Activity.java revision 7a22fc62d364bba4c1604a7e88fbd321eb541f4e
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 android.annotation.NonNull; 20import android.os.PersistableBundle; 21import android.transition.Scene; 22import android.transition.TransitionManager; 23import android.util.ArrayMap; 24import android.util.SuperNotCalledException; 25import android.widget.Toolbar; 26 27import com.android.internal.app.IVoiceInteractor; 28import com.android.internal.app.WindowDecorActionBar; 29import com.android.internal.app.ToolbarActionBar; 30import com.android.internal.policy.PolicyManager; 31 32import android.annotation.IntDef; 33import android.annotation.Nullable; 34import android.annotation.SystemApi; 35import android.app.admin.DevicePolicyManager; 36import android.content.ComponentCallbacks2; 37import android.content.ComponentName; 38import android.content.ContentResolver; 39import android.content.Context; 40import android.content.CursorLoader; 41import android.content.IIntentSender; 42import android.content.Intent; 43import android.content.IntentSender; 44import android.content.SharedPreferences; 45import android.content.pm.ActivityInfo; 46import android.content.pm.PackageManager; 47import android.content.pm.PackageManager.NameNotFoundException; 48import android.content.res.Configuration; 49import android.content.res.Resources; 50import android.content.res.TypedArray; 51import android.database.Cursor; 52import android.graphics.Bitmap; 53import android.graphics.Canvas; 54import android.graphics.drawable.Drawable; 55import android.media.AudioManager; 56import android.media.session.MediaController; 57import android.net.Uri; 58import android.os.Build; 59import android.os.Bundle; 60import android.os.Handler; 61import android.os.IBinder; 62import android.os.Looper; 63import android.os.Parcelable; 64import android.os.RemoteException; 65import android.os.StrictMode; 66import android.os.UserHandle; 67import android.text.Selection; 68import android.text.SpannableStringBuilder; 69import android.text.TextUtils; 70import android.text.method.TextKeyListener; 71import android.util.AttributeSet; 72import android.util.EventLog; 73import android.util.Log; 74import android.util.PrintWriterPrinter; 75import android.util.Slog; 76import android.util.SparseArray; 77import android.view.ActionMode; 78import android.view.ContextMenu; 79import android.view.ContextMenu.ContextMenuInfo; 80import android.view.ContextThemeWrapper; 81import android.view.KeyEvent; 82import android.view.LayoutInflater; 83import android.view.Menu; 84import android.view.MenuInflater; 85import android.view.MenuItem; 86import android.view.MotionEvent; 87import android.view.View; 88import android.view.View.OnCreateContextMenuListener; 89import android.view.ViewGroup; 90import android.view.ViewGroup.LayoutParams; 91import android.view.ViewManager; 92import android.view.Window; 93import android.view.WindowManager; 94import android.view.WindowManagerGlobal; 95import android.view.accessibility.AccessibilityEvent; 96import android.widget.AdapterView; 97 98import java.io.FileDescriptor; 99import java.io.PrintWriter; 100import java.lang.annotation.Retention; 101import java.lang.annotation.RetentionPolicy; 102import java.util.ArrayList; 103import java.util.HashMap; 104 105/** 106 * An activity is a single, focused thing that the user can do. Almost all 107 * activities interact with the user, so the Activity class takes care of 108 * creating a window for you in which you can place your UI with 109 * {@link #setContentView}. While activities are often presented to the user 110 * as full-screen windows, they can also be used in other ways: as floating 111 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 112 * or embedded inside of another activity (using {@link ActivityGroup}). 113 * 114 * There are two methods almost all subclasses of Activity will implement: 115 * 116 * <ul> 117 * <li> {@link #onCreate} is where you initialize your activity. Most 118 * importantly, here you will usually call {@link #setContentView(int)} 119 * with a layout resource defining your UI, and using {@link #findViewById} 120 * to retrieve the widgets in that UI that you need to interact with 121 * programmatically. 122 * 123 * <li> {@link #onPause} is where you deal with the user leaving your 124 * activity. Most importantly, any changes made by the user should at this 125 * point be committed (usually to the 126 * {@link android.content.ContentProvider} holding the data). 127 * </ul> 128 * 129 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 130 * activity classes must have a corresponding 131 * {@link android.R.styleable#AndroidManifestActivity <activity>} 132 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 133 * 134 * <p>Topics covered here: 135 * <ol> 136 * <li><a href="#Fragments">Fragments</a> 137 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 138 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 139 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 140 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 141 * <li><a href="#Permissions">Permissions</a> 142 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 143 * </ol> 144 * 145 * <div class="special reference"> 146 * <h3>Developer Guides</h3> 147 * <p>The Activity class is an important part of an application's overall lifecycle, 148 * and the way activities are launched and put together is a fundamental 149 * part of the platform's application model. For a detailed perspective on the structure of an 150 * Android application and how activities behave, please read the 151 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 152 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 153 * developer guides.</p> 154 * 155 * <p>You can also find a detailed discussion about how to create activities in the 156 * <a href="{@docRoot}guide/topics/fundamentals/activities.html">Activities</a> 157 * developer guide.</p> 158 * </div> 159 * 160 * <a name="Fragments"></a> 161 * <h3>Fragments</h3> 162 * 163 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 164 * implementations can make use of the {@link Fragment} class to better 165 * modularize their code, build more sophisticated user interfaces for larger 166 * screens, and help scale their application between small and large screens. 167 * 168 * <a name="ActivityLifecycle"></a> 169 * <h3>Activity Lifecycle</h3> 170 * 171 * <p>Activities in the system are managed as an <em>activity stack</em>. 172 * When a new activity is started, it is placed on the top of the stack 173 * and becomes the running activity -- the previous activity always remains 174 * below it in the stack, and will not come to the foreground again until 175 * the new activity exits.</p> 176 * 177 * <p>An activity has essentially four states:</p> 178 * <ul> 179 * <li> If an activity in the foreground of the screen (at the top of 180 * the stack), 181 * it is <em>active</em> or <em>running</em>. </li> 182 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 183 * or transparent activity has focus on top of your activity), it 184 * is <em>paused</em>. A paused activity is completely alive (it 185 * maintains all state and member information and remains attached to 186 * the window manager), but can be killed by the system in extreme 187 * low memory situations. 188 * <li>If an activity is completely obscured by another activity, 189 * it is <em>stopped</em>. It still retains all state and member information, 190 * however, it is no longer visible to the user so its window is hidden 191 * and it will often be killed by the system when memory is needed 192 * elsewhere.</li> 193 * <li>If an activity is paused or stopped, the system can drop the activity 194 * from memory by either asking it to finish, or simply killing its 195 * process. When it is displayed again to the user, it must be 196 * completely restarted and restored to its previous state.</li> 197 * </ul> 198 * 199 * <p>The following diagram shows the important state paths of an Activity. 200 * The square rectangles represent callback methods you can implement to 201 * perform operations when the Activity moves between states. The colored 202 * ovals are major states the Activity can be in.</p> 203 * 204 * <p><img src="../../../images/activity_lifecycle.png" 205 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 206 * 207 * <p>There are three key loops you may be interested in monitoring within your 208 * activity: 209 * 210 * <ul> 211 * <li>The <b>entire lifetime</b> of an activity happens between the first call 212 * to {@link android.app.Activity#onCreate} through to a single final call 213 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 214 * of "global" state in onCreate(), and release all remaining resources in 215 * onDestroy(). For example, if it has a thread running in the background 216 * to download data from the network, it may create that thread in onCreate() 217 * and then stop the thread in onDestroy(). 218 * 219 * <li>The <b>visible lifetime</b> of an activity happens between a call to 220 * {@link android.app.Activity#onStart} until a corresponding call to 221 * {@link android.app.Activity#onStop}. During this time the user can see the 222 * activity on-screen, though it may not be in the foreground and interacting 223 * with the user. Between these two methods you can maintain resources that 224 * are needed to show the activity to the user. For example, you can register 225 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 226 * that impact your UI, and unregister it in onStop() when the user no 227 * longer sees what you are displaying. The onStart() and onStop() methods 228 * can be called multiple times, as the activity becomes visible and hidden 229 * to the user. 230 * 231 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 232 * {@link android.app.Activity#onResume} until a corresponding call to 233 * {@link android.app.Activity#onPause}. During this time the activity is 234 * in front of all other activities and interacting with the user. An activity 235 * can frequently go between the resumed and paused states -- for example when 236 * the device goes to sleep, when an activity result is delivered, when a new 237 * intent is delivered -- so the code in these methods should be fairly 238 * lightweight. 239 * </ul> 240 * 241 * <p>The entire lifecycle of an activity is defined by the following 242 * Activity methods. All of these are hooks that you can override 243 * to do appropriate work when the activity changes state. All 244 * activities will implement {@link android.app.Activity#onCreate} 245 * to do their initial setup; many will also implement 246 * {@link android.app.Activity#onPause} to commit changes to data and 247 * otherwise prepare to stop interacting with the user. You should always 248 * call up to your superclass when implementing these methods.</p> 249 * 250 * </p> 251 * <pre class="prettyprint"> 252 * public class Activity extends ApplicationContext { 253 * protected void onCreate(Bundle savedInstanceState); 254 * 255 * protected void onStart(); 256 * 257 * protected void onRestart(); 258 * 259 * protected void onResume(); 260 * 261 * protected void onPause(); 262 * 263 * protected void onStop(); 264 * 265 * protected void onDestroy(); 266 * } 267 * </pre> 268 * 269 * <p>In general the movement through an activity's lifecycle looks like 270 * this:</p> 271 * 272 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 273 * <colgroup align="left" span="3" /> 274 * <colgroup align="left" /> 275 * <colgroup align="center" /> 276 * <colgroup align="center" /> 277 * 278 * <thead> 279 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 280 * </thead> 281 * 282 * <tbody> 283 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 284 * <td>Called when the activity is first created. 285 * This is where you should do all of your normal static set up: 286 * create views, bind data to lists, etc. This method also 287 * provides you with a Bundle containing the activity's previously 288 * frozen state, if there was one. 289 * <p>Always followed by <code>onStart()</code>.</td> 290 * <td align="center">No</td> 291 * <td align="center"><code>onStart()</code></td> 292 * </tr> 293 * 294 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 295 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 296 * <td>Called after your activity has been stopped, prior to it being 297 * started again. 298 * <p>Always followed by <code>onStart()</code></td> 299 * <td align="center">No</td> 300 * <td align="center"><code>onStart()</code></td> 301 * </tr> 302 * 303 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 304 * <td>Called when the activity is becoming visible to the user. 305 * <p>Followed by <code>onResume()</code> if the activity comes 306 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 307 * <td align="center">No</td> 308 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 309 * </tr> 310 * 311 * <tr><td rowspan="2" style="border-left: none;"> </td> 312 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 313 * <td>Called when the activity will start 314 * interacting with the user. At this point your activity is at 315 * the top of the activity stack, with user input going to it. 316 * <p>Always followed by <code>onPause()</code>.</td> 317 * <td align="center">No</td> 318 * <td align="center"><code>onPause()</code></td> 319 * </tr> 320 * 321 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 322 * <td>Called when the system is about to start resuming a previous 323 * activity. This is typically used to commit unsaved changes to 324 * persistent data, stop animations and other things that may be consuming 325 * CPU, etc. Implementations of this method must be very quick because 326 * the next activity will not be resumed until this method returns. 327 * <p>Followed by either <code>onResume()</code> if the activity 328 * returns back to the front, or <code>onStop()</code> if it becomes 329 * invisible to the user.</td> 330 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 331 * <td align="center"><code>onResume()</code> or<br> 332 * <code>onStop()</code></td> 333 * </tr> 334 * 335 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 336 * <td>Called when the activity is no longer visible to the user, because 337 * another activity has been resumed and is covering this one. This 338 * may happen either because a new activity is being started, an existing 339 * one is being brought in front of this one, or this one is being 340 * destroyed. 341 * <p>Followed by either <code>onRestart()</code> if 342 * this activity is coming back to interact with the user, or 343 * <code>onDestroy()</code> if this activity is going away.</td> 344 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 345 * <td align="center"><code>onRestart()</code> or<br> 346 * <code>onDestroy()</code></td> 347 * </tr> 348 * 349 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 350 * <td>The final call you receive before your 351 * activity is destroyed. This can happen either because the 352 * activity is finishing (someone called {@link Activity#finish} on 353 * it, or because the system is temporarily destroying this 354 * instance of the activity to save space. You can distinguish 355 * between these two scenarios with the {@link 356 * Activity#isFinishing} method.</td> 357 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 358 * <td align="center"><em>nothing</em></td> 359 * </tr> 360 * </tbody> 361 * </table> 362 * 363 * <p>Note the "Killable" column in the above table -- for those methods that 364 * are marked as being killable, after that method returns the process hosting the 365 * activity may killed by the system <em>at any time</em> without another line 366 * of its code being executed. Because of this, you should use the 367 * {@link #onPause} method to write any persistent data (such as user edits) 368 * to storage. In addition, the method 369 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 370 * in such a background state, allowing you to save away any dynamic instance 371 * state in your activity into the given Bundle, to be later received in 372 * {@link #onCreate} if the activity needs to be re-created. 373 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 374 * section for more information on how the lifecycle of a process is tied 375 * to the activities it is hosting. Note that it is important to save 376 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 377 * because the latter is not part of the lifecycle callbacks, so will not 378 * be called in every situation as described in its documentation.</p> 379 * 380 * <p class="note">Be aware that these semantics will change slightly between 381 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 382 * vs. those targeting prior platforms. Starting with Honeycomb, an application 383 * is not in the killable state until its {@link #onStop} has returned. This 384 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 385 * safely called after {@link #onPause()} and allows and application to safely 386 * wait until {@link #onStop()} to save persistent state.</p> 387 * 388 * <p>For those methods that are not marked as being killable, the activity's 389 * process will not be killed by the system starting from the time the method 390 * is called and continuing after it returns. Thus an activity is in the killable 391 * state, for example, between after <code>onPause()</code> to the start of 392 * <code>onResume()</code>.</p> 393 * 394 * <a name="ConfigurationChanges"></a> 395 * <h3>Configuration Changes</h3> 396 * 397 * <p>If the configuration of the device (as defined by the 398 * {@link Configuration Resources.Configuration} class) changes, 399 * then anything displaying a user interface will need to update to match that 400 * configuration. Because Activity is the primary mechanism for interacting 401 * with the user, it includes special support for handling configuration 402 * changes.</p> 403 * 404 * <p>Unless you specify otherwise, a configuration change (such as a change 405 * in screen orientation, language, input devices, etc) will cause your 406 * current activity to be <em>destroyed</em>, going through the normal activity 407 * lifecycle process of {@link #onPause}, 408 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 409 * had been in the foreground or visible to the user, once {@link #onDestroy} is 410 * called in that instance then a new instance of the activity will be 411 * created, with whatever savedInstanceState the previous instance had generated 412 * from {@link #onSaveInstanceState}.</p> 413 * 414 * <p>This is done because any application resource, 415 * including layout files, can change based on any configuration value. Thus 416 * the only safe way to handle a configuration change is to re-retrieve all 417 * resources, including layouts, drawables, and strings. Because activities 418 * must already know how to save their state and re-create themselves from 419 * that state, this is a convenient way to have an activity restart itself 420 * with a new configuration.</p> 421 * 422 * <p>In some special cases, you may want to bypass restarting of your 423 * activity based on one or more types of configuration changes. This is 424 * done with the {@link android.R.attr#configChanges android:configChanges} 425 * attribute in its manifest. For any types of configuration changes you say 426 * that you handle there, you will receive a call to your current activity's 427 * {@link #onConfigurationChanged} method instead of being restarted. If 428 * a configuration change involves any that you do not handle, however, the 429 * activity will still be restarted and {@link #onConfigurationChanged} 430 * will not be called.</p> 431 * 432 * <a name="StartingActivities"></a> 433 * <h3>Starting Activities and Getting Results</h3> 434 * 435 * <p>The {@link android.app.Activity#startActivity} 436 * method is used to start a 437 * new activity, which will be placed at the top of the activity stack. It 438 * takes a single argument, an {@link android.content.Intent Intent}, 439 * which describes the activity 440 * to be executed.</p> 441 * 442 * <p>Sometimes you want to get a result back from an activity when it 443 * ends. For example, you may start an activity that lets the user pick 444 * a person in a list of contacts; when it ends, it returns the person 445 * that was selected. To do this, you call the 446 * {@link android.app.Activity#startActivityForResult(Intent, int)} 447 * version with a second integer parameter identifying the call. The result 448 * will come back through your {@link android.app.Activity#onActivityResult} 449 * method.</p> 450 * 451 * <p>When an activity exits, it can call 452 * {@link android.app.Activity#setResult(int)} 453 * to return data back to its parent. It must always supply a result code, 454 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 455 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 456 * return back an Intent containing any additional data it wants. All of this 457 * information appears back on the 458 * parent's <code>Activity.onActivityResult()</code>, along with the integer 459 * identifier it originally supplied.