Activity.java revision dbd8a7ac406229f97e7d8236a2e5f8f2e13c4a30
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.Paint; 55import android.graphics.drawable.ColorDrawable; 56import android.graphics.drawable.Drawable; 57import android.graphics.drawable.InsetDrawable; 58import android.graphics.drawable.LayerDrawable; 59import android.graphics.drawable.ShapeDrawable; 60import android.media.AudioManager; 61import android.media.session.MediaController; 62import android.net.Uri; 63import android.os.Build; 64import android.os.Bundle; 65import android.os.Handler; 66import android.os.IBinder; 67import android.os.Looper; 68import android.os.Parcelable; 69import android.os.PersistableBundle; 70import android.os.RemoteException; 71import android.os.StrictMode; 72import android.os.SystemProperties; 73import android.os.UserHandle; 74import android.text.Selection; 75import android.text.SpannableStringBuilder; 76import android.text.TextUtils; 77import android.text.method.TextKeyListener; 78import android.transition.Scene; 79import android.transition.TransitionManager; 80import android.util.ArrayMap; 81import android.util.AttributeSet; 82import android.util.EventLog; 83import android.util.Log; 84import android.util.PrintWriterPrinter; 85import android.util.Slog; 86import android.util.SparseArray; 87import android.util.SuperNotCalledException; 88import android.view.ActionMode; 89import android.view.ContextMenu; 90import android.view.ContextMenu.ContextMenuInfo; 91import android.view.ContextThemeWrapper; 92import android.view.DragEvent; 93import android.view.DropPermissions; 94import android.view.KeyEvent; 95import android.view.KeyboardShortcutGroup; 96import android.view.KeyboardShortcutInfo; 97import android.view.LayoutInflater; 98import android.view.Menu; 99import android.view.MenuInflater; 100import android.view.MenuItem; 101import android.view.MotionEvent; 102import android.view.SearchEvent; 103import android.view.View; 104import android.view.View.OnCreateContextMenuListener; 105import android.view.ViewGroup; 106import android.view.ViewGroup.LayoutParams; 107import android.view.ViewManager; 108import android.view.ViewRootImpl; 109import android.view.Window; 110import android.view.Window.WindowControllerCallback; 111import android.view.WindowManager; 112import android.view.WindowManagerGlobal; 113import android.view.accessibility.AccessibilityEvent; 114import android.widget.AdapterView; 115import android.widget.Toast; 116import android.widget.Toolbar; 117 118import com.android.internal.app.IVoiceInteractor; 119import com.android.internal.app.ToolbarActionBar; 120import com.android.internal.app.WindowDecorActionBar; 121import com.android.internal.policy.DecorView; 122import com.android.internal.policy.PhoneWindow; 123 124import java.io.FileDescriptor; 125import java.io.PrintWriter; 126import java.lang.annotation.Retention; 127import java.lang.annotation.RetentionPolicy; 128import java.util.ArrayList; 129import java.util.HashMap; 130import java.util.List; 131 132/** 133 * An activity is a single, focused thing that the user can do. Almost all 134 * activities interact with the user, so the Activity class takes care of 135 * creating a window for you in which you can place your UI with 136 * {@link #setContentView}. While activities are often presented to the user 137 * as full-screen windows, they can also be used in other ways: as floating 138 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 139 * or embedded inside of another activity (using {@link ActivityGroup}). 140 * 141 * There are two methods almost all subclasses of Activity will implement: 142 * 143 * <ul> 144 * <li> {@link #onCreate} is where you initialize your activity. Most 145 * importantly, here you will usually call {@link #setContentView(int)} 146 * with a layout resource defining your UI, and using {@link #findViewById} 147 * to retrieve the widgets in that UI that you need to interact with 148 * programmatically. 149 * 150 * <li> {@link #onPause} is where you deal with the user leaving your 151 * activity. Most importantly, any changes made by the user should at this 152 * point be committed (usually to the 153 * {@link android.content.ContentProvider} holding the data). 154 * </ul> 155 * 156 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 157 * activity classes must have a corresponding 158 * {@link android.R.styleable#AndroidManifestActivity <activity>} 159 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 160 * 161 * <p>Topics covered here: 162 * <ol> 163 * <li><a href="#Fragments">Fragments</a> 164 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 165 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 166 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 167 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 168 * <li><a href="#Permissions">Permissions</a> 169 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 170 * </ol> 171 * 172 * <div class="special reference"> 173 * <h3>Developer Guides</h3> 174 * <p>The Activity class is an important part of an application's overall lifecycle, 175 * and the way activities are launched and put together is a fundamental 176 * part of the platform's application model. For a detailed perspective on the structure of an 177 * Android application and how activities behave, please read the 178 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 179 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 180 * developer guides.</p> 181 * 182 * <p>You can also find a detailed discussion about how to create activities in the 183 * <a href="{@docRoot}guide/topics/fundamentals/activities.html">Activities</a> 184 * developer guide.</p> 185 * </div> 186 * 187 * <a name="Fragments"></a> 188 * <h3>Fragments</h3> 189 * 190 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 191 * implementations can make use of the {@link Fragment} class to better 192 * modularize their code, build more sophisticated user interfaces for larger 193 * screens, and help scale their application between small and large screens. 194 * 195 * <a name="ActivityLifecycle"></a> 196 * <h3>Activity Lifecycle</h3> 197 * 198 * <p>Activities in the system are managed as an <em>activity stack</em>. 199 * When a new activity is started, it is placed on the top of the stack 200 * and becomes the running activity -- the previous activity always remains 201 * below it in the stack, and will not come to the foreground again until 202 * the new activity exits.</p> 203 * 204 * <p>An activity has essentially four states:</p> 205 * <ul> 206 * <li> If an activity in the foreground of the screen (at the top of 207 * the stack), 208 * it is <em>active</em> or <em>running</em>. </li> 209 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 210 * or transparent activity has focus on top of your activity), it 211 * is <em>paused</em>. A paused activity is completely alive (it 212 * maintains all state and member information and remains attached to 213 * the window manager), but can be killed by the system in extreme 214 * low memory situations. 215 * <li>If an activity is completely obscured by another activity, 216 * it is <em>stopped</em>. It still retains all state and member information, 217 * however, it is no longer visible to the user so its window is hidden 218 * and it will often be killed by the system when memory is needed 219 * elsewhere.</li> 220 * <li>If an activity is paused or stopped, the system can drop the activity 221 * from memory by either asking it to finish, or simply killing its 222 * process. When it is displayed again to the user, it must be 223 * completely restarted and restored to its previous state.</li> 224 * </ul> 225 * 226 * <p>The following diagram shows the important state paths of an Activity. 227 * The square rectangles represent callback methods you can implement to 228 * perform operations when the Activity moves between states. The colored 229 * ovals are major states the Activity can be in.</p> 230 * 231 * <p><img src="../../../images/activity_lifecycle.png" 232 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 233 * 234 * <p>There are three key loops you may be interested in monitoring within your 235 * activity: 236 * 237 * <ul> 238 * <li>The <b>entire lifetime</b> of an activity happens between the first call 239 * to {@link android.app.Activity#onCreate} through to a single final call 240 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 241 * of "global" state in onCreate(), and release all remaining resources in 242 * onDestroy(). For example, if it has a thread running in the background 243 * to download data from the network, it may create that thread in onCreate() 244 * and then stop the thread in onDestroy(). 245 * 246 * <li>The <b>visible lifetime</b> of an activity happens between a call to 247 * {@link android.app.Activity#onStart} until a corresponding call to 248 * {@link android.app.Activity#onStop}. During this time the user can see the 249 * activity on-screen, though it may not be in the foreground and interacting 250 * with the user. Between these two methods you can maintain resources that 251 * are needed to show the activity to the user. For example, you can register 252 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 253 * that impact your UI, and unregister it in onStop() when the user no 254 * longer sees what you are displaying. The onStart() and onStop() methods 255 * can be called multiple times, as the activity becomes visible and hidden 256 * to the user. 257 * 258 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 259 * {@link android.app.Activity#onResume} until a corresponding call to 260 * {@link android.app.Activity#onPause}. During this time the activity is 261 * in front of all other activities and interacting with the user. An activity 262 * can frequently go between the resumed and paused states -- for example when 263 * the device goes to sleep, when an activity result is delivered, when a new 264 * intent is delivered -- so the code in these methods should be fairly 265 * lightweight. 266 * </ul> 267 * 268 * <p>The entire lifecycle of an activity is defined by the following 269 * Activity methods. All of these are hooks that you can override 270 * to do appropriate work when the activity changes state. All 271 * activities will implement {@link android.app.Activity#onCreate} 272 * to do their initial setup; many will also implement 273 * {@link android.app.Activity#onPause} to commit changes to data and 274 * otherwise prepare to stop interacting with the user. You should always 275 * call up to your superclass when implementing these methods.</p> 276 * 277 * </p> 278 * <pre class="prettyprint"> 279 * public class Activity extends ApplicationContext { 280 * protected void onCreate(Bundle savedInstanceState); 281 * 282 * protected void onStart(); 283 * 284 * protected void onRestart(); 285 * 286 * protected void onResume(); 287 * 288 * protected void onPause(); 289 * 290 * protected void onStop(); 291 * 292 * protected void onDestroy(); 293 * } 294 * </pre> 295 * 296 * <p>In general the movement through an activity's lifecycle looks like 297 * this:</p> 298 * 299 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 300 * <colgroup align="left" span="3" /> 301 * <colgroup align="left" /> 302 * <colgroup align="center" /> 303 * <colgroup align="center" /> 304 * 305 * <thead> 306 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 307 * </thead> 308 * 309 * <tbody> 310 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 311 * <td>Called when the activity is first created. 312 * This is where you should do all of your normal static set up: 313 * create views, bind data to lists, etc. This method also 314 * provides you with a Bundle containing the activity's previously 315 * frozen state, if there was one. 316 * <p>Always followed by <code>onStart()</code>.</td> 317 * <td align="center">No</td> 318 * <td align="center"><code>onStart()</code></td> 319 * </tr> 320 * 321 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 322 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 323 * <td>Called after your activity has been stopped, prior to it being 324 * started again. 325 * <p>Always followed by <code>onStart()</code></td> 326 * <td align="center">No</td> 327 * <td align="center"><code>onStart()</code></td> 328 * </tr> 329 * 330 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 331 * <td>Called when the activity is becoming visible to the user. 332 * <p>Followed by <code>onResume()</code> if the activity comes 333 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 334 * <td align="center">No</td> 335 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 336 * </tr> 337 * 338 * <tr><td rowspan="2" style="border-left: none;"> </td> 339 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 340 * <td>Called when the activity will start 341 * interacting with the user. At this point your activity is at 342 * the top of the activity stack, with user input going to it. 343 * <p>Always followed by <code>onPause()</code>.</td> 344 * <td align="center">No</td> 345 * <td align="center"><code>onPause()</code></td> 346 * </tr> 347 * 348 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 349 * <td>Called when the system is about to start resuming a previous 350 * activity. This is typically used to commit unsaved changes to 351 * persistent data, stop animations and other things that may be consuming 352 * CPU, etc. Implementations of this method must be very quick because 353 * the next activity will not be resumed until this method returns. 354 * <p>Followed by either <code>onResume()</code> if the activity 355 * returns back to the front, or <code>onStop()</code> if it becomes 356 * invisible to the user.</td> 357 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 358 * <td align="center"><code>onResume()</code> or<br> 359 * <code>onStop()</code></td> 360 * </tr> 361 * 362 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 363 * <td>Called when the activity is no longer visible to the user, because 364 * another activity has been resumed and is covering this one. This 365 * may happen either because a new activity is being started, an existing 366 * one is being brought in front of this one, or this one is being 367 * destroyed. 368 * <p>Followed by either <code>onRestart()</code> if 369 * this activity is coming back to interact with the user, or 370 * <code>onDestroy()</code> if this activity is going away.</td> 371 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 372 * <td align="center"><code>onRestart()</code> or<br> 373 * <code>onDestroy()</code></td> 374 * </tr> 375 * 376 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 377 * <td>The final call you receive before your 378 * activity is destroyed. This can happen either because the 379 * activity is finishing (someone called {@link Activity#finish} on 380 * it, or because the system is temporarily destroying this 381 * instance of the activity to save space. You can distinguish 382 * between these two scenarios with the {@link 383 * Activity#isFinishing} method.</td> 384 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 385 * <td align="center"><em>nothing</em></td> 386 * </tr> 387 * </tbody> 388 * </table> 389 * 390 * <p>Note the "Killable" column in the above table -- for those methods that 391 * are marked as being killable, after that method returns the process hosting the 392 * activity may be killed by the system <em>at any time</em> without another line 393 * of its code being executed. Because of this, you should use the 394 * {@link #onPause} method to write any persistent data (such as user edits) 395 * to storage. In addition, the method 396 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 397 * in such a background state, allowing you to save away any dynamic instance 398 * state in your activity into the given Bundle, to be later received in 399 * {@link #onCreate} if the activity needs to be re-created. 400 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 401 * section for more information on how the lifecycle of a process is tied 402 * to the activities it is hosting. Note that it is important to save 403 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 404 * because the latter is not part of the lifecycle callbacks, so will not 405 * be called in every situation as described in its documentation.</p> 406 * 407 * <p class="note">Be aware that these semantics will change slightly between 408 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 409 * vs. those targeting prior platforms. Starting with Honeycomb, an application 410 * is not in the killable state until its {@link #onStop} has returned. This 411 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 412 * safely called after {@link #onPause()} and allows and application to safely 413 * wait until {@link #onStop()} to save persistent state.</p> 414 * 415 * <p>For those methods that are not marked as being killable, the activity's 416 * process will not be killed by the system starting from the time the method 417 * is called and continuing after it returns. Thus an activity is in the killable 418 * state, for example, between after <code>onPause()</code> to the start of 419 * <code>onResume()</code>.</p> 420 * 421 * <a name="ConfigurationChanges"></a> 422 * <h3>Configuration Changes</h3> 423 * 424 * <p>If the configuration of the device (as defined by the 425 * {@link Configuration Resources.Configuration} class) changes, 426 * then anything displaying a user interface will need to update to match that 427 * configuration. Because Activity is the primary mechanism for interacting 428 * with the user, it includes special support for handling configuration 429 * changes.</p> 430 * 431 * <p>Unless you specify otherwise, a configuration change (such as a change 432 * in screen orientation, language, input devices, etc) will cause your 433 * current activity to be <em>destroyed</em>, going through the normal activity 434 * lifecycle process of {@link #onPause}, 435 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 436 * had been in the foreground or visible to the user, once {@link #onDestroy} is 437 * called in that instance then a new instance of the activity will be 438 * created, with whatever savedInstanceState the previous instance had generated 439 * from {@link #onSaveInstanceState}.</p> 440 * 441 * <p>This is done because any application resource, 442 * including layout files, can change based on any configuration value. Thus 443 * the only safe way to handle a configuration change is to re-retrieve all 444 * resources, including layouts, drawables, and strings. Because activities 445 * must already know how to save their state and re-create themselves from 446 * that state, this is a convenient way to have an activity restart itself 447 * with a new configuration.</p> 448 * 449 * <p>In some special cases, you may want to bypass restarting of your 450 * activity based on one or more types of configuration changes. This is 451 * done with the {@link android.R.attr#configChanges android:configChanges} 452 * attribute in its manifest. For any types of configuration changes you say 453 * that you handle there, you will receive a call to your current activity's 454 * {@link #onConfigurationChanged} method instead of being restarted. If 455 * a configuration change involves any that you do not handle, however, the 456 * activity will still be restarted and {@link #onConfigurationChanged} 457 * will not be called.</p> 458 * 459 * <a name="StartingActivities"></a> 460 * <h3>Starting Activities and Getting Results</h3> 461 * 462 * <p>The {@link android.app.Activity#startActivity} 463 * method is used to start a 464 * new activity, which will be placed at the top of the activity stack. It 465 * takes a single argument, an {@link android.content.Intent Intent}, 466 * which describes the activity 467 * to be executed.</p> 468 * 469 * <p>Sometimes you want to get a result back from an activity when it 470 * ends. For example, you may start an activity that lets the user pick 471 * a person in a list of contacts; when it ends, it returns the person 472 * that was selected. To do this, you call the 473 * {@link android.app.Activity#startActivityForResult(Intent, int)} 474 * version with a second integer parameter identifying the call. The result 475 * will come back through your {@link android.app.Activity#onActivityResult} 476 * method.</p> 477 * 478 * <p>When an activity exits, it can call 479 * {@link android.app.Activity#setResult(int)} 480 * to return data back to its parent. It must always supply a result code, 481 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 482 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 483 * return back an Intent containing any additional data it wants. All of this 484 * information appears back on the 485 * parent's <code>Activity.onActivityResult()</code>, along with the integer 486 * identifier it originally supplied.</p> 487 * 488 * <p>If a child activity fails for any reason (such as crashing), the parent 489 * activity will receive a result with the code RESULT_CANCELED.</p> 490 * 491 * <pre class="prettyprint"> 492 * public class MyActivity extends Activity { 493 * ... 494 * 495 * static final int PICK_CONTACT_REQUEST = 0; 496 * 497 * public boolean onKeyDown(int keyCode, KeyEvent event) { 498 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 499 * // When the user center presses, let them pick a contact. 500 * startActivityForResult( 501 * new Intent(Intent.ACTION_PICK, 502 * new Uri("content://contacts")), 503 * PICK_CONTACT_REQUEST); 504 * return true; 505 * } 506 * return false; 507 * } 508 * 509 * protected void onActivityResult(int requestCode, int resultCode, 510 * Intent data) { 511 * if (requestCode == PICK_CONTACT_REQUEST) { 512 * if (resultCode == RESULT_OK) { 513 * // A contact was picked. Here we will just display it 514 * // to the user. 515 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 516 * } 517 * } 518 * } 519 * } 520 * </pre> 521 * 522 * <a name="SavingPersistentState"></a> 523 * <h3>Saving Persistent State</h3> 524 * 525 * <p>There are generally two kinds of persistent state than an activity 526 * will deal with: shared document-like data (typically stored in a SQLite 527 * database using a {@linkplain android.content.ContentProvider content provider}) 528 * and internal state such as user preferences.</p> 529 * 530 * <p>For content provider data, we suggest that activities use a 531 * "edit in place" user model. That is, any edits a user makes are effectively 532 * made immediately without requiring an additional confirmation step. 533 * Supporting this model is generally a simple matter of following two rules:</p> 534 * 535 * <ul> 536 * <li> <p>When creating a new document, the backing database entry or file for 537 * it is created immediately. For example, if the user chooses to write 538 * a new e-mail, a new entry for that e-mail is created as soon as they 539 * start entering data, so that if they go to any other activity after 540 * that point this e-mail will now appear in the list of drafts.</p> 541 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 542 * commit to the backing content provider or file any changes the user 543 * has made. This ensures that those changes will be seen by any other 544 * activity that is about to run. You will probably want to commit 545 * your data even more aggressively at key times during your 546 * activity's lifecycle: for example before starting a new 547 * activity, before finishing your own activity, when the user 548 * switches between input fields, etc.</p> 549 * </ul> 550 * 551 * <p>This model is designed to prevent data loss when a user is navigating 552 * between activities, and allows the system to safely kill an activity (because 553 * system resources are needed somewhere else) at any time after it has been 554 * paused. Note this implies 555 * that the user pressing BACK from your activity does <em>not</em> 556 * mean "cancel" -- it means to leave the activity with its current contents 557 * saved away. Canceling edits in an activity must be provided through 558 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 559 * 560 * <p>See the {@linkplain android.content.ContentProvider content package} for 561 * more information about content providers. These are a key aspect of how 562 * different activities invoke and propagate data between themselves.</p> 563 * 564 * <p>The Activity class also provides an API for managing internal persistent state 565 * associated with an activity. This can be used, for example, to remember 566 * the user's preferred initial display in a calendar (day view or week view) 567 * or the user's default home page in a web browser.</p> 568 * 569 * <p>Activity persistent state is managed 570 * with the method {@link #getPreferences}, 571 * allowing you to retrieve and 572 * modify a set of name/value pairs associated with the activity. To use 573 * preferences that are shared across multiple application components 574 * (activities, receivers, services, providers), you can use the underlying 575 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 576 * to retrieve a preferences 577 * object stored under a specific name. 578 * (Note that it is not possible to share settings data across application 579 * packages -- for that you will need a content provider.)</p> 580 * 581 * <p>Here is an excerpt from a calendar activity that stores the user's 582 * preferred view mode in its persistent settings:</p> 583 * 584 * <pre class="prettyprint"> 585 * public class CalendarActivity extends Activity { 586 * ... 587 * 588 * static final int DAY_VIEW_MODE = 0; 589 * static final int WEEK_VIEW_MODE = 1; 590 * 591 * private SharedPreferences mPrefs; 592 * private int mCurViewMode; 593 * 594 * protected void onCreate(Bundle savedInstanceState) { 595 * super.onCreate(savedInstanceState); 596 * 597 * SharedPreferences mPrefs = getSharedPreferences(); 598 * mCurViewMode = mPrefs.getInt("view_mode", DAY_VIEW_MODE); 599 * } 600 * 601 * protected void onPause() { 602 * super.onPause(); 603 * 604 * SharedPreferences.Editor ed = mPrefs.edit(); 605 * ed.putInt("view_mode", mCurViewMode); 606 * ed.commit(); 607 * } 608 * } 609 * </pre> 610 * 611 * <a name="Permissions"></a> 612 * <h3>Permissions</h3> 613 * 614 * <p>The ability to start a particular Activity can be enforced when it is 615 * declared in its 616 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 617 * tag. By doing so, other applications will need to declare a corresponding 618 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 619 * element in their own manifest to be able to start that activity. 620 * 621 * <p>When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 622 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 623 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the 624 * Activity access to the specific URIs in the Intent. Access will remain 625 * until the Activity has finished (it will remain across the hosting 626 * process being killed and other temporary destruction). As of 627 * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity 628 * was already created and a new Intent is being delivered to 629 * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added 630 * to the existing ones it holds. 631 * 632 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 633 * document for more information on permissions and security in general. 634 * 635 * <a name="ProcessLifecycle"></a> 636 * <h3>Process Lifecycle</h3> 637 * 638 * <p>The Android system attempts to keep application process around for as 639 * long as possible, but eventually will need to remove old processes when 640 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 641 * Lifecycle</a>, the decision about which process to remove is intimately 642 * tied to the state of the user's interaction with it. In general, there 643 * are four states a process can be in based on the activities running in it, 644 * listed here in order of importance. The system will kill less important 645 * processes (the last ones) before it resorts to killing more important 646 * processes (the first ones). 647 * 648 * <ol> 649 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 650 * that the user is currently interacting with) is considered the most important. 651 * Its process will only be killed as a last resort, if it uses more memory 652 * than is available on the device. Generally at this point the device has 653 * reached a memory paging state, so this is required in order to keep the user 654 * interface responsive. 655 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 656 * but not in the foreground, such as one sitting behind a foreground dialog) 657 * is considered extremely important and will not be killed unless that is 658 * required to keep the foreground activity running. 659 * <li> <p>A <b>background activity</b> (an activity that is not visible to 660 * the user and has been paused) is no longer critical, so the system may 661 * safely kill its process to reclaim memory for other foreground or 662 * visible processes. If its process needs to be killed, when the user navigates 663 * back to the activity (making it visible on the screen again), its 664 * {@link #onCreate} method will be called with the savedInstanceState it had previously 665 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 666 * state as the user last left it. 667 * <li> <p>An <b>empty process</b> is one hosting no activities or other 668 * application components (such as {@link Service} or 669 * {@link android.content.BroadcastReceiver} classes). These are killed very 670 * quickly by the system as memory becomes low. For this reason, any 671 * background operation you do outside of an activity must be executed in the 672 * context of an activity BroadcastReceiver or Service to ensure that the system 673 * knows it needs to keep your process around. 674 * </ol> 675 * 676 * <p>Sometimes an Activity may need to do a long-running operation that exists 677 * independently of the activity lifecycle itself. An example may be a camera 678 * application that allows you to upload a picture to a web site. The upload 679 * may take a long time, and the application should allow the user to leave 680 * the application will it is executing. To accomplish this, your Activity 681 * should start a {@link Service} in which the upload takes place. This allows 682 * the system to properly prioritize your process (considering it to be more 683 * important than other non-visible applications) for the duration of the 684 * upload, independent of whether the original activity is paused, stopped, 685 * or finished. 686 */ 687public class Activity extends ContextThemeWrapper 688 implements LayoutInflater.Factory2, 689 Window.Callback, KeyEvent.Callback, 690 OnCreateContextMenuListener, ComponentCallbacks2, 691 Window.OnWindowDismissedCallback, WindowControllerCallback { 692 private static final String TAG = "Activity"; 693 private static final boolean DEBUG_LIFECYCLE = false; 694 695 /** Standard activity result: operation canceled. */ 696 public static final int RESULT_CANCELED = 0; 697 /** Standard activity result: operation succeeded. */ 698 public static final int RESULT_OK = -1; 699 /** Start of user-defined activity results. */ 700 public static final int RESULT_FIRST_USER = 1; 701 702 /** @hide Task isn't finished when activity is finished */ 703 public static final int DONT_FINISH_TASK_WITH_ACTIVITY = 0; 704 /** 705 * @hide Task is finished if the finishing activity is the root of the task. To preserve the 706 * past behavior the task is also removed from recents. 707 */ 708 public static final int FINISH_TASK_WITH_ROOT_ACTIVITY = 1; 709 /** 710 * @hide Task is finished along with the finishing activity, but it is not removed from 711 * recents. 712 */ 713 public static final int FINISH_TASK_WITH_ACTIVITY = 2; 714 715 static final String FRAGMENTS_TAG = "android:fragments"; 716 717 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 718 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 719 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 720 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 721 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 722 private static final String HAS_CURENT_PERMISSIONS_REQUEST_KEY = 723 "android:hasCurrentPermissionsRequest"; 724 725 private static final String REQUEST_PERMISSIONS_WHO_PREFIX = "@android:requestPermissions:"; 726 727 private static class ManagedDialog { 728 Dialog mDialog; 729 Bundle mArgs; 730 } 731 private SparseArray<ManagedDialog> mManagedDialogs; 732 733 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 734 private Instrumentation mInstrumentation; 735 private IBinder mToken; 736 private int mIdent; 737 /*package*/ String mEmbeddedID; 738 private Application mApplication; 739 /*package*/ Intent mIntent; 740 /*package*/ String mReferrer; 741 private ComponentName mComponent; 742 /*package*/ ActivityInfo mActivityInfo; 743 /*package*/ ActivityThread mMainThread; 744 Activity mParent; 745 boolean mCalled; 746 /*package*/ boolean mResumed; 747 private boolean mStopped; 748 boolean mFinished; 749 boolean mStartedActivity; 750 private boolean mDestroyed; 751 private boolean mDoReportFullyDrawn = true; 752 /** true if the activity is going through a transient pause */ 753 /*package*/ boolean mTemporaryPause = false; 754 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 755 /*package*/ boolean mChangingConfigurations = false; 756 /*package*/ int mConfigChangeFlags; 757 /*package*/ Configuration mCurrentConfig; 758 private SearchManager mSearchManager; 759 private MenuInflater mMenuInflater; 760 761 static final class NonConfigurationInstances { 762 Object activity; 763 HashMap<String, Object> children; 764 FragmentManagerNonConfig fragments; 765 ArrayMap<String, LoaderManager> loaders; 766 VoiceInteractor voiceInteractor; 767 } 768 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 769 770 private Window mWindow; 771 772 private WindowManager mWindowManager; 773 /*package*/ View mDecor = null; 774 /*package*/ boolean mWindowAdded = false; 775 /*package*/ boolean mVisibleFromServer = false; 776 /*package*/ boolean mVisibleFromClient = true; 777 /*package*/ ActionBar mActionBar = null; 778 private boolean mEnableDefaultActionBarUp; 779 780 private VoiceInteractor mVoiceInteractor; 781 782 private CharSequence mTitle; 783 private int mTitleColor = 0; 784 785 // we must have a handler before the FragmentController is constructed 786 final Handler mHandler = new Handler(); 787 final FragmentController mFragments = FragmentController.createController(new HostCallbacks()); 788 789 // Most recent call to requestVisibleBehind(). 