation succeeded. */ 703 public static final int RESULT_OK = -1; 704 /** Start of user-defined activity results. */ 705 public static final int RESULT_FIRST_USER = 1; 706 707 /** @hide Task isn't finished when activity is finished */ 708 public static final int DONT_FINISH_TASK_WITH_ACTIVITY = 0; 709 /** 710 * @hide Task is finished if the finishing activity is the root of the task. To preserve the 711 * past behavior the task is also removed from recents. 712 */ 713 public static final int FINISH_TASK_WITH_ROOT_ACTIVITY = 1; 714 /** 715 * @hide Task is finished along with the finishing activity, but it is not removed from 716 * recents. 717 */ 718 public static final int FINISH_TASK_WITH_ACTIVITY = 2; 719 720 static final String FRAGMENTS_TAG = "android:fragments"; 721 private static final String LAST_AUTOFILL_ID = "android:lastAutofillId"; 722 723 private static final String AUTOFILL_RESET_NEEDED = "@android:autofillResetNeeded"; 724 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 725 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 726 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 727 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 728 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 729 private static final String HAS_CURENT_PERMISSIONS_REQUEST_KEY = 730 "android:hasCurrentPermissionsRequest"; 731 732 private static final String REQUEST_PERMISSIONS_WHO_PREFIX = "@android:requestPermissions:"; 733 private static final String AUTO_FILL_AUTH_WHO_PREFIX = "@android:autoFillAuth:"; 734 735 private static final String KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME = "com.android.systemui"; 736 737 private static class ManagedDialog { 738 Dialog mDialog; 739 Bundle mArgs; 740 } 741 private SparseArray<ManagedDialog> mManagedDialogs; 742 743 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 744 private Instrumentation mInstrumentation; 745 private IBinder mToken; 746 private int mIdent; 747 /*package*/ String mEmbeddedID; 748 private Application mApplication; 749 /*package*/ Intent mIntent; 750 /*package*/ String mReferrer; 751 private ComponentName mComponent; 752 /*package*/ ActivityInfo mActivityInfo; 753 /*package*/ ActivityThread mMainThread; 754 Activity mParent; 755 boolean mCalled; 756 /*package*/ boolean mResumed; 757 /*package*/ boolean mStopped; 758 boolean mFinished; 759 boolean mStartedActivity; 760 private boolean mDestroyed; 761 private boolean mDoReportFullyDrawn = true; 762 /** true if the activity is going through a transient pause */ 763 /*package*/ boolean mTemporaryPause = false; 764 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 765 /*package*/ boolean mChangingConfigurations = false; 766 /*package*/ int mConfigChangeFlags; 767 /*package*/ Configuration mCurrentConfig; 768 private SearchManager mSearchManager; 769 private MenuInflater mMenuInflater; 770 771 /** The autofill manager. Always access via {@link #getAutofillManager()}. */ 772 @Nullable private AutofillManager mAutofillManager; 773 774 static final class NonConfigurationInstances { 775 Object activity; 776 HashMap<String, Object> children; 777 FragmentManagerNonConfig fragments; 778 ArrayMap<String, LoaderManager> loaders; 779 VoiceInteractor voiceInteractor; 780 } 781 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 782 783 private Window mWindow; 784 785 private WindowManager mWindowManager; 786 /*package*/ View mDecor = null; 787 /*package*/ boolean mWindowAdded = false; 788 /*package*/ boolean mVisibleFromServer = false; 789 /*package*/ boolean mVisibleFromClient = true; 790 /*package*/ ActionBar mActionBar = null; 791 private boolean mEnableDefaultActionBarUp; 792 793 private VoiceInteractor mVoiceInteractor; 794 795 private CharSequence mTitle; 796 private int mTitleColor = 0; 797 798 // we must have a handler before the FragmentController is constructed 799 final Handler mHandler = new Handler(); 800 final FragmentController mFragments = FragmentController.createController(new HostCallbacks()); 801 802 // Most recent call to requestVisibleBehind(). 803 @Deprecated 804 boolean mVisibleBehind; 805 806 private static final class ManagedCursor { 807 ManagedCursor(Cursor cursor) { 808 mCursor = cursor; 809 mReleased = false; 810 mUpdated = false; 811 } 812 813 private final Cursor mCursor; 814 private boolean mReleased; 815 private boolean mUpdated; 816 } 817 818 @GuardedBy("mManagedCursors") 819 private final ArrayList<ManagedCursor> mManagedCursors = new ArrayList<>(); 820 821 @GuardedBy("this") 822 int mResultCode = RESULT_CANCELED; 823 @GuardedBy("this") 824 Intent mResultData = null; 825 826 private TranslucentConversionListener mTranslucentCallback; 827 private boolean mChangeCanvasToTranslucent; 828 829 private SearchEvent mSearchEvent; 830 831 private boolean mTitleReady = false; 832 private int mActionModeTypeStarting = ActionMode.TYPE_PRIMARY; 833 834 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 835 private SpannableStringBuilder mDefaultKeySsb = null; 836 837 private ActivityManager.TaskDescription mTaskDescription = 838 new ActivityManager.TaskDescription(); 839 840 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 841 842 @SuppressWarnings("unused") 843 private final Object mInstanceTracker = StrictMode.trackActivity(this); 844 845 private Thread mUiThread; 846 847 ActivityTransitionState mActivityTransitionState = new ActivityTransitionState(); 848 SharedElementCallback mEnterTransitionListener = SharedElementCallback.NULL_CALLBACK; 849 SharedElementCallback mExitTransitionListener = SharedElementCallback.NULL_CALLBACK; 850 851 private boolean mHasCurrentPermissionsRequest; 852 853 private boolean mAutoFillResetNeeded; 854 855 /** The last autofill id that was returned from {@link #getNextAutofillId()} */ 856 private int mLastAutofillId = View.LAST_APP_AUTOFILL_ID; 857 858 private AutofillPopupWindow mAutofillPopupWindow; 859 860 private static native String getDlWarning(); 861 862 /** Return the intent that started this activity. */ 863 public Intent getIntent() { 864 return mIntent; 865 } 866 867 /** 868 * Change the intent returned by {@link #getIntent}. This holds a 869 * reference to the given intent; it does not copy it. Often used in 870 * conjunction with {@link #onNewIntent}. 871 * 872 * @param newIntent The new Intent object to return from getIntent 873 * 874 * @see #getIntent 875 * @see #onNewIntent 876 */ 877 public void setIntent(Intent newIntent) { 878 mIntent = newIntent; 879 } 880 881 /** Return the application that owns this activity. */ 882 public final Application getApplication() { 883 return mApplication; 884 } 885 886 /** Is this activity embedded inside of another activity? */ 887 public final boolean isChild() { 888 return mParent != null; 889 } 890 891 /** Return the parent activity if this view is an embedded child. */ 892 public final Activity getParent() { 893 return mParent; 894 } 895 896 /** Retrieve the window manager for showing custom windows. */ 897 public WindowManager getWindowManager() { 898 return mWindowManager; 899 } 900 901 /** 902 * Retrieve the current {@link android.view.Window} for the activity. 903 * This can be used to directly access parts of the Window API that 904 * are not available through Activity/Screen. 905 * 906 * @return Window The current window, or null if the activity is not 907 * visual. 908 */ 909 public Window getWindow() { 910 return mWindow; 911 } 912 913 /** 914 * Return the LoaderManager for this activity, creating it if needed. 915 */ 916 public LoaderManager getLoaderManager() { 917 return mFragments.getLoaderManager(); 918 } 919 920 /** 921 * Calls {@link android.view.Window#getCurrentFocus} on the 922 * Window of this Activity to return the currently focused view. 923 * 924 * @return View The current View with focus or null. 925 * 926 * @see #getWindow 927 * @see android.view.Window#getCurrentFocus 928 */ 929 @Nullable 930 public View getCurrentFocus() { 931 return mWindow != null ? mWindow.getCurrentFocus() : null; 932 } 933 934 /** 935 * (Create and) return the autofill manager 936 * 937 * @return The autofill manager 938 */ 939 @NonNull private AutofillManager getAutofillManager() { 940 if (mAutofillManager == null) { 941 mAutofillManager = getSystemService(AutofillManager.class); 942 } 943 944 return mAutofillManager; 945 } 946 947 /** 948 * Called when the activity is starting. This is where most initialization 949 * should go: calling {@link #setContentView(int)} to inflate the 950 * activity's UI, using {@link #findViewById} to programmatically interact 951 * with widgets in the UI, calling 952 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 953 * cursors for data being displayed, etc. 954 * 955 * <p>You can call {@link #finish} from within this function, in 956 * which case onDestroy() will be immediately called without any of the rest 957 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 958 * {@link #onPause}, etc) executing. 959 * 960 * <p><em>Derived classes must call through to the super class's 961 * implementation of this method. If they do not, an exception will be 962 * thrown.</em></p> 963 * 964 * @param savedInstanceState If the activity is being re-initialized after 965 * previously being shut down then this Bundle contains the data it most 966 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 967 * 968 * @see #onStart 969 * @see #onSaveInstanceState 970 * @see #onRestoreInstanceState 971 * @see #onPostCreate 972 */ 973 @MainThread 974 @CallSuper 975 protected void onCreate(@Nullable Bundle savedInstanceState) { 976 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState); 977 if (mLastNonConfigurationInstances != null) { 978 mFragments.restoreLoaderNonConfig(mLastNonConfigurationInstances.loaders); 979 } 980 if (mActivityInfo.parentActivityName != null) { 981 if (mActionBar == null) { 982 mEnableDefaultActionBarUp = true; 983 } else { 984 mActionBar.setDefaultDisplayHomeAsUpEnabled(true); 985 } 986 } 987 if (savedInstanceState != null) { 988 mAutoFillResetNeeded = savedInstanceState.getBoolean(AUTOFILL_RESET_NEEDED, false); 989 mLastAutofillId = savedInstanceState.getInt(LAST_AUTOFILL_ID, 990 View.LAST_APP_AUTOFILL_ID); 991 992 if (mAutoFillResetNeeded) { 993 getAutofillManager().onCreate(savedInstanceState); 994 } 995 996 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 997 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 998 ? mLastNonConfigurationInstances.fragments : null); 999 } 1000 mFragments.dispatchCreate(); 1001 getApplication().dispatchActivityCreated(this, savedInstanceState); 1002 if (mVoiceInteractor != null) { 1003 mVoiceInteractor.attachActivity(this); 1004 } 1005 mCalled = true; 1006 } 1007 1008 /** 1009 * Same as {@link #onCreate(android.os.Bundle)} but called for those activities created with 1010 * the attribute {@link android.R.attr#persistableMode} set to 1011 * <code>persistAcrossReboots</code>. 1012 * 1013 * @param savedInstanceState if the activity is being re-initialized after 1014 * previously being shut down then this Bundle contains the data it most 1015 * recently supplied in {@link #onSaveInstanceState}. 1016 * <b><i>Note: Otherwise it is null.</i></b> 1017 * @param persistentState if the activity is being re-initialized after 1018 * previously being shut down or powered off then this Bundle contains the data it most 1019 * recently supplied to outPersistentState in {@link #onSaveInstanceState}. 1020 * <b><i>Note: Otherwise it is null.</i></b> 1021 * 1022 * @see #onCreate(android.os.Bundle) 1023 * @see #onStart 1024 * @see #onSaveInstanceState 1025 * @see #onRestoreInstanceState 1026 * @see #onPostCreate 1027 */ 1028 public void onCreate(@Nullable Bundle savedInstanceState, 1029 @Nullable PersistableBundle persistentState) { 1030 onCreate(savedInstanceState); 1031 } 1032 1033 /** 1034 * The hook for {@link ActivityThread} to restore the state of this activity. 1035 * 1036 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 1037 * {@link #restoreManagedDialogs(android.os.Bundle)}. 1038 * 1039 * @param savedInstanceState contains the saved state 1040 */ 1041 final void performRestoreInstanceState(Bundle savedInstanceState) { 1042 onRestoreInstanceState(savedInstanceState); 1043 restoreManagedDialogs(savedInstanceState); 1044 } 1045 1046 /** 1047 * The hook for {@link ActivityThread} to restore the state of this activity. 1048 * 1049 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 1050 * {@link #restoreManagedDialogs(android.os.Bundle)}. 1051 * 1052 * @param savedInstanceState contains the saved state 1053 * @param persistentState contains the persistable saved state 1054 */ 1055 final void performRestoreInstanceState(Bundle savedInstanceState, 1056 PersistableBundle persistentState) { 1057 onRestoreInstanceState(savedInstanceState, persistentState); 1058 if (savedInstanceState != null) { 1059 restoreManagedDialogs(savedInstanceState); 1060 } 1061 } 1062 1063 /** 1064 * This method is called after {@link #onStart} when the activity is 1065 * being re-initialized from a previously saved state, given here in 1066 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 1067 * to restore their state, but it is sometimes convenient to do it here 1068 * after all of the initialization has been done or to allow subclasses to 1069 * decide whether to use your default implementation. The default 1070 * implementation of this method performs a restore of any view state that 1071 * had previously been frozen by {@link #onSaveInstanceState}. 1072 * 1073 * <p>This method is called between {@link #onStart} and 1074 * {@link #onPostCreate}. 1075 * 1076 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1077 * 1078 * @see #onCreate 1079 * @see #onPostCreate 1080 * @see #onResume 1081 * @see #onSaveInstanceState 1082 */ 1083 protected void onRestoreInstanceState(Bundle savedInstanceState) { 1084 if (mWindow != null) { 1085 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 1086 if (windowState != null) { 1087 mWindow.restoreHierarchyState(windowState); 1088 } 1089 } 1090 } 1091 1092 /** 1093 * This is the same as {@link #onRestoreInstanceState(Bundle)} but is called for activities 1094 * created with the attribute {@link android.R.attr#persistableMode} set to 1095 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1096 * came from the restored PersistableBundle first 1097 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1098 * 1099 * <p>This method is called between {@link #onStart} and 1100 * {@link #onPostCreate}. 1101 * 1102 * <p>If this method is called {@link #onRestoreInstanceState(Bundle)} will not be called. 1103 * 1104 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1105 * @param persistentState the data most recently supplied in {@link #onSaveInstanceState}. 1106 * 1107 * @see #onRestoreInstanceState(Bundle) 1108 * @see #onCreate 1109 * @see #onPostCreate 1110 * @see #onResume 1111 * @see #onSaveInstanceState 1112 */ 1113 public void onRestoreInstanceState(Bundle savedInstanceState, 1114 PersistableBundle persistentState) { 1115 if (savedInstanceState != null) { 1116 onRestoreInstanceState(savedInstanceState); 1117 } 1118 } 1119 1120 /** 1121 * Restore the state of any saved managed dialogs. 1122 * 1123 * @param savedInstanceState The bundle to restore from. 1124 */ 1125 private void restoreManagedDialogs(Bundle savedInstanceState) { 1126 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 1127 if (b == null) { 1128 return; 1129 } 1130 1131 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 1132 final int numDialogs = ids.length; 1133 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 1134 for (int i = 0; i < numDialogs; i++) { 1135 final Integer dialogId = ids[i]; 1136 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 1137 if (dialogState != null) { 1138 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 1139 // so tell createDialog() not to do it, otherwise we get an exception 1140 final ManagedDialog md = new ManagedDialog(); 1141 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 1142 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 1143 if (md.mDialog != null) { 1144 mManagedDialogs.put(dialogId, md); 1145 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 1146 md.mDialog.onRestoreInstanceState(dialogState); 1147 } 1148 } 1149 } 1150 } 1151 1152 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 1153 final Dialog dialog = onCreateDialog(dialogId, args); 1154 if (dialog == null) { 1155 return null; 1156 } 1157 dialog.dispatchOnCreate(state); 1158 return dialog; 1159 } 1160 1161 private static String savedDialogKeyFor(int key) { 1162 return SAVED_DIALOG_KEY_PREFIX + key; 1163 } 1164 1165 private static String savedDialogArgsKeyFor(int key) { 1166 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 1167 } 1168 1169 /** 1170 * Called when activity start-up is complete (after {@link #onStart} 1171 * and {@link #onRestoreInstanceState} have been called). Applications will 1172 * generally not implement this method; it is intended for system 1173 * classes to do final initialization after application code has run. 1174 * 1175 * <p><em>Derived classes must call through to the super class's 1176 * implementation of this method. If they do not, an exception will be 1177 * thrown.</em></p> 1178 * 1179 * @param savedInstanceState If the activity is being re-initialized after 1180 * previously being shut down then this Bundle contains the data it most 1181 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1182 * @see #onCreate 1183 */ 1184 @CallSuper 1185 protected void onPostCreate(@Nullable Bundle savedInstanceState) { 1186 if (!isChild()) { 1187 mTitleReady = true; 1188 onTitleChanged(getTitle(), getTitleColor()); 1189 } 1190 1191 mCalled = true; 1192 } 1193 1194 /** 1195 * This is the same as {@link #onPostCreate(Bundle)} but is called for activities 1196 * created with the attribute {@link android.R.attr#persistableMode} set to 1197 * <code>persistAcrossReboots</code>. 1198 * 1199 * @param savedInstanceState The data most recently supplied in {@link #onSaveInstanceState} 1200 * @param persistentState The data caming from the PersistableBundle first 1201 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1202 * 1203 * @see #onCreate 1204 */ 1205 public void onPostCreate(@Nullable Bundle savedInstanceState, 1206 @Nullable PersistableBundle persistentState) { 1207 onPostCreate(savedInstanceState); 1208 } 1209 1210 /** 1211 * Called after {@link #onCreate} — or after {@link #onRestart} when 1212 * the activity had been stopped, but is now again being displayed to the 1213 * user. It will be followed by {@link #onResume}. 1214 * 1215 * <p><em>Derived classes must call through to the super class's 1216 * implementation of this method. If they do not, an exception will be 1217 * thrown.</em></p> 1218 * 1219 * @see #onCreate 1220 * @see #onStop 1221 * @see #onResume 1222 */ 1223 @CallSuper 1224 protected void onStart() { 1225 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStart " + this); 1226 mCalled = true; 1227 1228 mFragments.doLoaderStart(); 1229 1230 getApplication().dispatchActivityStarted(this); 1231 1232 if (mAutoFillResetNeeded) { 1233 AutofillManager afm = getAutofillManager(); 1234 if (afm != null) { 1235 afm.onVisibleForAutofill(); 1236 } 1237 } 1238 } 1239 1240 /** 1241 * Called after {@link #onStop} when the current activity is being 1242 * re-displayed to the user (the user has navigated back to it). It will 1243 * be followed by {@link #onStart} and then {@link #onResume}. 1244 * 1245 * <p>For activities that are using raw {@link Cursor} objects (instead of 1246 * creating them through 1247 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1248 * this is usually the place 1249 * where the cursor should be requeried (because you had deactivated it in 1250 * {@link #onStop}. 1251 * 1252 * <p><em>Derived classes must call through to the super class's 1253 * implementation of this method. If they do not, an exception will be 1254 * thrown.</em></p> 1255 * 1256 * @see #onStop 1257 * @see #onStart 1258 * @see #onResume 1259 */ 1260 @CallSuper 1261 protected void onRestart() { 1262 mCalled = true; 1263 } 1264 1265 /** 1266 * Called when an {@link #onResume} is coming up, prior to other pre-resume callbacks 1267 * such as {@link #onNewIntent} and {@link #onActivityResult}. This is primarily intended 1268 * to give the activity a hint that its state is no longer saved -- it will generally 1269 * be called after {@link #onSaveInstanceState} and prior to the activity being 1270 * resumed/started again. 1271 */ 1272 public void onStateNotSaved() { 1273 } 1274 1275 /** 1276 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1277 * {@link #onPause}, for your activity to start interacting with the user. 1278 * This is a good place to begin animations, open exclusive-access devices 1279 * (such as the camera), etc. 1280 * 1281 * <p>Keep in mind that onResume is not the best indicator that your activity 1282 * is visible to the user; a system window such as the keyguard may be in 1283 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1284 * activity is visible to the user (for example, to resume a game). 1285 * 1286 * <p><em>Derived classes must call through to the super class's 1287 * implementation of this method. If they do not, an exception will be 1288 * thrown.</em></p> 1289 * 1290 * @see #onRestoreInstanceState 1291 * @see #onRestart 1292 * @see #onPostResume 1293 * @see #onPause 1294 */ 1295 @CallSuper 1296 protected void onResume() { 1297 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this); 1298 getApplication().dispatchActivityResumed(this); 1299 mActivityTransitionState.onResume(this, isTopOfTask()); 1300 mCalled = true; 1301 } 1302 1303 /** 1304 * Called when activity resume is complete (after {@link #onResume} has 1305 * been called). Applications will generally not implement this method; 1306 * it is intended for system classes to do final setup after application 1307 * resume code has run. 1308 * 1309 * <p><em>Derived classes must call through to the super class's 1310 * implementation of this method. If they do not, an exception will be 1311 * thrown.</em></p> 1312 * 1313 * @see #onResume 1314 */ 1315 @CallSuper 1316 protected void onPostResume() { 1317 final Window win = getWindow(); 1318 if (win != null) win.makeActive(); 1319 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1320 mCalled = true; 1321 } 1322 1323 void setVoiceInteractor(IVoiceInteractor voiceInteractor) { 1324 if (mVoiceInteractor != null) { 1325 for (Request activeRequest: mVoiceInteractor.getActiveRequests()) { 1326 activeRequest.cancel(); 1327 activeRequest.clear(); 1328 } 1329 } 1330 if (voiceInteractor == null) { 1331 mVoiceInteractor = null; 1332 } else { 1333 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 1334 Looper.myLooper()); 1335 } 1336 } 1337 1338 /** 1339 * Gets the next autofill ID. 1340 * 1341 * <p>All IDs will be bigger than {@link View#LAST_APP_AUTOFILL_ID}. All IDs returned 1342 * will be unique. 1343 * 1344 * @return A ID that is unique in the activity 1345 * 1346 * {@hide} 1347 */ 1348 public int getNextAutofillId() { 1349 if (mLastAutofillId == Integer.MAX_VALUE - 1) { 1350 mLastAutofillId = View.LAST_APP_AUTOFILL_ID; 1351 } 1352 1353 mLastAutofillId++; 1354 1355 return mLastAutofillId; 1356 } 1357 1358 /** 1359 * Check whether this activity is running as part of a voice interaction with the user. 1360 * If true, it should perform its interaction with the user through the 1361 * {@link VoiceInteractor} returned by {@link #getVoiceInteractor}. 1362 */ 1363 public boolean isVoiceInteraction() { 1364 return mVoiceInteractor != null; 1365 } 1366 1367 /** 1368 * Like {@link #isVoiceInteraction}, but only returns true if this is also the root 1369 * of a voice interaction. That is, returns true if this activity was directly 1370 * started by the voice interaction service as the initiation of a voice interaction. 1371 * Otherwise, for example if it was started by another activity while under voice 1372 * interaction, returns false. 1373 */ 1374 public boolean isVoiceInteractionRoot() { 1375 try { 1376 return mVoiceInteractor != null 1377 && ActivityManager.getService().isRootVoiceInteraction(mToken); 1378 } catch (RemoteException e) { 1379 } 1380 return false; 1381 } 1382 1383 /** 1384 * Retrieve the active {@link VoiceInteractor} that the user is going through to 1385 * interact with this activity. 1386 */ 1387 public VoiceInteractor getVoiceInteractor() { 1388 return mVoiceInteractor; 1389 } 1390 1391 /** 1392 * Queries whether the currently enabled voice interaction service supports returning 1393 * a voice interactor for use by the activity. This is valid only for the duration of the 1394 * activity. 1395 * 1396 * @return whether the current voice interaction service supports local voice interaction 1397 */ 1398 public boolean isLocalVoiceInteractionSupported() { 1399 try { 1400 return ActivityManager.getService().supportsLocalVoiceInteraction(); 1401 } catch (RemoteException re) { 1402 } 1403 return false; 1404 } 1405 1406 /** 1407 * Starts a local voice interaction session. When ready, 1408 * {@link #onLocalVoiceInteractionStarted()} is called. You can pass a bundle of private options 1409 * to the registered voice interaction service. 1410 * @param privateOptions a Bundle of private arguments to the current voice interaction service 1411 */ 1412 public void startLocalVoiceInteraction(Bundle privateOptions) { 1413 try { 1414 ActivityManager.getService().startLocalVoiceInteraction(mToken, privateOptions); 1415 } catch (RemoteException re) { 1416 } 1417 } 1418 1419 /** 1420 * Callback to indicate that {@link #startLocalVoiceInteraction(Bundle)} has resulted in a 1421 * voice interaction session being started. You can now retrieve a voice interactor using 1422 * {@link #getVoiceInteractor()}. 1423 */ 1424 public void onLocalVoiceInteractionStarted() { 1425 } 1426 1427 /** 1428 * Callback to indicate that the local voice interaction has stopped either 1429 * because it was requested through a call to {@link #stopLocalVoiceInteraction()} 1430 * or because it was canceled by the user. The previously acquired {@link VoiceInteractor} 1431 * is no longer valid after this. 1432 */ 1433 public void onLocalVoiceInteractionStopped() { 1434 } 1435 1436 /** 1437 * Request to terminate the current voice interaction that was previously started 1438 * using {@link #startLocalVoiceInteraction(Bundle)}. When the interaction is 1439 * terminated, {@link #onLocalVoiceInteractionStopped()} will be called. 1440 */ 1441 public void stopLocalVoiceInteraction() { 1442 try { 1443 ActivityManager.getService().stopLocalVoiceInteraction(mToken); 1444 } catch (RemoteException re) { 1445 } 1446 } 1447 1448 /** 1449 * This is called for activities that set launchMode to "singleTop" in 1450 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1451 * flag when calling {@link #startActivity}. In either case, when the 1452 * activity is re-launched while at the top of the activity stack instead 1453 * of a new instance of the activity being started, onNewIntent() will be 1454 * called on the existing instance with the Intent that was used to 1455 * re-launch it. 1456 * 1457 * <p>An activity will always be paused before receiving a new intent, so 1458 * you can count on {@link #onResume} being called after this method. 1459 * 1460 * <p>Note that {@link #getIntent} still returns the original Intent. You 1461 * can use {@link #setIntent} to update it to this new Intent. 1462 * 1463 * @param intent The new intent that was started for the activity. 1464 * 1465 * @see #getIntent 1466 * @see #setIntent 1467 * @see #onResume 1468 */ 1469 protected void onNewIntent(Intent intent) { 1470 } 1471 1472 /** 1473 * The hook for {@link ActivityThread} to save the state of this activity. 1474 * 1475 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1476 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1477 * 1478 * @param outState The bundle to save the state to. 1479 */ 1480 final void performSaveInstanceState(Bundle outState) { 1481 onSaveInstanceState(outState); 1482 saveManagedDialogs(outState); 1483 mActivityTransitionState.saveState(outState); 1484 storeHasCurrentPermissionRequest(outState); 1485 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState); 1486 } 1487 1488 /** 1489 * The hook for {@link ActivityThread} to save the state of this activity. 1490 * 1491 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1492 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1493 * 1494 * @param outState The bundle to save the state to. 1495 * @param outPersistentState The bundle to save persistent state to. 1496 */ 1497 final void performSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1498 onSaveInstanceState(outState, outPersistentState); 1499 saveManagedDialogs(outState); 1500 storeHasCurrentPermissionRequest(outState); 1501 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState + 1502 ", " + outPersistentState); 1503 } 1504 1505 /** 1506 * Called to retrieve per-instance state from an activity before being killed 1507 * so that the state can be restored in {@link #onCreate} or 1508 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1509 * will be passed to both). 1510 * 1511 * <p>This method is called before an activity may be killed so that when it 1512 * comes back some time in the future it can restore its state. For example, 1513 * if activity B is launched in front of activity A, and at some point activity 1514 * A is killed to reclaim resources, activity A will have a chance to save the 1515 * current state of its user interface via this method so that when the user 1516 * returns to activity A, the state of the user interface can be restored 1517 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1518 * 1519 * <p>Do not confuse this method with activity lifecycle callbacks such as 1520 * {@link #onPause}, which is always called when an activity is being placed 1521 * in the background or on its way to destruction, or {@link #onStop} which 1522 * is called before destruction. One example of when {@link #onPause} and 1523 * {@link #onStop} is called and not this method is when a user navigates back 1524 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1525 * on B because that particular instance will never be restored, so the 1526 * system avoids calling it. An example when {@link #onPause} is called and 1527 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1528 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1529 * killed during the lifetime of B since the state of the user interface of 1530 * A will stay intact. 1531 * 1532 * <p>The default implementation takes care of most of the UI per-instance 1533 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1534 * view in the hierarchy that has an id, and by saving the id of the currently 1535 * focused view (all of which is restored by the default implementation of 1536 * {@link #onRestoreInstanceState}). If you override this method to save additional 1537 * information not captured by each individual view, you will likely want to 1538 * call through to the default implementation, otherwise be prepared to save 1539 * all of the state of each view yourself. 1540 * 1541 * <p>If called, this method will occur before {@link #onStop}. There are 1542 * no guarantees about whether it will occur before or after {@link #onPause}. 1543 * 1544 * @param outState Bundle in which to place your saved state. 1545 * 1546 * @see #onCreate 1547 * @see #onRestoreInstanceState 1548 * @see #onPause 1549 */ 1550 protected void onSaveInstanceState(Bundle outState) { 1551 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1552 1553 outState.putInt(LAST_AUTOFILL_ID, mLastAutofillId); 1554 Parcelable p = mFragments.saveAllState(); 1555 if (p != null) { 1556 outState.putParcelable(FRAGMENTS_TAG, p); 1557 } 1558 if (mAutoFillResetNeeded) { 1559 outState.putBoolean(AUTOFILL_RESET_NEEDED, true); 1560 getAutofillManager().onSaveInstanceState(outState); 1561 } 1562 getApplication().dispatchActivitySaveInstanceState(this, outState); 1563 } 1564 1565 /** 1566 * This is the same as {@link #onSaveInstanceState} but is called for activities 1567 * created with the attribute {@link android.R.attr#persistableMode} set to 1568 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1569 * in will be saved and presented in {@link #onCreate(Bundle, PersistableBundle)} 1570 * the first time that this activity is restarted following the next device reboot. 1571 * 1572 * @param outState Bundle in which to place your saved state. 1573 * @param outPersistentState State which will be saved across reboots. 1574 * 1575 * @see #onSaveInstanceState(Bundle) 1576 * @see #onCreate 1577 * @see #onRestoreInstanceState(Bundle, PersistableBundle) 1578 * @see #onPause 1579 */ 1580 public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1581 onSaveInstanceState(outState); 1582 } 1583 1584 /** 1585 * Save the state of any managed dialogs. 1586 * 1587 * @param outState place to store the saved state. 