</p> 460 * 461 * <p>If a child activity fails for any reason (such as crashing), the parent 462 * activity will receive a result with the code RESULT_CANCELED.</p> 463 * 464 * <pre class="prettyprint"> 465 * public class MyActivity extends Activity { 466 * ... 467 * 468 * static final int PICK_CONTACT_REQUEST = 0; 469 * 470 * public boolean onKeyDown(int keyCode, KeyEvent event) { 471 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 472 * // When the user center presses, let them pick a contact. 473 * startActivityForResult( 474 * new Intent(Intent.ACTION_PICK, 475 * new Uri("content://contacts")), 476 * PICK_CONTACT_REQUEST); 477 * return true; 478 * } 479 * return false; 480 * } 481 * 482 * protected void onActivityResult(int requestCode, int resultCode, 483 * Intent data) { 484 * if (requestCode == PICK_CONTACT_REQUEST) { 485 * if (resultCode == RESULT_OK) { 486 * // A contact was picked. Here we will just display it 487 * // to the user. 488 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 489 * } 490 * } 491 * } 492 * } 493 * </pre> 494 * 495 * <a name="SavingPersistentState"></a> 496 * <h3>Saving Persistent State</h3> 497 * 498 * <p>There are generally two kinds of persistent state than an activity 499 * will deal with: shared document-like data (typically stored in a SQLite 500 * database using a {@linkplain android.content.ContentProvider content provider}) 501 * and internal state such as user preferences.</p> 502 * 503 * <p>For content provider data, we suggest that activities use a 504 * "edit in place" user model. That is, any edits a user makes are effectively 505 * made immediately without requiring an additional confirmation step. 506 * Supporting this model is generally a simple matter of following two rules:</p> 507 * 508 * <ul> 509 * <li> <p>When creating a new document, the backing database entry or file for 510 * it is created immediately. For example, if the user chooses to write 511 * a new e-mail, a new entry for that e-mail is created as soon as they 512 * start entering data, so that if they go to any other activity after 513 * that point this e-mail will now appear in the list of drafts.</p> 514 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 515 * commit to the backing content provider or file any changes the user 516 * has made. This ensures that those changes will be seen by any other 517 * activity that is about to run. You will probably want to commit 518 * your data even more aggressively at key times during your 519 * activity's lifecycle: for example before starting a new 520 * activity, before finishing your own activity, when the user 521 * switches between input fields, etc.</p> 522 * </ul> 523 * 524 * <p>This model is designed to prevent data loss when a user is navigating 525 * between activities, and allows the system to safely kill an activity (because 526 * system resources are needed somewhere else) at any time after it has been 527 * paused. Note this implies 528 * that the user pressing BACK from your activity does <em>not</em> 529 * mean "cancel" -- it means to leave the activity with its current contents 530 * saved away. Canceling edits in an activity must be provided through 531 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 532 * 533 * <p>See the {@linkplain android.content.ContentProvider content package} for 534 * more information about content providers. These are a key aspect of how 535 * different activities invoke and propagate data between themselves.</p> 536 * 537 * <p>The Activity class also provides an API for managing internal persistent state 538 * associated with an activity. This can be used, for example, to remember 539 * the user's preferred initial display in a calendar (day view or week view) 540 * or the user's default home page in a web browser.</p> 541 * 542 * <p>Activity persistent state is managed 543 * with the method {@link #getPreferences}, 544 * allowing you to retrieve and 545 * modify a set of name/value pairs associated with the activity. To use 546 * preferences that are shared across multiple application components 547 * (activities, receivers, services, providers), you can use the underlying 548 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 549 * to retrieve a preferences 550 * object stored under a specific name. 551 * (Note that it is not possible to share settings data across application 552 * packages -- for that you will need a content provider.)</p> 553 * 554 * <p>Here is an excerpt from a calendar activity that stores the user's 555 * preferred view mode in its persistent settings:</p> 556 * 557 * <pre class="prettyprint"> 558 * public class CalendarActivity extends Activity { 559 * ... 560 * 561 * static final int DAY_VIEW_MODE = 0; 562 * static final int WEEK_VIEW_MODE = 1; 563 * 564 * private SharedPreferences mPrefs; 565 * private int mCurViewMode; 566 * 567 * protected void onCreate(Bundle savedInstanceState) { 568 * super.onCreate(savedInstanceState); 569 * 570 * SharedPreferences mPrefs = getSharedPreferences(); 571 * mCurViewMode = mPrefs.getInt("view_mode", DAY_VIEW_MODE); 572 * } 573 * 574 * protected void onPause() { 575 * super.onPause(); 576 * 577 * SharedPreferences.Editor ed = mPrefs.edit(); 578 * ed.putInt("view_mode", mCurViewMode); 579 * ed.commit(); 580 * } 581 * } 582 * </pre> 583 * 584 * <a name="Permissions"></a> 585 * <h3>Permissions</h3> 586 * 587 * <p>The ability to start a particular Activity can be enforced when it is 588 * declared in its 589 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 590 * tag. By doing so, other applications will need to declare a corresponding 591 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 592 * element in their own manifest to be able to start that activity. 593 * 594 * <p>When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 595 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 596 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the 597 * Activity access to the specific URIs in the Intent. Access will remain 598 * until the Activity has finished (it will remain across the hosting 599 * process being killed and other temporary destruction). As of 600 * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity 601 * was already created and a new Intent is being delivered to 602 * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added 603 * to the existing ones it holds. 604 * 605 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 606 * document for more information on permissions and security in general. 607 * 608 * <a name="ProcessLifecycle"></a> 609 * <h3>Process Lifecycle</h3> 610 * 611 * <p>The Android system attempts to keep application process around for as 612 * long as possible, but eventually will need to remove old processes when 613 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 614 * Lifecycle</a>, the decision about which process to remove is intimately 615 * tied to the state of the user's interaction with it. In general, there 616 * are four states a process can be in based on the activities running in it, 617 * listed here in order of importance. The system will kill less important 618 * processes (the last ones) before it resorts to killing more important 619 * processes (the first ones). 620 * 621 * <ol> 622 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 623 * that the user is currently interacting with) is considered the most important. 624 * Its process will only be killed as a last resort, if it uses more memory 625 * than is available on the device. Generally at this point the device has 626 * reached a memory paging state, so this is required in order to keep the user 627 * interface responsive. 628 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 629 * but not in the foreground, such as one sitting behind a foreground dialog) 630 * is considered extremely important and will not be killed unless that is 631 * required to keep the foreground activity running. 632 * <li> <p>A <b>background activity</b> (an activity that is not visible to 633 * the user and has been paused) is no longer critical, so the system may 634 * safely kill its process to reclaim memory for other foreground or 635 * visible processes. If its process needs to be killed, when the user navigates 636 * back to the activity (making it visible on the screen again), its 637 * {@link #onCreate} method will be called with the savedInstanceState it had previously 638 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 639 * state as the user last left it. 640 * <li> <p>An <b>empty process</b> is one hosting no activities or other 641 * application components (such as {@link Service} or 642 * {@link android.content.BroadcastReceiver} classes). These are killed very 643 * quickly by the system as memory becomes low. For this reason, any 644 * background operation you do outside of an activity must be executed in the 645 * context of an activity BroadcastReceiver or Service to ensure that the system 646 * knows it needs to keep your process around. 647 * </ol> 648 * 649 * <p>Sometimes an Activity may need to do a long-running operation that exists 650 * independently of the activity lifecycle itself. An example may be a camera 651 * application that allows you to upload a picture to a web site. The upload 652 * may take a long time, and the application should allow the user to leave 653 * the application will it is executing. To accomplish this, your Activity 654 * should start a {@link Service} in which the upload takes place. This allows 655 * the system to properly prioritize your process (considering it to be more 656 * important than other non-visible applications) for the duration of the 657 * upload, independent of whether the original activity is paused, stopped, 658 * or finished. 659 */ 660public class Activity extends ContextThemeWrapper 661 implements LayoutInflater.Factory2, 662 Window.Callback, KeyEvent.Callback, 663 OnCreateContextMenuListener, ComponentCallbacks2, 664 Window.OnWindowDismissedCallback { 665 private static final String TAG = "Activity"; 666 private static final boolean DEBUG_LIFECYCLE = false; 667 668 /** Standard activity result: operation canceled. */ 669 public static final int RESULT_CANCELED = 0; 670 /** Standard activity result: operation succeeded. */ 671 public static final int RESULT_OK = -1; 672 /** Start of user-defined activity results. */ 673 public static final int RESULT_FIRST_USER = 1; 674 675 static final String FRAGMENTS_TAG = "android:fragments"; 676 677 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 678 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 679 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 680 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 681 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 682 683 private static class ManagedDialog { 684 Dialog mDialog; 685 Bundle mArgs; 686 } 687 private SparseArray<ManagedDialog> mManagedDialogs; 688 689 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 690 private Instrumentation mInstrumentation; 691 private IBinder mToken; 692 private int mIdent; 693 /*package*/ String mEmbeddedID; 694 private Application mApplication; 695 /*package*/ Intent mIntent; 696 /*package*/ String mReferrer; 697 private ComponentName mComponent; 698 /*package*/ ActivityInfo mActivityInfo; 699 /*package*/ ActivityThread mMainThread; 700 Activity mParent; 701 boolean mCalled; 702 boolean mCheckedForLoaderManager; 703 boolean mLoadersStarted; 704 /*package*/ boolean mResumed; 705 private boolean mStopped; 706 boolean mFinished; 707 boolean mStartedActivity; 708 private boolean mDestroyed; 709 private boolean mDoReportFullyDrawn = true; 710 /** true if the activity is going through a transient pause */ 711 /*package*/ boolean mTemporaryPause = false; 712 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 713 /*package*/ boolean mChangingConfigurations = false; 714 /*package*/ int mConfigChangeFlags; 715 /*package*/ Configuration mCurrentConfig; 716 private SearchManager mSearchManager; 717 private MenuInflater mMenuInflater; 718 719 static final class NonConfigurationInstances { 720 Object activity; 721 HashMap<String, Object> children; 722 ArrayList<Fragment> fragments; 723 ArrayMap<String, LoaderManagerImpl> loaders; 724 VoiceInteractor voiceInteractor; 725 } 726 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 727 728 private Window mWindow; 729 730 private WindowManager mWindowManager; 731 /*package*/ View mDecor = null; 732 /*package*/ boolean mWindowAdded = false; 733 /*package*/ boolean mVisibleFromServer = false; 734 /*package*/ boolean mVisibleFromClient = true; 735 /*package*/ ActionBar mActionBar = null; 736 private boolean mEnableDefaultActionBarUp; 737 738 private VoiceInteractor mVoiceInteractor; 739 740 private CharSequence mTitle; 741 private int mTitleColor = 0; 742 743 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 744 final FragmentContainer mContainer = new FragmentContainer() { 745 @Override 746 public View findViewById(int id) { 747 return Activity.this.findViewById(id); 748 } 749 @Override 750 public boolean hasView() { 751 Window window = Activity.this.getWindow(); 752 return (window != null && window.peekDecorView() != null); 753 } 754 }; 755 756 // Most recent call to requestVisibleBehind(). 757 boolean mVisibleBehind; 758 759 ArrayMap<String, LoaderManagerImpl> mAllLoaderManagers; 760 LoaderManagerImpl mLoaderManager; 761 762 private static final class ManagedCursor { 763 ManagedCursor(Cursor cursor) { 764 mCursor = cursor; 765 mReleased = false; 766 mUpdated = false; 767 } 768 769 private final Cursor mCursor; 770 private boolean mReleased; 771 private boolean mUpdated; 772 } 773 private final ArrayList<ManagedCursor> mManagedCursors = 774 new ArrayList<ManagedCursor>(); 775 776 // protected by synchronized (this) 777 int mResultCode = RESULT_CANCELED; 778 Intent mResultData = null; 779 780 private TranslucentConversionListener mTranslucentCallback; 781 private boolean mChangeCanvasToTranslucent; 782 783 private boolean mTitleReady = false; 784 785 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 786 private SpannableStringBuilder mDefaultKeySsb = null; 787 788 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 789 790 @SuppressWarnings("unused") 791 private final Object mInstanceTracker = StrictMode.trackActivity(this); 792 793 private Thread mUiThread; 794 final Handler mHandler = new Handler(); 795 796 ActivityTransitionState mActivityTransitionState = new ActivityTransitionState(); 797 SharedElementCallback mEnterTransitionListener = SharedElementCallback.NULL_CALLBACK; 798 SharedElementCallback mExitTransitionListener = SharedElementCallback.NULL_CALLBACK; 799 800 /** Return the intent that started this activity. */ 801 public Intent getIntent() { 802 return mIntent; 803 } 804 805 /** 806 * Change the intent returned by {@link #getIntent}. This holds a 807 * reference to the given intent; it does not copy it. Often used in 808 * conjunction with {@link #onNewIntent}. 809 * 810 * @param newIntent The new Intent object to return from getIntent 811 * 812 * @see #getIntent 813 * @see #onNewIntent 814 */ 815 public void setIntent(Intent newIntent) { 816 mIntent = newIntent; 817 } 818 819 /** Return the application that owns this activity. */ 820 public final Application getApplication() { 821 return mApplication; 822 } 823 824 /** Is this activity embedded inside of another activity? */ 825 public final boolean isChild() { 826 return mParent != null; 827 } 828 829 /** Return the parent activity if this view is an embedded child. */ 830 public final Activity getParent() { 831 return mParent; 832 } 833 834 /** Retrieve the window manager for showing custom windows. */ 835 public WindowManager getWindowManager() { 836 return mWindowManager; 837 } 838 839 /** 840 * Retrieve the current {@link android.view.Window} for the activity. 841 * This can be used to directly access parts of the Window API that 842 * are not available through Activity/Screen. 843 * 844 * @return Window The current window, or null if the activity is not 845 * visual. 846 */ 847 public Window getWindow() { 848 return mWindow; 849 } 850 851 /** 852 * Return the LoaderManager for this activity, creating it if needed. 853 */ 854 public LoaderManager getLoaderManager() { 855 if (mLoaderManager != null) { 856 return mLoaderManager; 857 } 858 mCheckedForLoaderManager = true; 859 mLoaderManager = getLoaderManager("(root)", mLoadersStarted, true); 860 return mLoaderManager; 861 } 862 863 LoaderManagerImpl getLoaderManager(String who, boolean started, boolean create) { 864 if (mAllLoaderManagers == null) { 865 mAllLoaderManagers = new ArrayMap<String, LoaderManagerImpl>(); 866 } 867 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 868 if (lm == null) { 869 if (create) { 870 lm = new LoaderManagerImpl(who, this, started); 871 mAllLoaderManagers.put(who, lm); 872 } 873 } else { 874 lm.updateActivity(this); 875 } 876 return lm; 877 } 878 879 /** 880 * Calls {@link android.view.Window#getCurrentFocus} on the 881 * Window of this Activity to return the currently focused view. 882 * 883 * @return View The current View with focus or null. 884 * 885 * @see #getWindow 886 * @see android.view.Window#getCurrentFocus 887 */ 888 @Nullable 889 public View getCurrentFocus() { 890 return mWindow != null ? mWindow.getCurrentFocus() : null; 891 } 892 893 /** 894 * Called when the activity is starting. This is where most initialization 895 * should go: calling {@link #setContentView(int)} to inflate the 896 * activity's UI, using {@link #findViewById} to programmatically interact 897 * with widgets in the UI, calling 898 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 899 * cursors for data being displayed, etc. 900 * 901 * <p>You can call {@link #finish} from within this function, in 902 * which case onDestroy() will be immediately called without any of the rest 903 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 904 * {@link #onPause}, etc) executing. 905 * 906 * <p><em>Derived classes must call through to the super class's 907 * implementation of this method. If they do not, an exception will be 908 * thrown.</em></p> 909 * 910 * @param savedInstanceState If the activity is being re-initialized after 911 * previously being shut down then this Bundle contains the data it most 912 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 913 * 914 * @see #onStart 915 * @see #onSaveInstanceState 916 * @see #onRestoreInstanceState 917 * @see #onPostCreate 918 */ 919 protected void onCreate(@Nullable Bundle savedInstanceState) { 920 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState); 921 if (mLastNonConfigurationInstances != null) { 922 mAllLoaderManagers = mLastNonConfigurationInstances.loaders; 923 } 924 if (mActivityInfo.parentActivityName != null) { 925 if (mActionBar == null) { 926 mEnableDefaultActionBarUp = true; 927 } else { 928 mActionBar.setDefaultDisplayHomeAsUpEnabled(true); 929 } 930 } 931 if (savedInstanceState != null) { 932 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 933 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 934 ? mLastNonConfigurationInstances.fragments : null); 935 } 936 mFragments.dispatchCreate(); 937 getApplication().dispatchActivityCreated(this, savedInstanceState); 938 if (mVoiceInteractor != null) { 939 mVoiceInteractor.attachActivity(this); 940 } 941 mCalled = true; 942 } 943 944 /** 945 * Same as {@link #onCreate(android.os.Bundle)} but called for those activities created with 946 * the attribute {@link android.R.attr#persistableMode} set to 947 * <code>persistAcrossReboots</code>. 948 * 949 * @param savedInstanceState if the activity is being re-initialized after 950 * previously being shut down then this Bundle contains the data it most 951 * recently supplied in {@link #onSaveInstanceState}. 952 * <b><i>Note: Otherwise it is null.</i></b> 953 * @param persistentState if the activity is being re-initialized after 954 * previously being shut down or powered off then this Bundle contains the data it most 955 * recently supplied to outPersistentState in {@link #onSaveInstanceState}. 956 * <b><i>Note: Otherwise it is null.</i></b> 957 * 958 * @see #onCreate(android.os.Bundle) 959 * @see #onStart 960 * @see #onSaveInstanceState 961 * @see #onRestoreInstanceState 962 * @see #onPostCreate 963 */ 964 public void onCreate(@Nullable Bundle savedInstanceState, 965 @Nullable PersistableBundle persistentState) { 966 onCreate(savedInstanceState); 967 } 968 969 /** 970 * The hook for {@link ActivityThread} to restore the state of this activity. 971 * 972 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 973 * {@link #restoreManagedDialogs(android.os.Bundle)}. 974 * 975 * @param savedInstanceState contains the saved state 976 */ 977 final void performRestoreInstanceState(Bundle savedInstanceState) { 978 onRestoreInstanceState(savedInstanceState); 979 restoreManagedDialogs(savedInstanceState); 980 } 981 982 /** 983 * The hook for {@link ActivityThread} to restore the state of this activity. 