790 boolean mVisibleBehind; 791 792 private static final class ManagedCursor { 793 ManagedCursor(Cursor cursor) { 794 mCursor = cursor; 795 mReleased = false; 796 mUpdated = false; 797 } 798 799 private final Cursor mCursor; 800 private boolean mReleased; 801 private boolean mUpdated; 802 } 803 private final ArrayList<ManagedCursor> mManagedCursors = 804 new ArrayList<ManagedCursor>(); 805 806 // protected by synchronized (this) 807 int mResultCode = RESULT_CANCELED; 808 Intent mResultData = null; 809 810 private TranslucentConversionListener mTranslucentCallback; 811 private boolean mChangeCanvasToTranslucent; 812 813 private SearchEvent mSearchEvent; 814 815 private boolean mTitleReady = false; 816 private int mActionModeTypeStarting = ActionMode.TYPE_PRIMARY; 817 818 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 819 private SpannableStringBuilder mDefaultKeySsb = null; 820 821 private ActivityManager.TaskDescription mTaskDescription = 822 new ActivityManager.TaskDescription(); 823 824 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 825 826 @SuppressWarnings("unused") 827 private final Object mInstanceTracker = StrictMode.trackActivity(this); 828 829 private Thread mUiThread; 830 831 ActivityTransitionState mActivityTransitionState = new ActivityTransitionState(); 832 SharedElementCallback mEnterTransitionListener = SharedElementCallback.NULL_CALLBACK; 833 SharedElementCallback mExitTransitionListener = SharedElementCallback.NULL_CALLBACK; 834 835 private boolean mHasCurrentPermissionsRequest; 836 private boolean mEatKeyUpEvent; 837 838 private static native String getDlWarning(); 839 840 /** Return the intent that started this activity. */ 841 public Intent getIntent() { 842 return mIntent; 843 } 844 845 /** 846 * Change the intent returned by {@link #getIntent}. This holds a 847 * reference to the given intent; it does not copy it. Often used in 848 * conjunction with {@link #onNewIntent}. 849 * 850 * @param newIntent The new Intent object to return from getIntent 851 * 852 * @see #getIntent 853 * @see #onNewIntent 854 */ 855 public void setIntent(Intent newIntent) { 856 mIntent = newIntent; 857 } 858 859 /** Return the application that owns this activity. */ 860 public final Application getApplication() { 861 return mApplication; 862 } 863 864 /** Is this activity embedded inside of another activity? */ 865 public final boolean isChild() { 866 return mParent != null; 867 } 868 869 /** Return the parent activity if this view is an embedded child. */ 870 public final Activity getParent() { 871 return mParent; 872 } 873 874 /** Retrieve the window manager for showing custom windows. */ 875 public WindowManager getWindowManager() { 876 return mWindowManager; 877 } 878 879 /** 880 * Retrieve the current {@link android.view.Window} for the activity. 881 * This can be used to directly access parts of the Window API that 882 * are not available through Activity/Screen. 883 * 884 * @return Window The current window, or null if the activity is not 885 * visual. 886 */ 887 public Window getWindow() { 888 return mWindow; 889 } 890 891 /** 892 * Return the LoaderManager for this activity, creating it if needed. 893 */ 894 public LoaderManager getLoaderManager() { 895 return mFragments.getLoaderManager(); 896 } 897 898 /** 899 * Calls {@link android.view.Window#getCurrentFocus} on the 900 * Window of this Activity to return the currently focused view. 901 * 902 * @return View The current View with focus or null. 903 * 904 * @see #getWindow 905 * @see android.view.Window#getCurrentFocus 906 */ 907 @Nullable 908 public View getCurrentFocus() { 909 return mWindow != null ? mWindow.getCurrentFocus() : null; 910 } 911 912 /** 913 * Called when the activity is starting. This is where most initialization 914 * should go: calling {@link #setContentView(int)} to inflate the 915 * activity's UI, using {@link #findViewById} to programmatically interact 916 * with widgets in the UI, calling 917 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 918 * cursors for data being displayed, etc. 919 * 920 * <p>You can call {@link #finish} from within this function, in 921 * which case onDestroy() will be immediately called without any of the rest 922 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 923 * {@link #onPause}, etc) executing. 924 * 925 * <p><em>Derived classes must call through to the super class's 926 * implementation of this method. If they do not, an exception will be 927 * thrown.</em></p> 928 * 929 * @param savedInstanceState If the activity is being re-initialized after 930 * previously being shut down then this Bundle contains the data it most 931 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 932 * 933 * @see #onStart 934 * @see #onSaveInstanceState 935 * @see #onRestoreInstanceState 936 * @see #onPostCreate 937 */ 938 @MainThread 939 @CallSuper 940 protected void onCreate(@Nullable Bundle savedInstanceState) { 941 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState); 942 if (mLastNonConfigurationInstances != null) { 943 mFragments.restoreLoaderNonConfig(mLastNonConfigurationInstances.loaders); 944 } 945 if (mActivityInfo.parentActivityName != null) { 946 if (mActionBar == null) { 947 mEnableDefaultActionBarUp = true; 948 } else { 949 mActionBar.setDefaultDisplayHomeAsUpEnabled(true); 950 } 951 } 952 if (savedInstanceState != null) { 953 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 954 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 955 ? mLastNonConfigurationInstances.fragments : null); 956 } 957 mFragments.dispatchCreate(); 958 getApplication().dispatchActivityCreated(this, savedInstanceState); 959 if (mVoiceInteractor != null) { 960 mVoiceInteractor.attachActivity(this); 961 } 962 mCalled = true; 963 } 964 965 /** 966 * Same as {@link #onCreate(android.os.Bundle)} but called for those activities created with 967 * the attribute {@link android.R.attr#persistableMode} set to 968 * <code>persistAcrossReboots</code>. 969 * 970 * @param savedInstanceState if the activity is being re-initialized after 971 * previously being shut down then this Bundle contains the data it most 972 * recently supplied in {@link #onSaveInstanceState}. 973 * <b><i>Note: Otherwise it is null.</i></b> 974 * @param persistentState if the activity is being re-initialized after 975 * previously being shut down or powered off then this Bundle contains the data it most 976 * recently supplied to outPersistentState in {@link #onSaveInstanceState}. 977 * <b><i>Note: Otherwise it is null.</i></b> 978 * 979 * @see #onCreate(android.os.Bundle) 980 * @see #onStart 981 * @see #onSaveInstanceState 982 * @see #onRestoreInstanceState 983 * @see #onPostCreate 984 */ 985 public void onCreate(@Nullable Bundle savedInstanceState, 986 @Nullable PersistableBundle persistentState) { 987 onCreate(savedInstanceState); 988 } 989 990 /** 991 * The hook for {@link ActivityThread} to restore the state of this activity. 992 * 993 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 994 * {@link #restoreManagedDialogs(android.os.Bundle)}. 995 * 996 * @param savedInstanceState contains the saved state 997 */ 998 final void performRestoreInstanceState(Bundle savedInstanceState) { 999 onRestoreInstanceState(savedInstanceState); 1000 restoreManagedDialogs(savedInstanceState); 1001 } 1002 1003 /** 1004 * The hook for {@link ActivityThread} to restore the state of this activity. 1005 * 1006 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 1007 * {@link #restoreManagedDialogs(android.os.Bundle)}. 1008 * 1009 * @param savedInstanceState contains the saved state 1010 * @param persistentState contains the persistable saved state 1011 */ 1012 final void performRestoreInstanceState(Bundle savedInstanceState, 1013 PersistableBundle persistentState) { 1014 onRestoreInstanceState(savedInstanceState, persistentState); 1015 if (savedInstanceState != null) { 1016 restoreManagedDialogs(savedInstanceState); 1017 } 1018 } 1019 1020 /** 1021 * This method is called after {@link #onStart} when the activity is 1022 * being re-initialized from a previously saved state, given here in 1023 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 1024 * to restore their state, but it is sometimes convenient to do it here 1025 * after all of the initialization has been done or to allow subclasses to 1026 * decide whether to use your default implementation. The default 1027 * implementation of this method performs a restore of any view state that 1028 * had previously been frozen by {@link #onSaveInstanceState}. 1029 * 1030 * <p>This method is called between {@link #onStart} and 1031 * {@link #onPostCreate}. 1032 * 1033 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1034 * 1035 * @see #onCreate 1036 * @see #onPostCreate 1037 * @see #onResume 1038 * @see #onSaveInstanceState 1039 */ 1040 protected void onRestoreInstanceState(Bundle savedInstanceState) { 1041 if (mWindow != null) { 1042 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 1043 if (windowState != null) { 1044 mWindow.restoreHierarchyState(windowState); 1045 } 1046 } 1047 } 1048 1049 /** 1050 * This is the same as {@link #onRestoreInstanceState(Bundle)} but is called for activities 1051 * created with the attribute {@link android.R.attr#persistableMode} set to 1052 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1053 * came from the restored PersistableBundle first 1054 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1055 * 1056 * <p>This method is called between {@link #onStart} and 1057 * {@link #onPostCreate}. 1058 * 1059 * <p>If this method is called {@link #onRestoreInstanceState(Bundle)} will not be called. 1060 * 1061 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1062 * @param persistentState the data most recently supplied in {@link #onSaveInstanceState}. 1063 * 1064 * @see #onRestoreInstanceState(Bundle) 1065 * @see #onCreate 1066 * @see #onPostCreate 1067 * @see #onResume 1068 * @see #onSaveInstanceState 1069 */ 1070 public void onRestoreInstanceState(Bundle savedInstanceState, 1071 PersistableBundle persistentState) { 1072 if (savedInstanceState != null) { 1073 onRestoreInstanceState(savedInstanceState); 1074 } 1075 } 1076 1077 /** 1078 * Restore the state of any saved managed dialogs. 1079 * 1080 * @param savedInstanceState The bundle to restore from. 1081 */ 1082 private void restoreManagedDialogs(Bundle savedInstanceState) { 1083 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 1084 if (b == null) { 1085 return; 1086 } 1087 1088 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 1089 final int numDialogs = ids.length; 1090 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 1091 for (int i = 0; i < numDialogs; i++) { 1092 final Integer dialogId = ids[i]; 1093 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 1094 if (dialogState != null) { 1095 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 1096 // so tell createDialog() not to do it, otherwise we get an exception 1097 final ManagedDialog md = new ManagedDialog(); 1098 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 1099 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 1100 if (md.mDialog != null) { 1101 mManagedDialogs.put(dialogId, md); 1102 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 1103 md.mDialog.onRestoreInstanceState(dialogState); 1104 } 1105 } 1106 } 1107 } 1108 1109 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 1110 final Dialog dialog = onCreateDialog(dialogId, args); 1111 if (dialog == null) { 1112 return null; 1113 } 1114 dialog.dispatchOnCreate(state); 1115 return dialog; 1116 } 1117 1118 private static String savedDialogKeyFor(int key) { 1119 return SAVED_DIALOG_KEY_PREFIX + key; 1120 } 1121 1122 private static String savedDialogArgsKeyFor(int key) { 1123 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 1124 } 1125 1126 /** 1127 * Called when activity start-up is complete (after {@link #onStart} 1128 * and {@link #onRestoreInstanceState} have been called). Applications will 1129 * generally not implement this method; it is intended for system 1130 * classes to do final initialization after application code has run. 1131 * 1132 * <p><em>Derived classes must call through to the super class's 1133 * implementation of this method. If they do not, an exception will be 1134 * thrown.</em></p> 1135 * 1136 * @param savedInstanceState If the activity is being re-initialized after 1137 * previously being shut down then this Bundle contains the data it most 1138 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1139 * @see #onCreate 1140 */ 1141 @CallSuper 1142 protected void onPostCreate(@Nullable Bundle savedInstanceState) { 1143 if (!isChild()) { 1144 mTitleReady = true; 1145 onTitleChanged(getTitle(), getTitleColor()); 1146 } 1147 1148 mCalled = true; 1149 } 1150 1151 /** 1152 * This is the same as {@link #onPostCreate(Bundle)} but is called for activities 1153 * created with the attribute {@link android.R.attr#persistableMode} set to 1154 * <code>persistAcrossReboots</code>. 1155 * 1156 * @param savedInstanceState The data most recently supplied in {@link #onSaveInstanceState} 1157 * @param persistentState The data caming from the PersistableBundle first 1158 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1159 * 1160 * @see #onCreate 1161 */ 1162 public void onPostCreate(@Nullable Bundle savedInstanceState, 1163 @Nullable PersistableBundle persistentState) { 1164 onPostCreate(savedInstanceState); 1165 } 1166 1167 /** 1168 * Called after {@link #onCreate} — or after {@link #onRestart} when 1169 * the activity had been stopped, but is now again being displayed to the 1170 * user. It will be followed by {@link #onResume}. 1171 * 1172 * <p><em>Derived classes must call through to the super class's 1173 * implementation of this method. If they do not, an exception will be 1174 * thrown.</em></p> 1175 * 1176 * @see #onCreate 1177 * @see #onStop 1178 * @see #onResume 1179 */ 1180 @CallSuper 1181 protected void onStart() { 1182 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStart " + this); 1183 mCalled = true; 1184 1185 mFragments.doLoaderStart(); 1186 1187 getApplication().dispatchActivityStarted(this); 1188 } 1189 1190 /** 1191 * Called after {@link #onStop} when the current activity is being 1192 * re-displayed to the user (the user has navigated back to it). It will 1193 * be followed by {@link #onStart} and then {@link #onResume}. 1194 * 1195 * <p>For activities that are using raw {@link Cursor} objects (instead of 1196 * creating them through 1197 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1198 * this is usually the place 1199 * where the cursor should be requeried (because you had deactivated it in 1200 * {@link #onStop}. 1201 * 1202 * <p><em>Derived classes must call through to the super class's 1203 * implementation of this method. If they do not, an exception will be 1204 * thrown.</em></p> 1205 * 1206 * @see #onStop 1207 * @see #onStart 1208 * @see #onResume 1209 */ 1210 @CallSuper 1211 protected void onRestart() { 1212 mCalled = true; 1213 } 1214 1215 /** 1216 * Called when an {@link #onResume} is coming up, prior to other pre-resume callbacks 1217 * such as {@link #onNewIntent} and {@link #onActivityResult}. This is primarily intended 1218 * to give the activity a hint that its state is no longer saved -- it will generally 1219 * be called after {@link #onSaveInstanceState} and prior to the activity being 1220 * resumed/started again. 1221 */ 1222 public void onStateNotSaved() { 1223 } 1224 1225 /** 1226 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1227 * {@link #onPause}, for your activity to start interacting with the user. 1228 * This is a good place to begin animations, open exclusive-access devices 1229 * (such as the camera), etc. 1230 * 1231 * <p>Keep in mind that onResume is not the best indicator that your activity 1232 * is visible to the user; a system window such as the keyguard may be in 1233 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1234 * activity is visible to the user (for example, to resume a game). 1235 * 1236 * <p><em>Derived classes must call through to the super class's 1237 * implementation of this method. If they do not, an exception will be 1238 * thrown.</em></p> 1239 * 1240 * @see #onRestoreInstanceState 1241 * @see #onRestart 1242 * @see #onPostResume 1243 * @see #onPause 1244 */ 1245 @CallSuper 1246 protected void onResume() { 1247 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this); 1248 getApplication().dispatchActivityResumed(this); 1249 mActivityTransitionState.onResume(); 1250 mCalled = true; 1251 } 1252 1253 /** 1254 * Called when activity resume is complete (after {@link #onResume} has 1255 * been called). Applications will generally not implement this method; 1256 * it is intended for system classes to do final setup after application 1257 * resume code has run. 1258 * 1259 * <p><em>Derived classes must call through to the super class's 1260 * implementation of this method. If they do not, an exception will be 1261 * thrown.</em></p> 1262 * 1263 * @see #onResume 1264 */ 1265 @CallSuper 1266 protected void onPostResume() { 1267 final Window win = getWindow(); 1268 if (win != null) win.makeActive(); 1269 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1270 mCalled = true; 1271 } 1272 1273 void setVoiceInteractor(IVoiceInteractor voiceInteractor) { 1274 if (voiceInteractor == null) { 1275 mVoiceInteractor = null; 1276 } else { 1277 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 1278 Looper.myLooper()); 1279 } 1280 } 1281 1282 /** 1283 * Check whether this activity is running as part of a voice interaction with the user. 1284 * If true, it should perform its interaction with the user through the 1285 * {@link VoiceInteractor} returned by {@link #getVoiceInteractor}. 1286 */ 1287 public boolean isVoiceInteraction() { 1288 return mVoiceInteractor != null; 1289 } 1290 1291 /** 1292 * Like {@link #isVoiceInteraction}, but only returns true if this is also the root 1293 * of a voice interaction. That is, returns true if this activity was directly 1294 * started by the voice interaction service as the initiation of a voice interaction. 1295 * Otherwise, for example if it was started by another activity while under voice 1296 * interaction, returns false. 1297 */ 1298 public boolean isVoiceInteractionRoot() { 1299 try { 1300 return mVoiceInteractor != null 1301 && ActivityManagerNative.getDefault().isRootVoiceInteraction(mToken); 1302 } catch (RemoteException e) { 1303 } 1304 return false; 1305 } 1306 1307 /** 1308 * Retrieve the active {@link VoiceInteractor} that the user is going through to 1309 * interact with this activity. 1310 */ 1311 public VoiceInteractor getVoiceInteractor() { 1312 return mVoiceInteractor; 1313 } 1314 1315 /** 1316 * Queries whether the currently enabled voice interaction service supports returning 1317 * a voice interactor for use by the activity. This is valid only for the duration of the 1318 * activity. 1319 * 1320 * @return whether the current voice interaction service supports local voice interaction 1321 */ 1322 public boolean isLocalVoiceInteractionSupported() { 1323 try { 1324 return ActivityManagerNative.getDefault().supportsLocalVoiceInteraction(); 1325 } catch (RemoteException re) { 1326 } 1327 return false; 1328 } 1329 1330 /** 1331 * Starts a local voice interaction session. When ready, 1332 * {@link #onLocalVoiceInteractionStarted()} is called. You can pass a bundle of private options 1333 * to the registered voice interaction service. 1334 * @param privateOptions a Bundle of private arguments to the current voice interaction service 1335 */ 1336 public void startLocalVoiceInteraction(Bundle privateOptions) { 1337 try { 1338 ActivityManagerNative.getDefault().startLocalVoiceInteraction(mToken, privateOptions); 1339 } catch (RemoteException re) { 1340 } 1341 } 1342 1343 /** 1344 * Callback to indicate that {@link #startLocalVoiceInteraction(Bundle)} has resulted in a 1345 * voice interaction session being started. You can now retrieve a voice interactor using 1346 * {@link #getVoiceInteractor()}. 1347 */ 1348 public void onLocalVoiceInteractionStarted() { 1349 Log.i(TAG, "onLocalVoiceInteractionStarted! " + getVoiceInteractor()); 1350 } 1351 1352 /** 1353 * Callback to indicate that the local voice interaction has stopped for some 1354 * reason. 1355 */ 1356 public void onLocalVoiceInteractionStopped() { 1357 Log.i(TAG, "onLocalVoiceInteractionStopped :( " + getVoiceInteractor()); 1358 } 1359 1360 /** 1361 * Request to terminate the current voice interaction that was previously started 1362 * using {@link #startLocalVoiceInteraction(Bundle)}. 1363 */ 1364 public void stopLocalVoiceInteraction() { 1365 try { 1366 ActivityManagerNative.getDefault().stopLocalVoiceInteraction(mToken); 1367 } catch (RemoteException re) { 1368 } 1369 } 1370 1371 /** 1372 * This is called for activities that set launchMode to "singleTop" in 1373 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1374 * flag when calling {@link #startActivity}. In either case, when the 1375 * activity is re-launched while at the top of the activity stack instead 1376 * of a new instance of the activity being started, onNewIntent() will be 1377 * called on the existing instance with the Intent that was used to 1378 * re-launch it. 1379 * 1380 * <p>An activity will always be paused before receiving a new intent, so 1381 * you can count on {@link #onResume} being called after this method. 1382 * 1383 * <p>Note that {@link #getIntent} still returns the original Intent. You 1384 * can use {@link #setIntent} to update it to this new Intent. 1385 * 1386 * @param intent The new intent that was started for the activity. 1387 * 1388 * @see #getIntent 1389 * @see #setIntent 1390 * @see #onResume 1391 */ 1392 protected void onNewIntent(Intent intent) { 1393 } 1394 1395 /** 1396 * The hook for {@link ActivityThread} to save the state of this activity. 1397 * 1398 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1399 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1400 * 1401 * @param outState The bundle to save the state to. 1402 */ 1403 final void performSaveInstanceState(Bundle outState) { 1404 onSaveInstanceState(outState); 1405 saveManagedDialogs(outState); 1406 mActivityTransitionState.saveState(outState); 1407 storeHasCurrentPermissionRequest(outState); 1408 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState); 1409 } 1410 1411 /** 1412 * The hook for {@link ActivityThread} to save the state of this activity. 1413 * 1414 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1415 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1416 * 1417 * @param outState The bundle to save the state to. 1418 * @param outPersistentState The bundle to save persistent state to. 1419 */ 1420 final void performSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1421 onSaveInstanceState(outState, outPersistentState); 1422 saveManagedDialogs(outState); 1423 storeHasCurrentPermissionRequest(outState); 1424 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState + 1425 ", " + outPersistentState); 1426 } 1427 1428 /** 1429 * Called to retrieve per-instance state from an activity before being killed 1430 * so that the state can be restored in {@link #onCreate} or 1431 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1432 * will be passed to both). 1433 * 1434 * <p>This method is called before an activity may be killed so that when it 1435 * comes back some time in the future it can restore its state. For example, 1436 * if activity B is launched in front of activity A, and at some point activity 1437 * A is killed to reclaim resources, activity A will have a chance to save the 1438 * current state of its user interface via this method so that when the user 1439 * returns to activity A, the state of the user interface can be restored 1440 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1441 * 1442 * <p>Do not confuse this method with activity lifecycle callbacks such as 1443 * {@link #onPause}, which is always called when an activity is being placed 1444 * in the background or on its way to destruction, or {@link #onStop} which 1445 * is called before destruction. One example of when {@link #onPause} and 1446 * {@link #onStop} is called and not this method is when a user navigates back 1447 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1448 * on B because that particular instance will never be restored, so the 1449 * system avoids calling it. An example when {@link #onPause} is called and 1450 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1451 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1452 * killed during the lifetime of B since the state of the user interface of 1453 * A will stay intact. 1454 * 1455 * <p>The default implementation takes care of most of the UI per-instance 1456 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1457 * view in the hierarchy that has an id, and by saving the id of the currently 1458 * focused view (all of which is restored by the default implementation of 1459 * {@link #onRestoreInstanceState}). If you override this method to save additional 1460 * information not captured by each individual view, you will likely want to 1461 * call through to the default implementation, otherwise be prepared to save 1462 * all of the state of each view yourself. 1463 * 1464 * <p>If called, this method will occur before {@link #onStop}. There are 1465 * no guarantees about whether it will occur before or after {@link #onPause}. 1466 * 1467 * @param outState Bundle in which to place your saved state. 1468 * 1469 * @see #onCreate 1470 * @see #onRestoreInstanceState 1471 * @see #onPause 1472 */ 1473 protected void onSaveInstanceState(Bundle outState) { 1474 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1475 Parcelable p = mFragments.saveAllState(); 1476 if (p != null) { 1477 outState.putParcelable(FRAGMENTS_TAG, p); 1478 } 1479 getApplication().dispatchActivitySaveInstanceState(this, outState); 1480 } 1481 1482 /** 1483 * This is the same as {@link #onSaveInstanceState} but is called for activities 1484 * created with the attribute {@link android.R.attr#persistableMode} set to 1485 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1486 * in will be saved and presented in {@link #onCreate(Bundle, PersistableBundle)} 1487 * the first time that this activity is restarted following the next device reboot. 1488 * 1489 * @param outState Bundle in which to place your saved state. 1490 * @param outPersistentState State which will be saved across reboots. 1491 * 1492 * @see #onSaveInstanceState(Bundle) 1493 * @see #onCreate 1494 * @see #onRestoreInstanceState(Bundle, PersistableBundle) 1495 * @see #onPause 1496 */ 1497 public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1498 onSaveInstanceState(outState); 1499 } 1500 1501 /** 1502 * Save the state of any managed dialogs. 1503 * 1504 * @param outState place to store the saved state. 1505 */ 1506 private void saveManagedDialogs(Bundle outState) { 1507 if (mManagedDialogs == null) { 1508 return; 1509 } 1510 1511 final int numDialogs = mManagedDialogs.size(); 1512 if (numDialogs == 0) { 1513 return; 1514 } 1515 1516 Bundle dialogState = new Bundle(); 1517 1518 int[] ids = new int[mManagedDialogs.size()]; 1519 1520 // save each dialog's bundle, gather the ids 1521 for (int i = 0; i < numDialogs; i++) { 1522 final int key = mManagedDialogs.keyAt(i); 1523 ids[i] = key; 1524 final ManagedDialog md = mManagedDialogs.valueAt(i); 1525 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1526 if (md.mArgs != null) { 1527 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1528 } 1529 } 1530 1531 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1532 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1533 } 1534 1535 1536 /** 1537 * Called as part of the activity lifecycle when an activity is going into 1538 * the background, but has not (yet) been killed. The counterpart to 1539 * {@link #onResume}. 1540 * 1541 * <p>When activity B is launched in front of activity A, this callback will 1542 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1543 * so be sure to not do anything lengthy here. 1544 * 1545 * <p>This callback is mostly used for saving any persistent state the 1546 * activity is editing, to present a "edit in place" model to the user and 1547 * making sure nothing is lost if there are not enough resources to start 1548 * the new activity without first killing this one. This is also a good 1549 * place to do things like stop animations and other things that consume a 1550 * noticeable amount of CPU in order to make the switch to the next activity 1551 * as fast as possible, or to close resources that are exclusive access 1552 * such as the camera. 1553 * 1554 * <p>In situations where the system needs more memory it may kill paused 1555 * processes to reclaim resources. Because of this, you should be sure 1556 * that all of your state is saved by the time you return from 1557 * this function. In general {@link #onSaveInstanceState} is used to save 1558 * per-instance state in the activity and this method is used to store 1559 * global persistent data (in content providers, files, etc.) 1560 * 1561 * <p>After receiving this call you will usually receive a following call 1562 * to {@link #onStop} (after the next activity has been resumed and 1563 * displayed), however in some cases there will be a direct call back to 1564 * {@link #onResume} without going through the stopped state. 1565 * 1566 * <p><em>Derived classes must call through to the super class's 1567 * implementation of this method. If they do not, an exception will be 1568 * thrown.</em></p> 1569 * 1570 * @see #onResume 1571 * @see #onSaveInstanceState 1572 * @see #onStop 1573 */ 1574 @CallSuper 1575 protected void onPause() { 1576 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this); 1577 getApplication().dispatchActivityPaused(this); 1578 mCalled = true; 1579 } 1580 1581 /** 1582 * Called as part of the activity lifecycle when an activity is about to go 1583 * into the background as the result of user choice. For example, when the 1584 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1585 * when an incoming phone call causes the in-call Activity to be automatically 1586 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1587 * the activity being interrupted. In cases when it is invoked, this method 1588 * is called right before the activity's {@link #onPause} callback. 1589 * 1590 * <p>This callback and {@link #onUserInteraction} are intended to help 1591 * activities manage status bar notifications intelligently; specifically, 1592 * for helping activities determine the proper time to cancel a notfication. 1593 * 1594 * @see #onUserInteraction() 1595 */ 1596 protected void onUserLeaveHint() { 1597 } 1598 1599 /** 1600 * Generate a new thumbnail for this activity. This method is called before 1601 * pausing the activity, and should draw into <var>outBitmap</var> the 1602 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1603 * can use the given <var>canvas</var>, which is configured to draw into the 1604 * bitmap, for rendering if desired. 1605 * 1606 * <p>The default implementation returns fails and does not draw a thumbnail; 1607 * this will result in the platform creating its own thumbnail if needed. 1608 * 1609 * @param outBitmap The bitmap to contain the thumbnail. 1610 * @param canvas Can be used to render into the bitmap. 1611 * 1612 * @return Return true if you have drawn into the bitmap; otherwise after 1613 * you return it will be filled with a default thumbnail. 1614 * 1615 * @see #onCreateDescription 1616 * @see #onSaveInstanceState 1617 * @see #onPause 1618 */ 1619 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1620 return false; 1621 } 1622 1623 /** 1624 * Generate a new description for this activity. This method is called 1625 * before pausing the activity and can, if desired, return some textual 1626 * description of its current state to be displayed to the user. 1627 * 1628 * <p>The default implementation returns null, which will cause you to 1629 * inherit the description from the previous activity. If all activities 1630 * return null, generally the label of the top activity will be used as the 1631 * description. 1632 * 1633 * @return A description of what the user is doing. It should be short and 1634 * sweet (only a few words). 1635 * 1636 * @see #onCreateThumbnail 1637 * @see #onSaveInstanceState 1638 * @see #onPause 1639 */ 1640 @Nullable 1641 public CharSequence onCreateDescription() { 1642 return null; 1643 } 1644 1645 /** 1646 * This is called when the user is requesting an assist, to build a full 1647 * {@link Intent#ACTION_ASSIST} Intent with all of the context of the current 1648 * application. You can override this method to place into the bundle anything 1649 * you would like to appear in the {@link Intent#EXTRA_ASSIST_CONTEXT} part 1650 * of the assist Intent. 1651 * 1652 * <p>This function will be called after any global assist callbacks that had 1653 * been registered with {@link Application#registerOnProvideAssistDataListener 1654 * Application.registerOnProvideAssistDataListener}. 1655 */ 1656 public void onProvideAssistData(Bundle data) { 1657 } 1658 1659 /** 1660 * This is called when the user is requesting an assist, to provide references 1661 * to content related to the current activity. Before being called, the 1662 * {@code outContent} Intent is filled with the base Intent of the activity (the Intent 1663 * returned by {@link #getIntent()}). The Intent's extras are stripped of any types 1664 * that are not valid for {@link PersistableBundle} or non-framework Parcelables, and 1665 * the flags {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION} and 1666 * {@link Intent#FLAG_GRANT_PERSISTABLE_URI_PERMISSION} are cleared from the Intent. 