Activity.java revision e84ad491c82168228f042644285a2581fc619baf
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 com.android.internal.annotations.GuardedBy; 20import com.android.internal.app.IVoiceInteractor; 21import com.android.internal.app.ToolbarActionBar; 22import com.android.internal.app.WindowDecorActionBar; 23import com.android.internal.policy.PhoneWindow; 24 25import android.annotation.CallSuper; 26import android.annotation.DrawableRes; 27import android.annotation.IdRes; 28import android.annotation.IntDef; 29import android.annotation.LayoutRes; 30import android.annotation.MainThread; 31import android.annotation.NonNull; 32import android.annotation.Nullable; 33import android.annotation.RequiresPermission; 34import android.annotation.StyleRes; 35import android.annotation.SystemApi; 36import android.app.VoiceInteractor.Request; 37import android.app.admin.DevicePolicyManager; 38import android.app.assist.AssistContent; 39import android.content.ComponentCallbacks2; 40import android.content.ComponentName; 41import android.content.ContentResolver; 42import android.content.Context; 43import android.content.CursorLoader; 44import android.content.IIntentSender; 45import android.content.Intent; 46import android.content.IntentSender; 47import android.content.SharedPreferences; 48import android.content.pm.ActivityInfo; 49import android.content.pm.ApplicationInfo; 50import android.content.pm.PackageManager; 51import android.content.pm.PackageManager.NameNotFoundException; 52import android.content.pm.ParceledListSlice; 53import android.content.res.Configuration; 54import android.content.res.Resources; 55import android.content.res.TypedArray; 56import android.database.Cursor; 57import android.graphics.Bitmap; 58import android.graphics.Canvas; 59import android.graphics.Color; 60import android.graphics.drawable.Drawable; 61import android.media.AudioManager; 62import android.media.session.MediaController; 63import android.net.Uri; 64import android.os.BadParcelableException; 65import android.os.Build; 66import android.os.Bundle; 67import android.os.Handler; 68import android.os.IBinder; 69import android.os.Looper; 70import android.os.Parcelable; 71import android.os.PersistableBundle; 72import android.os.RemoteException; 73import android.os.ServiceManager.ServiceNotFoundException; 74import android.os.StrictMode; 75import android.os.SystemProperties; 76import android.os.UserHandle; 77import android.service.autofill.AutoFillService; 78import android.service.autofill.IAutoFillAppCallback; 79import android.text.Selection; 80import android.text.SpannableStringBuilder; 81import android.text.TextUtils; 82import android.text.method.TextKeyListener; 83import android.transition.Scene; 84import android.transition.TransitionManager; 85import android.util.ArrayMap; 86import android.util.AttributeSet; 87import android.util.EventLog; 88import android.util.Log; 89import android.util.PrintWriterPrinter; 90import android.util.Slog; 91import android.util.SparseArray; 92import android.util.SuperNotCalledException; 93import android.view.ActionMode; 94import android.view.ContextMenu; 95import android.view.ContextMenu.ContextMenuInfo; 96import android.view.ContextThemeWrapper; 97import android.view.DragAndDropPermissions; 98import android.view.DragEvent; 99import android.view.KeyEvent; 100import android.view.KeyboardShortcutGroup; 101import android.view.KeyboardShortcutInfo; 102import android.view.LayoutInflater; 103import android.view.Menu; 104import android.view.MenuInflater; 105import android.view.MenuItem; 106import android.view.MotionEvent; 107import android.view.SearchEvent; 108import android.view.View; 109import android.view.View.OnCreateContextMenuListener; 110import android.view.ViewGroup; 111import android.view.ViewGroup.LayoutParams; 112import android.view.ViewManager; 113import android.view.ViewRootImpl; 114import android.view.Window; 115import android.view.Window.WindowControllerCallback; 116import android.view.WindowManager; 117import android.view.WindowManagerGlobal; 118import android.view.accessibility.AccessibilityEvent; 119import android.view.autofill.AutoFillId; 120import android.view.autofill.Dataset; 121import android.view.autofill.DatasetField; 122import android.view.autofill.VirtualViewDelegate; 123import android.widget.AdapterView; 124import android.widget.Toast; 125import android.widget.Toolbar; 126 127import java.io.FileDescriptor; 128import java.io.PrintWriter; 129import java.lang.annotation.Retention; 130import java.lang.annotation.RetentionPolicy; 131import java.lang.ref.WeakReference; 132import java.util.ArrayList; 133import java.util.HashMap; 134import java.util.List; 135 136import static java.lang.Character.MIN_VALUE; 137 138/** 139 * An activity is a single, focused thing that the user can do. Almost all 140 * activities interact with the user, so the Activity class takes care of 141 * creating a window for you in which you can place your UI with 142 * {@link #setContentView}. While activities are often presented to the user 143 * as full-screen windows, they can also be used in other ways: as floating 144 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 145 * or embedded inside of another activity (using {@link ActivityGroup}). 146 * 147 * There are two methods almost all subclasses of Activity will implement: 148 * 149 * <ul> 150 * <li> {@link #onCreate} is where you initialize your activity. Most 151 * importantly, here you will usually call {@link #setContentView(int)} 152 * with a layout resource defining your UI, and using {@link #findViewById} 153 * to retrieve the widgets in that UI that you need to interact with 154 * programmatically. 155 * 156 * <li> {@link #onPause} is where you deal with the user leaving your 157 * activity. Most importantly, any changes made by the user should at this 158 * point be committed (usually to the 159 * {@link android.content.ContentProvider} holding the data). 160 * </ul> 161 * 162 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 163 * activity classes must have a corresponding 164 * {@link android.R.styleable#AndroidManifestActivity <activity>} 165 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 166 * 167 * <p>Topics covered here: 168 * <ol> 169 * <li><a href="#Fragments">Fragments</a> 170 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 171 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 172 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 173 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 174 * <li><a href="#Permissions">Permissions</a> 175 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 176 * </ol> 177 * 178 * <div class="special reference"> 179 * <h3>Developer Guides</h3> 180 * <p>The Activity class is an important part of an application's overall lifecycle, 181 * and the way activities are launched and put together is a fundamental 182 * part of the platform's application model. For a detailed perspective on the structure of an 183 * Android application and how activities behave, please read the 184 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 185 * <a href="{@docRoot}guide/components/tasks-and-back-stack.html">Tasks and Back Stack</a> 186 * developer guides.</p> 187 * 188 * <p>You can also find a detailed discussion about how to create activities in the 189 * <a href="{@docRoot}guide/components/activities.html">Activities</a> 190 * developer guide.</p> 191 * </div> 192 * 193 * <a name="Fragments"></a> 194 * <h3>Fragments</h3> 195 * 196 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 197 * implementations can make use of the {@link Fragment} class to better 198 * modularize their code, build more sophisticated user interfaces for larger 199 * screens, and help scale their application between small and large screens. 200 * 201 * <a name="ActivityLifecycle"></a> 202 * <h3>Activity Lifecycle</h3> 203 * 204 * <p>Activities in the system are managed as an <em>activity stack</em>. 205 * When a new activity is started, it is placed on the top of the stack 206 * and becomes the running activity -- the previous activity always remains 207 * below it in the stack, and will not come to the foreground again until 208 * the new activity exits.</p> 209 * 210 * <p>An activity has essentially four states:</p> 211 * <ul> 212 * <li> If an activity is in the foreground of the screen (at the top of 213 * the stack), 214 * it is <em>active</em> or <em>running</em>. </li> 215 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 216 * or transparent activity has focus on top of your activity), it 217 * is <em>paused</em>. A paused activity is completely alive (it 218 * maintains all state and member information and remains attached to 219 * the window manager), but can be killed by the system in extreme 220 * low memory situations. 221 * <li>If an activity is completely obscured by another activity, 222 * it is <em>stopped</em>. It still retains all state and member information, 223 * however, it is no longer visible to the user so its window is hidden 224 * and it will often be killed by the system when memory is needed 225 * elsewhere.</li> 226 * <li>If an activity is paused or stopped, the system can drop the activity 227 * from memory by either asking it to finish, or simply killing its 228 * process. When it is displayed again to the user, it must be 229 * completely restarted and restored to its previous state.</li> 230 * </ul> 231 * 232 * <p>The following diagram shows the important state paths of an Activity. 233 * The square rectangles represent callback methods you can implement to 234 * perform operations when the Activity moves between states. The colored 235 * ovals are major states the Activity can be in.</p> 236 * 237 * <p><img src="../../../images/activity_lifecycle.png" 238 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 239 * 240 * <p>There are three key loops you may be interested in monitoring within your 241 * activity: 242 * 243 * <ul> 244 * <li>The <b>entire lifetime</b> of an activity happens between the first call 245 * to {@link android.app.Activity#onCreate} through to a single final call 246 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 247 * of "global" state in onCreate(), and release all remaining resources in 248 * onDestroy(). For example, if it has a thread running in the background 249 * to download data from the network, it may create that thread in onCreate() 250 * and then stop the thread in onDestroy(). 251 * 252 * <li>The <b>visible lifetime</b> of an activity happens between a call to 253 * {@link android.app.Activity#onStart} until a corresponding call to 254 * {@link android.app.Activity#onStop}. During this time the user can see the 255 * activity on-screen, though it may not be in the foreground and interacting 256 * with the user. Between these two methods you can maintain resources that 257 * are needed to show the activity to the user. For example, you can register 258 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 259 * that impact your UI, and unregister it in onStop() when the user no 260 * longer sees what you are displaying. The onStart() and onStop() methods 261 * can be called multiple times, as the activity becomes visible and hidden 262 * to the user. 263 * 264 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 265 * {@link android.app.Activity#onResume} until a corresponding call to 266 * {@link android.app.Activity#onPause}. During this time the activity is 267 * in front of all other activities and interacting with the user. An activity 268 * can frequently go between the resumed and paused states -- for example when 269 * the device goes to sleep, when an activity result is delivered, when a new 270 * intent is delivered -- so the code in these methods should be fairly 271 * lightweight. 272 * </ul> 273 * 274 * <p>The entire lifecycle of an activity is defined by the following 275 * Activity methods. All of these are hooks that you can override 276 * to do appropriate work when the activity changes state. All 277 * activities will implement {@link android.app.Activity#onCreate} 278 * to do their initial setup; many will also implement 279 * {@link android.app.Activity#onPause} to commit changes to data and 280 * otherwise prepare to stop interacting with the user. You should always 281 * call up to your superclass when implementing these methods.</p> 282 * 283 * </p> 284 * <pre class="prettyprint"> 285 * public class Activity extends ApplicationContext { 286 * protected void onCreate(Bundle savedInstanceState); 287 * 288 * protected void onStart(); 289 * 290 * protected void onRestart(); 291 * 292 * protected void onResume(); 293 * 294 * protected void onPause(); 295 * 296 * protected void onStop(); 297 * 298 * protected void onDestroy(); 299 * } 300 * </pre> 301 * 302 * <p>In general the movement through an activity's lifecycle looks like 303 * this:</p> 304 * 305 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 306 * <colgroup align="left" span="3" /> 307 * <colgroup align="left" /> 308 * <colgroup align="center" /> 309 * <colgroup align="center" /> 310 * 311 * <thead> 312 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 313 * </thead> 314 * 315 * <tbody> 316 * <tr><td colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</td> 317 * <td>Called when the activity is first created. 318 * This is where you should do all of your normal static set up: 319 * create views, bind data to lists, etc. This method also 320 * provides you with a Bundle containing the activity's previously 321 * frozen state, if there was one. 322 * <p>Always followed by <code>onStart()</code>.</td> 323 * <td align="center">No</td> 324 * <td align="center"><code>onStart()</code></td> 325 * </tr> 326 * 327 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 328 * <td colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</td> 329 * <td>Called after your activity has been stopped, prior to it being 330 * started again. 331 * <p>Always followed by <code>onStart()</code></td> 332 * <td align="center">No</td> 333 * <td align="center"><code>onStart()</code></td> 334 * </tr> 335 * 336 * <tr><td colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</td> 337 * <td>Called when the activity is becoming visible to the user. 338 * <p>Followed by <code>onResume()</code> if the activity comes 339 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 340 * <td align="center">No</td> 341 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 342 * </tr> 343 * 344 * <tr><td rowspan="2" style="border-left: none;"> </td> 345 * <td align="left" border="0">{@link android.app.Activity#onResume onResume()}</td> 346 * <td>Called when the activity will start 347 * interacting with the user. At this point your activity is at 348 * the top of the activity stack, with user input going to it. 349 * <p>Always followed by <code>onPause()</code>.</td> 350 * <td align="center">No</td> 351 * <td align="center"><code>onPause()</code></td> 352 * </tr> 353 * 354 * <tr><td align="left" border="0">{@link android.app.Activity#onPause onPause()}</td> 355 * <td>Called when the system is about to start resuming a previous 356 * activity. This is typically used to commit unsaved changes to 357 * persistent data, stop animations and other things that may be consuming 358 * CPU, etc. Implementations of this method must be very quick because 359 * the next activity will not be resumed until this method returns. 360 * <p>Followed by either <code>onResume()</code> if the activity 361 * returns back to the front, or <code>onStop()</code> if it becomes 362 * invisible to the user.</td> 363 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 364 * <td align="center"><code>onResume()</code> or<br> 365 * <code>onStop()</code></td> 366 * </tr> 367 * 368 * <tr><td colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</td> 369 * <td>Called when the activity is no longer visible to the user, because 370 * another activity has been resumed and is covering this one. This 371 * may happen either because a new activity is being started, an existing 372 * one is being brought in front of this one, or this one is being 373 * destroyed. 374 * <p>Followed by either <code>onRestart()</code> if 375 * this activity is coming back to interact with the user, or 376 * <code>onDestroy()</code> if this activity is going away.</td> 377 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 378 * <td align="center"><code>onRestart()</code> or<br> 379 * <code>onDestroy()</code></td> 380 * </tr> 381 * 382 * <tr><td colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</td> 383 * <td>The final call you receive before your 384 * activity is destroyed. This can happen either because the 385 * activity is finishing (someone called {@link Activity#finish} on 386 * it, or because the system is temporarily destroying this 387 * instance of the activity to save space. You can distinguish 388 * between these two scenarios with the {@link 389 * Activity#isFinishing} method.</td> 390 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 391 * <td align="center"><em>nothing</em></td> 392 * </tr> 393 * </tbody> 394 * </table> 395 * 396 * <p>Note the "Killable" column in the above table -- for those methods that 397 * are marked as being killable, after that method returns the process hosting the 398 * activity may be killed by the system <em>at any time</em> without another line 399 * of its code being executed. Because of this, you should use the 400 * {@link #onPause} method to write any persistent data (such as user edits) 401 * to storage. In addition, the method 402 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 403 * in such a background state, allowing you to save away any dynamic instance 404 * state in your activity into the given Bundle, to be later received in 405 * {@link #onCreate} if the activity needs to be re-created. 406 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 407 * section for more information on how the lifecycle of a process is tied 408 * to the activities it is hosting. Note that it is important to save 409 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 410 * because the latter is not part of the lifecycle callbacks, so will not 411 * be called in every situation as described in its documentation.</p> 412 * 413 * <p class="note">Be aware that these semantics will change slightly between 414 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 415 * vs. those targeting prior platforms. Starting with Honeycomb, an application 416 * is not in the killable state until its {@link #onStop} has returned. This 417 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 418 * safely called after {@link #onPause()} and allows and application to safely 419 * wait until {@link #onStop()} to save persistent state.</p> 420 * 421 * <p>For those methods that are not marked as being killable, the activity's 422 * process will not be killed by the system starting from the time the method 423 * is called and continuing after it returns. Thus an activity is in the killable 424 * state, for example, between after <code>onPause()</code> to the start of 425 * <code>onResume()</code>.</p> 426 * 427 * <a name="ConfigurationChanges"></a> 428 * <h3>Configuration Changes</h3> 429 * 430 * <p>If the configuration of the device (as defined by the 431 * {@link Configuration Resources.Configuration} class) changes, 432 * then anything displaying a user interface will need to update to match that 433 * configuration. Because Activity is the primary mechanism for interacting 434 * with the user, it includes special support for handling configuration 435 * changes.</p> 436 * 437 * <p>Unless you specify otherwise, a configuration change (such as a change 438 * in screen orientation, language, input devices, etc) will cause your 439 * current activity to be <em>destroyed</em>, going through the normal activity 440 * lifecycle process of {@link #onPause}, 441 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 442 * had been in the foreground or visible to the user, once {@link #onDestroy} is 443 * called in that instance then a new instance of the activity will be 444 * created, with whatever savedInstanceState the previous instance had generated 445 * from {@link #onSaveInstanceState}.</p> 446 * 447 * <p>This is done because any application resource, 448 * including layout files, can change based on any configuration value. Thus 449 * the only safe way to handle a configuration change is to re-retrieve all 450 * resources, including layouts, drawables, and strings. Because activities 451 * must already know how to save their state and re-create themselves from 452 * that state, this is a convenient way to have an activity restart itself 453 * with a new configuration.</p> 454 * 455 * <p>In some special cases, you may want to bypass restarting of your 456 * activity based on one or more types of configuration changes. This is 457 * done with the {@link android.R.attr#configChanges android:configChanges} 458 * attribute in its manifest. For any types of configuration changes you say 459 * that you handle there, you will receive a call to your current activity's 460 * {@link #onConfigurationChanged} method instead of being restarted. If 461 * a configuration change involves any that you do not handle, however, the 462 * activity will still be restarted and {@link #onConfigurationChanged} 463 * will not be called.</p> 464 * 465 * <a name="StartingActivities"></a> 466 * <h3>Starting Activities and Getting Results</h3> 467 * 468 * <p>The {@link android.app.Activity#startActivity} 469 * method is used to start a 470 * new activity, which will be placed at the top of the activity stack. It 471 * takes a single argument, an {@link android.content.Intent Intent}, 472 * which describes the activity 473 * to be executed.</p> 474 * 475 * <p>Sometimes you want to get a result back from an activity when it 476 * ends. For example, you may start an activity that lets the user pick 477 * a person in a list of contacts; when it ends, it returns the person 478 * that was selected. To do this, you call the 479 * {@link android.app.Activity#startActivityForResult(Intent, int)} 480 * version with a second integer parameter identifying the call. The result 481 * will come back through your {@link android.app.Activity#onActivityResult} 482 * method.</p> 483 * 484 * <p>When an activity exits, it can call 485 * {@link android.app.Activity#setResult(int)} 486 * to return data back to its parent. It must always supply a result code, 487 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 488 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 489 * return back an Intent containing any additional data it wants. All of this 490 * information appears back on the 491 * parent's <code>Activity.onActivityResult()</code>, along with the integer 492 * identifier it originally supplied.</p> 493 * 494 * <p>If a child activity fails for any reason (such as crashing), the parent 495 * activity will receive a result with the code RESULT_CANCELED.</p> 496 * 497 * <pre class="prettyprint"> 498 * public class MyActivity extends Activity { 499 * ... 500 * 501 * static final int PICK_CONTACT_REQUEST = 0; 502 * 503 * public boolean onKeyDown(int keyCode, KeyEvent event) { 504 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 505 * // When the user center presses, let them pick a contact. 506 * startActivityForResult( 507 * new Intent(Intent.ACTION_PICK, 508 * new Uri("content://contacts")), 509 * PICK_CONTACT_REQUEST); 510 * return true; 511 * } 512 * return false; 513 * } 514 * 515 * protected void onActivityResult(int requestCode, int resultCode, 516 * Intent data) { 517 * if (requestCode == PICK_CONTACT_REQUEST) { 518 * if (resultCode == RESULT_OK) { 519 * // A contact was picked. Here we will just display it 520 * // to the user. 521 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 522 * } 523 * } 524 * } 525 * } 526 * </pre> 527 * 528 * <a name="SavingPersistentState"></a> 529 * <h3>Saving Persistent State</h3> 530 * 531 * <p>There are generally two kinds of persistent state than an activity 532 * will deal with: shared document-like data (typically stored in a SQLite 533 * database using a {@linkplain android.content.ContentProvider content provider}) 534 * and internal state such as user preferences.</p> 535 * 536 * <p>For content provider data, we suggest that activities use a 537 * "edit in place" user model. That is, any edits a user makes are effectively 538 * made immediately without requiring an additional confirmation step. 539 * Supporting this model is generally a simple matter of following two rules:</p> 540 * 541 * <ul> 542 * <li> <p>When creating a new document, the backing database entry or file for 543 * it is created immediately. For example, if the user chooses to write 544 * a new e-mail, a new entry for that e-mail is created as soon as they 545 * start entering data, so that if they go to any other activity after 546 * that point this e-mail will now appear in the list of drafts.</p> 547 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 548 * commit to the backing content provider or file any changes the user 549 * has made. This ensures that those changes will be seen by any other 550 * activity that is about to run. You will probably want to commit 551 * your data even more aggressively at key times during your 552 * activity's lifecycle: for example before starting a new 553 * activity, before finishing your own activity, when the user 554 * switches between input fields, etc.</p> 555 * </ul> 556 * 557 * <p>This model is designed to prevent data loss when a user is navigating 558 * between activities, and allows the system to safely kill an activity (because 559 * system resources are needed somewhere else) at any time after it has been 560 * paused. Note this implies 561 * that the user pressing BACK from your activity does <em>not</em> 562 * mean "cancel" -- it means to leave the activity with its current contents 563 * saved away. Canceling edits in an activity must be provided through 564 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 565 * 566 * <p>See the {@linkplain android.content.ContentProvider content package} for 567 * more information about content providers. These are a key aspect of how 568 * different activities invoke and propagate data between themselves.</p> 569 * 570 * <p>The Activity class also provides an API for managing internal persistent state 571 * associated with an activity. This can be used, for example, to remember 572 * the user's preferred initial display in a calendar (day view or week view) 573 * or the user's default home page in a web browser.</p> 574 * 575 * <p>Activity persistent state is managed 576 * with the method {@link #getPreferences}, 577 * allowing you to retrieve and 578 * modify a set of name/value pairs associated with the activity. To use 579 * preferences that are shared across multiple application components 580 * (activities, receivers, services, providers), you can use the underlying 581 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 582 * to retrieve a preferences 583 * object stored under a specific name. 584 * (Note that it is not possible to share settings data across application 585 * packages -- for that you will need a content provider.)</p> 586 * 587 * <p>Here is an excerpt from a calendar activity that stores the user's 588 * preferred view mode in its persistent settings:</p> 589 * 590 * <pre class="prettyprint"> 591 * public class CalendarActivity extends Activity { 592 * ... 593 * 594 * static final int DAY_VIEW_MODE = 0; 595 * static final int WEEK_VIEW_MODE = 1; 596 * 597 * private SharedPreferences mPrefs; 598 * private int mCurViewMode; 599 * 600 * protected void onCreate(Bundle savedInstanceState) { 601 * super.onCreate(savedInstanceState); 602 * 603 * SharedPreferences mPrefs = getSharedPreferences(); 604 * mCurViewMode = mPrefs.getInt("view_mode", DAY_VIEW_MODE); 605 * } 606 * 607 * protected void onPause() { 608 * super.onPause(); 609 * 610 * SharedPreferences.Editor ed = mPrefs.edit(); 611 * ed.putInt("view_mode", mCurViewMode); 612 * ed.commit(); 613 * } 614 * } 615 * </pre> 616 * 617 * <a name="Permissions"></a> 618 * <h3>Permissions</h3> 619 * 620 * <p>The ability to start a particular Activity can be enforced when it is 621 * declared in its 622 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 623 * tag. By doing so, other applications will need to declare a corresponding 624 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 625 * element in their own manifest to be able to start that activity. 626 * 627 * <p>When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 628 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 629 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the 630 * Activity access to the specific URIs in the Intent. Access will remain 631 * until the Activity has finished (it will remain across the hosting 632 * process being killed and other temporary destruction). As of 633 * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity 634 * was already created and a new Intent is being delivered to 635 * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added 636 * to the existing ones it holds. 637 * 638 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 639 * document for more information on permissions and security in general. 640 * 641 * <a name="ProcessLifecycle"></a> 642 * <h3>Process Lifecycle</h3> 643 * 644 * <p>The Android system attempts to keep application process around for as 645 * long as possible, but eventually will need to remove old processes when 646 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 647 * Lifecycle</a>, the decision about which process to remove is intimately 648 * tied to the state of the user's interaction with it. In general, there 649 * are four states a process can be in based on the activities running in it, 650 * listed here in order of importance. The system will kill less important 651 * processes (the last ones) before it resorts to killing more important 652 * processes (the first ones). 653 * 654 * <ol> 655 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 656 * that the user is currently interacting with) is considered the most important. 657 * Its process will only be killed as a last resort, if it uses more memory 658 * than is available on the device. Generally at this point the device has 659 * reached a memory paging state, so this is required in order to keep the user 660 * interface responsive. 661 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 662 * but not in the foreground, such as one sitting behind a foreground dialog) 663 * is considered extremely important and will not be killed unless that is 664 * required to keep the foreground activity running. 665 * <li> <p>A <b>background activity</b> (an activity that is not visible to 666 * the user and has been paused) is no longer critical, so the system may 667 * safely kill its process to reclaim memory for other foreground or 668 * visible processes. If its process needs to be killed, when the user navigates 669 * back to the activity (making it visible on the screen again), its 670 * {@link #onCreate} method will be called with the savedInstanceState it had previously 671 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 672 * state as the user last left it. 673 * <li> <p>An <b>empty process</b> is one hosting no activities or other 674 * application components (such as {@link Service} or 675 * {@link android.content.BroadcastReceiver} classes). These are killed very 676 * quickly by the system as memory becomes low. For this reason, any 677 * background operation you do outside of an activity must be executed in the 678 * context of an activity BroadcastReceiver or Service to ensure that the system 679 * knows it needs to keep your process around. 680 * </ol> 681 * 682 * <p>Sometimes an Activity may need to do a long-running operation that exists 683 * independently of the activity lifecycle itself. An example may be a camera 684 * application that allows you to upload a picture to a web site. The upload 685 * may take a long time, and the application should allow the user to leave 686 * the application while it is executing. To accomplish this, your Activity 687 * should start a {@link Service} in which the upload takes place. This allows 688 * the system to properly prioritize your process (considering it to be more 689 * important than other non-visible applications) for the duration of the 690 * upload, independent of whether the original activity is paused, stopped, 691 * or finished. 692 */ 693public class Activity extends ContextThemeWrapper 694 implements LayoutInflater.Factory2, 695 Window.Callback, KeyEvent.Callback, 696 OnCreateContextMenuListener, ComponentCallbacks2, 697 Window.OnWindowDismissedCallback, WindowControllerCallback { 698 private static final String TAG = "Activity"; 699 private static final boolean DEBUG_LIFECYCLE = false; 700 701 // TODO(b/33197203): set to false once stable 702 private static final boolean DEBUG_AUTO_FILL = true; 703 704 /** Standard activity result: operation canceled. */ 705 public static final int RESULT_CANCELED = 0; 706 /** Standard activity result: operation succeeded. */ 707 public static final int RESULT_OK = -1; 708 /** Start of user-defined activity results. */ 709 public static final int RESULT_FIRST_USER = 1; 710 711 /** @hide Task isn't finished when activity is finished */ 712 public static final int DONT_FINISH_TASK_WITH_ACTIVITY = 0; 713 /** 714 * @hide Task is finished if the finishing activity is the root of the task. To preserve the 715 * past behavior the task is also removed from recents. 716 */ 717 public static final int FINISH_TASK_WITH_ROOT_ACTIVITY = 1; 718 /** 719 * @hide Task is finished along with the finishing activity, but it is not removed from 720 * recents. 721 */ 722 public static final int FINISH_TASK_WITH_ACTIVITY = 2; 723 724 static final String FRAGMENTS_TAG = "android:fragments"; 725 726 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 727 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 728 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 729 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 730 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 731 private static final String HAS_CURENT_PERMISSIONS_REQUEST_KEY = 732 "android:hasCurrentPermissionsRequest"; 733 734 private static final String REQUEST_PERMISSIONS_WHO_PREFIX = "@android:requestPermissions:"; 735 736 private static final String KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME = "com.android.systemui"; 737 738 private static class ManagedDialog { 739 Dialog mDialog; 740 Bundle mArgs; 741 } 742 private SparseArray<ManagedDialog> mManagedDialogs; 743 744 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 745 private Instrumentation mInstrumentation; 746 private IBinder mToken; 747 private int mIdent; 748 /*package*/ String mEmbeddedID; 749 private Application mApplication; 750 /*package*/ Intent mIntent; 751 /*package*/ String mReferrer; 752 private ComponentName mComponent; 753 /*package*/ ActivityInfo mActivityInfo; 754 /*package*/ ActivityThread mMainThread; 755 Activity mParent; 756 boolean mCalled; 757 /*package*/ boolean mResumed; 758 /*package*/ boolean mStopped; 759 boolean mFinished; 760 boolean mStartedActivity; 761 private boolean mDestroyed; 762 private boolean mDoReportFullyDrawn = true; 763 /** true if the activity is going through a transient pause */ 764 /*package*/ boolean mTemporaryPause = false; 765 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 766 /*package*/ boolean mChangingConfigurations = false; 767 /*package*/ int mConfigChangeFlags; 768 /*package*/ Configuration mCurrentConfig; 769 private SearchManager mSearchManager; 770 private MenuInflater mMenuInflater; 771 772 static final class NonConfigurationInstances { 773 Object activity; 774 HashMap<String, Object> children; 775 FragmentManagerNonConfig fragments; 776 ArrayMap<String, LoaderManager> loaders; 777 VoiceInteractor voiceInteractor; 778 } 779 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 780 781 private Window mWindow; 782 783 private WindowManager mWindowManager; 784 /*package*/ View mDecor = null; 785 /*package*/ boolean mWindowAdded = false; 786 /*package*/ boolean mVisibleFromServer = false; 787 /*package*/ boolean mVisibleFromClient = true; 788 /*package*/ ActionBar mActionBar = null; 789 private boolean mEnableDefaultActionBarUp; 790 791 private VoiceInteractor mVoiceInteractor; 792 793 private CharSequence mTitle; 794 private int mTitleColor = 0; 795 796 // we must have a handler before the FragmentController is constructed 797 final Handler mHandler = new Handler(); 798 final FragmentController mFragments = FragmentController.createController(new HostCallbacks()); 799 800 // Most recent call to requestVisibleBehind(). 