1588 */ 1589 private void saveManagedDialogs(Bundle outState) { 1590 if (mManagedDialogs == null) { 1591 return; 1592 } 1593 1594 final int numDialogs = mManagedDialogs.size(); 1595 if (numDialogs == 0) { 1596 return; 1597 } 1598 1599 Bundle dialogState = new Bundle(); 1600 1601 int[] ids = new int[mManagedDialogs.size()]; 1602 1603 // save each dialog's bundle, gather the ids 1604 for (int i = 0; i < numDialogs; i++) { 1605 final int key = mManagedDialogs.keyAt(i); 1606 ids[i] = key; 1607 final ManagedDialog md = mManagedDialogs.valueAt(i); 1608 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1609 if (md.mArgs != null) { 1610 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1611 } 1612 } 1613 1614 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1615 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1616 } 1617 1618 1619 /** 1620 * Called as part of the activity lifecycle when an activity is going into 1621 * the background, but has not (yet) been killed. The counterpart to 1622 * {@link #onResume}. 1623 * 1624 * <p>When activity B is launched in front of activity A, this callback will 1625 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1626 * so be sure to not do anything lengthy here. 1627 * 1628 * <p>This callback is mostly used for saving any persistent state the 1629 * activity is editing, to present a "edit in place" model to the user and 1630 * making sure nothing is lost if there are not enough resources to start 1631 * the new activity without first killing this one. This is also a good 1632 * place to do things like stop animations and other things that consume a 1633 * noticeable amount of CPU in order to make the switch to the next activity 1634 * as fast as possible, or to close resources that are exclusive access 1635 * such as the camera. 1636 * 1637 * <p>In situations where the system needs more memory it may kill paused 1638 * processes to reclaim resources. Because of this, you should be sure 1639 * that all of your state is saved by the time you return from 1640 * this function. In general {@link #onSaveInstanceState} is used to save 1641 * per-instance state in the activity and this method is used to store 1642 * global persistent data (in content providers, files, etc.) 1643 * 1644 * <p>After receiving this call you will usually receive a following call 1645 * to {@link #onStop} (after the next activity has been resumed and 1646 * displayed), however in some cases there will be a direct call back to 1647 * {@link #onResume} without going through the stopped state. 1648 * 1649 * <p><em>Derived classes must call through to the super class's 1650 * implementation of this method. If they do not, an exception will be 1651 * thrown.</em></p> 1652 * 1653 * @see #onResume 1654 * @see #onSaveInstanceState 1655 * @see #onStop 1656 */ 1657 @CallSuper 1658 protected void onPause() { 1659 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this); 1660 getApplication().dispatchActivityPaused(this); 1661 mCalled = true; 1662 } 1663 1664 /** 1665 * Called as part of the activity lifecycle when an activity is about to go 1666 * into the background as the result of user choice. For example, when the 1667 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1668 * when an incoming phone call causes the in-call Activity to be automatically 1669 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1670 * the activity being interrupted. In cases when it is invoked, this method 1671 * is called right before the activity's {@link #onPause} callback. 1672 * 1673 * <p>This callback and {@link #onUserInteraction} are intended to help 1674 * activities manage status bar notifications intelligently; specifically, 1675 * for helping activities determine the proper time to cancel a notfication. 1676 * 1677 * @see #onUserInteraction() 1678 */ 1679 protected void onUserLeaveHint() { 1680 } 1681 1682 /** 1683 * Generate a new thumbnail for this activity. This method is called before 1684 * pausing the activity, and should draw into <var>outBitmap</var> the 1685 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1686 * can use the given <var>canvas</var>, which is configured to draw into the 1687 * bitmap, for rendering if desired. 1688 * 1689 * <p>The default implementation returns fails and does not draw a thumbnail; 1690 * this will result in the platform creating its own thumbnail if needed. 1691 * 1692 * @param outBitmap The bitmap to contain the thumbnail. 1693 * @param canvas Can be used to render into the bitmap. 1694 * 1695 * @return Return true if you have drawn into the bitmap; otherwise after 1696 * you return it will be filled with a default thumbnail. 1697 * 1698 * @see #onCreateDescription 1699 * @see #onSaveInstanceState 1700 * @see #onPause 1701 */ 1702 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1703 return false; 1704 } 1705 1706 /** 1707 * Generate a new description for this activity. This method is called 1708 * before pausing the activity and can, if desired, return some textual 1709 * description of its current state to be displayed to the user. 1710 * 1711 * <p>The default implementation returns null, which will cause you to 1712 * inherit the description from the previous activity. If all activities 1713 * return null, generally the label of the top activity will be used as the 1714 * description. 1715 * 1716 * @return A description of what the user is doing. It should be short and 1717 * sweet (only a few words). 1718 * 1719 * @see #onCreateThumbnail 1720 * @see #onSaveInstanceState 1721 * @see #onPause 1722 */ 1723 @Nullable 1724 public CharSequence onCreateDescription() { 1725 return null; 1726 } 1727 1728 /** 1729 * This is called when the user is requesting an assist, to build a full 1730 * {@link Intent#ACTION_ASSIST} Intent with all of the context of the current 1731 * application. You can override this method to place into the bundle anything 1732 * you would like to appear in the {@link Intent#EXTRA_ASSIST_CONTEXT} part 1733 * of the assist Intent. 1734 * 1735 * <p>This function will be called after any global assist callbacks that had 1736 * been registered with {@link Application#registerOnProvideAssistDataListener 1737 * Application.registerOnProvideAssistDataListener}. 1738 */ 1739 public void onProvideAssistData(Bundle data) { 1740 } 1741 1742 /** 1743 * This is called when the user is requesting an assist, to provide references 1744 * to content related to the current activity. Before being called, the 1745 * {@code outContent} Intent is filled with the base Intent of the activity (the Intent 1746 * returned by {@link #getIntent()}). The Intent's extras are stripped of any types 1747 * that are not valid for {@link PersistableBundle} or non-framework Parcelables, and 1748 * the flags {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION} and 1749 * {@link Intent#FLAG_GRANT_PERSISTABLE_URI_PERMISSION} are cleared from the Intent. 1750 * 1751 * <p>Custom implementation may adjust the content intent to better reflect the top-level 1752 * context of the activity, and fill in its ClipData with additional content of 1753 * interest that the user is currently viewing. For example, an image gallery application 1754 * that has launched in to an activity allowing the user to swipe through pictures should 1755 * modify the intent to reference the current image they are looking it; such an 1756 * application when showing a list of pictures should add a ClipData that has 1757 * references to all of the pictures currently visible on screen.</p> 1758 * 1759 * @param outContent The assist content to return. 1760 */ 1761 public void onProvideAssistContent(AssistContent outContent) { 1762 } 1763 1764 /** 1765 * Request the Keyboard Shortcuts screen to show up. This will trigger 1766 * {@link #onProvideKeyboardShortcuts} to retrieve the shortcuts for the foreground activity. 1767 */ 1768 public final void requestShowKeyboardShortcuts() { 1769 Intent intent = new Intent(Intent.ACTION_SHOW_KEYBOARD_SHORTCUTS); 1770 intent.setPackage(KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME); 1771 sendBroadcastAsUser(intent, UserHandle.SYSTEM); 1772 } 1773 1774 /** 1775 * Dismiss the Keyboard Shortcuts screen. 1776 */ 1777 public final void dismissKeyboardShortcutsHelper() { 1778 Intent intent = new Intent(Intent.ACTION_DISMISS_KEYBOARD_SHORTCUTS); 1779 intent.setPackage(KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME); 1780 sendBroadcastAsUser(intent, UserHandle.SYSTEM); 1781 } 1782 1783 @Override 1784 public void onProvideKeyboardShortcuts( 1785 List<KeyboardShortcutGroup> data, Menu menu, int deviceId) { 1786 if (menu == null) { 1787 return; 1788 } 1789 KeyboardShortcutGroup group = null; 1790 int menuSize = menu.size(); 1791 for (int i = 0; i < menuSize; ++i) { 1792 final MenuItem item = menu.getItem(i); 1793 final CharSequence title = item.getTitle(); 1794 final char alphaShortcut = item.getAlphabeticShortcut(); 1795 final int alphaModifiers = item.getAlphabeticModifiers(); 1796 if (title != null && alphaShortcut != MIN_VALUE) { 1797 if (group == null) { 1798 final int resource = mApplication.getApplicationInfo().labelRes; 1799 group = new KeyboardShortcutGroup(resource != 0 ? getString(resource) : null); 1800 } 1801 group.addItem(new KeyboardShortcutInfo( 1802 title, alphaShortcut, alphaModifiers)); 1803 } 1804 } 1805 if (group != null) { 1806 data.add(group); 1807 } 1808 } 1809 1810 /** 1811 * Ask to have the current assistant shown to the user. This only works if the calling 1812 * activity is the current foreground activity. It is the same as calling 1813 * {@link android.service.voice.VoiceInteractionService#showSession 1814 * VoiceInteractionService.showSession} and requesting all of the possible context. 1815 * The receiver will always see 1816 * {@link android.service.voice.VoiceInteractionSession#SHOW_SOURCE_APPLICATION} set. 1817 * @return Returns true if the assistant was successfully invoked, else false. For example 1818 * false will be returned if the caller is not the current top activity. 1819 */ 1820 public boolean showAssist(Bundle args) { 1821 try { 1822 return ActivityManager.getService().showAssistFromActivity(mToken, args); 1823 } catch (RemoteException e) { 1824 } 1825 return false; 1826 } 1827 1828 /** 1829 * Called when you are no longer visible to the user. You will next 1830 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1831 * depending on later user activity. 1832 * 1833 * <p><em>Derived classes must call through to the super class's 1834 * implementation of this method. If they do not, an exception will be 1835 * thrown.</em></p> 1836 * 1837 * @see #onRestart 1838 * @see #onResume 1839 * @see #onSaveInstanceState 1840 * @see #onDestroy 1841 */ 1842 @CallSuper 1843 protected void onStop() { 1844 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStop " + this); 1845 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1846 mActivityTransitionState.onStop(); 1847 getApplication().dispatchActivityStopped(this); 1848 mTranslucentCallback = null; 1849 mCalled = true; 1850 if (isFinishing() && mAutoFillResetNeeded) { 1851 getAutofillManager().commit(); 1852 } 1853 } 1854 1855 /** 1856 * Perform any final cleanup before an activity is destroyed. This can 1857 * happen either because the activity is finishing (someone called 1858 * {@link #finish} on it, or because the system is temporarily destroying 1859 * this instance of the activity to save space. You can distinguish 1860 * between these two scenarios with the {@link #isFinishing} method. 1861 * 1862 * <p><em>Note: do not count on this method being called as a place for 1863 * saving data! For example, if an activity is editing data in a content 1864 * provider, those edits should be committed in either {@link #onPause} or 1865 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1866 * free resources like threads that are associated with an activity, so 1867 * that a destroyed activity does not leave such things around while the 1868 * rest of its application is still running. There are situations where 1869 * the system will simply kill the activity's hosting process without 1870 * calling this method (or any others) in it, so it should not be used to 1871 * do things that are intended to remain around after the process goes 1872 * away. 1873 * 1874 * <p><em>Derived classes must call through to the super class's 1875 * implementation of this method. If they do not, an exception will be 1876 * thrown.</em></p> 1877 * 1878 * @see #onPause 1879 * @see #onStop 1880 * @see #finish 1881 * @see #isFinishing 1882 */ 1883 @CallSuper 1884 protected void onDestroy() { 1885 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onDestroy " + this); 1886 mCalled = true; 1887 1888 // dismiss any dialogs we are managing. 1889 if (mManagedDialogs != null) { 1890 final int numDialogs = mManagedDialogs.size(); 1891 for (int i = 0; i < numDialogs; i++) { 1892 final ManagedDialog md = mManagedDialogs.valueAt(i); 1893 if (md.mDialog.isShowing()) { 1894 md.mDialog.dismiss(); 1895 } 1896 } 1897 mManagedDialogs = null; 1898 } 1899 1900 // close any cursors we are managing. 1901 synchronized (mManagedCursors) { 1902 int numCursors = mManagedCursors.size(); 1903 for (int i = 0; i < numCursors; i++) { 1904 ManagedCursor c = mManagedCursors.get(i); 1905 if (c != null) { 1906 c.mCursor.close(); 1907 } 1908 } 1909 mManagedCursors.clear(); 1910 } 1911 1912 // Close any open search dialog 1913 if (mSearchManager != null) { 1914 mSearchManager.stopSearch(); 1915 } 1916 1917 if (mActionBar != null) { 1918 mActionBar.onDestroy(); 1919 } 1920 1921 getApplication().dispatchActivityDestroyed(this); 1922 } 1923 1924 /** 1925 * Report to the system that your app is now fully drawn, purely for diagnostic 1926 * purposes (calling it does not impact the visible behavior of the activity). 1927 * This is only used to help instrument application launch times, so that the 1928 * app can report when it is fully in a usable state; without this, the only thing 1929 * the system itself can determine is the point at which the activity's window 1930 * is <em>first</em> drawn and displayed. To participate in app launch time 1931 * measurement, you should always call this method after first launch (when 1932 * {@link #onCreate(android.os.Bundle)} is called), at the point where you have 1933 * entirely drawn your UI and populated with all of the significant data. You 1934 * can safely call this method any time after first launch as well, in which case 1935 * it will simply be ignored. 1936 */ 1937 public void reportFullyDrawn() { 1938 if (mDoReportFullyDrawn) { 1939 mDoReportFullyDrawn = false; 1940 try { 1941 ActivityManager.getService().reportActivityFullyDrawn(mToken); 1942 } catch (RemoteException e) { 1943 } 1944 } 1945 } 1946 1947 /** 1948 * Called by the system when the activity changes from fullscreen mode to multi-window mode and 1949 * visa-versa. This method provides the same configuration that will be sent in the following 1950 * {@link #onConfigurationChanged(Configuration)} call after the activity enters this mode. 1951 * 1952 * @see android.R.attr#resizeableActivity 1953 * 1954 * @param isInMultiWindowMode True if the activity is in multi-window mode. 1955 * @param newConfig The new configuration of the activity with the state 1956 * {@param isInMultiWindowMode}. 1957 */ 1958 public void onMultiWindowModeChanged(boolean isInMultiWindowMode, Configuration newConfig) { 1959 // Left deliberately empty. There should be no side effects if a direct 1960 // subclass of Activity does not call super. 1961 onMultiWindowModeChanged(isInMultiWindowMode); 1962 } 1963 1964 /** 1965 * Called by the system when the activity changes from fullscreen mode to multi-window mode and 1966 * visa-versa. 1967 * 1968 * @see android.R.attr#resizeableActivity 1969 * 1970 * @param isInMultiWindowMode True if the activity is in multi-window mode. 1971 * 1972 * @deprecated Use {@link #onMultiWindowModeChanged(boolean, Configuration)} instead. 1973 */ 1974 @Deprecated 1975 public void onMultiWindowModeChanged(boolean isInMultiWindowMode) { 1976 // Left deliberately empty. There should be no side effects if a direct 1977 // subclass of Activity does not call super. 1978 } 1979 1980 /** 1981 * Returns true if the activity is currently in multi-window mode. 1982 * @see android.R.attr#resizeableActivity 1983 * 1984 * @return True if the activity is in multi-window mode. 1985 */ 1986 public boolean isInMultiWindowMode() { 1987 try { 1988 return ActivityManager.getService().isInMultiWindowMode(mToken); 1989 } catch (RemoteException e) { 1990 } 1991 return false; 1992 } 1993 1994 /** 1995 * Called by the system when the activity changes to and from picture-in-picture mode. This 1996 * method provides the same configuration that will be sent in the following 1997 * {@link #onConfigurationChanged(Configuration)} call after the activity enters this mode. 1998 * 1999 * @see android.R.attr#supportsPictureInPicture 2000 * 2001 * @param isInPictureInPictureMode True if the activity is in picture-in-picture mode. 2002 * @param newConfig The new configuration of the activity with the state 2003 * {@param isInPictureInPictureMode}. 2004 */ 2005 public void onPictureInPictureModeChanged(boolean isInPictureInPictureMode, 2006 Configuration newConfig) { 2007 // Left deliberately empty. There should be no side effects if a direct 2008 // subclass of Activity does not call super. 2009 onPictureInPictureModeChanged(isInPictureInPictureMode); 2010 } 2011 2012 /** 2013 * Called by the system when the activity changes to and from picture-in-picture mode. 2014 * 2015 * @see android.R.attr#supportsPictureInPicture 2016 * 2017 * @param isInPictureInPictureMode True if the activity is in picture-in-picture mode. 2018 * 2019 * @deprecated Use {@link #onPictureInPictureModeChanged(boolean, Configuration)} instead. 2020 */ 2021 @Deprecated 2022 public void onPictureInPictureModeChanged(boolean isInPictureInPictureMode) { 2023 // Left deliberately empty. There should be no side effects if a direct 2024 // subclass of Activity does not call super. 2025 } 2026 2027 /** 2028 * Returns true if the activity is currently in picture-in-picture mode. 2029 * @see android.R.attr#supportsPictureInPicture 2030 * 2031 * @return True if the activity is in picture-in-picture mode. 2032 */ 2033 public boolean isInPictureInPictureMode() { 2034 try { 2035 return ActivityManager.getService().isInPictureInPictureMode(mToken); 2036 } catch (RemoteException e) { 2037 } 2038 return false; 2039 } 2040 2041 /** 2042 * Puts the activity in picture-in-picture mode if possible in the current system state. Any 2043 * prior calls to {@link #setPictureInPictureParams(PictureInPictureParams)} will still apply 2044 * when entering picture-in-picture through this call. 2045 * 2046 * @see #enterPictureInPictureMode(PictureInPictureParams) 2047 * @see android.R.attr#supportsPictureInPicture 2048 */ 2049 @Deprecated 2050 public void enterPictureInPictureMode() { 2051 enterPictureInPictureMode(new PictureInPictureParams.Builder().build()); 2052 } 2053 2054 /** @removed */ 2055 @Deprecated 2056 public boolean enterPictureInPictureMode(@NonNull PictureInPictureArgs args) { 2057 return enterPictureInPictureMode(PictureInPictureArgs.convert(args)); 2058 } 2059 2060 /** 2061 * Puts the activity in picture-in-picture mode if possible in the current system state. The 2062 * set parameters in {@param params} will be combined with the parameters from prior calls to 2063 * {@link #setPictureInPictureParams(PictureInPictureParams)}. 2064 * 2065 * The system may disallow entering picture-in-picture in various cases, including when the 2066 * activity is not visible, if the screen is locked or if the user has an activity pinned. 2067 * 2068 * @see android.R.attr#supportsPictureInPicture 2069 * @see PictureInPictureParams 2070 * 2071 * @param params non-null parameters to be combined with previously set parameters when entering 2072 * picture-in-picture. 2073 * 2074 * @return true if the system puts this activity into picture-in-picture mode or was already 2075 * in picture-in-picture mode (@see {@link #isInPictureInPictureMode()) 2076 */ 2077 public boolean enterPictureInPictureMode(@NonNull PictureInPictureParams params) { 2078 try { 2079 if (params == null) { 2080 throw new IllegalArgumentException("Expected non-null picture-in-picture params"); 2081 } 2082 return ActivityManagerNative.getDefault().enterPictureInPictureMode(mToken, params); 2083 } catch (RemoteException e) { 2084 return false; 2085 } 2086 } 2087 2088 /** @removed */ 2089 @Deprecated 2090 public void setPictureInPictureArgs(@NonNull PictureInPictureArgs args) { 2091 setPictureInPictureParams(PictureInPictureArgs.convert(args)); 2092 } 2093 2094 /** 2095 * Updates the properties of the picture-in-picture activity, or sets it to be used later when 2096 * {@link #enterPictureInPictureMode()} is called. 2097 * 2098 * @param params the new parameters for the picture-in-picture. 2099 */ 2100 public void setPictureInPictureParams(@NonNull PictureInPictureParams params) { 2101 try { 2102 if (params == null) { 2103 throw new IllegalArgumentException("Expected non-null picture-in-picture params"); 2104 } 2105 ActivityManagerNative.getDefault().setPictureInPictureParams(mToken, params); 2106 } catch (RemoteException e) { 2107 } 2108 } 2109 2110 /** 2111 * Return the number of actions that will be displayed in the picture-in-picture UI when the 2112 * user interacts with the activity currently in picture-in-picture mode. This number may change 2113 * if the global configuration changes (ie. if the device is plugged into an external display), 2114 * but will always be larger than three. 2115 */ 2116 public int getMaxNumPictureInPictureActions() { 2117 try { 2118 return ActivityManagerNative.getDefault().getMaxNumPictureInPictureActions(mToken); 2119 } catch (RemoteException e) { 2120 return 0; 2121 } 2122 } 2123 2124 void dispatchMovedToDisplay(int displayId, Configuration config) { 2125 updateDisplay(displayId); 2126 onMovedToDisplay(displayId, config); 2127 } 2128 2129 /** 2130 * Called by the system when the activity is moved from one display to another without 2131 * recreation. This means that this activity is declared to handle all changes to configuration 2132 * that happened when it was switched to another display, so it wasn't destroyed and created 2133 * again. 2134 * 2135 * <p>This call will be followed by {@link #onConfigurationChanged(Configuration)} if the 2136 * applied configuration actually changed. It is up to app developer to choose whether to handle 2137 * the change in this method or in the following {@link #onConfigurationChanged(Configuration)} 2138 * call. 2139 * 2140 * <p>Use this callback to track changes to the displays if some activity functionality relies 2141 * on an association with some display properties. 2142 * 2143 * @param displayId The id of the display to which activity was moved. 2144 * @param config Configuration of the activity resources on new display after move. 2145 * 2146 * @see #onConfigurationChanged(Configuration) 2147 * @see View#onMovedToDisplay(int, Configuration) 2148 * @hide 2149 */ 2150 public void onMovedToDisplay(int displayId, Configuration config) { 2151 } 2152 2153 /** 2154 * Called by the system when the device configuration changes while your 2155 * activity is running. Note that this will <em>only</em> be called if 2156 * you have selected configurations you would like to handle with the 2157 * {@link android.R.attr#configChanges} attribute in your manifest. If 2158 * any configuration change occurs that is not selected to be reported 2159 * by that attribute, then instead of reporting it the system will stop 2160 * and restart the activity (to have it launched with the new 2161 * configuration). 2162 * 2163 * <p>At the time that this function has been called, your Resources 2164 * object will have been updated to return resource values matching the 2165 * new configuration. 2166 * 2167 * @param newConfig The new device configuration. 2168 */ 2169 public void onConfigurationChanged(Configuration newConfig) { 2170 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig); 2171 mCalled = true; 2172 2173 mFragments.dispatchConfigurationChanged(newConfig); 2174 2175 if (mWindow != null) { 2176 // Pass the configuration changed event to the window 2177 mWindow.onConfigurationChanged(newConfig); 2178 } 2179 2180 if (mActionBar != null) { 2181 // Do this last; the action bar will need to access 2182 // view changes from above. 2183 mActionBar.onConfigurationChanged(newConfig); 2184 } 2185 } 2186 2187 /** 2188 * If this activity is being destroyed because it can not handle a 2189 * configuration parameter being changed (and thus its 2190 * {@link #onConfigurationChanged(Configuration)} method is 2191 * <em>not</em> being called), then you can use this method to discover 2192 * the set of changes that have occurred while in the process of being 2193 * destroyed. Note that there is no guarantee that these will be 2194 * accurate (other changes could have happened at any time), so you should 2195 * only use this as an optimization hint. 2196 * 2197 * @return Returns a bit field of the configuration parameters that are 2198 * changing, as defined by the {@link android.content.res.Configuration} 2199 * class. 2200 */ 2201 public int getChangingConfigurations() { 2202 return mConfigChangeFlags; 2203 } 2204 2205 /** 2206 * Retrieve the non-configuration instance data that was previously 2207 * returned by {@link #onRetainNonConfigurationInstance()}. This will 2208 * be available from the initial {@link #onCreate} and 2209 * {@link #onStart} calls to the new instance, allowing you to extract 2210 * any useful dynamic state from the previous instance. 2211 * 2212 * <p>Note that the data you retrieve here should <em>only</em> be used 2213 * as an optimization for handling configuration changes. You should always 2214 * be able to handle getting a null pointer back, and an activity must 2215 * still be able to restore itself to its previous state (through the 2216 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 2217 * function returns null. 2218 * 2219 * <p><strong>Note:</strong> For most cases you should use the {@link Fragment} API 2220 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 2221 * available on older platforms through the Android support libraries. 2222 * 2223 * @return the object previously returned by {@link #onRetainNonConfigurationInstance()} 2224 */ 2225 @Nullable 2226 public Object getLastNonConfigurationInstance() { 2227 return mLastNonConfigurationInstances != null 2228 ? mLastNonConfigurationInstances.activity : null; 2229 } 2230 2231 /** 2232 * Called by the system, as part of destroying an 2233 * activity due to a configuration change, when it is known that a new 2234 * instance will immediately be created for the new configuration. You 2235 * can return any object you like here, including the activity instance 2236 * itself, which can later be retrieved by calling 2237 * {@link #getLastNonConfigurationInstance()} in the new activity 2238 * instance. 2239 * 2240 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2241 * or later, consider instead using a {@link Fragment} with 2242 * {@link Fragment#setRetainInstance(boolean) 2243 * Fragment.setRetainInstance(boolean}.</em> 2244 * 2245 * <p>This function is called purely as an optimization, and you must 2246 * not rely on it being called. When it is called, a number of guarantees 2247 * will be made to help optimize configuration switching: 2248 * <ul> 2249 * <li> The function will be called between {@link #onStop} and 2250 * {@link #onDestroy}. 2251 * <li> A new instance of the activity will <em>always</em> be immediately 2252 * created after this one's {@link #onDestroy()} is called. In particular, 2253 * <em>no</em> messages will be dispatched during this time (when the returned 2254 * object does not have an activity to be associated with). 2255 * <li> The object you return here will <em>always</em> be available from 2256 * the {@link #getLastNonConfigurationInstance()} method of the following 2257 * activity instance as described there. 2258 * </ul> 2259 * 2260 * <p>These guarantees are designed so that an activity can use this API 2261 * to propagate extensive state from the old to new activity instance, from 2262 * loaded bitmaps, to network connections, to evenly actively running 2263 * threads. Note that you should <em>not</em> propagate any data that 2264 * may change based on the configuration, including any data loaded from 2265 * resources such as strings, layouts, or drawables. 2266 * 2267 * <p>The guarantee of no message handling during the switch to the next 2268 * activity simplifies use with active objects. For example if your retained 2269 * state is an {@link android.os.AsyncTask} you are guaranteed that its 2270 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 2271 * not be called from the call here until you execute the next instance's 2272 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 2273 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 2274 * running in a separate thread.) 2275 * 2276 * <p><strong>Note:</strong> For most cases you should use the {@link Fragment} API 2277 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 2278 * available on older platforms through the Android support libraries. 2279 * 2280 * @return any Object holding the desired state to propagate to the 2281 * next activity instance 2282 */ 2283 public Object onRetainNonConfigurationInstance() { 2284 return null; 2285 } 2286 2287 /** 2288 * Retrieve the non-configuration instance data that was previously 2289 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 2290 * be available from the initial {@link #onCreate} and 2291 * {@link #onStart} calls to the new instance, allowing you to extract 2292 * any useful dynamic state from the previous instance. 2293 * 2294 * <p>Note that the data you retrieve here should <em>only</em> be used 2295 * as an optimization for handling configuration changes. You should always 2296 * be able to handle getting a null pointer back, and an activity must 2297 * still be able to restore itself to its previous state (through the 2298 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 2299 * function returns null. 2300 * 2301 * @return Returns the object previously returned by 2302 * {@link #onRetainNonConfigurationChildInstances()} 2303 */ 2304 @Nullable 2305 HashMap<String, Object> getLastNonConfigurationChildInstances() { 2306 return mLastNonConfigurationInstances != null 2307 ? mLastNonConfigurationInstances.children : null; 2308 } 2309 2310 /** 2311 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 2312 * it should return either a mapping from child activity id strings to arbitrary objects, 2313 * or null. This method is intended to be used by Activity framework subclasses that control a 2314 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 2315 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 2316 */ 2317 @Nullable 2318 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 2319 return null; 2320 } 2321 2322 NonConfigurationInstances retainNonConfigurationInstances() { 2323 Object activity = onRetainNonConfigurationInstance(); 2324 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 2325 FragmentManagerNonConfig fragments = mFragments.retainNestedNonConfig(); 2326 2327 // We're already stopped but we've been asked to retain. 2328 // Our fragments are taken care of but we need to mark the loaders for retention. 2329 // In order to do this correctly we need to restart the loaders first before 2330 // handing them off to the next activity. 2331 mFragments.doLoaderStart(); 2332 mFragments.doLoaderStop(true); 2333 ArrayMap<String, LoaderManager> loaders = mFragments.retainLoaderNonConfig(); 2334 2335 if (activity == null && children == null && fragments == null && loaders == null 2336 && mVoiceInteractor == null) { 2337 return null; 2338 } 2339 2340 NonConfigurationInstances nci = new NonConfigurationInstances(); 2341 nci.activity = activity; 2342 nci.children = children; 2343 nci.fragments = fragments; 2344 nci.loaders = loaders; 2345 if (mVoiceInteractor != null) { 2346 mVoiceInteractor.retainInstance(); 2347 nci.voiceInteractor = mVoiceInteractor; 2348 } 2349 return nci; 2350 } 2351 2352 public void onLowMemory() { 2353 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onLowMemory " + this); 2354 mCalled = true; 2355 mFragments.dispatchLowMemory(); 2356 } 2357 2358 public void onTrimMemory(int level) { 2359 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onTrimMemory " + this + ": " + level); 2360 mCalled = true; 2361 mFragments.dispatchTrimMemory(level); 2362 } 2363 2364 /** 2365 * Return the FragmentManager for interacting with fragments associated 2366 * with this activity. 2367 */ 2368 public FragmentManager getFragmentManager() { 2369 return mFragments.getFragmentManager(); 2370 } 2371 2372 /** 2373 * Called when a Fragment is being attached to this activity, immediately 2374 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 2375 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 2376 */ 2377 public void onAttachFragment(Fragment fragment) { 2378 } 2379 2380 /** 2381 * Wrapper around 2382 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 2383 * that gives the resulting {@link Cursor} to call 2384 * {@link #startManagingCursor} so that the activity will manage its 2385 * lifecycle for you. 2386 * 2387 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2388 * or later, consider instead using {@link LoaderManager} instead, available 2389 * via {@link #getLoaderManager()}.