984 * 985 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 986 * {@link #restoreManagedDialogs(android.os.Bundle)}. 987 * 988 * @param savedInstanceState contains the saved state 989 * @param persistentState contains the persistable saved state 990 */ 991 final void performRestoreInstanceState(Bundle savedInstanceState, 992 PersistableBundle persistentState) { 993 onRestoreInstanceState(savedInstanceState, persistentState); 994 if (savedInstanceState != null) { 995 restoreManagedDialogs(savedInstanceState); 996 } 997 } 998 999 /** 1000 * This method is called after {@link #onStart} when the activity is 1001 * being re-initialized from a previously saved state, given here in 1002 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 1003 * to restore their state, but it is sometimes convenient to do it here 1004 * after all of the initialization has been done or to allow subclasses to 1005 * decide whether to use your default implementation. The default 1006 * implementation of this method performs a restore of any view state that 1007 * had previously been frozen by {@link #onSaveInstanceState}. 1008 * 1009 * <p>This method is called between {@link #onStart} and 1010 * {@link #onPostCreate}. 1011 * 1012 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1013 * 1014 * @see #onCreate 1015 * @see #onPostCreate 1016 * @see #onResume 1017 * @see #onSaveInstanceState 1018 */ 1019 protected void onRestoreInstanceState(Bundle savedInstanceState) { 1020 if (mWindow != null) { 1021 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 1022 if (windowState != null) { 1023 mWindow.restoreHierarchyState(windowState); 1024 } 1025 } 1026 } 1027 1028 /** 1029 * This is the same as {@link #onRestoreInstanceState(Bundle)} but is called for activities 1030 * created with the attribute {@link android.R.attr#persistableMode} set to 1031 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1032 * came from the restored PersistableBundle first 1033 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1034 * 1035 * <p>This method is called between {@link #onStart} and 1036 * {@link #onPostCreate}. 1037 * 1038 * <p>If this method is called {@link #onRestoreInstanceState(Bundle)} will not be called. 1039 * 1040 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 1041 * @param persistentState the data most recently supplied in {@link #onSaveInstanceState}. 1042 * 1043 * @see #onRestoreInstanceState(Bundle) 1044 * @see #onCreate 1045 * @see #onPostCreate 1046 * @see #onResume 1047 * @see #onSaveInstanceState 1048 */ 1049 public void onRestoreInstanceState(Bundle savedInstanceState, 1050 PersistableBundle persistentState) { 1051 if (savedInstanceState != null) { 1052 onRestoreInstanceState(savedInstanceState); 1053 } 1054 } 1055 1056 /** 1057 * Restore the state of any saved managed dialogs. 1058 * 1059 * @param savedInstanceState The bundle to restore from. 1060 */ 1061 private void restoreManagedDialogs(Bundle savedInstanceState) { 1062 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 1063 if (b == null) { 1064 return; 1065 } 1066 1067 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 1068 final int numDialogs = ids.length; 1069 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 1070 for (int i = 0; i < numDialogs; i++) { 1071 final Integer dialogId = ids[i]; 1072 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 1073 if (dialogState != null) { 1074 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 1075 // so tell createDialog() not to do it, otherwise we get an exception 1076 final ManagedDialog md = new ManagedDialog(); 1077 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 1078 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 1079 if (md.mDialog != null) { 1080 mManagedDialogs.put(dialogId, md); 1081 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 1082 md.mDialog.onRestoreInstanceState(dialogState); 1083 } 1084 } 1085 } 1086 } 1087 1088 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 1089 final Dialog dialog = onCreateDialog(dialogId, args); 1090 if (dialog == null) { 1091 return null; 1092 } 1093 dialog.dispatchOnCreate(state); 1094 return dialog; 1095 } 1096 1097 private static String savedDialogKeyFor(int key) { 1098 return SAVED_DIALOG_KEY_PREFIX + key; 1099 } 1100 1101 private static String savedDialogArgsKeyFor(int key) { 1102 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 1103 } 1104 1105 /** 1106 * Called when activity start-up is complete (after {@link #onStart} 1107 * and {@link #onRestoreInstanceState} have been called). Applications will 1108 * generally not implement this method; it is intended for system 1109 * classes to do final initialization after application code has run. 1110 * 1111 * <p><em>Derived classes must call through to the super class's 1112 * implementation of this method. If they do not, an exception will be 1113 * thrown.</em></p> 1114 * 1115 * @param savedInstanceState If the activity is being re-initialized after 1116 * previously being shut down then this Bundle contains the data it most 1117 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1118 * @see #onCreate 1119 */ 1120 protected void onPostCreate(@Nullable Bundle savedInstanceState) { 1121 if (!isChild()) { 1122 mTitleReady = true; 1123 onTitleChanged(getTitle(), getTitleColor()); 1124 } 1125 mCalled = true; 1126 } 1127 1128 /** 1129 * This is the same as {@link #onPostCreate(Bundle)} but is called for activities 1130 * created with the attribute {@link android.R.attr#persistableMode} set to 1131 * <code>persistAcrossReboots</code>. 1132 * 1133 * @param savedInstanceState The data most recently supplied in {@link #onSaveInstanceState} 1134 * @param persistentState The data caming from the PersistableBundle first 1135 * saved in {@link #onSaveInstanceState(Bundle, PersistableBundle)}. 1136 * 1137 * @see #onCreate 1138 */ 1139 public void onPostCreate(@Nullable Bundle savedInstanceState, 1140 @Nullable PersistableBundle persistentState) { 1141 onPostCreate(savedInstanceState); 1142 } 1143 1144 /** 1145 * Called after {@link #onCreate} — or after {@link #onRestart} when 1146 * the activity had been stopped, but is now again being displayed to the 1147 * user. It will be followed by {@link #onResume}. 1148 * 1149 * <p><em>Derived classes must call through to the super class's 1150 * implementation of this method. If they do not, an exception will be 1151 * thrown.</em></p> 1152 * 1153 * @see #onCreate 1154 * @see #onStop 1155 * @see #onResume 1156 */ 1157 protected void onStart() { 1158 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStart " + this); 1159 mCalled = true; 1160 1161 if (!mLoadersStarted) { 1162 mLoadersStarted = true; 1163 if (mLoaderManager != null) { 1164 mLoaderManager.doStart(); 1165 } else if (!mCheckedForLoaderManager) { 1166 mLoaderManager = getLoaderManager("(root)", mLoadersStarted, false); 1167 } 1168 mCheckedForLoaderManager = true; 1169 } 1170 1171 getApplication().dispatchActivityStarted(this); 1172 } 1173 1174 /** 1175 * Called after {@link #onStop} when the current activity is being 1176 * re-displayed to the user (the user has navigated back to it). It will 1177 * be followed by {@link #onStart} and then {@link #onResume}. 1178 * 1179 * <p>For activities that are using raw {@link Cursor} objects (instead of 1180 * creating them through 1181 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1182 * this is usually the place 1183 * where the cursor should be requeried (because you had deactivated it in 1184 * {@link #onStop}. 1185 * 1186 * <p><em>Derived classes must call through to the super class's 1187 * implementation of this method. If they do not, an exception will be 1188 * thrown.</em></p> 1189 * 1190 * @see #onStop 1191 * @see #onStart 1192 * @see #onResume 1193 */ 1194 protected void onRestart() { 1195 mCalled = true; 1196 } 1197 1198 /** 1199 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1200 * {@link #onPause}, for your activity to start interacting with the user. 1201 * This is a good place to begin animations, open exclusive-access devices 1202 * (such as the camera), etc. 1203 * 1204 * <p>Keep in mind that onResume is not the best indicator that your activity 1205 * is visible to the user; a system window such as the keyguard may be in 1206 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1207 * activity is visible to the user (for example, to resume a game). 1208 * 1209 * <p><em>Derived classes must call through to the super class's 1210 * implementation of this method. If they do not, an exception will be 1211 * thrown.</em></p> 1212 * 1213 * @see #onRestoreInstanceState 1214 * @see #onRestart 1215 * @see #onPostResume 1216 * @see #onPause 1217 */ 1218 protected void onResume() { 1219 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this); 1220 getApplication().dispatchActivityResumed(this); 1221 mActivityTransitionState.onResume(); 1222 mCalled = true; 1223 } 1224 1225 /** 1226 * Called when activity resume is complete (after {@link #onResume} has 1227 * been called). Applications will generally not implement this method; 1228 * it is intended for system classes to do final setup after application 1229 * resume code has run. 1230 * 1231 * <p><em>Derived classes must call through to the super class's 1232 * implementation of this method. If they do not, an exception will be 1233 * thrown.</em></p> 1234 * 1235 * @see #onResume 1236 */ 1237 protected void onPostResume() { 1238 final Window win = getWindow(); 1239 if (win != null) win.makeActive(); 1240 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1241 mCalled = true; 1242 } 1243 1244 /** 1245 * @hide 1246 * Check whether this activity is running as part of a voice interaction with the user. 1247 * If true, it should perform its interaction with the user through the 1248 * {@link VoiceInteractor} returned by {@link #getVoiceInteractor}. 1249 */ 1250 @SystemApi 1251 public boolean isVoiceInteraction() { 1252 return mVoiceInteractor != null; 1253 } 1254 1255 /** 1256 * @hide 1257 * Retrieve the active {@link VoiceInteractor} that the user is going through to 1258 * interact with this activity. 1259 */ 1260 @SystemApi 1261 public VoiceInteractor getVoiceInteractor() { 1262 return mVoiceInteractor; 1263 } 1264 1265 /** 1266 * This is called for activities that set launchMode to "singleTop" in 1267 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1268 * flag when calling {@link #startActivity}. In either case, when the 1269 * activity is re-launched while at the top of the activity stack instead 1270 * of a new instance of the activity being started, onNewIntent() will be 1271 * called on the existing instance with the Intent that was used to 1272 * re-launch it. 1273 * 1274 * <p>An activity will always be paused before receiving a new intent, so 1275 * you can count on {@link #onResume} being called after this method. 1276 * 1277 * <p>Note that {@link #getIntent} still returns the original Intent. You 1278 * can use {@link #setIntent} to update it to this new Intent. 1279 * 1280 * @param intent The new intent that was started for the activity. 1281 * 1282 * @see #getIntent 1283 * @see #setIntent 1284 * @see #onResume 1285 */ 1286 protected void onNewIntent(Intent intent) { 1287 } 1288 1289 /** 1290 * The hook for {@link ActivityThread} to save the state of this activity. 1291 * 1292 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1293 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1294 * 1295 * @param outState The bundle to save the state to. 1296 */ 1297 final void performSaveInstanceState(Bundle outState) { 1298 onSaveInstanceState(outState); 1299 saveManagedDialogs(outState); 1300 mActivityTransitionState.saveState(outState); 1301 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState); 1302 } 1303 1304 /** 1305 * The hook for {@link ActivityThread} to save the state of this activity. 1306 * 1307 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1308 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1309 * 1310 * @param outState The bundle to save the state to. 1311 * @param outPersistentState The bundle to save persistent state to. 1312 */ 1313 final void performSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1314 onSaveInstanceState(outState, outPersistentState); 1315 saveManagedDialogs(outState); 1316 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState + 1317 ", " + outPersistentState); 1318 } 1319 1320 /** 1321 * Called to retrieve per-instance state from an activity before being killed 1322 * so that the state can be restored in {@link #onCreate} or 1323 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1324 * will be passed to both). 1325 * 1326 * <p>This method is called before an activity may be killed so that when it 1327 * comes back some time in the future it can restore its state. For example, 1328 * if activity B is launched in front of activity A, and at some point activity 1329 * A is killed to reclaim resources, activity A will have a chance to save the 1330 * current state of its user interface via this method so that when the user 1331 * returns to activity A, the state of the user interface can be restored 1332 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1333 * 1334 * <p>Do not confuse this method with activity lifecycle callbacks such as 1335 * {@link #onPause}, which is always called when an activity is being placed 1336 * in the background or on its way to destruction, or {@link #onStop} which 1337 * is called before destruction. One example of when {@link #onPause} and 1338 * {@link #onStop} is called and not this method is when a user navigates back 1339 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1340 * on B because that particular instance will never be restored, so the 1341 * system avoids calling it. An example when {@link #onPause} is called and 1342 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1343 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1344 * killed during the lifetime of B since the state of the user interface of 1345 * A will stay intact. 1346 * 1347 * <p>The default implementation takes care of most of the UI per-instance 1348 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1349 * view in the hierarchy that has an id, and by saving the id of the currently 1350 * focused view (all of which is restored by the default implementation of 1351 * {@link #onRestoreInstanceState}). If you override this method to save additional 1352 * information not captured by each individual view, you will likely want to 1353 * call through to the default implementation, otherwise be prepared to save 1354 * all of the state of each view yourself. 1355 * 1356 * <p>If called, this method will occur before {@link #onStop}. There are 1357 * no guarantees about whether it will occur before or after {@link #onPause}. 1358 * 1359 * @param outState Bundle in which to place your saved state. 1360 * 1361 * @see #onCreate 1362 * @see #onRestoreInstanceState 1363 * @see #onPause 1364 */ 1365 protected void onSaveInstanceState(Bundle outState) { 1366 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1367 Parcelable p = mFragments.saveAllState(); 1368 if (p != null) { 1369 outState.putParcelable(FRAGMENTS_TAG, p); 1370 } 1371 getApplication().dispatchActivitySaveInstanceState(this, outState); 1372 } 1373 1374 /** 1375 * This is the same as {@link #onSaveInstanceState} but is called for activities 1376 * created with the attribute {@link android.R.attr#persistableMode} set to 1377 * <code>persistAcrossReboots</code>. The {@link android.os.PersistableBundle} passed 1378 * in will be saved and presented in {@link #onCreate(Bundle, PersistableBundle)} 1379 * the first time that this activity is restarted following the next device reboot. 1380 * 1381 * @param outState Bundle in which to place your saved state. 1382 * @param outPersistentState State which will be saved across reboots. 1383 * 1384 * @see #onSaveInstanceState(Bundle) 1385 * @see #onCreate 1386 * @see #onRestoreInstanceState(Bundle, PersistableBundle) 1387 * @see #onPause 1388 */ 1389 public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) { 1390 onSaveInstanceState(outState); 1391 } 1392 1393 /** 1394 * Save the state of any managed dialogs. 1395 * 1396 * @param outState place to store the saved state. 1397 */ 1398 private void saveManagedDialogs(Bundle outState) { 1399 if (mManagedDialogs == null) { 1400 return; 1401 } 1402 1403 final int numDialogs = mManagedDialogs.size(); 1404 if (numDialogs == 0) { 1405 return; 1406 } 1407 1408 Bundle dialogState = new Bundle(); 1409 1410 int[] ids = new int[mManagedDialogs.size()]; 1411 1412 // save each dialog's bundle, gather the ids 1413 for (int i = 0; i < numDialogs; i++) { 1414 final int key = mManagedDialogs.keyAt(i); 1415 ids[i] = key; 1416 final ManagedDialog md = mManagedDialogs.valueAt(i); 1417 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1418 if (md.mArgs != null) { 1419 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1420 } 1421 } 1422 1423 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1424 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1425 } 1426 1427 1428 /** 1429 * Called as part of the activity lifecycle when an activity is going into 1430 * the background, but has not (yet) been killed. The counterpart to 1431 * {@link #onResume}. 1432 * 1433 * <p>When activity B is launched in front of activity A, this callback will 1434 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1435 * so be sure to not do anything lengthy here. 1436 * 1437 * <p>This callback is mostly used for saving any persistent state the 1438 * activity is editing, to present a "edit in place" model to the user and 1439 * making sure nothing is lost if there are not enough resources to start 1440 * the new activity without first killing this one. This is also a good 1441 * place to do things like stop animations and other things that consume a 1442 * noticeable amount of CPU in order to make the switch to the next activity 1443 * as fast as possible, or to close resources that are exclusive access 1444 * such as the camera. 1445 * 1446 * <p>In situations where the system needs more memory it may kill paused 1447 * processes to reclaim resources. Because of this, you should be sure 1448 * that all of your state is saved by the time you return from 1449 * this function. In general {@link #onSaveInstanceState} is used to save 1450 * per-instance state in the activity and this method is used to store 1451 * global persistent data (in content providers, files, etc.) 1452 * 1453 * <p>After receiving this call you will usually receive a following call 1454 * to {@link #onStop} (after the next activity has been resumed and 1455 * displayed), however in some cases there will be a direct call back to 1456 * {@link #onResume} without going through the stopped state. 1457 * 1458 * <p><em>Derived classes must call through to the super class's 1459 * implementation of this method. If they do not, an exception will be 1460 * thrown.</em></p> 1461 * 1462 * @see #onResume 1463 * @see #onSaveInstanceState 1464 * @see #onStop 1465 */ 1466 protected void onPause() { 1467 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this); 1468 getApplication().dispatchActivityPaused(this); 1469 mCalled = true; 1470 } 1471 1472 /** 1473 * Called as part of the activity lifecycle when an activity is about to go 1474 * into the background as the result of user choice. For example, when the 1475 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1476 * when an incoming phone call causes the in-call Activity to be automatically 1477 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1478 * the activity being interrupted. In cases when it is invoked, this method 1479 * is called right before the activity's {@link #onPause} callback. 1480 * 1481 * <p>This callback and {@link #onUserInteraction} are intended to help 1482 * activities manage status bar notifications intelligently; specifically, 1483 * for helping activities determine the proper time to cancel a notfication. 1484 * 1485 * @see #onUserInteraction() 1486 */ 1487 protected void onUserLeaveHint() { 1488 } 1489 1490 /** 1491 * Generate a new thumbnail for this activity. This method is called before 1492 * pausing the activity, and should draw into <var>outBitmap</var> the 1493 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1494 * can use the given <var>canvas</var>, which is configured to draw into the 1495 * bitmap, for rendering if desired. 1496 * 1497 * <p>The default implementation returns fails and does not draw a thumbnail; 1498 * this will result in the platform creating its own thumbnail if needed. 1499 * 1500 * @param outBitmap The bitmap to contain the thumbnail. 1501 * @param canvas Can be used to render into the bitmap. 1502 * 1503 * @return Return true if you have drawn into the bitmap; otherwise after 1504 * you return it will be filled with a default thumbnail. 