801 boolean mVisibleBehind; 802 803 private static final class ManagedCursor { 804 ManagedCursor(Cursor cursor) { 805 mCursor = cursor; 806 mReleased = false; 807 mUpdated = false; 808 } 809 810 private final Cursor mCursor; 811 private boolean mReleased; 812 private boolean mUpdated; 813 } 814 815 @GuardedBy("mManagedCursors") 816 private final ArrayList<ManagedCursor> mManagedCursors = new ArrayList<>(); 817 818 @GuardedBy("this") 819 int mResultCode = RESULT_CANCELED; 820 @GuardedBy("this") 821 Intent mResultData = null; 822 823 private TranslucentConversionListener mTranslucentCallback; 824 private boolean mChangeCanvasToTranslucent; 825 826 private SearchEvent mSearchEvent; 827 828 private boolean mTitleReady = false; 829 private int mActionModeTypeStarting = ActionMode.TYPE_PRIMARY; 830 831 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 832 private SpannableStringBuilder mDefaultKeySsb = null; 833 834 private ActivityManager.TaskDescription mTaskDescription = 835 new ActivityManager.TaskDescription(); 836 837 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 838 839 @SuppressWarnings("unused") 840 private final Object mInstanceTracker = StrictMode.trackActivity(this); 841 842 private Thread mUiThread; 843 844 ActivityTransitionState mActivityTransitionState = new ActivityTransitionState(); 845 SharedElementCallback mEnterTransitionListener = SharedElementCallback.NULL_CALLBACK; 846 SharedElementCallback mExitTransitionListener = SharedElementCallback.NULL_CALLBACK; 847 848 private boolean mHasCurrentPermissionsRequest; 849 850 @GuardedBy("this") 851 private WeakReference<IAutoFillAppCallback> mAutoFillCallback; 852 853 @GuardedBy("this") 854 private VirtualViewDelegate.Callback mAutoFillDelegateCallback; 855 856 private static native String getDlWarning(); 857 858 /** Return the intent that started this activity. */ 859 public Intent getIntent() { 860 return mIntent; 861 } 862 863 /** 864 * Change the intent returned by {@link #getIntent}. This holds a 865 * reference to the given intent; it does not copy it. Often used in 866 * conjunction with {@link #onNewIntent}. 867 * 868 * @param newIntent The new Intent object to return from getIntent 869 * 870 * @see #getIntent 871 * @see #onNewIntent 872 */ 873 public void setIntent(Intent newIntent) { 874 mIntent = newIntent; 875 } 876 877 /** Return the application that owns this activity. */ 878 public final Application getApplication() { 879 return mApplication; 880 } 881 882 /** Is this activity embedded inside of another activity? */ 883 public final boolean isChild() { 884 return mParent != null; 885 } 886 887 /** Return the parent activity if this view is an embedded child. */ 888 public final Activity getParent() { 889 return mParent; 890 } 891 892 /** Retrieve the window manager for showing custom windows. */ 893 public WindowManager getWindowManager() { 894 return mWindowManager; 895 } 896 897 /** 898 * Retrieve the current {@link android.view.Window} for the activity. 899 * This can be used to directly access parts of the Window API that 900 * are not available through Activity/Screen. 901 * 902 * @return Window The current window, or null if the activity is not 903 * visual. 904 */ 905 public Window getWindow() { 906 return mWindow; 907 } 908 909 /** 910 * Return the LoaderManager for this activity, creating it if needed. 911 */ 912 public LoaderManager getLoaderManager() { 913 return mFragments.getLoaderManager(); 914 } 915 916 /** 917 * Calls {@link android.view.Window#getCurrentFocus} on the 918 * Window of this Activity to return the currently focused view. 919 * 920 * @return View The current View with focus or null. 921 * 922 * @see #getWindow 923 * @see android.view.Window#getCurrentFocus 924 */ 925 @Nullable 926 public View getCurrentFocus() { 927 return mWindow != null ? mWindow.getCurrentFocus() : null; 928 } 929 930 /** 931 * Called when the activity is starting. This is where most initialization 932 * should go: calling {@link #setContentView(int)} to inflate the 933 * activity's UI, using {@link #findViewById} to programmatically interact 934 * with widgets in the UI, calling 935 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 936 * cursors for data being displayed, etc. 937 * 938 * <p>You can call {@link #finish} from within this function, in 939 * which case onDestroy() will be immediately called without any of the rest 940 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 941 * {@link #onPause}, etc) executing. 942 * 943 * <p><em>Derived classes must call through to the super class's 944 * implementation of this method. If they do not, an exception will be 945 * thrown.</em></p> 946 * 947 * @param savedInstanceState If the activity is being re-initialized after 948 * previously being shut down then this Bundle contains the data it most 949 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 950 * 951 * @see #onStart 952 * @see #onSaveInstanceState 953 * @see #onRestoreInstanceState 954 * @see #onPostCreate 955 */ 956 @MainThread 957 @CallSuper 958 protected void onCreate(@Nullable Bundle savedInstanceState) { 959 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState); 960 if (mLastNonConfigurationInstances != null) { 961 mFragments.restoreLoaderNonConfig(mLastNonConfigurationInstances.loaders); 962 } 963 if (mActivityInfo.parentActivityName != null) { 964 if (mActionBar == null) { 965 mEnableDefaultActionBarUp = true; 966 } else { 967 mActionBar.setDefaultDisplayHomeAsUpEnabled(true); 968 } 969 } 970 if (savedInstanceState != null) { 971 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 972 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 973 ? mLastNonConfigurationInstances.fragments : null); 974 } 975 mFragments.dispatchCreate(); 976 getApplication().dispatchActivityCreated(this, savedInstanceState); 977 if (mVoiceInteractor != null) { 978 mVoiceInteractor.attachActivity(this); 979 } 980 mCalled = true; 981 } 982 983 /** 984 * Same as {@link #onCreate(android.os.Bundle)} but called for those activities created with 985 * the attribute {@link android.R.attr#persistableMode} set to 986 * <code>persistAcrossReboots</code>. 987 * 988 * @param savedInstanceState if the activity is being re-initialized after 989 * previously being shut down then this Bundle contains the data it most 990 * recently supplied in {@link #onSaveInstanceState}. 991 * <b><i>Note: Otherwise it is null.</i></b> 992 * @param persistentState if the activity is being re-initialized after 993 * previously being shut down or powered off then this Bundle contains the data it most 994 * recently supplied to outPersistentState in {@link #onSaveInstanceState}. 995 * <b><i>Note: Otherwise it is null.</i></b> 996 * 997 * @see #onCreate(android.os.Bundle) 998 * @see #onStart 999 * @see #onSaveInstanceState 1000 * @see #onRestoreInstanceState 1001 * @see #onPostCreate 1002 */ 1003 public void onCreate(@Nullable Bundle savedInstanceState, 1004 @Nullable PersistableBundle persistentState) { 1005 onCreate(savedInstanceState); 1006 } 1007 1008 /** 1009 * The hook for {@link ActivityThread} to restore the state of this activity. 1010 * 1011 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 1012 * {@link #restoreManagedDialogs(android.os.Bundle)}. 1013 * 1014 * @param savedInstanceState contains the saved state 1015 */ 1016 final void performRestoreInstanceState(Bundle savedInstanceState) { 1017 onRestoreInstanceState(savedInstanceState); 1018 restoreManagedDialogs(savedInstanceState); 1019 } 1020 1021 /** 1022 * The hook for {@link ActivityThread} to restore the state of this activity. 1023 * 1024 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 1025 * {@link #restoreManagedDialogs(android.os.Bundle)}. 1026 * 1027 * @param savedInstanceState contains the saved state 1028 * @param persistentState contains the persistable saved state 1029 */ 1030 final void performRestoreInstanceState(Bundle savedInstanceState, 1031 PersistableBundle persistentState) { 1032 onRestoreInstanceState(savedInstanceState, persistentState); 1033 if (savedInstanceState != null) { 1034 restoreManagedDialogs(savedInstanceState); 1035 } 1036 } 1037 1038 /** 1039 * This method is called after {@link #onStart} when the activity is 1040 * being re-initialized from a previously saved state, given here in 1041 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 1042 * to restore their state, but it is sometimes convenient to do it here 1043 * after all of the initialization has been done or to allow subclasses to 1044 * decide whether to use your default implementation. The default 1045 * implementation of this method performs a restore of any view state that 1046 * had previously been frozen by {@link #onSaveInstanceState}. 1047 * 1048 * <p>This method is called between {@link #onStart} and 1049 * {@link #onPostCreate}. 1050 * 1051 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1052 * 1053 * @see #onCreate 1054 * @see #onPostCreate 1055 * @see #onResume 1056 * @see #onSaveInstanceState 1057 */ 1058 protected void onRestoreInstanceState(Bundle savedInstanceState) { 1059 if (mWindow != null) { 1060 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 1061 if (windowState != null) { 1062 mWindow.restoreHierarchyState(windowState); 1063 } 1064 } 1065 } 1066 1067 /** 1068 * This is the same as {@link #onRestoreInstanceState(Bundle)} but is called for activities 1069 * created with the attribute {@link android.R.attr#persistableMode} set to 1070 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1071 * came from the restored PersistableBundle first 1072 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1073 * 1074 * <p>This method is called between {@link #onStart} and 1075 * {@link #onPostCreate}. 1076 * 1077 * <p>If this method is called {@link #onRestoreInstanceState(Bundle)} will not be called. 1078 * 1079 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1080 * @param persistentState the data most recently supplied in {@link #onSaveInstanceState}. 1081 * 1082 * @see #onRestoreInstanceState(Bundle) 1083 * @see #onCreate 1084 * @see #onPostCreate 1085 * @see #onResume 1086 * @see #onSaveInstanceState 1087 */ 1088 public void onRestoreInstanceState(Bundle savedInstanceState, 1089 PersistableBundle persistentState) { 1090 if (savedInstanceState != null) { 1091 onRestoreInstanceState(savedInstanceState); 1092 } 1093 } 1094 1095 /** 1096 * Restore the state of any saved managed dialogs. 1097 * 1098 * @param savedInstanceState The bundle to restore from. 1099 */ 1100 private void restoreManagedDialogs(Bundle savedInstanceState) { 1101 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 1102 if (b == null) { 1103 return; 1104 } 1105 1106 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 1107 final int numDialogs = ids.length; 1108 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 1109 for (int i = 0; i < numDialogs; i++) { 1110 final Integer dialogId = ids[i]; 1111 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 1112 if (dialogState != null) { 1113 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 1114 // so tell createDialog() not to do it, otherwise we get an exception 1115 final ManagedDialog md = new ManagedDialog(); 1116 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 1117 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 1118 if (md.mDialog != null) { 1119 mManagedDialogs.put(dialogId, md); 1120 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 1121 md.mDialog.onRestoreInstanceState(dialogState); 1122 } 1123 } 1124 } 1125 } 1126 1127 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 1128 final Dialog dialog = onCreateDialog(dialogId, args); 1129 if (dialog == null) { 1130 return null; 1131 } 1132 dialog.dispatchOnCreate(state); 1133 return dialog; 1134 } 1135 1136 private static String savedDialogKeyFor(int key) { 1137 return SAVED_DIALOG_KEY_PREFIX + key; 1138 } 1139 1140 private static String savedDialogArgsKeyFor(int key) { 1141 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 1142 } 1143 1144 /** 1145 * Called when activity start-up is complete (after {@link #onStart} 1146 * and {@link #onRestoreInstanceState} have been called). Applications will 1147 * generally not implement this method; it is intended for system 1148 * classes to do final initialization after application code has run. 1149 * 1150 * <p><em>Derived classes must call through to the super class's 1151 * implementation of this method. If they do not, an exception will be 1152 * thrown.</em></p> 1153 * 1154 * @param savedInstanceState If the activity is being re-initialized after 1155 * previously being shut down then this Bundle contains the data it most 1156 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1157 * @see #onCreate 1158 */ 1159 @CallSuper 1160 protected void onPostCreate(@Nullable Bundle savedInstanceState) { 1161 if (!isChild()) { 1162 mTitleReady = true; 1163 onTitleChanged(getTitle(), getTitleColor()); 1164 } 1165 1166 mCalled = true; 1167 } 1168 1169 /** 1170 * This is the same as {@link #onPostCreate(Bundle)} but is called for activities 1171 * created with the attribute {@link android.R.attr#persistableMode} set to 1172 * <code>persistAcrossReboots</code>. 1173 * 1174 * @param savedInstanceState The data most recently supplied in {@link #onSaveInstanceState} 1175 * @param persistentState The data caming from the PersistableBundle first 1176 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1177 * 1178 * @see #onCreate 1179 */ 1180 public void onPostCreate(@Nullable Bundle savedInstanceState, 1181 @Nullable PersistableBundle persistentState) { 1182 onPostCreate(savedInstanceState); 1183 } 1184 1185 /** 1186 * Called after {@link #onCreate} — or after {@link #onRestart} when 1187 * the activity had been stopped, but is now again being displayed to the 1188 * user. It will be followed by {@link #onResume}. 1189 * 1190 * <p><em>Derived classes must call through to the super class's 1191 * implementation of this method. If they do not, an exception will be 1192 * thrown.</em></p> 1193 * 1194 * @see #onCreate 1195 * @see #onStop 1196 * @see #onResume 1197 */ 1198 @CallSuper 1199 protected void onStart() { 1200 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStart " + this); 1201 mCalled = true; 1202 1203 mFragments.doLoaderStart(); 1204 1205 getApplication().dispatchActivityStarted(this); 1206 } 1207 1208 /** 1209 * Called after {@link #onStop} when the current activity is being 1210 * re-displayed to the user (the user has navigated back to it). It will 1211 * be followed by {@link #onStart} and then {@link #onResume}. 1212 * 1213 * <p>For activities that are using raw {@link Cursor} objects (instead of 1214 * creating them through 1215 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1216 * this is usually the place 1217 * where the cursor should be requeried (because you had deactivated it in 1218 * {@link #onStop}. 1219 * 1220 * <p><em>Derived classes must call through to the super class's 1221 * implementation of this method. If they do not, an exception will be 1222 * thrown.</em></p> 1223 * 1224 * @see #onStop 1225 * @see #onStart 1226 * @see #onResume 1227 */ 1228 @CallSuper 1229 protected void onRestart() { 1230 mCalled = true; 1231 } 1232 1233 /** 1234 * Called when an {@link #onResume} is coming up, prior to other pre-resume callbacks 1235 * such as {@link #onNewIntent} and {@link #onActivityResult}. This is primarily intended 1236 * to give the activity a hint that its state is no longer saved -- it will generally 1237 * be called after {@link #onSaveInstanceState} and prior to the activity being 1238 * resumed/started again. 1239 */ 1240 public void onStateNotSaved() { 1241 } 1242 1243 /** 1244 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1245 * {@link #onPause}, for your activity to start interacting with the user. 1246 * This is a good place to begin animations, open exclusive-access devices 1247 * (such as the camera), etc. 1248 * 1249 * <p>Keep in mind that onResume is not the best indicator that your activity 1250 * is visible to the user; a system window such as the keyguard may be in 1251 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1252 * activity is visible to the user (for example, to resume a game). 1253 * 1254 * <p><em>Derived classes must call through to the super class's 1255 * implementation of this method. If they do not, an exception will be 1256 * thrown.</em></p> 1257 * 1258 * @see #onRestoreInstanceState 1259 * @see #onRestart 1260 * @see #onPostResume 1261 * @see #onPause 1262 */ 1263 @CallSuper 1264 protected void onResume() { 1265 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this); 1266 getApplication().dispatchActivityResumed(this); 1267 mActivityTransitionState.onResume(this, isTopOfTask()); 1268 mCalled = true; 1269 } 1270 1271 /** 1272 * Called when activity resume is complete (after {@link #onResume} has 1273 * been called). Applications will generally not implement this method; 1274 * it is intended for system classes to do final setup after application 1275 * resume code has run. 1276 * 1277 * <p><em>Derived classes must call through to the super class's 1278 * implementation of this method. If they do not, an exception will be 1279 * thrown.</em></p> 1280 * 1281 * @see #onResume 1282 */ 1283 @CallSuper 1284 protected void onPostResume() { 1285 final Window win = getWindow(); 1286 if (win != null) win.makeActive(); 1287 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1288 mCalled = true; 1289 } 1290 1291 void setVoiceInteractor(IVoiceInteractor voiceInteractor) { 1292 if (mVoiceInteractor != null) { 1293 for (Request activeRequest: mVoiceInteractor.getActiveRequests()) { 1294 activeRequest.cancel(); 1295 activeRequest.clear(); 1296 } 1297 } 1298 if (voiceInteractor == null) { 1299 mVoiceInteractor = null; 1300 } else { 1301 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 1302 Looper.myLooper()); 1303 } 1304 } 1305 1306 /** 1307 * Check whether this activity is running as part of a voice interaction with the user. 1308 * If true, it should perform its interaction with the user through the 1309 * {@link VoiceInteractor} returned by {@link #getVoiceInteractor}. 1310 */ 1311 public boolean isVoiceInteraction() { 1312 return mVoiceInteractor != null; 1313 } 1314 1315 /** 1316 * Like {@link #isVoiceInteraction}, but only returns true if this is also the root 1317 * of a voice interaction. That is, returns true if this activity was directly 1318 * started by the voice interaction service as the initiation of a voice interaction. 1319 * Otherwise, for example if it was started by another activity while under voice 1320 * interaction, returns false. 1321 */ 1322 public boolean isVoiceInteractionRoot() { 1323 try { 1324 return mVoiceInteractor != null 1325 && ActivityManager.getService().isRootVoiceInteraction(mToken); 1326 } catch (RemoteException e) { 1327 } 1328 return false; 1329 } 1330 1331 /** 1332 * Retrieve the active {@link VoiceInteractor} that the user is going through to 1333 * interact with this activity. 1334 */ 1335 public VoiceInteractor getVoiceInteractor() { 1336 return mVoiceInteractor; 1337 } 1338 1339 /** 1340 * Queries whether the currently enabled voice interaction service supports returning 1341 * a voice interactor for use by the activity. This is valid only for the duration of the 1342 * activity. 1343 * 1344 * @return whether the current voice interaction service supports local voice interaction 1345 */ 1346 public boolean isLocalVoiceInteractionSupported() { 1347 try { 1348 return ActivityManager.getService().supportsLocalVoiceInteraction(); 1349 } catch (RemoteException re) { 1350 } 1351 return false; 1352 } 1353 1354 /** 1355 * Starts a local voice interaction session. When ready, 1356 * {@link #onLocalVoiceInteractionStarted()} is called. You can pass a bundle of private options 1357 * to the registered voice interaction service. 1358 * @param privateOptions a Bundle of private arguments to the current voice interaction service 1359 */ 1360 public void startLocalVoiceInteraction(Bundle privateOptions) { 1361 try { 1362 ActivityManager.getService().startLocalVoiceInteraction(mToken, privateOptions); 1363 } catch (RemoteException re) { 1364 } 1365 } 1366 1367 /** 1368 * Callback to indicate that {@link #startLocalVoiceInteraction(Bundle)} has resulted in a 1369 * voice interaction session being started. You can now retrieve a voice interactor using 1370 * {@link #getVoiceInteractor()}. 1371 */ 1372 public void onLocalVoiceInteractionStarted() { 1373 } 1374 1375 /** 1376 * Callback to indicate that the local voice interaction has stopped either 1377 * because it was requested through a call to {@link #stopLocalVoiceInteraction()} 1378 * or because it was canceled by the user. The previously acquired {@link VoiceInteractor} 1379 * is no longer valid after this. 1380 */ 1381 public void onLocalVoiceInteractionStopped() { 1382 } 1383 1384 /** 1385 * Request to terminate the current voice interaction that was previously started 1386 * using {@link #startLocalVoiceInteraction(Bundle)}. When the interaction is 1387 * terminated, {@link #onLocalVoiceInteractionStopped()} will be called. 1388 */ 1389 public void stopLocalVoiceInteraction() { 1390 try { 1391 ActivityManager.getService().stopLocalVoiceInteraction(mToken); 1392 } catch (RemoteException re) { 1393 } 1394 } 1395 1396 /** 1397 * This is called for activities that set launchMode to "singleTop" in 1398 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1399 * flag when calling {@link #startActivity}. In either case, when the 1400 * activity is re-launched while at the top of the activity stack instead 1401 * of a new instance of the activity being started, onNewIntent() will be 1402 * called on the existing instance with the Intent that was used to 1403 * re-launch it. 1404 * 1405 * <p>An activity will always be paused before receiving a new intent, so 1406 * you can count on {@link #onResume} being called after this method. 1407 * 1408 * <p>Note that {@link #getIntent} still returns the original Intent. You 1409 * can use {@link #setIntent} to update it to this new Intent. 1410 * 1411 * @param intent The new intent that was started for the activity. 1412 * 1413 * @see #getIntent 1414 * @see #setIntent 1415 * @see #onResume 1416 */ 1417 protected void onNewIntent(Intent intent) { 1418 } 1419 1420 /** 1421 * The hook for {@link ActivityThread} to save the state of this activity. 1422 * 1423 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1424 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1425 * 1426 * @param outState The bundle to save the state to. 1427 */ 1428 final void performSaveInstanceState(Bundle outState) { 1429 onSaveInstanceState(outState); 1430 saveManagedDialogs(outState); 1431 mActivityTransitionState.saveState(outState); 1432 storeHasCurrentPermissionRequest(outState); 1433 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState); 1434 } 1435 1436 /** 1437 * The hook for {@link ActivityThread} to save the state of this activity. 1438 * 1439 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1440 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1441 * 1442 * @param outState The bundle to save the state to. 1443 * @param outPersistentState The bundle to save persistent state to. 1444 */ 1445 final void performSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1446 onSaveInstanceState(outState, outPersistentState); 1447 saveManagedDialogs(outState); 1448 storeHasCurrentPermissionRequest(outState); 1449 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState + 1450 ", " + outPersistentState); 1451 } 1452 1453 /** 1454 * Called to retrieve per-instance state from an activity before being killed 1455 * so that the state can be restored in {@link #onCreate} or 1456 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1457 * will be passed to both). 1458 * 1459 * <p>This method is called before an activity may be killed so that when it 1460 * comes back some time in the future it can restore its state. For example, 1461 * if activity B is launched in front of activity A, and at some point activity 1462 * A is killed to reclaim resources, activity A will have a chance to save the 1463 * current state of its user interface via this method so that when the user 1464 * returns to activity A, the state of the user interface can be restored 1465 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1466 * 1467 * <p>Do not confuse this method with activity lifecycle callbacks such as 1468 * {@link #onPause}, which is always called when an activity is being placed 1469 * in the background or on its way to destruction, or {@link #onStop} which 1470 * is called before destruction. One example of when {@link #onPause} and 1471 * {@link #onStop} is called and not this method is when a user navigates back 1472 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1473 * on B because that particular instance will never be restored, so the 1474 * system avoids calling it. An example when {@link #onPause} is called and 1475 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1476 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1477 * killed during the lifetime of B since the state of the user interface of 1478 * A will stay intact. 1479 * 1480 * <p>The default implementation takes care of most of the UI per-instance 1481 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1482 * view in the hierarchy that has an id, and by saving the id of the currently 1483 * focused view (all of which is restored by the default implementation of 1484 * {@link #onRestoreInstanceState}). If you override this method to save additional 1485 * information not captured by each individual view, you will likely want to 1486 * call through to the default implementation, otherwise be prepared to save 1487 * all of the state of each view yourself. 1488 * 1489 * <p>If called, this method will occur before {@link #onStop}. There are 1490 * no guarantees about whether it will occur before or after {@link #onPause}. 1491 * 1492 * @param outState Bundle in which to place your saved state. 1493 * 1494 * @see #onCreate 1495 * @see #onRestoreInstanceState 1496 * @see #onPause 1497 */ 1498 protected void onSaveInstanceState(Bundle outState) { 1499 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1500 Parcelable p = mFragments.saveAllState(); 1501 if (p != null) { 1502 outState.putParcelable(FRAGMENTS_TAG, p); 1503 } 1504 getApplication().dispatchActivitySaveInstanceState(this, outState); 1505 } 1506 1507 /** 1508 * This is the same as {@link #onSaveInstanceState} but is called for activities 1509 * created with the attribute {@link android.R.attr#persistableMode} set to 1510 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1511 * in will be saved and presented in {@link #onCreate(Bundle, PersistableBundle)} 1512 * the first time that this activity is restarted following the next device reboot. 1513 * 1514 * @param outState Bundle in which to place your saved state. 1515 * @param outPersistentState State which will be saved across reboots. 1516 * 1517 * @see #onSaveInstanceState(Bundle) 1518 * @see #onCreate 1519 * @see #onRestoreInstanceState(Bundle, PersistableBundle) 1520 * @see #onPause 1521 */ 1522 public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1523 onSaveInstanceState(outState); 1524 } 1525 1526 /** 1527 * Save the state of any managed dialogs. 1528 * 1529 * @param outState place to store the saved state. 1530 */ 1531 private void saveManagedDialogs(Bundle outState) { 1532 if (mManagedDialogs == null) { 1533 return; 1534 } 1535 1536 final int numDialogs = mManagedDialogs.size(); 1537 if (numDialogs == 0) { 1538 return; 1539 } 1540 1541 Bundle dialogState = new Bundle(); 1542 1543 int[] ids = new int[mManagedDialogs.size()]; 1544 1545 // save each dialog's bundle, gather the ids 1546 for (int i = 0; i < numDialogs; i++) { 1547 final int key = mManagedDialogs.keyAt(i); 1548 ids[i] = key; 1549 final ManagedDialog md = mManagedDialogs.valueAt(i); 1550 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1551 if (md.mArgs != null) { 1552 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1553 } 1554 } 1555 1556 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1557 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1558 } 1559 1560 1561 /** 1562 * Called as part of the activity lifecycle when an activity is going into 1563 * the background, but has not (yet) been killed. The counterpart to 1564 * {@link #onResume}. 1565 * 1566 * <p>When activity B is launched in front of activity A, this callback will 1567 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1568 * so be sure to not do anything lengthy here. 1569 * 1570 * <p>This callback is mostly used for saving any persistent state the 1571 * activity is editing, to present a "edit in place" model to the user and 1572 * making sure nothing is lost if there are not enough resources to start 1573 * the new activity without first killing this one. This is also a good 1574 * place to do things like stop animations and other things that consume a 1575 * noticeable amount of CPU in order to make the switch to the next activity 1576 * as fast as possible, or to close resources that are exclusive access 1577 * such as the camera. 1578 * 1579 * <p>In situations where the system needs more memory it may kill paused 1580 * processes to reclaim resources. Because of this, you should be sure 1581 * that all of your state is saved by the time you return from 1582 * this function. In general {@link #onSaveInstanceState} is used to save 1583 * per-instance state in the activity and this method is used to store 1584 * global persistent data (in content providers, files, etc.) 1585 * 1586 * <p>After receiving this call you will usually receive a following call 1587 * to {@link #onStop} (after the next activity has been resumed and 1588 * displayed), however in some cases there will be a direct call back to 1589 * {@link #onResume} without going through the stopped state. 1590 * 1591 * <p><em>Derived classes must call through to the super class's 1592 * implementation of this method. If they do not, an exception will be 1593 * thrown.</em></p> 1594 * 1595 * @see #onResume 1596 * @see #onSaveInstanceState 1597 * @see #onStop 1598 */ 1599 @CallSuper 1600 protected void onPause() { 1601 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this); 1602 getApplication().dispatchActivityPaused(this); 1603 mCalled = true; 1604 } 1605 1606 /** 1607 * Called as part of the activity lifecycle when an activity is about to go 1608 * into the background as the result of user choice. For example, when the 1609 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1610 * when an incoming phone call causes the in-call Activity to be automatically 1611 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1612 * the activity being interrupted. In cases when it is invoked, this method 1613 * is called right before the activity's {@link #onPause} callback. 1614 * 1615 * <p>This callback and {@link #onUserInteraction} are intended to help 1616 * activities manage status bar notifications intelligently; specifically, 1617 * for helping activities determine the proper time to cancel a notfication. 1618 * 1619 * @see #onUserInteraction() 1620 */ 1621 protected void onUserLeaveHint() { 1622 } 1623 1624 /** 1625 * Generate a new thumbnail for this activity. This method is called before 1626 * pausing the activity, and should draw into <var>outBitmap</var> the 1627 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1628 * can use the given <var>canvas</var>, which is configured to draw into the 1629 * bitmap, for rendering if desired. 1630 * 1631 * <p>The default implementation returns fails and does not draw a thumbnail; 1632 * this will result in the platform creating its own thumbnail if needed. 1633 * 1634 * @param outBitmap The bitmap to contain the thumbnail. 1635 * @param canvas Can be used to render into the bitmap. 1636 * 1637 * @return Return true if you have drawn into the bitmap; otherwise after 1638 * you return it will be filled with a default thumbnail. 1639 * 1640 * @see #onCreateDescription 1641 * @see #onSaveInstanceState 1642 * @see #onPause 1643 */ 1644 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1645 return false; 1646 } 1647 1648 /** 1649 * Generate a new description for this activity. This method is called 1650 * before pausing the activity and can, if desired, return some textual 1651 * description of its current state to be displayed to the user. 1652 * 1653 * <p>The default implementation returns null, which will cause you to 1654 * inherit the description from the previous activity. If all activities 1655 * return null, generally the label of the top activity will be used as the 1656 * description. 1657 * 1658 * @return A description of what the user is doing. It should be short and 1659 * sweet (only a few words). 1660 * 1661 * @see #onCreateThumbnail 1662 * @see #onSaveInstanceState 1663 * @see #onPause 1664 */ 1665 @Nullable 1666 public CharSequence onCreateDescription() { 1667 return null; 1668 } 1669 1670 /** 1671 * This is called when the user is requesting an assist, to build a full 1672 * {@link Intent#ACTION_ASSIST} Intent with all of the context of the current 1673 * application. You can override this method to place into the bundle anything 1674 * you would like to appear in the {@link Intent#EXTRA_ASSIST_CONTEXT} part 1675 * of the assist Intent. 1676 * 1677 * <p>This function will be called after any global assist callbacks that had 1678 * been registered with {@link Application#registerOnProvideAssistDataListener 1679 * Application.registerOnProvideAssistDataListener}. 1680 */ 1681 public void onProvideAssistData(Bundle data) { 1682 } 1683 1684 /** 1685 * This is called when the user is requesting an assist, to provide references 1686 * to content related to the current activity. Before being called, the 1687 * {@code outContent} Intent is filled with the base Intent of the activity (the Intent 1688 * returned by {@link #getIntent()}). The Intent's extras are stripped of any types 1689 * that are not valid for {@link PersistableBundle} or non-framework Parcelables, and 1690 * the flags {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION} and 1691 * {@link Intent#FLAG_GRANT_PERSISTABLE_URI_PERMISSION} are cleared from the Intent. 1692 * 1693 * <p>Custom implementation may adjust the content intent to better reflect the top-level 1694 * context of the activity, and fill in its ClipData with additional content of 1695 * interest that the user is currently viewing. For example, an image gallery application 1696 * that has launched in to an activity allowing the user to swipe through pictures should 1697 * modify the intent to reference the current image they are looking it; such an 1698 * application when showing a list of pictures should add a ClipData that has 1699 * references to all of the pictures currently visible on screen.</p> 1700 * 1701 * @param outContent The assist content to return. 