</em> 2390 * 2391 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 2392 * this method, because the activity will do that for you at the appropriate time. However, if 2393 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 2394 * not</em> automatically close the cursor and, in that case, you must call 2395 * {@link Cursor#close()}.</p> 2396 * 2397 * @param uri The URI of the content provider to query. 2398 * @param projection List of columns to return. 2399 * @param selection SQL WHERE clause. 2400 * @param sortOrder SQL ORDER BY clause. 2401 * 2402 * @return The Cursor that was returned by query(). 2403 * 2404 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 2405 * @see #startManagingCursor 2406 * @hide 2407 * 2408 * @deprecated Use {@link CursorLoader} instead. 2409 */ 2410 @Deprecated 2411 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 2412 String sortOrder) { 2413 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 2414 if (c != null) { 2415 startManagingCursor(c); 2416 } 2417 return c; 2418 } 2419 2420 /** 2421 * Wrapper around 2422 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 2423 * that gives the resulting {@link Cursor} to call 2424 * {@link #startManagingCursor} so that the activity will manage its 2425 * lifecycle for you. 2426 * 2427 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2428 * or later, consider instead using {@link LoaderManager} instead, available 2429 * via {@link #getLoaderManager()}.</em> 2430 * 2431 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 2432 * this method, because the activity will do that for you at the appropriate time. However, if 2433 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 2434 * not</em> automatically close the cursor and, in that case, you must call 2435 * {@link Cursor#close()}.</p> 2436 * 2437 * @param uri The URI of the content provider to query. 2438 * @param projection List of columns to return. 2439 * @param selection SQL WHERE clause. 2440 * @param selectionArgs The arguments to selection, if any ?s are pesent 2441 * @param sortOrder SQL ORDER BY clause. 2442 * 2443 * @return The Cursor that was returned by query(). 2444 * 2445 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 2446 * @see #startManagingCursor 2447 * 2448 * @deprecated Use {@link CursorLoader} instead. 2449 */ 2450 @Deprecated 2451 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 2452 String[] selectionArgs, String sortOrder) { 2453 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 2454 if (c != null) { 2455 startManagingCursor(c); 2456 } 2457 return c; 2458 } 2459 2460 /** 2461 * This method allows the activity to take care of managing the given 2462 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 2463 * That is, when the activity is stopped it will automatically call 2464 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 2465 * it will call {@link Cursor#requery} for you. When the activity is 2466 * destroyed, all managed Cursors will be closed automatically. 2467 * 2468 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2469 * or later, consider instead using {@link LoaderManager} instead, available 2470 * via {@link #getLoaderManager()}.</em> 2471 * 2472 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 2473 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 2474 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 2475 * <em>will not</em> automatically close the cursor and, in that case, you must call 2476 * {@link Cursor#close()}.</p> 2477 * 2478 * @param c The Cursor to be managed. 2479 * 2480 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 2481 * @see #stopManagingCursor 2482 * 2483 * @deprecated Use the new {@link android.content.CursorLoader} class with 2484 * {@link LoaderManager} instead; this is also 2485 * available on older platforms through the Android compatibility package. 2486 */ 2487 @Deprecated 2488 public void startManagingCursor(Cursor c) { 2489 synchronized (mManagedCursors) { 2490 mManagedCursors.add(new ManagedCursor(c)); 2491 } 2492 } 2493 2494 /** 2495 * Given a Cursor that was previously given to 2496 * {@link #startManagingCursor}, stop the activity's management of that 2497 * cursor. 2498 * 2499 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 2500 * the system <em>will not</em> automatically close the cursor and you must call 2501 * {@link Cursor#close()}.</p> 2502 * 2503 * @param c The Cursor that was being managed. 2504 * 2505 * @see #startManagingCursor 2506 * 2507 * @deprecated Use the new {@link android.content.CursorLoader} class with 2508 * {@link LoaderManager} instead; this is also 2509 * available on older platforms through the Android compatibility package. 2510 */ 2511 @Deprecated 2512 public void stopManagingCursor(Cursor c) { 2513 synchronized (mManagedCursors) { 2514 final int N = mManagedCursors.size(); 2515 for (int i=0; i<N; i++) { 2516 ManagedCursor mc = mManagedCursors.get(i); 2517 if (mc.mCursor == c) { 2518 mManagedCursors.remove(i); 2519 break; 2520 } 2521 } 2522 } 2523 } 2524 2525 /** 2526 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 2527 * this is a no-op. 2528 * @hide 2529 */ 2530 @Deprecated 2531 public void setPersistent(boolean isPersistent) { 2532 } 2533 2534 /** 2535 * Finds a view that was identified by the {@code android:id} XML attribute 2536 * that was processed in {@link #onCreate}. 2537 * <p> 2538 * <strong>Note:</strong> In most cases -- depending on compiler support -- 2539 * the resulting view is automatically cast to the target class type. If 2540 * the target class type is unconstrained, an explicit cast may be 2541 * necessary. 2542 * 2543 * @param id the ID to search for 2544 * @return a view with given ID if found, or {@code null} otherwise 2545 * @see View#findViewById(int) 2546 */ 2547 @Nullable 2548 public <T extends View> T findViewById(@IdRes int id) { 2549 return getWindow().findViewById(id); 2550 } 2551 2552 /** 2553 * Retrieve a reference to this activity's ActionBar. 2554 * 2555 * @return The Activity's ActionBar, or null if it does not have one. 2556 */ 2557 @Nullable 2558 public ActionBar getActionBar() { 2559 initWindowDecorActionBar(); 2560 return mActionBar; 2561 } 2562 2563 /** 2564 * Set a {@link android.widget.Toolbar Toolbar} to act as the {@link ActionBar} for this 2565 * Activity window. 2566 * 2567 * <p>When set to a non-null value the {@link #getActionBar()} method will return 2568 * an {@link ActionBar} object that can be used to control the given toolbar as if it were 2569 * a traditional window decor action bar. The toolbar's menu will be populated with the 2570 * Activity's options menu and the navigation button will be wired through the standard 2571 * {@link android.R.id#home home} menu select action.</p> 2572 * 2573 * <p>In order to use a Toolbar within the Activity's window content the application 2574 * must not request the window feature {@link Window#FEATURE_ACTION_BAR FEATURE_ACTION_BAR}.</p> 2575 * 2576 * @param toolbar Toolbar to set as the Activity's action bar, or {@code null} to clear it 2577 */ 2578 public void setActionBar(@Nullable Toolbar toolbar) { 2579 final ActionBar ab = getActionBar(); 2580 if (ab instanceof WindowDecorActionBar) { 2581 throw new IllegalStateException("This Activity already has an action bar supplied " + 2582 "by the window decor. Do not request Window.FEATURE_ACTION_BAR and set " + 2583 "android:windowActionBar to false in your theme to use a Toolbar instead."); 2584 } 2585 2586 // If we reach here then we're setting a new action bar 2587 // First clear out the MenuInflater to make sure that it is valid for the new Action Bar 2588 mMenuInflater = null; 2589 2590 // If we have an action bar currently, destroy it 2591 if (ab != null) { 2592 ab.onDestroy(); 2593 } 2594 2595 if (toolbar != null) { 2596 final ToolbarActionBar tbab = new ToolbarActionBar(toolbar, getTitle(), this); 2597 mActionBar = tbab; 2598 mWindow.setCallback(tbab.getWrappedWindowCallback()); 2599 } else { 2600 mActionBar = null; 2601 // Re-set the original window callback since we may have already set a Toolbar wrapper 2602 mWindow.setCallback(this); 2603 } 2604 2605 invalidateOptionsMenu(); 2606 } 2607 2608 /** 2609 * Creates a new ActionBar, locates the inflated ActionBarView, 2610 * initializes the ActionBar with the view, and sets mActionBar. 2611 */ 2612 private void initWindowDecorActionBar() { 2613 Window window = getWindow(); 2614 2615 // Initializing the window decor can change window feature flags. 2616 // Make sure that we have the correct set before performing the test below. 2617 window.getDecorView(); 2618 2619 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 2620 return; 2621 } 2622 2623 mActionBar = new WindowDecorActionBar(this); 2624 mActionBar.setDefaultDisplayHomeAsUpEnabled(mEnableDefaultActionBarUp); 2625 2626 mWindow.setDefaultIcon(mActivityInfo.getIconResource()); 2627 mWindow.setDefaultLogo(mActivityInfo.getLogoResource()); 2628 } 2629 2630 /** 2631 * Set the activity content from a layout resource. The resource will be 2632 * inflated, adding all top-level views to the activity. 2633 * 2634 * @param layoutResID Resource ID to be inflated. 2635 * 2636 * @see #setContentView(android.view.View) 2637 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2638 */ 2639 public void setContentView(@LayoutRes int layoutResID) { 2640 getWindow().setContentView(layoutResID); 2641 initWindowDecorActionBar(); 2642 } 2643 2644 /** 2645 * Set the activity content to an explicit view. This view is placed 2646 * directly into the activity's view hierarchy. It can itself be a complex 2647 * view hierarchy. When calling this method, the layout parameters of the 2648 * specified view are ignored. Both the width and the height of the view are 2649 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 2650 * your own layout parameters, invoke 2651 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 2652 * instead. 2653 * 2654 * @param view The desired content to display. 2655 * 2656 * @see #setContentView(int) 2657 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2658 */ 2659 public void setContentView(View view) { 2660 getWindow().setContentView(view); 2661 initWindowDecorActionBar(); 2662 } 2663 2664 /** 2665 * Set the activity content to an explicit view. This view is placed 2666 * directly into the activity's view hierarchy. It can itself be a complex 2667 * view hierarchy. 2668 * 2669 * @param view The desired content to display. 2670 * @param params Layout parameters for the view. 2671 * 2672 * @see #setContentView(android.view.View) 2673 * @see #setContentView(int) 2674 */ 2675 public void setContentView(View view, ViewGroup.LayoutParams params) { 2676 getWindow().setContentView(view, params); 2677 initWindowDecorActionBar(); 2678 } 2679 2680 /** 2681 * Add an additional content view to the activity. Added after any existing 2682 * ones in the activity -- existing views are NOT removed. 2683 * 2684 * @param view The desired content to display. 2685 * @param params Layout parameters for the view. 2686 */ 2687 public void addContentView(View view, ViewGroup.LayoutParams params) { 2688 getWindow().addContentView(view, params); 2689 initWindowDecorActionBar(); 2690 } 2691 2692 /** 2693 * Retrieve the {@link TransitionManager} responsible for default transitions in this window. 2694 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2695 * 2696 * <p>This method will return non-null after content has been initialized (e.g. by using 2697 * {@link #setContentView}) if {@link Window#FEATURE_CONTENT_TRANSITIONS} has been granted.</p> 2698 * 2699 * @return This window's content TransitionManager or null if none is set. 2700 */ 2701 public TransitionManager getContentTransitionManager() { 2702 return getWindow().getTransitionManager(); 2703 } 2704 2705 /** 2706 * Set the {@link TransitionManager} to use for default transitions in this window. 2707 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2708 * 2709 * @param tm The TransitionManager to use for scene changes. 2710 */ 2711 public void setContentTransitionManager(TransitionManager tm) { 2712 getWindow().setTransitionManager(tm); 2713 } 2714 2715 /** 2716 * Retrieve the {@link Scene} representing this window's current content. 2717 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2718 * 2719 * <p>This method will return null if the current content is not represented by a Scene.</p> 2720 * 2721 * @return Current Scene being shown or null 2722 */ 2723 public Scene getContentScene() { 2724 return getWindow().getContentScene(); 2725 } 2726 2727 /** 2728 * Sets whether this activity is finished when touched outside its window's 2729 * bounds. 2730 */ 2731 public void setFinishOnTouchOutside(boolean finish) { 2732 mWindow.setCloseOnTouchOutside(finish); 2733 } 2734 2735 /** @hide */ 2736 @IntDef(prefix = { "DEFAULT_KEYS_" }, value = { 2737 DEFAULT_KEYS_DISABLE, 2738 DEFAULT_KEYS_DIALER, 2739 DEFAULT_KEYS_SHORTCUT, 2740 DEFAULT_KEYS_SEARCH_LOCAL, 2741 DEFAULT_KEYS_SEARCH_GLOBAL 2742 }) 2743 @Retention(RetentionPolicy.SOURCE) 2744 @interface DefaultKeyMode {} 2745 2746 /** 2747 * Use with {@link #setDefaultKeyMode} to turn off default handling of 2748 * keys. 2749 * 2750 * @see #setDefaultKeyMode 2751 */ 2752 static public final int DEFAULT_KEYS_DISABLE = 0; 2753 /** 2754 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 2755 * key handling. 2756 * 2757 * @see #setDefaultKeyMode 2758 */ 2759 static public final int DEFAULT_KEYS_DIALER = 1; 2760 /** 2761 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 2762 * default key handling. 2763 * 2764 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 2765 * 2766 * @see #setDefaultKeyMode 2767 */ 2768 static public final int DEFAULT_KEYS_SHORTCUT = 2; 2769 /** 2770 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2771 * will start an application-defined search. (If the application or activity does not 2772 * actually define a search, the the keys will be ignored.) 2773 * 2774 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2775 * 2776 * @see #setDefaultKeyMode 2777 */ 2778 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 2779 2780 /** 2781 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2782 * will start a global search (typically web search, but some platforms may define alternate 2783 * methods for global search) 2784 * 2785 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2786 * 2787 * @see #setDefaultKeyMode 2788 */ 2789 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 2790 2791 /** 2792 * Select the default key handling for this activity. This controls what 2793 * will happen to key events that are not otherwise handled. The default 2794 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 2795 * floor. Other modes allow you to launch the dialer 2796 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 2797 * menu without requiring the menu key be held down 2798 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 2799 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 2800 * 2801 * <p>Note that the mode selected here does not impact the default 2802 * handling of system keys, such as the "back" and "menu" keys, and your 2803 * activity and its views always get a first chance to receive and handle 2804 * all application keys. 2805 * 2806 * @param mode The desired default key mode constant. 2807 * 2808 * @see #onKeyDown 2809 */ 2810 public final void setDefaultKeyMode(@DefaultKeyMode int mode) { 2811 mDefaultKeyMode = mode; 2812 2813 // Some modes use a SpannableStringBuilder to track & dispatch input events 2814 // This list must remain in sync with the switch in onKeyDown() 2815 switch (mode) { 2816 case DEFAULT_KEYS_DISABLE: 2817 case DEFAULT_KEYS_SHORTCUT: 2818 mDefaultKeySsb = null; // not used in these modes 2819 break; 2820 case DEFAULT_KEYS_DIALER: 2821 case DEFAULT_KEYS_SEARCH_LOCAL: 2822 case DEFAULT_KEYS_SEARCH_GLOBAL: 2823 mDefaultKeySsb = new SpannableStringBuilder(); 2824 Selection.setSelection(mDefaultKeySsb,0); 2825 break; 2826 default: 2827 throw new IllegalArgumentException(); 2828 } 2829 } 2830 2831 /** 2832 * Called when a key was pressed down and not handled by any of the views 2833 * inside of the activity. So, for example, key presses while the cursor 2834 * is inside a TextView will not trigger the event (unless it is a navigation 2835 * to another object) because TextView handles its own key presses. 2836 * 2837 * <p>If the focused view didn't want this event, this method is called. 2838 * 2839 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2840 * by calling {@link #onBackPressed()}, though the behavior varies based 2841 * on the application compatibility mode: for 2842 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2843 * it will set up the dispatch to call {@link #onKeyUp} where the action 2844 * will be performed; for earlier applications, it will perform the 2845 * action immediately in on-down, as those versions of the platform 2846 * behaved. 2847 * 2848 * <p>Other additional default key handling may be performed 2849 * if configured with {@link #setDefaultKeyMode}. 2850 * 2851 * @return Return <code>true</code> to prevent this event from being propagated 2852 * further, or <code>false</code> to indicate that you have not handled 2853 * this event and it should continue to be propagated. 2854 * @see #onKeyUp 2855 * @see android.view.KeyEvent 2856 */ 2857 public boolean onKeyDown(int keyCode, KeyEvent event) { 2858 if (keyCode == KeyEvent.KEYCODE_BACK) { 2859 if (getApplicationInfo().targetSdkVersion 2860 >= Build.VERSION_CODES.ECLAIR) { 2861 event.startTracking(); 2862 } else { 2863 onBackPressed(); 2864 } 2865 return true; 2866 } 2867 2868 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2869 return false; 2870 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2871 Window w = getWindow(); 2872 if (w.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 2873 w.performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, keyCode, event, 2874 Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2875 return true; 2876 } 2877 return false; 2878 } else if (keyCode == KeyEvent.KEYCODE_TAB) { 2879 // Don't consume TAB here since it's used for navigation. Arrow keys 2880 // aren't considered "typing keys" so they already won't get consumed. 2881 return false; 2882 } else { 2883 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2884 boolean clearSpannable = false; 2885 boolean handled; 2886 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2887 clearSpannable = true; 2888 handled = false; 2889 } else { 2890 handled = TextKeyListener.getInstance().onKeyDown( 2891 null, mDefaultKeySsb, keyCode, event); 2892 if (handled && mDefaultKeySsb.length() > 0) { 2893 // something useable has been typed - dispatch it now. 2894 2895 final String str = mDefaultKeySsb.toString(); 2896 clearSpannable = true; 2897 2898 switch (mDefaultKeyMode) { 2899 case DEFAULT_KEYS_DIALER: 2900 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2901 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2902 startActivity(intent); 2903 break; 2904 case DEFAULT_KEYS_SEARCH_LOCAL: 2905 startSearch(str, false, null, false); 2906 break; 2907 case DEFAULT_KEYS_SEARCH_GLOBAL: 2908 startSearch(str, false, null, true); 2909 break; 2910 } 2911 } 2912 } 2913 if (clearSpannable) { 2914 mDefaultKeySsb.clear(); 2915 mDefaultKeySsb.clearSpans(); 2916 Selection.setSelection(mDefaultKeySsb,0); 2917 } 2918 return handled; 2919 } 2920 } 2921 2922 /** 2923 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2924 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2925 * the event). 2926 */ 2927 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2928 return false; 2929 } 2930 2931 /** 2932 * Called when a key was released and not handled by any of the views 2933 * inside of the activity. So, for example, key presses while the cursor 2934 * is inside a TextView will not trigger the event (unless it is a navigation 2935 * to another object) because TextView handles its own key presses. 2936 * 2937 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2938 * and go back. 2939 * 2940 * @return Return <code>true</code> to prevent this event from being propagated 2941 * further, or <code>false</code> to indicate that you have not handled 2942 * this event and it should continue to be propagated. 2943 * @see #onKeyDown 2944 * @see KeyEvent 2945 */ 2946 public boolean onKeyUp(int keyCode, KeyEvent event) { 2947 if (getApplicationInfo().targetSdkVersion 2948 >= Build.VERSION_CODES.ECLAIR) { 2949 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2950 && !event.isCanceled()) { 2951 onBackPressed(); 2952 return true; 2953 } 2954 } 2955 return false; 2956 } 2957 2958 /** 2959 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2960 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2961 * the event). 2962 */ 2963 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2964 return false; 2965 } 2966 2967 /** 2968 * Called when the activity has detected the user's press of the back 2969 * key. The default implementation simply finishes the current activity, 2970 * but you can override this to do whatever you want. 2971 */ 2972 public void onBackPressed() { 2973 if (mActionBar != null && mActionBar.collapseActionView()) { 2974 return; 2975 } 2976 2977 FragmentManager fragmentManager = mFragments.getFragmentManager(); 2978 2979 if (fragmentManager.isStateSaved() || !fragmentManager.popBackStackImmediate()) { 2980 finishAfterTransition(); 2981 } 2982 } 2983 2984 /** 2985 * Called when a key shortcut event is not handled by any of the views in the Activity. 2986 * Override this method to implement global key shortcuts for the Activity. 2987 * Key shortcuts can also be implemented by setting the 2988 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2989 * 2990 * @param keyCode The value in event.getKeyCode(). 2991 * @param event Description of the key event. 2992 * @return True if the key shortcut was handled. 2993 */ 2994 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2995 // Let the Action Bar have a chance at handling the shortcut. 2996 ActionBar actionBar = getActionBar(); 2997 return (actionBar != null && actionBar.onKeyShortcut(keyCode, event)); 2998 } 2999 3000 /** 3001 * Called when a touch screen event was not handled by any of the views 3002 * under it. This is most useful to process touch events that happen 3003 * outside of your window bounds, where there is no view to receive it. 3004 * 3005 * @param event The touch screen event being processed. 3006 * 3007 * @return Return true if you have consumed the event, false if you haven't. 3008 * The default implementation always returns false. 3009 */ 3010 public boolean onTouchEvent(MotionEvent event) { 3011 if (mWindow.shouldCloseOnTouch(this, event)) { 3012 finish(); 3013 return true; 3014 } 3015 3016 return false; 3017 } 3018 3019 /** 3020 * Called when the trackball was moved and not handled by any of the 3021 * views inside of the activity. So, for example, if the trackball moves 3022 * while focus is on a button, you will receive a call here because 3023 * buttons do not normally do anything with trackball events. The call 3024 * here happens <em>before</em> trackball movements are converted to 3025 * DPAD key events, which then get sent back to the view hierarchy, and 3026 * will be processed at the point for things like focus navigation. 3027 * 3028 * @param event The trackball event being processed. 3029 * 3030 * @return Return true if you have consumed the event, false if you haven't. 3031 * The default implementation always returns false. 3032 */ 3033 public boolean onTrackballEvent(MotionEvent event) { 3034 return false; 3035 } 3036 3037 /** 3038 * Called when a generic motion event was not handled by any of the 3039 * views inside of the activity. 3040 * <p> 3041 * Generic motion events describe joystick movements, mouse hovers, track pad 3042 * touches, scroll wheel movements and other input events. The 3043 * {@link MotionEvent#getSource() source} of the motion event specifies 3044 * the class of input that was received. Implementations of this method 3045 * must examine the bits in the source before processing the event. 3046 * The following code example shows how this is done. 3047 * </p><p> 3048 * Generic motion events with source class 3049 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 3050 * are delivered to the view under the pointer. All other generic motion events are 3051 * delivered to the focused view. 3052 * </p><p> 3053 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 3054 * handle this event. 3055 * </p> 3056 * 3057 * @param event The generic motion event being processed. 3058 * 3059 * @return Return true if you have consumed the event, false if you haven't. 3060 * The default implementation always returns false. 3061 */ 3062 public boolean onGenericMotionEvent(MotionEvent event) { 3063 return false; 3064 } 3065 3066 /** 3067 * Called whenever a key, touch, or trackball event is dispatched to the 3068 * activity. Implement this method if you wish to know that the user has 3069 * interacted with the device in some way while your activity is running. 3070 * This callback and {@link #onUserLeaveHint} are intended to help 3071 * activities manage status bar notifications intelligently; specifically, 3072 * for helping activities determine the proper time to cancel a notfication. 3073 * 3074 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 3075 * be accompanied by calls to {@link #onUserInteraction}. This 3076 * ensures that your activity will be told of relevant user activity such 3077 * as pulling down the notification pane and touching an item there. 3078 * 3079 * <p>Note that this callback will be invoked for the touch down action 3080 * that begins a touch gesture, but may not be invoked for the touch-moved 3081 * and touch-up actions that follow. 3082 * 3083 * @see #onUserLeaveHint() 3084 */ 3085 public void onUserInteraction() { 3086 } 3087 3088 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 3089 // Update window manager if: we have a view, that view is 3090 // attached to its parent (which will be a RootView), and 3091 // this activity is not embedded. 3092 if (mParent == null) { 3093 View decor = mDecor; 3094 if (decor != null && decor.getParent() != null) { 3095 getWindowManager().updateViewLayout(decor, params); 3096 } 3097 } 3098 } 3099 3100 public void onContentChanged() { 3101 } 3102 3103 /** 3104 * Called when the current {@link Window} of the activity gains or loses 3105 * focus. This is the best indicator of whether this activity is visible 3106 * to the user. The default implementation clears the key tracking 3107 * state, so should always be called. 3108 * 3109 * <p>Note that this provides information about global focus state, which 3110 * is managed independently of activity lifecycles. As such, while focus 3111 * changes will generally have some relation to lifecycle changes (an 3112 * activity that is stopped will not generally get window focus), you 3113 * should not rely on any particular order between the callbacks here and 3114 * those in the other lifecycle methods such as {@link #onResume}. 3115 * 3116 * <p>As a general rule, however, a resumed activity will have window 3117 * focus... unless it has displayed other dialogs or popups that take 3118 * input focus, in which case the activity itself will not have focus 3119 * when the other windows have it. Likewise, the system may display 3120 * system-level windows (such as the status bar notification panel or 3121 * a system alert) which will temporarily take window input focus without 3122 * pausing the foreground activity. 3123 * 3124 * @param hasFocus Whether the window of this activity has focus. 3125 * 3126 * @see #hasWindowFocus() 3127 * @see #onResume 3128 * @see View#onWindowFocusChanged(boolean) 3129 */ 3130 public void onWindowFocusChanged(boolean hasFocus) { 3131 } 3132 3133 /** 3134 * Called when the main window associated with the activity has been 3135 * attached to the window manager. 3136 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 3137 * for more information. 3138 * @see View#onAttachedToWindow 3139 */ 3140 public void onAttachedToWindow() { 3141 } 3142 3143 /** 3144 * Called when the main window associated with the activity has been 3145 * detached from the window manager. 3146 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 3147 * for more information. 3148 * @see View#onDetachedFromWindow 3149 */ 3150 public void onDetachedFromWindow() { 3151 } 3152 3153 /** 3154 * Returns true if this activity's <em>main</em> window currently has window focus. 3155 * Note that this is not the same as the view itself having focus. 3156 * 3157 * @return True if this activity's main window currently has window focus. 3158 * 3159 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 3160 */ 3161 public boolean hasWindowFocus() { 3162 Window w = getWindow(); 3163 if (w != null) { 3164 View d = w.getDecorView(); 3165 if (d != null) { 3166 return d.hasWindowFocus(); 3167 } 3168 } 3169 return false; 3170 } 3171 3172 /** 3173 * Called when the main window associated with the activity has been dismissed. 3174 * @hide 3175 */ 3176 @Override 3177 public void onWindowDismissed(boolean finishTask, boolean suppressWindowTransition) { 3178 finish(finishTask ? FINISH_TASK_WITH_ACTIVITY : DONT_FINISH_TASK_WITH_ACTIVITY); 3179 if (suppressWindowTransition) { 3180 overridePendingTransition(0, 0); 3181 } 3182 } 3183 3184 3185 /** 3186 * Moves the activity from 3187 * {@link android.app.ActivityManager.StackId#FREEFORM_WORKSPACE_STACK_ID} to 3188 * {@link android.app.ActivityManager.StackId#FULLSCREEN_WORKSPACE_STACK_ID} stack. 3189 * 3190 * @hide 3191 */ 3192 @Override 3193 public void exitFreeformMode() throws RemoteException { 3194 ActivityManager.getService().exitFreeformMode(mToken); 3195 } 3196 3197 /** Returns the current stack Id for the window. 3198 * @hide 3199 */ 3200 @Override 3201 public int getWindowStackId() throws RemoteException { 3202 return ActivityManager.getService().getActivityStackId(mToken); 3203 } 3204 3205 /** 3206 * Puts the activity in picture-in-picture mode if the activity supports. 3207 * @see android.R.attr#supportsPictureInPicture 3208 * @hide 3209 */ 3210 @Override 3211 public void enterPictureInPictureModeIfPossible() { 3212 if (mActivityInfo.supportsPictureInPicture()) { 3213 enterPictureInPictureMode(); 3214 } 3215 } 3216 3217 /** 3218 * Called to process key events. You can override this to intercept all 3219 * key events before they are dispatched to the window. Be sure to call 3220 * this implementation for key events that should be handled normally. 3221 * 3222 * @param event The key event. 3223 * 3224 * @return boolean Return true if this event was consumed. 3225 */ 3226 public boolean dispatchKeyEvent(KeyEvent event) { 3227 onUserInteraction(); 3228 3229 // Let action bars open menus in response to the menu key prioritized over 3230 // the window handling it 3231 final int keyCode = event.getKeyCode(); 3232 if (keyCode == KeyEvent.KEYCODE_MENU && 3233 mActionBar != null && mActionBar.onMenuKeyEvent(event)) { 3234 return true; 3235 } 3236 3237 Window win = getWindow(); 3238 if (win.superDispatchKeyEvent(event)) { 3239 return true; 3240 } 3241 View decor = mDecor; 3242 if (decor == null) decor = win.getDecorView(); 3243 return event.dispatch(this, decor != null 3244 ? decor.getKeyDispatcherState() : null, this); 3245 } 3246 3247 /** 3248 * Called to process a key shortcut event. 3249 * You can override this to intercept all key shortcut events before they are 3250 * dispatched to the window. Be sure to call this implementation for key shortcut 3251 * events that should be handled normally. 3252 * 3253 * @param event The key shortcut event. 3254 * @return True if this event was consumed. 3255 */ 3256 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 3257 onUserInteraction(); 3258 if (getWindow().superDispatchKeyShortcutEvent(event)) { 3259 return true; 3260 } 3261 return onKeyShortcut(event.getKeyCode(), event); 3262 } 3263 3264 /** 3265 * Called to process touch screen events. You can override this to 3266 * intercept all touch screen events before they are dispatched to the 3267 * window. Be sure to call this implementation for touch screen events 3268 * that should be handled normally. 3269 * 3270 * @param ev The touch screen event. 3271 * 3272 * @return boolean Return true if this event was consumed. 3273 */ 3274 public boolean dispatchTouchEvent(MotionEvent ev) { 3275 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 3276 onUserInteraction(); 3277 } 3278 if (getWindow().superDispatchTouchEvent(ev)) { 3279 return true; 3280 } 3281 return onTouchEvent(ev); 3282 } 3283 3284 /** 3285 * Called to process trackball events. You can override this to 3286 * intercept all trackball events before they are dispatched to the 3287 * window. Be sure to call this implementation for trackball events 3288 * that should be handled normally. 3289 * 3290 * @param ev The trackball event. 3291 * 3292 * @return boolean Return true if this event was consumed. 3293 */ 3294 public boolean dispatchTrackballEvent(MotionEvent ev) { 3295 onUserInteraction(); 3296 if (getWindow().superDispatchTrackballEvent(ev)) { 3297 return true; 3298 } 3299 return onTrackballEvent(ev); 3300 } 3301 3302 /** 3303 * Called to process generic motion events. You can override this to 3304 * intercept all generic motion events before they are dispatched to the 3305 * window. Be sure to call this implementation for generic motion events 3306 * that should be handled normally. 