Activity.java revision 04073dc5be4c8faad41f549617ed1c3ef999d6b2
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.app; 18 19import static java.lang.Character.MIN_VALUE; 20 21import android.annotation.CallSuper; 22import android.annotation.DrawableRes; 23import android.annotation.IdRes; 24import android.annotation.IntDef; 25import android.annotation.LayoutRes; 26import android.annotation.MainThread; 27import android.annotation.NonNull; 28import android.annotation.Nullable; 29import android.annotation.RequiresPermission; 30import android.annotation.StyleRes; 31import android.annotation.SystemApi; 32import android.app.VoiceInteractor.Request; 33import android.app.admin.DevicePolicyManager; 34import android.app.assist.AssistContent; 35import android.content.ComponentCallbacks2; 36import android.content.ComponentName; 37import android.content.ContentResolver; 38import android.content.Context; 39import android.content.CursorLoader; 40import android.content.IIntentSender; 41import android.content.Intent; 42import android.content.IntentSender; 43import android.content.SharedPreferences; 44import android.content.pm.ActivityInfo; 45import android.content.pm.ApplicationInfo; 46import android.content.pm.PackageManager; 47import android.content.pm.PackageManager.NameNotFoundException; 48import android.content.res.Configuration; 49import android.content.res.Resources; 50import android.content.res.TypedArray; 51import android.database.Cursor; 52import android.graphics.Bitmap; 53import android.graphics.Canvas; 54import android.graphics.Color; 55import android.graphics.drawable.Drawable; 56import android.hardware.input.InputManager; 57import android.media.AudioManager; 58import android.media.session.MediaController; 59import android.net.Uri; 60import android.os.Build; 61import android.os.Bundle; 62import android.os.Handler; 63import android.os.IBinder; 64import android.os.Looper; 65import android.os.Parcelable; 66import android.os.PersistableBundle; 67import android.os.RemoteException; 68import android.os.StrictMode; 69import android.os.SystemProperties; 70import android.os.UserHandle; 71import android.text.Selection; 72import android.text.SpannableStringBuilder; 73import android.text.TextUtils; 74import android.text.method.TextKeyListener; 75import android.transition.Scene; 76import android.transition.TransitionManager; 77import android.util.ArrayMap; 78import android.util.AttributeSet; 79import android.util.EventLog; 80import android.util.Log; 81import android.util.PrintWriterPrinter; 82import android.util.Slog; 83import android.util.SparseArray; 84import android.util.SuperNotCalledException; 85import android.view.ActionMode; 86import android.view.ContextMenu; 87import android.view.ContextMenu.ContextMenuInfo; 88import android.view.ContextThemeWrapper; 89import android.view.DragAndDropPermissions; 90import android.view.DragEvent; 91import android.view.InputDevice; 92import android.view.KeyCharacterMap; 93import android.view.KeyEvent; 94import android.view.KeyboardShortcutGroup; 95import android.view.KeyboardShortcutInfo; 96import android.view.LayoutInflater; 97import android.view.Menu; 98import android.view.MenuInflater; 99import android.view.MenuItem; 100import android.view.MotionEvent; 101import android.view.SearchEvent; 102import android.view.View; 103import android.view.View.OnCreateContextMenuListener; 104import android.view.ViewGroup; 105import android.view.ViewGroup.LayoutParams; 106import android.view.ViewManager; 107import android.view.ViewRootImpl; 108import android.view.Window; 109import android.view.Window.WindowControllerCallback; 110import android.view.WindowManager; 111import android.view.WindowManagerGlobal; 112import android.view.accessibility.AccessibilityEvent; 113import android.widget.AdapterView; 114import android.widget.Toast; 115import android.widget.Toolbar; 116 117import com.android.internal.app.IVoiceInteractor; 118import com.android.internal.app.ToolbarActionBar; 119import com.android.internal.app.WindowDecorActionBar; 120import com.android.internal.policy.PhoneWindow; 121 122import java.io.FileDescriptor; 123import java.io.PrintWriter; 124import java.lang.annotation.Retention; 125import java.lang.annotation.RetentionPolicy; 126import java.util.ArrayList; 127import java.util.HashMap; 128import java.util.List; 129 130/** 131 * An activity is a single, focused thing that the user can do. Almost all 132 * activities interact with the user, so the Activity class takes care of 133 * creating a window for you in which you can place your UI with 134 * {@link #setContentView}. While activities are often presented to the user 135 * as full-screen windows, they can also be used in other ways: as floating 136 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 137 * or embedded inside of another activity (using {@link ActivityGroup}). 138 * 139 * There are two methods almost all subclasses of Activity will implement: 140 * 141 * <ul> 142 * <li> {@link #onCreate} is where you initialize your activity. Most 143 * importantly, here you will usually call {@link #setContentView(int)} 144 * with a layout resource defining your UI, and using {@link #findViewById} 145 * to retrieve the widgets in that UI that you need to interact with 146 * programmatically. 147 * 148 * <li> {@link #onPause} is where you deal with the user leaving your 149 * activity. Most importantly, any changes made by the user should at this 150 * point be committed (usually to the 151 * {@link android.content.ContentProvider} holding the data). 152 * </ul> 153 * 154 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 155 * activity classes must have a corresponding 156 * {@link android.R.styleable#AndroidManifestActivity <activity>} 157 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 158 * 159 * <p>Topics covered here: 160 * <ol> 161 * <li><a href="#Fragments">Fragments</a> 162 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 163 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 164 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 165 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 166 * <li><a href="#Permissions">Permissions</a> 167 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 168 * </ol> 169 * 170 * <div class="special reference"> 171 * <h3>Developer Guides</h3> 172 * <p>The Activity class is an important part of an application's overall lifecycle, 173 * and the way activities are launched and put together is a fundamental 174 * part of the platform's application model. For a detailed perspective on the structure of an 175 * Android application and how activities behave, please read the 176 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 177 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 178 * developer guides.</p> 179 * 180 * <p>You can also find a detailed discussion about how to create activities in the 181 * <a href="{@docRoot}guide/topics/fundamentals/activities.html">Activities</a> 182 * developer guide.</p> 183 * </div> 184 * 185 * <a name="Fragments"></a> 186 * <h3>Fragments</h3> 187 * 188 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 189 * implementations can make use of the {@link Fragment} class to better 190 * modularize their code, build more sophisticated user interfaces for larger 191 * screens, and help scale their application between small and large screens. 192 * 193 * <a name="ActivityLifecycle"></a> 194 * <h3>Activity Lifecycle</h3> 195 * 196 * <p>Activities in the system are managed as an <em>activity stack</em>. 197 * When a new activity is started, it is placed on the top of the stack 198 * and becomes the running activity -- the previous activity always remains 199 * below it in the stack, and will not come to the foreground again until 200 * the new activity exits.</p> 201 * 202 * <p>An activity has essentially four states:</p> 203 * <ul> 204 * <li> If an activity is in the foreground of the screen (at the top of 205 * the stack), 206 * it is <em>active</em> or <em>running</em>. </li> 207 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 208 * or transparent activity has focus on top of your activity), it 209 * is <em>paused</em>. A paused activity is completely alive (it 210 * maintains all state and member information and remains attached to 211 * the window manager), but can be killed by the system in extreme 212 * low memory situations. 213 * <li>If an activity is completely obscured by another activity, 214 * it is <em>stopped</em>. It still retains all state and member information, 215 * however, it is no longer visible to the user so its window is hidden 216 * and it will often be killed by the system when memory is needed 217 * elsewhere.</li> 218 * <li>If an activity is paused or stopped, the system can drop the activity 219 * from memory by either asking it to finish, or simply killing its 220 * process. When it is displayed again to the user, it must be 221 * completely restarted and restored to its previous state.</li> 222 * </ul> 223 * 224 * <p>The following diagram shows the important state paths of an Activity. 225 * The square rectangles represent callback methods you can implement to 226 * perform operations when the Activity moves between states. The colored 227 * ovals are major states the Activity can be in.</p> 228 * 229 * <p><img src="../../../images/activity_lifecycle.png" 230 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 231 * 232 * <p>There are three key loops you may be interested in monitoring within your 233 * activity: 234 * 235 * <ul> 236 * <li>The <b>entire lifetime</b> of an activity happens between the first call 237 * to {@link android.app.Activity#onCreate} through to a single final call 238 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 239 * of "global" state in onCreate(), and release all remaining resources in 240 * onDestroy(). For example, if it has a thread running in the background 241 * to download data from the network, it may create that thread in onCreate() 242 * and then stop the thread in onDestroy(). 243 * 244 * <li>The <b>visible lifetime</b> of an activity happens between a call to 245 * {@link android.app.Activity#onStart} until a corresponding call to 246 * {@link android.app.Activity#onStop}. During this time the user can see the 247 * activity on-screen, though it may not be in the foreground and interacting 248 * with the user. Between these two methods you can maintain resources that 249 * are needed to show the activity to the user. For example, you can register 250 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 251 * that impact your UI, and unregister it in onStop() when the user no 252 * longer sees what you are displaying. The onStart() and onStop() methods 253 * can be called multiple times, as the activity becomes visible and hidden 254 * to the user. 255 * 256 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 257 * {@link android.app.Activity#onResume} until a corresponding call to 258 * {@link android.app.Activity#onPause}. During this time the activity is 259 * in front of all other activities and interacting with the user. An activity 260 * can frequently go between the resumed and paused states -- for example when 261 * the device goes to sleep, when an activity result is delivered, when a new 262 * intent is delivered -- so the code in these methods should be fairly 263 * lightweight. 264 * </ul> 265 * 266 * <p>The entire lifecycle of an activity is defined by the following 267 * Activity methods. All of these are hooks that you can override 268 * to do appropriate work when the activity changes state. All 269 * activities will implement {@link android.app.Activity#onCreate} 270 * to do their initial setup; many will also implement 271 * {@link android.app.Activity#onPause} to commit changes to data and 272 * otherwise prepare to stop interacting with the user. You should always 273 * call up to your superclass when implementing these methods.</p> 274 * 275 * </p> 276 * <pre class="prettyprint"> 277 * public class Activity extends ApplicationContext { 278 * protected void onCreate(Bundle savedInstanceState); 279 * 280 * protected void onStart(); 281 * 282 * protected void onRestart(); 283 * 284 * protected void onResume(); 285 * 286 * protected void onPause(); 287 * 288 * protected void onStop(); 289 * 290 * protected void onDestroy(); 291 * } 292 * </pre> 293 * 294 * <p>In general the movement through an activity's lifecycle looks like 295 * this:</p> 296 * 297 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 298 * <colgroup align="left" span="3" /> 299 * <colgroup align="left" /> 300 * <colgroup align="center" /> 301 * <colgroup align="center" /> 302 * 303 * <thead> 304 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 305 * </thead> 306 * 307 * <tbody> 308 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 309 * <td>Called when the activity is first created. 310 * This is where you should do all of your normal static set up: 311 * create views, bind data to lists, etc. This method also 312 * provides you with a Bundle containing the activity's previously 313 * frozen state, if there was one. 314 * <p>Always followed by <code>onStart()</code>.</td> 315 * <td align="center">No</td> 316 * <td align="center"><code>onStart()</code></td> 317 * </tr> 318 * 319 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 320 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 321 * <td>Called after your activity has been stopped, prior to it being 322 * started again. 323 * <p>Always followed by <code>onStart()</code></td> 324 * <td align="center">No</td> 325 * <td align="center"><code>onStart()</code></td> 326 * </tr> 327 * 328 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 329 * <td>Called when the activity is becoming visible to the user. 330 * <p>Followed by <code>onResume()</code> if the activity comes 331 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 332 * <td align="center">No</td> 333 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 334 * </tr> 335 * 336 * <tr><td rowspan="2" style="border-left: none;"> </td> 337 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 338 * <td>Called when the activity will start 339 * interacting with the user. At this point your activity is at 340 * the top of the activity stack, with user input going to it. 341 * <p>Always followed by <code>onPause()</code>.</td> 342 * <td align="center">No</td> 343 * <td align="center"><code>onPause()</code></td> 344 * </tr> 345 * 346 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 347 * <td>Called when the system is about to start resuming a previous 348 * activity. This is typically used to commit unsaved changes to 349 * persistent data, stop animations and other things that may be consuming 350 * CPU, etc. Implementations of this method must be very quick because 351 * the next activity will not be resumed until this method returns. 352 * <p>Followed by either <code>onResume()</code> if the activity 353 * returns back to the front, or <code>onStop()</code> if it becomes 354 * invisible to the user.</td> 355 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 356 * <td align="center"><code>onResume()</code> or<br> 357 * <code>onStop()</code></td> 358 * </tr> 359 * 360 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 361 * <td>Called when the activity is no longer visible to the user, because 362 * another activity has been resumed and is covering this one. This 363 * may happen either because a new activity is being started, an existing 364 * one is being brought in front of this one, or this one is being 365 * destroyed. 366 * <p>Followed by either <code>onRestart()</code> if 367 * this activity is coming back to interact with the user, or 368 * <code>onDestroy()</code> if this activity is going away.</td> 369 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 370 * <td align="center"><code>onRestart()</code> or<br> 371 * <code>onDestroy()</code></td> 372 * </tr> 373 * 374 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 375 * <td>The final call you receive before your 376 * activity is destroyed. This can happen either because the 377 * activity is finishing (someone called {@link Activity#finish} on 378 * it, or because the system is temporarily destroying this 379 * instance of the activity to save space. You can distinguish 380 * between these two scenarios with the {@link 381 * Activity#isFinishing} method.</td> 382 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 383 * <td align="center"><em>nothing</em></td> 384 * </tr> 385 * </tbody> 386 * </table> 387 * 388 * <p>Note the "Killable" column in the above table -- for those methods that 389 * are marked as being killable, after that method returns the process hosting the 390 * activity may be killed by the system <em>at any time</em> without another line 391 * of its code being executed. Because of this, you should use the 392 * {@link #onPause} method to write any persistent data (such as user edits) 393 * to storage. In addition, the method 394 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 395 * in such a background state, allowing you to save away any dynamic instance 396 * state in your activity into the given Bundle, to be later received in 397 * {@link #onCreate} if the activity needs to be re-created. 398 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 399 * section for more information on how the lifecycle of a process is tied 400 * to the activities it is hosting. Note that it is important to save 401 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 402 * because the latter is not part of the lifecycle callbacks, so will not 403 * be called in every situation as described in its documentation.</p> 404 * 405 * <p class="note">Be aware that these semantics will change slightly between 406 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 407 * vs. those targeting prior platforms. Starting with Honeycomb, an application 408 * is not in the killable state until its {@link #onStop} has returned. This 409 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 410 * safely called after {@link #onPause()} and allows and application to safely 411 * wait until {@link #onStop()} to save persistent state.</p> 412 * 413 * <p>For those methods that are not marked as being killable, the activity's 414 * process will not be killed by the system starting from the time the method 415 * is called and continuing after it returns. Thus an activity is in the killable 416 * state, for example, between after <code>onPause()</code> to the start of 417 * <code>onResume()</code>.</p> 418 * 419 * <a name="ConfigurationChanges"></a> 420 * <h3>Configuration Changes</h3> 421 * 422 * <p>If the configuration of the device (as defined by the 423 * {@link Configuration Resources.Configuration} class) changes, 424 * then anything displaying a user interface will need to update to match that 425 * configuration. Because Activity is the primary mechanism for interacting 426 * with the user, it includes special support for handling configuration 427 * changes.</p> 428 * 429 * <p>Unless you specify otherwise, a configuration change (such as a change 430 * in screen orientation, language, input devices, etc) will cause your 431 * current activity to be <em>destroyed</em>, going through the normal activity 432 * lifecycle process of {@link #onPause}, 433 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 434 * had been in the foreground or visible to the user, once {@link #onDestroy} is 435 * called in that instance then a new instance of the activity will be 436 * created, with whatever savedInstanceState the previous instance had generated 437 * from {@link #onSaveInstanceState}.</p> 438 * 439 * <p>This is done because any application resource, 440 * including layout files, can change based on any configuration value. Thus 441 * the only safe way to handle a configuration change is to re-retrieve all 442 * resources, including layouts, drawables, and strings. Because activities 443 * must already know how to save their state and re-create themselves from 444 * that state, this is a convenient way to have an activity restart itself 445 * with a new configuration.</p> 446 * 447 * <p>In some special cases, you may want to bypass restarting of your 448 * activity based on one or more types of configuration changes. This is 449 * done with the {@link android.R.attr#configChanges android:configChanges} 450 * attribute in its manifest. For any types of configuration changes you say 451 * that you handle there, you will receive a call to your current activity's 452 * {@link #onConfigurationChanged} method instead of being restarted. If 453 * a configuration change involves any that you do not handle, however, the 454 * activity will still be restarted and {@link #onConfigurationChanged} 455 * will not be called.</p> 456 * 457 * <a name="StartingActivities"></a> 458 * <h3>Starting Activities and Getting Results</h3> 459 * 460 * <p>The {@link android.app.Activity#startActivity} 461 * method is used to start a 462 * new activity, which will be placed at the top of the activity stack. It 463 * takes a single argument, an {@link android.content.Intent Intent}, 464 * which describes the activity 465 * to be executed.</p> 466 * 467 * <p>Sometimes you want to get a result back from an activity when it 468 * ends. For example, you may start an activity that lets the user pick 469 * a person in a list of contacts; when it ends, it returns the person 470 * that was selected. To do this, you call the 471 * {@link android.app.Activity#startActivityForResult(Intent, int)} 472 * version with a second integer parameter identifying the call. The result 473 * will come back through your {@link android.app.Activity#onActivityResult} 474 * method.</p> 475 * 476 * <p>When an activity exits, it can call 477 * {@link android.app.Activity#setResult(int)} 478 * to return data back to its parent. It must always supply a result code, 479 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 480 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 481 * return back an Intent containing any additional data it wants. All of this 482 * information appears back on the 483 * parent's <code>Activity.onActivityResult()</code>, along with the integer 484 * identifier it originally supplied.</p> 485 * 486 * <p>If a child activity fails for any reason (such as crashing), the parent 487 * activity will receive a result with the code RESULT_CANCELED.</p> 488 * 489 * <pre class="prettyprint"> 490 * public class MyActivity extends Activity { 491 * ... 492 * 493 * static final int PICK_CONTACT_REQUEST = 0; 494 * 495 * public boolean onKeyDown(int keyCode, KeyEvent event) { 496 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 497 * // When the user center presses, let them pick a contact. 498 * startActivityForResult( 499 * new Intent(Intent.ACTION_PICK, 500 * new Uri("content://contacts")), 501 * PICK_CONTACT_REQUEST); 502 * return true; 503 * } 504 * return false; 505 * } 506 * 507 * protected void onActivityResult(int requestCode, int resultCode, 508 * Intent data) { 509 * if (requestCode == PICK_CONTACT_REQUEST) { 510 * if (resultCode == RESULT_OK) { 511 * // A contact was picked. Here we will just display it 512 * // to the user. 513 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 514 * } 515 * } 516 * } 517 * } 518 * </pre> 519 * 520 * <a name="SavingPersistentState"></a> 521 * <h3>Saving Persistent State</h3> 522 * 523 * <p>There are generally two kinds of persistent state than an activity 524 * will deal with: shared document-like data (typically stored in a SQLite 525 * database using a {@linkplain android.content.ContentProvider content provider}) 526 * and internal state such as user preferences.</p> 527 * 528 * <p>For content provider data, we suggest that activities use a 529 * "edit in place" user model. That is, any edits a user makes are effectively 530 * made immediately without requiring an additional confirmation step. 531 * Supporting this model is generally a simple matter of following two rules:</p> 532 * 533 * <ul> 534 * <li> <p>When creating a new document, the backing database entry or file for 535 * it is created immediately. For example, if the user chooses to write 536 * a new e-mail, a new entry for that e-mail is created as soon as they 537 * start entering data, so that if they go to any other activity after 538 * that point this e-mail will now appear in the list of drafts.</p> 539 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 540 * commit to the backing content provider or file any changes the user 541 * has made. This ensures that those changes will be seen by any other 542 * activity that is about to run. You will probably want to commit 543 * your data even more aggressively at key times during your 544 * activity's lifecycle: for example before starting a new 545 * activity, before finishing your own activity, when the user 546 * switches between input fields, etc.</p> 547 * </ul> 548 * 549 * <p>This model is designed to prevent data loss when a user is navigating 550 * between activities, and allows the system to safely kill an activity (because 551 * system resources are needed somewhere else) at any time after it has been 552 * paused. Note this implies 553 * that the user pressing BACK from your activity does <em>not</em> 554 * mean "cancel" -- it means to leave the activity with its current contents 555 * saved away. Canceling edits in an activity must be provided through 556 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 557 * 558 * <p>See the {@linkplain android.content.ContentProvider content package} for 559 * more information about content providers. These are a key aspect of how 560 * different activities invoke and propagate data between themselves.</p> 561 * 562 * <p>The Activity class also provides an API for managing internal persistent state 563 * associated with an activity. This can be used, for example, to remember 564 * the user's preferred initial display in a calendar (day view or week view) 565 * or the user's default home page in a web browser.</p> 566 * 567 * <p>Activity persistent state is managed 568 * with the method {@link #getPreferences}, 569 * allowing you to retrieve and 570 * modify a set of name/value pairs associated with the activity. To use 571 * preferences that are shared across multiple application components 572 * (activities, receivers, services, providers), you can use the underlying 573 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 574 * to retrieve a preferences 575 * object stored under a specific name. 576 * (Note that it is not possible to share settings data across application 577 * packages -- for that you will need a content provider.)</p> 578 * 579 * <p>Here is an excerpt from a calendar activity that stores the user's 580 * preferred view mode in its persistent settings:</p> 581 * 582 * <pre class="prettyprint"> 583 * public class CalendarActivity extends Activity { 584 * ... 585 * 586 * static final int DAY_VIEW_MODE = 0; 587 * static final int WEEK_VIEW_MODE = 1; 588 * 589 * private SharedPreferences mPrefs; 590 * private int mCurViewMode; 591 * 592 * protected void onCreate(Bundle savedInstanceState) { 593 * super.onCreate(savedInstanceState); 594 * 595 * SharedPreferences mPrefs = getSharedPreferences(); 596 * mCurViewMode = mPrefs.getInt("view_mode", DAY_VIEW_MODE); 597 * } 598 * 599 * protected void onPause() { 600 * super.onPause(); 601 * 602 * SharedPreferences.Editor ed = mPrefs.edit(); 603 * ed.putInt("view_mode", mCurViewMode); 604 * ed.commit(); 605 * } 606 * } 607 * </pre> 608 * 609 * <a name="Permissions"></a> 610 * <h3>Permissions</h3> 611 * 612 * <p>The ability to start a particular Activity can be enforced when it is 613 * declared in its 614 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 615 * tag. By doing so, other applications will need to declare a corresponding 616 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 617 * element in their own manifest to be able to start that activity. 618 * 619 * <p>When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 620 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 621 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the 622 * Activity access to the specific URIs in the Intent. Access will remain 623 * until the Activity has finished (it will remain across the hosting 624 * process being killed and other temporary destruction). As of 625 * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity 626 * was already created and a new Intent is being delivered to 627 * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added 628 * to the existing ones it holds. 629 * 630 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 631 * document for more information on permissions and security in general. 632 * 633 * <a name="ProcessLifecycle"></a> 634 * <h3>Process Lifecycle</h3> 635 * 636 * <p>The Android system attempts to keep application process around for as 637 * long as possible, but eventually will need to remove old processes when 638 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 639 * Lifecycle</a>, the decision about which process to remove is intimately 640 * tied to the state of the user's interaction with it. In general, there 641 * are four states a process can be in based on the activities running in it, 642 * listed here in order of importance. The system will kill less important 643 * processes (the last ones) before it resorts to killing more important 644 * processes (the first ones). 645 * 646 * <ol> 647 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 648 * that the user is currently interacting with) is considered the most important. 649 * Its process will only be killed as a last resort, if it uses more memory 650 * than is available on the device. Generally at this point the device has 651 * reached a memory paging state, so this is required in order to keep the user 652 * interface responsive. 653 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 654 * but not in the foreground, such as one sitting behind a foreground dialog) 655 * is considered extremely important and will not be killed unless that is 656 * required to keep the foreground activity running. 657 * <li> <p>A <b>background activity</b> (an activity that is not visible to 658 * the user and has been paused) is no longer critical, so the system may 659 * safely kill its process to reclaim memory for other foreground or 660 * visible processes. If its process needs to be killed, when the user navigates 661 * back to the activity (making it visible on the screen again), its 662 * {@link #onCreate} method will be called with the savedInstanceState it had previously 663 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 664 * state as the user last left it. 665 * <li> <p>An <b>empty process</b> is one hosting no activities or other 666 * application components (such as {@link Service} or 667 * {@link android.content.BroadcastReceiver} classes). These are killed very 668 * quickly by the system as memory becomes low. For this reason, any 669 * background operation you do outside of an activity must be executed in the 670 * context of an activity BroadcastReceiver or Service to ensure that the system 671 * knows it needs to keep your process around. 672 * </ol> 673 * 674 * <p>Sometimes an Activity may need to do a long-running operation that exists 675 * independently of the activity lifecycle itself. An example may be a camera 676 * application that allows you to upload a picture to a web site. The upload 677 * may take a long time, and the application should allow the user to leave 678 * the application while it is executing. To accomplish this, your Activity 679 * should start a {@link Service} in which the upload takes place. This allows 680 * the system to properly prioritize your process (considering it to be more 681 * important than other non-visible applications) for the duration of the 682 * upload, independent of whether the original activity is paused, stopped, 683 * or finished. 684 */ 685public class Activity extends ContextThemeWrapper 686 implements LayoutInflater.Factory2, 687 Window.Callback, KeyEvent.Callback, 688 OnCreateContextMenuListener, ComponentCallbacks2, 689 Window.OnWindowDismissedCallback, WindowControllerCallback { 690 private static final String TAG = "Activity"; 691 private static final boolean DEBUG_LIFECYCLE = false; 692 693 /** Standard activity result: operation canceled. */ 694 public static final int RESULT_CANCELED = 0; 695 /** Standard activity result: operation succeeded. */ 696 public static final int RESULT_OK = -1; 697 /** Start of user-defined activity results. */ 698 public static final int RESULT_FIRST_USER = 1; 699 700 /** @hide Task isn't finished when activity is finished */ 701 public static final int DONT_FINISH_TASK_WITH_ACTIVITY = 0; 702 /** 703 * @hide Task is finished if the finishing activity is the root of the task. To preserve the 704 * past behavior the task is also removed from recents. 705 */ 706 public static final int FINISH_TASK_WITH_ROOT_ACTIVITY = 1; 707 /** 708 * @hide Task is finished along with the finishing activity, but it is not removed from 709 * recents. 710 */ 711 public static final int FINISH_TASK_WITH_ACTIVITY = 2; 712 713 static final String FRAGMENTS_TAG = "android:fragments"; 714 715 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 716 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 717 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 718 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 719 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 720 private static final String HAS_CURENT_PERMISSIONS_REQUEST_KEY = 721 "android:hasCurrentPermissionsRequest"; 722 723 private static final String REQUEST_PERMISSIONS_WHO_PREFIX = "@android:requestPermissions:"; 724 725 private static final String KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME = "com.android.systemui"; 726 private static final String KEYBOARD_SHORTCUTS_RECEIVER_CLASS_NAME = 727 "com.android.systemui.statusbar.KeyboardShortcutsReceiver"; 728 729 private static class ManagedDialog { 730 Dialog mDialog; 731 Bundle mArgs; 732 } 733 private SparseArray<ManagedDialog> mManagedDialogs; 734 735 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 736 private Instrumentation mInstrumentation; 737 private IBinder mToken; 738 private int mIdent; 739 /*package*/ String mEmbeddedID; 740 private Application mApplication; 741 /*package*/ Intent mIntent; 742 /*package*/ String mReferrer; 743 private ComponentName mComponent; 744 /*package*/ ActivityInfo mActivityInfo; 745 /*package*/ ActivityThread mMainThread; 746 Activity mParent; 747 boolean mCalled; 748 /*package*/ boolean mResumed; 749 /*package*/ boolean mStopped; 750 boolean mFinished; 751 boolean mStartedActivity; 752 private boolean mDestroyed; 753 private boolean mDoReportFullyDrawn = true; 754 /** true if the activity is going through a transient pause */ 755 /*package*/ boolean mTemporaryPause = false; 756 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 757 /*package*/ boolean mChangingConfigurations = false; 758 /*package*/ int mConfigChangeFlags; 759 /*package*/ Configuration mCurrentConfig; 760 private SearchManager mSearchManager; 761 private MenuInflater mMenuInflater; 762 763 static final class NonConfigurationInstances { 764 Object activity; 765 HashMap<String, Object> children; 766 FragmentManagerNonConfig fragments; 767 ArrayMap<String, LoaderManager> loaders; 768 VoiceInteractor voiceInteractor; 769 } 770 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 771 772 private Window mWindow; 773 774 private WindowManager mWindowManager; 775 /*package*/ View mDecor = null; 776 /*package*/ boolean mWindowAdded = false; 777 /*package*/ boolean mVisibleFromServer = false; 778 /*package*/ boolean mVisibleFromClient = true; 779 /*package*/ ActionBar mActionBar = null; 780 private boolean mEnableDefaultActionBarUp; 781 782 private VoiceInteractor mVoiceInteractor; 783 784 private CharSequence mTitle; 785 private int mTitleColor = 0; 786 787 // we must have a handler before the FragmentController is constructed 788 final Handler mHandler = new Handler(); 789 final FragmentController mFragments = FragmentController.createController(new HostCallbacks()); 790 791 // Most recent call to requestVisibleBehind(). 