Activity.java revision 45768d4c3fcbc57e8e72d4f00eb1cef5ae1ca908
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.admin.DevicePolicyManager; 33import android.app.assist.AssistContent; 34import android.content.ComponentCallbacks2; 35import android.content.ComponentName; 36import android.content.ContentResolver; 37import android.content.Context; 38import android.content.CursorLoader; 39import android.content.IIntentSender; 40import android.content.Intent; 41import android.content.IntentSender; 42import android.content.SharedPreferences; 43import android.content.pm.ActivityInfo; 44import android.content.pm.ApplicationInfo; 45import android.content.pm.PackageManager; 46import android.content.pm.PackageManager.NameNotFoundException; 47import android.content.res.Configuration; 48import android.content.res.Resources; 49import android.content.res.TypedArray; 50import android.database.Cursor; 51import android.graphics.Bitmap; 52import android.graphics.Canvas; 53import android.graphics.Color; 54import android.graphics.drawable.Drawable; 55import android.hardware.input.InputManager; 56import android.media.AudioManager; 57import android.media.session.MediaController; 58import android.net.Uri; 59import android.os.Build; 60import android.os.Bundle; 61import android.os.Handler; 62import android.os.IBinder; 63import android.os.Looper; 64import android.os.Parcelable; 65import android.os.PersistableBundle; 66import android.os.RemoteException; 67import android.os.StrictMode; 68import android.os.SystemProperties; 69import android.os.UserHandle; 70import android.text.Selection; 71import android.text.SpannableStringBuilder; 72import android.text.TextUtils; 73import android.text.method.TextKeyListener; 74import android.transition.Scene; 75import android.transition.TransitionManager; 76import android.util.ArrayMap; 77import android.util.AttributeSet; 78import android.util.EventLog; 79import android.util.Log; 80import android.util.PrintWriterPrinter; 81import android.util.Slog; 82import android.util.SparseArray; 83import android.util.SuperNotCalledException; 84import android.view.ActionMode; 85import android.view.ContextMenu; 86import android.view.ContextMenu.ContextMenuInfo; 87import android.view.ContextThemeWrapper; 88import android.view.DragAndDropPermissions; 89import android.view.DragEvent; 90import android.view.InputDevice; 91import android.view.KeyCharacterMap; 92import android.view.KeyEvent; 93import android.view.KeyboardShortcutGroup; 94import android.view.KeyboardShortcutInfo; 95import android.view.LayoutInflater; 96import android.view.Menu; 97import android.view.MenuInflater; 98import android.view.MenuItem; 99import android.view.MotionEvent; 100import android.view.SearchEvent; 101import android.view.View; 102import android.view.View.OnCreateContextMenuListener; 103import android.view.ViewGroup; 104import android.view.ViewGroup.LayoutParams; 105import android.view.ViewManager; 106import android.view.ViewRootImpl; 107import android.view.Window; 108import android.view.Window.WindowControllerCallback; 109import android.view.WindowManager; 110import android.view.WindowManagerGlobal; 111import android.view.accessibility.AccessibilityEvent; 112import android.widget.AdapterView; 113import android.widget.Toast; 114import android.widget.Toolbar; 115 116import com.android.internal.app.IVoiceInteractor; 117import com.android.internal.app.ToolbarActionBar; 118import com.android.internal.app.WindowDecorActionBar; 119import com.android.internal.policy.PhoneWindow; 120 121import java.io.FileDescriptor; 122import java.io.PrintWriter; 123import java.lang.annotation.Retention; 124import java.lang.annotation.RetentionPolicy; 125import java.util.ArrayList; 126import java.util.HashMap; 127import java.util.List; 128 129/** 130 * An activity is a single, focused thing that the user can do. Almost all 131 * activities interact with the user, so the Activity class takes care of 132 * creating a window for you in which you can place your UI with 133 * {@link #setContentView}. While activities are often presented to the user 134 * as full-screen windows, they can also be used in other ways: as floating 135 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 136 * or embedded inside of another activity (using {@link ActivityGroup}). 137 * 138 * There are two methods almost all subclasses of Activity will implement: 139 * 140 * <ul> 141 * <li> {@link #onCreate} is where you initialize your activity. Most 142 * importantly, here you will usually call {@link #setContentView(int)} 143 * with a layout resource defining your UI, and using {@link #findViewById} 144 * to retrieve the widgets in that UI that you need to interact with 145 * programmatically. 146 * 147 * <li> {@link #onPause} is where you deal with the user leaving your 148 * activity. Most importantly, any changes made by the user should at this 149 * point be committed (usually to the 150 * {@link android.content.ContentProvider} holding the data). 151 * </ul> 152 * 153 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 154 * activity classes must have a corresponding 155 * {@link android.R.styleable#AndroidManifestActivity <activity>} 156 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 157 * 158 * <p>Topics covered here: 159 * <ol> 160 * <li><a href="#Fragments">Fragments</a> 161 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 162 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 163 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 164 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 165 * <li><a href="#Permissions">Permissions</a> 166 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 167 * </ol> 168 * 169 * <div class="special reference"> 170 * <h3>Developer Guides</h3> 171 * <p>The Activity class is an important part of an application's overall lifecycle, 172 * and the way activities are launched and put together is a fundamental 173 * part of the platform's application model. For a detailed perspective on the structure of an 174 * Android application and how activities behave, please read the 175 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 176 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 177 * developer guides.</p> 178 * 179 * <p>You can also find a detailed discussion about how to create activities in the 180 * <a href="{@docRoot}guide/topics/fundamentals/activities.html">Activities</a> 181 * developer guide.</p> 182 * </div> 183 * 184 * <a name="Fragments"></a> 185 * <h3>Fragments</h3> 186 * 187 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 188 * implementations can make use of the {@link Fragment} class to better 189 * modularize their code, build more sophisticated user interfaces for larger 190 * screens, and help scale their application between small and large screens. 191 * 192 * <a name="ActivityLifecycle"></a> 193 * <h3>Activity Lifecycle</h3> 194 * 195 * <p>Activities in the system are managed as an <em>activity stack</em>. 196 * When a new activity is started, it is placed on the top of the stack 197 * and becomes the running activity -- the previous activity always remains 198 * below it in the stack, and will not come to the foreground again until 199 * the new activity exits.</p> 200 * 201 * <p>An activity has essentially four states:</p> 202 * <ul> 203 * <li> If an activity is in the foreground of the screen (at the top of 204 * the stack), 205 * it is <em>active</em> or <em>running</em>. </li> 206 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 207 * or transparent activity has focus on top of your activity), it 208 * is <em>paused</em>. A paused activity is completely alive (it 209 * maintains all state and member information and remains attached to 210 * the window manager), but can be killed by the system in extreme 211 * low memory situations. 212 * <li>If an activity is completely obscured by another activity, 213 * it is <em>stopped</em>. It still retains all state and member information, 214 * however, it is no longer visible to the user so its window is hidden 215 * and it will often be killed by the system when memory is needed 216 * elsewhere.</li> 217 * <li>If an activity is paused or stopped, the system can drop the activity 218 * from memory by either asking it to finish, or simply killing its 219 * process. When it is displayed again to the user, it must be 220 * completely restarted and restored to its previous state.</li> 221 * </ul> 222 * 223 * <p>The following diagram shows the important state paths of an Activity. 224 * The square rectangles represent callback methods you can implement to 225 * perform operations when the Activity moves between states. The colored 226 * ovals are major states the Activity can be in.</p> 227 * 228 * <p><img src="../../../images/activity_lifecycle.png" 229 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 230 * 231 * <p>There are three key loops you may be interested in monitoring within your 232 * activity: 233 * 234 * <ul> 235 * <li>The <b>entire lifetime</b> of an activity happens between the first call 236 * to {@link android.app.Activity#onCreate} through to a single final call 237 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 238 * of "global" state in onCreate(), and release all remaining resources in 239 * onDestroy(). For example, if it has a thread running in the background 240 * to download data from the network, it may create that thread in onCreate() 241 * and then stop the thread in onDestroy(). 242 * 243 * <li>The <b>visible lifetime</b> of an activity happens between a call to 244 * {@link android.app.Activity#onStart} until a corresponding call to 245 * {@link android.app.Activity#onStop}. During this time the user can see the 246 * activity on-screen, though it may not be in the foreground and interacting 247 * with the user. Between these two methods you can maintain resources that 248 * are needed to show the activity to the user. For example, you can register 249 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 250 * that impact your UI, and unregister it in onStop() when the user no 251 * longer sees what you are displaying. The onStart() and onStop() methods 252 * can be called multiple times, as the activity becomes visible and hidden 253 * to the user. 254 * 255 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 256 * {@link android.app.Activity#onResume} until a corresponding call to 257 * {@link android.app.Activity#onPause}. During this time the activity is 258 * in front of all other activities and interacting with the user. An activity 259 * can frequently go between the resumed and paused states -- for example when 260 * the device goes to sleep, when an activity result is delivered, when a new 261 * intent is delivered -- so the code in these methods should be fairly 262 * lightweight. 263 * </ul> 264 * 265 * <p>The entire lifecycle of an activity is defined by the following 266 * Activity methods. All of these are hooks that you can override 267 * to do appropriate work when the activity changes state. All 268 * activities will implement {@link android.app.Activity#onCreate} 269 * to do their initial setup; many will also implement 270 * {@link android.app.Activity#onPause} to commit changes to data and 271 * otherwise prepare to stop interacting with the user. You should always 272 * call up to your superclass when implementing these methods.</p> 273 * 274 * </p> 275 * <pre class="prettyprint"> 276 * public class Activity extends ApplicationContext { 277 * protected void onCreate(Bundle savedInstanceState); 278 * 279 * protected void onStart(); 280 * 281 * protected void onRestart(); 282 * 283 * protected void onResume(); 284 * 285 * protected void onPause(); 286 * 287 * protected void onStop(); 288 * 289 * protected void onDestroy(); 290 * } 291 * </pre> 292 * 293 * <p>In general the movement through an activity's lifecycle looks like 294 * this:</p> 295 * 296 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 297 * <colgroup align="left" span="3" /> 298 * <colgroup align="left" /> 299 * <colgroup align="center" /> 300 * <colgroup align="center" /> 301 * 302 * <thead> 303 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 304 * </thead> 305 * 306 * <tbody> 307 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 308 * <td>Called when the activity is first created. 309 * This is where you should do all of your normal static set up: 310 * create views, bind data to lists, etc. This method also 311 * provides you with a Bundle containing the activity's previously 312 * frozen state, if there was one. 313 * <p>Always followed by <code>onStart()</code>.</td> 314 * <td align="center">No</td> 315 * <td align="center"><code>onStart()</code></td> 316 * </tr> 317 * 318 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 319 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 320 * <td>Called after your activity has been stopped, prior to it being 321 * started again. 322 * <p>Always followed by <code>onStart()</code></td> 323 * <td align="center">No</td> 324 * <td align="center"><code>onStart()</code></td> 325 * </tr> 326 * 327 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 328 * <td>Called when the activity is becoming visible to the user. 329 * <p>Followed by <code>onResume()</code> if the activity comes 330 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 331 * <td align="center">No</td> 332 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 333 * </tr> 334 * 335 * <tr><td rowspan="2" style="border-left: none;"> </td> 336 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 337 * <td>Called when the activity will start 338 * interacting with the user. At this point your activity is at 339 * the top of the activity stack, with user input going to it. 340 * <p>Always followed by <code>onPause()</code>.</td> 341 * <td align="center">No</td> 342 * <td align="center"><code>onPause()</code></td> 343 * </tr> 344 * 345 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 346 * <td>Called when the system is about to start resuming a previous 347 * activity. This is typically used to commit unsaved changes to 348 * persistent data, stop animations and other things that may be consuming 349 * CPU, etc. Implementations of this method must be very quick because 350 * the next activity will not be resumed until this method returns. 351 * <p>Followed by either <code>onResume()</code> if the activity 352 * returns back to the front, or <code>onStop()</code> if it becomes 353 * invisible to the user.</td> 354 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 355 * <td align="center"><code>onResume()</code> or<br> 356 * <code>onStop()</code></td> 357 * </tr> 358 * 359 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 360 * <td>Called when the activity is no longer visible to the user, because 361 * another activity has been resumed and is covering this one. This 362 * may happen either because a new activity is being started, an existing 363 * one is being brought in front of this one, or this one is being 364 * destroyed. 365 * <p>Followed by either <code>onRestart()</code> if 366 * this activity is coming back to interact with the user, or 367 * <code>onDestroy()</code> if this activity is going away.</td> 368 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 369 * <td align="center"><code>onRestart()</code> or<br> 370 * <code>onDestroy()</code></td> 371 * </tr> 372 * 373 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 374 * <td>The final call you receive before your 375 * activity is destroyed. This can happen either because the 376 * activity is finishing (someone called {@link Activity#finish} on 377 * it, or because the system is temporarily destroying this 378 * instance of the activity to save space. You can distinguish 379 * between these two scenarios with the {@link 380 * Activity#isFinishing} method.</td> 381 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 382 * <td align="center"><em>nothing</em></td> 383 * </tr> 384 * </tbody> 385 * </table> 386 * 387 * <p>Note the "Killable" column in the above table -- for those methods that 388 * are marked as being killable, after that method returns the process hosting the 389 * activity may be killed by the system <em>at any time</em> without another line 390 * of its code being executed. Because of this, you should use the 391 * {@link #onPause} method to write any persistent data (such as user edits) 392 * to storage. In addition, the method 393 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 394 * in such a background state, allowing you to save away any dynamic instance 395 * state in your activity into the given Bundle, to be later received in 396 * {@link #onCreate} if the activity needs to be re-created. 397 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 398 * section for more information on how the lifecycle of a process is tied 399 * to the activities it is hosting. Note that it is important to save 400 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 401 * because the latter is not part of the lifecycle callbacks, so will not 402 * be called in every situation as described in its documentation.</p> 403 * 404 * <p class="note">Be aware that these semantics will change slightly between 405 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 406 * vs. those targeting prior platforms. Starting with Honeycomb, an application 407 * is not in the killable state until its {@link #onStop} has returned. This 408 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 409 * safely called after {@link #onPause()} and allows and application to safely 410 * wait until {@link #onStop()} to save persistent state.</p> 411 * 412 * <p>For those methods that are not marked as being killable, the activity's 413 * process will not be killed by the system starting from the time the method 414 * is called and continuing after it returns. Thus an activity is in the killable 415 * state, for example, between after <code>onPause()</code> to the start of 416 * <code>onResume()</code>.</p> 417 * 418 * <a name="ConfigurationChanges"></a> 419 * <h3>Configuration Changes</h3> 420 * 421 * <p>If the configuration of the device (as defined by the 422 * {@link Configuration Resources.Configuration} class) changes, 423 * then anything displaying a user interface will need to update to match that 424 * configuration. Because Activity is the primary mechanism for interacting 425 * with the user, it includes special support for handling configuration 426 * changes.</p> 427 * 428 * <p>Unless you specify otherwise, a configuration change (such as a change 429 * in screen orientation, language, input devices, etc) will cause your 430 * current activity to be <em>destroyed</em>, going through the normal activity 431 * lifecycle process of {@link #onPause}, 432 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 433 * had been in the foreground or visible to the user, once {@link #onDestroy} is 434 * called in that instance then a new instance of the activity will be 435 * created, with whatever savedInstanceState the previous instance had generated 436 * from {@link #onSaveInstanceState}.</p> 437 * 438 * <p>This is done because any application resource, 439 * including layout files, can change based on any configuration value. Thus 440 * the only safe way to handle a configuration change is to re-retrieve all 441 * resources, including layouts, drawables, and strings. Because activities 442 * must already know how to save their state and re-create themselves from 443 * that state, this is a convenient way to have an activity restart itself 444 * with a new configuration.</p> 445 * 446 * <p>In some special cases, you may want to bypass restarting of your 447 * activity based on one or more types of configuration changes. This is 448 * done with the {@link android.R.attr#configChanges android:configChanges} 449 * attribute in its manifest. For any types of configuration changes you say 450 * that you handle there, you will receive a call to your current activity's 451 * {@link #onConfigurationChanged} method instead of being restarted. If 452 * a configuration change involves any that you do not handle, however, the 453 * activity will still be restarted and {@link #onConfigurationChanged} 454 * will not be called.</p> 455 * 456 * <a name="StartingActivities"></a> 457 * <h3>Starting Activities and Getting Results</h3> 458 * 459 * <p>The {@link android.app.Activity#startActivity} 460 * method is used to start a 461 * new activity, which will be placed at the top of the activity stack. It 462 * takes a single argument, an {@link android.content.Intent Intent}, 463 * which describes the activity 464 * to be executed.</p> 465 * 466 * <p>Sometimes you want to get a result back from an activity when it 467 * ends. For example, you may start an activity that lets the user pick 468 * a person in a list of contacts; when it ends, it returns the person 469 * that was selected. To do this, you call the 470 * {@link android.app.Activity#startActivityForResult(Intent, int)} 471 * version with a second integer parameter identifying the call. The result 472 * will come back through your {@link android.app.Activity#onActivityResult} 473 * method.</p> 474 * 475 * <p>When an activity exits, it can call 476 * {@link android.app.Activity#setResult(int)} 477 * to return data back to its parent. It must always supply a result code, 478 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 479 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 480 * return back an Intent containing any additional data it wants. All of this 481 * information appears back on the 482 * parent's <code>Activity.onActivityResult()</code>, along with the integer 483 * identifier it originally supplied.</p> 484 * 485 * <p>If a child activity fails for any reason (such as crashing), the parent 486 * activity will receive a result with the code RESULT_CANCELED.</p> 487 * 488 * <pre class="prettyprint"> 489 * public class MyActivity extends Activity { 490 * ... 491 * 492 * static final int PICK_CONTACT_REQUEST = 0; 493 * 494 * public boolean onKeyDown(int keyCode, KeyEvent event) { 495 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 496 * // When the user center presses, let them pick a contact. 497 * startActivityForResult( 498 * new Intent(Intent.ACTION_PICK, 499 * new Uri("content://contacts")), 500 * PICK_CONTACT_REQUEST); 501 * return true; 502 * } 503 * return false; 504 * } 505 * 506 * protected void onActivityResult(int requestCode, int resultCode, 507 * Intent data) { 508 * if (requestCode == PICK_CONTACT_REQUEST) { 509 * if (resultCode == RESULT_OK) { 510 * // A contact was picked. Here we will just display it 511 * // to the user. 512 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 513 * } 514 * } 515 * } 516 * } 517 * </pre> 518 * 519 * <a name="SavingPersistentState"></a> 520 * <h3>Saving Persistent State</h3> 521 * 522 * <p>There are generally two kinds of persistent state than an activity 523 * will deal with: shared document-like data (typically stored in a SQLite 524 * database using a {@linkplain android.content.ContentProvider content provider}) 525 * and internal state such as user preferences.</p> 526 * 527 * <p>For content provider data, we suggest that activities use a 528 * "edit in place" user model. That is, any edits a user makes are effectively 529 * made immediately without requiring an additional confirmation step. 530 * Supporting this model is generally a simple matter of following two rules:</p> 531 * 532 * <ul> 533 * <li> <p>When creating a new document, the backing database entry or file for 534 * it is created immediately. For example, if the user chooses to write 535 * a new e-mail, a new entry for that e-mail is created as soon as they 536 * start entering data, so that if they go to any other activity after 537 * that point this e-mail will now appear in the list of drafts.</p> 538 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 539 * commit to the backing content provider or file any changes the user 540 * has made. This ensures that those changes will be seen by any other 541 * activity that is about to run. You will probably want to commit 542 * your data even more aggressively at key times during your 543 * activity's lifecycle: for example before starting a new 544 * activity, before finishing your own activity, when the user 545 * switches between input fields, etc.</p> 546 * </ul> 547 * 548 * <p>This model is designed to prevent data loss when a user is navigating 549 * between activities, and allows the system to safely kill an activity (because 550 * system resources are needed somewhere else) at any time after it has been 551 * paused. Note this implies 552 * that the user pressing BACK from your activity does <em>not</em> 553 * mean "cancel" -- it means to leave the activity with its current contents 554 * saved away. Canceling edits in an activity must be provided through 555 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 556 * 557 * <p>See the {@linkplain android.content.ContentProvider content package} for 558 * more information about content providers. These are a key aspect of how 559 * different activities invoke and propagate data between themselves.</p> 560 * 561 * <p>The Activity class also provides an API for managing internal persistent state 562 * associated with an activity. This can be used, for example, to remember 563 * the user's preferred initial display in a calendar (day view or week view) 564 * or the user's default home page in a web browser.</p> 565 * 566 * <p>Activity persistent state is managed 567 * with the method {@link #getPreferences}, 568 * allowing you to retrieve and 569 * modify a set of name/value pairs associated with the activity. To use 570 * preferences that are shared across multiple application components 571 * (activities, receivers, services, providers), you can use the underlying 572 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 573 * to retrieve a preferences 574 * object stored under a specific name. 575 * (Note that it is not possible to share settings data across application 576 * packages -- for that you will need a content provider.)</p> 577 * 578 * <p>Here is an excerpt from a calendar activity that stores the user's 579 * preferred view mode in its persistent settings:</p> 580 * 581 * <pre class="prettyprint"> 582 * public class CalendarActivity extends Activity { 583 * ... 584 * 585 * static final int DAY_VIEW_MODE = 0; 586 * static final int WEEK_VIEW_MODE = 1; 587 * 588 * private SharedPreferences mPrefs; 589 * private int mCurViewMode; 590 * 591 * protected void onCreate(Bundle savedInstanceState) { 592 * super.onCreate(savedInstanceState); 593 * 594 * SharedPreferences mPrefs = getSharedPreferences(); 595 * mCurViewMode = mPrefs.getInt("view_mode", DAY_VIEW_MODE); 596 * } 597 * 598 * protected void onPause() { 599 * super.onPause(); 600 * 601 * SharedPreferences.Editor ed = mPrefs.edit(); 602 * ed.putInt("view_mode", mCurViewMode); 603 * ed.commit(); 604 * } 605 * } 606 * </pre> 607 * 608 * <a name="Permissions"></a> 609 * <h3>Permissions</h3> 610 * 611 * <p>The ability to start a particular Activity can be enforced when it is 612 * declared in its 613 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 614 * tag. By doing so, other applications will need to declare a corresponding 615 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 616 * element in their own manifest to be able to start that activity. 617 * 618 * <p>When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 619 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 620 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the 621 * Activity access to the specific URIs in the Intent. Access will remain 622 * until the Activity has finished (it will remain across the hosting 623 * process being killed and other temporary destruction). As of 624 * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity 625 * was already created and a new Intent is being delivered to 626 * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added 627 * to the existing ones it holds. 628 * 629 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 630 * document for more information on permissions and security in general. 631 * 632 * <a name="ProcessLifecycle"></a> 633 * <h3>Process Lifecycle</h3> 634 * 635 * <p>The Android system attempts to keep application process around for as 636 * long as possible, but eventually will need to remove old processes when 637 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 638 * Lifecycle</a>, the decision about which process to remove is intimately 639 * tied to the state of the user's interaction with it. In general, there 640 * are four states a process can be in based on the activities running in it, 641 * listed here in order of importance. The system will kill less important 642 * processes (the last ones) before it resorts to killing more important 643 * processes (the first ones). 644 * 645 * <ol> 646 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 647 * that the user is currently interacting with) is considered the most important. 648 * Its process will only be killed as a last resort, if it uses more memory 649 * than is available on the device. Generally at this point the device has 650 * reached a memory paging state, so this is required in order to keep the user 651 * interface responsive. 652 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 653 * but not in the foreground, such as one sitting behind a foreground dialog) 654 * is considered extremely important and will not be killed unless that is 655 * required to keep the foreground activity running. 656 * <li> <p>A <b>background activity</b> (an activity that is not visible to 657 * the user and has been paused) is no longer critical, so the system may 658 * safely kill its process to reclaim memory for other foreground or 659 * visible processes. If its process needs to be killed, when the user navigates 660 * back to the activity (making it visible on the screen again), its 661 * {@link #onCreate} method will be called with the savedInstanceState it had previously 662 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 663 * state as the user last left it. 664 * <li> <p>An <b>empty process</b> is one hosting no activities or other 665 * application components (such as {@link Service} or 666 * {@link android.content.BroadcastReceiver} classes). These are killed very 667 * quickly by the system as memory becomes low. For this reason, any 668 * background operation you do outside of an activity must be executed in the 669 * context of an activity BroadcastReceiver or Service to ensure that the system 670 * knows it needs to keep your process around. 671 * </ol> 672 * 673 * <p>Sometimes an Activity may need to do a long-running operation that exists 674 * independently of the activity lifecycle itself. An example may be a camera 675 * application that allows you to upload a picture to a web site. The upload 676 * may take a long time, and the application should allow the user to leave 677 * the application while it is executing. To accomplish this, your Activity 678 * should start a {@link Service} in which the upload takes place. This allows 679 * the system to properly prioritize your process (considering it to be more 680 * important than other non-visible applications) for the duration of the 681 * upload, independent of whether the original activity is paused, stopped, 682 * or finished. 683 */ 684public class Activity extends ContextThemeWrapper 685 implements LayoutInflater.Factory2, 686 Window.Callback, KeyEvent.Callback, 687 OnCreateContextMenuListener, ComponentCallbacks2, 688 Window.OnWindowDismissedCallback, WindowControllerCallback { 689 private static final String TAG = "Activity"; 690 private static final boolean DEBUG_LIFECYCLE = false; 691 692 /** Standard activity result: operation canceled. */ 693 public static final int RESULT_CANCELED = 0; 694 /** Standard activity result: operation succeeded. */ 695 public static final int RESULT_OK = -1; 696 /** Start of user-defined activity results. */ 697 public static final int RESULT_FIRST_USER = 1; 698 699 /** @hide Task isn't finished when activity is finished */ 700 public static final int DONT_FINISH_TASK_WITH_ACTIVITY = 0; 701 /** 702 * @hide Task is finished if the finishing activity is the root of the task. To preserve the 703 * past behavior the task is also removed from recents. 704 */ 705 public static final int FINISH_TASK_WITH_ROOT_ACTIVITY = 1; 706 /** 707 * @hide Task is finished along with the finishing activity, but it is not removed from 708 * recents. 709 */ 710 public static final int FINISH_TASK_WITH_ACTIVITY = 2; 711 712 static final String FRAGMENTS_TAG = "android:fragments"; 713 714 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 715 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 716 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 717 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 718 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 719 private static final String HAS_CURENT_PERMISSIONS_REQUEST_KEY = 720 "android:hasCurrentPermissionsRequest"; 721 722 private static final String REQUEST_PERMISSIONS_WHO_PREFIX = "@android:requestPermissions:"; 723 724 private static final String KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME = "com.android.systemui"; 725 private static final String KEYBOARD_SHORTCUTS_RECEIVER_CLASS_NAME = 726 "com.android.systemui.statusbar.KeyboardShortcutsReceiver"; 727 728 private static class ManagedDialog { 729 Dialog mDialog; 730 Bundle mArgs; 731 } 732 private SparseArray<ManagedDialog> mManagedDialogs; 733 734 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 735 private Instrumentation mInstrumentation; 736 private IBinder mToken; 737 private int mIdent; 738 /*package*/ String mEmbeddedID; 739 private Application mApplication; 740 /*package*/ Intent mIntent; 741 /*package*/ String mReferrer; 742 private ComponentName mComponent; 743 /*package*/ ActivityInfo mActivityInfo; 744 /*package*/ ActivityThread mMainThread; 745 Activity mParent; 746 boolean mCalled; 747 /*package*/ boolean mResumed; 748 /*package*/ boolean mStopped; 749 boolean mFinished; 750 boolean mStartedActivity; 751 private boolean mDestroyed; 752 private boolean mDoReportFullyDrawn = true; 753 /** true if the activity is going through a transient pause */ 754 /*package*/ boolean mTemporaryPause = false; 755 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 756 /*package*/ boolean mChangingConfigurations = false; 757 /*package*/ int mConfigChangeFlags; 758 /*package*/ Configuration mCurrentConfig; 759 private SearchManager mSearchManager; 760 private MenuInflater mMenuInflater; 761 762 static final class NonConfigurationInstances { 763 Object activity; 764 HashMap<String, Object> children; 765 FragmentManagerNonConfig fragments; 766 ArrayMap<String, LoaderManager> loaders; 767 VoiceInteractor voiceInteractor; 768 } 769 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 770 771 private Window mWindow; 772 773 private WindowManager mWindowManager; 774 /*package*/ View mDecor = null; 775 /*package*/ boolean mWindowAdded = false; 776 /*package*/ boolean mVisibleFromServer = false; 777 /*package*/ boolean mVisibleFromClient = true; 778 /*package*/ ActionBar mActionBar = null; 779 private boolean mEnableDefaultActionBarUp; 780 781 private VoiceInteractor mVoiceInteractor; 782 783 private CharSequence mTitle; 784 private int mTitleColor = 0; 785 786 // we must have a handler before the FragmentController is constructed 787 final Handler mHandler = new Handler(); 788 final FragmentController mFragments = FragmentController.createController(new HostCallbacks()); 789 790 // Most recent call to requestVisibleBehind(). 