3307 * 3308 * @param ev The generic motion event. 3309 * 3310 * @return boolean Return true if this event was consumed. 3311 */ 3312 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 3313 onUserInteraction(); 3314 if (getWindow().superDispatchGenericMotionEvent(ev)) { 3315 return true; 3316 } 3317 return onGenericMotionEvent(ev); 3318 } 3319 3320 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 3321 event.setClassName(getClass().getName()); 3322 event.setPackageName(getPackageName()); 3323 3324 LayoutParams params = getWindow().getAttributes(); 3325 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 3326 (params.height == LayoutParams.MATCH_PARENT); 3327 event.setFullScreen(isFullScreen); 3328 3329 CharSequence title = getTitle(); 3330 if (!TextUtils.isEmpty(title)) { 3331 event.getText().add(title); 3332 } 3333 3334 return true; 3335 } 3336 3337 /** 3338 * Default implementation of 3339 * {@link android.view.Window.Callback#onCreatePanelView} 3340 * for activities. This 3341 * simply returns null so that all panel sub-windows will have the default 3342 * menu behavior. 3343 */ 3344 @Nullable 3345 public View onCreatePanelView(int featureId) { 3346 return null; 3347 } 3348 3349 /** 3350 * Default implementation of 3351 * {@link android.view.Window.Callback#onCreatePanelMenu} 3352 * for activities. This calls through to the new 3353 * {@link #onCreateOptionsMenu} method for the 3354 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 3355 * so that subclasses of Activity don't need to deal with feature codes. 3356 */ 3357 public boolean onCreatePanelMenu(int featureId, Menu menu) { 3358 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 3359 boolean show = onCreateOptionsMenu(menu); 3360 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 3361 return show; 3362 } 3363 return false; 3364 } 3365 3366 /** 3367 * Default implementation of 3368 * {@link android.view.Window.Callback#onPreparePanel} 3369 * for activities. This 3370 * calls through to the new {@link #onPrepareOptionsMenu} method for the 3371 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 3372 * panel, so that subclasses of 3373 * Activity don't need to deal with feature codes. 3374 */ 3375 public boolean onPreparePanel(int featureId, View view, Menu menu) { 3376 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 3377 boolean goforit = onPrepareOptionsMenu(menu); 3378 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 3379 return goforit; 3380 } 3381 return true; 3382 } 3383 3384 /** 3385 * {@inheritDoc} 3386 * 3387 * @return The default implementation returns true. 3388 */ 3389 public boolean onMenuOpened(int featureId, Menu menu) { 3390 if (featureId == Window.FEATURE_ACTION_BAR) { 3391 initWindowDecorActionBar(); 3392 if (mActionBar != null) { 3393 mActionBar.dispatchMenuVisibilityChanged(true); 3394 } else { 3395 Log.e(TAG, "Tried to open action bar menu with no action bar"); 3396 } 3397 } 3398 return true; 3399 } 3400 3401 /** 3402 * Default implementation of 3403 * {@link android.view.Window.Callback#onMenuItemSelected} 3404 * for activities. This calls through to the new 3405 * {@link #onOptionsItemSelected} method for the 3406 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 3407 * panel, so that subclasses of 3408 * Activity don't need to deal with feature codes. 3409 */ 3410 public boolean onMenuItemSelected(int featureId, MenuItem item) { 3411 CharSequence titleCondensed = item.getTitleCondensed(); 3412 3413 switch (featureId) { 3414 case Window.FEATURE_OPTIONS_PANEL: 3415 // Put event logging here so it gets called even if subclass 3416 // doesn't call through to superclass's implmeentation of each 3417 // of these methods below 3418 if(titleCondensed != null) { 3419 EventLog.writeEvent(50000, 0, titleCondensed.toString()); 3420 } 3421 if (onOptionsItemSelected(item)) { 3422 return true; 3423 } 3424 if (mFragments.dispatchOptionsItemSelected(item)) { 3425 return true; 3426 } 3427 if (item.getItemId() == android.R.id.home && mActionBar != null && 3428 (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) { 3429 if (mParent == null) { 3430 return onNavigateUp(); 3431 } else { 3432 return mParent.onNavigateUpFromChild(this); 3433 } 3434 } 3435 return false; 3436 3437 case Window.FEATURE_CONTEXT_MENU: 3438 if(titleCondensed != null) { 3439 EventLog.writeEvent(50000, 1, titleCondensed.toString()); 3440 } 3441 if (onContextItemSelected(item)) { 3442 return true; 3443 } 3444 return mFragments.dispatchContextItemSelected(item); 3445 3446 default: 3447 return false; 3448 } 3449 } 3450 3451 /** 3452 * Default implementation of 3453 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 3454 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 3455 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 3456 * so that subclasses of Activity don't need to deal with feature codes. 3457 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 3458 * {@link #onContextMenuClosed(Menu)} will be called. 3459 */ 3460 public void onPanelClosed(int featureId, Menu menu) { 3461 switch (featureId) { 3462 case Window.FEATURE_OPTIONS_PANEL: 3463 mFragments.dispatchOptionsMenuClosed(menu); 3464 onOptionsMenuClosed(menu); 3465 break; 3466 3467 case Window.FEATURE_CONTEXT_MENU: 3468 onContextMenuClosed(menu); 3469 break; 3470 3471 case Window.FEATURE_ACTION_BAR: 3472 initWindowDecorActionBar(); 3473 mActionBar.dispatchMenuVisibilityChanged(false); 3474 break; 3475 } 3476 } 3477 3478 /** 3479 * Declare that the options menu has changed, so should be recreated. 3480 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 3481 * time it needs to be displayed. 3482 */ 3483 public void invalidateOptionsMenu() { 3484 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3485 (mActionBar == null || !mActionBar.invalidateOptionsMenu())) { 3486 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 3487 } 3488 } 3489 3490 /** 3491 * Initialize the contents of the Activity's standard options menu. You 3492 * should place your menu items in to <var>menu</var>. 3493 * 3494 * <p>This is only called once, the first time the options menu is 3495 * displayed. To update the menu every time it is displayed, see 3496 * {@link #onPrepareOptionsMenu}. 3497 * 3498 * <p>The default implementation populates the menu with standard system 3499 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 3500 * they will be correctly ordered with application-defined menu items. 3501 * Deriving classes should always call through to the base implementation. 3502 * 3503 * <p>You can safely hold on to <var>menu</var> (and any items created 3504 * from it), making modifications to it as desired, until the next 3505 * time onCreateOptionsMenu() is called. 3506 * 3507 * <p>When you add items to the menu, you can implement the Activity's 3508 * {@link #onOptionsItemSelected} method to handle them there. 3509 * 3510 * @param menu The options menu in which you place your items. 3511 * 3512 * @return You must return true for the menu to be displayed; 3513 * if you return false it will not be shown. 3514 * 3515 * @see #onPrepareOptionsMenu 3516 * @see #onOptionsItemSelected 3517 */ 3518 public boolean onCreateOptionsMenu(Menu menu) { 3519 if (mParent != null) { 3520 return mParent.onCreateOptionsMenu(menu); 3521 } 3522 return true; 3523 } 3524 3525 /** 3526 * Prepare the Screen's standard options menu to be displayed. This is 3527 * called right before the menu is shown, every time it is shown. You can 3528 * use this method to efficiently enable/disable items or otherwise 3529 * dynamically modify the contents. 3530 * 3531 * <p>The default implementation updates the system menu items based on the 3532 * activity's state. Deriving classes should always call through to the 3533 * base class implementation. 3534 * 3535 * @param menu The options menu as last shown or first initialized by 3536 * onCreateOptionsMenu(). 3537 * 3538 * @return You must return true for the menu to be displayed; 3539 * if you return false it will not be shown. 3540 * 3541 * @see #onCreateOptionsMenu 3542 */ 3543 public boolean onPrepareOptionsMenu(Menu menu) { 3544 if (mParent != null) { 3545 return mParent.onPrepareOptionsMenu(menu); 3546 } 3547 return true; 3548 } 3549 3550 /** 3551 * This hook is called whenever an item in your options menu is selected. 3552 * The default implementation simply returns false to have the normal 3553 * processing happen (calling the item's Runnable or sending a message to 3554 * its Handler as appropriate). You can use this method for any items 3555 * for which you would like to do processing without those other 3556 * facilities. 3557 * 3558 * <p>Derived classes should call through to the base class for it to 3559 * perform the default menu handling.</p> 3560 * 3561 * @param item The menu item that was selected. 3562 * 3563 * @return boolean Return false to allow normal menu processing to 3564 * proceed, true to consume it here. 3565 * 3566 * @see #onCreateOptionsMenu 3567 */ 3568 public boolean onOptionsItemSelected(MenuItem item) { 3569 if (mParent != null) { 3570 return mParent.onOptionsItemSelected(item); 3571 } 3572 return false; 3573 } 3574 3575 /** 3576 * This method is called whenever the user chooses to navigate Up within your application's 3577 * activity hierarchy from the action bar. 3578 * 3579 * <p>If the attribute {@link android.R.attr#parentActivityName parentActivityName} 3580 * was specified in the manifest for this activity or an activity-alias to it, 3581 * default Up navigation will be handled automatically. If any activity 3582 * along the parent chain requires extra Intent arguments, the Activity subclass 3583 * should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)} 3584 * to supply those arguments.</p> 3585 * 3586 * <p>See <a href="{@docRoot}guide/components/tasks-and-back-stack.html">Tasks and Back Stack</a> 3587 * from the developer guide and <a href="{@docRoot}design/patterns/navigation.html">Navigation</a> 3588 * from the design guide for more information about navigating within your app.</p> 3589 * 3590 * <p>See the {@link TaskStackBuilder} class and the Activity methods 3591 * {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and 3592 * {@link #navigateUpTo(Intent)} for help implementing custom Up navigation. 3593 * The AppNavigation sample application in the Android SDK is also available for reference.</p> 3594 * 3595 * @return true if Up navigation completed successfully and this Activity was finished, 3596 * false otherwise. 3597 */ 3598 public boolean onNavigateUp() { 3599 // Automatically handle hierarchical Up navigation if the proper 3600 // metadata is available. 3601 Intent upIntent = getParentActivityIntent(); 3602 if (upIntent != null) { 3603 if (mActivityInfo.taskAffinity == null) { 3604 // Activities with a null affinity are special; they really shouldn't 3605 // specify a parent activity intent in the first place. Just finish 3606 // the current activity and call it a day. 3607 finish(); 3608 } else if (shouldUpRecreateTask(upIntent)) { 3609 TaskStackBuilder b = TaskStackBuilder.create(this); 3610 onCreateNavigateUpTaskStack(b); 3611 onPrepareNavigateUpTaskStack(b); 3612 b.startActivities(); 3613 3614 // We can't finishAffinity if we have a result. 3615 // Fall back and simply finish the current activity instead. 3616 if (mResultCode != RESULT_CANCELED || mResultData != null) { 3617 // Tell the developer what's going on to avoid hair-pulling. 3618 Log.i(TAG, "onNavigateUp only finishing topmost activity to return a result"); 3619 finish(); 3620 } else { 3621 finishAffinity(); 3622 } 3623 } else { 3624 navigateUpTo(upIntent); 3625 } 3626 return true; 3627 } 3628 return false; 3629 } 3630 3631 /** 3632 * This is called when a child activity of this one attempts to navigate up. 3633 * The default implementation simply calls onNavigateUp() on this activity (the parent). 3634 * 3635 * @param child The activity making the call. 3636 */ 3637 public boolean onNavigateUpFromChild(Activity child) { 3638 return onNavigateUp(); 3639 } 3640 3641 /** 3642 * Define the synthetic task stack that will be generated during Up navigation from 3643 * a different task. 3644 * 3645 * <p>The default implementation of this method adds the parent chain of this activity 3646 * as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications 3647 * may choose to override this method to construct the desired task stack in a different 3648 * way.</p> 3649 * 3650 * <p>This method will be invoked by the default implementation of {@link #onNavigateUp()} 3651 * if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent 3652 * returned by {@link #getParentActivityIntent()}.</p> 3653 * 3654 * <p>Applications that wish to supply extra Intent parameters to the parent stack defined 3655 * by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}.</p> 3656 * 3657 * @param builder An empty TaskStackBuilder - the application should add intents representing 3658 * the desired task stack 3659 */ 3660 public void onCreateNavigateUpTaskStack(TaskStackBuilder builder) { 3661 builder.addParentStack(this); 3662 } 3663 3664 /** 3665 * Prepare the synthetic task stack that will be generated during Up navigation 3666 * from a different task. 3667 * 3668 * <p>This method receives the {@link TaskStackBuilder} with the constructed series of 3669 * Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}. 3670 * If any extra data should be added to these intents before launching the new task, 3671 * the application should override this method and add that data here.</p> 3672 * 3673 * @param builder A TaskStackBuilder that has been populated with Intents by 3674 * onCreateNavigateUpTaskStack. 3675 */ 3676 public void onPrepareNavigateUpTaskStack(TaskStackBuilder builder) { 3677 } 3678 3679 /** 3680 * This hook is called whenever the options menu is being closed (either by the user canceling 3681 * the menu with the back/menu button, or when an item is selected). 3682 * 3683 * @param menu The options menu as last shown or first initialized by 3684 * onCreateOptionsMenu(). 3685 */ 3686 public void onOptionsMenuClosed(Menu menu) { 3687 if (mParent != null) { 3688 mParent.onOptionsMenuClosed(menu); 3689 } 3690 } 3691 3692 /** 3693 * Programmatically opens the options menu. If the options menu is already 3694 * open, this method does nothing. 3695 */ 3696 public void openOptionsMenu() { 3697 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3698 (mActionBar == null || !mActionBar.openOptionsMenu())) { 3699 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 3700 } 3701 } 3702 3703 /** 3704 * Progammatically closes the options menu. If the options menu is already 3705 * closed, this method does nothing. 3706 */ 3707 public void closeOptionsMenu() { 3708 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3709 (mActionBar == null || !mActionBar.closeOptionsMenu())) { 3710 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 3711 } 3712 } 3713 3714 /** 3715 * Called when a context menu for the {@code view} is about to be shown. 3716 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 3717 * time the context menu is about to be shown and should be populated for 3718 * the view (or item inside the view for {@link AdapterView} subclasses, 3719 * this can be found in the {@code menuInfo})). 3720 * <p> 3721 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 3722 * item has been selected. 3723 * <p> 3724 * It is not safe to hold onto the context menu after this method returns. 3725 * 3726 */ 3727 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 3728 } 3729 3730 /** 3731 * Registers a context menu to be shown for the given view (multiple views 3732 * can show the context menu). This method will set the 3733 * {@link OnCreateContextMenuListener} on the view to this activity, so 3734 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 3735 * called when it is time to show the context menu. 3736 * 3737 * @see #unregisterForContextMenu(View) 3738 * @param view The view that should show a context menu. 3739 */ 3740 public void registerForContextMenu(View view) { 3741 view.setOnCreateContextMenuListener(this); 3742 } 3743 3744 /** 3745 * Prevents a context menu to be shown for the given view. This method will remove the 3746 * {@link OnCreateContextMenuListener} on the view. 3747 * 3748 * @see #registerForContextMenu(View) 3749 * @param view The view that should stop showing a context menu. 3750 */ 3751 public void unregisterForContextMenu(View view) { 3752 view.setOnCreateContextMenuListener(null); 3753 } 3754 3755 /** 3756 * Programmatically opens the context menu for a particular {@code view}. 3757 * The {@code view} should have been added via 3758 * {@link #registerForContextMenu(View)}. 3759 * 3760 * @param view The view to show the context menu for. 3761 */ 3762 public void openContextMenu(View view) { 3763 view.showContextMenu(); 3764 } 3765 3766 /** 3767 * Programmatically closes the most recently opened context menu, if showing. 3768 */ 3769 public void closeContextMenu() { 3770 if (mWindow.hasFeature(Window.FEATURE_CONTEXT_MENU)) { 3771 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 3772 } 3773 } 3774 3775 /** 3776 * This hook is called whenever an item in a context menu is selected. The 3777 * default implementation simply returns false to have the normal processing 3778 * happen (calling the item's Runnable or sending a message to its Handler 3779 * as appropriate). You can use this method for any items for which you 3780 * would like to do processing without those other facilities. 3781 * <p> 3782 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 3783 * View that added this menu item. 3784 * <p> 3785 * Derived classes should call through to the base class for it to perform 3786 * the default menu handling. 3787 * 3788 * @param item The context menu item that was selected. 3789 * @return boolean Return false to allow normal context menu processing to 3790 * proceed, true to consume it here. 3791 */ 3792 public boolean onContextItemSelected(MenuItem item) { 3793 if (mParent != null) { 3794 return mParent.onContextItemSelected(item); 3795 } 3796 return false; 3797 } 3798 3799 /** 3800 * This hook is called whenever the context menu is being closed (either by 3801 * the user canceling the menu with the back/menu button, or when an item is 3802 * selected). 3803 * 3804 * @param menu The context menu that is being closed. 3805 */ 3806 public void onContextMenuClosed(Menu menu) { 3807 if (mParent != null) { 3808 mParent.onContextMenuClosed(menu); 3809 } 3810 } 3811 3812 /** 3813 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 3814 */ 3815 @Deprecated 3816 protected Dialog onCreateDialog(int id) { 3817 return null; 3818 } 3819 3820 /** 3821 * Callback for creating dialogs that are managed (saved and restored) for you 3822 * by the activity. The default implementation calls through to 3823 * {@link #onCreateDialog(int)} for compatibility. 3824 * 3825 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3826 * or later, consider instead using a {@link DialogFragment} instead.</em> 3827 * 3828 * <p>If you use {@link #showDialog(int)}, the activity will call through to 3829 * this method the first time, and hang onto it thereafter. Any dialog 3830 * that is created by this method will automatically be saved and restored 3831 * for you, including whether it is showing. 3832 * 3833 * <p>If you would like the activity to manage saving and restoring dialogs 3834 * for you, you should override this method and handle any ids that are 3835 * passed to {@link #showDialog}. 3836 * 3837 * <p>If you would like an opportunity to prepare your dialog before it is shown, 3838 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 3839 * 3840 * @param id The id of the dialog. 3841 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3842 * @return The dialog. If you return null, the dialog will not be created. 3843 * 3844 * @see #onPrepareDialog(int, Dialog, Bundle) 3845 * @see #showDialog(int, Bundle) 3846 * @see #dismissDialog(int) 3847 * @see #removeDialog(int) 3848 * 3849 * @deprecated Use the new {@link DialogFragment} class with 3850 * {@link FragmentManager} instead; this is also 3851 * available on older platforms through the Android compatibility package. 3852 */ 3853 @Nullable 3854 @Deprecated 3855 protected Dialog onCreateDialog(int id, Bundle args) { 3856 return onCreateDialog(id); 3857 } 3858 3859 /** 3860 * @deprecated Old no-arguments version of 3861 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 3862 */ 3863 @Deprecated 3864 protected void onPrepareDialog(int id, Dialog dialog) { 3865 dialog.setOwnerActivity(this); 3866 } 3867 3868 /** 3869 * Provides an opportunity to prepare a managed dialog before it is being 3870 * shown. The default implementation calls through to 3871 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 3872 * 3873 * <p> 3874 * Override this if you need to update a managed dialog based on the state 3875 * of the application each time it is shown. For example, a time picker 3876 * dialog might want to be updated with the current time. You should call 3877 * through to the superclass's implementation. The default implementation 3878 * will set this Activity as the owner activity on the Dialog. 3879 * 3880 * @param id The id of the managed dialog. 3881 * @param dialog The dialog. 3882 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3883 * @see #onCreateDialog(int, Bundle) 3884 * @see #showDialog(int) 3885 * @see #dismissDialog(int) 3886 * @see #removeDialog(int) 3887 * 3888 * @deprecated Use the new {@link DialogFragment} class with 3889 * {@link FragmentManager} instead; this is also 3890 * available on older platforms through the Android compatibility package. 3891 */ 3892 @Deprecated 3893 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 3894 onPrepareDialog(id, dialog); 3895 } 3896 3897 /** 3898 * Simple version of {@link #showDialog(int, Bundle)} that does not 3899 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 3900 * with null arguments. 3901 * 3902 * @deprecated Use the new {@link DialogFragment} class with 3903 * {@link FragmentManager} instead; this is also 3904 * available on older platforms through the Android compatibility package. 3905 */ 3906 @Deprecated 3907 public final void showDialog(int id) { 3908 showDialog(id, null); 3909 } 3910 3911 /** 3912 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 3913 * will be made with the same id the first time this is called for a given 3914 * id. From thereafter, the dialog will be automatically saved and restored. 3915 * 3916 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3917 * or later, consider instead using a {@link DialogFragment} instead.</em> 3918 * 3919 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 3920 * be made to provide an opportunity to do any timely preparation. 3921 * 3922 * @param id The id of the managed dialog. 3923 * @param args Arguments to pass through to the dialog. These will be saved 3924 * and restored for you. Note that if the dialog is already created, 3925 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 3926 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 3927 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 3928 * @return Returns true if the Dialog was created; false is returned if 3929 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 3930 * 3931 * @see Dialog 3932 * @see #onCreateDialog(int, Bundle) 3933 * @see #onPrepareDialog(int, Dialog, Bundle) 3934 * @see #dismissDialog(int) 3935 * @see #removeDialog(int) 3936 * 3937 * @deprecated Use the new {@link DialogFragment} class with 3938 * {@link FragmentManager} instead; this is also 3939 * available on older platforms through the Android compatibility package. 3940 */ 3941 @Deprecated 3942 public final boolean showDialog(int id, Bundle args) { 3943 if (mManagedDialogs == null) { 3944 mManagedDialogs = new SparseArray<ManagedDialog>(); 3945 } 3946 ManagedDialog md = mManagedDialogs.get(id); 3947 if (md == null) { 3948 md = new ManagedDialog(); 3949 md.mDialog = createDialog(id, null, args); 3950 if (md.mDialog == null) { 3951 return false; 3952 } 3953 mManagedDialogs.put(id, md); 3954 } 3955 3956 md.mArgs = args; 3957 onPrepareDialog(id, md.mDialog, args); 3958 md.mDialog.show(); 3959 return true; 3960 } 3961 3962 /** 3963 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 3964 * 3965 * @param id The id of the managed dialog. 3966 * 3967 * @throws IllegalArgumentException if the id was not previously shown via 3968 * {@link #showDialog(int)}. 3969 * 3970 * @see #onCreateDialog(int, Bundle) 3971 * @see #onPrepareDialog(int, Dialog, Bundle) 3972 * @see #showDialog(int) 3973 * @see #removeDialog(int) 3974 * 3975 * @deprecated Use the new {@link DialogFragment} class with 3976 * {@link FragmentManager} instead; this is also 3977 * available on older platforms through the Android compatibility package. 3978 */ 3979 @Deprecated 3980 public final void dismissDialog(int id) { 3981 if (mManagedDialogs == null) { 3982 throw missingDialog(id); 3983 } 3984 3985 final ManagedDialog md = mManagedDialogs.get(id); 3986 if (md == null) { 3987 throw missingDialog(id); 3988 } 3989 md.mDialog.dismiss(); 3990 } 3991 3992 /** 3993 * Creates an exception to throw if a user passed in a dialog id that is 3994 * unexpected. 3995 */ 3996 private IllegalArgumentException missingDialog(int id) { 3997 return new IllegalArgumentException("no dialog with id " + id + " was ever " 3998 + "shown via Activity#showDialog"); 3999 } 4000 4001 /** 4002 * Removes any internal references to a dialog managed by this Activity. 4003 * If the dialog is showing, it will dismiss it as part of the clean up. 4004 * 4005 * <p>This can be useful if you know that you will never show a dialog again and 4006 * want to avoid the overhead of saving and restoring it in the future. 4007 * 4008 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 4009 * will not throw an exception if you try to remove an ID that does not 4010 * currently have an associated dialog.</p> 4011 * 4012 * @param id The id of the managed dialog. 4013 * 4014 * @see #onCreateDialog(int, Bundle) 4015 * @see #onPrepareDialog(int, Dialog, Bundle) 4016 * @see #showDialog(int) 4017 * @see #dismissDialog(int) 4018 * 4019 * @deprecated Use the new {@link DialogFragment} class with 4020 * {@link FragmentManager} instead; this is also 4021 * available on older platforms through the Android compatibility package. 4022 */ 4023 @Deprecated 4024 public final void removeDialog(int id) { 4025 if (mManagedDialogs != null) { 4026 final ManagedDialog md = mManagedDialogs.get(id); 4027 if (md != null) { 4028 md.mDialog.dismiss(); 4029 mManagedDialogs.remove(id); 4030 } 4031 } 4032 } 4033 4034 /** 4035 * This hook is called when the user signals the desire to start a search. 4036 * 4037 * <p>You can use this function as a simple way to launch the search UI, in response to a 4038 * menu item, search button, or other widgets within your activity. Unless overidden, 4039 * calling this function is the same as calling 4040 * {@link #startSearch startSearch(null, false, null, false)}, which launches 4041 * search for the current activity as specified in its manifest, see {@link SearchManager}. 4042 * 4043 * <p>You can override this function to force global search, e.g. in response to a dedicated 4044 * search key, or to block search entirely (by simply returning false). 4045 * 4046 * <p>Note: when running in a {@link Configuration#UI_MODE_TYPE_TELEVISION}, the default 4047 * implementation changes to simply return false and you must supply your own custom 4048 * implementation if you want to support search.</p> 4049 * 4050 * @param searchEvent The {@link SearchEvent} that signaled this search. 4051 * @return Returns {@code true} if search launched, and {@code false} if the activity does 4052 * not respond to search. The default implementation always returns {@code true}, except 4053 * when in {@link Configuration#UI_MODE_TYPE_TELEVISION} mode where it returns false. 4054 * 4055 * @see android.app.SearchManager 4056 */ 4057 public boolean onSearchRequested(@Nullable SearchEvent searchEvent) { 4058 mSearchEvent = searchEvent; 4059 boolean result = onSearchRequested(); 4060 mSearchEvent = null; 4061 return result; 4062 } 4063 4064 /** 4065 * @see #onSearchRequested(SearchEvent) 4066 */ 4067 public boolean onSearchRequested() { 4068 if ((getResources().getConfiguration().uiMode&Configuration.UI_MODE_TYPE_MASK) 4069 != Configuration.UI_MODE_TYPE_TELEVISION) { 4070 startSearch(null, false, null, false); 4071 return true; 4072 } else { 4073 return false; 4074 } 4075 } 4076 4077 /** 4078 * During the onSearchRequested() callbacks, this function will return the 4079 * {@link SearchEvent} that triggered the callback, if it exists. 4080 * 4081 * @return SearchEvent The SearchEvent that triggered the {@link 4082 * #onSearchRequested} callback. 4083 */ 4084 public final SearchEvent getSearchEvent() { 4085 return mSearchEvent; 4086 } 4087 4088 /** 4089 * This hook is called to launch the search UI. 4090 * 4091 * <p>It is typically called from onSearchRequested(), either directly from 4092 * Activity.onSearchRequested() or from an overridden version in any given 4093 * Activity. If your goal is simply to activate search, it is preferred to call 4094 * onSearchRequested(), which may have been overridden elsewhere in your Activity. If your goal 4095 * is to inject specific data such as context data, it is preferred to <i>override</i> 4096 * onSearchRequested(), so that any callers to it will benefit from the override. 4097 * 4098 * @param initialQuery Any non-null non-empty string will be inserted as 4099 * pre-entered text in the search query box. 4100 * @param selectInitialQuery If true, the initial query will be preselected, which means that 4101 * any further typing will replace it. This is useful for cases where an entire pre-formed 4102 * query is being inserted. If false, the selection point will be placed at the end of the 4103 * inserted query. This is useful when the inserted query is text that the user entered, 4104 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 4105 * if initialQuery is a non-empty string.</i> 4106 * @param appSearchData An application can insert application-specific 4107 * context here, in order to improve quality or specificity of its own 4108 * searches. This data will be returned with SEARCH intent(s). Null if 4109 * no extra data is required. 4110 * @param globalSearch If false, this will only launch the search that has been specifically 4111 * defined by the application (which is usually defined as a local search). If no default 4112 * search is defined in the current application or activity, global search will be launched. 4113 * If true, this will always launch a platform-global (e.g. web-based) search instead. 4114 * 4115 * @see android.app.SearchManager 4116 * @see #onSearchRequested 4117 */ 4118 public void startSearch(@Nullable String initialQuery, boolean selectInitialQuery, 4119 @Nullable Bundle appSearchData, boolean globalSearch) { 4120 ensureSearchManager(); 4121 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 4122 appSearchData, globalSearch); 4123 } 4124 4125 /** 4126 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 4127 * the search dialog. Made available for testing purposes. 4128 * 4129 * @param query The query to trigger. If empty, the request will be ignored. 4130 * @param appSearchData An application can insert application-specific 4131 * context here, in order to improve quality or specificity of its own 4132 * searches. This data will be returned with SEARCH intent(s). Null if 4133 * no extra data is required. 4134 */ 4135 public void triggerSearch(String query, @Nullable Bundle appSearchData) { 4136 ensureSearchManager(); 4137 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 4138 } 4139 4140 /** 4141 * Request that key events come to this activity. Use this if your 4142 * activity has no views with focus, but the activity still wants 4143 * a chance to process key events. 4144 * 4145 * @see android.view.Window#takeKeyEvents 4146 */ 4147 public void takeKeyEvents(boolean get) { 4148 getWindow().takeKeyEvents(get); 4149 } 4150 4151 /** 4152 * Enable extended window features. This is a convenience for calling 4153 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 4154 * 4155 * @param featureId The desired feature as defined in 4156 * {@link android.view.Window}. 4157 * @return Returns true if the requested feature is supported and now 4158 * enabled. 4159 * 4160 * @see android.view.Window#requestFeature 4161 */ 4162 public final boolean requestWindowFeature(int featureId) { 4163 return getWindow().requestFeature(featureId); 4164 } 4165 4166 /** 4167 * Convenience for calling 4168 * {@link android.view.Window#setFeatureDrawableResource}. 4169 */ 4170 public final void setFeatureDrawableResource(int featureId, @DrawableRes int resId) { 4171 getWindow().setFeatureDrawableResource(featureId, resId); 4172 } 4173 4174 /** 4175 * Convenience for calling 4176 * {@link android.view.Window#setFeatureDrawableUri}. 