1702 */ 1703 public void onProvideAssistContent(AssistContent outContent) { 1704 } 1705 1706 /** 1707 * Lazily sets the {@link #mAutoFillDelegateCallback}. 1708 */ 1709 private void setAutoFillDelegateCallback() { 1710 synchronized (this) { 1711 if (mAutoFillDelegateCallback == null) { 1712 mAutoFillDelegateCallback = new VirtualViewDelegate.Callback() { 1713 // TODO(b/33197203): implement 1714 }; 1715 } 1716 } 1717 } 1718 1719 /** 1720 * Lazily gets the {@link IAutoFillAppCallback} for this activitity. 1721 * 1722 * <p>This callback is used by the {@link AutoFillService} app to auto-fill the activity fields. 1723 */ 1724 WeakReference<IAutoFillAppCallback> getAutoFillCallback() { 1725 synchronized (this) { 1726 if (mAutoFillCallback == null) { 1727 final IAutoFillAppCallback cb = new IAutoFillAppCallback.Stub() { 1728 @Override 1729 public void autoFill(Dataset dataset) throws RemoteException { 1730 // TODO(b/33197203): must keep the dataset so subsequent calls pass the same 1731 // dataset.extras to service 1732 runOnUiThread(() -> { 1733 final View root = getWindow().getDecorView().getRootView(); 1734 for (DatasetField field : dataset.getFields()) { 1735 final AutoFillId id = field.getId(); 1736 if (id == null) { 1737 Log.w(TAG, "autoFill(): null id on " + field); 1738 continue; 1739 } 1740 final int viewId = id.getViewId(); 1741 final View view = root.findViewByAccessibilityIdTraversal(viewId); 1742 if (view == null) { 1743 Log.w(TAG, "autoFill(): no View with id " + viewId); 1744 continue; 1745 } 1746 1747 // TODO(b/33197203): handle protected value (like credit card) 1748 if (id.isVirtual()) { 1749 // Delegate virtual fields to provider. 1750 setAutoFillDelegateCallback(); 1751 final VirtualViewDelegate mgr = view 1752 .getAutoFillVirtualViewDelegate( 1753 mAutoFillDelegateCallback); 1754 if (mgr == null) { 1755 Log.w(TAG, "autoFill(): cannot fill virtual " + id 1756 + "; no auto-fill provider for view " 1757 + view.getClass()); 1758 continue; 1759 } 1760 if (DEBUG_AUTO_FILL) { 1761 Log.d(TAG, "autoFill(): delegating " + id 1762 + " to virtual manager " + mgr); 1763 } 1764 mgr.autoFill(id.getVirtualChildId(), field.getValue()); 1765 } else { 1766 // Handle non-virtual fields itself. 1767 view.autoFill(field.getValue()); 1768 } 1769 } 1770 }); 1771 } 1772 }; 1773 mAutoFillCallback = new WeakReference<IAutoFillAppCallback>(cb); 1774 } 1775 } 1776 return mAutoFillCallback; 1777 } 1778 1779 /** 1780 * Request the Keyboard Shortcuts screen to show up. This will trigger 1781 * {@link #onProvideKeyboardShortcuts} to retrieve the shortcuts for the foreground activity. 1782 */ 1783 public final void requestShowKeyboardShortcuts() { 1784 Intent intent = new Intent(Intent.ACTION_SHOW_KEYBOARD_SHORTCUTS); 1785 intent.setPackage(KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME); 1786 sendBroadcastAsUser(intent, UserHandle.SYSTEM); 1787 } 1788 1789 /** 1790 * Dismiss the Keyboard Shortcuts screen. 1791 */ 1792 public final void dismissKeyboardShortcutsHelper() { 1793 Intent intent = new Intent(Intent.ACTION_DISMISS_KEYBOARD_SHORTCUTS); 1794 intent.setPackage(KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME); 1795 sendBroadcastAsUser(intent, UserHandle.SYSTEM); 1796 } 1797 1798 @Override 1799 public void onProvideKeyboardShortcuts( 1800 List<KeyboardShortcutGroup> data, Menu menu, int deviceId) { 1801 if (menu == null) { 1802 return; 1803 } 1804 KeyboardShortcutGroup group = null; 1805 int menuSize = menu.size(); 1806 for (int i = 0; i < menuSize; ++i) { 1807 final MenuItem item = menu.getItem(i); 1808 final CharSequence title = item.getTitle(); 1809 final char alphaShortcut = item.getAlphabeticShortcut(); 1810 if (title != null && alphaShortcut != MIN_VALUE) { 1811 if (group == null) { 1812 final int resource = mApplication.getApplicationInfo().labelRes; 1813 group = new KeyboardShortcutGroup(resource != 0 ? getString(resource) : null); 1814 } 1815 group.addItem(new KeyboardShortcutInfo( 1816 title, alphaShortcut, KeyEvent.META_CTRL_ON)); 1817 } 1818 } 1819 if (group != null) { 1820 data.add(group); 1821 } 1822 } 1823 1824 /** 1825 * Ask to have the current assistant shown to the user. This only works if the calling 1826 * activity is the current foreground activity. It is the same as calling 1827 * {@link android.service.voice.VoiceInteractionService#showSession 1828 * VoiceInteractionService.showSession} and requesting all of the possible context. 1829 * The receiver will always see 1830 * {@link android.service.voice.VoiceInteractionSession#SHOW_SOURCE_APPLICATION} set. 1831 * @return Returns true if the assistant was successfully invoked, else false. For example 1832 * false will be returned if the caller is not the current top activity. 1833 */ 1834 public boolean showAssist(Bundle args) { 1835 try { 1836 return ActivityManager.getService().showAssistFromActivity(mToken, args); 1837 } catch (RemoteException e) { 1838 } 1839 return false; 1840 } 1841 1842 /** 1843 * Called when you are no longer visible to the user. You will next 1844 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1845 * depending on later user activity. 1846 * 1847 * <p><em>Derived classes must call through to the super class's 1848 * implementation of this method. If they do not, an exception will be 1849 * thrown.</em></p> 1850 * 1851 * @see #onRestart 1852 * @see #onResume 1853 * @see #onSaveInstanceState 1854 * @see #onDestroy 1855 */ 1856 @CallSuper 1857 protected void onStop() { 1858 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStop " + this); 1859 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1860 mActivityTransitionState.onStop(); 1861 getApplication().dispatchActivityStopped(this); 1862 mTranslucentCallback = null; 1863 mCalled = true; 1864 } 1865 1866 /** 1867 * Perform any final cleanup before an activity is destroyed. This can 1868 * happen either because the activity is finishing (someone called 1869 * {@link #finish} on it, or because the system is temporarily destroying 1870 * this instance of the activity to save space. You can distinguish 1871 * between these two scenarios with the {@link #isFinishing} method. 1872 * 1873 * <p><em>Note: do not count on this method being called as a place for 1874 * saving data! For example, if an activity is editing data in a content 1875 * provider, those edits should be committed in either {@link #onPause} or 1876 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1877 * free resources like threads that are associated with an activity, so 1878 * that a destroyed activity does not leave such things around while the 1879 * rest of its application is still running. There are situations where 1880 * the system will simply kill the activity's hosting process without 1881 * calling this method (or any others) in it, so it should not be used to 1882 * do things that are intended to remain around after the process goes 1883 * away. 1884 * 1885 * <p><em>Derived classes must call through to the super class's 1886 * implementation of this method. If they do not, an exception will be 1887 * thrown.</em></p> 1888 * 1889 * @see #onPause 1890 * @see #onStop 1891 * @see #finish 1892 * @see #isFinishing 1893 */ 1894 @CallSuper 1895 protected void onDestroy() { 1896 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onDestroy " + this); 1897 mCalled = true; 1898 1899 // dismiss any dialogs we are managing. 1900 if (mManagedDialogs != null) { 1901 final int numDialogs = mManagedDialogs.size(); 1902 for (int i = 0; i < numDialogs; i++) { 1903 final ManagedDialog md = mManagedDialogs.valueAt(i); 1904 if (md.mDialog.isShowing()) { 1905 md.mDialog.dismiss(); 1906 } 1907 } 1908 mManagedDialogs = null; 1909 } 1910 1911 // close any cursors we are managing. 1912 synchronized (mManagedCursors) { 1913 int numCursors = mManagedCursors.size(); 1914 for (int i = 0; i < numCursors; i++) { 1915 ManagedCursor c = mManagedCursors.get(i); 1916 if (c != null) { 1917 c.mCursor.close(); 1918 } 1919 } 1920 mManagedCursors.clear(); 1921 } 1922 1923 // Close any open search dialog 1924 if (mSearchManager != null) { 1925 mSearchManager.stopSearch(); 1926 } 1927 1928 if (mActionBar != null) { 1929 mActionBar.onDestroy(); 1930 } 1931 1932 getApplication().dispatchActivityDestroyed(this); 1933 } 1934 1935 /** 1936 * Report to the system that your app is now fully drawn, purely for diagnostic 1937 * purposes (calling it does not impact the visible behavior of the activity). 1938 * This is only used to help instrument application launch times, so that the 1939 * app can report when it is fully in a usable state; without this, the only thing 1940 * the system itself can determine is the point at which the activity's window 1941 * is <em>first</em> drawn and displayed. To participate in app launch time 1942 * measurement, you should always call this method after first launch (when 1943 * {@link #onCreate(android.os.Bundle)} is called), at the point where you have 1944 * entirely drawn your UI and populated with all of the significant data. You 1945 * can safely call this method any time after first launch as well, in which case 1946 * it will simply be ignored. 1947 */ 1948 public void reportFullyDrawn() { 1949 if (mDoReportFullyDrawn) { 1950 mDoReportFullyDrawn = false; 1951 try { 1952 ActivityManager.getService().reportActivityFullyDrawn(mToken); 1953 } catch (RemoteException e) { 1954 } 1955 } 1956 } 1957 1958 /** 1959 * Called by the system when the activity changes from fullscreen mode to multi-window mode and 1960 * visa-versa. 1961 * @see android.R.attr#resizeableActivity 1962 * 1963 * @param isInMultiWindowMode True if the activity is in multi-window mode. 1964 */ 1965 public void onMultiWindowModeChanged(boolean isInMultiWindowMode) { 1966 // Left deliberately empty. There should be no side effects if a direct 1967 // subclass of Activity does not call super. 1968 } 1969 1970 /** 1971 * Returns true if the activity is currently in multi-window mode. 1972 * @see android.R.attr#resizeableActivity 1973 * 1974 * @return True if the activity is in multi-window mode. 1975 */ 1976 public boolean isInMultiWindowMode() { 1977 try { 1978 return ActivityManager.getService().isInMultiWindowMode(mToken); 1979 } catch (RemoteException e) { 1980 } 1981 return false; 1982 } 1983 1984 /** 1985 * Called by the system when the activity changes to and from picture-in-picture mode. 1986 * @see android.R.attr#supportsPictureInPicture 1987 * 1988 * @param isInPictureInPictureMode True if the activity is in picture-in-picture mode. 1989 */ 1990 public void onPictureInPictureModeChanged(boolean isInPictureInPictureMode) { 1991 // Left deliberately empty. There should be no side effects if a direct 1992 // subclass of Activity does not call super. 1993 } 1994 1995 /** 1996 * Returns true if the activity is currently in picture-in-picture mode. 1997 * @see android.R.attr#supportsPictureInPicture 1998 * 1999 * @return True if the activity is in picture-in-picture mode. 2000 */ 2001 public boolean isInPictureInPictureMode() { 2002 try { 2003 return ActivityManager.getService().isInPictureInPictureMode(mToken); 2004 } catch (RemoteException e) { 2005 } 2006 return false; 2007 } 2008 2009 /** 2010 * Puts the activity in picture-in-picture mode if possible in the current system state. Any 2011 * prior calls to {@link #setPictureInPictureArgs(PictureInPictureArgs)} will still apply when 2012 * entering picture-in-picture through this call. 2013 * 2014 * @see #enterPictureInPictureMode(PictureInPictureArgs) 2015 * @see android.R.attr#supportsPictureInPicture 2016 */ 2017 public void enterPictureInPictureMode() { 2018 enterPictureInPictureMode(new PictureInPictureArgs()); 2019 } 2020 2021 /** 2022 * Puts the activity in picture-in-picture mode if possible in the current system state with 2023 * explicit given arguments. Only the set parameters in {@param args} will override prior calls 2024 * {@link #setPictureInPictureArgs(PictureInPictureArgs)}. 2025 * 2026 * The system may disallow entering picture-in-picture in various cases, including when the 2027 * activity is not visible. 2028 * 2029 * @see android.R.attr#supportsPictureInPicture 2030 * 2031 * @param args the explicit non-null arguments to use when entering picture-in-picture. 2032 * @return whether the system successfully entered picture-in-picture. 2033 */ 2034 public boolean enterPictureInPictureMode(@NonNull PictureInPictureArgs args) { 2035 try { 2036 if (args == null) { 2037 throw new IllegalArgumentException("Expected non-null picture-in-picture args"); 2038 } 2039 return ActivityManagerNative.getDefault().enterPictureInPictureMode(mToken, args); 2040 } catch (RemoteException e) { 2041 return false; 2042 } 2043 } 2044 2045 /** 2046 * Updates the properties of the picture-in-picture activity, or sets it to be used later when 2047 * {@link #enterPictureInPictureMode()} is called. 2048 * 2049 * @param args the new properties of the picture-in-picture. 2050 */ 2051 public void setPictureInPictureArgs(@NonNull PictureInPictureArgs args) { 2052 try { 2053 if (args == null) { 2054 throw new IllegalArgumentException("Expected non-null picture-in-picture args"); 2055 } 2056 ActivityManagerNative.getDefault().setPictureInPictureArgs(mToken, args); 2057 } catch (RemoteException e) { 2058 } 2059 } 2060 2061 /** 2062 * Called by the system when the device configuration changes while your 2063 * activity is running. Note that this will <em>only</em> be called if 2064 * you have selected configurations you would like to handle with the 2065 * {@link android.R.attr#configChanges} attribute in your manifest. If 2066 * any configuration change occurs that is not selected to be reported 2067 * by that attribute, then instead of reporting it the system will stop 2068 * and restart the activity (to have it launched with the new 2069 * configuration). 2070 * 2071 * <p>At the time that this function has been called, your Resources 2072 * object will have been updated to return resource values matching the 2073 * new configuration. 2074 * 2075 * @param newConfig The new device configuration. 2076 */ 2077 public void onConfigurationChanged(Configuration newConfig) { 2078 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig); 2079 mCalled = true; 2080 2081 mFragments.dispatchConfigurationChanged(newConfig); 2082 2083 if (mWindow != null) { 2084 // Pass the configuration changed event to the window 2085 mWindow.onConfigurationChanged(newConfig); 2086 } 2087 2088 if (mActionBar != null) { 2089 // Do this last; the action bar will need to access 2090 // view changes from above. 2091 mActionBar.onConfigurationChanged(newConfig); 2092 } 2093 } 2094 2095 /** 2096 * If this activity is being destroyed because it can not handle a 2097 * configuration parameter being changed (and thus its 2098 * {@link #onConfigurationChanged(Configuration)} method is 2099 * <em>not</em> being called), then you can use this method to discover 2100 * the set of changes that have occurred while in the process of being 2101 * destroyed. Note that there is no guarantee that these will be 2102 * accurate (other changes could have happened at any time), so you should 2103 * only use this as an optimization hint. 2104 * 2105 * @return Returns a bit field of the configuration parameters that are 2106 * changing, as defined by the {@link android.content.res.Configuration} 2107 * class. 2108 */ 2109 public int getChangingConfigurations() { 2110 return mConfigChangeFlags; 2111 } 2112 2113 /** 2114 * Retrieve the non-configuration instance data that was previously 2115 * returned by {@link #onRetainNonConfigurationInstance()}. This will 2116 * be available from the initial {@link #onCreate} and 2117 * {@link #onStart} calls to the new instance, allowing you to extract 2118 * any useful dynamic state from the previous instance. 2119 * 2120 * <p>Note that the data you retrieve here should <em>only</em> be used 2121 * as an optimization for handling configuration changes. You should always 2122 * be able to handle getting a null pointer back, and an activity must 2123 * still be able to restore itself to its previous state (through the 2124 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 2125 * function returns null. 2126 * 2127 * <p><strong>Note:</strong> For most cases you should use the {@link Fragment} API 2128 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 2129 * available on older platforms through the Android support libraries. 2130 * 2131 * @return the object previously returned by {@link #onRetainNonConfigurationInstance()} 2132 */ 2133 @Nullable 2134 public Object getLastNonConfigurationInstance() { 2135 return mLastNonConfigurationInstances != null 2136 ? mLastNonConfigurationInstances.activity : null; 2137 } 2138 2139 /** 2140 * Called by the system, as part of destroying an 2141 * activity due to a configuration change, when it is known that a new 2142 * instance will immediately be created for the new configuration. You 2143 * can return any object you like here, including the activity instance 2144 * itself, which can later be retrieved by calling 2145 * {@link #getLastNonConfigurationInstance()} in the new activity 2146 * instance. 2147 * 2148 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2149 * or later, consider instead using a {@link Fragment} with 2150 * {@link Fragment#setRetainInstance(boolean) 2151 * Fragment.setRetainInstance(boolean}.</em> 2152 * 2153 * <p>This function is called purely as an optimization, and you must 2154 * not rely on it being called. When it is called, a number of guarantees 2155 * will be made to help optimize configuration switching: 2156 * <ul> 2157 * <li> The function will be called between {@link #onStop} and 2158 * {@link #onDestroy}. 2159 * <li> A new instance of the activity will <em>always</em> be immediately 2160 * created after this one's {@link #onDestroy()} is called. In particular, 2161 * <em>no</em> messages will be dispatched during this time (when the returned 2162 * object does not have an activity to be associated with). 2163 * <li> The object you return here will <em>always</em> be available from 2164 * the {@link #getLastNonConfigurationInstance()} method of the following 2165 * activity instance as described there. 2166 * </ul> 2167 * 2168 * <p>These guarantees are designed so that an activity can use this API 2169 * to propagate extensive state from the old to new activity instance, from 2170 * loaded bitmaps, to network connections, to evenly actively running 2171 * threads. Note that you should <em>not</em> propagate any data that 2172 * may change based on the configuration, including any data loaded from 2173 * resources such as strings, layouts, or drawables. 2174 * 2175 * <p>The guarantee of no message handling during the switch to the next 2176 * activity simplifies use with active objects. For example if your retained 2177 * state is an {@link android.os.AsyncTask} you are guaranteed that its 2178 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 2179 * not be called from the call here until you execute the next instance's 2180 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 2181 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 2182 * running in a separate thread.) 2183 * 2184 * <p><strong>Note:</strong> For most cases you should use the {@link Fragment} API 2185 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 2186 * available on older platforms through the Android support libraries. 2187 * 2188 * @return any Object holding the desired state to propagate to the 2189 * next activity instance 2190 */ 2191 public Object onRetainNonConfigurationInstance() { 2192 return null; 2193 } 2194 2195 /** 2196 * Retrieve the non-configuration instance data that was previously 2197 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 2198 * be available from the initial {@link #onCreate} and 2199 * {@link #onStart} calls to the new instance, allowing you to extract 2200 * any useful dynamic state from the previous instance. 2201 * 2202 * <p>Note that the data you retrieve here should <em>only</em> be used 2203 * as an optimization for handling configuration changes. You should always 2204 * be able to handle getting a null pointer back, and an activity must 2205 * still be able to restore itself to its previous state (through the 2206 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 2207 * function returns null. 2208 * 2209 * @return Returns the object previously returned by 2210 * {@link #onRetainNonConfigurationChildInstances()} 2211 */ 2212 @Nullable 2213 HashMap<String, Object> getLastNonConfigurationChildInstances() { 2214 return mLastNonConfigurationInstances != null 2215 ? mLastNonConfigurationInstances.children : null; 2216 } 2217 2218 /** 2219 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 2220 * it should return either a mapping from child activity id strings to arbitrary objects, 2221 * or null. This method is intended to be used by Activity framework subclasses that control a 2222 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 2223 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 2224 */ 2225 @Nullable 2226 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 2227 return null; 2228 } 2229 2230 NonConfigurationInstances retainNonConfigurationInstances() { 2231 Object activity = onRetainNonConfigurationInstance(); 2232 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 2233 FragmentManagerNonConfig fragments = mFragments.retainNestedNonConfig(); 2234 2235 // We're already stopped but we've been asked to retain. 2236 // Our fragments are taken care of but we need to mark the loaders for retention. 2237 // In order to do this correctly we need to restart the loaders first before 2238 // handing them off to the next activity. 2239 mFragments.doLoaderStart(); 2240 mFragments.doLoaderStop(true); 2241 ArrayMap<String, LoaderManager> loaders = mFragments.retainLoaderNonConfig(); 2242 2243 if (activity == null && children == null && fragments == null && loaders == null 2244 && mVoiceInteractor == null) { 2245 return null; 2246 } 2247 2248 NonConfigurationInstances nci = new NonConfigurationInstances(); 2249 nci.activity = activity; 2250 nci.children = children; 2251 nci.fragments = fragments; 2252 nci.loaders = loaders; 2253 if (mVoiceInteractor != null) { 2254 mVoiceInteractor.retainInstance(); 2255 nci.voiceInteractor = mVoiceInteractor; 2256 } 2257 return nci; 2258 } 2259 2260 public void onLowMemory() { 2261 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onLowMemory " + this); 2262 mCalled = true; 2263 mFragments.dispatchLowMemory(); 2264 } 2265 2266 public void onTrimMemory(int level) { 2267 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onTrimMemory " + this + ": " + level); 2268 mCalled = true; 2269 mFragments.dispatchTrimMemory(level); 2270 } 2271 2272 /** 2273 * Return the FragmentManager for interacting with fragments associated 2274 * with this activity. 2275 */ 2276 public FragmentManager getFragmentManager() { 2277 return mFragments.getFragmentManager(); 2278 } 2279 2280 /** 2281 * Called when a Fragment is being attached to this activity, immediately 2282 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 2283 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 2284 */ 2285 public void onAttachFragment(Fragment fragment) { 2286 } 2287 2288 /** 2289 * Wrapper around 2290 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 2291 * that gives the resulting {@link Cursor} to call 2292 * {@link #startManagingCursor} so that the activity will manage its 2293 * lifecycle for you. 2294 * 2295 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2296 * or later, consider instead using {@link LoaderManager} instead, available 2297 * via {@link #getLoaderManager()}.</em> 2298 * 2299 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 2300 * this method, because the activity will do that for you at the appropriate time. However, if 2301 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 2302 * not</em> automatically close the cursor and, in that case, you must call 2303 * {@link Cursor#close()}.</p> 2304 * 2305 * @param uri The URI of the content provider to query. 2306 * @param projection List of columns to return. 2307 * @param selection SQL WHERE clause. 2308 * @param sortOrder SQL ORDER BY clause. 2309 * 2310 * @return The Cursor that was returned by query(). 2311 * 2312 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 2313 * @see #startManagingCursor 2314 * @hide 2315 * 2316 * @deprecated Use {@link CursorLoader} instead. 2317 */ 2318 @Deprecated 2319 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 2320 String sortOrder) { 2321 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 2322 if (c != null) { 2323 startManagingCursor(c); 2324 } 2325 return c; 2326 } 2327 2328 /** 2329 * Wrapper around 2330 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 2331 * that gives the resulting {@link Cursor} to call 2332 * {@link #startManagingCursor} so that the activity will manage its 2333 * lifecycle for you. 2334 * 2335 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2336 * or later, consider instead using {@link LoaderManager} instead, available 2337 * via {@link #getLoaderManager()}.</em> 2338 * 2339 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 2340 * this method, because the activity will do that for you at the appropriate time. However, if 2341 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 2342 * not</em> automatically close the cursor and, in that case, you must call 2343 * {@link Cursor#close()}.</p> 2344 * 2345 * @param uri The URI of the content provider to query. 2346 * @param projection List of columns to return. 2347 * @param selection SQL WHERE clause. 2348 * @param selectionArgs The arguments to selection, if any ?s are pesent 2349 * @param sortOrder SQL ORDER BY clause. 2350 * 2351 * @return The Cursor that was returned by query(). 2352 * 2353 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 2354 * @see #startManagingCursor 2355 * 2356 * @deprecated Use {@link CursorLoader} instead. 2357 */ 2358 @Deprecated 2359 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 2360 String[] selectionArgs, String sortOrder) { 2361 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 2362 if (c != null) { 2363 startManagingCursor(c); 2364 } 2365 return c; 2366 } 2367 2368 /** 2369 * This method allows the activity to take care of managing the given 2370 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 2371 * That is, when the activity is stopped it will automatically call 2372 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 2373 * it will call {@link Cursor#requery} for you. When the activity is 2374 * destroyed, all managed Cursors will be closed automatically. 2375 * 2376 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2377 * or later, consider instead using {@link LoaderManager} instead, available 2378 * via {@link #getLoaderManager()}.</em> 2379 * 2380 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 2381 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 2382 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 2383 * <em>will not</em> automatically close the cursor and, in that case, you must call 2384 * {@link Cursor#close()}.</p> 2385 * 2386 * @param c The Cursor to be managed. 2387 * 2388 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 2389 * @see #stopManagingCursor 2390 * 2391 * @deprecated Use the new {@link android.content.CursorLoader} class with 2392 * {@link LoaderManager} instead; this is also 2393 * available on older platforms through the Android compatibility package. 2394 */ 2395 @Deprecated 2396 public void startManagingCursor(Cursor c) { 2397 synchronized (mManagedCursors) { 2398 mManagedCursors.add(new ManagedCursor(c)); 2399 } 2400 } 2401 2402 /** 2403 * Given a Cursor that was previously given to 2404 * {@link #startManagingCursor}, stop the activity's management of that 2405 * cursor. 2406 * 2407 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 2408 * the system <em>will not</em> automatically close the cursor and you must call 2409 * {@link Cursor#close()}.</p> 2410 * 2411 * @param c The Cursor that was being managed. 2412 * 2413 * @see #startManagingCursor 2414 * 2415 * @deprecated Use the new {@link android.content.CursorLoader} class with 2416 * {@link LoaderManager} instead; this is also 2417 * available on older platforms through the Android compatibility package. 2418 */ 2419 @Deprecated 2420 public void stopManagingCursor(Cursor c) { 2421 synchronized (mManagedCursors) { 2422 final int N = mManagedCursors.size(); 2423 for (int i=0; i<N; i++) { 2424 ManagedCursor mc = mManagedCursors.get(i); 2425 if (mc.mCursor == c) { 2426 mManagedCursors.remove(i); 2427 break; 2428 } 2429 } 2430 } 2431 } 2432 2433 /** 2434 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 2435 * this is a no-op. 2436 * @hide 2437 */ 2438 @Deprecated 2439 public void setPersistent(boolean isPersistent) { 2440 } 2441 2442 /** 2443 * Finds a view that was identified by the id attribute from the XML that 2444 * was processed in {@link #onCreate}. 2445 * 2446 * @return The view if found or null otherwise. 2447 */ 2448 @Nullable 2449 public View findViewById(@IdRes int id) { 2450 return getWindow().findViewById(id); 2451 } 2452 2453 /** 2454 * Retrieve a reference to this activity's ActionBar. 2455 * 2456 * @return The Activity's ActionBar, or null if it does not have one. 2457 */ 2458 @Nullable 2459 public ActionBar getActionBar() { 2460 initWindowDecorActionBar(); 2461 return mActionBar; 2462 } 2463 2464 /** 2465 * Set a {@link android.widget.Toolbar Toolbar} to act as the {@link ActionBar} for this 2466 * Activity window. 2467 * 2468 * <p>When set to a non-null value the {@link #getActionBar()} method will return 2469 * an {@link ActionBar} object that can be used to control the given toolbar as if it were 2470 * a traditional window decor action bar. The toolbar's menu will be populated with the 2471 * Activity's options menu and the navigation button will be wired through the standard 2472 * {@link android.R.id#home home} menu select action.</p> 2473 * 2474 * <p>In order to use a Toolbar within the Activity's window content the application 2475 * must not request the window feature {@link Window#FEATURE_ACTION_BAR FEATURE_ACTION_BAR}.</p> 2476 * 2477 * @param toolbar Toolbar to set as the Activity's action bar, or {@code null} to clear it 2478 */ 2479 public void setActionBar(@Nullable Toolbar toolbar) { 2480 final ActionBar ab = getActionBar(); 2481 if (ab instanceof WindowDecorActionBar) { 2482 throw new IllegalStateException("This Activity already has an action bar supplied " + 2483 "by the window decor. Do not request Window.FEATURE_ACTION_BAR and set " + 2484 "android:windowActionBar to false in your theme to use a Toolbar instead."); 2485 } 2486 2487 // If we reach here then we're setting a new action bar 2488 // First clear out the MenuInflater to make sure that it is valid for the new Action Bar 2489 mMenuInflater = null; 2490 2491 // If we have an action bar currently, destroy it 2492 if (ab != null) { 2493 ab.onDestroy(); 2494 } 2495 2496 if (toolbar != null) { 2497 final ToolbarActionBar tbab = new ToolbarActionBar(toolbar, getTitle(), this); 2498 mActionBar = tbab; 2499 mWindow.setCallback(tbab.getWrappedWindowCallback()); 2500 } else { 2501 mActionBar = null; 2502 // Re-set the original window callback since we may have already set a Toolbar wrapper 2503 mWindow.setCallback(this); 2504 } 2505 2506 invalidateOptionsMenu(); 2507 } 2508 2509 /** 2510 * Creates a new ActionBar, locates the inflated ActionBarView, 2511 * initializes the ActionBar with the view, and sets mActionBar. 2512 */ 2513 private void initWindowDecorActionBar() { 2514 Window window = getWindow(); 2515 2516 // Initializing the window decor can change window feature flags. 2517 // Make sure that we have the correct set before performing the test below. 2518 window.getDecorView(); 2519 2520 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 2521 return; 2522 } 2523 2524 mActionBar = new WindowDecorActionBar(this); 2525 mActionBar.setDefaultDisplayHomeAsUpEnabled(mEnableDefaultActionBarUp); 2526 2527 mWindow.setDefaultIcon(mActivityInfo.getIconResource()); 2528 mWindow.setDefaultLogo(mActivityInfo.getLogoResource()); 2529 } 2530 2531 /** 2532 * Set the activity content from a layout resource. The resource will be 2533 * inflated, adding all top-level views to the activity. 2534 * 2535 * @param layoutResID Resource ID to be inflated. 2536 * 2537 * @see #setContentView(android.view.View) 2538 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2539 */ 2540 public void setContentView(@LayoutRes int layoutResID) { 2541 getWindow().setContentView(layoutResID); 2542 initWindowDecorActionBar(); 2543 } 2544 2545 /** 2546 * Set the activity content to an explicit view. This view is placed 2547 * directly into the activity's view hierarchy. It can itself be a complex 2548 * view hierarchy. When calling this method, the layout parameters of the 2549 * specified view are ignored. Both the width and the height of the view are 2550 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 2551 * your own layout parameters, invoke 2552 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 2553 * instead. 2554 * 2555 * @param view The desired content to display. 2556 * 2557 * @see #setContentView(int) 2558 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2559 */ 2560 public void setContentView(View view) { 2561 getWindow().setContentView(view); 2562 initWindowDecorActionBar(); 2563 } 2564 2565 /** 2566 * Set the activity content to an explicit view. This view is placed 2567 * directly into the activity's view hierarchy. It can itself be a complex 2568 * view hierarchy. 2569 * 2570 * @param view The desired content to display. 2571 * @param params Layout parameters for the view. 2572 * 2573 * @see #setContentView(android.view.View) 2574 * @see #setContentView(int) 2575 */ 2576 public void setContentView(View view, ViewGroup.LayoutParams params) { 2577 getWindow().setContentView(view, params); 2578 initWindowDecorActionBar(); 2579 } 2580 2581 /** 2582 * Add an additional content view to the activity. Added after any existing 2583 * ones in the activity -- existing views are NOT removed. 2584 * 2585 * @param view The desired content to display. 2586 * @param params Layout parameters for the view. 2587 */ 2588 public void addContentView(View view, ViewGroup.LayoutParams params) { 2589 getWindow().addContentView(view, params); 2590 initWindowDecorActionBar(); 2591 } 2592 2593 /** 2594 * Retrieve the {@link TransitionManager} responsible for default transitions in this window. 2595 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2596 * 2597 * <p>This method will return non-null after content has been initialized (e.g. by using 2598 * {@link #setContentView}) if {@link Window#FEATURE_CONTENT_TRANSITIONS} has been granted.</p> 2599 * 2600 * @return This window's content TransitionManager or null if none is set. 2601 */ 2602 public TransitionManager getContentTransitionManager() { 2603 return getWindow().getTransitionManager(); 2604 } 2605 2606 /** 2607 * Set the {@link TransitionManager} to use for default transitions in this window. 2608 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2609 * 2610 * @param tm The TransitionManager to use for scene changes. 2611 */ 2612 public void setContentTransitionManager(TransitionManager tm) { 2613 getWindow().setTransitionManager(tm); 2614 } 2615 2616 /** 2617 * Retrieve the {@link Scene} representing this window's current content. 2618 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2619 * 2620 * <p>This method will return null if the current content is not represented by a Scene.</p> 2621 * 2622 * @return Current Scene being shown or null 2623 */ 2624 public Scene getContentScene() { 2625 return getWindow().getContentScene(); 2626 } 2627 2628 /** 2629 * Sets whether this activity is finished when touched outside its window's 2630 * bounds. 