1505 * 1506 * @see #onCreateDescription 1507 * @see #onSaveInstanceState 1508 * @see #onPause 1509 */ 1510 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1511 return false; 1512 } 1513 1514 /** 1515 * Generate a new description for this activity. This method is called 1516 * before pausing the activity and can, if desired, return some textual 1517 * description of its current state to be displayed to the user. 1518 * 1519 * <p>The default implementation returns null, which will cause you to 1520 * inherit the description from the previous activity. If all activities 1521 * return null, generally the label of the top activity will be used as the 1522 * description. 1523 * 1524 * @return A description of what the user is doing. It should be short and 1525 * sweet (only a few words). 1526 * 1527 * @see #onCreateThumbnail 1528 * @see #onSaveInstanceState 1529 * @see #onPause 1530 */ 1531 @Nullable 1532 public CharSequence onCreateDescription() { 1533 return null; 1534 } 1535 1536 /** 1537 * This is called when the user is requesting an assist, to build a full 1538 * {@link Intent#ACTION_ASSIST} Intent with all of the context of the current 1539 * application. You can override this method to place into the bundle anything 1540 * you would like to appear in the {@link Intent#EXTRA_ASSIST_CONTEXT} part 1541 * of the assist Intent. The default implementation does nothing. 1542 * 1543 * <p>This function will be called after any global assist callbacks that had 1544 * been registered with {@link Application#registerOnProvideAssistDataListener 1545 * Application.registerOnProvideAssistDataListener}. 1546 */ 1547 public void onProvideAssistData(Bundle data) { 1548 } 1549 1550 /** 1551 * Called when you are no longer visible to the user. You will next 1552 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1553 * depending on later user activity. 1554 * 1555 * <p>Note that this method may never be called, in low memory situations 1556 * where the system does not have enough memory to keep your activity's 1557 * process running after its {@link #onPause} method is called. 1558 * 1559 * <p><em>Derived classes must call through to the super class's 1560 * implementation of this method. If they do not, an exception will be 1561 * thrown.</em></p> 1562 * 1563 * @see #onRestart 1564 * @see #onResume 1565 * @see #onSaveInstanceState 1566 * @see #onDestroy 1567 */ 1568 protected void onStop() { 1569 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStop " + this); 1570 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1571 mActivityTransitionState.onStop(); 1572 getApplication().dispatchActivityStopped(this); 1573 mTranslucentCallback = null; 1574 mCalled = true; 1575 } 1576 1577 /** 1578 * Perform any final cleanup before an activity is destroyed. This can 1579 * happen either because the activity is finishing (someone called 1580 * {@link #finish} on it, or because the system is temporarily destroying 1581 * this instance of the activity to save space. You can distinguish 1582 * between these two scenarios with the {@link #isFinishing} method. 1583 * 1584 * <p><em>Note: do not count on this method being called as a place for 1585 * saving data! For example, if an activity is editing data in a content 1586 * provider, those edits should be committed in either {@link #onPause} or 1587 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1588 * free resources like threads that are associated with an activity, so 1589 * that a destroyed activity does not leave such things around while the 1590 * rest of its application is still running. There are situations where 1591 * the system will simply kill the activity's hosting process without 1592 * calling this method (or any others) in it, so it should not be used to 1593 * do things that are intended to remain around after the process goes 1594 * away. 1595 * 1596 * <p><em>Derived classes must call through to the super class's 1597 * implementation of this method. If they do not, an exception will be 1598 * thrown.</em></p> 1599 * 1600 * @see #onPause 1601 * @see #onStop 1602 * @see #finish 1603 * @see #isFinishing 1604 */ 1605 protected void onDestroy() { 1606 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onDestroy " + this); 1607 mCalled = true; 1608 1609 // dismiss any dialogs we are managing. 1610 if (mManagedDialogs != null) { 1611 final int numDialogs = mManagedDialogs.size(); 1612 for (int i = 0; i < numDialogs; i++) { 1613 final ManagedDialog md = mManagedDialogs.valueAt(i); 1614 if (md.mDialog.isShowing()) { 1615 md.mDialog.dismiss(); 1616 } 1617 } 1618 mManagedDialogs = null; 1619 } 1620 1621 // close any cursors we are managing. 1622 synchronized (mManagedCursors) { 1623 int numCursors = mManagedCursors.size(); 1624 for (int i = 0; i < numCursors; i++) { 1625 ManagedCursor c = mManagedCursors.get(i); 1626 if (c != null) { 1627 c.mCursor.close(); 1628 } 1629 } 1630 mManagedCursors.clear(); 1631 } 1632 1633 // Close any open search dialog 1634 if (mSearchManager != null) { 1635 mSearchManager.stopSearch(); 1636 } 1637 1638 getApplication().dispatchActivityDestroyed(this); 1639 } 1640 1641 /** 1642 * Report to the system that your app is now fully drawn, purely for diagnostic 1643 * purposes (calling it does not impact the visible behavior of the activity). 1644 * This is only used to help instrument application launch times, so that the 1645 * app can report when it is fully in a usable state; without this, the only thing 1646 * the system itself can determine is the point at which the activity's window 1647 * is <em>first</em> drawn and displayed. To participate in app launch time 1648 * measurement, you should always call this method after first launch (when 1649 * {@link #onCreate(android.os.Bundle)} is called), at the point where you have 1650 * entirely drawn your UI and populated with all of the significant data. You 1651 * can safely call this method any time after first launch as well, in which case 1652 * it will simply be ignored. 1653 */ 1654 public void reportFullyDrawn() { 1655 if (mDoReportFullyDrawn) { 1656 mDoReportFullyDrawn = false; 1657 try { 1658 ActivityManagerNative.getDefault().reportActivityFullyDrawn(mToken); 1659 } catch (RemoteException e) { 1660 } 1661 } 1662 } 1663 1664 /** 1665 * Called by the system when the device configuration changes while your 1666 * activity is running. Note that this will <em>only</em> be called if 1667 * you have selected configurations you would like to handle with the 1668 * {@link android.R.attr#configChanges} attribute in your manifest. If 1669 * any configuration change occurs that is not selected to be reported 1670 * by that attribute, then instead of reporting it the system will stop 1671 * and restart the activity (to have it launched with the new 1672 * configuration). 1673 * 1674 * <p>At the time that this function has been called, your Resources 1675 * object will have been updated to return resource values matching the 1676 * new configuration. 1677 * 1678 * @param newConfig The new device configuration. 1679 */ 1680 public void onConfigurationChanged(Configuration newConfig) { 1681 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig); 1682 mCalled = true; 1683 1684 mFragments.dispatchConfigurationChanged(newConfig); 1685 1686 if (mWindow != null) { 1687 // Pass the configuration changed event to the window 1688 mWindow.onConfigurationChanged(newConfig); 1689 } 1690 1691 if (mActionBar != null) { 1692 // Do this last; the action bar will need to access 1693 // view changes from above. 1694 mActionBar.onConfigurationChanged(newConfig); 1695 } 1696 } 1697 1698 /** 1699 * If this activity is being destroyed because it can not handle a 1700 * configuration parameter being changed (and thus its 1701 * {@link #onConfigurationChanged(Configuration)} method is 1702 * <em>not</em> being called), then you can use this method to discover 1703 * the set of changes that have occurred while in the process of being 1704 * destroyed. Note that there is no guarantee that these will be 1705 * accurate (other changes could have happened at any time), so you should 1706 * only use this as an optimization hint. 1707 * 1708 * @return Returns a bit field of the configuration parameters that are 1709 * changing, as defined by the {@link android.content.res.Configuration} 1710 * class. 1711 */ 1712 public int getChangingConfigurations() { 1713 return mConfigChangeFlags; 1714 } 1715 1716 /** 1717 * Retrieve the non-configuration instance data that was previously 1718 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1719 * be available from the initial {@link #onCreate} and 1720 * {@link #onStart} calls to the new instance, allowing you to extract 1721 * any useful dynamic state from the previous instance. 1722 * 1723 * <p>Note that the data you retrieve here should <em>only</em> be used 1724 * as an optimization for handling configuration changes. You should always 1725 * be able to handle getting a null pointer back, and an activity must 1726 * still be able to restore itself to its previous state (through the 1727 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1728 * function returns null. 1729 * 1730 * @return Returns the object previously returned by 1731 * {@link #onRetainNonConfigurationInstance()}. 1732 * 1733 * @deprecated Use the new {@link Fragment} API 1734 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1735 * available on older platforms through the Android compatibility package. 1736 */ 1737 @Nullable 1738 @Deprecated 1739 public Object getLastNonConfigurationInstance() { 1740 return mLastNonConfigurationInstances != null 1741 ? mLastNonConfigurationInstances.activity : null; 1742 } 1743 1744 /** 1745 * Called by the system, as part of destroying an 1746 * activity due to a configuration change, when it is known that a new 1747 * instance will immediately be created for the new configuration. You 1748 * can return any object you like here, including the activity instance 1749 * itself, which can later be retrieved by calling 1750 * {@link #getLastNonConfigurationInstance()} in the new activity 1751 * instance. 1752 * 1753 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1754 * or later, consider instead using a {@link Fragment} with 1755 * {@link Fragment#setRetainInstance(boolean) 1756 * Fragment.setRetainInstance(boolean}.</em> 1757 * 1758 * <p>This function is called purely as an optimization, and you must 1759 * not rely on it being called. When it is called, a number of guarantees 1760 * will be made to help optimize configuration switching: 1761 * <ul> 1762 * <li> The function will be called between {@link #onStop} and 1763 * {@link #onDestroy}. 1764 * <li> A new instance of the activity will <em>always</em> be immediately 1765 * created after this one's {@link #onDestroy()} is called. In particular, 1766 * <em>no</em> messages will be dispatched during this time (when the returned 1767 * object does not have an activity to be associated with). 1768 * <li> The object you return here will <em>always</em> be available from 1769 * the {@link #getLastNonConfigurationInstance()} method of the following 1770 * activity instance as described there. 1771 * </ul> 1772 * 1773 * <p>These guarantees are designed so that an activity can use this API 1774 * to propagate extensive state from the old to new activity instance, from 1775 * loaded bitmaps, to network connections, to evenly actively running 1776 * threads. Note that you should <em>not</em> propagate any data that 1777 * may change based on the configuration, including any data loaded from 1778 * resources such as strings, layouts, or drawables. 1779 * 1780 * <p>The guarantee of no message handling during the switch to the next 1781 * activity simplifies use with active objects. For example if your retained 1782 * state is an {@link android.os.AsyncTask} you are guaranteed that its 1783 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 1784 * not be called from the call here until you execute the next instance's 1785 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 1786 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 1787 * running in a separate thread.) 1788 * 1789 * @return Return any Object holding the desired state to propagate to the 1790 * next activity instance. 1791 * 1792 * @deprecated Use the new {@link Fragment} API 1793 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1794 * available on older platforms through the Android compatibility package. 1795 */ 1796 public Object onRetainNonConfigurationInstance() { 1797 return null; 1798 } 1799 1800 /** 1801 * Retrieve the non-configuration instance data that was previously 1802 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1803 * be available from the initial {@link #onCreate} and 1804 * {@link #onStart} calls to the new instance, allowing you to extract 1805 * any useful dynamic state from the previous instance. 1806 * 1807 * <p>Note that the data you retrieve here should <em>only</em> be used 1808 * as an optimization for handling configuration changes. You should always 1809 * be able to handle getting a null pointer back, and an activity must 1810 * still be able to restore itself to its previous state (through the 1811 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1812 * function returns null. 1813 * 1814 * @return Returns the object previously returned by 1815 * {@link #onRetainNonConfigurationChildInstances()} 1816 */ 1817 @Nullable 1818 HashMap<String, Object> getLastNonConfigurationChildInstances() { 1819 return mLastNonConfigurationInstances != null 1820 ? mLastNonConfigurationInstances.children : null; 1821 } 1822 1823 /** 1824 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1825 * it should return either a mapping from child activity id strings to arbitrary objects, 1826 * or null. This method is intended to be used by Activity framework subclasses that control a 1827 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1828 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1829 */ 1830 @Nullable 1831 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1832 return null; 1833 } 1834 1835 NonConfigurationInstances retainNonConfigurationInstances() { 1836 Object activity = onRetainNonConfigurationInstance(); 1837 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 1838 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 1839 boolean retainLoaders = false; 1840 if (mAllLoaderManagers != null) { 1841 // prune out any loader managers that were already stopped and so 1842 // have nothing useful to retain. 1843 final int N = mAllLoaderManagers.size(); 1844 LoaderManagerImpl loaders[] = new LoaderManagerImpl[N]; 1845 for (int i=N-1; i>=0; i--) { 1846 loaders[i] = mAllLoaderManagers.valueAt(i); 1847 } 1848 for (int i=0; i<N; i++) { 1849 LoaderManagerImpl lm = loaders[i]; 1850 if (lm.mRetaining) { 1851 retainLoaders = true; 1852 } else { 1853 lm.doDestroy(); 1854 mAllLoaderManagers.remove(lm.mWho); 1855 } 1856 } 1857 } 1858 if (activity == null && children == null && fragments == null && !retainLoaders 1859 && mVoiceInteractor == null) { 1860 return null; 1861 } 1862 1863 NonConfigurationInstances nci = new NonConfigurationInstances(); 1864 nci.activity = activity; 1865 nci.children = children; 1866 nci.fragments = fragments; 1867 nci.loaders = mAllLoaderManagers; 1868 nci.voiceInteractor = mVoiceInteractor; 1869 return nci; 1870 } 1871 1872 public void onLowMemory() { 1873 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onLowMemory " + this); 1874 mCalled = true; 1875 mFragments.dispatchLowMemory(); 1876 } 1877 1878 public void onTrimMemory(int level) { 1879 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onTrimMemory " + this + ": " + level); 1880 mCalled = true; 1881 mFragments.dispatchTrimMemory(level); 1882 } 1883 1884 /** 1885 * Return the FragmentManager for interacting with fragments associated 1886 * with this activity. 1887 */ 1888 public FragmentManager getFragmentManager() { 1889 return mFragments; 1890 } 1891 1892 void invalidateFragment(String who) { 1893 //Log.v(TAG, "invalidateFragmentIndex: index=" + index); 1894 if (mAllLoaderManagers != null) { 1895 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 1896 if (lm != null && !lm.mRetaining) { 1897 lm.doDestroy(); 1898 mAllLoaderManagers.remove(who); 1899 } 1900 } 1901 } 1902 1903 /** 1904 * Called when a Fragment is being attached to this activity, immediately 1905 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 1906 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 1907 */ 1908 public void onAttachFragment(Fragment fragment) { 1909 } 1910 1911 /** 1912 * Wrapper around 1913 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1914 * that gives the resulting {@link Cursor} to call 1915 * {@link #startManagingCursor} so that the activity will manage its 1916 * lifecycle for you. 1917 * 1918 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1919 * or later, consider instead using {@link LoaderManager} instead, available 1920 * via {@link #getLoaderManager()}.</em> 1921 * 1922 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1923 * this method, because the activity will do that for you at the appropriate time. However, if 1924 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1925 * not</em> automatically close the cursor and, in that case, you must call 1926 * {@link Cursor#close()}.</p> 1927 * 1928 * @param uri The URI of the content provider to query. 1929 * @param projection List of columns to return. 1930 * @param selection SQL WHERE clause. 1931 * @param sortOrder SQL ORDER BY clause. 1932 * 1933 * @return The Cursor that was returned by query(). 1934 * 1935 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1936 * @see #startManagingCursor 1937 * @hide 1938 * 1939 * @deprecated Use {@link CursorLoader} instead. 1940 */ 1941 @Deprecated 1942 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1943 String sortOrder) { 1944 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1945 if (c != null) { 1946 startManagingCursor(c); 1947 } 1948 return c; 1949 } 1950 1951 /** 1952 * Wrapper around 1953 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1954 * that gives the resulting {@link Cursor} to call 1955 * {@link #startManagingCursor} so that the activity will manage its 1956 * lifecycle for you. 1957 * 1958 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1959 * or later, consider instead using {@link LoaderManager} instead, available 1960 * via {@link #getLoaderManager()}.</em> 1961 * 1962 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1963 * this method, because the activity will do that for you at the appropriate time. However, if 1964 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1965 * not</em> automatically close the cursor and, in that case, you must call 1966 * {@link Cursor#close()}.</p> 1967 * 1968 * @param uri The URI of the content provider to query. 1969 * @param projection List of columns to return. 1970 * @param selection SQL WHERE clause. 1971 * @param selectionArgs The arguments to selection, if any ?s are pesent 1972 * @param sortOrder SQL ORDER BY clause. 1973 * 1974 * @return The Cursor that was returned by query(). 1975 * 1976 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1977 * @see #startManagingCursor 1978 * 1979 * @deprecated Use {@link CursorLoader} instead. 1980 */ 1981 @Deprecated 1982 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1983 String[] selectionArgs, String sortOrder) { 1984 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1985 if (c != null) { 1986 startManagingCursor(c); 1987 } 1988 return c; 1989 } 1990 1991 /** 1992 * This method allows the activity to take care of managing the given 1993 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1994 * That is, when the activity is stopped it will automatically call 1995 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1996 * it will call {@link Cursor#requery} for you. When the activity is 1997 * destroyed, all managed Cursors will be closed automatically. 1998 * 1999 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2000 * or later, consider instead using {@link LoaderManager} instead, available 2001 * via {@link #getLoaderManager()}.</em> 2002 * 2003 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 2004 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 2005 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 2006 * <em>will not</em> automatically close the cursor and, in that case, you must call 2007 * {@link Cursor#close()}.</p> 2008 * 2009 * @param c The Cursor to be managed. 2010 * 2011 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 2012 * @see #stopManagingCursor 2013 * 2014 * @deprecated Use the new {@link android.content.CursorLoader} class with 2015 * {@link LoaderManager} instead; this is also 2016 * available on older platforms through the Android compatibility package. 2017 */ 2018 @Deprecated 2019 public void startManagingCursor(Cursor c) { 2020 synchronized (mManagedCursors) { 2021 mManagedCursors.add(new ManagedCursor(c)); 2022 } 2023 } 2024 2025 /** 2026 * Given a Cursor that was previously given to 2027 * {@link #startManagingCursor}, stop the activity's management of that 2028 * cursor. 