1667 * 1668 * <p>Custom implementation may adjust the content intent to better reflect the top-level 1669 * context of the activity, and fill in its ClipData with additional content of 1670 * interest that the user is currently viewing. For example, an image gallery application 1671 * that has launched in to an activity allowing the user to swipe through pictures should 1672 * modify the intent to reference the current image they are looking it; such an 1673 * application when showing a list of pictures should add a ClipData that has 1674 * references to all of the pictures currently visible on screen.</p> 1675 * 1676 * @param outContent The assist content to return. 1677 */ 1678 public void onProvideAssistContent(AssistContent outContent) { 1679 } 1680 1681 @Override 1682 public void onProvideKeyboardShortcuts(List<KeyboardShortcutGroup> data, Menu menu) { 1683 if (menu == null) { 1684 return; 1685 } 1686 KeyboardShortcutGroup group = null; 1687 int menuSize = menu.size(); 1688 for (int i = 0; i < menuSize; ++i) { 1689 final MenuItem item = menu.getItem(i); 1690 final CharSequence title = item.getTitle(); 1691 final char alphaShortcut = item.getAlphabeticShortcut(); 1692 if (title != null && alphaShortcut != MIN_VALUE) { 1693 if (group == null) { 1694 final int resource = mApplication.getApplicationInfo().labelRes; 1695 group = new KeyboardShortcutGroup(resource != 0 ? getString(resource) : null); 1696 } 1697 group.addItem(new KeyboardShortcutInfo( 1698 title, alphaShortcut, KeyEvent.META_CTRL_ON)); 1699 } 1700 } 1701 if (group != null) { 1702 data.add(group); 1703 } 1704 } 1705 1706 /** 1707 * Ask to have the current assistant shown to the user. This only works if the calling 1708 * activity is the current foreground activity. It is the same as calling 1709 * {@link android.service.voice.VoiceInteractionService#showSession 1710 * VoiceInteractionService.showSession} and requesting all of the possible context. 1711 * The receiver will always see 1712 * {@link android.service.voice.VoiceInteractionSession#SHOW_SOURCE_APPLICATION} set. 1713 * @return Returns true if the assistant was successfully invoked, else false. For example 1714 * false will be returned if the caller is not the current top activity. 1715 */ 1716 public boolean showAssist(Bundle args) { 1717 try { 1718 return ActivityManagerNative.getDefault().showAssistFromActivity(mToken, args); 1719 } catch (RemoteException e) { 1720 } 1721 return false; 1722 } 1723 1724 /** 1725 * Called when you are no longer visible to the user. You will next 1726 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1727 * depending on later user activity. 1728 * 1729 * <p>Note that this method may never be called, in low memory situations 1730 * where the system does not have enough memory to keep your activity's 1731 * process running after its {@link #onPause} method is called. 1732 * 1733 * <p><em>Derived classes must call through to the super class's 1734 * implementation of this method. If they do not, an exception will be 1735 * thrown.</em></p> 1736 * 1737 * @see #onRestart 1738 * @see #onResume 1739 * @see #onSaveInstanceState 1740 * @see #onDestroy 1741 */ 1742 @CallSuper 1743 protected void onStop() { 1744 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStop " + this); 1745 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1746 mActivityTransitionState.onStop(); 1747 getApplication().dispatchActivityStopped(this); 1748 mTranslucentCallback = null; 1749 mCalled = true; 1750 } 1751 1752 /** 1753 * Perform any final cleanup before an activity is destroyed. This can 1754 * happen either because the activity is finishing (someone called 1755 * {@link #finish} on it, or because the system is temporarily destroying 1756 * this instance of the activity to save space. You can distinguish 1757 * between these two scenarios with the {@link #isFinishing} method. 1758 * 1759 * <p><em>Note: do not count on this method being called as a place for 1760 * saving data! For example, if an activity is editing data in a content 1761 * provider, those edits should be committed in either {@link #onPause} or 1762 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1763 * free resources like threads that are associated with an activity, so 1764 * that a destroyed activity does not leave such things around while the 1765 * rest of its application is still running. There are situations where 1766 * the system will simply kill the activity's hosting process without 1767 * calling this method (or any others) in it, so it should not be used to 1768 * do things that are intended to remain around after the process goes 1769 * away. 1770 * 1771 * <p><em>Derived classes must call through to the super class's 1772 * implementation of this method. If they do not, an exception will be 1773 * thrown.</em></p> 1774 * 1775 * @see #onPause 1776 * @see #onStop 1777 * @see #finish 1778 * @see #isFinishing 1779 */ 1780 @CallSuper 1781 protected void onDestroy() { 1782 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onDestroy " + this); 1783 mCalled = true; 1784 1785 // dismiss any dialogs we are managing. 1786 if (mManagedDialogs != null) { 1787 final int numDialogs = mManagedDialogs.size(); 1788 for (int i = 0; i < numDialogs; i++) { 1789 final ManagedDialog md = mManagedDialogs.valueAt(i); 1790 if (md.mDialog.isShowing()) { 1791 md.mDialog.dismiss(); 1792 } 1793 } 1794 mManagedDialogs = null; 1795 } 1796 1797 // close any cursors we are managing. 1798 synchronized (mManagedCursors) { 1799 int numCursors = mManagedCursors.size(); 1800 for (int i = 0; i < numCursors; i++) { 1801 ManagedCursor c = mManagedCursors.get(i); 1802 if (c != null) { 1803 c.mCursor.close(); 1804 } 1805 } 1806 mManagedCursors.clear(); 1807 } 1808 1809 // Close any open search dialog 1810 if (mSearchManager != null) { 1811 mSearchManager.stopSearch(); 1812 } 1813 1814 if (mActionBar != null) { 1815 mActionBar.onDestroy(); 1816 } 1817 1818 getApplication().dispatchActivityDestroyed(this); 1819 } 1820 1821 /** 1822 * Report to the system that your app is now fully drawn, purely for diagnostic 1823 * purposes (calling it does not impact the visible behavior of the activity). 1824 * This is only used to help instrument application launch times, so that the 1825 * app can report when it is fully in a usable state; without this, the only thing 1826 * the system itself can determine is the point at which the activity's window 1827 * is <em>first</em> drawn and displayed. To participate in app launch time 1828 * measurement, you should always call this method after first launch (when 1829 * {@link #onCreate(android.os.Bundle)} is called), at the point where you have 1830 * entirely drawn your UI and populated with all of the significant data. You 1831 * can safely call this method any time after first launch as well, in which case 1832 * it will simply be ignored. 1833 */ 1834 public void reportFullyDrawn() { 1835 if (mDoReportFullyDrawn) { 1836 mDoReportFullyDrawn = false; 1837 try { 1838 ActivityManagerNative.getDefault().reportActivityFullyDrawn(mToken); 1839 } catch (RemoteException e) { 1840 } 1841 } 1842 } 1843 1844 /** 1845 * Called by the system when the activity changes from fullscreen mode to multi-window mode and 1846 * visa-versa. 1847 * @see android.R.attr#resizeableActivity 1848 * 1849 * @param inMultiWindow True if the activity is in multi-window mode. 1850 */ 1851 @CallSuper 1852 public void onMultiWindowChanged(boolean inMultiWindow) { 1853 if (DEBUG_LIFECYCLE) Slog.v(TAG, 1854 "onMultiWindowChanged " + this + ": " + inMultiWindow); 1855 mFragments.dispatchMultiWindowChanged(inMultiWindow); 1856 if (mWindow != null) { 1857 mWindow.onMultiWindowChanged(); 1858 } 1859 } 1860 1861 /** 1862 * Returns true if the activity is currently in multi-window mode. 1863 * @see android.R.attr#resizeableActivity 1864 * 1865 * @return True if the activity is in multi-window mode. 1866 */ 1867 public boolean inMultiWindow() { 1868 try { 1869 return ActivityManagerNative.getDefault().inMultiWindow(mToken); 1870 } catch (RemoteException e) { 1871 } 1872 return false; 1873 } 1874 1875 /** 1876 * Called by the system when the activity changes to and from picture-in-picture mode. 1877 * @see android.R.attr#supportsPictureInPicture 1878 * 1879 * @param inPictureInPicture True if the activity is in picture-in-picture mode. 1880 */ 1881 @CallSuper 1882 public void onPictureInPictureChanged(boolean inPictureInPicture) { 1883 if (DEBUG_LIFECYCLE) Slog.v(TAG, 1884 "onPictureInPictureChanged " + this + ": " + inPictureInPicture); 1885 mFragments.dispatchPictureInPictureChanged(inPictureInPicture); 1886 } 1887 1888 /** 1889 * Returns true if the activity is currently in picture-in-picture mode. 1890 * @see android.R.attr#supportsPictureInPicture 1891 * 1892 * @return True if the activity is in picture-in-picture mode. 1893 */ 1894 public boolean inPictureInPicture() { 1895 try { 1896 return ActivityManagerNative.getDefault().inPictureInPicture(mToken); 1897 } catch (RemoteException e) { 1898 } 1899 return false; 1900 } 1901 1902 /** 1903 * Puts the activity in picture-in-picture mode. 1904 * @see android.R.attr#supportsPictureInPicture 1905 */ 1906 public void enterPictureInPicture() { 1907 try { 1908 ActivityManagerNative.getDefault().enterPictureInPicture(mToken); 1909 } catch (RemoteException e) { 1910 } 1911 } 1912 1913 /** 1914 * Called by the system when the device configuration changes while your 1915 * activity is running. Note that this will <em>only</em> be called if 1916 * you have selected configurations you would like to handle with the 1917 * {@link android.R.attr#configChanges} attribute in your manifest. If 1918 * any configuration change occurs that is not selected to be reported 1919 * by that attribute, then instead of reporting it the system will stop 1920 * and restart the activity (to have it launched with the new 1921 * configuration). 1922 * 1923 * <p>At the time that this function has been called, your Resources 1924 * object will have been updated to return resource values matching the 1925 * new configuration. 1926 * 1927 * @param newConfig The new device configuration. 1928 */ 1929 public void onConfigurationChanged(Configuration newConfig) { 1930 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig); 1931 mCalled = true; 1932 1933 mFragments.dispatchConfigurationChanged(newConfig); 1934 1935 if (mWindow != null) { 1936 // Pass the configuration changed event to the window 1937 mWindow.onConfigurationChanged(newConfig); 1938 } 1939 1940 if (mActionBar != null) { 1941 // Do this last; the action bar will need to access 1942 // view changes from above. 1943 mActionBar.onConfigurationChanged(newConfig); 1944 } 1945 } 1946 1947 /** 1948 * If this activity is being destroyed because it can not handle a 1949 * configuration parameter being changed (and thus its 1950 * {@link #onConfigurationChanged(Configuration)} method is 1951 * <em>not</em> being called), then you can use this method to discover 1952 * the set of changes that have occurred while in the process of being 1953 * destroyed. Note that there is no guarantee that these will be 1954 * accurate (other changes could have happened at any time), so you should 1955 * only use this as an optimization hint. 1956 * 1957 * @return Returns a bit field of the configuration parameters that are 1958 * changing, as defined by the {@link android.content.res.Configuration} 1959 * class. 1960 */ 1961 public int getChangingConfigurations() { 1962 return mConfigChangeFlags; 1963 } 1964 1965 /** 1966 * Retrieve the non-configuration instance data that was previously 1967 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1968 * be available from the initial {@link #onCreate} and 1969 * {@link #onStart} calls to the new instance, allowing you to extract 1970 * any useful dynamic state from the previous instance. 1971 * 1972 * <p>Note that the data you retrieve here should <em>only</em> be used 1973 * as an optimization for handling configuration changes. You should always 1974 * be able to handle getting a null pointer back, and an activity must 1975 * still be able to restore itself to its previous state (through the 1976 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1977 * function returns null. 1978 * 1979 * @return Returns the object previously returned by 1980 * {@link #onRetainNonConfigurationInstance()}. 1981 * 1982 * @deprecated Use the new {@link Fragment} API 1983 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1984 * available on older platforms through the Android compatibility package. 1985 */ 1986 @Nullable 1987 @Deprecated 1988 public Object getLastNonConfigurationInstance() { 1989 return mLastNonConfigurationInstances != null 1990 ? mLastNonConfigurationInstances.activity : null; 1991 } 1992 1993 /** 1994 * Called by the system, as part of destroying an 1995 * activity due to a configuration change, when it is known that a new 1996 * instance will immediately be created for the new configuration. You 1997 * can return any object you like here, including the activity instance 1998 * itself, which can later be retrieved by calling 1999 * {@link #getLastNonConfigurationInstance()} in the new activity 2000 * instance. 2001 * 2002 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2003 * or later, consider instead using a {@link Fragment} with 2004 * {@link Fragment#setRetainInstance(boolean) 2005 * Fragment.setRetainInstance(boolean}.</em> 2006 * 2007 * <p>This function is called purely as an optimization, and you must 2008 * not rely on it being called. When it is called, a number of guarantees 2009 * will be made to help optimize configuration switching: 2010 * <ul> 2011 * <li> The function will be called between {@link #onStop} and 2012 * {@link #onDestroy}. 2013 * <li> A new instance of the activity will <em>always</em> be immediately 2014 * created after this one's {@link #onDestroy()} is called. In particular, 2015 * <em>no</em> messages will be dispatched during this time (when the returned 2016 * object does not have an activity to be associated with). 2017 * <li> The object you return here will <em>always</em> be available from 2018 * the {@link #getLastNonConfigurationInstance()} method of the following 2019 * activity instance as described there. 2020 * </ul> 2021 * 2022 * <p>These guarantees are designed so that an activity can use this API 2023 * to propagate extensive state from the old to new activity instance, from 2024 * loaded bitmaps, to network connections, to evenly actively running 2025 * threads. Note that you should <em>not</em> propagate any data that 2026 * may change based on the configuration, including any data loaded from 2027 * resources such as strings, layouts, or drawables. 2028 * 2029 * <p>The guarantee of no message handling during the switch to the next 2030 * activity simplifies use with active objects. For example if your retained 2031 * state is an {@link android.os.AsyncTask} you are guaranteed that its 2032 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 2033 * not be called from the call here until you execute the next instance's 2034 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 2035 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 2036 * running in a separate thread.) 2037 * 2038 * @return Return any Object holding the desired state to propagate to the 2039 * next activity instance. 2040 * 2041 * @deprecated Use the new {@link Fragment} API 2042 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 2043 * available on older platforms through the Android compatibility package. 2044 */ 2045 public Object onRetainNonConfigurationInstance() { 2046 return null; 2047 } 2048 2049 /** 2050 * Retrieve the non-configuration instance data that was previously 2051 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 2052 * be available from the initial {@link #onCreate} and 2053 * {@link #onStart} calls to the new instance, allowing you to extract 2054 * any useful dynamic state from the previous instance. 2055 * 2056 * <p>Note that the data you retrieve here should <em>only</em> be used 2057 * as an optimization for handling configuration changes. You should always 2058 * be able to handle getting a null pointer back, and an activity must 2059 * still be able to restore itself to its previous state (through the 2060 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 2061 * function returns null. 2062 * 2063 * @return Returns the object previously returned by 2064 * {@link #onRetainNonConfigurationChildInstances()} 2065 */ 2066 @Nullable 2067 HashMap<String, Object> getLastNonConfigurationChildInstances() { 2068 return mLastNonConfigurationInstances != null 2069 ? mLastNonConfigurationInstances.children : null; 2070 } 2071 2072 /** 2073 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 2074 * it should return either a mapping from child activity id strings to arbitrary objects, 2075 * or null. This method is intended to be used by Activity framework subclasses that control a 2076 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 2077 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 2078 */ 2079 @Nullable 2080 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 2081 return null; 2082 } 2083 2084 NonConfigurationInstances retainNonConfigurationInstances() { 2085 Object activity = onRetainNonConfigurationInstance(); 2086 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 2087 FragmentManagerNonConfig fragments = mFragments.retainNestedNonConfig(); 2088 ArrayMap<String, LoaderManager> loaders = mFragments.retainLoaderNonConfig(); 2089 if (activity == null && children == null && fragments == null && loaders == null 2090 && mVoiceInteractor == null) { 2091 return null; 2092 } 2093 2094 NonConfigurationInstances nci = new NonConfigurationInstances(); 2095 nci.activity = activity; 2096 nci.children = children; 2097 nci.fragments = fragments; 2098 nci.loaders = loaders; 2099 if (mVoiceInteractor != null) { 2100 mVoiceInteractor.retainInstance(); 2101 nci.voiceInteractor = mVoiceInteractor; 2102 } 2103 return nci; 2104 } 2105 2106 public void onLowMemory() { 2107 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onLowMemory " + this); 2108 mCalled = true; 2109 mFragments.dispatchLowMemory(); 2110 } 2111 2112 public void onTrimMemory(int level) { 2113 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onTrimMemory " + this + ": " + level); 2114 mCalled = true; 2115 mFragments.dispatchTrimMemory(level); 2116 } 2117 2118 /** 2119 * Return the FragmentManager for interacting with fragments associated 2120 * with this activity. 2121 */ 2122 public FragmentManager getFragmentManager() { 2123 return mFragments.getFragmentManager(); 2124 } 2125 2126 /** 2127 * Called when a Fragment is being attached to this activity, immediately 2128 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 2129 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 2130 */ 2131 public void onAttachFragment(Fragment fragment) { 2132 } 2133 2134 /** 2135 * Wrapper around 2136 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 2137 * that gives the resulting {@link Cursor} to call 2138 * {@link #startManagingCursor} so that the activity will manage its 2139 * lifecycle for you. 2140 * 2141 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2142 * or later, consider instead using {@link LoaderManager} instead, available 2143 * via {@link #getLoaderManager()}.</em> 2144 * 2145 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 2146 * this method, because the activity will do that for you at the appropriate time. However, if 2147 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 2148 * not</em> automatically close the cursor and, in that case, you must call 2149 * {@link Cursor#close()}.</p> 2150 * 2151 * @param uri The URI of the content provider to query. 2152 * @param projection List of columns to return. 2153 * @param selection SQL WHERE clause. 2154 * @param sortOrder SQL ORDER BY clause. 2155 * 2156 * @return The Cursor that was returned by query(). 2157 * 2158 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 2159 * @see #startManagingCursor 2160 * @hide 2161 * 2162 * @deprecated Use {@link CursorLoader} instead. 2163 */ 2164 @Deprecated 2165 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 2166 String sortOrder) { 2167 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 2168 if (c != null) { 2169 startManagingCursor(c); 2170 } 2171 return c; 2172 } 2173 2174 /** 2175 * Wrapper around 2176 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 2177 * that gives the resulting {@link Cursor} to call 2178 * {@link #startManagingCursor} so that the activity will manage its 2179 * lifecycle for you. 2180 * 2181 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2182 * or later, consider instead using {@link LoaderManager} instead, available 2183 * via {@link #getLoaderManager()}.</em> 2184 * 2185 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 2186 * this method, because the activity will do that for you at the appropriate time. However, if 2187 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 2188 * not</em> automatically close the cursor and, in that case, you must call 2189 * {@link Cursor#close()}.</p> 2190 * 2191 * @param uri The URI of the content provider to query. 2192 * @param projection List of columns to return. 2193 * @param selection SQL WHERE clause. 2194 * @param selectionArgs The arguments to selection, if any ?s are pesent 2195 * @param sortOrder SQL ORDER BY clause. 2196 * 2197 * @return The Cursor that was returned by query(). 2198 * 2199 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 2200 * @see #startManagingCursor 2201 * 2202 * @deprecated Use {@link CursorLoader} instead. 2203 */ 2204 @Deprecated 2205 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 2206 String[] selectionArgs, String sortOrder) { 2207 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 2208 if (c != null) { 2209 startManagingCursor(c); 2210 } 2211 return c; 2212 } 2213 2214 /** 2215 * This method allows the activity to take care of managing the given 2216 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 2217 * That is, when the activity is stopped it will automatically call 2218 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 2219 * it will call {@link Cursor#requery} for you. When the activity is 2220 * destroyed, all managed Cursors will be closed automatically. 2221 * 2222 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2223 * or later, consider instead using {@link LoaderManager} instead, available 2224 * via {@link #getLoaderManager()}.</em> 2225 * 2226 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 2227 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 2228 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 2229 * <em>will not</em> automatically close the cursor and, in that case, you must call 2230 * {@link Cursor#close()}.</p> 2231 * 2232 * @param c The Cursor to be managed. 2233 * 2234 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 2235 * @see #stopManagingCursor 2236 * 2237 * @deprecated Use the new {@link android.content.CursorLoader} class with 2238 * {@link LoaderManager} instead; this is also 2239 * available on older platforms through the Android compatibility package. 2240 */ 2241 @Deprecated 2242 public void startManagingCursor(Cursor c) { 2243 synchronized (mManagedCursors) { 2244 mManagedCursors.add(new ManagedCursor(c)); 2245 } 2246 } 2247 2248 /** 2249 * Given a Cursor that was previously given to 2250 * {@link #startManagingCursor}, stop the activity's management of that 2251 * cursor. 2252 * 2253 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 2254 * the system <em>will not</em> automatically close the cursor and you must call 2255 * {@link Cursor#close()}.</p> 2256 * 2257 * @param c The Cursor that was being managed. 2258 * 2259 * @see #startManagingCursor 2260 * 2261 * @deprecated Use the new {@link android.content.CursorLoader} class with 2262 * {@link LoaderManager} instead; this is also 2263 * available on older platforms through the Android compatibility package. 2264 */ 2265 @Deprecated 2266 public void stopManagingCursor(Cursor c) { 2267 synchronized (mManagedCursors) { 2268 final int N = mManagedCursors.size(); 2269 for (int i=0; i<N; i++) { 2270 ManagedCursor mc = mManagedCursors.get(i); 2271 if (mc.mCursor == c) { 2272 mManagedCursors.remove(i); 2273 break; 2274 } 2275 } 2276 } 2277 } 2278 2279 /** 2280 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 2281 * this is a no-op. 2282 * @hide 2283 */ 2284 @Deprecated 2285 public void setPersistent(boolean isPersistent) { 2286 } 2287 2288 /** 2289 * Finds a view that was identified by the id attribute from the XML that 2290 * was processed in {@link #onCreate}. 2291 * 2292 * @return The view if found or null otherwise. 2293 */ 2294 @Nullable 2295 public View findViewById(@IdRes int id) { 2296 return getWindow().findViewById(id); 2297 } 2298 2299 /** 2300 * Retrieve a reference to this activity's ActionBar. 2301 * 2302 * @return The Activity's ActionBar, or null if it does not have one. 2303 */ 2304 @Nullable 2305 public ActionBar getActionBar() { 2306 initWindowDecorActionBar(); 2307 return mActionBar; 2308 } 2309 2310 /** 2311 * Set a {@link android.widget.Toolbar Toolbar} to act as the {@link ActionBar} for this 2312 * Activity window. 2313 * 2314 * <p>When set to a non-null value the {@link #getActionBar()} method will return 2315 * an {@link ActionBar} object that can be used to control the given toolbar as if it were 2316 * a traditional window decor action bar. The toolbar's menu will be populated with the 2317 * Activity's options menu and the navigation button will be wired through the standard 2318 * {@link android.R.id#home home} menu select action.</p> 2319 * 2320 * <p>In order to use a Toolbar within the Activity's window content the application 2321 * must not request the window feature {@link Window#FEATURE_ACTION_BAR FEATURE_ACTION_BAR}.</p> 2322 * 2323 * @param toolbar Toolbar to set as the Activity's action bar, or {@code null} to clear it 2324 */ 2325 public void setActionBar(@Nullable Toolbar toolbar) { 2326 final ActionBar ab = getActionBar(); 2327 if (ab instanceof WindowDecorActionBar) { 2328 throw new IllegalStateException("This Activity already has an action bar supplied " + 2329 "by the window decor. Do not request Window.FEATURE_ACTION_BAR and set " + 2330 "android:windowActionBar to false in your theme to use a Toolbar instead."); 2331 } 2332 2333 // If we reach here then we're setting a new action bar 2334 // First clear out the MenuInflater to make sure that it is valid for the new Action Bar 2335 mMenuInflater = null; 2336 2337 // If we have an action bar currently, destroy it 2338 if (ab != null) { 2339 ab.onDestroy(); 2340 } 2341 2342 if (toolbar != null) { 2343 final ToolbarActionBar tbab = new ToolbarActionBar(toolbar, getTitle(), this); 2344 mActionBar = tbab; 2345 mWindow.setCallback(tbab.getWrappedWindowCallback()); 2346 } else { 2347 mActionBar = null; 2348 // Re-set the original window callback since we may have already set a Toolbar wrapper 2349 mWindow.setCallback(this); 2350 } 2351 2352 invalidateOptionsMenu(); 2353 } 2354 2355 /** 2356 * Creates a new ActionBar, locates the inflated ActionBarView, 2357 * initializes the ActionBar with the view, and sets mActionBar. 2358 */ 2359 private void initWindowDecorActionBar() { 2360 Window window = getWindow(); 2361 2362 // Initializing the window decor can change window feature flags. 2363 // Make sure that we have the correct set before performing the test below. 2364 window.getDecorView(); 2365 2366 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 2367 return; 2368 } 2369 2370 mActionBar = new WindowDecorActionBar(this); 2371 mActionBar.setDefaultDisplayHomeAsUpEnabled(mEnableDefaultActionBarUp); 2372 2373 mWindow.setDefaultIcon(mActivityInfo.getIconResource()); 2374 mWindow.setDefaultLogo(mActivityInfo.getLogoResource()); 2375 } 2376 2377 /** 2378 * Set the activity content from a layout resource. The resource will be 2379 * inflated, adding all top-level views to the activity. 2380 * 2381 * @param layoutResID Resource ID to be inflated. 2382 * 2383 * @see #setContentView(android.view.View) 2384 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2385 */ 2386 public void setContentView(@LayoutRes int layoutResID) { 2387 getWindow().setContentView(layoutResID); 2388 initWindowDecorActionBar(); 2389 } 2390 2391 /** 2392 * Set the activity content to an explicit view. This view is placed 2393 * directly into the activity's view hierarchy. It can itself be a complex 2394 * view hierarchy. When calling this method, the layout parameters of the 2395 * specified view are ignored. Both the width and the height of the view are 2396 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 2397 * your own layout parameters, invoke 2398 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 2399 * instead. 2400 * 2401 * @param view The desired content to display. 2402 * 2403 * @see #setContentView(int) 2404 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2405 */ 2406 public void setContentView(View view) { 2407 getWindow().setContentView(view); 2408 initWindowDecorActionBar(); 2409 } 2410 2411 /** 2412 * Set the activity content to an explicit view. This view is placed 2413 * directly into the activity's view hierarchy. It can itself be a complex 2414 * view hierarchy. 2415 * 2416 * @param view The desired content to display. 2417 * @param params Layout parameters for the view. 2418 * 2419 * @see #setContentView(android.view.View) 2420 * @see #setContentView(int) 2421 */ 2422 public void setContentView(View view, ViewGroup.LayoutParams params) { 2423 getWindow().setContentView(view, params); 2424 initWindowDecorActionBar(); 2425 } 2426 2427 /** 2428 * Add an additional content view to the activity. Added after any existing 2429 * ones in the activity -- existing views are NOT removed. 2430 * 2431 * @param view The desired content to display. 2432 * @param params Layout parameters for the view. 2433 */ 2434 public void addContentView(View view, ViewGroup.LayoutParams params) { 2435 getWindow().addContentView(view, params); 2436 initWindowDecorActionBar(); 2437 } 2438 2439 /** 2440 * Retrieve the {@link TransitionManager} responsible for default transitions in this window. 2441 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2442 * 2443 * <p>This method will return non-null after content has been initialized (e.g. by using 2444 * {@link #setContentView}) if {@link Window#FEATURE_CONTENT_TRANSITIONS} has been granted.</p> 2445 * 2446 * @return This window's content TransitionManager or null if none is set. 2447 */ 2448 public TransitionManager getContentTransitionManager() { 2449 return getWindow().getTransitionManager(); 2450 } 2451 2452 /** 2453 * Set the {@link TransitionManager} to use for default transitions in this window. 2454 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2455 * 2456 * @param tm The TransitionManager to use for scene changes. 2457 */ 2458 public void setContentTransitionManager(TransitionManager tm) { 2459 getWindow().setTransitionManager(tm); 2460 } 2461 2462 /** 2463 * Retrieve the {@link Scene} representing this window's current content. 2464 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2465 * 2466 * <p>This method will return null if the current content is not represented by a Scene.</p> 2467 * 2468 * @return Current Scene being shown or null 2469 */ 2470 public Scene getContentScene() { 2471 return getWindow().getContentScene(); 2472 } 2473 2474 /** 2475 * Sets whether this activity is finished when touched outside its window's 2476 * bounds. 2477 */ 2478 public void setFinishOnTouchOutside(boolean finish) { 2479 mWindow.setCloseOnTouchOutside(finish); 2480 } 2481 2482 /** @hide */ 2483 @IntDef({ 2484 DEFAULT_KEYS_DISABLE, 2485 DEFAULT_KEYS_DIALER, 2486 DEFAULT_KEYS_SHORTCUT, 2487 DEFAULT_KEYS_SEARCH_LOCAL, 2488 DEFAULT_KEYS_SEARCH_GLOBAL}) 2489 @Retention(RetentionPolicy.SOURCE) 2490 @interface DefaultKeyMode {} 2491 2492 /** 2493 * Use with {@link #setDefaultKeyMode} to turn off default handling of 2494 * keys. 2495 * 2496 * @see #setDefaultKeyMode 2497 */ 2498 static public final int DEFAULT_KEYS_DISABLE = 0; 2499 /** 2500 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 2501 * key handling. 2502 * 2503 * @see #setDefaultKeyMode 2504 */ 2505 static public final int DEFAULT_KEYS_DIALER = 1; 2506 /** 2507 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 2508 * default key handling. 2509 * 2510 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 2511 * 2512 * @see #setDefaultKeyMode 2513 */ 2514 static public final int DEFAULT_KEYS_SHORTCUT = 2; 2515 /** 2516 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2517 * will start an application-defined search. (If the application or activity does not 2518 * actually define a search, the the keys will be ignored.) 2519 * 2520 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2521 * 2522 * @see #setDefaultKeyMode 2523 */ 2524 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 2525 2526 /** 2527 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2528 * will start a global search (typically web search, but some platforms may define alternate 2529 * methods for global search) 2530 * 2531 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2532 * 2533 * @see #setDefaultKeyMode 2534 */ 2535 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 2536 2537 /** 2538 * Select the default key handling for this activity. This controls what 2539 * will happen to key events that are not otherwise handled. The default 2540 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 2541 * floor. Other modes allow you to launch the dialer 2542 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 2543 * menu without requiring the menu key be held down 2544 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 2545 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 2546 * 2547 * <p>Note that the mode selected here does not impact the default 2548 * handling of system keys, such as the "back" and "menu" keys, and your 2549 * activity and its views always get a first chance to receive and handle 2550 * all application keys. 2551 * 2552 * @param mode The desired default key mode constant. 