2631 */ 2632 public void setFinishOnTouchOutside(boolean finish) { 2633 mWindow.setCloseOnTouchOutside(finish); 2634 } 2635 2636 /** @hide */ 2637 @IntDef({ 2638 DEFAULT_KEYS_DISABLE, 2639 DEFAULT_KEYS_DIALER, 2640 DEFAULT_KEYS_SHORTCUT, 2641 DEFAULT_KEYS_SEARCH_LOCAL, 2642 DEFAULT_KEYS_SEARCH_GLOBAL}) 2643 @Retention(RetentionPolicy.SOURCE) 2644 @interface DefaultKeyMode {} 2645 2646 /** 2647 * Use with {@link #setDefaultKeyMode} to turn off default handling of 2648 * keys. 2649 * 2650 * @see #setDefaultKeyMode 2651 */ 2652 static public final int DEFAULT_KEYS_DISABLE = 0; 2653 /** 2654 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 2655 * key handling. 2656 * 2657 * @see #setDefaultKeyMode 2658 */ 2659 static public final int DEFAULT_KEYS_DIALER = 1; 2660 /** 2661 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 2662 * default key handling. 2663 * 2664 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 2665 * 2666 * @see #setDefaultKeyMode 2667 */ 2668 static public final int DEFAULT_KEYS_SHORTCUT = 2; 2669 /** 2670 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2671 * will start an application-defined search. (If the application or activity does not 2672 * actually define a search, the the keys will be ignored.) 2673 * 2674 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2675 * 2676 * @see #setDefaultKeyMode 2677 */ 2678 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 2679 2680 /** 2681 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2682 * will start a global search (typically web search, but some platforms may define alternate 2683 * methods for global search) 2684 * 2685 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2686 * 2687 * @see #setDefaultKeyMode 2688 */ 2689 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 2690 2691 /** 2692 * Select the default key handling for this activity. This controls what 2693 * will happen to key events that are not otherwise handled. The default 2694 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 2695 * floor. Other modes allow you to launch the dialer 2696 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 2697 * menu without requiring the menu key be held down 2698 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 2699 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 2700 * 2701 * <p>Note that the mode selected here does not impact the default 2702 * handling of system keys, such as the "back" and "menu" keys, and your 2703 * activity and its views always get a first chance to receive and handle 2704 * all application keys. 2705 * 2706 * @param mode The desired default key mode constant. 2707 * 2708 * @see #DEFAULT_KEYS_DISABLE 2709 * @see #DEFAULT_KEYS_DIALER 2710 * @see #DEFAULT_KEYS_SHORTCUT 2711 * @see #DEFAULT_KEYS_SEARCH_LOCAL 2712 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 2713 * @see #onKeyDown 2714 */ 2715 public final void setDefaultKeyMode(@DefaultKeyMode int mode) { 2716 mDefaultKeyMode = mode; 2717 2718 // Some modes use a SpannableStringBuilder to track & dispatch input events 2719 // This list must remain in sync with the switch in onKeyDown() 2720 switch (mode) { 2721 case DEFAULT_KEYS_DISABLE: 2722 case DEFAULT_KEYS_SHORTCUT: 2723 mDefaultKeySsb = null; // not used in these modes 2724 break; 2725 case DEFAULT_KEYS_DIALER: 2726 case DEFAULT_KEYS_SEARCH_LOCAL: 2727 case DEFAULT_KEYS_SEARCH_GLOBAL: 2728 mDefaultKeySsb = new SpannableStringBuilder(); 2729 Selection.setSelection(mDefaultKeySsb,0); 2730 break; 2731 default: 2732 throw new IllegalArgumentException(); 2733 } 2734 } 2735 2736 /** 2737 * Called when a key was pressed down and not handled by any of the views 2738 * inside of the activity. So, for example, key presses while the cursor 2739 * is inside a TextView will not trigger the event (unless it is a navigation 2740 * to another object) because TextView handles its own key presses. 2741 * 2742 * <p>If the focused view didn't want this event, this method is called. 2743 * 2744 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2745 * by calling {@link #onBackPressed()}, though the behavior varies based 2746 * on the application compatibility mode: for 2747 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2748 * it will set up the dispatch to call {@link #onKeyUp} where the action 2749 * will be performed; for earlier applications, it will perform the 2750 * action immediately in on-down, as those versions of the platform 2751 * behaved. 2752 * 2753 * <p>Other additional default key handling may be performed 2754 * if configured with {@link #setDefaultKeyMode}. 2755 * 2756 * @return Return <code>true</code> to prevent this event from being propagated 2757 * further, or <code>false</code> to indicate that you have not handled 2758 * this event and it should continue to be propagated. 2759 * @see #onKeyUp 2760 * @see android.view.KeyEvent 2761 */ 2762 public boolean onKeyDown(int keyCode, KeyEvent event) { 2763 if (keyCode == KeyEvent.KEYCODE_BACK) { 2764 if (getApplicationInfo().targetSdkVersion 2765 >= Build.VERSION_CODES.ECLAIR) { 2766 event.startTracking(); 2767 } else { 2768 onBackPressed(); 2769 } 2770 return true; 2771 } 2772 2773 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2774 return false; 2775 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2776 Window w = getWindow(); 2777 if (w.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 2778 w.performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, keyCode, event, 2779 Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2780 return true; 2781 } 2782 return false; 2783 } else { 2784 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2785 boolean clearSpannable = false; 2786 boolean handled; 2787 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2788 clearSpannable = true; 2789 handled = false; 2790 } else { 2791 handled = TextKeyListener.getInstance().onKeyDown( 2792 null, mDefaultKeySsb, keyCode, event); 2793 if (handled && mDefaultKeySsb.length() > 0) { 2794 // something useable has been typed - dispatch it now. 2795 2796 final String str = mDefaultKeySsb.toString(); 2797 clearSpannable = true; 2798 2799 switch (mDefaultKeyMode) { 2800 case DEFAULT_KEYS_DIALER: 2801 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2802 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2803 startActivity(intent); 2804 break; 2805 case DEFAULT_KEYS_SEARCH_LOCAL: 2806 startSearch(str, false, null, false); 2807 break; 2808 case DEFAULT_KEYS_SEARCH_GLOBAL: 2809 startSearch(str, false, null, true); 2810 break; 2811 } 2812 } 2813 } 2814 if (clearSpannable) { 2815 mDefaultKeySsb.clear(); 2816 mDefaultKeySsb.clearSpans(); 2817 Selection.setSelection(mDefaultKeySsb,0); 2818 } 2819 return handled; 2820 } 2821 } 2822 2823 /** 2824 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2825 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2826 * the event). 2827 */ 2828 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2829 return false; 2830 } 2831 2832 /** 2833 * Called when a key was released and not handled by any of the views 2834 * inside of the activity. So, for example, key presses while the cursor 2835 * is inside a TextView will not trigger the event (unless it is a navigation 2836 * to another object) because TextView handles its own key presses. 2837 * 2838 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2839 * and go back. 2840 * 2841 * @return Return <code>true</code> to prevent this event from being propagated 2842 * further, or <code>false</code> to indicate that you have not handled 2843 * this event and it should continue to be propagated. 2844 * @see #onKeyDown 2845 * @see KeyEvent 2846 */ 2847 public boolean onKeyUp(int keyCode, KeyEvent event) { 2848 if (getApplicationInfo().targetSdkVersion 2849 >= Build.VERSION_CODES.ECLAIR) { 2850 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2851 && !event.isCanceled()) { 2852 onBackPressed(); 2853 return true; 2854 } 2855 } 2856 return false; 2857 } 2858 2859 /** 2860 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2861 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2862 * the event). 2863 */ 2864 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2865 return false; 2866 } 2867 2868 /** 2869 * Called when the activity has detected the user's press of the back 2870 * key. The default implementation simply finishes the current activity, 2871 * but you can override this to do whatever you want. 2872 */ 2873 public void onBackPressed() { 2874 if (mActionBar != null && mActionBar.collapseActionView()) { 2875 return; 2876 } 2877 2878 if (!mFragments.getFragmentManager().popBackStackImmediate()) { 2879 finishAfterTransition(); 2880 } 2881 } 2882 2883 /** 2884 * Called when a key shortcut event is not handled by any of the views in the Activity. 2885 * Override this method to implement global key shortcuts for the Activity. 2886 * Key shortcuts can also be implemented by setting the 2887 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2888 * 2889 * @param keyCode The value in event.getKeyCode(). 2890 * @param event Description of the key event. 2891 * @return True if the key shortcut was handled. 2892 */ 2893 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2894 // Let the Action Bar have a chance at handling the shortcut. 2895 ActionBar actionBar = getActionBar(); 2896 return (actionBar != null && actionBar.onKeyShortcut(keyCode, event)); 2897 } 2898 2899 /** 2900 * Called when a touch screen event was not handled by any of the views 2901 * under it. This is most useful to process touch events that happen 2902 * outside of your window bounds, where there is no view to receive it. 2903 * 2904 * @param event The touch screen event being processed. 2905 * 2906 * @return Return true if you have consumed the event, false if you haven't. 2907 * The default implementation always returns false. 2908 */ 2909 public boolean onTouchEvent(MotionEvent event) { 2910 if (mWindow.shouldCloseOnTouch(this, event)) { 2911 finish(); 2912 return true; 2913 } 2914 2915 return false; 2916 } 2917 2918 /** 2919 * Called when the trackball was moved and not handled by any of the 2920 * views inside of the activity. So, for example, if the trackball moves 2921 * while focus is on a button, you will receive a call here because 2922 * buttons do not normally do anything with trackball events. The call 2923 * here happens <em>before</em> trackball movements are converted to 2924 * DPAD key events, which then get sent back to the view hierarchy, and 2925 * will be processed at the point for things like focus navigation. 2926 * 2927 * @param event The trackball event being processed. 2928 * 2929 * @return Return true if you have consumed the event, false if you haven't. 2930 * The default implementation always returns false. 2931 */ 2932 public boolean onTrackballEvent(MotionEvent event) { 2933 return false; 2934 } 2935 2936 /** 2937 * Called when a generic motion event was not handled by any of the 2938 * views inside of the activity. 2939 * <p> 2940 * Generic motion events describe joystick movements, mouse hovers, track pad 2941 * touches, scroll wheel movements and other input events. The 2942 * {@link MotionEvent#getSource() source} of the motion event specifies 2943 * the class of input that was received. Implementations of this method 2944 * must examine the bits in the source before processing the event. 2945 * The following code example shows how this is done. 2946 * </p><p> 2947 * Generic motion events with source class 2948 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2949 * are delivered to the view under the pointer. All other generic motion events are 2950 * delivered to the focused view. 2951 * </p><p> 2952 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2953 * handle this event. 2954 * </p> 2955 * 2956 * @param event The generic motion event being processed. 2957 * 2958 * @return Return true if you have consumed the event, false if you haven't. 2959 * The default implementation always returns false. 2960 */ 2961 public boolean onGenericMotionEvent(MotionEvent event) { 2962 return false; 2963 } 2964 2965 /** 2966 * Called whenever a key, touch, or trackball event is dispatched to the 2967 * activity. Implement this method if you wish to know that the user has 2968 * interacted with the device in some way while your activity is running. 2969 * This callback and {@link #onUserLeaveHint} are intended to help 2970 * activities manage status bar notifications intelligently; specifically, 2971 * for helping activities determine the proper time to cancel a notfication. 2972 * 2973 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2974 * be accompanied by calls to {@link #onUserInteraction}. This 2975 * ensures that your activity will be told of relevant user activity such 2976 * as pulling down the notification pane and touching an item there. 2977 * 2978 * <p>Note that this callback will be invoked for the touch down action 2979 * that begins a touch gesture, but may not be invoked for the touch-moved 2980 * and touch-up actions that follow. 2981 * 2982 * @see #onUserLeaveHint() 2983 */ 2984 public void onUserInteraction() { 2985 } 2986 2987 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2988 // Update window manager if: we have a view, that view is 2989 // attached to its parent (which will be a RootView), and 2990 // this activity is not embedded. 2991 if (mParent == null) { 2992 View decor = mDecor; 2993 if (decor != null && decor.getParent() != null) { 2994 getWindowManager().updateViewLayout(decor, params); 2995 } 2996 } 2997 } 2998 2999 public void onContentChanged() { 3000 } 3001 3002 /** 3003 * Called when the current {@link Window} of the activity gains or loses 3004 * focus. This is the best indicator of whether this activity is visible 3005 * to the user. The default implementation clears the key tracking 3006 * state, so should always be called. 3007 * 3008 * <p>Note that this provides information about global focus state, which 3009 * is managed independently of activity lifecycles. As such, while focus 3010 * changes will generally have some relation to lifecycle changes (an 3011 * activity that is stopped will not generally get window focus), you 3012 * should not rely on any particular order between the callbacks here and 3013 * those in the other lifecycle methods such as {@link #onResume}. 3014 * 3015 * <p>As a general rule, however, a resumed activity will have window 3016 * focus... unless it has displayed other dialogs or popups that take 3017 * input focus, in which case the activity itself will not have focus 3018 * when the other windows have it. Likewise, the system may display 3019 * system-level windows (such as the status bar notification panel or 3020 * a system alert) which will temporarily take window input focus without 3021 * pausing the foreground activity. 3022 * 3023 * @param hasFocus Whether the window of this activity has focus. 3024 * 3025 * @see #hasWindowFocus() 3026 * @see #onResume 3027 * @see View#onWindowFocusChanged(boolean) 3028 */ 3029 public void onWindowFocusChanged(boolean hasFocus) { 3030 } 3031 3032 /** 3033 * Called when the main window associated with the activity has been 3034 * attached to the window manager. 3035 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 3036 * for more information. 3037 * @see View#onAttachedToWindow 3038 */ 3039 public void onAttachedToWindow() { 3040 } 3041 3042 /** 3043 * Called when the main window associated with the activity has been 3044 * detached from the window manager. 3045 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 3046 * for more information. 3047 * @see View#onDetachedFromWindow 3048 */ 3049 public void onDetachedFromWindow() { 3050 } 3051 3052 /** 3053 * Returns true if this activity's <em>main</em> window currently has window focus. 3054 * Note that this is not the same as the view itself having focus. 3055 * 3056 * @return True if this activity's main window currently has window focus. 3057 * 3058 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 3059 */ 3060 public boolean hasWindowFocus() { 3061 Window w = getWindow(); 3062 if (w != null) { 3063 View d = w.getDecorView(); 3064 if (d != null) { 3065 return d.hasWindowFocus(); 3066 } 3067 } 3068 return false; 3069 } 3070 3071 /** 3072 * Called when the main window associated with the activity has been dismissed. 3073 * @hide 3074 */ 3075 @Override 3076 public void onWindowDismissed(boolean finishTask, boolean suppressWindowTransition) { 3077 finish(finishTask ? FINISH_TASK_WITH_ACTIVITY : DONT_FINISH_TASK_WITH_ACTIVITY); 3078 if (suppressWindowTransition) { 3079 overridePendingTransition(0, 0); 3080 } 3081 } 3082 3083 3084 /** 3085 * Moves the activity from 3086 * {@link android.app.ActivityManager.StackId#FREEFORM_WORKSPACE_STACK_ID} to 3087 * {@link android.app.ActivityManager.StackId#FULLSCREEN_WORKSPACE_STACK_ID} stack. 3088 * 3089 * @hide 3090 */ 3091 @Override 3092 public void exitFreeformMode() throws RemoteException { 3093 ActivityManager.getService().exitFreeformMode(mToken); 3094 } 3095 3096 /** Returns the current stack Id for the window. 3097 * @hide 3098 */ 3099 @Override 3100 public int getWindowStackId() throws RemoteException { 3101 return ActivityManager.getService().getActivityStackId(mToken); 3102 } 3103 3104 /** 3105 * Puts the activity in picture-in-picture mode if the activity supports. 3106 * @see android.R.attr#supportsPictureInPicture 3107 * @hide 3108 */ 3109 @Override 3110 public void enterPictureInPictureModeIfPossible() { 3111 if (mActivityInfo.supportsPictureInPicture()) { 3112 enterPictureInPictureMode(); 3113 } 3114 } 3115 3116 /** 3117 * Called to process key events. You can override this to intercept all 3118 * key events before they are dispatched to the window. Be sure to call 3119 * this implementation for key events that should be handled normally. 3120 * 3121 * @param event The key event. 3122 * 3123 * @return boolean Return true if this event was consumed. 3124 */ 3125 public boolean dispatchKeyEvent(KeyEvent event) { 3126 onUserInteraction(); 3127 3128 // Let action bars open menus in response to the menu key prioritized over 3129 // the window handling it 3130 final int keyCode = event.getKeyCode(); 3131 if (keyCode == KeyEvent.KEYCODE_MENU && 3132 mActionBar != null && mActionBar.onMenuKeyEvent(event)) { 3133 return true; 3134 } 3135 3136 Window win = getWindow(); 3137 if (win.superDispatchKeyEvent(event)) { 3138 return true; 3139 } 3140 View decor = mDecor; 3141 if (decor == null) decor = win.getDecorView(); 3142 return event.dispatch(this, decor != null 3143 ? decor.getKeyDispatcherState() : null, this); 3144 } 3145 3146 /** 3147 * Called to process a key shortcut event. 3148 * You can override this to intercept all key shortcut events before they are 3149 * dispatched to the window. Be sure to call this implementation for key shortcut 3150 * events that should be handled normally. 3151 * 3152 * @param event The key shortcut event. 3153 * @return True if this event was consumed. 3154 */ 3155 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 3156 onUserInteraction(); 3157 if (getWindow().superDispatchKeyShortcutEvent(event)) { 3158 return true; 3159 } 3160 return onKeyShortcut(event.getKeyCode(), event); 3161 } 3162 3163 /** 3164 * Called to process touch screen events. You can override this to 3165 * intercept all touch screen events before they are dispatched to the 3166 * window. Be sure to call this implementation for touch screen events 3167 * that should be handled normally. 3168 * 3169 * @param ev The touch screen event. 3170 * 3171 * @return boolean Return true if this event was consumed. 3172 */ 3173 public boolean dispatchTouchEvent(MotionEvent ev) { 3174 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 3175 onUserInteraction(); 3176 } 3177 if (getWindow().superDispatchTouchEvent(ev)) { 3178 return true; 3179 } 3180 return onTouchEvent(ev); 3181 } 3182 3183 /** 3184 * Called to process trackball events. You can override this to 3185 * intercept all trackball events before they are dispatched to the 3186 * window. Be sure to call this implementation for trackball events 3187 * that should be handled normally. 3188 * 3189 * @param ev The trackball event. 3190 * 3191 * @return boolean Return true if this event was consumed. 3192 */ 3193 public boolean dispatchTrackballEvent(MotionEvent ev) { 3194 onUserInteraction(); 3195 if (getWindow().superDispatchTrackballEvent(ev)) { 3196 return true; 3197 } 3198 return onTrackballEvent(ev); 3199 } 3200 3201 /** 3202 * Called to process generic motion events. You can override this to 3203 * intercept all generic motion events before they are dispatched to the 3204 * window. Be sure to call this implementation for generic motion events 3205 * that should be handled normally. 3206 * 3207 * @param ev The generic motion event. 3208 * 3209 * @return boolean Return true if this event was consumed. 3210 */ 3211 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 3212 onUserInteraction(); 3213 if (getWindow().superDispatchGenericMotionEvent(ev)) { 3214 return true; 3215 } 3216 return onGenericMotionEvent(ev); 3217 } 3218 3219 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 3220 event.setClassName(getClass().getName()); 3221 event.setPackageName(getPackageName()); 3222 3223 LayoutParams params = getWindow().getAttributes(); 3224 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 3225 (params.height == LayoutParams.MATCH_PARENT); 3226 event.setFullScreen(isFullScreen); 3227 3228 CharSequence title = getTitle(); 3229 if (!TextUtils.isEmpty(title)) { 3230 event.getText().add(title); 3231 } 3232 3233 return true; 3234 } 3235 3236 /** 3237 * Default implementation of 3238 * {@link android.view.Window.Callback#onCreatePanelView} 3239 * for activities. This 3240 * simply returns null so that all panel sub-windows will have the default 3241 * menu behavior. 3242 */ 3243 @Nullable 3244 public View onCreatePanelView(int featureId) { 3245 return null; 3246 } 3247 3248 /** 3249 * Default implementation of 3250 * {@link android.view.Window.Callback#onCreatePanelMenu} 3251 * for activities. This calls through to the new 3252 * {@link #onCreateOptionsMenu} method for the 3253 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 3254 * so that subclasses of Activity don't need to deal with feature codes. 3255 */ 3256 public boolean onCreatePanelMenu(int featureId, Menu menu) { 3257 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 3258 boolean show = onCreateOptionsMenu(menu); 3259 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 3260 return show; 3261 } 3262 return false; 3263 } 3264 3265 /** 3266 * Default implementation of 3267 * {@link android.view.Window.Callback#onPreparePanel} 3268 * for activities. This 3269 * calls through to the new {@link #onPrepareOptionsMenu} method for the 3270 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 3271 * panel, so that subclasses of 3272 * Activity don't need to deal with feature codes. 3273 */ 3274 public boolean onPreparePanel(int featureId, View view, Menu menu) { 3275 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 3276 boolean goforit = onPrepareOptionsMenu(menu); 3277 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 3278 return goforit; 3279 } 3280 return true; 3281 } 3282 3283 /** 3284 * {@inheritDoc} 3285 * 3286 * @return The default implementation returns true. 3287 */ 3288 public boolean onMenuOpened(int featureId, Menu menu) { 3289 if (featureId == Window.FEATURE_ACTION_BAR) { 3290 initWindowDecorActionBar(); 3291 if (mActionBar != null) { 3292 mActionBar.dispatchMenuVisibilityChanged(true); 3293 } else { 3294 Log.e(TAG, "Tried to open action bar menu with no action bar"); 3295 } 3296 } 3297 return true; 3298 } 3299 3300 /** 3301 * Default implementation of 3302 * {@link android.view.Window.Callback#onMenuItemSelected} 3303 * for activities. This calls through to the new 3304 * {@link #onOptionsItemSelected} method for the 3305 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 3306 * panel, so that subclasses of 3307 * Activity don't need to deal with feature codes. 3308 */ 3309 public boolean onMenuItemSelected(int featureId, MenuItem item) { 3310 CharSequence titleCondensed = item.getTitleCondensed(); 3311 3312 switch (featureId) { 3313 case Window.FEATURE_OPTIONS_PANEL: 3314 // Put event logging here so it gets called even if subclass 3315 // doesn't call through to superclass's implmeentation of each 3316 // of these methods below 3317 if(titleCondensed != null) { 3318 EventLog.writeEvent(50000, 0, titleCondensed.toString()); 3319 } 3320 if (onOptionsItemSelected(item)) { 3321 return true; 3322 } 3323 if (mFragments.dispatchOptionsItemSelected(item)) { 3324 return true; 3325 } 3326 if (item.getItemId() == android.R.id.home && mActionBar != null && 3327 (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) { 3328 if (mParent == null) { 3329 return onNavigateUp(); 3330 } else { 3331 return mParent.onNavigateUpFromChild(this); 3332 } 3333 } 3334 return false; 3335 3336 case Window.FEATURE_CONTEXT_MENU: 3337 if(titleCondensed != null) { 3338 EventLog.writeEvent(50000, 1, titleCondensed.toString()); 3339 } 3340 if (onContextItemSelected(item)) { 3341 return true; 3342 } 3343 return mFragments.dispatchContextItemSelected(item); 3344 3345 default: 3346 return false; 3347 } 3348 } 3349 3350 /** 3351 * Default implementation of 3352 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 3353 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 3354 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 3355 * so that subclasses of Activity don't need to deal with feature codes. 3356 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 3357 * {@link #onContextMenuClosed(Menu)} will be called. 3358 */ 3359 public void onPanelClosed(int featureId, Menu menu) { 3360 switch (featureId) { 3361 case Window.FEATURE_OPTIONS_PANEL: 3362 mFragments.dispatchOptionsMenuClosed(menu); 3363 onOptionsMenuClosed(menu); 3364 break; 3365 3366 case Window.FEATURE_CONTEXT_MENU: 3367 onContextMenuClosed(menu); 3368 break; 3369 3370 case Window.FEATURE_ACTION_BAR: 3371 initWindowDecorActionBar(); 3372 mActionBar.dispatchMenuVisibilityChanged(false); 3373 break; 3374 } 3375 } 3376 3377 /** 3378 * Declare that the options menu has changed, so should be recreated. 3379 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 3380 * time it needs to be displayed. 3381 */ 3382 public void invalidateOptionsMenu() { 3383 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3384 (mActionBar == null || !mActionBar.invalidateOptionsMenu())) { 3385 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 3386 } 3387 } 3388 3389 /** 3390 * Initialize the contents of the Activity's standard options menu. You 3391 * should place your menu items in to <var>menu</var>. 3392 * 3393 * <p>This is only called once, the first time the options menu is 3394 * displayed. To update the menu every time it is displayed, see 3395 * {@link #onPrepareOptionsMenu}. 3396 * 3397 * <p>The default implementation populates the menu with standard system 3398 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 3399 * they will be correctly ordered with application-defined menu items. 3400 * Deriving classes should always call through to the base implementation. 3401 * 3402 * <p>You can safely hold on to <var>menu</var> (and any items created 3403 * from it), making modifications to it as desired, until the next 3404 * time onCreateOptionsMenu() is called. 3405 * 3406 * <p>When you add items to the menu, you can implement the Activity's 3407 * {@link #onOptionsItemSelected} method to handle them there. 3408 * 3409 * @param menu The options menu in which you place your items. 3410 * 3411 * @return You must return true for the menu to be displayed; 3412 * if you return false it will not be shown. 3413 * 3414 * @see #onPrepareOptionsMenu 3415 * @see #onOptionsItemSelected 3416 */ 3417 public boolean onCreateOptionsMenu(Menu menu) { 3418 if (mParent != null) { 3419 return mParent.onCreateOptionsMenu(menu); 3420 } 3421 return true; 3422 } 3423 3424 /** 3425 * Prepare the Screen's standard options menu to be displayed. This is 3426 * called right before the menu is shown, every time it is shown. You can 3427 * use this method to efficiently enable/disable items or otherwise 3428 * dynamically modify the contents. 3429 * 3430 * <p>The default implementation updates the system menu items based on the 3431 * activity's state. Deriving classes should always call through to the 3432 * base class implementation. 3433 * 3434 * @param menu The options menu as last shown or first initialized by 3435 * onCreateOptionsMenu(). 3436 * 3437 * @return You must return true for the menu to be displayed; 3438 * if you return false it will not be shown. 3439 * 3440 * @see #onCreateOptionsMenu 3441 */ 3442 public boolean onPrepareOptionsMenu(Menu menu) { 3443 if (mParent != null) { 3444 return mParent.onPrepareOptionsMenu(menu); 3445 } 3446 return true; 3447 } 3448 3449 /** 3450 * This hook is called whenever an item in your options menu is selected. 3451 * The default implementation simply returns false to have the normal 3452 * processing happen (calling the item's Runnable or sending a message to 3453 * its Handler as appropriate). You can use this method for any items 3454 * for which you would like to do processing without those other 3455 * facilities. 3456 * 3457 * <p>Derived classes should call through to the base class for it to 3458 * perform the default menu handling.</p> 3459 * 3460 * @param item The menu item that was selected. 3461 * 3462 * @return boolean Return false to allow normal menu processing to 3463 * proceed, true to consume it here. 3464 * 3465 * @see #onCreateOptionsMenu 3466 */ 3467 public boolean onOptionsItemSelected(MenuItem item) { 3468 if (mParent != null) { 3469 return mParent.onOptionsItemSelected(item); 3470 } 3471 return false; 3472 } 3473 3474 /** 3475 * This method is called whenever the user chooses to navigate Up within your application's 3476 * activity hierarchy from the action bar. 3477 * 3478 * <p>If the attribute {@link android.R.attr#parentActivityName parentActivityName} 3479 * was specified in the manifest for this activity or an activity-alias to it, 3480 * default Up navigation will be handled automatically. If any activity 3481 * along the parent chain requires extra Intent arguments, the Activity subclass 3482 * should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)} 3483 * to supply those arguments.</p> 3484 * 3485 * <p>See <a href="{@docRoot}guide/components/tasks-and-back-stack.html">Tasks and Back Stack</a> 3486 * from the developer guide and <a href="{@docRoot}design/patterns/navigation.html">Navigation</a> 3487 * from the design guide for more information about navigating within your app.</p> 3488 * 3489 * <p>See the {@link TaskStackBuilder} class and the Activity methods 3490 * {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and 3491 * {@link #navigateUpTo(Intent)} for help implementing custom Up navigation. 3492 * The AppNavigation sample application in the Android SDK is also available for reference.</p> 3493 * 3494 * @return true if Up navigation completed successfully and this Activity was finished, 3495 * false otherwise. 3496 */ 3497 public boolean onNavigateUp() { 3498 // Automatically handle hierarchical Up navigation if the proper 3499 // metadata is available. 3500 Intent upIntent = getParentActivityIntent(); 3501 if (upIntent != null) { 3502 if (mActivityInfo.taskAffinity == null) { 3503 // Activities with a null affinity are special; they really shouldn't 3504 // specify a parent activity intent in the first place. Just finish 3505 // the current activity and call it a day. 3506 finish(); 3507 } else if (shouldUpRecreateTask(upIntent)) { 3508 TaskStackBuilder b = TaskStackBuilder.create(this); 3509 onCreateNavigateUpTaskStack(b); 3510 onPrepareNavigateUpTaskStack(b); 3511 b.startActivities(); 3512 3513 // We can't finishAffinity if we have a result. 3514 // Fall back and simply finish the current activity instead. 3515 if (mResultCode != RESULT_CANCELED || mResultData != null) { 3516 // Tell the developer what's going on to avoid hair-pulling. 3517 Log.i(TAG, "onNavigateUp only finishing topmost activity to return a result"); 3518 finish(); 3519 } else { 3520 finishAffinity(); 3521 } 3522 } else { 3523 navigateUpTo(upIntent); 3524 } 3525 return true; 3526 } 3527 return false; 3528 } 3529 3530 /** 3531 * This is called when a child activity of this one attempts to navigate up. 3532 * The default implementation simply calls onNavigateUp() on this activity (the parent). 3533 * 3534 * @param child The activity making the call. 3535 */ 3536 public boolean onNavigateUpFromChild(Activity child) { 3537 return onNavigateUp(); 3538 } 3539 3540 /** 3541 * Define the synthetic task stack that will be generated during Up navigation from 3542 * a different task. 3543 * 3544 * <p>The default implementation of this method adds the parent chain of this activity 3545 * as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications 3546 * may choose to override this method to construct the desired task stack in a different 3547 * way.</p> 3548 * 3549 * <p>This method will be invoked by the default implementation of {@link #onNavigateUp()} 3550 * if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent 3551 * returned by {@link #getParentActivityIntent()}.</p> 3552 * 3553 * <p>Applications that wish to supply extra Intent parameters to the parent stack defined 3554 * by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}.</p> 3555 * 3556 * @param builder An empty TaskStackBuilder - the application should add intents representing 3557 * the desired task stack 3558 */ 3559 public void onCreateNavigateUpTaskStack(TaskStackBuilder builder) { 3560 builder.addParentStack(this); 3561 } 3562 3563 /** 3564 * Prepare the synthetic task stack that will be generated during Up navigation 3565 * from a different task. 3566 * 3567 * <p>This method receives the {@link TaskStackBuilder} with the constructed series of 3568 * Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}. 3569 * If any extra data should be added to these intents before launching the new task, 3570 * the application should override this method and add that data here.</p> 3571 * 3572 * @param builder A TaskStackBuilder that has been populated with Intents by 3573 * onCreateNavigateUpTaskStack. 3574 */ 3575 public void onPrepareNavigateUpTaskStack(TaskStackBuilder builder) { 3576 } 3577 3578 /** 3579 * This hook is called whenever the options menu is being closed (either by the user canceling 3580 * the menu with the back/menu button, or when an item is selected). 3581 * 3582 * @param menu The options menu as last shown or first initialized by 3583 * onCreateOptionsMenu(). 3584 */ 3585 public void onOptionsMenuClosed(Menu menu) { 3586 if (mParent != null) { 3587 mParent.onOptionsMenuClosed(menu); 3588 } 3589 } 3590 3591 /** 3592 * Programmatically opens the options menu. If the options menu is already 3593 * open, this method does nothing. 3594 */ 3595 public void openOptionsMenu() { 3596 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3597 (mActionBar == null || !mActionBar.openOptionsMenu())) { 3598 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 3599 } 3600 } 3601 3602 /** 3603 * Progammatically closes the options menu. If the options menu is already 3604 * closed, this method does nothing. 3605 */ 3606 public void closeOptionsMenu() { 3607 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL)) { 3608 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 3609 } 3610 } 3611 3612 /** 3613 * Called when a context menu for the {@code view} is about to be shown. 