4177 */ 4178 public final void setFeatureDrawableUri(int featureId, Uri uri) { 4179 getWindow().setFeatureDrawableUri(featureId, uri); 4180 } 4181 4182 /** 4183 * Convenience for calling 4184 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 4185 */ 4186 public final void setFeatureDrawable(int featureId, Drawable drawable) { 4187 getWindow().setFeatureDrawable(featureId, drawable); 4188 } 4189 4190 /** 4191 * Convenience for calling 4192 * {@link android.view.Window#setFeatureDrawableAlpha}. 4193 */ 4194 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 4195 getWindow().setFeatureDrawableAlpha(featureId, alpha); 4196 } 4197 4198 /** 4199 * Convenience for calling 4200 * {@link android.view.Window#getLayoutInflater}. 4201 */ 4202 @NonNull 4203 public LayoutInflater getLayoutInflater() { 4204 return getWindow().getLayoutInflater(); 4205 } 4206 4207 /** 4208 * Returns a {@link MenuInflater} with this context. 4209 */ 4210 @NonNull 4211 public MenuInflater getMenuInflater() { 4212 // Make sure that action views can get an appropriate theme. 4213 if (mMenuInflater == null) { 4214 initWindowDecorActionBar(); 4215 if (mActionBar != null) { 4216 mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this); 4217 } else { 4218 mMenuInflater = new MenuInflater(this); 4219 } 4220 } 4221 return mMenuInflater; 4222 } 4223 4224 @Override 4225 public void setTheme(int resid) { 4226 super.setTheme(resid); 4227 mWindow.setTheme(resid); 4228 } 4229 4230 @Override 4231 protected void onApplyThemeResource(Resources.Theme theme, @StyleRes int resid, 4232 boolean first) { 4233 if (mParent == null) { 4234 super.onApplyThemeResource(theme, resid, first); 4235 } else { 4236 try { 4237 theme.setTo(mParent.getTheme()); 4238 } catch (Exception e) { 4239 // Empty 4240 } 4241 theme.applyStyle(resid, false); 4242 } 4243 4244 // Get the primary color and update the TaskDescription for this activity 4245 TypedArray a = theme.obtainStyledAttributes( 4246 com.android.internal.R.styleable.ActivityTaskDescription); 4247 if (mTaskDescription.getPrimaryColor() == 0) { 4248 int colorPrimary = a.getColor( 4249 com.android.internal.R.styleable.ActivityTaskDescription_colorPrimary, 0); 4250 if (colorPrimary != 0 && Color.alpha(colorPrimary) == 0xFF) { 4251 mTaskDescription.setPrimaryColor(colorPrimary); 4252 } 4253 } 4254 4255 int colorBackground = a.getColor( 4256 com.android.internal.R.styleable.ActivityTaskDescription_colorBackground, 0); 4257 if (colorBackground != 0 && Color.alpha(colorBackground) == 0xFF) { 4258 mTaskDescription.setBackgroundColor(colorBackground); 4259 } 4260 4261 final int statusBarColor = a.getColor( 4262 com.android.internal.R.styleable.ActivityTaskDescription_statusBarColor, 0); 4263 if (statusBarColor != 0) { 4264 mTaskDescription.setStatusBarColor(statusBarColor); 4265 } 4266 4267 final int navigationBarColor = a.getColor( 4268 com.android.internal.R.styleable.ActivityTaskDescription_navigationBarColor, 0); 4269 if (navigationBarColor != 0) { 4270 mTaskDescription.setNavigationBarColor(navigationBarColor); 4271 } 4272 4273 a.recycle(); 4274 setTaskDescription(mTaskDescription); 4275 } 4276 4277 /** 4278 * Requests permissions to be granted to this application. These permissions 4279 * must be requested in your manifest, they should not be granted to your app, 4280 * and they should have protection level {@link android.content.pm.PermissionInfo 4281 * #PROTECTION_DANGEROUS dangerous}, regardless whether they are declared by 4282 * the platform or a third-party app. 4283 * <p> 4284 * Normal permissions {@link android.content.pm.PermissionInfo#PROTECTION_NORMAL} 4285 * are granted at install time if requested in the manifest. Signature permissions 4286 * {@link android.content.pm.PermissionInfo#PROTECTION_SIGNATURE} are granted at 4287 * install time if requested in the manifest and the signature of your app matches 4288 * the signature of the app declaring the permissions. 4289 * </p> 4290 * <p> 4291 * If your app does not have the requested permissions the user will be presented 4292 * with UI for accepting them. After the user has accepted or rejected the 4293 * requested permissions you will receive a callback on {@link 4294 * #onRequestPermissionsResult(int, String[], int[])} reporting whether the 4295 * permissions were granted or not. 4296 * </p> 4297 * <p> 4298 * Note that requesting a permission does not guarantee it will be granted and 4299 * your app should be able to run without having this permission. 4300 * </p> 4301 * <p> 4302 * This method may start an activity allowing the user to choose which permissions 4303 * to grant and which to reject. Hence, you should be prepared that your activity 4304 * may be paused and resumed. Further, granting some permissions may require 4305 * a restart of you application. In such a case, the system will recreate the 4306 * activity stack before delivering the result to {@link 4307 * #onRequestPermissionsResult(int, String[], int[])}. 4308 * </p> 4309 * <p> 4310 * When checking whether you have a permission you should use {@link 4311 * #checkSelfPermission(String)}. 4312 * </p> 4313 * <p> 4314 * Calling this API for permissions already granted to your app would show UI 4315 * to the user to decide whether the app can still hold these permissions. This 4316 * can be useful if the way your app uses data guarded by the permissions 4317 * changes significantly. 4318 * </p> 4319 * <p> 4320 * You cannot request a permission if your activity sets {@link 4321 * android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 4322 * <code>true</code> because in this case the activity would not receive 4323 * result callbacks including {@link #onRequestPermissionsResult(int, String[], int[])}. 4324 * </p> 4325 * <p> 4326 * The <a href="http://developer.android.com/samples/RuntimePermissions/index.html"> 4327 * RuntimePermissions</a> sample app demonstrates how to use this method to 4328 * request permissions at run time. 4329 * </p> 4330 * 4331 * @param permissions The requested permissions. Must me non-null and not empty. 4332 * @param requestCode Application specific request code to match with a result 4333 * reported to {@link #onRequestPermissionsResult(int, String[], int[])}. 4334 * Should be >= 0. 4335 * 4336 * @throws IllegalArgumentException if requestCode is negative. 4337 * 4338 * @see #onRequestPermissionsResult(int, String[], int[]) 4339 * @see #checkSelfPermission(String) 4340 * @see #shouldShowRequestPermissionRationale(String) 4341 */ 4342 public final void requestPermissions(@NonNull String[] permissions, int requestCode) { 4343 if (requestCode < 0) { 4344 throw new IllegalArgumentException("requestCode should be >= 0"); 4345 } 4346 if (mHasCurrentPermissionsRequest) { 4347 Log.w(TAG, "Can reqeust only one set of permissions at a time"); 4348 // Dispatch the callback with empty arrays which means a cancellation. 4349 onRequestPermissionsResult(requestCode, new String[0], new int[0]); 4350 return; 4351 } 4352 Intent intent = getPackageManager().buildRequestPermissionsIntent(permissions); 4353 startActivityForResult(REQUEST_PERMISSIONS_WHO_PREFIX, intent, requestCode, null); 4354 mHasCurrentPermissionsRequest = true; 4355 } 4356 4357 /** 4358 * Callback for the result from requesting permissions. This method 4359 * is invoked for every call on {@link #requestPermissions(String[], int)}. 4360 * <p> 4361 * <strong>Note:</strong> It is possible that the permissions request interaction 4362 * with the user is interrupted. In this case you will receive empty permissions 4363 * and results arrays which should be treated as a cancellation. 4364 * </p> 4365 * 4366 * @param requestCode The request code passed in {@link #requestPermissions(String[], int)}. 4367 * @param permissions The requested permissions. Never null. 4368 * @param grantResults The grant results for the corresponding permissions 4369 * which is either {@link android.content.pm.PackageManager#PERMISSION_GRANTED} 4370 * or {@link android.content.pm.PackageManager#PERMISSION_DENIED}. Never null. 4371 * 4372 * @see #requestPermissions(String[], int) 4373 */ 4374 public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, 4375 @NonNull int[] grantResults) { 4376 /* callback - no nothing */ 4377 } 4378 4379 /** 4380 * Gets whether you should show UI with rationale for requesting a permission. 4381 * You should do this only if you do not have the permission and the context in 4382 * which the permission is requested does not clearly communicate to the user 4383 * what would be the benefit from granting this permission. 4384 * <p> 4385 * For example, if you write a camera app, requesting the camera permission 4386 * would be expected by the user and no rationale for why it is requested is 4387 * needed. If however, the app needs location for tagging photos then a non-tech 4388 * savvy user may wonder how location is related to taking photos. In this case 4389 * you may choose to show UI with rationale of requesting this permission. 4390 * </p> 4391 * 4392 * @param permission A permission your app wants to request. 4393 * @return Whether you can show permission rationale UI. 4394 * 4395 * @see #checkSelfPermission(String) 4396 * @see #requestPermissions(String[], int) 4397 * @see #onRequestPermissionsResult(int, String[], int[]) 4398 */ 4399 public boolean shouldShowRequestPermissionRationale(@NonNull String permission) { 4400 return getPackageManager().shouldShowRequestPermissionRationale(permission); 4401 } 4402 4403 /** 4404 * Same as calling {@link #startActivityForResult(Intent, int, Bundle)} 4405 * with no options. 4406 * 4407 * @param intent The intent to start. 4408 * @param requestCode If >= 0, this code will be returned in 4409 * onActivityResult() when the activity exits. 4410 * 4411 * @throws android.content.ActivityNotFoundException 4412 * 4413 * @see #startActivity 4414 */ 4415 public void startActivityForResult(@RequiresPermission Intent intent, int requestCode) { 4416 startActivityForResult(intent, requestCode, null); 4417 } 4418 4419 /** 4420 * Launch an activity for which you would like a result when it finished. 4421 * When this activity exits, your 4422 * onActivityResult() method will be called with the given requestCode. 4423 * Using a negative requestCode is the same as calling 4424 * {@link #startActivity} (the activity is not launched as a sub-activity). 4425 * 4426 * <p>Note that this method should only be used with Intent protocols 4427 * that are defined to return a result. In other protocols (such as 4428 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 4429 * not get the result when you expect. For example, if the activity you 4430 * are launching uses {@link Intent#FLAG_ACTIVITY_NEW_TASK}, it will not 4431 * run in your task and thus you will immediately receive a cancel result. 4432 * 4433 * <p>As a special case, if you call startActivityForResult() with a requestCode 4434 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 4435 * activity, then your window will not be displayed until a result is 4436 * returned back from the started activity. This is to avoid visible 4437 * flickering when redirecting to another activity. 4438 * 4439 * <p>This method throws {@link android.content.ActivityNotFoundException} 4440 * if there was no Activity found to run the given Intent. 4441 * 4442 * @param intent The intent to start. 4443 * @param requestCode If >= 0, this code will be returned in 4444 * onActivityResult() when the activity exits. 4445 * @param options Additional options for how the Activity should be started. 4446 * See {@link android.content.Context#startActivity(Intent, Bundle)} 4447 * Context.startActivity(Intent, Bundle)} for more details. 4448 * 4449 * @throws android.content.ActivityNotFoundException 4450 * 4451 * @see #startActivity 4452 */ 4453 public void startActivityForResult(@RequiresPermission Intent intent, int requestCode, 4454 @Nullable Bundle options) { 4455 if (mParent == null) { 4456 options = transferSpringboardActivityOptions(options); 4457 Instrumentation.ActivityResult ar = 4458 mInstrumentation.execStartActivity( 4459 this, mMainThread.getApplicationThread(), mToken, this, 4460 intent, requestCode, options); 4461 if (ar != null) { 4462 mMainThread.sendActivityResult( 4463 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 4464 ar.getResultData()); 4465 } 4466 if (requestCode >= 0) { 4467 // If this start is requesting a result, we can avoid making 4468 // the activity visible until the result is received. Setting 4469 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4470 // activity hidden during this time, to avoid flickering. 4471 // This can only be done when a result is requested because 4472 // that guarantees we will get information back when the 4473 // activity is finished, no matter what happens to it. 4474 mStartedActivity = true; 4475 } 4476 4477 cancelInputsAndStartExitTransition(options); 4478 // TODO Consider clearing/flushing other event sources and events for child windows. 4479 } else { 4480 if (options != null) { 4481 mParent.startActivityFromChild(this, intent, requestCode, options); 4482 } else { 4483 // Note we want to go through this method for compatibility with 4484 // existing applications that may have overridden it. 4485 mParent.startActivityFromChild(this, intent, requestCode); 4486 } 4487 } 4488 } 4489 4490 /** 4491 * Cancels pending inputs and if an Activity Transition is to be run, starts the transition. 4492 * 4493 * @param options The ActivityOptions bundle used to start an Activity. 4494 */ 4495 private void cancelInputsAndStartExitTransition(Bundle options) { 4496 final View decor = mWindow != null ? mWindow.peekDecorView() : null; 4497 if (decor != null) { 4498 decor.cancelPendingInputEvents(); 4499 } 4500 if (options != null && !isTopOfTask()) { 4501 mActivityTransitionState.startExitOutTransition(this, options); 4502 } 4503 } 4504 4505 /** 4506 * Returns whether there are any activity transitions currently running on this 4507 * activity. A return value of {@code true} can mean that either an enter or 4508 * exit transition is running, including whether the background of the activity 4509 * is animating as a part of that transition. 4510 * 4511 * @return true if a transition is currently running on this activity, false otherwise. 4512 */ 4513 public boolean isActivityTransitionRunning() { 4514 return mActivityTransitionState.isTransitionRunning(); 4515 } 4516 4517 private Bundle transferSpringboardActivityOptions(Bundle options) { 4518 if (options == null && (mWindow != null && !mWindow.isActive())) { 4519 final ActivityOptions activityOptions = getActivityOptions(); 4520 if (activityOptions != null && 4521 activityOptions.getAnimationType() == ActivityOptions.ANIM_SCENE_TRANSITION) { 4522 return activityOptions.toBundle(); 4523 } 4524 } 4525 return options; 4526 } 4527 4528 /** 4529 * @hide Implement to provide correct calling token. 4530 */ 4531 public void startActivityForResultAsUser(Intent intent, int requestCode, UserHandle user) { 4532 startActivityForResultAsUser(intent, requestCode, null, user); 4533 } 4534 4535 /** 4536 * @hide Implement to provide correct calling token. 4537 */ 4538 public void startActivityForResultAsUser(Intent intent, int requestCode, 4539 @Nullable Bundle options, UserHandle user) { 4540 startActivityForResultAsUser(intent, mEmbeddedID, requestCode, options, user); 4541 } 4542 4543 /** 4544 * @hide Implement to provide correct calling token. 4545 */ 4546 public void startActivityForResultAsUser(Intent intent, String resultWho, int requestCode, 4547 @Nullable Bundle options, UserHandle user) { 4548 if (mParent != null) { 4549 throw new RuntimeException("Can't be called from a child"); 4550 } 4551 options = transferSpringboardActivityOptions(options); 4552 Instrumentation.ActivityResult ar = mInstrumentation.execStartActivity( 4553 this, mMainThread.getApplicationThread(), mToken, resultWho, intent, requestCode, 4554 options, user); 4555 if (ar != null) { 4556 mMainThread.sendActivityResult( 4557 mToken, mEmbeddedID, requestCode, ar.getResultCode(), ar.getResultData()); 4558 } 4559 if (requestCode >= 0) { 4560 // If this start is requesting a result, we can avoid making 4561 // the activity visible until the result is received. Setting 4562 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4563 // activity hidden during this time, to avoid flickering. 4564 // This can only be done when a result is requested because 4565 // that guarantees we will get information back when the 4566 // activity is finished, no matter what happens to it. 4567 mStartedActivity = true; 4568 } 4569 4570 cancelInputsAndStartExitTransition(options); 4571 } 4572 4573 /** 4574 * @hide Implement to provide correct calling token. 4575 */ 4576 public void startActivityAsUser(Intent intent, UserHandle user) { 4577 startActivityAsUser(intent, null, user); 4578 } 4579 4580 /** 4581 * @hide Implement to provide correct calling token. 4582 */ 4583 public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) { 4584 if (mParent != null) { 4585 throw new RuntimeException("Can't be called from a child"); 4586 } 4587 options = transferSpringboardActivityOptions(options); 4588 Instrumentation.ActivityResult ar = 4589 mInstrumentation.execStartActivity( 4590 this, mMainThread.getApplicationThread(), mToken, mEmbeddedID, 4591 intent, -1, options, user); 4592 if (ar != null) { 4593 mMainThread.sendActivityResult( 4594 mToken, mEmbeddedID, -1, ar.getResultCode(), 4595 ar.getResultData()); 4596 } 4597 cancelInputsAndStartExitTransition(options); 4598 } 4599 4600 /** 4601 * Start a new activity as if it was started by the activity that started our 4602 * current activity. This is for the resolver and chooser activities, which operate 4603 * as intermediaries that dispatch their intent to the target the user selects -- to 4604 * do this, they must perform all security checks including permission grants as if 4605 * their launch had come from the original activity. 4606 * @param intent The Intent to start. 4607 * @param options ActivityOptions or null. 4608 * @param ignoreTargetSecurity If true, the activity manager will not check whether the 4609 * caller it is doing the start is, is actually allowed to start the target activity. 4610 * If you set this to true, you must set an explicit component in the Intent and do any 4611 * appropriate security checks yourself. 4612 * @param userId The user the new activity should run as. 4613 * @hide 4614 */ 4615 public void startActivityAsCaller(Intent intent, @Nullable Bundle options, 4616 boolean ignoreTargetSecurity, int userId) { 4617 if (mParent != null) { 4618 throw new RuntimeException("Can't be called from a child"); 4619 } 4620 options = transferSpringboardActivityOptions(options); 4621 Instrumentation.ActivityResult ar = 4622 mInstrumentation.execStartActivityAsCaller( 4623 this, mMainThread.getApplicationThread(), mToken, this, 4624 intent, -1, options, ignoreTargetSecurity, userId); 4625 if (ar != null) { 4626 mMainThread.sendActivityResult( 4627 mToken, mEmbeddedID, -1, ar.getResultCode(), 4628 ar.getResultData()); 4629 } 4630 cancelInputsAndStartExitTransition(options); 4631 } 4632 4633 /** 4634 * Same as calling {@link #startIntentSenderForResult(IntentSender, int, 4635 * Intent, int, int, int, Bundle)} with no options. 4636 * 4637 * @param intent The IntentSender to launch. 4638 * @param requestCode If >= 0, this code will be returned in 4639 * onActivityResult() when the activity exits. 4640 * @param fillInIntent If non-null, this will be provided as the 4641 * intent parameter to {@link IntentSender#sendIntent}. 4642 * @param flagsMask Intent flags in the original IntentSender that you 4643 * would like to change. 4644 * @param flagsValues Desired values for any bits set in 4645 * <var>flagsMask</var> 4646 * @param extraFlags Always set to 0. 4647 */ 4648 public void startIntentSenderForResult(IntentSender intent, int requestCode, 4649 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4650 throws IntentSender.SendIntentException { 4651 startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, 4652 flagsValues, extraFlags, null); 4653 } 4654 4655 /** 4656 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 4657 * to use a IntentSender to describe the activity to be started. If 4658 * the IntentSender is for an activity, that activity will be started 4659 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 4660 * here; otherwise, its associated action will be executed (such as 4661 * sending a broadcast) as if you had called 4662 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 4663 * 4664 * @param intent The IntentSender to launch. 4665 * @param requestCode If >= 0, this code will be returned in 4666 * onActivityResult() when the activity exits. 4667 * @param fillInIntent If non-null, this will be provided as the 4668 * intent parameter to {@link IntentSender#sendIntent}. 4669 * @param flagsMask Intent flags in the original IntentSender that you 4670 * would like to change. 4671 * @param flagsValues Desired values for any bits set in 4672 * <var>flagsMask</var> 4673 * @param extraFlags Always set to 0. 4674 * @param options Additional options for how the Activity should be started. 4675 * See {@link android.content.Context#startActivity(Intent, Bundle)} 4676 * Context.startActivity(Intent, Bundle)} for more details. If options 4677 * have also been supplied by the IntentSender, options given here will 4678 * override any that conflict with those given by the IntentSender. 4679 */ 4680 public void startIntentSenderForResult(IntentSender intent, int requestCode, 4681 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4682 Bundle options) throws IntentSender.SendIntentException { 4683 if (mParent == null) { 4684 startIntentSenderForResultInner(intent, mEmbeddedID, requestCode, fillInIntent, 4685 flagsMask, flagsValues, options); 4686 } else if (options != null) { 4687 mParent.startIntentSenderFromChild(this, intent, requestCode, 4688 fillInIntent, flagsMask, flagsValues, extraFlags, options); 4689 } else { 4690 // Note we want to go through this call for compatibility with 4691 // existing applications that may have overridden the method. 4692 mParent.startIntentSenderFromChild(this, intent, requestCode, 4693 fillInIntent, flagsMask, flagsValues, extraFlags); 4694 } 4695 } 4696 4697 private void startIntentSenderForResultInner(IntentSender intent, String who, int requestCode, 4698 Intent fillInIntent, int flagsMask, int flagsValues, 4699 Bundle options) 4700 throws IntentSender.SendIntentException { 4701 try { 4702 String resolvedType = null; 4703 if (fillInIntent != null) { 4704 fillInIntent.migrateExtraStreamToClipData(); 4705 fillInIntent.prepareToLeaveProcess(this); 4706 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 4707 } 4708 int result = ActivityManager.getService() 4709 .startActivityIntentSender(mMainThread.getApplicationThread(), 4710 intent != null ? intent.getTarget() : null, 4711 intent != null ? intent.getWhitelistToken() : null, 4712 fillInIntent, resolvedType, mToken, who, 4713 requestCode, flagsMask, flagsValues, options); 4714 if (result == ActivityManager.START_CANCELED) { 4715 throw new IntentSender.SendIntentException(); 4716 } 4717 Instrumentation.checkStartActivityResult(result, null); 4718 } catch (RemoteException e) { 4719 } 4720 if (requestCode >= 0) { 4721 // If this start is requesting a result, we can avoid making 4722 // the activity visible until the result is received. Setting 4723 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4724 // activity hidden during this time, to avoid flickering. 4725 // This can only be done when a result is requested because 4726 // that guarantees we will get information back when the 4727 // activity is finished, no matter what happens to it. 4728 mStartedActivity = true; 4729 } 4730 } 4731 4732 /** 4733 * Same as {@link #startActivity(Intent, Bundle)} with no options 4734 * specified. 4735 * 4736 * @param intent The intent to start. 4737 * 4738 * @throws android.content.ActivityNotFoundException 4739 * 4740 * @see #startActivity(Intent, Bundle) 4741 * @see #startActivityForResult 4742 */ 4743 @Override 4744 public void startActivity(Intent intent) { 4745 this.startActivity(intent, null); 4746 } 4747 4748 /** 4749 * Launch a new activity. You will not receive any information about when 4750 * the activity exits. This implementation overrides the base version, 4751 * providing information about 4752 * the activity performing the launch. Because of this additional 4753 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4754 * required; if not specified, the new activity will be added to the 4755 * task of the caller. 4756 * 4757 * <p>This method throws {@link android.content.ActivityNotFoundException} 4758 * if there was no Activity found to run the given Intent. 4759 * 4760 * @param intent The intent to start. 4761 * @param options Additional options for how the Activity should be started. 4762 * See {@link android.content.Context#startActivity(Intent, Bundle)} 4763 * Context.startActivity(Intent, Bundle)} for more details. 4764 * 4765 * @throws android.content.ActivityNotFoundException 4766 * 4767 * @see #startActivity(Intent) 4768 * @see #startActivityForResult 4769 */ 4770 @Override 4771 public void startActivity(Intent intent, @Nullable Bundle options) { 4772 if (options != null) { 4773 startActivityForResult(intent, -1, options); 4774 } else { 4775 // Note we want to go through this call for compatibility with 4776 // applications that may have overridden the method. 4777 startActivityForResult(intent, -1); 4778 } 4779 } 4780 4781 /** 4782 * Same as {@link #startActivities(Intent[], Bundle)} with no options 4783 * specified. 4784 * 4785 * @param intents The intents to start. 4786 * 4787 * @throws android.content.ActivityNotFoundException 4788 * 4789 * @see #startActivities(Intent[], Bundle) 4790 * @see #startActivityForResult 4791 */ 4792 @Override 4793 public void startActivities(Intent[] intents) { 4794 startActivities(intents, null); 4795 } 4796 4797 /** 4798 * Launch a new activity. You will not receive any information about when 4799 * the activity exits. This implementation overrides the base version, 4800 * providing information about 4801 * the activity performing the launch. Because of this additional 4802 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4803 * required; if not specified, the new activity will be added to the 4804 * task of the caller. 4805 * 4806 * <p>This method throws {@link android.content.ActivityNotFoundException} 4807 * if there was no Activity found to run the given Intent. 4808 * 4809 * @param intents The intents to start. 4810 * @param options Additional options for how the Activity should be started. 4811 * See {@link android.content.Context#startActivity(Intent, Bundle)} 4812 * Context.startActivity(Intent, Bundle)} for more details. 4813 * 4814 * @throws android.content.ActivityNotFoundException 4815 * 4816 * @see #startActivities(Intent[]) 4817 * @see #startActivityForResult 4818 */ 4819 @Override 4820 public void startActivities(Intent[] intents, @Nullable Bundle options) { 4821 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 4822 mToken, this, intents, options); 4823 } 4824 4825 /** 4826 * Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 4827 * with no options. 4828 * 4829 * @param intent The IntentSender to launch. 4830 * @param fillInIntent If non-null, this will be provided as the 4831 * intent parameter to {@link IntentSender#sendIntent}. 4832 * @param flagsMask Intent flags in the original IntentSender that you 4833 * would like to change. 4834 * @param flagsValues Desired values for any bits set in 4835 * <var>flagsMask</var> 4836 * @param extraFlags Always set to 0. 4837 */ 4838 public void startIntentSender(IntentSender intent, 4839 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4840 throws IntentSender.SendIntentException { 4841 startIntentSender(intent, fillInIntent, flagsMask, flagsValues, 4842 extraFlags, null); 4843 } 4844 4845 /** 4846 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 4847 * to start; see 4848 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)} 4849 * for more information. 4850 * 4851 * @param intent The IntentSender to launch. 4852 * @param fillInIntent If non-null, this will be provided as the 4853 * intent parameter to {@link IntentSender#sendIntent}. 4854 * @param flagsMask Intent flags in the original IntentSender that you 4855 * would like to change. 4856 * @param flagsValues Desired values for any bits set in 4857 * <var>flagsMask</var> 4858 * @param extraFlags Always set to 0. 4859 * @param options Additional options for how the Activity should be started. 4860 * See {@link android.content.Context#startActivity(Intent, Bundle)} 4861 * Context.startActivity(Intent, Bundle)} for more details. If options 4862 * have also been supplied by the IntentSender, options given here will 4863 * override any that conflict with those given by the IntentSender. 4864 */ 4865 public void startIntentSender(IntentSender intent, 4866 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4867 Bundle options) throws IntentSender.SendIntentException { 4868 if (options != null) { 4869 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4870 flagsValues, extraFlags, options); 4871 } else { 4872 // Note we want to go through this call for compatibility with 4873 // applications that may have overridden the method. 4874 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4875 flagsValues, extraFlags); 4876 } 4877 } 4878 4879 /** 4880 * Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)} 4881 * with no options. 4882 * 4883 * @param intent The intent to start. 4884 * @param requestCode If >= 0, this code will be returned in 4885 * onActivityResult() when the activity exits, as described in 4886 * {@link #startActivityForResult}. 4887 * 4888 * @return If a new activity was launched then true is returned; otherwise 4889 * false is returned and you must handle the Intent yourself. 4890 * 4891 * @see #startActivity 4892 * @see #startActivityForResult 4893 */ 4894 public boolean startActivityIfNeeded(@RequiresPermission @NonNull Intent intent, 4895 int requestCode) { 4896 return startActivityIfNeeded(intent, requestCode, null); 4897 } 4898 4899 /** 4900 * A special variation to launch an activity only if a new activity 4901 * instance is needed to handle the given Intent. In other words, this is 4902 * just like {@link #startActivityForResult(Intent, int)} except: if you are 4903 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 4904 * singleTask or singleTop 4905 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 4906 * and the activity 4907 * that handles <var>intent</var> is the same as your currently running 4908 * activity, then a new instance is not needed. In this case, instead of 4909 * the normal behavior of calling {@link #onNewIntent} this function will 4910 * return and you can handle the Intent yourself. 4911 * 4912 * <p>This function can only be called from a top-level activity; if it is 4913 * called from a child activity, a runtime exception will be thrown. 4914 * 4915 * @param intent The intent to start. 4916 * @param requestCode If >= 0, this code will be returned in 4917 * onActivityResult() when the activity exits, as described in 4918 * {@link #startActivityForResult}. 4919 * @param options Additional options for how the Activity should be started. 4920 * See {@link android.content.Context#startActivity(Intent, Bundle)} 4921 * Context.startActivity(Intent, Bundle)} for more details. 4922 * 4923 * @return If a new activity was launched then true is returned; otherwise 4924 * false is returned and you must handle the Intent yourself. 4925 * 4926 * @see #startActivity 4927 * @see #startActivityForResult 4928 */ 4929 public boolean startActivityIfNeeded(@RequiresPermission @NonNull Intent intent, 4930 int requestCode, @Nullable Bundle options) { 4931 if (mParent == null) { 4932 int result = ActivityManager.START_RETURN_INTENT_TO_CALLER; 4933 try { 4934 Uri referrer = onProvideReferrer(); 4935 if (referrer != null) { 4936 intent.putExtra(Intent.EXTRA_REFERRER, referrer); 4937 } 4938 intent.migrateExtraStreamToClipData(); 4939 intent.prepareToLeaveProcess(this); 4940 result = ActivityManager.getService() 4941 .startActivity(mMainThread.getApplicationThread(), getBasePackageName(), 4942 intent, intent.resolveTypeIfNeeded(getContentResolver()), mToken, 4943 mEmbeddedID, requestCode, ActivityManager.START_FLAG_ONLY_IF_NEEDED, 4944 null, options); 4945 } catch (RemoteException e) { 4946 // Empty 4947 } 4948 4949 Instrumentation.checkStartActivityResult(result, intent); 4950 4951 if (requestCode >= 0) { 4952 // If this start is requesting a result, we can avoid making 4953 // the activity visible until the result is received. Setting 4954 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4955 // activity hidden during this time, to avoid flickering. 4956 // This can only be done when a result is requested because 4957 // that guarantees we will get information back when the 4958 // activity is finished, no matter what happens to it. 4959 mStartedActivity = true; 4960 } 4961 return result != ActivityManager.START_RETURN_INTENT_TO_CALLER; 4962 } 4963 4964 throw new UnsupportedOperationException( 4965 "startActivityIfNeeded can only be called from a top-level activity"); 4966 } 4967 4968 /** 4969 * Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with 4970 * no options. 