2553 * 2554 * @see #DEFAULT_KEYS_DISABLE 2555 * @see #DEFAULT_KEYS_DIALER 2556 * @see #DEFAULT_KEYS_SHORTCUT 2557 * @see #DEFAULT_KEYS_SEARCH_LOCAL 2558 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 2559 * @see #onKeyDown 2560 */ 2561 public final void setDefaultKeyMode(@DefaultKeyMode int mode) { 2562 mDefaultKeyMode = mode; 2563 2564 // Some modes use a SpannableStringBuilder to track & dispatch input events 2565 // This list must remain in sync with the switch in onKeyDown() 2566 switch (mode) { 2567 case DEFAULT_KEYS_DISABLE: 2568 case DEFAULT_KEYS_SHORTCUT: 2569 mDefaultKeySsb = null; // not used in these modes 2570 break; 2571 case DEFAULT_KEYS_DIALER: 2572 case DEFAULT_KEYS_SEARCH_LOCAL: 2573 case DEFAULT_KEYS_SEARCH_GLOBAL: 2574 mDefaultKeySsb = new SpannableStringBuilder(); 2575 Selection.setSelection(mDefaultKeySsb,0); 2576 break; 2577 default: 2578 throw new IllegalArgumentException(); 2579 } 2580 } 2581 2582 /** 2583 * Called when a key was pressed down and not handled by any of the views 2584 * inside of the activity. So, for example, key presses while the cursor 2585 * is inside a TextView will not trigger the event (unless it is a navigation 2586 * to another object) because TextView handles its own key presses. 2587 * 2588 * <p>If the focused view didn't want this event, this method is called. 2589 * 2590 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2591 * by calling {@link #onBackPressed()}, though the behavior varies based 2592 * on the application compatibility mode: for 2593 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2594 * it will set up the dispatch to call {@link #onKeyUp} where the action 2595 * will be performed; for earlier applications, it will perform the 2596 * action immediately in on-down, as those versions of the platform 2597 * behaved. 2598 * 2599 * <p>Other additional default key handling may be performed 2600 * if configured with {@link #setDefaultKeyMode}. 2601 * 2602 * @return Return <code>true</code> to prevent this event from being propagated 2603 * further, or <code>false</code> to indicate that you have not handled 2604 * this event and it should continue to be propagated. 2605 * @see #onKeyUp 2606 * @see android.view.KeyEvent 2607 */ 2608 public boolean onKeyDown(int keyCode, KeyEvent event) { 2609 if (keyCode == KeyEvent.KEYCODE_BACK) { 2610 if (getApplicationInfo().targetSdkVersion 2611 >= Build.VERSION_CODES.ECLAIR) { 2612 event.startTracking(); 2613 } else { 2614 onBackPressed(); 2615 } 2616 return true; 2617 } 2618 2619 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2620 return false; 2621 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2622 Window w = getWindow(); 2623 if (w.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 2624 w.performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, keyCode, event, 2625 Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2626 return true; 2627 } 2628 return false; 2629 } else { 2630 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2631 boolean clearSpannable = false; 2632 boolean handled; 2633 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2634 clearSpannable = true; 2635 handled = false; 2636 } else { 2637 handled = TextKeyListener.getInstance().onKeyDown( 2638 null, mDefaultKeySsb, keyCode, event); 2639 if (handled && mDefaultKeySsb.length() > 0) { 2640 // something useable has been typed - dispatch it now. 2641 2642 final String str = mDefaultKeySsb.toString(); 2643 clearSpannable = true; 2644 2645 switch (mDefaultKeyMode) { 2646 case DEFAULT_KEYS_DIALER: 2647 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2648 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2649 startActivity(intent); 2650 break; 2651 case DEFAULT_KEYS_SEARCH_LOCAL: 2652 startSearch(str, false, null, false); 2653 break; 2654 case DEFAULT_KEYS_SEARCH_GLOBAL: 2655 startSearch(str, false, null, true); 2656 break; 2657 } 2658 } 2659 } 2660 if (clearSpannable) { 2661 mDefaultKeySsb.clear(); 2662 mDefaultKeySsb.clearSpans(); 2663 Selection.setSelection(mDefaultKeySsb,0); 2664 } 2665 return handled; 2666 } 2667 } 2668 2669 /** 2670 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2671 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2672 * the event). 2673 */ 2674 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2675 return false; 2676 } 2677 2678 /** 2679 * Called when a key was released and not handled by any of the views 2680 * inside of the activity. So, for example, key presses while the cursor 2681 * is inside a TextView will not trigger the event (unless it is a navigation 2682 * to another object) because TextView handles its own key presses. 2683 * 2684 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2685 * and go back. 2686 * 2687 * @return Return <code>true</code> to prevent this event from being propagated 2688 * further, or <code>false</code> to indicate that you have not handled 2689 * this event and it should continue to be propagated. 2690 * @see #onKeyDown 2691 * @see KeyEvent 2692 */ 2693 public boolean onKeyUp(int keyCode, KeyEvent event) { 2694 if (getApplicationInfo().targetSdkVersion 2695 >= Build.VERSION_CODES.ECLAIR) { 2696 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2697 && !event.isCanceled()) { 2698 onBackPressed(); 2699 return true; 2700 } 2701 } 2702 return false; 2703 } 2704 2705 /** 2706 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2707 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2708 * the event). 2709 */ 2710 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2711 return false; 2712 } 2713 2714 /** 2715 * Called when the activity has detected the user's press of the back 2716 * key. The default implementation simply finishes the current activity, 2717 * but you can override this to do whatever you want. 2718 */ 2719 public void onBackPressed() { 2720 if (mActionBar != null && mActionBar.collapseActionView()) { 2721 return; 2722 } 2723 2724 if (!mFragments.getFragmentManager().popBackStackImmediate()) { 2725 finishAfterTransition(); 2726 } 2727 } 2728 2729 /** 2730 * Called when a key shortcut event is not handled by any of the views in the Activity. 2731 * Override this method to implement global key shortcuts for the Activity. 2732 * Key shortcuts can also be implemented by setting the 2733 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2734 * 2735 * @param keyCode The value in event.getKeyCode(). 2736 * @param event Description of the key event. 2737 * @return True if the key shortcut was handled. 2738 */ 2739 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2740 // Let the Action Bar have a chance at handling the shortcut. 2741 ActionBar actionBar = getActionBar(); 2742 return (actionBar != null && actionBar.onKeyShortcut(keyCode, event)); 2743 } 2744 2745 /** 2746 * Called when a touch screen event was not handled by any of the views 2747 * under it. This is most useful to process touch events that happen 2748 * outside of your window bounds, where there is no view to receive it. 2749 * 2750 * @param event The touch screen event being processed. 2751 * 2752 * @return Return true if you have consumed the event, false if you haven't. 2753 * The default implementation always returns false. 2754 */ 2755 public boolean onTouchEvent(MotionEvent event) { 2756 if (mWindow.shouldCloseOnTouch(this, event)) { 2757 finish(); 2758 return true; 2759 } 2760 2761 return false; 2762 } 2763 2764 /** 2765 * Called when the trackball was moved and not handled by any of the 2766 * views inside of the activity. So, for example, if the trackball moves 2767 * while focus is on a button, you will receive a call here because 2768 * buttons do not normally do anything with trackball events. The call 2769 * here happens <em>before</em> trackball movements are converted to 2770 * DPAD key events, which then get sent back to the view hierarchy, and 2771 * will be processed at the point for things like focus navigation. 2772 * 2773 * @param event The trackball event being processed. 2774 * 2775 * @return Return true if you have consumed the event, false if you haven't. 2776 * The default implementation always returns false. 2777 */ 2778 public boolean onTrackballEvent(MotionEvent event) { 2779 return false; 2780 } 2781 2782 /** 2783 * Called when a generic motion event was not handled by any of the 2784 * views inside of the activity. 2785 * <p> 2786 * Generic motion events describe joystick movements, mouse hovers, track pad 2787 * touches, scroll wheel movements and other input events. The 2788 * {@link MotionEvent#getSource() source} of the motion event specifies 2789 * the class of input that was received. Implementations of this method 2790 * must examine the bits in the source before processing the event. 2791 * The following code example shows how this is done. 2792 * </p><p> 2793 * Generic motion events with source class 2794 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2795 * are delivered to the view under the pointer. All other generic motion events are 2796 * delivered to the focused view. 2797 * </p><p> 2798 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2799 * handle this event. 2800 * </p> 2801 * 2802 * @param event The generic motion event being processed. 2803 * 2804 * @return Return true if you have consumed the event, false if you haven't. 2805 * The default implementation always returns false. 2806 */ 2807 public boolean onGenericMotionEvent(MotionEvent event) { 2808 return false; 2809 } 2810 2811 /** 2812 * Called whenever a key, touch, or trackball event is dispatched to the 2813 * activity. Implement this method if you wish to know that the user has 2814 * interacted with the device in some way while your activity is running. 2815 * This callback and {@link #onUserLeaveHint} are intended to help 2816 * activities manage status bar notifications intelligently; specifically, 2817 * for helping activities determine the proper time to cancel a notfication. 2818 * 2819 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2820 * be accompanied by calls to {@link #onUserInteraction}. This 2821 * ensures that your activity will be told of relevant user activity such 2822 * as pulling down the notification pane and touching an item there. 2823 * 2824 * <p>Note that this callback will be invoked for the touch down action 2825 * that begins a touch gesture, but may not be invoked for the touch-moved 2826 * and touch-up actions that follow. 2827 * 2828 * @see #onUserLeaveHint() 2829 */ 2830 public void onUserInteraction() { 2831 } 2832 2833 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2834 // Update window manager if: we have a view, that view is 2835 // attached to its parent (which will be a RootView), and 2836 // this activity is not embedded. 2837 if (mParent == null) { 2838 View decor = mDecor; 2839 if (decor != null && decor.getParent() != null) { 2840 getWindowManager().updateViewLayout(decor, params); 2841 } 2842 } 2843 } 2844 2845 public void onContentChanged() { 2846 } 2847 2848 /** 2849 * Called when the current {@link Window} of the activity gains or loses 2850 * focus. This is the best indicator of whether this activity is visible 2851 * to the user. The default implementation clears the key tracking 2852 * state, so should always be called. 2853 * 2854 * <p>Note that this provides information about global focus state, which 2855 * is managed independently of activity lifecycles. As such, while focus 2856 * changes will generally have some relation to lifecycle changes (an 2857 * activity that is stopped will not generally get window focus), you 2858 * should not rely on any particular order between the callbacks here and 2859 * those in the other lifecycle methods such as {@link #onResume}. 2860 * 2861 * <p>As a general rule, however, a resumed activity will have window 2862 * focus... unless it has displayed other dialogs or popups that take 2863 * input focus, in which case the activity itself will not have focus 2864 * when the other windows have it. Likewise, the system may display 2865 * system-level windows (such as the status bar notification panel or 2866 * a system alert) which will temporarily take window input focus without 2867 * pausing the foreground activity. 2868 * 2869 * @param hasFocus Whether the window of this activity has focus. 2870 * 2871 * @see #hasWindowFocus() 2872 * @see #onResume 2873 * @see View#onWindowFocusChanged(boolean) 2874 */ 2875 public void onWindowFocusChanged(boolean hasFocus) { 2876 } 2877 2878 /** 2879 * Called when the main window associated with the activity has been 2880 * attached to the window manager. 2881 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2882 * for more information. 2883 * @see View#onAttachedToWindow 2884 */ 2885 public void onAttachedToWindow() { 2886 } 2887 2888 /** 2889 * Called when the main window associated with the activity has been 2890 * detached from the window manager. 2891 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2892 * for more information. 2893 * @see View#onDetachedFromWindow 2894 */ 2895 public void onDetachedFromWindow() { 2896 } 2897 2898 /** 2899 * Returns true if this activity's <em>main</em> window currently has window focus. 2900 * Note that this is not the same as the view itself having focus. 2901 * 2902 * @return True if this activity's main window currently has window focus. 2903 * 2904 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2905 */ 2906 public boolean hasWindowFocus() { 2907 Window w = getWindow(); 2908 if (w != null) { 2909 View d = w.getDecorView(); 2910 if (d != null) { 2911 return d.hasWindowFocus(); 2912 } 2913 } 2914 return false; 2915 } 2916 2917 /** 2918 * Called when the main window associated with the activity has been dismissed. 2919 * @hide 2920 */ 2921 @Override 2922 public void onWindowDismissed(boolean finishTask) { 2923 finish(finishTask ? FINISH_TASK_WITH_ACTIVITY : DONT_FINISH_TASK_WITH_ACTIVITY); 2924 } 2925 2926 2927 /** 2928 * Moves the activity from 2929 * {@link android.app.ActivityManager.StackId#FREEFORM_WORKSPACE_STACK_ID} to 2930 * {@link android.app.ActivityManager.StackId#FULLSCREEN_WORKSPACE_STACK_ID} stack. 2931 * 2932 * @hide 2933 */ 2934 @Override 2935 public void exitFreeformMode() throws RemoteException { 2936 ActivityManagerNative.getDefault().exitFreeformMode(mToken); 2937 } 2938 2939 /** Returns the current stack Id for the window. 2940 * @hide 2941 */ 2942 @Override 2943 public int getWindowStackId() throws RemoteException { 2944 return ActivityManagerNative.getDefault().getActivityStackId(mToken); 2945 } 2946 2947 /** 2948 * Called to process key events. You can override this to intercept all 2949 * key events before they are dispatched to the window. Be sure to call 2950 * this implementation for key events that should be handled normally. 2951 * 2952 * @param event The key event. 2953 * 2954 * @return boolean Return true if this event was consumed. 2955 */ 2956 public boolean dispatchKeyEvent(KeyEvent event) { 2957 onUserInteraction(); 2958 2959 // Let action bars open menus in response to the menu key prioritized over 2960 // the window handling it 2961 final int keyCode = event.getKeyCode(); 2962 if (keyCode == KeyEvent.KEYCODE_MENU && 2963 mActionBar != null && mActionBar.onMenuKeyEvent(event)) { 2964 return true; 2965 } else if (event.isCtrlPressed() && 2966 event.getUnicodeChar(event.getMetaState() & ~KeyEvent.META_CTRL_MASK) == '<') { 2967 // Capture the Control-< and send focus to the ActionBar 2968 final int action = event.getAction(); 2969 if (action == KeyEvent.ACTION_DOWN) { 2970 final ActionBar actionBar = getActionBar(); 2971 if (actionBar != null && actionBar.isShowing() && actionBar.requestFocus()) { 2972 mEatKeyUpEvent = true; 2973 return true; 2974 } 2975 } else if (action == KeyEvent.ACTION_UP && mEatKeyUpEvent) { 2976 mEatKeyUpEvent = false; 2977 return true; 2978 } 2979 } 2980 2981 Window win = getWindow(); 2982 if (win.superDispatchKeyEvent(event)) { 2983 return true; 2984 } 2985 View decor = mDecor; 2986 if (decor == null) decor = win.getDecorView(); 2987 return event.dispatch(this, decor != null 2988 ? decor.getKeyDispatcherState() : null, this); 2989 } 2990 2991 /** 2992 * Called to process a key shortcut event. 2993 * You can override this to intercept all key shortcut events before they are 2994 * dispatched to the window. Be sure to call this implementation for key shortcut 2995 * events that should be handled normally. 2996 * 2997 * @param event The key shortcut event. 2998 * @return True if this event was consumed. 2999 */ 3000 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 3001 onUserInteraction(); 3002 if (getWindow().superDispatchKeyShortcutEvent(event)) { 3003 return true; 3004 } 3005 return onKeyShortcut(event.getKeyCode(), event); 3006 } 3007 3008 /** 3009 * Called to process touch screen events. You can override this to 3010 * intercept all touch screen events before they are dispatched to the 3011 * window. Be sure to call this implementation for touch screen events 3012 * that should be handled normally. 3013 * 3014 * @param ev The touch screen event. 3015 * 3016 * @return boolean Return true if this event was consumed. 3017 */ 3018 public boolean dispatchTouchEvent(MotionEvent ev) { 3019 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 3020 onUserInteraction(); 3021 } 3022 if (getWindow().superDispatchTouchEvent(ev)) { 3023 return true; 3024 } 3025 return onTouchEvent(ev); 3026 } 3027 3028 /** 3029 * Called to process trackball events. You can override this to 3030 * intercept all trackball events before they are dispatched to the 3031 * window. Be sure to call this implementation for trackball events 3032 * that should be handled normally. 3033 * 3034 * @param ev The trackball event. 3035 * 3036 * @return boolean Return true if this event was consumed. 3037 */ 3038 public boolean dispatchTrackballEvent(MotionEvent ev) { 3039 onUserInteraction(); 3040 if (getWindow().superDispatchTrackballEvent(ev)) { 3041 return true; 3042 } 3043 return onTrackballEvent(ev); 3044 } 3045 3046 /** 3047 * Called to process generic motion events. You can override this to 3048 * intercept all generic motion events before they are dispatched to the 3049 * window. Be sure to call this implementation for generic motion events 3050 * that should be handled normally. 3051 * 3052 * @param ev The generic motion event. 3053 * 3054 * @return boolean Return true if this event was consumed. 3055 */ 3056 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 3057 onUserInteraction(); 3058 if (getWindow().superDispatchGenericMotionEvent(ev)) { 3059 return true; 3060 } 3061 return onGenericMotionEvent(ev); 3062 } 3063 3064 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 3065 event.setClassName(getClass().getName()); 3066 event.setPackageName(getPackageName()); 3067 3068 LayoutParams params = getWindow().getAttributes(); 3069 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 3070 (params.height == LayoutParams.MATCH_PARENT); 3071 event.setFullScreen(isFullScreen); 3072 3073 CharSequence title = getTitle(); 3074 if (!TextUtils.isEmpty(title)) { 3075 event.getText().add(title); 3076 } 3077 3078 return true; 3079 } 3080 3081 /** 3082 * Default implementation of 3083 * {@link android.view.Window.Callback#onCreatePanelView} 3084 * for activities. This 3085 * simply returns null so that all panel sub-windows will have the default 3086 * menu behavior. 3087 */ 3088 @Nullable 3089 public View onCreatePanelView(int featureId) { 3090 return null; 3091 } 3092 3093 /** 3094 * Default implementation of 3095 * {@link android.view.Window.Callback#onCreatePanelMenu} 3096 * for activities. This calls through to the new 3097 * {@link #onCreateOptionsMenu} method for the 3098 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 3099 * so that subclasses of Activity don't need to deal with feature codes. 3100 */ 3101 public boolean onCreatePanelMenu(int featureId, Menu menu) { 3102 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 3103 boolean show = onCreateOptionsMenu(menu); 3104 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 3105 return show; 3106 } 3107 return false; 3108 } 3109 3110 /** 3111 * Default implementation of 3112 * {@link android.view.Window.Callback#onPreparePanel} 3113 * for activities. This 3114 * calls through to the new {@link #onPrepareOptionsMenu} method for the 3115 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 3116 * panel, so that subclasses of 3117 * Activity don't need to deal with feature codes. 3118 */ 3119 public boolean onPreparePanel(int featureId, View view, Menu menu) { 3120 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 3121 boolean goforit = onPrepareOptionsMenu(menu); 3122 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 3123 return goforit; 3124 } 3125 return true; 3126 } 3127 3128 /** 3129 * {@inheritDoc} 3130 * 3131 * @return The default implementation returns true. 3132 */ 3133 public boolean onMenuOpened(int featureId, Menu menu) { 3134 if (featureId == Window.FEATURE_ACTION_BAR) { 3135 initWindowDecorActionBar(); 3136 if (mActionBar != null) { 3137 mActionBar.dispatchMenuVisibilityChanged(true); 3138 } else { 3139 Log.e(TAG, "Tried to open action bar menu with no action bar"); 3140 } 3141 } 3142 return true; 3143 } 3144 3145 /** 3146 * Default implementation of 3147 * {@link android.view.Window.Callback#onMenuItemSelected} 3148 * for activities. This calls through to the new 3149 * {@link #onOptionsItemSelected} method for the 3150 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 3151 * panel, so that subclasses of 3152 * Activity don't need to deal with feature codes. 3153 */ 3154 public boolean onMenuItemSelected(int featureId, MenuItem item) { 3155 CharSequence titleCondensed = item.getTitleCondensed(); 3156 3157 switch (featureId) { 3158 case Window.FEATURE_OPTIONS_PANEL: 3159 // Put event logging here so it gets called even if subclass 3160 // doesn't call through to superclass's implmeentation of each 3161 // of these methods below 3162 if(titleCondensed != null) { 3163 EventLog.writeEvent(50000, 0, titleCondensed.toString()); 3164 } 3165 if (onOptionsItemSelected(item)) { 3166 return true; 3167 } 3168 if (mFragments.dispatchOptionsItemSelected(item)) { 3169 return true; 3170 } 3171 if (item.getItemId() == android.R.id.home && mActionBar != null && 3172 (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) { 3173 if (mParent == null) { 3174 return onNavigateUp(); 3175 } else { 3176 return mParent.onNavigateUpFromChild(this); 3177 } 3178 } 3179 return false; 3180 3181 case Window.FEATURE_CONTEXT_MENU: 3182 if(titleCondensed != null) { 3183 EventLog.writeEvent(50000, 1, titleCondensed.toString()); 3184 } 3185 if (onContextItemSelected(item)) { 3186 return true; 3187 } 3188 return mFragments.dispatchContextItemSelected(item); 3189 3190 default: 3191 return false; 3192 } 3193 } 3194 3195 /** 3196 * Default implementation of 3197 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 3198 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 3199 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 3200 * so that subclasses of Activity don't need to deal with feature codes. 3201 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 3202 * {@link #onContextMenuClosed(Menu)} will be called. 3203 */ 3204 public void onPanelClosed(int featureId, Menu menu) { 3205 switch (featureId) { 3206 case Window.FEATURE_OPTIONS_PANEL: 3207 mFragments.dispatchOptionsMenuClosed(menu); 3208 onOptionsMenuClosed(menu); 3209 break; 3210 3211 case Window.FEATURE_CONTEXT_MENU: 3212 onContextMenuClosed(menu); 3213 break; 3214 3215 case Window.FEATURE_ACTION_BAR: 3216 initWindowDecorActionBar(); 3217 mActionBar.dispatchMenuVisibilityChanged(false); 3218 break; 3219 } 3220 } 3221 3222 /** 3223 * Declare that the options menu has changed, so should be recreated. 3224 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 3225 * time it needs to be displayed. 3226 */ 3227 public void invalidateOptionsMenu() { 3228 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3229 (mActionBar == null || !mActionBar.invalidateOptionsMenu())) { 3230 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 3231 } 3232 } 3233 3234 /** 3235 * Initialize the contents of the Activity's standard options menu. You 3236 * should place your menu items in to <var>menu</var>. 3237 * 3238 * <p>This is only called once, the first time the options menu is 3239 * displayed. To update the menu every time it is displayed, see 3240 * {@link #onPrepareOptionsMenu}. 3241 * 3242 * <p>The default implementation populates the menu with standard system 3243 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 3244 * they will be correctly ordered with application-defined menu items. 3245 * Deriving classes should always call through to the base implementation. 3246 * 3247 * <p>You can safely hold on to <var>menu</var> (and any items created 3248 * from it), making modifications to it as desired, until the next 3249 * time onCreateOptionsMenu() is called. 3250 * 3251 * <p>When you add items to the menu, you can implement the Activity's 3252 * {@link #onOptionsItemSelected} method to handle them there. 3253 * 3254 * @param menu The options menu in which you place your items. 3255 * 3256 * @return You must return true for the menu to be displayed; 3257 * if you return false it will not be shown. 3258 * 3259 * @see #onPrepareOptionsMenu 3260 * @see #onOptionsItemSelected 3261 */ 3262 public boolean onCreateOptionsMenu(Menu menu) { 3263 if (mParent != null) { 3264 return mParent.onCreateOptionsMenu(menu); 3265 } 3266 return true; 3267 } 3268 3269 /** 3270 * Prepare the Screen's standard options menu to be displayed. This is 3271 * called right before the menu is shown, every time it is shown. You can 3272 * use this method to efficiently enable/disable items or otherwise 3273 * dynamically modify the contents. 3274 * 3275 * <p>The default implementation updates the system menu items based on the 3276 * activity's state. Deriving classes should always call through to the 3277 * base class implementation. 3278 * 3279 * @param menu The options menu as last shown or first initialized by 3280 * onCreateOptionsMenu(). 3281 * 3282 * @return You must return true for the menu to be displayed; 3283 * if you return false it will not be shown. 3284 * 3285 * @see #onCreateOptionsMenu 3286 */ 3287 public boolean onPrepareOptionsMenu(Menu menu) { 3288 if (mParent != null) { 3289 return mParent.onPrepareOptionsMenu(menu); 3290 } 3291 return true; 3292 } 3293 3294 /** 3295 * This hook is called whenever an item in your options menu is selected. 3296 * The default implementation simply returns false to have the normal 3297 * processing happen (calling the item's Runnable or sending a message to 3298 * its Handler as appropriate). You can use this method for any items 3299 * for which you would like to do processing without those other 3300 * facilities. 3301 * 3302 * <p>Derived classes should call through to the base class for it to 3303 * perform the default menu handling.</p> 3304 * 3305 * @param item The menu item that was selected. 3306 * 3307 * @return boolean Return false to allow normal menu processing to 3308 * proceed, true to consume it here. 3309 * 3310 * @see #onCreateOptionsMenu 3311 */ 3312 public boolean onOptionsItemSelected(MenuItem item) { 3313 if (mParent != null) { 3314 return mParent.onOptionsItemSelected(item); 3315 } 3316 return false; 3317 } 3318 3319 /** 3320 * This method is called whenever the user chooses to navigate Up within your application's 3321 * activity hierarchy from the action bar. 3322 * 3323 * <p>If the attribute {@link android.R.attr#parentActivityName parentActivityName} 3324 * was specified in the manifest for this activity or an activity-alias to it, 3325 * default Up navigation will be handled automatically. If any activity 3326 * along the parent chain requires extra Intent arguments, the Activity subclass 3327 * should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)} 3328 * to supply those arguments.</p> 3329 * 3330 * <p>See <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 3331 * from the developer guide and <a href="{@docRoot}design/patterns/navigation.html">Navigation</a> 3332 * from the design guide for more information about navigating within your app.</p> 3333 * 3334 * <p>See the {@link TaskStackBuilder} class and the Activity methods 3335 * {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and 3336 * {@link #navigateUpTo(Intent)} for help implementing custom Up navigation. 3337 * The AppNavigation sample application in the Android SDK is also available for reference.</p> 3338 * 3339 * @return true if Up navigation completed successfully and this Activity was finished, 3340 * false otherwise. 3341 */ 3342 public boolean onNavigateUp() { 3343 // Automatically handle hierarchical Up navigation if the proper 3344 // metadata is available. 3345 Intent upIntent = getParentActivityIntent(); 3346 if (upIntent != null) { 3347 if (mActivityInfo.taskAffinity == null) { 3348 // Activities with a null affinity are special; they really shouldn't 3349 // specify a parent activity intent in the first place. Just finish 3350 // the current activity and call it a day. 3351 finish(); 3352 } else if (shouldUpRecreateTask(upIntent)) { 3353 TaskStackBuilder b = TaskStackBuilder.create(this); 3354 onCreateNavigateUpTaskStack(b); 3355 onPrepareNavigateUpTaskStack(b); 3356 b.startActivities(); 3357 3358 // We can't finishAffinity if we have a result. 3359 // Fall back and simply finish the current activity instead. 3360 if (mResultCode != RESULT_CANCELED || mResultData != null) { 3361 // Tell the developer what's going on to avoid hair-pulling. 3362 Log.i(TAG, "onNavigateUp only finishing topmost activity to return a result"); 3363 finish(); 3364 } else { 3365 finishAffinity(); 3366 } 3367 } else { 3368 navigateUpTo(upIntent); 3369 } 3370 return true; 3371 } 3372 return false; 3373 } 3374 3375 /** 3376 * This is called when a child activity of this one attempts to navigate up. 3377 * The default implementation simply calls onNavigateUp() on this activity (the parent). 3378 * 3379 * @param child The activity making the call. 3380 */ 3381 public boolean onNavigateUpFromChild(Activity child) { 3382 return onNavigateUp(); 3383 } 3384 3385 /** 3386 * Define the synthetic task stack that will be generated during Up navigation from 3387 * a different task. 3388 * 3389 * <p>The default implementation of this method adds the parent chain of this activity 3390 * as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications 3391 * may choose to override this method to construct the desired task stack in a different 3392 * way.</p> 3393 * 3394 * <p>This method will be invoked by the default implementation of {@link #onNavigateUp()} 3395 * if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent 3396 * returned by {@link #getParentActivityIntent()}.</p> 3397 * 3398 * <p>Applications that wish to supply extra Intent parameters to the parent stack defined 3399 * by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}.</p> 3400 * 3401 * @param builder An empty TaskStackBuilder - the application should add intents representing 3402 * the desired task stack 3403 */ 3404 public void onCreateNavigateUpTaskStack(TaskStackBuilder builder) { 3405 builder.addParentStack(this); 3406 } 3407 3408 /** 3409 * Prepare the synthetic task stack that will be generated during Up navigation 3410 * from a different task. 3411 * 3412 * <p>This method receives the {@link TaskStackBuilder} with the constructed series of 3413 * Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}. 3414 * If any extra data should be added to these intents before launching the new task, 3415 * the application should override this method and add that data here.</p> 3416 * 3417 * @param builder A TaskStackBuilder that has been populated with Intents by 3418 * onCreateNavigateUpTaskStack. 3419 */ 3420 public void onPrepareNavigateUpTaskStack(TaskStackBuilder builder) { 3421 } 3422 3423 /** 3424 * This hook is called whenever the options menu is being closed (either by the user canceling 3425 * the menu with the back/menu button, or when an item is selected). 3426 * 3427 * @param menu The options menu as last shown or first initialized by 3428 * onCreateOptionsMenu(). 3429 */ 3430 public void onOptionsMenuClosed(Menu menu) { 3431 if (mParent != null) { 3432 mParent.onOptionsMenuClosed(menu); 3433 } 3434 } 3435 3436 /** 3437 * Programmatically opens the options menu. If the options menu is already 3438 * open, this method does nothing. 3439 */ 3440 public void openOptionsMenu() { 3441 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3442 (mActionBar == null || !mActionBar.openOptionsMenu())) { 3443 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 3444 } 3445 } 3446 3447 /** 3448 * Progammatically closes the options menu. If the options menu is already 3449 * closed, this method does nothing. 3450 */ 3451 public void closeOptionsMenu() { 3452 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL)) { 3453 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 3454 } 3455 } 3456 3457 /** 3458 * Called when a context menu for the {@code view} is about to be shown. 3459 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 3460 * time the context menu is about to be shown and should be populated for 3461 * the view (or item inside the view for {@link AdapterView} subclasses, 3462 * this can be found in the {@code menuInfo})). 3463 * <p> 3464 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 3465 * item has been selected. 3466 * <p> 3467 * It is not safe to hold onto the context menu after this method returns. 3468 * 3469 */ 3470 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 3471 } 3472 3473 /** 3474 * Registers a context menu to be shown for the given view (multiple views 3475 * can show the context menu). This method will set the 3476 * {@link OnCreateContextMenuListener} on the view to this activity, so 3477 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 3478 * called when it is time to show the context menu. 3479 * 3480 * @see #unregisterForContextMenu(View) 3481 * @param view The view that should show a context menu. 3482 */ 3483 public void registerForContextMenu(View view) { 3484 view.setOnCreateContextMenuListener(this); 3485 } 3486 3487 /** 3488 * Prevents a context menu to be shown for the given view. This method will remove the 3489 * {@link OnCreateContextMenuListener} on the view. 3490 * 3491 * @see #registerForContextMenu(View) 3492 * @param view The view that should stop showing a context menu. 3493 */ 3494 public void unregisterForContextMenu(View view) { 3495 view.setOnCreateContextMenuListener(null); 3496 } 3497 3498 /** 3499 * Programmatically opens the context menu for a particular {@code view}. 