3614 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 3615 * time the context menu is about to be shown and should be populated for 3616 * the view (or item inside the view for {@link AdapterView} subclasses, 3617 * this can be found in the {@code menuInfo})). 3618 * <p> 3619 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 3620 * item has been selected. 3621 * <p> 3622 * It is not safe to hold onto the context menu after this method returns. 3623 * 3624 */ 3625 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 3626 } 3627 3628 /** 3629 * Registers a context menu to be shown for the given view (multiple views 3630 * can show the context menu). This method will set the 3631 * {@link OnCreateContextMenuListener} on the view to this activity, so 3632 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 3633 * called when it is time to show the context menu. 3634 * 3635 * @see #unregisterForContextMenu(View) 3636 * @param view The view that should show a context menu. 3637 */ 3638 public void registerForContextMenu(View view) { 3639 view.setOnCreateContextMenuListener(this); 3640 } 3641 3642 /** 3643 * Prevents a context menu to be shown for the given view. This method will remove the 3644 * {@link OnCreateContextMenuListener} on the view. 3645 * 3646 * @see #registerForContextMenu(View) 3647 * @param view The view that should stop showing a context menu. 3648 */ 3649 public void unregisterForContextMenu(View view) { 3650 view.setOnCreateContextMenuListener(null); 3651 } 3652 3653 /** 3654 * Programmatically opens the context menu for a particular {@code view}. 3655 * The {@code view} should have been added via 3656 * {@link #registerForContextMenu(View)}. 3657 * 3658 * @param view The view to show the context menu for. 3659 */ 3660 public void openContextMenu(View view) { 3661 view.showContextMenu(); 3662 } 3663 3664 /** 3665 * Programmatically closes the most recently opened context menu, if showing. 3666 */ 3667 public void closeContextMenu() { 3668 if (mWindow.hasFeature(Window.FEATURE_CONTEXT_MENU)) { 3669 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 3670 } 3671 } 3672 3673 /** 3674 * This hook is called whenever an item in a context menu is selected. The 3675 * default implementation simply returns false to have the normal processing 3676 * happen (calling the item's Runnable or sending a message to its Handler 3677 * as appropriate). You can use this method for any items for which you 3678 * would like to do processing without those other facilities. 3679 * <p> 3680 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 3681 * View that added this menu item. 3682 * <p> 3683 * Derived classes should call through to the base class for it to perform 3684 * the default menu handling. 3685 * 3686 * @param item The context menu item that was selected. 3687 * @return boolean Return false to allow normal context menu processing to 3688 * proceed, true to consume it here. 3689 */ 3690 public boolean onContextItemSelected(MenuItem item) { 3691 if (mParent != null) { 3692 return mParent.onContextItemSelected(item); 3693 } 3694 return false; 3695 } 3696 3697 /** 3698 * This hook is called whenever the context menu is being closed (either by 3699 * the user canceling the menu with the back/menu button, or when an item is 3700 * selected). 3701 * 3702 * @param menu The context menu that is being closed. 3703 */ 3704 public void onContextMenuClosed(Menu menu) { 3705 if (mParent != null) { 3706 mParent.onContextMenuClosed(menu); 3707 } 3708 } 3709 3710 /** 3711 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 3712 */ 3713 @Deprecated 3714 protected Dialog onCreateDialog(int id) { 3715 return null; 3716 } 3717 3718 /** 3719 * Callback for creating dialogs that are managed (saved and restored) for you 3720 * by the activity. The default implementation calls through to 3721 * {@link #onCreateDialog(int)} for compatibility. 3722 * 3723 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3724 * or later, consider instead using a {@link DialogFragment} instead.</em> 3725 * 3726 * <p>If you use {@link #showDialog(int)}, the activity will call through to 3727 * this method the first time, and hang onto it thereafter. Any dialog 3728 * that is created by this method will automatically be saved and restored 3729 * for you, including whether it is showing. 3730 * 3731 * <p>If you would like the activity to manage saving and restoring dialogs 3732 * for you, you should override this method and handle any ids that are 3733 * passed to {@link #showDialog}. 3734 * 3735 * <p>If you would like an opportunity to prepare your dialog before it is shown, 3736 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 3737 * 3738 * @param id The id of the dialog. 3739 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3740 * @return The dialog. If you return null, the dialog will not be created. 3741 * 3742 * @see #onPrepareDialog(int, Dialog, Bundle) 3743 * @see #showDialog(int, Bundle) 3744 * @see #dismissDialog(int) 3745 * @see #removeDialog(int) 3746 * 3747 * @deprecated Use the new {@link DialogFragment} class with 3748 * {@link FragmentManager} instead; this is also 3749 * available on older platforms through the Android compatibility package. 3750 */ 3751 @Nullable 3752 @Deprecated 3753 protected Dialog onCreateDialog(int id, Bundle args) { 3754 return onCreateDialog(id); 3755 } 3756 3757 /** 3758 * @deprecated Old no-arguments version of 3759 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 3760 */ 3761 @Deprecated 3762 protected void onPrepareDialog(int id, Dialog dialog) { 3763 dialog.setOwnerActivity(this); 3764 } 3765 3766 /** 3767 * Provides an opportunity to prepare a managed dialog before it is being 3768 * shown. The default implementation calls through to 3769 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 3770 * 3771 * <p> 3772 * Override this if you need to update a managed dialog based on the state 3773 * of the application each time it is shown. For example, a time picker 3774 * dialog might want to be updated with the current time. You should call 3775 * through to the superclass's implementation. The default implementation 3776 * will set this Activity as the owner activity on the Dialog. 3777 * 3778 * @param id The id of the managed dialog. 3779 * @param dialog The dialog. 3780 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3781 * @see #onCreateDialog(int, Bundle) 3782 * @see #showDialog(int) 3783 * @see #dismissDialog(int) 3784 * @see #removeDialog(int) 3785 * 3786 * @deprecated Use the new {@link DialogFragment} class with 3787 * {@link FragmentManager} instead; this is also 3788 * available on older platforms through the Android compatibility package. 3789 */ 3790 @Deprecated 3791 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 3792 onPrepareDialog(id, dialog); 3793 } 3794 3795 /** 3796 * Simple version of {@link #showDialog(int, Bundle)} that does not 3797 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 3798 * with null arguments. 3799 * 3800 * @deprecated Use the new {@link DialogFragment} class with 3801 * {@link FragmentManager} instead; this is also 3802 * available on older platforms through the Android compatibility package. 3803 */ 3804 @Deprecated 3805 public final void showDialog(int id) { 3806 showDialog(id, null); 3807 } 3808 3809 /** 3810 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 3811 * will be made with the same id the first time this is called for a given 3812 * id. From thereafter, the dialog will be automatically saved and restored. 3813 * 3814 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3815 * or later, consider instead using a {@link DialogFragment} instead.</em> 3816 * 3817 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 3818 * be made to provide an opportunity to do any timely preparation. 3819 * 3820 * @param id The id of the managed dialog. 3821 * @param args Arguments to pass through to the dialog. These will be saved 3822 * and restored for you. Note that if the dialog is already created, 3823 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 3824 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 3825 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 3826 * @return Returns true if the Dialog was created; false is returned if 3827 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 3828 * 3829 * @see Dialog 3830 * @see #onCreateDialog(int, Bundle) 3831 * @see #onPrepareDialog(int, Dialog, Bundle) 3832 * @see #dismissDialog(int) 3833 * @see #removeDialog(int) 3834 * 3835 * @deprecated Use the new {@link DialogFragment} class with 3836 * {@link FragmentManager} instead; this is also 3837 * available on older platforms through the Android compatibility package. 3838 */ 3839 @Deprecated 3840 public final boolean showDialog(int id, Bundle args) { 3841 if (mManagedDialogs == null) { 3842 mManagedDialogs = new SparseArray<ManagedDialog>(); 3843 } 3844 ManagedDialog md = mManagedDialogs.get(id); 3845 if (md == null) { 3846 md = new ManagedDialog(); 3847 md.mDialog = createDialog(id, null, args); 3848 if (md.mDialog == null) { 3849 return false; 3850 } 3851 mManagedDialogs.put(id, md); 3852 } 3853 3854 md.mArgs = args; 3855 onPrepareDialog(id, md.mDialog, args); 3856 md.mDialog.show(); 3857 return true; 3858 } 3859 3860 /** 3861 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 3862 * 3863 * @param id The id of the managed dialog. 3864 * 3865 * @throws IllegalArgumentException if the id was not previously shown via 3866 * {@link #showDialog(int)}. 3867 * 3868 * @see #onCreateDialog(int, Bundle) 3869 * @see #onPrepareDialog(int, Dialog, Bundle) 3870 * @see #showDialog(int) 3871 * @see #removeDialog(int) 3872 * 3873 * @deprecated Use the new {@link DialogFragment} class with 3874 * {@link FragmentManager} instead; this is also 3875 * available on older platforms through the Android compatibility package. 3876 */ 3877 @Deprecated 3878 public final void dismissDialog(int id) { 3879 if (mManagedDialogs == null) { 3880 throw missingDialog(id); 3881 } 3882 3883 final ManagedDialog md = mManagedDialogs.get(id); 3884 if (md == null) { 3885 throw missingDialog(id); 3886 } 3887 md.mDialog.dismiss(); 3888 } 3889 3890 /** 3891 * Creates an exception to throw if a user passed in a dialog id that is 3892 * unexpected. 3893 */ 3894 private IllegalArgumentException missingDialog(int id) { 3895 return new IllegalArgumentException("no dialog with id " + id + " was ever " 3896 + "shown via Activity#showDialog"); 3897 } 3898 3899 /** 3900 * Removes any internal references to a dialog managed by this Activity. 3901 * If the dialog is showing, it will dismiss it as part of the clean up. 3902 * 3903 * <p>This can be useful if you know that you will never show a dialog again and 3904 * want to avoid the overhead of saving and restoring it in the future. 3905 * 3906 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 3907 * will not throw an exception if you try to remove an ID that does not 3908 * currently have an associated dialog.</p> 3909 * 3910 * @param id The id of the managed dialog. 3911 * 3912 * @see #onCreateDialog(int, Bundle) 3913 * @see #onPrepareDialog(int, Dialog, Bundle) 3914 * @see #showDialog(int) 3915 * @see #dismissDialog(int) 3916 * 3917 * @deprecated Use the new {@link DialogFragment} class with 3918 * {@link FragmentManager} instead; this is also 3919 * available on older platforms through the Android compatibility package. 3920 */ 3921 @Deprecated 3922 public final void removeDialog(int id) { 3923 if (mManagedDialogs != null) { 3924 final ManagedDialog md = mManagedDialogs.get(id); 3925 if (md != null) { 3926 md.mDialog.dismiss(); 3927 mManagedDialogs.remove(id); 3928 } 3929 } 3930 } 3931 3932 /** 3933 * This hook is called when the user signals the desire to start a search. 3934 * 3935 * <p>You can use this function as a simple way to launch the search UI, in response to a 3936 * menu item, search button, or other widgets within your activity. Unless overidden, 3937 * calling this function is the same as calling 3938 * {@link #startSearch startSearch(null, false, null, false)}, which launches 3939 * search for the current activity as specified in its manifest, see {@link SearchManager}. 3940 * 3941 * <p>You can override this function to force global search, e.g. in response to a dedicated 3942 * search key, or to block search entirely (by simply returning false). 3943 * 3944 * <p>Note: when running in a {@link Configuration#UI_MODE_TYPE_TELEVISION}, the default 3945 * implementation changes to simply return false and you must supply your own custom 3946 * implementation if you want to support search.</p> 3947 * 3948 * @param searchEvent The {@link SearchEvent} that signaled this search. 3949 * @return Returns {@code true} if search launched, and {@code false} if the activity does 3950 * not respond to search. The default implementation always returns {@code true}, except 3951 * when in {@link Configuration#UI_MODE_TYPE_TELEVISION} mode where it returns false. 3952 * 3953 * @see android.app.SearchManager 3954 */ 3955 public boolean onSearchRequested(@Nullable SearchEvent searchEvent) { 3956 mSearchEvent = searchEvent; 3957 boolean result = onSearchRequested(); 3958 mSearchEvent = null; 3959 return result; 3960 } 3961 3962 /** 3963 * @see #onSearchRequested(SearchEvent) 3964 */ 3965 public boolean onSearchRequested() { 3966 if ((getResources().getConfiguration().uiMode&Configuration.UI_MODE_TYPE_MASK) 3967 != Configuration.UI_MODE_TYPE_TELEVISION) { 3968 startSearch(null, false, null, false); 3969 return true; 3970 } else { 3971 return false; 3972 } 3973 } 3974 3975 /** 3976 * During the onSearchRequested() callbacks, this function will return the 3977 * {@link SearchEvent} that triggered the callback, if it exists. 3978 * 3979 * @return SearchEvent The SearchEvent that triggered the {@link 3980 * #onSearchRequested} callback. 3981 */ 3982 public final SearchEvent getSearchEvent() { 3983 return mSearchEvent; 3984 } 3985 3986 /** 3987 * This hook is called to launch the search UI. 3988 * 3989 * <p>It is typically called from onSearchRequested(), either directly from 3990 * Activity.onSearchRequested() or from an overridden version in any given 3991 * Activity. If your goal is simply to activate search, it is preferred to call 3992 * onSearchRequested(), which may have been overridden elsewhere in your Activity. If your goal 3993 * is to inject specific data such as context data, it is preferred to <i>override</i> 3994 * onSearchRequested(), so that any callers to it will benefit from the override. 3995 * 3996 * @param initialQuery Any non-null non-empty string will be inserted as 3997 * pre-entered text in the search query box. 3998 * @param selectInitialQuery If true, the initial query will be preselected, which means that 3999 * any further typing will replace it. This is useful for cases where an entire pre-formed 4000 * query is being inserted. If false, the selection point will be placed at the end of the 4001 * inserted query. This is useful when the inserted query is text that the user entered, 4002 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 4003 * if initialQuery is a non-empty string.</i> 4004 * @param appSearchData An application can insert application-specific 4005 * context here, in order to improve quality or specificity of its own 4006 * searches. This data will be returned with SEARCH intent(s). Null if 4007 * no extra data is required. 4008 * @param globalSearch If false, this will only launch the search that has been specifically 4009 * defined by the application (which is usually defined as a local search). If no default 4010 * search is defined in the current application or activity, global search will be launched. 4011 * If true, this will always launch a platform-global (e.g. web-based) search instead. 4012 * 4013 * @see android.app.SearchManager 4014 * @see #onSearchRequested 4015 */ 4016 public void startSearch(@Nullable String initialQuery, boolean selectInitialQuery, 4017 @Nullable Bundle appSearchData, boolean globalSearch) { 4018 ensureSearchManager(); 4019 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 4020 appSearchData, globalSearch); 4021 } 4022 4023 /** 4024 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 4025 * the search dialog. Made available for testing purposes. 4026 * 4027 * @param query The query to trigger. If empty, the request will be ignored. 4028 * @param appSearchData An application can insert application-specific 4029 * context here, in order to improve quality or specificity of its own 4030 * searches. This data will be returned with SEARCH intent(s). Null if 4031 * no extra data is required. 4032 */ 4033 public void triggerSearch(String query, @Nullable Bundle appSearchData) { 4034 ensureSearchManager(); 4035 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 4036 } 4037 4038 /** 4039 * Request that key events come to this activity. Use this if your 4040 * activity has no views with focus, but the activity still wants 4041 * a chance to process key events. 4042 * 4043 * @see android.view.Window#takeKeyEvents 4044 */ 4045 public void takeKeyEvents(boolean get) { 4046 getWindow().takeKeyEvents(get); 4047 } 4048 4049 /** 4050 * Enable extended window features. This is a convenience for calling 4051 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 4052 * 4053 * @param featureId The desired feature as defined in 4054 * {@link android.view.Window}. 4055 * @return Returns true if the requested feature is supported and now 4056 * enabled. 4057 * 4058 * @see android.view.Window#requestFeature 4059 */ 4060 public final boolean requestWindowFeature(int featureId) { 4061 return getWindow().requestFeature(featureId); 4062 } 4063 4064 /** 4065 * Convenience for calling 4066 * {@link android.view.Window#setFeatureDrawableResource}. 4067 */ 4068 public final void setFeatureDrawableResource(int featureId, @DrawableRes int resId) { 4069 getWindow().setFeatureDrawableResource(featureId, resId); 4070 } 4071 4072 /** 4073 * Convenience for calling 4074 * {@link android.view.Window#setFeatureDrawableUri}. 4075 */ 4076 public final void setFeatureDrawableUri(int featureId, Uri uri) { 4077 getWindow().setFeatureDrawableUri(featureId, uri); 4078 } 4079 4080 /** 4081 * Convenience for calling 4082 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 4083 */ 4084 public final void setFeatureDrawable(int featureId, Drawable drawable) { 4085 getWindow().setFeatureDrawable(featureId, drawable); 4086 } 4087 4088 /** 4089 * Convenience for calling 4090 * {@link android.view.Window#setFeatureDrawableAlpha}. 4091 */ 4092 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 4093 getWindow().setFeatureDrawableAlpha(featureId, alpha); 4094 } 4095 4096 /** 4097 * Convenience for calling 4098 * {@link android.view.Window#getLayoutInflater}. 4099 */ 4100 @NonNull 4101 public LayoutInflater getLayoutInflater() { 4102 return getWindow().getLayoutInflater(); 4103 } 4104 4105 /** 4106 * Returns a {@link MenuInflater} with this context. 4107 */ 4108 @NonNull 4109 public MenuInflater getMenuInflater() { 4110 // Make sure that action views can get an appropriate theme. 4111 if (mMenuInflater == null) { 4112 initWindowDecorActionBar(); 4113 if (mActionBar != null) { 4114 mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this); 4115 } else { 4116 mMenuInflater = new MenuInflater(this); 4117 } 4118 } 4119 return mMenuInflater; 4120 } 4121 4122 @Override 4123 public void setTheme(int resid) { 4124 super.setTheme(resid); 4125 mWindow.setTheme(resid); 4126 } 4127 4128 @Override 4129 protected void onApplyThemeResource(Resources.Theme theme, @StyleRes int resid, 4130 boolean first) { 4131 if (mParent == null) { 4132 super.onApplyThemeResource(theme, resid, first); 4133 } else { 4134 try { 4135 theme.setTo(mParent.getTheme()); 4136 } catch (Exception e) { 4137 // Empty 4138 } 4139 theme.applyStyle(resid, false); 4140 } 4141 4142 // Get the primary color and update the TaskDescription for this activity 4143 TypedArray a = theme.obtainStyledAttributes( 4144 com.android.internal.R.styleable.ActivityTaskDescription); 4145 if (mTaskDescription.getPrimaryColor() == 0) { 4146 int colorPrimary = a.getColor( 4147 com.android.internal.R.styleable.ActivityTaskDescription_colorPrimary, 0); 4148 if (colorPrimary != 0 && Color.alpha(colorPrimary) == 0xFF) { 4149 mTaskDescription.setPrimaryColor(colorPrimary); 4150 } 4151 } 4152 // For dev-preview only. 4153 if (mTaskDescription.getBackgroundColor() == 0) { 4154 int colorBackground = a.getColor( 4155 com.android.internal.R.styleable.ActivityTaskDescription_colorBackground, 0); 4156 if (colorBackground != 0 && Color.alpha(colorBackground) == 0xFF) { 4157 mTaskDescription.setBackgroundColor(colorBackground); 4158 } 4159 } 4160 a.recycle(); 4161 setTaskDescription(mTaskDescription); 4162 } 4163 4164 /** 4165 * Requests permissions to be granted to this application. These permissions 4166 * must be requested in your manifest, they should not be granted to your app, 4167 * and they should have protection level {@link android.content.pm.PermissionInfo 4168 * #PROTECTION_DANGEROUS dangerous}, regardless whether they are declared by 4169 * the platform or a third-party app. 4170 * <p> 4171 * Normal permissions {@link android.content.pm.PermissionInfo#PROTECTION_NORMAL} 4172 * are granted at install time if requested in the manifest. Signature permissions 4173 * {@link android.content.pm.PermissionInfo#PROTECTION_SIGNATURE} are granted at 4174 * install time if requested in the manifest and the signature of your app matches 4175 * the signature of the app declaring the permissions. 4176 * </p> 4177 * <p> 4178 * If your app does not have the requested permissions the user will be presented 4179 * with UI for accepting them. After the user has accepted or rejected the 4180 * requested permissions you will receive a callback on {@link 4181 * #onRequestPermissionsResult(int, String[], int[])} reporting whether the 4182 * permissions were granted or not. 4183 * </p> 4184 * <p> 4185 * Note that requesting a permission does not guarantee it will be granted and 4186 * your app should be able to run without having this permission. 4187 * </p> 4188 * <p> 4189 * This method may start an activity allowing the user to choose which permissions 4190 * to grant and which to reject. Hence, you should be prepared that your activity 4191 * may be paused and resumed. Further, granting some permissions may require 4192 * a restart of you application. In such a case, the system will recreate the 4193 * activity stack before delivering the result to {@link 4194 * #onRequestPermissionsResult(int, String[], int[])}. 4195 * </p> 4196 * <p> 4197 * When checking whether you have a permission you should use {@link 4198 * #checkSelfPermission(String)}. 4199 * </p> 4200 * <p> 4201 * Calling this API for permissions already granted to your app would show UI 4202 * to the user to decide whether the app can still hold these permissions. This 4203 * can be useful if the way your app uses data guarded by the permissions 4204 * changes significantly. 4205 * </p> 4206 * <p> 4207 * You cannot request a permission if your activity sets {@link 4208 * android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 4209 * <code>true</code> because in this case the activity would not receive 4210 * result callbacks including {@link #onRequestPermissionsResult(int, String[], int[])}. 4211 * </p> 4212 * <p> 4213 * The <a href="http://developer.android.com/samples/RuntimePermissions/index.html"> 4214 * RuntimePermissions</a> sample app demonstrates how to use this method to 4215 * request permissions at run time. 4216 * </p> 4217 * 4218 * @param permissions The requested permissions. Must me non-null and not empty. 4219 * @param requestCode Application specific request code to match with a result 4220 * reported to {@link #onRequestPermissionsResult(int, String[], int[])}. 4221 * Should be >= 0. 4222 * 4223 * @throws IllegalArgumentException if requestCode is negative. 4224 * 4225 * @see #onRequestPermissionsResult(int, String[], int[]) 4226 * @see #checkSelfPermission(String) 4227 * @see #shouldShowRequestPermissionRationale(String) 4228 */ 4229 public final void requestPermissions(@NonNull String[] permissions, int requestCode) { 4230 if (requestCode < 0) { 4231 throw new IllegalArgumentException("requestCode should be >= 0"); 4232 } 4233 if (mHasCurrentPermissionsRequest) { 4234 Log.w(TAG, "Can reqeust only one set of permissions at a time"); 4235 // Dispatch the callback with empty arrays which means a cancellation. 4236 onRequestPermissionsResult(requestCode, new String[0], new int[0]); 4237 return; 4238 } 4239 Intent intent = getPackageManager().buildRequestPermissionsIntent(permissions); 4240 startActivityForResult(REQUEST_PERMISSIONS_WHO_PREFIX, intent, requestCode, null); 4241 mHasCurrentPermissionsRequest = true; 4242 } 4243 4244 /** 4245 * Callback for the result from requesting permissions. This method 4246 * is invoked for every call on {@link #requestPermissions(String[], int)}. 4247 * <p> 4248 * <strong>Note:</strong> It is possible that the permissions request interaction 4249 * with the user is interrupted. In this case you will receive empty permissions 4250 * and results arrays which should be treated as a cancellation. 4251 * </p> 4252 * 4253 * @param requestCode The request code passed in {@link #requestPermissions(String[], int)}. 4254 * @param permissions The requested permissions. Never null. 4255 * @param grantResults The grant results for the corresponding permissions 4256 * which is either {@link android.content.pm.PackageManager#PERMISSION_GRANTED} 4257 * or {@link android.content.pm.PackageManager#PERMISSION_DENIED}. Never null. 4258 * 4259 * @see #requestPermissions(String[], int) 4260 */ 4261 public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, 4262 @NonNull int[] grantResults) { 4263 /* callback - no nothing */ 4264 } 4265 4266 /** 4267 * Gets whether you should show UI with rationale for requesting a permission. 4268 * You should do this only if you do not have the permission and the context in 4269 * which the permission is requested does not clearly communicate to the user 4270 * what would be the benefit from granting this permission. 4271 * <p> 4272 * For example, if you write a camera app, requesting the camera permission 4273 * would be expected by the user and no rationale for why it is requested is 4274 * needed. If however, the app needs location for tagging photos then a non-tech 4275 * savvy user may wonder how location is related to taking photos. In this case 4276 * you may choose to show UI with rationale of requesting this permission. 4277 * </p> 4278 * 4279 * @param permission A permission your app wants to request. 4280 * @return Whether you can show permission rationale UI. 4281 * 4282 * @see #checkSelfPermission(String) 4283 * @see #requestPermissions(String[], int) 4284 * @see #onRequestPermissionsResult(int, String[], int[]) 4285 */ 4286 public boolean shouldShowRequestPermissionRationale(@NonNull String permission) { 4287 return getPackageManager().shouldShowRequestPermissionRationale(permission); 4288 } 4289 4290 /** 4291 * Same as calling {@link #startActivityForResult(Intent, int, Bundle)} 4292 * with no options. 4293 * 4294 * @param intent The intent to start. 4295 * @param requestCode If >= 0, this code will be returned in 4296 * onActivityResult() when the activity exits. 4297 * 4298 * @throws android.content.ActivityNotFoundException 4299 * 4300 * @see #startActivity 4301 */ 4302 public void startActivityForResult(@RequiresPermission Intent intent, int requestCode) { 4303 startActivityForResult(intent, requestCode, null); 4304 } 4305 4306 /** 4307 * Launch an activity for which you would like a result when it finished. 4308 * When this activity exits, your 4309 * onActivityResult() method will be called with the given requestCode. 4310 * Using a negative requestCode is the same as calling 4311 * {@link #startActivity} (the activity is not launched as a sub-activity). 4312 * 4313 * <p>Note that this method should only be used with Intent protocols 4314 * that are defined to return a result. In other protocols (such as 4315 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 4316 * not get the result when you expect. For example, if the activity you 4317 * are launching uses {@link Intent#FLAG_ACTIVITY_NEW_TASK}, it will not 4318 * run in your task and thus you will immediately receive a cancel result. 4319 * 4320 * <p>As a special case, if you call startActivityForResult() with a requestCode 4321 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 4322 * activity, then your window will not be displayed until a result is 4323 * returned back from the started activity. This is to avoid visible 4324 * flickering when redirecting to another activity. 4325 * 4326 * <p>This method throws {@link android.content.ActivityNotFoundException} 4327 * if there was no Activity found to run the given Intent. 4328 * 4329 * @param intent The intent to start. 4330 * @param requestCode If >= 0, this code will be returned in 4331 * onActivityResult() when the activity exits. 4332 * @param options Additional options for how the Activity should be started. 4333 * See {@link android.content.Context#startActivity(Intent, Bundle) 4334 * Context.startActivity(Intent, Bundle)} for more details. 4335 * 4336 * @throws android.content.ActivityNotFoundException 4337 * 4338 * @see #startActivity 4339 */ 4340 public void startActivityForResult(@RequiresPermission Intent intent, int requestCode, 4341 @Nullable Bundle options) { 4342 if (mParent == null) { 4343 options = transferSpringboardActivityOptions(options); 4344 Instrumentation.ActivityResult ar = 4345 mInstrumentation.execStartActivity( 4346 this, mMainThread.getApplicationThread(), mToken, this, 4347 intent, requestCode, options); 4348 if (ar != null) { 4349 mMainThread.sendActivityResult( 4350 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 4351 ar.getResultData()); 4352 } 4353 if (requestCode >= 0) { 4354 // If this start is requesting a result, we can avoid making 4355 // the activity visible until the result is received. Setting 4356 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4357 // activity hidden during this time, to avoid flickering. 4358 // This can only be done when a result is requested because 4359 // that guarantees we will get information back when the 4360 // activity is finished, no matter what happens to it. 4361 mStartedActivity = true; 4362 } 4363 4364 cancelInputsAndStartExitTransition(options); 4365 // TODO Consider clearing/flushing other event sources and events for child windows. 4366 } else { 4367 if (options != null) { 4368 mParent.startActivityFromChild(this, intent, requestCode, options); 4369 } else { 4370 // Note we want to go through this method for compatibility with 4371 // existing applications that may have overridden it. 4372 mParent.startActivityFromChild(this, intent, requestCode); 4373 } 4374 } 4375 } 4376 4377 /** 4378 * Cancels pending inputs and if an Activity Transition is to be run, starts the transition. 4379 * 4380 * @param options The ActivityOptions bundle used to start an Activity. 4381 */ 4382 private void cancelInputsAndStartExitTransition(Bundle options) { 4383 final View decor = mWindow != null ? mWindow.peekDecorView() : null; 4384 if (decor != null) { 4385 decor.cancelPendingInputEvents(); 4386 } 4387 if (options != null && !isTopOfTask()) { 4388 mActivityTransitionState.startExitOutTransition(this, options); 4389 } 4390 } 4391 4392 private Bundle transferSpringboardActivityOptions(Bundle options) { 4393 if (options == null && (mWindow != null && !mWindow.isActive())) { 4394 final ActivityOptions activityOptions = getActivityOptions(); 4395 if (activityOptions != null && 4396 activityOptions.getAnimationType() == ActivityOptions.ANIM_SCENE_TRANSITION) { 4397 return activityOptions.toBundle(); 4398 } 4399 } 4400 return options; 4401 } 4402 4403 /** 4404 * @hide Implement to provide correct calling token. 4405 */ 4406 public void startActivityForResultAsUser(Intent intent, int requestCode, UserHandle user) { 4407 startActivityForResultAsUser(intent, requestCode, null, user); 4408 } 4409 4410 /** 4411 * @hide Implement to provide correct calling token. 4412 */ 4413 public void startActivityForResultAsUser(Intent intent, int requestCode, 4414 @Nullable Bundle options, UserHandle user) { 4415 if (mParent != null) { 4416 throw new RuntimeException("Can't be called from a child"); 4417 } 4418 options = transferSpringboardActivityOptions(options); 4419 Instrumentation.ActivityResult ar = mInstrumentation.execStartActivity( 4420 this, mMainThread.getApplicationThread(), mToken, this, intent, requestCode, 4421 options, user); 4422 if (ar != null) { 4423 mMainThread.sendActivityResult( 4424 mToken, mEmbeddedID, requestCode, ar.getResultCode(), ar.getResultData()); 4425 } 4426 if (requestCode >= 0) { 4427 // If this start is requesting a result, we can avoid making 4428 // the activity visible until the result is received. Setting 4429 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4430 // activity hidden during this time, to avoid flickering. 4431 // This can only be done when a result is requested because 4432 // that guarantees we will get information back when the 4433 // activity is finished, no matter what happens to it. 4434 mStartedActivity = true; 4435 } 4436 4437 cancelInputsAndStartExitTransition(options); 4438 } 4439 4440 /** 4441 * @hide Implement to provide correct calling token. 4442 */ 4443 public void startActivityAsUser(Intent intent, UserHandle user) { 4444 startActivityAsUser(intent, null, user); 4445 } 4446 4447 /** 4448 * @hide Implement to provide correct calling token. 4449 */ 4450 public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) { 4451 if (mParent != null) { 4452 throw new RuntimeException("Can't be called from a child"); 4453 } 4454 options = transferSpringboardActivityOptions(options); 4455 Instrumentation.ActivityResult ar = 4456 mInstrumentation.execStartActivity( 4457 this, mMainThread.getApplicationThread(), mToken, this, 4458 intent, -1, options, user); 4459 if (ar != null) { 4460 mMainThread.sendActivityResult( 4461 mToken, mEmbeddedID, -1, ar.getResultCode(), 4462 ar.getResultData()); 4463 } 4464 cancelInputsAndStartExitTransition(options); 4465 } 4466 4467 /** 4468 * Start a new activity as if it was started by the activity that started our 4469 * current activity. This is for the resolver and chooser activities, which operate 4470 * as intermediaries that dispatch their intent to the target the user selects -- to 4471 * do this, they must perform all security checks including permission grants as if 4472 * their launch had come from the original activity. 4473 * @param intent The Intent to start. 4474 * @param options ActivityOptions or null. 4475 * @param ignoreTargetSecurity If true, the activity manager will not check whether the 4476 * caller it is doing the start is, is actually allowed to start the target activity. 4477 * If you set this to true, you must set an explicit component in the Intent and do any 4478 * appropriate security checks yourself. 4479 * @param userId The user the new activity should run as. 4480 * @hide 4481 */ 4482 public void startActivityAsCaller(Intent intent, @Nullable Bundle options, 4483 boolean ignoreTargetSecurity, int userId) { 4484 if (mParent != null) { 4485 throw new RuntimeException("Can't be called from a child"); 4486 } 4487 options = transferSpringboardActivityOptions(options); 4488 Instrumentation.ActivityResult ar = 4489 mInstrumentation.execStartActivityAsCaller( 4490 this, mMainThread.getApplicationThread(), mToken, this, 4491 intent, -1, options, ignoreTargetSecurity, userId); 4492 if (ar != null) { 4493 mMainThread.sendActivityResult( 4494 mToken, mEmbeddedID, -1, ar.getResultCode(), 4495 ar.getResultData()); 4496 } 4497 cancelInputsAndStartExitTransition(options); 4498 } 4499 4500 /** 4501 * Same as calling {@link #startIntentSenderForResult(IntentSender, int, 4502 * Intent, int, int, int, Bundle)} with no options. 