791 boolean mVisibleBehind; 792 793 private static final class ManagedCursor { 794 ManagedCursor(Cursor cursor) { 795 mCursor = cursor; 796 mReleased = false; 797 mUpdated = false; 798 } 799 800 private final Cursor mCursor; 801 private boolean mReleased; 802 private boolean mUpdated; 803 } 804 private final ArrayList<ManagedCursor> mManagedCursors = 805 new ArrayList<ManagedCursor>(); 806 807 // protected by synchronized (this) 808 int mResultCode = RESULT_CANCELED; 809 Intent mResultData = null; 810 811 private TranslucentConversionListener mTranslucentCallback; 812 private boolean mChangeCanvasToTranslucent; 813 814 private SearchEvent mSearchEvent; 815 816 private boolean mTitleReady = false; 817 private int mActionModeTypeStarting = ActionMode.TYPE_PRIMARY; 818 819 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 820 private SpannableStringBuilder mDefaultKeySsb = null; 821 822 private ActivityManager.TaskDescription mTaskDescription = 823 new ActivityManager.TaskDescription(); 824 825 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 826 827 @SuppressWarnings("unused") 828 private final Object mInstanceTracker = StrictMode.trackActivity(this); 829 830 private Thread mUiThread; 831 832 ActivityTransitionState mActivityTransitionState = new ActivityTransitionState(); 833 SharedElementCallback mEnterTransitionListener = SharedElementCallback.NULL_CALLBACK; 834 SharedElementCallback mExitTransitionListener = SharedElementCallback.NULL_CALLBACK; 835 836 private boolean mHasCurrentPermissionsRequest; 837 private boolean mEatKeyUpEvent; 838 839 private static native String getDlWarning(); 840 841 /** Return the intent that started this activity. */ 842 public Intent getIntent() { 843 return mIntent; 844 } 845 846 /** 847 * Change the intent returned by {@link #getIntent}. This holds a 848 * reference to the given intent; it does not copy it. Often used in 849 * conjunction with {@link #onNewIntent}. 850 * 851 * @param newIntent The new Intent object to return from getIntent 852 * 853 * @see #getIntent 854 * @see #onNewIntent 855 */ 856 public void setIntent(Intent newIntent) { 857 mIntent = newIntent; 858 } 859 860 /** Return the application that owns this activity. */ 861 public final Application getApplication() { 862 return mApplication; 863 } 864 865 /** Is this activity embedded inside of another activity? */ 866 public final boolean isChild() { 867 return mParent != null; 868 } 869 870 /** Return the parent activity if this view is an embedded child. */ 871 public final Activity getParent() { 872 return mParent; 873 } 874 875 /** Retrieve the window manager for showing custom windows. */ 876 public WindowManager getWindowManager() { 877 return mWindowManager; 878 } 879 880 /** 881 * Retrieve the current {@link android.view.Window} for the activity. 882 * This can be used to directly access parts of the Window API that 883 * are not available through Activity/Screen. 884 * 885 * @return Window The current window, or null if the activity is not 886 * visual. 887 */ 888 public Window getWindow() { 889 return mWindow; 890 } 891 892 /** 893 * Return the LoaderManager for this activity, creating it if needed. 894 */ 895 public LoaderManager getLoaderManager() { 896 return mFragments.getLoaderManager(); 897 } 898 899 /** 900 * Calls {@link android.view.Window#getCurrentFocus} on the 901 * Window of this Activity to return the currently focused view. 902 * 903 * @return View The current View with focus or null. 904 * 905 * @see #getWindow 906 * @see android.view.Window#getCurrentFocus 907 */ 908 @Nullable 909 public View getCurrentFocus() { 910 return mWindow != null ? mWindow.getCurrentFocus() : null; 911 } 912 913 /** 914 * Called when the activity is starting. This is where most initialization 915 * should go: calling {@link #setContentView(int)} to inflate the 916 * activity's UI, using {@link #findViewById} to programmatically interact 917 * with widgets in the UI, calling 918 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 919 * cursors for data being displayed, etc. 920 * 921 * <p>You can call {@link #finish} from within this function, in 922 * which case onDestroy() will be immediately called without any of the rest 923 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 924 * {@link #onPause}, etc) executing. 925 * 926 * <p><em>Derived classes must call through to the super class's 927 * implementation of this method. If they do not, an exception will be 928 * thrown.</em></p> 929 * 930 * @param savedInstanceState If the activity is being re-initialized after 931 * previously being shut down then this Bundle contains the data it most 932 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 933 * 934 * @see #onStart 935 * @see #onSaveInstanceState 936 * @see #onRestoreInstanceState 937 * @see #onPostCreate 938 */ 939 @MainThread 940 @CallSuper 941 protected void onCreate(@Nullable Bundle savedInstanceState) { 942 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState); 943 if (mLastNonConfigurationInstances != null) { 944 mFragments.restoreLoaderNonConfig(mLastNonConfigurationInstances.loaders); 945 } 946 if (mActivityInfo.parentActivityName != null) { 947 if (mActionBar == null) { 948 mEnableDefaultActionBarUp = true; 949 } else { 950 mActionBar.setDefaultDisplayHomeAsUpEnabled(true); 951 } 952 } 953 if (savedInstanceState != null) { 954 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 955 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 956 ? mLastNonConfigurationInstances.fragments : null); 957 } 958 mFragments.dispatchCreate(); 959 getApplication().dispatchActivityCreated(this, savedInstanceState); 960 if (mVoiceInteractor != null) { 961 mVoiceInteractor.attachActivity(this); 962 } 963 mCalled = true; 964 } 965 966 /** 967 * Same as {@link #onCreate(android.os.Bundle)} but called for those activities created with 968 * the attribute {@link android.R.attr#persistableMode} set to 969 * <code>persistAcrossReboots</code>. 970 * 971 * @param savedInstanceState if the activity is being re-initialized after 972 * previously being shut down then this Bundle contains the data it most 973 * recently supplied in {@link #onSaveInstanceState}. 974 * <b><i>Note: Otherwise it is null.</i></b> 975 * @param persistentState if the activity is being re-initialized after 976 * previously being shut down or powered off then this Bundle contains the data it most 977 * recently supplied to outPersistentState in {@link #onSaveInstanceState}. 978 * <b><i>Note: Otherwise it is null.</i></b> 979 * 980 * @see #onCreate(android.os.Bundle) 981 * @see #onStart 982 * @see #onSaveInstanceState 983 * @see #onRestoreInstanceState 984 * @see #onPostCreate 985 */ 986 public void onCreate(@Nullable Bundle savedInstanceState, 987 @Nullable PersistableBundle persistentState) { 988 onCreate(savedInstanceState); 989 } 990 991 /** 992 * The hook for {@link ActivityThread} to restore the state of this activity. 993 * 994 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 995 * {@link #restoreManagedDialogs(android.os.Bundle)}. 996 * 997 * @param savedInstanceState contains the saved state 998 */ 999 final void performRestoreInstanceState(Bundle savedInstanceState) { 1000 onRestoreInstanceState(savedInstanceState); 1001 restoreManagedDialogs(savedInstanceState); 1002 } 1003 1004 /** 1005 * The hook for {@link ActivityThread} to restore the state of this activity. 1006 * 1007 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 1008 * {@link #restoreManagedDialogs(android.os.Bundle)}. 1009 * 1010 * @param savedInstanceState contains the saved state 1011 * @param persistentState contains the persistable saved state 1012 */ 1013 final void performRestoreInstanceState(Bundle savedInstanceState, 1014 PersistableBundle persistentState) { 1015 onRestoreInstanceState(savedInstanceState, persistentState); 1016 if (savedInstanceState != null) { 1017 restoreManagedDialogs(savedInstanceState); 1018 } 1019 } 1020 1021 /** 1022 * This method is called after {@link #onStart} when the activity is 1023 * being re-initialized from a previously saved state, given here in 1024 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 1025 * to restore their state, but it is sometimes convenient to do it here 1026 * after all of the initialization has been done or to allow subclasses to 1027 * decide whether to use your default implementation. The default 1028 * implementation of this method performs a restore of any view state that 1029 * had previously been frozen by {@link #onSaveInstanceState}. 1030 * 1031 * <p>This method is called between {@link #onStart} and 1032 * {@link #onPostCreate}. 1033 * 1034 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1035 * 1036 * @see #onCreate 1037 * @see #onPostCreate 1038 * @see #onResume 1039 * @see #onSaveInstanceState 1040 */ 1041 protected void onRestoreInstanceState(Bundle savedInstanceState) { 1042 if (mWindow != null) { 1043 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 1044 if (windowState != null) { 1045 mWindow.restoreHierarchyState(windowState); 1046 } 1047 } 1048 } 1049 1050 /** 1051 * This is the same as {@link #onRestoreInstanceState(Bundle)} but is called for activities 1052 * created with the attribute {@link android.R.attr#persistableMode} set to 1053 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1054 * came from the restored PersistableBundle first 1055 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1056 * 1057 * <p>This method is called between {@link #onStart} and 1058 * {@link #onPostCreate}. 1059 * 1060 * <p>If this method is called {@link #onRestoreInstanceState(Bundle)} will not be called. 1061 * 1062 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1063 * @param persistentState the data most recently supplied in {@link #onSaveInstanceState}. 1064 * 1065 * @see #onRestoreInstanceState(Bundle) 1066 * @see #onCreate 1067 * @see #onPostCreate 1068 * @see #onResume 1069 * @see #onSaveInstanceState 1070 */ 1071 public void onRestoreInstanceState(Bundle savedInstanceState, 1072 PersistableBundle persistentState) { 1073 if (savedInstanceState != null) { 1074 onRestoreInstanceState(savedInstanceState); 1075 } 1076 } 1077 1078 /** 1079 * Restore the state of any saved managed dialogs. 1080 * 1081 * @param savedInstanceState The bundle to restore from. 1082 */ 1083 private void restoreManagedDialogs(Bundle savedInstanceState) { 1084 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 1085 if (b == null) { 1086 return; 1087 } 1088 1089 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 1090 final int numDialogs = ids.length; 1091 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 1092 for (int i = 0; i < numDialogs; i++) { 1093 final Integer dialogId = ids[i]; 1094 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 1095 if (dialogState != null) { 1096 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 1097 // so tell createDialog() not to do it, otherwise we get an exception 1098 final ManagedDialog md = new ManagedDialog(); 1099 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 1100 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 1101 if (md.mDialog != null) { 1102 mManagedDialogs.put(dialogId, md); 1103 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 1104 md.mDialog.onRestoreInstanceState(dialogState); 1105 } 1106 } 1107 } 1108 } 1109 1110 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 1111 final Dialog dialog = onCreateDialog(dialogId, args); 1112 if (dialog == null) { 1113 return null; 1114 } 1115 dialog.dispatchOnCreate(state); 1116 return dialog; 1117 } 1118 1119 private static String savedDialogKeyFor(int key) { 1120 return SAVED_DIALOG_KEY_PREFIX + key; 1121 } 1122 1123 private static String savedDialogArgsKeyFor(int key) { 1124 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 1125 } 1126 1127 /** 1128 * Called when activity start-up is complete (after {@link #onStart} 1129 * and {@link #onRestoreInstanceState} have been called). Applications will 1130 * generally not implement this method; it is intended for system 1131 * classes to do final initialization after application code has run. 1132 * 1133 * <p><em>Derived classes must call through to the super class's 1134 * implementation of this method. If they do not, an exception will be 1135 * thrown.</em></p> 1136 * 1137 * @param savedInstanceState If the activity is being re-initialized after 1138 * previously being shut down then this Bundle contains the data it most 1139 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1140 * @see #onCreate 1141 */ 1142 @CallSuper 1143 protected void onPostCreate(@Nullable Bundle savedInstanceState) { 1144 if (!isChild()) { 1145 mTitleReady = true; 1146 onTitleChanged(getTitle(), getTitleColor()); 1147 } 1148 1149 mCalled = true; 1150 } 1151 1152 /** 1153 * This is the same as {@link #onPostCreate(Bundle)} but is called for activities 1154 * created with the attribute {@link android.R.attr#persistableMode} set to 1155 * <code>persistAcrossReboots</code>. 1156 * 1157 * @param savedInstanceState The data most recently supplied in {@link #onSaveInstanceState} 1158 * @param persistentState The data caming from the PersistableBundle first 1159 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1160 * 1161 * @see #onCreate 1162 */ 1163 public void onPostCreate(@Nullable Bundle savedInstanceState, 1164 @Nullable PersistableBundle persistentState) { 1165 onPostCreate(savedInstanceState); 1166 } 1167 1168 /** 1169 * Called after {@link #onCreate} — or after {@link #onRestart} when 1170 * the activity had been stopped, but is now again being displayed to the 1171 * user. It will be followed by {@link #onResume}. 1172 * 1173 * <p><em>Derived classes must call through to the super class's 1174 * implementation of this method. If they do not, an exception will be 1175 * thrown.</em></p> 1176 * 1177 * @see #onCreate 1178 * @see #onStop 1179 * @see #onResume 1180 */ 1181 @CallSuper 1182 protected void onStart() { 1183 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStart " + this); 1184 mCalled = true; 1185 1186 mFragments.doLoaderStart(); 1187 1188 getApplication().dispatchActivityStarted(this); 1189 } 1190 1191 /** 1192 * Called after {@link #onStop} when the current activity is being 1193 * re-displayed to the user (the user has navigated back to it). It will 1194 * be followed by {@link #onStart} and then {@link #onResume}. 1195 * 1196 * <p>For activities that are using raw {@link Cursor} objects (instead of 1197 * creating them through 1198 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1199 * this is usually the place 1200 * where the cursor should be requeried (because you had deactivated it in 1201 * {@link #onStop}. 1202 * 1203 * <p><em>Derived classes must call through to the super class's 1204 * implementation of this method. If they do not, an exception will be 1205 * thrown.</em></p> 1206 * 1207 * @see #onStop 1208 * @see #onStart 1209 * @see #onResume 1210 */ 1211 @CallSuper 1212 protected void onRestart() { 1213 mCalled = true; 1214 } 1215 1216 /** 1217 * Called when an {@link #onResume} is coming up, prior to other pre-resume callbacks 1218 * such as {@link #onNewIntent} and {@link #onActivityResult}. This is primarily intended 1219 * to give the activity a hint that its state is no longer saved -- it will generally 1220 * be called after {@link #onSaveInstanceState} and prior to the activity being 1221 * resumed/started again. 1222 */ 1223 public void onStateNotSaved() { 1224 } 1225 1226 /** 1227 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1228 * {@link #onPause}, for your activity to start interacting with the user. 1229 * This is a good place to begin animations, open exclusive-access devices 1230 * (such as the camera), etc. 1231 * 1232 * <p>Keep in mind that onResume is not the best indicator that your activity 1233 * is visible to the user; a system window such as the keyguard may be in 1234 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1235 * activity is visible to the user (for example, to resume a game). 1236 * 1237 * <p><em>Derived classes must call through to the super class's 1238 * implementation of this method. If they do not, an exception will be 1239 * thrown.</em></p> 1240 * 1241 * @see #onRestoreInstanceState 1242 * @see #onRestart 1243 * @see #onPostResume 1244 * @see #onPause 1245 */ 1246 @CallSuper 1247 protected void onResume() { 1248 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this); 1249 getApplication().dispatchActivityResumed(this); 1250 mActivityTransitionState.onResume(this, isTopOfTask()); 1251 mCalled = true; 1252 } 1253 1254 /** 1255 * Called when activity resume is complete (after {@link #onResume} has 1256 * been called). Applications will generally not implement this method; 1257 * it is intended for system classes to do final setup after application 1258 * resume code has run. 1259 * 1260 * <p><em>Derived classes must call through to the super class's 1261 * implementation of this method. If they do not, an exception will be 1262 * thrown.</em></p> 1263 * 1264 * @see #onResume 1265 */ 1266 @CallSuper 1267 protected void onPostResume() { 1268 final Window win = getWindow(); 1269 if (win != null) win.makeActive(); 1270 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1271 mCalled = true; 1272 } 1273 1274 void setVoiceInteractor(IVoiceInteractor voiceInteractor) { 1275 if (voiceInteractor == null) { 1276 mVoiceInteractor = null; 1277 } else { 1278 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 1279 Looper.myLooper()); 1280 } 1281 } 1282 1283 /** 1284 * Check whether this activity is running as part of a voice interaction with the user. 1285 * If true, it should perform its interaction with the user through the 1286 * {@link VoiceInteractor} returned by {@link #getVoiceInteractor}. 1287 */ 1288 public boolean isVoiceInteraction() { 1289 return mVoiceInteractor != null; 1290 } 1291 1292 /** 1293 * Like {@link #isVoiceInteraction}, but only returns true if this is also the root 1294 * of a voice interaction. That is, returns true if this activity was directly 1295 * started by the voice interaction service as the initiation of a voice interaction. 1296 * Otherwise, for example if it was started by another activity while under voice 1297 * interaction, returns false. 1298 */ 1299 public boolean isVoiceInteractionRoot() { 1300 try { 1301 return mVoiceInteractor != null 1302 && ActivityManagerNative.getDefault().isRootVoiceInteraction(mToken); 1303 } catch (RemoteException e) { 1304 } 1305 return false; 1306 } 1307 1308 /** 1309 * Retrieve the active {@link VoiceInteractor} that the user is going through to 1310 * interact with this activity. 1311 */ 1312 public VoiceInteractor getVoiceInteractor() { 1313 return mVoiceInteractor; 1314 } 1315 1316 /** 1317 * Queries whether the currently enabled voice interaction service supports returning 1318 * a voice interactor for use by the activity. This is valid only for the duration of the 1319 * activity. 1320 * 1321 * @return whether the current voice interaction service supports local voice interaction 1322 */ 1323 public boolean isLocalVoiceInteractionSupported() { 1324 try { 1325 return ActivityManagerNative.getDefault().supportsLocalVoiceInteraction(); 1326 } catch (RemoteException re) { 1327 } 1328 return false; 1329 } 1330 1331 /** 1332 * Starts a local voice interaction session. When ready, 1333 * {@link #onLocalVoiceInteractionStarted()} is called. You can pass a bundle of private options 1334 * to the registered voice interaction service. 1335 * @param privateOptions a Bundle of private arguments to the current voice interaction service 1336 */ 1337 public void startLocalVoiceInteraction(Bundle privateOptions) { 1338 try { 1339 ActivityManagerNative.getDefault().startLocalVoiceInteraction(mToken, privateOptions); 1340 } catch (RemoteException re) { 1341 } 1342 } 1343 1344 /** 1345 * Callback to indicate that {@link #startLocalVoiceInteraction(Bundle)} has resulted in a 1346 * voice interaction session being started. You can now retrieve a voice interactor using 1347 * {@link #getVoiceInteractor()}. 1348 */ 1349 public void onLocalVoiceInteractionStarted() { 1350 } 1351 1352 /** 1353 * Callback to indicate that the local voice interaction has stopped either 1354 * because it was requested through a call to {@link #stopLocalVoiceInteraction()} 1355 * or because it was canceled by the user. The previously acquired {@link VoiceInteractor} 1356 * is no longer valid after this. 1357 */ 1358 public void onLocalVoiceInteractionStopped() { 1359 } 1360 1361 /** 1362 * Request to terminate the current voice interaction that was previously started 1363 * using {@link #startLocalVoiceInteraction(Bundle)}. When the interaction is 1364 * terminated, {@link #onLocalVoiceInteractionStopped()} will be called. 1365 */ 1366 public void stopLocalVoiceInteraction() { 1367 try { 1368 ActivityManagerNative.getDefault().stopLocalVoiceInteraction(mToken); 1369 } catch (RemoteException re) { 1370 } 1371 } 1372 1373 /** 1374 * This is called for activities that set launchMode to "singleTop" in 1375 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1376 * flag when calling {@link #startActivity}. In either case, when the 1377 * activity is re-launched while at the top of the activity stack instead 1378 * of a new instance of the activity being started, onNewIntent() will be 1379 * called on the existing instance with the Intent that was used to 1380 * re-launch it. 1381 * 1382 * <p>An activity will always be paused before receiving a new intent, so 1383 * you can count on {@link #onResume} being called after this method. 1384 * 1385 * <p>Note that {@link #getIntent} still returns the original Intent. You 1386 * can use {@link #setIntent} to update it to this new Intent. 1387 * 1388 * @param intent The new intent that was started for the activity. 1389 * 1390 * @see #getIntent 1391 * @see #setIntent 1392 * @see #onResume 1393 */ 1394 protected void onNewIntent(Intent intent) { 1395 } 1396 1397 /** 1398 * The hook for {@link ActivityThread} to save the state of this activity. 1399 * 1400 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1401 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1402 * 1403 * @param outState The bundle to save the state to. 1404 */ 1405 final void performSaveInstanceState(Bundle outState) { 1406 onSaveInstanceState(outState); 1407 saveManagedDialogs(outState); 1408 mActivityTransitionState.saveState(outState); 1409 storeHasCurrentPermissionRequest(outState); 1410 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState); 1411 } 1412 1413 /** 1414 * The hook for {@link ActivityThread} to save the state of this activity. 1415 * 1416 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1417 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1418 * 1419 * @param outState The bundle to save the state to. 1420 * @param outPersistentState The bundle to save persistent state to. 1421 */ 1422 final void performSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1423 onSaveInstanceState(outState, outPersistentState); 1424 saveManagedDialogs(outState); 1425 storeHasCurrentPermissionRequest(outState); 1426 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState + 1427 ", " + outPersistentState); 1428 } 1429 1430 /** 1431 * Called to retrieve per-instance state from an activity before being killed 1432 * so that the state can be restored in {@link #onCreate} or 1433 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1434 * will be passed to both). 1435 * 1436 * <p>This method is called before an activity may be killed so that when it 1437 * comes back some time in the future it can restore its state. For example, 1438 * if activity B is launched in front of activity A, and at some point activity 1439 * A is killed to reclaim resources, activity A will have a chance to save the 1440 * current state of its user interface via this method so that when the user 1441 * returns to activity A, the state of the user interface can be restored 1442 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1443 * 1444 * <p>Do not confuse this method with activity lifecycle callbacks such as 1445 * {@link #onPause}, which is always called when an activity is being placed 1446 * in the background or on its way to destruction, or {@link #onStop} which 1447 * is called before destruction. One example of when {@link #onPause} and 1448 * {@link #onStop} is called and not this method is when a user navigates back 1449 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1450 * on B because that particular instance will never be restored, so the 1451 * system avoids calling it. An example when {@link #onPause} is called and 1452 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1453 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1454 * killed during the lifetime of B since the state of the user interface of 1455 * A will stay intact. 1456 * 1457 * <p>The default implementation takes care of most of the UI per-instance 1458 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1459 * view in the hierarchy that has an id, and by saving the id of the currently 1460 * focused view (all of which is restored by the default implementation of 1461 * {@link #onRestoreInstanceState}). If you override this method to save additional 1462 * information not captured by each individual view, you will likely want to 1463 * call through to the default implementation, otherwise be prepared to save 1464 * all of the state of each view yourself. 1465 * 1466 * <p>If called, this method will occur before {@link #onStop}. There are 1467 * no guarantees about whether it will occur before or after {@link #onPause}. 1468 * 1469 * @param outState Bundle in which to place your saved state. 1470 * 1471 * @see #onCreate 1472 * @see #onRestoreInstanceState 1473 * @see #onPause 1474 */ 1475 protected void onSaveInstanceState(Bundle outState) { 1476 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1477 Parcelable p = mFragments.saveAllState(); 1478 if (p != null) { 1479 outState.putParcelable(FRAGMENTS_TAG, p); 1480 } 1481 getApplication().dispatchActivitySaveInstanceState(this, outState); 1482 } 1483 1484 /** 1485 * This is the same as {@link #onSaveInstanceState} but is called for activities 1486 * created with the attribute {@link android.R.attr#persistableMode} set to 1487 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1488 * in will be saved and presented in {@link #onCreate(Bundle, PersistableBundle)} 1489 * the first time that this activity is restarted following the next device reboot. 1490 * 1491 * @param outState Bundle in which to place your saved state. 1492 * @param outPersistentState State which will be saved across reboots. 1493 * 1494 * @see #onSaveInstanceState(Bundle) 1495 * @see #onCreate 1496 * @see #onRestoreInstanceState(Bundle, PersistableBundle) 1497 * @see #onPause 1498 */ 1499 public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1500 onSaveInstanceState(outState); 1501 } 1502 1503 /** 1504 * Save the state of any managed dialogs. 1505 * 1506 * @param outState place to store the saved state. 1507 */ 1508 private void saveManagedDialogs(Bundle outState) { 1509 if (mManagedDialogs == null) { 1510 return; 1511 } 1512 1513 final int numDialogs = mManagedDialogs.size(); 1514 if (numDialogs == 0) { 1515 return; 1516 } 1517 1518 Bundle dialogState = new Bundle(); 1519 1520 int[] ids = new int[mManagedDialogs.size()]; 1521 1522 // save each dialog's bundle, gather the ids 1523 for (int i = 0; i < numDialogs; i++) { 1524 final int key = mManagedDialogs.keyAt(i); 1525 ids[i] = key; 1526 final ManagedDialog md = mManagedDialogs.valueAt(i); 1527 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1528 if (md.mArgs != null) { 1529 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1530 } 1531 } 1532 1533 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1534 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1535 } 1536 1537 1538 /** 1539 * Called as part of the activity lifecycle when an activity is going into 1540 * the background, but has not (yet) been killed. The counterpart to 1541 * {@link #onResume}. 1542 * 1543 * <p>When activity B is launched in front of activity A, this callback will 1544 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1545 * so be sure to not do anything lengthy here. 1546 * 1547 * <p>This callback is mostly used for saving any persistent state the 1548 * activity is editing, to present a "edit in place" model to the user and 1549 * making sure nothing is lost if there are not enough resources to start 1550 * the new activity without first killing this one. This is also a good 1551 * place to do things like stop animations and other things that consume a 1552 * noticeable amount of CPU in order to make the switch to the next activity 1553 * as fast as possible, or to close resources that are exclusive access 1554 * such as the camera. 1555 * 1556 * <p>In situations where the system needs more memory it may kill paused 1557 * processes to reclaim resources. Because of this, you should be sure 1558 * that all of your state is saved by the time you return from 1559 * this function. In general {@link #onSaveInstanceState} is used to save 1560 * per-instance state in the activity and this method is used to store 1561 * global persistent data (in content providers, files, etc.) 1562 * 1563 * <p>After receiving this call you will usually receive a following call 1564 * to {@link #onStop} (after the next activity has been resumed and 1565 * displayed), however in some cases there will be a direct call back to 1566 * {@link #onResume} without going through the stopped state. 1567 * 1568 * <p><em>Derived classes must call through to the super class's 1569 * implementation of this method. If they do not, an exception will be 1570 * thrown.</em></p> 1571 * 1572 * @see #onResume 1573 * @see #onSaveInstanceState 1574 * @see #onStop 1575 */ 1576 @CallSuper 1577 protected void onPause() { 1578 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this); 1579 getApplication().dispatchActivityPaused(this); 1580 mCalled = true; 1581 } 1582 1583 /** 1584 * Called as part of the activity lifecycle when an activity is about to go 1585 * into the background as the result of user choice. For example, when the 1586 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1587 * when an incoming phone call causes the in-call Activity to be automatically 1588 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1589 * the activity being interrupted. In cases when it is invoked, this method 1590 * is called right before the activity's {@link #onPause} callback. 1591 * 1592 * <p>This callback and {@link #onUserInteraction} are intended to help 1593 * activities manage status bar notifications intelligently; specifically, 1594 * for helping activities determine the proper time to cancel a notfication. 1595 * 1596 * @see #onUserInteraction() 1597 */ 1598 protected void onUserLeaveHint() { 1599 } 1600 1601 /** 1602 * Generate a new thumbnail for this activity. This method is called before 1603 * pausing the activity, and should draw into <var>outBitmap</var> the 1604 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1605 * can use the given <var>canvas</var>, which is configured to draw into the 1606 * bitmap, for rendering if desired. 1607 * 1608 * <p>The default implementation returns fails and does not draw a thumbnail; 1609 * this will result in the platform creating its own thumbnail if needed. 1610 * 1611 * @param outBitmap The bitmap to contain the thumbnail. 1612 * @param canvas Can be used to render into the bitmap. 1613 * 1614 * @return Return true if you have drawn into the bitmap; otherwise after 1615 * you return it will be filled with a default thumbnail. 1616 * 1617 * @see #onCreateDescription 1618 * @see #onSaveInstanceState 1619 * @see #onPause 1620 */ 1621 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1622 return false; 1623 } 1624 1625 /** 1626 * Generate a new description for this activity. This method is called 1627 * before pausing the activity and can, if desired, return some textual 1628 * description of its current state to be displayed to the user. 1629 * 1630 * <p>The default implementation returns null, which will cause you to 1631 * inherit the description from the previous activity. If all activities 1632 * return null, generally the label of the top activity will be used as the 1633 * description. 1634 * 1635 * @return A description of what the user is doing. It should be short and 1636 * sweet (only a few words). 1637 * 1638 * @see #onCreateThumbnail 1639 * @see #onSaveInstanceState 1640 * @see #onPause 1641 */ 1642 @Nullable 1643 public CharSequence onCreateDescription() { 1644 return null; 1645 } 1646 1647 /** 1648 * This is called when the user is requesting an assist, to build a full 1649 * {@link Intent#ACTION_ASSIST} Intent with all of the context of the current 1650 * application. You can override this method to place into the bundle anything 1651 * you would like to appear in the {@link Intent#EXTRA_ASSIST_CONTEXT} part 1652 * of the assist Intent. 1653 * 1654 * <p>This function will be called after any global assist callbacks that had 1655 * been registered with {@link Application#registerOnProvideAssistDataListener 1656 * Application.registerOnProvideAssistDataListener}. 1657 */ 1658 public void onProvideAssistData(Bundle data) { 1659 } 1660 1661 /** 1662 * This is called when the user is requesting an assist, to provide references 1663 * to content related to the current activity. Before being called, the 1664 * {@code outContent} Intent is filled with the base Intent of the activity (the Intent 1665 * returned by {@link #getIntent()}). The Intent's extras are stripped of any types 1666 * that are not valid for {@link PersistableBundle} or non-framework Parcelables, and 1667 * the flags {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION} and 1668 * {@link Intent#FLAG_GRANT_PERSISTABLE_URI_PERMISSION} are cleared from the Intent. 