3500 * The {@code view} should have been added via 3501 * {@link #registerForContextMenu(View)}. 3502 * 3503 * @param view The view to show the context menu for. 3504 */ 3505 public void openContextMenu(View view) { 3506 view.showContextMenu(); 3507 } 3508 3509 /** 3510 * Programmatically closes the most recently opened context menu, if showing. 3511 */ 3512 public void closeContextMenu() { 3513 if (mWindow.hasFeature(Window.FEATURE_CONTEXT_MENU)) { 3514 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 3515 } 3516 } 3517 3518 /** 3519 * This hook is called whenever an item in a context menu is selected. The 3520 * default implementation simply returns false to have the normal processing 3521 * happen (calling the item's Runnable or sending a message to its Handler 3522 * as appropriate). You can use this method for any items for which you 3523 * would like to do processing without those other facilities. 3524 * <p> 3525 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 3526 * View that added this menu item. 3527 * <p> 3528 * Derived classes should call through to the base class for it to perform 3529 * the default menu handling. 3530 * 3531 * @param item The context menu item that was selected. 3532 * @return boolean Return false to allow normal context menu processing to 3533 * proceed, true to consume it here. 3534 */ 3535 public boolean onContextItemSelected(MenuItem item) { 3536 if (mParent != null) { 3537 return mParent.onContextItemSelected(item); 3538 } 3539 return false; 3540 } 3541 3542 /** 3543 * This hook is called whenever the context menu is being closed (either by 3544 * the user canceling the menu with the back/menu button, or when an item is 3545 * selected). 3546 * 3547 * @param menu The context menu that is being closed. 3548 */ 3549 public void onContextMenuClosed(Menu menu) { 3550 if (mParent != null) { 3551 mParent.onContextMenuClosed(menu); 3552 } 3553 } 3554 3555 /** 3556 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 3557 */ 3558 @Deprecated 3559 protected Dialog onCreateDialog(int id) { 3560 return null; 3561 } 3562 3563 /** 3564 * Callback for creating dialogs that are managed (saved and restored) for you 3565 * by the activity. The default implementation calls through to 3566 * {@link #onCreateDialog(int)} for compatibility. 3567 * 3568 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3569 * or later, consider instead using a {@link DialogFragment} instead.</em> 3570 * 3571 * <p>If you use {@link #showDialog(int)}, the activity will call through to 3572 * this method the first time, and hang onto it thereafter. Any dialog 3573 * that is created by this method will automatically be saved and restored 3574 * for you, including whether it is showing. 3575 * 3576 * <p>If you would like the activity to manage saving and restoring dialogs 3577 * for you, you should override this method and handle any ids that are 3578 * passed to {@link #showDialog}. 3579 * 3580 * <p>If you would like an opportunity to prepare your dialog before it is shown, 3581 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 3582 * 3583 * @param id The id of the dialog. 3584 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3585 * @return The dialog. If you return null, the dialog will not be created. 3586 * 3587 * @see #onPrepareDialog(int, Dialog, Bundle) 3588 * @see #showDialog(int, Bundle) 3589 * @see #dismissDialog(int) 3590 * @see #removeDialog(int) 3591 * 3592 * @deprecated Use the new {@link DialogFragment} class with 3593 * {@link FragmentManager} instead; this is also 3594 * available on older platforms through the Android compatibility package. 3595 */ 3596 @Nullable 3597 @Deprecated 3598 protected Dialog onCreateDialog(int id, Bundle args) { 3599 return onCreateDialog(id); 3600 } 3601 3602 /** 3603 * @deprecated Old no-arguments version of 3604 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 3605 */ 3606 @Deprecated 3607 protected void onPrepareDialog(int id, Dialog dialog) { 3608 dialog.setOwnerActivity(this); 3609 } 3610 3611 /** 3612 * Provides an opportunity to prepare a managed dialog before it is being 3613 * shown. The default implementation calls through to 3614 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 3615 * 3616 * <p> 3617 * Override this if you need to update a managed dialog based on the state 3618 * of the application each time it is shown. For example, a time picker 3619 * dialog might want to be updated with the current time. You should call 3620 * through to the superclass's implementation. The default implementation 3621 * will set this Activity as the owner activity on the Dialog. 3622 * 3623 * @param id The id of the managed dialog. 3624 * @param dialog The dialog. 3625 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3626 * @see #onCreateDialog(int, Bundle) 3627 * @see #showDialog(int) 3628 * @see #dismissDialog(int) 3629 * @see #removeDialog(int) 3630 * 3631 * @deprecated Use the new {@link DialogFragment} class with 3632 * {@link FragmentManager} instead; this is also 3633 * available on older platforms through the Android compatibility package. 3634 */ 3635 @Deprecated 3636 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 3637 onPrepareDialog(id, dialog); 3638 } 3639 3640 /** 3641 * Simple version of {@link #showDialog(int, Bundle)} that does not 3642 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 3643 * with null arguments. 3644 * 3645 * @deprecated Use the new {@link DialogFragment} class with 3646 * {@link FragmentManager} instead; this is also 3647 * available on older platforms through the Android compatibility package. 3648 */ 3649 @Deprecated 3650 public final void showDialog(int id) { 3651 showDialog(id, null); 3652 } 3653 3654 /** 3655 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 3656 * will be made with the same id the first time this is called for a given 3657 * id. From thereafter, the dialog will be automatically saved and restored. 3658 * 3659 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3660 * or later, consider instead using a {@link DialogFragment} instead.</em> 3661 * 3662 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 3663 * be made to provide an opportunity to do any timely preparation. 3664 * 3665 * @param id The id of the managed dialog. 3666 * @param args Arguments to pass through to the dialog. These will be saved 3667 * and restored for you. Note that if the dialog is already created, 3668 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 3669 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 3670 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 3671 * @return Returns true if the Dialog was created; false is returned if 3672 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 3673 * 3674 * @see Dialog 3675 * @see #onCreateDialog(int, Bundle) 3676 * @see #onPrepareDialog(int, Dialog, Bundle) 3677 * @see #dismissDialog(int) 3678 * @see #removeDialog(int) 3679 * 3680 * @deprecated Use the new {@link DialogFragment} class with 3681 * {@link FragmentManager} instead; this is also 3682 * available on older platforms through the Android compatibility package. 3683 */ 3684 @Nullable 3685 @Deprecated 3686 public final boolean showDialog(int id, Bundle args) { 3687 if (mManagedDialogs == null) { 3688 mManagedDialogs = new SparseArray<ManagedDialog>(); 3689 } 3690 ManagedDialog md = mManagedDialogs.get(id); 3691 if (md == null) { 3692 md = new ManagedDialog(); 3693 md.mDialog = createDialog(id, null, args); 3694 if (md.mDialog == null) { 3695 return false; 3696 } 3697 mManagedDialogs.put(id, md); 3698 } 3699 3700 md.mArgs = args; 3701 onPrepareDialog(id, md.mDialog, args); 3702 md.mDialog.show(); 3703 return true; 3704 } 3705 3706 /** 3707 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 3708 * 3709 * @param id The id of the managed dialog. 3710 * 3711 * @throws IllegalArgumentException if the id was not previously shown via 3712 * {@link #showDialog(int)}. 3713 * 3714 * @see #onCreateDialog(int, Bundle) 3715 * @see #onPrepareDialog(int, Dialog, Bundle) 3716 * @see #showDialog(int) 3717 * @see #removeDialog(int) 3718 * 3719 * @deprecated Use the new {@link DialogFragment} class with 3720 * {@link FragmentManager} instead; this is also 3721 * available on older platforms through the Android compatibility package. 3722 */ 3723 @Deprecated 3724 public final void dismissDialog(int id) { 3725 if (mManagedDialogs == null) { 3726 throw missingDialog(id); 3727 } 3728 3729 final ManagedDialog md = mManagedDialogs.get(id); 3730 if (md == null) { 3731 throw missingDialog(id); 3732 } 3733 md.mDialog.dismiss(); 3734 } 3735 3736 /** 3737 * Creates an exception to throw if a user passed in a dialog id that is 3738 * unexpected. 3739 */ 3740 private IllegalArgumentException missingDialog(int id) { 3741 return new IllegalArgumentException("no dialog with id " + id + " was ever " 3742 + "shown via Activity#showDialog"); 3743 } 3744 3745 /** 3746 * Removes any internal references to a dialog managed by this Activity. 3747 * If the dialog is showing, it will dismiss it as part of the clean up. 3748 * 3749 * <p>This can be useful if you know that you will never show a dialog again and 3750 * want to avoid the overhead of saving and restoring it in the future. 3751 * 3752 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 3753 * will not throw an exception if you try to remove an ID that does not 3754 * currently have an associated dialog.</p> 3755 * 3756 * @param id The id of the managed dialog. 3757 * 3758 * @see #onCreateDialog(int, Bundle) 3759 * @see #onPrepareDialog(int, Dialog, Bundle) 3760 * @see #showDialog(int) 3761 * @see #dismissDialog(int) 3762 * 3763 * @deprecated Use the new {@link DialogFragment} class with 3764 * {@link FragmentManager} instead; this is also 3765 * available on older platforms through the Android compatibility package. 3766 */ 3767 @Deprecated 3768 public final void removeDialog(int id) { 3769 if (mManagedDialogs != null) { 3770 final ManagedDialog md = mManagedDialogs.get(id); 3771 if (md != null) { 3772 md.mDialog.dismiss(); 3773 mManagedDialogs.remove(id); 3774 } 3775 } 3776 } 3777 3778 /** 3779 * This hook is called when the user signals the desire to start a search. 3780 * 3781 * <p>You can use this function as a simple way to launch the search UI, in response to a 3782 * menu item, search button, or other widgets within your activity. Unless overidden, 3783 * calling this function is the same as calling 3784 * {@link #startSearch startSearch(null, false, null, false)}, which launches 3785 * search for the current activity as specified in its manifest, see {@link SearchManager}. 3786 * 3787 * <p>You can override this function to force global search, e.g. in response to a dedicated 3788 * search key, or to block search entirely (by simply returning false). 3789 * 3790 * <p>Note: when running in a {@link Configuration#UI_MODE_TYPE_TELEVISION}, the default 3791 * implementation changes to simply return false and you must supply your own custom 3792 * implementation if you want to support search.</p> 3793 * 3794 * @param searchEvent The {@link SearchEvent} that signaled this search. 3795 * @return Returns {@code true} if search launched, and {@code false} if the activity does 3796 * not respond to search. The default implementation always returns {@code true}, except 3797 * when in {@link Configuration#UI_MODE_TYPE_TELEVISION} mode where it returns false. 3798 * 3799 * @see android.app.SearchManager 3800 */ 3801 public boolean onSearchRequested(@Nullable SearchEvent searchEvent) { 3802 mSearchEvent = searchEvent; 3803 boolean result = onSearchRequested(); 3804 mSearchEvent = null; 3805 return result; 3806 } 3807 3808 /** 3809 * @see #onSearchRequested(SearchEvent) 3810 */ 3811 public boolean onSearchRequested() { 3812 if ((getResources().getConfiguration().uiMode&Configuration.UI_MODE_TYPE_MASK) 3813 != Configuration.UI_MODE_TYPE_TELEVISION) { 3814 startSearch(null, false, null, false); 3815 return true; 3816 } else { 3817 return false; 3818 } 3819 } 3820 3821 /** 3822 * During the onSearchRequested() callbacks, this function will return the 3823 * {@link SearchEvent} that triggered the callback, if it exists. 3824 * 3825 * @return SearchEvent The SearchEvent that triggered the {@link 3826 * #onSearchRequested} callback. 3827 */ 3828 public final SearchEvent getSearchEvent() { 3829 return mSearchEvent; 3830 } 3831 3832 /** 3833 * This hook is called to launch the search UI. 3834 * 3835 * <p>It is typically called from onSearchRequested(), either directly from 3836 * Activity.onSearchRequested() or from an overridden version in any given 3837 * Activity. If your goal is simply to activate search, it is preferred to call 3838 * onSearchRequested(), which may have been overridden elsewhere in your Activity. If your goal 3839 * is to inject specific data such as context data, it is preferred to <i>override</i> 3840 * onSearchRequested(), so that any callers to it will benefit from the override. 3841 * 3842 * @param initialQuery Any non-null non-empty string will be inserted as 3843 * pre-entered text in the search query box. 3844 * @param selectInitialQuery If true, the initial query will be preselected, which means that 3845 * any further typing will replace it. This is useful for cases where an entire pre-formed 3846 * query is being inserted. If false, the selection point will be placed at the end of the 3847 * inserted query. This is useful when the inserted query is text that the user entered, 3848 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 3849 * if initialQuery is a non-empty string.</i> 3850 * @param appSearchData An application can insert application-specific 3851 * context here, in order to improve quality or specificity of its own 3852 * searches. This data will be returned with SEARCH intent(s). Null if 3853 * no extra data is required. 3854 * @param globalSearch If false, this will only launch the search that has been specifically 3855 * defined by the application (which is usually defined as a local search). If no default 3856 * search is defined in the current application or activity, global search will be launched. 3857 * If true, this will always launch a platform-global (e.g. web-based) search instead. 3858 * 3859 * @see android.app.SearchManager 3860 * @see #onSearchRequested 3861 */ 3862 public void startSearch(@Nullable String initialQuery, boolean selectInitialQuery, 3863 @Nullable Bundle appSearchData, boolean globalSearch) { 3864 ensureSearchManager(); 3865 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 3866 appSearchData, globalSearch); 3867 } 3868 3869 /** 3870 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 3871 * the search dialog. Made available for testing purposes. 3872 * 3873 * @param query The query to trigger. If empty, the request will be ignored. 3874 * @param appSearchData An application can insert application-specific 3875 * context here, in order to improve quality or specificity of its own 3876 * searches. This data will be returned with SEARCH intent(s). Null if 3877 * no extra data is required. 3878 */ 3879 public void triggerSearch(String query, @Nullable Bundle appSearchData) { 3880 ensureSearchManager(); 3881 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 3882 } 3883 3884 /** 3885 * Request that key events come to this activity. Use this if your 3886 * activity has no views with focus, but the activity still wants 3887 * a chance to process key events. 3888 * 3889 * @see android.view.Window#takeKeyEvents 3890 */ 3891 public void takeKeyEvents(boolean get) { 3892 getWindow().takeKeyEvents(get); 3893 } 3894 3895 /** 3896 * Enable extended window features. This is a convenience for calling 3897 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 3898 * 3899 * @param featureId The desired feature as defined in 3900 * {@link android.view.Window}. 3901 * @return Returns true if the requested feature is supported and now 3902 * enabled. 3903 * 3904 * @see android.view.Window#requestFeature 3905 */ 3906 public final boolean requestWindowFeature(int featureId) { 3907 return getWindow().requestFeature(featureId); 3908 } 3909 3910 /** 3911 * Convenience for calling 3912 * {@link android.view.Window#setFeatureDrawableResource}. 3913 */ 3914 public final void setFeatureDrawableResource(int featureId, @DrawableRes int resId) { 3915 getWindow().setFeatureDrawableResource(featureId, resId); 3916 } 3917 3918 /** 3919 * Convenience for calling 3920 * {@link android.view.Window#setFeatureDrawableUri}. 3921 */ 3922 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3923 getWindow().setFeatureDrawableUri(featureId, uri); 3924 } 3925 3926 /** 3927 * Convenience for calling 3928 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3929 */ 3930 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3931 getWindow().setFeatureDrawable(featureId, drawable); 3932 } 3933 3934 /** 3935 * Convenience for calling 3936 * {@link android.view.Window#setFeatureDrawableAlpha}. 3937 */ 3938 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3939 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3940 } 3941 3942 /** 3943 * Convenience for calling 3944 * {@link android.view.Window#getLayoutInflater}. 3945 */ 3946 @NonNull 3947 public LayoutInflater getLayoutInflater() { 3948 return getWindow().getLayoutInflater(); 3949 } 3950 3951 /** 3952 * Returns a {@link MenuInflater} with this context. 3953 */ 3954 @NonNull 3955 public MenuInflater getMenuInflater() { 3956 // Make sure that action views can get an appropriate theme. 3957 if (mMenuInflater == null) { 3958 initWindowDecorActionBar(); 3959 if (mActionBar != null) { 3960 mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this); 3961 } else { 3962 mMenuInflater = new MenuInflater(this); 3963 } 3964 } 3965 return mMenuInflater; 3966 } 3967 3968 @Override 3969 public void setTheme(int resid) { 3970 super.setTheme(resid); 3971 mWindow.setTheme(resid); 3972 } 3973 3974 @Override 3975 protected void onApplyThemeResource(Resources.Theme theme, @StyleRes int resid, 3976 boolean first) { 3977 if (mParent == null) { 3978 super.onApplyThemeResource(theme, resid, first); 3979 } else { 3980 try { 3981 theme.setTo(mParent.getTheme()); 3982 } catch (Exception e) { 3983 // Empty 3984 } 3985 theme.applyStyle(resid, false); 3986 } 3987 3988 // Get the primary color and update the TaskDescription for this activity 3989 TypedArray a = theme.obtainStyledAttributes( 3990 com.android.internal.R.styleable.ActivityTaskDescription); 3991 if (mTaskDescription.getPrimaryColor() == 0) { 3992 int colorPrimary = a.getColor( 3993 com.android.internal.R.styleable.ActivityTaskDescription_colorPrimary, 0); 3994 if (colorPrimary != 0 && Color.alpha(colorPrimary) == 0xFF) { 3995 mTaskDescription.setPrimaryColor(colorPrimary); 3996 } 3997 } 3998 // For dev-preview only. 3999 if (mTaskDescription.getBackgroundColor() == 0) { 4000 int colorBackground = a.getColor( 4001 com.android.internal.R.styleable.ActivityTaskDescription_colorBackground, 0); 4002 if (colorBackground != 0 && Color.alpha(colorBackground) == 0xFF) { 4003 mTaskDescription.setBackgroundColor(colorBackground); 4004 } 4005 } 4006 a.recycle(); 4007 setTaskDescription(mTaskDescription); 4008 } 4009 4010 /** 4011 * Requests permissions to be granted to this application. These permissions 4012 * must be requested in your manifest, they should not be granted to your app, 4013 * and they should have protection level {@link android.content.pm.PermissionInfo 4014 * #PROTECTION_DANGEROUS dangerous}, regardless whether they are declared by 4015 * the platform or a third-party app. 4016 * <p> 4017 * Normal permissions {@link android.content.pm.PermissionInfo#PROTECTION_NORMAL} 4018 * are granted at install time if requested in the manifest. Signature permissions 4019 * {@link android.content.pm.PermissionInfo#PROTECTION_SIGNATURE} are granted at 4020 * install time if requested in the manifest and the signature of your app matches 4021 * the signature of the app declaring the permissions. 4022 * </p> 4023 * <p> 4024 * If your app does not have the requested permissions the user will be presented 4025 * with UI for accepting them. After the user has accepted or rejected the 4026 * requested permissions you will receive a callback on {@link 4027 * #onRequestPermissionsResult(int, String[], int[])} reporting whether the 4028 * permissions were granted or not. 4029 * </p> 4030 * <p> 4031 * Note that requesting a permission does not guarantee it will be granted and 4032 * your app should be able to run without having this permission. 4033 * </p> 4034 * <p> 4035 * This method may start an activity allowing the user to choose which permissions 4036 * to grant and which to reject. Hence, you should be prepared that your activity 4037 * may be paused and resumed. Further, granting some permissions may require 4038 * a restart of you application. In such a case, the system will recreate the 4039 * activity stack before delivering the result to {@link 4040 * #onRequestPermissionsResult(int, String[], int[])}. 4041 * </p> 4042 * <p> 4043 * When checking whether you have a permission you should use {@link 4044 * #checkSelfPermission(String)}. 4045 * </p> 4046 * <p> 4047 * Calling this API for permissions already granted to your app would show UI 4048 * to the user to decide whether the app can still hold these permissions. This 4049 * can be useful if the way your app uses data guarded by the permissions 4050 * changes significantly. 4051 * </p> 4052 * <p> 4053 * You cannot request a permission if your activity sets {@link 4054 * android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 4055 * <code>true</code> because in this case the activity would not receive 4056 * result callbacks including {@link #onRequestPermissionsResult(int, String[], int[])}. 4057 * </p> 4058 * <p> 4059 * A sample permissions request looks like this: 4060 * </p> 4061 * <code><pre><p> 4062 * private void showContacts() { 4063 * if (checkSelfPermission(Manifest.permission.READ_CONTACTS) 4064 * != PackageManager.PERMISSION_GRANTED) { 4065 * requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, 4066 * PERMISSIONS_REQUEST_READ_CONTACTS); 4067 * } else { 4068 * doShowContacts(); 4069 * } 4070 * } 4071 * 4072 * {@literal @}Override 4073 * public void onRequestPermissionsResult(int requestCode, String[] permissions, 4074 * int[] grantResults) { 4075 * if (requestCode == PERMISSIONS_REQUEST_READ_CONTACTS 4076 * && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 4077 * showContacts(); 4078 * } 4079 * } 4080 * </code></pre></p> 4081 * 4082 * @param permissions The requested permissions. Must me non-null and not empty. 4083 * @param requestCode Application specific request code to match with a result 4084 * reported to {@link #onRequestPermissionsResult(int, String[], int[])}. 4085 * Should be >= 0. 4086 * 4087 * @throws IllegalArgumentException if requestCode is negative. 4088 * 4089 * @see #onRequestPermissionsResult(int, String[], int[]) 4090 * @see #checkSelfPermission(String) 4091 * @see #shouldShowRequestPermissionRationale(String) 4092 */ 4093 public final void requestPermissions(@NonNull String[] permissions, int requestCode) { 4094 if (requestCode < 0) { 4095 throw new IllegalArgumentException("requestCode should be >= 0"); 4096 } 4097 if (mHasCurrentPermissionsRequest) { 4098 Log.w(TAG, "Can reqeust only one set of permissions at a time"); 4099 // Dispatch the callback with empty arrays which means a cancellation. 4100 onRequestPermissionsResult(requestCode, new String[0], new int[0]); 4101 return; 4102 } 4103 Intent intent = getPackageManager().buildRequestPermissionsIntent(permissions); 4104 startActivityForResult(REQUEST_PERMISSIONS_WHO_PREFIX, intent, requestCode, null); 4105 mHasCurrentPermissionsRequest = true; 4106 } 4107 4108 /** 4109 * Callback for the result from requesting permissions. This method 4110 * is invoked for every call on {@link #requestPermissions(String[], int)}. 4111 * <p> 4112 * <strong>Note:</strong> It is possible that the permissions request interaction 4113 * with the user is interrupted. In this case you will receive empty permissions 4114 * and results arrays which should be treated as a cancellation. 4115 * </p> 4116 * 4117 * @param requestCode The request code passed in {@link #requestPermissions(String[], int)}. 4118 * @param permissions The requested permissions. Never null. 4119 * @param grantResults The grant results for the corresponding permissions 4120 * which is either {@link android.content.pm.PackageManager#PERMISSION_GRANTED} 4121 * or {@link android.content.pm.PackageManager#PERMISSION_DENIED}. Never null. 4122 * 4123 * @see #requestPermissions(String[], int) 4124 */ 4125 public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, 4126 @NonNull int[] grantResults) { 4127 /* callback - no nothing */ 4128 } 4129 4130 /** 4131 * Gets whether you should show UI with rationale for requesting a permission. 4132 * You should do this only if you do not have the permission and the context in 4133 * which the permission is requested does not clearly communicate to the user 4134 * what would be the benefit from granting this permission. 4135 * <p> 4136 * For example, if you write a camera app, requesting the camera permission 4137 * would be expected by the user and no rationale for why it is requested is 4138 * needed. If however, the app needs location for tagging photos then a non-tech 4139 * savvy user may wonder how location is related to taking photos. In this case 4140 * you may choose to show UI with rationale of requesting this permission. 4141 * </p> 4142 * 4143 * @param permission A permission your app wants to request. 4144 * @return Whether you can show permission rationale UI. 4145 * 4146 * @see #checkSelfPermission(String) 4147 * @see #requestPermissions(String[], int) 4148 * @see #onRequestPermissionsResult(int, String[], int[]) 4149 */ 4150 public boolean shouldShowRequestPermissionRationale(@NonNull String permission) { 4151 return getPackageManager().shouldShowRequestPermissionRationale(permission); 4152 } 4153 4154 /** 4155 * Same as calling {@link #startActivityForResult(Intent, int, Bundle)} 4156 * with no options. 4157 * 4158 * @param intent The intent to start. 4159 * @param requestCode If >= 0, this code will be returned in 4160 * onActivityResult() when the activity exits. 4161 * 4162 * @throws android.content.ActivityNotFoundException 4163 * 4164 * @see #startActivity 4165 */ 4166 public void startActivityForResult(@RequiresPermission Intent intent, int requestCode) { 4167 startActivityForResult(intent, requestCode, null); 4168 } 4169 4170 /** 4171 * Launch an activity for which you would like a result when it finished. 4172 * When this activity exits, your 4173 * onActivityResult() method will be called with the given requestCode. 4174 * Using a negative requestCode is the same as calling 4175 * {@link #startActivity} (the activity is not launched as a sub-activity). 4176 * 4177 * <p>Note that this method should only be used with Intent protocols 4178 * that are defined to return a result. In other protocols (such as 4179 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 4180 * not get the result when you expect. For example, if the activity you 4181 * are launching uses the singleTask launch mode, it will not run in your 4182 * task and thus you will immediately receive a cancel result. 4183 * 4184 * <p>As a special case, if you call startActivityForResult() with a requestCode 4185 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 4186 * activity, then your window will not be displayed until a result is 4187 * returned back from the started activity. This is to avoid visible 4188 * flickering when redirecting to another activity. 4189 * 4190 * <p>This method throws {@link android.content.ActivityNotFoundException} 4191 * if there was no Activity found to run the given Intent. 4192 * 4193 * @param intent The intent to start. 4194 * @param requestCode If >= 0, this code will be returned in 4195 * onActivityResult() when the activity exits. 4196 * @param options Additional options for how the Activity should be started. 4197 * See {@link android.content.Context#startActivity(Intent, Bundle) 4198 * Context.startActivity(Intent, Bundle)} for more details. 4199 * 4200 * @throws android.content.ActivityNotFoundException 4201 * 4202 * @see #startActivity 4203 */ 4204 public void startActivityForResult(@RequiresPermission Intent intent, int requestCode, 4205 @Nullable Bundle options) { 4206 if (mParent == null) { 4207 Instrumentation.ActivityResult ar = 4208 mInstrumentation.execStartActivity( 4209 this, mMainThread.getApplicationThread(), mToken, this, 4210 intent, requestCode, options); 4211 if (ar != null) { 4212 mMainThread.sendActivityResult( 4213 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 4214 ar.getResultData()); 4215 } 4216 if (requestCode >= 0) { 4217 // If this start is requesting a result, we can avoid making 4218 // the activity visible until the result is received. Setting 4219 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4220 // activity hidden during this time, to avoid flickering. 4221 // This can only be done when a result is requested because 4222 // that guarantees we will get information back when the 4223 // activity is finished, no matter what happens to it. 4224 mStartedActivity = true; 4225 } 4226 4227 cancelInputsAndStartExitTransition(options); 4228 // TODO Consider clearing/flushing other event sources and events for child windows. 4229 } else { 4230 if (options != null) { 4231 mParent.startActivityFromChild(this, intent, requestCode, options); 4232 } else { 4233 // Note we want to go through this method for compatibility with 4234 // existing applications that may have overridden it. 4235 mParent.startActivityFromChild(this, intent, requestCode); 4236 } 4237 } 4238 } 4239 4240 /** 4241 * Cancels pending inputs and if an Activity Transition is to be run, starts the transition. 4242 * 4243 * @param options The ActivityOptions bundle used to start an Activity. 4244 */ 4245 private void cancelInputsAndStartExitTransition(Bundle options) { 4246 final View decor = mWindow != null ? mWindow.peekDecorView() : null; 4247 if (decor != null) { 4248 decor.cancelPendingInputEvents(); 4249 } 4250 if (options != null && !isTopOfTask()) { 4251 mActivityTransitionState.startExitOutTransition(this, options); 4252 } 4253 } 4254 4255 /** 4256 * @hide Implement to provide correct calling token. 4257 */ 4258 public void startActivityForResultAsUser(Intent intent, int requestCode, UserHandle user) { 4259 startActivityForResultAsUser(intent, requestCode, null, user); 4260 } 4261 4262 /** 4263 * @hide Implement to provide correct calling token. 4264 */ 4265 public void startActivityForResultAsUser(Intent intent, int requestCode, 4266 @Nullable Bundle options, UserHandle user) { 4267 if (mParent != null) { 4268 throw new RuntimeException("Can't be called from a child"); 4269 } 4270 Instrumentation.ActivityResult ar = mInstrumentation.execStartActivity( 4271 this, mMainThread.getApplicationThread(), mToken, this, intent, requestCode, 4272 options, user); 4273 if (ar != null) { 4274 mMainThread.sendActivityResult( 4275 mToken, mEmbeddedID, requestCode, ar.getResultCode(), ar.getResultData()); 4276 } 4277 if (requestCode >= 0) { 4278 // If this start is requesting a result, we can avoid making 4279 // the activity visible until the result is received. Setting 4280 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4281 // activity hidden during this time, to avoid flickering. 4282 // This can only be done when a result is requested because 4283 // that guarantees we will get information back when the 4284 // activity is finished, no matter what happens to it. 4285 mStartedActivity = true; 4286 } 4287 4288 cancelInputsAndStartExitTransition(options); 4289 } 4290 4291 /** 4292 * @hide Implement to provide correct calling token. 4293 */ 4294 public void startActivityAsUser(Intent intent, UserHandle user) { 4295 startActivityAsUser(intent, null, user); 4296 } 4297 4298 /** 4299 * @hide Implement to provide correct calling token. 4300 */ 4301 public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) { 4302 if (mParent != null) { 4303 throw new RuntimeException("Can't be called from a child"); 4304 } 4305 Instrumentation.ActivityResult ar = 4306 mInstrumentation.execStartActivity( 4307 this, mMainThread.getApplicationThread(), mToken, this, 4308 intent, -1, options, user); 4309 if (ar != null) { 4310 mMainThread.sendActivityResult( 4311 mToken, mEmbeddedID, -1, ar.getResultCode(), 4312 ar.getResultData()); 4313 } 4314 cancelInputsAndStartExitTransition(options); 4315 } 4316 4317 /** 4318 * Start a new activity as if it was started by the activity that started our 4319 * current activity. This is for the resolver and chooser activities, which operate 4320 * as intermediaries that dispatch their intent to the target the user selects -- to 4321 * do this, they must perform all security checks including permission grants as if 4322 * their launch had come from the original activity. 4323 * @param intent The Intent to start. 4324 * @param options ActivityOptions or null. 4325 * @param ignoreTargetSecurity If true, the activity manager will not check whether the 4326 * caller it is doing the start is, is actually allowed to start the target activity. 4327 * If you set this to true, you must set an explicit component in the Intent and do any 4328 * appropriate security checks yourself. 4329 * @param userId The user the new activity should run as. 4330 * @hide 4331 */ 4332 public void startActivityAsCaller(Intent intent, @Nullable Bundle options, 4333 boolean ignoreTargetSecurity, int userId) { 4334 if (mParent != null) { 4335 throw new RuntimeException("Can't be called from a child"); 4336 } 4337 Instrumentation.ActivityResult ar = 4338 mInstrumentation.execStartActivityAsCaller( 4339 this, mMainThread.getApplicationThread(), mToken, this, 4340 intent, -1, options, ignoreTargetSecurity, userId); 4341 if (ar != null) { 4342 mMainThread.sendActivityResult( 4343 mToken, mEmbeddedID, -1, ar.getResultCode(), 4344 ar.getResultData()); 4345 } 4346 cancelInputsAndStartExitTransition(options); 4347 } 4348 4349 /** 4350 * Same as calling {@link #startIntentSenderForResult(IntentSender, int, 4351 * Intent, int, int, int, Bundle)} with no options. 