792 boolean mVisibleBehind; 793 794 private static final class ManagedCursor { 795 ManagedCursor(Cursor cursor) { 796 mCursor = cursor; 797 mReleased = false; 798 mUpdated = false; 799 } 800 801 private final Cursor mCursor; 802 private boolean mReleased; 803 private boolean mUpdated; 804 } 805 private final ArrayList<ManagedCursor> mManagedCursors = 806 new ArrayList<ManagedCursor>(); 807 808 // protected by synchronized (this) 809 int mResultCode = RESULT_CANCELED; 810 Intent mResultData = null; 811 812 private TranslucentConversionListener mTranslucentCallback; 813 private boolean mChangeCanvasToTranslucent; 814 815 private SearchEvent mSearchEvent; 816 817 private boolean mTitleReady = false; 818 private int mActionModeTypeStarting = ActionMode.TYPE_PRIMARY; 819 820 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 821 private SpannableStringBuilder mDefaultKeySsb = null; 822 823 private ActivityManager.TaskDescription mTaskDescription = 824 new ActivityManager.TaskDescription(); 825 826 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 827 828 @SuppressWarnings("unused") 829 private final Object mInstanceTracker = StrictMode.trackActivity(this); 830 831 private Thread mUiThread; 832 833 ActivityTransitionState mActivityTransitionState = new ActivityTransitionState(); 834 SharedElementCallback mEnterTransitionListener = SharedElementCallback.NULL_CALLBACK; 835 SharedElementCallback mExitTransitionListener = SharedElementCallback.NULL_CALLBACK; 836 837 private boolean mHasCurrentPermissionsRequest; 838 private boolean mEatKeyUpEvent; 839 840 private static native String getDlWarning(); 841 842 /** Return the intent that started this activity. */ 843 public Intent getIntent() { 844 return mIntent; 845 } 846 847 /** 848 * Change the intent returned by {@link #getIntent}. This holds a 849 * reference to the given intent; it does not copy it. Often used in 850 * conjunction with {@link #onNewIntent}. 851 * 852 * @param newIntent The new Intent object to return from getIntent 853 * 854 * @see #getIntent 855 * @see #onNewIntent 856 */ 857 public void setIntent(Intent newIntent) { 858 mIntent = newIntent; 859 } 860 861 /** Return the application that owns this activity. */ 862 public final Application getApplication() { 863 return mApplication; 864 } 865 866 /** Is this activity embedded inside of another activity? */ 867 public final boolean isChild() { 868 return mParent != null; 869 } 870 871 /** Return the parent activity if this view is an embedded child. */ 872 public final Activity getParent() { 873 return mParent; 874 } 875 876 /** Retrieve the window manager for showing custom windows. */ 877 public WindowManager getWindowManager() { 878 return mWindowManager; 879 } 880 881 /** 882 * Retrieve the current {@link android.view.Window} for the activity. 883 * This can be used to directly access parts of the Window API that 884 * are not available through Activity/Screen. 885 * 886 * @return Window The current window, or null if the activity is not 887 * visual. 888 */ 889 public Window getWindow() { 890 return mWindow; 891 } 892 893 /** 894 * Return the LoaderManager for this activity, creating it if needed. 895 */ 896 public LoaderManager getLoaderManager() { 897 return mFragments.getLoaderManager(); 898 } 899 900 /** 901 * Calls {@link android.view.Window#getCurrentFocus} on the 902 * Window of this Activity to return the currently focused view. 903 * 904 * @return View The current View with focus or null. 905 * 906 * @see #getWindow 907 * @see android.view.Window#getCurrentFocus 908 */ 909 @Nullable 910 public View getCurrentFocus() { 911 return mWindow != null ? mWindow.getCurrentFocus() : null; 912 } 913 914 /** 915 * Called when the activity is starting. This is where most initialization 916 * should go: calling {@link #setContentView(int)} to inflate the 917 * activity's UI, using {@link #findViewById} to programmatically interact 918 * with widgets in the UI, calling 919 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 920 * cursors for data being displayed, etc. 921 * 922 * <p>You can call {@link #finish} from within this function, in 923 * which case onDestroy() will be immediately called without any of the rest 924 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 925 * {@link #onPause}, etc) executing. 926 * 927 * <p><em>Derived classes must call through to the super class's 928 * implementation of this method. If they do not, an exception will be 929 * thrown.</em></p> 930 * 931 * @param savedInstanceState If the activity is being re-initialized after 932 * previously being shut down then this Bundle contains the data it most 933 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 934 * 935 * @see #onStart 936 * @see #onSaveInstanceState 937 * @see #onRestoreInstanceState 938 * @see #onPostCreate 939 */ 940 @MainThread 941 @CallSuper 942 protected void onCreate(@Nullable Bundle savedInstanceState) { 943 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState); 944 if (mLastNonConfigurationInstances != null) { 945 mFragments.restoreLoaderNonConfig(mLastNonConfigurationInstances.loaders); 946 } 947 if (mActivityInfo.parentActivityName != null) { 948 if (mActionBar == null) { 949 mEnableDefaultActionBarUp = true; 950 } else { 951 mActionBar.setDefaultDisplayHomeAsUpEnabled(true); 952 } 953 } 954 if (savedInstanceState != null) { 955 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 956 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 957 ? mLastNonConfigurationInstances.fragments : null); 958 } 959 mFragments.dispatchCreate(); 960 getApplication().dispatchActivityCreated(this, savedInstanceState); 961 if (mVoiceInteractor != null) { 962 mVoiceInteractor.attachActivity(this); 963 } 964 mCalled = true; 965 } 966 967 /** 968 * Same as {@link #onCreate(android.os.Bundle)} but called for those activities created with 969 * the attribute {@link android.R.attr#persistableMode} set to 970 * <code>persistAcrossReboots</code>. 971 * 972 * @param savedInstanceState if the activity is being re-initialized after 973 * previously being shut down then this Bundle contains the data it most 974 * recently supplied in {@link #onSaveInstanceState}. 975 * <b><i>Note: Otherwise it is null.</i></b> 976 * @param persistentState if the activity is being re-initialized after 977 * previously being shut down or powered off then this Bundle contains the data it most 978 * recently supplied to outPersistentState in {@link #onSaveInstanceState}. 979 * <b><i>Note: Otherwise it is null.</i></b> 980 * 981 * @see #onCreate(android.os.Bundle) 982 * @see #onStart 983 * @see #onSaveInstanceState 984 * @see #onRestoreInstanceState 985 * @see #onPostCreate 986 */ 987 public void onCreate(@Nullable Bundle savedInstanceState, 988 @Nullable PersistableBundle persistentState) { 989 onCreate(savedInstanceState); 990 } 991 992 /** 993 * The hook for {@link ActivityThread} to restore the state of this activity. 994 * 995 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 996 * {@link #restoreManagedDialogs(android.os.Bundle)}. 997 * 998 * @param savedInstanceState contains the saved state 999 */ 1000 final void performRestoreInstanceState(Bundle savedInstanceState) { 1001 onRestoreInstanceState(savedInstanceState); 1002 restoreManagedDialogs(savedInstanceState); 1003 } 1004 1005 /** 1006 * The hook for {@link ActivityThread} to restore the state of this activity. 1007 * 1008 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 1009 * {@link #restoreManagedDialogs(android.os.Bundle)}. 1010 * 1011 * @param savedInstanceState contains the saved state 1012 * @param persistentState contains the persistable saved state 1013 */ 1014 final void performRestoreInstanceState(Bundle savedInstanceState, 1015 PersistableBundle persistentState) { 1016 onRestoreInstanceState(savedInstanceState, persistentState); 1017 if (savedInstanceState != null) { 1018 restoreManagedDialogs(savedInstanceState); 1019 } 1020 } 1021 1022 /** 1023 * This method is called after {@link #onStart} when the activity is 1024 * being re-initialized from a previously saved state, given here in 1025 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 1026 * to restore their state, but it is sometimes convenient to do it here 1027 * after all of the initialization has been done or to allow subclasses to 1028 * decide whether to use your default implementation. The default 1029 * implementation of this method performs a restore of any view state that 1030 * had previously been frozen by {@link #onSaveInstanceState}. 1031 * 1032 * <p>This method is called between {@link #onStart} and 1033 * {@link #onPostCreate}. 1034 * 1035 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1036 * 1037 * @see #onCreate 1038 * @see #onPostCreate 1039 * @see #onResume 1040 * @see #onSaveInstanceState 1041 */ 1042 protected void onRestoreInstanceState(Bundle savedInstanceState) { 1043 if (mWindow != null) { 1044 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 1045 if (windowState != null) { 1046 mWindow.restoreHierarchyState(windowState); 1047 } 1048 } 1049 } 1050 1051 /** 1052 * This is the same as {@link #onRestoreInstanceState(Bundle)} but is called for activities 1053 * created with the attribute {@link android.R.attr#persistableMode} set to 1054 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1055 * came from the restored PersistableBundle first 1056 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1057 * 1058 * <p>This method is called between {@link #onStart} and 1059 * {@link #onPostCreate}. 1060 * 1061 * <p>If this method is called {@link #onRestoreInstanceState(Bundle)} will not be called. 1062 * 1063 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1064 * @param persistentState the data most recently supplied in {@link #onSaveInstanceState}. 1065 * 1066 * @see #onRestoreInstanceState(Bundle) 1067 * @see #onCreate 1068 * @see #onPostCreate 1069 * @see #onResume 1070 * @see #onSaveInstanceState 1071 */ 1072 public void onRestoreInstanceState(Bundle savedInstanceState, 1073 PersistableBundle persistentState) { 1074 if (savedInstanceState != null) { 1075 onRestoreInstanceState(savedInstanceState); 1076 } 1077 } 1078 1079 /** 1080 * Restore the state of any saved managed dialogs. 1081 * 1082 * @param savedInstanceState The bundle to restore from. 1083 */ 1084 private void restoreManagedDialogs(Bundle savedInstanceState) { 1085 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 1086 if (b == null) { 1087 return; 1088 } 1089 1090 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 1091 final int numDialogs = ids.length; 1092 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 1093 for (int i = 0; i < numDialogs; i++) { 1094 final Integer dialogId = ids[i]; 1095 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 1096 if (dialogState != null) { 1097 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 1098 // so tell createDialog() not to do it, otherwise we get an exception 1099 final ManagedDialog md = new ManagedDialog(); 1100 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 1101 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 1102 if (md.mDialog != null) { 1103 mManagedDialogs.put(dialogId, md); 1104 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 1105 md.mDialog.onRestoreInstanceState(dialogState); 1106 } 1107 } 1108 } 1109 } 1110 1111 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 1112 final Dialog dialog = onCreateDialog(dialogId, args); 1113 if (dialog == null) { 1114 return null; 1115 } 1116 dialog.dispatchOnCreate(state); 1117 return dialog; 1118 } 1119 1120 private static String savedDialogKeyFor(int key) { 1121 return SAVED_DIALOG_KEY_PREFIX + key; 1122 } 1123 1124 private static String savedDialogArgsKeyFor(int key) { 1125 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 1126 } 1127 1128 /** 1129 * Called when activity start-up is complete (after {@link #onStart} 1130 * and {@link #onRestoreInstanceState} have been called). Applications will 1131 * generally not implement this method; it is intended for system 1132 * classes to do final initialization after application code has run. 1133 * 1134 * <p><em>Derived classes must call through to the super class's 1135 * implementation of this method. If they do not, an exception will be 1136 * thrown.</em></p> 1137 * 1138 * @param savedInstanceState If the activity is being re-initialized after 1139 * previously being shut down then this Bundle contains the data it most 1140 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1141 * @see #onCreate 1142 */ 1143 @CallSuper 1144 protected void onPostCreate(@Nullable Bundle savedInstanceState) { 1145 if (!isChild()) { 1146 mTitleReady = true; 1147 onTitleChanged(getTitle(), getTitleColor()); 1148 } 1149 1150 mCalled = true; 1151 } 1152 1153 /** 1154 * This is the same as {@link #onPostCreate(Bundle)} but is called for activities 1155 * created with the attribute {@link android.R.attr#persistableMode} set to 1156 * <code>persistAcrossReboots</code>. 1157 * 1158 * @param savedInstanceState The data most recently supplied in {@link #onSaveInstanceState} 1159 * @param persistentState The data caming from the PersistableBundle first 1160 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1161 * 1162 * @see #onCreate 1163 */ 1164 public void onPostCreate(@Nullable Bundle savedInstanceState, 1165 @Nullable PersistableBundle persistentState) { 1166 onPostCreate(savedInstanceState); 1167 } 1168 1169 /** 1170 * Called after {@link #onCreate} — or after {@link #onRestart} when 1171 * the activity had been stopped, but is now again being displayed to the 1172 * user. It will be followed by {@link #onResume}. 1173 * 1174 * <p><em>Derived classes must call through to the super class's 1175 * implementation of this method. If they do not, an exception will be 1176 * thrown.</em></p> 1177 * 1178 * @see #onCreate 1179 * @see #onStop 1180 * @see #onResume 1181 */ 1182 @CallSuper 1183 protected void onStart() { 1184 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStart " + this); 1185 mCalled = true; 1186 1187 mFragments.doLoaderStart(); 1188 1189 getApplication().dispatchActivityStarted(this); 1190 } 1191 1192 /** 1193 * Called after {@link #onStop} when the current activity is being 1194 * re-displayed to the user (the user has navigated back to it). It will 1195 * be followed by {@link #onStart} and then {@link #onResume}. 1196 * 1197 * <p>For activities that are using raw {@link Cursor} objects (instead of 1198 * creating them through 1199 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1200 * this is usually the place 1201 * where the cursor should be requeried (because you had deactivated it in 1202 * {@link #onStop}. 1203 * 1204 * <p><em>Derived classes must call through to the super class's 1205 * implementation of this method. If they do not, an exception will be 1206 * thrown.</em></p> 1207 * 1208 * @see #onStop 1209 * @see #onStart 1210 * @see #onResume 1211 */ 1212 @CallSuper 1213 protected void onRestart() { 1214 mCalled = true; 1215 } 1216 1217 /** 1218 * Called when an {@link #onResume} is coming up, prior to other pre-resume callbacks 1219 * such as {@link #onNewIntent} and {@link #onActivityResult}. This is primarily intended 1220 * to give the activity a hint that its state is no longer saved -- it will generally 1221 * be called after {@link #onSaveInstanceState} and prior to the activity being 1222 * resumed/started again. 1223 */ 1224 public void onStateNotSaved() { 1225 } 1226 1227 /** 1228 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1229 * {@link #onPause}, for your activity to start interacting with the user. 1230 * This is a good place to begin animations, open exclusive-access devices 1231 * (such as the camera), etc. 1232 * 1233 * <p>Keep in mind that onResume is not the best indicator that your activity 1234 * is visible to the user; a system window such as the keyguard may be in 1235 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1236 * activity is visible to the user (for example, to resume a game). 1237 * 1238 * <p><em>Derived classes must call through to the super class's 1239 * implementation of this method. If they do not, an exception will be 1240 * thrown.</em></p> 1241 * 1242 * @see #onRestoreInstanceState 1243 * @see #onRestart 1244 * @see #onPostResume 1245 * @see #onPause 1246 */ 1247 @CallSuper 1248 protected void onResume() { 1249 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this); 1250 getApplication().dispatchActivityResumed(this); 1251 mActivityTransitionState.onResume(this, isTopOfTask()); 1252 mCalled = true; 1253 } 1254 1255 /** 1256 * Called when activity resume is complete (after {@link #onResume} has 1257 * been called). Applications will generally not implement this method; 1258 * it is intended for system classes to do final setup after application 1259 * resume code has run. 1260 * 1261 * <p><em>Derived classes must call through to the super class's 1262 * implementation of this method. If they do not, an exception will be 1263 * thrown.</em></p> 1264 * 1265 * @see #onResume 1266 */ 1267 @CallSuper 1268 protected void onPostResume() { 1269 final Window win = getWindow(); 1270 if (win != null) win.makeActive(); 1271 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1272 mCalled = true; 1273 } 1274 1275 void setVoiceInteractor(IVoiceInteractor voiceInteractor) { 1276 if (mVoiceInteractor != null) { 1277 for (Request activeRequest: mVoiceInteractor.getActiveRequests()) { 1278 activeRequest.cancel(); 1279 activeRequest.clear(); 1280 } 1281 } 1282 if (voiceInteractor == null) { 1283 mVoiceInteractor = null; 1284 } else { 1285 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 1286 Looper.myLooper()); 1287 } 1288 } 1289 1290 /** 1291 * Check whether this activity is running as part of a voice interaction with the user. 1292 * If true, it should perform its interaction with the user through the 1293 * {@link VoiceInteractor} returned by {@link #getVoiceInteractor}. 1294 */ 1295 public boolean isVoiceInteraction() { 1296 return mVoiceInteractor != null; 1297 } 1298 1299 /** 1300 * Like {@link #isVoiceInteraction}, but only returns true if this is also the root 1301 * of a voice interaction. That is, returns true if this activity was directly 1302 * started by the voice interaction service as the initiation of a voice interaction. 1303 * Otherwise, for example if it was started by another activity while under voice 1304 * interaction, returns false. 1305 */ 1306 public boolean isVoiceInteractionRoot() { 1307 try { 1308 return mVoiceInteractor != null 1309 && ActivityManagerNative.getDefault().isRootVoiceInteraction(mToken); 1310 } catch (RemoteException e) { 1311 } 1312 return false; 1313 } 1314 1315 /** 1316 * Retrieve the active {@link VoiceInteractor} that the user is going through to 1317 * interact with this activity. 1318 */ 1319 public VoiceInteractor getVoiceInteractor() { 1320 return mVoiceInteractor; 1321 } 1322 1323 /** 1324 * Queries whether the currently enabled voice interaction service supports returning 1325 * a voice interactor for use by the activity. This is valid only for the duration of the 1326 * activity. 1327 * 1328 * @return whether the current voice interaction service supports local voice interaction 1329 */ 1330 public boolean isLocalVoiceInteractionSupported() { 1331 try { 1332 return ActivityManagerNative.getDefault().supportsLocalVoiceInteraction(); 1333 } catch (RemoteException re) { 1334 } 1335 return false; 1336 } 1337 1338 /** 1339 * Starts a local voice interaction session. When ready, 1340 * {@link #onLocalVoiceInteractionStarted()} is called. You can pass a bundle of private options 1341 * to the registered voice interaction service. 1342 * @param privateOptions a Bundle of private arguments to the current voice interaction service 1343 */ 1344 public void startLocalVoiceInteraction(Bundle privateOptions) { 1345 try { 1346 ActivityManagerNative.getDefault().startLocalVoiceInteraction(mToken, privateOptions); 1347 } catch (RemoteException re) { 1348 } 1349 } 1350 1351 /** 1352 * Callback to indicate that {@link #startLocalVoiceInteraction(Bundle)} has resulted in a 1353 * voice interaction session being started. You can now retrieve a voice interactor using 1354 * {@link #getVoiceInteractor()}. 1355 */ 1356 public void onLocalVoiceInteractionStarted() { 1357 } 1358 1359 /** 1360 * Callback to indicate that the local voice interaction has stopped either 1361 * because it was requested through a call to {@link #stopLocalVoiceInteraction()} 1362 * or because it was canceled by the user. The previously acquired {@link VoiceInteractor} 1363 * is no longer valid after this. 1364 */ 1365 public void onLocalVoiceInteractionStopped() { 1366 } 1367 1368 /** 1369 * Request to terminate the current voice interaction that was previously started 1370 * using {@link #startLocalVoiceInteraction(Bundle)}. When the interaction is 1371 * terminated, {@link #onLocalVoiceInteractionStopped()} will be called. 1372 */ 1373 public void stopLocalVoiceInteraction() { 1374 try { 1375 ActivityManagerNative.getDefault().stopLocalVoiceInteraction(mToken); 1376 } catch (RemoteException re) { 1377 } 1378 } 1379 1380 /** 1381 * This is called for activities that set launchMode to "singleTop" in 1382 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1383 * flag when calling {@link #startActivity}. In either case, when the 1384 * activity is re-launched while at the top of the activity stack instead 1385 * of a new instance of the activity being started, onNewIntent() will be 1386 * called on the existing instance with the Intent that was used to 1387 * re-launch it. 1388 * 1389 * <p>An activity will always be paused before receiving a new intent, so 1390 * you can count on {@link #onResume} being called after this method. 1391 * 1392 * <p>Note that {@link #getIntent} still returns the original Intent. You 1393 * can use {@link #setIntent} to update it to this new Intent. 1394 * 1395 * @param intent The new intent that was started for the activity. 1396 * 1397 * @see #getIntent 1398 * @see #setIntent 1399 * @see #onResume 1400 */ 1401 protected void onNewIntent(Intent intent) { 1402 } 1403 1404 /** 1405 * The hook for {@link ActivityThread} to save the state of this activity. 1406 * 1407 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1408 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1409 * 1410 * @param outState The bundle to save the state to. 1411 */ 1412 final void performSaveInstanceState(Bundle outState) { 1413 onSaveInstanceState(outState); 1414 saveManagedDialogs(outState); 1415 mActivityTransitionState.saveState(outState); 1416 storeHasCurrentPermissionRequest(outState); 1417 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState); 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 * @param outPersistentState The bundle to save persistent state to. 1428 */ 1429 final void performSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1430 onSaveInstanceState(outState, outPersistentState); 1431 saveManagedDialogs(outState); 1432 storeHasCurrentPermissionRequest(outState); 1433 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState + 1434 ", " + outPersistentState); 1435 } 1436 1437 /** 1438 * Called to retrieve per-instance state from an activity before being killed 1439 * so that the state can be restored in {@link #onCreate} or 1440 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1441 * will be passed to both). 1442 * 1443 * <p>This method is called before an activity may be killed so that when it 1444 * comes back some time in the future it can restore its state. For example, 1445 * if activity B is launched in front of activity A, and at some point activity 1446 * A is killed to reclaim resources, activity A will have a chance to save the 1447 * current state of its user interface via this method so that when the user 1448 * returns to activity A, the state of the user interface can be restored 1449 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1450 * 1451 * <p>Do not confuse this method with activity lifecycle callbacks such as 1452 * {@link #onPause}, which is always called when an activity is being placed 1453 * in the background or on its way to destruction, or {@link #onStop} which 1454 * is called before destruction. One example of when {@link #onPause} and 1455 * {@link #onStop} is called and not this method is when a user navigates back 1456 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1457 * on B because that particular instance will never be restored, so the 1458 * system avoids calling it. An example when {@link #onPause} is called and 1459 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1460 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1461 * killed during the lifetime of B since the state of the user interface of 1462 * A will stay intact. 1463 * 1464 * <p>The default implementation takes care of most of the UI per-instance 1465 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1466 * view in the hierarchy that has an id, and by saving the id of the currently 1467 * focused view (all of which is restored by the default implementation of 1468 * {@link #onRestoreInstanceState}). If you override this method to save additional 1469 * information not captured by each individual view, you will likely want to 1470 * call through to the default implementation, otherwise be prepared to save 1471 * all of the state of each view yourself. 1472 * 1473 * <p>If called, this method will occur before {@link #onStop}. There are 1474 * no guarantees about whether it will occur before or after {@link #onPause}. 1475 * 1476 * @param outState Bundle in which to place your saved state. 1477 * 1478 * @see #onCreate 1479 * @see #onRestoreInstanceState 1480 * @see #onPause 1481 */ 1482 protected void onSaveInstanceState(Bundle outState) { 1483 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1484 Parcelable p = mFragments.saveAllState(); 1485 if (p != null) { 1486 outState.putParcelable(FRAGMENTS_TAG, p); 1487 } 1488 getApplication().dispatchActivitySaveInstanceState(this, outState); 1489 } 1490 1491 /** 1492 * This is the same as {@link #onSaveInstanceState} but is called for activities 1493 * created with the attribute {@link android.R.attr#persistableMode} set to 1494 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1495 * in will be saved and presented in {@link #onCreate(Bundle, PersistableBundle)} 1496 * the first time that this activity is restarted following the next device reboot. 1497 * 1498 * @param outState Bundle in which to place your saved state. 1499 * @param outPersistentState State which will be saved across reboots. 1500 * 1501 * @see #onSaveInstanceState(Bundle) 1502 * @see #onCreate 1503 * @see #onRestoreInstanceState(Bundle, PersistableBundle) 1504 * @see #onPause 1505 */ 1506 public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1507 onSaveInstanceState(outState); 1508 } 1509 1510 /** 1511 * Save the state of any managed dialogs. 1512 * 1513 * @param outState place to store the saved state. 1514 */ 1515 private void saveManagedDialogs(Bundle outState) { 1516 if (mManagedDialogs == null) { 1517 return; 1518 } 1519 1520 final int numDialogs = mManagedDialogs.size(); 1521 if (numDialogs == 0) { 1522 return; 1523 } 1524 1525 Bundle dialogState = new Bundle(); 1526 1527 int[] ids = new int[mManagedDialogs.size()]; 1528 1529 // save each dialog's bundle, gather the ids 1530 for (int i = 0; i < numDialogs; i++) { 1531 final int key = mManagedDialogs.keyAt(i); 1532 ids[i] = key; 1533 final ManagedDialog md = mManagedDialogs.valueAt(i); 1534 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1535 if (md.mArgs != null) { 1536 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1537 } 1538 } 1539 1540 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1541 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1542 } 1543 1544 1545 /** 1546 * Called as part of the activity lifecycle when an activity is going into 1547 * the background, but has not (yet) been killed. The counterpart to 1548 * {@link #onResume}. 1549 * 1550 * <p>When activity B is launched in front of activity A, this callback will 1551 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1552 * so be sure to not do anything lengthy here. 1553 * 1554 * <p>This callback is mostly used for saving any persistent state the 1555 * activity is editing, to present a "edit in place" model to the user and 1556 * making sure nothing is lost if there are not enough resources to start 1557 * the new activity without first killing this one. This is also a good 1558 * place to do things like stop animations and other things that consume a 1559 * noticeable amount of CPU in order to make the switch to the next activity 1560 * as fast as possible, or to close resources that are exclusive access 1561 * such as the camera. 1562 * 1563 * <p>In situations where the system needs more memory it may kill paused 1564 * processes to reclaim resources. Because of this, you should be sure 1565 * that all of your state is saved by the time you return from 1566 * this function. In general {@link #onSaveInstanceState} is used to save 1567 * per-instance state in the activity and this method is used to store 1568 * global persistent data (in content providers, files, etc.) 1569 * 1570 * <p>After receiving this call you will usually receive a following call 1571 * to {@link #onStop} (after the next activity has been resumed and 1572 * displayed), however in some cases there will be a direct call back to 1573 * {@link #onResume} without going through the stopped state. 1574 * 1575 * <p><em>Derived classes must call through to the super class's 1576 * implementation of this method. If they do not, an exception will be 1577 * thrown.</em></p> 1578 * 1579 * @see #onResume 1580 * @see #onSaveInstanceState 1581 * @see #onStop 1582 */ 1583 @CallSuper 1584 protected void onPause() { 1585 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this); 1586 getApplication().dispatchActivityPaused(this); 1587 mCalled = true; 1588 } 1589 1590 /** 1591 * Called as part of the activity lifecycle when an activity is about to go 1592 * into the background as the result of user choice. For example, when the 1593 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1594 * when an incoming phone call causes the in-call Activity to be automatically 1595 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1596 * the activity being interrupted. In cases when it is invoked, this method 1597 * is called right before the activity's {@link #onPause} callback. 1598 * 1599 * <p>This callback and {@link #onUserInteraction} are intended to help 1600 * activities manage status bar notifications intelligently; specifically, 1601 * for helping activities determine the proper time to cancel a notfication. 1602 * 1603 * @see #onUserInteraction() 1604 */ 1605 protected void onUserLeaveHint() { 1606 } 1607 1608 /** 1609 * Generate a new thumbnail for this activity. This method is called before 1610 * pausing the activity, and should draw into <var>outBitmap</var> the 1611 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1612 * can use the given <var>canvas</var>, which is configured to draw into the 1613 * bitmap, for rendering if desired. 1614 * 1615 * <p>The default implementation returns fails and does not draw a thumbnail; 1616 * this will result in the platform creating its own thumbnail if needed. 1617 * 1618 * @param outBitmap The bitmap to contain the thumbnail. 1619 * @param canvas Can be used to render into the bitmap. 1620 * 1621 * @return Return true if you have drawn into the bitmap; otherwise after 1622 * you return it will be filled with a default thumbnail. 1623 * 1624 * @see #onCreateDescription 1625 * @see #onSaveInstanceState 1626 * @see #onPause 1627 */ 1628 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1629 return false; 1630 } 1631 1632 /** 1633 * Generate a new description for this activity. This method is called 1634 * before pausing the activity and can, if desired, return some textual 1635 * description of its current state to be displayed to the user. 1636 * 1637 * <p>The default implementation returns null, which will cause you to 1638 * inherit the description from the previous activity. If all activities 1639 * return null, generally the label of the top activity will be used as the 1640 * description. 1641 * 1642 * @return A description of what the user is doing. It should be short and 1643 * sweet (only a few words). 1644 * 1645 * @see #onCreateThumbnail 1646 * @see #onSaveInstanceState 1647 * @see #onPause 1648 */ 1649 @Nullable 1650 public CharSequence onCreateDescription() { 1651 return null; 1652 } 1653 1654 /** 1655 * This is called when the user is requesting an assist, to build a full 1656 * {@link Intent#ACTION_ASSIST} Intent with all of the context of the current 1657 * application. You can override this method to place into the bundle anything 1658 * you would like to appear in the {@link Intent#EXTRA_ASSIST_CONTEXT} part 1659 * of the assist Intent. 1660 * 1661 * <p>This function will be called after any global assist callbacks that had 1662 * been registered with {@link Application#registerOnProvideAssistDataListener 1663 * Application.registerOnProvideAssistDataListener}. 1664 */ 1665 public void onProvideAssistData(Bundle data) { 1666 } 1667 1668 /** 1669 * This is called when the user is requesting an assist, to provide references 1670 * to content related to the current activity. Before being called, the 1671 * {@code outContent} Intent is filled with the base Intent of the activity (the Intent 1672 * returned by {@link #getIntent()}). The Intent's extras are stripped of any types 1673 * that are not valid for {@link PersistableBundle} or non-framework Parcelables, and 1674 * the flags {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION} and 1675 * {@link Intent#FLAG_GRANT_PERSISTABLE_URI_PERMISSION} are cleared from the Intent. 1676 * 1677 * <p>Custom implementation may adjust the content intent to better reflect the top-level 1678 * context of the activity, and fill in its ClipData with additional content of 1679 * interest that the user is currently viewing. For example, an image gallery application 1680 * that has launched in to an activity allowing the user to swipe through pictures should 1681 * modify the intent to reference the current image they are looking it; such an 1682 * application when showing a list of pictures should add a ClipData that has 1683 * references to all of the pictures currently visible on screen.