2029 * 2030 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 2031 * the system <em>will not</em> automatically close the cursor and you must call 2032 * {@link Cursor#close()}.</p> 2033 * 2034 * @param c The Cursor that was being managed. 2035 * 2036 * @see #startManagingCursor 2037 * 2038 * @deprecated Use the new {@link android.content.CursorLoader} class with 2039 * {@link LoaderManager} instead; this is also 2040 * available on older platforms through the Android compatibility package. 2041 */ 2042 @Deprecated 2043 public void stopManagingCursor(Cursor c) { 2044 synchronized (mManagedCursors) { 2045 final int N = mManagedCursors.size(); 2046 for (int i=0; i<N; i++) { 2047 ManagedCursor mc = mManagedCursors.get(i); 2048 if (mc.mCursor == c) { 2049 mManagedCursors.remove(i); 2050 break; 2051 } 2052 } 2053 } 2054 } 2055 2056 /** 2057 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 2058 * this is a no-op. 2059 * @hide 2060 */ 2061 @Deprecated 2062 public void setPersistent(boolean isPersistent) { 2063 } 2064 2065 /** 2066 * Finds a view that was identified by the id attribute from the XML that 2067 * was processed in {@link #onCreate}. 2068 * 2069 * @return The view if found or null otherwise. 2070 */ 2071 public View findViewById(int id) { 2072 return getWindow().findViewById(id); 2073 } 2074 2075 /** 2076 * Retrieve a reference to this activity's ActionBar. 2077 * 2078 * @return The Activity's ActionBar, or null if it does not have one. 2079 */ 2080 @Nullable 2081 public ActionBar getActionBar() { 2082 initWindowDecorActionBar(); 2083 return mActionBar; 2084 } 2085 2086 /** 2087 * Set a {@link android.widget.Toolbar Toolbar} to act as the {@link ActionBar} for this 2088 * Activity window. 2089 * 2090 * <p>When set to a non-null value the {@link #getActionBar()} method will return 2091 * an {@link ActionBar} object that can be used to control the given toolbar as if it were 2092 * a traditional window decor action bar. The toolbar's menu will be populated with the 2093 * Activity's options menu and the navigation button will be wired through the standard 2094 * {@link android.R.id#home home} menu select action.</p> 2095 * 2096 * <p>In order to use a Toolbar within the Activity's window content the application 2097 * must not request the window feature {@link Window#FEATURE_ACTION_BAR FEATURE_ACTION_BAR}.</p> 2098 * 2099 * @param toolbar Toolbar to set as the Activity's action bar 2100 */ 2101 public void setActionBar(@Nullable Toolbar toolbar) { 2102 if (getActionBar() instanceof WindowDecorActionBar) { 2103 throw new IllegalStateException("This Activity already has an action bar supplied " + 2104 "by the window decor. Do not request Window.FEATURE_ACTION_BAR and set " + 2105 "android:windowActionBar to false in your theme to use a Toolbar instead."); 2106 } 2107 ToolbarActionBar tbab = new ToolbarActionBar(toolbar, getTitle(), this); 2108 mActionBar = tbab; 2109 mWindow.setCallback(tbab.getWrappedWindowCallback()); 2110 mActionBar.invalidateOptionsMenu(); 2111 } 2112 2113 /** 2114 * Creates a new ActionBar, locates the inflated ActionBarView, 2115 * initializes the ActionBar with the view, and sets mActionBar. 2116 */ 2117 private void initWindowDecorActionBar() { 2118 Window window = getWindow(); 2119 2120 // Initializing the window decor can change window feature flags. 2121 // Make sure that we have the correct set before performing the test below. 2122 window.getDecorView(); 2123 2124 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 2125 return; 2126 } 2127 2128 mActionBar = new WindowDecorActionBar(this); 2129 mActionBar.setDefaultDisplayHomeAsUpEnabled(mEnableDefaultActionBarUp); 2130 2131 mWindow.setDefaultIcon(mActivityInfo.getIconResource()); 2132 mWindow.setDefaultLogo(mActivityInfo.getLogoResource()); 2133 } 2134 2135 /** 2136 * Set the activity content from a layout resource. The resource will be 2137 * inflated, adding all top-level views to the activity. 2138 * 2139 * @param layoutResID Resource ID to be inflated. 2140 * 2141 * @see #setContentView(android.view.View) 2142 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2143 */ 2144 public void setContentView(int layoutResID) { 2145 getWindow().setContentView(layoutResID); 2146 initWindowDecorActionBar(); 2147 } 2148 2149 /** 2150 * Set the activity content to an explicit view. This view is placed 2151 * directly into the activity's view hierarchy. It can itself be a complex 2152 * view hierarchy. When calling this method, the layout parameters of the 2153 * specified view are ignored. Both the width and the height of the view are 2154 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 2155 * your own layout parameters, invoke 2156 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 2157 * instead. 2158 * 2159 * @param view The desired content to display. 2160 * 2161 * @see #setContentView(int) 2162 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 2163 */ 2164 public void setContentView(View view) { 2165 getWindow().setContentView(view); 2166 initWindowDecorActionBar(); 2167 } 2168 2169 /** 2170 * Set the activity content to an explicit view. This view is placed 2171 * directly into the activity's view hierarchy. It can itself be a complex 2172 * view hierarchy. 2173 * 2174 * @param view The desired content to display. 2175 * @param params Layout parameters for the view. 2176 * 2177 * @see #setContentView(android.view.View) 2178 * @see #setContentView(int) 2179 */ 2180 public void setContentView(View view, ViewGroup.LayoutParams params) { 2181 getWindow().setContentView(view, params); 2182 initWindowDecorActionBar(); 2183 } 2184 2185 /** 2186 * Add an additional content view to the activity. Added after any existing 2187 * ones in the activity -- existing views are NOT removed. 2188 * 2189 * @param view The desired content to display. 2190 * @param params Layout parameters for the view. 2191 */ 2192 public void addContentView(View view, ViewGroup.LayoutParams params) { 2193 getWindow().addContentView(view, params); 2194 initWindowDecorActionBar(); 2195 } 2196 2197 /** 2198 * Retrieve the {@link TransitionManager} responsible for default transitions in this window. 2199 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2200 * 2201 * <p>This method will return non-null after content has been initialized (e.g. by using 2202 * {@link #setContentView}) if {@link Window#FEATURE_CONTENT_TRANSITIONS} has been granted.</p> 2203 * 2204 * @return This window's content TransitionManager or null if none is set. 2205 */ 2206 public TransitionManager getContentTransitionManager() { 2207 return getWindow().getTransitionManager(); 2208 } 2209 2210 /** 2211 * Set the {@link TransitionManager} to use for default transitions in this window. 2212 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2213 * 2214 * @param tm The TransitionManager to use for scene changes. 2215 */ 2216 public void setContentTransitionManager(TransitionManager tm) { 2217 getWindow().setTransitionManager(tm); 2218 } 2219 2220 /** 2221 * Retrieve the {@link Scene} representing this window's current content. 2222 * Requires {@link Window#FEATURE_CONTENT_TRANSITIONS}. 2223 * 2224 * <p>This method will return null if the current content is not represented by a Scene.</p> 2225 * 2226 * @return Current Scene being shown or null 2227 */ 2228 public Scene getContentScene() { 2229 return getWindow().getContentScene(); 2230 } 2231 2232 /** 2233 * Sets whether this activity is finished when touched outside its window's 2234 * bounds. 2235 */ 2236 public void setFinishOnTouchOutside(boolean finish) { 2237 mWindow.setCloseOnTouchOutside(finish); 2238 } 2239 2240 /** @hide */ 2241 @IntDef({ 2242 DEFAULT_KEYS_DISABLE, 2243 DEFAULT_KEYS_DIALER, 2244 DEFAULT_KEYS_SHORTCUT, 2245 DEFAULT_KEYS_SEARCH_LOCAL, 2246 DEFAULT_KEYS_SEARCH_GLOBAL}) 2247 @Retention(RetentionPolicy.SOURCE) 2248 @interface DefaultKeyMode {} 2249 2250 /** 2251 * Use with {@link #setDefaultKeyMode} to turn off default handling of 2252 * keys. 2253 * 2254 * @see #setDefaultKeyMode 2255 */ 2256 static public final int DEFAULT_KEYS_DISABLE = 0; 2257 /** 2258 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 2259 * key handling. 2260 * 2261 * @see #setDefaultKeyMode 2262 */ 2263 static public final int DEFAULT_KEYS_DIALER = 1; 2264 /** 2265 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 2266 * default key handling. 2267 * 2268 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 2269 * 2270 * @see #setDefaultKeyMode 2271 */ 2272 static public final int DEFAULT_KEYS_SHORTCUT = 2; 2273 /** 2274 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2275 * will start an application-defined search. (If the application or activity does not 2276 * actually define a search, the the keys will be ignored.) 2277 * 2278 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2279 * 2280 * @see #setDefaultKeyMode 2281 */ 2282 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 2283 2284 /** 2285 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2286 * will start a global search (typically web search, but some platforms may define alternate 2287 * methods for global search) 2288 * 2289 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2290 * 2291 * @see #setDefaultKeyMode 2292 */ 2293 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 2294 2295 /** 2296 * Select the default key handling for this activity. This controls what 2297 * will happen to key events that are not otherwise handled. The default 2298 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 2299 * floor. Other modes allow you to launch the dialer 2300 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 2301 * menu without requiring the menu key be held down 2302 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 2303 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 2304 * 2305 * <p>Note that the mode selected here does not impact the default 2306 * handling of system keys, such as the "back" and "menu" keys, and your 2307 * activity and its views always get a first chance to receive and handle 2308 * all application keys. 2309 * 2310 * @param mode The desired default key mode constant. 2311 * 2312 * @see #DEFAULT_KEYS_DISABLE 2313 * @see #DEFAULT_KEYS_DIALER 2314 * @see #DEFAULT_KEYS_SHORTCUT 2315 * @see #DEFAULT_KEYS_SEARCH_LOCAL 2316 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 2317 * @see #onKeyDown 2318 */ 2319 public final void setDefaultKeyMode(@DefaultKeyMode int mode) { 2320 mDefaultKeyMode = mode; 2321 2322 // Some modes use a SpannableStringBuilder to track & dispatch input events 2323 // This list must remain in sync with the switch in onKeyDown() 2324 switch (mode) { 2325 case DEFAULT_KEYS_DISABLE: 2326 case DEFAULT_KEYS_SHORTCUT: 2327 mDefaultKeySsb = null; // not used in these modes 2328 break; 2329 case DEFAULT_KEYS_DIALER: 2330 case DEFAULT_KEYS_SEARCH_LOCAL: 2331 case DEFAULT_KEYS_SEARCH_GLOBAL: 2332 mDefaultKeySsb = new SpannableStringBuilder(); 2333 Selection.setSelection(mDefaultKeySsb,0); 2334 break; 2335 default: 2336 throw new IllegalArgumentException(); 2337 } 2338 } 2339 2340 /** 2341 * Called when a key was pressed down and not handled by any of the views 2342 * inside of the activity. So, for example, key presses while the cursor 2343 * is inside a TextView will not trigger the event (unless it is a navigation 2344 * to another object) because TextView handles its own key presses. 2345 * 2346 * <p>If the focused view didn't want this event, this method is called. 2347 * 2348 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2349 * by calling {@link #onBackPressed()}, though the behavior varies based 2350 * on the application compatibility mode: for 2351 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2352 * it will set up the dispatch to call {@link #onKeyUp} where the action 2353 * will be performed; for earlier applications, it will perform the 2354 * action immediately in on-down, as those versions of the platform 2355 * behaved. 2356 * 2357 * <p>Other additional default key handling may be performed 2358 * if configured with {@link #setDefaultKeyMode}. 2359 * 2360 * @return Return <code>true</code> to prevent this event from being propagated 2361 * further, or <code>false</code> to indicate that you have not handled 2362 * this event and it should continue to be propagated. 2363 * @see #onKeyUp 2364 * @see android.view.KeyEvent 2365 */ 2366 public boolean onKeyDown(int keyCode, KeyEvent event) { 2367 if (keyCode == KeyEvent.KEYCODE_BACK) { 2368 if (getApplicationInfo().targetSdkVersion 2369 >= Build.VERSION_CODES.ECLAIR) { 2370 event.startTracking(); 2371 } else { 2372 onBackPressed(); 2373 } 2374 return true; 2375 } 2376 2377 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2378 return false; 2379 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2380 Window w = getWindow(); 2381 if (w.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 2382 w.performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, keyCode, event, 2383 Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2384 return true; 2385 } 2386 return false; 2387 } else { 2388 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2389 boolean clearSpannable = false; 2390 boolean handled; 2391 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2392 clearSpannable = true; 2393 handled = false; 2394 } else { 2395 handled = TextKeyListener.getInstance().onKeyDown( 2396 null, mDefaultKeySsb, keyCode, event); 2397 if (handled && mDefaultKeySsb.length() > 0) { 2398 // something useable has been typed - dispatch it now. 2399 2400 final String str = mDefaultKeySsb.toString(); 2401 clearSpannable = true; 2402 2403 switch (mDefaultKeyMode) { 2404 case DEFAULT_KEYS_DIALER: 2405 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2406 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2407 startActivity(intent); 2408 break; 2409 case DEFAULT_KEYS_SEARCH_LOCAL: 2410 startSearch(str, false, null, false); 2411 break; 2412 case DEFAULT_KEYS_SEARCH_GLOBAL: 2413 startSearch(str, false, null, true); 2414 break; 2415 } 2416 } 2417 } 2418 if (clearSpannable) { 2419 mDefaultKeySsb.clear(); 2420 mDefaultKeySsb.clearSpans(); 2421 Selection.setSelection(mDefaultKeySsb,0); 2422 } 2423 return handled; 2424 } 2425 } 2426 2427 /** 2428 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2429 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2430 * the event). 2431 */ 2432 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2433 return false; 2434 } 2435 2436 /** 2437 * Called when a key was released and not handled by any of the views 2438 * inside of the activity. So, for example, key presses while the cursor 2439 * is inside a TextView will not trigger the event (unless it is a navigation 2440 * to another object) because TextView handles its own key presses. 2441 * 2442 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2443 * and go back. 2444 * 2445 * @return Return <code>true</code> to prevent this event from being propagated 2446 * further, or <code>false</code> to indicate that you have not handled 2447 * this event and it should continue to be propagated. 2448 * @see #onKeyDown 2449 * @see KeyEvent 2450 */ 2451 public boolean onKeyUp(int keyCode, KeyEvent event) { 2452 if (getApplicationInfo().targetSdkVersion 2453 >= Build.VERSION_CODES.ECLAIR) { 2454 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2455 && !event.isCanceled()) { 2456 onBackPressed(); 2457 return true; 2458 } 2459 } 2460 return false; 2461 } 2462 2463 /** 2464 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2465 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2466 * the event). 2467 */ 2468 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2469 return false; 2470 } 2471 2472 /** 2473 * Called when the activity has detected the user's press of the back 2474 * key. The default implementation simply finishes the current activity, 2475 * but you can override this to do whatever you want. 2476 */ 2477 public void onBackPressed() { 2478 if (mActionBar != null && mActionBar.collapseActionView()) { 2479 return; 2480 } 2481 2482 if (!mFragments.popBackStackImmediate()) { 2483 finishAfterTransition(); 2484 } 2485 } 2486 2487 /** 2488 * Called when a key shortcut event is not handled by any of the views in the Activity. 2489 * Override this method to implement global key shortcuts for the Activity. 2490 * Key shortcuts can also be implemented by setting the 2491 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2492 * 2493 * @param keyCode The value in event.getKeyCode(). 2494 * @param event Description of the key event. 2495 * @return True if the key shortcut was handled. 2496 */ 2497 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2498 return false; 2499 } 2500 2501 /** 2502 * Called when a touch screen event was not handled by any of the views 2503 * under it. This is most useful to process touch events that happen 2504 * outside of your window bounds, where there is no view to receive it. 2505 * 2506 * @param event The touch screen event being processed. 2507 * 2508 * @return Return true if you have consumed the event, false if you haven't. 2509 * The default implementation always returns false. 2510 */ 2511 public boolean onTouchEvent(MotionEvent event) { 2512 if (mWindow.shouldCloseOnTouch(this, event)) { 2513 finish(); 2514 return true; 2515 } 2516 2517 return false; 2518 } 2519 2520 /** 2521 * Called when the trackball was moved and not handled by any of the 2522 * views inside of the activity. So, for example, if the trackball moves 2523 * while focus is on a button, you will receive a call here because 2524 * buttons do not normally do anything with trackball events. The call 2525 * here happens <em>before</em> trackball movements are converted to 2526 * DPAD key events, which then get sent back to the view hierarchy, and 2527 * will be processed at the point for things like focus navigation. 2528 * 2529 * @param event The trackball event being processed. 2530 * 2531 * @return Return true if you have consumed the event, false if you haven't. 2532 * The default implementation always returns false. 2533 */ 2534 public boolean onTrackballEvent(MotionEvent event) { 2535 return false; 2536 } 2537 2538 /** 2539 * Called when a generic motion event was not handled by any of the 2540 * views inside of the activity. 2541 * <p> 2542 * Generic motion events describe joystick movements, mouse hovers, track pad 2543 * touches, scroll wheel movements and other input events. The 2544 * {@link MotionEvent#getSource() source} of the motion event specifies 2545 * the class of input that was received. Implementations of this method 2546 * must examine the bits in the source before processing the event. 2547 * The following code example shows how this is done. 2548 * </p><p> 2549 * Generic motion events with source class 2550 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2551 * are delivered to the view under the pointer. All other generic motion events are 2552 * delivered to the focused view. 2553 * </p><p> 2554 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2555 * handle this event. 2556 * </p> 2557 * 2558 * @param event The generic motion event being processed. 2559 * 2560 * @return Return true if you have consumed the event, false if you haven't. 2561 * The default implementation always returns false. 2562 */ 2563 public boolean onGenericMotionEvent(MotionEvent event) { 2564 return false; 2565 } 2566 2567 /** 2568 * Called whenever a key, touch, or trackball event is dispatched to the 2569 * activity. Implement this method if you wish to know that the user has 2570 * interacted with the device in some way while your activity is running. 2571 * This callback and {@link #onUserLeaveHint} are intended to help 2572 * activities manage status bar notifications intelligently; specifically, 2573 * for helping activities determine the proper time to cancel a notfication. 2574 * 2575 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2576 * be accompanied by calls to {@link #onUserInteraction}. This 2577 * ensures that your activity will be told of relevant user activity such 2578 * as pulling down the notification pane and touching an item there. 2579 * 2580 * <p>Note that this callback will be invoked for the touch down action 2581 * that begins a touch gesture, but may not be invoked for the touch-moved 2582 * and touch-up actions that follow. 2583 * 2584 * @see #onUserLeaveHint() 2585 */ 2586 public void onUserInteraction() { 2587 } 2588 2589 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2590 // Update window manager if: we have a view, that view is 2591 // attached to its parent (which will be a RootView), and 2592 // this activity is not embedded. 2593 if (mParent == null) { 2594 View decor = mDecor; 2595 if (decor != null && decor.getParent() != null) { 2596 getWindowManager().updateViewLayout(decor, params); 2597 } 2598 } 2599 } 2600 2601 public void onContentChanged() { 2602 } 2603 2604 /** 2605 * Called when the current {@link Window} of the activity gains or loses 2606 * focus. This is the best indicator of whether this activity is visible 2607 * to the user. The default implementation clears the key tracking 2608 * state, so should always be called. 