1669 * 1670 * <p>Custom implementation may adjust the content intent to better reflect the top-level 1671 * context of the activity, and fill in its ClipData with additional content of 1672 * interest that the user is currently viewing. For example, an image gallery application 1673 * that has launched in to an activity allowing the user to swipe through pictures should 1674 * modify the intent to reference the current image they are looking it; such an 1675 * application when showing a list of pictures should add a ClipData that has 1676 * references to all of the pictures currently visible on screen.</p> 1677 * 1678 * @param outContent The assist content to return. 1679 */ 1680 public void onProvideAssistContent(AssistContent outContent) { 1681 } 1682 1683 /** 1684 * Request the Keyboard Shortcuts screen to show up. If it succeeds, this will trigger 1685 * {@link #onProvideKeyboardShortcuts} to retrieve the shortcuts for the foreground activity. 1686 */ 1687 public final void requestKeyboardShortcutsHelper() { 1688 Intent intent = new Intent(Intent.ACTION_SHOW_KEYBOARD_SHORTCUTS); 1689 intent.setComponent(new ComponentName(KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME, 1690 KEYBOARD_SHORTCUTS_RECEIVER_CLASS_NAME)); 1691 sendBroadcast(intent); 1692 } 1693 1694 /** 1695 * Dismiss the Keyboard Shortcuts screen. 1696 */ 1697 public final void dismissKeyboardShortcutsHelper() { 1698 Intent intent = new Intent(Intent.ACTION_DISMISS_KEYBOARD_SHORTCUTS); 1699 intent.setComponent(new ComponentName(KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME, 1700 KEYBOARD_SHORTCUTS_RECEIVER_CLASS_NAME)); 1701 sendBroadcast(intent); 1702 } 1703 1704 @Override 1705 public void onProvideKeyboardShortcuts( 1706 List<KeyboardShortcutGroup> data, Menu menu, int deviceId) { 1707 if (menu == null) { 1708 return; 1709 } 1710 KeyboardShortcutGroup group = null; 1711 int menuSize = menu.size(); 1712 for (int i = 0; i < menuSize; ++i) { 1713 final MenuItem item = menu.getItem(i); 1714 final CharSequence title = item.getTitle(); 1715 final char alphaShortcut = item.getAlphabeticShortcut(); 1716 if (title != null && alphaShortcut != MIN_VALUE) { 1717 if (group == null) { 1718 final int resource = mApplication.getApplicationInfo().labelRes; 1719 group = new KeyboardShortcutGroup(resource != 0 ? getString(resource) : null); 1720 } 1721 group.addItem(new KeyboardShortcutInfo( 1722 title, alphaShortcut, KeyEvent.META_CTRL_ON)); 1723 } 1724 } 1725 if (group != null) { 1726 data.add(group); 1727 } 1728 } 1729 1730 /** 1731 * Ask to have the current assistant shown to the user. This only works if the calling 1732 * activity is the current foreground activity. It is the same as calling 1733 * {@link android.service.voice.VoiceInteractionService#showSession 1734 * VoiceInteractionService.showSession} and requesting all of the possible context. 1735 * The receiver will always see 1736 * {@link android.service.voice.VoiceInteractionSession#SHOW_SOURCE_APPLICATION} set. 1737 * @return Returns true if the assistant was successfully invoked, else false. For example 1738 * false will be returned if the caller is not the current top activity. 1739 */ 1740 public boolean showAssist(Bundle args) { 1741 try { 1742 return ActivityManagerNative.getDefault().showAssistFromActivity(mToken, args); 1743 } catch (RemoteException e) { 1744 } 1745 return false; 1746 } 1747 1748 /** 1749 * Called when you are no longer visible to the user. You will next 1750 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1751 * depending on later user activity. 1752 * 1753 * <p>Note that this method may never be called, in low memory situations 1754 * where the system does not have enough memory to keep your activity's 1755 * process running after its {@link #onPause} method is called. 1756 * 1757 * <p><em>Derived classes must call through to the super class's 1758 * implementation of this method. If they do not, an exception will be 1759 * thrown.</em></p> 1760 * 1761 * @see #onRestart 1762 * @see #onResume 1763 * @see #onSaveInstanceState 1764 * @see #onDestroy 1765 */ 1766 @CallSuper 1767 protected void onStop() { 1768 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStop " + this); 1769 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1770 mActivityTransitionState.onStop(); 1771 getApplication().dispatchActivityStopped(this); 1772 mTranslucentCallback = null; 1773 mCalled = true; 1774 } 1775 1776 /** 1777 * Perform any final cleanup before an activity is destroyed. This can 1778 * happen either because the activity is finishing (someone called 1779 * {@link #finish} on it, or because the system is temporarily destroying 1780 * this instance of the activity to save space. You can distinguish 1781 * between these two scenarios with the {@link #isFinishing} method. 1782 * 1783 * <p><em>Note: do not count on this method being called as a place for 1784 * saving data! For example, if an activity is editing data in a content 1785 * provider, those edits should be committed in either {@link #onPause} or 1786 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1787 * free resources like threads that are associated with an activity, so 1788 * that a destroyed activity does not leave such things around while the 1789 * rest of its application is still running. There are situations where 1790 * the system will simply kill the activity's hosting process without 1791 * calling this method (or any others) in it, so it should not be used to 1792 * do things that are intended to remain around after the process goes 1793 * away. 1794 * 1795 * <p><em>Derived classes must call through to the super class's 1796 * implementation of this method. If they do not, an exception will be 1797 * thrown.</em></p> 1798 * 1799 * @see #onPause 1800 * @see #onStop 1801 * @see #finish 1802 * @see #isFinishing 1803 */ 1804 @CallSuper 1805 protected void onDestroy() { 1806 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onDestroy " + this); 1807 mCalled = true; 1808 1809 // dismiss any dialogs we are managing. 1810 if (mManagedDialogs != null) { 1811 final int numDialogs = mManagedDialogs.size(); 1812 for (int i = 0; i < numDialogs; i++) { 1813 final ManagedDialog md = mManagedDialogs.valueAt(i); 1814 if (md.mDialog.isShowing()) { 1815 md.mDialog.dismiss(); 1816 } 1817 } 1818 mManagedDialogs = null; 1819 } 1820 1821 // close any cursors we are managing. 1822 synchronized (mManagedCursors) { 1823 int numCursors = mManagedCursors.size(); 1824 for (int i = 0; i < numCursors; i++) { 1825 ManagedCursor c = mManagedCursors.get(i); 1826 if (c != null) { 1827 c.mCursor.close(); 1828 } 1829 } 1830 mManagedCursors.clear(); 1831 } 1832 1833 // Close any open search dialog 1834 if (mSearchManager != null) { 1835 mSearchManager.stopSearch(); 1836 } 1837 1838 if (mActionBar != null) { 1839 mActionBar.onDestroy(); 1840 } 1841 1842 getApplication().dispatchActivityDestroyed(this); 1843 } 1844 1845 /** 1846 * Report to the system that your app is now fully drawn, purely for diagnostic 1847 * purposes (calling it does not impact the visible behavior of the activity). 1848 * This is only used to help instrument application launch times, so that the 1849 * app can report when it is fully in a usable state; without this, the only thing 1850 * the system itself can determine is the point at which the activity's window 1851 * is <em>first</em> drawn and displayed. To participate in app launch time 1852 * measurement, you should always call this method after first launch (when 1853 * {@link #onCreate(android.os.Bundle)} is called), at the point where you have 1854 * entirely drawn your UI and populated with all of the significant data. You 1855 * can safely call this method any time after first launch as well, in which case 1856 * it will simply be ignored. 1857 */ 1858 public void reportFullyDrawn() { 1859 if (mDoReportFullyDrawn) { 1860 mDoReportFullyDrawn = false; 1861 try { 1862 ActivityManagerNative.getDefault().reportActivityFullyDrawn(mToken); 1863 } catch (RemoteException e) { 1864 } 1865 } 1866 } 1867 1868 /** 1869 * Called by the system when the activity changes from fullscreen mode to multi-window mode and 1870 * visa-versa. 1871 * @see android.R.attr#resizeableActivity 1872 * 1873 * @param isInMultiWindowMode True if the activity is in multi-window mode. 1874 */ 1875 @CallSuper 1876 public void onMultiWindowModeChanged(boolean isInMultiWindowMode) { 1877 if (DEBUG_LIFECYCLE) Slog.v(TAG, 1878 "onMultiWindowModeChanged " + this + ": " + isInMultiWindowMode); 1879 mFragments.dispatchMultiWindowModeChanged(isInMultiWindowMode); 1880 if (mWindow != null) { 1881 mWindow.onMultiWindowModeChanged(); 1882 } 1883 } 1884 1885 /** 1886 * Returns true if the activity is currently in multi-window mode. 1887 * @see android.R.attr#resizeableActivity 1888 * 1889 * @return True if the activity is in multi-window mode. 1890 */ 1891 public boolean isInMultiWindowMode() { 1892 try { 1893 return ActivityManagerNative.getDefault().isInMultiWindowMode(mToken); 1894 } catch (RemoteException e) { 1895 } 1896 return false; 1897 } 1898 1899 /** 1900 * Called by the system when the activity changes to and from picture-in-picture mode. 1901 * @see android.R.attr#supportsPictureInPicture 1902 * 1903 * @param isInPictureInPictureMode True if the activity is in picture-in-picture mode. 1904 */ 1905 @CallSuper 1906 public void onPictureInPictureModeChanged(boolean isInPictureInPictureMode) { 1907 if (DEBUG_LIFECYCLE) Slog.v(TAG, 1908 "onPictureInPictureModeChanged " + this + ": " + isInPictureInPictureMode); 1909 mFragments.dispatchPictureInPictureModeChanged(isInPictureInPictureMode); 1910 } 1911 1912 /** 1913 * Returns true if the activity is currently in picture-in-picture mode. 1914 * @see android.R.attr#supportsPictureInPicture 1915 * 1916 * @return True if the activity is in picture-in-picture mode. 1917 */ 1918 public boolean isInPictureInPictureMode() { 1919 try { 1920 return ActivityManagerNative.getDefault().isInPictureInPictureMode(mToken); 1921 } catch (RemoteException e) { 1922 } 1923 return false; 1924 } 1925 1926 /** 1927 * Puts the activity in picture-in-picture mode. 1928 * @see android.R.attr#supportsPictureInPicture 1929 */ 1930 public void enterPictureInPictureMode() { 1931 try { 1932 ActivityManagerNative.getDefault().enterPictureInPictureMode(mToken); 1933 } catch (RemoteException e) { 1934 } 1935 } 1936 1937 /** 1938 * Called by the system when the device configuration changes while your 1939 * activity is running. Note that this will <em>only</em> be called if 1940 * you have selected configurations you would like to handle with the 1941 * {@link android.R.attr#configChanges} attribute in your manifest. If 1942 * any configuration change occurs that is not selected to be reported 1943 * by that attribute, then instead of reporting it the system will stop 1944 * and restart the activity (to have it launched with the new 1945 * configuration). 1946 * 1947 * <p>At the time that this function has been called, your Resources 1948 * object will have been updated to return resource values matching the 1949 * new configuration. 1950 * 1951 * @param newConfig The new device configuration. 1952 */ 1953 public void onConfigurationChanged(Configuration newConfig) { 1954 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig); 1955 mCalled = true; 1956 1957 mFragments.dispatchConfigurationChanged(newConfig); 1958 1959 if (mWindow != null) { 1960 // Pass the configuration changed event to the window 1961 mWindow.onConfigurationChanged(newConfig); 1962 } 1963 1964 if (mActionBar != null) { 1965 // Do this last; the action bar will need to access 1966 // view changes from above. 1967 mActionBar.onConfigurationChanged(newConfig); 1968 } 1969 } 1970 1971 /** 1972 * If this activity is being destroyed because it can not handle a 1973 * configuration parameter being changed (and thus its 1974 * {@link #onConfigurationChanged(Configuration)} method is 1975 * <em>not</em> being called), then you can use this method to discover 1976 * the set of changes that have occurred while in the process of being 1977 * destroyed. Note that there is no guarantee that these will be 1978 * accurate (other changes could have happened at any time), so you should 1979 * only use this as an optimization hint. 1980 * 1981 * @return Returns a bit field of the configuration parameters that are 1982 * changing, as defined by the {@link android.content.res.Configuration} 1983 * class. 1984 */ 1985 public int getChangingConfigurations() { 1986 return mConfigChangeFlags; 1987 } 1988 1989 /** 1990 * Retrieve the non-configuration instance data that was previously 1991 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1992 * be available from the initial {@link #onCreate} and 1993 * {@link #onStart} calls to the new instance, allowing you to extract 1994 * any useful dynamic state from the previous instance. 1995 * 1996 * <p>Note that the data you retrieve here should <em>only</em> be used 1997 * as an optimization for handling configuration changes. You should always 1998 * be able to handle getting a null pointer back, and an activity must 1999 * still be able to restore itself to its previous state (through the 2000 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 2001 * function returns null. 2002 * 2003 * <p><strong>Note:</strong> For most cases you should use the {@link Fragment} API 2004 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 2005 * available on older platforms through the Android support libraries. 2006 * 2007 * @return the object previously returned by {@link #onRetainNonConfigurationInstance()} 2008 */ 2009 @Nullable 2010 public Object getLastNonConfigurationInstance() { 2011 return mLastNonConfigurationInstances != null 2012 ? mLastNonConfigurationInstances.activity : null; 2013 } 2014 2015 /** 2016 * Called by the system, as part of destroying an 2017 * activity due to a configuration change, when it is known that a new 2018 * instance will immediately be created for the new configuration. You 2019 * can return any object you like here, including the activity instance 2020 * itself, which can later be retrieved by calling 2021 * {@link #getLastNonConfigurationInstance()} in the new activity 2022 * instance. 2023 * 2024 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2025 * or later, consider instead using a {@link Fragment} with 2026 * {@link Fragment#setRetainInstance(boolean) 2027 * Fragment.setRetainInstance(boolean}.</em> 2028 * 2029 * <p>This function is called purely as an optimization, and you must 2030 * not rely on it being called. When it is called, a number of guarantees 2031 * will be made to help optimize configuration switching: 2032 * <ul> 2033 * <li> The function will be called between {@link #onStop} and 2034 * {@link #onDestroy}. 2035 * <li> A new instance of the activity will <em>always</em> be immediately 2036 * created after this one's {@link #onDestroy()} is called. In particular, 2037 * <em>no</em> messages will be dispatched during this time (when the returned 2038 * object does not have an activity to be associated with). 2039 * <li> The object you return here will <em>always</em> be available from 2040 * the {@link #getLastNonConfigurationInstance()} method of the following 2041 * activity instance as described there. 2042 * </ul> 2043 * 2044 * <p>These guarantees are designed so that an activity can use this API 2045 * to propagate extensive state from the old to new activity instance, from 2046 * loaded bitmaps, to network connections, to evenly actively running 2047 * threads. Note that you should <em>not</em> propagate any data that 2048 * may change based on the configuration, including any data loaded from 2049 * resources such as strings, layouts, or drawables. 2050 * 2051 * <p>The guarantee of no message handling during the switch to the next 2052 * activity simplifies use with active objects. For example if your retained 2053 * state is an {@link android.os.AsyncTask} you are guaranteed that its 2054 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 2055 * not be called from the call here until you execute the next instance's 2056 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 2057 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 2058 * running in a separate thread.) 2059 * 2060 * <p><strong>Note:</strong> For most cases you should use the {@link Fragment} API 2061 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 2062 * available on older platforms through the Android support libraries. 2063 * 2064 * @return any Object holding the desired state to propagate to the 2065 * next activity instance 2066 */ 2067 public Object onRetainNonConfigurationInstance() { 2068 return null; 2069 } 2070 2071 /** 2072 * Retrieve the non-configuration instance data that was previously 2073 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 2074 * be available from the initial {@link #onCreate} and 2075 * {@link #onStart} calls to the new instance, allowing you to extract 2076 * any useful dynamic state from the previous instance. 2077 * 2078 * <p>Note that the data you retrieve here should <em>only</em> be used 2079 * as an optimization for handling configuration changes. You should always 2080 * be able to handle getting a null pointer back, and an activity must 2081 * still be able to restore itself to its previous state (through the 2082 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 2083 * function returns null. 2084 * 2085 * @return Returns the object previously returned by 2086 * {@link #onRetainNonConfigurationChildInstances()} 2087 */ 2088 @Nullable 2089 HashMap<String, Object> getLastNonConfigurationChildInstances() { 2090 return mLastNonConfigurationInstances != null 2091 ? mLastNonConfigurationInstances.children : null; 2092 } 2093 2094 /** 2095 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 2096 * it should return either a mapping from child activity id strings to arbitrary objects, 2097 * or null. This method is intended to be used by Activity framework subclasses that control a 2098 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 2099 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 2100 */ 2101 @Nullable 2102 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 2103 return null; 2104 } 2105 2106 NonConfigurationInstances retainNonConfigurationInstances() { 2107 Object activity = onRetainNonConfigurationInstance(); 2108 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 2109 FragmentManagerNonConfig fragments = mFragments.retainNestedNonConfig(); 2110 2111 // We're already stopped but we've been asked to retain. 2112 // Our fragments are taken care of but we need to mark the loaders for retention. 2113 // In order to do this correctly we need to restart the loaders first before 2114 // handing them off to the next activity. 2115 mFragments.doLoaderStart(); 2116 mFragments.doLoaderStop(true); 2117 ArrayMap<String, LoaderManager> loaders = mFragments.retainLoaderNonConfig(); 2118 2119 if (activity == null && children == null && fragments == null && loaders == null 2120 && mVoiceInteractor == null) { 2121 return null; 2122 } 2123 2124 NonConfigurationInstances nci = new NonConfigurationInstances(); 2125 nci.activity = activity; 2126 nci.children = children; 2127 nci.fragments = fragments; 2128 nci.loaders = loaders; 2129 if (mVoiceInteractor != null) { 2130 mVoiceInteractor.retainInstance(); 2131 nci.voiceInteractor = mVoiceInteractor; 2132 } 2133 return nci; 2134 } 2135 2136 public void onLowMemory() { 2137 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onLowMemory " + this); 2138 mCalled = true; 2139 mFragments.dispatchLowMemory(); 2140 } 2141 2142 public void onTrimMemory(int level) { 2143 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onTrimMemory " + this + ": " + level); 2144 mCalled = true; 2145 mFragments.dispatchTrimMemory(level); 2146 } 2147 2148 /** 2149 * Return the FragmentManager for interacting with fragments associated 2150 * with this activity. 2151 */ 2152 public FragmentManager getFragmentManager() { 2153 return mFragments.getFragmentManager(); 2154 } 2155 2156 /** 2157 * Called when a Fragment is being attached to this activity, immediately 2158 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 2159 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 2160 */ 2161 public void onAttachFragment(Fragment fragment) { 2162 } 2163 2164 /** 2165 * Wrapper around 2166 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 2167 * that gives the resulting {@link Cursor} to call 2168 * {@link #startManagingCursor} so that the activity will manage its 2169 * lifecycle for you. 2170 * 2171 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2172 * or later, consider instead using {@link LoaderManager} instead, available 2173 * via {@link #getLoaderManager()}.</em> 2174 * 2175 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 2176 * this method, because the activity will do that for you at the appropriate time. However, if 2177 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 2178 * not</em> automatically close the cursor and, in that case, you must call 2179 * {@link Cursor#close()}.</p> 2180 * 2181 * @param uri The URI of the content provider to query. 2182 * @param projection List of columns to return. 2183 * @param selection SQL WHERE clause. 2184 * @param sortOrder SQL ORDER BY clause. 2185 * 2186 * @return The Cursor that was returned by query(). 2187 * 2188 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 2189 * @see #startManagingCursor 2190 * @hide 2191 * 2192 * @deprecated Use {@link CursorLoader} instead. 2193 */ 2194 @Deprecated 2195 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 2196 String sortOrder) { 2197 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 2198 if (c != null) { 2199 startManagingCursor(c); 2200 } 2201 return c; 2202 } 2203 2204 /** 2205 * Wrapper around 2206 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 2207 * that gives the resulting {@link Cursor} to call 2208 * {@link #startManagingCursor} so that the activity will manage its 2209 * lifecycle for you. 2210 * 2211 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2212 * or later, consider instead using {@link LoaderManager} instead, available 2213 * via {@link #getLoaderManager()}.</em> 2214 * 2215 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 2216 * this method, because the activity will do that for you at the appropriate time. However, if 2217 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 2218 * not</em> automatically close the cursor and, in that case, you must call 2219 * {@link Cursor#close()}.</p> 2220 * 2221 * @param uri The URI of the content provider to query. 2222 * @param projection List of columns to return. 2223 * @param selection SQL WHERE clause. 2224 * @param selectionArgs The arguments to selection, if any ?s are pesent 2225 * @param sortOrder SQL ORDER BY clause. 2226 * 2227 * @return The Cursor that was returned by query(). 2228 * 2229 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 2230 * @see #startManagingCursor 2231 * 2232 * @deprecated Use {@link CursorLoader} instead. 2233 */ 2234 @Deprecated 2235 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 2236 String[] selectionArgs, String sortOrder) { 2237 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 2238 if (c != null) { 2239 startManagingCursor(c); 2240 } 2241 return c; 2242 } 2243 2244 /** 2245 * This method allows the activity to take care of managing the given 2246 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 2247 * That is, when the activity is stopped it will automatically call 2248 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 2249 * it will call {@link Cursor#requery} for you. When the activity is 2250 * destroyed, all managed Cursors will be closed automatically. 2251 * 2252 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2253 * or later, consider instead using {@link LoaderManager} instead, available 2254 * via {@link #getLoaderManager()}.</em> 2255 * 2256 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 2257 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 2258 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 2259 * <em>will not</em> automatically close the cursor and, in that case, you must call 2260 * {@link Cursor#close()}.</p> 2261 * 2262 * @param c The Cursor to be managed. 2263 * 2264 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 2265 * @see #stopManagingCursor 2266 * 2267 * @deprecated Use the new {@link android.content.CursorLoader} class with 2268 * {@link LoaderManager} instead; this is also 2269 * available on older platforms through the Android compatibility package. 2270 */ 2271 @Deprecated 2272 public void startManagingCursor(Cursor c) { 2273 synchronized (mManagedCursors) { 2274 mManagedCursors.add(new ManagedCursor(c)); 2275 } 2276 } 2277 2278 /** 2279 * Given a Cursor that was previously given to 2280 * {@link #startManagingCursor}, stop the activity's management of that 2281 * cursor. 2282 * 2283 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 2284 * the system <em>will not</em> automatically close the cursor and you must call 2285 * {@link Cursor#close()}.</p> 2286 * 2287 * @param c The Cursor that was being managed. 2288 * 2289 * @see #startManagingCursor 2290 * 2291 * @deprecated Use the new {@link android.content.CursorLoader} class with 2292 * {@link LoaderManager} instead; this is also 2293 * available on older platforms through the Android compatibility package. 2294 */ 2295 @Deprecated 2296 public void stopManagingCursor(Cursor c) { 2297 synchronized (mManagedCursors) { 2298 final int N = mManagedCursors.size(); 2299 for (int i=0; i<N; i++) { 2300 ManagedCursor mc = mManagedCursors.get(i); 2301 if (mc.mCursor == c) { 2302 mManagedCursors.remove(i); 2303 break; 2304 } 2305 } 2306 } 2307 } 2308 2309 /** 2310 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 2311 * this is a no-op. 2312 * @hide 2313 */ 2314 @Deprecated 2315 public void setPersistent(boolean isPersistent) { 2316 } 2317 2318 /** 2319 * Finds a view that was identified by the id attribute from the XML that 2320 * was processed in {@link #onCreate}. 2321 * 2322 * @return The view if found or null otherwise. 2323 */ 2324 @Nullable 2325 public View findViewById(@IdRes int id) { 2326 return getWindow().findViewById(id); 2327 } 2328 2329 /** 2330 * Retrieve a reference to this activity's ActionBar. 2331 * 2332 * @return The Activity's ActionBar, or null if it does not have one. 2333 */ 2334 @Nullable 2335 public ActionBar getActionBar() { 2336 initWindowDecorActionBar(); 2337 return mActionBar; 2338 } 2339 2340 /** 2341 * Set a {@link android.widget.Toolbar Toolbar} to act as the {@link ActionBar} for this 2342 * Activity window. 2343 * 2344 * <p>When set to a non-null value the {@link #getActionBar()} method will return 2345 * an {@link ActionBar} object that can be used to control the given toolbar as if it were 2346 * a traditional window decor action bar. The toolbar's menu will be populated with the 2347 * Activity's options menu and the navigation button will be wired through the standard 2348 * {@link android.R.id#home home} menu select action.</p> 2349 * 2350 * <p>In order to use a Toolbar within the Activity's window content the application 2351 * must not request the window feature {@link Window#FEATURE_ACTION_BAR FEATURE_ACTION_BAR}.</p> 2352 * 2353 * @param toolbar Toolbar to set as the Activity's action bar, or {@code null} to clear it 2354 */ 2355 public void setActionBar(@Nullable Toolbar toolbar) { 2356 final ActionBar ab = getActionBar(); 2357 if (ab instanceof WindowDecorActionBar) { 2358 throw new IllegalStateException("This Activity already has an action bar supplied " + 2359 "by the window decor. Do not request Window.FEATURE_ACTION_BAR and set " + 2360 "android:windowActionBar to false in your theme to use a Toolbar instead."); 2361 } 2362 2363 // If we reach here then we're setting a new action bar 2364 // First clear out the MenuInflater to make sure that it is valid for the new Action Bar 2365 mMenuInflater = null; 2366 2367 // If we have an action bar currently, destroy it 2368 if (ab != null) { 2369 ab.onDestroy(); 2370 } 2371 2372 if (toolbar != null) { 2373 final ToolbarActionBar tbab = new ToolbarActionBar(toolbar, getTitle(), this); 2374 mActionBar = tbab; 2375 mWindow.setCallback(tbab.getWrappedWindowCallback()); 2376 } else { 2377 mActionBar = null; 2378 // Re-set the original window callback since we may have already set a Toolbar wrapper 2379 mWindow.setCallback(this); 2380 } 2381 2382 invalidateOptionsMenu(); 2383 } 2384 2385 /** 2386 * Creates a new ActionBar, locates the inflated ActionBarView, 2387 * initializes the ActionBar with the view, and sets mActionBar. 2388 */ 2389 private void initWindowDecorActionBar() { 2390 Window window = getWindow(); 2391 2392 // Initializing the window decor can change window feature flags. 2393 // Make sure that we have the correct set before performing the test below. 2394 window.getDecorView(); 2395 2396 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 2397 return; 2398 } 2399 2400 mActionBar = new WindowDecorActionBar(this); 2401 mActionBar.setDefaultDisplayHomeAsUpEnabled(mEnableDefaultActionBarUp); 2402 2403 mWindow.setDefaultIcon(mActivityInfo.getIconResource()); 2404 mWindow.setDefaultLogo(mActivityInfo.getLogoResource()); 2405 } 2406 2407 /** 2408 * Set the activity content from a layout resource. The resource will be 2409 * inflated, adding all top-level views to the activity. 2410 * 2411 * @param layoutResID Resource ID to be inflated. 2412 * 2413 * @see #setContentView(android.view.View) 2414 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2415 */ 2416 public void setContentView(@LayoutRes int layoutResID) { 2417 getWindow().setContentView(layoutResID); 2418 initWindowDecorActionBar(); 2419 } 2420 2421 /** 2422 * Set the activity content to an explicit view. This view is placed 2423 * directly into the activity's view hierarchy. It can itself be a complex 2424 * view hierarchy. When calling this method, the layout parameters of the 2425 * specified view are ignored. Both the width and the height of the view are 2426 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 2427 * your own layout parameters, invoke 2428 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 2429 * instead. 2430 * 2431 * @param view The desired content to display. 2432 * 2433 * @see #setContentView(int) 2434 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2435 */ 2436 public void setContentView(View view) { 2437 getWindow().setContentView(view); 2438 initWindowDecorActionBar(); 2439 } 2440 2441 /** 2442 * Set the activity content to an explicit view. This view is placed 2443 * directly into the activity's view hierarchy. It can itself be a complex 2444 * view hierarchy. 2445 * 2446 * @param view The desired content to display. 2447 * @param params Layout parameters for the view. 2448 * 2449 * @see #setContentView(android.view.View) 2450 * @see #setContentView(int) 2451 */ 2452 public void setContentView(View view, ViewGroup.LayoutParams params) { 2453 getWindow().setContentView(view, params); 2454 initWindowDecorActionBar(); 2455 } 2456 2457 /** 2458 * Add an additional content view to the activity. Added after any existing 2459 * ones in the activity -- existing views are NOT removed. 2460 * 2461 * @param view The desired content to display. 2462 * @param params Layout parameters for the view. 2463 */ 2464 public void addContentView(View view, ViewGroup.LayoutParams params) { 2465 getWindow().addContentView(view, params); 2466 initWindowDecorActionBar(); 2467 } 2468 2469 /** 2470 * Retrieve the {@link TransitionManager} responsible for default transitions in this window. 2471 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2472 * 2473 * <p>This method will return non-null after content has been initialized (e.g. by using 2474 * {@link #setContentView}) if {@link Window#FEATURE_CONTENT_TRANSITIONS} has been granted.</p> 2475 * 2476 * @return This window's content TransitionManager or null if none is set. 2477 */ 2478 public TransitionManager getContentTransitionManager() { 2479 return getWindow().getTransitionManager(); 2480 } 2481 2482 /** 2483 * Set the {@link TransitionManager} to use for default transitions in this window. 2484 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2485 * 2486 * @param tm The TransitionManager to use for scene changes. 2487 */ 2488 public void setContentTransitionManager(TransitionManager tm) { 2489 getWindow().setTransitionManager(tm); 2490 } 2491 2492 /** 2493 * Retrieve the {@link Scene} representing this window's current content. 2494 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2495 * 2496 * <p>This method will return null if the current content is not represented by a Scene.</p> 2497 * 2498 * @return Current Scene being shown or null 2499 */ 2500 public Scene getContentScene() { 2501 return getWindow().getContentScene(); 2502 } 2503 2504 /** 2505 * Sets whether this activity is finished when touched outside its window's 2506 * bounds. 2507 */ 2508 public void setFinishOnTouchOutside(boolean finish) { 2509 mWindow.setCloseOnTouchOutside(finish); 2510 } 2511 2512 /** @hide */ 2513 @IntDef({ 2514 DEFAULT_KEYS_DISABLE, 2515 DEFAULT_KEYS_DIALER, 2516 DEFAULT_KEYS_SHORTCUT, 2517 DEFAULT_KEYS_SEARCH_LOCAL, 2518 DEFAULT_KEYS_SEARCH_GLOBAL}) 2519 @Retention(RetentionPolicy.SOURCE) 2520 @interface DefaultKeyMode {} 2521 2522 /** 2523 * Use with {@link #setDefaultKeyMode} to turn off default handling of 2524 * keys. 2525 * 2526 * @see #setDefaultKeyMode 2527 */ 2528 static public final int DEFAULT_KEYS_DISABLE = 0; 2529 /** 2530 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 2531 * key handling. 2532 * 2533 * @see #setDefaultKeyMode 2534 */ 2535 static public final int DEFAULT_KEYS_DIALER = 1; 2536 /** 2537 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 2538 * default key handling. 2539 * 2540 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 2541 * 2542 * @see #setDefaultKeyMode 2543 */ 2544 static public final int DEFAULT_KEYS_SHORTCUT = 2; 2545 /** 2546 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2547 * will start an application-defined search. (If the application or activity does not 2548 * actually define a search, the the keys will be ignored.) 