</p> 1684 * 1685 * @param outContent The assist content to return. 1686 */ 1687 public void onProvideAssistContent(AssistContent outContent) { 1688 } 1689 1690 /** 1691 * Request the Keyboard Shortcuts screen to show up. This will trigger 1692 * {@link #onProvideKeyboardShortcuts} to retrieve the shortcuts for the foreground activity. 1693 */ 1694 public final void requestShowKeyboardShortcuts() { 1695 Intent intent = new Intent(Intent.ACTION_SHOW_KEYBOARD_SHORTCUTS); 1696 intent.setComponent(new ComponentName(KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME, 1697 KEYBOARD_SHORTCUTS_RECEIVER_CLASS_NAME)); 1698 sendBroadcast(intent); 1699 } 1700 1701 /** 1702 * Dismiss the Keyboard Shortcuts screen. 1703 */ 1704 public final void dismissKeyboardShortcutsHelper() { 1705 Intent intent = new Intent(Intent.ACTION_DISMISS_KEYBOARD_SHORTCUTS); 1706 intent.setComponent(new ComponentName(KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME, 1707 KEYBOARD_SHORTCUTS_RECEIVER_CLASS_NAME)); 1708 sendBroadcast(intent); 1709 } 1710 1711 @Override 1712 public void onProvideKeyboardShortcuts( 1713 List<KeyboardShortcutGroup> data, Menu menu, int deviceId) { 1714 if (menu == null) { 1715 return; 1716 } 1717 KeyboardShortcutGroup group = null; 1718 int menuSize = menu.size(); 1719 for (int i = 0; i < menuSize; ++i) { 1720 final MenuItem item = menu.getItem(i); 1721 final CharSequence title = item.getTitle(); 1722 final char alphaShortcut = item.getAlphabeticShortcut(); 1723 if (title != null && alphaShortcut != MIN_VALUE) { 1724 if (group == null) { 1725 final int resource = mApplication.getApplicationInfo().labelRes; 1726 group = new KeyboardShortcutGroup(resource != 0 ? getString(resource) : null); 1727 } 1728 group.addItem(new KeyboardShortcutInfo( 1729 title, alphaShortcut, KeyEvent.META_CTRL_ON)); 1730 } 1731 } 1732 if (group != null) { 1733 data.add(group); 1734 } 1735 } 1736 1737 /** 1738 * Ask to have the current assistant shown to the user. This only works if the calling 1739 * activity is the current foreground activity. It is the same as calling 1740 * {@link android.service.voice.VoiceInteractionService#showSession 1741 * VoiceInteractionService.showSession} and requesting all of the possible context. 1742 * The receiver will always see 1743 * {@link android.service.voice.VoiceInteractionSession#SHOW_SOURCE_APPLICATION} set. 1744 * @return Returns true if the assistant was successfully invoked, else false. For example 1745 * false will be returned if the caller is not the current top activity. 1746 */ 1747 public boolean showAssist(Bundle args) { 1748 try { 1749 return ActivityManagerNative.getDefault().showAssistFromActivity(mToken, args); 1750 } catch (RemoteException e) { 1751 } 1752 return false; 1753 } 1754 1755 /** 1756 * Called when you are no longer visible to the user. You will next 1757 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1758 * depending on later user activity. 1759 * 1760 * <p><em>Derived classes must call through to the super class's 1761 * implementation of this method. If they do not, an exception will be 1762 * thrown.</em></p> 1763 * 1764 * @see #onRestart 1765 * @see #onResume 1766 * @see #onSaveInstanceState 1767 * @see #onDestroy 1768 */ 1769 @CallSuper 1770 protected void onStop() { 1771 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStop " + this); 1772 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1773 mActivityTransitionState.onStop(); 1774 getApplication().dispatchActivityStopped(this); 1775 mTranslucentCallback = null; 1776 mCalled = true; 1777 } 1778 1779 /** 1780 * Perform any final cleanup before an activity is destroyed. This can 1781 * happen either because the activity is finishing (someone called 1782 * {@link #finish} on it, or because the system is temporarily destroying 1783 * this instance of the activity to save space. You can distinguish 1784 * between these two scenarios with the {@link #isFinishing} method. 1785 * 1786 * <p><em>Note: do not count on this method being called as a place for 1787 * saving data! For example, if an activity is editing data in a content 1788 * provider, those edits should be committed in either {@link #onPause} or 1789 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1790 * free resources like threads that are associated with an activity, so 1791 * that a destroyed activity does not leave such things around while the 1792 * rest of its application is still running. There are situations where 1793 * the system will simply kill the activity's hosting process without 1794 * calling this method (or any others) in it, so it should not be used to 1795 * do things that are intended to remain around after the process goes 1796 * away. 1797 * 1798 * <p><em>Derived classes must call through to the super class's 1799 * implementation of this method. If they do not, an exception will be 1800 * thrown.</em></p> 1801 * 1802 * @see #onPause 1803 * @see #onStop 1804 * @see #finish 1805 * @see #isFinishing 1806 */ 1807 @CallSuper 1808 protected void onDestroy() { 1809 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onDestroy " + this); 1810 mCalled = true; 1811 1812 // dismiss any dialogs we are managing. 1813 if (mManagedDialogs != null) { 1814 final int numDialogs = mManagedDialogs.size(); 1815 for (int i = 0; i < numDialogs; i++) { 1816 final ManagedDialog md = mManagedDialogs.valueAt(i); 1817 if (md.mDialog.isShowing()) { 1818 md.mDialog.dismiss(); 1819 } 1820 } 1821 mManagedDialogs = null; 1822 } 1823 1824 // close any cursors we are managing. 1825 synchronized (mManagedCursors) { 1826 int numCursors = mManagedCursors.size(); 1827 for (int i = 0; i < numCursors; i++) { 1828 ManagedCursor c = mManagedCursors.get(i); 1829 if (c != null) { 1830 c.mCursor.close(); 1831 } 1832 } 1833 mManagedCursors.clear(); 1834 } 1835 1836 // Close any open search dialog 1837 if (mSearchManager != null) { 1838 mSearchManager.stopSearch(); 1839 } 1840 1841 if (mActionBar != null) { 1842 mActionBar.onDestroy(); 1843 } 1844 1845 getApplication().dispatchActivityDestroyed(this); 1846 } 1847 1848 /** 1849 * Report to the system that your app is now fully drawn, purely for diagnostic 1850 * purposes (calling it does not impact the visible behavior of the activity). 1851 * This is only used to help instrument application launch times, so that the 1852 * app can report when it is fully in a usable state; without this, the only thing 1853 * the system itself can determine is the point at which the activity's window 1854 * is <em>first</em> drawn and displayed. To participate in app launch time 1855 * measurement, you should always call this method after first launch (when 1856 * {@link #onCreate(android.os.Bundle)} is called), at the point where you have 1857 * entirely drawn your UI and populated with all of the significant data. You 1858 * can safely call this method any time after first launch as well, in which case 1859 * it will simply be ignored. 1860 */ 1861 public void reportFullyDrawn() { 1862 if (mDoReportFullyDrawn) { 1863 mDoReportFullyDrawn = false; 1864 try { 1865 ActivityManagerNative.getDefault().reportActivityFullyDrawn(mToken); 1866 } catch (RemoteException e) { 1867 } 1868 } 1869 } 1870 1871 /** 1872 * Called by the system when the activity changes from fullscreen mode to multi-window mode and 1873 * visa-versa. 1874 * @see android.R.attr#resizeableActivity 1875 * 1876 * @param isInMultiWindowMode True if the activity is in multi-window mode. 1877 */ 1878 public void onMultiWindowModeChanged(boolean isInMultiWindowMode) { 1879 // Left deliberately empty. There should be no side effects if a direct 1880 // subclass of Activity does not call super. 1881 } 1882 1883 /** 1884 * Returns true if the activity is currently in multi-window mode. 1885 * @see android.R.attr#resizeableActivity 1886 * 1887 * @return True if the activity is in multi-window mode. 1888 */ 1889 public boolean isInMultiWindowMode() { 1890 try { 1891 return ActivityManagerNative.getDefault().isInMultiWindowMode(mToken); 1892 } catch (RemoteException e) { 1893 } 1894 return false; 1895 } 1896 1897 /** 1898 * Called by the system when the activity changes to and from picture-in-picture mode. 1899 * @see android.R.attr#supportsPictureInPicture 1900 * 1901 * @param isInPictureInPictureMode True if the activity is in picture-in-picture mode. 1902 */ 1903 public void onPictureInPictureModeChanged(boolean isInPictureInPictureMode) { 1904 // Left deliberately empty. There should be no side effects if a direct 1905 // subclass of Activity does not call super. 1906 } 1907 1908 /** 1909 * Returns true if the activity is currently in picture-in-picture mode. 1910 * @see android.R.attr#supportsPictureInPicture 1911 * 1912 * @return True if the activity is in picture-in-picture mode. 1913 */ 1914 public boolean isInPictureInPictureMode() { 1915 try { 1916 return ActivityManagerNative.getDefault().isInPictureInPictureMode(mToken); 1917 } catch (RemoteException e) { 1918 } 1919 return false; 1920 } 1921 1922 /** 1923 * Puts the activity in picture-in-picture mode. 1924 * @see android.R.attr#supportsPictureInPicture 1925 */ 1926 public void enterPictureInPictureMode() { 1927 try { 1928 ActivityManagerNative.getDefault().enterPictureInPictureMode(mToken); 1929 } catch (RemoteException e) { 1930 } 1931 } 1932 1933 /** 1934 * Called by the system when the device configuration changes while your 1935 * activity is running. Note that this will <em>only</em> be called if 1936 * you have selected configurations you would like to handle with the 1937 * {@link android.R.attr#configChanges} attribute in your manifest. If 1938 * any configuration change occurs that is not selected to be reported 1939 * by that attribute, then instead of reporting it the system will stop 1940 * and restart the activity (to have it launched with the new 1941 * configuration). 1942 * 1943 * <p>At the time that this function has been called, your Resources 1944 * object will have been updated to return resource values matching the 1945 * new configuration. 1946 * 1947 * @param newConfig The new device configuration. 1948 */ 1949 public void onConfigurationChanged(Configuration newConfig) { 1950 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig); 1951 mCalled = true; 1952 1953 mFragments.dispatchConfigurationChanged(newConfig); 1954 1955 if (mWindow != null) { 1956 // Pass the configuration changed event to the window 1957 mWindow.onConfigurationChanged(newConfig); 1958 } 1959 1960 if (mActionBar != null) { 1961 // Do this last; the action bar will need to access 1962 // view changes from above. 1963 mActionBar.onConfigurationChanged(newConfig); 1964 } 1965 } 1966 1967 /** 1968 * If this activity is being destroyed because it can not handle a 1969 * configuration parameter being changed (and thus its 1970 * {@link #onConfigurationChanged(Configuration)} method is 1971 * <em>not</em> being called), then you can use this method to discover 1972 * the set of changes that have occurred while in the process of being 1973 * destroyed. Note that there is no guarantee that these will be 1974 * accurate (other changes could have happened at any time), so you should 1975 * only use this as an optimization hint. 1976 * 1977 * @return Returns a bit field of the configuration parameters that are 1978 * changing, as defined by the {@link android.content.res.Configuration} 1979 * class. 1980 */ 1981 public int getChangingConfigurations() { 1982 return mConfigChangeFlags; 1983 } 1984 1985 /** 1986 * Retrieve the non-configuration instance data that was previously 1987 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1988 * be available from the initial {@link #onCreate} and 1989 * {@link #onStart} calls to the new instance, allowing you to extract 1990 * any useful dynamic state from the previous instance. 1991 * 1992 * <p>Note that the data you retrieve here should <em>only</em> be used 1993 * as an optimization for handling configuration changes. You should always 1994 * be able to handle getting a null pointer back, and an activity must 1995 * still be able to restore itself to its previous state (through the 1996 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1997 * function returns null. 1998 * 1999 * <p><strong>Note:</strong> For most cases you should use the {@link Fragment} API 2000 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 2001 * available on older platforms through the Android support libraries. 2002 * 2003 * @return the object previously returned by {@link #onRetainNonConfigurationInstance()} 2004 */ 2005 @Nullable 2006 public Object getLastNonConfigurationInstance() { 2007 return mLastNonConfigurationInstances != null 2008 ? mLastNonConfigurationInstances.activity : null; 2009 } 2010 2011 /** 2012 * Called by the system, as part of destroying an 2013 * activity due to a configuration change, when it is known that a new 2014 * instance will immediately be created for the new configuration. You 2015 * can return any object you like here, including the activity instance 2016 * itself, which can later be retrieved by calling 2017 * {@link #getLastNonConfigurationInstance()} in the new activity 2018 * instance. 2019 * 2020 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2021 * or later, consider instead using a {@link Fragment} with 2022 * {@link Fragment#setRetainInstance(boolean) 2023 * Fragment.setRetainInstance(boolean}.</em> 2024 * 2025 * <p>This function is called purely as an optimization, and you must 2026 * not rely on it being called. When it is called, a number of guarantees 2027 * will be made to help optimize configuration switching: 2028 * <ul> 2029 * <li> The function will be called between {@link #onStop} and 2030 * {@link #onDestroy}. 2031 * <li> A new instance of the activity will <em>always</em> be immediately 2032 * created after this one's {@link #onDestroy()} is called. In particular, 2033 * <em>no</em> messages will be dispatched during this time (when the returned 2034 * object does not have an activity to be associated with). 2035 * <li> The object you return here will <em>always</em> be available from 2036 * the {@link #getLastNonConfigurationInstance()} method of the following 2037 * activity instance as described there. 2038 * </ul> 2039 * 2040 * <p>These guarantees are designed so that an activity can use this API 2041 * to propagate extensive state from the old to new activity instance, from 2042 * loaded bitmaps, to network connections, to evenly actively running 2043 * threads. Note that you should <em>not</em> propagate any data that 2044 * may change based on the configuration, including any data loaded from 2045 * resources such as strings, layouts, or drawables. 2046 * 2047 * <p>The guarantee of no message handling during the switch to the next 2048 * activity simplifies use with active objects. For example if your retained 2049 * state is an {@link android.os.AsyncTask} you are guaranteed that its 2050 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 2051 * not be called from the call here until you execute the next instance's 2052 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 2053 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 2054 * running in a separate thread.) 2055 * 2056 * <p><strong>Note:</strong> For most cases you should use the {@link Fragment} API 2057 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 2058 * available on older platforms through the Android support libraries. 2059 * 2060 * @return any Object holding the desired state to propagate to the 2061 * next activity instance 2062 */ 2063 public Object onRetainNonConfigurationInstance() { 2064 return null; 2065 } 2066 2067 /** 2068 * Retrieve the non-configuration instance data that was previously 2069 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 2070 * be available from the initial {@link #onCreate} and 2071 * {@link #onStart} calls to the new instance, allowing you to extract 2072 * any useful dynamic state from the previous instance. 2073 * 2074 * <p>Note that the data you retrieve here should <em>only</em> be used 2075 * as an optimization for handling configuration changes. You should always 2076 * be able to handle getting a null pointer back, and an activity must 2077 * still be able to restore itself to its previous state (through the 2078 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 2079 * function returns null. 2080 * 2081 * @return Returns the object previously returned by 2082 * {@link #onRetainNonConfigurationChildInstances()} 2083 */ 2084 @Nullable 2085 HashMap<String, Object> getLastNonConfigurationChildInstances() { 2086 return mLastNonConfigurationInstances != null 2087 ? mLastNonConfigurationInstances.children : null; 2088 } 2089 2090 /** 2091 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 2092 * it should return either a mapping from child activity id strings to arbitrary objects, 2093 * or null. This method is intended to be used by Activity framework subclasses that control a 2094 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 2095 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 2096 */ 2097 @Nullable 2098 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 2099 return null; 2100 } 2101 2102 NonConfigurationInstances retainNonConfigurationInstances() { 2103 Object activity = onRetainNonConfigurationInstance(); 2104 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 2105 FragmentManagerNonConfig fragments = mFragments.retainNestedNonConfig(); 2106 2107 // We're already stopped but we've been asked to retain. 2108 // Our fragments are taken care of but we need to mark the loaders for retention. 2109 // In order to do this correctly we need to restart the loaders first before 2110 // handing them off to the next activity. 2111 mFragments.doLoaderStart(); 2112 mFragments.doLoaderStop(true); 2113 ArrayMap<String, LoaderManager> loaders = mFragments.retainLoaderNonConfig(); 2114 2115 if (activity == null && children == null && fragments == null && loaders == null 2116 && mVoiceInteractor == null) { 2117 return null; 2118 } 2119 2120 NonConfigurationInstances nci = new NonConfigurationInstances(); 2121 nci.activity = activity; 2122 nci.children = children; 2123 nci.fragments = fragments; 2124 nci.loaders = loaders; 2125 if (mVoiceInteractor != null) { 2126 mVoiceInteractor.retainInstance(); 2127 nci.voiceInteractor = mVoiceInteractor; 2128 } 2129 return nci; 2130 } 2131 2132 public void onLowMemory() { 2133 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onLowMemory " + this); 2134 mCalled = true; 2135 mFragments.dispatchLowMemory(); 2136 } 2137 2138 public void onTrimMemory(int level) { 2139 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onTrimMemory " + this + ": " + level); 2140 mCalled = true; 2141 mFragments.dispatchTrimMemory(level); 2142 } 2143 2144 /** 2145 * Return the FragmentManager for interacting with fragments associated 2146 * with this activity. 2147 */ 2148 public FragmentManager getFragmentManager() { 2149 return mFragments.getFragmentManager(); 2150 } 2151 2152 /** 2153 * Called when a Fragment is being attached to this activity, immediately 2154 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 2155 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 2156 */ 2157 public void onAttachFragment(Fragment fragment) { 2158 } 2159 2160 /** 2161 * Wrapper around 2162 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 2163 * that gives the resulting {@link Cursor} to call 2164 * {@link #startManagingCursor} so that the activity will manage its 2165 * lifecycle for you. 2166 * 2167 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2168 * or later, consider instead using {@link LoaderManager} instead, available 2169 * via {@link #getLoaderManager()}.</em> 2170 * 2171 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 2172 * this method, because the activity will do that for you at the appropriate time. However, if 2173 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 2174 * not</em> automatically close the cursor and, in that case, you must call 2175 * {@link Cursor#close()}.</p> 2176 * 2177 * @param uri The URI of the content provider to query. 2178 * @param projection List of columns to return. 2179 * @param selection SQL WHERE clause. 2180 * @param sortOrder SQL ORDER BY clause. 2181 * 2182 * @return The Cursor that was returned by query(). 2183 * 2184 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 2185 * @see #startManagingCursor 2186 * @hide 2187 * 2188 * @deprecated Use {@link CursorLoader} instead. 2189 */ 2190 @Deprecated 2191 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 2192 String sortOrder) { 2193 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 2194 if (c != null) { 2195 startManagingCursor(c); 2196 } 2197 return c; 2198 } 2199 2200 /** 2201 * Wrapper around 2202 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 2203 * that gives the resulting {@link Cursor} to call 2204 * {@link #startManagingCursor} so that the activity will manage its 2205 * lifecycle for you. 2206 * 2207 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2208 * or later, consider instead using {@link LoaderManager} instead, available 2209 * via {@link #getLoaderManager()}.</em> 2210 * 2211 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 2212 * this method, because the activity will do that for you at the appropriate time. However, if 2213 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 2214 * not</em> automatically close the cursor and, in that case, you must call 2215 * {@link Cursor#close()}.</p> 2216 * 2217 * @param uri The URI of the content provider to query. 2218 * @param projection List of columns to return. 2219 * @param selection SQL WHERE clause. 2220 * @param selectionArgs The arguments to selection, if any ?s are pesent 2221 * @param sortOrder SQL ORDER BY clause. 2222 * 2223 * @return The Cursor that was returned by query(). 2224 * 2225 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 2226 * @see #startManagingCursor 2227 * 2228 * @deprecated Use {@link CursorLoader} instead. 2229 */ 2230 @Deprecated 2231 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 2232 String[] selectionArgs, String sortOrder) { 2233 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 2234 if (c != null) { 2235 startManagingCursor(c); 2236 } 2237 return c; 2238 } 2239 2240 /** 2241 * This method allows the activity to take care of managing the given 2242 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 2243 * That is, when the activity is stopped it will automatically call 2244 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 2245 * it will call {@link Cursor#requery} for you. When the activity is 2246 * destroyed, all managed Cursors will be closed automatically. 2247 * 2248 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2249 * or later, consider instead using {@link LoaderManager} instead, available 2250 * via {@link #getLoaderManager()}.</em> 2251 * 2252 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 2253 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 2254 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 2255 * <em>will not</em> automatically close the cursor and, in that case, you must call 2256 * {@link Cursor#close()}.</p> 2257 * 2258 * @param c The Cursor to be managed. 2259 * 2260 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 2261 * @see #stopManagingCursor 2262 * 2263 * @deprecated Use the new {@link android.content.CursorLoader} class with 2264 * {@link LoaderManager} instead; this is also 2265 * available on older platforms through the Android compatibility package. 2266 */ 2267 @Deprecated 2268 public void startManagingCursor(Cursor c) { 2269 synchronized (mManagedCursors) { 2270 mManagedCursors.add(new ManagedCursor(c)); 2271 } 2272 } 2273 2274 /** 2275 * Given a Cursor that was previously given to 2276 * {@link #startManagingCursor}, stop the activity's management of that 2277 * cursor. 2278 * 2279 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 2280 * the system <em>will not</em> automatically close the cursor and you must call 2281 * {@link Cursor#close()}.</p> 2282 * 2283 * @param c The Cursor that was being managed. 2284 * 2285 * @see #startManagingCursor 2286 * 2287 * @deprecated Use the new {@link android.content.CursorLoader} class with 2288 * {@link LoaderManager} instead; this is also 2289 * available on older platforms through the Android compatibility package. 2290 */ 2291 @Deprecated 2292 public void stopManagingCursor(Cursor c) { 2293 synchronized (mManagedCursors) { 2294 final int N = mManagedCursors.size(); 2295 for (int i=0; i<N; i++) { 2296 ManagedCursor mc = mManagedCursors.get(i); 2297 if (mc.mCursor == c) { 2298 mManagedCursors.remove(i); 2299 break; 2300 } 2301 } 2302 } 2303 } 2304 2305 /** 2306 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 2307 * this is a no-op. 2308 * @hide 2309 */ 2310 @Deprecated 2311 public void setPersistent(boolean isPersistent) { 2312 } 2313 2314 /** 2315 * Finds a view that was identified by the id attribute from the XML that 2316 * was processed in {@link #onCreate}. 2317 * 2318 * @return The view if found or null otherwise. 2319 */ 2320 @Nullable 2321 public View findViewById(@IdRes int id) { 2322 return getWindow().findViewById(id); 2323 } 2324 2325 /** 2326 * Retrieve a reference to this activity's ActionBar. 2327 * 2328 * @return The Activity's ActionBar, or null if it does not have one. 2329 */ 2330 @Nullable 2331 public ActionBar getActionBar() { 2332 initWindowDecorActionBar(); 2333 return mActionBar; 2334 } 2335 2336 /** 2337 * Set a {@link android.widget.Toolbar Toolbar} to act as the {@link ActionBar} for this 2338 * Activity window. 2339 * 2340 * <p>When set to a non-null value the {@link #getActionBar()} method will return 2341 * an {@link ActionBar} object that can be used to control the given toolbar as if it were 2342 * a traditional window decor action bar. The toolbar's menu will be populated with the 2343 * Activity's options menu and the navigation button will be wired through the standard 2344 * {@link android.R.id#home home} menu select action.</p> 2345 * 2346 * <p>In order to use a Toolbar within the Activity's window content the application 2347 * must not request the window feature {@link Window#FEATURE_ACTION_BAR FEATURE_ACTION_BAR}.</p> 2348 * 2349 * @param toolbar Toolbar to set as the Activity's action bar, or {@code null} to clear it 2350 */ 2351 public void setActionBar(@Nullable Toolbar toolbar) { 2352 final ActionBar ab = getActionBar(); 2353 if (ab instanceof WindowDecorActionBar) { 2354 throw new IllegalStateException("This Activity already has an action bar supplied " + 2355 "by the window decor. Do not request Window.FEATURE_ACTION_BAR and set " + 2356 "android:windowActionBar to false in your theme to use a Toolbar instead."); 2357 } 2358 2359 // If we reach here then we're setting a new action bar 2360 // First clear out the MenuInflater to make sure that it is valid for the new Action Bar 2361 mMenuInflater = null; 2362 2363 // If we have an action bar currently, destroy it 2364 if (ab != null) { 2365 ab.onDestroy(); 2366 } 2367 2368 if (toolbar != null) { 2369 final ToolbarActionBar tbab = new ToolbarActionBar(toolbar, getTitle(), this); 2370 mActionBar = tbab; 2371 mWindow.setCallback(tbab.getWrappedWindowCallback()); 2372 } else { 2373 mActionBar = null; 2374 // Re-set the original window callback since we may have already set a Toolbar wrapper 2375 mWindow.setCallback(this); 2376 } 2377 2378 invalidateOptionsMenu(); 2379 } 2380 2381 /** 2382 * Creates a new ActionBar, locates the inflated ActionBarView, 2383 * initializes the ActionBar with the view, and sets mActionBar. 2384 */ 2385 private void initWindowDecorActionBar() { 2386 Window window = getWindow(); 2387 2388 // Initializing the window decor can change window feature flags. 2389 // Make sure that we have the correct set before performing the test below. 2390 window.getDecorView(); 2391 2392 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 2393 return; 2394 } 2395 2396 mActionBar = new WindowDecorActionBar(this); 2397 mActionBar.setDefaultDisplayHomeAsUpEnabled(mEnableDefaultActionBarUp); 2398 2399 mWindow.setDefaultIcon(mActivityInfo.getIconResource()); 2400 mWindow.setDefaultLogo(mActivityInfo.getLogoResource()); 2401 } 2402 2403 /** 2404 * Set the activity content from a layout resource. The resource will be 2405 * inflated, adding all top-level views to the activity. 2406 * 2407 * @param layoutResID Resource ID to be inflated. 2408 * 2409 * @see #setContentView(android.view.View) 2410 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2411 */ 2412 public void setContentView(@LayoutRes int layoutResID) { 2413 getWindow().setContentView(layoutResID); 2414 initWindowDecorActionBar(); 2415 } 2416 2417 /** 2418 * Set the activity content to an explicit view. This view is placed 2419 * directly into the activity's view hierarchy. It can itself be a complex 2420 * view hierarchy. When calling this method, the layout parameters of the 2421 * specified view are ignored. Both the width and the height of the view are 2422 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 2423 * your own layout parameters, invoke 2424 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 2425 * instead. 2426 * 2427 * @param view The desired content to display. 2428 * 2429 * @see #setContentView(int) 2430 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2431 */ 2432 public void setContentView(View view) { 2433 getWindow().setContentView(view); 2434 initWindowDecorActionBar(); 2435 } 2436 2437 /** 2438 * Set the activity content to an explicit view. This view is placed 2439 * directly into the activity's view hierarchy. It can itself be a complex 2440 * view hierarchy. 2441 * 2442 * @param view The desired content to display. 2443 * @param params Layout parameters for the view. 2444 * 2445 * @see #setContentView(android.view.View) 2446 * @see #setContentView(int) 2447 */ 2448 public void setContentView(View view, ViewGroup.LayoutParams params) { 2449 getWindow().setContentView(view, params); 2450 initWindowDecorActionBar(); 2451 } 2452 2453 /** 2454 * Add an additional content view to the activity. Added after any existing 2455 * ones in the activity -- existing views are NOT removed. 2456 * 2457 * @param view The desired content to display. 2458 * @param params Layout parameters for the view. 2459 */ 2460 public void addContentView(View view, ViewGroup.LayoutParams params) { 2461 getWindow().addContentView(view, params); 2462 initWindowDecorActionBar(); 2463 } 2464 2465 /** 2466 * Retrieve the {@link TransitionManager} responsible for default transitions in this window. 2467 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2468 * 2469 * <p>This method will return non-null after content has been initialized (e.g. by using 2470 * {@link #setContentView}) if {@link Window#FEATURE_CONTENT_TRANSITIONS} has been granted.</p> 2471 * 2472 * @return This window's content TransitionManager or null if none is set. 2473 */ 2474 public TransitionManager getContentTransitionManager() { 2475 return getWindow().getTransitionManager(); 2476 } 2477 2478 /** 2479 * Set the {@link TransitionManager} to use for default transitions in this window. 2480 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2481 * 2482 * @param tm The TransitionManager to use for scene changes. 2483 */ 2484 public void setContentTransitionManager(TransitionManager tm) { 2485 getWindow().setTransitionManager(tm); 2486 } 2487 2488 /** 2489 * Retrieve the {@link Scene} representing this window's current content. 2490 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2491 * 2492 * <p>This method will return null if the current content is not represented by a Scene.</p> 2493 * 2494 * @return Current Scene being shown or null 2495 */ 2496 public Scene getContentScene() { 2497 return getWindow().getContentScene(); 2498 } 2499 2500 /** 2501 * Sets whether this activity is finished when touched outside its window's 2502 * bounds. 2503 */ 2504 public void setFinishOnTouchOutside(boolean finish) { 2505 mWindow.setCloseOnTouchOutside(finish); 2506 } 2507 2508 /** @hide */ 2509 @IntDef({ 2510 DEFAULT_KEYS_DISABLE, 2511 DEFAULT_KEYS_DIALER, 2512 DEFAULT_KEYS_SHORTCUT, 2513 DEFAULT_KEYS_SEARCH_LOCAL, 2514 DEFAULT_KEYS_SEARCH_GLOBAL}) 2515 @Retention(RetentionPolicy.SOURCE) 2516 @interface DefaultKeyMode {} 2517 2518 /** 2519 * Use with {@link #setDefaultKeyMode} to turn off default handling of 2520 * keys. 2521 * 2522 * @see #setDefaultKeyMode 2523 */ 2524 static public final int DEFAULT_KEYS_DISABLE = 0; 2525 /** 2526 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 2527 * key handling. 2528 * 2529 * @see #setDefaultKeyMode 2530 */ 2531 static public final int DEFAULT_KEYS_DIALER = 1; 2532 /** 2533 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 2534 * default key handling. 2535 * 2536 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 2537 * 2538 * @see #setDefaultKeyMode 2539 */ 2540 static public final int DEFAULT_KEYS_SHORTCUT = 2; 2541 /** 2542 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2543 * will start an application-defined search. (If the application or activity does not 2544 * actually define a search, the the keys will be ignored.) 2545 * 2546 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2547 * 2548 * @see #setDefaultKeyMode 2549 */ 2550 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 2551 2552 /** 2553 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2554 * will start a global search (typically web search, but some platforms may define alternate 2555 * methods for global search) 2556 * 2557 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2558 * 2559 * @see #setDefaultKeyMode 2560 */ 2561 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 2562 2563 /** 2564 * Select the default key handling for this activity. This controls what 2565 * will happen to key events that are not otherwise handled. The default 2566 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 2567 * floor. Other modes allow you to launch the dialer 2568 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 2569 * menu without requiring the menu key be held down 2570 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 2571 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 2572 * 2573 * <p>Note that the mode selected here does not impact the default 2574 * handling of system keys, such as the "back" and "menu" keys, and your 2575 * activity and its views always get a first chance to receive and handle 2576 * all application keys. 2577 * 2578 * @param mode The desired default key mode constant. 