4352 * 4353 * @param intent The IntentSender to launch. 4354 * @param requestCode If >= 0, this code will be returned in 4355 * onActivityResult() when the activity exits. 4356 * @param fillInIntent If non-null, this will be provided as the 4357 * intent parameter to {@link IntentSender#sendIntent}. 4358 * @param flagsMask Intent flags in the original IntentSender that you 4359 * would like to change. 4360 * @param flagsValues Desired values for any bits set in 4361 * <var>flagsMask</var> 4362 * @param extraFlags Always set to 0. 4363 */ 4364 public void startIntentSenderForResult(IntentSender intent, int requestCode, 4365 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4366 throws IntentSender.SendIntentException { 4367 startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, 4368 flagsValues, extraFlags, null); 4369 } 4370 4371 /** 4372 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 4373 * to use a IntentSender to describe the activity to be started. If 4374 * the IntentSender is for an activity, that activity will be started 4375 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 4376 * here; otherwise, its associated action will be executed (such as 4377 * sending a broadcast) as if you had called 4378 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 4379 * 4380 * @param intent The IntentSender to launch. 4381 * @param requestCode If >= 0, this code will be returned in 4382 * onActivityResult() when the activity exits. 4383 * @param fillInIntent If non-null, this will be provided as the 4384 * intent parameter to {@link IntentSender#sendIntent}. 4385 * @param flagsMask Intent flags in the original IntentSender that you 4386 * would like to change. 4387 * @param flagsValues Desired values for any bits set in 4388 * <var>flagsMask</var> 4389 * @param extraFlags Always set to 0. 4390 * @param options Additional options for how the Activity should be started. 4391 * See {@link android.content.Context#startActivity(Intent, Bundle) 4392 * Context.startActivity(Intent, Bundle)} for more details. If options 4393 * have also been supplied by the IntentSender, options given here will 4394 * override any that conflict with those given by the IntentSender. 4395 */ 4396 public void startIntentSenderForResult(IntentSender intent, int requestCode, 4397 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4398 Bundle options) throws IntentSender.SendIntentException { 4399 if (mParent == null) { 4400 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 4401 flagsMask, flagsValues, this, options); 4402 } else if (options != null) { 4403 mParent.startIntentSenderFromChild(this, intent, requestCode, 4404 fillInIntent, flagsMask, flagsValues, extraFlags, options); 4405 } else { 4406 // Note we want to go through this call for compatibility with 4407 // existing applications that may have overridden the method. 4408 mParent.startIntentSenderFromChild(this, intent, requestCode, 4409 fillInIntent, flagsMask, flagsValues, extraFlags); 4410 } 4411 } 4412 4413 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 4414 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity, 4415 Bundle options) 4416 throws IntentSender.SendIntentException { 4417 try { 4418 String resolvedType = null; 4419 if (fillInIntent != null) { 4420 fillInIntent.migrateExtraStreamToClipData(); 4421 fillInIntent.prepareToLeaveProcess(this); 4422 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 4423 } 4424 int result = ActivityManagerNative.getDefault() 4425 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 4426 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 4427 requestCode, flagsMask, flagsValues, options); 4428 if (result == ActivityManager.START_CANCELED) { 4429 throw new IntentSender.SendIntentException(); 4430 } 4431 Instrumentation.checkStartActivityResult(result, null); 4432 } catch (RemoteException e) { 4433 } 4434 if (requestCode >= 0) { 4435 // If this start is requesting a result, we can avoid making 4436 // the activity visible until the result is received. Setting 4437 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4438 // activity hidden during this time, to avoid flickering. 4439 // This can only be done when a result is requested because 4440 // that guarantees we will get information back when the 4441 // activity is finished, no matter what happens to it. 4442 mStartedActivity = true; 4443 } 4444 } 4445 4446 /** 4447 * Same as {@link #startActivity(Intent, Bundle)} with no options 4448 * specified. 4449 * 4450 * @param intent The intent to start. 4451 * 4452 * @throws android.content.ActivityNotFoundException 4453 * 4454 * @see {@link #startActivity(Intent, Bundle)} 4455 * @see #startActivityForResult 4456 */ 4457 @Override 4458 public void startActivity(Intent intent) { 4459 this.startActivity(intent, null); 4460 } 4461 4462 /** 4463 * Launch a new activity. You will not receive any information about when 4464 * the activity exits. This implementation overrides the base version, 4465 * providing information about 4466 * the activity performing the launch. Because of this additional 4467 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4468 * required; if not specified, the new activity will be added to the 4469 * task of the caller. 4470 * 4471 * <p>This method throws {@link android.content.ActivityNotFoundException} 4472 * if there was no Activity found to run the given Intent. 4473 * 4474 * @param intent The intent to start. 4475 * @param options Additional options for how the Activity should be started. 4476 * See {@link android.content.Context#startActivity(Intent, Bundle) 4477 * Context.startActivity(Intent, Bundle)} for more details. 4478 * 4479 * @throws android.content.ActivityNotFoundException 4480 * 4481 * @see {@link #startActivity(Intent)} 4482 * @see #startActivityForResult 4483 */ 4484 @Override 4485 public void startActivity(Intent intent, @Nullable Bundle options) { 4486 if (options != null) { 4487 startActivityForResult(intent, -1, options); 4488 } else { 4489 // Note we want to go through this call for compatibility with 4490 // applications that may have overridden the method. 4491 startActivityForResult(intent, -1); 4492 } 4493 } 4494 4495 /** 4496 * Same as {@link #startActivities(Intent[], Bundle)} with no options 4497 * specified. 4498 * 4499 * @param intents The intents to start. 4500 * 4501 * @throws android.content.ActivityNotFoundException 4502 * 4503 * @see {@link #startActivities(Intent[], Bundle)} 4504 * @see #startActivityForResult 4505 */ 4506 @Override 4507 public void startActivities(Intent[] intents) { 4508 startActivities(intents, null); 4509 } 4510 4511 /** 4512 * Launch a new activity. You will not receive any information about when 4513 * the activity exits. This implementation overrides the base version, 4514 * providing information about 4515 * the activity performing the launch. Because of this additional 4516 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4517 * required; if not specified, the new activity will be added to the 4518 * task of the caller. 4519 * 4520 * <p>This method throws {@link android.content.ActivityNotFoundException} 4521 * if there was no Activity found to run the given Intent. 4522 * 4523 * @param intents The intents to start. 4524 * @param options Additional options for how the Activity should be started. 4525 * See {@link android.content.Context#startActivity(Intent, Bundle) 4526 * Context.startActivity(Intent, Bundle)} for more details. 4527 * 4528 * @throws android.content.ActivityNotFoundException 4529 * 4530 * @see {@link #startActivities(Intent[])} 4531 * @see #startActivityForResult 4532 */ 4533 @Override 4534 public void startActivities(Intent[] intents, @Nullable Bundle options) { 4535 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 4536 mToken, this, intents, options); 4537 } 4538 4539 /** 4540 * Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 4541 * with no options. 4542 * 4543 * @param intent The IntentSender to launch. 4544 * @param fillInIntent If non-null, this will be provided as the 4545 * intent parameter to {@link IntentSender#sendIntent}. 4546 * @param flagsMask Intent flags in the original IntentSender that you 4547 * would like to change. 4548 * @param flagsValues Desired values for any bits set in 4549 * <var>flagsMask</var> 4550 * @param extraFlags Always set to 0. 4551 */ 4552 public void startIntentSender(IntentSender intent, 4553 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4554 throws IntentSender.SendIntentException { 4555 startIntentSender(intent, fillInIntent, flagsMask, flagsValues, 4556 extraFlags, null); 4557 } 4558 4559 /** 4560 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 4561 * to start; see 4562 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)} 4563 * for more information. 4564 * 4565 * @param intent The IntentSender to launch. 4566 * @param fillInIntent If non-null, this will be provided as the 4567 * intent parameter to {@link IntentSender#sendIntent}. 4568 * @param flagsMask Intent flags in the original IntentSender that you 4569 * would like to change. 4570 * @param flagsValues Desired values for any bits set in 4571 * <var>flagsMask</var> 4572 * @param extraFlags Always set to 0. 4573 * @param options Additional options for how the Activity should be started. 4574 * See {@link android.content.Context#startActivity(Intent, Bundle) 4575 * Context.startActivity(Intent, Bundle)} for more details. If options 4576 * have also been supplied by the IntentSender, options given here will 4577 * override any that conflict with those given by the IntentSender. 4578 */ 4579 public void startIntentSender(IntentSender intent, 4580 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4581 Bundle options) throws IntentSender.SendIntentException { 4582 if (options != null) { 4583 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4584 flagsValues, extraFlags, options); 4585 } else { 4586 // Note we want to go through this call for compatibility with 4587 // applications that may have overridden the method. 4588 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4589 flagsValues, extraFlags); 4590 } 4591 } 4592 4593 /** 4594 * Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)} 4595 * with no options. 4596 * 4597 * @param intent The intent to start. 4598 * @param requestCode If >= 0, this code will be returned in 4599 * onActivityResult() when the activity exits, as described in 4600 * {@link #startActivityForResult}. 4601 * 4602 * @return If a new activity was launched then true is returned; otherwise 4603 * false is returned and you must handle the Intent yourself. 4604 * 4605 * @see #startActivity 4606 * @see #startActivityForResult 4607 */ 4608 public boolean startActivityIfNeeded(@RequiresPermission @NonNull Intent intent, 4609 int requestCode) { 4610 return startActivityIfNeeded(intent, requestCode, null); 4611 } 4612 4613 /** 4614 * A special variation to launch an activity only if a new activity 4615 * instance is needed to handle the given Intent. In other words, this is 4616 * just like {@link #startActivityForResult(Intent, int)} except: if you are 4617 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 4618 * singleTask or singleTop 4619 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 4620 * and the activity 4621 * that handles <var>intent</var> is the same as your currently running 4622 * activity, then a new instance is not needed. In this case, instead of 4623 * the normal behavior of calling {@link #onNewIntent} this function will 4624 * return and you can handle the Intent yourself. 4625 * 4626 * <p>This function can only be called from a top-level activity; if it is 4627 * called from a child activity, a runtime exception will be thrown. 4628 * 4629 * @param intent The intent to start. 4630 * @param requestCode If >= 0, this code will be returned in 4631 * onActivityResult() when the activity exits, as described in 4632 * {@link #startActivityForResult}. 4633 * @param options Additional options for how the Activity should be started. 4634 * See {@link android.content.Context#startActivity(Intent, Bundle) 4635 * Context.startActivity(Intent, Bundle)} for more details. 4636 * 4637 * @return If a new activity was launched then true is returned; otherwise 4638 * false is returned and you must handle the Intent yourself. 4639 * 4640 * @see #startActivity 4641 * @see #startActivityForResult 4642 */ 4643 public boolean startActivityIfNeeded(@RequiresPermission @NonNull Intent intent, 4644 int requestCode, @Nullable Bundle options) { 4645 if (mParent == null) { 4646 int result = ActivityManager.START_RETURN_INTENT_TO_CALLER; 4647 try { 4648 Uri referrer = onProvideReferrer(); 4649 if (referrer != null) { 4650 intent.putExtra(Intent.EXTRA_REFERRER, referrer); 4651 } 4652 intent.migrateExtraStreamToClipData(); 4653 intent.prepareToLeaveProcess(this); 4654 result = ActivityManagerNative.getDefault() 4655 .startActivity(mMainThread.getApplicationThread(), getBasePackageName(), 4656 intent, intent.resolveTypeIfNeeded(getContentResolver()), mToken, 4657 mEmbeddedID, requestCode, ActivityManager.START_FLAG_ONLY_IF_NEEDED, 4658 null, options); 4659 } catch (RemoteException e) { 4660 // Empty 4661 } 4662 4663 Instrumentation.checkStartActivityResult(result, intent); 4664 4665 if (requestCode >= 0) { 4666 // If this start is requesting a result, we can avoid making 4667 // the activity visible until the result is received. Setting 4668 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4669 // activity hidden during this time, to avoid flickering. 4670 // This can only be done when a result is requested because 4671 // that guarantees we will get information back when the 4672 // activity is finished, no matter what happens to it. 4673 mStartedActivity = true; 4674 } 4675 return result != ActivityManager.START_RETURN_INTENT_TO_CALLER; 4676 } 4677 4678 throw new UnsupportedOperationException( 4679 "startActivityIfNeeded can only be called from a top-level activity"); 4680 } 4681 4682 /** 4683 * Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with 4684 * no options. 4685 * 4686 * @param intent The intent to dispatch to the next activity. For 4687 * correct behavior, this must be the same as the Intent that started 4688 * your own activity; the only changes you can make are to the extras 4689 * inside of it. 4690 * 4691 * @return Returns a boolean indicating whether there was another Activity 4692 * to start: true if there was a next activity to start, false if there 4693 * wasn't. In general, if true is returned you will then want to call 4694 * finish() on yourself. 4695 */ 4696 public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent) { 4697 return startNextMatchingActivity(intent, null); 4698 } 4699 4700 /** 4701 * Special version of starting an activity, for use when you are replacing 4702 * other activity components. You can use this to hand the Intent off 4703 * to the next Activity that can handle it. You typically call this in 4704 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 4705 * 4706 * @param intent The intent to dispatch to the next activity. For 4707 * correct behavior, this must be the same as the Intent that started 4708 * your own activity; the only changes you can make are to the extras 4709 * inside of it. 4710 * @param options Additional options for how the Activity should be started. 4711 * See {@link android.content.Context#startActivity(Intent, Bundle) 4712 * Context.startActivity(Intent, Bundle)} for more details. 4713 * 4714 * @return Returns a boolean indicating whether there was another Activity 4715 * to start: true if there was a next activity to start, false if there 4716 * wasn't. In general, if true is returned you will then want to call 4717 * finish() on yourself. 4718 */ 4719 public boolean startNextMatchingActivity(@RequiresPermission @NonNull Intent intent, 4720 @Nullable Bundle options) { 4721 if (mParent == null) { 4722 try { 4723 intent.migrateExtraStreamToClipData(); 4724 intent.prepareToLeaveProcess(this); 4725 return ActivityManagerNative.getDefault() 4726 .startNextMatchingActivity(mToken, intent, options); 4727 } catch (RemoteException e) { 4728 // Empty 4729 } 4730 return false; 4731 } 4732 4733 throw new UnsupportedOperationException( 4734 "startNextMatchingActivity can only be called from a top-level activity"); 4735 } 4736 4737 /** 4738 * Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)} 4739 * with no options. 4740 * 4741 * @param child The activity making the call. 4742 * @param intent The intent to start. 4743 * @param requestCode Reply request code. < 0 if reply is not requested. 4744 * 4745 * @throws android.content.ActivityNotFoundException 4746 * 4747 * @see #startActivity 4748 * @see #startActivityForResult 4749 */ 4750 public void startActivityFromChild(@NonNull Activity child, @RequiresPermission Intent intent, 4751 int requestCode) { 4752 startActivityFromChild(child, intent, requestCode, null); 4753 } 4754 4755 /** 4756 * This is called when a child activity of this one calls its 4757 * {@link #startActivity} or {@link #startActivityForResult} method. 4758 * 4759 * <p>This method throws {@link android.content.ActivityNotFoundException} 4760 * if there was no Activity found to run the given Intent. 4761 * 4762 * @param child The activity making the call. 4763 * @param intent The intent to start. 4764 * @param requestCode Reply request code. < 0 if reply is not requested. 4765 * @param options Additional options for how the Activity should be started. 4766 * See {@link android.content.Context#startActivity(Intent, Bundle) 4767 * Context.startActivity(Intent, Bundle)} for more details. 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, @Nullable Bundle options) { 4776 Instrumentation.ActivityResult ar = 4777 mInstrumentation.execStartActivity( 4778 this, mMainThread.getApplicationThread(), mToken, child, 4779 intent, requestCode, options); 4780 if (ar != null) { 4781 mMainThread.sendActivityResult( 4782 mToken, child.mEmbeddedID, requestCode, 4783 ar.getResultCode(), ar.getResultData()); 4784 } 4785 cancelInputsAndStartExitTransition(options); 4786 } 4787 4788 /** 4789 * Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)} 4790 * with no options. 4791 * 4792 * @param fragment The fragment making the call. 4793 * @param intent The intent to start. 4794 * @param requestCode Reply request code. < 0 if reply is not requested. 4795 * 4796 * @throws android.content.ActivityNotFoundException 4797 * 4798 * @see Fragment#startActivity 4799 * @see Fragment#startActivityForResult 4800 */ 4801 public void startActivityFromFragment(@NonNull Fragment fragment, 4802 @RequiresPermission Intent intent, int requestCode) { 4803 startActivityFromFragment(fragment, intent, requestCode, null); 4804 } 4805 4806 /** 4807 * This is called when a Fragment in this activity calls its 4808 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 4809 * method. 4810 * 4811 * <p>This method throws {@link android.content.ActivityNotFoundException} 4812 * if there was no Activity found to run the given Intent. 4813 * 4814 * @param fragment The fragment making the call. 4815 * @param intent The intent to start. 4816 * @param requestCode Reply request code. < 0 if reply is not requested. 4817 * @param options Additional options for how the Activity should be started. 4818 * See {@link android.content.Context#startActivity(Intent, Bundle) 4819 * Context.startActivity(Intent, Bundle)} for more details. 4820 * 4821 * @throws android.content.ActivityNotFoundException 4822 * 4823 * @see Fragment#startActivity 4824 * @see Fragment#startActivityForResult 4825 */ 4826 public void startActivityFromFragment(@NonNull Fragment fragment, 4827 @RequiresPermission Intent intent, int requestCode, @Nullable Bundle options) { 4828 startActivityForResult(fragment.mWho, intent, requestCode, options); 4829 } 4830 4831 /** 4832 * @hide 4833 */ 4834 @Override 4835 public void startActivityForResult( 4836 String who, Intent intent, int requestCode, @Nullable Bundle options) { 4837 Uri referrer = onProvideReferrer(); 4838 if (referrer != null) { 4839 intent.putExtra(Intent.EXTRA_REFERRER, referrer); 4840 } 4841 Instrumentation.ActivityResult ar = 4842 mInstrumentation.execStartActivity( 4843 this, mMainThread.getApplicationThread(), mToken, who, 4844 intent, requestCode, options); 4845 if (ar != null) { 4846 mMainThread.sendActivityResult( 4847 mToken, who, requestCode, 4848 ar.getResultCode(), ar.getResultData()); 4849 } 4850 cancelInputsAndStartExitTransition(options); 4851 } 4852 4853 /** 4854 * @hide 4855 */ 4856 @Override 4857 public boolean canStartActivityForResult() { 4858 return true; 4859 } 4860 4861 /** 4862 * Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender, 4863 * int, Intent, int, int, int, Bundle)} with no options. 4864 */ 4865 public void startIntentSenderFromChild(Activity child, IntentSender intent, 4866 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 4867 int extraFlags) 4868 throws IntentSender.SendIntentException { 4869 startIntentSenderFromChild(child, intent, requestCode, fillInIntent, 4870 flagsMask, flagsValues, extraFlags, null); 4871 } 4872 4873 /** 4874 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 4875 * taking a IntentSender; see 4876 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 4877 * for more information. 4878 */ 4879 public void startIntentSenderFromChild(Activity child, IntentSender intent, 4880 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 4881 int extraFlags, @Nullable Bundle options) 4882 throws IntentSender.SendIntentException { 4883 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 4884 flagsMask, flagsValues, child, options); 4885 } 4886 4887 /** 4888 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 4889 * or {@link #finish} to specify an explicit transition animation to 4890 * perform next. 4891 * 4892 * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative 4893 * to using this with starting activities is to supply the desired animation 4894 * information through a {@link ActivityOptions} bundle to 4895 * {@link #startActivity(Intent, Bundle) or a related function. This allows 4896 * you to specify a custom animation even when starting an activity from 4897 * outside the context of the current top activity. 4898 * 4899 * @param enterAnim A resource ID of the animation resource to use for 4900 * the incoming activity. Use 0 for no animation. 4901 * @param exitAnim A resource ID of the animation resource to use for 4902 * the outgoing activity. Use 0 for no animation. 4903 */ 4904 public void overridePendingTransition(int enterAnim, int exitAnim) { 4905 try { 4906 ActivityManagerNative.getDefault().overridePendingTransition( 4907 mToken, getPackageName(), enterAnim, exitAnim); 4908 } catch (RemoteException e) { 4909 } 4910 } 4911 4912 /** 4913 * Call this to set the result that your activity will return to its 4914 * caller. 4915 * 4916 * @param resultCode The result code to propagate back to the originating 4917 * activity, often RESULT_CANCELED or RESULT_OK 4918 * 4919 * @see #RESULT_CANCELED 4920 * @see #RESULT_OK 4921 * @see #RESULT_FIRST_USER 4922 * @see #setResult(int, Intent) 4923 */ 4924 public final void setResult(int resultCode) { 4925 synchronized (this) { 4926 mResultCode = resultCode; 4927 mResultData = null; 4928 } 4929 } 4930 4931 /** 4932 * Call this to set the result that your activity will return to its 4933 * caller. 4934 * 4935 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 4936 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 4937 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 4938 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 4939 * Activity receiving the result access to the specific URIs in the Intent. 4940 * Access will remain until the Activity has finished (it will remain across the hosting 4941 * process being killed and other temporary destruction) and will be added 4942 * to any existing set of URI permissions it already holds. 4943 * 4944 * @param resultCode The result code to propagate back to the originating 4945 * activity, often RESULT_CANCELED or RESULT_OK 4946 * @param data The data to propagate back to the originating activity. 4947 * 4948 * @see #RESULT_CANCELED 4949 * @see #RESULT_OK 4950 * @see #RESULT_FIRST_USER 4951 * @see #setResult(int) 4952 */ 4953 public final void setResult(int resultCode, Intent data) { 4954 synchronized (this) { 4955 mResultCode = resultCode; 4956 mResultData = data; 4957 } 4958 } 4959 4960 /** 4961 * Return information about who launched this activity. If the launching Intent 4962 * contains an {@link android.content.Intent#EXTRA_REFERRER Intent.EXTRA_REFERRER}, 4963 * that will be returned as-is; otherwise, if known, an 4964 * {@link Intent#URI_ANDROID_APP_SCHEME android-app:} referrer URI containing the 4965 * package name that started the Intent will be returned. This may return null if no 4966 * referrer can be identified -- it is neither explicitly specified, nor is it known which 4967 * application package was involved. 4968 * 4969 * <p>If called while inside the handling of {@link #onNewIntent}, this function will 4970 * return the referrer that submitted that new intent to the activity. Otherwise, it 4971 * always returns the referrer of the original Intent.</p> 4972 * 4973 * <p>Note that this is <em>not</em> a security feature -- you can not trust the 4974 * referrer information, applications can spoof it.</p> 4975 */ 4976 @Nullable 4977 public Uri getReferrer() { 4978 Intent intent = getIntent(); 4979 Uri referrer = intent.getParcelableExtra(Intent.EXTRA_REFERRER); 4980 if (referrer != null) { 4981 return referrer; 4982 } 4983 String referrerName = intent.getStringExtra(Intent.EXTRA_REFERRER_NAME); 4984 if (referrerName != null) { 4985 return Uri.parse(referrerName); 4986 } 4987 if (mReferrer != null) { 4988 return new Uri.Builder().scheme("android-app").authority(mReferrer).build(); 4989 } 4990 return null; 4991 } 4992 4993 /** 4994 * Override to generate the desired referrer for the content currently being shown 4995 * by the app. The default implementation returns null, meaning the referrer will simply 4996 * be the android-app: of the package name of this activity. Return a non-null Uri to 4997 * have that supplied as the {@link Intent#EXTRA_REFERRER} of any activities started from it. 4998 */ 4999 public Uri onProvideReferrer() { 5000 return null; 5001 } 5002 5003 /** 5004 * Return the name of the package that invoked this activity. This is who 5005 * the data in {@link #setResult setResult()} will be sent to. You can 5006 * use this information to validate that the recipient is allowed to 5007 * receive the data. 5008 * 5009 * <p class="note">Note: if the calling activity is not expecting a result (that is it 5010 * did not use the {@link #startActivityForResult} 5011 * form that includes a request code), then the calling package will be 5012 * null.</p> 5013 * 5014 * <p class="note">Note: prior to {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, 5015 * the result from this method was unstable. If the process hosting the calling 5016 * package was no longer running, it would return null instead of the proper package 5017 * name. You can use {@link #getCallingActivity()} and retrieve the package name 5018 * from that instead.</p> 5019 * 5020 * @return The package of the activity that will receive your 5021 * reply, or null if none. 5022 */ 5023 @Nullable 5024 public String getCallingPackage() { 5025 try { 5026 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 5027 } catch (RemoteException e) { 5028 return null; 5029 } 5030 } 5031 5032 /** 5033 * Return the name of the activity that invoked this activity. This is 5034 * who the data in {@link #setResult setResult()} will be sent to. You 5035 * can use this information to validate that the recipient is allowed to 5036 * receive the data. 5037 * 5038 * <p class="note">Note: if the calling activity is not expecting a result (that is it 5039 * did not use the {@link #startActivityForResult} 5040 * form that includes a request code), then the calling package will be 5041 * null. 5042 * 5043 * @return The ComponentName of the activity that will receive your 5044 * reply, or null if none. 5045 */ 5046 @Nullable 5047 public ComponentName getCallingActivity() { 5048 try { 5049 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 5050 } catch (RemoteException e) { 5051 return null; 5052 } 5053 } 5054 5055 /** 5056 * Control whether this activity's main window is visible. This is intended 5057 * only for the special case of an activity that is not going to show a 5058 * UI itself, but can't just finish prior to onResume() because it needs 5059 * to wait for a service binding or such. Setting this to false allows 5060 * you to prevent your UI from being shown during that time. 5061 * 5062 * <p>The default value for this is taken from the 5063 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 5064 */ 5065 public void setVisible(boolean visible) { 5066 if (mVisibleFromClient != visible) { 5067 mVisibleFromClient = visible; 5068 if (mVisibleFromServer) { 5069 if (visible) makeVisible(); 5070 else mDecor.setVisibility(View.INVISIBLE); 5071 } 5072 } 5073 } 5074 5075 void makeVisible() { 5076 if (!mWindowAdded) { 5077 ViewManager wm = getWindowManager(); 5078 wm.addView(mDecor, getWindow().getAttributes()); 5079 mWindowAdded = true; 5080 } 5081 mDecor.setVisibility(View.VISIBLE); 5082 } 5083 5084 /** 5085 * Check to see whether this activity is in the process of finishing, 5086 * either because you called {@link #finish} on it or someone else 5087 * has requested that it finished. This is often used in 5088 * {@link #onPause} to determine whether the activity is simply pausing or 5089 * completely finishing. 5090 * 5091 * @return If the activity is finishing, returns true; else returns false. 5092 * 5093 * @see #finish 5094 */ 5095 public boolean isFinishing() { 5096 return mFinished; 5097 } 5098 5099 /** 5100 * Returns true if the final {@link #onDestroy()} call has been made 5101 * on the Activity, so this instance is now dead. 5102 */ 5103 public boolean isDestroyed() { 5104 return mDestroyed; 5105 } 5106 5107 /** 5108 * Check to see whether this activity is in the process of being destroyed in order to be 5109 * recreated with a new configuration. This is often used in 5110 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 5111 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 5112 * 5113 * @return If the activity is being torn down in order to be recreated with a new configuration, 5114 * returns true; else returns false. 5115 */ 5116 public boolean isChangingConfigurations() { 5117 return mChangingConfigurations; 5118 } 5119 5120 /** 5121 * Cause this Activity to be recreated with a new instance. This results 5122 * in essentially the same flow as when the Activity is created due to 5123 * a configuration change -- the current instance will go through its 5124 * lifecycle to {@link #onDestroy} and a new instance then created after it. 5125 */ 5126 public void recreate() { 5127 if (mParent != null) { 5128 throw new IllegalStateException("Can only be called on top-level activity"); 5129 } 5130 if (Looper.myLooper() != mMainThread.getLooper()) { 5131 throw new IllegalStateException("Must be called from main thread"); 5132 } 5133 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, null, false, 5134 false /* preserveWindow */); 5135 } 5136 5137 /** 5138 * Finishes the current activity and specifies whether to remove the task associated with this 5139 * activity. 5140 */ 5141 private void finish(int finishTask) { 5142 if (mParent == null) { 5143 int resultCode; 5144 Intent resultData; 5145 synchronized (this) { 5146 resultCode = mResultCode; 5147 resultData = mResultData; 5148 } 5149 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 5150 try { 5151 if (resultData != null) { 5152 resultData.prepareToLeaveProcess(this); 5153 } 5154 if (ActivityManagerNative.getDefault() 5155 .finishActivity(mToken, resultCode, resultData, finishTask)) { 5156 mFinished = true; 5157 } 5158 } catch (RemoteException e) { 5159 // Empty 5160 } 5161 } else { 5162 mParent.finishFromChild(this); 5163 } 5164 } 5165 5166 /** 5167 * Call this when your activity is done and should be closed. The 5168 * ActivityResult is propagated back to whoever launched you via 5169 * onActivityResult(). 5170 */ 5171 public void finish() { 5172 finish(DONT_FINISH_TASK_WITH_ACTIVITY); 5173 } 5174 5175 /** 5176 * Finish this activity as well as all activities immediately below it 5177 * in the current task that have the same affinity. This is typically 5178 * used when an application can be launched on to another task (such as 5179 * from an ACTION_VIEW of a content type it understands) and the user 5180 * has used the up navigation to switch out of the current task and in 5181 * to its own task. In this case, if the user has navigated down into 5182 * any other activities of the second application, all of those should 5183 * be removed from the original task as part of the task switch. 5184 * 5185 * <p>Note that this finish does <em>not</em> allow you to deliver results 5186 * to the previous activity, and an exception will be thrown if you are trying 5187 * to do so.</p> 5188 */ 5189 public void finishAffinity() { 5190 if (mParent != null) { 5191 throw new IllegalStateException("Can not be called from an embedded activity"); 5192 } 5193 if (mResultCode != RESULT_CANCELED || mResultData != null) { 5194 throw new IllegalStateException("Can not be called to deliver a result"); 5195 } 5196 try { 5197 if (ActivityManagerNative.getDefault().finishActivityAffinity(mToken)) { 5198 mFinished = true; 5199 } 5200 } catch (RemoteException e) { 5201 // Empty 5202 } 5203 } 5204 5205 /** 5206 * This is called when a child activity of this one calls its 5207 * {@link #finish} method. The default implementation simply calls 5208 * finish() on this activity (the parent), finishing the entire group. 