2549 * 2550 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2551 * 2552 * @see #setDefaultKeyMode 2553 */ 2554 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 2555 2556 /** 2557 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2558 * will start a global search (typically web search, but some platforms may define alternate 2559 * methods for global search) 2560 * 2561 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2562 * 2563 * @see #setDefaultKeyMode 2564 */ 2565 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 2566 2567 /** 2568 * Select the default key handling for this activity. This controls what 2569 * will happen to key events that are not otherwise handled. The default 2570 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 2571 * floor. Other modes allow you to launch the dialer 2572 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 2573 * menu without requiring the menu key be held down 2574 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 2575 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 2576 * 2577 * <p>Note that the mode selected here does not impact the default 2578 * handling of system keys, such as the "back" and "menu" keys, and your 2579 * activity and its views always get a first chance to receive and handle 2580 * all application keys. 2581 * 2582 * @param mode The desired default key mode constant. 2583 * 2584 * @see #DEFAULT_KEYS_DISABLE 2585 * @see #DEFAULT_KEYS_DIALER 2586 * @see #DEFAULT_KEYS_SHORTCUT 2587 * @see #DEFAULT_KEYS_SEARCH_LOCAL 2588 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 2589 * @see #onKeyDown 2590 */ 2591 public final void setDefaultKeyMode(@DefaultKeyMode int mode) { 2592 mDefaultKeyMode = mode; 2593 2594 // Some modes use a SpannableStringBuilder to track & dispatch input events 2595 // This list must remain in sync with the switch in onKeyDown() 2596 switch (mode) { 2597 case DEFAULT_KEYS_DISABLE: 2598 case DEFAULT_KEYS_SHORTCUT: 2599 mDefaultKeySsb = null; // not used in these modes 2600 break; 2601 case DEFAULT_KEYS_DIALER: 2602 case DEFAULT_KEYS_SEARCH_LOCAL: 2603 case DEFAULT_KEYS_SEARCH_GLOBAL: 2604 mDefaultKeySsb = new SpannableStringBuilder(); 2605 Selection.setSelection(mDefaultKeySsb,0); 2606 break; 2607 default: 2608 throw new IllegalArgumentException(); 2609 } 2610 } 2611 2612 /** 2613 * Called when a key was pressed down and not handled by any of the views 2614 * inside of the activity. So, for example, key presses while the cursor 2615 * is inside a TextView will not trigger the event (unless it is a navigation 2616 * to another object) because TextView handles its own key presses. 2617 * 2618 * <p>If the focused view didn't want this event, this method is called. 2619 * 2620 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2621 * by calling {@link #onBackPressed()}, though the behavior varies based 2622 * on the application compatibility mode: for 2623 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2624 * it will set up the dispatch to call {@link #onKeyUp} where the action 2625 * will be performed; for earlier applications, it will perform the 2626 * action immediately in on-down, as those versions of the platform 2627 * behaved. 2628 * 2629 * <p>Other additional default key handling may be performed 2630 * if configured with {@link #setDefaultKeyMode}. 2631 * 2632 * @return Return <code>true</code> to prevent this event from being propagated 2633 * further, or <code>false</code> to indicate that you have not handled 2634 * this event and it should continue to be propagated. 2635 * @see #onKeyUp 2636 * @see android.view.KeyEvent 2637 */ 2638 public boolean onKeyDown(int keyCode, KeyEvent event) { 2639 if (keyCode == KeyEvent.KEYCODE_BACK) { 2640 if (getApplicationInfo().targetSdkVersion 2641 >= Build.VERSION_CODES.ECLAIR) { 2642 event.startTracking(); 2643 } else { 2644 onBackPressed(); 2645 } 2646 return true; 2647 } 2648 2649 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2650 return false; 2651 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2652 Window w = getWindow(); 2653 if (w.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 2654 w.performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, keyCode, event, 2655 Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2656 return true; 2657 } 2658 return false; 2659 } else { 2660 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2661 boolean clearSpannable = false; 2662 boolean handled; 2663 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2664 clearSpannable = true; 2665 handled = false; 2666 } else { 2667 handled = TextKeyListener.getInstance().onKeyDown( 2668 null, mDefaultKeySsb, keyCode, event); 2669 if (handled && mDefaultKeySsb.length() > 0) { 2670 // something useable has been typed - dispatch it now. 2671 2672 final String str = mDefaultKeySsb.toString(); 2673 clearSpannable = true; 2674 2675 switch (mDefaultKeyMode) { 2676 case DEFAULT_KEYS_DIALER: 2677 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2678 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2679 startActivity(intent); 2680 break; 2681 case DEFAULT_KEYS_SEARCH_LOCAL: 2682 startSearch(str, false, null, false); 2683 break; 2684 case DEFAULT_KEYS_SEARCH_GLOBAL: 2685 startSearch(str, false, null, true); 2686 break; 2687 } 2688 } 2689 } 2690 if (clearSpannable) { 2691 mDefaultKeySsb.clear(); 2692 mDefaultKeySsb.clearSpans(); 2693 Selection.setSelection(mDefaultKeySsb,0); 2694 } 2695 return handled; 2696 } 2697 } 2698 2699 /** 2700 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2701 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2702 * the event). 2703 */ 2704 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2705 return false; 2706 } 2707 2708 /** 2709 * Called when a key was released and not handled by any of the views 2710 * inside of the activity. So, for example, key presses while the cursor 2711 * is inside a TextView will not trigger the event (unless it is a navigation 2712 * to another object) because TextView handles its own key presses. 2713 * 2714 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2715 * and go back. 2716 * 2717 * @return Return <code>true</code> to prevent this event from being propagated 2718 * further, or <code>false</code> to indicate that you have not handled 2719 * this event and it should continue to be propagated. 2720 * @see #onKeyDown 2721 * @see KeyEvent 2722 */ 2723 public boolean onKeyUp(int keyCode, KeyEvent event) { 2724 if (getApplicationInfo().targetSdkVersion 2725 >= Build.VERSION_CODES.ECLAIR) { 2726 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2727 && !event.isCanceled()) { 2728 onBackPressed(); 2729 return true; 2730 } 2731 } 2732 return false; 2733 } 2734 2735 /** 2736 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2737 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2738 * the event). 2739 */ 2740 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2741 return false; 2742 } 2743 2744 /** 2745 * Called when the activity has detected the user's press of the back 2746 * key. The default implementation simply finishes the current activity, 2747 * but you can override this to do whatever you want. 2748 */ 2749 public void onBackPressed() { 2750 if (mActionBar != null && mActionBar.collapseActionView()) { 2751 return; 2752 } 2753 2754 if (!mFragments.getFragmentManager().popBackStackImmediate()) { 2755 finishAfterTransition(); 2756 } 2757 } 2758 2759 /** 2760 * Called when a key shortcut event is not handled by any of the views in the Activity. 2761 * Override this method to implement global key shortcuts for the Activity. 2762 * Key shortcuts can also be implemented by setting the 2763 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2764 * 2765 * @param keyCode The value in event.getKeyCode(). 2766 * @param event Description of the key event. 2767 * @return True if the key shortcut was handled. 2768 */ 2769 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2770 // Let the Action Bar have a chance at handling the shortcut. 2771 ActionBar actionBar = getActionBar(); 2772 return (actionBar != null && actionBar.onKeyShortcut(keyCode, event)); 2773 } 2774 2775 /** 2776 * Called when a touch screen event was not handled by any of the views 2777 * under it. This is most useful to process touch events that happen 2778 * outside of your window bounds, where there is no view to receive it. 2779 * 2780 * @param event The touch screen event being processed. 2781 * 2782 * @return Return true if you have consumed the event, false if you haven't. 2783 * The default implementation always returns false. 2784 */ 2785 public boolean onTouchEvent(MotionEvent event) { 2786 if (mWindow.shouldCloseOnTouch(this, event)) { 2787 finish(); 2788 return true; 2789 } 2790 2791 return false; 2792 } 2793 2794 /** 2795 * Called when the trackball was moved and not handled by any of the 2796 * views inside of the activity. So, for example, if the trackball moves 2797 * while focus is on a button, you will receive a call here because 2798 * buttons do not normally do anything with trackball events. The call 2799 * here happens <em>before</em> trackball movements are converted to 2800 * DPAD key events, which then get sent back to the view hierarchy, and 2801 * will be processed at the point for things like focus navigation. 2802 * 2803 * @param event The trackball event being processed. 2804 * 2805 * @return Return true if you have consumed the event, false if you haven't. 2806 * The default implementation always returns false. 2807 */ 2808 public boolean onTrackballEvent(MotionEvent event) { 2809 return false; 2810 } 2811 2812 /** 2813 * Called when a generic motion event was not handled by any of the 2814 * views inside of the activity. 2815 * <p> 2816 * Generic motion events describe joystick movements, mouse hovers, track pad 2817 * touches, scroll wheel movements and other input events. The 2818 * {@link MotionEvent#getSource() source} of the motion event specifies 2819 * the class of input that was received. Implementations of this method 2820 * must examine the bits in the source before processing the event. 2821 * The following code example shows how this is done. 2822 * </p><p> 2823 * Generic motion events with source class 2824 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2825 * are delivered to the view under the pointer. All other generic motion events are 2826 * delivered to the focused view. 2827 * </p><p> 2828 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2829 * handle this event. 2830 * </p> 2831 * 2832 * @param event The generic motion event being processed. 2833 * 2834 * @return Return true if you have consumed the event, false if you haven't. 2835 * The default implementation always returns false. 2836 */ 2837 public boolean onGenericMotionEvent(MotionEvent event) { 2838 return false; 2839 } 2840 2841 /** 2842 * Called whenever a key, touch, or trackball event is dispatched to the 2843 * activity. Implement this method if you wish to know that the user has 2844 * interacted with the device in some way while your activity is running. 2845 * This callback and {@link #onUserLeaveHint} are intended to help 2846 * activities manage status bar notifications intelligently; specifically, 2847 * for helping activities determine the proper time to cancel a notfication. 2848 * 2849 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2850 * be accompanied by calls to {@link #onUserInteraction}. This 2851 * ensures that your activity will be told of relevant user activity such 2852 * as pulling down the notification pane and touching an item there. 2853 * 2854 * <p>Note that this callback will be invoked for the touch down action 2855 * that begins a touch gesture, but may not be invoked for the touch-moved 2856 * and touch-up actions that follow. 2857 * 2858 * @see #onUserLeaveHint() 2859 */ 2860 public void onUserInteraction() { 2861 } 2862 2863 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2864 // Update window manager if: we have a view, that view is 2865 // attached to its parent (which will be a RootView), and 2866 // this activity is not embedded. 2867 if (mParent == null) { 2868 View decor = mDecor; 2869 if (decor != null && decor.getParent() != null) { 2870 getWindowManager().updateViewLayout(decor, params); 2871 } 2872 } 2873 } 2874 2875 public void onContentChanged() { 2876 } 2877 2878 /** 2879 * Called when the current {@link Window} of the activity gains or loses 2880 * focus. This is the best indicator of whether this activity is visible 2881 * to the user. The default implementation clears the key tracking 2882 * state, so should always be called. 2883 * 2884 * <p>Note that this provides information about global focus state, which 2885 * is managed independently of activity lifecycles. As such, while focus 2886 * changes will generally have some relation to lifecycle changes (an 2887 * activity that is stopped will not generally get window focus), you 2888 * should not rely on any particular order between the callbacks here and 2889 * those in the other lifecycle methods such as {@link #onResume}. 2890 * 2891 * <p>As a general rule, however, a resumed activity will have window 2892 * focus... unless it has displayed other dialogs or popups that take 2893 * input focus, in which case the activity itself will not have focus 2894 * when the other windows have it. Likewise, the system may display 2895 * system-level windows (such as the status bar notification panel or 2896 * a system alert) which will temporarily take window input focus without 2897 * pausing the foreground activity. 2898 * 2899 * @param hasFocus Whether the window of this activity has focus. 2900 * 2901 * @see #hasWindowFocus() 2902 * @see #onResume 2903 * @see View#onWindowFocusChanged(boolean) 2904 */ 2905 public void onWindowFocusChanged(boolean hasFocus) { 2906 } 2907 2908 /** 2909 * Called when the main window associated with the activity has been 2910 * attached to the window manager. 2911 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2912 * for more information. 2913 * @see View#onAttachedToWindow 2914 */ 2915 public void onAttachedToWindow() { 2916 } 2917 2918 /** 2919 * Called when the main window associated with the activity has been 2920 * detached from the window manager. 2921 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2922 * for more information. 2923 * @see View#onDetachedFromWindow 2924 */ 2925 public void onDetachedFromWindow() { 2926 } 2927 2928 /** 2929 * Returns true if this activity's <em>main</em> window currently has window focus. 2930 * Note that this is not the same as the view itself having focus. 2931 * 2932 * @return True if this activity's main window currently has window focus. 2933 * 2934 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2935 */ 2936 public boolean hasWindowFocus() { 2937 Window w = getWindow(); 2938 if (w != null) { 2939 View d = w.getDecorView(); 2940 if (d != null) { 2941 return d.hasWindowFocus(); 2942 } 2943 } 2944 return false; 2945 } 2946 2947 /** 2948 * Called when the main window associated with the activity has been dismissed. 2949 * @hide 2950 */ 2951 @Override 2952 public void onWindowDismissed(boolean finishTask) { 2953 finish(finishTask ? FINISH_TASK_WITH_ACTIVITY : DONT_FINISH_TASK_WITH_ACTIVITY); 2954 } 2955 2956 2957 /** 2958 * Moves the activity from 2959 * {@link android.app.ActivityManager.StackId#FREEFORM_WORKSPACE_STACK_ID} to 2960 * {@link android.app.ActivityManager.StackId#FULLSCREEN_WORKSPACE_STACK_ID} stack. 2961 * 2962 * @hide 2963 */ 2964 @Override 2965 public void exitFreeformMode() throws RemoteException { 2966 ActivityManagerNative.getDefault().exitFreeformMode(mToken); 2967 } 2968 2969 /** Returns the current stack Id for the window. 2970 * @hide 2971 */ 2972 @Override 2973 public int getWindowStackId() throws RemoteException { 2974 return ActivityManagerNative.getDefault().getActivityStackId(mToken); 2975 } 2976 2977 /** 2978 * Puts the activity in picture-in-picture mode if the activity supports. 2979 * @see android.R.attr#supportsPictureInPicture 2980 * @hide 2981 */ 2982 @Override 2983 public void enterPictureInPictureModeIfPossible() { 2984 if (mActivityInfo.resizeMode == ActivityInfo.RESIZE_MODE_RESIZEABLE_AND_PIPABLE) { 2985 enterPictureInPictureMode(); 2986 } 2987 } 2988 2989 /** 2990 * Called to process key events. You can override this to intercept all 2991 * key events before they are dispatched to the window. Be sure to call 2992 * this implementation for key events that should be handled normally. 2993 * 2994 * @param event The key event. 2995 * 2996 * @return boolean Return true if this event was consumed. 2997 */ 2998 public boolean dispatchKeyEvent(KeyEvent event) { 2999 onUserInteraction(); 3000 3001 // Let action bars open menus in response to the menu key prioritized over 3002 // the window handling it 3003 final int keyCode = event.getKeyCode(); 3004 if (keyCode == KeyEvent.KEYCODE_MENU && 3005 mActionBar != null && mActionBar.onMenuKeyEvent(event)) { 3006 return true; 3007 } else if (event.isCtrlPressed() && 3008 event.getUnicodeChar(event.getMetaState() & ~KeyEvent.META_CTRL_MASK) == '<') { 3009 // Capture the Control-< and send focus to the ActionBar 3010 final int action = event.getAction(); 3011 if (action == KeyEvent.ACTION_DOWN) { 3012 final ActionBar actionBar = getActionBar(); 3013 if (actionBar != null && actionBar.isShowing() && actionBar.requestFocus()) { 3014 mEatKeyUpEvent = true; 3015 return true; 3016 } 3017 } else if (action == KeyEvent.ACTION_UP && mEatKeyUpEvent) { 3018 mEatKeyUpEvent = false; 3019 return true; 3020 } 3021 } 3022 3023 Window win = getWindow(); 3024 if (win.superDispatchKeyEvent(event)) { 3025 return true; 3026 } 3027 View decor = mDecor; 3028 if (decor == null) decor = win.getDecorView(); 3029 return event.dispatch(this, decor != null 3030 ? decor.getKeyDispatcherState() : null, this); 3031 } 3032 3033 /** 3034 * Called to process a key shortcut event. 3035 * You can override this to intercept all key shortcut events before they are 3036 * dispatched to the window. Be sure to call this implementation for key shortcut 3037 * events that should be handled normally. 3038 * 3039 * @param event The key shortcut event. 3040 * @return True if this event was consumed. 3041 */ 3042 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 3043 onUserInteraction(); 3044 if (getWindow().superDispatchKeyShortcutEvent(event)) { 3045 return true; 3046 } 3047 return onKeyShortcut(event.getKeyCode(), event); 3048 } 3049 3050 /** 3051 * Called to process touch screen events. You can override this to 3052 * intercept all touch screen events before they are dispatched to the 3053 * window. Be sure to call this implementation for touch screen events 3054 * that should be handled normally. 3055 * 3056 * @param ev The touch screen event. 3057 * 3058 * @return boolean Return true if this event was consumed. 3059 */ 3060 public boolean dispatchTouchEvent(MotionEvent ev) { 3061 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 3062 onUserInteraction(); 3063 } 3064 if (getWindow().superDispatchTouchEvent(ev)) { 3065 return true; 3066 } 3067 return onTouchEvent(ev); 3068 } 3069 3070 /** 3071 * Called to process trackball events. You can override this to 3072 * intercept all trackball events before they are dispatched to the 3073 * window. Be sure to call this implementation for trackball events 3074 * that should be handled normally. 3075 * 3076 * @param ev The trackball event. 3077 * 3078 * @return boolean Return true if this event was consumed. 3079 */ 3080 public boolean dispatchTrackballEvent(MotionEvent ev) { 3081 onUserInteraction(); 3082 if (getWindow().superDispatchTrackballEvent(ev)) { 3083 return true; 3084 } 3085 return onTrackballEvent(ev); 3086 } 3087 3088 /** 3089 * Called to process generic motion events. You can override this to 3090 * intercept all generic motion events before they are dispatched to the 3091 * window. Be sure to call this implementation for generic motion events 3092 * that should be handled normally. 3093 * 3094 * @param ev The generic motion event. 3095 * 3096 * @return boolean Return true if this event was consumed. 3097 */ 3098 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 3099 onUserInteraction(); 3100 if (getWindow().superDispatchGenericMotionEvent(ev)) { 3101 return true; 3102 } 3103 return onGenericMotionEvent(ev); 3104 } 3105 3106 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 3107 event.setClassName(getClass().getName()); 3108 event.setPackageName(getPackageName()); 3109 3110 LayoutParams params = getWindow().getAttributes(); 3111 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 3112 (params.height == LayoutParams.MATCH_PARENT); 3113 event.setFullScreen(isFullScreen); 3114 3115 CharSequence title = getTitle(); 3116 if (!TextUtils.isEmpty(title)) { 3117 event.getText().add(title); 3118 } 3119 3120 return true; 3121 } 3122 3123 /** 3124 * Default implementation of 3125 * {@link android.view.Window.Callback#onCreatePanelView} 3126 * for activities. This 3127 * simply returns null so that all panel sub-windows will have the default 3128 * menu behavior. 3129 */ 3130 @Nullable 3131 public View onCreatePanelView(int featureId) { 3132 return null; 3133 } 3134 3135 /** 3136 * Default implementation of 3137 * {@link android.view.Window.Callback#onCreatePanelMenu} 3138 * for activities. This calls through to the new 3139 * {@link #onCreateOptionsMenu} method for the 3140 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 3141 * so that subclasses of Activity don't need to deal with feature codes. 3142 */ 3143 public boolean onCreatePanelMenu(int featureId, Menu menu) { 3144 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 3145 boolean show = onCreateOptionsMenu(menu); 3146 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 3147 return show; 3148 } 3149 return false; 3150 } 3151 3152 /** 3153 * Default implementation of 3154 * {@link android.view.Window.Callback#onPreparePanel} 3155 * for activities. This 3156 * calls through to the new {@link #onPrepareOptionsMenu} method for the 3157 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 3158 * panel, so that subclasses of 3159 * Activity don't need to deal with feature codes. 3160 */ 3161 public boolean onPreparePanel(int featureId, View view, Menu menu) { 3162 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 3163 boolean goforit = onPrepareOptionsMenu(menu); 3164 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 3165 return goforit; 3166 } 3167 return true; 3168 } 3169 3170 /** 3171 * {@inheritDoc} 3172 * 3173 * @return The default implementation returns true. 3174 */ 3175 public boolean onMenuOpened(int featureId, Menu menu) { 3176 if (featureId == Window.FEATURE_ACTION_BAR) { 3177 initWindowDecorActionBar(); 3178 if (mActionBar != null) { 3179 mActionBar.dispatchMenuVisibilityChanged(true); 3180 } else { 3181 Log.e(TAG, "Tried to open action bar menu with no action bar"); 3182 } 3183 } 3184 return true; 3185 } 3186 3187 /** 3188 * Default implementation of 3189 * {@link android.view.Window.Callback#onMenuItemSelected} 3190 * for activities. This calls through to the new 3191 * {@link #onOptionsItemSelected} method for the 3192 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 3193 * panel, so that subclasses of 3194 * Activity don't need to deal with feature codes. 3195 */ 3196 public boolean onMenuItemSelected(int featureId, MenuItem item) { 3197 CharSequence titleCondensed = item.getTitleCondensed(); 3198 3199 switch (featureId) { 3200 case Window.FEATURE_OPTIONS_PANEL: 3201 // Put event logging here so it gets called even if subclass 3202 // doesn't call through to superclass's implmeentation of each 3203 // of these methods below 3204 if(titleCondensed != null) { 3205 EventLog.writeEvent(50000, 0, titleCondensed.toString()); 3206 } 3207 if (onOptionsItemSelected(item)) { 3208 return true; 3209 } 3210 if (mFragments.dispatchOptionsItemSelected(item)) { 3211 return true; 3212 } 3213 if (item.getItemId() == android.R.id.home && mActionBar != null && 3214 (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) { 3215 if (mParent == null) { 3216 return onNavigateUp(); 3217 } else { 3218 return mParent.onNavigateUpFromChild(this); 3219 } 3220 } 3221 return false; 3222 3223 case Window.FEATURE_CONTEXT_MENU: 3224 if(titleCondensed != null) { 3225 EventLog.writeEvent(50000, 1, titleCondensed.toString()); 3226 } 3227 if (onContextItemSelected(item)) { 3228 return true; 3229 } 3230 return mFragments.dispatchContextItemSelected(item); 3231 3232 default: 3233 return false; 3234 } 3235 } 3236 3237 /** 3238 * Default implementation of 3239 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 3240 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 3241 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 3242 * so that subclasses of Activity don't need to deal with feature codes. 3243 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 3244 * {@link #onContextMenuClosed(Menu)} will be called. 3245 */ 3246 public void onPanelClosed(int featureId, Menu menu) { 3247 switch (featureId) { 3248 case Window.FEATURE_OPTIONS_PANEL: 3249 mFragments.dispatchOptionsMenuClosed(menu); 3250 onOptionsMenuClosed(menu); 3251 break; 3252 3253 case Window.FEATURE_CONTEXT_MENU: 3254 onContextMenuClosed(menu); 3255 break; 3256 3257 case Window.FEATURE_ACTION_BAR: 3258 initWindowDecorActionBar(); 3259 mActionBar.dispatchMenuVisibilityChanged(false); 3260 break; 3261 } 3262 } 3263 3264 /** 3265 * Declare that the options menu has changed, so should be recreated. 3266 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 3267 * time it needs to be displayed. 3268 */ 3269 public void invalidateOptionsMenu() { 3270 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3271 (mActionBar == null || !mActionBar.invalidateOptionsMenu())) { 3272 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 3273 } 3274 } 3275 3276 /** 3277 * Initialize the contents of the Activity's standard options menu. You 3278 * should place your menu items in to <var>menu</var>. 3279 * 3280 * <p>This is only called once, the first time the options menu is 3281 * displayed. To update the menu every time it is displayed, see 3282 * {@link #onPrepareOptionsMenu}. 3283 * 3284 * <p>The default implementation populates the menu with standard system 3285 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 3286 * they will be correctly ordered with application-defined menu items. 3287 * Deriving classes should always call through to the base implementation. 3288 * 3289 * <p>You can safely hold on to <var>menu</var> (and any items created 3290 * from it), making modifications to it as desired, until the next 3291 * time onCreateOptionsMenu() is called. 3292 * 3293 * <p>When you add items to the menu, you can implement the Activity's 3294 * {@link #onOptionsItemSelected} method to handle them there. 3295 * 3296 * @param menu The options menu in which you place your items. 3297 * 3298 * @return You must return true for the menu to be displayed; 3299 * if you return false it will not be shown. 3300 * 3301 * @see #onPrepareOptionsMenu 3302 * @see #onOptionsItemSelected 3303 */ 3304 public boolean onCreateOptionsMenu(Menu menu) { 3305 if (mParent != null) { 3306 return mParent.onCreateOptionsMenu(menu); 3307 } 3308 return true; 3309 } 3310 3311 /** 3312 * Prepare the Screen's standard options menu to be displayed. This is 3313 * called right before the menu is shown, every time it is shown. You can 3314 * use this method to efficiently enable/disable items or otherwise 3315 * dynamically modify the contents. 3316 * 3317 * <p>The default implementation updates the system menu items based on the 3318 * activity's state. Deriving classes should always call through to the 3319 * base class implementation. 3320 * 3321 * @param menu The options menu as last shown or first initialized by 3322 * onCreateOptionsMenu(). 3323 * 3324 * @return You must return true for the menu to be displayed; 3325 * if you return false it will not be shown. 3326 * 3327 * @see #onCreateOptionsMenu 3328 */ 3329 public boolean onPrepareOptionsMenu(Menu menu) { 3330 if (mParent != null) { 3331 return mParent.onPrepareOptionsMenu(menu); 3332 } 3333 return true; 3334 } 3335 3336 /** 3337 * This hook is called whenever an item in your options menu is selected. 3338 * The default implementation simply returns false to have the normal 3339 * processing happen (calling the item's Runnable or sending a message to 3340 * its Handler as appropriate). You can use this method for any items 3341 * for which you would like to do processing without those other 3342 * facilities. 3343 * 3344 * <p>Derived classes should call through to the base class for it to 3345 * perform the default menu handling.</p> 3346 * 3347 * @param item The menu item that was selected. 3348 * 3349 * @return boolean Return false to allow normal menu processing to 3350 * proceed, true to consume it here. 3351 * 3352 * @see #onCreateOptionsMenu 3353 */ 3354 public boolean onOptionsItemSelected(MenuItem item) { 3355 if (mParent != null) { 3356 return mParent.onOptionsItemSelected(item); 3357 } 3358 return false; 3359 } 3360 3361 /** 3362 * This method is called whenever the user chooses to navigate Up within your application's 3363 * activity hierarchy from the action bar. 3364 * 3365 * <p>If the attribute {@link android.R.attr#parentActivityName parentActivityName} 3366 * was specified in the manifest for this activity or an activity-alias to it, 3367 * default Up navigation will be handled automatically. If any activity 3368 * along the parent chain requires extra Intent arguments, the Activity subclass 3369 * should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)} 3370 * to supply those arguments.</p> 3371 * 3372 * <p>See <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 3373 * from the developer guide and <a href="{@docRoot}design/patterns/navigation.html">Navigation</a> 3374 * from the design guide for more information about navigating within your app.</p> 3375 * 3376 * <p>See the {@link TaskStackBuilder} class and the Activity methods 3377 * {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and 3378 * {@link #navigateUpTo(Intent)} for help implementing custom Up navigation. 3379 * The AppNavigation sample application in the Android SDK is also available for reference.</p> 3380 * 3381 * @return true if Up navigation completed successfully and this Activity was finished, 3382 * false otherwise. 3383 */ 3384 public boolean onNavigateUp() { 3385 // Automatically handle hierarchical Up navigation if the proper 3386 // metadata is available. 3387 Intent upIntent = getParentActivityIntent(); 3388 if (upIntent != null) { 3389 if (mActivityInfo.taskAffinity == null) { 3390 // Activities with a null affinity are special; they really shouldn't 3391 // specify a parent activity intent in the first place. Just finish 3392 // the current activity and call it a day. 3393 finish(); 3394 } else if (shouldUpRecreateTask(upIntent)) { 3395 TaskStackBuilder b = TaskStackBuilder.create(this); 3396 onCreateNavigateUpTaskStack(b); 3397 onPrepareNavigateUpTaskStack(b); 3398 b.startActivities(); 3399 3400 // We can't finishAffinity if we have a result. 3401 // Fall back and simply finish the current activity instead. 3402 if (mResultCode != RESULT_CANCELED || mResultData != null) { 3403 // Tell the developer what's going on to avoid hair-pulling. 3404 Log.i(TAG, "onNavigateUp only finishing topmost activity to return a result"); 3405 finish(); 3406 } else { 3407 finishAffinity(); 3408 } 3409 } else { 3410 navigateUpTo(upIntent); 3411 } 3412 return true; 3413 } 3414 return false; 3415 } 3416 3417 /** 3418 * This is called when a child activity of this one attempts to navigate up. 3419 * The default implementation simply calls onNavigateUp() on this activity (the parent). 3420 * 3421 * @param child The activity making the call. 3422 */ 3423 public boolean onNavigateUpFromChild(Activity child) { 3424 return onNavigateUp(); 3425 } 3426 3427 /** 3428 * Define the synthetic task stack that will be generated during Up navigation from 3429 * a different task. 3430 * 3431 * <p>The default implementation of this method adds the parent chain of this activity 3432 * as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications 3433 * may choose to override this method to construct the desired task stack in a different 3434 * way.</p> 3435 * 3436 * <p>This method will be invoked by the default implementation of {@link #onNavigateUp()} 3437 * if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent 3438 * returned by {@link #getParentActivityIntent()}.</p> 3439 * 3440 * <p>Applications that wish to supply extra Intent parameters to the parent stack defined 3441 * by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}.</p> 3442 * 3443 * @param builder An empty TaskStackBuilder - the application should add intents representing 3444 * the desired task stack 3445 */ 3446 public void onCreateNavigateUpTaskStack(TaskStackBuilder builder) { 3447 builder.addParentStack(this); 3448 } 3449 3450 /** 3451 * Prepare the synthetic task stack that will be generated during Up navigation 3452 * from a different task. 3453 * 3454 * <p>This method receives the {@link TaskStackBuilder} with the constructed series of 3455 * Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}. 3456 * If any extra data should be added to these intents before launching the new task, 3457 * the application should override this method and add that data here.</p> 3458 * 3459 * @param builder A TaskStackBuilder that has been populated with Intents by 3460 * onCreateNavigateUpTaskStack. 3461 */ 3462 public void onPrepareNavigateUpTaskStack(TaskStackBuilder builder) { 3463 } 3464 3465 /** 3466 * This hook is called whenever the options menu is being closed (either by the user canceling 3467 * the menu with the back/menu button, or when an item is selected). 3468 * 3469 * @param menu The options menu as last shown or first initialized by 3470 * onCreateOptionsMenu(). 3471 */ 3472 public void onOptionsMenuClosed(Menu menu) { 3473 if (mParent != null) { 3474 mParent.onOptionsMenuClosed(menu); 3475 } 3476 } 3477 3478 /** 3479 * Programmatically opens the options menu. If the options menu is already 3480 * open, this method does nothing. 3481 */ 3482 public void openOptionsMenu() { 3483 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3484 (mActionBar == null || !mActionBar.openOptionsMenu())) { 3485 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 3486 } 3487 } 3488 3489 /** 3490 * Progammatically closes the options menu. If the options menu is already 3491 * closed, this method does nothing. 3492 */ 3493 public void closeOptionsMenu() { 3494 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL)) { 3495 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 3496 } 3497 } 3498 3499 /** 3500 * Called when a context menu for the {@code view} is about to be shown. 3501 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 3502 * time the context menu is about to be shown and should be populated for 3503 * the view (or item inside the view for {@link AdapterView} subclasses, 3504 * this can be found in the {@code menuInfo})). 