2579 * 2580 * @see #DEFAULT_KEYS_DISABLE 2581 * @see #DEFAULT_KEYS_DIALER 2582 * @see #DEFAULT_KEYS_SHORTCUT 2583 * @see #DEFAULT_KEYS_SEARCH_LOCAL 2584 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 2585 * @see #onKeyDown 2586 */ 2587 public final void setDefaultKeyMode(@DefaultKeyMode int mode) { 2588 mDefaultKeyMode = mode; 2589 2590 // Some modes use a SpannableStringBuilder to track & dispatch input events 2591 // This list must remain in sync with the switch in onKeyDown() 2592 switch (mode) { 2593 case DEFAULT_KEYS_DISABLE: 2594 case DEFAULT_KEYS_SHORTCUT: 2595 mDefaultKeySsb = null; // not used in these modes 2596 break; 2597 case DEFAULT_KEYS_DIALER: 2598 case DEFAULT_KEYS_SEARCH_LOCAL: 2599 case DEFAULT_KEYS_SEARCH_GLOBAL: 2600 mDefaultKeySsb = new SpannableStringBuilder(); 2601 Selection.setSelection(mDefaultKeySsb,0); 2602 break; 2603 default: 2604 throw new IllegalArgumentException(); 2605 } 2606 } 2607 2608 /** 2609 * Called when a key was pressed down and not handled by any of the views 2610 * inside of the activity. So, for example, key presses while the cursor 2611 * is inside a TextView will not trigger the event (unless it is a navigation 2612 * to another object) because TextView handles its own key presses. 2613 * 2614 * <p>If the focused view didn't want this event, this method is called. 2615 * 2616 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2617 * by calling {@link #onBackPressed()}, though the behavior varies based 2618 * on the application compatibility mode: for 2619 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2620 * it will set up the dispatch to call {@link #onKeyUp} where the action 2621 * will be performed; for earlier applications, it will perform the 2622 * action immediately in on-down, as those versions of the platform 2623 * behaved. 2624 * 2625 * <p>Other additional default key handling may be performed 2626 * if configured with {@link #setDefaultKeyMode}. 2627 * 2628 * @return Return <code>true</code> to prevent this event from being propagated 2629 * further, or <code>false</code> to indicate that you have not handled 2630 * this event and it should continue to be propagated. 2631 * @see #onKeyUp 2632 * @see android.view.KeyEvent 2633 */ 2634 public boolean onKeyDown(int keyCode, KeyEvent event) { 2635 if (keyCode == KeyEvent.KEYCODE_BACK) { 2636 if (getApplicationInfo().targetSdkVersion 2637 >= Build.VERSION_CODES.ECLAIR) { 2638 event.startTracking(); 2639 } else { 2640 onBackPressed(); 2641 } 2642 return true; 2643 } 2644 2645 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2646 return false; 2647 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2648 Window w = getWindow(); 2649 if (w.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 2650 w.performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, keyCode, event, 2651 Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2652 return true; 2653 } 2654 return false; 2655 } else { 2656 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2657 boolean clearSpannable = false; 2658 boolean handled; 2659 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2660 clearSpannable = true; 2661 handled = false; 2662 } else { 2663 handled = TextKeyListener.getInstance().onKeyDown( 2664 null, mDefaultKeySsb, keyCode, event); 2665 if (handled && mDefaultKeySsb.length() > 0) { 2666 // something useable has been typed - dispatch it now. 2667 2668 final String str = mDefaultKeySsb.toString(); 2669 clearSpannable = true; 2670 2671 switch (mDefaultKeyMode) { 2672 case DEFAULT_KEYS_DIALER: 2673 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2674 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2675 startActivity(intent); 2676 break; 2677 case DEFAULT_KEYS_SEARCH_LOCAL: 2678 startSearch(str, false, null, false); 2679 break; 2680 case DEFAULT_KEYS_SEARCH_GLOBAL: 2681 startSearch(str, false, null, true); 2682 break; 2683 } 2684 } 2685 } 2686 if (clearSpannable) { 2687 mDefaultKeySsb.clear(); 2688 mDefaultKeySsb.clearSpans(); 2689 Selection.setSelection(mDefaultKeySsb,0); 2690 } 2691 return handled; 2692 } 2693 } 2694 2695 /** 2696 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2697 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2698 * the event). 2699 */ 2700 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2701 return false; 2702 } 2703 2704 /** 2705 * Called when a key was released and not handled by any of the views 2706 * inside of the activity. So, for example, key presses while the cursor 2707 * is inside a TextView will not trigger the event (unless it is a navigation 2708 * to another object) because TextView handles its own key presses. 2709 * 2710 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2711 * and go back. 2712 * 2713 * @return Return <code>true</code> to prevent this event from being propagated 2714 * further, or <code>false</code> to indicate that you have not handled 2715 * this event and it should continue to be propagated. 2716 * @see #onKeyDown 2717 * @see KeyEvent 2718 */ 2719 public boolean onKeyUp(int keyCode, KeyEvent event) { 2720 if (getApplicationInfo().targetSdkVersion 2721 >= Build.VERSION_CODES.ECLAIR) { 2722 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2723 && !event.isCanceled()) { 2724 onBackPressed(); 2725 return true; 2726 } 2727 } 2728 return false; 2729 } 2730 2731 /** 2732 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2733 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2734 * the event). 2735 */ 2736 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2737 return false; 2738 } 2739 2740 /** 2741 * Called when the activity has detected the user's press of the back 2742 * key. The default implementation simply finishes the current activity, 2743 * but you can override this to do whatever you want. 2744 */ 2745 public void onBackPressed() { 2746 if (mActionBar != null && mActionBar.collapseActionView()) { 2747 return; 2748 } 2749 2750 if (!mFragments.getFragmentManager().popBackStackImmediate()) { 2751 finishAfterTransition(); 2752 } 2753 } 2754 2755 /** 2756 * Called when a key shortcut event is not handled by any of the views in the Activity. 2757 * Override this method to implement global key shortcuts for the Activity. 2758 * Key shortcuts can also be implemented by setting the 2759 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2760 * 2761 * @param keyCode The value in event.getKeyCode(). 2762 * @param event Description of the key event. 2763 * @return True if the key shortcut was handled. 2764 */ 2765 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2766 // Let the Action Bar have a chance at handling the shortcut. 2767 ActionBar actionBar = getActionBar(); 2768 return (actionBar != null && actionBar.onKeyShortcut(keyCode, event)); 2769 } 2770 2771 /** 2772 * Called when a touch screen event was not handled by any of the views 2773 * under it. This is most useful to process touch events that happen 2774 * outside of your window bounds, where there is no view to receive it. 2775 * 2776 * @param event The touch screen event being processed. 2777 * 2778 * @return Return true if you have consumed the event, false if you haven't. 2779 * The default implementation always returns false. 2780 */ 2781 public boolean onTouchEvent(MotionEvent event) { 2782 if (mWindow.shouldCloseOnTouch(this, event)) { 2783 finish(); 2784 return true; 2785 } 2786 2787 return false; 2788 } 2789 2790 /** 2791 * Called when the trackball was moved and not handled by any of the 2792 * views inside of the activity. So, for example, if the trackball moves 2793 * while focus is on a button, you will receive a call here because 2794 * buttons do not normally do anything with trackball events. The call 2795 * here happens <em>before</em> trackball movements are converted to 2796 * DPAD key events, which then get sent back to the view hierarchy, and 2797 * will be processed at the point for things like focus navigation. 2798 * 2799 * @param event The trackball event being processed. 2800 * 2801 * @return Return true if you have consumed the event, false if you haven't. 2802 * The default implementation always returns false. 2803 */ 2804 public boolean onTrackballEvent(MotionEvent event) { 2805 return false; 2806 } 2807 2808 /** 2809 * Called when a generic motion event was not handled by any of the 2810 * views inside of the activity. 2811 * <p> 2812 * Generic motion events describe joystick movements, mouse hovers, track pad 2813 * touches, scroll wheel movements and other input events. The 2814 * {@link MotionEvent#getSource() source} of the motion event specifies 2815 * the class of input that was received. Implementations of this method 2816 * must examine the bits in the source before processing the event. 2817 * The following code example shows how this is done. 2818 * </p><p> 2819 * Generic motion events with source class 2820 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2821 * are delivered to the view under the pointer. All other generic motion events are 2822 * delivered to the focused view. 2823 * </p><p> 2824 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2825 * handle this event. 2826 * </p> 2827 * 2828 * @param event The generic motion event being processed. 2829 * 2830 * @return Return true if you have consumed the event, false if you haven't. 2831 * The default implementation always returns false. 2832 */ 2833 public boolean onGenericMotionEvent(MotionEvent event) { 2834 return false; 2835 } 2836 2837 /** 2838 * Called whenever a key, touch, or trackball event is dispatched to the 2839 * activity. Implement this method if you wish to know that the user has 2840 * interacted with the device in some way while your activity is running. 2841 * This callback and {@link #onUserLeaveHint} are intended to help 2842 * activities manage status bar notifications intelligently; specifically, 2843 * for helping activities determine the proper time to cancel a notfication. 2844 * 2845 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2846 * be accompanied by calls to {@link #onUserInteraction}. This 2847 * ensures that your activity will be told of relevant user activity such 2848 * as pulling down the notification pane and touching an item there. 2849 * 2850 * <p>Note that this callback will be invoked for the touch down action 2851 * that begins a touch gesture, but may not be invoked for the touch-moved 2852 * and touch-up actions that follow. 2853 * 2854 * @see #onUserLeaveHint() 2855 */ 2856 public void onUserInteraction() { 2857 } 2858 2859 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2860 // Update window manager if: we have a view, that view is 2861 // attached to its parent (which will be a RootView), and 2862 // this activity is not embedded. 2863 if (mParent == null) { 2864 View decor = mDecor; 2865 if (decor != null && decor.getParent() != null) { 2866 getWindowManager().updateViewLayout(decor, params); 2867 } 2868 } 2869 } 2870 2871 public void onContentChanged() { 2872 } 2873 2874 /** 2875 * Called when the current {@link Window} of the activity gains or loses 2876 * focus. This is the best indicator of whether this activity is visible 2877 * to the user. The default implementation clears the key tracking 2878 * state, so should always be called. 2879 * 2880 * <p>Note that this provides information about global focus state, which 2881 * is managed independently of activity lifecycles. As such, while focus 2882 * changes will generally have some relation to lifecycle changes (an 2883 * activity that is stopped will not generally get window focus), you 2884 * should not rely on any particular order between the callbacks here and 2885 * those in the other lifecycle methods such as {@link #onResume}. 2886 * 2887 * <p>As a general rule, however, a resumed activity will have window 2888 * focus... unless it has displayed other dialogs or popups that take 2889 * input focus, in which case the activity itself will not have focus 2890 * when the other windows have it. Likewise, the system may display 2891 * system-level windows (such as the status bar notification panel or 2892 * a system alert) which will temporarily take window input focus without 2893 * pausing the foreground activity. 2894 * 2895 * @param hasFocus Whether the window of this activity has focus. 2896 * 2897 * @see #hasWindowFocus() 2898 * @see #onResume 2899 * @see View#onWindowFocusChanged(boolean) 2900 */ 2901 public void onWindowFocusChanged(boolean hasFocus) { 2902 } 2903 2904 /** 2905 * Called when the main window associated with the activity has been 2906 * attached to the window manager. 2907 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2908 * for more information. 2909 * @see View#onAttachedToWindow 2910 */ 2911 public void onAttachedToWindow() { 2912 } 2913 2914 /** 2915 * Called when the main window associated with the activity has been 2916 * detached from the window manager. 2917 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2918 * for more information. 2919 * @see View#onDetachedFromWindow 2920 */ 2921 public void onDetachedFromWindow() { 2922 } 2923 2924 /** 2925 * Returns true if this activity's <em>main</em> window currently has window focus. 2926 * Note that this is not the same as the view itself having focus. 2927 * 2928 * @return True if this activity's main window currently has window focus. 2929 * 2930 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2931 */ 2932 public boolean hasWindowFocus() { 2933 Window w = getWindow(); 2934 if (w != null) { 2935 View d = w.getDecorView(); 2936 if (d != null) { 2937 return d.hasWindowFocus(); 2938 } 2939 } 2940 return false; 2941 } 2942 2943 /** 2944 * Called when the main window associated with the activity has been dismissed. 2945 * @hide 2946 */ 2947 @Override 2948 public void onWindowDismissed(boolean finishTask) { 2949 finish(finishTask ? FINISH_TASK_WITH_ACTIVITY : DONT_FINISH_TASK_WITH_ACTIVITY); 2950 } 2951 2952 2953 /** 2954 * Moves the activity from 2955 * {@link android.app.ActivityManager.StackId#FREEFORM_WORKSPACE_STACK_ID} to 2956 * {@link android.app.ActivityManager.StackId#FULLSCREEN_WORKSPACE_STACK_ID} stack. 2957 * 2958 * @hide 2959 */ 2960 @Override 2961 public void exitFreeformMode() throws RemoteException { 2962 ActivityManagerNative.getDefault().exitFreeformMode(mToken); 2963 } 2964 2965 /** Returns the current stack Id for the window. 2966 * @hide 2967 */ 2968 @Override 2969 public int getWindowStackId() throws RemoteException { 2970 return ActivityManagerNative.getDefault().getActivityStackId(mToken); 2971 } 2972 2973 /** 2974 * Puts the activity in picture-in-picture mode if the activity supports. 2975 * @see android.R.attr#supportsPictureInPicture 2976 * @hide 2977 */ 2978 @Override 2979 public void enterPictureInPictureModeIfPossible() { 2980 if (mActivityInfo.resizeMode == ActivityInfo.RESIZE_MODE_RESIZEABLE_AND_PIPABLE) { 2981 enterPictureInPictureMode(); 2982 } 2983 } 2984 2985 /** 2986 * Called to process key events. You can override this to intercept all 2987 * key events before they are dispatched to the window. Be sure to call 2988 * this implementation for key events that should be handled normally. 2989 * 2990 * @param event The key event. 2991 * 2992 * @return boolean Return true if this event was consumed. 2993 */ 2994 public boolean dispatchKeyEvent(KeyEvent event) { 2995 onUserInteraction(); 2996 2997 // Let action bars open menus in response to the menu key prioritized over 2998 // the window handling it 2999 final int keyCode = event.getKeyCode(); 3000 if (keyCode == KeyEvent.KEYCODE_MENU && 3001 mActionBar != null && mActionBar.onMenuKeyEvent(event)) { 3002 return true; 3003 } else if (event.isCtrlPressed() && 3004 event.getUnicodeChar(event.getMetaState() & ~KeyEvent.META_CTRL_MASK) == '<') { 3005 // Capture the Control-< and send focus to the ActionBar 3006 final int action = event.getAction(); 3007 if (action == KeyEvent.ACTION_DOWN) { 3008 final ActionBar actionBar = getActionBar(); 3009 if (actionBar != null && actionBar.isShowing() && actionBar.requestFocus()) { 3010 mEatKeyUpEvent = true; 3011 return true; 3012 } 3013 } else if (action == KeyEvent.ACTION_UP && mEatKeyUpEvent) { 3014 mEatKeyUpEvent = false; 3015 return true; 3016 } 3017 } 3018 3019 Window win = getWindow(); 3020 if (win.superDispatchKeyEvent(event)) { 3021 return true; 3022 } 3023 View decor = mDecor; 3024 if (decor == null) decor = win.getDecorView(); 3025 return event.dispatch(this, decor != null 3026 ? decor.getKeyDispatcherState() : null, this); 3027 } 3028 3029 /** 3030 * Called to process a key shortcut event. 3031 * You can override this to intercept all key shortcut events before they are 3032 * dispatched to the window. Be sure to call this implementation for key shortcut 3033 * events that should be handled normally. 3034 * 3035 * @param event The key shortcut event. 3036 * @return True if this event was consumed. 3037 */ 3038 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 3039 onUserInteraction(); 3040 if (getWindow().superDispatchKeyShortcutEvent(event)) { 3041 return true; 3042 } 3043 return onKeyShortcut(event.getKeyCode(), event); 3044 } 3045 3046 /** 3047 * Called to process touch screen events. You can override this to 3048 * intercept all touch screen events before they are dispatched to the 3049 * window. Be sure to call this implementation for touch screen events 3050 * that should be handled normally. 3051 * 3052 * @param ev The touch screen event. 3053 * 3054 * @return boolean Return true if this event was consumed. 3055 */ 3056 public boolean dispatchTouchEvent(MotionEvent ev) { 3057 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 3058 onUserInteraction(); 3059 } 3060 if (getWindow().superDispatchTouchEvent(ev)) { 3061 return true; 3062 } 3063 return onTouchEvent(ev); 3064 } 3065 3066 /** 3067 * Called to process trackball events. You can override this to 3068 * intercept all trackball events before they are dispatched to the 3069 * window. Be sure to call this implementation for trackball events 3070 * that should be handled normally. 3071 * 3072 * @param ev The trackball event. 3073 * 3074 * @return boolean Return true if this event was consumed. 3075 */ 3076 public boolean dispatchTrackballEvent(MotionEvent ev) { 3077 onUserInteraction(); 3078 if (getWindow().superDispatchTrackballEvent(ev)) { 3079 return true; 3080 } 3081 return onTrackballEvent(ev); 3082 } 3083 3084 /** 3085 * Called to process generic motion events. You can override this to 3086 * intercept all generic motion events before they are dispatched to the 3087 * window. Be sure to call this implementation for generic motion events 3088 * that should be handled normally. 3089 * 3090 * @param ev The generic motion event. 3091 * 3092 * @return boolean Return true if this event was consumed. 3093 */ 3094 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 3095 onUserInteraction(); 3096 if (getWindow().superDispatchGenericMotionEvent(ev)) { 3097 return true; 3098 } 3099 return onGenericMotionEvent(ev); 3100 } 3101 3102 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 3103 event.setClassName(getClass().getName()); 3104 event.setPackageName(getPackageName()); 3105 3106 LayoutParams params = getWindow().getAttributes(); 3107 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 3108 (params.height == LayoutParams.MATCH_PARENT); 3109 event.setFullScreen(isFullScreen); 3110 3111 CharSequence title = getTitle(); 3112 if (!TextUtils.isEmpty(title)) { 3113 event.getText().add(title); 3114 } 3115 3116 return true; 3117 } 3118 3119 /** 3120 * Default implementation of 3121 * {@link android.view.Window.Callback#onCreatePanelView} 3122 * for activities. This 3123 * simply returns null so that all panel sub-windows will have the default 3124 * menu behavior. 3125 */ 3126 @Nullable 3127 public View onCreatePanelView(int featureId) { 3128 return null; 3129 } 3130 3131 /** 3132 * Default implementation of 3133 * {@link android.view.Window.Callback#onCreatePanelMenu} 3134 * for activities. This calls through to the new 3135 * {@link #onCreateOptionsMenu} method for the 3136 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 3137 * so that subclasses of Activity don't need to deal with feature codes. 3138 */ 3139 public boolean onCreatePanelMenu(int featureId, Menu menu) { 3140 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 3141 boolean show = onCreateOptionsMenu(menu); 3142 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 3143 return show; 3144 } 3145 return false; 3146 } 3147 3148 /** 3149 * Default implementation of 3150 * {@link android.view.Window.Callback#onPreparePanel} 3151 * for activities. This 3152 * calls through to the new {@link #onPrepareOptionsMenu} method for the 3153 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 3154 * panel, so that subclasses of 3155 * Activity don't need to deal with feature codes. 3156 */ 3157 public boolean onPreparePanel(int featureId, View view, Menu menu) { 3158 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 3159 boolean goforit = onPrepareOptionsMenu(menu); 3160 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 3161 return goforit; 3162 } 3163 return true; 3164 } 3165 3166 /** 3167 * {@inheritDoc} 3168 * 3169 * @return The default implementation returns true. 3170 */ 3171 public boolean onMenuOpened(int featureId, Menu menu) { 3172 if (featureId == Window.FEATURE_ACTION_BAR) { 3173 initWindowDecorActionBar(); 3174 if (mActionBar != null) { 3175 mActionBar.dispatchMenuVisibilityChanged(true); 3176 } else { 3177 Log.e(TAG, "Tried to open action bar menu with no action bar"); 3178 } 3179 } 3180 return true; 3181 } 3182 3183 /** 3184 * Default implementation of 3185 * {@link android.view.Window.Callback#onMenuItemSelected} 3186 * for activities. This calls through to the new 3187 * {@link #onOptionsItemSelected} method for the 3188 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 3189 * panel, so that subclasses of 3190 * Activity don't need to deal with feature codes. 3191 */ 3192 public boolean onMenuItemSelected(int featureId, MenuItem item) { 3193 CharSequence titleCondensed = item.getTitleCondensed(); 3194 3195 switch (featureId) { 3196 case Window.FEATURE_OPTIONS_PANEL: 3197 // Put event logging here so it gets called even if subclass 3198 // doesn't call through to superclass's implmeentation of each 3199 // of these methods below 3200 if(titleCondensed != null) { 3201 EventLog.writeEvent(50000, 0, titleCondensed.toString()); 3202 } 3203 if (onOptionsItemSelected(item)) { 3204 return true; 3205 } 3206 if (mFragments.dispatchOptionsItemSelected(item)) { 3207 return true; 3208 } 3209 if (item.getItemId() == android.R.id.home && mActionBar != null && 3210 (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) { 3211 if (mParent == null) { 3212 return onNavigateUp(); 3213 } else { 3214 return mParent.onNavigateUpFromChild(this); 3215 } 3216 } 3217 return false; 3218 3219 case Window.FEATURE_CONTEXT_MENU: 3220 if(titleCondensed != null) { 3221 EventLog.writeEvent(50000, 1, titleCondensed.toString()); 3222 } 3223 if (onContextItemSelected(item)) { 3224 return true; 3225 } 3226 return mFragments.dispatchContextItemSelected(item); 3227 3228 default: 3229 return false; 3230 } 3231 } 3232 3233 /** 3234 * Default implementation of 3235 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 3236 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 3237 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 3238 * so that subclasses of Activity don't need to deal with feature codes. 3239 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 3240 * {@link #onContextMenuClosed(Menu)} will be called. 3241 */ 3242 public void onPanelClosed(int featureId, Menu menu) { 3243 switch (featureId) { 3244 case Window.FEATURE_OPTIONS_PANEL: 3245 mFragments.dispatchOptionsMenuClosed(menu); 3246 onOptionsMenuClosed(menu); 3247 break; 3248 3249 case Window.FEATURE_CONTEXT_MENU: 3250 onContextMenuClosed(menu); 3251 break; 3252 3253 case Window.FEATURE_ACTION_BAR: 3254 initWindowDecorActionBar(); 3255 mActionBar.dispatchMenuVisibilityChanged(false); 3256 break; 3257 } 3258 } 3259 3260 /** 3261 * Declare that the options menu has changed, so should be recreated. 3262 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 3263 * time it needs to be displayed. 3264 */ 3265 public void invalidateOptionsMenu() { 3266 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3267 (mActionBar == null || !mActionBar.invalidateOptionsMenu())) { 3268 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 3269 } 3270 } 3271 3272 /** 3273 * Initialize the contents of the Activity's standard options menu. You 3274 * should place your menu items in to <var>menu</var>. 3275 * 3276 * <p>This is only called once, the first time the options menu is 3277 * displayed. To update the menu every time it is displayed, see 3278 * {@link #onPrepareOptionsMenu}. 3279 * 3280 * <p>The default implementation populates the menu with standard system 3281 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 3282 * they will be correctly ordered with application-defined menu items. 3283 * Deriving classes should always call through to the base implementation. 3284 * 3285 * <p>You can safely hold on to <var>menu</var> (and any items created 3286 * from it), making modifications to it as desired, until the next 3287 * time onCreateOptionsMenu() is called. 3288 * 3289 * <p>When you add items to the menu, you can implement the Activity's 3290 * {@link #onOptionsItemSelected} method to handle them there. 3291 * 3292 * @param menu The options menu in which you place your items. 3293 * 3294 * @return You must return true for the menu to be displayed; 3295 * if you return false it will not be shown. 3296 * 3297 * @see #onPrepareOptionsMenu 3298 * @see #onOptionsItemSelected 3299 */ 3300 public boolean onCreateOptionsMenu(Menu menu) { 3301 if (mParent != null) { 3302 return mParent.onCreateOptionsMenu(menu); 3303 } 3304 return true; 3305 } 3306 3307 /** 3308 * Prepare the Screen's standard options menu to be displayed. This is 3309 * called right before the menu is shown, every time it is shown. You can 3310 * use this method to efficiently enable/disable items or otherwise 3311 * dynamically modify the contents. 3312 * 3313 * <p>The default implementation updates the system menu items based on the 3314 * activity's state. Deriving classes should always call through to the 3315 * base class implementation. 3316 * 3317 * @param menu The options menu as last shown or first initialized by 3318 * onCreateOptionsMenu(). 3319 * 3320 * @return You must return true for the menu to be displayed; 3321 * if you return false it will not be shown. 3322 * 3323 * @see #onCreateOptionsMenu 3324 */ 3325 public boolean onPrepareOptionsMenu(Menu menu) { 3326 if (mParent != null) { 3327 return mParent.onPrepareOptionsMenu(menu); 3328 } 3329 return true; 3330 } 3331 3332 /** 3333 * This hook is called whenever an item in your options menu is selected. 3334 * The default implementation simply returns false to have the normal 3335 * processing happen (calling the item's Runnable or sending a message to 3336 * its Handler as appropriate). You can use this method for any items 3337 * for which you would like to do processing without those other 3338 * facilities. 3339 * 3340 * <p>Derived classes should call through to the base class for it to 3341 * perform the default menu handling.</p> 3342 * 3343 * @param item The menu item that was selected. 3344 * 3345 * @return boolean Return false to allow normal menu processing to 3346 * proceed, true to consume it here. 3347 * 3348 * @see #onCreateOptionsMenu 3349 */ 3350 public boolean onOptionsItemSelected(MenuItem item) { 3351 if (mParent != null) { 3352 return mParent.onOptionsItemSelected(item); 3353 } 3354 return false; 3355 } 3356 3357 /** 3358 * This method is called whenever the user chooses to navigate Up within your application's 3359 * activity hierarchy from the action bar. 3360 * 3361 * <p>If the attribute {@link android.R.attr#parentActivityName parentActivityName} 3362 * was specified in the manifest for this activity or an activity-alias to it, 3363 * default Up navigation will be handled automatically. If any activity 3364 * along the parent chain requires extra Intent arguments, the Activity subclass 3365 * should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)} 3366 * to supply those arguments.</p> 3367 * 3368 * <p>See <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 3369 * from the developer guide and <a href="{@docRoot}design/patterns/navigation.html">Navigation</a> 3370 * from the design guide for more information about navigating within your app.</p> 3371 * 3372 * <p>See the {@link TaskStackBuilder} class and the Activity methods 3373 * {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and 3374 * {@link #navigateUpTo(Intent)} for help implementing custom Up navigation. 3375 * The AppNavigation sample application in the Android SDK is also available for reference.</p> 3376 * 3377 * @return true if Up navigation completed successfully and this Activity was finished, 3378 * false otherwise. 3379 */ 3380 public boolean onNavigateUp() { 3381 // Automatically handle hierarchical Up navigation if the proper 3382 // metadata is available. 3383 Intent upIntent = getParentActivityIntent(); 3384 if (upIntent != null) { 3385 if (mActivityInfo.taskAffinity == null) { 3386 // Activities with a null affinity are special; they really shouldn't 3387 // specify a parent activity intent in the first place. Just finish 3388 // the current activity and call it a day. 3389 finish(); 3390 } else if (shouldUpRecreateTask(upIntent)) { 3391 TaskStackBuilder b = TaskStackBuilder.create(this); 3392 onCreateNavigateUpTaskStack(b); 3393 onPrepareNavigateUpTaskStack(b); 3394 b.startActivities(); 3395 3396 // We can't finishAffinity if we have a result. 3397 // Fall back and simply finish the current activity instead. 3398 if (mResultCode != RESULT_CANCELED || mResultData != null) { 3399 // Tell the developer what's going on to avoid hair-pulling. 3400 Log.i(TAG, "onNavigateUp only finishing topmost activity to return a result"); 3401 finish(); 3402 } else { 3403 finishAffinity(); 3404 } 3405 } else { 3406 navigateUpTo(upIntent); 3407 } 3408 return true; 3409 } 3410 return false; 3411 } 3412 3413 /** 3414 * This is called when a child activity of this one attempts to navigate up. 3415 * The default implementation simply calls onNavigateUp() on this activity (the parent). 3416 * 3417 * @param child The activity making the call. 3418 */ 3419 public boolean onNavigateUpFromChild(Activity child) { 3420 return onNavigateUp(); 3421 } 3422 3423 /** 3424 * Define the synthetic task stack that will be generated during Up navigation from 3425 * a different task. 3426 * 3427 * <p>The default implementation of this method adds the parent chain of this activity 3428 * as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications 3429 * may choose to override this method to construct the desired task stack in a different 3430 * way.</p> 3431 * 3432 * <p>This method will be invoked by the default implementation of {@link #onNavigateUp()} 3433 * if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent 3434 * returned by {@link #getParentActivityIntent()}.</p> 3435 * 3436 * <p>Applications that wish to supply extra Intent parameters to the parent stack defined 3437 * by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}.</p> 3438 * 3439 * @param builder An empty TaskStackBuilder - the application should add intents representing 3440 * the desired task stack 3441 */ 3442 public void onCreateNavigateUpTaskStack(TaskStackBuilder builder) { 3443 builder.addParentStack(this); 3444 } 3445 3446 /** 3447 * Prepare the synthetic task stack that will be generated during Up navigation 3448 * from a different task. 3449 * 3450 * <p>This method receives the {@link TaskStackBuilder} with the constructed series of 3451 * Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}. 3452 * If any extra data should be added to these intents before launching the new task, 3453 * the application should override this method and add that data here.</p> 3454 * 3455 * @param builder A TaskStackBuilder that has been populated with Intents by 3456 * onCreateNavigateUpTaskStack. 3457 */ 3458 public void onPrepareNavigateUpTaskStack(TaskStackBuilder builder) { 3459 } 3460 3461 /** 3462 * This hook is called whenever the options menu is being closed (either by the user canceling 3463 * the menu with the back/menu button, or when an item is selected). 3464 * 3465 * @param menu The options menu as last shown or first initialized by 3466 * onCreateOptionsMenu(). 3467 */ 3468 public void onOptionsMenuClosed(Menu menu) { 3469 if (mParent != null) { 3470 mParent.onOptionsMenuClosed(menu); 3471 } 3472 } 3473 3474 /** 3475 * Programmatically opens the options menu. If the options menu is already 3476 * open, this method does nothing. 3477 */ 3478 public void openOptionsMenu() { 3479 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3480 (mActionBar == null || !mActionBar.openOptionsMenu())) { 3481 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 3482 } 3483 } 3484 3485 /** 3486 * Progammatically closes the options menu. If the options menu is already 3487 * closed, this method does nothing. 3488 */ 3489 public void closeOptionsMenu() { 3490 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL)) { 3491 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 3492 } 3493 } 3494 3495 /** 3496 * Called when a context menu for the {@code view} is about to be shown. 3497 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 3498 * time the context menu is about to be shown and should be populated for 3499 * the view (or item inside the view for {@link AdapterView} subclasses, 3500 * this can be found in the {@code menuInfo})). 3501 * <p> 3502 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 3503 * item has been selected. 3504 * <p> 3505 * It is not safe to hold onto the context menu after this method returns. 3506 * 3507 */ 3508 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 3509 } 3510 3511 /** 3512 * Registers a context menu to be shown for the given view (multiple views 3513 * can show the context menu). This method will set the 3514 * {@link OnCreateContextMenuListener} on the view to this activity, so 3515 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 3516 * called when it is time to show the context menu. 3517 * 3518 * @see #unregisterForContextMenu(View) 3519 * @param view The view that should show a context menu. 3520 */ 3521 public void registerForContextMenu(View view) { 3522 view.setOnCreateContextMenuListener(this); 3523 } 3524 3525 /** 3526 * Prevents a context menu to be shown for the given view. This method will remove the 3527 * {@link OnCreateContextMenuListener} on the view. 3528 * 3529 * @see #registerForContextMenu(View) 3530 * @param view The view that should stop showing a context menu. 3531 */ 3532 public void unregisterForContextMenu(View view) { 3533 view.setOnCreateContextMenuListener(null); 3534 } 3535 3536 /** 3537 * Programmatically opens the context menu for a particular {@code view}. 3538 * The {@code view} should have been added via 3539 * {@link #registerForContextMenu(View)}. 3540 * 3541 * @param view The view to show the context menu for. 3542 */ 3543 public void openContextMenu(View view) { 3544 view.showContextMenu(); 3545 } 3546 3547 /** 3548 * Programmatically closes the most recently opened context menu, if showing. 