2609 * 2610 * <p>Note that this provides information about global focus state, which 2611 * is managed independently of activity lifecycles. As such, while focus 2612 * changes will generally have some relation to lifecycle changes (an 2613 * activity that is stopped will not generally get window focus), you 2614 * should not rely on any particular order between the callbacks here and 2615 * those in the other lifecycle methods such as {@link #onResume}. 2616 * 2617 * <p>As a general rule, however, a resumed activity will have window 2618 * focus... unless it has displayed other dialogs or popups that take 2619 * input focus, in which case the activity itself will not have focus 2620 * when the other windows have it. Likewise, the system may display 2621 * system-level windows (such as the status bar notification panel or 2622 * a system alert) which will temporarily take window input focus without 2623 * pausing the foreground activity. 2624 * 2625 * @param hasFocus Whether the window of this activity has focus. 2626 * 2627 * @see #hasWindowFocus() 2628 * @see #onResume 2629 * @see View#onWindowFocusChanged(boolean) 2630 */ 2631 public void onWindowFocusChanged(boolean hasFocus) { 2632 } 2633 2634 /** 2635 * Called when the main window associated with the activity has been 2636 * attached to the window manager. 2637 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2638 * for more information. 2639 * @see View#onAttachedToWindow 2640 */ 2641 public void onAttachedToWindow() { 2642 } 2643 2644 /** 2645 * Called when the main window associated with the activity has been 2646 * detached from the window manager. 2647 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2648 * for more information. 2649 * @see View#onDetachedFromWindow 2650 */ 2651 public void onDetachedFromWindow() { 2652 } 2653 2654 /** 2655 * Returns true if this activity's <em>main</em> window currently has window focus. 2656 * Note that this is not the same as the view itself having focus. 2657 * 2658 * @return True if this activity's main window currently has window focus. 2659 * 2660 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2661 */ 2662 public boolean hasWindowFocus() { 2663 Window w = getWindow(); 2664 if (w != null) { 2665 View d = w.getDecorView(); 2666 if (d != null) { 2667 return d.hasWindowFocus(); 2668 } 2669 } 2670 return false; 2671 } 2672 2673 /** 2674 * Called when the main window associated with the activity has been dismissed. 2675 * @hide 2676 */ 2677 @Override 2678 public void onWindowDismissed() { 2679 finish(); 2680 } 2681 2682 /** 2683 * Called to process key events. You can override this to intercept all 2684 * key events before they are dispatched to the window. Be sure to call 2685 * this implementation for key events that should be handled normally. 2686 * 2687 * @param event The key event. 2688 * 2689 * @return boolean Return true if this event was consumed. 2690 */ 2691 public boolean dispatchKeyEvent(KeyEvent event) { 2692 onUserInteraction(); 2693 2694 // Let action bars open menus in response to the menu key prioritized over 2695 // the window handling it 2696 if (event.getKeyCode() == KeyEvent.KEYCODE_MENU && 2697 mActionBar != null && mActionBar.onMenuKeyEvent(event)) { 2698 return true; 2699 } 2700 2701 Window win = getWindow(); 2702 if (win.superDispatchKeyEvent(event)) { 2703 return true; 2704 } 2705 View decor = mDecor; 2706 if (decor == null) decor = win.getDecorView(); 2707 return event.dispatch(this, decor != null 2708 ? decor.getKeyDispatcherState() : null, this); 2709 } 2710 2711 /** 2712 * Called to process a key shortcut event. 2713 * You can override this to intercept all key shortcut events before they are 2714 * dispatched to the window. Be sure to call this implementation for key shortcut 2715 * events that should be handled normally. 2716 * 2717 * @param event The key shortcut event. 2718 * @return True if this event was consumed. 2719 */ 2720 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 2721 onUserInteraction(); 2722 if (getWindow().superDispatchKeyShortcutEvent(event)) { 2723 return true; 2724 } 2725 return onKeyShortcut(event.getKeyCode(), event); 2726 } 2727 2728 /** 2729 * Called to process touch screen events. You can override this to 2730 * intercept all touch screen events before they are dispatched to the 2731 * window. Be sure to call this implementation for touch screen events 2732 * that should be handled normally. 2733 * 2734 * @param ev The touch screen event. 2735 * 2736 * @return boolean Return true if this event was consumed. 2737 */ 2738 public boolean dispatchTouchEvent(MotionEvent ev) { 2739 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2740 onUserInteraction(); 2741 } 2742 if (getWindow().superDispatchTouchEvent(ev)) { 2743 return true; 2744 } 2745 return onTouchEvent(ev); 2746 } 2747 2748 /** 2749 * Called to process trackball events. You can override this to 2750 * intercept all trackball events before they are dispatched to the 2751 * window. Be sure to call this implementation for trackball events 2752 * that should be handled normally. 2753 * 2754 * @param ev The trackball event. 2755 * 2756 * @return boolean Return true if this event was consumed. 2757 */ 2758 public boolean dispatchTrackballEvent(MotionEvent ev) { 2759 onUserInteraction(); 2760 if (getWindow().superDispatchTrackballEvent(ev)) { 2761 return true; 2762 } 2763 return onTrackballEvent(ev); 2764 } 2765 2766 /** 2767 * Called to process generic motion events. You can override this to 2768 * intercept all generic motion events before they are dispatched to the 2769 * window. Be sure to call this implementation for generic motion events 2770 * that should be handled normally. 2771 * 2772 * @param ev The generic motion event. 2773 * 2774 * @return boolean Return true if this event was consumed. 2775 */ 2776 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 2777 onUserInteraction(); 2778 if (getWindow().superDispatchGenericMotionEvent(ev)) { 2779 return true; 2780 } 2781 return onGenericMotionEvent(ev); 2782 } 2783 2784 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2785 event.setClassName(getClass().getName()); 2786 event.setPackageName(getPackageName()); 2787 2788 LayoutParams params = getWindow().getAttributes(); 2789 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2790 (params.height == LayoutParams.MATCH_PARENT); 2791 event.setFullScreen(isFullScreen); 2792 2793 CharSequence title = getTitle(); 2794 if (!TextUtils.isEmpty(title)) { 2795 event.getText().add(title); 2796 } 2797 2798 return true; 2799 } 2800 2801 /** 2802 * Default implementation of 2803 * {@link android.view.Window.Callback#onCreatePanelView} 2804 * for activities. This 2805 * simply returns null so that all panel sub-windows will have the default 2806 * menu behavior. 2807 */ 2808 @Nullable 2809 public View onCreatePanelView(int featureId) { 2810 return null; 2811 } 2812 2813 /** 2814 * Default implementation of 2815 * {@link android.view.Window.Callback#onCreatePanelMenu} 2816 * for activities. This calls through to the new 2817 * {@link #onCreateOptionsMenu} method for the 2818 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2819 * so that subclasses of Activity don't need to deal with feature codes. 2820 */ 2821 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2822 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2823 boolean show = onCreateOptionsMenu(menu); 2824 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 2825 return show; 2826 } 2827 return false; 2828 } 2829 2830 /** 2831 * Default implementation of 2832 * {@link android.view.Window.Callback#onPreparePanel} 2833 * for activities. This 2834 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2835 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2836 * panel, so that subclasses of 2837 * Activity don't need to deal with feature codes. 2838 */ 2839 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2840 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2841 boolean goforit = onPrepareOptionsMenu(menu); 2842 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 2843 return goforit; 2844 } 2845 return true; 2846 } 2847 2848 /** 2849 * {@inheritDoc} 2850 * 2851 * @return The default implementation returns true. 2852 */ 2853 public boolean onMenuOpened(int featureId, Menu menu) { 2854 if (featureId == Window.FEATURE_ACTION_BAR) { 2855 initWindowDecorActionBar(); 2856 if (mActionBar != null) { 2857 mActionBar.dispatchMenuVisibilityChanged(true); 2858 } else { 2859 Log.e(TAG, "Tried to open action bar menu with no action bar"); 2860 } 2861 } 2862 return true; 2863 } 2864 2865 /** 2866 * Default implementation of 2867 * {@link android.view.Window.Callback#onMenuItemSelected} 2868 * for activities. This calls through to the new 2869 * {@link #onOptionsItemSelected} method for the 2870 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2871 * panel, so that subclasses of 2872 * Activity don't need to deal with feature codes. 2873 */ 2874 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2875 CharSequence titleCondensed = item.getTitleCondensed(); 2876 2877 switch (featureId) { 2878 case Window.FEATURE_OPTIONS_PANEL: 2879 // Put event logging here so it gets called even if subclass 2880 // doesn't call through to superclass's implmeentation of each 2881 // of these methods below 2882 if(titleCondensed != null) { 2883 EventLog.writeEvent(50000, 0, titleCondensed.toString()); 2884 } 2885 if (onOptionsItemSelected(item)) { 2886 return true; 2887 } 2888 if (mFragments.dispatchOptionsItemSelected(item)) { 2889 return true; 2890 } 2891 if (item.getItemId() == android.R.id.home && mActionBar != null && 2892 (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) { 2893 if (mParent == null) { 2894 return onNavigateUp(); 2895 } else { 2896 return mParent.onNavigateUpFromChild(this); 2897 } 2898 } 2899 return false; 2900 2901 case Window.FEATURE_CONTEXT_MENU: 2902 if(titleCondensed != null) { 2903 EventLog.writeEvent(50000, 1, titleCondensed.toString()); 2904 } 2905 if (onContextItemSelected(item)) { 2906 return true; 2907 } 2908 return mFragments.dispatchContextItemSelected(item); 2909 2910 default: 2911 return false; 2912 } 2913 } 2914 2915 /** 2916 * Default implementation of 2917 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2918 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2919 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2920 * so that subclasses of Activity don't need to deal with feature codes. 2921 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2922 * {@link #onContextMenuClosed(Menu)} will be called. 2923 */ 2924 public void onPanelClosed(int featureId, Menu menu) { 2925 switch (featureId) { 2926 case Window.FEATURE_OPTIONS_PANEL: 2927 mFragments.dispatchOptionsMenuClosed(menu); 2928 onOptionsMenuClosed(menu); 2929 break; 2930 2931 case Window.FEATURE_CONTEXT_MENU: 2932 onContextMenuClosed(menu); 2933 break; 2934 2935 case Window.FEATURE_ACTION_BAR: 2936 initWindowDecorActionBar(); 2937 mActionBar.dispatchMenuVisibilityChanged(false); 2938 break; 2939 } 2940 } 2941 2942 /** 2943 * Declare that the options menu has changed, so should be recreated. 2944 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 2945 * time it needs to be displayed. 2946 */ 2947 public void invalidateOptionsMenu() { 2948 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 2949 (mActionBar == null || !mActionBar.invalidateOptionsMenu())) { 2950 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 2951 } 2952 } 2953 2954 /** 2955 * Initialize the contents of the Activity's standard options menu. You 2956 * should place your menu items in to <var>menu</var>. 2957 * 2958 * <p>This is only called once, the first time the options menu is 2959 * displayed. To update the menu every time it is displayed, see 2960 * {@link #onPrepareOptionsMenu}. 2961 * 2962 * <p>The default implementation populates the menu with standard system 2963 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2964 * they will be correctly ordered with application-defined menu items. 2965 * Deriving classes should always call through to the base implementation. 2966 * 2967 * <p>You can safely hold on to <var>menu</var> (and any items created 2968 * from it), making modifications to it as desired, until the next 2969 * time onCreateOptionsMenu() is called. 2970 * 2971 * <p>When you add items to the menu, you can implement the Activity's 2972 * {@link #onOptionsItemSelected} method to handle them there. 2973 * 2974 * @param menu The options menu in which you place your items. 2975 * 2976 * @return You must return true for the menu to be displayed; 2977 * if you return false it will not be shown. 2978 * 2979 * @see #onPrepareOptionsMenu 2980 * @see #onOptionsItemSelected 2981 */ 2982 public boolean onCreateOptionsMenu(Menu menu) { 2983 if (mParent != null) { 2984 return mParent.onCreateOptionsMenu(menu); 2985 } 2986 return true; 2987 } 2988 2989 /** 2990 * Prepare the Screen's standard options menu to be displayed. This is 2991 * called right before the menu is shown, every time it is shown. You can 2992 * use this method to efficiently enable/disable items or otherwise 2993 * dynamically modify the contents. 2994 * 2995 * <p>The default implementation updates the system menu items based on the 2996 * activity's state. Deriving classes should always call through to the 2997 * base class implementation. 2998 * 2999 * @param menu The options menu as last shown or first initialized by 3000 * onCreateOptionsMenu(). 3001 * 3002 * @return You must return true for the menu to be displayed; 3003 * if you return false it will not be shown. 3004 * 3005 * @see #onCreateOptionsMenu 3006 */ 3007 public boolean onPrepareOptionsMenu(Menu menu) { 3008 if (mParent != null) { 3009 return mParent.onPrepareOptionsMenu(menu); 3010 } 3011 return true; 3012 } 3013 3014 /** 3015 * This hook is called whenever an item in your options menu is selected. 3016 * The default implementation simply returns false to have the normal 3017 * processing happen (calling the item's Runnable or sending a message to 3018 * its Handler as appropriate). You can use this method for any items 3019 * for which you would like to do processing without those other 3020 * facilities. 3021 * 3022 * <p>Derived classes should call through to the base class for it to 3023 * perform the default menu handling.</p> 3024 * 3025 * @param item The menu item that was selected. 3026 * 3027 * @return boolean Return false to allow normal menu processing to 3028 * proceed, true to consume it here. 3029 * 3030 * @see #onCreateOptionsMenu 3031 */ 3032 public boolean onOptionsItemSelected(MenuItem item) { 3033 if (mParent != null) { 3034 return mParent.onOptionsItemSelected(item); 3035 } 3036 return false; 3037 } 3038 3039 /** 3040 * This method is called whenever the user chooses to navigate Up within your application's 3041 * activity hierarchy from the action bar. 3042 * 3043 * <p>If the attribute {@link android.R.attr#parentActivityName parentActivityName} 3044 * was specified in the manifest for this activity or an activity-alias to it, 3045 * default Up navigation will be handled automatically. If any activity 3046 * along the parent chain requires extra Intent arguments, the Activity subclass 3047 * should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)} 3048 * to supply those arguments.</p> 3049 * 3050 * <p>See <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 3051 * from the developer guide and <a href="{@docRoot}design/patterns/navigation.html">Navigation</a> 3052 * from the design guide for more information about navigating within your app.</p> 3053 * 3054 * <p>See the {@link TaskStackBuilder} class and the Activity methods 3055 * {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and 3056 * {@link #navigateUpTo(Intent)} for help implementing custom Up navigation. 3057 * The AppNavigation sample application in the Android SDK is also available for reference.</p> 3058 * 3059 * @return true if Up navigation completed successfully and this Activity was finished, 3060 * false otherwise. 3061 */ 3062 public boolean onNavigateUp() { 3063 // Automatically handle hierarchical Up navigation if the proper 3064 // metadata is available. 3065 Intent upIntent = getParentActivityIntent(); 3066 if (upIntent != null) { 3067 if (mActivityInfo.taskAffinity == null) { 3068 // Activities with a null affinity are special; they really shouldn't 3069 // specify a parent activity intent in the first place. Just finish 3070 // the current activity and call it a day. 3071 finish(); 3072 } else if (shouldUpRecreateTask(upIntent)) { 3073 TaskStackBuilder b = TaskStackBuilder.create(this); 3074 onCreateNavigateUpTaskStack(b); 3075 onPrepareNavigateUpTaskStack(b); 3076 b.startActivities(); 3077 3078 // We can't finishAffinity if we have a result. 3079 // Fall back and simply finish the current activity instead. 3080 if (mResultCode != RESULT_CANCELED || mResultData != null) { 3081 // Tell the developer what's going on to avoid hair-pulling. 3082 Log.i(TAG, "onNavigateUp only finishing topmost activity to return a result"); 3083 finish(); 3084 } else { 3085 finishAffinity(); 3086 } 3087 } else { 3088 navigateUpTo(upIntent); 3089 } 3090 return true; 3091 } 3092 return false; 3093 } 3094 3095 /** 3096 * This is called when a child activity of this one attempts to navigate up. 3097 * The default implementation simply calls onNavigateUp() on this activity (the parent). 3098 * 3099 * @param child The activity making the call. 3100 */ 3101 public boolean onNavigateUpFromChild(Activity child) { 3102 return onNavigateUp(); 3103 } 3104 3105 /** 3106 * Define the synthetic task stack that will be generated during Up navigation from 3107 * a different task. 3108 * 3109 * <p>The default implementation of this method adds the parent chain of this activity 3110 * as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications 3111 * may choose to override this method to construct the desired task stack in a different 3112 * way.</p> 3113 * 3114 * <p>This method will be invoked by the default implementation of {@link #onNavigateUp()} 3115 * if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent 3116 * returned by {@link #getParentActivityIntent()}.</p> 3117 * 3118 * <p>Applications that wish to supply extra Intent parameters to the parent stack defined 3119 * by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}.</p> 3120 * 3121 * @param builder An empty TaskStackBuilder - the application should add intents representing 3122 * the desired task stack 3123 */ 3124 public void onCreateNavigateUpTaskStack(TaskStackBuilder builder) { 3125 builder.addParentStack(this); 3126 } 3127 3128 /** 3129 * Prepare the synthetic task stack that will be generated during Up navigation 3130 * from a different task. 3131 * 3132 * <p>This method receives the {@link TaskStackBuilder} with the constructed series of 3133 * Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}. 3134 * If any extra data should be added to these intents before launching the new task, 3135 * the application should override this method and add that data here.</p> 3136 * 3137 * @param builder A TaskStackBuilder that has been populated with Intents by 3138 * onCreateNavigateUpTaskStack. 3139 */ 3140 public void onPrepareNavigateUpTaskStack(TaskStackBuilder builder) { 3141 } 3142 3143 /** 3144 * This hook is called whenever the options menu is being closed (either by the user canceling 3145 * the menu with the back/menu button, or when an item is selected). 3146 * 3147 * @param menu The options menu as last shown or first initialized by 3148 * onCreateOptionsMenu(). 3149 */ 3150 public void onOptionsMenuClosed(Menu menu) { 3151 if (mParent != null) { 3152 mParent.onOptionsMenuClosed(menu); 3153 } 3154 } 3155 3156 /** 3157 * Programmatically opens the options menu. If the options menu is already 3158 * open, this method does nothing. 3159 */ 3160 public void openOptionsMenu() { 3161 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL) && 3162 (mActionBar == null || !mActionBar.openOptionsMenu())) { 3163 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 3164 } 3165 } 3166 3167 /** 3168 * Progammatically closes the options menu. If the options menu is already 3169 * closed, this method does nothing. 3170 */ 3171 public void closeOptionsMenu() { 3172 if (mWindow.hasFeature(Window.FEATURE_OPTIONS_PANEL)) { 3173 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 3174 } 3175 } 3176 3177 /** 3178 * Called when a context menu for the {@code view} is about to be shown. 3179 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 3180 * time the context menu is about to be shown and should be populated for 3181 * the view (or item inside the view for {@link AdapterView} subclasses, 3182 * this can be found in the {@code menuInfo})). 