3505 * <p> 3506 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 3507 * item has been selected. 3508 * <p> 3509 * It is not safe to hold onto the context menu after this method returns. 3510 * 3511 */ 3512 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 3513 } 3514 3515 /** 3516 * Registers a context menu to be shown for the given view (multiple views 3517 * can show the context menu). This method will set the 3518 * {@link OnCreateContextMenuListener} on the view to this activity, so 3519 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 3520 * called when it is time to show the context menu. 3521 * 3522 * @see #unregisterForContextMenu(View) 3523 * @param view The view that should show a context menu. 3524 */ 3525 public void registerForContextMenu(View view) { 3526 view.setOnCreateContextMenuListener(this); 3527 } 3528 3529 /** 3530 * Prevents a context menu to be shown for the given view. This method will remove the 3531 * {@link OnCreateContextMenuListener} on the view. 3532 * 3533 * @see #registerForContextMenu(View) 3534 * @param view The view that should stop showing a context menu. 3535 */ 3536 public void unregisterForContextMenu(View view) { 3537 view.setOnCreateContextMenuListener(null); 3538 } 3539 3540 /** 3541 * Programmatically opens the context menu for a particular {@code view}. 3542 * The {@code view} should have been added via 3543 * {@link #registerForContextMenu(View)}. 3544 * 3545 * @param view The view to show the context menu for. 3546 */ 3547 public void openContextMenu(View view) { 3548 view.showContextMenu(); 3549 } 3550 3551 /** 3552 * Programmatically closes the most recently opened context menu, if showing. 3553 */ 3554 public void closeContextMenu() { 3555 if (mWindow.hasFeature(Window.FEATURE_CONTEXT_MENU)) { 3556 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 3557 } 3558 } 3559 3560 /** 3561 * This hook is called whenever an item in a context menu is selected. The 3562 * default implementation simply returns false to have the normal processing 3563 * happen (calling the item's Runnable or sending a message to its Handler 3564 * as appropriate). You can use this method for any items for which you 3565 * would like to do processing without those other facilities. 3566 * <p> 3567 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 3568 * View that added this menu item. 3569 * <p> 3570 * Derived classes should call through to the base class for it to perform 3571 * the default menu handling. 3572 * 3573 * @param item The context menu item that was selected. 3574 * @return boolean Return false to allow normal context menu processing to 3575 * proceed, true to consume it here. 3576 */ 3577 public boolean onContextItemSelected(MenuItem item) { 3578 if (mParent != null) { 3579 return mParent.onContextItemSelected(item); 3580 } 3581 return false; 3582 } 3583 3584 /** 3585 * This hook is called whenever the context menu is being closed (either by 3586 * the user canceling the menu with the back/menu button, or when an item is 3587 * selected). 3588 * 3589 * @param menu The context menu that is being closed. 3590 */ 3591 public void onContextMenuClosed(Menu menu) { 3592 if (mParent != null) { 3593 mParent.onContextMenuClosed(menu); 3594 } 3595 } 3596 3597 /** 3598 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 3599 */ 3600 @Deprecated 3601 protected Dialog onCreateDialog(int id) { 3602 return null; 3603 } 3604 3605 /** 3606 * Callback for creating dialogs that are managed (saved and restored) for you 3607 * by the activity. The default implementation calls through to 3608 * {@link #onCreateDialog(int)} for compatibility. 3609 * 3610 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3611 * or later, consider instead using a {@link DialogFragment} instead.</em> 3612 * 3613 * <p>If you use {@link #showDialog(int)}, the activity will call through to 3614 * this method the first time, and hang onto it thereafter. Any dialog 3615 * that is created by this method will automatically be saved and restored 3616 * for you, including whether it is showing. 3617 * 3618 * <p>If you would like the activity to manage saving and restoring dialogs 3619 * for you, you should override this method and handle any ids that are 3620 * passed to {@link #showDialog}. 3621 * 3622 * <p>If you would like an opportunity to prepare your dialog before it is shown, 3623 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 3624 * 3625 * @param id The id of the dialog. 3626 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3627 * @return The dialog. If you return null, the dialog will not be created. 3628 * 3629 * @see #onPrepareDialog(int, Dialog, Bundle) 3630 * @see #showDialog(int, Bundle) 3631 * @see #dismissDialog(int) 3632 * @see #removeDialog(int) 3633 * 3634 * @deprecated Use the new {@link DialogFragment} class with 3635 * {@link FragmentManager} instead; this is also 3636 * available on older platforms through the Android compatibility package. 3637 */ 3638 @Nullable 3639 @Deprecated 3640 protected Dialog onCreateDialog(int id, Bundle args) { 3641 return onCreateDialog(id); 3642 } 3643 3644 /** 3645 * @deprecated Old no-arguments version of 3646 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 3647 */ 3648 @Deprecated 3649 protected void onPrepareDialog(int id, Dialog dialog) { 3650 dialog.setOwnerActivity(this); 3651 } 3652 3653 /** 3654 * Provides an opportunity to prepare a managed dialog before it is being 3655 * shown. The default implementation calls through to 3656 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 3657 * 3658 * <p> 3659 * Override this if you need to update a managed dialog based on the state 3660 * of the application each time it is shown. For example, a time picker 3661 * dialog might want to be updated with the current time. You should call 3662 * through to the superclass's implementation. The default implementation 3663 * will set this Activity as the owner activity on the Dialog. 3664 * 3665 * @param id The id of the managed dialog. 3666 * @param dialog The dialog. 3667 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3668 * @see #onCreateDialog(int, Bundle) 3669 * @see #showDialog(int) 3670 * @see #dismissDialog(int) 3671 * @see #removeDialog(int) 3672 * 3673 * @deprecated Use the new {@link DialogFragment} class with 3674 * {@link FragmentManager} instead; this is also 3675 * available on older platforms through the Android compatibility package. 3676 */ 3677 @Deprecated 3678 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 3679 onPrepareDialog(id, dialog); 3680 } 3681 3682 /** 3683 * Simple version of {@link #showDialog(int, Bundle)} that does not 3684 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 3685 * with null arguments. 3686 * 3687 * @deprecated Use the new {@link DialogFragment} class with 3688 * {@link FragmentManager} instead; this is also 3689 * available on older platforms through the Android compatibility package. 3690 */ 3691 @Deprecated 3692 public final void showDialog(int id) { 3693 showDialog(id, null); 3694 } 3695 3696 /** 3697 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 3698 * will be made with the same id the first time this is called for a given 3699 * id. From thereafter, the dialog will be automatically saved and restored. 3700 * 3701 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3702 * or later, consider instead using a {@link DialogFragment} instead.</em> 3703 * 3704 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 3705 * be made to provide an opportunity to do any timely preparation. 3706 * 3707 * @param id The id of the managed dialog. 3708 * @param args Arguments to pass through to the dialog. These will be saved 3709 * and restored for you. Note that if the dialog is already created, 3710 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 3711 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 3712 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 3713 * @return Returns true if the Dialog was created; false is returned if 3714 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 3715 * 3716 * @see Dialog 3717 * @see #onCreateDialog(int, Bundle) 3718 * @see #onPrepareDialog(int, Dialog, Bundle) 3719 * @see #dismissDialog(int) 3720 * @see #removeDialog(int) 3721 * 3722 * @deprecated Use the new {@link DialogFragment} class with 3723 * {@link FragmentManager} instead; this is also 3724 * available on older platforms through the Android compatibility package. 3725 */ 3726 @Nullable 3727 @Deprecated 3728 public final boolean showDialog(int id, Bundle args) { 3729 if (mManagedDialogs == null) { 3730 mManagedDialogs = new SparseArray<ManagedDialog>(); 3731 } 3732 ManagedDialog md = mManagedDialogs.get(id); 3733 if (md == null) { 3734 md = new ManagedDialog(); 3735 md.mDialog = createDialog(id, null, args); 3736 if (md.mDialog == null) { 3737 return false; 3738 } 3739 mManagedDialogs.put(id, md); 3740 } 3741 3742 md.mArgs = args; 3743 onPrepareDialog(id, md.mDialog, args); 3744 md.mDialog.show(); 3745 return true; 3746 } 3747 3748 /** 3749 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 3750 * 3751 * @param id The id of the managed dialog. 3752 * 3753 * @throws IllegalArgumentException if the id was not previously shown via 3754 * {@link #showDialog(int)}. 3755 * 3756 * @see #onCreateDialog(int, Bundle) 3757 * @see #onPrepareDialog(int, Dialog, Bundle) 3758 * @see #showDialog(int) 3759 * @see #removeDialog(int) 3760 * 3761 * @deprecated Use the new {@link DialogFragment} class with 3762 * {@link FragmentManager} instead; this is also 3763 * available on older platforms through the Android compatibility package. 3764 */ 3765 @Deprecated 3766 public final void dismissDialog(int id) { 3767 if (mManagedDialogs == null) { 3768 throw missingDialog(id); 3769 } 3770 3771 final ManagedDialog md = mManagedDialogs.get(id); 3772 if (md == null) { 3773 throw missingDialog(id); 3774 } 3775 md.mDialog.dismiss(); 3776 } 3777 3778 /** 3779 * Creates an exception to throw if a user passed in a dialog id that is 3780 * unexpected. 3781 */ 3782 private IllegalArgumentException missingDialog(int id) { 3783 return new IllegalArgumentException("no dialog with id " + id + " was ever " 3784 + "shown via Activity#showDialog"); 3785 } 3786 3787 /** 3788 * Removes any internal references to a dialog managed by this Activity. 3789 * If the dialog is showing, it will dismiss it as part of the clean up. 3790 * 3791 * <p>This can be useful if you know that you will never show a dialog again and 3792 * want to avoid the overhead of saving and restoring it in the future. 3793 * 3794 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 3795 * will not throw an exception if you try to remove an ID that does not 3796 * currently have an associated dialog.</p> 3797 * 3798 * @param id The id of the managed dialog. 3799 * 3800 * @see #onCreateDialog(int, Bundle) 3801 * @see #onPrepareDialog(int, Dialog, Bundle) 3802 * @see #showDialog(int) 3803 * @see #dismissDialog(int) 3804 * 3805 * @deprecated Use the new {@link DialogFragment} class with 3806 * {@link FragmentManager} instead; this is also 3807 * available on older platforms through the Android compatibility package. 3808 */ 3809 @Deprecated 3810 public final void removeDialog(int id) { 3811 if (mManagedDialogs != null) { 3812 final ManagedDialog md = mManagedDialogs.get(id); 3813 if (md != null) { 3814 md.mDialog.dismiss(); 3815 mManagedDialogs.remove(id); 3816 } 3817 } 3818 } 3819 3820 /** 3821 * This hook is called when the user signals the desire to start a search. 3822 * 3823 * <p>You can use this function as a simple way to launch the search UI, in response to a 3824 * menu item, search button, or other widgets within your activity. Unless overidden, 3825 * calling this function is the same as calling 3826 * {@link #startSearch startSearch(null, false, null, false)}, which launches 3827 * search for the current activity as specified in its manifest, see {@link SearchManager}. 3828 * 3829 * <p>You can override this function to force global search, e.g. in response to a dedicated 3830 * search key, or to block search entirely (by simply returning false). 3831 * 3832 * <p>Note: when running in a {@link Configuration#UI_MODE_TYPE_TELEVISION}, the default 3833 * implementation changes to simply return false and you must supply your own custom 3834 * implementation if you want to support search.</p> 3835 * 3836 * @param searchEvent The {@link SearchEvent} that signaled this search. 3837 * @return Returns {@code true} if search launched, and {@code false} if the activity does 3838 * not respond to search. The default implementation always returns {@code true}, except 3839 * when in {@link Configuration#UI_MODE_TYPE_TELEVISION} mode where it returns false. 3840 * 3841 * @see android.app.SearchManager 3842 */ 3843 public boolean onSearchRequested(@Nullable SearchEvent searchEvent) { 3844 mSearchEvent = searchEvent; 3845 boolean result = onSearchRequested(); 3846 mSearchEvent = null; 3847 return result; 3848 } 3849 3850 /** 3851 * @see #onSearchRequested(SearchEvent) 3852 */ 3853 public boolean onSearchRequested() { 3854 if ((getResources().getConfiguration().uiMode&Configuration.UI_MODE_TYPE_MASK) 3855 != Configuration.UI_MODE_TYPE_TELEVISION) { 3856 startSearch(null, false, null, false); 3857 return true; 3858 } else { 3859 return false; 3860 } 3861 } 3862 3863 /** 3864 * During the onSearchRequested() callbacks, this function will return the 3865 * {@link SearchEvent} that triggered the callback, if it exists. 3866 * 3867 * @return SearchEvent The SearchEvent that triggered the {@link 3868 * #onSearchRequested} callback. 3869 */ 3870 public final SearchEvent getSearchEvent() { 3871 return mSearchEvent; 3872 } 3873 3874 /** 3875 * This hook is called to launch the search UI. 3876 * 3877 * <p>It is typically called from onSearchRequested(), either directly from 3878 * Activity.onSearchRequested() or from an overridden version in any given 3879 * Activity. If your goal is simply to activate search, it is preferred to call 3880 * onSearchRequested(), which may have been overridden elsewhere in your Activity. If your goal 3881 * is to inject specific data such as context data, it is preferred to <i>override</i> 3882 * onSearchRequested(), so that any callers to it will benefit from the override. 3883 * 3884 * @param initialQuery Any non-null non-empty string will be inserted as 3885 * pre-entered text in the search query box. 3886 * @param selectInitialQuery If true, the initial query will be preselected, which means that 3887 * any further typing will replace it. This is useful for cases where an entire pre-formed 3888 * query is being inserted. If false, the selection point will be placed at the end of the 3889 * inserted query. This is useful when the inserted query is text that the user entered, 3890 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 3891 * if initialQuery is a non-empty string.</i> 3892 * @param appSearchData An application can insert application-specific 3893 * context here, in order to improve quality or specificity of its own 3894 * searches. This data will be returned with SEARCH intent(s). Null if 3895 * no extra data is required. 3896 * @param globalSearch If false, this will only launch the search that has been specifically 3897 * defined by the application (which is usually defined as a local search). If no default 3898 * search is defined in the current application or activity, global search will be launched. 3899 * If true, this will always launch a platform-global (e.g. web-based) search instead. 3900 * 3901 * @see android.app.SearchManager 3902 * @see #onSearchRequested 3903 */ 3904 public void startSearch(@Nullable String initialQuery, boolean selectInitialQuery, 3905 @Nullable Bundle appSearchData, boolean globalSearch) { 3906 ensureSearchManager(); 3907 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 3908 appSearchData, globalSearch); 3909 } 3910 3911 /** 3912 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 3913 * the search dialog. Made available for testing purposes. 3914 * 3915 * @param query The query to trigger. If empty, the request will be ignored. 3916 * @param appSearchData An application can insert application-specific 3917 * context here, in order to improve quality or specificity of its own 3918 * searches. This data will be returned with SEARCH intent(s). Null if 3919 * no extra data is required. 3920 */ 3921 public void triggerSearch(String query, @Nullable Bundle appSearchData) { 3922 ensureSearchManager(); 3923 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 3924 } 3925 3926 /** 3927 * Request that key events come to this activity. Use this if your 3928 * activity has no views with focus, but the activity still wants 3929 * a chance to process key events. 3930 * 3931 * @see android.view.Window#takeKeyEvents 3932 */ 3933 public void takeKeyEvents(boolean get) { 3934 getWindow().takeKeyEvents(get); 3935 } 3936 3937 /** 3938 * Enable extended window features. This is a convenience for calling 3939 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 3940 * 3941 * @param featureId The desired feature as defined in 3942 * {@link android.view.Window}. 3943 * @return Returns true if the requested feature is supported and now 3944 * enabled. 3945 * 3946 * @see android.view.Window#requestFeature 3947 */ 3948 public final boolean requestWindowFeature(int featureId) { 3949 return getWindow().requestFeature(featureId); 3950 } 3951 3952 /** 3953 * Convenience for calling 3954 * {@link android.view.Window#setFeatureDrawableResource}. 3955 */ 3956 public final void setFeatureDrawableResource(int featureId, @DrawableRes int resId) { 3957 getWindow().setFeatureDrawableResource(featureId, resId); 3958 } 3959 3960 /** 3961 * Convenience for calling 3962 * {@link android.view.Window#setFeatureDrawableUri}. 3963 */ 3964 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3965 getWindow().setFeatureDrawableUri(featureId, uri); 3966 } 3967 3968 /** 3969 * Convenience for calling 3970 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3971 */ 3972 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3973 getWindow().setFeatureDrawable(featureId, drawable); 3974 } 3975 3976 /** 3977 * Convenience for calling 3978 * {@link android.view.Window#setFeatureDrawableAlpha}. 3979 */ 3980 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3981 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3982 } 3983 3984 /** 3985 * Convenience for calling 3986 * {@link android.view.Window#getLayoutInflater}. 3987 */ 3988 @NonNull 3989 public LayoutInflater getLayoutInflater() { 3990 return getWindow().getLayoutInflater(); 3991 } 3992 3993 /** 3994 * Returns a {@link MenuInflater} with this context. 3995 */ 3996 @NonNull 3997 public MenuInflater getMenuInflater() { 3998 // Make sure that action views can get an appropriate theme. 3999 if (mMenuInflater == null) { 4000 initWindowDecorActionBar(); 4001 if (mActionBar != null) { 4002 mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this); 4003 } else { 4004 mMenuInflater = new MenuInflater(this); 4005 } 4006 } 4007 return mMenuInflater; 4008 } 4009 4010 @Override 4011 public void setTheme(int resid) { 4012 super.setTheme(resid); 4013 mWindow.setTheme(resid); 4014 } 4015 4016 @Override 4017 protected void onApplyThemeResource(Resources.Theme theme, @StyleRes int resid, 4018 boolean first) { 4019 if (mParent == null) { 4020 super.onApplyThemeResource(theme, resid, first); 4021 } else { 4022 try { 4023 theme.setTo(mParent.getTheme()); 4024 } catch (Exception e) { 4025 // Empty 4026 } 4027 theme.applyStyle(resid, false); 4028 } 4029 4030 // Get the primary color and update the TaskDescription for this activity 4031 TypedArray a = theme.obtainStyledAttributes( 4032 com.android.internal.R.styleable.ActivityTaskDescription); 4033 if (mTaskDescription.getPrimaryColor() == 0) { 4034 int colorPrimary = a.getColor( 4035 com.android.internal.R.styleable.ActivityTaskDescription_colorPrimary, 0); 4036 if (colorPrimary != 0 && Color.alpha(colorPrimary) == 0xFF) { 4037 mTaskDescription.setPrimaryColor(colorPrimary); 4038 } 4039 } 4040 // For dev-preview only. 4041 if (mTaskDescription.getBackgroundColor() == 0) { 4042 int colorBackground = a.getColor( 4043 com.android.internal.R.styleable.ActivityTaskDescription_colorBackground, 0); 4044 if (colorBackground != 0 && Color.alpha(colorBackground) == 0xFF) { 4045 mTaskDescription.setBackgroundColor(colorBackground); 4046 } 4047 } 4048 a.recycle(); 4049 setTaskDescription(mTaskDescription); 4050 } 4051 4052 /** 4053 * Requests permissions to be granted to this application. These permissions 4054 * must be requested in your manifest, they should not be granted to your app, 4055 * and they should have protection level {@link android.content.pm.PermissionInfo 4056 * #PROTECTION_DANGEROUS dangerous}, regardless whether they are declared by 4057 * the platform or a third-party app. 4058 * <p> 4059 * Normal permissions {@link android.content.pm.PermissionInfo#PROTECTION_NORMAL} 4060 * are granted at install time if requested in the manifest. Signature permissions 4061 * {@link android.content.pm.PermissionInfo#PROTECTION_SIGNATURE} are granted at 4062 * install time if requested in the manifest and the signature of your app matches 4063 * the signature of the app declaring the permissions. 4064 * </p> 4065 * <p> 4066 * If your app does not have the requested permissions the user will be presented 4067 * with UI for accepting them. After the user has accepted or rejected the 4068 * requested permissions you will receive a callback on {@link 4069 * #onRequestPermissionsResult(int, String[], int[])} reporting whether the 4070 * permissions were granted or not. 4071 * </p> 4072 * <p> 4073 * Note that requesting a permission does not guarantee it will be granted and 4074 * your app should be able to run without having this permission. 4075 * </p> 4076 * <p> 4077 * This method may start an activity allowing the user to choose which permissions 4078 * to grant and which to reject. Hence, you should be prepared that your activity 4079 * may be paused and resumed. Further, granting some permissions may require 4080 * a restart of you application. In such a case, the system will recreate the 4081 * activity stack before delivering the result to {@link 4082 * #onRequestPermissionsResult(int, String[], int[])}. 4083 * </p> 4084 * <p> 4085 * When checking whether you have a permission you should use {@link 4086 * #checkSelfPermission(String)}. 4087 * </p> 4088 * <p> 4089 * Calling this API for permissions already granted to your app would show UI 4090 * to the user to decide whether the app can still hold these permissions. This 4091 * can be useful if the way your app uses data guarded by the permissions 4092 * changes significantly. 4093 * </p> 4094 * <p> 4095 * You cannot request a permission if your activity sets {@link 4096 * android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 4097 * <code>true</code> because in this case the activity would not receive 4098 * result callbacks including {@link #onRequestPermissionsResult(int, String[], int[])}. 4099 * </p> 4100 * <p> 4101 * The <a href="http://developer.android.com/samples/RuntimePermissions/index.html"> 4102 * RuntimePermissions</a> sample app demonstrates how to use this method to 4103 * request permissions at run time. 4104 * </p> 4105 * 4106 * @param permissions The requested permissions. Must me non-null and not empty. 4107 * @param requestCode Application specific request code to match with a result 4108 * reported to {@link #onRequestPermissionsResult(int, String[], int[])}. 4109 * Should be >= 0. 4110 * 4111 * @throws IllegalArgumentException if requestCode is negative. 4112 * 4113 * @see #onRequestPermissionsResult(int, String[], int[]) 4114 * @see #checkSelfPermission(String) 4115 * @see #shouldShowRequestPermissionRationale(String) 4116 */ 4117 public final void requestPermissions(@NonNull String[] permissions, int requestCode) { 4118 if (requestCode < 0) { 4119 throw new IllegalArgumentException("requestCode should be >= 0"); 4120 } 4121 if (mHasCurrentPermissionsRequest) { 4122 Log.w(TAG, "Can reqeust only one set of permissions at a time"); 4123 // Dispatch the callback with empty arrays which means a cancellation. 4124 onRequestPermissionsResult(requestCode, new String[0], new int[0]); 4125 return; 4126 } 4127 Intent intent = getPackageManager().buildRequestPermissionsIntent(permissions); 4128 startActivityForResult(REQUEST_PERMISSIONS_WHO_PREFIX, intent, requestCode, null); 4129 mHasCurrentPermissionsRequest = true; 4130 } 4131 4132 /** 4133 * Callback for the result from requesting permissions. This method 4134 * is invoked for every call on {@link #requestPermissions(String[], int)}. 4135 * <p> 4136 * <strong>Note:</strong> It is possible that the permissions request interaction 4137 * with the user is interrupted. In this case you will receive empty permissions 4138 * and results arrays which should be treated as a cancellation. 4139 * </p> 4140 * 4141 * @param requestCode The request code passed in {@link #requestPermissions(String[], int)}. 4142 * @param permissions The requested permissions. Never null. 4143 * @param grantResults The grant results for the corresponding permissions 4144 * which is either {@link android.content.pm.PackageManager#PERMISSION_GRANTED} 4145 * or {@link android.content.pm.PackageManager#PERMISSION_DENIED}. Never null. 4146 * 4147 * @see #requestPermissions(String[], int) 4148 */ 4149 public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, 4150 @NonNull int[] grantResults) { 4151 /* callback - no nothing */ 4152 } 4153 4154 /** 4155 * Gets whether you should show UI with rationale for requesting a permission. 4156 * You should do this only if you do not have the permission and the context in 4157 * which the permission is requested does not clearly communicate to the user 4158 * what would be the benefit from granting this permission. 4159 * <p> 4160 * For example, if you write a camera app, requesting the camera permission 4161 * would be expected by the user and no rationale for why it is requested is 4162 * needed. If however, the app needs location for tagging photos then a non-tech 4163 * savvy user may wonder how location is related to taking photos. In this case 4164 * you may choose to show UI with rationale of requesting this permission. 4165 * </p> 4166 * 4167 * @param permission A permission your app wants to request. 4168 * @return Whether you can show permission rationale UI. 4169 * 4170 * @see #checkSelfPermission(String) 4171 * @see #requestPermissions(String[], int) 4172 * @see #onRequestPermissionsResult(int, String[], int[]) 4173 */ 4174 public boolean shouldShowRequestPermissionRationale(@NonNull String permission) { 4175 return getPackageManager().shouldShowRequestPermissionRationale(permission); 4176 } 4177 4178 /** 4179 * Same as calling {@link #startActivityForResult(Intent, int, Bundle)} 4180 * with no options. 4181 * 4182 * @param intent The intent to start. 4183 * @param requestCode If >= 0, this code will be returned in 4184 * onActivityResult() when the activity exits. 4185 * 4186 * @throws android.content.ActivityNotFoundException 4187 * 4188 * @see #startActivity 4189 */ 4190 public void startActivityForResult(@RequiresPermission Intent intent, int requestCode) { 4191 startActivityForResult(intent, requestCode, null); 4192 } 4193 4194 /** 4195 * Launch an activity for which you would like a result when it finished. 4196 * When this activity exits, your 4197 * onActivityResult() method will be called with the given requestCode. 4198 * Using a negative requestCode is the same as calling 4199 * {@link #startActivity} (the activity is not launched as a sub-activity). 4200 * 4201 * <p>Note that this method should only be used with Intent protocols 4202 * that are defined to return a result. In other protocols (such as 4203 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 4204 * not get the result when you expect. For example, if the activity you 4205 * are launching uses the singleTask launch mode, it will not run in your 4206 * task and thus you will immediately receive a cancel result. 4207 * 4208 * <p>As a special case, if you call startActivityForResult() with a requestCode 4209 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 4210 * activity, then your window will not be displayed until a result is 4211 * returned back from the started activity. This is to avoid visible 4212 * flickering when redirecting to another activity. 4213 * 4214 * <p>This method throws {@link android.content.ActivityNotFoundException} 4215 * if there was no Activity found to run the given Intent. 4216 * 4217 * @param intent The intent to start. 4218 * @param requestCode If >= 0, this code will be returned in 4219 * onActivityResult() when the activity exits. 4220 * @param options Additional options for how the Activity should be started. 4221 * See {@link android.content.Context#startActivity(Intent, Bundle) 4222 * Context.startActivity(Intent, Bundle)} for more details. 4223 * 4224 * @throws android.content.ActivityNotFoundException 4225 * 4226 * @see #startActivity 4227 */ 4228 public void startActivityForResult(@RequiresPermission Intent intent, int requestCode, 4229 @Nullable Bundle options) { 4230 if (mParent == null) { 4231 Instrumentation.ActivityResult ar = 4232 mInstrumentation.execStartActivity( 4233 this, mMainThread.getApplicationThread(), mToken, this, 4234 intent, requestCode, options); 4235 if (ar != null) { 4236 mMainThread.sendActivityResult( 4237 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 4238 ar.getResultData()); 4239 } 4240 if (requestCode >= 0) { 4241 // If this start is requesting a result, we can avoid making 4242 // the activity visible until the result is received. Setting 4243 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4244 // activity hidden during this time, to avoid flickering. 4245 // This can only be done when a result is requested because 4246 // that guarantees we will get information back when the 4247 // activity is finished, no matter what happens to it. 4248 mStartedActivity = true; 4249 } 4250 4251 cancelInputsAndStartExitTransition(options); 4252 // TODO Consider clearing/flushing other event sources and events for child windows. 4253 } else { 4254 if (options != null) { 4255 mParent.startActivityFromChild(this, intent, requestCode, options); 4256 } else { 4257 // Note we want to go through this method for compatibility with 4258 // existing applications that may have overridden it. 4259 mParent.startActivityFromChild(this, intent, requestCode); 4260 } 4261 } 4262 } 4263 4264 /** 4265 * Cancels pending inputs and if an Activity Transition is to be run, starts the transition. 4266 * 4267 * @param options The ActivityOptions bundle used to start an Activity. 4268 */ 4269 private void cancelInputsAndStartExitTransition(Bundle options) { 4270 final View decor = mWindow != null ? mWindow.peekDecorView() : null; 4271 if (decor != null) { 4272 decor.cancelPendingInputEvents(); 4273 } 4274 if (options != null && !isTopOfTask()) { 4275 mActivityTransitionState.startExitOutTransition(this, 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 Instrumentation.ActivityResult ar = mInstrumentation.execStartActivity( 4295 this, mMainThread.getApplicationThread(), mToken, this, intent, requestCode, 4296 options, user); 4297 if (ar != null) { 4298 mMainThread.sendActivityResult( 4299 mToken, mEmbeddedID, requestCode, ar.getResultCode(), ar.getResultData()); 4300 } 4301 if (requestCode >= 0) { 4302 // If this start is requesting a result, we can avoid making 4303 // the activity visible until the result is received. Setting 4304 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4305 // activity hidden during this time, to avoid flickering. 4306 // This can only be done when a result is requested because 4307 // that guarantees we will get information back when the 4308 // activity is finished, no matter what happens to it. 4309 mStartedActivity = true; 4310 } 4311 4312 cancelInputsAndStartExitTransition(options); 4313 } 4314 4315 /** 4316 * @hide Implement to provide correct calling token. 4317 */ 4318 public void startActivityAsUser(Intent intent, UserHandle user) { 4319 startActivityAsUser(intent, null, user); 4320 } 4321 4322 /** 4323 * @hide Implement to provide correct calling token. 4324 */ 4325 public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) { 4326 if (mParent != null) { 4327 throw new RuntimeException("Can't be called from a child"); 4328 } 4329 Instrumentation.ActivityResult ar = 4330 mInstrumentation.execStartActivity( 4331 this, mMainThread.getApplicationThread(), mToken, this, 4332 intent, -1, options, user); 4333 if (ar != null) { 4334 mMainThread.sendActivityResult( 4335 mToken, mEmbeddedID, -1, ar.getResultCode(), 4336 ar.getResultData()); 4337 } 4338 cancelInputsAndStartExitTransition(options); 4339 } 4340 4341 /** 4342 * Start a new activity as if it was started by the activity that started our 4343 * current activity. This is for the resolver and chooser activities, which operate 4344 * as intermediaries that dispatch their intent to the target the user selects -- to 4345 * do this, they must perform all security checks including permission grants as if 4346 * their launch had come from the original activity. 4347 * @param intent The Intent to start. 4348 * @param options ActivityOptions or null. 4349 * @param ignoreTargetSecurity If true, the activity manager will not check whether the 4350 * caller it is doing the start is, is actually allowed to start the target activity. 4351 * If you set this to true, you must set an explicit component in the Intent and do any 4352 * appropriate security checks yourself. 4353 * @param userId The user the new activity should run as. 4354 * @hide 4355 */ 4356 public void startActivityAsCaller(Intent intent, @Nullable Bundle options, 4357 boolean ignoreTargetSecurity, int userId) { 4358 if (mParent != null) { 4359 throw new RuntimeException("Can't be called from a child"); 4360 } 4361 Instrumentation.ActivityResult ar = 4362 mInstrumentation.execStartActivityAsCaller( 4363 this, mMainThread.getApplicationThread(), mToken, this, 4364 intent, -1, options, ignoreTargetSecurity, userId); 4365 if (ar != null) { 4366 mMainThread.sendActivityResult( 4367 mToken, mEmbeddedID, -1, ar.getResultCode(), 4368 ar.getResultData()); 4369 } 4370 cancelInputsAndStartExitTransition(options); 4371 } 4372 4373 /** 4374 * Same as calling {@link #startIntentSenderForResult(IntentSender, int, 4375 * Intent, int, int, int, Bundle)} with no options. 4376 * 4377 * @param intent The IntentSender to launch. 4378 * @param requestCode If >= 0, this code will be returned in 4379 * onActivityResult() when the activity exits. 