3549 */ 3550 public void closeContextMenu() { 3551 if (mWindow.hasFeature(Window.FEATURE_CONTEXT_MENU)) { 3552 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 3553 } 3554 } 3555 3556 /** 3557 * This hook is called whenever an item in a context menu is selected. The 3558 * default implementation simply returns false to have the normal processing 3559 * happen (calling the item's Runnable or sending a message to its Handler 3560 * as appropriate). You can use this method for any items for which you 3561 * would like to do processing without those other facilities. 3562 * <p> 3563 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 3564 * View that added this menu item. 3565 * <p> 3566 * Derived classes should call through to the base class for it to perform 3567 * the default menu handling. 3568 * 3569 * @param item The context menu item that was selected. 3570 * @return boolean Return false to allow normal context menu processing to 3571 * proceed, true to consume it here. 3572 */ 3573 public boolean onContextItemSelected(MenuItem item) { 3574 if (mParent != null) { 3575 return mParent.onContextItemSelected(item); 3576 } 3577 return false; 3578 } 3579 3580 /** 3581 * This hook is called whenever the context menu is being closed (either by 3582 * the user canceling the menu with the back/menu button, or when an item is 3583 * selected). 3584 * 3585 * @param menu The context menu that is being closed. 3586 */ 3587 public void onContextMenuClosed(Menu menu) { 3588 if (mParent != null) { 3589 mParent.onContextMenuClosed(menu); 3590 } 3591 } 3592 3593 /** 3594 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 3595 */ 3596 @Deprecated 3597 protected Dialog onCreateDialog(int id) { 3598 return null; 3599 } 3600 3601 /** 3602 * Callback for creating dialogs that are managed (saved and restored) for you 3603 * by the activity. The default implementation calls through to 3604 * {@link #onCreateDialog(int)} for compatibility. 3605 * 3606 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3607 * or later, consider instead using a {@link DialogFragment} instead.</em> 3608 * 3609 * <p>If you use {@link #showDialog(int)}, the activity will call through to 3610 * this method the first time, and hang onto it thereafter. Any dialog 3611 * that is created by this method will automatically be saved and restored 3612 * for you, including whether it is showing. 3613 * 3614 * <p>If you would like the activity to manage saving and restoring dialogs 3615 * for you, you should override this method and handle any ids that are 3616 * passed to {@link #showDialog}. 3617 * 3618 * <p>If you would like an opportunity to prepare your dialog before it is shown, 3619 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 3620 * 3621 * @param id The id of the dialog. 3622 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3623 * @return The dialog. If you return null, the dialog will not be created. 3624 * 3625 * @see #onPrepareDialog(int, Dialog, Bundle) 3626 * @see #showDialog(int, Bundle) 3627 * @see #dismissDialog(int) 3628 * @see #removeDialog(int) 3629 * 3630 * @deprecated Use the new {@link DialogFragment} class with 3631 * {@link FragmentManager} instead; this is also 3632 * available on older platforms through the Android compatibility package. 3633 */ 3634 @Nullable 3635 @Deprecated 3636 protected Dialog onCreateDialog(int id, Bundle args) { 3637 return onCreateDialog(id); 3638 } 3639 3640 /** 3641 * @deprecated Old no-arguments version of 3642 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 3643 */ 3644 @Deprecated 3645 protected void onPrepareDialog(int id, Dialog dialog) { 3646 dialog.setOwnerActivity(this); 3647 } 3648 3649 /** 3650 * Provides an opportunity to prepare a managed dialog before it is being 3651 * shown. The default implementation calls through to 3652 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 3653 * 3654 * <p> 3655 * Override this if you need to update a managed dialog based on the state 3656 * of the application each time it is shown. For example, a time picker 3657 * dialog might want to be updated with the current time. You should call 3658 * through to the superclass's implementation. The default implementation 3659 * will set this Activity as the owner activity on the Dialog. 3660 * 3661 * @param id The id of the managed dialog. 3662 * @param dialog The dialog. 3663 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3664 * @see #onCreateDialog(int, Bundle) 3665 * @see #showDialog(int) 3666 * @see #dismissDialog(int) 3667 * @see #removeDialog(int) 3668 * 3669 * @deprecated Use the new {@link DialogFragment} class with 3670 * {@link FragmentManager} instead; this is also 3671 * available on older platforms through the Android compatibility package. 3672 */ 3673 @Deprecated 3674 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 3675 onPrepareDialog(id, dialog); 3676 } 3677 3678 /** 3679 * Simple version of {@link #showDialog(int, Bundle)} that does not 3680 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 3681 * with null arguments. 3682 * 3683 * @deprecated Use the new {@link DialogFragment} class with 3684 * {@link FragmentManager} instead; this is also 3685 * available on older platforms through the Android compatibility package. 3686 */ 3687 @Deprecated 3688 public final void showDialog(int id) { 3689 showDialog(id, null); 3690 } 3691 3692 /** 3693 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 3694 * will be made with the same id the first time this is called for a given 3695 * id. From thereafter, the dialog will be automatically saved and restored. 3696 * 3697 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3698 * or later, consider instead using a {@link DialogFragment} instead.</em> 3699 * 3700 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 3701 * be made to provide an opportunity to do any timely preparation. 3702 * 3703 * @param id The id of the managed dialog. 3704 * @param args Arguments to pass through to the dialog. These will be saved 3705 * and restored for you. Note that if the dialog is already created, 3706 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 3707 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 3708 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 3709 * @return Returns true if the Dialog was created; false is returned if 3710 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 3711 * 3712 * @see Dialog 3713 * @see #onCreateDialog(int, Bundle) 3714 * @see #onPrepareDialog(int, Dialog, Bundle) 3715 * @see #dismissDialog(int) 3716 * @see #removeDialog(int) 3717 * 3718 * @deprecated Use the new {@link DialogFragment} class with 3719 * {@link FragmentManager} instead; this is also 3720 * available on older platforms through the Android compatibility package. 3721 */ 3722 @Nullable 3723 @Deprecated 3724 public final boolean showDialog(int id, Bundle args) { 3725 if (mManagedDialogs == null) { 3726 mManagedDialogs = new SparseArray<ManagedDialog>(); 3727 } 3728 ManagedDialog md = mManagedDialogs.get(id); 3729 if (md == null) { 3730 md = new ManagedDialog(); 3731 md.mDialog = createDialog(id, null, args); 3732 if (md.mDialog == null) { 3733 return false; 3734 } 3735 mManagedDialogs.put(id, md); 3736 } 3737 3738 md.mArgs = args; 3739 onPrepareDialog(id, md.mDialog, args); 3740 md.mDialog.show(); 3741 return true; 3742 } 3743 3744 /** 3745 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 3746 * 3747 * @param id The id of the managed dialog. 3748 * 3749 * @throws IllegalArgumentException if the id was not previously shown via 3750 * {@link #showDialog(int)}. 3751 * 3752 * @see #onCreateDialog(int, Bundle) 3753 * @see #onPrepareDialog(int, Dialog, Bundle) 3754 * @see #showDialog(int) 3755 * @see #removeDialog(int) 3756 * 3757 * @deprecated Use the new {@link DialogFragment} class with 3758 * {@link FragmentManager} instead; this is also 3759 * available on older platforms through the Android compatibility package. 3760 */ 3761 @Deprecated 3762 public final void dismissDialog(int id) { 3763 if (mManagedDialogs == null) { 3764 throw missingDialog(id); 3765 } 3766 3767 final ManagedDialog md = mManagedDialogs.get(id); 3768 if (md == null) { 3769 throw missingDialog(id); 3770 } 3771 md.mDialog.dismiss(); 3772 } 3773 3774 /** 3775 * Creates an exception to throw if a user passed in a dialog id that is 3776 * unexpected. 3777 */ 3778 private IllegalArgumentException missingDialog(int id) { 3779 return new IllegalArgumentException("no dialog with id " + id + " was ever " 3780 + "shown via Activity#showDialog"); 3781 } 3782 3783 /** 3784 * Removes any internal references to a dialog managed by this Activity. 3785 * If the dialog is showing, it will dismiss it as part of the clean up. 3786 * 3787 * <p>This can be useful if you know that you will never show a dialog again and 3788 * want to avoid the overhead of saving and restoring it in the future. 3789 * 3790 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 3791 * will not throw an exception if you try to remove an ID that does not 3792 * currently have an associated dialog.</p> 3793 * 3794 * @param id The id of the managed dialog. 3795 * 3796 * @see #onCreateDialog(int, Bundle) 3797 * @see #onPrepareDialog(int, Dialog, Bundle) 3798 * @see #showDialog(int) 3799 * @see #dismissDialog(int) 3800 * 3801 * @deprecated Use the new {@link DialogFragment} class with 3802 * {@link FragmentManager} instead; this is also 3803 * available on older platforms through the Android compatibility package. 3804 */ 3805 @Deprecated 3806 public final void removeDialog(int id) { 3807 if (mManagedDialogs != null) { 3808 final ManagedDialog md = mManagedDialogs.get(id); 3809 if (md != null) { 3810 md.mDialog.dismiss(); 3811 mManagedDialogs.remove(id); 3812 } 3813 } 3814 } 3815 3816 /** 3817 * This hook is called when the user signals the desire to start a search. 3818 * 3819 * <p>You can use this function as a simple way to launch the search UI, in response to a 3820 * menu item, search button, or other widgets within your activity. Unless overidden, 3821 * calling this function is the same as calling 3822 * {@link #startSearch startSearch(null, false, null, false)}, which launches 3823 * search for the current activity as specified in its manifest, see {@link SearchManager}. 3824 * 3825 * <p>You can override this function to force global search, e.g. in response to a dedicated 3826 * search key, or to block search entirely (by simply returning false). 3827 * 3828 * <p>Note: when running in a {@link Configuration#UI_MODE_TYPE_TELEVISION}, the default 3829 * implementation changes to simply return false and you must supply your own custom 3830 * implementation if you want to support search.</p> 3831 * 3832 * @param searchEvent The {@link SearchEvent} that signaled this search. 3833 * @return Returns {@code true} if search launched, and {@code false} if the activity does 3834 * not respond to search. The default implementation always returns {@code true}, except 3835 * when in {@link Configuration#UI_MODE_TYPE_TELEVISION} mode where it returns false. 3836 * 3837 * @see android.app.SearchManager 3838 */ 3839 public boolean onSearchRequested(@Nullable SearchEvent searchEvent) { 3840 mSearchEvent = searchEvent; 3841 boolean result = onSearchRequested(); 3842 mSearchEvent = null; 3843 return result; 3844 } 3845 3846 /** 3847 * @see #onSearchRequested(SearchEvent) 3848 */ 3849 public boolean onSearchRequested() { 3850 if ((getResources().getConfiguration().uiMode&Configuration.UI_MODE_TYPE_MASK) 3851 != Configuration.UI_MODE_TYPE_TELEVISION) { 3852 startSearch(null, false, null, false); 3853 return true; 3854 } else { 3855 return false; 3856 } 3857 } 3858 3859 /** 3860 * During the onSearchRequested() callbacks, this function will return the 3861 * {@link SearchEvent} that triggered the callback, if it exists. 3862 * 3863 * @return SearchEvent The SearchEvent that triggered the {@link 3864 * #onSearchRequested} callback. 3865 */ 3866 public final SearchEvent getSearchEvent() { 3867 return mSearchEvent; 3868 } 3869 3870 /** 3871 * This hook is called to launch the search UI. 3872 * 3873 * <p>It is typically called from onSearchRequested(), either directly from 3874 * Activity.onSearchRequested() or from an overridden version in any given 3875 * Activity. If your goal is simply to activate search, it is preferred to call 3876 * onSearchRequested(), which may have been overridden elsewhere in your Activity. If your goal 3877 * is to inject specific data such as context data, it is preferred to <i>override</i> 3878 * onSearchRequested(), so that any callers to it will benefit from the override. 3879 * 3880 * @param initialQuery Any non-null non-empty string will be inserted as 3881 * pre-entered text in the search query box. 3882 * @param selectInitialQuery If true, the initial query will be preselected, which means that 3883 * any further typing will replace it. This is useful for cases where an entire pre-formed 3884 * query is being inserted. If false, the selection point will be placed at the end of the 3885 * inserted query. This is useful when the inserted query is text that the user entered, 3886 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 3887 * if initialQuery is a non-empty string.</i> 3888 * @param appSearchData An application can insert application-specific 3889 * context here, in order to improve quality or specificity of its own 3890 * searches. This data will be returned with SEARCH intent(s). Null if 3891 * no extra data is required. 3892 * @param globalSearch If false, this will only launch the search that has been specifically 3893 * defined by the application (which is usually defined as a local search). If no default 3894 * search is defined in the current application or activity, global search will be launched. 3895 * If true, this will always launch a platform-global (e.g. web-based) search instead. 3896 * 3897 * @see android.app.SearchManager 3898 * @see #onSearchRequested 3899 */ 3900 public void startSearch(@Nullable String initialQuery, boolean selectInitialQuery, 3901 @Nullable Bundle appSearchData, boolean globalSearch) { 3902 ensureSearchManager(); 3903 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 3904 appSearchData, globalSearch); 3905 } 3906 3907 /** 3908 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 3909 * the search dialog. Made available for testing purposes. 3910 * 3911 * @param query The query to trigger. If empty, the request will be ignored. 3912 * @param appSearchData An application can insert application-specific 3913 * context here, in order to improve quality or specificity of its own 3914 * searches. This data will be returned with SEARCH intent(s). Null if 3915 * no extra data is required. 3916 */ 3917 public void triggerSearch(String query, @Nullable Bundle appSearchData) { 3918 ensureSearchManager(); 3919 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 3920 } 3921 3922 /** 3923 * Request that key events come to this activity. Use this if your 3924 * activity has no views with focus, but the activity still wants 3925 * a chance to process key events. 3926 * 3927 * @see android.view.Window#takeKeyEvents 3928 */ 3929 public void takeKeyEvents(boolean get) { 3930 getWindow().takeKeyEvents(get); 3931 } 3932 3933 /** 3934 * Enable extended window features. This is a convenience for calling 3935 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 3936 * 3937 * @param featureId The desired feature as defined in 3938 * {@link android.view.Window}. 3939 * @return Returns true if the requested feature is supported and now 3940 * enabled. 3941 * 3942 * @see android.view.Window#requestFeature 3943 */ 3944 public final boolean requestWindowFeature(int featureId) { 3945 return getWindow().requestFeature(featureId); 3946 } 3947 3948 /** 3949 * Convenience for calling 3950 * {@link android.view.Window#setFeatureDrawableResource}. 3951 */ 3952 public final void setFeatureDrawableResource(int featureId, @DrawableRes int resId) { 3953 getWindow().setFeatureDrawableResource(featureId, resId); 3954 } 3955 3956 /** 3957 * Convenience for calling 3958 * {@link android.view.Window#setFeatureDrawableUri}. 3959 */ 3960 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3961 getWindow().setFeatureDrawableUri(featureId, uri); 3962 } 3963 3964 /** 3965 * Convenience for calling 3966 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3967 */ 3968 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3969 getWindow().setFeatureDrawable(featureId, drawable); 3970 } 3971 3972 /** 3973 * Convenience for calling 3974 * {@link android.view.Window#setFeatureDrawableAlpha}. 3975 */ 3976 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3977 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3978 } 3979 3980 /** 3981 * Convenience for calling 3982 * {@link android.view.Window#getLayoutInflater}. 3983 */ 3984 @NonNull 3985 public LayoutInflater getLayoutInflater() { 3986 return getWindow().getLayoutInflater(); 3987 } 3988 3989 /** 3990 * Returns a {@link MenuInflater} with this context. 3991 */ 3992 @NonNull 3993 public MenuInflater getMenuInflater() { 3994 // Make sure that action views can get an appropriate theme. 3995 if (mMenuInflater == null) { 3996 initWindowDecorActionBar(); 3997 if (mActionBar != null) { 3998 mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this); 3999 } else { 4000 mMenuInflater = new MenuInflater(this); 4001 } 4002 } 4003 return mMenuInflater; 4004 } 4005 4006 @Override 4007 public void setTheme(int resid) { 4008 super.setTheme(resid); 4009 mWindow.setTheme(resid); 4010 } 4011 4012 @Override 4013 protected void onApplyThemeResource(Resources.Theme theme, @StyleRes int resid, 4014 boolean first) { 4015 if (mParent == null) { 4016 super.onApplyThemeResource(theme, resid, first); 4017 } else { 4018 try { 4019 theme.setTo(mParent.getTheme()); 4020 } catch (Exception e) { 4021 // Empty 4022 } 4023 theme.applyStyle(resid, false); 4024 } 4025 4026 // Get the primary color and update the TaskDescription for this activity 4027 TypedArray a = theme.obtainStyledAttributes( 4028 com.android.internal.R.styleable.ActivityTaskDescription); 4029 if (mTaskDescription.getPrimaryColor() == 0) { 4030 int colorPrimary = a.getColor( 4031 com.android.internal.R.styleable.ActivityTaskDescription_colorPrimary, 0); 4032 if (colorPrimary != 0 && Color.alpha(colorPrimary) == 0xFF) { 4033 mTaskDescription.setPrimaryColor(colorPrimary); 4034 } 4035 } 4036 // For dev-preview only. 4037 if (mTaskDescription.getBackgroundColor() == 0) { 4038 int colorBackground = a.getColor( 4039 com.android.internal.R.styleable.ActivityTaskDescription_colorBackground, 0); 4040 if (colorBackground != 0 && Color.alpha(colorBackground) == 0xFF) { 4041 mTaskDescription.setBackgroundColor(colorBackground); 4042 } 4043 } 4044 a.recycle(); 4045 setTaskDescription(mTaskDescription); 4046 } 4047 4048 /** 4049 * Requests permissions to be granted to this application. These permissions 4050 * must be requested in your manifest, they should not be granted to your app, 4051 * and they should have protection level {@link android.content.pm.PermissionInfo 4052 * #PROTECTION_DANGEROUS dangerous}, regardless whether they are declared by 4053 * the platform or a third-party app. 4054 * <p> 4055 * Normal permissions {@link android.content.pm.PermissionInfo#PROTECTION_NORMAL} 4056 * are granted at install time if requested in the manifest. Signature permissions 4057 * {@link android.content.pm.PermissionInfo#PROTECTION_SIGNATURE} are granted at 4058 * install time if requested in the manifest and the signature of your app matches 4059 * the signature of the app declaring the permissions. 4060 * </p> 4061 * <p> 4062 * If your app does not have the requested permissions the user will be presented 4063 * with UI for accepting them. After the user has accepted or rejected the 4064 * requested permissions you will receive a callback on {@link 4065 * #onRequestPermissionsResult(int, String[], int[])} reporting whether the 4066 * permissions were granted or not. 4067 * </p> 4068 * <p> 4069 * Note that requesting a permission does not guarantee it will be granted and 4070 * your app should be able to run without having this permission. 4071 * </p> 4072 * <p> 4073 * This method may start an activity allowing the user to choose which permissions 4074 * to grant and which to reject. Hence, you should be prepared that your activity 4075 * may be paused and resumed. Further, granting some permissions may require 4076 * a restart of you application. In such a case, the system will recreate the 4077 * activity stack before delivering the result to {@link 4078 * #onRequestPermissionsResult(int, String[], int[])}. 4079 * </p> 4080 * <p> 4081 * When checking whether you have a permission you should use {@link 4082 * #checkSelfPermission(String)}. 4083 * </p> 4084 * <p> 4085 * Calling this API for permissions already granted to your app would show UI 4086 * to the user to decide whether the app can still hold these permissions. This 4087 * can be useful if the way your app uses data guarded by the permissions 4088 * changes significantly. 4089 * </p> 4090 * <p> 4091 * You cannot request a permission if your activity sets {@link 4092 * android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 4093 * <code>true</code> because in this case the activity would not receive 4094 * result callbacks including {@link #onRequestPermissionsResult(int, String[], int[])}. 4095 * </p> 4096 * <p> 4097 * The <a href="http://developer.android.com/samples/RuntimePermissions/index.html"> 4098 * RuntimePermissions</a> sample app demonstrates how to use this method to 4099 * request permissions at run time. 4100 * </p> 4101 * 4102 * @param permissions The requested permissions. Must me non-null and not empty. 4103 * @param requestCode Application specific request code to match with a result 4104 * reported to {@link #onRequestPermissionsResult(int, String[], int[])}. 4105 * Should be >= 0. 4106 * 4107 * @see #onRequestPermissionsResult(int, String[], int[]) 4108 * @see #checkSelfPermission(String) 4109 * @see #shouldShowRequestPermissionRationale(String) 4110 */ 4111 public final void requestPermissions(@NonNull String[] permissions, int requestCode) { 4112 if (mHasCurrentPermissionsRequest) { 4113 Log.w(TAG, "Can reqeust only one set of permissions at a time"); 4114 // Dispatch the callback with empty arrays which means a cancellation. 4115 onRequestPermissionsResult(requestCode, new String[0], new int[0]); 4116 return; 4117 } 4118 Intent intent = getPackageManager().buildRequestPermissionsIntent(permissions); 4119 startActivityForResult(REQUEST_PERMISSIONS_WHO_PREFIX, intent, requestCode, null); 4120 mHasCurrentPermissionsRequest = true; 4121 } 4122 4123 /** 4124 * Callback for the result from requesting permissions. This method 4125 * is invoked for every call on {@link #requestPermissions(String[], int)}. 4126 * <p> 4127 * <strong>Note:</strong> It is possible that the permissions request interaction 4128 * with the user is interrupted. In this case you will receive empty permissions 4129 * and results arrays which should be treated as a cancellation. 4130 * </p> 4131 * 4132 * @param requestCode The request code passed in {@link #requestPermissions(String[], int)}. 4133 * @param permissions The requested permissions. Never null. 4134 * @param grantResults The grant results for the corresponding permissions 4135 * which is either {@link android.content.pm.PackageManager#PERMISSION_GRANTED} 4136 * or {@link android.content.pm.PackageManager#PERMISSION_DENIED}. Never null. 4137 * 4138 * @see #requestPermissions(String[], int) 4139 */ 4140 public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, 4141 @NonNull int[] grantResults) { 4142 /* callback - no nothing */ 4143 } 4144 4145 /** 4146 * Gets whether you should show UI with rationale for requesting a permission. 4147 * You should do this only if you do not have the permission and the context in 4148 * which the permission is requested does not clearly communicate to the user 4149 * what would be the benefit from granting this permission. 4150 * <p> 4151 * For example, if you write a camera app, requesting the camera permission 4152 * would be expected by the user and no rationale for why it is requested is 4153 * needed. If however, the app needs location for tagging photos then a non-tech 4154 * savvy user may wonder how location is related to taking photos. In this case 4155 * you may choose to show UI with rationale of requesting this permission. 4156 * </p> 4157 * 4158 * @param permission A permission your app wants to request. 4159 * @return Whether you can show permission rationale UI. 4160 * 4161 * @see #checkSelfPermission(String) 4162 * @see #requestPermissions(String[], int) 4163 * @see #onRequestPermissionsResult(int, String[], int[]) 4164 */ 4165 public boolean shouldShowRequestPermissionRationale(@NonNull String permission) { 4166 return getPackageManager().shouldShowRequestPermissionRationale(permission); 4167 } 4168 4169 /** 4170 * Same as calling {@link #startActivityForResult(Intent, int, Bundle)} 4171 * with no options. 4172 * 4173 * @param intent The intent to start. 4174 * @param requestCode If >= 0, this code will be returned in 4175 * onActivityResult() when the activity exits. 4176 * 4177 * @throws android.content.ActivityNotFoundException 4178 * 4179 * @see #startActivity 4180 */ 4181 public void startActivityForResult(@RequiresPermission Intent intent, int requestCode) { 4182 startActivityForResult(intent, requestCode, null); 4183 } 4184 4185 /** 4186 * Launch an activity for which you would like a result when it finished. 4187 * When this activity exits, your 4188 * onActivityResult() method will be called with the given requestCode. 4189 * Using a negative requestCode is the same as calling 4190 * {@link #startActivity} (the activity is not launched as a sub-activity). 4191 * 4192 * <p>Note that this method should only be used with Intent protocols 4193 * that are defined to return a result. In other protocols (such as 4194 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 4195 * not get the result when you expect. For example, if the activity you 4196 * are launching uses the singleTask launch mode, it will not run in your 4197 * task and thus you will immediately receive a cancel result. 4198 * 4199 * <p>As a special case, if you call startActivityForResult() with a requestCode 4200 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 4201 * activity, then your window will not be displayed until a result is 4202 * returned back from the started activity. This is to avoid visible 4203 * flickering when redirecting to another activity. 4204 * 4205 * <p>This method throws {@link android.content.ActivityNotFoundException} 4206 * if there was no Activity found to run the given Intent. 4207 * 4208 * @param intent The intent to start. 4209 * @param requestCode If >= 0, this code will be returned in 4210 * onActivityResult() when the activity exits. 4211 * @param options Additional options for how the Activity should be started. 4212 * See {@link android.content.Context#startActivity(Intent, Bundle) 4213 * Context.startActivity(Intent, Bundle)} for more details. 4214 * 4215 * @throws android.content.ActivityNotFoundException 4216 * 4217 * @see #startActivity 4218 */ 4219 public void startActivityForResult(@RequiresPermission Intent intent, int requestCode, 4220 @Nullable Bundle options) { 4221 if (mParent == null) { 4222 options = transferSpringboardActivityOptions(options); 4223 Instrumentation.ActivityResult ar = 4224 mInstrumentation.execStartActivity( 4225 this, mMainThread.getApplicationThread(), mToken, this, 4226 intent, requestCode, options); 4227 if (ar != null) { 4228 mMainThread.sendActivityResult( 4229 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 4230 ar.getResultData()); 4231 } 4232 if (requestCode >= 0) { 4233 // If this start is requesting a result, we can avoid making 4234 // the activity visible until the result is received. Setting 4235 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4236 // activity hidden during this time, to avoid flickering. 4237 // This can only be done when a result is requested because 4238 // that guarantees we will get information back when the 4239 // activity is finished, no matter what happens to it. 4240 mStartedActivity = true; 4241 } 4242 4243 cancelInputsAndStartExitTransition(options); 4244 // TODO Consider clearing/flushing other event sources and events for child windows. 4245 } else { 4246 if (options != null) { 4247 mParent.startActivityFromChild(this, intent, requestCode, options); 4248 } else { 4249 // Note we want to go through this method for compatibility with 4250 // existing applications that may have overridden it. 4251 mParent.startActivityFromChild(this, intent, requestCode); 4252 } 4253 } 4254 } 4255 4256 /** 4257 * Cancels pending inputs and if an Activity Transition is to be run, starts the transition. 4258 * 4259 * @param options The ActivityOptions bundle used to start an Activity. 4260 */ 4261 private void cancelInputsAndStartExitTransition(Bundle options) { 4262 final View decor = mWindow != null ? mWindow.peekDecorView() : null; 4263 if (decor != null) { 4264 decor.cancelPendingInputEvents(); 4265 } 4266 if (options != null && !isTopOfTask()) { 4267 mActivityTransitionState.startExitOutTransition(this, options); 4268 } 4269 } 4270 4271 private Bundle transferSpringboardActivityOptions(Bundle options) { 4272 if (options == null && (mWindow != null && !mWindow.isActive())) { 4273 return mActivityTransitionState.transferEnterActivityOptions(); 4274 } else { 4275 return options; 4276 } 4277 } 4278 4279 /** 4280 * @hide Implement to provide correct calling token. 4281 */ 4282 public void startActivityForResultAsUser(Intent intent, int requestCode, UserHandle user) { 4283 startActivityForResultAsUser(intent, requestCode, null, user); 4284 } 4285 4286 /** 4287 * @hide Implement to provide correct calling token. 4288 */ 4289 public void startActivityForResultAsUser(Intent intent, int requestCode, 4290 @Nullable Bundle options, UserHandle user) { 4291 if (mParent != null) { 4292 throw new RuntimeException("Can't be called from a child"); 4293 } 4294 options = transferSpringboardActivityOptions(options); 4295 Instrumentation.ActivityResult ar = mInstrumentation.execStartActivity( 4296 this, mMainThread.getApplicationThread(), mToken, this, intent, requestCode, 4297 options, user); 4298 if (ar != null) { 4299 mMainThread.sendActivityResult( 4300 mToken, mEmbeddedID, requestCode, ar.getResultCode(), ar.getResultData()); 4301 } 4302 if (requestCode >= 0) { 4303 // If this start is requesting a result, we can avoid making 4304 // the activity visible until the result is received. Setting 4305 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4306 // activity hidden during this time, to avoid flickering. 4307 // This can only be done when a result is requested because 4308 // that guarantees we will get information back when the 4309 // activity is finished, no matter what happens to it. 4310 mStartedActivity = true; 4311 } 4312 4313 cancelInputsAndStartExitTransition(options); 4314 } 4315 4316 /** 4317 * @hide Implement to provide correct calling token. 4318 */ 4319 public void startActivityAsUser(Intent intent, UserHandle user) { 4320 startActivityAsUser(intent, null, user); 4321 } 4322 4323 /** 4324 * @hide Implement to provide correct calling token. 4325 */ 4326 public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) { 4327 if (mParent != null) { 4328 throw new RuntimeException("Can't be called from a child"); 4329 } 4330 options = transferSpringboardActivityOptions(options); 4331 Instrumentation.ActivityResult ar = 4332 mInstrumentation.execStartActivity( 4333 this, mMainThread.getApplicationThread(), mToken, this, 4334 intent, -1, options, user); 4335 if (ar != null) { 4336 mMainThread.sendActivityResult( 4337 mToken, mEmbeddedID, -1, ar.getResultCode(), 4338 ar.getResultData()); 4339 } 4340 cancelInputsAndStartExitTransition(options); 4341 } 4342 4343 /** 4344 * Start a new activity as if it was started by the activity that started our 4345 * current activity. This is for the resolver and chooser activities, which operate 4346 * as intermediaries that dispatch their intent to the target the user selects -- to 4347 * do this, they must perform all security checks including permission grants as if 4348 * their launch had come from the original activity. 4349 * @param intent The Intent to start. 4350 * @param options ActivityOptions or null. 4351 * @param ignoreTargetSecurity If true, the activity manager will not check whether the 4352 * caller it is doing the start is, is actually allowed to start the target activity. 4353 * If you set this to true, you must set an explicit component in the Intent and do any 4354 * appropriate security checks yourself. 4355 * @param userId The user the new activity should run as. 4356 * @hide 4357 */ 4358 public void startActivityAsCaller(Intent intent, @Nullable Bundle options, 4359 boolean ignoreTargetSecurity, int userId) { 4360 if (mParent != null) { 4361 throw new RuntimeException("Can't be called from a child"); 4362 } 4363 options = transferSpringboardActivityOptions(options); 4364 Instrumentation.ActivityResult ar = 4365 mInstrumentation.execStartActivityAsCaller( 4366 this, mMainThread.getApplicationThread(), mToken, this, 4367 intent, -1, options, ignoreTargetSecurity, userId); 4368 if (ar != null) { 4369 mMainThread.sendActivityResult( 4370 mToken, mEmbeddedID, -1, ar.getResultCode(), 4371 ar.getResultData()); 4372 } 4373 cancelInputsAndStartExitTransition(options); 4374 } 4375 4376 /** 4377 * Same as calling {@link #startIntentSenderForResult(IntentSender, int, 4378 * Intent, int, int, int, Bundle)} with no options. 4379 * 4380 * @param intent The IntentSender to launch. 4381 * @param requestCode If >= 0, this code will be returned in 4382 * onActivityResult() when the activity exits. 4383 * @param fillInIntent If non-null, this will be provided as the 4384 * intent parameter to {@link IntentSender#sendIntent}. 4385 * @param flagsMask Intent flags in the original IntentSender that you 4386 * would like to change. 4387 * @param flagsValues Desired values for any bits set in 4388 * <var>flagsMask</var> 4389 * @param extraFlags Always set to 0. 4390 */ 4391 public void startIntentSenderForResult(IntentSender intent, int requestCode, 4392 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4393 throws IntentSender.SendIntentException { 4394 startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, 4395 flagsValues, extraFlags, null); 4396 } 4397 4398 /** 4399 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 4400 * to use a IntentSender to describe the activity to be started. If 4401 * the IntentSender is for an activity, that activity will be started 4402 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 4403 * here; otherwise, its associated action will be executed (such as 4404 * sending a broadcast) as if you had called 4405 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 4406 * 4407 * @param intent The IntentSender to launch. 4408 * @param requestCode If >= 0, this code will be returned in 4409 * onActivityResult() when the activity exits. 4410 * @param fillInIntent If non-null, this will be provided as the 4411 * intent parameter to {@link IntentSender#sendIntent}. 4412 * @param flagsMask Intent flags in the original IntentSender that you 4413 * would like to change. 