3183 * <p> 3184 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 3185 * item has been selected. 3186 * <p> 3187 * It is not safe to hold onto the context menu after this method returns. 3188 * 3189 */ 3190 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 3191 } 3192 3193 /** 3194 * Registers a context menu to be shown for the given view (multiple views 3195 * can show the context menu). This method will set the 3196 * {@link OnCreateContextMenuListener} on the view to this activity, so 3197 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 3198 * called when it is time to show the context menu. 3199 * 3200 * @see #unregisterForContextMenu(View) 3201 * @param view The view that should show a context menu. 3202 */ 3203 public void registerForContextMenu(View view) { 3204 view.setOnCreateContextMenuListener(this); 3205 } 3206 3207 /** 3208 * Prevents a context menu to be shown for the given view. This method will remove the 3209 * {@link OnCreateContextMenuListener} on the view. 3210 * 3211 * @see #registerForContextMenu(View) 3212 * @param view The view that should stop showing a context menu. 3213 */ 3214 public void unregisterForContextMenu(View view) { 3215 view.setOnCreateContextMenuListener(null); 3216 } 3217 3218 /** 3219 * Programmatically opens the context menu for a particular {@code view}. 3220 * The {@code view} should have been added via 3221 * {@link #registerForContextMenu(View)}. 3222 * 3223 * @param view The view to show the context menu for. 3224 */ 3225 public void openContextMenu(View view) { 3226 view.showContextMenu(); 3227 } 3228 3229 /** 3230 * Programmatically closes the most recently opened context menu, if showing. 3231 */ 3232 public void closeContextMenu() { 3233 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 3234 } 3235 3236 /** 3237 * This hook is called whenever an item in a context menu is selected. The 3238 * default implementation simply returns false to have the normal processing 3239 * happen (calling the item's Runnable or sending a message to its Handler 3240 * as appropriate). You can use this method for any items for which you 3241 * would like to do processing without those other facilities. 3242 * <p> 3243 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 3244 * View that added this menu item. 3245 * <p> 3246 * Derived classes should call through to the base class for it to perform 3247 * the default menu handling. 3248 * 3249 * @param item The context menu item that was selected. 3250 * @return boolean Return false to allow normal context menu processing to 3251 * proceed, true to consume it here. 3252 */ 3253 public boolean onContextItemSelected(MenuItem item) { 3254 if (mParent != null) { 3255 return mParent.onContextItemSelected(item); 3256 } 3257 return false; 3258 } 3259 3260 /** 3261 * This hook is called whenever the context menu is being closed (either by 3262 * the user canceling the menu with the back/menu button, or when an item is 3263 * selected). 3264 * 3265 * @param menu The context menu that is being closed. 3266 */ 3267 public void onContextMenuClosed(Menu menu) { 3268 if (mParent != null) { 3269 mParent.onContextMenuClosed(menu); 3270 } 3271 } 3272 3273 /** 3274 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 3275 */ 3276 @Deprecated 3277 protected Dialog onCreateDialog(int id) { 3278 return null; 3279 } 3280 3281 /** 3282 * Callback for creating dialogs that are managed (saved and restored) for you 3283 * by the activity. The default implementation calls through to 3284 * {@link #onCreateDialog(int)} for compatibility. 3285 * 3286 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3287 * or later, consider instead using a {@link DialogFragment} instead.</em> 3288 * 3289 * <p>If you use {@link #showDialog(int)}, the activity will call through to 3290 * this method the first time, and hang onto it thereafter. Any dialog 3291 * that is created by this method will automatically be saved and restored 3292 * for you, including whether it is showing. 3293 * 3294 * <p>If you would like the activity to manage saving and restoring dialogs 3295 * for you, you should override this method and handle any ids that are 3296 * passed to {@link #showDialog}. 3297 * 3298 * <p>If you would like an opportunity to prepare your dialog before it is shown, 3299 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 3300 * 3301 * @param id The id of the dialog. 3302 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3303 * @return The dialog. If you return null, the dialog will not be created. 3304 * 3305 * @see #onPrepareDialog(int, Dialog, Bundle) 3306 * @see #showDialog(int, Bundle) 3307 * @see #dismissDialog(int) 3308 * @see #removeDialog(int) 3309 * 3310 * @deprecated Use the new {@link DialogFragment} class with 3311 * {@link FragmentManager} instead; this is also 3312 * available on older platforms through the Android compatibility package. 3313 */ 3314 @Nullable 3315 @Deprecated 3316 protected Dialog onCreateDialog(int id, Bundle args) { 3317 return onCreateDialog(id); 3318 } 3319 3320 /** 3321 * @deprecated Old no-arguments version of 3322 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 3323 */ 3324 @Deprecated 3325 protected void onPrepareDialog(int id, Dialog dialog) { 3326 dialog.setOwnerActivity(this); 3327 } 3328 3329 /** 3330 * Provides an opportunity to prepare a managed dialog before it is being 3331 * shown. The default implementation calls through to 3332 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 3333 * 3334 * <p> 3335 * Override this if you need to update a managed dialog based on the state 3336 * of the application each time it is shown. For example, a time picker 3337 * dialog might want to be updated with the current time. You should call 3338 * through to the superclass's implementation. The default implementation 3339 * will set this Activity as the owner activity on the Dialog. 3340 * 3341 * @param id The id of the managed dialog. 3342 * @param dialog The dialog. 3343 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3344 * @see #onCreateDialog(int, Bundle) 3345 * @see #showDialog(int) 3346 * @see #dismissDialog(int) 3347 * @see #removeDialog(int) 3348 * 3349 * @deprecated Use the new {@link DialogFragment} class with 3350 * {@link FragmentManager} instead; this is also 3351 * available on older platforms through the Android compatibility package. 3352 */ 3353 @Deprecated 3354 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 3355 onPrepareDialog(id, dialog); 3356 } 3357 3358 /** 3359 * Simple version of {@link #showDialog(int, Bundle)} that does not 3360 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 3361 * with null arguments. 3362 * 3363 * @deprecated Use the new {@link DialogFragment} class with 3364 * {@link FragmentManager} instead; this is also 3365 * available on older platforms through the Android compatibility package. 3366 */ 3367 @Deprecated 3368 public final void showDialog(int id) { 3369 showDialog(id, null); 3370 } 3371 3372 /** 3373 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 3374 * will be made with the same id the first time this is called for a given 3375 * id. From thereafter, the dialog will be automatically saved and restored. 3376 * 3377 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3378 * or later, consider instead using a {@link DialogFragment} instead.</em> 3379 * 3380 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 3381 * be made to provide an opportunity to do any timely preparation. 3382 * 3383 * @param id The id of the managed dialog. 3384 * @param args Arguments to pass through to the dialog. These will be saved 3385 * and restored for you. Note that if the dialog is already created, 3386 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 3387 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 3388 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 3389 * @return Returns true if the Dialog was created; false is returned if 3390 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 3391 * 3392 * @see Dialog 3393 * @see #onCreateDialog(int, Bundle) 3394 * @see #onPrepareDialog(int, Dialog, Bundle) 3395 * @see #dismissDialog(int) 3396 * @see #removeDialog(int) 3397 * 3398 * @deprecated Use the new {@link DialogFragment} class with 3399 * {@link FragmentManager} instead; this is also 3400 * available on older platforms through the Android compatibility package. 3401 */ 3402 @Nullable 3403 @Deprecated 3404 public final boolean showDialog(int id, Bundle args) { 3405 if (mManagedDialogs == null) { 3406 mManagedDialogs = new SparseArray<ManagedDialog>(); 3407 } 3408 ManagedDialog md = mManagedDialogs.get(id); 3409 if (md == null) { 3410 md = new ManagedDialog(); 3411 md.mDialog = createDialog(id, null, args); 3412 if (md.mDialog == null) { 3413 return false; 3414 } 3415 mManagedDialogs.put(id, md); 3416 } 3417 3418 md.mArgs = args; 3419 onPrepareDialog(id, md.mDialog, args); 3420 md.mDialog.show(); 3421 return true; 3422 } 3423 3424 /** 3425 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 3426 * 3427 * @param id The id of the managed dialog. 3428 * 3429 * @throws IllegalArgumentException if the id was not previously shown via 3430 * {@link #showDialog(int)}. 3431 * 3432 * @see #onCreateDialog(int, Bundle) 3433 * @see #onPrepareDialog(int, Dialog, Bundle) 3434 * @see #showDialog(int) 3435 * @see #removeDialog(int) 3436 * 3437 * @deprecated Use the new {@link DialogFragment} class with 3438 * {@link FragmentManager} instead; this is also 3439 * available on older platforms through the Android compatibility package. 3440 */ 3441 @Deprecated 3442 public final void dismissDialog(int id) { 3443 if (mManagedDialogs == null) { 3444 throw missingDialog(id); 3445 } 3446 3447 final ManagedDialog md = mManagedDialogs.get(id); 3448 if (md == null) { 3449 throw missingDialog(id); 3450 } 3451 md.mDialog.dismiss(); 3452 } 3453 3454 /** 3455 * Creates an exception to throw if a user passed in a dialog id that is 3456 * unexpected. 3457 */ 3458 private IllegalArgumentException missingDialog(int id) { 3459 return new IllegalArgumentException("no dialog with id " + id + " was ever " 3460 + "shown via Activity#showDialog"); 3461 } 3462 3463 /** 3464 * Removes any internal references to a dialog managed by this Activity. 3465 * If the dialog is showing, it will dismiss it as part of the clean up. 3466 * 3467 * <p>This can be useful if you know that you will never show a dialog again and 3468 * want to avoid the overhead of saving and restoring it in the future. 3469 * 3470 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 3471 * will not throw an exception if you try to remove an ID that does not 3472 * currently have an associated dialog.</p> 3473 * 3474 * @param id The id of the managed dialog. 3475 * 3476 * @see #onCreateDialog(int, Bundle) 3477 * @see #onPrepareDialog(int, Dialog, Bundle) 3478 * @see #showDialog(int) 3479 * @see #dismissDialog(int) 3480 * 3481 * @deprecated Use the new {@link DialogFragment} class with 3482 * {@link FragmentManager} instead; this is also 3483 * available on older platforms through the Android compatibility package. 3484 */ 3485 @Deprecated 3486 public final void removeDialog(int id) { 3487 if (mManagedDialogs != null) { 3488 final ManagedDialog md = mManagedDialogs.get(id); 3489 if (md != null) { 3490 md.mDialog.dismiss(); 3491 mManagedDialogs.remove(id); 3492 } 3493 } 3494 } 3495 3496 /** 3497 * This hook is called when the user signals the desire to start a search. 3498 * 3499 * <p>You can use this function as a simple way to launch the search UI, in response to a 3500 * menu item, search button, or other widgets within your activity. Unless overidden, 3501 * calling this function is the same as calling 3502 * {@link #startSearch startSearch(null, false, null, false)}, which launches 3503 * search for the current activity as specified in its manifest, see {@link SearchManager}. 3504 * 3505 * <p>You can override this function to force global search, e.g. in response to a dedicated 3506 * search key, or to block search entirely (by simply returning false). 3507 * 3508 * <p>Note: when running in a {@link Configuration#UI_MODE_TYPE_TELEVISION}, the default 3509 * implementation changes to simply return false and you must supply your own custom 3510 * implementation if you want to support search.</p> 3511 * 3512 * @return Returns {@code true} if search launched, and {@code false} if the activity does 3513 * not respond to search. The default implementation always returns {@code true}, except 3514 * when in {@link Configuration#UI_MODE_TYPE_TELEVISION} mode where it returns false. 3515 * 3516 * @see android.app.SearchManager 3517 */ 3518 public boolean onSearchRequested() { 3519 if ((getResources().getConfiguration().uiMode&Configuration.UI_MODE_TYPE_MASK) 3520 != Configuration.UI_MODE_TYPE_TELEVISION) { 3521 startSearch(null, false, null, false); 3522 return true; 3523 } else { 3524 return false; 3525 } 3526 } 3527 3528 /** 3529 * This hook is called to launch the search UI. 3530 * 3531 * <p>It is typically called from onSearchRequested(), either directly from 3532 * Activity.onSearchRequested() or from an overridden version in any given 3533 * Activity. If your goal is simply to activate search, it is preferred to call 3534 * onSearchRequested(), which may have been overridden elsewhere in your Activity. If your goal 3535 * is to inject specific data such as context data, it is preferred to <i>override</i> 3536 * onSearchRequested(), so that any callers to it will benefit from the override. 3537 * 3538 * @param initialQuery Any non-null non-empty string will be inserted as 3539 * pre-entered text in the search query box. 3540 * @param selectInitialQuery If true, the initial query will be preselected, which means that 3541 * any further typing will replace it. This is useful for cases where an entire pre-formed 3542 * query is being inserted. If false, the selection point will be placed at the end of the 3543 * inserted query. This is useful when the inserted query is text that the user entered, 3544 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 3545 * if initialQuery is a non-empty string.</i> 3546 * @param appSearchData An application can insert application-specific 3547 * context here, in order to improve quality or specificity of its own 3548 * searches. This data will be returned with SEARCH intent(s). Null if 3549 * no extra data is required. 3550 * @param globalSearch If false, this will only launch the search that has been specifically 3551 * defined by the application (which is usually defined as a local search). If no default 3552 * search is defined in the current application or activity, global search will be launched. 3553 * If true, this will always launch a platform-global (e.g. web-based) search instead. 3554 * 3555 * @see android.app.SearchManager 3556 * @see #onSearchRequested 3557 */ 3558 public void startSearch(@Nullable String initialQuery, boolean selectInitialQuery, 3559 @Nullable Bundle appSearchData, boolean globalSearch) { 3560 ensureSearchManager(); 3561 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 3562 appSearchData, globalSearch); 3563 } 3564 3565 /** 3566 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 3567 * the search dialog. Made available for testing purposes. 3568 * 3569 * @param query The query to trigger. If empty, the request will be ignored. 3570 * @param appSearchData An application can insert application-specific 3571 * context here, in order to improve quality or specificity of its own 3572 * searches. This data will be returned with SEARCH intent(s). Null if 3573 * no extra data is required. 3574 */ 3575 public void triggerSearch(String query, @Nullable Bundle appSearchData) { 3576 ensureSearchManager(); 3577 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 3578 } 3579 3580 /** 3581 * Request that key events come to this activity. Use this if your 3582 * activity has no views with focus, but the activity still wants 3583 * a chance to process key events. 3584 * 3585 * @see android.view.Window#takeKeyEvents 3586 */ 3587 public void takeKeyEvents(boolean get) { 3588 getWindow().takeKeyEvents(get); 3589 } 3590 3591 /** 3592 * Enable extended window features. This is a convenience for calling 3593 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 3594 * 3595 * @param featureId The desired feature as defined in 3596 * {@link android.view.Window}. 3597 * @return Returns true if the requested feature is supported and now 3598 * enabled. 3599 * 3600 * @see android.view.Window#requestFeature 3601 */ 3602 public final boolean requestWindowFeature(int featureId) { 3603 return getWindow().requestFeature(featureId); 3604 } 3605 3606 /** 3607 * Convenience for calling 3608 * {@link android.view.Window#setFeatureDrawableResource}. 3609 */ 3610 public final void setFeatureDrawableResource(int featureId, int resId) { 3611 getWindow().setFeatureDrawableResource(featureId, resId); 3612 } 3613 3614 /** 3615 * Convenience for calling 3616 * {@link android.view.Window#setFeatureDrawableUri}. 3617 */ 3618 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3619 getWindow().setFeatureDrawableUri(featureId, uri); 3620 } 3621 3622 /** 3623 * Convenience for calling 3624 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3625 */ 3626 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3627 getWindow().setFeatureDrawable(featureId, drawable); 3628 } 3629 3630 /** 3631 * Convenience for calling 3632 * {@link android.view.Window#setFeatureDrawableAlpha}. 3633 */ 3634 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3635 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3636 } 3637 3638 /** 3639 * Convenience for calling 3640 * {@link android.view.Window#getLayoutInflater}. 3641 */ 3642 @NonNull 3643 public LayoutInflater getLayoutInflater() { 3644 return getWindow().getLayoutInflater(); 3645 } 3646 3647 /** 3648 * Returns a {@link MenuInflater} with this context. 3649 */ 3650 @NonNull 3651 public MenuInflater getMenuInflater() { 3652 // Make sure that action views can get an appropriate theme. 3653 if (mMenuInflater == null) { 3654 initWindowDecorActionBar(); 3655 if (mActionBar != null) { 3656 mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this); 3657 } else { 3658 mMenuInflater = new MenuInflater(this); 3659 } 3660 } 3661 return mMenuInflater; 3662 } 3663 3664 @Override 3665 protected void onApplyThemeResource(Resources.Theme theme, int resid, 3666 boolean first) { 3667 if (mParent == null) { 3668 super.onApplyThemeResource(theme, resid, first); 3669 } else { 3670 try { 3671 theme.setTo(mParent.getTheme()); 3672 } catch (Exception e) { 3673 // Empty 3674 } 3675 theme.applyStyle(resid, false); 3676 } 3677 3678 // Get the primary color and update the TaskDescription for this activity 3679 if (theme != null) { 3680 TypedArray a = theme.obtainStyledAttributes(com.android.internal.R.styleable.Theme); 3681 int colorPrimary = a.getColor(com.android.internal.R.styleable.Theme_colorPrimary, 0); 3682 a.recycle(); 3683 if (colorPrimary != 0) { 3684 ActivityManager.TaskDescription v = new ActivityManager.TaskDescription(null, null, 3685 colorPrimary); 3686 setTaskDescription(v); 3687 } 3688 } 3689 } 3690 3691 /** 3692 * Same as calling {@link #startActivityForResult(Intent, int, Bundle)} 3693 * with no options. 3694 * 3695 * @param intent The intent to start. 3696 * @param requestCode If >= 0, this code will be returned in 3697 * onActivityResult() when the activity exits. 3698 * 3699 * @throws android.content.ActivityNotFoundException 3700 * 3701 * @see #startActivity 3702 */ 3703 public void startActivityForResult(Intent intent, int requestCode) { 3704 startActivityForResult(intent, requestCode, null); 3705 } 3706 3707 /** 3708 * Launch an activity for which you would like a result when it finished. 3709 * When this activity exits, your 3710 * onActivityResult() method will be called with the given requestCode. 3711 * Using a negative requestCode is the same as calling 3712 * {@link #startActivity} (the activity is not launched as a sub-activity). 3713 * 3714 * <p>Note that this method should only be used with Intent protocols 3715 * that are defined to return a result. In other protocols (such as 3716 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 3717 * not get the result when you expect. For example, if the activity you 3718 * are launching uses the singleTask launch mode, it will not run in your 3719 * task and thus you will immediately receive a cancel result. 3720 * 3721 * <p>As a special case, if you call startActivityForResult() with a requestCode 3722 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 3723 * activity, then your window will not be displayed until a result is 3724 * returned back from the started activity. This is to avoid visible 3725 * flickering when redirecting to another activity. 3726 * 3727 * <p>This method throws {@link android.content.ActivityNotFoundException} 3728 * if there was no Activity found to run the given Intent. 3729 * 3730 * @param intent The intent to start. 