4380 * @param fillInIntent If non-null, this will be provided as the 4381 * intent parameter to {@link IntentSender#sendIntent}. 4382 * @param flagsMask Intent flags in the original IntentSender that you 4383 * would like to change. 4384 * @param flagsValues Desired values for any bits set in 4385 * <var>flagsMask</var> 4386 * @param extraFlags Always set to 0. 4387 */ 4388 public void startIntentSenderForResult(IntentSender intent, int requestCode, 4389 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4390 throws IntentSender.SendIntentException { 4391 startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, 4392 flagsValues, extraFlags, null); 4393 } 4394 4395 /** 4396 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 4397 * to use a IntentSender to describe the activity to be started. If 4398 * the IntentSender is for an activity, that activity will be started 4399 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 4400 * here; otherwise, its associated action will be executed (such as 4401 * sending a broadcast) as if you had called 4402 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 4403 * 4404 * @param intent The IntentSender to launch. 4405 * @param requestCode If >= 0, this code will be returned in 4406 * onActivityResult() when the activity exits. 4407 * @param fillInIntent If non-null, this will be provided as the 4408 * intent parameter to {@link IntentSender#sendIntent}. 4409 * @param flagsMask Intent flags in the original IntentSender that you 4410 * would like to change. 4411 * @param flagsValues Desired values for any bits set in 4412 * <var>flagsMask</var> 4413 * @param extraFlags Always set to 0. 4414 * @param options Additional options for how the Activity should be started. 4415 * See {@link android.content.Context#startActivity(Intent, Bundle) 4416 * Context.startActivity(Intent, Bundle)} for more details. If options 4417 * have also been supplied by the IntentSender, options given here will 4418 * override any that conflict with those given by the IntentSender. 4419 */ 4420 public void startIntentSenderForResult(IntentSender intent, int requestCode, 4421 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4422 Bundle options) throws IntentSender.SendIntentException { 4423 if (mParent == null) { 4424 startIntentSenderForResultInner(intent, mEmbeddedID, requestCode, fillInIntent, 4425 flagsMask, flagsValues, options); 4426 } else if (options != null) { 4427 mParent.startIntentSenderFromChild(this, intent, requestCode, 4428 fillInIntent, flagsMask, flagsValues, extraFlags, options); 4429 } else { 4430 // Note we want to go through this call for compatibility with 4431 // existing applications that may have overridden the method. 4432 mParent.startIntentSenderFromChild(this, intent, requestCode, 4433 fillInIntent, flagsMask, flagsValues, extraFlags); 4434 } 4435 } 4436 4437 private void startIntentSenderForResultInner(IntentSender intent, String who, int requestCode, 4438 Intent fillInIntent, int flagsMask, int flagsValues, 4439 Bundle options) 4440 throws IntentSender.SendIntentException { 4441 try { 4442 String resolvedType = null; 4443 if (fillInIntent != null) { 4444 fillInIntent.migrateExtraStreamToClipData(); 4445 fillInIntent.prepareToLeaveProcess(this); 4446 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 4447 } 4448 int result = ActivityManagerNative.getDefault() 4449 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 4450 fillInIntent, resolvedType, mToken, who, 4451 requestCode, flagsMask, flagsValues, options); 4452 if (result == ActivityManager.START_CANCELED) { 4453 throw new IntentSender.SendIntentException(); 4454 } 4455 Instrumentation.checkStartActivityResult(result, null); 4456 } catch (RemoteException e) { 4457 } 4458 if (requestCode >= 0) { 4459 // If this start is requesting a result, we can avoid making 4460 // the activity visible until the result is received. Setting 4461 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4462 // activity hidden during this time, to avoid flickering. 4463 // This can only be done when a result is requested because 4464 // that guarantees we will get information back when the 4465 // activity is finished, no matter what happens to it. 4466 mStartedActivity = true; 4467 } 4468 } 4469 4470 /** 4471 * Same as {@link #startActivity(Intent, Bundle)} with no options 4472 * specified. 4473 * 4474 * @param intent The intent to start. 4475 * 4476 * @throws android.content.ActivityNotFoundException 4477 * 4478 * @see {@link #startActivity(Intent, Bundle)} 4479 * @see #startActivityForResult 4480 */ 4481 @Override 4482 public void startActivity(Intent intent) { 4483 this.startActivity(intent, null); 4484 } 4485 4486 /** 4487 * Launch a new activity. You will not receive any information about when 4488 * the activity exits. This implementation overrides the base version, 4489 * providing information about 4490 * the activity performing the launch. Because of this additional 4491 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4492 * required; if not specified, the new activity will be added to the 4493 * task of the caller. 4494 * 4495 * <p>This method throws {@link android.content.ActivityNotFoundException} 4496 * if there was no Activity found to run the given Intent. 4497 * 4498 * @param intent The intent to start. 4499 * @param options Additional options for how the Activity should be started. 4500 * See {@link android.content.Context#startActivity(Intent, Bundle) 4501 * Context.startActivity(Intent, Bundle)} for more details. 4502 * 4503 * @throws android.content.ActivityNotFoundException 4504 * 4505 * @see {@link #startActivity(Intent)} 4506 * @see #startActivityForResult 4507 */ 4508 @Override 4509 public void startActivity(Intent intent, @Nullable Bundle options) { 4510 if (options != null) { 4511 startActivityForResult(intent, -1, options); 4512 } else { 4513 // Note we want to go through this call for compatibility with 4514 // applications that may have overridden the method. 4515 startActivityForResult(intent, -1); 4516 } 4517 } 4518 4519 /** 4520 * Same as {@link #startActivities(Intent[], Bundle)} with no options 4521 * specified. 4522 * 4523 * @param intents The intents to start. 4524 * 4525 * @throws android.content.ActivityNotFoundException 4526 * 4527 * @see {@link #startActivities(Intent[], Bundle)} 4528 * @see #startActivityForResult 4529 */ 4530 @Override 4531 public void startActivities(Intent[] intents) { 4532 startActivities(intents, null); 4533 } 4534 4535 /** 4536 * Launch a new activity. You will not receive any information about when 4537 * the activity exits. This implementation overrides the base version, 4538 * providing information about 4539 * the activity performing the launch. Because of this additional 4540 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4541 * required; if not specified, the new activity will be added to the 4542 * task of the caller. 4543 * 4544 * <p>This method throws {@link android.content.ActivityNotFoundException} 4545 * if there was no Activity found to run the given Intent. 4546 * 4547 * @param intents The intents to start. 4548 * @param options Additional options for how the Activity should be started. 4549 * See {@link android.content.Context#startActivity(Intent, Bundle) 4550 * Context.startActivity(Intent, Bundle)} for more details. 4551 * 4552 * @throws android.content.ActivityNotFoundException 4553 * 4554 * @see {@link #startActivities(Intent[])} 4555 * @see #startActivityForResult 4556 */ 4557 @Override 4558 public void startActivities(Intent[] intents, @Nullable Bundle options) { 4559 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 4560 mToken, this, intents, options); 4561 } 4562 4563 /** 4564 * Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 4565 * with no options. 4566 * 4567 * @param intent The IntentSender to launch. 4568 * @param fillInIntent If non-null, this will be provided as the 4569 * intent parameter to {@link IntentSender#sendIntent}. 4570 * @param flagsMask Intent flags in the original IntentSender that you 4571 * would like to change. 4572 * @param flagsValues Desired values for any bits set in 4573 * <var>flagsMask</var> 4574 * @param extraFlags Always set to 0. 4575 */ 4576 public void startIntentSender(IntentSender intent, 4577 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4578 throws IntentSender.SendIntentException { 4579 startIntentSender(intent, fillInIntent, flagsMask, flagsValues, 4580 extraFlags, null); 4581 } 4582 4583 /** 4584 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 4585 * to start; see 4586 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)} 4587 * for more information. 4588 * 4589 * @param intent The IntentSender to launch. 4590 * @param fillInIntent If non-null, this will be provided as the 4591 * intent parameter to {@link IntentSender#sendIntent}. 4592 * @param flagsMask Intent flags in the original IntentSender that you 4593 * would like to change. 4594 * @param flagsValues Desired values for any bits set in 4595 * <var>flagsMask</var> 4596 * @param extraFlags Always set to 0. 4597 * @param options Additional options for how the Activity should be started. 4598 * See {@link android.content.Context#startActivity(Intent, Bundle) 4599 * Context.startActivity(Intent, Bundle)} for more details. If options 4600 * have also been supplied by the IntentSender, options given here will 4601 * override any that conflict with those given by the IntentSender. 4602 */ 4603 public void startIntentSender(IntentSender intent, 4604 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4605 Bundle options) throws IntentSender.SendIntentException { 4606 if (options != null) { 4607 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4608 flagsValues, extraFlags, options); 4609 } else { 4610 // Note we want to go through this call for compatibility with 4611 // applications that may have overridden the method. 4612 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4613 flagsValues, extraFlags); 4614 } 4615 } 4616 4617 /** 4618 * Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)} 4619 * with no options. 4620 * 4621 * @param intent The intent to start. 4622 * @param requestCode If >= 0, this code will be returned in 4623 * onActivityResult() when the activity exits, as described in 4624 * {@link #startActivityForResult}. 4625 * 4626 * @return If a new activity was launched then true is returned; otherwise 4627 * false is returned and you must handle the Intent yourself. 4628 * 4629 * @see #startActivity 4630 * @see #startActivityForResult 4631 */ 4632 public boolean startActivityIfNeeded(@RequiresPermission @NonNull Intent intent, 4633 int requestCode) { 4634 return startActivityIfNeeded(intent, requestCode, null); 4635 } 4636 4637 /** 4638 * A special variation to launch an activity only if a new activity 4639 * instance is needed to handle the given Intent. In other words, this is 4640 * just like {@link #startActivityForResult(Intent, int)} except: if you are 4641 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 4642 * singleTask or singleTop 4643 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 4644 * and the activity 4645 * that handles <var>intent</var> is the same as your currently running 4646 * activity, then a new instance is not needed. In this case, instead of 4647 * the normal behavior of calling {@link #onNewIntent} this function will 4648 * return and you can handle the Intent yourself. 4649 * 4650 * <p>This function can only be called from a top-level activity; if it is 4651 * called from a child activity, a runtime exception will be thrown. 4652 * 4653 * @param intent The intent to start. 4654 * @param requestCode If >= 0, this code will be returned in 4655 * onActivityResult() when the activity exits, as described in 4656 * {@link #startActivityForResult}. 4657 * @param options Additional options for how the Activity should be started. 4658 * See {@link android.content.Context#startActivity(Intent, Bundle) 4659 * Context.startActivity(Intent, Bundle)} for more details. 4660 * 4661 * @return If a new activity was launched then true is returned; otherwise 4662 * false is returned and you must handle the Intent yourself. 4663 * 4664 * @see #startActivity 4665 * @see #startActivityForResult 4666 */ 4667 public boolean startActivityIfNeeded(@RequiresPermission @NonNull Intent intent, 4668 int requestCode, @Nullable Bundle options) { 4669 if (mParent == null) { 4670 int result = ActivityManager.START_RETURN_INTENT_TO_CALLER; 4671 try { 4672 Uri referrer = onProvideReferrer(); 4673 if (referrer != null) { 4674 intent.putExtra(Intent.EXTRA_REFERRER, referrer); 4675 } 4676 intent.migrateExtraStreamToClipData(); 4677 intent.prepareToLeaveProcess(this); 4678 result = ActivityManagerNative.getDefault() 4679 .startActivity(mMainThread.getApplicationThread(), getBasePackageName(), 4680 intent, intent.resolveTypeIfNeeded(getContentResolver()), mToken, 4681 mEmbeddedID, requestCode, ActivityManager.START_FLAG_ONLY_IF_NEEDED, 4682 null, options); 4683 } catch (RemoteException e) { 4684 // Empty 4685 } 4686 4687 Instrumentation.checkStartActivityResult(result, intent); 4688 4689 if (requestCode >= 0) { 4690 // If this start is requesting a result, we can avoid making 4691 // the activity visible until the result is received. Setting 4692 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4693 // activity hidden during this time, to avoid flickering. 4694 // This can only be done when a result is requested because 4695 // that guarantees we will get information back when the 4696 // activity is finished, no matter what happens to it. 4697 mStartedActivity = true; 4698 } 4699 return result != ActivityManager.START_RETURN_INTENT_TO_CALLER; 4700 } 4701 4702 throw new UnsupportedOperationException( 4703 "startActivityIfNeeded can only be called from a top-level activity"); 4704 } 4705 4706 /** 4707 * Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with 4708 * no options. 4709 * 4710 * @param intent The intent to dispatch to the next activity. For 4711 * correct behavior, this must be the same as the Intent that started 4712 * your own activity; the only changes you can make are to the extras 4713 * inside of it. 4714 * 4715 * @return Returns a boolean indicating whether there was another Activity 4716 * to start: true if there was a next activity to start, false if there 4717 * wasn't. In general, if true is returned you will then want to call 4718 * finish() on yourself. 4719 */ 4720 public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent) { 4721 return startNextMatchingActivity(intent, null); 4722 } 4723 4724 /** 4725 * Special version of starting an activity, for use when you are replacing 4726 * other activity components. You can use this to hand the Intent off 4727 * to the next Activity that can handle it. You typically call this in 4728 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 4729 * 4730 * @param intent The intent to dispatch to the next activity. For 4731 * correct behavior, this must be the same as the Intent that started 4732 * your own activity; the only changes you can make are to the extras 4733 * inside of it. 4734 * @param options Additional options for how the Activity should be started. 4735 * See {@link android.content.Context#startActivity(Intent, Bundle) 4736 * Context.startActivity(Intent, Bundle)} for more details. 4737 * 4738 * @return Returns a boolean indicating whether there was another Activity 4739 * to start: true if there was a next activity to start, false if there 4740 * wasn't. In general, if true is returned you will then want to call 4741 * finish() on yourself. 4742 */ 4743 public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent, 4744 @Nullable Bundle options) { 4745 if (mParent == null) { 4746 try { 4747 intent.migrateExtraStreamToClipData(); 4748 intent.prepareToLeaveProcess(this); 4749 return ActivityManagerNative.getDefault() 4750 .startNextMatchingActivity(mToken, intent, options); 4751 } catch (RemoteException e) { 4752 // Empty 4753 } 4754 return false; 4755 } 4756 4757 throw new UnsupportedOperationException( 4758 "startNextMatchingActivity can only be called from a top-level activity"); 4759 } 4760 4761 /** 4762 * Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)} 4763 * with no options. 4764 * 4765 * @param child The activity making the call. 4766 * @param intent The intent to start. 4767 * @param requestCode Reply request code. < 0 if reply is not requested. 4768 * 4769 * @throws android.content.ActivityNotFoundException 4770 * 4771 * @see #startActivity 4772 * @see #startActivityForResult 4773 */ 4774 public void startActivityFromChild(@NonNull Activity child, @RequiresPermission Intent intent, 4775 int requestCode) { 4776 startActivityFromChild(child, intent, requestCode, null); 4777 } 4778 4779 /** 4780 * This is called when a child activity of this one calls its 4781 * {@link #startActivity} or {@link #startActivityForResult} method. 4782 * 4783 * <p>This method throws {@link android.content.ActivityNotFoundException} 4784 * if there was no Activity found to run the given Intent. 4785 * 4786 * @param child The activity making the call. 4787 * @param intent The intent to start. 4788 * @param requestCode Reply request code. < 0 if reply is not requested. 4789 * @param options Additional options for how the Activity should be started. 4790 * See {@link android.content.Context#startActivity(Intent, Bundle) 4791 * Context.startActivity(Intent, Bundle)} for more details. 4792 * 4793 * @throws android.content.ActivityNotFoundException 4794 * 4795 * @see #startActivity 4796 * @see #startActivityForResult 4797 */ 4798 public void startActivityFromChild(@NonNull Activity child, @RequiresPermission Intent intent, 4799 int requestCode, @Nullable Bundle options) { 4800 Instrumentation.ActivityResult ar = 4801 mInstrumentation.execStartActivity( 4802 this, mMainThread.getApplicationThread(), mToken, child, 4803 intent, requestCode, options); 4804 if (ar != null) { 4805 mMainThread.sendActivityResult( 4806 mToken, child.mEmbeddedID, requestCode, 4807 ar.getResultCode(), ar.getResultData()); 4808 } 4809 cancelInputsAndStartExitTransition(options); 4810 } 4811 4812 /** 4813 * Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)} 4814 * with no options. 4815 * 4816 * @param fragment The fragment making the call. 4817 * @param intent The intent to start. 4818 * @param requestCode Reply request code. < 0 if reply is not requested. 4819 * 4820 * @throws android.content.ActivityNotFoundException 4821 * 4822 * @see Fragment#startActivity 4823 * @see Fragment#startActivityForResult 4824 */ 4825 public void startActivityFromFragment(@NonNull Fragment fragment, 4826 @RequiresPermission Intent intent, int requestCode) { 4827 startActivityFromFragment(fragment, intent, requestCode, null); 4828 } 4829 4830 /** 4831 * This is called when a Fragment in this activity calls its 4832 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 4833 * method. 4834 * 4835 * <p>This method throws {@link android.content.ActivityNotFoundException} 4836 * if there was no Activity found to run the given Intent. 4837 * 4838 * @param fragment The fragment making the call. 4839 * @param intent The intent to start. 4840 * @param requestCode Reply request code. < 0 if reply is not requested. 4841 * @param options Additional options for how the Activity should be started. 4842 * See {@link android.content.Context#startActivity(Intent, Bundle) 4843 * Context.startActivity(Intent, Bundle)} for more details. 4844 * 4845 * @throws android.content.ActivityNotFoundException 4846 * 4847 * @see Fragment#startActivity 4848 * @see Fragment#startActivityForResult 4849 */ 4850 public void startActivityFromFragment(@NonNull Fragment fragment, 4851 @RequiresPermission Intent intent, int requestCode, @Nullable Bundle options) { 4852 startActivityForResult(fragment.mWho, intent, requestCode, options); 4853 } 4854 4855 /** 4856 * @hide 4857 */ 4858 @Override 4859 public void startActivityForResult( 4860 String who, Intent intent, int requestCode, @Nullable Bundle options) { 4861 Uri referrer = onProvideReferrer(); 4862 if (referrer != null) { 4863 intent.putExtra(Intent.EXTRA_REFERRER, referrer); 4864 } 4865 Instrumentation.ActivityResult ar = 4866 mInstrumentation.execStartActivity( 4867 this, mMainThread.getApplicationThread(), mToken, who, 4868 intent, requestCode, options); 4869 if (ar != null) { 4870 mMainThread.sendActivityResult( 4871 mToken, who, requestCode, 4872 ar.getResultCode(), ar.getResultData()); 4873 } 4874 cancelInputsAndStartExitTransition(options); 4875 } 4876 4877 /** 4878 * @hide 4879 */ 4880 @Override 4881 public boolean canStartActivityForResult() { 4882 return true; 4883 } 4884 4885 /** 4886 * Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender, 4887 * int, Intent, int, int, int, Bundle)} with no options. 4888 */ 4889 public void startIntentSenderFromChild(Activity child, IntentSender intent, 4890 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 4891 int extraFlags) 4892 throws IntentSender.SendIntentException { 4893 startIntentSenderFromChild(child, intent, requestCode, fillInIntent, 4894 flagsMask, flagsValues, extraFlags, null); 4895 } 4896 4897 /** 4898 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 4899 * taking a IntentSender; see 4900 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 4901 * for more information. 4902 */ 4903 public void startIntentSenderFromChild(Activity child, IntentSender intent, 4904 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 4905 int extraFlags, @Nullable Bundle options) 4906 throws IntentSender.SendIntentException { 4907 startIntentSenderForResultInner(intent, child.mEmbeddedID, requestCode, fillInIntent, 4908 flagsMask, flagsValues, options); 4909 } 4910 4911 /** 4912 * Like {@link #startIntentSenderFromChild}, but taking a Fragment; see 4913 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 4914 * for more information. 4915 * 4916 * @hide 4917 */ 4918 public void startIntentSenderFromChildFragment(Fragment child, IntentSender intent, 4919 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 4920 int extraFlags, @Nullable Bundle options) 4921 throws IntentSender.SendIntentException { 4922 startIntentSenderForResultInner(intent, child.mWho, requestCode, fillInIntent, 4923 flagsMask, flagsValues, options); 4924 } 4925 4926 /** 4927 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 4928 * or {@link #finish} to specify an explicit transition animation to 4929 * perform next. 4930 * 4931 * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative 4932 * to using this with starting activities is to supply the desired animation 4933 * information through a {@link ActivityOptions} bundle to 4934 * {@link #startActivity(Intent, Bundle) or a related function. This allows 4935 * you to specify a custom animation even when starting an activity from 4936 * outside the context of the current top activity. 4937 * 4938 * @param enterAnim A resource ID of the animation resource to use for 4939 * the incoming activity. Use 0 for no animation. 4940 * @param exitAnim A resource ID of the animation resource to use for 4941 * the outgoing activity. Use 0 for no animation. 4942 */ 4943 public void overridePendingTransition(int enterAnim, int exitAnim) { 4944 try { 4945 ActivityManagerNative.getDefault().overridePendingTransition( 4946 mToken, getPackageName(), enterAnim, exitAnim); 4947 } catch (RemoteException e) { 4948 } 4949 } 4950 4951 /** 4952 * Call this to set the result that your activity will return to its 4953 * caller. 4954 * 4955 * @param resultCode The result code to propagate back to the originating 4956 * activity, often RESULT_CANCELED or RESULT_OK 4957 * 4958 * @see #RESULT_CANCELED 4959 * @see #RESULT_OK 4960 * @see #RESULT_FIRST_USER 4961 * @see #setResult(int, Intent) 4962 */ 4963 public final void setResult(int resultCode) { 4964 synchronized (this) { 4965 mResultCode = resultCode; 4966 mResultData = null; 4967 } 4968 } 4969 4970 /** 4971 * Call this to set the result that your activity will return to its 4972 * caller. 4973 * 4974 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 4975 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 4976 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 4977 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 4978 * Activity receiving the result access to the specific URIs in the Intent. 4979 * Access will remain until the Activity has finished (it will remain across the hosting 4980 * process being killed and other temporary destruction) and will be added 4981 * to any existing set of URI permissions it already holds. 4982 * 4983 * @param resultCode The result code to propagate back to the originating 4984 * activity, often RESULT_CANCELED or RESULT_OK 4985 * @param data The data to propagate back to the originating activity. 4986 * 4987 * @see #RESULT_CANCELED 4988 * @see #RESULT_OK 4989 * @see #RESULT_FIRST_USER 4990 * @see #setResult(int) 4991 */ 4992 public final void setResult(int resultCode, Intent data) { 4993 synchronized (this) { 4994 mResultCode = resultCode; 4995 mResultData = data; 4996 } 4997 } 4998 4999 /** 5000 * Return information about who launched this activity. If the launching Intent 5001 * contains an {@link android.content.Intent#EXTRA_REFERRER Intent.EXTRA_REFERRER}, 5002 * that will be returned as-is; otherwise, if known, an 5003 * {@link Intent#URI_ANDROID_APP_SCHEME android-app:} referrer URI containing the 5004 * package name that started the Intent will be returned. This may return null if no 5005 * referrer can be identified -- it is neither explicitly specified, nor is it known which 5006 * application package was involved. 5007 * 5008 * <p>If called while inside the handling of {@link #onNewIntent}, this function will 5009 * return the referrer that submitted that new intent to the activity. Otherwise, it 5010 * always returns the referrer of the original Intent.</p> 5011 * 5012 * <p>Note that this is <em>not</em> a security feature -- you can not trust the 5013 * referrer information, applications can spoof it.</p> 5014 */ 5015 @Nullable 5016 public Uri getReferrer() { 5017 Intent intent = getIntent(); 5018 Uri referrer = intent.getParcelableExtra(Intent.EXTRA_REFERRER); 5019 if (referrer != null) { 5020 return referrer; 5021 } 5022 String referrerName = intent.getStringExtra(Intent.EXTRA_REFERRER_NAME); 5023 if (referrerName != null) { 5024 return Uri.parse(referrerName); 5025 } 5026 if (mReferrer != null) { 5027 return new Uri.Builder().scheme("android-app").authority(mReferrer).build(); 5028 } 5029 return null; 5030 } 5031 5032 /** 5033 * Override to generate the desired referrer for the content currently being shown 5034 * by the app. The default implementation returns null, meaning the referrer will simply 5035 * be the android-app: of the package name of this activity. Return a non-null Uri to 5036 * have that supplied as the {@link Intent#EXTRA_REFERRER} of any activities started from it. 5037 */ 5038 public Uri onProvideReferrer() { 5039 return null; 5040 } 5041 5042 /** 5043 * Return the name of the package that invoked this activity. This is who 5044 * the data in {@link #setResult setResult()} will be sent to. You can 5045 * use this information to validate that the recipient is allowed to 5046 * receive the data. 5047 * 5048 * <p class="note">Note: if the calling activity is not expecting a result (that is it 5049 * did not use the {@link #startActivityForResult} 5050 * form that includes a request code), then the calling package will be 5051 * null.</p> 5052 * 5053 * <p class="note">Note: prior to {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, 5054 * the result from this method was unstable. If the process hosting the calling 5055 * package was no longer running, it would return null instead of the proper package 5056 * name. You can use {@link #getCallingActivity()} and retrieve the package name 5057 * from that instead.</p> 5058 * 5059 * @return The package of the activity that will receive your 5060 * reply, or null if none. 5061 */ 5062 @Nullable 5063 public String getCallingPackage() { 5064 try { 5065 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 5066 } catch (RemoteException e) { 5067 return null; 5068 } 5069 } 5070 5071 /** 5072 * Return the name of the activity that invoked this activity. This is 5073 * who the data in {@link #setResult setResult()} will be sent to. You 5074 * can use this information to validate that the recipient is allowed to 5075 * receive the data. 5076 * 5077 * <p class="note">Note: if the calling activity is not expecting a result (that is it 5078 * did not use the {@link #startActivityForResult} 5079 * form that includes a request code), then the calling package will be 5080 * null. 5081 * 5082 * @return The ComponentName of the activity that will receive your 5083 * reply, or null if none. 5084 */ 5085 @Nullable 5086 public ComponentName getCallingActivity() { 5087 try { 5088 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 5089 } catch (RemoteException e) { 5090 return null; 5091 } 5092 } 5093 5094 /** 5095 * Control whether this activity's main window is visible. This is intended 5096 * only for the special case of an activity that is not going to show a 5097 * UI itself, but can't just finish prior to onResume() because it needs 5098 * to wait for a service binding or such. Setting this to false allows 5099 * you to prevent your UI from being shown during that time. 5100 * 5101 * <p>The default value for this is taken from the 5102 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 5103 */ 5104 public void setVisible(boolean visible) { 5105 if (mVisibleFromClient != visible) { 5106 mVisibleFromClient = visible; 5107 if (mVisibleFromServer) { 5108 if (visible) makeVisible(); 5109 else mDecor.setVisibility(View.INVISIBLE); 5110 } 5111 } 5112 } 5113 5114 void makeVisible() { 5115 if (!mWindowAdded) { 5116 ViewManager wm = getWindowManager(); 5117 wm.addView(mDecor, getWindow().getAttributes()); 5118 mWindowAdded = true; 5119 } 5120 mDecor.setVisibility(View.VISIBLE); 5121 } 5122 5123 /** 5124 * Check to see whether this activity is in the process of finishing, 5125 * either because you called {@link #finish} on it or someone else 5126 * has requested that it finished. This is often used in 5127 * {@link #onPause} to determine whether the activity is simply pausing or 5128 * completely finishing. 5129 * 5130 * @return If the activity is finishing, returns true; else returns false. 5131 * 5132 * @see #finish 5133 */ 5134 public boolean isFinishing() { 5135 return mFinished; 5136 } 5137 5138 /** 5139 * Returns true if the final {@link #onDestroy()} call has been made 5140 * on the Activity, so this instance is now dead. 5141 */ 5142 public boolean isDestroyed() { 5143 return mDestroyed; 5144 } 5145 5146 /** 5147 * Check to see whether this activity is in the process of being destroyed in order to be 5148 * recreated with a new configuration. This is often used in 5149 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 5150 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 5151 * 5152 * @return If the activity is being torn down in order to be recreated with a new configuration, 5153 * returns true; else returns false. 5154 */ 5155 public boolean isChangingConfigurations() { 5156 return mChangingConfigurations; 5157 } 5158 5159 /** 5160 * Cause this Activity to be recreated with a new instance. This results 5161 * in essentially the same flow as when the Activity is created due to 5162 * a configuration change -- the current instance will go through its 5163 * lifecycle to {@link #onDestroy} and a new instance then created after it. 5164 */ 5165 public void recreate() { 5166 if (mParent != null) { 5167 throw new IllegalStateException("Can only be called on top-level activity"); 5168 } 5169 if (Looper.myLooper() != mMainThread.getLooper()) { 5170 throw new IllegalStateException("Must be called from main thread"); 5171 } 5172 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, null, false, 5173 false /* preserveWindow */); 5174 } 5175 5176 /** 5177 * Finishes the current activity and specifies whether to remove the task associated with this 5178 * activity. 5179 */ 5180 private void finish(int finishTask) { 5181 if (mParent == null) { 5182 int resultCode; 5183 Intent resultData; 5184 synchronized (this) { 5185 resultCode = mResultCode; 5186 resultData = mResultData; 5187 } 5188 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 5189 try { 5190 if (resultData != null) { 5191 resultData.prepareToLeaveProcess(this); 5192 } 5193 if (ActivityManagerNative.getDefault() 5194 .finishActivity(mToken, resultCode, resultData, finishTask)) { 5195 mFinished = true; 5196 } 5197 } catch (RemoteException e) { 5198 // Empty 5199 } 5200 } else { 5201 mParent.finishFromChild(this); 5202 } 5203 } 5204 5205 /** 5206 * Call this when your activity is done and should be closed. The 5207 * ActivityResult is propagated back to whoever launched you via 5208 * onActivityResult(). 5209 */ 5210 public void finish() { 5211 finish(DONT_FINISH_TASK_WITH_ACTIVITY); 5212 } 5213 5214 /** 5215 * Finish this activity as well as all activities immediately below it 5216 * in the current task that have the same affinity. This is typically 5217 * used when an application can be launched on to another task (such as 5218 * from an ACTION_VIEW of a content type it understands) and the user 5219 * has used the up navigation to switch out of the current task and in 5220 * to its own task. In this case, if the user has navigated down into 5221 * any other activities of the second application, all of those should 5222 * be removed from the original task as part of the task switch. 5223 * 5224 * <p>Note that this finish does <em>not</em> allow you to deliver results 5225 * to the previous activity, and an exception will be thrown if you are trying 5226 * to do so.</p> 5227 */ 5228 public void finishAffinity() { 5229 if (mParent != null) { 5230 throw new IllegalStateException("Can not be called from an embedded activity"); 5231 } 5232 if (mResultCode != RESULT_CANCELED || mResultData != null) { 5233 throw new IllegalStateException("Can not be called to deliver a result"); 5234 } 5235 try { 5236 if (ActivityManagerNative.getDefault().finishActivityAffinity(mToken)) { 5237 mFinished = true; 5238 } 5239 } catch (RemoteException e) { 5240 // Empty 5241 } 5242 } 5243 5244 /** 5245 * This is called when a child activity of this one calls its 5246 * {@link #finish} method. The default implementation simply calls 5247 * finish() on this activity (the parent), finishing the entire group. 