4971 * 4972 * @param intent The intent to dispatch to the next activity. For 4973 * correct behavior, this must be the same as the Intent that started 4974 * your own activity; the only changes you can make are to the extras 4975 * inside of it. 4976 * 4977 * @return Returns a boolean indicating whether there was another Activity 4978 * to start: true if there was a next activity to start, false if there 4979 * wasn't. In general, if true is returned you will then want to call 4980 * finish() on yourself. 4981 */ 4982 public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent) { 4983 return startNextMatchingActivity(intent, null); 4984 } 4985 4986 /** 4987 * Special version of starting an activity, for use when you are replacing 4988 * other activity components. You can use this to hand the Intent off 4989 * to the next Activity that can handle it. You typically call this in 4990 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 4991 * 4992 * @param intent The intent to dispatch to the next activity. For 4993 * correct behavior, this must be the same as the Intent that started 4994 * your own activity; the only changes you can make are to the extras 4995 * inside of it. 4996 * @param options Additional options for how the Activity should be started. 4997 * See {@link android.content.Context#startActivity(Intent, Bundle)} 4998 * Context.startActivity(Intent, Bundle)} for more details. 4999 * 5000 * @return Returns a boolean indicating whether there was another Activity 5001 * to start: true if there was a next activity to start, false if there 5002 * wasn't. In general, if true is returned you will then want to call 5003 * finish() on yourself. 5004 */ 5005 public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent, 5006 @Nullable Bundle options) { 5007 if (mParent == null) { 5008 try { 5009 intent.migrateExtraStreamToClipData(); 5010 intent.prepareToLeaveProcess(this); 5011 return ActivityManager.getService() 5012 .startNextMatchingActivity(mToken, intent, options); 5013 } catch (RemoteException e) { 5014 // Empty 5015 } 5016 return false; 5017 } 5018 5019 throw new UnsupportedOperationException( 5020 "startNextMatchingActivity can only be called from a top-level activity"); 5021 } 5022 5023 /** 5024 * Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)} 5025 * with no options. 5026 * 5027 * @param child The activity making the call. 5028 * @param intent The intent to start. 5029 * @param requestCode Reply request code. < 0 if reply is not requested. 5030 * 5031 * @throws android.content.ActivityNotFoundException 5032 * 5033 * @see #startActivity 5034 * @see #startActivityForResult 5035 */ 5036 public void startActivityFromChild(@NonNull Activity child, @RequiresPermission Intent intent, 5037 int requestCode) { 5038 startActivityFromChild(child, intent, requestCode, null); 5039 } 5040 5041 /** 5042 * This is called when a child activity of this one calls its 5043 * {@link #startActivity} or {@link #startActivityForResult} method. 5044 * 5045 * <p>This method throws {@link android.content.ActivityNotFoundException} 5046 * if there was no Activity found to run the given Intent. 5047 * 5048 * @param child The activity making the call. 5049 * @param intent The intent to start. 5050 * @param requestCode Reply request code. < 0 if reply is not requested. 5051 * @param options Additional options for how the Activity should be started. 5052 * See {@link android.content.Context#startActivity(Intent, Bundle)} 5053 * Context.startActivity(Intent, Bundle)} for more details. 5054 * 5055 * @throws android.content.ActivityNotFoundException 5056 * 5057 * @see #startActivity 5058 * @see #startActivityForResult 5059 */ 5060 public void startActivityFromChild(@NonNull Activity child, @RequiresPermission Intent intent, 5061 int requestCode, @Nullable Bundle options) { 5062 options = transferSpringboardActivityOptions(options); 5063 Instrumentation.ActivityResult ar = 5064 mInstrumentation.execStartActivity( 5065 this, mMainThread.getApplicationThread(), mToken, child, 5066 intent, requestCode, options); 5067 if (ar != null) { 5068 mMainThread.sendActivityResult( 5069 mToken, child.mEmbeddedID, requestCode, 5070 ar.getResultCode(), ar.getResultData()); 5071 } 5072 cancelInputsAndStartExitTransition(options); 5073 } 5074 5075 /** 5076 * Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)} 5077 * with no options. 5078 * 5079 * @param fragment The fragment making the call. 5080 * @param intent The intent to start. 5081 * @param requestCode Reply request code. < 0 if reply is not requested. 5082 * 5083 * @throws android.content.ActivityNotFoundException 5084 * 5085 * @see Fragment#startActivity 5086 * @see Fragment#startActivityForResult 5087 */ 5088 public void startActivityFromFragment(@NonNull Fragment fragment, 5089 @RequiresPermission Intent intent, int requestCode) { 5090 startActivityFromFragment(fragment, intent, requestCode, null); 5091 } 5092 5093 /** 5094 * This is called when a Fragment in this activity calls its 5095 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 5096 * method. 5097 * 5098 * <p>This method throws {@link android.content.ActivityNotFoundException} 5099 * if there was no Activity found to run the given Intent. 5100 * 5101 * @param fragment The fragment making the call. 5102 * @param intent The intent to start. 5103 * @param requestCode Reply request code. < 0 if reply is not requested. 5104 * @param options Additional options for how the Activity should be started. 5105 * See {@link android.content.Context#startActivity(Intent, Bundle)} 5106 * Context.startActivity(Intent, Bundle)} for more details. 5107 * 5108 * @throws android.content.ActivityNotFoundException 5109 * 5110 * @see Fragment#startActivity 5111 * @see Fragment#startActivityForResult 5112 */ 5113 public void startActivityFromFragment(@NonNull Fragment fragment, 5114 @RequiresPermission Intent intent, int requestCode, @Nullable Bundle options) { 5115 startActivityForResult(fragment.mWho, intent, requestCode, options); 5116 } 5117 5118 /** 5119 * @hide 5120 */ 5121 public void startActivityAsUserFromFragment(@NonNull Fragment fragment, 5122 @RequiresPermission Intent intent, int requestCode, @Nullable Bundle options, 5123 UserHandle user) { 5124 startActivityForResultAsUser(intent, fragment.mWho, requestCode, options, user); 5125 } 5126 5127 /** 5128 * @hide 5129 */ 5130 @Override 5131 public void startActivityForResult( 5132 String who, Intent intent, int requestCode, @Nullable Bundle options) { 5133 Uri referrer = onProvideReferrer(); 5134 if (referrer != null) { 5135 intent.putExtra(Intent.EXTRA_REFERRER, referrer); 5136 } 5137 options = transferSpringboardActivityOptions(options); 5138 Instrumentation.ActivityResult ar = 5139 mInstrumentation.execStartActivity( 5140 this, mMainThread.getApplicationThread(), mToken, who, 5141 intent, requestCode, options); 5142 if (ar != null) { 5143 mMainThread.sendActivityResult( 5144 mToken, who, requestCode, 5145 ar.getResultCode(), ar.getResultData()); 5146 } 5147 cancelInputsAndStartExitTransition(options); 5148 } 5149 5150 /** 5151 * @hide 5152 */ 5153 @Override 5154 public boolean canStartActivityForResult() { 5155 return true; 5156 } 5157 5158 /** 5159 * Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender, 5160 * int, Intent, int, int, int, Bundle)} with no options. 5161 */ 5162 public void startIntentSenderFromChild(Activity child, IntentSender intent, 5163 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 5164 int extraFlags) 5165 throws IntentSender.SendIntentException { 5166 startIntentSenderFromChild(child, intent, requestCode, fillInIntent, 5167 flagsMask, flagsValues, extraFlags, null); 5168 } 5169 5170 /** 5171 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 5172 * taking a IntentSender; see 5173 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 5174 * for more information. 5175 */ 5176 public void startIntentSenderFromChild(Activity child, IntentSender intent, 5177 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 5178 int extraFlags, @Nullable Bundle options) 5179 throws IntentSender.SendIntentException { 5180 startIntentSenderForResultInner(intent, child.mEmbeddedID, requestCode, fillInIntent, 5181 flagsMask, flagsValues, options); 5182 } 5183 5184 /** 5185 * Like {@link #startIntentSenderFromChild}, but taking a Fragment; see 5186 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 5187 * for more information. 5188 * 5189 * @hide 5190 */ 5191 public void startIntentSenderFromChildFragment(Fragment child, IntentSender intent, 5192 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 5193 int extraFlags, @Nullable Bundle options) 5194 throws IntentSender.SendIntentException { 5195 startIntentSenderForResultInner(intent, child.mWho, requestCode, fillInIntent, 5196 flagsMask, flagsValues, options); 5197 } 5198 5199 /** 5200 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 5201 * or {@link #finish} to specify an explicit transition animation to 5202 * perform next. 5203 * 5204 * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative 5205 * to using this with starting activities is to supply the desired animation 5206 * information through a {@link ActivityOptions} bundle to 5207 * {@link #startActivity(Intent, Bundle)} or a related function. This allows 5208 * you to specify a custom animation even when starting an activity from 5209 * outside the context of the current top activity. 5210 * 5211 * @param enterAnim A resource ID of the animation resource to use for 5212 * the incoming activity. Use 0 for no animation. 5213 * @param exitAnim A resource ID of the animation resource to use for 5214 * the outgoing activity. Use 0 for no animation. 5215 */ 5216 public void overridePendingTransition(int enterAnim, int exitAnim) { 5217 try { 5218 ActivityManager.getService().overridePendingTransition( 5219 mToken, getPackageName(), enterAnim, exitAnim); 5220 } catch (RemoteException e) { 5221 } 5222 } 5223 5224 /** 5225 * Call this to set the result that your activity will return to its 5226 * caller. 5227 * 5228 * @param resultCode The result code to propagate back to the originating 5229 * activity, often RESULT_CANCELED or RESULT_OK 5230 * 5231 * @see #RESULT_CANCELED 5232 * @see #RESULT_OK 5233 * @see #RESULT_FIRST_USER 5234 * @see #setResult(int, Intent) 5235 */ 5236 public final void setResult(int resultCode) { 5237 synchronized (this) { 5238 mResultCode = resultCode; 5239 mResultData = null; 5240 } 5241 } 5242 5243 /** 5244 * Call this to set the result that your activity will return to its 5245 * caller. 5246 * 5247 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 5248 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 5249 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 5250 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 5251 * Activity receiving the result access to the specific URIs in the Intent. 5252 * Access will remain until the Activity has finished (it will remain across the hosting 5253 * process being killed and other temporary destruction) and will be added 5254 * to any existing set of URI permissions it already holds. 5255 * 5256 * @param resultCode The result code to propagate back to the originating 5257 * activity, often RESULT_CANCELED or RESULT_OK 5258 * @param data The data to propagate back to the originating activity. 5259 * 5260 * @see #RESULT_CANCELED 5261 * @see #RESULT_OK 5262 * @see #RESULT_FIRST_USER 5263 * @see #setResult(int) 5264 */ 5265 public final void setResult(int resultCode, Intent data) { 5266 synchronized (this) { 5267 mResultCode = resultCode; 5268 mResultData = data; 5269 } 5270 } 5271 5272 /** 5273 * Return information about who launched this activity. If the launching Intent 5274 * contains an {@link android.content.Intent#EXTRA_REFERRER Intent.EXTRA_REFERRER}, 5275 * that will be returned as-is; otherwise, if known, an 5276 * {@link Intent#URI_ANDROID_APP_SCHEME android-app:} referrer URI containing the 5277 * package name that started the Intent will be returned. This may return null if no 5278 * referrer can be identified -- it is neither explicitly specified, nor is it known which 5279 * application package was involved. 5280 * 5281 * <p>If called while inside the handling of {@link #onNewIntent}, this function will 5282 * return the referrer that submitted that new intent to the activity. Otherwise, it 5283 * always returns the referrer of the original Intent.</p> 5284 * 5285 * <p>Note that this is <em>not</em> a security feature -- you can not trust the 5286 * referrer information, applications can spoof it.</p> 5287 */ 5288 @Nullable 5289 public Uri getReferrer() { 5290 Intent intent = getIntent(); 5291 try { 5292 Uri referrer = intent.getParcelableExtra(Intent.EXTRA_REFERRER); 5293 if (referrer != null) { 5294 return referrer; 5295 } 5296 String referrerName = intent.getStringExtra(Intent.EXTRA_REFERRER_NAME); 5297 if (referrerName != null) { 5298 return Uri.parse(referrerName); 5299 } 5300 } catch (BadParcelableException e) { 5301 Log.w(TAG, "Cannot read referrer from intent;" 5302 + " intent extras contain unknown custom Parcelable objects"); 5303 } 5304 if (mReferrer != null) { 5305 return new Uri.Builder().scheme("android-app").authority(mReferrer).build(); 5306 } 5307 return null; 5308 } 5309 5310 /** 5311 * Override to generate the desired referrer for the content currently being shown 5312 * by the app. The default implementation returns null, meaning the referrer will simply 5313 * be the android-app: of the package name of this activity. Return a non-null Uri to 5314 * have that supplied as the {@link Intent#EXTRA_REFERRER} of any activities started from it. 5315 */ 5316 public Uri onProvideReferrer() { 5317 return null; 5318 } 5319 5320 /** 5321 * Return the name of the package that invoked this activity. This is who 5322 * the data in {@link #setResult setResult()} will be sent to. You can 5323 * use this information to validate that the recipient is allowed to 5324 * receive the data. 5325 * 5326 * <p class="note">Note: if the calling activity is not expecting a result (that is it 5327 * did not use the {@link #startActivityForResult} 5328 * form that includes a request code), then the calling package will be 5329 * null.</p> 5330 * 5331 * <p class="note">Note: prior to {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, 5332 * the result from this method was unstable. If the process hosting the calling 5333 * package was no longer running, it would return null instead of the proper package 5334 * name. You can use {@link #getCallingActivity()} and retrieve the package name 5335 * from that instead.</p> 5336 * 5337 * @return The package of the activity that will receive your 5338 * reply, or null if none. 5339 */ 5340 @Nullable 5341 public String getCallingPackage() { 5342 try { 5343 return ActivityManager.getService().getCallingPackage(mToken); 5344 } catch (RemoteException e) { 5345 return null; 5346 } 5347 } 5348 5349 /** 5350 * Return the name of the activity that invoked this activity. This is 5351 * who the data in {@link #setResult setResult()} will be sent to. You 5352 * can use this information to validate that the recipient is allowed to 5353 * receive the data. 5354 * 5355 * <p class="note">Note: if the calling activity is not expecting a result (that is it 5356 * did not use the {@link #startActivityForResult} 5357 * form that includes a request code), then the calling package will be 5358 * null. 5359 * 5360 * @return The ComponentName of the activity that will receive your 5361 * reply, or null if none. 5362 */ 5363 @Nullable 5364 public ComponentName getCallingActivity() { 5365 try { 5366 return ActivityManager.getService().getCallingActivity(mToken); 5367 } catch (RemoteException e) { 5368 return null; 5369 } 5370 } 5371 5372 /** 5373 * Control whether this activity's main window is visible. This is intended 5374 * only for the special case of an activity that is not going to show a 5375 * UI itself, but can't just finish prior to onResume() because it needs 5376 * to wait for a service binding or such. Setting this to false allows 5377 * you to prevent your UI from being shown during that time. 5378 * 5379 * <p>The default value for this is taken from the 5380 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 5381 */ 5382 public void setVisible(boolean visible) { 5383 if (mVisibleFromClient != visible) { 5384 mVisibleFromClient = visible; 5385 if (mVisibleFromServer) { 5386 if (visible) makeVisible(); 5387 else mDecor.setVisibility(View.INVISIBLE); 5388 } 5389 } 5390 } 5391 5392 void makeVisible() { 5393 if (!mWindowAdded) { 5394 ViewManager wm = getWindowManager(); 5395 wm.addView(mDecor, getWindow().getAttributes()); 5396 mWindowAdded = true; 5397 } 5398 mDecor.setVisibility(View.VISIBLE); 5399 } 5400 5401 /** 5402 * Check to see whether this activity is in the process of finishing, 5403 * either because you called {@link #finish} on it or someone else 5404 * has requested that it finished. This is often used in 5405 * {@link #onPause} to determine whether the activity is simply pausing or 5406 * completely finishing. 5407 * 5408 * @return If the activity is finishing, returns true; else returns false. 5409 * 5410 * @see #finish 5411 */ 5412 public boolean isFinishing() { 5413 return mFinished; 5414 } 5415 5416 /** 5417 * Returns true if the final {@link #onDestroy()} call has been made 5418 * on the Activity, so this instance is now dead. 5419 */ 5420 public boolean isDestroyed() { 5421 return mDestroyed; 5422 } 5423 5424 /** 5425 * Check to see whether this activity is in the process of being destroyed in order to be 5426 * recreated with a new configuration. This is often used in 5427 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 5428 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 5429 * 5430 * @return If the activity is being torn down in order to be recreated with a new configuration, 5431 * returns true; else returns false. 5432 */ 5433 public boolean isChangingConfigurations() { 5434 return mChangingConfigurations; 5435 } 5436 5437 /** 5438 * Cause this Activity to be recreated with a new instance. This results 5439 * in essentially the same flow as when the Activity is created due to 5440 * a configuration change -- the current instance will go through its 5441 * lifecycle to {@link #onDestroy} and a new instance then created after it. 5442 */ 5443 public void recreate() { 5444 if (mParent != null) { 5445 throw new IllegalStateException("Can only be called on top-level activity"); 5446 } 5447 if (Looper.myLooper() != mMainThread.getLooper()) { 5448 throw new IllegalStateException("Must be called from main thread"); 5449 } 5450 try { 5451 ActivityManager.getService().requestActivityRelaunch(mToken); 5452 } catch (RemoteException e) { 5453 } 5454 } 5455 5456 /** 5457 * Finishes the current activity and specifies whether to remove the task associated with this 5458 * activity. 5459 */ 5460 private void finish(int finishTask) { 5461 if (mParent == null) { 5462 int resultCode; 5463 Intent resultData; 5464 synchronized (this) { 5465 resultCode = mResultCode; 5466 resultData = mResultData; 5467 } 5468 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 5469 try { 5470 if (resultData != null) { 5471 resultData.prepareToLeaveProcess(this); 5472 } 5473 if (ActivityManager.getService() 5474 .finishActivity(mToken, resultCode, resultData, finishTask)) { 5475 mFinished = true; 5476 } 5477 } catch (RemoteException e) { 5478 // Empty 5479 } 5480 } else { 5481 mParent.finishFromChild(this); 5482 } 5483 } 5484 5485 /** 5486 * Call this when your activity is done and should be closed. The 5487 * ActivityResult is propagated back to whoever launched you via 5488 * onActivityResult(). 5489 */ 5490 public void finish() { 5491 finish(DONT_FINISH_TASK_WITH_ACTIVITY); 5492 } 5493 5494 /** 5495 * Finish this activity as well as all activities immediately below it 5496 * in the current task that have the same affinity. This is typically 5497 * used when an application can be launched on to another task (such as 5498 * from an ACTION_VIEW of a content type it understands) and the user 5499 * has used the up navigation to switch out of the current task and in 5500 * to its own task. In this case, if the user has navigated down into 5501 * any other activities of the second application, all of those should 5502 * be removed from the original task as part of the task switch. 5503 * 5504 * <p>Note that this finish does <em>not</em> allow you to deliver results 5505 * to the previous activity, and an exception will be thrown if you are trying 5506 * to do so.</p> 5507 */ 5508 public void finishAffinity() { 5509 if (mParent != null) { 5510 throw new IllegalStateException("Can not be called from an embedded activity"); 5511 } 5512 if (mResultCode != RESULT_CANCELED || mResultData != null) { 5513 throw new IllegalStateException("Can not be called to deliver a result"); 5514 } 5515 try { 5516 if (ActivityManager.getService().finishActivityAffinity(mToken)) { 5517 mFinished = true; 5518 } 5519 } catch (RemoteException e) { 5520 // Empty 5521 } 5522 } 5523 5524 /** 5525 * This is called when a child activity of this one calls its 5526 * {@link #finish} method. The default implementation simply calls 5527 * finish() on this activity (the parent), finishing the entire group. 5528 * 5529 * @param child The activity making the call. 5530 * 5531 * @see #finish 5532 */ 5533 public void finishFromChild(Activity child) { 5534 finish(); 5535 } 5536 5537 /** 5538 * Reverses the Activity Scene entry Transition and triggers the calling Activity 5539 * to reverse its exit Transition. When the exit Transition completes, 5540 * {@link #finish()} is called. If no entry Transition was used, finish() is called 5541 * immediately and the Activity exit Transition is run. 5542 * @see android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, android.util.Pair[]) 5543 */ 5544 public void finishAfterTransition() { 5545 if (!mActivityTransitionState.startExitBackTransition(this)) { 5546 finish(); 5547 } 5548 } 5549 5550 /** 5551 * Force finish another activity that you had previously started with 5552 * {@link #startActivityForResult}. 5553 * 5554 * @param requestCode The request code of the activity that you had 5555 * given to startActivityForResult(). If there are multiple 5556 * activities started with this request code, they 5557 * will all be finished. 5558 */ 5559 public void finishActivity(int requestCode) { 5560 if (mParent == null) { 5561 try { 5562 ActivityManager.getService() 5563 .finishSubActivity(mToken, mEmbeddedID, requestCode); 5564 } catch (RemoteException e) { 5565 // Empty 5566 } 5567 } else { 5568 mParent.finishActivityFromChild(this, requestCode); 5569 } 5570 } 5571 5572 /** 5573 * This is called when a child activity of this one calls its 5574 * finishActivity(). 5575 * 5576 * @param child The activity making the call. 5577 * @param requestCode Request code that had been used to start the 5578 * activity. 5579 */ 5580 public void finishActivityFromChild(@NonNull Activity child, int requestCode) { 5581 try { 5582 ActivityManager.getService() 5583 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 5584 } catch (RemoteException e) { 5585 // Empty 5586 } 5587 } 5588 5589 /** 5590 * Call this when your activity is done and should be closed and the task should be completely 5591 * removed as a part of finishing the root activity of the task. 5592 */ 5593 public void finishAndRemoveTask() { 5594 finish(FINISH_TASK_WITH_ROOT_ACTIVITY); 5595 } 5596 5597 /** 5598 * Ask that the local app instance of this activity be released to free up its memory. 5599 * This is asking for the activity to be destroyed, but does <b>not</b> finish the activity -- 5600 * a new instance of the activity will later be re-created if needed due to the user 5601 * navigating back to it. 5602 * 5603 * @return Returns true if the activity was in a state that it has started the process 5604 * of destroying its current instance; returns false if for any reason this could not 5605 * be done: it is currently visible to the user, it is already being destroyed, it is 5606 * being finished, it hasn't yet saved its state, etc. 5607 */ 5608 public boolean releaseInstance() { 5609 try { 5610 return ActivityManager.getService().releaseActivityInstance(mToken); 5611 } catch (RemoteException e) { 5612 // Empty 5613 } 5614 return false; 5615 } 5616 5617 /** 5618 * Called when an activity you launched exits, giving you the requestCode 5619 * you started it with, the resultCode it returned, and any additional 5620 * data from it. The <var>resultCode</var> will be 5621 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 5622 * didn't return any result, or crashed during its operation. 5623 * 5624 * <p>You will receive this call immediately before onResume() when your 5625 * activity is re-starting. 5626 * 5627 * <p>This method is never invoked if your activity sets 5628 * {@link android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 5629 * <code>true</code>. 5630 * 5631 * @param requestCode The integer request code originally supplied to 5632 * startActivityForResult(), allowing you to identify who this 5633 * result came from. 5634 * @param resultCode The integer result code returned by the child activity 5635 * through its setResult(). 5636 * @param data An Intent, which can return result data to the caller 5637 * (various data can be attached to Intent "extras"). 5638 * 5639 * @see #startActivityForResult 5640 * @see #createPendingResult 5641 * @see #setResult(int) 5642 */ 5643 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 5644 } 5645 5646 /** 5647 * Called when an activity you launched with an activity transition exposes this 5648 * Activity through a returning activity transition, giving you the resultCode 5649 * and any additional data from it. This method will only be called if the activity 5650 * set a result code other than {@link #RESULT_CANCELED} and it supports activity 5651 * transitions with {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 5652 * 5653 * <p>The purpose of this function is to let the called Activity send a hint about 5654 * its state so that this underlying Activity can prepare to be exposed. A call to 5655 * this method does not guarantee that the called Activity has or will be exiting soon. 5656 * It only indicates that it will expose this Activity's Window and it has 5657 * some data to pass to prepare it.</p> 5658 * 5659 * @param resultCode The integer result code returned by the child activity 5660 * through its setResult(). 5661 * @param data An Intent, which can return result data to the caller 5662 * (various data can be attached to Intent "extras"). 5663 */ 5664 public void onActivityReenter(int resultCode, Intent data) { 5665 } 5666 5667 /** 5668 * Create a new PendingIntent object which you can hand to others 5669 * for them to use to send result data back to your 5670 * {@link #onActivityResult} callback. The created object will be either 5671 * one-shot (becoming invalid after a result is sent back) or multiple 5672 * (allowing any number of results to be sent through it). 5673 * 5674 * @param requestCode Private request code for the sender that will be 5675 * associated with the result data when it is returned. The sender can not 5676 * modify this value, allowing you to identify incoming results. 5677 * @param data Default data to supply in the result, which may be modified 5678 * by the sender. 5679 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 5680 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 5681 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 5682 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 5683 * or any of the flags as supported by 5684 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 5685 * of the intent that can be supplied when the actual send happens. 5686 * 5687 * @return Returns an existing or new PendingIntent matching the given 5688 * parameters. May return null only if 5689 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 5690 * supplied. 5691 * 5692 * @see PendingIntent 5693 */ 5694 public PendingIntent createPendingResult(int requestCode, @NonNull Intent data, 5695 @PendingIntent.Flags int flags) { 5696 String packageName = getPackageName(); 5697 try { 5698 data.prepareToLeaveProcess(this); 5699 IIntentSender target = 5700 ActivityManager.getService().getIntentSender( 5701 ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 5702 mParent == null ? mToken : mParent.mToken, 5703 mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null, 5704 UserHandle.myUserId()); 5705 return target != null ? new PendingIntent(target) : null; 5706 } catch (RemoteException e) { 5707 // Empty 5708 } 5709 return null; 5710 } 5711 5712 /** 5713 * Change the desired orientation of this activity. If the activity 5714 * is currently in the foreground or otherwise impacting the screen 5715 * orientation, the screen will immediately be changed (possibly causing 5716 * the activity to be restarted). Otherwise, this will be used the next 5717 * time the activity is visible. 5718 * 5719 * @param requestedOrientation An orientation constant as used in 5720 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 5721 */ 5722 public void setRequestedOrientation(@ActivityInfo.ScreenOrientation int requestedOrientation) { 5723 if (mParent == null) { 5724 try { 5725 ActivityManager.getService().setRequestedOrientation( 5726 mToken, requestedOrientation); 5727 } catch (RemoteException e) { 5728 // Empty 5729 } 5730 } else { 5731 mParent.setRequestedOrientation(requestedOrientation); 5732 } 5733 } 5734 5735 /** 5736 * Return the current requested orientation of the activity. This will 5737 * either be the orientation requested in its component's manifest, or 5738 * the last requested orientation given to 5739 * {@link #setRequestedOrientation(int)}. 5740 * 5741 * @return Returns an orientation constant as used in 5742 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 5743 */ 5744 @ActivityInfo.ScreenOrientation 5745 public int getRequestedOrientation() { 5746 if (mParent == null) { 5747 try { 5748 return ActivityManager.getService() 5749 .getRequestedOrientation(mToken); 5750 } catch (RemoteException e) { 5751 // Empty 5752 } 5753 } else { 5754 return mParent.getRequestedOrientation(); 5755 } 5756 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 5757 } 5758 5759 /** 5760 * Return the identifier of the task this activity is in. This identifier 5761 * will remain the same for the lifetime of the activity. 5762 * 5763 * @return Task identifier, an opaque integer. 5764 */ 5765 public int getTaskId() { 5766 try { 5767 return ActivityManager.getService() 5768 .getTaskForActivity(mToken, false); 5769 } catch (RemoteException e) { 5770 return -1; 5771 } 5772 } 5773 5774 /** 5775 * Return whether this activity is the root of a task. The root is the 5776 * first activity in a task. 5777 * 5778 * @return True if this is the root activity, else false. 5779 */ 5780 @Override 5781 public boolean isTaskRoot() { 5782 try { 5783 return ActivityManager.getService().getTaskForActivity(mToken, true) >= 0; 5784 } catch (RemoteException e) { 5785 return false; 5786 } 5787 } 5788 5789 /** 5790 * Move the task containing this activity to the back of the activity 5791 * stack. The activity's order within the task is unchanged. 5792 * 5793 * @param nonRoot If false then this only works if the activity is the root 5794 * of a task; if true it will work for any activity in 5795 * a task. 5796 * 5797 * @return If the task was moved (or it was already at the 5798 * back) true is returned, else false. 5799 */ 5800 public boolean moveTaskToBack(boolean nonRoot) { 5801 try { 5802 return ActivityManager.getService().moveActivityTaskToBack( 5803 mToken, nonRoot); 5804 } catch (RemoteException e) { 5805 // Empty 5806 } 5807 return false; 5808 } 5809 5810 /** 5811 * Returns class name for this activity with the package prefix removed. 5812 * This is the default name used to read and write settings. 5813 * 5814 * @return The local class name. 5815 */ 5816 @NonNull 5817 public String getLocalClassName() { 5818 final String pkg = getPackageName(); 5819 final String cls = mComponent.getClassName(); 5820 int packageLen = pkg.length(); 5821 if (!cls.startsWith(pkg) || cls.length() <= packageLen 5822 || cls.charAt(packageLen) != '.') { 5823 return cls; 5824 } 5825 return cls.substring(packageLen+1); 5826 } 5827 5828 /** 5829 * Returns complete component name of this activity. 5830 * 5831 * @return Returns the complete component name for this activity 5832 */ 5833 public ComponentName getComponentName() 5834 { 5835 return mComponent; 5836 } 5837 5838 /** 5839 * Retrieve a {@link SharedPreferences} object for accessing preferences 5840 * that are private to this activity. This simply calls the underlying 5841 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 5842 * class name as the preferences name. 5843 * 5844 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 5845 * operation. 5846 * 5847 * @return Returns the single SharedPreferences instance that can be used 5848 * to retrieve and modify the preference values. 