5209 * 5210 * @param child The activity making the call. 5211 * 5212 * @see #finish 5213 */ 5214 public void finishFromChild(Activity child) { 5215 finish(); 5216 } 5217 5218 /** 5219 * Reverses the Activity Scene entry Transition and triggers the calling Activity 5220 * to reverse its exit Transition. When the exit Transition completes, 5221 * {@link #finish()} is called. If no entry Transition was used, finish() is called 5222 * immediately and the Activity exit Transition is run. 5223 * @see android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, android.util.Pair[]) 5224 */ 5225 public void finishAfterTransition() { 5226 if (!mActivityTransitionState.startExitBackTransition(this)) { 5227 finish(); 5228 } 5229 } 5230 5231 /** 5232 * Force finish another activity that you had previously started with 5233 * {@link #startActivityForResult}. 5234 * 5235 * @param requestCode The request code of the activity that you had 5236 * given to startActivityForResult(). If there are multiple 5237 * activities started with this request code, they 5238 * will all be finished. 5239 */ 5240 public void finishActivity(int requestCode) { 5241 if (mParent == null) { 5242 try { 5243 ActivityManagerNative.getDefault() 5244 .finishSubActivity(mToken, mEmbeddedID, requestCode); 5245 } catch (RemoteException e) { 5246 // Empty 5247 } 5248 } else { 5249 mParent.finishActivityFromChild(this, requestCode); 5250 } 5251 } 5252 5253 /** 5254 * This is called when a child activity of this one calls its 5255 * finishActivity(). 5256 * 5257 * @param child The activity making the call. 5258 * @param requestCode Request code that had been used to start the 5259 * activity. 5260 */ 5261 public void finishActivityFromChild(@NonNull Activity child, int requestCode) { 5262 try { 5263 ActivityManagerNative.getDefault() 5264 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 5265 } catch (RemoteException e) { 5266 // Empty 5267 } 5268 } 5269 5270 /** 5271 * Call this when your activity is done and should be closed and the task should be completely 5272 * removed as a part of finishing the root activity of the task. 5273 */ 5274 public void finishAndRemoveTask() { 5275 finish(FINISH_TASK_WITH_ROOT_ACTIVITY); 5276 } 5277 5278 /** 5279 * Ask that the local app instance of this activity be released to free up its memory. 5280 * This is asking for the activity to be destroyed, but does <b>not</b> finish the activity -- 5281 * a new instance of the activity will later be re-created if needed due to the user 5282 * navigating back to it. 5283 * 5284 * @return Returns true if the activity was in a state that it has started the process 5285 * of destroying its current instance; returns false if for any reason this could not 5286 * be done: it is currently visible to the user, it is already being destroyed, it is 5287 * being finished, it hasn't yet saved its state, etc. 5288 */ 5289 public boolean releaseInstance() { 5290 try { 5291 return ActivityManagerNative.getDefault().releaseActivityInstance(mToken); 5292 } catch (RemoteException e) { 5293 // Empty 5294 } 5295 return false; 5296 } 5297 5298 /** 5299 * Called when an activity you launched exits, giving you the requestCode 5300 * you started it with, the resultCode it returned, and any additional 5301 * data from it. The <var>resultCode</var> will be 5302 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 5303 * didn't return any result, or crashed during its operation. 5304 * 5305 * <p>You will receive this call immediately before onResume() when your 5306 * activity is re-starting. 5307 * 5308 * <p>This method is never invoked if your activity sets 5309 * {@link android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 5310 * <code>true</code>. 5311 * 5312 * @param requestCode The integer request code originally supplied to 5313 * startActivityForResult(), allowing you to identify who this 5314 * result came from. 5315 * @param resultCode The integer result code returned by the child activity 5316 * through its setResult(). 5317 * @param data An Intent, which can return result data to the caller 5318 * (various data can be attached to Intent "extras"). 5319 * 5320 * @see #startActivityForResult 5321 * @see #createPendingResult 5322 * @see #setResult(int) 5323 */ 5324 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 5325 } 5326 5327 /** 5328 * Called when an activity you launched with an activity transition exposes this 5329 * Activity through a returning activity transition, giving you the resultCode 5330 * and any additional data from it. This method will only be called if the activity 5331 * set a result code other than {@link #RESULT_CANCELED} and it supports activity 5332 * transitions with {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 5333 * 5334 * <p>The purpose of this function is to let the called Activity send a hint about 5335 * its state so that this underlying Activity can prepare to be exposed. A call to 5336 * this method does not guarantee that the called Activity has or will be exiting soon. 5337 * It only indicates that it will expose this Activity's Window and it has 5338 * some data to pass to prepare it.</p> 5339 * 5340 * @param resultCode The integer result code returned by the child activity 5341 * through its setResult(). 5342 * @param data An Intent, which can return result data to the caller 5343 * (various data can be attached to Intent "extras"). 5344 */ 5345 public void onActivityReenter(int resultCode, Intent data) { 5346 } 5347 5348 /** 5349 * Create a new PendingIntent object which you can hand to others 5350 * for them to use to send result data back to your 5351 * {@link #onActivityResult} callback. The created object will be either 5352 * one-shot (becoming invalid after a result is sent back) or multiple 5353 * (allowing any number of results to be sent through it). 5354 * 5355 * @param requestCode Private request code for the sender that will be 5356 * associated with the result data when it is returned. The sender can not 5357 * modify this value, allowing you to identify incoming results. 5358 * @param data Default data to supply in the result, which may be modified 5359 * by the sender. 5360 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 5361 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 5362 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 5363 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 5364 * or any of the flags as supported by 5365 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 5366 * of the intent that can be supplied when the actual send happens. 5367 * 5368 * @return Returns an existing or new PendingIntent matching the given 5369 * parameters. May return null only if 5370 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 5371 * supplied. 5372 * 5373 * @see PendingIntent 5374 */ 5375 public PendingIntent createPendingResult(int requestCode, @NonNull Intent data, 5376 @PendingIntent.Flags int flags) { 5377 String packageName = getPackageName(); 5378 try { 5379 data.prepareToLeaveProcess(this); 5380 IIntentSender target = 5381 ActivityManagerNative.getDefault().getIntentSender( 5382 ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 5383 mParent == null ? mToken : mParent.mToken, 5384 mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null, 5385 UserHandle.myUserId()); 5386 return target != null ? new PendingIntent(target) : null; 5387 } catch (RemoteException e) { 5388 // Empty 5389 } 5390 return null; 5391 } 5392 5393 /** 5394 * Change the desired orientation of this activity. If the activity 5395 * is currently in the foreground or otherwise impacting the screen 5396 * orientation, the screen will immediately be changed (possibly causing 5397 * the activity to be restarted). Otherwise, this will be used the next 5398 * time the activity is visible. 5399 * 5400 * @param requestedOrientation An orientation constant as used in 5401 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 5402 */ 5403 public void setRequestedOrientation(@ActivityInfo.ScreenOrientation int requestedOrientation) { 5404 if (mParent == null) { 5405 try { 5406 ActivityManagerNative.getDefault().setRequestedOrientation( 5407 mToken, requestedOrientation); 5408 } catch (RemoteException e) { 5409 // Empty 5410 } 5411 } else { 5412 mParent.setRequestedOrientation(requestedOrientation); 5413 } 5414 } 5415 5416 /** 5417 * Return the current requested orientation of the activity. This will 5418 * either be the orientation requested in its component's manifest, or 5419 * the last requested orientation given to 5420 * {@link #setRequestedOrientation(int)}. 5421 * 5422 * @return Returns an orientation constant as used in 5423 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 5424 */ 5425 @ActivityInfo.ScreenOrientation 5426 public int getRequestedOrientation() { 5427 if (mParent == null) { 5428 try { 5429 return ActivityManagerNative.getDefault() 5430 .getRequestedOrientation(mToken); 5431 } catch (RemoteException e) { 5432 // Empty 5433 } 5434 } else { 5435 return mParent.getRequestedOrientation(); 5436 } 5437 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 5438 } 5439 5440 /** 5441 * Return the identifier of the task this activity is in. This identifier 5442 * will remain the same for the lifetime of the activity. 5443 * 5444 * @return Task identifier, an opaque integer. 5445 */ 5446 public int getTaskId() { 5447 try { 5448 return ActivityManagerNative.getDefault() 5449 .getTaskForActivity(mToken, false); 5450 } catch (RemoteException e) { 5451 return -1; 5452 } 5453 } 5454 5455 /** 5456 * Return whether this activity is the root of a task. The root is the 5457 * first activity in a task. 5458 * 5459 * @return True if this is the root activity, else false. 5460 */ 5461 public boolean isTaskRoot() { 5462 try { 5463 return ActivityManagerNative.getDefault().getTaskForActivity(mToken, true) >= 0; 5464 } catch (RemoteException e) { 5465 return false; 5466 } 5467 } 5468 5469 /** 5470 * Move the task containing this activity to the back of the activity 5471 * stack. The activity's order within the task is unchanged. 5472 * 5473 * @param nonRoot If false then this only works if the activity is the root 5474 * of a task; if true it will work for any activity in 5475 * a task. 5476 * 5477 * @return If the task was moved (or it was already at the 5478 * back) true is returned, else false. 5479 */ 5480 public boolean moveTaskToBack(boolean nonRoot) { 5481 try { 5482 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 5483 mToken, nonRoot); 5484 } catch (RemoteException e) { 5485 // Empty 5486 } 5487 return false; 5488 } 5489 5490 /** 5491 * Returns class name for this activity with the package prefix removed. 5492 * This is the default name used to read and write settings. 5493 * 5494 * @return The local class name. 5495 */ 5496 @NonNull 5497 public String getLocalClassName() { 5498 final String pkg = getPackageName(); 5499 final String cls = mComponent.getClassName(); 5500 int packageLen = pkg.length(); 5501 if (!cls.startsWith(pkg) || cls.length() <= packageLen 5502 || cls.charAt(packageLen) != '.') { 5503 return cls; 5504 } 5505 return cls.substring(packageLen+1); 5506 } 5507 5508 /** 5509 * Returns complete component name of this activity. 5510 * 5511 * @return Returns the complete component name for this activity 5512 */ 5513 public ComponentName getComponentName() 5514 { 5515 return mComponent; 5516 } 5517 5518 /** 5519 * Retrieve a {@link SharedPreferences} object for accessing preferences 5520 * that are private to this activity. This simply calls the underlying 5521 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 5522 * class name as the preferences name. 5523 * 5524 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 5525 * operation. 5526 * 5527 * @return Returns the single SharedPreferences instance that can be used 5528 * to retrieve and modify the preference values. 5529 */ 5530 public SharedPreferences getPreferences(int mode) { 5531 return getSharedPreferences(getLocalClassName(), mode); 5532 } 5533 5534 private void ensureSearchManager() { 5535 if (mSearchManager != null) { 5536 return; 5537 } 5538 5539 mSearchManager = new SearchManager(this, null); 5540 } 5541 5542 @Override 5543 public Object getSystemService(@ServiceName @NonNull String name) { 5544 if (getBaseContext() == null) { 5545 throw new IllegalStateException( 5546 "System services not available to Activities before onCreate()"); 5547 } 5548 5549 if (WINDOW_SERVICE.equals(name)) { 5550 return mWindowManager; 5551 } else if (SEARCH_SERVICE.equals(name)) { 5552 ensureSearchManager(); 5553 return mSearchManager; 5554 } 5555 return super.getSystemService(name); 5556 } 5557 5558 /** 5559 * Change the title associated with this activity. If this is a 5560 * top-level activity, the title for its window will change. If it 5561 * is an embedded activity, the parent can do whatever it wants 5562 * with it. 5563 */ 5564 public void setTitle(CharSequence title) { 5565 mTitle = title; 5566 onTitleChanged(title, mTitleColor); 5567 5568 if (mParent != null) { 5569 mParent.onChildTitleChanged(this, title); 5570 } 5571 } 5572 5573 /** 5574 * Change the title associated with this activity. If this is a 5575 * top-level activity, the title for its window will change. If it 5576 * is an embedded activity, the parent can do whatever it wants 5577 * with it. 5578 */ 5579 public void setTitle(int titleId) { 5580 setTitle(getText(titleId)); 5581 } 5582 5583 /** 5584 * Change the color of the title associated with this activity. 5585 * <p> 5586 * This method is deprecated starting in API Level 11 and replaced by action 5587 * bar styles. For information on styling the Action Bar, read the <a 5588 * href="{@docRoot} guide/topics/ui/actionbar.html">Action Bar</a> developer 5589 * guide. 5590 * 5591 * @deprecated Use action bar styles instead. 5592 */ 5593 @Deprecated 5594 public void setTitleColor(int textColor) { 5595 mTitleColor = textColor; 5596 onTitleChanged(mTitle, textColor); 5597 } 5598 5599 public final CharSequence getTitle() { 5600 return mTitle; 5601 } 5602 5603 public final int getTitleColor() { 5604 return mTitleColor; 5605 } 5606 5607 protected void onTitleChanged(CharSequence title, int color) { 5608 if (mTitleReady) { 5609 final Window win = getWindow(); 5610 if (win != null) { 5611 win.setTitle(title); 5612 if (color != 0) { 5613 win.setTitleColor(color); 5614 } 5615 } 5616 if (mActionBar != null) { 5617 mActionBar.setWindowTitle(title); 5618 } 5619 } 5620 } 5621 5622 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 5623 } 5624 5625 /** 5626 * Sets information describing the task with this activity for presentation inside the Recents 5627 * System UI. When {@link ActivityManager#getRecentTasks} is called, the activities of each task 5628 * are traversed in order from the topmost activity to the bottommost. The traversal continues 5629 * for each property until a suitable value is found. For each task the taskDescription will be 5630 * returned in {@link android.app.ActivityManager.TaskDescription}. 5631 * 5632 * @see ActivityManager#getRecentTasks 5633 * @see android.app.ActivityManager.TaskDescription 5634 * 5635 * @param taskDescription The TaskDescription properties that describe the task with this activity 5636 */ 5637 public void setTaskDescription(ActivityManager.TaskDescription taskDescription) { 5638 if (mTaskDescription != taskDescription) { 5639 mTaskDescription.copyFrom(taskDescription); 5640 // Scale the icon down to something reasonable if it is provided 5641 if (taskDescription.getIconFilename() == null && taskDescription.getIcon() != null) { 5642 final int size = ActivityManager.getLauncherLargeIconSizeInner(this); 5643 final Bitmap icon = Bitmap.createScaledBitmap(taskDescription.getIcon(), size, size, 5644 true); 5645 mTaskDescription.setIcon(icon); 5646 } 5647 } 5648 try { 5649 ActivityManagerNative.getDefault().setTaskDescription(mToken, mTaskDescription); 5650 } catch (RemoteException e) { 5651 } 5652 } 5653 5654 /** 5655 * Sets the visibility of the progress bar in the title. 5656 * <p> 5657 * In order for the progress bar to be shown, the feature must be requested 5658 * via {@link #requestWindowFeature(int)}. 5659 * 5660 * @param visible Whether to show the progress bars in the title. 5661 * @deprecated No longer supported starting in API 21. 5662 */ 5663 @Deprecated 5664 public final void setProgressBarVisibility(boolean visible) { 5665 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 5666 Window.PROGRESS_VISIBILITY_OFF); 5667 } 5668 5669 /** 5670 * Sets the visibility of the indeterminate progress bar in the title. 5671 * <p> 5672 * In order for the progress bar to be shown, the feature must be requested 5673 * via {@link #requestWindowFeature(int)}. 5674 * 5675 * @param visible Whether to show the progress bars in the title. 5676 * @deprecated No longer supported starting in API 21. 5677 */ 5678 @Deprecated 5679 public final void setProgressBarIndeterminateVisibility(boolean visible) { 5680 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 5681 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 5682 } 5683 5684 /** 5685 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 5686 * is always indeterminate). 5687 * <p> 5688 * In order for the progress bar to be shown, the feature must be requested 5689 * via {@link #requestWindowFeature(int)}. 5690 * 5691 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 5692 * @deprecated No longer supported starting in API 21. 5693 */ 5694 @Deprecated 5695 public final void setProgressBarIndeterminate(boolean indeterminate) { 5696 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 5697 indeterminate ? Window.PROGRESS_INDETERMINATE_ON 5698 : Window.PROGRESS_INDETERMINATE_OFF); 5699 } 5700 5701 /** 5702 * Sets the progress for the progress bars in the title. 5703 * <p> 5704 * In order for the progress bar to be shown, the feature must be requested 5705 * via {@link #requestWindowFeature(int)}. 5706 * 5707 * @param progress The progress for the progress bar. Valid ranges are from 5708 * 0 to 10000 (both inclusive). If 10000 is given, the progress 5709 * bar will be completely filled and will fade out. 5710 * @deprecated No longer supported starting in API 21. 5711 */ 5712 @Deprecated 5713 public final void setProgress(int progress) { 5714 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 5715 } 5716 5717 /** 5718 * Sets the secondary progress for the progress bar in the title. This 5719 * progress is drawn between the primary progress (set via 5720 * {@link #setProgress(int)} and the background. It can be ideal for media 5721 * scenarios such as showing the buffering progress while the default 5722 * progress shows the play progress. 5723 * <p> 5724 * In order for the progress bar to be shown, the feature must be requested 5725 * via {@link #requestWindowFeature(int)}. 5726 * 5727 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 5728 * 0 to 10000 (both inclusive). 5729 * @deprecated No longer supported starting in API 21. 5730 */ 5731 @Deprecated 5732 public final void setSecondaryProgress(int secondaryProgress) { 5733 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 5734 secondaryProgress + Window.PROGRESS_SECONDARY_START); 5735 } 5736 5737 /** 5738 * Suggests an audio stream whose volume should be changed by the hardware 5739 * volume controls. 5740 * <p> 5741 * The suggested audio stream will be tied to the window of this Activity. 5742 * Volume requests which are received while the Activity is in the 5743 * foreground will affect this stream. 5744 * <p> 5745 * It is not guaranteed that the hardware volume controls will always change 5746 * this stream's volume (for example, if a call is in progress, its stream's 5747 * volume may be changed instead). To reset back to the default, use 5748 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 5749 * 5750 * @param streamType The type of the audio stream whose volume should be 5751 * changed by the hardware volume controls. 5752 */ 5753 public final void setVolumeControlStream(int streamType) { 5754 getWindow().setVolumeControlStream(streamType); 5755 } 5756 5757 /** 5758 * Gets the suggested audio stream whose volume should be changed by the 5759 * hardware volume controls. 5760 * 5761 * @return The suggested audio stream type whose volume should be changed by 5762 * the hardware volume controls. 5763 * @see #setVolumeControlStream(int) 5764 */ 5765 public final int getVolumeControlStream() { 5766 return getWindow().getVolumeControlStream(); 5767 } 5768 5769 /** 5770 * Sets a {@link MediaController} to send media keys and volume changes to. 5771 * <p> 5772 * The controller will be tied to the window of this Activity. Media key and 5773 * volume events which are received while the Activity is in the foreground 5774 * will be forwarded to the controller and used to invoke transport controls 5775 * or adjust the volume. This may be used instead of or in addition to 5776 * {@link #setVolumeControlStream} to affect a specific session instead of a 5777 * specific stream. 5778 * <p> 5779 * It is not guaranteed that the hardware volume controls will always change 5780 * this session's volume (for example, if a call is in progress, its 5781 * stream's volume may be changed instead). To reset back to the default use 5782 * null as the controller. 5783 * 5784 * @param controller The controller for the session which should receive 5785 * media keys and volume changes. 5786 */ 5787 public final void setMediaController(MediaController controller) { 5788 getWindow().setMediaController(controller); 5789 } 5790 5791 /** 5792 * Gets the controller which should be receiving media key and volume events 5793 * while this activity is in the foreground. 5794 * 5795 * @return The controller which should receive events. 5796 * @see #setMediaController(android.media.session.MediaController) 5797 */ 5798 public final MediaController getMediaController() { 5799 return getWindow().getMediaController(); 5800 } 5801 5802 /** 5803 * Runs the specified action on the UI thread. If the current thread is the UI 5804 * thread, then the action is executed immediately. If the current thread is 5805 * not the UI thread, the action is posted to the event queue of the UI thread. 5806 * 5807 * @param action the action to run on the UI thread 5808 */ 5809 public final void runOnUiThread(Runnable action) { 5810 if (Thread.currentThread() != mUiThread) { 5811 mHandler.post(action); 5812 } else { 5813 action.run(); 5814 } 5815 } 5816 5817 /** 5818 * Standard implementation of 5819 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 5820 * inflating with the LayoutInflater returned by {@link #getSystemService}. 5821 * This implementation does nothing and is for 5822 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 5823 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 5824 * 5825 * @see android.view.LayoutInflater#createView 5826 * @see android.view.Window#getLayoutInflater 5827 */ 5828 @Nullable 5829 public View onCreateView(String name, Context context, AttributeSet attrs) { 5830 return null; 5831 } 5832 5833 /** 5834 * Standard implementation of 5835 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 5836 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 5837 * This implementation handles <fragment> tags to embed fragments inside 5838 * of the activity. 5839 * 5840 * @see android.view.LayoutInflater#createView 5841 * @see android.view.Window#getLayoutInflater 5842 */ 5843 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 5844 if (!"fragment".equals(name)) { 5845 return onCreateView(name, context, attrs); 5846 } 5847 5848 return mFragments.onCreateView(parent, name, context, attrs); 5849 } 5850 5851 /** 5852 * Print the Activity's state into the given stream. This gets invoked if 5853 * you run "adb shell dumpsys activity <activity_component_name>". 5854 * 5855 * @param prefix Desired prefix to prepend at each line of output. 5856 * @param fd The raw file descriptor that the dump is being sent to. 5857 * @param writer The PrintWriter to which you should dump your state. This will be 5858 * closed for you after you return. 5859 * @param args additional arguments to the dump request. 5860 */ 5861 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 5862 dumpInner(prefix, fd, writer, args); 5863 } 5864 5865 void dumpInner(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 5866 writer.print(prefix); writer.print("Local Activity "); 5867 writer.print(Integer.toHexString(System.identityHashCode(this))); 5868 writer.println(" State:"); 5869 String innerPrefix = prefix + " "; 5870 writer.print(innerPrefix); writer.print("mResumed="); 5871 writer.print(mResumed); writer.print(" mStopped="); 5872 writer.print(mStopped); writer.print(" mFinished="); 5873 writer.println(mFinished); 5874 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 5875 writer.println(mChangingConfigurations); 5876 writer.print(innerPrefix); writer.print("mCurrentConfig="); 5877 writer.println(mCurrentConfig); 5878 5879 mFragments.dumpLoaders(innerPrefix, fd, writer, args); 5880 mFragments.getFragmentManager().dump(innerPrefix, fd, writer, args); 5881 if (mVoiceInteractor != null) { 5882 mVoiceInteractor.dump(innerPrefix, fd, writer, args); 5883 } 5884 5885 if (getWindow() != null && 5886 getWindow().peekDecorView() != null && 5887 getWindow().peekDecorView().getViewRootImpl() != null) { 5888 getWindow().peekDecorView().getViewRootImpl().dump(prefix, fd, writer, args); 5889 } 5890 5891 mHandler.getLooper().dump(new PrintWriterPrinter(writer), prefix); 5892 } 5893 5894 /** 5895 * Bit indicating that this activity is "immersive" and should not be 5896 * interrupted by notifications if possible. 5897 * 5898 * This value is initially set by the manifest property 5899 * <code>android:immersive</code> but may be changed at runtime by 5900 * {@link #setImmersive}. 5901 * 5902 * @see #setImmersive(boolean) 5903 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 5904 */ 5905 public boolean isImmersive() { 5906 try { 5907 return ActivityManagerNative.getDefault().isImmersive(mToken); 5908 } catch (RemoteException e) { 5909 return false; 5910 } 5911 } 5912 5913 /** 5914 * Indication of whether this is the highest level activity in this task. Can be used to 5915 * determine whether an activity launched by this activity was placed in the same task or 5916 * another task. 5917 * 5918 * @return true if this is the topmost, non-finishing activity in its task. 5919 */ 5920 private boolean isTopOfTask() { 5921 try { 5922 return ActivityManagerNative.getDefault().isTopOfTask(mToken); 5923 } catch (RemoteException e) { 5924 return false; 5925 } 5926 } 5927 5928 /** 5929 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} to a 5930 * fullscreen opaque Activity. 5931 * <p> 5932 * Call this whenever the background of a translucent Activity has changed to become opaque. 5933 * Doing so will allow the {@link android.view.Surface} of the Activity behind to be released. 5934 * <p> 5935 * This call has no effect on non-translucent activities or on activities with the 5936 * {@link android.R.attr#windowIsFloating} attribute. 5937 * 5938 * @see #convertToTranslucent(android.app.Activity.TranslucentConversionListener, 5939 * ActivityOptions) 5940 * @see TranslucentConversionListener 5941 * 5942 * @hide 5943 */ 5944 @SystemApi 5945 public void convertFromTranslucent() { 5946 try { 5947 mTranslucentCallback = null; 5948 if (ActivityManagerNative.getDefault().convertFromTranslucent(mToken)) { 5949 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, true); 5950 } 5951 } catch (RemoteException e) { 5952 // pass 5953 } 5954 } 5955 5956 /** 5957 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} back from 5958 * opaque to translucent following a call to {@link #convertFromTranslucent()}. 5959 * <p> 5960 * Calling this allows the Activity behind this one to be seen again. Once all such Activities 5961 * have been redrawn {@link TranslucentConversionListener#onTranslucentConversionComplete} will 5962 * be called indicating that it is safe to make this activity translucent again. Until 5963 * {@link TranslucentConversionListener#onTranslucentConversionComplete} is called the image 5964 * behind the frontmost Activity will be indeterminate. 5965 * <p> 5966 * This call has no effect on non-translucent activities or on activities with the 5967 * {@link android.R.attr#windowIsFloating} attribute. 5968 * 5969 * @param callback the method to call when all visible Activities behind this one have been 5970 * drawn and it is safe to make this Activity translucent again. 5971 * @param options activity options delivered to the activity below this one. The options 5972 * are retrieved using {@link #getActivityOptions}. 5973 * @return <code>true</code> if Window was opaque and will become translucent or 5974 * <code>false</code> if window was translucent and no change needed to be made. 5975 * 5976 * @see #convertFromTranslucent() 5977 * @see TranslucentConversionListener 5978 * 5979 * @hide 5980 */ 5981 @SystemApi 5982 public boolean convertToTranslucent(TranslucentConversionListener callback, 5983 ActivityOptions options) { 5984 boolean drawComplete; 5985 try { 5986 mTranslucentCallback = callback; 5987 mChangeCanvasToTranslucent = 5988 ActivityManagerNative.getDefault().convertToTranslucent(mToken, options); 5989 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 5990 drawComplete = true; 5991 } catch (RemoteException e) { 5992 // Make callback return as though it timed out. 5993 mChangeCanvasToTranslucent = false; 5994 drawComplete = false; 5995 } 5996 if (!mChangeCanvasToTranslucent && mTranslucentCallback != null) { 5997 // Window is already translucent. 5998 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 5999 } 6000 return mChangeCanvasToTranslucent; 6001 } 6002 6003 /** @hide */ 6004 void onTranslucentConversionComplete(boolean drawComplete) { 6005 if (mTranslucentCallback != null) { 6006 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 6007 mTranslucentCallback = null; 6008 } 6009 if (mChangeCanvasToTranslucent) { 6010 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 6011 } 6012 } 6013 6014 /** @hide */ 6015 public void onNewActivityOptions(ActivityOptions options) { 6016 mActivityTransitionState.setEnterActivityOptions(this, options); 6017 if (!mStopped) { 6018 mActivityTransitionState.enterReady(this); 6019 } 6020 } 6021 6022 /** 6023 * Retrieve the ActivityOptions passed in from the launching activity or passed back 6024 * from an activity launched by this activity in its call to {@link 6025 * #convertToTranslucent(TranslucentConversionListener, ActivityOptions)} 6026 * 6027 * @return The ActivityOptions passed to {@link #convertToTranslucent}. 6028 * @hide 6029 */ 6030 ActivityOptions getActivityOptions() { 6031 try { 6032 return ActivityManagerNative.getDefault().getActivityOptions(mToken); 6033 } catch (RemoteException e) { 6034 } 6035 return null; 6036 } 6037 6038 /** 6039 * Activities that want to remain visible behind a translucent activity above them must call 6040 * this method anytime between the start of {@link #onResume()} and the return from 6041 * {@link #onPause()}. If this call is successful then the activity will remain visible after 6042 * {@link #onPause()} is called, and is allowed to continue playing media in the background. 6043 * 6044 * <p>The actions of this call are reset each time that this activity is brought to the 6045 * front. That is, every time {@link #onResume()} is called the activity will be assumed 6046 * to not have requested visible behind. Therefore, if you want this activity to continue to 6047 * be visible in the background you must call this method again. 6048 * 6049 * <p>Only fullscreen opaque activities may make this call. I.e. this call is a nop 6050 * for dialog and translucent activities. 6051 * 6052 * <p>Under all circumstances, the activity must stop playing and release resources prior to or 6053 * within a call to {@link #onVisibleBehindCanceled()} or if this call returns false. 6054 * 6055 * <p>False will be returned any time this method is called between the return of onPause and 6056 * the next call to onResume. 6057 * 6058 * @param visible true to notify the system that the activity wishes to be visible behind other 6059 * translucent activities, false to indicate otherwise. Resources must be 6060 * released when passing false to this method. 6061 * @return the resulting visibiity state. If true the activity will remain visible beyond 6062 * {@link #onPause()} if the next activity is translucent or not fullscreen. If false 6063 * then the activity may not count on being visible behind other translucent activities, 6064 * and must stop any media playback and release resources. 6065 * Returning false may occur in lieu of a call to {@link #onVisibleBehindCanceled()} so 6066 * the return value must be checked. 6067 * 6068 * @see #onVisibleBehindCanceled() 6069 * @see #onBackgroundVisibleBehindChanged(boolean) 6070 */ 6071 public boolean requestVisibleBehind(boolean visible) { 6072 if (!mResumed) { 6073 // Do not permit paused or stopped activities to do this. 6074 visible = false; 6075 } 6076 try { 6077 mVisibleBehind = ActivityManagerNative.getDefault() 6078 .requestVisibleBehind(mToken, visible) && visible; 6079 } catch (RemoteException e) { 6080 mVisibleBehind = false; 6081 } 6082 return mVisibleBehind; 6083 } 6084 6085 /** 6086 * Called when a translucent activity over this activity is becoming opaque or another 6087 * activity is being launched. Activities that override this method must call 6088 * <code>super.onVisibleBehindCanceled()</code> or a SuperNotCalledException will be thrown. 6089 * 6090 * <p>When this method is called the activity has 500 msec to release any resources it may be 6091 * using while visible in the background. 6092 * If the activity has not returned from this method in 500 msec the system will destroy 6093 * the activity and kill the process in order to recover the resources for another 6094 * process. Otherwise {@link #onStop()} will be called following return. 6095 * 6096 * @see #requestVisibleBehind(boolean) 6097 * @see #onBackgroundVisibleBehindChanged(boolean) 6098 */ 6099 @CallSuper 6100 public void onVisibleBehindCanceled() { 6101 mCalled = true; 6102 } 6103 6104 /** 6105 * Translucent activities may call this to determine if there is an activity below them that 6106 * is currently set to be visible in the background. 