4414 * @param flagsValues Desired values for any bits set in 4415 * <var>flagsMask</var> 4416 * @param extraFlags Always set to 0. 4417 * @param options Additional options for how the Activity should be started. 4418 * See {@link android.content.Context#startActivity(Intent, Bundle) 4419 * Context.startActivity(Intent, Bundle)} for more details. If options 4420 * have also been supplied by the IntentSender, options given here will 4421 * override any that conflict with those given by the IntentSender. 4422 */ 4423 public void startIntentSenderForResult(IntentSender intent, int requestCode, 4424 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4425 Bundle options) throws IntentSender.SendIntentException { 4426 if (mParent == null) { 4427 startIntentSenderForResultInner(intent, mEmbeddedID, requestCode, fillInIntent, 4428 flagsMask, flagsValues, options); 4429 } else if (options != null) { 4430 mParent.startIntentSenderFromChild(this, intent, requestCode, 4431 fillInIntent, flagsMask, flagsValues, extraFlags, options); 4432 } else { 4433 // Note we want to go through this call for compatibility with 4434 // existing applications that may have overridden the method. 4435 mParent.startIntentSenderFromChild(this, intent, requestCode, 4436 fillInIntent, flagsMask, flagsValues, extraFlags); 4437 } 4438 } 4439 4440 private void startIntentSenderForResultInner(IntentSender intent, String who, int requestCode, 4441 Intent fillInIntent, int flagsMask, int flagsValues, 4442 Bundle options) 4443 throws IntentSender.SendIntentException { 4444 try { 4445 String resolvedType = null; 4446 if (fillInIntent != null) { 4447 fillInIntent.migrateExtraStreamToClipData(); 4448 fillInIntent.prepareToLeaveProcess(this); 4449 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 4450 } 4451 int result = ActivityManagerNative.getDefault() 4452 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 4453 fillInIntent, resolvedType, mToken, who, 4454 requestCode, flagsMask, flagsValues, options); 4455 if (result == ActivityManager.START_CANCELED) { 4456 throw new IntentSender.SendIntentException(); 4457 } 4458 Instrumentation.checkStartActivityResult(result, null); 4459 } catch (RemoteException e) { 4460 } 4461 if (requestCode >= 0) { 4462 // If this start is requesting a result, we can avoid making 4463 // the activity visible until the result is received. Setting 4464 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4465 // activity hidden during this time, to avoid flickering. 4466 // This can only be done when a result is requested because 4467 // that guarantees we will get information back when the 4468 // activity is finished, no matter what happens to it. 4469 mStartedActivity = true; 4470 } 4471 } 4472 4473 /** 4474 * Same as {@link #startActivity(Intent, Bundle)} with no options 4475 * specified. 4476 * 4477 * @param intent The intent to start. 4478 * 4479 * @throws android.content.ActivityNotFoundException 4480 * 4481 * @see {@link #startActivity(Intent, Bundle)} 4482 * @see #startActivityForResult 4483 */ 4484 @Override 4485 public void startActivity(Intent intent) { 4486 this.startActivity(intent, null); 4487 } 4488 4489 /** 4490 * Launch a new activity. You will not receive any information about when 4491 * the activity exits. This implementation overrides the base version, 4492 * providing information about 4493 * the activity performing the launch. Because of this additional 4494 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4495 * required; if not specified, the new activity will be added to the 4496 * task of the caller. 4497 * 4498 * <p>This method throws {@link android.content.ActivityNotFoundException} 4499 * if there was no Activity found to run the given Intent. 4500 * 4501 * @param intent The intent to start. 4502 * @param options Additional options for how the Activity should be started. 4503 * See {@link android.content.Context#startActivity(Intent, Bundle) 4504 * Context.startActivity(Intent, Bundle)} for more details. 4505 * 4506 * @throws android.content.ActivityNotFoundException 4507 * 4508 * @see {@link #startActivity(Intent)} 4509 * @see #startActivityForResult 4510 */ 4511 @Override 4512 public void startActivity(Intent intent, @Nullable Bundle options) { 4513 if (options != null) { 4514 startActivityForResult(intent, -1, options); 4515 } else { 4516 // Note we want to go through this call for compatibility with 4517 // applications that may have overridden the method. 4518 startActivityForResult(intent, -1); 4519 } 4520 } 4521 4522 /** 4523 * Same as {@link #startActivities(Intent[], Bundle)} with no options 4524 * specified. 4525 * 4526 * @param intents The intents to start. 4527 * 4528 * @throws android.content.ActivityNotFoundException 4529 * 4530 * @see {@link #startActivities(Intent[], Bundle)} 4531 * @see #startActivityForResult 4532 */ 4533 @Override 4534 public void startActivities(Intent[] intents) { 4535 startActivities(intents, null); 4536 } 4537 4538 /** 4539 * Launch a new activity. You will not receive any information about when 4540 * the activity exits. This implementation overrides the base version, 4541 * providing information about 4542 * the activity performing the launch. Because of this additional 4543 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4544 * required; if not specified, the new activity will be added to the 4545 * task of the caller. 4546 * 4547 * <p>This method throws {@link android.content.ActivityNotFoundException} 4548 * if there was no Activity found to run the given Intent. 4549 * 4550 * @param intents The intents to start. 4551 * @param options Additional options for how the Activity should be started. 4552 * See {@link android.content.Context#startActivity(Intent, Bundle) 4553 * Context.startActivity(Intent, Bundle)} for more details. 4554 * 4555 * @throws android.content.ActivityNotFoundException 4556 * 4557 * @see {@link #startActivities(Intent[])} 4558 * @see #startActivityForResult 4559 */ 4560 @Override 4561 public void startActivities(Intent[] intents, @Nullable Bundle options) { 4562 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 4563 mToken, this, intents, options); 4564 } 4565 4566 /** 4567 * Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 4568 * with no options. 4569 * 4570 * @param intent The IntentSender to launch. 4571 * @param fillInIntent If non-null, this will be provided as the 4572 * intent parameter to {@link IntentSender#sendIntent}. 4573 * @param flagsMask Intent flags in the original IntentSender that you 4574 * would like to change. 4575 * @param flagsValues Desired values for any bits set in 4576 * <var>flagsMask</var> 4577 * @param extraFlags Always set to 0. 4578 */ 4579 public void startIntentSender(IntentSender intent, 4580 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4581 throws IntentSender.SendIntentException { 4582 startIntentSender(intent, fillInIntent, flagsMask, flagsValues, 4583 extraFlags, null); 4584 } 4585 4586 /** 4587 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 4588 * to start; see 4589 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)} 4590 * for more information. 4591 * 4592 * @param intent The IntentSender to launch. 4593 * @param fillInIntent If non-null, this will be provided as the 4594 * intent parameter to {@link IntentSender#sendIntent}. 4595 * @param flagsMask Intent flags in the original IntentSender that you 4596 * would like to change. 4597 * @param flagsValues Desired values for any bits set in 4598 * <var>flagsMask</var> 4599 * @param extraFlags Always set to 0. 4600 * @param options Additional options for how the Activity should be started. 4601 * See {@link android.content.Context#startActivity(Intent, Bundle) 4602 * Context.startActivity(Intent, Bundle)} for more details. If options 4603 * have also been supplied by the IntentSender, options given here will 4604 * override any that conflict with those given by the IntentSender. 4605 */ 4606 public void startIntentSender(IntentSender intent, 4607 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4608 Bundle options) throws IntentSender.SendIntentException { 4609 if (options != null) { 4610 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4611 flagsValues, extraFlags, options); 4612 } else { 4613 // Note we want to go through this call for compatibility with 4614 // applications that may have overridden the method. 4615 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4616 flagsValues, extraFlags); 4617 } 4618 } 4619 4620 /** 4621 * Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)} 4622 * with no options. 4623 * 4624 * @param intent The intent to start. 4625 * @param requestCode If >= 0, this code will be returned in 4626 * onActivityResult() when the activity exits, as described in 4627 * {@link #startActivityForResult}. 4628 * 4629 * @return If a new activity was launched then true is returned; otherwise 4630 * false is returned and you must handle the Intent yourself. 4631 * 4632 * @see #startActivity 4633 * @see #startActivityForResult 4634 */ 4635 public boolean startActivityIfNeeded(@RequiresPermission @NonNull Intent intent, 4636 int requestCode) { 4637 return startActivityIfNeeded(intent, requestCode, null); 4638 } 4639 4640 /** 4641 * A special variation to launch an activity only if a new activity 4642 * instance is needed to handle the given Intent. In other words, this is 4643 * just like {@link #startActivityForResult(Intent, int)} except: if you are 4644 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 4645 * singleTask or singleTop 4646 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 4647 * and the activity 4648 * that handles <var>intent</var> is the same as your currently running 4649 * activity, then a new instance is not needed. In this case, instead of 4650 * the normal behavior of calling {@link #onNewIntent} this function will 4651 * return and you can handle the Intent yourself. 4652 * 4653 * <p>This function can only be called from a top-level activity; if it is 4654 * called from a child activity, a runtime exception will be thrown. 4655 * 4656 * @param intent The intent to start. 4657 * @param requestCode If >= 0, this code will be returned in 4658 * onActivityResult() when the activity exits, as described in 4659 * {@link #startActivityForResult}. 4660 * @param options Additional options for how the Activity should be started. 4661 * See {@link android.content.Context#startActivity(Intent, Bundle) 4662 * Context.startActivity(Intent, Bundle)} for more details. 4663 * 4664 * @return If a new activity was launched then true is returned; otherwise 4665 * false is returned and you must handle the Intent yourself. 4666 * 4667 * @see #startActivity 4668 * @see #startActivityForResult 4669 */ 4670 public boolean startActivityIfNeeded(@RequiresPermission @NonNull Intent intent, 4671 int requestCode, @Nullable Bundle options) { 4672 if (mParent == null) { 4673 int result = ActivityManager.START_RETURN_INTENT_TO_CALLER; 4674 try { 4675 Uri referrer = onProvideReferrer(); 4676 if (referrer != null) { 4677 intent.putExtra(Intent.EXTRA_REFERRER, referrer); 4678 } 4679 intent.migrateExtraStreamToClipData(); 4680 intent.prepareToLeaveProcess(this); 4681 result = ActivityManagerNative.getDefault() 4682 .startActivity(mMainThread.getApplicationThread(), getBasePackageName(), 4683 intent, intent.resolveTypeIfNeeded(getContentResolver()), mToken, 4684 mEmbeddedID, requestCode, ActivityManager.START_FLAG_ONLY_IF_NEEDED, 4685 null, options); 4686 } catch (RemoteException e) { 4687 // Empty 4688 } 4689 4690 Instrumentation.checkStartActivityResult(result, intent); 4691 4692 if (requestCode >= 0) { 4693 // If this start is requesting a result, we can avoid making 4694 // the activity visible until the result is received. Setting 4695 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4696 // activity hidden during this time, to avoid flickering. 4697 // This can only be done when a result is requested because 4698 // that guarantees we will get information back when the 4699 // activity is finished, no matter what happens to it. 4700 mStartedActivity = true; 4701 } 4702 return result != ActivityManager.START_RETURN_INTENT_TO_CALLER; 4703 } 4704 4705 throw new UnsupportedOperationException( 4706 "startActivityIfNeeded can only be called from a top-level activity"); 4707 } 4708 4709 /** 4710 * Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with 4711 * no options. 4712 * 4713 * @param intent The intent to dispatch to the next activity. For 4714 * correct behavior, this must be the same as the Intent that started 4715 * your own activity; the only changes you can make are to the extras 4716 * inside of it. 4717 * 4718 * @return Returns a boolean indicating whether there was another Activity 4719 * to start: true if there was a next activity to start, false if there 4720 * wasn't. In general, if true is returned you will then want to call 4721 * finish() on yourself. 4722 */ 4723 public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent) { 4724 return startNextMatchingActivity(intent, null); 4725 } 4726 4727 /** 4728 * Special version of starting an activity, for use when you are replacing 4729 * other activity components. You can use this to hand the Intent off 4730 * to the next Activity that can handle it. You typically call this in 4731 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 4732 * 4733 * @param intent The intent to dispatch to the next activity. For 4734 * correct behavior, this must be the same as the Intent that started 4735 * your own activity; the only changes you can make are to the extras 4736 * inside of it. 4737 * @param options Additional options for how the Activity should be started. 4738 * See {@link android.content.Context#startActivity(Intent, Bundle) 4739 * Context.startActivity(Intent, Bundle)} for more details. 4740 * 4741 * @return Returns a boolean indicating whether there was another Activity 4742 * to start: true if there was a next activity to start, false if there 4743 * wasn't. In general, if true is returned you will then want to call 4744 * finish() on yourself. 4745 */ 4746 public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent, 4747 @Nullable Bundle options) { 4748 if (mParent == null) { 4749 try { 4750 intent.migrateExtraStreamToClipData(); 4751 intent.prepareToLeaveProcess(this); 4752 return ActivityManagerNative.getDefault() 4753 .startNextMatchingActivity(mToken, intent, options); 4754 } catch (RemoteException e) { 4755 // Empty 4756 } 4757 return false; 4758 } 4759 4760 throw new UnsupportedOperationException( 4761 "startNextMatchingActivity can only be called from a top-level activity"); 4762 } 4763 4764 /** 4765 * Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)} 4766 * with no options. 4767 * 4768 * @param child The activity making the call. 4769 * @param intent The intent to start. 4770 * @param requestCode Reply request code. < 0 if reply is not requested. 4771 * 4772 * @throws android.content.ActivityNotFoundException 4773 * 4774 * @see #startActivity 4775 * @see #startActivityForResult 4776 */ 4777 public void startActivityFromChild(@NonNull Activity child, @RequiresPermission Intent intent, 4778 int requestCode) { 4779 startActivityFromChild(child, intent, requestCode, null); 4780 } 4781 4782 /** 4783 * This is called when a child activity of this one calls its 4784 * {@link #startActivity} or {@link #startActivityForResult} method. 4785 * 4786 * <p>This method throws {@link android.content.ActivityNotFoundException} 4787 * if there was no Activity found to run the given Intent. 4788 * 4789 * @param child The activity making the call. 4790 * @param intent The intent to start. 4791 * @param requestCode Reply request code. < 0 if reply is not requested. 4792 * @param options Additional options for how the Activity should be started. 4793 * See {@link android.content.Context#startActivity(Intent, Bundle) 4794 * Context.startActivity(Intent, Bundle)} for more details. 4795 * 4796 * @throws android.content.ActivityNotFoundException 4797 * 4798 * @see #startActivity 4799 * @see #startActivityForResult 4800 */ 4801 public void startActivityFromChild(@NonNull Activity child, @RequiresPermission Intent intent, 4802 int requestCode, @Nullable Bundle options) { 4803 options = transferSpringboardActivityOptions(options); 4804 Instrumentation.ActivityResult ar = 4805 mInstrumentation.execStartActivity( 4806 this, mMainThread.getApplicationThread(), mToken, child, 4807 intent, requestCode, options); 4808 if (ar != null) { 4809 mMainThread.sendActivityResult( 4810 mToken, child.mEmbeddedID, requestCode, 4811 ar.getResultCode(), ar.getResultData()); 4812 } 4813 cancelInputsAndStartExitTransition(options); 4814 } 4815 4816 /** 4817 * Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)} 4818 * with no options. 4819 * 4820 * @param fragment The fragment making the call. 4821 * @param intent The intent to start. 4822 * @param requestCode Reply request code. < 0 if reply is not requested. 4823 * 4824 * @throws android.content.ActivityNotFoundException 4825 * 4826 * @see Fragment#startActivity 4827 * @see Fragment#startActivityForResult 4828 */ 4829 public void startActivityFromFragment(@NonNull Fragment fragment, 4830 @RequiresPermission Intent intent, int requestCode) { 4831 startActivityFromFragment(fragment, intent, requestCode, null); 4832 } 4833 4834 /** 4835 * This is called when a Fragment in this activity calls its 4836 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 4837 * method. 4838 * 4839 * <p>This method throws {@link android.content.ActivityNotFoundException} 4840 * if there was no Activity found to run the given Intent. 4841 * 4842 * @param fragment The fragment making the call. 4843 * @param intent The intent to start. 4844 * @param requestCode Reply request code. < 0 if reply is not requested. 4845 * @param options Additional options for how the Activity should be started. 4846 * See {@link android.content.Context#startActivity(Intent, Bundle) 4847 * Context.startActivity(Intent, Bundle)} for more details. 4848 * 4849 * @throws android.content.ActivityNotFoundException 4850 * 4851 * @see Fragment#startActivity 4852 * @see Fragment#startActivityForResult 4853 */ 4854 public void startActivityFromFragment(@NonNull Fragment fragment, 4855 @RequiresPermission Intent intent, int requestCode, @Nullable Bundle options) { 4856 startActivityForResult(fragment.mWho, intent, requestCode, options); 4857 } 4858 4859 /** 4860 * @hide 4861 */ 4862 @Override 4863 public void startActivityForResult( 4864 String who, Intent intent, int requestCode, @Nullable Bundle options) { 4865 Uri referrer = onProvideReferrer(); 4866 if (referrer != null) { 4867 intent.putExtra(Intent.EXTRA_REFERRER, referrer); 4868 } 4869 options = transferSpringboardActivityOptions(options); 4870 Instrumentation.ActivityResult ar = 4871 mInstrumentation.execStartActivity( 4872 this, mMainThread.getApplicationThread(), mToken, who, 4873 intent, requestCode, options); 4874 if (ar != null) { 4875 mMainThread.sendActivityResult( 4876 mToken, who, requestCode, 4877 ar.getResultCode(), ar.getResultData()); 4878 } 4879 cancelInputsAndStartExitTransition(options); 4880 } 4881 4882 /** 4883 * @hide 4884 */ 4885 @Override 4886 public boolean canStartActivityForResult() { 4887 return true; 4888 } 4889 4890 /** 4891 * Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender, 4892 * int, Intent, int, int, int, Bundle)} with no options. 4893 */ 4894 public void startIntentSenderFromChild(Activity child, IntentSender intent, 4895 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 4896 int extraFlags) 4897 throws IntentSender.SendIntentException { 4898 startIntentSenderFromChild(child, intent, requestCode, fillInIntent, 4899 flagsMask, flagsValues, extraFlags, null); 4900 } 4901 4902 /** 4903 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 4904 * taking a IntentSender; see 4905 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 4906 * for more information. 4907 */ 4908 public void startIntentSenderFromChild(Activity child, IntentSender intent, 4909 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 4910 int extraFlags, @Nullable Bundle options) 4911 throws IntentSender.SendIntentException { 4912 startIntentSenderForResultInner(intent, child.mEmbeddedID, requestCode, fillInIntent, 4913 flagsMask, flagsValues, options); 4914 } 4915 4916 /** 4917 * Like {@link #startIntentSenderFromChild}, but taking a Fragment; see 4918 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 4919 * for more information. 4920 * 4921 * @hide 4922 */ 4923 public void startIntentSenderFromChildFragment(Fragment child, IntentSender intent, 4924 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 4925 int extraFlags, @Nullable Bundle options) 4926 throws IntentSender.SendIntentException { 4927 startIntentSenderForResultInner(intent, child.mWho, requestCode, fillInIntent, 4928 flagsMask, flagsValues, options); 4929 } 4930 4931 /** 4932 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 4933 * or {@link #finish} to specify an explicit transition animation to 4934 * perform next. 4935 * 4936 * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative 4937 * to using this with starting activities is to supply the desired animation 4938 * information through a {@link ActivityOptions} bundle to 4939 * {@link #startActivity(Intent, Bundle) or a related function. This allows 4940 * you to specify a custom animation even when starting an activity from 4941 * outside the context of the current top activity. 4942 * 4943 * @param enterAnim A resource ID of the animation resource to use for 4944 * the incoming activity. Use 0 for no animation. 4945 * @param exitAnim A resource ID of the animation resource to use for 4946 * the outgoing activity. Use 0 for no animation. 4947 */ 4948 public void overridePendingTransition(int enterAnim, int exitAnim) { 4949 try { 4950 ActivityManagerNative.getDefault().overridePendingTransition( 4951 mToken, getPackageName(), enterAnim, exitAnim); 4952 } catch (RemoteException e) { 4953 } 4954 } 4955 4956 /** 4957 * Call this to set the result that your activity will return to its 4958 * caller. 4959 * 4960 * @param resultCode The result code to propagate back to the originating 4961 * activity, often RESULT_CANCELED or RESULT_OK 4962 * 4963 * @see #RESULT_CANCELED 4964 * @see #RESULT_OK 4965 * @see #RESULT_FIRST_USER 4966 * @see #setResult(int, Intent) 4967 */ 4968 public final void setResult(int resultCode) { 4969 synchronized (this) { 4970 mResultCode = resultCode; 4971 mResultData = null; 4972 } 4973 } 4974 4975 /** 4976 * Call this to set the result that your activity will return to its 4977 * caller. 4978 * 4979 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 4980 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 4981 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 4982 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 4983 * Activity receiving the result access to the specific URIs in the Intent. 4984 * Access will remain until the Activity has finished (it will remain across the hosting 4985 * process being killed and other temporary destruction) and will be added 4986 * to any existing set of URI permissions it already holds. 4987 * 4988 * @param resultCode The result code to propagate back to the originating 4989 * activity, often RESULT_CANCELED or RESULT_OK 4990 * @param data The data to propagate back to the originating activity. 4991 * 4992 * @see #RESULT_CANCELED 4993 * @see #RESULT_OK 4994 * @see #RESULT_FIRST_USER 4995 * @see #setResult(int) 4996 */ 4997 public final void setResult(int resultCode, Intent data) { 4998 synchronized (this) { 4999 mResultCode = resultCode; 5000 mResultData = data; 5001 } 5002 } 5003 5004 /** 5005 * Return information about who launched this activity. If the launching Intent 5006 * contains an {@link android.content.Intent#EXTRA_REFERRER Intent.EXTRA_REFERRER}, 5007 * that will be returned as-is; otherwise, if known, an 5008 * {@link Intent#URI_ANDROID_APP_SCHEME android-app:} referrer URI containing the 5009 * package name that started the Intent will be returned. This may return null if no 5010 * referrer can be identified -- it is neither explicitly specified, nor is it known which 5011 * application package was involved. 5012 * 5013 * <p>If called while inside the handling of {@link #onNewIntent}, this function will 5014 * return the referrer that submitted that new intent to the activity. Otherwise, it 5015 * always returns the referrer of the original Intent.</p> 5016 * 5017 * <p>Note that this is <em>not</em> a security feature -- you can not trust the 5018 * referrer information, applications can spoof it.</p> 5019 */ 5020 @Nullable 5021 public Uri getReferrer() { 5022 Intent intent = getIntent(); 5023 Uri referrer = intent.getParcelableExtra(Intent.EXTRA_REFERRER); 5024 if (referrer != null) { 5025 return referrer; 5026 } 5027 String referrerName = intent.getStringExtra(Intent.EXTRA_REFERRER_NAME); 5028 if (referrerName != null) { 5029 return Uri.parse(referrerName); 5030 } 5031 if (mReferrer != null) { 5032 return new Uri.Builder().scheme("android-app").authority(mReferrer).build(); 5033 } 5034 return null; 5035 } 5036 5037 /** 5038 * Override to generate the desired referrer for the content currently being shown 5039 * by the app. The default implementation returns null, meaning the referrer will simply 5040 * be the android-app: of the package name of this activity. Return a non-null Uri to 5041 * have that supplied as the {@link Intent#EXTRA_REFERRER} of any activities started from it. 5042 */ 5043 public Uri onProvideReferrer() { 5044 return null; 5045 } 5046 5047 /** 5048 * Return the name of the package that invoked this activity. This is who 5049 * the data in {@link #setResult setResult()} will be sent to. You can 5050 * use this information to validate that the recipient is allowed to 5051 * receive the data. 5052 * 5053 * <p class="note">Note: if the calling activity is not expecting a result (that is it 5054 * did not use the {@link #startActivityForResult} 5055 * form that includes a request code), then the calling package will be 5056 * null.</p> 5057 * 5058 * <p class="note">Note: prior to {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, 5059 * the result from this method was unstable. If the process hosting the calling 5060 * package was no longer running, it would return null instead of the proper package 5061 * name. You can use {@link #getCallingActivity()} and retrieve the package name 5062 * from that instead.</p> 5063 * 5064 * @return The package of the activity that will receive your 5065 * reply, or null if none. 5066 */ 5067 @Nullable 5068 public String getCallingPackage() { 5069 try { 5070 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 5071 } catch (RemoteException e) { 5072 return null; 5073 } 5074 } 5075 5076 /** 5077 * Return the name of the activity that invoked this activity. This is 5078 * who the data in {@link #setResult setResult()} will be sent to. You 5079 * can use this information to validate that the recipient is allowed to 5080 * receive the data. 5081 * 5082 * <p class="note">Note: if the calling activity is not expecting a result (that is it 5083 * did not use the {@link #startActivityForResult} 5084 * form that includes a request code), then the calling package will be 5085 * null. 5086 * 5087 * @return The ComponentName of the activity that will receive your 5088 * reply, or null if none. 5089 */ 5090 @Nullable 5091 public ComponentName getCallingActivity() { 5092 try { 5093 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 5094 } catch (RemoteException e) { 5095 return null; 5096 } 5097 } 5098 5099 /** 5100 * Control whether this activity's main window is visible. This is intended 5101 * only for the special case of an activity that is not going to show a 5102 * UI itself, but can't just finish prior to onResume() because it needs 5103 * to wait for a service binding or such. Setting this to false allows 5104 * you to prevent your UI from being shown during that time. 5105 * 5106 * <p>The default value for this is taken from the 5107 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 5108 */ 5109 public void setVisible(boolean visible) { 5110 if (mVisibleFromClient != visible) { 5111 mVisibleFromClient = visible; 5112 if (mVisibleFromServer) { 5113 if (visible) makeVisible(); 5114 else mDecor.setVisibility(View.INVISIBLE); 5115 } 5116 } 5117 } 5118 5119 void makeVisible() { 5120 if (!mWindowAdded) { 5121 ViewManager wm = getWindowManager(); 5122 wm.addView(mDecor, getWindow().getAttributes()); 5123 mWindowAdded = true; 5124 } 5125 mDecor.setVisibility(View.VISIBLE); 5126 } 5127 5128 /** 5129 * Check to see whether this activity is in the process of finishing, 5130 * either because you called {@link #finish} on it or someone else 5131 * has requested that it finished. This is often used in 5132 * {@link #onPause} to determine whether the activity is simply pausing or 5133 * completely finishing. 5134 * 5135 * @return If the activity is finishing, returns true; else returns false. 5136 * 5137 * @see #finish 5138 */ 5139 public boolean isFinishing() { 5140 return mFinished; 5141 } 5142 5143 /** 5144 * Returns true if the final {@link #onDestroy()} call has been made 5145 * on the Activity, so this instance is now dead. 5146 */ 5147 public boolean isDestroyed() { 5148 return mDestroyed; 5149 } 5150 5151 /** 5152 * Check to see whether this activity is in the process of being destroyed in order to be 5153 * recreated with a new configuration. This is often used in 5154 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 5155 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 5156 * 5157 * @return If the activity is being torn down in order to be recreated with a new configuration, 5158 * returns true; else returns false. 5159 */ 5160 public boolean isChangingConfigurations() { 5161 return mChangingConfigurations; 5162 } 5163 5164 /** 5165 * Cause this Activity to be recreated with a new instance. This results 5166 * in essentially the same flow as when the Activity is created due to 5167 * a configuration change -- the current instance will go through its 5168 * lifecycle to {@link #onDestroy} and a new instance then created after it. 5169 */ 5170 public void recreate() { 5171 if (mParent != null) { 5172 throw new IllegalStateException("Can only be called on top-level activity"); 5173 } 5174 if (Looper.myLooper() != mMainThread.getLooper()) { 5175 throw new IllegalStateException("Must be called from main thread"); 5176 } 5177 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, null, false, 5178 false /* preserveWindow */); 5179 } 5180 5181 /** 5182 * Finishes the current activity and specifies whether to remove the task associated with this 5183 * activity. 5184 */ 5185 private void finish(int finishTask) { 5186 if (mParent == null) { 5187 int resultCode; 5188 Intent resultData; 5189 synchronized (this) { 5190 resultCode = mResultCode; 5191 resultData = mResultData; 5192 } 5193 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 5194 try { 5195 if (resultData != null) { 5196 resultData.prepareToLeaveProcess(this); 5197 } 5198 if (ActivityManagerNative.getDefault() 5199 .finishActivity(mToken, resultCode, resultData, finishTask)) { 5200 mFinished = true; 5201 } 5202 } catch (RemoteException e) { 5203 // Empty 5204 } 5205 } else { 5206 mParent.finishFromChild(this); 5207 } 5208 } 5209 5210 /** 5211 * Call this when your activity is done and should be closed. The 5212 * ActivityResult is propagated back to whoever launched you via 5213 * onActivityResult(). 5214 */ 5215 public void finish() { 5216 finish(DONT_FINISH_TASK_WITH_ACTIVITY); 5217 } 5218 5219 /** 5220 * Finish this activity as well as all activities immediately below it 5221 * in the current task that have the same affinity. This is typically 5222 * used when an application can be launched on to another task (such as 5223 * from an ACTION_VIEW of a content type it understands) and the user 5224 * has used the up navigation to switch out of the current task and in 5225 * to its own task. In this case, if the user has navigated down into 5226 * any other activities of the second application, all of those should 5227 * be removed from the original task as part of the task switch. 5228 * 5229 * <p>Note that this finish does <em>not</em> allow you to deliver results 5230 * to the previous activity, and an exception will be thrown if you are trying 5231 * to do so.</p> 5232 */ 5233 public void finishAffinity() { 5234 if (mParent != null) { 5235 throw new IllegalStateException("Can not be called from an embedded activity"); 5236 } 5237 if (mResultCode != RESULT_CANCELED || mResultData != null) { 5238 throw new IllegalStateException("Can not be called to deliver a result"); 5239 } 5240 try { 5241 if (ActivityManagerNative.getDefault().finishActivityAffinity(mToken)) { 5242 mFinished = true; 5243 } 5244 } catch (RemoteException e) { 5245 // Empty 5246 } 5247 } 5248 5249 /** 5250 * This is called when a child activity of this one calls its 5251 * {@link #finish} method. The default implementation simply calls 5252 * finish() on this activity (the parent), finishing the entire group. 5253 * 5254 * @param child The activity making the call. 5255 * 5256 * @see #finish 5257 */ 5258 public void finishFromChild(Activity child) { 5259 finish(); 5260 } 5261 5262 /** 5263 * Reverses the Activity Scene entry Transition and triggers the calling Activity 5264 * to reverse its exit Transition. When the exit Transition completes, 5265 * {@link #finish()} is called. If no entry Transition was used, finish() is called 5266 * immediately and the Activity exit Transition is run. 5267 * @see android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, android.util.Pair[]) 5268 */ 5269 public void finishAfterTransition() { 5270 if (!mActivityTransitionState.startExitBackTransition(this)) { 5271 finish(); 5272 } 5273 } 5274 5275 /** 5276 * Force finish another activity that you had previously started with 5277 * {@link #startActivityForResult}. 5278 * 5279 * @param requestCode The request code of the activity that you had 5280 * given to startActivityForResult(). If there are multiple 5281 * activities started with this request code, they 5282 * will all be finished. 5283 */ 5284 public void finishActivity(int requestCode) { 5285 if (mParent == null) { 5286 try { 5287 ActivityManagerNative.getDefault() 5288 .finishSubActivity(mToken, mEmbeddedID, requestCode); 5289 } catch (RemoteException e) { 5290 // Empty 5291 } 5292 } else { 5293 mParent.finishActivityFromChild(this, requestCode); 5294 } 5295 } 5296 5297 /** 5298 * This is called when a child activity of this one calls its 5299 * finishActivity(). 5300 * 5301 * @param child The activity making the call. 5302 * @param requestCode Request code that had been used to start the 5303 * activity. 5304 */ 5305 public void finishActivityFromChild(@NonNull Activity child, int requestCode) { 5306 try { 5307 ActivityManagerNative.getDefault() 5308 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 5309 } catch (RemoteException e) { 5310 // Empty 5311 } 5312 } 5313 5314 /** 5315 * Call this when your activity is done and should be closed and the task should be completely 5316 * removed as a part of finishing the root activity of the task. 5317 */ 5318 public void finishAndRemoveTask() { 5319 finish(FINISH_TASK_WITH_ROOT_ACTIVITY); 5320 } 5321 5322 /** 5323 * Ask that the local app instance of this activity be released to free up its memory. 