5248 * 5249 * @param child The activity making the call. 5250 * 5251 * @see #finish 5252 */ 5253 public void finishFromChild(Activity child) { 5254 finish(); 5255 } 5256 5257 /** 5258 * Reverses the Activity Scene entry Transition and triggers the calling Activity 5259 * to reverse its exit Transition. When the exit Transition completes, 5260 * {@link #finish()} is called. If no entry Transition was used, finish() is called 5261 * immediately and the Activity exit Transition is run. 5262 * @see android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, android.util.Pair[]) 5263 */ 5264 public void finishAfterTransition() { 5265 if (!mActivityTransitionState.startExitBackTransition(this)) { 5266 finish(); 5267 } 5268 } 5269 5270 /** 5271 * Force finish another activity that you had previously started with 5272 * {@link #startActivityForResult}. 5273 * 5274 * @param requestCode The request code of the activity that you had 5275 * given to startActivityForResult(). If there are multiple 5276 * activities started with this request code, they 5277 * will all be finished. 5278 */ 5279 public void finishActivity(int requestCode) { 5280 if (mParent == null) { 5281 try { 5282 ActivityManagerNative.getDefault() 5283 .finishSubActivity(mToken, mEmbeddedID, requestCode); 5284 } catch (RemoteException e) { 5285 // Empty 5286 } 5287 } else { 5288 mParent.finishActivityFromChild(this, requestCode); 5289 } 5290 } 5291 5292 /** 5293 * This is called when a child activity of this one calls its 5294 * finishActivity(). 5295 * 5296 * @param child The activity making the call. 5297 * @param requestCode Request code that had been used to start the 5298 * activity. 5299 */ 5300 public void finishActivityFromChild(@NonNull Activity child, int requestCode) { 5301 try { 5302 ActivityManagerNative.getDefault() 5303 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 5304 } catch (RemoteException e) { 5305 // Empty 5306 } 5307 } 5308 5309 /** 5310 * Call this when your activity is done and should be closed and the task should be completely 5311 * removed as a part of finishing the root activity of the task. 5312 */ 5313 public void finishAndRemoveTask() { 5314 finish(FINISH_TASK_WITH_ROOT_ACTIVITY); 5315 } 5316 5317 /** 5318 * Ask that the local app instance of this activity be released to free up its memory. 5319 * This is asking for the activity to be destroyed, but does <b>not</b> finish the activity -- 5320 * a new instance of the activity will later be re-created if needed due to the user 5321 * navigating back to it. 5322 * 5323 * @return Returns true if the activity was in a state that it has started the process 5324 * of destroying its current instance; returns false if for any reason this could not 5325 * be done: it is currently visible to the user, it is already being destroyed, it is 5326 * being finished, it hasn't yet saved its state, etc. 5327 */ 5328 public boolean releaseInstance() { 5329 try { 5330 return ActivityManagerNative.getDefault().releaseActivityInstance(mToken); 5331 } catch (RemoteException e) { 5332 // Empty 5333 } 5334 return false; 5335 } 5336 5337 /** 5338 * Called when an activity you launched exits, giving you the requestCode 5339 * you started it with, the resultCode it returned, and any additional 5340 * data from it. The <var>resultCode</var> will be 5341 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 5342 * didn't return any result, or crashed during its operation. 5343 * 5344 * <p>You will receive this call immediately before onResume() when your 5345 * activity is re-starting. 5346 * 5347 * <p>This method is never invoked if your activity sets 5348 * {@link android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 5349 * <code>true</code>. 5350 * 5351 * @param requestCode The integer request code originally supplied to 5352 * startActivityForResult(), allowing you to identify who this 5353 * result came from. 5354 * @param resultCode The integer result code returned by the child activity 5355 * through its setResult(). 5356 * @param data An Intent, which can return result data to the caller 5357 * (various data can be attached to Intent "extras"). 5358 * 5359 * @see #startActivityForResult 5360 * @see #createPendingResult 5361 * @see #setResult(int) 5362 */ 5363 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 5364 } 5365 5366 /** 5367 * Called when an activity you launched with an activity transition exposes this 5368 * Activity through a returning activity transition, giving you the resultCode 5369 * and any additional data from it. This method will only be called if the activity 5370 * set a result code other than {@link #RESULT_CANCELED} and it supports activity 5371 * transitions with {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 5372 * 5373 * <p>The purpose of this function is to let the called Activity send a hint about 5374 * its state so that this underlying Activity can prepare to be exposed. A call to 5375 * this method does not guarantee that the called Activity has or will be exiting soon. 5376 * It only indicates that it will expose this Activity's Window and it has 5377 * some data to pass to prepare it.</p> 5378 * 5379 * @param resultCode The integer result code returned by the child activity 5380 * through its setResult(). 5381 * @param data An Intent, which can return result data to the caller 5382 * (various data can be attached to Intent "extras"). 5383 */ 5384 public void onActivityReenter(int resultCode, Intent data) { 5385 } 5386 5387 /** 5388 * Create a new PendingIntent object which you can hand to others 5389 * for them to use to send result data back to your 5390 * {@link #onActivityResult} callback. The created object will be either 5391 * one-shot (becoming invalid after a result is sent back) or multiple 5392 * (allowing any number of results to be sent through it). 5393 * 5394 * @param requestCode Private request code for the sender that will be 5395 * associated with the result data when it is returned. The sender can not 5396 * modify this value, allowing you to identify incoming results. 5397 * @param data Default data to supply in the result, which may be modified 5398 * by the sender. 5399 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 5400 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 5401 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 5402 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 5403 * or any of the flags as supported by 5404 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 5405 * of the intent that can be supplied when the actual send happens. 5406 * 5407 * @return Returns an existing or new PendingIntent matching the given 5408 * parameters. May return null only if 5409 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 5410 * supplied. 5411 * 5412 * @see PendingIntent 5413 */ 5414 public PendingIntent createPendingResult(int requestCode, @NonNull Intent data, 5415 @PendingIntent.Flags int flags) { 5416 String packageName = getPackageName(); 5417 try { 5418 data.prepareToLeaveProcess(this); 5419 IIntentSender target = 5420 ActivityManagerNative.getDefault().getIntentSender( 5421 ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 5422 mParent == null ? mToken : mParent.mToken, 5423 mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null, 5424 UserHandle.myUserId()); 5425 return target != null ? new PendingIntent(target) : null; 5426 } catch (RemoteException e) { 5427 // Empty 5428 } 5429 return null; 5430 } 5431 5432 /** 5433 * Change the desired orientation of this activity. If the activity 5434 * is currently in the foreground or otherwise impacting the screen 5435 * orientation, the screen will immediately be changed (possibly causing 5436 * the activity to be restarted). Otherwise, this will be used the next 5437 * time the activity is visible. 5438 * 5439 * @param requestedOrientation An orientation constant as used in 5440 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 5441 */ 5442 public void setRequestedOrientation(@ActivityInfo.ScreenOrientation int requestedOrientation) { 5443 if (mParent == null) { 5444 try { 5445 ActivityManagerNative.getDefault().setRequestedOrientation( 5446 mToken, requestedOrientation); 5447 } catch (RemoteException e) { 5448 // Empty 5449 } 5450 } else { 5451 mParent.setRequestedOrientation(requestedOrientation); 5452 } 5453 } 5454 5455 /** 5456 * Return the current requested orientation of the activity. This will 5457 * either be the orientation requested in its component's manifest, or 5458 * the last requested orientation given to 5459 * {@link #setRequestedOrientation(int)}. 5460 * 5461 * @return Returns an orientation constant as used in 5462 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 5463 */ 5464 @ActivityInfo.ScreenOrientation 5465 public int getRequestedOrientation() { 5466 if (mParent == null) { 5467 try { 5468 return ActivityManagerNative.getDefault() 5469 .getRequestedOrientation(mToken); 5470 } catch (RemoteException e) { 5471 // Empty 5472 } 5473 } else { 5474 return mParent.getRequestedOrientation(); 5475 } 5476 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 5477 } 5478 5479 /** 5480 * Return the identifier of the task this activity is in. This identifier 5481 * will remain the same for the lifetime of the activity. 5482 * 5483 * @return Task identifier, an opaque integer. 5484 */ 5485 public int getTaskId() { 5486 try { 5487 return ActivityManagerNative.getDefault() 5488 .getTaskForActivity(mToken, false); 5489 } catch (RemoteException e) { 5490 return -1; 5491 } 5492 } 5493 5494 /** 5495 * Return whether this activity is the root of a task. The root is the 5496 * first activity in a task. 5497 * 5498 * @return True if this is the root activity, else false. 5499 */ 5500 public boolean isTaskRoot() { 5501 try { 5502 return ActivityManagerNative.getDefault().getTaskForActivity(mToken, true) >= 0; 5503 } catch (RemoteException e) { 5504 return false; 5505 } 5506 } 5507 5508 /** 5509 * Move the task containing this activity to the back of the activity 5510 * stack. The activity's order within the task is unchanged. 5511 * 5512 * @param nonRoot If false then this only works if the activity is the root 5513 * of a task; if true it will work for any activity in 5514 * a task. 5515 * 5516 * @return If the task was moved (or it was already at the 5517 * back) true is returned, else false. 5518 */ 5519 public boolean moveTaskToBack(boolean nonRoot) { 5520 try { 5521 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 5522 mToken, nonRoot); 5523 } catch (RemoteException e) { 5524 // Empty 5525 } 5526 return false; 5527 } 5528 5529 /** 5530 * Returns class name for this activity with the package prefix removed. 5531 * This is the default name used to read and write settings. 5532 * 5533 * @return The local class name. 5534 */ 5535 @NonNull 5536 public String getLocalClassName() { 5537 final String pkg = getPackageName(); 5538 final String cls = mComponent.getClassName(); 5539 int packageLen = pkg.length(); 5540 if (!cls.startsWith(pkg) || cls.length() <= packageLen 5541 || cls.charAt(packageLen) != '.') { 5542 return cls; 5543 } 5544 return cls.substring(packageLen+1); 5545 } 5546 5547 /** 5548 * Returns complete component name of this activity. 5549 * 5550 * @return Returns the complete component name for this activity 5551 */ 5552 public ComponentName getComponentName() 5553 { 5554 return mComponent; 5555 } 5556 5557 /** 5558 * Retrieve a {@link SharedPreferences} object for accessing preferences 5559 * that are private to this activity. This simply calls the underlying 5560 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 5561 * class name as the preferences name. 5562 * 5563 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 5564 * operation. 5565 * 5566 * @return Returns the single SharedPreferences instance that can be used 5567 * to retrieve and modify the preference values. 5568 */ 5569 public SharedPreferences getPreferences(int mode) { 5570 return getSharedPreferences(getLocalClassName(), mode); 5571 } 5572 5573 private void ensureSearchManager() { 5574 if (mSearchManager != null) { 5575 return; 5576 } 5577 5578 mSearchManager = new SearchManager(this, null); 5579 } 5580 5581 @Override 5582 public Object getSystemService(@ServiceName @NonNull String name) { 5583 if (getBaseContext() == null) { 5584 throw new IllegalStateException( 5585 "System services not available to Activities before onCreate()"); 5586 } 5587 5588 if (WINDOW_SERVICE.equals(name)) { 5589 return mWindowManager; 5590 } else if (SEARCH_SERVICE.equals(name)) { 5591 ensureSearchManager(); 5592 return mSearchManager; 5593 } 5594 return super.getSystemService(name); 5595 } 5596 5597 /** 5598 * Change the title associated with this activity. If this is a 5599 * top-level activity, the title for its window will change. If it 5600 * is an embedded activity, the parent can do whatever it wants 5601 * with it. 5602 */ 5603 public void setTitle(CharSequence title) { 5604 mTitle = title; 5605 onTitleChanged(title, mTitleColor); 5606 5607 if (mParent != null) { 5608 mParent.onChildTitleChanged(this, title); 5609 } 5610 } 5611 5612 /** 5613 * Change the title associated with this activity. If this is a 5614 * top-level activity, the title for its window will change. If it 5615 * is an embedded activity, the parent can do whatever it wants 5616 * with it. 5617 */ 5618 public void setTitle(int titleId) { 5619 setTitle(getText(titleId)); 5620 } 5621 5622 /** 5623 * Change the color of the title associated with this activity. 5624 * <p> 5625 * This method is deprecated starting in API Level 11 and replaced by action 5626 * bar styles. For information on styling the Action Bar, read the <a 5627 * href="{@docRoot} guide/topics/ui/actionbar.html">Action Bar</a> developer 5628 * guide. 5629 * 5630 * @deprecated Use action bar styles instead. 5631 */ 5632 @Deprecated 5633 public void setTitleColor(int textColor) { 5634 mTitleColor = textColor; 5635 onTitleChanged(mTitle, textColor); 5636 } 5637 5638 public final CharSequence getTitle() { 5639 return mTitle; 5640 } 5641 5642 public final int getTitleColor() { 5643 return mTitleColor; 5644 } 5645 5646 protected void onTitleChanged(CharSequence title, int color) { 5647 if (mTitleReady) { 5648 final Window win = getWindow(); 5649 if (win != null) { 5650 win.setTitle(title); 5651 if (color != 0) { 5652 win.setTitleColor(color); 5653 } 5654 } 5655 if (mActionBar != null) { 5656 mActionBar.setWindowTitle(title); 5657 } 5658 } 5659 } 5660 5661 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 5662 } 5663 5664 /** 5665 * Sets information describing the task with this activity for presentation inside the Recents 5666 * System UI. When {@link ActivityManager#getRecentTasks} is called, the activities of each task 5667 * are traversed in order from the topmost activity to the bottommost. The traversal continues 5668 * for each property until a suitable value is found. For each task the taskDescription will be 5669 * returned in {@link android.app.ActivityManager.TaskDescription}. 5670 * 5671 * @see ActivityManager#getRecentTasks 5672 * @see android.app.ActivityManager.TaskDescription 5673 * 5674 * @param taskDescription The TaskDescription properties that describe the task with this activity 5675 */ 5676 public void setTaskDescription(ActivityManager.TaskDescription taskDescription) { 5677 if (mTaskDescription != taskDescription) { 5678 mTaskDescription.copyFrom(taskDescription); 5679 // Scale the icon down to something reasonable if it is provided 5680 if (taskDescription.getIconFilename() == null && taskDescription.getIcon() != null) { 5681 final int size = ActivityManager.getLauncherLargeIconSizeInner(this); 5682 final Bitmap icon = Bitmap.createScaledBitmap(taskDescription.getIcon(), size, size, 5683 true); 5684 mTaskDescription.setIcon(icon); 5685 } 5686 } 5687 try { 5688 ActivityManagerNative.getDefault().setTaskDescription(mToken, mTaskDescription); 5689 } catch (RemoteException e) { 5690 } 5691 } 5692 5693 /** 5694 * Sets the visibility of the progress bar in the title. 5695 * <p> 5696 * In order for the progress bar to be shown, the feature must be requested 5697 * via {@link #requestWindowFeature(int)}. 5698 * 5699 * @param visible Whether to show the progress bars in the title. 5700 * @deprecated No longer supported starting in API 21. 5701 */ 5702 @Deprecated 5703 public final void setProgressBarVisibility(boolean visible) { 5704 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 5705 Window.PROGRESS_VISIBILITY_OFF); 5706 } 5707 5708 /** 5709 * Sets the visibility of the indeterminate progress bar in the title. 5710 * <p> 5711 * In order for the progress bar to be shown, the feature must be requested 5712 * via {@link #requestWindowFeature(int)}. 5713 * 5714 * @param visible Whether to show the progress bars in the title. 5715 * @deprecated No longer supported starting in API 21. 5716 */ 5717 @Deprecated 5718 public final void setProgressBarIndeterminateVisibility(boolean visible) { 5719 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 5720 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 5721 } 5722 5723 /** 5724 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 5725 * is always indeterminate). 5726 * <p> 5727 * In order for the progress bar to be shown, the feature must be requested 5728 * via {@link #requestWindowFeature(int)}. 5729 * 5730 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 5731 * @deprecated No longer supported starting in API 21. 5732 */ 5733 @Deprecated 5734 public final void setProgressBarIndeterminate(boolean indeterminate) { 5735 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 5736 indeterminate ? Window.PROGRESS_INDETERMINATE_ON 5737 : Window.PROGRESS_INDETERMINATE_OFF); 5738 } 5739 5740 /** 5741 * Sets the progress for the progress bars in the title. 5742 * <p> 5743 * In order for the progress bar to be shown, the feature must be requested 5744 * via {@link #requestWindowFeature(int)}. 5745 * 5746 * @param progress The progress for the progress bar. Valid ranges are from 5747 * 0 to 10000 (both inclusive). If 10000 is given, the progress 5748 * bar will be completely filled and will fade out. 5749 * @deprecated No longer supported starting in API 21. 5750 */ 5751 @Deprecated 5752 public final void setProgress(int progress) { 5753 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 5754 } 5755 5756 /** 5757 * Sets the secondary progress for the progress bar in the title. This 5758 * progress is drawn between the primary progress (set via 5759 * {@link #setProgress(int)} and the background. It can be ideal for media 5760 * scenarios such as showing the buffering progress while the default 5761 * progress shows the play progress. 5762 * <p> 5763 * In order for the progress bar to be shown, the feature must be requested 5764 * via {@link #requestWindowFeature(int)}. 5765 * 5766 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 5767 * 0 to 10000 (both inclusive). 5768 * @deprecated No longer supported starting in API 21. 5769 */ 5770 @Deprecated 5771 public final void setSecondaryProgress(int secondaryProgress) { 5772 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 5773 secondaryProgress + Window.PROGRESS_SECONDARY_START); 5774 } 5775 5776 /** 5777 * Suggests an audio stream whose volume should be changed by the hardware 5778 * volume controls. 5779 * <p> 5780 * The suggested audio stream will be tied to the window of this Activity. 5781 * Volume requests which are received while the Activity is in the 5782 * foreground will affect this stream. 5783 * <p> 5784 * It is not guaranteed that the hardware volume controls will always change 5785 * this stream's volume (for example, if a call is in progress, its stream's 5786 * volume may be changed instead). To reset back to the default, use 5787 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 5788 * 5789 * @param streamType The type of the audio stream whose volume should be 5790 * changed by the hardware volume controls. 5791 */ 5792 public final void setVolumeControlStream(int streamType) { 5793 getWindow().setVolumeControlStream(streamType); 5794 } 5795 5796 /** 5797 * Gets the suggested audio stream whose volume should be changed by the 5798 * hardware volume controls. 5799 * 5800 * @return The suggested audio stream type whose volume should be changed by 5801 * the hardware volume controls. 5802 * @see #setVolumeControlStream(int) 5803 */ 5804 public final int getVolumeControlStream() { 5805 return getWindow().getVolumeControlStream(); 5806 } 5807 5808 /** 5809 * Sets a {@link MediaController} to send media keys and volume changes to. 5810 * <p> 5811 * The controller will be tied to the window of this Activity. Media key and 5812 * volume events which are received while the Activity is in the foreground 5813 * will be forwarded to the controller and used to invoke transport controls 5814 * or adjust the volume. This may be used instead of or in addition to 5815 * {@link #setVolumeControlStream} to affect a specific session instead of a 5816 * specific stream. 5817 * <p> 5818 * It is not guaranteed that the hardware volume controls will always change 5819 * this session's volume (for example, if a call is in progress, its 5820 * stream's volume may be changed instead). To reset back to the default use 5821 * null as the controller. 5822 * 5823 * @param controller The controller for the session which should receive 5824 * media keys and volume changes. 5825 */ 5826 public final void setMediaController(MediaController controller) { 5827 getWindow().setMediaController(controller); 5828 } 5829 5830 /** 5831 * Gets the controller which should be receiving media key and volume events 5832 * while this activity is in the foreground. 5833 * 5834 * @return The controller which should receive events. 5835 * @see #setMediaController(android.media.session.MediaController) 5836 */ 5837 public final MediaController getMediaController() { 5838 return getWindow().getMediaController(); 5839 } 5840 5841 /** 5842 * Runs the specified action on the UI thread. If the current thread is the UI 5843 * thread, then the action is executed immediately. If the current thread is 5844 * not the UI thread, the action is posted to the event queue of the UI thread. 5845 * 5846 * @param action the action to run on the UI thread 5847 */ 5848 public final void runOnUiThread(Runnable action) { 5849 if (Thread.currentThread() != mUiThread) { 5850 mHandler.post(action); 5851 } else { 5852 action.run(); 5853 } 5854 } 5855 5856 /** 5857 * Standard implementation of 5858 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 5859 * inflating with the LayoutInflater returned by {@link #getSystemService}. 5860 * This implementation does nothing and is for 5861 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 5862 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 5863 * 5864 * @see android.view.LayoutInflater#createView 5865 * @see android.view.Window#getLayoutInflater 5866 */ 5867 @Nullable 5868 public View onCreateView(String name, Context context, AttributeSet attrs) { 5869 return null; 5870 } 5871 5872 /** 5873 * Standard implementation of 5874 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 5875 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 5876 * This implementation handles <fragment> tags to embed fragments inside 5877 * of the activity. 5878 * 5879 * @see android.view.LayoutInflater#createView 5880 * @see android.view.Window#getLayoutInflater 5881 */ 5882 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 5883 if (!"fragment".equals(name)) { 5884 return onCreateView(name, context, attrs); 5885 } 5886 5887 return mFragments.onCreateView(parent, name, context, attrs); 5888 } 5889 5890 /** 5891 * Print the Activity's state into the given stream. This gets invoked if 5892 * you run "adb shell dumpsys activity <activity_component_name>". 5893 * 5894 * @param prefix Desired prefix to prepend at each line of output. 5895 * @param fd The raw file descriptor that the dump is being sent to. 5896 * @param writer The PrintWriter to which you should dump your state. This will be 5897 * closed for you after you return. 5898 * @param args additional arguments to the dump request. 5899 */ 5900 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 5901 dumpInner(prefix, fd, writer, args); 5902 } 5903 5904 void dumpInner(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 5905 writer.print(prefix); writer.print("Local Activity "); 5906 writer.print(Integer.toHexString(System.identityHashCode(this))); 5907 writer.println(" State:"); 5908 String innerPrefix = prefix + " "; 5909 writer.print(innerPrefix); writer.print("mResumed="); 5910 writer.print(mResumed); writer.print(" mStopped="); 5911 writer.print(mStopped); writer.print(" mFinished="); 5912 writer.println(mFinished); 5913 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 5914 writer.println(mChangingConfigurations); 5915 writer.print(innerPrefix); writer.print("mCurrentConfig="); 5916 writer.println(mCurrentConfig); 5917 5918 mFragments.dumpLoaders(innerPrefix, fd, writer, args); 5919 mFragments.getFragmentManager().dump(innerPrefix, fd, writer, args); 5920 if (mVoiceInteractor != null) { 5921 mVoiceInteractor.dump(innerPrefix, fd, writer, args); 5922 } 5923 5924 if (getWindow() != null && 5925 getWindow().peekDecorView() != null && 5926 getWindow().peekDecorView().getViewRootImpl() != null) { 5927 getWindow().peekDecorView().getViewRootImpl().dump(prefix, fd, writer, args); 5928 } 5929 5930 mHandler.getLooper().dump(new PrintWriterPrinter(writer), prefix); 5931 } 5932 5933 /** 5934 * Bit indicating that this activity is "immersive" and should not be 5935 * interrupted by notifications if possible. 5936 * 5937 * This value is initially set by the manifest property 5938 * <code>android:immersive</code> but may be changed at runtime by 5939 * {@link #setImmersive}. 5940 * 5941 * @see #setImmersive(boolean) 5942 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 5943 */ 5944 public boolean isImmersive() { 5945 try { 5946 return ActivityManagerNative.getDefault().isImmersive(mToken); 5947 } catch (RemoteException e) { 5948 return false; 5949 } 5950 } 5951 5952 /** 5953 * Indication of whether this is the highest level activity in this task. Can be used to 5954 * determine whether an activity launched by this activity was placed in the same task or 5955 * another task. 5956 * 5957 * @return true if this is the topmost, non-finishing activity in its task. 5958 */ 5959 private boolean isTopOfTask() { 5960 if (mToken == null || mWindow == null || !mWindowAdded) { 5961 return false; 5962 } 5963 try { 5964 return ActivityManagerNative.getDefault().isTopOfTask(mToken); 5965 } catch (RemoteException e) { 5966 return false; 5967 } 5968 } 5969 5970 /** 5971 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} to a 5972 * fullscreen opaque Activity. 5973 * <p> 5974 * Call this whenever the background of a translucent Activity has changed to become opaque. 5975 * Doing so will allow the {@link android.view.Surface} of the Activity behind to be released. 5976 * <p> 5977 * This call has no effect on non-translucent activities or on activities with the 5978 * {@link android.R.attr#windowIsFloating} attribute. 5979 * 5980 * @see #convertToTranslucent(android.app.Activity.TranslucentConversionListener, 5981 * ActivityOptions) 5982 * @see TranslucentConversionListener 5983 * 5984 * @hide 5985 */ 5986 @SystemApi 5987 public void convertFromTranslucent() { 5988 try { 5989 mTranslucentCallback = null; 5990 if (ActivityManagerNative.getDefault().convertFromTranslucent(mToken)) { 5991 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, true); 5992 } 5993 } catch (RemoteException e) { 5994 // pass 5995 } 5996 } 5997 5998 /** 5999 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} back from 6000 * opaque to translucent following a call to {@link #convertFromTranslucent()}. 6001 * <p> 6002 * Calling this allows the Activity behind this one to be seen again. Once all such Activities 6003 * have been redrawn {@link TranslucentConversionListener#onTranslucentConversionComplete} will 6004 * be called indicating that it is safe to make this activity translucent again. Until 6005 * {@link TranslucentConversionListener#onTranslucentConversionComplete} is called the image 6006 * behind the frontmost Activity will be indeterminate. 6007 * <p> 6008 * This call has no effect on non-translucent activities or on activities with the 6009 * {@link android.R.attr#windowIsFloating} attribute. 6010 * 6011 * @param callback the method to call when all visible Activities behind this one have been 6012 * drawn and it is safe to make this Activity translucent again. 6013 * @param options activity options delivered to the activity below this one. The options 6014 * are retrieved using {@link #getActivityOptions}. 6015 * @return <code>true</code> if Window was opaque and will become translucent or 6016 * <code>false</code> if window was translucent and no change needed to be made. 6017 * 6018 * @see #convertFromTranslucent() 6019 * @see TranslucentConversionListener 6020 * 6021 * @hide 6022 */ 6023 @SystemApi 6024 public boolean convertToTranslucent(TranslucentConversionListener callback, 6025 ActivityOptions options) { 6026 boolean drawComplete; 6027 try { 6028 mTranslucentCallback = callback; 6029 mChangeCanvasToTranslucent = 6030 ActivityManagerNative.getDefault().convertToTranslucent(mToken, options); 6031 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 6032 drawComplete = true; 6033 } catch (RemoteException e) { 6034 // Make callback return as though it timed out. 6035 mChangeCanvasToTranslucent = false; 6036 drawComplete = false; 6037 } 6038 if (!mChangeCanvasToTranslucent && mTranslucentCallback != null) { 6039 // Window is already translucent. 6040 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 6041 } 6042 return mChangeCanvasToTranslucent; 6043 } 6044 6045 /** @hide */ 6046 void onTranslucentConversionComplete(boolean drawComplete) { 6047 if (mTranslucentCallback != null) { 6048 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 6049 mTranslucentCallback = null; 6050 } 6051 if (mChangeCanvasToTranslucent) { 6052 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 6053 } 6054 } 6055 6056 /** @hide */ 6057 public void onNewActivityOptions(ActivityOptions options) { 6058 mActivityTransitionState.setEnterActivityOptions(this, options); 6059 if (!mStopped) { 6060 mActivityTransitionState.enterReady(this); 6061 } 6062 } 6063 6064 /** 6065 * Retrieve the ActivityOptions passed in from the launching activity or passed back 6066 * from an activity launched by this activity in its call to {@link 6067 * #convertToTranslucent(TranslucentConversionListener, ActivityOptions)} 6068 * 6069 * @return The ActivityOptions passed to {@link #convertToTranslucent}. 6070 * @hide 6071 */ 6072 ActivityOptions getActivityOptions() { 6073 try { 6074 return ActivityManagerNative.getDefault().getActivityOptions(mToken); 6075 } catch (RemoteException e) { 6076 } 6077 return null; 6078 } 6079 6080 /** 6081 * Activities that want to remain visible behind a translucent activity above them must call 6082 * this method anytime between the start of {@link #onResume()} and the return from 6083 * {@link #onPause()}. If this call is successful then the activity will remain visible after 6084 * {@link #onPause()} is called, and is allowed to continue playing media in the background. 6085 * 6086 * <p>The actions of this call are reset each time that this activity is brought to the 6087 * front. That is, every time {@link #onResume()} is called the activity will be assumed 6088 * to not have requested visible behind. Therefore, if you want this activity to continue to 6089 * be visible in the background you must call this method again. 6090 * 6091 * <p>Only fullscreen opaque activities may make this call. I.e. this call is a nop 6092 * for dialog and translucent activities. 6093 * 6094 * <p>Under all circumstances, the activity must stop playing and release resources prior to or 6095 * within a call to {@link #onVisibleBehindCanceled()} or if this call returns false. 6096 * 6097 * <p>False will be returned any time this method is called between the return of onPause and 6098 * the next call to onResume. 6099 * 6100 * @param visible true to notify the system that the activity wishes to be visible behind other 6101 * translucent activities, false to indicate otherwise. Resources must be 6102 * released when passing false to this method. 6103 * @return the resulting visibiity state. If true the activity will remain visible beyond 6104 * {@link #onPause()} if the next activity is translucent or not fullscreen. If false 6105 * then the activity may not count on being visible behind other translucent activities, 6106 * and must stop any media playback and release resources. 6107 * Returning false may occur in lieu of a call to {@link #onVisibleBehindCanceled()} so 6108 * the return value must be checked. 6109 * 6110 * @see #onVisibleBehindCanceled() 6111 * @see #onBackgroundVisibleBehindChanged(boolean) 6112 */ 6113 public boolean requestVisibleBehind(boolean visible) { 6114 if (!mResumed) { 6115 // Do not permit paused or stopped activities to do this. 6116 visible = false; 6117 } 6118 try { 6119 mVisibleBehind = ActivityManagerNative.getDefault() 6120 .requestVisibleBehind(mToken, visible) && visible; 6121 } catch (RemoteException e) { 6122 mVisibleBehind = false; 6123 } 6124 return mVisibleBehind; 6125 } 6126 6127 /** 6128 * Called when a translucent activity over this activity is becoming opaque or another 6129 * activity is being launched. Activities that override this method must call 6130 * <code>super.onVisibleBehindCanceled()</code> or a SuperNotCalledException will be thrown. 6131 * 6132 * <p>When this method is called the activity has 500 msec to release any resources it may be 6133 * using while visible in the background. 6134 * If the activity has not returned from this method in 500 msec the system will destroy 6135 * the activity and kill the process in order to recover the resources for another 6136 * process. Otherwise {@link #onStop()} will be called following return. 6137 * 6138 * @see #requestVisibleBehind(boolean) 6139 * @see #onBackgroundVisibleBehindChanged(boolean) 6140 */ 6141 @CallSuper 6142 public void onVisibleBehindCanceled() { 6143 mCalled = true; 6144 } 6145 6146 /** 6147 * Translucent activities may call this to determine if there is an activity below them that 6148 * is currently set to be visible in the background. 6149 * 6150 * @return true if an activity below is set to visible according to the most recent call to 6151 * {@link #requestVisibleBehind(boolean)}, false otherwise. 6152 * 6153 * @see #requestVisibleBehind(boolean) 6154 * @see #onVisibleBehindCanceled() 6155 * @see #onBackgroundVisibleBehindChanged(boolean) 6156 * @hide 6157 */ 6158 @SystemApi 6159 public boolean isBackgroundVisibleBehind() { 6160 try { 6161 return ActivityManagerNative.getDefault().isBackgroundVisibleBehind(mToken); 6162 } catch (RemoteException e) { 6163 } 6164 return false; 6165 } 6166 6167 /** 6168 * The topmost foreground activity will receive this call when the background visibility state 6169 * of the activity below it changes. 