4503 * 4504 * @param intent The IntentSender to launch. 4505 * @param requestCode If >= 0, this code will be returned in 4506 * onActivityResult() when the activity exits. 4507 * @param fillInIntent If non-null, this will be provided as the 4508 * intent parameter to {@link IntentSender#sendIntent}. 4509 * @param flagsMask Intent flags in the original IntentSender that you 4510 * would like to change. 4511 * @param flagsValues Desired values for any bits set in 4512 * <var>flagsMask</var> 4513 * @param extraFlags Always set to 0. 4514 */ 4515 public void startIntentSenderForResult(IntentSender intent, int requestCode, 4516 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4517 throws IntentSender.SendIntentException { 4518 startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, 4519 flagsValues, extraFlags, null); 4520 } 4521 4522 /** 4523 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 4524 * to use a IntentSender to describe the activity to be started. If 4525 * the IntentSender is for an activity, that activity will be started 4526 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 4527 * here; otherwise, its associated action will be executed (such as 4528 * sending a broadcast) as if you had called 4529 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 4530 * 4531 * @param intent The IntentSender to launch. 4532 * @param requestCode If >= 0, this code will be returned in 4533 * onActivityResult() when the activity exits. 4534 * @param fillInIntent If non-null, this will be provided as the 4535 * intent parameter to {@link IntentSender#sendIntent}. 4536 * @param flagsMask Intent flags in the original IntentSender that you 4537 * would like to change. 4538 * @param flagsValues Desired values for any bits set in 4539 * <var>flagsMask</var> 4540 * @param extraFlags Always set to 0. 4541 * @param options Additional options for how the Activity should be started. 4542 * See {@link android.content.Context#startActivity(Intent, Bundle) 4543 * Context.startActivity(Intent, Bundle)} for more details. If options 4544 * have also been supplied by the IntentSender, options given here will 4545 * override any that conflict with those given by the IntentSender. 4546 */ 4547 public void startIntentSenderForResult(IntentSender intent, int requestCode, 4548 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4549 Bundle options) throws IntentSender.SendIntentException { 4550 if (mParent == null) { 4551 startIntentSenderForResultInner(intent, mEmbeddedID, requestCode, fillInIntent, 4552 flagsMask, flagsValues, options); 4553 } else if (options != null) { 4554 mParent.startIntentSenderFromChild(this, intent, requestCode, 4555 fillInIntent, flagsMask, flagsValues, extraFlags, options); 4556 } else { 4557 // Note we want to go through this call for compatibility with 4558 // existing applications that may have overridden the method. 4559 mParent.startIntentSenderFromChild(this, intent, requestCode, 4560 fillInIntent, flagsMask, flagsValues, extraFlags); 4561 } 4562 } 4563 4564 private void startIntentSenderForResultInner(IntentSender intent, String who, int requestCode, 4565 Intent fillInIntent, int flagsMask, int flagsValues, 4566 Bundle options) 4567 throws IntentSender.SendIntentException { 4568 try { 4569 String resolvedType = null; 4570 if (fillInIntent != null) { 4571 fillInIntent.migrateExtraStreamToClipData(); 4572 fillInIntent.prepareToLeaveProcess(this); 4573 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 4574 } 4575 int result = ActivityManager.getService() 4576 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 4577 fillInIntent, resolvedType, mToken, who, 4578 requestCode, flagsMask, flagsValues, options); 4579 if (result == ActivityManager.START_CANCELED) { 4580 throw new IntentSender.SendIntentException(); 4581 } 4582 Instrumentation.checkStartActivityResult(result, null); 4583 } catch (RemoteException e) { 4584 } 4585 if (requestCode >= 0) { 4586 // If this start is requesting a result, we can avoid making 4587 // the activity visible until the result is received. Setting 4588 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4589 // activity hidden during this time, to avoid flickering. 4590 // This can only be done when a result is requested because 4591 // that guarantees we will get information back when the 4592 // activity is finished, no matter what happens to it. 4593 mStartedActivity = true; 4594 } 4595 } 4596 4597 /** 4598 * Same as {@link #startActivity(Intent, Bundle)} with no options 4599 * specified. 4600 * 4601 * @param intent The intent to start. 4602 * 4603 * @throws android.content.ActivityNotFoundException 4604 * 4605 * @see #startActivity(Intent, Bundle) 4606 * @see #startActivityForResult 4607 */ 4608 @Override 4609 public void startActivity(Intent intent) { 4610 this.startActivity(intent, null); 4611 } 4612 4613 /** 4614 * Launch a new activity. You will not receive any information about when 4615 * the activity exits. This implementation overrides the base version, 4616 * providing information about 4617 * the activity performing the launch. Because of this additional 4618 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4619 * required; if not specified, the new activity will be added to the 4620 * task of the caller. 4621 * 4622 * <p>This method throws {@link android.content.ActivityNotFoundException} 4623 * if there was no Activity found to run the given Intent. 4624 * 4625 * @param intent The intent to start. 4626 * @param options Additional options for how the Activity should be started. 4627 * See {@link android.content.Context#startActivity(Intent, Bundle) 4628 * Context.startActivity(Intent, Bundle)} for more details. 4629 * 4630 * @throws android.content.ActivityNotFoundException 4631 * 4632 * @see #startActivity(Intent) 4633 * @see #startActivityForResult 4634 */ 4635 @Override 4636 public void startActivity(Intent intent, @Nullable Bundle options) { 4637 if (options != null) { 4638 startActivityForResult(intent, -1, options); 4639 } else { 4640 // Note we want to go through this call for compatibility with 4641 // applications that may have overridden the method. 4642 startActivityForResult(intent, -1); 4643 } 4644 } 4645 4646 /** 4647 * Same as {@link #startActivities(Intent[], Bundle)} with no options 4648 * specified. 4649 * 4650 * @param intents The intents to start. 4651 * 4652 * @throws android.content.ActivityNotFoundException 4653 * 4654 * @see #startActivities(Intent[], Bundle) 4655 * @see #startActivityForResult 4656 */ 4657 @Override 4658 public void startActivities(Intent[] intents) { 4659 startActivities(intents, null); 4660 } 4661 4662 /** 4663 * Launch a new activity. You will not receive any information about when 4664 * the activity exits. This implementation overrides the base version, 4665 * providing information about 4666 * the activity performing the launch. Because of this additional 4667 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4668 * required; if not specified, the new activity will be added to the 4669 * task of the caller. 4670 * 4671 * <p>This method throws {@link android.content.ActivityNotFoundException} 4672 * if there was no Activity found to run the given Intent. 4673 * 4674 * @param intents The intents to start. 4675 * @param options Additional options for how the Activity should be started. 4676 * See {@link android.content.Context#startActivity(Intent, Bundle) 4677 * Context.startActivity(Intent, Bundle)} for more details. 4678 * 4679 * @throws android.content.ActivityNotFoundException 4680 * 4681 * @see #startActivities(Intent[]) 4682 * @see #startActivityForResult 4683 */ 4684 @Override 4685 public void startActivities(Intent[] intents, @Nullable Bundle options) { 4686 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 4687 mToken, this, intents, options); 4688 } 4689 4690 /** 4691 * Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 4692 * with no options. 4693 * 4694 * @param intent The IntentSender to launch. 4695 * @param fillInIntent If non-null, this will be provided as the 4696 * intent parameter to {@link IntentSender#sendIntent}. 4697 * @param flagsMask Intent flags in the original IntentSender that you 4698 * would like to change. 4699 * @param flagsValues Desired values for any bits set in 4700 * <var>flagsMask</var> 4701 * @param extraFlags Always set to 0. 4702 */ 4703 public void startIntentSender(IntentSender intent, 4704 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4705 throws IntentSender.SendIntentException { 4706 startIntentSender(intent, fillInIntent, flagsMask, flagsValues, 4707 extraFlags, null); 4708 } 4709 4710 /** 4711 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 4712 * to start; see 4713 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)} 4714 * for more information. 4715 * 4716 * @param intent The IntentSender to launch. 4717 * @param fillInIntent If non-null, this will be provided as the 4718 * intent parameter to {@link IntentSender#sendIntent}. 4719 * @param flagsMask Intent flags in the original IntentSender that you 4720 * would like to change. 4721 * @param flagsValues Desired values for any bits set in 4722 * <var>flagsMask</var> 4723 * @param extraFlags Always set to 0. 4724 * @param options Additional options for how the Activity should be started. 4725 * See {@link android.content.Context#startActivity(Intent, Bundle) 4726 * Context.startActivity(Intent, Bundle)} for more details. If options 4727 * have also been supplied by the IntentSender, options given here will 4728 * override any that conflict with those given by the IntentSender. 4729 */ 4730 public void startIntentSender(IntentSender intent, 4731 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4732 Bundle options) throws IntentSender.SendIntentException { 4733 if (options != null) { 4734 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4735 flagsValues, extraFlags, options); 4736 } else { 4737 // Note we want to go through this call for compatibility with 4738 // applications that may have overridden the method. 4739 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4740 flagsValues, extraFlags); 4741 } 4742 } 4743 4744 /** 4745 * Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)} 4746 * with no options. 4747 * 4748 * @param intent The intent to start. 4749 * @param requestCode If >= 0, this code will be returned in 4750 * onActivityResult() when the activity exits, as described in 4751 * {@link #startActivityForResult}. 4752 * 4753 * @return If a new activity was launched then true is returned; otherwise 4754 * false is returned and you must handle the Intent yourself. 4755 * 4756 * @see #startActivity 4757 * @see #startActivityForResult 4758 */ 4759 public boolean startActivityIfNeeded(@RequiresPermission @NonNull Intent intent, 4760 int requestCode) { 4761 return startActivityIfNeeded(intent, requestCode, null); 4762 } 4763 4764 /** 4765 * A special variation to launch an activity only if a new activity 4766 * instance is needed to handle the given Intent. In other words, this is 4767 * just like {@link #startActivityForResult(Intent, int)} except: if you are 4768 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 4769 * singleTask or singleTop 4770 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 4771 * and the activity 4772 * that handles <var>intent</var> is the same as your currently running 4773 * activity, then a new instance is not needed. In this case, instead of 4774 * the normal behavior of calling {@link #onNewIntent} this function will 4775 * return and you can handle the Intent yourself. 4776 * 4777 * <p>This function can only be called from a top-level activity; if it is 4778 * called from a child activity, a runtime exception will be thrown. 4779 * 4780 * @param intent The intent to start. 4781 * @param requestCode If >= 0, this code will be returned in 4782 * onActivityResult() when the activity exits, as described in 4783 * {@link #startActivityForResult}. 4784 * @param options Additional options for how the Activity should be started. 4785 * See {@link android.content.Context#startActivity(Intent, Bundle) 4786 * Context.startActivity(Intent, Bundle)} for more details. 4787 * 4788 * @return If a new activity was launched then true is returned; otherwise 4789 * false is returned and you must handle the Intent yourself. 4790 * 4791 * @see #startActivity 4792 * @see #startActivityForResult 4793 */ 4794 public boolean startActivityIfNeeded(@RequiresPermission @NonNull Intent intent, 4795 int requestCode, @Nullable Bundle options) { 4796 if (mParent == null) { 4797 int result = ActivityManager.START_RETURN_INTENT_TO_CALLER; 4798 try { 4799 Uri referrer = onProvideReferrer(); 4800 if (referrer != null) { 4801 intent.putExtra(Intent.EXTRA_REFERRER, referrer); 4802 } 4803 intent.migrateExtraStreamToClipData(); 4804 intent.prepareToLeaveProcess(this); 4805 result = ActivityManager.getService() 4806 .startActivity(mMainThread.getApplicationThread(), getBasePackageName(), 4807 intent, intent.resolveTypeIfNeeded(getContentResolver()), mToken, 4808 mEmbeddedID, requestCode, ActivityManager.START_FLAG_ONLY_IF_NEEDED, 4809 null, options); 4810 } catch (RemoteException e) { 4811 // Empty 4812 } 4813 4814 Instrumentation.checkStartActivityResult(result, intent); 4815 4816 if (requestCode >= 0) { 4817 // If this start is requesting a result, we can avoid making 4818 // the activity visible until the result is received. Setting 4819 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4820 // activity hidden during this time, to avoid flickering. 4821 // This can only be done when a result is requested because 4822 // that guarantees we will get information back when the 4823 // activity is finished, no matter what happens to it. 4824 mStartedActivity = true; 4825 } 4826 return result != ActivityManager.START_RETURN_INTENT_TO_CALLER; 4827 } 4828 4829 throw new UnsupportedOperationException( 4830 "startActivityIfNeeded can only be called from a top-level activity"); 4831 } 4832 4833 /** 4834 * Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with 4835 * no options. 4836 * 4837 * @param intent The intent to dispatch to the next activity. For 4838 * correct behavior, this must be the same as the Intent that started 4839 * your own activity; the only changes you can make are to the extras 4840 * inside of it. 4841 * 4842 * @return Returns a boolean indicating whether there was another Activity 4843 * to start: true if there was a next activity to start, false if there 4844 * wasn't. In general, if true is returned you will then want to call 4845 * finish() on yourself. 4846 */ 4847 public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent) { 4848 return startNextMatchingActivity(intent, null); 4849 } 4850 4851 /** 4852 * Special version of starting an activity, for use when you are replacing 4853 * other activity components. You can use this to hand the Intent off 4854 * to the next Activity that can handle it. You typically call this in 4855 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 4856 * 4857 * @param intent The intent to dispatch to the next activity. For 4858 * correct behavior, this must be the same as the Intent that started 4859 * your own activity; the only changes you can make are to the extras 4860 * inside of it. 4861 * @param options Additional options for how the Activity should be started. 4862 * See {@link android.content.Context#startActivity(Intent, Bundle) 4863 * Context.startActivity(Intent, Bundle)} for more details. 4864 * 4865 * @return Returns a boolean indicating whether there was another Activity 4866 * to start: true if there was a next activity to start, false if there 4867 * wasn't. In general, if true is returned you will then want to call 4868 * finish() on yourself. 4869 */ 4870 public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent, 4871 @Nullable Bundle options) { 4872 if (mParent == null) { 4873 try { 4874 intent.migrateExtraStreamToClipData(); 4875 intent.prepareToLeaveProcess(this); 4876 return ActivityManager.getService() 4877 .startNextMatchingActivity(mToken, intent, options); 4878 } catch (RemoteException e) { 4879 // Empty 4880 } 4881 return false; 4882 } 4883 4884 throw new UnsupportedOperationException( 4885 "startNextMatchingActivity can only be called from a top-level activity"); 4886 } 4887 4888 /** 4889 * Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)} 4890 * with no options. 4891 * 4892 * @param child The activity making the call. 4893 * @param intent The intent to start. 4894 * @param requestCode Reply request code. < 0 if reply is not requested. 4895 * 4896 * @throws android.content.ActivityNotFoundException 4897 * 4898 * @see #startActivity 4899 * @see #startActivityForResult 4900 */ 4901 public void startActivityFromChild(@NonNull Activity child, @RequiresPermission Intent intent, 4902 int requestCode) { 4903 startActivityFromChild(child, intent, requestCode, null); 4904 } 4905 4906 /** 4907 * This is called when a child activity of this one calls its 4908 * {@link #startActivity} or {@link #startActivityForResult} method. 4909 * 4910 * <p>This method throws {@link android.content.ActivityNotFoundException} 4911 * if there was no Activity found to run the given Intent. 4912 * 4913 * @param child The activity making the call. 4914 * @param intent The intent to start. 4915 * @param requestCode Reply request code. < 0 if reply is not requested. 4916 * @param options Additional options for how the Activity should be started. 4917 * See {@link android.content.Context#startActivity(Intent, Bundle) 4918 * Context.startActivity(Intent, Bundle)} for more details. 4919 * 4920 * @throws android.content.ActivityNotFoundException 4921 * 4922 * @see #startActivity 4923 * @see #startActivityForResult 4924 */ 4925 public void startActivityFromChild(@NonNull Activity child, @RequiresPermission Intent intent, 4926 int requestCode, @Nullable Bundle options) { 4927 options = transferSpringboardActivityOptions(options); 4928 Instrumentation.ActivityResult ar = 4929 mInstrumentation.execStartActivity( 4930 this, mMainThread.getApplicationThread(), mToken, child, 4931 intent, requestCode, options); 4932 if (ar != null) { 4933 mMainThread.sendActivityResult( 4934 mToken, child.mEmbeddedID, requestCode, 4935 ar.getResultCode(), ar.getResultData()); 4936 } 4937 cancelInputsAndStartExitTransition(options); 4938 } 4939 4940 /** 4941 * Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)} 4942 * with no options. 4943 * 4944 * @param fragment The fragment making the call. 4945 * @param intent The intent to start. 4946 * @param requestCode Reply request code. < 0 if reply is not requested. 4947 * 4948 * @throws android.content.ActivityNotFoundException 4949 * 4950 * @see Fragment#startActivity 4951 * @see Fragment#startActivityForResult 4952 */ 4953 public void startActivityFromFragment(@NonNull Fragment fragment, 4954 @RequiresPermission Intent intent, int requestCode) { 4955 startActivityFromFragment(fragment, intent, requestCode, null); 4956 } 4957 4958 /** 4959 * This is called when a Fragment in this activity calls its 4960 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 4961 * method. 4962 * 4963 * <p>This method throws {@link android.content.ActivityNotFoundException} 4964 * if there was no Activity found to run the given Intent. 4965 * 4966 * @param fragment The fragment making the call. 4967 * @param intent The intent to start. 4968 * @param requestCode Reply request code. < 0 if reply is not requested. 4969 * @param options Additional options for how the Activity should be started. 4970 * See {@link android.content.Context#startActivity(Intent, Bundle) 4971 * Context.startActivity(Intent, Bundle)} for more details. 4972 * 4973 * @throws android.content.ActivityNotFoundException 4974 * 4975 * @see Fragment#startActivity 4976 * @see Fragment#startActivityForResult 4977 */ 4978 public void startActivityFromFragment(@NonNull Fragment fragment, 4979 @RequiresPermission Intent intent, int requestCode, @Nullable Bundle options) { 4980 startActivityForResult(fragment.mWho, intent, requestCode, options); 4981 } 4982 4983 /** 4984 * @hide 4985 */ 4986 @Override 4987 public void startActivityForResult( 4988 String who, Intent intent, int requestCode, @Nullable Bundle options) { 4989 Uri referrer = onProvideReferrer(); 4990 if (referrer != null) { 4991 intent.putExtra(Intent.EXTRA_REFERRER, referrer); 4992 } 4993 options = transferSpringboardActivityOptions(options); 4994 Instrumentation.ActivityResult ar = 4995 mInstrumentation.execStartActivity( 4996 this, mMainThread.getApplicationThread(), mToken, who, 4997 intent, requestCode, options); 4998 if (ar != null) { 4999 mMainThread.sendActivityResult( 5000 mToken, who, requestCode, 5001 ar.getResultCode(), ar.getResultData()); 5002 } 5003 cancelInputsAndStartExitTransition(options); 5004 } 5005 5006 /** 5007 * @hide 5008 */ 5009 @Override 5010 public boolean canStartActivityForResult() { 5011 return true; 5012 } 5013 5014 /** 5015 * Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender, 5016 * int, Intent, int, int, int, Bundle)} with no options. 5017 */ 5018 public void startIntentSenderFromChild(Activity child, IntentSender intent, 5019 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 5020 int extraFlags) 5021 throws IntentSender.SendIntentException { 5022 startIntentSenderFromChild(child, intent, requestCode, fillInIntent, 5023 flagsMask, flagsValues, extraFlags, null); 5024 } 5025 5026 /** 5027 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 5028 * taking a IntentSender; see 5029 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 5030 * for more information. 5031 */ 5032 public void startIntentSenderFromChild(Activity child, IntentSender intent, 5033 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 5034 int extraFlags, @Nullable Bundle options) 5035 throws IntentSender.SendIntentException { 5036 startIntentSenderForResultInner(intent, child.mEmbeddedID, requestCode, fillInIntent, 5037 flagsMask, flagsValues, options); 5038 } 5039 5040 /** 5041 * Like {@link #startIntentSenderFromChild}, but taking a Fragment; see 5042 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 5043 * for more information. 5044 * 5045 * @hide 5046 */ 5047 public void startIntentSenderFromChildFragment(Fragment child, IntentSender intent, 5048 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 5049 int extraFlags, @Nullable Bundle options) 5050 throws IntentSender.SendIntentException { 5051 startIntentSenderForResultInner(intent, child.mWho, requestCode, fillInIntent, 5052 flagsMask, flagsValues, options); 5053 } 5054 5055 /** 5056 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 5057 * or {@link #finish} to specify an explicit transition animation to 5058 * perform next. 5059 * 5060 * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative 5061 * to using this with starting activities is to supply the desired animation 5062 * information through a {@link ActivityOptions} bundle to 5063 * {@link #startActivity(Intent, Bundle)} or a related function. This allows 5064 * you to specify a custom animation even when starting an activity from 5065 * outside the context of the current top activity. 5066 * 5067 * @param enterAnim A resource ID of the animation resource to use for 5068 * the incoming activity. Use 0 for no animation. 5069 * @param exitAnim A resource ID of the animation resource to use for 5070 * the outgoing activity. Use 0 for no animation. 5071 */ 5072 public void overridePendingTransition(int enterAnim, int exitAnim) { 5073 try { 5074 ActivityManager.getService().overridePendingTransition( 5075 mToken, getPackageName(), enterAnim, exitAnim); 5076 } catch (RemoteException e) { 5077 } 5078 } 5079 5080 /** 5081 * Call this to set the result that your activity will return to its 5082 * caller. 5083 * 5084 * @param resultCode The result code to propagate back to the originating 5085 * activity, often RESULT_CANCELED or RESULT_OK 5086 * 5087 * @see #RESULT_CANCELED 5088 * @see #RESULT_OK 5089 * @see #RESULT_FIRST_USER 5090 * @see #setResult(int, Intent) 5091 */ 5092 public final void setResult(int resultCode) { 5093 synchronized (this) { 5094 mResultCode = resultCode; 5095 mResultData = null; 5096 } 5097 } 5098 5099 /** 5100 * Call this to set the result that your activity will return to its 5101 * caller. 5102 * 5103 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 5104 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 5105 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 5106 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 5107 * Activity receiving the result access to the specific URIs in the Intent. 5108 * Access will remain until the Activity has finished (it will remain across the hosting 5109 * process being killed and other temporary destruction) and will be added 5110 * to any existing set of URI permissions it already holds. 5111 * 5112 * @param resultCode The result code to propagate back to the originating 5113 * activity, often RESULT_CANCELED or RESULT_OK 5114 * @param data The data to propagate back to the originating activity. 5115 * 5116 * @see #RESULT_CANCELED 5117 * @see #RESULT_OK 5118 * @see #RESULT_FIRST_USER 5119 * @see #setResult(int) 5120 */ 5121 public final void setResult(int resultCode, Intent data) { 5122 synchronized (this) { 5123 mResultCode = resultCode; 5124 mResultData = data; 5125 } 5126 } 5127 5128 /** 5129 * Return information about who launched this activity. If the launching Intent 5130 * contains an {@link android.content.Intent#EXTRA_REFERRER Intent.EXTRA_REFERRER}, 5131 * that will be returned as-is; otherwise, if known, an 5132 * {@link Intent#URI_ANDROID_APP_SCHEME android-app:} referrer URI containing the 5133 * package name that started the Intent will be returned. This may return null if no 5134 * referrer can be identified -- it is neither explicitly specified, nor is it known which 5135 * application package was involved. 5136 * 5137 * <p>If called while inside the handling of {@link #onNewIntent}, this function will 5138 * return the referrer that submitted that new intent to the activity. Otherwise, it 5139 * always returns the referrer of the original Intent.</p> 5140 * 5141 * <p>Note that this is <em>not</em> a security feature -- you can not trust the 5142 * referrer information, applications can spoof it.</p> 5143 */ 5144 @Nullable 5145 public Uri getReferrer() { 5146 Intent intent = getIntent(); 5147 try { 5148 Uri referrer = intent.getParcelableExtra(Intent.EXTRA_REFERRER); 5149 if (referrer != null) { 5150 return referrer; 5151 } 5152 String referrerName = intent.getStringExtra(Intent.EXTRA_REFERRER_NAME); 5153 if (referrerName != null) { 5154 return Uri.parse(referrerName); 5155 } 5156 } catch (BadParcelableException e) { 5157 Log.w(TAG, "Cannot read referrer from intent;" 5158 + " intent extras contain unknown custom Parcelable objects"); 5159 } 5160 if (mReferrer != null) { 5161 return new Uri.Builder().scheme("android-app").authority(mReferrer).build(); 5162 } 5163 return null; 5164 } 5165 5166 /** 5167 * Override to generate the desired referrer for the content currently being shown 5168 * by the app. The default implementation returns null, meaning the referrer will simply 5169 * be the android-app: of the package name of this activity. Return a non-null Uri to 5170 * have that supplied as the {@link Intent#EXTRA_REFERRER} of any activities started from it. 5171 */ 5172 public Uri onProvideReferrer() { 5173 return null; 5174 } 5175 5176 /** 5177 * Return the name of the package that invoked this activity. This is who 5178 * the data in {@link #setResult setResult()} will be sent to. You can 5179 * use this information to validate that the recipient is allowed to 5180 * receive the data. 5181 * 5182 * <p class="note">Note: if the calling activity is not expecting a result (that is it 5183 * did not use the {@link #startActivityForResult} 5184 * form that includes a request code), then the calling package will be 5185 * null.</p> 5186 * 5187 * <p class="note">Note: prior to {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, 5188 * the result from this method was unstable. If the process hosting the calling 5189 * package was no longer running, it would return null instead of the proper package 5190 * name. You can use {@link #getCallingActivity()} and retrieve the package name 5191 * from that instead.</p> 5192 * 5193 * @return The package of the activity that will receive your 5194 * reply, or null if none. 5195 */ 5196 @Nullable 5197 public String getCallingPackage() { 5198 try { 5199 return ActivityManager.getService().getCallingPackage(mToken); 5200 } catch (RemoteException e) { 5201 return null; 5202 } 5203 } 5204 5205 /** 5206 * Return the name of the activity that invoked this activity. This is 5207 * who the data in {@link #setResult setResult()} will be sent to. You 5208 * can use this information to validate that the recipient is allowed to 5209 * receive the data. 5210 * 5211 * <p class="note">Note: if the calling activity is not expecting a result (that is it 5212 * did not use the {@link #startActivityForResult} 5213 * form that includes a request code), then the calling package will be 5214 * null. 5215 * 5216 * @return The ComponentName of the activity that will receive your 5217 * reply, or null if none. 5218 */ 5219 @Nullable 5220 public ComponentName getCallingActivity() { 5221 try { 5222 return ActivityManager.getService().getCallingActivity(mToken); 5223 } catch (RemoteException e) { 5224 return null; 5225 } 5226 } 5227 5228 /** 5229 * Control whether this activity's main window is visible. This is intended 5230 * only for the special case of an activity that is not going to show a 5231 * UI itself, but can't just finish prior to onResume() because it needs 5232 * to wait for a service binding or such. Setting this to false allows 5233 * you to prevent your UI from being shown during that time. 5234 * 5235 * <p>The default value for this is taken from the 5236 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 5237 */ 5238 public void setVisible(boolean visible) { 5239 if (mVisibleFromClient != visible) { 5240 mVisibleFromClient = visible; 5241 if (mVisibleFromServer) { 5242 if (visible) makeVisible(); 5243 else mDecor.setVisibility(View.INVISIBLE); 5244 } 5245 } 5246 } 5247 5248 void makeVisible() { 5249 if (!mWindowAdded) { 5250 ViewManager wm = getWindowManager(); 5251 wm.addView(mDecor, getWindow().getAttributes()); 5252 mWindowAdded = true; 5253 } 5254 mDecor.setVisibility(View.VISIBLE); 5255 } 5256 5257 /** 5258 * Check to see whether this activity is in the process of finishing, 5259 * either because you called {@link #finish} on it or someone else 5260 * has requested that it finished. This is often used in 5261 * {@link #onPause} to determine whether the activity is simply pausing or 5262 * completely finishing. 5263 * 5264 * @return If the activity is finishing, returns true; else returns false. 5265 * 5266 * @see #finish 5267 */ 5268 public boolean isFinishing() { 5269 return mFinished; 5270 } 5271 5272 /** 5273 * Returns true if the final {@link #onDestroy()} call has been made 5274 * on the Activity, so this instance is now dead. 5275 */ 5276 public boolean isDestroyed() { 5277 return mDestroyed; 5278 } 5279 5280 /** 5281 * Check to see whether this activity is in the process of being destroyed in order to be 5282 * recreated with a new configuration. This is often used in 5283 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 5284 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 5285 * 5286 * @return If the activity is being torn down in order to be recreated with a new configuration, 5287 * returns true; else returns false. 5288 */ 5289 public boolean isChangingConfigurations() { 5290 return mChangingConfigurations; 5291 } 5292 5293 /** 5294 * Cause this Activity to be recreated with a new instance. This results 5295 * in essentially the same flow as when the Activity is created due to 5296 * a configuration change -- the current instance will go through its 5297 * lifecycle to {@link #onDestroy} and a new instance then created after it. 5298 */ 5299 public void recreate() { 5300 if (mParent != null) { 5301 throw new IllegalStateException("Can only be called on top-level activity"); 5302 } 5303 if (Looper.myLooper() != mMainThread.getLooper()) { 5304 throw new IllegalStateException("Must be called from main thread"); 5305 } 5306 try { 5307 ActivityManager.getService().requestActivityRelaunch(mToken); 5308 } catch (RemoteException e) { 5309 } 5310 } 5311 5312 /** 5313 * Finishes the current activity and specifies whether to remove the task associated with this 5314 * activity. 5315 */ 5316 private void finish(int finishTask) { 5317 if (mParent == null) { 5318 int resultCode; 5319 Intent resultData; 5320 synchronized (this) { 5321 resultCode = mResultCode; 5322 resultData = mResultData; 5323 } 5324 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 5325 try { 5326 if (resultData != null) { 5327 resultData.prepareToLeaveProcess(this); 5328 } 5329 if (ActivityManager.getService() 5330 .finishActivity(mToken, resultCode, resultData, finishTask)) { 5331 mFinished = true; 5332 } 5333 } catch (RemoteException e) { 5334 // Empty 5335 } 5336 } else { 5337 mParent.finishFromChild(this); 5338 } 5339 } 5340 5341 /** 5342 * Call this when your activity is done and should be closed. The 5343 * ActivityResult is propagated back to whoever launched you via 5344 * onActivityResult(). 5345 */ 5346 public void finish() { 5347 finish(DONT_FINISH_TASK_WITH_ACTIVITY); 5348 } 5349 5350 /** 5351 * Finish this activity as well as all activities immediately below it 5352 * in the current task that have the same affinity. This is typically 5353 * used when an application can be launched on to another task (such as 5354 * from an ACTION_VIEW of a content type it understands) and the user 5355 * has used the up navigation to switch out of the current task and in 5356 * to its own task. In this case, if the user has navigated down into 5357 * any other activities of the second application, all of those should 5358 * be removed from the original task as part of the task switch. 5359 * 5360 * <p>Note that this finish does <em>not</em> allow you to deliver results 5361 * to the previous activity, and an exception will be thrown if you are trying 5362 * to do so.</p> 5363 */ 5364 public void finishAffinity() { 5365 if (mParent != null) { 5366 throw new IllegalStateException("Can not be called from an embedded activity"); 5367 } 5368 if (mResultCode != RESULT_CANCELED || mResultData != null) { 5369 throw new IllegalStateException("Can not be called to deliver a result"); 5370 } 5371 try { 5372 if (ActivityManager.getService().finishActivityAffinity(mToken)) { 5373 mFinished = true; 5374 } 5375 } catch (RemoteException e) { 5376 // Empty 5377 } 5378 } 5379 5380 /** 5381 * This is called when a child activity of this one calls its 5382 * {@link #finish} method. The default implementation simply calls 5383 * finish() on this activity (the parent), finishing the entire group. 5384 * 5385 * @param child The activity making the call. 5386 * 5387 * @see #finish 5388 */ 5389 public void finishFromChild(Activity child) { 5390 finish(); 5391 } 5392 5393 /** 5394 * Reverses the Activity Scene entry Transition and triggers the calling Activity 5395 * to reverse its exit Transition. When the exit Transition completes, 5396 * {@link #finish()} is called. If no entry Transition was used, finish() is called 5397 * immediately and the Activity exit Transition is run. 5398 * @see android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, android.util.Pair[]) 5399 */ 5400 public void finishAfterTransition() { 5401 if (!mActivityTransitionState.startExitBackTransition(this)) { 5402 finish(); 5403 } 5404 } 5405 5406 /** 5407 * Force finish another activity that you had previously started with 5408 * {@link #startActivityForResult}. 