5324 * This is asking for the activity to be destroyed, but does <b>not</b> finish the activity -- 5325 * a new instance of the activity will later be re-created if needed due to the user 5326 * navigating back to it. 5327 * 5328 * @return Returns true if the activity was in a state that it has started the process 5329 * of destroying its current instance; returns false if for any reason this could not 5330 * be done: it is currently visible to the user, it is already being destroyed, it is 5331 * being finished, it hasn't yet saved its state, etc. 5332 */ 5333 public boolean releaseInstance() { 5334 try { 5335 return ActivityManagerNative.getDefault().releaseActivityInstance(mToken); 5336 } catch (RemoteException e) { 5337 // Empty 5338 } 5339 return false; 5340 } 5341 5342 /** 5343 * Called when an activity you launched exits, giving you the requestCode 5344 * you started it with, the resultCode it returned, and any additional 5345 * data from it. The <var>resultCode</var> will be 5346 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 5347 * didn't return any result, or crashed during its operation. 5348 * 5349 * <p>You will receive this call immediately before onResume() when your 5350 * activity is re-starting. 5351 * 5352 * <p>This method is never invoked if your activity sets 5353 * {@link android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 5354 * <code>true</code>. 5355 * 5356 * @param requestCode The integer request code originally supplied to 5357 * startActivityForResult(), allowing you to identify who this 5358 * result came from. 5359 * @param resultCode The integer result code returned by the child activity 5360 * through its setResult(). 5361 * @param data An Intent, which can return result data to the caller 5362 * (various data can be attached to Intent "extras"). 5363 * 5364 * @see #startActivityForResult 5365 * @see #createPendingResult 5366 * @see #setResult(int) 5367 */ 5368 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 5369 } 5370 5371 /** 5372 * Called when an activity you launched with an activity transition exposes this 5373 * Activity through a returning activity transition, giving you the resultCode 5374 * and any additional data from it. This method will only be called if the activity 5375 * set a result code other than {@link #RESULT_CANCELED} and it supports activity 5376 * transitions with {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 5377 * 5378 * <p>The purpose of this function is to let the called Activity send a hint about 5379 * its state so that this underlying Activity can prepare to be exposed. A call to 5380 * this method does not guarantee that the called Activity has or will be exiting soon. 5381 * It only indicates that it will expose this Activity's Window and it has 5382 * some data to pass to prepare it.</p> 5383 * 5384 * @param resultCode The integer result code returned by the child activity 5385 * through its setResult(). 5386 * @param data An Intent, which can return result data to the caller 5387 * (various data can be attached to Intent "extras"). 5388 */ 5389 public void onActivityReenter(int resultCode, Intent data) { 5390 } 5391 5392 /** 5393 * Create a new PendingIntent object which you can hand to others 5394 * for them to use to send result data back to your 5395 * {@link #onActivityResult} callback. The created object will be either 5396 * one-shot (becoming invalid after a result is sent back) or multiple 5397 * (allowing any number of results to be sent through it). 5398 * 5399 * @param requestCode Private request code for the sender that will be 5400 * associated with the result data when it is returned. The sender can not 5401 * modify this value, allowing you to identify incoming results. 5402 * @param data Default data to supply in the result, which may be modified 5403 * by the sender. 5404 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 5405 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 5406 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 5407 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 5408 * or any of the flags as supported by 5409 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 5410 * of the intent that can be supplied when the actual send happens. 5411 * 5412 * @return Returns an existing or new PendingIntent matching the given 5413 * parameters. May return null only if 5414 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 5415 * supplied. 5416 * 5417 * @see PendingIntent 5418 */ 5419 public PendingIntent createPendingResult(int requestCode, @NonNull Intent data, 5420 @PendingIntent.Flags int flags) { 5421 String packageName = getPackageName(); 5422 try { 5423 data.prepareToLeaveProcess(this); 5424 IIntentSender target = 5425 ActivityManagerNative.getDefault().getIntentSender( 5426 ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 5427 mParent == null ? mToken : mParent.mToken, 5428 mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null, 5429 UserHandle.myUserId()); 5430 return target != null ? new PendingIntent(target) : null; 5431 } catch (RemoteException e) { 5432 // Empty 5433 } 5434 return null; 5435 } 5436 5437 /** 5438 * Change the desired orientation of this activity. If the activity 5439 * is currently in the foreground or otherwise impacting the screen 5440 * orientation, the screen will immediately be changed (possibly causing 5441 * the activity to be restarted). Otherwise, this will be used the next 5442 * time the activity is visible. 5443 * 5444 * @param requestedOrientation An orientation constant as used in 5445 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 5446 */ 5447 public void setRequestedOrientation(@ActivityInfo.ScreenOrientation int requestedOrientation) { 5448 if (mParent == null) { 5449 try { 5450 ActivityManagerNative.getDefault().setRequestedOrientation( 5451 mToken, requestedOrientation); 5452 } catch (RemoteException e) { 5453 // Empty 5454 } 5455 } else { 5456 mParent.setRequestedOrientation(requestedOrientation); 5457 } 5458 } 5459 5460 /** 5461 * Return the current requested orientation of the activity. This will 5462 * either be the orientation requested in its component's manifest, or 5463 * the last requested orientation given to 5464 * {@link #setRequestedOrientation(int)}. 5465 * 5466 * @return Returns an orientation constant as used in 5467 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 5468 */ 5469 @ActivityInfo.ScreenOrientation 5470 public int getRequestedOrientation() { 5471 if (mParent == null) { 5472 try { 5473 return ActivityManagerNative.getDefault() 5474 .getRequestedOrientation(mToken); 5475 } catch (RemoteException e) { 5476 // Empty 5477 } 5478 } else { 5479 return mParent.getRequestedOrientation(); 5480 } 5481 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 5482 } 5483 5484 /** 5485 * Return the identifier of the task this activity is in. This identifier 5486 * will remain the same for the lifetime of the activity. 5487 * 5488 * @return Task identifier, an opaque integer. 5489 */ 5490 public int getTaskId() { 5491 try { 5492 return ActivityManagerNative.getDefault() 5493 .getTaskForActivity(mToken, false); 5494 } catch (RemoteException e) { 5495 return -1; 5496 } 5497 } 5498 5499 /** 5500 * Return whether this activity is the root of a task. The root is the 5501 * first activity in a task. 5502 * 5503 * @return True if this is the root activity, else false. 5504 */ 5505 public boolean isTaskRoot() { 5506 try { 5507 return ActivityManagerNative.getDefault().getTaskForActivity(mToken, true) >= 0; 5508 } catch (RemoteException e) { 5509 return false; 5510 } 5511 } 5512 5513 /** 5514 * Move the task containing this activity to the back of the activity 5515 * stack. The activity's order within the task is unchanged. 5516 * 5517 * @param nonRoot If false then this only works if the activity is the root 5518 * of a task; if true it will work for any activity in 5519 * a task. 5520 * 5521 * @return If the task was moved (or it was already at the 5522 * back) true is returned, else false. 5523 */ 5524 public boolean moveTaskToBack(boolean nonRoot) { 5525 try { 5526 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 5527 mToken, nonRoot); 5528 } catch (RemoteException e) { 5529 // Empty 5530 } 5531 return false; 5532 } 5533 5534 /** 5535 * Returns class name for this activity with the package prefix removed. 5536 * This is the default name used to read and write settings. 5537 * 5538 * @return The local class name. 5539 */ 5540 @NonNull 5541 public String getLocalClassName() { 5542 final String pkg = getPackageName(); 5543 final String cls = mComponent.getClassName(); 5544 int packageLen = pkg.length(); 5545 if (!cls.startsWith(pkg) || cls.length() <= packageLen 5546 || cls.charAt(packageLen) != '.') { 5547 return cls; 5548 } 5549 return cls.substring(packageLen+1); 5550 } 5551 5552 /** 5553 * Returns complete component name of this activity. 5554 * 5555 * @return Returns the complete component name for this activity 5556 */ 5557 public ComponentName getComponentName() 5558 { 5559 return mComponent; 5560 } 5561 5562 /** 5563 * Retrieve a {@link SharedPreferences} object for accessing preferences 5564 * that are private to this activity. This simply calls the underlying 5565 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 5566 * class name as the preferences name. 5567 * 5568 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 5569 * operation. 5570 * 5571 * @return Returns the single SharedPreferences instance that can be used 5572 * to retrieve and modify the preference values. 5573 */ 5574 public SharedPreferences getPreferences(int mode) { 5575 return getSharedPreferences(getLocalClassName(), mode); 5576 } 5577 5578 private void ensureSearchManager() { 5579 if (mSearchManager != null) { 5580 return; 5581 } 5582 5583 mSearchManager = new SearchManager(this, null); 5584 } 5585 5586 @Override 5587 public Object getSystemService(@ServiceName @NonNull String name) { 5588 if (getBaseContext() == null) { 5589 throw new IllegalStateException( 5590 "System services not available to Activities before onCreate()"); 5591 } 5592 5593 if (WINDOW_SERVICE.equals(name)) { 5594 return mWindowManager; 5595 } else if (SEARCH_SERVICE.equals(name)) { 5596 ensureSearchManager(); 5597 return mSearchManager; 5598 } 5599 return super.getSystemService(name); 5600 } 5601 5602 /** 5603 * Change the title associated with this activity. If this is a 5604 * top-level activity, the title for its window will change. If it 5605 * is an embedded activity, the parent can do whatever it wants 5606 * with it. 5607 */ 5608 public void setTitle(CharSequence title) { 5609 mTitle = title; 5610 onTitleChanged(title, mTitleColor); 5611 5612 if (mParent != null) { 5613 mParent.onChildTitleChanged(this, title); 5614 } 5615 } 5616 5617 /** 5618 * Change the title associated with this activity. If this is a 5619 * top-level activity, the title for its window will change. If it 5620 * is an embedded activity, the parent can do whatever it wants 5621 * with it. 5622 */ 5623 public void setTitle(int titleId) { 5624 setTitle(getText(titleId)); 5625 } 5626 5627 /** 5628 * Change the color of the title associated with this activity. 5629 * <p> 5630 * This method is deprecated starting in API Level 11 and replaced by action 5631 * bar styles. For information on styling the Action Bar, read the <a 5632 * href="{@docRoot} guide/topics/ui/actionbar.html">Action Bar</a> developer 5633 * guide. 5634 * 5635 * @deprecated Use action bar styles instead. 5636 */ 5637 @Deprecated 5638 public void setTitleColor(int textColor) { 5639 mTitleColor = textColor; 5640 onTitleChanged(mTitle, textColor); 5641 } 5642 5643 public final CharSequence getTitle() { 5644 return mTitle; 5645 } 5646 5647 public final int getTitleColor() { 5648 return mTitleColor; 5649 } 5650 5651 protected void onTitleChanged(CharSequence title, int color) { 5652 if (mTitleReady) { 5653 final Window win = getWindow(); 5654 if (win != null) { 5655 win.setTitle(title); 5656 if (color != 0) { 5657 win.setTitleColor(color); 5658 } 5659 } 5660 if (mActionBar != null) { 5661 mActionBar.setWindowTitle(title); 5662 } 5663 } 5664 } 5665 5666 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 5667 } 5668 5669 /** 5670 * Sets information describing the task with this activity for presentation inside the Recents 5671 * System UI. When {@link ActivityManager#getRecentTasks} is called, the activities of each task 5672 * are traversed in order from the topmost activity to the bottommost. The traversal continues 5673 * for each property until a suitable value is found. For each task the taskDescription will be 5674 * returned in {@link android.app.ActivityManager.TaskDescription}. 5675 * 5676 * @see ActivityManager#getRecentTasks 5677 * @see android.app.ActivityManager.TaskDescription 5678 * 5679 * @param taskDescription The TaskDescription properties that describe the task with this activity 5680 */ 5681 public void setTaskDescription(ActivityManager.TaskDescription taskDescription) { 5682 if (mTaskDescription != taskDescription) { 5683 mTaskDescription.copyFrom(taskDescription); 5684 // Scale the icon down to something reasonable if it is provided 5685 if (taskDescription.getIconFilename() == null && taskDescription.getIcon() != null) { 5686 final int size = ActivityManager.getLauncherLargeIconSizeInner(this); 5687 final Bitmap icon = Bitmap.createScaledBitmap(taskDescription.getIcon(), size, size, 5688 true); 5689 mTaskDescription.setIcon(icon); 5690 } 5691 } 5692 try { 5693 ActivityManagerNative.getDefault().setTaskDescription(mToken, mTaskDescription); 5694 } catch (RemoteException e) { 5695 } 5696 } 5697 5698 /** 5699 * Sets the visibility of the progress bar in the title. 5700 * <p> 5701 * In order for the progress bar to be shown, the feature must be requested 5702 * via {@link #requestWindowFeature(int)}. 5703 * 5704 * @param visible Whether to show the progress bars in the title. 5705 * @deprecated No longer supported starting in API 21. 5706 */ 5707 @Deprecated 5708 public final void setProgressBarVisibility(boolean visible) { 5709 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 5710 Window.PROGRESS_VISIBILITY_OFF); 5711 } 5712 5713 /** 5714 * Sets the visibility of the indeterminate progress bar in the title. 5715 * <p> 5716 * In order for the progress bar to be shown, the feature must be requested 5717 * via {@link #requestWindowFeature(int)}. 5718 * 5719 * @param visible Whether to show the progress bars in the title. 5720 * @deprecated No longer supported starting in API 21. 5721 */ 5722 @Deprecated 5723 public final void setProgressBarIndeterminateVisibility(boolean visible) { 5724 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 5725 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 5726 } 5727 5728 /** 5729 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 5730 * is always indeterminate). 5731 * <p> 5732 * In order for the progress bar to be shown, the feature must be requested 5733 * via {@link #requestWindowFeature(int)}. 5734 * 5735 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 5736 * @deprecated No longer supported starting in API 21. 5737 */ 5738 @Deprecated 5739 public final void setProgressBarIndeterminate(boolean indeterminate) { 5740 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 5741 indeterminate ? Window.PROGRESS_INDETERMINATE_ON 5742 : Window.PROGRESS_INDETERMINATE_OFF); 5743 } 5744 5745 /** 5746 * Sets the progress for the progress bars in the title. 5747 * <p> 5748 * In order for the progress bar to be shown, the feature must be requested 5749 * via {@link #requestWindowFeature(int)}. 5750 * 5751 * @param progress The progress for the progress bar. Valid ranges are from 5752 * 0 to 10000 (both inclusive). If 10000 is given, the progress 5753 * bar will be completely filled and will fade out. 5754 * @deprecated No longer supported starting in API 21. 5755 */ 5756 @Deprecated 5757 public final void setProgress(int progress) { 5758 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 5759 } 5760 5761 /** 5762 * Sets the secondary progress for the progress bar in the title. This 5763 * progress is drawn between the primary progress (set via 5764 * {@link #setProgress(int)} and the background. It can be ideal for media 5765 * scenarios such as showing the buffering progress while the default 5766 * progress shows the play progress. 5767 * <p> 5768 * In order for the progress bar to be shown, the feature must be requested 5769 * via {@link #requestWindowFeature(int)}. 5770 * 5771 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 5772 * 0 to 10000 (both inclusive). 5773 * @deprecated No longer supported starting in API 21. 5774 */ 5775 @Deprecated 5776 public final void setSecondaryProgress(int secondaryProgress) { 5777 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 5778 secondaryProgress + Window.PROGRESS_SECONDARY_START); 5779 } 5780 5781 /** 5782 * Suggests an audio stream whose volume should be changed by the hardware 5783 * volume controls. 5784 * <p> 5785 * The suggested audio stream will be tied to the window of this Activity. 5786 * Volume requests which are received while the Activity is in the 5787 * foreground will affect this stream. 5788 * <p> 5789 * It is not guaranteed that the hardware volume controls will always change 5790 * this stream's volume (for example, if a call is in progress, its stream's 5791 * volume may be changed instead). To reset back to the default, use 5792 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 5793 * 5794 * @param streamType The type of the audio stream whose volume should be 5795 * changed by the hardware volume controls. 5796 */ 5797 public final void setVolumeControlStream(int streamType) { 5798 getWindow().setVolumeControlStream(streamType); 5799 } 5800 5801 /** 5802 * Gets the suggested audio stream whose volume should be changed by the 5803 * hardware volume controls. 5804 * 5805 * @return The suggested audio stream type whose volume should be changed by 5806 * the hardware volume controls. 5807 * @see #setVolumeControlStream(int) 5808 */ 5809 public final int getVolumeControlStream() { 5810 return getWindow().getVolumeControlStream(); 5811 } 5812 5813 /** 5814 * Sets a {@link MediaController} to send media keys and volume changes to. 5815 * <p> 5816 * The controller will be tied to the window of this Activity. Media key and 5817 * volume events which are received while the Activity is in the foreground 5818 * will be forwarded to the controller and used to invoke transport controls 5819 * or adjust the volume. This may be used instead of or in addition to 5820 * {@link #setVolumeControlStream} to affect a specific session instead of a 5821 * specific stream. 5822 * <p> 5823 * It is not guaranteed that the hardware volume controls will always change 5824 * this session's volume (for example, if a call is in progress, its 5825 * stream's volume may be changed instead). To reset back to the default use 5826 * null as the controller. 5827 * 5828 * @param controller The controller for the session which should receive 5829 * media keys and volume changes. 5830 */ 5831 public final void setMediaController(MediaController controller) { 5832 getWindow().setMediaController(controller); 5833 } 5834 5835 /** 5836 * Gets the controller which should be receiving media key and volume events 5837 * while this activity is in the foreground. 5838 * 5839 * @return The controller which should receive events. 5840 * @see #setMediaController(android.media.session.MediaController) 5841 */ 5842 public final MediaController getMediaController() { 5843 return getWindow().getMediaController(); 5844 } 5845 5846 /** 5847 * Runs the specified action on the UI thread. If the current thread is the UI 5848 * thread, then the action is executed immediately. If the current thread is 5849 * not the UI thread, the action is posted to the event queue of the UI thread. 5850 * 5851 * @param action the action to run on the UI thread 5852 */ 5853 public final void runOnUiThread(Runnable action) { 5854 if (Thread.currentThread() != mUiThread) { 5855 mHandler.post(action); 5856 } else { 5857 action.run(); 5858 } 5859 } 5860 5861 /** 5862 * Standard implementation of 5863 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 5864 * inflating with the LayoutInflater returned by {@link #getSystemService}. 5865 * This implementation does nothing and is for 5866 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 5867 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 5868 * 5869 * @see android.view.LayoutInflater#createView 5870 * @see android.view.Window#getLayoutInflater 5871 */ 5872 @Nullable 5873 public View onCreateView(String name, Context context, AttributeSet attrs) { 5874 return null; 5875 } 5876 5877 /** 5878 * Standard implementation of 5879 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 5880 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 5881 * This implementation handles <fragment> tags to embed fragments inside 5882 * of the activity. 5883 * 5884 * @see android.view.LayoutInflater#createView 5885 * @see android.view.Window#getLayoutInflater 5886 */ 5887 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 5888 if (!"fragment".equals(name)) { 5889 return onCreateView(name, context, attrs); 5890 } 5891 5892 return mFragments.onCreateView(parent, name, context, attrs); 5893 } 5894 5895 /** 5896 * Print the Activity's state into the given stream. This gets invoked if 5897 * you run "adb shell dumpsys activity <activity_component_name>". 5898 * 5899 * @param prefix Desired prefix to prepend at each line of output. 5900 * @param fd The raw file descriptor that the dump is being sent to. 5901 * @param writer The PrintWriter to which you should dump your state. This will be 5902 * closed for you after you return. 5903 * @param args additional arguments to the dump request. 5904 */ 5905 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 5906 dumpInner(prefix, fd, writer, args); 5907 } 5908 5909 void dumpInner(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 5910 writer.print(prefix); writer.print("Local Activity "); 5911 writer.print(Integer.toHexString(System.identityHashCode(this))); 5912 writer.println(" State:"); 5913 String innerPrefix = prefix + " "; 5914 writer.print(innerPrefix); writer.print("mResumed="); 5915 writer.print(mResumed); writer.print(" mStopped="); 5916 writer.print(mStopped); writer.print(" mFinished="); 5917 writer.println(mFinished); 5918 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 5919 writer.println(mChangingConfigurations); 5920 writer.print(innerPrefix); writer.print("mCurrentConfig="); 5921 writer.println(mCurrentConfig); 5922 5923 mFragments.dumpLoaders(innerPrefix, fd, writer, args); 5924 mFragments.getFragmentManager().dump(innerPrefix, fd, writer, args); 5925 if (mVoiceInteractor != null) { 5926 mVoiceInteractor.dump(innerPrefix, fd, writer, args); 5927 } 5928 5929 if (getWindow() != null && 5930 getWindow().peekDecorView() != null && 5931 getWindow().peekDecorView().getViewRootImpl() != null) { 5932 getWindow().peekDecorView().getViewRootImpl().dump(prefix, fd, writer, args); 5933 } 5934 5935 mHandler.getLooper().dump(new PrintWriterPrinter(writer), prefix); 5936 } 5937 5938 /** 5939 * Bit indicating that this activity is "immersive" and should not be 5940 * interrupted by notifications if possible. 5941 * 5942 * This value is initially set by the manifest property 5943 * <code>android:immersive</code> but may be changed at runtime by 5944 * {@link #setImmersive}. 5945 * 5946 * @see #setImmersive(boolean) 5947 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 5948 */ 5949 public boolean isImmersive() { 5950 try { 5951 return ActivityManagerNative.getDefault().isImmersive(mToken); 5952 } catch (RemoteException e) { 5953 return false; 5954 } 5955 } 5956 5957 /** 5958 * Indication of whether this is the highest level activity in this task. Can be used to 5959 * determine whether an activity launched by this activity was placed in the same task or 5960 * another task. 5961 * 5962 * @return true if this is the topmost, non-finishing activity in its task. 5963 */ 5964 private boolean isTopOfTask() { 5965 if (mToken == null || mWindow == null) { 5966 return false; 5967 } 5968 try { 5969 return ActivityManagerNative.getDefault().isTopOfTask(mToken); 5970 } catch (RemoteException e) { 5971 return false; 5972 } 5973 } 5974 5975 /** 5976 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} to a 5977 * fullscreen opaque Activity. 5978 * <p> 5979 * Call this whenever the background of a translucent Activity has changed to become opaque. 5980 * Doing so will allow the {@link android.view.Surface} of the Activity behind to be released. 5981 * <p> 5982 * This call has no effect on non-translucent activities or on activities with the 5983 * {@link android.R.attr#windowIsFloating} attribute. 5984 * 5985 * @see #convertToTranslucent(android.app.Activity.TranslucentConversionListener, 5986 * ActivityOptions) 5987 * @see TranslucentConversionListener 5988 * 5989 * @hide 5990 */ 5991 @SystemApi 5992 public void convertFromTranslucent() { 5993 try { 5994 mTranslucentCallback = null; 5995 if (ActivityManagerNative.getDefault().convertFromTranslucent(mToken)) { 5996 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, true); 5997 } 5998 } catch (RemoteException e) { 5999 // pass 6000 } 6001 } 6002 6003 /** 6004 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} back from 6005 * opaque to translucent following a call to {@link #convertFromTranslucent()}. 6006 * <p> 6007 * Calling this allows the Activity behind this one to be seen again. Once all such Activities 6008 * have been redrawn {@link TranslucentConversionListener#onTranslucentConversionComplete} will 6009 * be called indicating that it is safe to make this activity translucent again. Until 6010 * {@link TranslucentConversionListener#onTranslucentConversionComplete} is called the image 6011 * behind the frontmost Activity will be indeterminate. 6012 * <p> 6013 * This call has no effect on non-translucent activities or on activities with the 6014 * {@link android.R.attr#windowIsFloating} attribute. 6015 * 6016 * @param callback the method to call when all visible Activities behind this one have been 6017 * drawn and it is safe to make this Activity translucent again. 6018 * @param options activity options delivered to the activity below this one. The options 6019 * are retrieved using {@link #getActivityOptions}. 6020 * @return <code>true</code> if Window was opaque and will become translucent or 6021 * <code>false</code> if window was translucent and no change needed to be made. 6022 * 6023 * @see #convertFromTranslucent() 6024 * @see TranslucentConversionListener 6025 * 6026 * @hide 6027 */ 6028 @SystemApi 6029 public boolean convertToTranslucent(TranslucentConversionListener callback, 6030 ActivityOptions options) { 6031 boolean drawComplete; 6032 try { 6033 mTranslucentCallback = callback; 6034 mChangeCanvasToTranslucent = 6035 ActivityManagerNative.getDefault().convertToTranslucent(mToken, options); 6036 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 6037 drawComplete = true; 6038 } catch (RemoteException e) { 6039 // Make callback return as though it timed out. 6040 mChangeCanvasToTranslucent = false; 6041 drawComplete = false; 6042 } 6043 if (!mChangeCanvasToTranslucent && mTranslucentCallback != null) { 6044 // Window is already translucent. 6045 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 6046 } 6047 return mChangeCanvasToTranslucent; 6048 } 6049 6050 /** @hide */ 6051 void onTranslucentConversionComplete(boolean drawComplete) { 6052 if (mTranslucentCallback != null) { 6053 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 6054 mTranslucentCallback = null; 6055 } 6056 if (mChangeCanvasToTranslucent) { 6057 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 6058 } 6059 } 6060 6061 /** @hide */ 6062 public void onNewActivityOptions(ActivityOptions options) { 6063 mActivityTransitionState.setEnterActivityOptions(this, options); 6064 if (!mStopped) { 6065 mActivityTransitionState.enterReady(this); 6066 } 6067 } 6068 6069 /** 6070 * Retrieve the ActivityOptions passed in from the launching activity or passed back 6071 * from an activity launched by this activity in its call to {@link 6072 * #convertToTranslucent(TranslucentConversionListener, ActivityOptions)} 6073 * 6074 * @return The ActivityOptions passed to {@link #convertToTranslucent}. 6075 * @hide 6076 */ 6077 ActivityOptions getActivityOptions() { 6078 try { 6079 return ActivityManagerNative.getDefault().getActivityOptions(mToken); 6080 } catch (RemoteException e) { 6081 } 6082 return null; 6083 } 6084 6085 /** 6086 * Activities that want to remain visible behind a translucent activity above them must call 6087 * this method anytime between the start of {@link #onResume()} and the return from 6088 * {@link #onPause()}. If this call is successful then the activity will remain visible after 6089 * {@link #onPause()} is called, and is allowed to continue playing media in the background. 6090 * 6091 * <p>The actions of this call are reset each time that this activity is brought to the 6092 * front. That is, every time {@link #onResume()} is called the activity will be assumed 6093 * to not have requested visible behind. Therefore, if you want this activity to continue to 6094 * be visible in the background you must call this method again. 6095 * 6096 * <p>Only fullscreen opaque activities may make this call. I.e. this call is a nop 6097 * for dialog and translucent activities. 6098 * 6099 * <p>Under all circumstances, the activity must stop playing and release resources prior to or 6100 * within a call to {@link #onVisibleBehindCanceled()} or if this call returns false. 6101 * 6102 * <p>False will be returned any time this method is called between the return of onPause and 6103 * the next call to onResume. 6104 * 6105 * @param visible true to notify the system that the activity wishes to be visible behind other 6106 * translucent activities, false to indicate otherwise. Resources must be 6107 * released when passing false to this method. 6108 * @return the resulting visibiity state. If true the activity will remain visible beyond 6109 * {@link #onPause()} if the next activity is translucent or not fullscreen. If false 6110 * then the activity may not count on being visible behind other translucent activities, 6111 * and must stop any media playback and release resources. 6112 * Returning false may occur in lieu of a call to {@link #onVisibleBehindCanceled()} so 6113 * the return value must be checked. 6114 * 6115 * @see #onVisibleBehindCanceled() 6116 * @see #onBackgroundVisibleBehindChanged(boolean) 6117 */ 6118 public boolean requestVisibleBehind(boolean visible) { 6119 if (!mResumed) { 6120 // Do not permit paused or stopped activities to do this. 6121 visible = false; 6122 } 6123 try { 6124 mVisibleBehind = ActivityManagerNative.getDefault() 6125 .requestVisibleBehind(mToken, visible) && visible; 6126 } catch (RemoteException e) { 6127 mVisibleBehind = false; 6128 } 6129 return mVisibleBehind; 6130 } 6131 6132 /** 6133 * Called when a translucent activity over this activity is becoming opaque or another 6134 * activity is being launched. Activities that override this method must call 6135 * <code>super.onVisibleBehindCanceled()</code> or a SuperNotCalledException will be thrown. 6136 * 6137 * <p>When this method is called the activity has 500 msec to release any resources it may be 6138 * using while visible in the background. 6139 * If the activity has not returned from this method in 500 msec the system will destroy 6140 * the activity and kill the process in order to recover the resources for another 6141 * process. Otherwise {@link #onStop()} will be called following return. 6142 * 6143 * @see #requestVisibleBehind(boolean) 6144 * @see #onBackgroundVisibleBehindChanged(boolean) 6145 */ 6146 @CallSuper 6147 public void onVisibleBehindCanceled() { 6148 mCalled = true; 6149 } 6150 6151 /** 6152 * Translucent activities may call this to determine if there is an activity below them that 6153 * is currently set to be visible in the background. 6154 * 6155 * @return true if an activity below is set to visible according to the most recent call to 6156 * {@link #requestVisibleBehind(boolean)}, false otherwise. 6157 * 6158 * @see #requestVisibleBehind(boolean) 6159 * @see #onVisibleBehindCanceled() 6160 * @see #onBackgroundVisibleBehindChanged(boolean) 6161 * @hide 6162 */ 6163 @SystemApi 6164 public boolean isBackgroundVisibleBehind() { 6165 try { 6166 return ActivityManagerNative.getDefault().isBackgroundVisibleBehind(mToken); 6167 } catch (RemoteException e) { 6168 } 6169 return false; 6170 } 6171 6172 /** 6173 * The topmost foreground activity will receive this call when the background visibility state 6174 * of the activity below it changes. 6175 * 6176 * This call may be a consequence of {@link #requestVisibleBehind(boolean)} or might be 6177 * due to a background activity finishing itself. 6178 * 6179 * @param visible true if a background activity is visible, false otherwise. 6180 * 6181 * @see #requestVisibleBehind(boolean) 6182 * @see #onVisibleBehindCanceled() 6183 * @hide 6184 */ 6185 @SystemApi 6186 public void onBackgroundVisibleBehindChanged(boolean visible) { 6187 } 6188 6189 /** 6190 * Activities cannot draw during the period that their windows are animating in. In order 6191 * to know when it is safe to begin drawing they can override this method which will be 6192 * called when the entering animation has completed. 6193 */ 6194 public void onEnterAnimationComplete() { 6195 } 6196 6197 /** 6198 * @hide 6199 */ 6200 public void dispatchEnterAnimationComplete() { 6201 onEnterAnimationComplete(); 6202 if (getWindow() != null && getWindow().getDecorView() != null) { 6203 getWindow().getDecorView().getViewTreeObserver().dispatchOnEnterAnimationComplete(); 6204 } 6205 } 6206 6207 /** 6208 * Adjust the current immersive mode setting. 6209 * 6210 * Note that changing this value will have no effect on the activity's 6211 * {@link android.content.pm.ActivityInfo} structure; that is, if 6212 * <code>android:immersive</code> is set to <code>true</code> 6213 * in the application's manifest entry for this activity, the {@link 6214 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 6215 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6216 * FLAG_IMMERSIVE} bit set. 6217 * 6218 * @see #isImmersive() 6219 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6220 */ 6221 public void setImmersive(boolean i) { 6222 try { 6223 ActivityManagerNative.getDefault().setImmersive(mToken, i); 6224 } catch (RemoteException e) { 6225 // pass 6226 } 6227 } 6228 6229 /** 6230 * Enable or disable virtual reality (VR) mode for this Activity. 6231 * 6232 * <p>VR mode is a hint to Android system to switch to a mode optimized for VR applications 6233 * while this Activity has user focus.