5849 */ 5850 public SharedPreferences getPreferences(@Context.PreferencesMode int mode) { 5851 return getSharedPreferences(getLocalClassName(), mode); 5852 } 5853 5854 private void ensureSearchManager() { 5855 if (mSearchManager != null) { 5856 return; 5857 } 5858 5859 try { 5860 mSearchManager = new SearchManager(this, null); 5861 } catch (ServiceNotFoundException e) { 5862 throw new IllegalStateException(e); 5863 } 5864 } 5865 5866 @Override 5867 public Object getSystemService(@ServiceName @NonNull String name) { 5868 if (getBaseContext() == null) { 5869 throw new IllegalStateException( 5870 "System services not available to Activities before onCreate()"); 5871 } 5872 5873 if (WINDOW_SERVICE.equals(name)) { 5874 return mWindowManager; 5875 } else if (SEARCH_SERVICE.equals(name)) { 5876 ensureSearchManager(); 5877 return mSearchManager; 5878 } 5879 return super.getSystemService(name); 5880 } 5881 5882 /** 5883 * Change the title associated with this activity. If this is a 5884 * top-level activity, the title for its window will change. If it 5885 * is an embedded activity, the parent can do whatever it wants 5886 * with it. 5887 */ 5888 public void setTitle(CharSequence title) { 5889 mTitle = title; 5890 onTitleChanged(title, mTitleColor); 5891 5892 if (mParent != null) { 5893 mParent.onChildTitleChanged(this, title); 5894 } 5895 } 5896 5897 /** 5898 * Change the title associated with this activity. If this is a 5899 * top-level activity, the title for its window will change. If it 5900 * is an embedded activity, the parent can do whatever it wants 5901 * with it. 5902 */ 5903 public void setTitle(int titleId) { 5904 setTitle(getText(titleId)); 5905 } 5906 5907 /** 5908 * Change the color of the title associated with this activity. 5909 * <p> 5910 * This method is deprecated starting in API Level 11 and replaced by action 5911 * bar styles. For information on styling the Action Bar, read the <a 5912 * href="{@docRoot} guide/topics/ui/actionbar.html">Action Bar</a> developer 5913 * guide. 5914 * 5915 * @deprecated Use action bar styles instead. 5916 */ 5917 @Deprecated 5918 public void setTitleColor(int textColor) { 5919 mTitleColor = textColor; 5920 onTitleChanged(mTitle, textColor); 5921 } 5922 5923 public final CharSequence getTitle() { 5924 return mTitle; 5925 } 5926 5927 public final int getTitleColor() { 5928 return mTitleColor; 5929 } 5930 5931 protected void onTitleChanged(CharSequence title, int color) { 5932 if (mTitleReady) { 5933 final Window win = getWindow(); 5934 if (win != null) { 5935 win.setTitle(title); 5936 if (color != 0) { 5937 win.setTitleColor(color); 5938 } 5939 } 5940 if (mActionBar != null) { 5941 mActionBar.setWindowTitle(title); 5942 } 5943 } 5944 } 5945 5946 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 5947 } 5948 5949 /** 5950 * Sets information describing the task with this activity for presentation inside the Recents 5951 * System UI. When {@link ActivityManager#getRecentTasks} is called, the activities of each task 5952 * are traversed in order from the topmost activity to the bottommost. The traversal continues 5953 * for each property until a suitable value is found. For each task the taskDescription will be 5954 * returned in {@link android.app.ActivityManager.TaskDescription}. 5955 * 5956 * @see ActivityManager#getRecentTasks 5957 * @see android.app.ActivityManager.TaskDescription 5958 * 5959 * @param taskDescription The TaskDescription properties that describe the task with this activity 5960 */ 5961 public void setTaskDescription(ActivityManager.TaskDescription taskDescription) { 5962 if (mTaskDescription != taskDescription) { 5963 mTaskDescription.copyFromPreserveHiddenFields(taskDescription); 5964 // Scale the icon down to something reasonable if it is provided 5965 if (taskDescription.getIconFilename() == null && taskDescription.getIcon() != null) { 5966 final int size = ActivityManager.getLauncherLargeIconSizeInner(this); 5967 final Bitmap icon = Bitmap.createScaledBitmap(taskDescription.getIcon(), size, size, 5968 true); 5969 mTaskDescription.setIcon(icon); 5970 } 5971 } 5972 try { 5973 ActivityManager.getService().setTaskDescription(mToken, mTaskDescription); 5974 } catch (RemoteException e) { 5975 } 5976 } 5977 5978 /** 5979 * Sets the visibility of the progress bar in the title. 5980 * <p> 5981 * In order for the progress bar to be shown, the feature must be requested 5982 * via {@link #requestWindowFeature(int)}. 5983 * 5984 * @param visible Whether to show the progress bars in the title. 5985 * @deprecated No longer supported starting in API 21. 5986 */ 5987 @Deprecated 5988 public final void setProgressBarVisibility(boolean visible) { 5989 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 5990 Window.PROGRESS_VISIBILITY_OFF); 5991 } 5992 5993 /** 5994 * Sets the visibility of the indeterminate progress bar in the title. 5995 * <p> 5996 * In order for the progress bar to be shown, the feature must be requested 5997 * via {@link #requestWindowFeature(int)}. 5998 * 5999 * @param visible Whether to show the progress bars in the title. 6000 * @deprecated No longer supported starting in API 21. 6001 */ 6002 @Deprecated 6003 public final void setProgressBarIndeterminateVisibility(boolean visible) { 6004 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 6005 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 6006 } 6007 6008 /** 6009 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 6010 * is always indeterminate). 6011 * <p> 6012 * In order for the progress bar to be shown, the feature must be requested 6013 * via {@link #requestWindowFeature(int)}. 6014 * 6015 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 6016 * @deprecated No longer supported starting in API 21. 6017 */ 6018 @Deprecated 6019 public final void setProgressBarIndeterminate(boolean indeterminate) { 6020 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 6021 indeterminate ? Window.PROGRESS_INDETERMINATE_ON 6022 : Window.PROGRESS_INDETERMINATE_OFF); 6023 } 6024 6025 /** 6026 * Sets the progress for the progress bars in the title. 6027 * <p> 6028 * In order for the progress bar to be shown, the feature must be requested 6029 * via {@link #requestWindowFeature(int)}. 6030 * 6031 * @param progress The progress for the progress bar. Valid ranges are from 6032 * 0 to 10000 (both inclusive). If 10000 is given, the progress 6033 * bar will be completely filled and will fade out. 6034 * @deprecated No longer supported starting in API 21. 6035 */ 6036 @Deprecated 6037 public final void setProgress(int progress) { 6038 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 6039 } 6040 6041 /** 6042 * Sets the secondary progress for the progress bar in the title. This 6043 * progress is drawn between the primary progress (set via 6044 * {@link #setProgress(int)} and the background. It can be ideal for media 6045 * scenarios such as showing the buffering progress while the default 6046 * progress shows the play progress. 6047 * <p> 6048 * In order for the progress bar to be shown, the feature must be requested 6049 * via {@link #requestWindowFeature(int)}. 6050 * 6051 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 6052 * 0 to 10000 (both inclusive). 6053 * @deprecated No longer supported starting in API 21. 6054 */ 6055 @Deprecated 6056 public final void setSecondaryProgress(int secondaryProgress) { 6057 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 6058 secondaryProgress + Window.PROGRESS_SECONDARY_START); 6059 } 6060 6061 /** 6062 * Suggests an audio stream whose volume should be changed by the hardware 6063 * volume controls. 6064 * <p> 6065 * The suggested audio stream will be tied to the window of this Activity. 6066 * Volume requests which are received while the Activity is in the 6067 * foreground will affect this stream. 6068 * <p> 6069 * It is not guaranteed that the hardware volume controls will always change 6070 * this stream's volume (for example, if a call is in progress, its stream's 6071 * volume may be changed instead). To reset back to the default, use 6072 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 6073 * 6074 * @param streamType The type of the audio stream whose volume should be 6075 * changed by the hardware volume controls. 6076 */ 6077 public final void setVolumeControlStream(int streamType) { 6078 getWindow().setVolumeControlStream(streamType); 6079 } 6080 6081 /** 6082 * Gets the suggested audio stream whose volume should be changed by the 6083 * hardware volume controls. 6084 * 6085 * @return The suggested audio stream type whose volume should be changed by 6086 * the hardware volume controls. 6087 * @see #setVolumeControlStream(int) 6088 */ 6089 public final int getVolumeControlStream() { 6090 return getWindow().getVolumeControlStream(); 6091 } 6092 6093 /** 6094 * Sets a {@link MediaController} to send media keys and volume changes to. 6095 * <p> 6096 * The controller will be tied to the window of this Activity. Media key and 6097 * volume events which are received while the Activity is in the foreground 6098 * will be forwarded to the controller and used to invoke transport controls 6099 * or adjust the volume. This may be used instead of or in addition to 6100 * {@link #setVolumeControlStream} to affect a specific session instead of a 6101 * specific stream. 6102 * <p> 6103 * It is not guaranteed that the hardware volume controls will always change 6104 * this session's volume (for example, if a call is in progress, its 6105 * stream's volume may be changed instead). To reset back to the default use 6106 * null as the controller. 6107 * 6108 * @param controller The controller for the session which should receive 6109 * media keys and volume changes. 6110 */ 6111 public final void setMediaController(MediaController controller) { 6112 getWindow().setMediaController(controller); 6113 } 6114 6115 /** 6116 * Gets the controller which should be receiving media key and volume events 6117 * while this activity is in the foreground. 6118 * 6119 * @return The controller which should receive events. 6120 * @see #setMediaController(android.media.session.MediaController) 6121 */ 6122 public final MediaController getMediaController() { 6123 return getWindow().getMediaController(); 6124 } 6125 6126 /** 6127 * Runs the specified action on the UI thread. If the current thread is the UI 6128 * thread, then the action is executed immediately. If the current thread is 6129 * not the UI thread, the action is posted to the event queue of the UI thread. 6130 * 6131 * @param action the action to run on the UI thread 6132 */ 6133 @Override 6134 public final void runOnUiThread(Runnable action) { 6135 if (Thread.currentThread() != mUiThread) { 6136 mHandler.post(action); 6137 } else { 6138 action.run(); 6139 } 6140 } 6141 6142 /** 6143 * Standard implementation of 6144 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 6145 * inflating with the LayoutInflater returned by {@link #getSystemService}. 6146 * This implementation does nothing and is for 6147 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 6148 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 6149 * 6150 * @see android.view.LayoutInflater#createView 6151 * @see android.view.Window#getLayoutInflater 6152 */ 6153 @Nullable 6154 public View onCreateView(String name, Context context, AttributeSet attrs) { 6155 return null; 6156 } 6157 6158 /** 6159 * Standard implementation of 6160 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 6161 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 6162 * This implementation handles <fragment> tags to embed fragments inside 6163 * of the activity. 6164 * 6165 * @see android.view.LayoutInflater#createView 6166 * @see android.view.Window#getLayoutInflater 6167 */ 6168 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 6169 if (!"fragment".equals(name)) { 6170 return onCreateView(name, context, attrs); 6171 } 6172 6173 return mFragments.onCreateView(parent, name, context, attrs); 6174 } 6175 6176 /** 6177 * Print the Activity's state into the given stream. This gets invoked if 6178 * you run "adb shell dumpsys activity <activity_component_name>". 6179 * 6180 * @param prefix Desired prefix to prepend at each line of output. 6181 * @param fd The raw file descriptor that the dump is being sent to. 6182 * @param writer The PrintWriter to which you should dump your state. This will be 6183 * closed for you after you return. 6184 * @param args additional arguments to the dump request. 6185 */ 6186 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 6187 dumpInner(prefix, fd, writer, args); 6188 } 6189 6190 void dumpInner(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 6191 writer.print(prefix); writer.print("Local Activity "); 6192 writer.print(Integer.toHexString(System.identityHashCode(this))); 6193 writer.println(" State:"); 6194 String innerPrefix = prefix + " "; 6195 writer.print(innerPrefix); writer.print("mResumed="); 6196 writer.print(mResumed); writer.print(" mStopped="); 6197 writer.print(mStopped); writer.print(" mFinished="); 6198 writer.println(mFinished); 6199 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 6200 writer.println(mChangingConfigurations); 6201 writer.print(innerPrefix); writer.print("mCurrentConfig="); 6202 writer.println(mCurrentConfig); 6203 6204 mFragments.dumpLoaders(innerPrefix, fd, writer, args); 6205 mFragments.getFragmentManager().dump(innerPrefix, fd, writer, args); 6206 if (mVoiceInteractor != null) { 6207 mVoiceInteractor.dump(innerPrefix, fd, writer, args); 6208 } 6209 6210 if (getWindow() != null && 6211 getWindow().peekDecorView() != null && 6212 getWindow().peekDecorView().getViewRootImpl() != null) { 6213 getWindow().peekDecorView().getViewRootImpl().dump(prefix, fd, writer, args); 6214 } 6215 6216 mHandler.getLooper().dump(new PrintWriterPrinter(writer), prefix); 6217 } 6218 6219 /** 6220 * Bit indicating that this activity is "immersive" and should not be 6221 * interrupted by notifications if possible. 6222 * 6223 * This value is initially set by the manifest property 6224 * <code>android:immersive</code> but may be changed at runtime by 6225 * {@link #setImmersive}. 6226 * 6227 * @see #setImmersive(boolean) 6228 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6229 */ 6230 public boolean isImmersive() { 6231 try { 6232 return ActivityManager.getService().isImmersive(mToken); 6233 } catch (RemoteException e) { 6234 return false; 6235 } 6236 } 6237 6238 /** 6239 * Indication of whether this is the highest level activity in this task. Can be used to 6240 * determine whether an activity launched by this activity was placed in the same task or 6241 * another task. 6242 * 6243 * @return true if this is the topmost, non-finishing activity in its task. 6244 */ 6245 private boolean isTopOfTask() { 6246 if (mToken == null || mWindow == null) { 6247 return false; 6248 } 6249 try { 6250 return ActivityManager.getService().isTopOfTask(getActivityToken()); 6251 } catch (RemoteException e) { 6252 return false; 6253 } 6254 } 6255 6256 /** 6257 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} to a 6258 * fullscreen opaque Activity. 6259 * <p> 6260 * Call this whenever the background of a translucent Activity has changed to become opaque. 6261 * Doing so will allow the {@link android.view.Surface} of the Activity behind to be released. 6262 * <p> 6263 * This call has no effect on non-translucent activities or on activities with the 6264 * {@link android.R.attr#windowIsFloating} attribute. 6265 * 6266 * @see #convertToTranslucent(android.app.Activity.TranslucentConversionListener, 6267 * ActivityOptions) 6268 * @see TranslucentConversionListener 6269 * 6270 * @hide 6271 */ 6272 @SystemApi 6273 public void convertFromTranslucent() { 6274 try { 6275 mTranslucentCallback = null; 6276 if (ActivityManager.getService().convertFromTranslucent(mToken)) { 6277 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, true); 6278 } 6279 } catch (RemoteException e) { 6280 // pass 6281 } 6282 } 6283 6284 /** 6285 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} back from 6286 * opaque to translucent following a call to {@link #convertFromTranslucent()}. 6287 * <p> 6288 * Calling this allows the Activity behind this one to be seen again. Once all such Activities 6289 * have been redrawn {@link TranslucentConversionListener#onTranslucentConversionComplete} will 6290 * be called indicating that it is safe to make this activity translucent again. Until 6291 * {@link TranslucentConversionListener#onTranslucentConversionComplete} is called the image 6292 * behind the frontmost Activity will be indeterminate. 6293 * <p> 6294 * This call has no effect on non-translucent activities or on activities with the 6295 * {@link android.R.attr#windowIsFloating} attribute. 6296 * 6297 * @param callback the method to call when all visible Activities behind this one have been 6298 * drawn and it is safe to make this Activity translucent again. 6299 * @param options activity options delivered to the activity below this one. The options 6300 * are retrieved using {@link #getActivityOptions}. 6301 * @return <code>true</code> if Window was opaque and will become translucent or 6302 * <code>false</code> if window was translucent and no change needed to be made. 6303 * 6304 * @see #convertFromTranslucent() 6305 * @see TranslucentConversionListener 6306 * 6307 * @hide 6308 */ 6309 @SystemApi 6310 public boolean convertToTranslucent(TranslucentConversionListener callback, 6311 ActivityOptions options) { 6312 boolean drawComplete; 6313 try { 6314 mTranslucentCallback = callback; 6315 mChangeCanvasToTranslucent = ActivityManager.getService().convertToTranslucent( 6316 mToken, options == null ? null : options.toBundle()); 6317 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 6318 drawComplete = true; 6319 } catch (RemoteException e) { 6320 // Make callback return as though it timed out. 6321 mChangeCanvasToTranslucent = false; 6322 drawComplete = false; 6323 } 6324 if (!mChangeCanvasToTranslucent && mTranslucentCallback != null) { 6325 // Window is already translucent. 6326 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 6327 } 6328 return mChangeCanvasToTranslucent; 6329 } 6330 6331 /** @hide */ 6332 void onTranslucentConversionComplete(boolean drawComplete) { 6333 if (mTranslucentCallback != null) { 6334 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 6335 mTranslucentCallback = null; 6336 } 6337 if (mChangeCanvasToTranslucent) { 6338 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 6339 } 6340 } 6341 6342 /** @hide */ 6343 public void onNewActivityOptions(ActivityOptions options) { 6344 mActivityTransitionState.setEnterActivityOptions(this, options); 6345 if (!mStopped) { 6346 mActivityTransitionState.enterReady(this); 6347 } 6348 } 6349 6350 /** 6351 * Retrieve the ActivityOptions passed in from the launching activity or passed back 6352 * from an activity launched by this activity in its call to {@link 6353 * #convertToTranslucent(TranslucentConversionListener, ActivityOptions)} 6354 * 6355 * @return The ActivityOptions passed to {@link #convertToTranslucent}. 6356 * @hide 6357 */ 6358 ActivityOptions getActivityOptions() { 6359 try { 6360 return ActivityOptions.fromBundle( 6361 ActivityManager.getService().getActivityOptions(mToken)); 6362 } catch (RemoteException e) { 6363 } 6364 return null; 6365 } 6366 6367 /** 6368 * Activities that want to remain visible behind a translucent activity above them must call 6369 * this method anytime between the start of {@link #onResume()} and the return from 6370 * {@link #onPause()}. If this call is successful then the activity will remain visible after 6371 * {@link #onPause()} is called, and is allowed to continue playing media in the background. 6372 * 6373 * <p>The actions of this call are reset each time that this activity is brought to the 6374 * front. That is, every time {@link #onResume()} is called the activity will be assumed 6375 * to not have requested visible behind. Therefore, if you want this activity to continue to 6376 * be visible in the background you must call this method again. 6377 * 6378 * <p>Only fullscreen opaque activities may make this call. I.e. this call is a nop 6379 * for dialog and translucent activities. 6380 * 6381 * <p>Under all circumstances, the activity must stop playing and release resources prior to or 6382 * within a call to {@link #onVisibleBehindCanceled()} or if this call returns false. 6383 * 6384 * <p>False will be returned any time this method is called between the return of onPause and 6385 * the next call to onResume. 6386 * 6387 * @deprecated This method's functionality is no longer supported as of 6388 * {@link android.os.Build.VERSION_CODES#O} and will be removed in a future release. 6389 * 6390 * @param visible true to notify the system that the activity wishes to be visible behind other 6391 * translucent activities, false to indicate otherwise. Resources must be 6392 * released when passing false to this method. 6393 * 6394 * @return the resulting visibiity state. If true the activity will remain visible beyond 6395 * {@link #onPause()} if the next activity is translucent or not fullscreen. If false 6396 * then the activity may not count on being visible behind other translucent activities, 6397 * and must stop any media playback and release resources. 6398 * Returning false may occur in lieu of a call to {@link #onVisibleBehindCanceled()} so 6399 * the return value must be checked. 6400 * 6401 * @see #onVisibleBehindCanceled() 6402 */ 6403 @Deprecated 6404 public boolean requestVisibleBehind(boolean visible) { 6405 return false; 6406 } 6407 6408 /** 6409 * Called when a translucent activity over this activity is becoming opaque or another 6410 * activity is being launched. Activities that override this method must call 6411 * <code>super.onVisibleBehindCanceled()</code> or a SuperNotCalledException will be thrown. 6412 * 6413 * <p>When this method is called the activity has 500 msec to release any resources it may be 6414 * using while visible in the background. 6415 * If the activity has not returned from this method in 500 msec the system will destroy 6416 * the activity and kill the process in order to recover the resources for another 6417 * process. Otherwise {@link #onStop()} will be called following return. 6418 * 6419 * @see #requestVisibleBehind(boolean) 6420 * 6421 * @deprecated This method's functionality is no longer supported as of 6422 * {@link android.os.Build.VERSION_CODES#O} and will be removed in a future release. 6423 */ 6424 @Deprecated 6425 @CallSuper 6426 public void onVisibleBehindCanceled() { 6427 mCalled = true; 6428 } 6429 6430 /** 6431 * Translucent activities may call this to determine if there is an activity below them that 6432 * is currently set to be visible in the background. 6433 * 6434 * @deprecated This method's functionality is no longer supported as of 6435 * {@link android.os.Build.VERSION_CODES#O} and will be removed in a future release. 6436 * 6437 * @return true if an activity below is set to visible according to the most recent call to 6438 * {@link #requestVisibleBehind(boolean)}, false otherwise. 6439 * 6440 * @see #requestVisibleBehind(boolean) 6441 * @see #onVisibleBehindCanceled() 6442 * @see #onBackgroundVisibleBehindChanged(boolean) 6443 * @hide 6444 */ 6445 @Deprecated 6446 @SystemApi 6447 public boolean isBackgroundVisibleBehind() { 6448 try { 6449 return ActivityManager.getService().isBackgroundVisibleBehind(mToken); 6450 } catch (RemoteException e) { 6451 } 6452 return false; 6453 } 6454 6455 /** 6456 * The topmost foreground activity will receive this call when the background visibility state 6457 * of the activity below it changes. 6458 * 6459 * This call may be a consequence of {@link #requestVisibleBehind(boolean)} or might be 6460 * due to a background activity finishing itself. 6461 * 6462 * @deprecated This method's functionality is no longer supported as of 6463 * {@link android.os.Build.VERSION_CODES#O} and will be removed in a future release. 6464 * 6465 * @param visible true if a background activity is visible, false otherwise. 6466 * 6467 * @see #requestVisibleBehind(boolean) 6468 * @see #onVisibleBehindCanceled() 6469 * @hide 6470 */ 6471 @Deprecated 6472 @SystemApi 6473 public void onBackgroundVisibleBehindChanged(boolean visible) { 6474 } 6475 6476 /** 6477 * Activities cannot draw during the period that their windows are animating in. In order 6478 * to know when it is safe to begin drawing they can override this method which will be 6479 * called when the entering animation has completed. 6480 */ 6481 public void onEnterAnimationComplete() { 6482 } 6483 6484 /** 6485 * @hide 6486 */ 6487 public void dispatchEnterAnimationComplete() { 6488 onEnterAnimationComplete(); 6489 if (getWindow() != null && getWindow().getDecorView() != null) { 6490 getWindow().getDecorView().getViewTreeObserver().dispatchOnEnterAnimationComplete(); 6491 } 6492 } 6493 6494 /** 6495 * Adjust the current immersive mode setting. 6496 * 6497 * Note that changing this value will have no effect on the activity's 6498 * {@link android.content.pm.ActivityInfo} structure; that is, if 6499 * <code>android:immersive</code> is set to <code>true</code> 6500 * in the application's manifest entry for this activity, the {@link 6501 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 6502 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6503 * FLAG_IMMERSIVE} bit set. 6504 * 6505 * @see #isImmersive() 6506 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6507 */ 6508 public void setImmersive(boolean i) { 6509 try { 6510 ActivityManager.getService().setImmersive(mToken, i); 6511 } catch (RemoteException e) { 6512 // pass 6513 } 6514 } 6515 6516 /** 6517 * Enable or disable virtual reality (VR) mode for this Activity. 6518 * 6519 * <p>VR mode is a hint to Android system to switch to a mode optimized for VR applications 6520 * while this Activity has user focus.</p> 6521 * 6522 * <p>It is recommended that applications additionally declare 6523 * {@link android.R.attr#enableVrMode} in their manifest to allow for smooth activity 6524 * transitions when switching between VR activities.</p> 6525 * 6526 * <p>If the requested {@link android.service.vr.VrListenerService} component is not available, 6527 * VR mode will not be started. Developers can handle this case as follows:</p> 6528 * 6529 * <pre> 6530 * String servicePackage = "com.whatever.app"; 6531 * String serviceClass = "com.whatever.app.MyVrListenerService"; 6532 * 6533 * // Name of the component of the VrListenerService to start. 6534 * ComponentName serviceComponent = new ComponentName(servicePackage, serviceClass); 6535 * 6536 * try { 6537 * setVrModeEnabled(true, myComponentName); 6538 * } catch (PackageManager.NameNotFoundException e) { 6539 * List<ApplicationInfo> installed = getPackageManager().getInstalledApplications(0); 6540 * boolean isInstalled = false; 6541 * for (ApplicationInfo app : installed) { 6542 * if (app.packageName.equals(servicePackage)) { 6543 * isInstalled = true; 6544 * break; 6545 * } 6546 * } 6547 * if (isInstalled) { 6548 * // Package is installed, but not enabled in Settings. Let user enable it. 6549 * startActivity(new Intent(Settings.ACTION_VR_LISTENER_SETTINGS)); 6550 * } else { 6551 * // Package is not installed. Send an intent to download this. 6552 * sentIntentToLaunchAppStore(servicePackage); 6553 * } 6554 * } 6555 * </pre> 6556 * 6557 * @param enabled {@code true} to enable this mode. 6558 * @param requestedComponent the name of the component to use as a 6559 * {@link android.service.vr.VrListenerService} while VR mode is enabled. 6560 * 6561 * @throws android.content.pm.PackageManager.NameNotFoundException if the given component 6562 * to run as a {@link android.service.vr.VrListenerService} is not installed, or has 6563 * not been enabled in user settings. 6564 * 6565 * @see android.content.pm.PackageManager#FEATURE_VR_MODE 6566 * @see android.content.pm.PackageManager#FEATURE_VR_MODE_HIGH_PERFORMANCE 6567 * @see android.service.vr.VrListenerService 6568 * @see android.provider.Settings#ACTION_VR_LISTENER_SETTINGS 6569 * @see android.R.attr#enableVrMode 6570 */ 6571 public void setVrModeEnabled(boolean enabled, @NonNull ComponentName requestedComponent) 6572 throws PackageManager.NameNotFoundException { 6573 try { 6574 if (ActivityManager.getService().setVrMode(mToken, enabled, requestedComponent) 6575 != 0) { 6576 throw new PackageManager.NameNotFoundException( 6577 requestedComponent.flattenToString()); 6578 } 6579 } catch (RemoteException e) { 6580 // pass 6581 } 6582 } 6583 6584 /** 6585 * Start an action mode of the default type {@link ActionMode#TYPE_PRIMARY}. 6586 * 6587 * @param callback Callback that will manage lifecycle events for this action mode 6588 * @return The ActionMode that was started, or null if it was canceled 6589 * 6590 * @see ActionMode 6591 */ 6592 @Nullable 6593 public ActionMode startActionMode(ActionMode.Callback callback) { 6594 return mWindow.getDecorView().startActionMode(callback); 6595 } 6596 6597 /** 6598 * Start an action mode of the given type. 6599 * 6600 * @param callback Callback that will manage lifecycle events for this action mode 6601 * @param type One of {@link ActionMode#TYPE_PRIMARY} or {@link ActionMode#TYPE_FLOATING}. 6602 * @return The ActionMode that was started, or null if it was canceled 6603 * 6604 * @see ActionMode 6605 */ 6606 @Nullable 6607 public ActionMode startActionMode(ActionMode.Callback callback, int type) { 6608 return mWindow.getDecorView().startActionMode(callback, type); 6609 } 6610 6611 /** 6612 * Give the Activity a chance to control the UI for an action mode requested 6613 * by the system. 6614 * 6615 * <p>Note: If you are looking for a notification callback that an action mode 6616 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 6617 * 6618 * @param callback The callback that should control the new action mode 6619 * @return The new action mode, or <code>null</code> if the activity does not want to 6620 * provide special handling for this action mode. (It will be handled by the system.) 6621 */ 6622 @Nullable 6623 @Override 6624 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 6625 // Only Primary ActionModes are represented in the ActionBar. 6626 if (mActionModeTypeStarting == ActionMode.TYPE_PRIMARY) { 6627 initWindowDecorActionBar(); 6628 if (mActionBar != null) { 6629 return mActionBar.startActionMode(callback); 6630 } 6631 } 6632 return null; 6633 } 6634 6635 /** 6636 * {@inheritDoc} 6637 */ 6638 @Nullable 6639 @Override 6640 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback, int type) { 6641 try { 6642 mActionModeTypeStarting = type; 6643 return onWindowStartingActionMode(callback); 6644 } finally { 6645 mActionModeTypeStarting = ActionMode.TYPE_PRIMARY; 6646 } 6647 } 6648 6649 /** 6650 * Notifies the Activity that an action mode has been started. 6651 * Activity subclasses overriding this method should call the superclass implementation. 6652 * 6653 * @param mode The new action mode. 6654 */ 6655 @CallSuper 6656 @Override 6657 public void onActionModeStarted(ActionMode mode) { 6658 } 6659 6660 /** 6661 * Notifies the activity that an action mode has finished. 6662 * Activity subclasses overriding this method should call the superclass implementation. 6663 * 6664 * @param mode The action mode that just finished. 6665 */ 6666 @CallSuper 6667 @Override 6668 public void onActionModeFinished(ActionMode mode) { 6669 } 6670 6671 /** 6672 * Returns true if the app should recreate the task when navigating 'up' from this activity 6673 * by using targetIntent. 6674 * 6675 * <p>If this method returns false the app can trivially call 6676 * {@link #navigateUpTo(Intent)} using the same parameters to correctly perform 6677 * up navigation. If this method returns false, the app should synthesize a new task stack 6678 * by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation.</p> 6679 * 6680 * @param targetIntent An intent representing the target destination for up navigation 6681 * @return true if navigating up should recreate a new task stack, false if the same task 6682 * should be used for the destination 6683 */ 6684 public boolean shouldUpRecreateTask(Intent targetIntent) { 6685 try { 6686 PackageManager pm = getPackageManager(); 6687 ComponentName cn = targetIntent.getComponent(); 6688 if (cn == null) { 6689 cn = targetIntent.resolveActivity(pm); 6690 } 6691 ActivityInfo info = pm.getActivityInfo(cn, 0); 6692 if (info.taskAffinity == null) { 6693 return false; 6694 } 6695 return ActivityManager.getService() 6696 .shouldUpRecreateTask(mToken, info.taskAffinity); 6697 } catch (RemoteException e) { 6698 return false; 6699 } catch (NameNotFoundException e) { 6700 return false; 6701 } 6702 } 6703 6704 /** 6705 * Navigate from this activity to the activity specified by upIntent, finishing this activity 6706 * in the process. If the activity indicated by upIntent already exists in the task's history, 6707 * this activity and all others before the indicated activity in the history stack will be 6708 * finished. 6709 * 6710 * <p>If the indicated activity does not appear in the history stack, this will finish 6711 * each activity in this task until the root activity of the task is reached, resulting in 6712 * an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy 6713 * when an activity may be reached by a path not passing through a canonical parent 6714 * activity.</p> 6715 * 6716 * <p>This method should be used when performing up navigation from within the same task 6717 * as the destination. If up navigation should cross tasks in some cases, see 6718 * {@link #shouldUpRecreateTask(Intent)}.