5409 * 5410 * @param requestCode The request code of the activity that you had 5411 * given to startActivityForResult(). If there are multiple 5412 * activities started with this request code, they 5413 * will all be finished. 5414 */ 5415 public void finishActivity(int requestCode) { 5416 if (mParent == null) { 5417 try { 5418 ActivityManager.getService() 5419 .finishSubActivity(mToken, mEmbeddedID, requestCode); 5420 } catch (RemoteException e) { 5421 // Empty 5422 } 5423 } else { 5424 mParent.finishActivityFromChild(this, requestCode); 5425 } 5426 } 5427 5428 /** 5429 * This is called when a child activity of this one calls its 5430 * finishActivity(). 5431 * 5432 * @param child The activity making the call. 5433 * @param requestCode Request code that had been used to start the 5434 * activity. 5435 */ 5436 public void finishActivityFromChild(@NonNull Activity child, int requestCode) { 5437 try { 5438 ActivityManager.getService() 5439 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 5440 } catch (RemoteException e) { 5441 // Empty 5442 } 5443 } 5444 5445 /** 5446 * Call this when your activity is done and should be closed and the task should be completely 5447 * removed as a part of finishing the root activity of the task. 5448 */ 5449 public void finishAndRemoveTask() { 5450 finish(FINISH_TASK_WITH_ROOT_ACTIVITY); 5451 } 5452 5453 /** 5454 * Ask that the local app instance of this activity be released to free up its memory. 5455 * This is asking for the activity to be destroyed, but does <b>not</b> finish the activity -- 5456 * a new instance of the activity will later be re-created if needed due to the user 5457 * navigating back to it. 5458 * 5459 * @return Returns true if the activity was in a state that it has started the process 5460 * of destroying its current instance; returns false if for any reason this could not 5461 * be done: it is currently visible to the user, it is already being destroyed, it is 5462 * being finished, it hasn't yet saved its state, etc. 5463 */ 5464 public boolean releaseInstance() { 5465 try { 5466 return ActivityManager.getService().releaseActivityInstance(mToken); 5467 } catch (RemoteException e) { 5468 // Empty 5469 } 5470 return false; 5471 } 5472 5473 /** 5474 * Called when an activity you launched exits, giving you the requestCode 5475 * you started it with, the resultCode it returned, and any additional 5476 * data from it. The <var>resultCode</var> will be 5477 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 5478 * didn't return any result, or crashed during its operation. 5479 * 5480 * <p>You will receive this call immediately before onResume() when your 5481 * activity is re-starting. 5482 * 5483 * <p>This method is never invoked if your activity sets 5484 * {@link android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 5485 * <code>true</code>. 5486 * 5487 * @param requestCode The integer request code originally supplied to 5488 * startActivityForResult(), allowing you to identify who this 5489 * result came from. 5490 * @param resultCode The integer result code returned by the child activity 5491 * through its setResult(). 5492 * @param data An Intent, which can return result data to the caller 5493 * (various data can be attached to Intent "extras"). 5494 * 5495 * @see #startActivityForResult 5496 * @see #createPendingResult 5497 * @see #setResult(int) 5498 */ 5499 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 5500 } 5501 5502 /** 5503 * Called when an activity you launched with an activity transition exposes this 5504 * Activity through a returning activity transition, giving you the resultCode 5505 * and any additional data from it. This method will only be called if the activity 5506 * set a result code other than {@link #RESULT_CANCELED} and it supports activity 5507 * transitions with {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 5508 * 5509 * <p>The purpose of this function is to let the called Activity send a hint about 5510 * its state so that this underlying Activity can prepare to be exposed. A call to 5511 * this method does not guarantee that the called Activity has or will be exiting soon. 5512 * It only indicates that it will expose this Activity's Window and it has 5513 * some data to pass to prepare it.</p> 5514 * 5515 * @param resultCode The integer result code returned by the child activity 5516 * through its setResult(). 5517 * @param data An Intent, which can return result data to the caller 5518 * (various data can be attached to Intent "extras"). 5519 */ 5520 public void onActivityReenter(int resultCode, Intent data) { 5521 } 5522 5523 /** 5524 * Create a new PendingIntent object which you can hand to others 5525 * for them to use to send result data back to your 5526 * {@link #onActivityResult} callback. The created object will be either 5527 * one-shot (becoming invalid after a result is sent back) or multiple 5528 * (allowing any number of results to be sent through it). 5529 * 5530 * @param requestCode Private request code for the sender that will be 5531 * associated with the result data when it is returned. The sender can not 5532 * modify this value, allowing you to identify incoming results. 5533 * @param data Default data to supply in the result, which may be modified 5534 * by the sender. 5535 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 5536 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 5537 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 5538 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 5539 * or any of the flags as supported by 5540 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 5541 * of the intent that can be supplied when the actual send happens. 5542 * 5543 * @return Returns an existing or new PendingIntent matching the given 5544 * parameters. May return null only if 5545 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 5546 * supplied. 5547 * 5548 * @see PendingIntent 5549 */ 5550 public PendingIntent createPendingResult(int requestCode, @NonNull Intent data, 5551 @PendingIntent.Flags int flags) { 5552 String packageName = getPackageName(); 5553 try { 5554 data.prepareToLeaveProcess(this); 5555 IIntentSender target = 5556 ActivityManager.getService().getIntentSender( 5557 ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 5558 mParent == null ? mToken : mParent.mToken, 5559 mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null, 5560 UserHandle.myUserId()); 5561 return target != null ? new PendingIntent(target) : null; 5562 } catch (RemoteException e) { 5563 // Empty 5564 } 5565 return null; 5566 } 5567 5568 /** 5569 * Change the desired orientation of this activity. If the activity 5570 * is currently in the foreground or otherwise impacting the screen 5571 * orientation, the screen will immediately be changed (possibly causing 5572 * the activity to be restarted). Otherwise, this will be used the next 5573 * time the activity is visible. 5574 * 5575 * @param requestedOrientation An orientation constant as used in 5576 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 5577 */ 5578 public void setRequestedOrientation(@ActivityInfo.ScreenOrientation int requestedOrientation) { 5579 if (mParent == null) { 5580 try { 5581 ActivityManager.getService().setRequestedOrientation( 5582 mToken, requestedOrientation); 5583 } catch (RemoteException e) { 5584 // Empty 5585 } 5586 } else { 5587 mParent.setRequestedOrientation(requestedOrientation); 5588 } 5589 } 5590 5591 /** 5592 * Return the current requested orientation of the activity. This will 5593 * either be the orientation requested in its component's manifest, or 5594 * the last requested orientation given to 5595 * {@link #setRequestedOrientation(int)}. 5596 * 5597 * @return Returns an orientation constant as used in 5598 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 5599 */ 5600 @ActivityInfo.ScreenOrientation 5601 public int getRequestedOrientation() { 5602 if (mParent == null) { 5603 try { 5604 return ActivityManager.getService() 5605 .getRequestedOrientation(mToken); 5606 } catch (RemoteException e) { 5607 // Empty 5608 } 5609 } else { 5610 return mParent.getRequestedOrientation(); 5611 } 5612 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 5613 } 5614 5615 /** 5616 * Return the identifier of the task this activity is in. This identifier 5617 * will remain the same for the lifetime of the activity. 5618 * 5619 * @return Task identifier, an opaque integer. 5620 */ 5621 public int getTaskId() { 5622 try { 5623 return ActivityManager.getService() 5624 .getTaskForActivity(mToken, false); 5625 } catch (RemoteException e) { 5626 return -1; 5627 } 5628 } 5629 5630 /** 5631 * Return whether this activity is the root of a task. The root is the 5632 * first activity in a task. 5633 * 5634 * @return True if this is the root activity, else false. 5635 */ 5636 public boolean isTaskRoot() { 5637 try { 5638 return ActivityManager.getService().getTaskForActivity(mToken, true) >= 0; 5639 } catch (RemoteException e) { 5640 return false; 5641 } 5642 } 5643 5644 /** 5645 * Move the task containing this activity to the back of the activity 5646 * stack. The activity's order within the task is unchanged. 5647 * 5648 * @param nonRoot If false then this only works if the activity is the root 5649 * of a task; if true it will work for any activity in 5650 * a task. 5651 * 5652 * @return If the task was moved (or it was already at the 5653 * back) true is returned, else false. 5654 */ 5655 public boolean moveTaskToBack(boolean nonRoot) { 5656 try { 5657 return ActivityManager.getService().moveActivityTaskToBack( 5658 mToken, nonRoot); 5659 } catch (RemoteException e) { 5660 // Empty 5661 } 5662 return false; 5663 } 5664 5665 /** 5666 * Returns class name for this activity with the package prefix removed. 5667 * This is the default name used to read and write settings. 5668 * 5669 * @return The local class name. 5670 */ 5671 @NonNull 5672 public String getLocalClassName() { 5673 final String pkg = getPackageName(); 5674 final String cls = mComponent.getClassName(); 5675 int packageLen = pkg.length(); 5676 if (!cls.startsWith(pkg) || cls.length() <= packageLen 5677 || cls.charAt(packageLen) != '.') { 5678 return cls; 5679 } 5680 return cls.substring(packageLen+1); 5681 } 5682 5683 /** 5684 * Returns complete component name of this activity. 5685 * 5686 * @return Returns the complete component name for this activity 5687 */ 5688 public ComponentName getComponentName() 5689 { 5690 return mComponent; 5691 } 5692 5693 /** 5694 * Retrieve a {@link SharedPreferences} object for accessing preferences 5695 * that are private to this activity. This simply calls the underlying 5696 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 5697 * class name as the preferences name. 5698 * 5699 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 5700 * operation. 5701 * 5702 * @return Returns the single SharedPreferences instance that can be used 5703 * to retrieve and modify the preference values. 5704 */ 5705 public SharedPreferences getPreferences(int mode) { 5706 return getSharedPreferences(getLocalClassName(), mode); 5707 } 5708 5709 private void ensureSearchManager() { 5710 if (mSearchManager != null) { 5711 return; 5712 } 5713 5714 try { 5715 mSearchManager = new SearchManager(this, null); 5716 } catch (ServiceNotFoundException e) { 5717 throw new IllegalStateException(e); 5718 } 5719 } 5720 5721 @Override 5722 public Object getSystemService(@ServiceName @NonNull String name) { 5723 if (getBaseContext() == null) { 5724 throw new IllegalStateException( 5725 "System services not available to Activities before onCreate()"); 5726 } 5727 5728 if (WINDOW_SERVICE.equals(name)) { 5729 return mWindowManager; 5730 } else if (SEARCH_SERVICE.equals(name)) { 5731 ensureSearchManager(); 5732 return mSearchManager; 5733 } 5734 return super.getSystemService(name); 5735 } 5736 5737 /** 5738 * Change the title associated with this activity. If this is a 5739 * top-level activity, the title for its window will change. If it 5740 * is an embedded activity, the parent can do whatever it wants 5741 * with it. 5742 */ 5743 public void setTitle(CharSequence title) { 5744 mTitle = title; 5745 onTitleChanged(title, mTitleColor); 5746 5747 if (mParent != null) { 5748 mParent.onChildTitleChanged(this, title); 5749 } 5750 } 5751 5752 /** 5753 * Change the title associated with this activity. If this is a 5754 * top-level activity, the title for its window will change. If it 5755 * is an embedded activity, the parent can do whatever it wants 5756 * with it. 5757 */ 5758 public void setTitle(int titleId) { 5759 setTitle(getText(titleId)); 5760 } 5761 5762 /** 5763 * Change the color of the title associated with this activity. 5764 * <p> 5765 * This method is deprecated starting in API Level 11 and replaced by action 5766 * bar styles. For information on styling the Action Bar, read the <a 5767 * href="{@docRoot} guide/topics/ui/actionbar.html">Action Bar</a> developer 5768 * guide. 5769 * 5770 * @deprecated Use action bar styles instead. 5771 */ 5772 @Deprecated 5773 public void setTitleColor(int textColor) { 5774 mTitleColor = textColor; 5775 onTitleChanged(mTitle, textColor); 5776 } 5777 5778 public final CharSequence getTitle() { 5779 return mTitle; 5780 } 5781 5782 public final int getTitleColor() { 5783 return mTitleColor; 5784 } 5785 5786 protected void onTitleChanged(CharSequence title, int color) { 5787 if (mTitleReady) { 5788 final Window win = getWindow(); 5789 if (win != null) { 5790 win.setTitle(title); 5791 if (color != 0) { 5792 win.setTitleColor(color); 5793 } 5794 } 5795 if (mActionBar != null) { 5796 mActionBar.setWindowTitle(title); 5797 } 5798 } 5799 } 5800 5801 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 5802 } 5803 5804 /** 5805 * Sets information describing the task with this activity for presentation inside the Recents 5806 * System UI. When {@link ActivityManager#getRecentTasks} is called, the activities of each task 5807 * are traversed in order from the topmost activity to the bottommost. The traversal continues 5808 * for each property until a suitable value is found. For each task the taskDescription will be 5809 * returned in {@link android.app.ActivityManager.TaskDescription}. 5810 * 5811 * @see ActivityManager#getRecentTasks 5812 * @see android.app.ActivityManager.TaskDescription 5813 * 5814 * @param taskDescription The TaskDescription properties that describe the task with this activity 5815 */ 5816 public void setTaskDescription(ActivityManager.TaskDescription taskDescription) { 5817 if (mTaskDescription != taskDescription) { 5818 mTaskDescription.copyFrom(taskDescription); 5819 // Scale the icon down to something reasonable if it is provided 5820 if (taskDescription.getIconFilename() == null && taskDescription.getIcon() != null) { 5821 final int size = ActivityManager.getLauncherLargeIconSizeInner(this); 5822 final Bitmap icon = Bitmap.createScaledBitmap(taskDescription.getIcon(), size, size, 5823 true); 5824 mTaskDescription.setIcon(icon); 5825 } 5826 } 5827 try { 5828 ActivityManager.getService().setTaskDescription(mToken, mTaskDescription); 5829 } catch (RemoteException e) { 5830 } 5831 } 5832 5833 /** 5834 * Sets the visibility of the progress bar in the title. 5835 * <p> 5836 * In order for the progress bar to be shown, the feature must be requested 5837 * via {@link #requestWindowFeature(int)}. 5838 * 5839 * @param visible Whether to show the progress bars in the title. 5840 * @deprecated No longer supported starting in API 21. 5841 */ 5842 @Deprecated 5843 public final void setProgressBarVisibility(boolean visible) { 5844 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 5845 Window.PROGRESS_VISIBILITY_OFF); 5846 } 5847 5848 /** 5849 * Sets the visibility of the indeterminate progress bar in the title. 5850 * <p> 5851 * In order for the progress bar to be shown, the feature must be requested 5852 * via {@link #requestWindowFeature(int)}. 5853 * 5854 * @param visible Whether to show the progress bars in the title. 5855 * @deprecated No longer supported starting in API 21. 5856 */ 5857 @Deprecated 5858 public final void setProgressBarIndeterminateVisibility(boolean visible) { 5859 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 5860 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 5861 } 5862 5863 /** 5864 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 5865 * is always indeterminate). 5866 * <p> 5867 * In order for the progress bar to be shown, the feature must be requested 5868 * via {@link #requestWindowFeature(int)}. 5869 * 5870 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 5871 * @deprecated No longer supported starting in API 21. 5872 */ 5873 @Deprecated 5874 public final void setProgressBarIndeterminate(boolean indeterminate) { 5875 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 5876 indeterminate ? Window.PROGRESS_INDETERMINATE_ON 5877 : Window.PROGRESS_INDETERMINATE_OFF); 5878 } 5879 5880 /** 5881 * Sets the progress for the progress bars in the title. 5882 * <p> 5883 * In order for the progress bar to be shown, the feature must be requested 5884 * via {@link #requestWindowFeature(int)}. 5885 * 5886 * @param progress The progress for the progress bar. Valid ranges are from 5887 * 0 to 10000 (both inclusive). If 10000 is given, the progress 5888 * bar will be completely filled and will fade out. 5889 * @deprecated No longer supported starting in API 21. 5890 */ 5891 @Deprecated 5892 public final void setProgress(int progress) { 5893 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 5894 } 5895 5896 /** 5897 * Sets the secondary progress for the progress bar in the title. This 5898 * progress is drawn between the primary progress (set via 5899 * {@link #setProgress(int)} and the background. It can be ideal for media 5900 * scenarios such as showing the buffering progress while the default 5901 * progress shows the play progress. 5902 * <p> 5903 * In order for the progress bar to be shown, the feature must be requested 5904 * via {@link #requestWindowFeature(int)}. 5905 * 5906 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 5907 * 0 to 10000 (both inclusive). 5908 * @deprecated No longer supported starting in API 21. 5909 */ 5910 @Deprecated 5911 public final void setSecondaryProgress(int secondaryProgress) { 5912 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 5913 secondaryProgress + Window.PROGRESS_SECONDARY_START); 5914 } 5915 5916 /** 5917 * Suggests an audio stream whose volume should be changed by the hardware 5918 * volume controls. 5919 * <p> 5920 * The suggested audio stream will be tied to the window of this Activity. 5921 * Volume requests which are received while the Activity is in the 5922 * foreground will affect this stream. 5923 * <p> 5924 * It is not guaranteed that the hardware volume controls will always change 5925 * this stream's volume (for example, if a call is in progress, its stream's 5926 * volume may be changed instead). To reset back to the default, use 5927 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 5928 * 5929 * @param streamType The type of the audio stream whose volume should be 5930 * changed by the hardware volume controls. 5931 */ 5932 public final void setVolumeControlStream(int streamType) { 5933 getWindow().setVolumeControlStream(streamType); 5934 } 5935 5936 /** 5937 * Gets the suggested audio stream whose volume should be changed by the 5938 * hardware volume controls. 5939 * 5940 * @return The suggested audio stream type whose volume should be changed by 5941 * the hardware volume controls. 5942 * @see #setVolumeControlStream(int) 5943 */ 5944 public final int getVolumeControlStream() { 5945 return getWindow().getVolumeControlStream(); 5946 } 5947 5948 /** 5949 * Sets a {@link MediaController} to send media keys and volume changes to. 5950 * <p> 5951 * The controller will be tied to the window of this Activity. Media key and 5952 * volume events which are received while the Activity is in the foreground 5953 * will be forwarded to the controller and used to invoke transport controls 5954 * or adjust the volume. This may be used instead of or in addition to 5955 * {@link #setVolumeControlStream} to affect a specific session instead of a 5956 * specific stream. 5957 * <p> 5958 * It is not guaranteed that the hardware volume controls will always change 5959 * this session's volume (for example, if a call is in progress, its 5960 * stream's volume may be changed instead). To reset back to the default use 5961 * null as the controller. 5962 * 5963 * @param controller The controller for the session which should receive 5964 * media keys and volume changes. 5965 */ 5966 public final void setMediaController(MediaController controller) { 5967 getWindow().setMediaController(controller); 5968 } 5969 5970 /** 5971 * Gets the controller which should be receiving media key and volume events 5972 * while this activity is in the foreground. 5973 * 5974 * @return The controller which should receive events. 5975 * @see #setMediaController(android.media.session.MediaController) 5976 */ 5977 public final MediaController getMediaController() { 5978 return getWindow().getMediaController(); 5979 } 5980 5981 /** 5982 * Runs the specified action on the UI thread. If the current thread is the UI 5983 * thread, then the action is executed immediately. If the current thread is 5984 * not the UI thread, the action is posted to the event queue of the UI thread. 5985 * 5986 * @param action the action to run on the UI thread 5987 */ 5988 public final void runOnUiThread(Runnable action) { 5989 if (Thread.currentThread() != mUiThread) { 5990 mHandler.post(action); 5991 } else { 5992 action.run(); 5993 } 5994 } 5995 5996 /** 5997 * Standard implementation of 5998 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 5999 * inflating with the LayoutInflater returned by {@link #getSystemService}. 6000 * This implementation does nothing and is for 6001 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 6002 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 6003 * 6004 * @see android.view.LayoutInflater#createView 6005 * @see android.view.Window#getLayoutInflater 6006 */ 6007 @Nullable 6008 public View onCreateView(String name, Context context, AttributeSet attrs) { 6009 return null; 6010 } 6011 6012 /** 6013 * Standard implementation of 6014 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 6015 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 6016 * This implementation handles <fragment> tags to embed fragments inside 6017 * of the activity. 6018 * 6019 * @see android.view.LayoutInflater#createView 6020 * @see android.view.Window#getLayoutInflater 6021 */ 6022 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 6023 if (!"fragment".equals(name)) { 6024 return onCreateView(name, context, attrs); 6025 } 6026 6027 return mFragments.onCreateView(parent, name, context, attrs); 6028 } 6029 6030 /** 6031 * Print the Activity's state into the given stream. This gets invoked if 6032 * you run "adb shell dumpsys activity <activity_component_name>". 6033 * 6034 * @param prefix Desired prefix to prepend at each line of output. 6035 * @param fd The raw file descriptor that the dump is being sent to. 6036 * @param writer The PrintWriter to which you should dump your state. This will be 6037 * closed for you after you return. 6038 * @param args additional arguments to the dump request. 6039 */ 6040 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 6041 dumpInner(prefix, fd, writer, args); 6042 } 6043 6044 void dumpInner(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 6045 writer.print(prefix); writer.print("Local Activity "); 6046 writer.print(Integer.toHexString(System.identityHashCode(this))); 6047 writer.println(" State:"); 6048 String innerPrefix = prefix + " "; 6049 writer.print(innerPrefix); writer.print("mResumed="); 6050 writer.print(mResumed); writer.print(" mStopped="); 6051 writer.print(mStopped); writer.print(" mFinished="); 6052 writer.println(mFinished); 6053 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 6054 writer.println(mChangingConfigurations); 6055 writer.print(innerPrefix); writer.print("mCurrentConfig="); 6056 writer.println(mCurrentConfig); 6057 6058 mFragments.dumpLoaders(innerPrefix, fd, writer, args); 6059 mFragments.getFragmentManager().dump(innerPrefix, fd, writer, args); 6060 if (mVoiceInteractor != null) { 6061 mVoiceInteractor.dump(innerPrefix, fd, writer, args); 6062 } 6063 6064 if (getWindow() != null && 6065 getWindow().peekDecorView() != null && 6066 getWindow().peekDecorView().getViewRootImpl() != null) { 6067 getWindow().peekDecorView().getViewRootImpl().dump(prefix, fd, writer, args); 6068 } 6069 6070 if (mAutoFillCallback != null) { 6071 writer.print(prefix); writer.print("mAutoFillCallback: " ); 6072 writer.println(mAutoFillCallback.get()); 6073 } 6074 6075 mHandler.getLooper().dump(new PrintWriterPrinter(writer), prefix); 6076 } 6077 6078 /** 6079 * Bit indicating that this activity is "immersive" and should not be 6080 * interrupted by notifications if possible. 6081 * 6082 * This value is initially set by the manifest property 6083 * <code>android:immersive</code> but may be changed at runtime by 6084 * {@link #setImmersive}. 6085 * 6086 * @see #setImmersive(boolean) 6087 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6088 */ 6089 public boolean isImmersive() { 6090 try { 6091 return ActivityManager.getService().isImmersive(mToken); 6092 } catch (RemoteException e) { 6093 return false; 6094 } 6095 } 6096 6097 /** 6098 * Indication of whether this is the highest level activity in this task. Can be used to 6099 * determine whether an activity launched by this activity was placed in the same task or 6100 * another task. 6101 * 6102 * @return true if this is the topmost, non-finishing activity in its task. 6103 */ 6104 private boolean isTopOfTask() { 6105 if (mToken == null || mWindow == null) { 6106 return false; 6107 } 6108 try { 6109 return ActivityManager.getService().isTopOfTask(getActivityToken()); 6110 } catch (RemoteException e) { 6111 return false; 6112 } 6113 } 6114 6115 /** 6116 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} to a 6117 * fullscreen opaque Activity. 6118 * <p> 6119 * Call this whenever the background of a translucent Activity has changed to become opaque. 6120 * Doing so will allow the {@link android.view.Surface} of the Activity behind to be released. 6121 * <p> 6122 * This call has no effect on non-translucent activities or on activities with the 6123 * {@link android.R.attr#windowIsFloating} attribute. 6124 * 6125 * @see #convertToTranslucent(android.app.Activity.TranslucentConversionListener, 6126 * ActivityOptions) 6127 * @see TranslucentConversionListener 6128 * 6129 * @hide 6130 */ 6131 @SystemApi 6132 public void convertFromTranslucent() { 6133 try { 6134 mTranslucentCallback = null; 6135 if (ActivityManager.getService().convertFromTranslucent(mToken)) { 6136 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, true); 6137 } 6138 } catch (RemoteException e) { 6139 // pass 6140 } 6141 } 6142 6143 /** 6144 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} back from 6145 * opaque to translucent following a call to {@link #convertFromTranslucent()}. 6146 * <p> 6147 * Calling this allows the Activity behind this one to be seen again. Once all such Activities 6148 * have been redrawn {@link TranslucentConversionListener#onTranslucentConversionComplete} will 6149 * be called indicating that it is safe to make this activity translucent again. Until 6150 * {@link TranslucentConversionListener#onTranslucentConversionComplete} is called the image 6151 * behind the frontmost Activity will be indeterminate. 6152 * <p> 6153 * This call has no effect on non-translucent activities or on activities with the 6154 * {@link android.R.attr#windowIsFloating} attribute. 6155 * 6156 * @param callback the method to call when all visible Activities behind this one have been 6157 * drawn and it is safe to make this Activity translucent again. 6158 * @param options activity options delivered to the activity below this one. The options 6159 * are retrieved using {@link #getActivityOptions}. 6160 * @return <code>true</code> if Window was opaque and will become translucent or 6161 * <code>false</code> if window was translucent and no change needed to be made. 6162 * 6163 * @see #convertFromTranslucent() 6164 * @see TranslucentConversionListener 6165 * 6166 * @hide 6167 */ 6168 @SystemApi 6169 public boolean convertToTranslucent(TranslucentConversionListener callback, 6170 ActivityOptions options) { 6171 boolean drawComplete; 6172 try { 6173 mTranslucentCallback = callback; 6174 mChangeCanvasToTranslucent = ActivityManager.getService().convertToTranslucent( 6175 mToken, options == null ? null : options.toBundle()); 6176 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 6177 drawComplete = true; 6178 } catch (RemoteException e) { 6179 // Make callback return as though it timed out. 6180 mChangeCanvasToTranslucent = false; 6181 drawComplete = false; 6182 } 6183 if (!mChangeCanvasToTranslucent && mTranslucentCallback != null) { 6184 // Window is already translucent. 6185 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 6186 } 6187 return mChangeCanvasToTranslucent; 6188 } 6189 6190 /** @hide */ 6191 void onTranslucentConversionComplete(boolean drawComplete) { 6192 if (mTranslucentCallback != null) { 6193 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 6194 mTranslucentCallback = null; 6195 } 6196 if (mChangeCanvasToTranslucent) { 6197 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 6198 } 6199 } 6200 6201 /** @hide */ 6202 public void onNewActivityOptions(ActivityOptions options) { 6203 mActivityTransitionState.setEnterActivityOptions(this, options); 6204 if (!mStopped) { 6205 mActivityTransitionState.enterReady(this); 6206 } 6207 } 6208 6209 /** 6210 * Retrieve the ActivityOptions passed in from the launching activity or passed back 6211 * from an activity launched by this activity in its call to {@link 6212 * #convertToTranslucent(TranslucentConversionListener, ActivityOptions)} 6213 * 6214 * @return The ActivityOptions passed to {@link #convertToTranslucent}. 6215 * @hide 6216 */ 6217 ActivityOptions getActivityOptions() { 6218 try { 6219 return ActivityOptions.fromBundle( 6220 ActivityManager.getService().getActivityOptions(mToken)); 6221 } catch (RemoteException e) { 6222 } 6223 return null; 6224 } 6225 6226 /** 6227 * Activities that want to remain visible behind a translucent activity above them must call 6228 * this method anytime between the start of {@link #onResume()} and the return from 6229 * {@link #onPause()}. If this call is successful then the activity will remain visible after 6230 * {@link #onPause()} is called, and is allowed to continue playing media in the background. 6231 * 6232 * <p>The actions of this call are reset each time that this activity is brought to the 6233 * front. That is, every time {@link #onResume()} is called the activity will be assumed 6234 * to not have requested visible behind. Therefore, if you want this activity to continue to 6235 * be visible in the background you must call this method again. 6236 * 6237 * <p>Only fullscreen opaque activities may make this call. I.e. this call is a nop 6238 * for dialog and translucent activities. 6239 * 6240 * <p>Under all circumstances, the activity must stop playing and release resources prior to or 6241 * within a call to {@link #onVisibleBehindCanceled()} or if this call returns false. 6242 * 6243 * <p>False will be returned any time this method is called between the return of onPause and 6244 * the next call to onResume. 6245 * 6246 * @param visible true to notify the system that the activity wishes to be visible behind other 6247 * translucent activities, false to indicate otherwise. Resources must be 6248 * released when passing false to this method. 6249 * @return the resulting visibiity state. If true the activity will remain visible beyond 6250 * {@link #onPause()} if the next activity is translucent or not fullscreen. If false 6251 * then the activity may not count on being visible behind other translucent activities, 6252 * and must stop any media playback and release resources. 6253 * Returning false may occur in lieu of a call to {@link #onVisibleBehindCanceled()} so 6254 * the return value must be checked. 6255 * 6256 * @see #onVisibleBehindCanceled() 6257 */ 6258 public boolean requestVisibleBehind(boolean visible) { 6259 if (!mResumed) { 6260 // Do not permit paused or stopped activities to do this. 6261 visible = false; 6262 } 6263 try { 6264 mVisibleBehind = ActivityManager.getService() 6265 .requestVisibleBehind(mToken, visible) && visible; 6266 } catch (RemoteException e) { 6267 mVisibleBehind = false; 6268 } 6269 return mVisibleBehind; 6270 } 6271 6272 /** 6273 * Called when a translucent activity over this activity is becoming opaque or another 6274 * activity is being launched. Activities that override this method must call 6275 * <code>super.onVisibleBehindCanceled()</code> or a SuperNotCalledException will be thrown. 6276 * 6277 * <p>When this method is called the activity has 500 msec to release any resources it may be 6278 * using while visible in the background. 6279 * If the activity has not returned from this method in 500 msec the system will destroy 6280 * the activity and kill the process in order to recover the resources for another 6281 * process. Otherwise {@link #onStop()} will be called following return. 6282 * 6283 * @see #requestVisibleBehind(boolean) 6284 */ 6285 @CallSuper 6286 public void onVisibleBehindCanceled() { 6287 mCalled = true; 6288 } 6289 6290 /** 6291 * Translucent activities may call this to determine if there is an activity below them that 6292 * is currently set to be visible in the background. 6293 * 6294 * @return true if an activity below is set to visible according to the most recent call to 6295 * {@link #requestVisibleBehind(boolean)}, false otherwise. 6296 * 6297 * @see #requestVisibleBehind(boolean) 6298 * @see #onVisibleBehindCanceled() 6299 * @see #onBackgroundVisibleBehindChanged(boolean) 6300 * @hide 6301 */ 6302 @SystemApi 6303 public boolean isBackgroundVisibleBehind() { 6304 try { 6305 return ActivityManager.getService().isBackgroundVisibleBehind(mToken); 6306 } catch (RemoteException e) { 6307 } 6308 return false; 6309 } 6310 6311 /** 6312 * The topmost foreground activity will receive this call when the background visibility state 6313 * of the activity below it changes. 6314 * 6315 * This call may be a consequence of {@link #requestVisibleBehind(boolean)} or might be 6316 * due to a background activity finishing itself. 6317 * 6318 * @param visible true if a background activity is visible, false otherwise. 6319 * 6320 * @see #requestVisibleBehind(boolean) 6321 * @see #onVisibleBehindCanceled() 6322 * @hide 6323 */ 6324 @SystemApi 6325 public void onBackgroundVisibleBehindChanged(boolean visible) { 6326 } 6327 6328 /** 6329 * Activities cannot draw during the period that their windows are animating in. In order 6330 * to know when it is safe to begin drawing they can override this method which will be 6331 * called when the entering animation has completed. 6332 */ 6333 public void onEnterAnimationComplete() { 6334 } 6335 6336 /** 6337 * @hide 6338 */ 6339 public void dispatchEnterAnimationComplete() { 6340 onEnterAnimationComplete(); 6341 if (getWindow() != null && getWindow().getDecorView() != null) { 6342 getWindow().getDecorView().getViewTreeObserver().dispatchOnEnterAnimationComplete(); 6343 } 6344 } 6345 6346 /** 6347 * Adjust the current immersive mode setting. 