6170 * 6171 * This call may be a consequence of {@link #requestVisibleBehind(boolean)} or might be 6172 * due to a background activity finishing itself. 6173 * 6174 * @param visible true if a background activity is visible, false otherwise. 6175 * 6176 * @see #requestVisibleBehind(boolean) 6177 * @see #onVisibleBehindCanceled() 6178 * @hide 6179 */ 6180 @SystemApi 6181 public void onBackgroundVisibleBehindChanged(boolean visible) { 6182 } 6183 6184 /** 6185 * Activities cannot draw during the period that their windows are animating in. In order 6186 * to know when it is safe to begin drawing they can override this method which will be 6187 * called when the entering animation has completed. 6188 */ 6189 public void onEnterAnimationComplete() { 6190 } 6191 6192 /** 6193 * @hide 6194 */ 6195 public void dispatchEnterAnimationComplete() { 6196 onEnterAnimationComplete(); 6197 if (getWindow() != null && getWindow().getDecorView() != null) { 6198 getWindow().getDecorView().getViewTreeObserver().dispatchOnEnterAnimationComplete(); 6199 } 6200 } 6201 6202 /** 6203 * Adjust the current immersive mode setting. 6204 * 6205 * Note that changing this value will have no effect on the activity's 6206 * {@link android.content.pm.ActivityInfo} structure; that is, if 6207 * <code>android:immersive</code> is set to <code>true</code> 6208 * in the application's manifest entry for this activity, the {@link 6209 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 6210 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6211 * FLAG_IMMERSIVE} bit set. 6212 * 6213 * @see #isImmersive() 6214 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6215 */ 6216 public void setImmersive(boolean i) { 6217 try { 6218 ActivityManagerNative.getDefault().setImmersive(mToken, i); 6219 } catch (RemoteException e) { 6220 // pass 6221 } 6222 } 6223 6224 /** 6225 * Enable or disable virtual reality (VR) mode. 6226 * 6227 * <p>VR mode is a hint to Android system services to switch to a mode optimized for 6228 * high-performance stereoscopic rendering. This mode will be enabled while this Activity has 6229 * focus.</p> 6230 * 6231 * @param enabled {@code true} to enable this mode. 6232 * @param requestedComponent the name of the component to use as a 6233 * {@link android.service.vr.VrListenerService} while VR mode is enabled. 6234 * 6235 * @throws android.content.pm.PackageManager.NameNotFoundException; 6236 */ 6237 public void setVrModeEnabled(boolean enabled, @NonNull ComponentName requestedComponent) 6238 throws PackageManager.NameNotFoundException { 6239 try { 6240 if (ActivityManagerNative.getDefault().setVrMode(mToken, enabled, requestedComponent) 6241 != 0) { 6242 throw new PackageManager.NameNotFoundException( 6243 requestedComponent.flattenToString()); 6244 } 6245 } catch (RemoteException e) { 6246 // pass 6247 } 6248 } 6249 6250 /** 6251 * Start an action mode of the default type {@link ActionMode#TYPE_PRIMARY}. 6252 * 6253 * @param callback Callback that will manage lifecycle events for this action mode 6254 * @return The ActionMode that was started, or null if it was canceled 6255 * 6256 * @see ActionMode 6257 */ 6258 @Nullable 6259 public ActionMode startActionMode(ActionMode.Callback callback) { 6260 return mWindow.getDecorView().startActionMode(callback); 6261 } 6262 6263 /** 6264 * Start an action mode of the given type. 6265 * 6266 * @param callback Callback that will manage lifecycle events for this action mode 6267 * @param type One of {@link ActionMode#TYPE_PRIMARY} or {@link ActionMode#TYPE_FLOATING}. 6268 * @return The ActionMode that was started, or null if it was canceled 6269 * 6270 * @see ActionMode 6271 */ 6272 @Nullable 6273 public ActionMode startActionMode(ActionMode.Callback callback, int type) { 6274 return mWindow.getDecorView().startActionMode(callback, type); 6275 } 6276 6277 /** 6278 * Give the Activity a chance to control the UI for an action mode requested 6279 * by the system. 6280 * 6281 * <p>Note: If you are looking for a notification callback that an action mode 6282 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 6283 * 6284 * @param callback The callback that should control the new action mode 6285 * @return The new action mode, or <code>null</code> if the activity does not want to 6286 * provide special handling for this action mode. (It will be handled by the system.) 6287 */ 6288 @Nullable 6289 @Override 6290 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 6291 // Only Primary ActionModes are represented in the ActionBar. 6292 if (mActionModeTypeStarting == ActionMode.TYPE_PRIMARY) { 6293 initWindowDecorActionBar(); 6294 if (mActionBar != null) { 6295 return mActionBar.startActionMode(callback); 6296 } 6297 } 6298 return null; 6299 } 6300 6301 /** 6302 * {@inheritDoc} 6303 */ 6304 @Nullable 6305 @Override 6306 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback, int type) { 6307 try { 6308 mActionModeTypeStarting = type; 6309 return onWindowStartingActionMode(callback); 6310 } finally { 6311 mActionModeTypeStarting = ActionMode.TYPE_PRIMARY; 6312 } 6313 } 6314 6315 /** 6316 * Notifies the Activity that an action mode has been started. 6317 * Activity subclasses overriding this method should call the superclass implementation. 6318 * 6319 * @param mode The new action mode. 6320 */ 6321 @CallSuper 6322 @Override 6323 public void onActionModeStarted(ActionMode mode) { 6324 } 6325 6326 /** 6327 * Notifies the activity that an action mode has finished. 6328 * Activity subclasses overriding this method should call the superclass implementation. 6329 * 6330 * @param mode The action mode that just finished. 6331 */ 6332 @CallSuper 6333 @Override 6334 public void onActionModeFinished(ActionMode mode) { 6335 } 6336 6337 /** 6338 * Returns true if the app should recreate the task when navigating 'up' from this activity 6339 * by using targetIntent. 6340 * 6341 * <p>If this method returns false the app can trivially call 6342 * {@link #navigateUpTo(Intent)} using the same parameters to correctly perform 6343 * up navigation. If this method returns false, the app should synthesize a new task stack 6344 * by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation.</p> 6345 * 6346 * @param targetIntent An intent representing the target destination for up navigation 6347 * @return true if navigating up should recreate a new task stack, false if the same task 6348 * should be used for the destination 6349 */ 6350 public boolean shouldUpRecreateTask(Intent targetIntent) { 6351 try { 6352 PackageManager pm = getPackageManager(); 6353 ComponentName cn = targetIntent.getComponent(); 6354 if (cn == null) { 6355 cn = targetIntent.resolveActivity(pm); 6356 } 6357 ActivityInfo info = pm.getActivityInfo(cn, 0); 6358 if (info.taskAffinity == null) { 6359 return false; 6360 } 6361 return ActivityManagerNative.getDefault() 6362 .shouldUpRecreateTask(mToken, info.taskAffinity); 6363 } catch (RemoteException e) { 6364 return false; 6365 } catch (NameNotFoundException e) { 6366 return false; 6367 } 6368 } 6369 6370 /** 6371 * Navigate from this activity to the activity specified by upIntent, finishing this activity 6372 * in the process. If the activity indicated by upIntent already exists in the task's history, 6373 * this activity and all others before the indicated activity in the history stack will be 6374 * finished. 6375 * 6376 * <p>If the indicated activity does not appear in the history stack, this will finish 6377 * each activity in this task until the root activity of the task is reached, resulting in 6378 * an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy 6379 * when an activity may be reached by a path not passing through a canonical parent 6380 * activity.</p> 6381 * 6382 * <p>This method should be used when performing up navigation from within the same task 6383 * as the destination. If up navigation should cross tasks in some cases, see 6384 * {@link #shouldUpRecreateTask(Intent)}.</p> 6385 * 6386 * @param upIntent An intent representing the target destination for up navigation 6387 * 6388 * @return true if up navigation successfully reached the activity indicated by upIntent and 6389 * upIntent was delivered to it. false if an instance of the indicated activity could 6390 * not be found and this activity was simply finished normally. 6391 */ 6392 public boolean navigateUpTo(Intent upIntent) { 6393 if (mParent == null) { 6394 ComponentName destInfo = upIntent.getComponent(); 6395 if (destInfo == null) { 6396 destInfo = upIntent.resolveActivity(getPackageManager()); 6397 if (destInfo == null) { 6398 return false; 6399 } 6400 upIntent = new Intent(upIntent); 6401 upIntent.setComponent(destInfo); 6402 } 6403 int resultCode; 6404 Intent resultData; 6405 synchronized (this) { 6406 resultCode = mResultCode; 6407 resultData = mResultData; 6408 } 6409 if (resultData != null) { 6410 resultData.prepareToLeaveProcess(this); 6411 } 6412 try { 6413 upIntent.prepareToLeaveProcess(this); 6414 return ActivityManagerNative.getDefault().navigateUpTo(mToken, upIntent, 6415 resultCode, resultData); 6416 } catch (RemoteException e) { 6417 return false; 6418 } 6419 } else { 6420 return mParent.navigateUpToFromChild(this, upIntent); 6421 } 6422 } 6423 6424 /** 6425 * This is called when a child activity of this one calls its 6426 * {@link #navigateUpTo} method. The default implementation simply calls 6427 * navigateUpTo(upIntent) on this activity (the parent). 6428 * 6429 * @param child The activity making the call. 6430 * @param upIntent An intent representing the target destination for up navigation 6431 * 6432 * @return true if up navigation successfully reached the activity indicated by upIntent and 6433 * upIntent was delivered to it. false if an instance of the indicated activity could 6434 * not be found and this activity was simply finished normally. 6435 */ 6436 public boolean navigateUpToFromChild(Activity child, Intent upIntent) { 6437 return navigateUpTo(upIntent); 6438 } 6439 6440 /** 6441 * Obtain an {@link Intent} that will launch an explicit target activity specified by 6442 * this activity's logical parent. The logical parent is named in the application's manifest 6443 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute. 6444 * Activity subclasses may override this method to modify the Intent returned by 6445 * super.getParentActivityIntent() or to implement a different mechanism of retrieving 6446 * the parent intent entirely. 6447 * 6448 * @return a new Intent targeting the defined parent of this activity or null if 6449 * there is no valid parent. 6450 */ 6451 @Nullable 6452 public Intent getParentActivityIntent() { 6453 final String parentName = mActivityInfo.parentActivityName; 6454 if (TextUtils.isEmpty(parentName)) { 6455 return null; 6456 } 6457 6458 // If the parent itself has no parent, generate a main activity intent. 6459 final ComponentName target = new ComponentName(this, parentName); 6460 try { 6461 final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0); 6462 final String parentActivity = parentInfo.parentActivityName; 6463 final Intent parentIntent = parentActivity == null 6464 ? Intent.makeMainActivity(target) 6465 : new Intent().setComponent(target); 6466 return parentIntent; 6467 } catch (NameNotFoundException e) { 6468 Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName + 6469 "' in manifest"); 6470 return null; 6471 } 6472 } 6473 6474 /** 6475 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6476 * android.view.View, String)} was used to start an Activity, <var>callback</var> 6477 * will be called to handle shared elements on the <i>launched</i> Activity. This requires 6478 * {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 6479 * 6480 * @param callback Used to manipulate shared element transitions on the launched Activity. 6481 */ 6482 public void setEnterSharedElementCallback(SharedElementCallback callback) { 6483 if (callback == null) { 6484 callback = SharedElementCallback.NULL_CALLBACK; 6485 } 6486 mEnterTransitionListener = callback; 6487 } 6488 6489 /** 6490 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6491 * android.view.View, String)} was used to start an Activity, <var>callback</var> 6492 * will be called to handle shared elements on the <i>launching</i> Activity. Most 6493 * calls will only come when returning from the started Activity. 6494 * This requires {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 6495 * 6496 * @param callback Used to manipulate shared element transitions on the launching Activity. 6497 */ 6498 public void setExitSharedElementCallback(SharedElementCallback callback) { 6499 if (callback == null) { 6500 callback = SharedElementCallback.NULL_CALLBACK; 6501 } 6502 mExitTransitionListener = callback; 6503 } 6504 6505 /** 6506 * Postpone the entering activity transition when Activity was started with 6507 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6508 * android.util.Pair[])}. 6509 * <p>This method gives the Activity the ability to delay starting the entering and 6510 * shared element transitions until all data is loaded. Until then, the Activity won't 6511 * draw into its window, leaving the window transparent. This may also cause the 6512 * returning animation to be delayed until data is ready. This method should be 6513 * called in {@link #onCreate(android.os.Bundle)} or in 6514 * {@link #onActivityReenter(int, android.content.Intent)}. 6515 * {@link #startPostponedEnterTransition()} must be called to allow the Activity to 6516 * start the transitions. If the Activity did not use 6517 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6518 * android.util.Pair[])}, then this method does nothing.</p> 6519 */ 6520 public void postponeEnterTransition() { 6521 mActivityTransitionState.postponeEnterTransition(); 6522 } 6523 6524 /** 6525 * Begin postponed transitions after {@link #postponeEnterTransition()} was called. 6526 * If postponeEnterTransition() was called, you must call startPostponedEnterTransition() 6527 * to have your Activity start drawing. 6528 */ 6529 public void startPostponedEnterTransition() { 6530 mActivityTransitionState.startPostponedEnterTransition(); 6531 } 6532 6533 /** 6534 * Create {@link DragAndDropPermissions} object bound to this activity and controlling the 6535 * access permissions for content URIs associated with the {@link DragEvent}. 6536 * @param event Drag event 6537 * @return The {@link DragAndDropPermissions} object used to control access to the content URIs. 6538 * Null if no content URIs are associated with the event or if permissions could not be granted. 6539 */ 6540 public DragAndDropPermissions requestDragAndDropPermissions(DragEvent event) { 6541 DragAndDropPermissions dragAndDropPermissions = DragAndDropPermissions.obtain(event); 6542 if (dragAndDropPermissions != null && dragAndDropPermissions.take(getActivityToken())) { 6543 return dragAndDropPermissions; 6544 } 6545 return null; 6546 } 6547 6548 // ------------------ Internal API ------------------ 6549 6550 final void setParent(Activity parent) { 6551 mParent = parent; 6552 } 6553 6554 final void attach(Context context, ActivityThread aThread, 6555 Instrumentation instr, IBinder token, int ident, 6556 Application application, Intent intent, ActivityInfo info, 6557 CharSequence title, Activity parent, String id, 6558 NonConfigurationInstances lastNonConfigurationInstances, 6559 Configuration config, String referrer, IVoiceInteractor voiceInteractor, 6560 Window window) { 6561 attachBaseContext(context); 6562 6563 mFragments.attachHost(null /*parent*/); 6564 6565 mWindow = new PhoneWindow(this, window); 6566 mWindow.setWindowControllerCallback(this); 6567 mWindow.setCallback(this); 6568 mWindow.setOnWindowDismissedCallback(this); 6569 mWindow.getLayoutInflater().setPrivateFactory(this); 6570 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 6571 mWindow.setSoftInputMode(info.softInputMode); 6572 } 6573 if (info.uiOptions != 0) { 6574 mWindow.setUiOptions(info.uiOptions); 6575 } 6576 mUiThread = Thread.currentThread(); 6577 6578 mMainThread = aThread; 6579 mInstrumentation = instr; 6580 mToken = token; 6581 mIdent = ident; 6582 mApplication = application; 6583 mIntent = intent; 6584 mReferrer = referrer; 6585 mComponent = intent.getComponent(); 6586 mActivityInfo = info; 6587 mTitle = title; 6588 mParent = parent; 6589 mEmbeddedID = id; 6590 mLastNonConfigurationInstances = lastNonConfigurationInstances; 6591 if (voiceInteractor != null) { 6592 if (lastNonConfigurationInstances != null) { 6593 mVoiceInteractor = lastNonConfigurationInstances.voiceInteractor; 6594 } else { 6595 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 6596 Looper.myLooper()); 6597 } 6598 } 6599 6600 mWindow.setWindowManager( 6601 (WindowManager)context.getSystemService(Context.WINDOW_SERVICE), 6602 mToken, mComponent.flattenToString(), 6603 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 6604 if (mParent != null) { 6605 mWindow.setContainer(mParent.getWindow()); 6606 } 6607 mWindowManager = mWindow.getWindowManager(); 6608 mCurrentConfig = config; 6609 } 6610 6611 /** @hide */ 6612 public final IBinder getActivityToken() { 6613 return mParent != null ? mParent.getActivityToken() : mToken; 6614 } 6615 6616 final void performCreateCommon() { 6617 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 6618 com.android.internal.R.styleable.Window_windowNoDisplay, false); 6619 mFragments.dispatchActivityCreated(); 6620 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6621 } 6622 6623 final void performCreate(Bundle icicle) { 6624 restoreHasCurrentPermissionRequest(icicle); 6625 onCreate(icicle); 6626 mActivityTransitionState.readState(icicle); 6627 performCreateCommon(); 6628 } 6629 6630 final void performCreate(Bundle icicle, PersistableBundle persistentState) { 6631 restoreHasCurrentPermissionRequest(icicle); 6632 onCreate(icicle, persistentState); 6633 mActivityTransitionState.readState(icicle); 6634 performCreateCommon(); 6635 } 6636 6637 final void performStart() { 6638 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6639 mFragments.noteStateNotSaved(); 6640 mCalled = false; 6641 mFragments.execPendingActions(); 6642 mInstrumentation.callActivityOnStart(this); 6643 if (!mCalled) { 6644 throw new SuperNotCalledException( 6645 "Activity " + mComponent.toShortString() + 6646 " did not call through to super.onStart()"); 6647 } 6648 mFragments.dispatchStart(); 6649 mFragments.reportLoaderStart(); 6650 6651 // This property is set for all builds except final release 6652 boolean isDlwarningEnabled = SystemProperties.getInt("ro.bionic.ld.warning", 0) == 1; 6653 boolean isAppDebuggable = 6654 (mApplication.getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0; 6655 6656 if (isAppDebuggable || isDlwarningEnabled) { 6657 String dlwarning = getDlWarning(); 6658 if (dlwarning != null) { 6659 String appName = getApplicationInfo().loadLabel(getPackageManager()) 6660 .toString(); 6661 String warning = "Detected problems with app native libraries\n" + 6662 "(please consult log for detail):\n" + dlwarning; 6663 if (isAppDebuggable) { 6664 new AlertDialog.Builder(this). 6665 setTitle(appName). 6666 setMessage(warning). 6667 setPositiveButton(android.R.string.ok, null). 6668 setCancelable(false). 6669 show(); 6670 } else { 6671 Toast.makeText(this, appName + "\n" + warning, Toast.LENGTH_LONG).show(); 6672 } 6673 } 6674 } 6675 6676 mActivityTransitionState.enterReady(this); 6677 } 6678 6679 final void performRestart() { 6680 mFragments.noteStateNotSaved(); 6681 6682 if (mToken != null && mParent == null) { 6683 // No need to check mStopped, the roots will check if they were actually stopped. 6684 WindowManagerGlobal.getInstance().setStoppedState(mToken, false /* stopped */); 6685 } 6686 6687 if (mStopped) { 6688 mStopped = false; 6689 6690 synchronized (mManagedCursors) { 6691 final int N = mManagedCursors.size(); 6692 for (int i=0; i<N; i++) { 6693 ManagedCursor mc = mManagedCursors.get(i); 6694 if (mc.mReleased || mc.mUpdated) { 6695 if (!mc.mCursor.requery()) { 6696 if (getApplicationInfo().targetSdkVersion 6697 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 6698 throw new IllegalStateException( 6699 "trying to requery an already closed cursor " 6700 + mc.mCursor); 6701 } 6702 } 6703 mc.mReleased = false; 6704 mc.mUpdated = false; 6705 } 6706 } 6707 } 6708 6709 mCalled = false; 6710 mInstrumentation.callActivityOnRestart(this); 6711 if (!mCalled) { 6712 throw new SuperNotCalledException( 6713 "Activity " + mComponent.toShortString() + 6714 " did not call through to super.onRestart()"); 6715 } 6716 performStart(); 6717 } 6718 } 6719 6720 final void performResume() { 6721 performRestart(); 6722 6723 mFragments.execPendingActions(); 6724 6725 mLastNonConfigurationInstances = null; 6726 6727 mCalled = false; 6728 // mResumed is set by the instrumentation 6729 mInstrumentation.callActivityOnResume(this); 6730 if (!mCalled) { 6731 throw new SuperNotCalledException( 6732 "Activity " + mComponent.toShortString() + 6733 " did not call through to super.onResume()"); 6734 } 6735 6736 // invisible activities must be finished before onResume() completes 6737 if (!mVisibleFromClient && !mFinished) { 6738 Log.w(TAG, "An activity without a UI must call finish() before onResume() completes"); 6739 if (getApplicationInfo().targetSdkVersion 6740 > android.os.Build.VERSION_CODES.LOLLIPOP_MR1) { 6741 throw new IllegalStateException( 6742 "Activity " + mComponent.toShortString() + 6743 " did not call finish() prior to onResume() completing"); 6744 } 6745 } 6746 6747 // Now really resume, and install the current status bar and menu. 6748 mCalled = false; 6749 6750 mFragments.dispatchResume(); 6751 mFragments.execPendingActions(); 6752 6753 onPostResume(); 6754 if (!mCalled) { 6755 throw new SuperNotCalledException( 6756 "Activity " + mComponent.toShortString() + 6757 " did not call through to super.onPostResume()"); 6758 } 6759 } 6760 6761 final void performPause() { 6762 mDoReportFullyDrawn = false; 6763 mFragments.dispatchPause(); 6764 mCalled = false; 6765 onPause(); 6766 mResumed = false; 6767 if (!mCalled && getApplicationInfo().targetSdkVersion 6768 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 6769 throw new SuperNotCalledException( 6770 "Activity " + mComponent.toShortString() + 6771 " did not call through to super.onPause()"); 6772 } 6773 mResumed = false; 6774 } 6775 6776 final void performUserLeaving() { 6777 onUserInteraction(); 6778 onUserLeaveHint(); 6779 } 6780 6781 final void performStop(boolean preserveWindow) { 6782 mDoReportFullyDrawn = false; 6783 mFragments.doLoaderStop(mChangingConfigurations /*retain*/); 6784 6785 if (!mStopped) { 6786 if (mWindow != null) { 6787 mWindow.closeAllPanels(); 6788 } 6789 6790 // If we're preserving the window, don't setStoppedState to true, since we 6791 // need the window started immediately again. Stopping the window will 6792 // destroys hardware resources and causes flicker. 6793 if (!preserveWindow && mToken != null && mParent == null) { 6794 WindowManagerGlobal.getInstance().setStoppedState(mToken, true); 6795 } 6796 6797 mFragments.dispatchStop(); 6798 6799 mCalled = false; 6800 mInstrumentation.callActivityOnStop(this); 6801 if (!mCalled) { 6802 throw new SuperNotCalledException( 6803 "Activity " + mComponent.toShortString() + 6804 " did not call through to super.onStop()"); 6805 } 6806 6807 synchronized (mManagedCursors) { 6808 final int N = mManagedCursors.size(); 6809 for (int i=0; i<N; i++) { 6810 ManagedCursor mc = mManagedCursors.get(i); 6811 if (!mc.mReleased) { 6812 mc.mCursor.deactivate(); 6813 mc.mReleased = true; 6814 } 6815 } 6816 } 6817 6818 mStopped = true; 6819 } 6820 mResumed = false; 6821 } 6822 6823 final void performDestroy() { 6824 mDestroyed = true; 6825 mWindow.destroy(); 6826 mFragments.dispatchDestroy(); 6827 onDestroy(); 6828 mFragments.doLoaderDestroy(); 6829 if (mVoiceInteractor != null) { 6830 mVoiceInteractor.detachActivity(); 6831 } 6832 } 6833 6834 /** 6835 * @hide 6836 */ 6837 public final boolean isResumed() { 6838 return mResumed; 6839 } 6840 6841 private void storeHasCurrentPermissionRequest(Bundle bundle) { 6842 if (bundle != null && mHasCurrentPermissionsRequest) { 6843 bundle.putBoolean(HAS_CURENT_PERMISSIONS_REQUEST_KEY, true); 6844 } 6845 } 6846 6847 private void restoreHasCurrentPermissionRequest(Bundle bundle) { 6848 if (bundle != null) { 6849 mHasCurrentPermissionsRequest = bundle.getBoolean( 6850 HAS_CURENT_PERMISSIONS_REQUEST_KEY, false); 6851 } 6852 } 6853 6854 void dispatchActivityResult(String who, int requestCode, 6855 int resultCode, Intent data) { 6856 if (false) Log.v( 6857 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 6858 + ", resCode=" + resultCode + ", data=" + data); 6859 mFragments.noteStateNotSaved(); 6860 if (who == null) { 6861 onActivityResult(requestCode, resultCode, data); 6862 } else if (who.startsWith(REQUEST_PERMISSIONS_WHO_PREFIX)) { 6863 who = who.substring(REQUEST_PERMISSIONS_WHO_PREFIX.length()); 6864 if (TextUtils.isEmpty(who)) { 6865 dispatchRequestPermissionsResult(requestCode, data); 6866 } else { 6867 Fragment frag = mFragments.findFragmentByWho(who); 6868 if (frag != null) { 6869 dispatchRequestPermissionsResultToFragment(requestCode, data, frag); 6870 } 6871 } 6872 } else if (who.startsWith("@android:view:")) { 6873 ArrayList<ViewRootImpl> views = WindowManagerGlobal.getInstance().getRootViews( 6874 getActivityToken()); 6875 for (ViewRootImpl viewRoot : views) { 6876 if (viewRoot.getView() != null 6877 && viewRoot.getView().dispatchActivityResult( 6878 who, requestCode, resultCode, data)) { 6879 return; 6880 } 6881 } 6882 } else { 6883 Fragment frag = mFragments.findFragmentByWho(who); 6884 if (frag != null) { 6885 frag.onActivityResult(requestCode, resultCode, data); 6886 } 6887 } 6888 } 6889 6890 /** 6891 * Request to put this Activity in a mode where the user is locked to the 6892 * current task. 6893 * 6894 * This will prevent the user from launching other apps, going to settings, or reaching the 6895 * home screen. This does not include those apps whose {@link android.R.attr#lockTaskMode} 6896 * values permit launching while locked. 6897 * 6898 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns true or 6899 * lockTaskMode=lockTaskModeAlways for this component then the app will go directly into 6900 * Lock Task mode. The user will not be able to exit this mode until 6901 * {@link Activity#stopLockTask()} is called. 6902 * 6903 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns false 6904 * then the system will prompt the user with a dialog requesting permission to enter 6905 * this mode. When entered through this method the user can exit at any time through 6906 * an action described by the request dialog. Calling stopLockTask will also exit the 6907 * mode. 6908 * 6909 * @see android.R.attr#lockTaskMode 6910 */ 6911 public void startLockTask() { 6912 try { 6913 ActivityManagerNative.getDefault().startLockTaskMode(mToken); 6914 } catch (RemoteException e) { 6915 } 6916 } 6917 6918 /** 6919 * Allow the user to switch away from the current task. 6920 * 6921 * Called to end the mode started by {@link Activity#startLockTask}. This 6922 * can only be called by activities that have successfully called 6923 * startLockTask previously. 6924 * 6925 * This will allow the user to exit this app and move onto other activities. 6926 * <p>Note: This method should only be called when the activity is user-facing. That is, 6927 * between onResume() and onPause(). 6928 * <p>Note: If there are other tasks below this one that are also locked then calling this 6929 * method will immediately finish this task and resume the previous locked one, remaining in 6930 * lockTask mode. 6931 * 6932 * @see android.R.attr#lockTaskMode 6933 * @see ActivityManager#getLockTaskModeState() 6934 */ 6935 public void stopLockTask() { 6936 try { 6937 ActivityManagerNative.getDefault().stopLockTaskMode(); 6938 } catch (RemoteException e) { 6939 } 6940 } 6941 6942 /** 6943 * Shows the user the system defined message for telling the user how to exit 6944 * lock task mode. The task containing this activity must be in lock task mode at the time 6945 * of this call for the message to be displayed. 6946 */ 6947 public void showLockTaskEscapeMessage() { 6948 try { 6949 ActivityManagerNative.getDefault().showLockTaskEscapeMessage(mToken); 6950 } catch (RemoteException e) { 6951 } 6952 } 6953 6954 /** 6955 * Check whether the caption on freeform windows is displayed directly on the content. 6956 * 6957 * @return True if caption is displayed on content, false if it pushes the content down. 6958 * 6959 * @see {@link #setOverlayWithDecorCaptionEnabled(boolean)} 6960 */ 6961 public boolean isOverlayWithDecorCaptionEnabled() { 6962 return mWindow.isOverlayWithDecorCaptionEnabled(); 6963 } 6964 6965 /** 6966 * Set whether the caption should displayed directly on the content rather than push it down. 6967 * 6968 * This affects only freeform windows since they display the caption and only the main 6969 * window of the activity. The caption is used to drag the window around and also shows 6970 * maximize and close action buttons. 6971 */ 6972 public void setOverlayWithDecorCaptionEnabled(boolean enabled) { 6973 mWindow.setOverlayWithDecorCaptionEnabled(enabled); 6974 } 6975 6976 /** 6977 * Interface for informing a translucent {@link Activity} once all visible activities below it 6978 * have completed drawing. This is necessary only after an {@link Activity} has been made 6979 * opaque using {@link Activity#convertFromTranslucent()} and before it has been drawn 6980 * translucent again following a call to {@link 6981 * Activity#convertToTranslucent(android.app.Activity.TranslucentConversionListener, 6982 * ActivityOptions)} 6983 * 6984 * @hide 6985 */ 6986 @SystemApi 6987 public interface TranslucentConversionListener { 6988 /** 6989 * Callback made following {@link Activity#convertToTranslucent} once all visible Activities 6990 * below the top one have been redrawn. Following this callback it is safe to make the top 6991 * Activity translucent because the underlying Activity has been drawn. 6992 * 6993 * @param drawComplete True if the background Activity has drawn itself. False if a timeout 6994 * occurred waiting for the Activity to complete drawing. 6995 * 6996 * @see Activity#convertFromTranslucent() 6997 * @see Activity#convertToTranslucent(TranslucentConversionListener, ActivityOptions) 6998 */ 6999 public void onTranslucentConversionComplete(boolean drawComplete); 7000 } 7001 7002 private void dispatchRequestPermissionsResult(int requestCode, Intent data) { 7003 mHasCurrentPermissionsRequest = false; 7004 // If the package installer crashed we may have not data - best effort. 7005 String[] permissions = (data != null) ? data.getStringArrayExtra( 7006 PackageManager.EXTRA_REQUEST_PERMISSIONS_NAMES) : new String[0]; 7007 final int[] grantResults = (data != null) ? data.getIntArrayExtra( 7008 PackageManager.EXTRA_REQUEST_PERMISSIONS_RESULTS) : new int[0]; 7009 onRequestPermissionsResult(requestCode, permissions, grantResults); 7010 } 7011 7012 private void dispatchRequestPermissionsResultToFragment(int requestCode, Intent data, 7013 Fragment fragment) { 7014 // If the package installer crashed we may have not data - best effort. 7015 String[] permissions = (data != null) ? data.getStringArrayExtra( 7016 PackageManager.EXTRA_REQUEST_PERMISSIONS_NAMES) : new String[0]; 7017 final int[] grantResults = (data != null) ? data.getIntArrayExtra( 7018 PackageManager.EXTRA_REQUEST_PERMISSIONS_RESULTS) : new int[0]; 7019 fragment.onRequestPermissionsResult(requestCode, permissions, grantResults); 7020 } 7021 7022 class HostCallbacks extends FragmentHostCallback<Activity> { 7023 public HostCallbacks() { 7024 super(Activity.this /*activity*/); 7025 } 7026 7027 @Override 7028 public void onDump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 7029 Activity.this.dump(prefix, fd, writer, args); 7030 } 7031 7032 @Override 7033 public boolean onShouldSaveFragmentState(Fragment fragment) { 7034 return !isFinishing(); 7035 } 7036 7037 @Override 7038 public LayoutInflater onGetLayoutInflater() { 7039 final LayoutInflater result = Activity.this.getLayoutInflater(); 7040 if (onUseFragmentManagerInflaterFactory()) { 7041 return result.cloneInContext(Activity.this); 7042 } 7043 return result; 7044 } 7045 7046 @Override 7047 public boolean onUseFragmentManagerInflaterFactory() { 7048 // Newer platform versions use the child fragment manager's LayoutInflaterFactory. 7049 return getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.LOLLIPOP; 7050 } 7051 7052 @Override 7053 public Activity onGetHost() { 7054 return Activity.this; 7055 } 7056 7057 @Override 7058 public void onInvalidateOptionsMenu() { 7059 Activity.this.invalidateOptionsMenu(); 7060 } 7061 7062 @Override 7063 public void onStartActivityFromFragment(Fragment fragment, Intent intent, int requestCode, 7064 Bundle options) { 7065 Activity.this.startActivityFromFragment(fragment, intent, requestCode, options); 7066 } 7067 7068 @Override 7069 public void onStartIntentSenderFromFragment(Fragment fragment, IntentSender intent, 7070 int requestCode, @Nullable Intent fillInIntent, int flagsMask, int flagsValues, 7071 int extraFlags, Bundle options) throws IntentSender.SendIntentException { 7072 if (mParent == null) { 7073 startIntentSenderForResultInner(intent, fragment.mWho, requestCode, fillInIntent, 7074 flagsMask, flagsValues, options); 7075 } else if (options != null) { 7076 mParent.startIntentSenderFromChildFragment(fragment, intent, requestCode, 7077 fillInIntent, flagsMask, flagsValues, extraFlags, options); 7078 } 7079 } 7080 7081 @Override 7082 public void onRequestPermissionsFromFragment(Fragment fragment, String[] permissions, 7083 int requestCode) { 7084 String who = REQUEST_PERMISSIONS_WHO_PREFIX + fragment.mWho; 7085 Intent intent = getPackageManager().buildRequestPermissionsIntent(permissions); 7086 startActivityForResult(who, intent, requestCode, null); 7087 } 7088 7089 @Override 7090 public boolean onHasWindowAnimations() { 7091 return getWindow() != null; 7092 } 7093 7094 @Override 7095 public int onGetWindowAnimations() { 7096 final Window w = getWindow(); 7097 return (w == null) ? 0 : w.getAttributes().windowAnimations; 7098 } 7099 7100 @Override 7101 public void onAttachFragment(Fragment fragment) { 7102 Activity.this.onAttachFragment(fragment); 7103 } 7104 7105 @Nullable 7106 @Override 7107 public View onFindViewById(int id) { 7108 return Activity.this.findViewById(id); 7109 } 7110 7111 @Override 7112 public boolean onHasView() { 7113 final Window w = getWindow(); 7114 return (w != null && w.peekDecorView() != null); 7115 } 7116 } 7117} 7118