</p> 6234 * 6235 * <p>It is recommended that applications additionally declare 6236 * {@link android.R.attr#enableVrMode} in their manifest to allow for smooth activity 6237 * transitions when switching between VR activities.</p> 6238 * 6239 * <p>If the requested {@link android.service.vr.VrListenerService} component is not available, 6240 * VR mode will not be started. Developers can handle this case as follows:</p> 6241 * 6242 * <pre> 6243 * String servicePackage = "com.whatever.app"; 6244 * String serviceClass = "com.whatever.app.MyVrListenerService"; 6245 * 6246 * // Name of the component of the VrListenerService to start. 6247 * ComponentName serviceComponent = new ComponentName(servicePackage, serviceClass); 6248 * 6249 * try { 6250 * setVrModeEnabled(true, myComponentName); 6251 * } catch (PackageManager.NameNotFoundException e) { 6252 * List<ApplicationInfo> installed = getPackageManager().getInstalledApplications(0); 6253 * boolean isInstalled = false; 6254 * for (ApplicationInfo app : installed) { 6255 * if (app.packageName.equals(servicePackage)) { 6256 * isInstalled = true; 6257 * break; 6258 * } 6259 * } 6260 * if (isInstalled) { 6261 * // Package is installed, but not enabled in Settings. Let user enable it. 6262 * startActivity(new Intent(Settings.ACTION_VR_LISTENER_SETTINGS)); 6263 * } else { 6264 * // Package is not installed. Send an intent to download this. 6265 * sentIntentToLaunchAppStore(servicePackage); 6266 * } 6267 * } 6268 * </pre> 6269 * 6270 * @param enabled {@code true} to enable this mode. 6271 * @param requestedComponent the name of the component to use as a 6272 * {@link android.service.vr.VrListenerService} while VR mode is enabled. 6273 * 6274 * @throws android.content.pm.PackageManager.NameNotFoundException if the given component 6275 * to run as a {@link android.service.vr.VrListenerService} is not installed, or has 6276 * not been enabled in user settings. 6277 * 6278 * @see android.content.pm.PackageManager#FEATURE_VR_MODE 6279 * @see android.content.pm.PackageManager#FEATURE_VR_MODE_HIGH_PERFORMANCE 6280 * @see android.service.vr.VrListenerService 6281 * @see android.provider.Settings#ACTION_VR_LISTENER_SETTINGS 6282 * @see android.R.attr#enableVrMode 6283 */ 6284 public void setVrModeEnabled(boolean enabled, @NonNull ComponentName requestedComponent) 6285 throws PackageManager.NameNotFoundException { 6286 try { 6287 if (ActivityManagerNative.getDefault().setVrMode(mToken, enabled, requestedComponent) 6288 != 0) { 6289 throw new PackageManager.NameNotFoundException( 6290 requestedComponent.flattenToString()); 6291 } 6292 } catch (RemoteException e) { 6293 // pass 6294 } 6295 } 6296 6297 /** 6298 * Start an action mode of the default type {@link ActionMode#TYPE_PRIMARY}. 6299 * 6300 * @param callback Callback that will manage lifecycle events for this action mode 6301 * @return The ActionMode that was started, or null if it was canceled 6302 * 6303 * @see ActionMode 6304 */ 6305 @Nullable 6306 public ActionMode startActionMode(ActionMode.Callback callback) { 6307 return mWindow.getDecorView().startActionMode(callback); 6308 } 6309 6310 /** 6311 * Start an action mode of the given type. 6312 * 6313 * @param callback Callback that will manage lifecycle events for this action mode 6314 * @param type One of {@link ActionMode#TYPE_PRIMARY} or {@link ActionMode#TYPE_FLOATING}. 6315 * @return The ActionMode that was started, or null if it was canceled 6316 * 6317 * @see ActionMode 6318 */ 6319 @Nullable 6320 public ActionMode startActionMode(ActionMode.Callback callback, int type) { 6321 return mWindow.getDecorView().startActionMode(callback, type); 6322 } 6323 6324 /** 6325 * Give the Activity a chance to control the UI for an action mode requested 6326 * by the system. 6327 * 6328 * <p>Note: If you are looking for a notification callback that an action mode 6329 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 6330 * 6331 * @param callback The callback that should control the new action mode 6332 * @return The new action mode, or <code>null</code> if the activity does not want to 6333 * provide special handling for this action mode. (It will be handled by the system.) 6334 */ 6335 @Nullable 6336 @Override 6337 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 6338 // Only Primary ActionModes are represented in the ActionBar. 6339 if (mActionModeTypeStarting == ActionMode.TYPE_PRIMARY) { 6340 initWindowDecorActionBar(); 6341 if (mActionBar != null) { 6342 return mActionBar.startActionMode(callback); 6343 } 6344 } 6345 return null; 6346 } 6347 6348 /** 6349 * {@inheritDoc} 6350 */ 6351 @Nullable 6352 @Override 6353 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback, int type) { 6354 try { 6355 mActionModeTypeStarting = type; 6356 return onWindowStartingActionMode(callback); 6357 } finally { 6358 mActionModeTypeStarting = ActionMode.TYPE_PRIMARY; 6359 } 6360 } 6361 6362 /** 6363 * Notifies the Activity that an action mode has been started. 6364 * Activity subclasses overriding this method should call the superclass implementation. 6365 * 6366 * @param mode The new action mode. 6367 */ 6368 @CallSuper 6369 @Override 6370 public void onActionModeStarted(ActionMode mode) { 6371 } 6372 6373 /** 6374 * Notifies the activity that an action mode has finished. 6375 * Activity subclasses overriding this method should call the superclass implementation. 6376 * 6377 * @param mode The action mode that just finished. 6378 */ 6379 @CallSuper 6380 @Override 6381 public void onActionModeFinished(ActionMode mode) { 6382 } 6383 6384 /** 6385 * Returns true if the app should recreate the task when navigating 'up' from this activity 6386 * by using targetIntent. 6387 * 6388 * <p>If this method returns false the app can trivially call 6389 * {@link #navigateUpTo(Intent)} using the same parameters to correctly perform 6390 * up navigation. If this method returns false, the app should synthesize a new task stack 6391 * by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation.</p> 6392 * 6393 * @param targetIntent An intent representing the target destination for up navigation 6394 * @return true if navigating up should recreate a new task stack, false if the same task 6395 * should be used for the destination 6396 */ 6397 public boolean shouldUpRecreateTask(Intent targetIntent) { 6398 try { 6399 PackageManager pm = getPackageManager(); 6400 ComponentName cn = targetIntent.getComponent(); 6401 if (cn == null) { 6402 cn = targetIntent.resolveActivity(pm); 6403 } 6404 ActivityInfo info = pm.getActivityInfo(cn, 0); 6405 if (info.taskAffinity == null) { 6406 return false; 6407 } 6408 return ActivityManagerNative.getDefault() 6409 .shouldUpRecreateTask(mToken, info.taskAffinity); 6410 } catch (RemoteException e) { 6411 return false; 6412 } catch (NameNotFoundException e) { 6413 return false; 6414 } 6415 } 6416 6417 /** 6418 * Navigate from this activity to the activity specified by upIntent, finishing this activity 6419 * in the process. If the activity indicated by upIntent already exists in the task's history, 6420 * this activity and all others before the indicated activity in the history stack will be 6421 * finished. 6422 * 6423 * <p>If the indicated activity does not appear in the history stack, this will finish 6424 * each activity in this task until the root activity of the task is reached, resulting in 6425 * an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy 6426 * when an activity may be reached by a path not passing through a canonical parent 6427 * activity.</p> 6428 * 6429 * <p>This method should be used when performing up navigation from within the same task 6430 * as the destination. If up navigation should cross tasks in some cases, see 6431 * {@link #shouldUpRecreateTask(Intent)}.</p> 6432 * 6433 * @param upIntent An intent representing the target destination for up navigation 6434 * 6435 * @return true if up navigation successfully reached the activity indicated by upIntent and 6436 * upIntent was delivered to it. false if an instance of the indicated activity could 6437 * not be found and this activity was simply finished normally. 6438 */ 6439 public boolean navigateUpTo(Intent upIntent) { 6440 if (mParent == null) { 6441 ComponentName destInfo = upIntent.getComponent(); 6442 if (destInfo == null) { 6443 destInfo = upIntent.resolveActivity(getPackageManager()); 6444 if (destInfo == null) { 6445 return false; 6446 } 6447 upIntent = new Intent(upIntent); 6448 upIntent.setComponent(destInfo); 6449 } 6450 int resultCode; 6451 Intent resultData; 6452 synchronized (this) { 6453 resultCode = mResultCode; 6454 resultData = mResultData; 6455 } 6456 if (resultData != null) { 6457 resultData.prepareToLeaveProcess(this); 6458 } 6459 try { 6460 upIntent.prepareToLeaveProcess(this); 6461 return ActivityManagerNative.getDefault().navigateUpTo(mToken, upIntent, 6462 resultCode, resultData); 6463 } catch (RemoteException e) { 6464 return false; 6465 } 6466 } else { 6467 return mParent.navigateUpToFromChild(this, upIntent); 6468 } 6469 } 6470 6471 /** 6472 * This is called when a child activity of this one calls its 6473 * {@link #navigateUpTo} method. The default implementation simply calls 6474 * navigateUpTo(upIntent) on this activity (the parent). 6475 * 6476 * @param child The activity making the call. 6477 * @param upIntent An intent representing the target destination for up navigation 6478 * 6479 * @return true if up navigation successfully reached the activity indicated by upIntent and 6480 * upIntent was delivered to it. false if an instance of the indicated activity could 6481 * not be found and this activity was simply finished normally. 6482 */ 6483 public boolean navigateUpToFromChild(Activity child, Intent upIntent) { 6484 return navigateUpTo(upIntent); 6485 } 6486 6487 /** 6488 * Obtain an {@link Intent} that will launch an explicit target activity specified by 6489 * this activity's logical parent. The logical parent is named in the application's manifest 6490 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute. 6491 * Activity subclasses may override this method to modify the Intent returned by 6492 * super.getParentActivityIntent() or to implement a different mechanism of retrieving 6493 * the parent intent entirely. 6494 * 6495 * @return a new Intent targeting the defined parent of this activity or null if 6496 * there is no valid parent. 6497 */ 6498 @Nullable 6499 public Intent getParentActivityIntent() { 6500 final String parentName = mActivityInfo.parentActivityName; 6501 if (TextUtils.isEmpty(parentName)) { 6502 return null; 6503 } 6504 6505 // If the parent itself has no parent, generate a main activity intent. 6506 final ComponentName target = new ComponentName(this, parentName); 6507 try { 6508 final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0); 6509 final String parentActivity = parentInfo.parentActivityName; 6510 final Intent parentIntent = parentActivity == null 6511 ? Intent.makeMainActivity(target) 6512 : new Intent().setComponent(target); 6513 return parentIntent; 6514 } catch (NameNotFoundException e) { 6515 Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName + 6516 "' in manifest"); 6517 return null; 6518 } 6519 } 6520 6521 /** 6522 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6523 * android.view.View, String)} was used to start an Activity, <var>callback</var> 6524 * will be called to handle shared elements on the <i>launched</i> Activity. This requires 6525 * {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 6526 * 6527 * @param callback Used to manipulate shared element transitions on the launched Activity. 6528 */ 6529 public void setEnterSharedElementCallback(SharedElementCallback callback) { 6530 if (callback == null) { 6531 callback = SharedElementCallback.NULL_CALLBACK; 6532 } 6533 mEnterTransitionListener = callback; 6534 } 6535 6536 /** 6537 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6538 * android.view.View, String)} was used to start an Activity, <var>callback</var> 6539 * will be called to handle shared elements on the <i>launching</i> Activity. Most 6540 * calls will only come when returning from the started Activity. 6541 * This requires {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 6542 * 6543 * @param callback Used to manipulate shared element transitions on the launching Activity. 6544 */ 6545 public void setExitSharedElementCallback(SharedElementCallback callback) { 6546 if (callback == null) { 6547 callback = SharedElementCallback.NULL_CALLBACK; 6548 } 6549 mExitTransitionListener = callback; 6550 } 6551 6552 /** 6553 * Postpone the entering activity transition when Activity was started with 6554 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6555 * android.util.Pair[])}. 6556 * <p>This method gives the Activity the ability to delay starting the entering and 6557 * shared element transitions until all data is loaded. Until then, the Activity won't 6558 * draw into its window, leaving the window transparent. This may also cause the 6559 * returning animation to be delayed until data is ready. This method should be 6560 * called in {@link #onCreate(android.os.Bundle)} or in 6561 * {@link #onActivityReenter(int, android.content.Intent)}. 6562 * {@link #startPostponedEnterTransition()} must be called to allow the Activity to 6563 * start the transitions. If the Activity did not use 6564 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6565 * android.util.Pair[])}, then this method does nothing.</p> 6566 */ 6567 public void postponeEnterTransition() { 6568 mActivityTransitionState.postponeEnterTransition(); 6569 } 6570 6571 /** 6572 * Begin postponed transitions after {@link #postponeEnterTransition()} was called. 6573 * If postponeEnterTransition() was called, you must call startPostponedEnterTransition() 6574 * to have your Activity start drawing. 6575 */ 6576 public void startPostponedEnterTransition() { 6577 mActivityTransitionState.startPostponedEnterTransition(); 6578 } 6579 6580 /** 6581 * Create {@link DragAndDropPermissions} object bound to this activity and controlling the 6582 * access permissions for content URIs associated with the {@link DragEvent}. 6583 * @param event Drag event 6584 * @return The {@link DragAndDropPermissions} object used to control access to the content URIs. 6585 * Null if no content URIs are associated with the event or if permissions could not be granted. 6586 */ 6587 public DragAndDropPermissions requestDragAndDropPermissions(DragEvent event) { 6588 DragAndDropPermissions dragAndDropPermissions = DragAndDropPermissions.obtain(event); 6589 if (dragAndDropPermissions != null && dragAndDropPermissions.take(getActivityToken())) { 6590 return dragAndDropPermissions; 6591 } 6592 return null; 6593 } 6594 6595 // ------------------ Internal API ------------------ 6596 6597 final void setParent(Activity parent) { 6598 mParent = parent; 6599 } 6600 6601 final void attach(Context context, ActivityThread aThread, 6602 Instrumentation instr, IBinder token, int ident, 6603 Application application, Intent intent, ActivityInfo info, 6604 CharSequence title, Activity parent, String id, 6605 NonConfigurationInstances lastNonConfigurationInstances, 6606 Configuration config, String referrer, IVoiceInteractor voiceInteractor, 6607 Window window) { 6608 attachBaseContext(context); 6609 6610 mFragments.attachHost(null /*parent*/); 6611 6612 mWindow = new PhoneWindow(this, window); 6613 mWindow.setWindowControllerCallback(this); 6614 mWindow.setCallback(this); 6615 mWindow.setOnWindowDismissedCallback(this); 6616 mWindow.getLayoutInflater().setPrivateFactory(this); 6617 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 6618 mWindow.setSoftInputMode(info.softInputMode); 6619 } 6620 if (info.uiOptions != 0) { 6621 mWindow.setUiOptions(info.uiOptions); 6622 } 6623 mUiThread = Thread.currentThread(); 6624 6625 mMainThread = aThread; 6626 mInstrumentation = instr; 6627 mToken = token; 6628 mIdent = ident; 6629 mApplication = application; 6630 mIntent = intent; 6631 mReferrer = referrer; 6632 mComponent = intent.getComponent(); 6633 mActivityInfo = info; 6634 mTitle = title; 6635 mParent = parent; 6636 mEmbeddedID = id; 6637 mLastNonConfigurationInstances = lastNonConfigurationInstances; 6638 if (voiceInteractor != null) { 6639 if (lastNonConfigurationInstances != null) { 6640 mVoiceInteractor = lastNonConfigurationInstances.voiceInteractor; 6641 } else { 6642 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 6643 Looper.myLooper()); 6644 } 6645 } 6646 6647 mWindow.setWindowManager( 6648 (WindowManager)context.getSystemService(Context.WINDOW_SERVICE), 6649 mToken, mComponent.flattenToString(), 6650 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 6651 if (mParent != null) { 6652 mWindow.setContainer(mParent.getWindow()); 6653 } 6654 mWindowManager = mWindow.getWindowManager(); 6655 mCurrentConfig = config; 6656 } 6657 6658 /** @hide */ 6659 public final IBinder getActivityToken() { 6660 return mParent != null ? mParent.getActivityToken() : mToken; 6661 } 6662 6663 final void performCreateCommon() { 6664 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 6665 com.android.internal.R.styleable.Window_windowNoDisplay, false); 6666 mFragments.dispatchActivityCreated(); 6667 } 6668 6669 final void performCreate(Bundle icicle) { 6670 restoreHasCurrentPermissionRequest(icicle); 6671 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6672 onCreate(icicle); 6673 mActivityTransitionState.readState(icicle); 6674 performCreateCommon(); 6675 } 6676 6677 final void performCreate(Bundle icicle, PersistableBundle persistentState) { 6678 restoreHasCurrentPermissionRequest(icicle); 6679 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6680 onCreate(icicle, persistentState); 6681 mActivityTransitionState.readState(icicle); 6682 performCreateCommon(); 6683 } 6684 6685 final void performStart() { 6686 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6687 mFragments.noteStateNotSaved(); 6688 mCalled = false; 6689 mFragments.execPendingActions(); 6690 mInstrumentation.callActivityOnStart(this); 6691 if (!mCalled) { 6692 throw new SuperNotCalledException( 6693 "Activity " + mComponent.toShortString() + 6694 " did not call through to super.onStart()"); 6695 } 6696 mFragments.dispatchStart(); 6697 mFragments.reportLoaderStart(); 6698 6699 // This property is set for all builds except final release 6700 boolean isDlwarningEnabled = SystemProperties.getInt("ro.bionic.ld.warning", 0) == 1; 6701 boolean isAppDebuggable = 6702 (mApplication.getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0; 6703 6704 if (isAppDebuggable || isDlwarningEnabled) { 6705 String dlwarning = getDlWarning(); 6706 if (dlwarning != null) { 6707 String appName = getApplicationInfo().loadLabel(getPackageManager()) 6708 .toString(); 6709 String warning = "Detected problems with app native libraries\n" + 6710 "(please consult log for detail):\n" + dlwarning; 6711 if (isAppDebuggable) { 6712 new AlertDialog.Builder(this). 6713 setTitle(appName). 6714 setMessage(warning). 6715 setPositiveButton(android.R.string.ok, null). 6716 setCancelable(false). 6717 show(); 6718 } else { 6719 Toast.makeText(this, appName + "\n" + warning, Toast.LENGTH_LONG).show(); 6720 } 6721 } 6722 } 6723 6724 mActivityTransitionState.enterReady(this); 6725 } 6726 6727 final void performRestart() { 6728 mFragments.noteStateNotSaved(); 6729 6730 if (mToken != null && mParent == null) { 6731 // No need to check mStopped, the roots will check if they were actually stopped. 6732 WindowManagerGlobal.getInstance().setStoppedState(mToken, false /* stopped */); 6733 } 6734 6735 if (mStopped) { 6736 mStopped = false; 6737 6738 synchronized (mManagedCursors) { 6739 final int N = mManagedCursors.size(); 6740 for (int i=0; i<N; i++) { 6741 ManagedCursor mc = mManagedCursors.get(i); 6742 if (mc.mReleased || mc.mUpdated) { 6743 if (!mc.mCursor.requery()) { 6744 if (getApplicationInfo().targetSdkVersion 6745 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 6746 throw new IllegalStateException( 6747 "trying to requery an already closed cursor " 6748 + mc.mCursor); 6749 } 6750 } 6751 mc.mReleased = false; 6752 mc.mUpdated = false; 6753 } 6754 } 6755 } 6756 6757 mCalled = false; 6758 mInstrumentation.callActivityOnRestart(this); 6759 if (!mCalled) { 6760 throw new SuperNotCalledException( 6761 "Activity " + mComponent.toShortString() + 6762 " did not call through to super.onRestart()"); 6763 } 6764 performStart(); 6765 } 6766 } 6767 6768 final void performResume() { 6769 performRestart(); 6770 6771 mFragments.execPendingActions(); 6772 6773 mLastNonConfigurationInstances = null; 6774 6775 mCalled = false; 6776 // mResumed is set by the instrumentation 6777 mInstrumentation.callActivityOnResume(this); 6778 if (!mCalled) { 6779 throw new SuperNotCalledException( 6780 "Activity " + mComponent.toShortString() + 6781 " did not call through to super.onResume()"); 6782 } 6783 6784 // invisible activities must be finished before onResume() completes 6785 if (!mVisibleFromClient && !mFinished) { 6786 Log.w(TAG, "An activity without a UI must call finish() before onResume() completes"); 6787 if (getApplicationInfo().targetSdkVersion 6788 > android.os.Build.VERSION_CODES.LOLLIPOP_MR1) { 6789 throw new IllegalStateException( 6790 "Activity " + mComponent.toShortString() + 6791 " did not call finish() prior to onResume() completing"); 6792 } 6793 } 6794 6795 // Now really resume, and install the current status bar and menu. 6796 mCalled = false; 6797 6798 mFragments.dispatchResume(); 6799 mFragments.execPendingActions(); 6800 6801 onPostResume(); 6802 if (!mCalled) { 6803 throw new SuperNotCalledException( 6804 "Activity " + mComponent.toShortString() + 6805 " did not call through to super.onPostResume()"); 6806 } 6807 } 6808 6809 final void performPause() { 6810 mDoReportFullyDrawn = false; 6811 mFragments.dispatchPause(); 6812 mCalled = false; 6813 onPause(); 6814 mResumed = false; 6815 if (!mCalled && getApplicationInfo().targetSdkVersion 6816 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 6817 throw new SuperNotCalledException( 6818 "Activity " + mComponent.toShortString() + 6819 " did not call through to super.onPause()"); 6820 } 6821 mResumed = false; 6822 } 6823 6824 final void performUserLeaving() { 6825 onUserInteraction(); 6826 onUserLeaveHint(); 6827 } 6828 6829 final void performStop(boolean preserveWindow) { 6830 mDoReportFullyDrawn = false; 6831 mFragments.doLoaderStop(mChangingConfigurations /*retain*/); 6832 6833 if (!mStopped) { 6834 if (mWindow != null) { 6835 mWindow.closeAllPanels(); 6836 } 6837 6838 // If we're preserving the window, don't setStoppedState to true, since we 6839 // need the window started immediately again. Stopping the window will 6840 // destroys hardware resources and causes flicker. 6841 if (!preserveWindow && mToken != null && mParent == null) { 6842 WindowManagerGlobal.getInstance().setStoppedState(mToken, true); 6843 } 6844 6845 mFragments.dispatchStop(); 6846 6847 mCalled = false; 6848 mInstrumentation.callActivityOnStop(this); 6849 if (!mCalled) { 6850 throw new SuperNotCalledException( 6851 "Activity " + mComponent.toShortString() + 6852 " did not call through to super.onStop()"); 6853 } 6854 6855 synchronized (mManagedCursors) { 6856 final int N = mManagedCursors.size(); 6857 for (int i=0; i<N; i++) { 6858 ManagedCursor mc = mManagedCursors.get(i); 6859 if (!mc.mReleased) { 6860 mc.mCursor.deactivate(); 6861 mc.mReleased = true; 6862 } 6863 } 6864 } 6865 6866 mStopped = true; 6867 } 6868 mResumed = false; 6869 } 6870 6871 final void performDestroy() { 6872 mDestroyed = true; 6873 mWindow.destroy(); 6874 mFragments.dispatchDestroy(); 6875 onDestroy(); 6876 mFragments.doLoaderDestroy(); 6877 if (mVoiceInteractor != null) { 6878 mVoiceInteractor.detachActivity(); 6879 } 6880 } 6881 6882 final void dispatchMultiWindowModeChanged(boolean isInMultiWindowMode) { 6883 if (DEBUG_LIFECYCLE) Slog.v(TAG, 6884 "dispatchMultiWindowModeChanged " + this + ": " + isInMultiWindowMode); 6885 mFragments.dispatchMultiWindowModeChanged(isInMultiWindowMode); 6886 if (mWindow != null) { 6887 mWindow.onMultiWindowModeChanged(); 6888 } 6889 onMultiWindowModeChanged(isInMultiWindowMode); 6890 } 6891 6892 final void dispatchPictureInPictureModeChanged(boolean isInPictureInPictureMode) { 6893 if (DEBUG_LIFECYCLE) Slog.v(TAG, 6894 "dispatchPictureInPictureModeChanged " + this + ": " + isInPictureInPictureMode); 6895 mFragments.dispatchPictureInPictureModeChanged(isInPictureInPictureMode); 6896 onPictureInPictureModeChanged(isInPictureInPictureMode); 6897 } 6898 6899 /** 6900 * @hide 6901 */ 6902 public final boolean isResumed() { 6903 return mResumed; 6904 } 6905 6906 private void storeHasCurrentPermissionRequest(Bundle bundle) { 6907 if (bundle != null && mHasCurrentPermissionsRequest) { 6908 bundle.putBoolean(HAS_CURENT_PERMISSIONS_REQUEST_KEY, true); 6909 } 6910 } 6911 6912 private void restoreHasCurrentPermissionRequest(Bundle bundle) { 6913 if (bundle != null) { 6914 mHasCurrentPermissionsRequest = bundle.getBoolean( 6915 HAS_CURENT_PERMISSIONS_REQUEST_KEY, false); 6916 } 6917 } 6918 6919 void dispatchActivityResult(String who, int requestCode, 6920 int resultCode, Intent data) { 6921 if (false) Log.v( 6922 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 6923 + ", resCode=" + resultCode + ", data=" + data); 6924 mFragments.noteStateNotSaved(); 6925 if (who == null) { 6926 onActivityResult(requestCode, resultCode, data); 6927 } else if (who.startsWith(REQUEST_PERMISSIONS_WHO_PREFIX)) { 6928 who = who.substring(REQUEST_PERMISSIONS_WHO_PREFIX.length()); 6929 if (TextUtils.isEmpty(who)) { 6930 dispatchRequestPermissionsResult(requestCode, data); 6931 } else { 6932 Fragment frag = mFragments.findFragmentByWho(who); 6933 if (frag != null) { 6934 dispatchRequestPermissionsResultToFragment(requestCode, data, frag); 6935 } 6936 } 6937 } else if (who.startsWith("@android:view:")) { 6938 ArrayList<ViewRootImpl> views = WindowManagerGlobal.getInstance().getRootViews( 6939 getActivityToken()); 6940 for (ViewRootImpl viewRoot : views) { 6941 if (viewRoot.getView() != null 6942 && viewRoot.getView().dispatchActivityResult( 6943 who, requestCode, resultCode, data)) { 6944 return; 6945 } 6946 } 6947 } else { 6948 Fragment frag = mFragments.findFragmentByWho(who); 6949 if (frag != null) { 6950 frag.onActivityResult(requestCode, resultCode, data); 6951 } 6952 } 6953 } 6954 6955 /** 6956 * Request to put this Activity in a mode where the user is locked to the 6957 * current task. 6958 * 6959 * This will prevent the user from launching other apps, going to settings, or reaching the 6960 * home screen. This does not include those apps whose {@link android.R.attr#lockTaskMode} 6961 * values permit launching while locked. 6962 * 6963 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns true or 6964 * lockTaskMode=lockTaskModeAlways for this component then the app will go directly into 6965 * Lock Task mode. The user will not be able to exit this mode until 6966 * {@link Activity#stopLockTask()} is called. 6967 * 6968 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns false 6969 * then the system will prompt the user with a dialog requesting permission to enter 6970 * this mode. When entered through this method the user can exit at any time through 6971 * an action described by the request dialog. Calling stopLockTask will also exit the 6972 * mode. 6973 * 6974 * @see android.R.attr#lockTaskMode 6975 */ 6976 public void startLockTask() { 6977 try { 6978 ActivityManagerNative.getDefault().startLockTaskMode(mToken); 6979 } catch (RemoteException e) { 6980 } 6981 } 6982 6983 /** 6984 * Allow the user to switch away from the current task. 6985 * 6986 * Called to end the mode started by {@link Activity#startLockTask}. This 6987 * can only be called by activities that have successfully called 6988 * startLockTask previously. 6989 * 6990 * This will allow the user to exit this app and move onto other activities. 6991 * <p>Note: This method should only be called when the activity is user-facing. That is, 6992 * between onResume() and onPause(). 6993 * <p>Note: If there are other tasks below this one that are also locked then calling this 6994 * method will immediately finish this task and resume the previous locked one, remaining in 6995 * lockTask mode. 6996 * 6997 * @see android.R.attr#lockTaskMode 6998 * @see ActivityManager#getLockTaskModeState() 6999 */ 7000 public void stopLockTask() { 7001 try { 7002 ActivityManagerNative.getDefault().stopLockTaskMode(); 7003 } catch (RemoteException e) { 7004 } 7005 } 7006 7007 /** 7008 * Shows the user the system defined message for telling the user how to exit 7009 * lock task mode. The task containing this activity must be in lock task mode at the time 7010 * of this call for the message to be displayed. 7011 */ 7012 public void showLockTaskEscapeMessage() { 7013 try { 7014 ActivityManagerNative.getDefault().showLockTaskEscapeMessage(mToken); 7015 } catch (RemoteException e) { 7016 } 7017 } 7018 7019 /** 7020 * Check whether the caption on freeform windows is displayed directly on the content. 7021 * 7022 * @return True if caption is displayed on content, false if it pushes the content down. 7023 * 7024 * @see {@link #setOverlayWithDecorCaptionEnabled(boolean)} 7025 * 7026 * @hide 7027 */ 7028 public boolean isOverlayWithDecorCaptionEnabled() { 7029 return mWindow.isOverlayWithDecorCaptionEnabled(); 7030 } 7031 7032 /** 7033 * Set whether the caption should displayed directly on the content rather than push it down. 7034 * 7035 * This affects only freeform windows since they display the caption and only the main 7036 * window of the activity. The caption is used to drag the window around and also shows 7037 * maximize and close action buttons. 7038 * 7039 * @hide 7040 */ 7041 public void setOverlayWithDecorCaptionEnabled(boolean enabled) { 7042 mWindow.setOverlayWithDecorCaptionEnabled(enabled); 7043 } 7044 7045 /** 7046 * Interface for informing a translucent {@link Activity} once all visible activities below it 7047 * have completed drawing. This is necessary only after an {@link Activity} has been made 7048 * opaque using {@link Activity#convertFromTranslucent()} and before it has been drawn 7049 * translucent again following a call to {@link 7050 * Activity#convertToTranslucent(android.app.Activity.TranslucentConversionListener, 7051 * ActivityOptions)} 7052 * 7053 * @hide 7054 */ 7055 @SystemApi 7056 public interface TranslucentConversionListener { 7057 /** 7058 * Callback made following {@link Activity#convertToTranslucent} once all visible Activities 7059 * below the top one have been redrawn. Following this callback it is safe to make the top 7060 * Activity translucent because the underlying Activity has been drawn. 7061 * 7062 * @param drawComplete True if the background Activity has drawn itself. False if a timeout 7063 * occurred waiting for the Activity to complete drawing. 7064 * 7065 * @see Activity#convertFromTranslucent() 7066 * @see Activity#convertToTranslucent(TranslucentConversionListener, ActivityOptions) 7067 */ 7068 public void onTranslucentConversionComplete(boolean drawComplete); 7069 } 7070 7071 private void dispatchRequestPermissionsResult(int requestCode, Intent data) { 7072 mHasCurrentPermissionsRequest = false; 7073 // If the package installer crashed we may have not data - best effort. 7074 String[] permissions = (data != null) ? data.getStringArrayExtra( 7075 PackageManager.EXTRA_REQUEST_PERMISSIONS_NAMES) : new String[0]; 7076 final int[] grantResults = (data != null) ? data.getIntArrayExtra( 7077 PackageManager.EXTRA_REQUEST_PERMISSIONS_RESULTS) : new int[0]; 7078 onRequestPermissionsResult(requestCode, permissions, grantResults); 7079 } 7080 7081 private void dispatchRequestPermissionsResultToFragment(int requestCode, Intent data, 7082 Fragment fragment) { 7083 // If the package installer crashed we may have not data - best effort. 7084 String[] permissions = (data != null) ? data.getStringArrayExtra( 7085 PackageManager.EXTRA_REQUEST_PERMISSIONS_NAMES) : new String[0]; 7086 final int[] grantResults = (data != null) ? data.getIntArrayExtra( 7087 PackageManager.EXTRA_REQUEST_PERMISSIONS_RESULTS) : new int[0]; 7088 fragment.onRequestPermissionsResult(requestCode, permissions, grantResults); 7089 } 7090 7091 class HostCallbacks extends FragmentHostCallback<Activity> { 7092 public HostCallbacks() { 7093 super(Activity.this /*activity*/); 7094 } 7095 7096 @Override 7097 public void onDump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 7098 Activity.this.dump(prefix, fd, writer, args); 7099 } 7100 7101 @Override 7102 public boolean onShouldSaveFragmentState(Fragment fragment) { 7103 return !isFinishing(); 7104 } 7105 7106 @Override 7107 public LayoutInflater onGetLayoutInflater() { 7108 final LayoutInflater result = Activity.this.getLayoutInflater(); 7109 if (onUseFragmentManagerInflaterFactory()) { 7110 return result.cloneInContext(Activity.this); 7111 } 7112 return result; 7113 } 7114 7115 @Override 7116 public boolean onUseFragmentManagerInflaterFactory() { 7117 // Newer platform versions use the child fragment manager's LayoutInflaterFactory. 7118 return getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.LOLLIPOP; 7119 } 7120 7121 @Override 7122 public Activity onGetHost() { 7123 return Activity.this; 7124 } 7125 7126 @Override 7127 public void onInvalidateOptionsMenu() { 7128 Activity.this.invalidateOptionsMenu(); 7129 } 7130 7131 @Override 7132 public void onStartActivityFromFragment(Fragment fragment, Intent intent, int requestCode, 7133 Bundle options) { 7134 Activity.this.startActivityFromFragment(fragment, intent, requestCode, options); 7135 } 7136 7137 @Override 7138 public void onStartIntentSenderFromFragment(Fragment fragment, IntentSender intent, 7139 int requestCode, @Nullable Intent fillInIntent, int flagsMask, int flagsValues, 7140 int extraFlags, Bundle options) throws IntentSender.SendIntentException { 7141 if (mParent == null) { 7142 startIntentSenderForResultInner(intent, fragment.mWho, requestCode, fillInIntent, 7143 flagsMask, flagsValues, options); 7144 } else if (options != null) { 7145 mParent.startIntentSenderFromChildFragment(fragment, intent, requestCode, 7146 fillInIntent, flagsMask, flagsValues, extraFlags, options); 7147 } 7148 } 7149 7150 @Override 7151 public void onRequestPermissionsFromFragment(Fragment fragment, String[] permissions, 7152 int requestCode) { 7153 String who = REQUEST_PERMISSIONS_WHO_PREFIX + fragment.mWho; 7154 Intent intent = getPackageManager().buildRequestPermissionsIntent(permissions); 7155 startActivityForResult(who, intent, requestCode, null); 7156 } 7157 7158 @Override 7159 public boolean onHasWindowAnimations() { 7160 return getWindow() != null; 7161 } 7162 7163 @Override 7164 public int onGetWindowAnimations() { 7165 final Window w = getWindow(); 7166 return (w == null) ? 0 : w.getAttributes().windowAnimations; 7167 } 7168 7169 @Override 7170 public void onAttachFragment(Fragment fragment) { 7171 Activity.this.onAttachFragment(fragment); 7172 } 7173 7174 @Nullable 7175 @Override 7176 public View onFindViewById(int id) { 7177 return Activity.this.findViewById(id); 7178 } 7179 7180 @Override 7181 public boolean onHasView() { 7182 final Window w = getWindow(); 7183 return (w != null && w.peekDecorView() != null); 7184 } 7185 } 7186} 7187