6348 * 6349 * Note that changing this value will have no effect on the activity's 6350 * {@link android.content.pm.ActivityInfo} structure; that is, if 6351 * <code>android:immersive</code> is set to <code>true</code> 6352 * in the application's manifest entry for this activity, the {@link 6353 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 6354 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6355 * FLAG_IMMERSIVE} bit set. 6356 * 6357 * @see #isImmersive() 6358 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6359 */ 6360 public void setImmersive(boolean i) { 6361 try { 6362 ActivityManager.getService().setImmersive(mToken, i); 6363 } catch (RemoteException e) { 6364 // pass 6365 } 6366 } 6367 6368 /** 6369 * Enable or disable virtual reality (VR) mode for this Activity. 6370 * 6371 * <p>VR mode is a hint to Android system to switch to a mode optimized for VR applications 6372 * while this Activity has user focus.</p> 6373 * 6374 * <p>It is recommended that applications additionally declare 6375 * {@link android.R.attr#enableVrMode} in their manifest to allow for smooth activity 6376 * transitions when switching between VR activities.</p> 6377 * 6378 * <p>If the requested {@link android.service.vr.VrListenerService} component is not available, 6379 * VR mode will not be started. Developers can handle this case as follows:</p> 6380 * 6381 * <pre> 6382 * String servicePackage = "com.whatever.app"; 6383 * String serviceClass = "com.whatever.app.MyVrListenerService"; 6384 * 6385 * // Name of the component of the VrListenerService to start. 6386 * ComponentName serviceComponent = new ComponentName(servicePackage, serviceClass); 6387 * 6388 * try { 6389 * setVrModeEnabled(true, myComponentName); 6390 * } catch (PackageManager.NameNotFoundException e) { 6391 * List<ApplicationInfo> installed = getPackageManager().getInstalledApplications(0); 6392 * boolean isInstalled = false; 6393 * for (ApplicationInfo app : installed) { 6394 * if (app.packageName.equals(servicePackage)) { 6395 * isInstalled = true; 6396 * break; 6397 * } 6398 * } 6399 * if (isInstalled) { 6400 * // Package is installed, but not enabled in Settings. Let user enable it. 6401 * startActivity(new Intent(Settings.ACTION_VR_LISTENER_SETTINGS)); 6402 * } else { 6403 * // Package is not installed. Send an intent to download this. 6404 * sentIntentToLaunchAppStore(servicePackage); 6405 * } 6406 * } 6407 * </pre> 6408 * 6409 * @param enabled {@code true} to enable this mode. 6410 * @param requestedComponent the name of the component to use as a 6411 * {@link android.service.vr.VrListenerService} while VR mode is enabled. 6412 * 6413 * @throws android.content.pm.PackageManager.NameNotFoundException if the given component 6414 * to run as a {@link android.service.vr.VrListenerService} is not installed, or has 6415 * not been enabled in user settings. 6416 * 6417 * @see android.content.pm.PackageManager#FEATURE_VR_MODE 6418 * @see android.content.pm.PackageManager#FEATURE_VR_MODE_HIGH_PERFORMANCE 6419 * @see android.service.vr.VrListenerService 6420 * @see android.provider.Settings#ACTION_VR_LISTENER_SETTINGS 6421 * @see android.R.attr#enableVrMode 6422 */ 6423 public void setVrModeEnabled(boolean enabled, @NonNull ComponentName requestedComponent) 6424 throws PackageManager.NameNotFoundException { 6425 try { 6426 if (ActivityManager.getService().setVrMode(mToken, enabled, requestedComponent) 6427 != 0) { 6428 throw new PackageManager.NameNotFoundException( 6429 requestedComponent.flattenToString()); 6430 } 6431 } catch (RemoteException e) { 6432 // pass 6433 } 6434 } 6435 6436 /** 6437 * Start an action mode of the default type {@link ActionMode#TYPE_PRIMARY}. 6438 * 6439 * @param callback Callback that will manage lifecycle events for this action mode 6440 * @return The ActionMode that was started, or null if it was canceled 6441 * 6442 * @see ActionMode 6443 */ 6444 @Nullable 6445 public ActionMode startActionMode(ActionMode.Callback callback) { 6446 return mWindow.getDecorView().startActionMode(callback); 6447 } 6448 6449 /** 6450 * Start an action mode of the given type. 6451 * 6452 * @param callback Callback that will manage lifecycle events for this action mode 6453 * @param type One of {@link ActionMode#TYPE_PRIMARY} or {@link ActionMode#TYPE_FLOATING}. 6454 * @return The ActionMode that was started, or null if it was canceled 6455 * 6456 * @see ActionMode 6457 */ 6458 @Nullable 6459 public ActionMode startActionMode(ActionMode.Callback callback, int type) { 6460 return mWindow.getDecorView().startActionMode(callback, type); 6461 } 6462 6463 /** 6464 * Give the Activity a chance to control the UI for an action mode requested 6465 * by the system. 6466 * 6467 * <p>Note: If you are looking for a notification callback that an action mode 6468 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 6469 * 6470 * @param callback The callback that should control the new action mode 6471 * @return The new action mode, or <code>null</code> if the activity does not want to 6472 * provide special handling for this action mode. (It will be handled by the system.) 6473 */ 6474 @Nullable 6475 @Override 6476 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 6477 // Only Primary ActionModes are represented in the ActionBar. 6478 if (mActionModeTypeStarting == ActionMode.TYPE_PRIMARY) { 6479 initWindowDecorActionBar(); 6480 if (mActionBar != null) { 6481 return mActionBar.startActionMode(callback); 6482 } 6483 } 6484 return null; 6485 } 6486 6487 /** 6488 * {@inheritDoc} 6489 */ 6490 @Nullable 6491 @Override 6492 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback, int type) { 6493 try { 6494 mActionModeTypeStarting = type; 6495 return onWindowStartingActionMode(callback); 6496 } finally { 6497 mActionModeTypeStarting = ActionMode.TYPE_PRIMARY; 6498 } 6499 } 6500 6501 /** 6502 * Notifies the Activity that an action mode has been started. 6503 * Activity subclasses overriding this method should call the superclass implementation. 6504 * 6505 * @param mode The new action mode. 6506 */ 6507 @CallSuper 6508 @Override 6509 public void onActionModeStarted(ActionMode mode) { 6510 } 6511 6512 /** 6513 * Notifies the activity that an action mode has finished. 6514 * Activity subclasses overriding this method should call the superclass implementation. 6515 * 6516 * @param mode The action mode that just finished. 6517 */ 6518 @CallSuper 6519 @Override 6520 public void onActionModeFinished(ActionMode mode) { 6521 } 6522 6523 /** 6524 * Returns true if the app should recreate the task when navigating 'up' from this activity 6525 * by using targetIntent. 6526 * 6527 * <p>If this method returns false the app can trivially call 6528 * {@link #navigateUpTo(Intent)} using the same parameters to correctly perform 6529 * up navigation. If this method returns false, the app should synthesize a new task stack 6530 * by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation.</p> 6531 * 6532 * @param targetIntent An intent representing the target destination for up navigation 6533 * @return true if navigating up should recreate a new task stack, false if the same task 6534 * should be used for the destination 6535 */ 6536 public boolean shouldUpRecreateTask(Intent targetIntent) { 6537 try { 6538 PackageManager pm = getPackageManager(); 6539 ComponentName cn = targetIntent.getComponent(); 6540 if (cn == null) { 6541 cn = targetIntent.resolveActivity(pm); 6542 } 6543 ActivityInfo info = pm.getActivityInfo(cn, 0); 6544 if (info.taskAffinity == null) { 6545 return false; 6546 } 6547 return ActivityManager.getService() 6548 .shouldUpRecreateTask(mToken, info.taskAffinity); 6549 } catch (RemoteException e) { 6550 return false; 6551 } catch (NameNotFoundException e) { 6552 return false; 6553 } 6554 } 6555 6556 /** 6557 * Navigate from this activity to the activity specified by upIntent, finishing this activity 6558 * in the process. If the activity indicated by upIntent already exists in the task's history, 6559 * this activity and all others before the indicated activity in the history stack will be 6560 * finished. 6561 * 6562 * <p>If the indicated activity does not appear in the history stack, this will finish 6563 * each activity in this task until the root activity of the task is reached, resulting in 6564 * an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy 6565 * when an activity may be reached by a path not passing through a canonical parent 6566 * activity.</p> 6567 * 6568 * <p>This method should be used when performing up navigation from within the same task 6569 * as the destination. If up navigation should cross tasks in some cases, see 6570 * {@link #shouldUpRecreateTask(Intent)}.</p> 6571 * 6572 * @param upIntent An intent representing the target destination for up navigation 6573 * 6574 * @return true if up navigation successfully reached the activity indicated by upIntent and 6575 * upIntent was delivered to it. false if an instance of the indicated activity could 6576 * not be found and this activity was simply finished normally. 6577 */ 6578 public boolean navigateUpTo(Intent upIntent) { 6579 if (mParent == null) { 6580 ComponentName destInfo = upIntent.getComponent(); 6581 if (destInfo == null) { 6582 destInfo = upIntent.resolveActivity(getPackageManager()); 6583 if (destInfo == null) { 6584 return false; 6585 } 6586 upIntent = new Intent(upIntent); 6587 upIntent.setComponent(destInfo); 6588 } 6589 int resultCode; 6590 Intent resultData; 6591 synchronized (this) { 6592 resultCode = mResultCode; 6593 resultData = mResultData; 6594 } 6595 if (resultData != null) { 6596 resultData.prepareToLeaveProcess(this); 6597 } 6598 try { 6599 upIntent.prepareToLeaveProcess(this); 6600 return ActivityManager.getService().navigateUpTo(mToken, upIntent, 6601 resultCode, resultData); 6602 } catch (RemoteException e) { 6603 return false; 6604 } 6605 } else { 6606 return mParent.navigateUpToFromChild(this, upIntent); 6607 } 6608 } 6609 6610 /** 6611 * This is called when a child activity of this one calls its 6612 * {@link #navigateUpTo} method. The default implementation simply calls 6613 * navigateUpTo(upIntent) on this activity (the parent). 6614 * 6615 * @param child The activity making the call. 6616 * @param upIntent An intent representing the target destination for up navigation 6617 * 6618 * @return true if up navigation successfully reached the activity indicated by upIntent and 6619 * upIntent was delivered to it. false if an instance of the indicated activity could 6620 * not be found and this activity was simply finished normally. 6621 */ 6622 public boolean navigateUpToFromChild(Activity child, Intent upIntent) { 6623 return navigateUpTo(upIntent); 6624 } 6625 6626 /** 6627 * Obtain an {@link Intent} that will launch an explicit target activity specified by 6628 * this activity's logical parent. The logical parent is named in the application's manifest 6629 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute. 6630 * Activity subclasses may override this method to modify the Intent returned by 6631 * super.getParentActivityIntent() or to implement a different mechanism of retrieving 6632 * the parent intent entirely. 6633 * 6634 * @return a new Intent targeting the defined parent of this activity or null if 6635 * there is no valid parent. 6636 */ 6637 @Nullable 6638 public Intent getParentActivityIntent() { 6639 final String parentName = mActivityInfo.parentActivityName; 6640 if (TextUtils.isEmpty(parentName)) { 6641 return null; 6642 } 6643 6644 // If the parent itself has no parent, generate a main activity intent. 6645 final ComponentName target = new ComponentName(this, parentName); 6646 try { 6647 final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0); 6648 final String parentActivity = parentInfo.parentActivityName; 6649 final Intent parentIntent = parentActivity == null 6650 ? Intent.makeMainActivity(target) 6651 : new Intent().setComponent(target); 6652 return parentIntent; 6653 } catch (NameNotFoundException e) { 6654 Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName + 6655 "' in manifest"); 6656 return null; 6657 } 6658 } 6659 6660 /** 6661 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6662 * android.view.View, String)} was used to start an Activity, <var>callback</var> 6663 * will be called to handle shared elements on the <i>launched</i> Activity. This requires 6664 * {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 6665 * 6666 * @param callback Used to manipulate shared element transitions on the launched Activity. 6667 */ 6668 public void setEnterSharedElementCallback(SharedElementCallback callback) { 6669 if (callback == null) { 6670 callback = SharedElementCallback.NULL_CALLBACK; 6671 } 6672 mEnterTransitionListener = callback; 6673 } 6674 6675 /** 6676 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6677 * android.view.View, String)} was used to start an Activity, <var>callback</var> 6678 * will be called to handle shared elements on the <i>launching</i> Activity. Most 6679 * calls will only come when returning from the started Activity. 6680 * This requires {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 6681 * 6682 * @param callback Used to manipulate shared element transitions on the launching Activity. 6683 */ 6684 public void setExitSharedElementCallback(SharedElementCallback callback) { 6685 if (callback == null) { 6686 callback = SharedElementCallback.NULL_CALLBACK; 6687 } 6688 mExitTransitionListener = callback; 6689 } 6690 6691 /** 6692 * Postpone the entering activity transition when Activity was started with 6693 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6694 * android.util.Pair[])}. 6695 * <p>This method gives the Activity the ability to delay starting the entering and 6696 * shared element transitions until all data is loaded. Until then, the Activity won't 6697 * draw into its window, leaving the window transparent. This may also cause the 6698 * returning animation to be delayed until data is ready. This method should be 6699 * called in {@link #onCreate(android.os.Bundle)} or in 6700 * {@link #onActivityReenter(int, android.content.Intent)}. 6701 * {@link #startPostponedEnterTransition()} must be called to allow the Activity to 6702 * start the transitions. If the Activity did not use 6703 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6704 * android.util.Pair[])}, then this method does nothing.</p> 6705 */ 6706 public void postponeEnterTransition() { 6707 mActivityTransitionState.postponeEnterTransition(); 6708 } 6709 6710 /** 6711 * Begin postponed transitions after {@link #postponeEnterTransition()} was called. 6712 * If postponeEnterTransition() was called, you must call startPostponedEnterTransition() 6713 * to have your Activity start drawing. 6714 */ 6715 public void startPostponedEnterTransition() { 6716 mActivityTransitionState.startPostponedEnterTransition(); 6717 } 6718 6719 /** 6720 * Create {@link DragAndDropPermissions} object bound to this activity and controlling the 6721 * access permissions for content URIs associated with the {@link DragEvent}. 6722 * @param event Drag event 6723 * @return The {@link DragAndDropPermissions} object used to control access to the content URIs. 6724 * Null if no content URIs are associated with the event or if permissions could not be granted. 6725 */ 6726 public DragAndDropPermissions requestDragAndDropPermissions(DragEvent event) { 6727 DragAndDropPermissions dragAndDropPermissions = DragAndDropPermissions.obtain(event); 6728 if (dragAndDropPermissions != null && dragAndDropPermissions.take(getActivityToken())) { 6729 return dragAndDropPermissions; 6730 } 6731 return null; 6732 } 6733 6734 // ------------------ Internal API ------------------ 6735 6736 final void setParent(Activity parent) { 6737 mParent = parent; 6738 } 6739 6740 final void attach(Context context, ActivityThread aThread, 6741 Instrumentation instr, IBinder token, int ident, 6742 Application application, Intent intent, ActivityInfo info, 6743 CharSequence title, Activity parent, String id, 6744 NonConfigurationInstances lastNonConfigurationInstances, 6745 Configuration config, String referrer, IVoiceInteractor voiceInteractor, 6746 Window window) { 6747 attachBaseContext(context); 6748 6749 mFragments.attachHost(null /*parent*/); 6750 6751 mWindow = new PhoneWindow(this, window); 6752 mWindow.setWindowControllerCallback(this); 6753 mWindow.setCallback(this); 6754 mWindow.setOnWindowDismissedCallback(this); 6755 mWindow.getLayoutInflater().setPrivateFactory(this); 6756 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 6757 mWindow.setSoftInputMode(info.softInputMode); 6758 } 6759 if (info.uiOptions != 0) { 6760 mWindow.setUiOptions(info.uiOptions); 6761 } 6762 mUiThread = Thread.currentThread(); 6763 6764 mMainThread = aThread; 6765 mInstrumentation = instr; 6766 mToken = token; 6767 mIdent = ident; 6768 mApplication = application; 6769 mIntent = intent; 6770 mReferrer = referrer; 6771 mComponent = intent.getComponent(); 6772 mActivityInfo = info; 6773 mTitle = title; 6774 mParent = parent; 6775 mEmbeddedID = id; 6776 mLastNonConfigurationInstances = lastNonConfigurationInstances; 6777 if (voiceInteractor != null) { 6778 if (lastNonConfigurationInstances != null) { 6779 mVoiceInteractor = lastNonConfigurationInstances.voiceInteractor; 6780 } else { 6781 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 6782 Looper.myLooper()); 6783 } 6784 } 6785 6786 mWindow.setWindowManager( 6787 (WindowManager)context.getSystemService(Context.WINDOW_SERVICE), 6788 mToken, mComponent.flattenToString(), 6789 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 6790 if (mParent != null) { 6791 mWindow.setContainer(mParent.getWindow()); 6792 } 6793 mWindowManager = mWindow.getWindowManager(); 6794 mCurrentConfig = config; 6795 6796 mWindow.setColorMode(info.colorMode); 6797 } 6798 6799 /** @hide */ 6800 public final IBinder getActivityToken() { 6801 return mParent != null ? mParent.getActivityToken() : mToken; 6802 } 6803 6804 final void performCreateCommon() { 6805 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 6806 com.android.internal.R.styleable.Window_windowNoDisplay, false); 6807 mFragments.dispatchActivityCreated(); 6808 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6809 } 6810 6811 final void performCreate(Bundle icicle) { 6812 restoreHasCurrentPermissionRequest(icicle); 6813 onCreate(icicle); 6814 mActivityTransitionState.readState(icicle); 6815 performCreateCommon(); 6816 } 6817 6818 final void performCreate(Bundle icicle, PersistableBundle persistentState) { 6819 restoreHasCurrentPermissionRequest(icicle); 6820 onCreate(icicle, persistentState); 6821 mActivityTransitionState.readState(icicle); 6822 performCreateCommon(); 6823 } 6824 6825 final void performStart() { 6826 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6827 mFragments.noteStateNotSaved(); 6828 mCalled = false; 6829 mFragments.execPendingActions(); 6830 mInstrumentation.callActivityOnStart(this); 6831 if (!mCalled) { 6832 throw new SuperNotCalledException( 6833 "Activity " + mComponent.toShortString() + 6834 " did not call through to super.onStart()"); 6835 } 6836 mFragments.dispatchStart(); 6837 mFragments.reportLoaderStart(); 6838 6839 // This property is set for all builds except final release 6840 boolean isDlwarningEnabled = SystemProperties.getInt("ro.bionic.ld.warning", 0) == 1; 6841 boolean isAppDebuggable = 6842 (mApplication.getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0; 6843 6844 if (isAppDebuggable || isDlwarningEnabled) { 6845 String dlwarning = getDlWarning(); 6846 if (dlwarning != null) { 6847 String appName = getApplicationInfo().loadLabel(getPackageManager()) 6848 .toString(); 6849 String warning = "Detected problems with app native libraries\n" + 6850 "(please consult log for detail):\n" + dlwarning; 6851 if (isAppDebuggable) { 6852 new AlertDialog.Builder(this). 6853 setTitle(appName). 6854 setMessage(warning). 6855 setPositiveButton(android.R.string.ok, null). 6856 setCancelable(false). 6857 show(); 6858 } else { 6859 Toast.makeText(this, appName + "\n" + warning, Toast.LENGTH_LONG).show(); 6860 } 6861 } 6862 } 6863 6864 mActivityTransitionState.enterReady(this); 6865 } 6866 6867 final void performRestart() { 6868 mFragments.noteStateNotSaved(); 6869 6870 if (mToken != null && mParent == null) { 6871 // No need to check mStopped, the roots will check if they were actually stopped. 6872 WindowManagerGlobal.getInstance().setStoppedState(mToken, false /* stopped */); 6873 } 6874 6875 if (mStopped) { 6876 mStopped = false; 6877 6878 synchronized (mManagedCursors) { 6879 final int N = mManagedCursors.size(); 6880 for (int i=0; i<N; i++) { 6881 ManagedCursor mc = mManagedCursors.get(i); 6882 if (mc.mReleased || mc.mUpdated) { 6883 if (!mc.mCursor.requery()) { 6884 if (getApplicationInfo().targetSdkVersion 6885 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 6886 throw new IllegalStateException( 6887 "trying to requery an already closed cursor " 6888 + mc.mCursor); 6889 } 6890 } 6891 mc.mReleased = false; 6892 mc.mUpdated = false; 6893 } 6894 } 6895 } 6896 6897 mCalled = false; 6898 mInstrumentation.callActivityOnRestart(this); 6899 if (!mCalled) { 6900 throw new SuperNotCalledException( 6901 "Activity " + mComponent.toShortString() + 6902 " did not call through to super.onRestart()"); 6903 } 6904 performStart(); 6905 } 6906 } 6907 6908 final void performResume() { 6909 performRestart(); 6910 6911 mFragments.execPendingActions(); 6912 6913 mLastNonConfigurationInstances = null; 6914 6915 mCalled = false; 6916 // mResumed is set by the instrumentation 6917 mInstrumentation.callActivityOnResume(this); 6918 if (!mCalled) { 6919 throw new SuperNotCalledException( 6920 "Activity " + mComponent.toShortString() + 6921 " did not call through to super.onResume()"); 6922 } 6923 6924 // invisible activities must be finished before onResume() completes 6925 if (!mVisibleFromClient && !mFinished) { 6926 Log.w(TAG, "An activity without a UI must call finish() before onResume() completes"); 6927 if (getApplicationInfo().targetSdkVersion 6928 > android.os.Build.VERSION_CODES.LOLLIPOP_MR1) { 6929 throw new IllegalStateException( 6930 "Activity " + mComponent.toShortString() + 6931 " did not call finish() prior to onResume() completing"); 6932 } 6933 } 6934 6935 // Now really resume, and install the current status bar and menu. 6936 mCalled = false; 6937 6938 mFragments.dispatchResume(); 6939 mFragments.execPendingActions(); 6940 6941 onPostResume(); 6942 if (!mCalled) { 6943 throw new SuperNotCalledException( 6944 "Activity " + mComponent.toShortString() + 6945 " did not call through to super.onPostResume()"); 6946 } 6947 } 6948 6949 final void performPause() { 6950 mDoReportFullyDrawn = false; 6951 mFragments.dispatchPause(); 6952 mCalled = false; 6953 onPause(); 6954 mResumed = false; 6955 if (!mCalled && getApplicationInfo().targetSdkVersion 6956 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 6957 throw new SuperNotCalledException( 6958 "Activity " + mComponent.toShortString() + 6959 " did not call through to super.onPause()"); 6960 } 6961 mResumed = false; 6962 } 6963 6964 final void performUserLeaving() { 6965 onUserInteraction(); 6966 onUserLeaveHint(); 6967 } 6968 6969 final void performStop(boolean preserveWindow) { 6970 mDoReportFullyDrawn = false; 6971 mFragments.doLoaderStop(mChangingConfigurations /*retain*/); 6972 6973 if (!mStopped) { 6974 if (mWindow != null) { 6975 mWindow.closeAllPanels(); 6976 } 6977 6978 // If we're preserving the window, don't setStoppedState to true, since we 6979 // need the window started immediately again. Stopping the window will 6980 // destroys hardware resources and causes flicker. 6981 if (!preserveWindow && mToken != null && mParent == null) { 6982 WindowManagerGlobal.getInstance().setStoppedState(mToken, true); 6983 } 6984 6985 mFragments.dispatchStop(); 6986 6987 mCalled = false; 6988 mInstrumentation.callActivityOnStop(this); 6989 if (!mCalled) { 6990 throw new SuperNotCalledException( 6991 "Activity " + mComponent.toShortString() + 6992 " did not call through to super.onStop()"); 6993 } 6994 6995 synchronized (mManagedCursors) { 6996 final int N = mManagedCursors.size(); 6997 for (int i=0; i<N; i++) { 6998 ManagedCursor mc = mManagedCursors.get(i); 6999 if (!mc.mReleased) { 7000 mc.mCursor.deactivate(); 7001 mc.mReleased = true; 7002 } 7003 } 7004 } 7005 7006 mStopped = true; 7007 } 7008 mResumed = false; 7009 } 7010 7011 final void performDestroy() { 7012 mDestroyed = true; 7013 mWindow.destroy(); 7014 mFragments.dispatchDestroy(); 7015 onDestroy(); 7016 mFragments.doLoaderDestroy(); 7017 if (mVoiceInteractor != null) { 7018 mVoiceInteractor.detachActivity(); 7019 } 7020 } 7021 7022 final void dispatchMultiWindowModeChanged(boolean isInMultiWindowMode) { 7023 if (DEBUG_LIFECYCLE) Slog.v(TAG, 7024 "dispatchMultiWindowModeChanged " + this + ": " + isInMultiWindowMode); 7025 mFragments.dispatchMultiWindowModeChanged(isInMultiWindowMode); 7026 if (mWindow != null) { 7027 mWindow.onMultiWindowModeChanged(); 7028 } 7029 onMultiWindowModeChanged(isInMultiWindowMode); 7030 } 7031 7032 final void dispatchPictureInPictureModeChanged(boolean isInPictureInPictureMode) { 7033 if (DEBUG_LIFECYCLE) Slog.v(TAG, 7034 "dispatchPictureInPictureModeChanged " + this + ": " + isInPictureInPictureMode); 7035 mFragments.dispatchPictureInPictureModeChanged(isInPictureInPictureMode); 7036 onPictureInPictureModeChanged(isInPictureInPictureMode); 7037 } 7038 7039 /** 7040 * @hide 7041 */ 7042 public final boolean isResumed() { 7043 return mResumed; 7044 } 7045 7046 private void storeHasCurrentPermissionRequest(Bundle bundle) { 7047 if (bundle != null && mHasCurrentPermissionsRequest) { 7048 bundle.putBoolean(HAS_CURENT_PERMISSIONS_REQUEST_KEY, true); 7049 } 7050 } 7051 7052 private void restoreHasCurrentPermissionRequest(Bundle bundle) { 7053 if (bundle != null) { 7054 mHasCurrentPermissionsRequest = bundle.getBoolean( 7055 HAS_CURENT_PERMISSIONS_REQUEST_KEY, false); 7056 } 7057 } 7058 7059 void dispatchActivityResult(String who, int requestCode, 7060 int resultCode, Intent data) { 7061 if (false) Log.v( 7062 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 7063 + ", resCode=" + resultCode + ", data=" + data); 7064 mFragments.noteStateNotSaved(); 7065 if (who == null) { 7066 onActivityResult(requestCode, resultCode, data); 7067 } else if (who.startsWith(REQUEST_PERMISSIONS_WHO_PREFIX)) { 7068 who = who.substring(REQUEST_PERMISSIONS_WHO_PREFIX.length()); 7069 if (TextUtils.isEmpty(who)) { 7070 dispatchRequestPermissionsResult(requestCode, data); 7071 } else { 7072 Fragment frag = mFragments.findFragmentByWho(who); 7073 if (frag != null) { 7074 dispatchRequestPermissionsResultToFragment(requestCode, data, frag); 7075 } 7076 } 7077 } else if (who.startsWith("@android:view:")) { 7078 ArrayList<ViewRootImpl> views = WindowManagerGlobal.getInstance().getRootViews( 7079 getActivityToken()); 7080 for (ViewRootImpl viewRoot : views) { 7081 if (viewRoot.getView() != null 7082 && viewRoot.getView().dispatchActivityResult( 7083 who, requestCode, resultCode, data)) { 7084 return; 7085 } 7086 } 7087 } else { 7088 Fragment frag = mFragments.findFragmentByWho(who); 7089 if (frag != null) { 7090 frag.onActivityResult(requestCode, resultCode, data); 7091 } 7092 } 7093 } 7094 7095 /** 7096 * Request to put this Activity in a mode where the user is locked to the 7097 * current task. 7098 * 7099 * This will prevent the user from launching other apps, going to settings, or reaching the 7100 * home screen. This does not include those apps whose {@link android.R.attr#lockTaskMode} 7101 * values permit launching while locked. 7102 * 7103 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns true or 7104 * lockTaskMode=lockTaskModeAlways for this component then the app will go directly into 7105 * Lock Task mode. The user will not be able to exit this mode until 7106 * {@link Activity#stopLockTask()} is called. 7107 * 7108 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns false 7109 * then the system will prompt the user with a dialog requesting permission to enter 7110 * this mode. When entered through this method the user can exit at any time through 7111 * an action described by the request dialog. Calling stopLockTask will also exit the 7112 * mode. 7113 * 7114 * @see android.R.attr#lockTaskMode 7115 */ 7116 public void startLockTask() { 7117 try { 7118 ActivityManager.getService().startLockTaskModeByToken(mToken); 7119 } catch (RemoteException e) { 7120 } 7121 } 7122 7123 /** 7124 * Allow the user to switch away from the current task. 7125 * 7126 * Called to end the mode started by {@link Activity#startLockTask}. This 7127 * can only be called by activities that have successfully called 7128 * startLockTask previously. 7129 * 7130 * This will allow the user to exit this app and move onto other activities. 7131 * <p>Note: This method should only be called when the activity is user-facing. That is, 7132 * between onResume() and onPause(). 7133 * <p>Note: If there are other tasks below this one that are also locked then calling this 7134 * method will immediately finish this task and resume the previous locked one, remaining in 7135 * lockTask mode. 7136 * 7137 * @see android.R.attr#lockTaskMode 7138 * @see ActivityManager#getLockTaskModeState() 7139 */ 7140 public void stopLockTask() { 7141 try { 7142 ActivityManager.getService().stopLockTaskMode(); 7143 } catch (RemoteException e) { 7144 } 7145 } 7146 7147 /** 7148 * Shows the user the system defined message for telling the user how to exit 7149 * lock task mode. The task containing this activity must be in lock task mode at the time 7150 * of this call for the message to be displayed. 7151 */ 7152 public void showLockTaskEscapeMessage() { 7153 try { 7154 ActivityManager.getService().showLockTaskEscapeMessage(mToken); 7155 } catch (RemoteException e) { 7156 } 7157 } 7158 7159 /** 7160 * Check whether the caption on freeform windows is displayed directly on the content. 7161 * 7162 * @return True if caption is displayed on content, false if it pushes the content down. 7163 * 7164 * @see {@link #setOverlayWithDecorCaptionEnabled(boolean)} 7165 */ 7166 public boolean isOverlayWithDecorCaptionEnabled() { 7167 return mWindow.isOverlayWithDecorCaptionEnabled(); 7168 } 7169 7170 /** 7171 * Set whether the caption should displayed directly on the content rather than push it down. 7172 * 7173 * This affects only freeform windows since they display the caption and only the main 7174 * window of the activity. The caption is used to drag the window around and also shows 7175 * maximize and close action buttons. 7176 */ 7177 public void setOverlayWithDecorCaptionEnabled(boolean enabled) { 7178 mWindow.setOverlayWithDecorCaptionEnabled(enabled); 7179 } 7180 7181 /** 7182 * Interface for informing a translucent {@link Activity} once all visible activities below it 7183 * have completed drawing. This is necessary only after an {@link Activity} has been made 7184 * opaque using {@link Activity#convertFromTranslucent()} and before it has been drawn 7185 * translucent again following a call to {@link 7186 * Activity#convertToTranslucent(android.app.Activity.TranslucentConversionListener, 7187 * ActivityOptions)} 7188 * 7189 * @hide 7190 */ 7191 @SystemApi 7192 public interface TranslucentConversionListener { 7193 /** 7194 * Callback made following {@link Activity#convertToTranslucent} once all visible Activities 7195 * below the top one have been redrawn. Following this callback it is safe to make the top 7196 * Activity translucent because the underlying Activity has been drawn. 7197 * 7198 * @param drawComplete True if the background Activity has drawn itself. False if a timeout 7199 * occurred waiting for the Activity to complete drawing. 7200 * 7201 * @see Activity#convertFromTranslucent() 7202 * @see Activity#convertToTranslucent(TranslucentConversionListener, ActivityOptions) 7203 */ 7204 public void onTranslucentConversionComplete(boolean drawComplete); 7205 } 7206 7207 private void dispatchRequestPermissionsResult(int requestCode, Intent data) { 7208 mHasCurrentPermissionsRequest = false; 7209 // If the package installer crashed we may have not data - best effort. 7210 String[] permissions = (data != null) ? data.getStringArrayExtra( 7211 PackageManager.EXTRA_REQUEST_PERMISSIONS_NAMES) : new String[0]; 7212 final int[] grantResults = (data != null) ? data.getIntArrayExtra( 7213 PackageManager.EXTRA_REQUEST_PERMISSIONS_RESULTS) : new int[0]; 7214 onRequestPermissionsResult(requestCode, permissions, grantResults); 7215 } 7216 7217 private void dispatchRequestPermissionsResultToFragment(int requestCode, Intent data, 7218 Fragment fragment) { 7219 // If the package installer crashed we may have not data - best effort. 7220 String[] permissions = (data != null) ? data.getStringArrayExtra( 7221 PackageManager.EXTRA_REQUEST_PERMISSIONS_NAMES) : new String[0]; 7222 final int[] grantResults = (data != null) ? data.getIntArrayExtra( 7223 PackageManager.EXTRA_REQUEST_PERMISSIONS_RESULTS) : new int[0]; 7224 fragment.onRequestPermissionsResult(requestCode, permissions, grantResults); 7225 } 7226 7227 class HostCallbacks extends FragmentHostCallback<Activity> { 7228 public HostCallbacks() { 7229 super(Activity.this /*activity*/); 7230 } 7231 7232 @Override 7233 public void onDump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 7234 Activity.this.dump(prefix, fd, writer, args); 7235 } 7236 7237 @Override 7238 public boolean onShouldSaveFragmentState(Fragment fragment) { 7239 return !isFinishing(); 7240 } 7241 7242 @Override 7243 public LayoutInflater onGetLayoutInflater() { 7244 final LayoutInflater result = Activity.this.getLayoutInflater(); 7245 if (onUseFragmentManagerInflaterFactory()) { 7246 return result.cloneInContext(Activity.this); 7247 } 7248 return result; 7249 } 7250 7251 @Override 7252 public boolean onUseFragmentManagerInflaterFactory() { 7253 // Newer platform versions use the child fragment manager's LayoutInflaterFactory. 7254 return getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.LOLLIPOP; 7255 } 7256 7257 @Override 7258 public Activity onGetHost() { 7259 return Activity.this; 7260 } 7261 7262 @Override 7263 public void onInvalidateOptionsMenu() { 7264 Activity.this.invalidateOptionsMenu(); 7265 } 7266 7267 @Override 7268 public void onStartActivityFromFragment(Fragment fragment, Intent intent, int requestCode, 7269 Bundle options) { 7270 Activity.this.startActivityFromFragment(fragment, intent, requestCode, options); 7271 } 7272 7273 @Override 7274 public void onStartIntentSenderFromFragment(Fragment fragment, IntentSender intent, 7275 int requestCode, @Nullable Intent fillInIntent, int flagsMask, int flagsValues, 7276 int extraFlags, Bundle options) throws IntentSender.SendIntentException { 7277 if (mParent == null) { 7278 startIntentSenderForResultInner(intent, fragment.mWho, requestCode, fillInIntent, 7279 flagsMask, flagsValues, options); 7280 } else if (options != null) { 7281 mParent.startIntentSenderFromChildFragment(fragment, intent, requestCode, 7282 fillInIntent, flagsMask, flagsValues, extraFlags, options); 7283 } 7284 } 7285 7286 @Override 7287 public void onRequestPermissionsFromFragment(Fragment fragment, String[] permissions, 7288 int requestCode) { 7289 String who = REQUEST_PERMISSIONS_WHO_PREFIX + fragment.mWho; 7290 Intent intent = getPackageManager().buildRequestPermissionsIntent(permissions); 7291 startActivityForResult(who, intent, requestCode, null); 7292 } 7293 7294 @Override 7295 public boolean onHasWindowAnimations() { 7296 return getWindow() != null; 7297 } 7298 7299 @Override 7300 public int onGetWindowAnimations() { 7301 final Window w = getWindow(); 7302 return (w == null) ? 0 : w.getAttributes().windowAnimations; 7303 } 7304 7305 @Override 7306 public void onAttachFragment(Fragment fragment) { 7307 Activity.this.onAttachFragment(fragment); 7308 } 7309 7310 @Nullable 7311 @Override 7312 public View onFindViewById(int id) { 7313 return Activity.this.findViewById(id); 7314 } 7315 7316 @Override 7317 public boolean onHasView() { 7318 final Window w = getWindow(); 7319 return (w != null && w.peekDecorView() != null); 7320 } 7321 } 7322} 7323