</p> 6719 * 6720 * @param upIntent An intent representing the target destination for up navigation 6721 * 6722 * @return true if up navigation successfully reached the activity indicated by upIntent and 6723 * upIntent was delivered to it. false if an instance of the indicated activity could 6724 * not be found and this activity was simply finished normally. 6725 */ 6726 public boolean navigateUpTo(Intent upIntent) { 6727 if (mParent == null) { 6728 ComponentName destInfo = upIntent.getComponent(); 6729 if (destInfo == null) { 6730 destInfo = upIntent.resolveActivity(getPackageManager()); 6731 if (destInfo == null) { 6732 return false; 6733 } 6734 upIntent = new Intent(upIntent); 6735 upIntent.setComponent(destInfo); 6736 } 6737 int resultCode; 6738 Intent resultData; 6739 synchronized (this) { 6740 resultCode = mResultCode; 6741 resultData = mResultData; 6742 } 6743 if (resultData != null) { 6744 resultData.prepareToLeaveProcess(this); 6745 } 6746 try { 6747 upIntent.prepareToLeaveProcess(this); 6748 return ActivityManager.getService().navigateUpTo(mToken, upIntent, 6749 resultCode, resultData); 6750 } catch (RemoteException e) { 6751 return false; 6752 } 6753 } else { 6754 return mParent.navigateUpToFromChild(this, upIntent); 6755 } 6756 } 6757 6758 /** 6759 * This is called when a child activity of this one calls its 6760 * {@link #navigateUpTo} method. The default implementation simply calls 6761 * navigateUpTo(upIntent) on this activity (the parent). 6762 * 6763 * @param child The activity making the call. 6764 * @param upIntent An intent representing the target destination for up navigation 6765 * 6766 * @return true if up navigation successfully reached the activity indicated by upIntent and 6767 * upIntent was delivered to it. false if an instance of the indicated activity could 6768 * not be found and this activity was simply finished normally. 6769 */ 6770 public boolean navigateUpToFromChild(Activity child, Intent upIntent) { 6771 return navigateUpTo(upIntent); 6772 } 6773 6774 /** 6775 * Obtain an {@link Intent} that will launch an explicit target activity specified by 6776 * this activity's logical parent. The logical parent is named in the application's manifest 6777 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute. 6778 * Activity subclasses may override this method to modify the Intent returned by 6779 * super.getParentActivityIntent() or to implement a different mechanism of retrieving 6780 * the parent intent entirely. 6781 * 6782 * @return a new Intent targeting the defined parent of this activity or null if 6783 * there is no valid parent. 6784 */ 6785 @Nullable 6786 public Intent getParentActivityIntent() { 6787 final String parentName = mActivityInfo.parentActivityName; 6788 if (TextUtils.isEmpty(parentName)) { 6789 return null; 6790 } 6791 6792 // If the parent itself has no parent, generate a main activity intent. 6793 final ComponentName target = new ComponentName(this, parentName); 6794 try { 6795 final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0); 6796 final String parentActivity = parentInfo.parentActivityName; 6797 final Intent parentIntent = parentActivity == null 6798 ? Intent.makeMainActivity(target) 6799 : new Intent().setComponent(target); 6800 return parentIntent; 6801 } catch (NameNotFoundException e) { 6802 Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName + 6803 "' in manifest"); 6804 return null; 6805 } 6806 } 6807 6808 /** 6809 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6810 * android.view.View, String)} was used to start an Activity, <var>callback</var> 6811 * will be called to handle shared elements on the <i>launched</i> Activity. This requires 6812 * {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 6813 * 6814 * @param callback Used to manipulate shared element transitions on the launched Activity. 6815 */ 6816 public void setEnterSharedElementCallback(SharedElementCallback callback) { 6817 if (callback == null) { 6818 callback = SharedElementCallback.NULL_CALLBACK; 6819 } 6820 mEnterTransitionListener = callback; 6821 } 6822 6823 /** 6824 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6825 * android.view.View, String)} was used to start an Activity, <var>callback</var> 6826 * will be called to handle shared elements on the <i>launching</i> Activity. Most 6827 * calls will only come when returning from the started Activity. 6828 * This requires {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 6829 * 6830 * @param callback Used to manipulate shared element transitions on the launching Activity. 6831 */ 6832 public void setExitSharedElementCallback(SharedElementCallback callback) { 6833 if (callback == null) { 6834 callback = SharedElementCallback.NULL_CALLBACK; 6835 } 6836 mExitTransitionListener = callback; 6837 } 6838 6839 /** 6840 * Postpone the entering activity transition when Activity was started with 6841 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6842 * android.util.Pair[])}. 6843 * <p>This method gives the Activity the ability to delay starting the entering and 6844 * shared element transitions until all data is loaded. Until then, the Activity won't 6845 * draw into its window, leaving the window transparent. This may also cause the 6846 * returning animation to be delayed until data is ready. This method should be 6847 * called in {@link #onCreate(android.os.Bundle)} or in 6848 * {@link #onActivityReenter(int, android.content.Intent)}. 6849 * {@link #startPostponedEnterTransition()} must be called to allow the Activity to 6850 * start the transitions. If the Activity did not use 6851 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6852 * android.util.Pair[])}, then this method does nothing.</p> 6853 */ 6854 public void postponeEnterTransition() { 6855 mActivityTransitionState.postponeEnterTransition(); 6856 } 6857 6858 /** 6859 * Begin postponed transitions after {@link #postponeEnterTransition()} was called. 6860 * If postponeEnterTransition() was called, you must call startPostponedEnterTransition() 6861 * to have your Activity start drawing. 6862 */ 6863 public void startPostponedEnterTransition() { 6864 mActivityTransitionState.startPostponedEnterTransition(); 6865 } 6866 6867 /** 6868 * Create {@link DragAndDropPermissions} object bound to this activity and controlling the 6869 * access permissions for content URIs associated with the {@link DragEvent}. 6870 * @param event Drag event 6871 * @return The {@link DragAndDropPermissions} object used to control access to the content URIs. 6872 * Null if no content URIs are associated with the event or if permissions could not be granted. 6873 */ 6874 public DragAndDropPermissions requestDragAndDropPermissions(DragEvent event) { 6875 DragAndDropPermissions dragAndDropPermissions = DragAndDropPermissions.obtain(event); 6876 if (dragAndDropPermissions != null && dragAndDropPermissions.take(getActivityToken())) { 6877 return dragAndDropPermissions; 6878 } 6879 return null; 6880 } 6881 6882 // ------------------ Internal API ------------------ 6883 6884 final void setParent(Activity parent) { 6885 mParent = parent; 6886 } 6887 6888 final void attach(Context context, ActivityThread aThread, 6889 Instrumentation instr, IBinder token, int ident, 6890 Application application, Intent intent, ActivityInfo info, 6891 CharSequence title, Activity parent, String id, 6892 NonConfigurationInstances lastNonConfigurationInstances, 6893 Configuration config, String referrer, IVoiceInteractor voiceInteractor, 6894 Window window, ActivityConfigCallback activityConfigCallback) { 6895 attachBaseContext(context); 6896 6897 mFragments.attachHost(null /*parent*/); 6898 6899 mWindow = new PhoneWindow(this, window, activityConfigCallback); 6900 mWindow.setWindowControllerCallback(this); 6901 mWindow.setCallback(this); 6902 mWindow.setOnWindowDismissedCallback(this); 6903 mWindow.getLayoutInflater().setPrivateFactory(this); 6904 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 6905 mWindow.setSoftInputMode(info.softInputMode); 6906 } 6907 if (info.uiOptions != 0) { 6908 mWindow.setUiOptions(info.uiOptions); 6909 } 6910 mUiThread = Thread.currentThread(); 6911 6912 mMainThread = aThread; 6913 mInstrumentation = instr; 6914 mToken = token; 6915 mIdent = ident; 6916 mApplication = application; 6917 mIntent = intent; 6918 mReferrer = referrer; 6919 mComponent = intent.getComponent(); 6920 mActivityInfo = info; 6921 mTitle = title; 6922 mParent = parent; 6923 mEmbeddedID = id; 6924 mLastNonConfigurationInstances = lastNonConfigurationInstances; 6925 if (voiceInteractor != null) { 6926 if (lastNonConfigurationInstances != null) { 6927 mVoiceInteractor = lastNonConfigurationInstances.voiceInteractor; 6928 } else { 6929 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 6930 Looper.myLooper()); 6931 } 6932 } 6933 6934 mWindow.setWindowManager( 6935 (WindowManager)context.getSystemService(Context.WINDOW_SERVICE), 6936 mToken, mComponent.flattenToString(), 6937 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 6938 if (mParent != null) { 6939 mWindow.setContainer(mParent.getWindow()); 6940 } 6941 mWindowManager = mWindow.getWindowManager(); 6942 mCurrentConfig = config; 6943 6944 mWindow.setColorMode(info.colorMode); 6945 } 6946 6947 /** @hide */ 6948 public final IBinder getActivityToken() { 6949 return mParent != null ? mParent.getActivityToken() : mToken; 6950 } 6951 6952 final void performCreateCommon() { 6953 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 6954 com.android.internal.R.styleable.Window_windowNoDisplay, false); 6955 mFragments.dispatchActivityCreated(); 6956 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6957 } 6958 6959 final void performCreate(Bundle icicle) { 6960 restoreHasCurrentPermissionRequest(icicle); 6961 onCreate(icicle); 6962 mActivityTransitionState.readState(icicle); 6963 performCreateCommon(); 6964 } 6965 6966 final void performCreate(Bundle icicle, PersistableBundle persistentState) { 6967 restoreHasCurrentPermissionRequest(icicle); 6968 onCreate(icicle, persistentState); 6969 mActivityTransitionState.readState(icicle); 6970 performCreateCommon(); 6971 } 6972 6973 final void performStart() { 6974 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6975 mFragments.noteStateNotSaved(); 6976 mCalled = false; 6977 mFragments.execPendingActions(); 6978 mInstrumentation.callActivityOnStart(this); 6979 if (!mCalled) { 6980 throw new SuperNotCalledException( 6981 "Activity " + mComponent.toShortString() + 6982 " did not call through to super.onStart()"); 6983 } 6984 mFragments.dispatchStart(); 6985 mFragments.reportLoaderStart(); 6986 6987 // This property is set for all builds except final release 6988 boolean isDlwarningEnabled = SystemProperties.getInt("ro.bionic.ld.warning", 0) == 1; 6989 boolean isAppDebuggable = 6990 (mApplication.getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0; 6991 6992 if (isAppDebuggable || isDlwarningEnabled) { 6993 String dlwarning = getDlWarning(); 6994 if (dlwarning != null) { 6995 String appName = getApplicationInfo().loadLabel(getPackageManager()) 6996 .toString(); 6997 String warning = "Detected problems with app native libraries\n" + 6998 "(please consult log for detail):\n" + dlwarning; 6999 if (isAppDebuggable) { 7000 new AlertDialog.Builder(this). 7001 setTitle(appName). 7002 setMessage(warning). 7003 setPositiveButton(android.R.string.ok, null). 7004 setCancelable(false). 7005 show(); 7006 } else { 7007 Toast.makeText(this, appName + "\n" + warning, Toast.LENGTH_LONG).show(); 7008 } 7009 } 7010 } 7011 7012 mActivityTransitionState.enterReady(this); 7013 } 7014 7015 final void performRestart() { 7016 mFragments.noteStateNotSaved(); 7017 7018 if (mToken != null && mParent == null) { 7019 // No need to check mStopped, the roots will check if they were actually stopped. 7020 WindowManagerGlobal.getInstance().setStoppedState(mToken, false /* stopped */); 7021 } 7022 7023 if (mStopped) { 7024 mStopped = false; 7025 7026 synchronized (mManagedCursors) { 7027 final int N = mManagedCursors.size(); 7028 for (int i=0; i<N; i++) { 7029 ManagedCursor mc = mManagedCursors.get(i); 7030 if (mc.mReleased || mc.mUpdated) { 7031 if (!mc.mCursor.requery()) { 7032 if (getApplicationInfo().targetSdkVersion 7033 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 7034 throw new IllegalStateException( 7035 "trying to requery an already closed cursor " 7036 + mc.mCursor); 7037 } 7038 } 7039 mc.mReleased = false; 7040 mc.mUpdated = false; 7041 } 7042 } 7043 } 7044 7045 mCalled = false; 7046 mInstrumentation.callActivityOnRestart(this); 7047 if (!mCalled) { 7048 throw new SuperNotCalledException( 7049 "Activity " + mComponent.toShortString() + 7050 " did not call through to super.onRestart()"); 7051 } 7052 performStart(); 7053 } 7054 } 7055 7056 final void performResume() { 7057 performRestart(); 7058 7059 mFragments.execPendingActions(); 7060 7061 mLastNonConfigurationInstances = null; 7062 7063 mCalled = false; 7064 // mResumed is set by the instrumentation 7065 mInstrumentation.callActivityOnResume(this); 7066 if (!mCalled) { 7067 throw new SuperNotCalledException( 7068 "Activity " + mComponent.toShortString() + 7069 " did not call through to super.onResume()"); 7070 } 7071 7072 // invisible activities must be finished before onResume() completes 7073 if (!mVisibleFromClient && !mFinished) { 7074 Log.w(TAG, "An activity without a UI must call finish() before onResume() completes"); 7075 if (getApplicationInfo().targetSdkVersion 7076 > android.os.Build.VERSION_CODES.LOLLIPOP_MR1) { 7077 throw new IllegalStateException( 7078 "Activity " + mComponent.toShortString() + 7079 " did not call finish() prior to onResume() completing"); 7080 } 7081 } 7082 7083 // Now really resume, and install the current status bar and menu. 7084 mCalled = false; 7085 7086 mFragments.dispatchResume(); 7087 mFragments.execPendingActions(); 7088 7089 onPostResume(); 7090 if (!mCalled) { 7091 throw new SuperNotCalledException( 7092 "Activity " + mComponent.toShortString() + 7093 " did not call through to super.onPostResume()"); 7094 } 7095 } 7096 7097 final void performPause() { 7098 mDoReportFullyDrawn = false; 7099 mFragments.dispatchPause(); 7100 mCalled = false; 7101 onPause(); 7102 mResumed = false; 7103 if (!mCalled && getApplicationInfo().targetSdkVersion 7104 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 7105 throw new SuperNotCalledException( 7106 "Activity " + mComponent.toShortString() + 7107 " did not call through to super.onPause()"); 7108 } 7109 mResumed = false; 7110 } 7111 7112 final void performUserLeaving() { 7113 onUserInteraction(); 7114 onUserLeaveHint(); 7115 } 7116 7117 final void performStop(boolean preserveWindow) { 7118 mDoReportFullyDrawn = false; 7119 mFragments.doLoaderStop(mChangingConfigurations /*retain*/); 7120 7121 if (!mStopped) { 7122 if (mWindow != null) { 7123 mWindow.closeAllPanels(); 7124 } 7125 7126 // If we're preserving the window, don't setStoppedState to true, since we 7127 // need the window started immediately again. Stopping the window will 7128 // destroys hardware resources and causes flicker. 7129 if (!preserveWindow && mToken != null && mParent == null) { 7130 WindowManagerGlobal.getInstance().setStoppedState(mToken, true); 7131 } 7132 7133 mFragments.dispatchStop(); 7134 7135 mCalled = false; 7136 mInstrumentation.callActivityOnStop(this); 7137 if (!mCalled) { 7138 throw new SuperNotCalledException( 7139 "Activity " + mComponent.toShortString() + 7140 " did not call through to super.onStop()"); 7141 } 7142 7143 synchronized (mManagedCursors) { 7144 final int N = mManagedCursors.size(); 7145 for (int i=0; i<N; i++) { 7146 ManagedCursor mc = mManagedCursors.get(i); 7147 if (!mc.mReleased) { 7148 mc.mCursor.deactivate(); 7149 mc.mReleased = true; 7150 } 7151 } 7152 } 7153 7154 mStopped = true; 7155 } 7156 mResumed = false; 7157 } 7158 7159 final void performDestroy() { 7160 mDestroyed = true; 7161 mWindow.destroy(); 7162 mFragments.dispatchDestroy(); 7163 onDestroy(); 7164 mFragments.doLoaderDestroy(); 7165 if (mVoiceInteractor != null) { 7166 mVoiceInteractor.detachActivity(); 7167 } 7168 } 7169 7170 final void dispatchMultiWindowModeChanged(boolean isInMultiWindowMode, 7171 Configuration newConfig) { 7172 if (DEBUG_LIFECYCLE) Slog.v(TAG, 7173 "dispatchMultiWindowModeChanged " + this + ": " + isInMultiWindowMode 7174 + " " + newConfig); 7175 mFragments.dispatchMultiWindowModeChanged(isInMultiWindowMode, newConfig); 7176 if (mWindow != null) { 7177 mWindow.onMultiWindowModeChanged(); 7178 } 7179 onMultiWindowModeChanged(isInMultiWindowMode, newConfig); 7180 } 7181 7182 final void dispatchPictureInPictureModeChanged(boolean isInPictureInPictureMode, 7183 Configuration newConfig) { 7184 if (DEBUG_LIFECYCLE) Slog.v(TAG, 7185 "dispatchPictureInPictureModeChanged " + this + ": " + isInPictureInPictureMode 7186 + " " + newConfig); 7187 mFragments.dispatchPictureInPictureModeChanged(isInPictureInPictureMode, newConfig); 7188 if (mWindow != null) { 7189 mWindow.onPictureInPictureModeChanged(isInPictureInPictureMode); 7190 } 7191 onPictureInPictureModeChanged(isInPictureInPictureMode, newConfig); 7192 } 7193 7194 /** 7195 * @hide 7196 */ 7197 public final boolean isResumed() { 7198 return mResumed; 7199 } 7200 7201 private void storeHasCurrentPermissionRequest(Bundle bundle) { 7202 if (bundle != null && mHasCurrentPermissionsRequest) { 7203 bundle.putBoolean(HAS_CURENT_PERMISSIONS_REQUEST_KEY, true); 7204 } 7205 } 7206 7207 private void restoreHasCurrentPermissionRequest(Bundle bundle) { 7208 if (bundle != null) { 7209 mHasCurrentPermissionsRequest = bundle.getBoolean( 7210 HAS_CURENT_PERMISSIONS_REQUEST_KEY, false); 7211 } 7212 } 7213 7214 void dispatchActivityResult(String who, int requestCode, 7215 int resultCode, Intent data) { 7216 if (false) Log.v( 7217 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 7218 + ", resCode=" + resultCode + ", data=" + data); 7219 mFragments.noteStateNotSaved(); 7220 if (who == null) { 7221 onActivityResult(requestCode, resultCode, data); 7222 } else if (who.startsWith(REQUEST_PERMISSIONS_WHO_PREFIX)) { 7223 who = who.substring(REQUEST_PERMISSIONS_WHO_PREFIX.length()); 7224 if (TextUtils.isEmpty(who)) { 7225 dispatchRequestPermissionsResult(requestCode, data); 7226 } else { 7227 Fragment frag = mFragments.findFragmentByWho(who); 7228 if (frag != null) { 7229 dispatchRequestPermissionsResultToFragment(requestCode, data, frag); 7230 } 7231 } 7232 } else if (who.startsWith("@android:view:")) { 7233 ArrayList<ViewRootImpl> views = WindowManagerGlobal.getInstance().getRootViews( 7234 getActivityToken()); 7235 for (ViewRootImpl viewRoot : views) { 7236 if (viewRoot.getView() != null 7237 && viewRoot.getView().dispatchActivityResult( 7238 who, requestCode, resultCode, data)) { 7239 return; 7240 } 7241 } 7242 } else if (who.startsWith(AUTO_FILL_AUTH_WHO_PREFIX)) { 7243 Intent resultData = (resultCode == Activity.RESULT_OK) ? data : null; 7244 getAutofillManager().onAuthenticationResult(requestCode, resultData); 7245 } else { 7246 Fragment frag = mFragments.findFragmentByWho(who); 7247 if (frag != null) { 7248 frag.onActivityResult(requestCode, resultCode, data); 7249 } 7250 } 7251 } 7252 7253 /** 7254 * Request to put this Activity in a mode where the user is locked to the 7255 * current task. 7256 * 7257 * This will prevent the user from launching other apps, going to settings, or reaching the 7258 * home screen. This does not include those apps whose {@link android.R.attr#lockTaskMode} 7259 * values permit launching while locked. 7260 * 7261 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns true or 7262 * lockTaskMode=lockTaskModeAlways for this component then the app will go directly into 7263 * Lock Task mode. The user will not be able to exit this mode until 7264 * {@link Activity#stopLockTask()} is called. 7265 * 7266 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns false 7267 * then the system will prompt the user with a dialog requesting permission to enter 7268 * this mode. When entered through this method the user can exit at any time through 7269 * an action described by the request dialog. Calling stopLockTask will also exit the 7270 * mode. 7271 * 7272 * @see android.R.attr#lockTaskMode 7273 */ 7274 public void startLockTask() { 7275 try { 7276 ActivityManager.getService().startLockTaskModeByToken(mToken); 7277 } catch (RemoteException e) { 7278 } 7279 } 7280 7281 /** 7282 * Allow the user to switch away from the current task. 7283 * 7284 * Called to end the mode started by {@link Activity#startLockTask}. This 7285 * can only be called by activities that have successfully called 7286 * startLockTask previously. 7287 * 7288 * This will allow the user to exit this app and move onto other activities. 7289 * <p>Note: This method should only be called when the activity is user-facing. That is, 7290 * between onResume() and onPause(). 7291 * <p>Note: If there are other tasks below this one that are also locked then calling this 7292 * method will immediately finish this task and resume the previous locked one, remaining in 7293 * lockTask mode. 7294 * 7295 * @see android.R.attr#lockTaskMode 7296 * @see ActivityManager#getLockTaskModeState() 7297 */ 7298 public void stopLockTask() { 7299 try { 7300 ActivityManager.getService().stopLockTaskMode(); 7301 } catch (RemoteException e) { 7302 } 7303 } 7304 7305 /** 7306 * Shows the user the system defined message for telling the user how to exit 7307 * lock task mode. The task containing this activity must be in lock task mode at the time 7308 * of this call for the message to be displayed. 7309 */ 7310 public void showLockTaskEscapeMessage() { 7311 try { 7312 ActivityManager.getService().showLockTaskEscapeMessage(mToken); 7313 } catch (RemoteException e) { 7314 } 7315 } 7316 7317 /** 7318 * Check whether the caption on freeform windows is displayed directly on the content. 7319 * 7320 * @return True if caption is displayed on content, false if it pushes the content down. 7321 * 7322 * @see #setOverlayWithDecorCaptionEnabled(boolean) 7323 * @hide 7324 */ 7325 public boolean isOverlayWithDecorCaptionEnabled() { 7326 return mWindow.isOverlayWithDecorCaptionEnabled(); 7327 } 7328 7329 /** 7330 * Set whether the caption should displayed directly on the content rather than push it down. 7331 * 7332 * This affects only freeform windows since they display the caption and only the main 7333 * window of the activity. The caption is used to drag the window around and also shows 7334 * maximize and close action buttons. 7335 * @hide 7336 */ 7337 public void setOverlayWithDecorCaptionEnabled(boolean enabled) { 7338 mWindow.setOverlayWithDecorCaptionEnabled(enabled); 7339 } 7340 7341 /** 7342 * Interface for informing a translucent {@link Activity} once all visible activities below it 7343 * have completed drawing. This is necessary only after an {@link Activity} has been made 7344 * opaque using {@link Activity#convertFromTranslucent()} and before it has been drawn 7345 * translucent again following a call to {@link 7346 * Activity#convertToTranslucent(android.app.Activity.TranslucentConversionListener, 7347 * ActivityOptions)} 7348 * 7349 * @hide 7350 */ 7351 @SystemApi 7352 public interface TranslucentConversionListener { 7353 /** 7354 * Callback made following {@link Activity#convertToTranslucent} once all visible Activities 7355 * below the top one have been redrawn. Following this callback it is safe to make the top 7356 * Activity translucent because the underlying Activity has been drawn. 7357 * 7358 * @param drawComplete True if the background Activity has drawn itself. False if a timeout 7359 * occurred waiting for the Activity to complete drawing. 7360 * 7361 * @see Activity#convertFromTranslucent() 7362 * @see Activity#convertToTranslucent(TranslucentConversionListener, ActivityOptions) 7363 */ 7364 public void onTranslucentConversionComplete(boolean drawComplete); 7365 } 7366 7367 private void dispatchRequestPermissionsResult(int requestCode, Intent data) { 7368 mHasCurrentPermissionsRequest = false; 7369 // If the package installer crashed we may have not data - best effort. 7370 String[] permissions = (data != null) ? data.getStringArrayExtra( 7371 PackageManager.EXTRA_REQUEST_PERMISSIONS_NAMES) : new String[0]; 7372 final int[] grantResults = (data != null) ? data.getIntArrayExtra( 7373 PackageManager.EXTRA_REQUEST_PERMISSIONS_RESULTS) : new int[0]; 7374 onRequestPermissionsResult(requestCode, permissions, grantResults); 7375 } 7376 7377 private void dispatchRequestPermissionsResultToFragment(int requestCode, Intent data, 7378 Fragment fragment) { 7379 // If the package installer crashed we may have not data - best effort. 7380 String[] permissions = (data != null) ? data.getStringArrayExtra( 7381 PackageManager.EXTRA_REQUEST_PERMISSIONS_NAMES) : new String[0]; 7382 final int[] grantResults = (data != null) ? data.getIntArrayExtra( 7383 PackageManager.EXTRA_REQUEST_PERMISSIONS_RESULTS) : new int[0]; 7384 fragment.onRequestPermissionsResult(requestCode, permissions, grantResults); 7385 } 7386 7387 /** @hide */ 7388 @Override 7389 final public void autofillCallbackAuthenticate(int authenticationId, IntentSender intent, 7390 Intent fillInIntent) { 7391 try { 7392 startIntentSenderForResultInner(intent, AUTO_FILL_AUTH_WHO_PREFIX, 7393 authenticationId, fillInIntent, 0, 0, null); 7394 } catch (IntentSender.SendIntentException e) { 7395 Log.e(TAG, "authenticate() failed for intent:" + intent, e); 7396 } 7397 } 7398 7399 /** @hide */ 7400 @Override 7401 final public void autofillCallbackResetableStateAvailable() { 7402 mAutoFillResetNeeded = true; 7403 } 7404 7405 /** @hide */ 7406 @Override 7407 final public boolean autofillCallbackRequestShowFillUi(@NonNull View anchor, int width, 7408 int height, @Nullable Rect anchorBounds, IAutofillWindowPresenter presenter) { 7409 final boolean wasShowing; 7410 7411 if (mAutofillPopupWindow == null) { 7412 wasShowing = false; 7413 mAutofillPopupWindow = new AutofillPopupWindow(presenter); 7414 } else { 7415 wasShowing = mAutofillPopupWindow.isShowing(); 7416 } 7417 mAutofillPopupWindow.update(anchor, 0, 0, width, height, anchorBounds); 7418 7419 return !wasShowing && mAutofillPopupWindow.isShowing(); 7420 } 7421 7422 /** @hide */ 7423 @Override 7424 final public boolean autofillCallbackRequestHideFillUi() { 7425 if (mAutofillPopupWindow == null) { 7426 return false; 7427 } 7428 mAutofillPopupWindow.dismiss(); 7429 mAutofillPopupWindow = null; 7430 return true; 7431 } 7432 7433 /** @hide */ 7434 @Override 7435 @NonNull public View[] findViewsByAutofillIdTraversal(@NonNull int[] viewIds) { 7436 final View[] views = new View[viewIds.length]; 7437 final ArrayList<ViewRootImpl> roots = 7438 WindowManagerGlobal.getInstance().getRootViews(getActivityToken()); 7439 7440 for (int rootNum = 0; rootNum < roots.size(); rootNum++) { 7441 final View rootView = roots.get(rootNum).getView(); 7442 7443 if (rootView != null) { 7444 for (int viewNum = 0; viewNum < viewIds.length; viewNum++) { 7445 if (views[viewNum] == null) { 7446 views[viewNum] = rootView.findViewByAutofillIdTraversal( 7447 viewIds[viewNum]); 7448 } 7449 } 7450 } 7451 } 7452 7453 return views; 7454 } 7455 7456 /** @hide */ 7457 @Override 7458 @Nullable public View findViewByAutofillIdTraversal(int viewId) { 7459 final ArrayList<ViewRootImpl> roots = 7460 WindowManagerGlobal.getInstance().getRootViews(getActivityToken()); 7461 for (int rootNum = 0; rootNum < roots.size(); rootNum++) { 7462 final View rootView = roots.get(rootNum).getView(); 7463 7464 if (rootView != null) { 7465 final View view = rootView.findViewByAutofillIdTraversal(viewId); 7466 if (view != null) { 7467 return view; 7468 } 7469 } 7470 } 7471 7472 return null; 7473 } 7474 7475 /** @hide */ 7476 @Override 7477 @NonNull public boolean[] getViewVisibility(@NonNull int[] viewIds) { 7478 final boolean[] isVisible = new boolean[viewIds.length]; 7479 final View views[] = findViewsByAutofillIdTraversal(viewIds); 7480 7481 for (int i = 0; i < viewIds.length; i++) { 7482 View view = views[i]; 7483 if (view == null) { 7484 isVisible[i] = false; 7485 continue; 7486 } 7487 7488 isVisible[i] = true; 7489 7490 // Check if the view is visible by checking all parents 7491 while (true) { 7492 if (view instanceof DecorView && view.getViewRootImpl() == view.getParent()) { 7493 break; 7494 } 7495 7496 if (view.getVisibility() != View.VISIBLE) { 7497 isVisible[i] = false; 7498 break; 7499 } 7500 7501 if (view.getParent() instanceof View) { 7502 view = (View) view.getParent(); 7503 } else { 7504 break; 7505 } 7506 } 7507 } 7508 7509 return isVisible; 7510 } 7511 7512 /** @hide */ 7513 @Override 7514 public boolean isVisibleForAutofill() { 7515 return !mStopped; 7516 } 7517 7518 /** 7519 * If set to true, this indicates to the system that it should never take a 7520 * screenshot of the activity to be used as a representation while it is not in a started state. 7521 * <p> 7522 * Note that the system may use the window background of the theme instead to represent 7523 * the window when it is not running. 7524 * <p> 7525 * Also note that in comparison to {@link android.view.WindowManager.LayoutParams#FLAG_SECURE}, 7526 * this only affects the behavior when the activity's screenshot would be used as a 7527 * representation when the activity is not in a started state, i.e. in Overview. The system may 7528 * still take screenshots of the activity in other contexts; for example, when the user takes a 7529 * screenshot of the entire screen, or when the active 7530 * {@link android.service.voice.VoiceInteractionService} requests a screenshot via 7531 * {@link android.service.voice.VoiceInteractionSession#SHOW_WITH_SCREENSHOT}. 7532 * 7533 * @param disable {@code true} to disable preview screenshots; {@code false} otherwise. 7534 * @hide 7535 */ 7536 @SystemApi 7537 public void setDisablePreviewScreenshots(boolean disable) { 7538 try { 7539 ActivityManager.getService().setDisablePreviewScreenshots(mToken, disable); 7540 } catch (RemoteException e) { 7541 Log.e(TAG, "Failed to call setDisablePreviewScreenshots", e); 7542 } 7543 } 7544 7545 class HostCallbacks extends FragmentHostCallback<Activity> { 7546 public HostCallbacks() { 7547 super(Activity.this /*activity*/); 7548 } 7549 7550 @Override 7551 public void onDump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 7552 Activity.this.dump(prefix, fd, writer, args); 7553 } 7554 7555 @Override 7556 public boolean onShouldSaveFragmentState(Fragment fragment) { 7557 return !isFinishing(); 7558 } 7559 7560 @Override 7561 public LayoutInflater onGetLayoutInflater() { 7562 final LayoutInflater result = Activity.this.getLayoutInflater(); 7563 if (onUseFragmentManagerInflaterFactory()) { 7564 return result.cloneInContext(Activity.this); 7565 } 7566 return result; 7567 } 7568 7569 @Override 7570 public boolean onUseFragmentManagerInflaterFactory() { 7571 // Newer platform versions use the child fragment manager's LayoutInflaterFactory. 7572 return getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.LOLLIPOP; 7573 } 7574 7575 @Override 7576 public Activity onGetHost() { 7577 return Activity.this; 7578 } 7579 7580 @Override 7581 public void onInvalidateOptionsMenu() { 7582 Activity.this.invalidateOptionsMenu(); 7583 } 7584 7585 @Override 7586 public void onStartActivityFromFragment(Fragment fragment, Intent intent, int requestCode, 7587 Bundle options) { 7588 Activity.this.startActivityFromFragment(fragment, intent, requestCode, options); 7589 } 7590 7591 @Override 7592 public void onStartActivityAsUserFromFragment( 7593 Fragment fragment, Intent intent, int requestCode, Bundle options, 7594 UserHandle user) { 7595 Activity.this.startActivityAsUserFromFragment( 7596 fragment, intent, requestCode, options, user); 7597 } 7598 7599 @Override 7600 public void onStartIntentSenderFromFragment(Fragment fragment, IntentSender intent, 7601 int requestCode, @Nullable Intent fillInIntent, int flagsMask, int flagsValues, 7602 int extraFlags, Bundle options) throws IntentSender.SendIntentException { 7603 if (mParent == null) { 7604 startIntentSenderForResultInner(intent, fragment.mWho, requestCode, fillInIntent, 7605 flagsMask, flagsValues, options); 7606 } else if (options != null) { 7607 mParent.startIntentSenderFromChildFragment(fragment, intent, requestCode, 7608 fillInIntent, flagsMask, flagsValues, extraFlags, options); 7609 } 7610 } 7611 7612 @Override 7613 public void onRequestPermissionsFromFragment(Fragment fragment, String[] permissions, 7614 int requestCode) { 7615 String who = REQUEST_PERMISSIONS_WHO_PREFIX + fragment.mWho; 7616 Intent intent = getPackageManager().buildRequestPermissionsIntent(permissions); 7617 startActivityForResult(who, intent, requestCode, null); 7618 } 7619 7620 @Override 7621 public boolean onHasWindowAnimations() { 7622 return getWindow() != null; 7623 } 7624 7625 @Override 7626 public int onGetWindowAnimations() { 7627 final Window w = getWindow(); 7628 return (w == null) ? 0 : w.getAttributes().windowAnimations; 7629 } 7630 7631 @Override 7632 public void onAttachFragment(Fragment fragment) { 7633 Activity.this.onAttachFragment(fragment); 7634 } 7635 7636 @Nullable 7637 @Override 7638 public <T extends View> T onFindViewById(int id) { 7639 return Activity.this.findViewById(id); 7640 } 7641 7642 @Override 7643 public boolean onHasView() { 7644 final Window w = getWindow(); 7645 return (w != null && w.peekDecorView() != null); 7646 } 7647 } 7648} 7649