6107 * 6108 * @return true if an activity below is set to visible according to the most recent call to 6109 * {@link #requestVisibleBehind(boolean)}, false otherwise. 6110 * 6111 * @see #requestVisibleBehind(boolean) 6112 * @see #onVisibleBehindCanceled() 6113 * @see #onBackgroundVisibleBehindChanged(boolean) 6114 * @hide 6115 */ 6116 @SystemApi 6117 public boolean isBackgroundVisibleBehind() { 6118 try { 6119 return ActivityManagerNative.getDefault().isBackgroundVisibleBehind(mToken); 6120 } catch (RemoteException e) { 6121 } 6122 return false; 6123 } 6124 6125 /** 6126 * The topmost foreground activity will receive this call when the background visibility state 6127 * of the activity below it changes. 6128 * 6129 * This call may be a consequence of {@link #requestVisibleBehind(boolean)} or might be 6130 * due to a background activity finishing itself. 6131 * 6132 * @param visible true if a background activity is visible, false otherwise. 6133 * 6134 * @see #requestVisibleBehind(boolean) 6135 * @see #onVisibleBehindCanceled() 6136 * @hide 6137 */ 6138 @SystemApi 6139 public void onBackgroundVisibleBehindChanged(boolean visible) { 6140 } 6141 6142 /** 6143 * Activities cannot draw during the period that their windows are animating in. In order 6144 * to know when it is safe to begin drawing they can override this method which will be 6145 * called when the entering animation has completed. 6146 */ 6147 public void onEnterAnimationComplete() { 6148 } 6149 6150 /** 6151 * @hide 6152 */ 6153 public void dispatchEnterAnimationComplete() { 6154 onEnterAnimationComplete(); 6155 if (getWindow() != null && getWindow().getDecorView() != null) { 6156 getWindow().getDecorView().getViewTreeObserver().dispatchOnEnterAnimationComplete(); 6157 } 6158 } 6159 6160 /** 6161 * Adjust the current immersive mode setting. 6162 * 6163 * Note that changing this value will have no effect on the activity's 6164 * {@link android.content.pm.ActivityInfo} structure; that is, if 6165 * <code>android:immersive</code> is set to <code>true</code> 6166 * in the application's manifest entry for this activity, the {@link 6167 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 6168 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6169 * FLAG_IMMERSIVE} bit set. 6170 * 6171 * @see #isImmersive() 6172 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 6173 */ 6174 public void setImmersive(boolean i) { 6175 try { 6176 ActivityManagerNative.getDefault().setImmersive(mToken, i); 6177 } catch (RemoteException e) { 6178 // pass 6179 } 6180 } 6181 6182 /** 6183 * Enable or disable virtual reality (VR) mode. 6184 * 6185 * <p>VR mode is a hint to Android system services to switch to a mode optimized for 6186 * high-performance stereoscopic rendering. This mode will be enabled while this Activity has 6187 * focus.</p> 6188 * 6189 * @param enabled {@code true} to enable this mode. 6190 * @param requestedComponent the name of the component to use as a 6191 * {@link android.service.vr.VrListenerService} while VR mode is enabled. 6192 * 6193 * @throws android.content.pm.PackageManager.NameNotFoundException; 6194 */ 6195 public void setVrModeEnabled(boolean enabled, @NonNull ComponentName requestedComponent) 6196 throws PackageManager.NameNotFoundException { 6197 try { 6198 if (ActivityManagerNative.getDefault().setVrMode(mToken, enabled, requestedComponent) 6199 != 0) { 6200 throw new PackageManager.NameNotFoundException( 6201 requestedComponent.flattenToString()); 6202 } 6203 } catch (RemoteException e) { 6204 // pass 6205 } 6206 } 6207 6208 /** 6209 * Start an action mode of the default type {@link ActionMode#TYPE_PRIMARY}. 6210 * 6211 * @param callback Callback that will manage lifecycle events for this action mode 6212 * @return The ActionMode that was started, or null if it was canceled 6213 * 6214 * @see ActionMode 6215 */ 6216 @Nullable 6217 public ActionMode startActionMode(ActionMode.Callback callback) { 6218 return mWindow.getDecorView().startActionMode(callback); 6219 } 6220 6221 /** 6222 * Start an action mode of the given type. 6223 * 6224 * @param callback Callback that will manage lifecycle events for this action mode 6225 * @param type One of {@link ActionMode#TYPE_PRIMARY} or {@link ActionMode#TYPE_FLOATING}. 6226 * @return The ActionMode that was started, or null if it was canceled 6227 * 6228 * @see ActionMode 6229 */ 6230 @Nullable 6231 public ActionMode startActionMode(ActionMode.Callback callback, int type) { 6232 return mWindow.getDecorView().startActionMode(callback, type); 6233 } 6234 6235 /** 6236 * Give the Activity a chance to control the UI for an action mode requested 6237 * by the system. 6238 * 6239 * <p>Note: If you are looking for a notification callback that an action mode 6240 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 6241 * 6242 * @param callback The callback that should control the new action mode 6243 * @return The new action mode, or <code>null</code> if the activity does not want to 6244 * provide special handling for this action mode. (It will be handled by the system.) 6245 */ 6246 @Nullable 6247 @Override 6248 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 6249 // Only Primary ActionModes are represented in the ActionBar. 6250 if (mActionModeTypeStarting == ActionMode.TYPE_PRIMARY) { 6251 initWindowDecorActionBar(); 6252 if (mActionBar != null) { 6253 return mActionBar.startActionMode(callback); 6254 } 6255 } 6256 return null; 6257 } 6258 6259 /** 6260 * {@inheritDoc} 6261 */ 6262 @Nullable 6263 @Override 6264 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback, int type) { 6265 try { 6266 mActionModeTypeStarting = type; 6267 return onWindowStartingActionMode(callback); 6268 } finally { 6269 mActionModeTypeStarting = ActionMode.TYPE_PRIMARY; 6270 } 6271 } 6272 6273 /** 6274 * Notifies the Activity that an action mode has been started. 6275 * Activity subclasses overriding this method should call the superclass implementation. 6276 * 6277 * @param mode The new action mode. 6278 */ 6279 @CallSuper 6280 @Override 6281 public void onActionModeStarted(ActionMode mode) { 6282 } 6283 6284 /** 6285 * Notifies the activity that an action mode has finished. 6286 * Activity subclasses overriding this method should call the superclass implementation. 6287 * 6288 * @param mode The action mode that just finished. 6289 */ 6290 @CallSuper 6291 @Override 6292 public void onActionModeFinished(ActionMode mode) { 6293 } 6294 6295 /** 6296 * Returns true if the app should recreate the task when navigating 'up' from this activity 6297 * by using targetIntent. 6298 * 6299 * <p>If this method returns false the app can trivially call 6300 * {@link #navigateUpTo(Intent)} using the same parameters to correctly perform 6301 * up navigation. If this method returns false, the app should synthesize a new task stack 6302 * by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation.</p> 6303 * 6304 * @param targetIntent An intent representing the target destination for up navigation 6305 * @return true if navigating up should recreate a new task stack, false if the same task 6306 * should be used for the destination 6307 */ 6308 public boolean shouldUpRecreateTask(Intent targetIntent) { 6309 try { 6310 PackageManager pm = getPackageManager(); 6311 ComponentName cn = targetIntent.getComponent(); 6312 if (cn == null) { 6313 cn = targetIntent.resolveActivity(pm); 6314 } 6315 ActivityInfo info = pm.getActivityInfo(cn, 0); 6316 if (info.taskAffinity == null) { 6317 return false; 6318 } 6319 return ActivityManagerNative.getDefault() 6320 .shouldUpRecreateTask(mToken, info.taskAffinity); 6321 } catch (RemoteException e) { 6322 return false; 6323 } catch (NameNotFoundException e) { 6324 return false; 6325 } 6326 } 6327 6328 /** 6329 * Navigate from this activity to the activity specified by upIntent, finishing this activity 6330 * in the process. If the activity indicated by upIntent already exists in the task's history, 6331 * this activity and all others before the indicated activity in the history stack will be 6332 * finished. 6333 * 6334 * <p>If the indicated activity does not appear in the history stack, this will finish 6335 * each activity in this task until the root activity of the task is reached, resulting in 6336 * an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy 6337 * when an activity may be reached by a path not passing through a canonical parent 6338 * activity.</p> 6339 * 6340 * <p>This method should be used when performing up navigation from within the same task 6341 * as the destination. If up navigation should cross tasks in some cases, see 6342 * {@link #shouldUpRecreateTask(Intent)}.</p> 6343 * 6344 * @param upIntent An intent representing the target destination for up navigation 6345 * 6346 * @return true if up navigation successfully reached the activity indicated by upIntent and 6347 * upIntent was delivered to it. false if an instance of the indicated activity could 6348 * not be found and this activity was simply finished normally. 6349 */ 6350 public boolean navigateUpTo(Intent upIntent) { 6351 if (mParent == null) { 6352 ComponentName destInfo = upIntent.getComponent(); 6353 if (destInfo == null) { 6354 destInfo = upIntent.resolveActivity(getPackageManager()); 6355 if (destInfo == null) { 6356 return false; 6357 } 6358 upIntent = new Intent(upIntent); 6359 upIntent.setComponent(destInfo); 6360 } 6361 int resultCode; 6362 Intent resultData; 6363 synchronized (this) { 6364 resultCode = mResultCode; 6365 resultData = mResultData; 6366 } 6367 if (resultData != null) { 6368 resultData.prepareToLeaveProcess(this); 6369 } 6370 try { 6371 upIntent.prepareToLeaveProcess(this); 6372 return ActivityManagerNative.getDefault().navigateUpTo(mToken, upIntent, 6373 resultCode, resultData); 6374 } catch (RemoteException e) { 6375 return false; 6376 } 6377 } else { 6378 return mParent.navigateUpToFromChild(this, upIntent); 6379 } 6380 } 6381 6382 /** 6383 * This is called when a child activity of this one calls its 6384 * {@link #navigateUpTo} method. The default implementation simply calls 6385 * navigateUpTo(upIntent) on this activity (the parent). 6386 * 6387 * @param child The activity making the call. 6388 * @param upIntent An intent representing the target destination for up navigation 6389 * 6390 * @return true if up navigation successfully reached the activity indicated by upIntent and 6391 * upIntent was delivered to it. false if an instance of the indicated activity could 6392 * not be found and this activity was simply finished normally. 6393 */ 6394 public boolean navigateUpToFromChild(Activity child, Intent upIntent) { 6395 return navigateUpTo(upIntent); 6396 } 6397 6398 /** 6399 * Obtain an {@link Intent} that will launch an explicit target activity specified by 6400 * this activity's logical parent. The logical parent is named in the application's manifest 6401 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute. 6402 * Activity subclasses may override this method to modify the Intent returned by 6403 * super.getParentActivityIntent() or to implement a different mechanism of retrieving 6404 * the parent intent entirely. 6405 * 6406 * @return a new Intent targeting the defined parent of this activity or null if 6407 * there is no valid parent. 6408 */ 6409 @Nullable 6410 public Intent getParentActivityIntent() { 6411 final String parentName = mActivityInfo.parentActivityName; 6412 if (TextUtils.isEmpty(parentName)) { 6413 return null; 6414 } 6415 6416 // If the parent itself has no parent, generate a main activity intent. 6417 final ComponentName target = new ComponentName(this, parentName); 6418 try { 6419 final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0); 6420 final String parentActivity = parentInfo.parentActivityName; 6421 final Intent parentIntent = parentActivity == null 6422 ? Intent.makeMainActivity(target) 6423 : new Intent().setComponent(target); 6424 return parentIntent; 6425 } catch (NameNotFoundException e) { 6426 Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName + 6427 "' in manifest"); 6428 return null; 6429 } 6430 } 6431 6432 /** 6433 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6434 * android.view.View, String)} was used to start an Activity, <var>callback</var> 6435 * will be called to handle shared elements on the <i>launched</i> Activity. This requires 6436 * {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 6437 * 6438 * @param callback Used to manipulate shared element transitions on the launched Activity. 6439 */ 6440 public void setEnterSharedElementCallback(SharedElementCallback callback) { 6441 if (callback == null) { 6442 callback = SharedElementCallback.NULL_CALLBACK; 6443 } 6444 mEnterTransitionListener = callback; 6445 } 6446 6447 /** 6448 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6449 * android.view.View, String)} was used to start an Activity, <var>callback</var> 6450 * will be called to handle shared elements on the <i>launching</i> Activity. Most 6451 * calls will only come when returning from the started Activity. 6452 * This requires {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 6453 * 6454 * @param callback Used to manipulate shared element transitions on the launching Activity. 6455 */ 6456 public void setExitSharedElementCallback(SharedElementCallback callback) { 6457 if (callback == null) { 6458 callback = SharedElementCallback.NULL_CALLBACK; 6459 } 6460 mExitTransitionListener = callback; 6461 } 6462 6463 /** 6464 * Postpone the entering activity transition when Activity was started with 6465 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6466 * android.util.Pair[])}. 6467 * <p>This method gives the Activity the ability to delay starting the entering and 6468 * shared element transitions until all data is loaded. Until then, the Activity won't 6469 * draw into its window, leaving the window transparent. This may also cause the 6470 * returning animation to be delayed until data is ready. This method should be 6471 * called in {@link #onCreate(android.os.Bundle)} or in 6472 * {@link #onActivityReenter(int, android.content.Intent)}. 6473 * {@link #startPostponedEnterTransition()} must be called to allow the Activity to 6474 * start the transitions. If the Activity did not use 6475 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 6476 * android.util.Pair[])}, then this method does nothing.</p> 6477 */ 6478 public void postponeEnterTransition() { 6479 mActivityTransitionState.postponeEnterTransition(); 6480 } 6481 6482 /** 6483 * Begin postponed transitions after {@link #postponeEnterTransition()} was called. 6484 * If postponeEnterTransition() was called, you must call startPostponedEnterTransition() 6485 * to have your Activity start drawing. 6486 */ 6487 public void startPostponedEnterTransition() { 6488 mActivityTransitionState.startPostponedEnterTransition(); 6489 } 6490 6491 /** 6492 * Create {@link DropPermissions} object bound to this activity and controlling the access 6493 * permissions for content URIs associated with the {@link DragEvent}. 6494 * @param event Drag event 6495 * @return The DropPermissions object used to control access to the content URIs. Null if 6496 * no content URIs are associated with the event or if permissions could not be granted. 6497 */ 6498 public DropPermissions requestDropPermissions(DragEvent event) { 6499 DropPermissions dropPermissions = DropPermissions.obtain(event); 6500 if (dropPermissions != null && dropPermissions.take(getActivityToken())) { 6501 return dropPermissions; 6502 } 6503 return null; 6504 } 6505 6506 // ------------------ Internal API ------------------ 6507 6508 final void setParent(Activity parent) { 6509 mParent = parent; 6510 } 6511 6512 final void attach(Context context, ActivityThread aThread, 6513 Instrumentation instr, IBinder token, int ident, 6514 Application application, Intent intent, ActivityInfo info, 6515 CharSequence title, Activity parent, String id, 6516 NonConfigurationInstances lastNonConfigurationInstances, 6517 Configuration config, String referrer, IVoiceInteractor voiceInteractor, 6518 Window window) { 6519 attachBaseContext(context); 6520 6521 mFragments.attachHost(null /*parent*/); 6522 6523 mWindow = new PhoneWindow(this, window); 6524 mWindow.setWindowControllerCallback(this); 6525 mWindow.setCallback(this); 6526 mWindow.setOnWindowDismissedCallback(this); 6527 mWindow.getLayoutInflater().setPrivateFactory(this); 6528 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 6529 mWindow.setSoftInputMode(info.softInputMode); 6530 } 6531 if (info.uiOptions != 0) { 6532 mWindow.setUiOptions(info.uiOptions); 6533 } 6534 mUiThread = Thread.currentThread(); 6535 6536 mMainThread = aThread; 6537 mInstrumentation = instr; 6538 mToken = token; 6539 mIdent = ident; 6540 mApplication = application; 6541 mIntent = intent; 6542 mReferrer = referrer; 6543 mComponent = intent.getComponent(); 6544 mActivityInfo = info; 6545 mTitle = title; 6546 mParent = parent; 6547 mEmbeddedID = id; 6548 mLastNonConfigurationInstances = lastNonConfigurationInstances; 6549 if (voiceInteractor != null) { 6550 if (lastNonConfigurationInstances != null) { 6551 mVoiceInteractor = lastNonConfigurationInstances.voiceInteractor; 6552 } else { 6553 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 6554 Looper.myLooper()); 6555 } 6556 } 6557 6558 mWindow.setWindowManager( 6559 (WindowManager)context.getSystemService(Context.WINDOW_SERVICE), 6560 mToken, mComponent.flattenToString(), 6561 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 6562 if (mParent != null) { 6563 mWindow.setContainer(mParent.getWindow()); 6564 } 6565 mWindowManager = mWindow.getWindowManager(); 6566 mCurrentConfig = config; 6567 } 6568 6569 /** @hide */ 6570 public final IBinder getActivityToken() { 6571 return mParent != null ? mParent.getActivityToken() : mToken; 6572 } 6573 6574 final void performCreateCommon() { 6575 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 6576 com.android.internal.R.styleable.Window_windowNoDisplay, false); 6577 mFragments.dispatchActivityCreated(); 6578 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6579 } 6580 6581 final void performCreate(Bundle icicle) { 6582 restoreHasCurrentPermissionRequest(icicle); 6583 onCreate(icicle); 6584 mActivityTransitionState.readState(icicle); 6585 performCreateCommon(); 6586 } 6587 6588 final void performCreate(Bundle icicle, PersistableBundle persistentState) { 6589 restoreHasCurrentPermissionRequest(icicle); 6590 onCreate(icicle, persistentState); 6591 mActivityTransitionState.readState(icicle); 6592 performCreateCommon(); 6593 } 6594 6595 final void performStart() { 6596 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6597 mFragments.noteStateNotSaved(); 6598 mCalled = false; 6599 mFragments.execPendingActions(); 6600 mInstrumentation.callActivityOnStart(this); 6601 if (!mCalled) { 6602 throw new SuperNotCalledException( 6603 "Activity " + mComponent.toShortString() + 6604 " did not call through to super.onStart()"); 6605 } 6606 mFragments.dispatchStart(); 6607 mFragments.reportLoaderStart(); 6608 6609 // This property is set for all builds except final release 6610 boolean isDlwarningEnabled = SystemProperties.getInt("ro.bionic.ld.warning", 0) == 1; 6611 boolean isAppDebuggable = 6612 (mApplication.getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0; 6613 6614 if (isAppDebuggable || isDlwarningEnabled) { 6615 String dlwarning = getDlWarning(); 6616 if (dlwarning != null) { 6617 String appName = getApplicationInfo().loadLabel(getPackageManager()) 6618 .toString(); 6619 String warning = "Detected problems with app native libraries\n" + 6620 "(please consult log for detail):\n" + dlwarning; 6621 if (isAppDebuggable) { 6622 new AlertDialog.Builder(this). 6623 setTitle(appName). 6624 setMessage(warning). 6625 setPositiveButton(android.R.string.ok, null). 6626 setCancelable(false). 6627 show(); 6628 } else { 6629 Toast.makeText(this, appName + "\n" + warning, Toast.LENGTH_LONG).show(); 6630 } 6631 } 6632 } 6633 6634 mActivityTransitionState.enterReady(this); 6635 } 6636 6637 final void performRestart() { 6638 mFragments.noteStateNotSaved(); 6639 6640 if (mToken != null && mParent == null) { 6641 // No need to check mStopped, the roots will check if they were actually stopped. 6642 WindowManagerGlobal.getInstance().setStoppedState(mToken, false /* stopped */); 6643 } 6644 6645 if (mStopped) { 6646 mStopped = false; 6647 6648 synchronized (mManagedCursors) { 6649 final int N = mManagedCursors.size(); 6650 for (int i=0; i<N; i++) { 6651 ManagedCursor mc = mManagedCursors.get(i); 6652 if (mc.mReleased || mc.mUpdated) { 6653 if (!mc.mCursor.requery()) { 6654 if (getApplicationInfo().targetSdkVersion 6655 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 6656 throw new IllegalStateException( 6657 "trying to requery an already closed cursor " 6658 + mc.mCursor); 6659 } 6660 } 6661 mc.mReleased = false; 6662 mc.mUpdated = false; 6663 } 6664 } 6665 } 6666 6667 mCalled = false; 6668 mInstrumentation.callActivityOnRestart(this); 6669 if (!mCalled) { 6670 throw new SuperNotCalledException( 6671 "Activity " + mComponent.toShortString() + 6672 " did not call through to super.onRestart()"); 6673 } 6674 performStart(); 6675 } 6676 } 6677 6678 final void performResume() { 6679 performRestart(); 6680 6681 mFragments.execPendingActions(); 6682 6683 mLastNonConfigurationInstances = null; 6684 6685 mCalled = false; 6686 // mResumed is set by the instrumentation 6687 mInstrumentation.callActivityOnResume(this); 6688 if (!mCalled) { 6689 throw new SuperNotCalledException( 6690 "Activity " + mComponent.toShortString() + 6691 " did not call through to super.onResume()"); 6692 } 6693 6694 // invisible activities must be finished before onResume() completes 6695 if (!mVisibleFromClient && !mFinished) { 6696 Log.w(TAG, "An activity without a UI must call finish() before onResume() completes"); 6697 if (getApplicationInfo().targetSdkVersion 6698 > android.os.Build.VERSION_CODES.LOLLIPOP_MR1) { 6699 throw new IllegalStateException( 6700 "Activity " + mComponent.toShortString() + 6701 " did not call finish() prior to onResume() completing"); 6702 } 6703 } 6704 6705 // Now really resume, and install the current status bar and menu. 6706 mCalled = false; 6707 6708 mFragments.dispatchResume(); 6709 mFragments.execPendingActions(); 6710 6711 onPostResume(); 6712 if (!mCalled) { 6713 throw new SuperNotCalledException( 6714 "Activity " + mComponent.toShortString() + 6715 " did not call through to super.onPostResume()"); 6716 } 6717 } 6718 6719 final void performPause() { 6720 mDoReportFullyDrawn = false; 6721 mFragments.dispatchPause(); 6722 mCalled = false; 6723 onPause(); 6724 mResumed = false; 6725 if (!mCalled && getApplicationInfo().targetSdkVersion 6726 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 6727 throw new SuperNotCalledException( 6728 "Activity " + mComponent.toShortString() + 6729 " did not call through to super.onPause()"); 6730 } 6731 mResumed = false; 6732 } 6733 6734 final void performUserLeaving() { 6735 onUserInteraction(); 6736 onUserLeaveHint(); 6737 } 6738 6739 final void performStop(boolean preserveWindow) { 6740 mDoReportFullyDrawn = false; 6741 mFragments.doLoaderStop(mChangingConfigurations /*retain*/); 6742 6743 if (!mStopped) { 6744 if (mWindow != null) { 6745 mWindow.closeAllPanels(); 6746 } 6747 6748 // If we're preserving the window, don't setStoppedState to true, since we 6749 // need the window started immediately again. Stopping the window will 6750 // destroys hardware resources and causes flicker. 6751 if (!preserveWindow && mToken != null && mParent == null) { 6752 WindowManagerGlobal.getInstance().setStoppedState(mToken, true); 6753 } 6754 6755 mFragments.dispatchStop(); 6756 6757 mCalled = false; 6758 mInstrumentation.callActivityOnStop(this); 6759 if (!mCalled) { 6760 throw new SuperNotCalledException( 6761 "Activity " + mComponent.toShortString() + 6762 " did not call through to super.onStop()"); 6763 } 6764 6765 synchronized (mManagedCursors) { 6766 final int N = mManagedCursors.size(); 6767 for (int i=0; i<N; i++) { 6768 ManagedCursor mc = mManagedCursors.get(i); 6769 if (!mc.mReleased) { 6770 mc.mCursor.deactivate(); 6771 mc.mReleased = true; 6772 } 6773 } 6774 } 6775 6776 mStopped = true; 6777 } 6778 mResumed = false; 6779 } 6780 6781 final void performDestroy() { 6782 mDestroyed = true; 6783 mWindow.destroy(); 6784 mFragments.dispatchDestroy(); 6785 onDestroy(); 6786 mFragments.doLoaderDestroy(); 6787 if (mVoiceInteractor != null) { 6788 mVoiceInteractor.detachActivity(); 6789 } 6790 } 6791 6792 /** 6793 * @hide 6794 */ 6795 public final boolean isResumed() { 6796 return mResumed; 6797 } 6798 6799 private void storeHasCurrentPermissionRequest(Bundle bundle) { 6800 if (bundle != null && mHasCurrentPermissionsRequest) { 6801 bundle.putBoolean(HAS_CURENT_PERMISSIONS_REQUEST_KEY, true); 6802 } 6803 } 6804 6805 private void restoreHasCurrentPermissionRequest(Bundle bundle) { 6806 if (bundle != null) { 6807 mHasCurrentPermissionsRequest = bundle.getBoolean( 6808 HAS_CURENT_PERMISSIONS_REQUEST_KEY, false); 6809 } 6810 } 6811 6812 void dispatchActivityResult(String who, int requestCode, 6813 int resultCode, Intent data) { 6814 if (false) Log.v( 6815 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 6816 + ", resCode=" + resultCode + ", data=" + data); 6817 mFragments.noteStateNotSaved(); 6818 if (who == null) { 6819 onActivityResult(requestCode, resultCode, data); 6820 } else if (who.startsWith(REQUEST_PERMISSIONS_WHO_PREFIX)) { 6821 who = who.substring(REQUEST_PERMISSIONS_WHO_PREFIX.length()); 6822 if (TextUtils.isEmpty(who)) { 6823 dispatchRequestPermissionsResult(requestCode, data); 6824 } else { 6825 Fragment frag = mFragments.findFragmentByWho(who); 6826 if (frag != null) { 6827 dispatchRequestPermissionsResultToFragment(requestCode, data, frag); 6828 } 6829 } 6830 } else if (who.startsWith("@android:view:")) { 6831 ArrayList<ViewRootImpl> views = WindowManagerGlobal.getInstance().getRootViews( 6832 getActivityToken()); 6833 for (ViewRootImpl viewRoot : views) { 6834 if (viewRoot.getView() != null 6835 && viewRoot.getView().dispatchActivityResult( 6836 who, requestCode, resultCode, data)) { 6837 return; 6838 } 6839 } 6840 } else { 6841 Fragment frag = mFragments.findFragmentByWho(who); 6842 if (frag != null) { 6843 frag.onActivityResult(requestCode, resultCode, data); 6844 } 6845 } 6846 } 6847 6848 /** 6849 * Request to put this Activity in a mode where the user is locked to the 6850 * current task. 6851 * 6852 * This will prevent the user from launching other apps, going to settings, or reaching the 6853 * home screen. This does not include those apps whose {@link android.R.attr#lockTaskMode} 6854 * values permit launching while locked. 6855 * 6856 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns true or 6857 * lockTaskMode=lockTaskModeAlways for this component then the app will go directly into 6858 * Lock Task mode. The user will not be able to exit this mode until 6859 * {@link Activity#stopLockTask()} is called. 6860 * 6861 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns false 6862 * then the system will prompt the user with a dialog requesting permission to enter 6863 * this mode. When entered through this method the user can exit at any time through 6864 * an action described by the request dialog. Calling stopLockTask will also exit the 6865 * mode. 6866 * 6867 * @see android.R.attr#lockTaskMode 6868 */ 6869 public void startLockTask() { 6870 try { 6871 ActivityManagerNative.getDefault().startLockTaskMode(mToken); 6872 } catch (RemoteException e) { 6873 } 6874 } 6875 6876 /** 6877 * Allow the user to switch away from the current task. 6878 * 6879 * Called to end the mode started by {@link Activity#startLockTask}. This 6880 * can only be called by activities that have successfully called 6881 * startLockTask previously. 6882 * 6883 * This will allow the user to exit this app and move onto other activities. 6884 * <p>Note: This method should only be called when the activity is user-facing. That is, 6885 * between onResume() and onPause(). 6886 * <p>Note: If there are other tasks below this one that are also locked then calling this 6887 * method will immediately finish this task and resume the previous locked one, remaining in 6888 * lockTask mode. 6889 * 6890 * @see android.R.attr#lockTaskMode 6891 * @see ActivityManager#getLockTaskModeState() 6892 */ 6893 public void stopLockTask() { 6894 try { 6895 ActivityManagerNative.getDefault().stopLockTaskMode(); 6896 } catch (RemoteException e) { 6897 } 6898 } 6899 6900 /** 6901 * Shows the user the system defined message for telling the user how to exit 6902 * lock task mode. The task containing this activity must be in lock task mode at the time 6903 * of this call for the message to be displayed. 6904 */ 6905 public void showLockTaskEscapeMessage() { 6906 try { 6907 ActivityManagerNative.getDefault().showLockTaskEscapeMessage(mToken); 6908 } catch (RemoteException e) { 6909 } 6910 } 6911 6912 /** 6913 * Set whether the caption should displayed directly on the content rather than push it down. 6914 * 6915 * This affects only freeform windows since they display the caption and only the main 6916 * window of the activity. The caption is used to drag the window around and also shows 6917 * maximize and close action buttons. 6918 */ 6919 public void overlayWithDecorCaption(boolean overlay) { 6920 mWindow.setOverlayDecorCaption(overlay); 6921 } 6922 6923 /** 6924 * Interface for informing a translucent {@link Activity} once all visible activities below it 6925 * have completed drawing. This is necessary only after an {@link Activity} has been made 6926 * opaque using {@link Activity#convertFromTranslucent()} and before it has been drawn 6927 * translucent again following a call to {@link 6928 * Activity#convertToTranslucent(android.app.Activity.TranslucentConversionListener, 6929 * ActivityOptions)} 6930 * 6931 * @hide 6932 */ 6933 @SystemApi 6934 public interface TranslucentConversionListener { 6935 /** 6936 * Callback made following {@link Activity#convertToTranslucent} once all visible Activities 6937 * below the top one have been redrawn. Following this callback it is safe to make the top 6938 * Activity translucent because the underlying Activity has been drawn. 6939 * 6940 * @param drawComplete True if the background Activity has drawn itself. False if a timeout 6941 * occurred waiting for the Activity to complete drawing. 6942 * 6943 * @see Activity#convertFromTranslucent() 6944 * @see Activity#convertToTranslucent(TranslucentConversionListener, ActivityOptions) 6945 */ 6946 public void onTranslucentConversionComplete(boolean drawComplete); 6947 } 6948 6949 private void dispatchRequestPermissionsResult(int requestCode, Intent data) { 6950 mHasCurrentPermissionsRequest = false; 6951 // If the package installer crashed we may have not data - best effort. 6952 String[] permissions = (data != null) ? data.getStringArrayExtra( 6953 PackageManager.EXTRA_REQUEST_PERMISSIONS_NAMES) : new String[0]; 6954 final int[] grantResults = (data != null) ? data.getIntArrayExtra( 6955 PackageManager.EXTRA_REQUEST_PERMISSIONS_RESULTS) : new int[0]; 6956 onRequestPermissionsResult(requestCode, permissions, grantResults); 6957 } 6958 6959 private void dispatchRequestPermissionsResultToFragment(int requestCode, Intent data, 6960 Fragment fragment) { 6961 // If the package installer crashed we may have not data - best effort. 6962 String[] permissions = (data != null) ? data.getStringArrayExtra( 6963 PackageManager.EXTRA_REQUEST_PERMISSIONS_NAMES) : new String[0]; 6964 final int[] grantResults = (data != null) ? data.getIntArrayExtra( 6965 PackageManager.EXTRA_REQUEST_PERMISSIONS_RESULTS) : new int[0]; 6966 fragment.onRequestPermissionsResult(requestCode, permissions, grantResults); 6967 } 6968 6969 class HostCallbacks extends FragmentHostCallback<Activity> { 6970 public HostCallbacks() { 6971 super(Activity.this /*activity*/); 6972 } 6973 6974 @Override 6975 public void onDump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 6976 Activity.this.dump(prefix, fd, writer, args); 6977 } 6978 6979 @Override 6980 public boolean onShouldSaveFragmentState(Fragment fragment) { 6981 return !isFinishing(); 6982 } 6983 6984 @Override 6985 public LayoutInflater onGetLayoutInflater() { 6986 final LayoutInflater result = Activity.this.getLayoutInflater(); 6987 if (onUseFragmentManagerInflaterFactory()) { 6988 return result.cloneInContext(Activity.this); 6989 } 6990 return result; 6991 } 6992 6993 @Override 6994 public boolean onUseFragmentManagerInflaterFactory() { 6995 // Newer platform versions use the child fragment manager's LayoutInflaterFactory. 6996 return getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.LOLLIPOP; 6997 } 6998 6999 @Override 7000 public Activity onGetHost() { 7001 return Activity.this; 7002 } 7003 7004 @Override 7005 public void onInvalidateOptionsMenu() { 7006 Activity.this.invalidateOptionsMenu(); 7007 } 7008 7009 @Override 7010 public void onStartActivityFromFragment(Fragment fragment, Intent intent, int requestCode, 7011 Bundle options) { 7012 Activity.this.startActivityFromFragment(fragment, intent, requestCode, options); 7013 } 7014 7015 @Override 7016 public void onRequestPermissionsFromFragment(Fragment fragment, String[] permissions, 7017 int requestCode) { 7018 String who = REQUEST_PERMISSIONS_WHO_PREFIX + fragment.mWho; 7019 Intent intent = getPackageManager().buildRequestPermissionsIntent(permissions); 7020 startActivityForResult(who, intent, requestCode, null); 7021 } 7022 7023 @Override 7024 public boolean onHasWindowAnimations() { 7025 return getWindow() != null; 7026 } 7027 7028 @Override 7029 public int onGetWindowAnimations() { 7030 final Window w = getWindow(); 7031 return (w == null) ? 0 : w.getAttributes().windowAnimations; 7032 } 7033 7034 @Override 7035 public void onAttachFragment(Fragment fragment) { 7036 Activity.this.onAttachFragment(fragment); 7037 } 7038 7039 @Nullable 7040 @Override 7041 public View onFindViewById(int id) { 7042 return Activity.this.findViewById(id); 7043 } 7044 7045 @Override 7046 public boolean onHasView() { 7047 final Window w = getWindow(); 7048 return (w != null && w.peekDecorView() != null); 7049 } 7050 } 7051} 7052