3731 * @param requestCode If >= 0, this code will be returned in 3732 * onActivityResult() when the activity exits. 3733 * @param options Additional options for how the Activity should be started. 3734 * See {@link android.content.Context#startActivity(Intent, Bundle) 3735 * Context.startActivity(Intent, Bundle)} for more details. 3736 * 3737 * @throws android.content.ActivityNotFoundException 3738 * 3739 * @see #startActivity 3740 */ 3741 public void startActivityForResult(Intent intent, int requestCode, @Nullable Bundle options) { 3742 if (mParent == null) { 3743 Instrumentation.ActivityResult ar = 3744 mInstrumentation.execStartActivity( 3745 this, mMainThread.getApplicationThread(), mToken, this, 3746 intent, requestCode, options); 3747 if (ar != null) { 3748 mMainThread.sendActivityResult( 3749 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 3750 ar.getResultData()); 3751 } 3752 if (requestCode >= 0) { 3753 // If this start is requesting a result, we can avoid making 3754 // the activity visible until the result is received. Setting 3755 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3756 // activity hidden during this time, to avoid flickering. 3757 // This can only be done when a result is requested because 3758 // that guarantees we will get information back when the 3759 // activity is finished, no matter what happens to it. 3760 mStartedActivity = true; 3761 } 3762 3763 final View decor = mWindow != null ? mWindow.peekDecorView() : null; 3764 if (decor != null) { 3765 decor.cancelPendingInputEvents(); 3766 } 3767 // TODO Consider clearing/flushing other event sources and events for child windows. 3768 } else { 3769 if (options != null) { 3770 mParent.startActivityFromChild(this, intent, requestCode, options); 3771 } else { 3772 // Note we want to go through this method for compatibility with 3773 // existing applications that may have overridden it. 3774 mParent.startActivityFromChild(this, intent, requestCode); 3775 } 3776 } 3777 if (options != null && !isTopOfTask()) { 3778 mActivityTransitionState.startExitOutTransition(this, options); 3779 } 3780 } 3781 3782 /** 3783 * @hide Implement to provide correct calling token. 3784 */ 3785 public void startActivityForResultAsUser(Intent intent, int requestCode, UserHandle user) { 3786 startActivityForResultAsUser(intent, requestCode, null, user); 3787 } 3788 3789 /** 3790 * @hide Implement to provide correct calling token. 3791 */ 3792 public void startActivityForResultAsUser(Intent intent, int requestCode, 3793 @Nullable Bundle options, UserHandle user) { 3794 if (options != null) { 3795 mActivityTransitionState.startExitOutTransition(this, options); 3796 } 3797 if (mParent != null) { 3798 throw new RuntimeException("Can't be called from a child"); 3799 } 3800 Instrumentation.ActivityResult ar = mInstrumentation.execStartActivity( 3801 this, mMainThread.getApplicationThread(), mToken, this, intent, requestCode, 3802 options, user); 3803 if (ar != null) { 3804 mMainThread.sendActivityResult( 3805 mToken, mEmbeddedID, requestCode, ar.getResultCode(), ar.getResultData()); 3806 } 3807 if (requestCode >= 0) { 3808 // If this start is requesting a result, we can avoid making 3809 // the activity visible until the result is received. Setting 3810 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3811 // activity hidden during this time, to avoid flickering. 3812 // This can only be done when a result is requested because 3813 // that guarantees we will get information back when the 3814 // activity is finished, no matter what happens to it. 3815 mStartedActivity = true; 3816 } 3817 3818 final View decor = mWindow != null ? mWindow.peekDecorView() : null; 3819 if (decor != null) { 3820 decor.cancelPendingInputEvents(); 3821 } 3822 } 3823 3824 /** 3825 * @hide Implement to provide correct calling token. 3826 */ 3827 public void startActivityAsUser(Intent intent, UserHandle user) { 3828 startActivityAsUser(intent, null, user); 3829 } 3830 3831 /** 3832 * @hide Implement to provide correct calling token. 3833 */ 3834 public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) { 3835 if (mParent != null) { 3836 throw new RuntimeException("Can't be called from a child"); 3837 } 3838 Instrumentation.ActivityResult ar = 3839 mInstrumentation.execStartActivity( 3840 this, mMainThread.getApplicationThread(), mToken, this, 3841 intent, -1, options, user); 3842 if (ar != null) { 3843 mMainThread.sendActivityResult( 3844 mToken, mEmbeddedID, -1, ar.getResultCode(), 3845 ar.getResultData()); 3846 } 3847 } 3848 3849 /** 3850 * Start a new activity as if it was started by the activity that started our 3851 * current activity. This is for the resolver and chooser activities, which operate 3852 * as intermediaries that dispatch their intent to the target the user selects -- to 3853 * do this, they must perform all security checks including permission grants as if 3854 * their launch had come from the original activity. 3855 * @hide 3856 */ 3857 public void startActivityAsCaller(Intent intent, @Nullable Bundle options, int userId) { 3858 if (mParent != null) { 3859 throw new RuntimeException("Can't be called from a child"); 3860 } 3861 Instrumentation.ActivityResult ar = 3862 mInstrumentation.execStartActivityAsCaller( 3863 this, mMainThread.getApplicationThread(), mToken, this, 3864 intent, -1, options, userId); 3865 if (ar != null) { 3866 mMainThread.sendActivityResult( 3867 mToken, mEmbeddedID, -1, ar.getResultCode(), 3868 ar.getResultData()); 3869 } 3870 } 3871 3872 /** 3873 * Same as calling {@link #startIntentSenderForResult(IntentSender, int, 3874 * Intent, int, int, int, Bundle)} with no options. 3875 * 3876 * @param intent The IntentSender to launch. 3877 * @param requestCode If >= 0, this code will be returned in 3878 * onActivityResult() when the activity exits. 3879 * @param fillInIntent If non-null, this will be provided as the 3880 * intent parameter to {@link IntentSender#sendIntent}. 3881 * @param flagsMask Intent flags in the original IntentSender that you 3882 * would like to change. 3883 * @param flagsValues Desired values for any bits set in 3884 * <var>flagsMask</var> 3885 * @param extraFlags Always set to 0. 3886 */ 3887 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3888 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3889 throws IntentSender.SendIntentException { 3890 startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, 3891 flagsValues, extraFlags, null); 3892 } 3893 3894 /** 3895 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 3896 * to use a IntentSender to describe the activity to be started. If 3897 * the IntentSender is for an activity, that activity will be started 3898 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 3899 * here; otherwise, its associated action will be executed (such as 3900 * sending a broadcast) as if you had called 3901 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 3902 * 3903 * @param intent The IntentSender to launch. 3904 * @param requestCode If >= 0, this code will be returned in 3905 * onActivityResult() when the activity exits. 3906 * @param fillInIntent If non-null, this will be provided as the 3907 * intent parameter to {@link IntentSender#sendIntent}. 3908 * @param flagsMask Intent flags in the original IntentSender that you 3909 * would like to change. 3910 * @param flagsValues Desired values for any bits set in 3911 * <var>flagsMask</var> 3912 * @param extraFlags Always set to 0. 3913 * @param options Additional options for how the Activity should be started. 3914 * See {@link android.content.Context#startActivity(Intent, Bundle) 3915 * Context.startActivity(Intent, Bundle)} for more details. If options 3916 * have also been supplied by the IntentSender, options given here will 3917 * override any that conflict with those given by the IntentSender. 3918 */ 3919 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3920 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 3921 Bundle options) throws IntentSender.SendIntentException { 3922 if (mParent == null) { 3923 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3924 flagsMask, flagsValues, this, options); 3925 } else if (options != null) { 3926 mParent.startIntentSenderFromChild(this, intent, requestCode, 3927 fillInIntent, flagsMask, flagsValues, extraFlags, options); 3928 } else { 3929 // Note we want to go through this call for compatibility with 3930 // existing applications that may have overridden the method. 3931 mParent.startIntentSenderFromChild(this, intent, requestCode, 3932 fillInIntent, flagsMask, flagsValues, extraFlags); 3933 } 3934 } 3935 3936 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 3937 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity, 3938 Bundle options) 3939 throws IntentSender.SendIntentException { 3940 try { 3941 String resolvedType = null; 3942 if (fillInIntent != null) { 3943 fillInIntent.migrateExtraStreamToClipData(); 3944 fillInIntent.prepareToLeaveProcess(); 3945 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 3946 } 3947 int result = ActivityManagerNative.getDefault() 3948 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 3949 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 3950 requestCode, flagsMask, flagsValues, options); 3951 if (result == ActivityManager.START_CANCELED) { 3952 throw new IntentSender.SendIntentException(); 3953 } 3954 Instrumentation.checkStartActivityResult(result, null); 3955 } catch (RemoteException e) { 3956 } 3957 if (requestCode >= 0) { 3958 // If this start is requesting a result, we can avoid making 3959 // the activity visible until the result is received. Setting 3960 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3961 // activity hidden during this time, to avoid flickering. 3962 // This can only be done when a result is requested because 3963 // that guarantees we will get information back when the 3964 // activity is finished, no matter what happens to it. 3965 mStartedActivity = true; 3966 } 3967 } 3968 3969 /** 3970 * Same as {@link #startActivity(Intent, Bundle)} with no options 3971 * specified. 3972 * 3973 * @param intent The intent to start. 3974 * 3975 * @throws android.content.ActivityNotFoundException 3976 * 3977 * @see {@link #startActivity(Intent, Bundle)} 3978 * @see #startActivityForResult 3979 */ 3980 @Override 3981 public void startActivity(Intent intent) { 3982 this.startActivity(intent, null); 3983 } 3984 3985 /** 3986 * Launch a new activity. You will not receive any information about when 3987 * the activity exits. This implementation overrides the base version, 3988 * providing information about 3989 * the activity performing the launch. Because of this additional 3990 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3991 * required; if not specified, the new activity will be added to the 3992 * task of the caller. 3993 * 3994 * <p>This method throws {@link android.content.ActivityNotFoundException} 3995 * if there was no Activity found to run the given Intent. 3996 * 3997 * @param intent The intent to start. 3998 * @param options Additional options for how the Activity should be started. 3999 * See {@link android.content.Context#startActivity(Intent, Bundle) 4000 * Context.startActivity(Intent, Bundle)} for more details. 4001 * 4002 * @throws android.content.ActivityNotFoundException 4003 * 4004 * @see {@link #startActivity(Intent)} 4005 * @see #startActivityForResult 4006 */ 4007 @Override 4008 public void startActivity(Intent intent, @Nullable Bundle options) { 4009 if (options != null) { 4010 startActivityForResult(intent, -1, options); 4011 } else { 4012 // Note we want to go through this call for compatibility with 4013 // applications that may have overridden the method. 4014 startActivityForResult(intent, -1); 4015 } 4016 } 4017 4018 /** 4019 * Same as {@link #startActivities(Intent[], Bundle)} with no options 4020 * specified. 4021 * 4022 * @param intents The intents to start. 4023 * 4024 * @throws android.content.ActivityNotFoundException 4025 * 4026 * @see {@link #startActivities(Intent[], Bundle)} 4027 * @see #startActivityForResult 4028 */ 4029 @Override 4030 public void startActivities(Intent[] intents) { 4031 startActivities(intents, null); 4032 } 4033 4034 /** 4035 * Launch a new activity. You will not receive any information about when 4036 * the activity exits. This implementation overrides the base version, 4037 * providing information about 4038 * the activity performing the launch. Because of this additional 4039 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 4040 * required; if not specified, the new activity will be added to the 4041 * task of the caller. 4042 * 4043 * <p>This method throws {@link android.content.ActivityNotFoundException} 4044 * if there was no Activity found to run the given Intent. 4045 * 4046 * @param intents The intents to start. 4047 * @param options Additional options for how the Activity should be started. 4048 * See {@link android.content.Context#startActivity(Intent, Bundle) 4049 * Context.startActivity(Intent, Bundle)} for more details. 4050 * 4051 * @throws android.content.ActivityNotFoundException 4052 * 4053 * @see {@link #startActivities(Intent[])} 4054 * @see #startActivityForResult 4055 */ 4056 @Override 4057 public void startActivities(Intent[] intents, @Nullable Bundle options) { 4058 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 4059 mToken, this, intents, options); 4060 } 4061 4062 /** 4063 * Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 4064 * with no options. 4065 * 4066 * @param intent The IntentSender to launch. 4067 * @param fillInIntent If non-null, this will be provided as the 4068 * intent parameter to {@link IntentSender#sendIntent}. 4069 * @param flagsMask Intent flags in the original IntentSender that you 4070 * would like to change. 4071 * @param flagsValues Desired values for any bits set in 4072 * <var>flagsMask</var> 4073 * @param extraFlags Always set to 0. 4074 */ 4075 public void startIntentSender(IntentSender intent, 4076 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 4077 throws IntentSender.SendIntentException { 4078 startIntentSender(intent, fillInIntent, flagsMask, flagsValues, 4079 extraFlags, null); 4080 } 4081 4082 /** 4083 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 4084 * to start; see 4085 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)} 4086 * for more information. 4087 * 4088 * @param intent The IntentSender to launch. 4089 * @param fillInIntent If non-null, this will be provided as the 4090 * intent parameter to {@link IntentSender#sendIntent}. 4091 * @param flagsMask Intent flags in the original IntentSender that you 4092 * would like to change. 4093 * @param flagsValues Desired values for any bits set in 4094 * <var>flagsMask</var> 4095 * @param extraFlags Always set to 0. 4096 * @param options Additional options for how the Activity should be started. 4097 * See {@link android.content.Context#startActivity(Intent, Bundle) 4098 * Context.startActivity(Intent, Bundle)} for more details. If options 4099 * have also been supplied by the IntentSender, options given here will 4100 * override any that conflict with those given by the IntentSender. 4101 */ 4102 public void startIntentSender(IntentSender intent, 4103 @Nullable Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 4104 Bundle options) throws IntentSender.SendIntentException { 4105 if (options != null) { 4106 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4107 flagsValues, extraFlags, options); 4108 } else { 4109 // Note we want to go through this call for compatibility with 4110 // applications that may have overridden the method. 4111 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 4112 flagsValues, extraFlags); 4113 } 4114 } 4115 4116 /** 4117 * Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)} 4118 * with no options. 4119 * 4120 * @param intent The intent to start. 4121 * @param requestCode If >= 0, this code will be returned in 4122 * onActivityResult() when the activity exits, as described in 4123 * {@link #startActivityForResult}. 4124 * 4125 * @return If a new activity was launched then true is returned; otherwise 4126 * false is returned and you must handle the Intent yourself. 4127 * 4128 * @see #startActivity 4129 * @see #startActivityForResult 4130 */ 4131 public boolean startActivityIfNeeded(@NonNull Intent intent, int requestCode) { 4132 return startActivityIfNeeded(intent, requestCode, null); 4133 } 4134 4135 /** 4136 * A special variation to launch an activity only if a new activity 4137 * instance is needed to handle the given Intent. In other words, this is 4138 * just like {@link #startActivityForResult(Intent, int)} except: if you are 4139 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 4140 * singleTask or singleTop 4141 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 4142 * and the activity 4143 * that handles <var>intent</var> is the same as your currently running 4144 * activity, then a new instance is not needed. In this case, instead of 4145 * the normal behavior of calling {@link #onNewIntent} this function will 4146 * return and you can handle the Intent yourself. 4147 * 4148 * <p>This function can only be called from a top-level activity; if it is 4149 * called from a child activity, a runtime exception will be thrown. 4150 * 4151 * @param intent The intent to start. 4152 * @param requestCode If >= 0, this code will be returned in 4153 * onActivityResult() when the activity exits, as described in 4154 * {@link #startActivityForResult}. 4155 * @param options Additional options for how the Activity should be started. 4156 * See {@link android.content.Context#startActivity(Intent, Bundle) 4157 * Context.startActivity(Intent, Bundle)} for more details. 4158 * 4159 * @return If a new activity was launched then true is returned; otherwise 4160 * false is returned and you must handle the Intent yourself. 4161 * 4162 * @see #startActivity 4163 * @see #startActivityForResult 4164 */ 4165 public boolean startActivityIfNeeded(@NonNull Intent intent, int requestCode, 4166 @Nullable Bundle options) { 4167 if (mParent == null) { 4168 int result = ActivityManager.START_RETURN_INTENT_TO_CALLER; 4169 try { 4170 intent.migrateExtraStreamToClipData(); 4171 intent.prepareToLeaveProcess(); 4172 result = ActivityManagerNative.getDefault() 4173 .startActivity(mMainThread.getApplicationThread(), getBasePackageName(), 4174 intent, intent.resolveTypeIfNeeded(getContentResolver()), mToken, 4175 mEmbeddedID, requestCode, ActivityManager.START_FLAG_ONLY_IF_NEEDED, 4176 null, options); 4177 } catch (RemoteException e) { 4178 // Empty 4179 } 4180 4181 Instrumentation.checkStartActivityResult(result, intent); 4182 4183 if (requestCode >= 0) { 4184 // If this start is requesting a result, we can avoid making 4185 // the activity visible until the result is received. Setting 4186 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 4187 // activity hidden during this time, to avoid flickering. 4188 // This can only be done when a result is requested because 4189 // that guarantees we will get information back when the 4190 // activity is finished, no matter what happens to it. 4191 mStartedActivity = true; 4192 } 4193 return result != ActivityManager.START_RETURN_INTENT_TO_CALLER; 4194 } 4195 4196 throw new UnsupportedOperationException( 4197 "startActivityIfNeeded can only be called from a top-level activity"); 4198 } 4199 4200 /** 4201 * Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with 4202 * no options. 4203 * 4204 * @param intent The intent to dispatch to the next activity. For 4205 * correct behavior, this must be the same as the Intent that started 4206 * your own activity; the only changes you can make are to the extras 4207 * inside of it. 4208 * 4209 * @return Returns a boolean indicating whether there was another Activity 4210 * to start: true if there was a next activity to start, false if there 4211 * wasn't. In general, if true is returned you will then want to call 4212 * finish() on yourself. 4213 */ 4214 public boolean startNextMatchingActivity(@NonNull Intent intent) { 4215 return startNextMatchingActivity(intent, null); 4216 } 4217 4218 /** 4219 * Special version of starting an activity, for use when you are replacing 4220 * other activity components. You can use this to hand the Intent off 4221 * to the next Activity that can handle it. You typically call this in 4222 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 4223 * 4224 * @param intent The intent to dispatch to the next activity. For 4225 * correct behavior, this must be the same as the Intent that started 4226 * your own activity; the only changes you can make are to the extras 4227 * inside of it. 4228 * @param options Additional options for how the Activity should be started. 4229 * See {@link android.content.Context#startActivity(Intent, Bundle) 4230 * Context.startActivity(Intent, Bundle)} for more details. 4231 * 4232 * @return Returns a boolean indicating whether there was another Activity 4233 * to start: true if there was a next activity to start, false if there 4234 * wasn't. In general, if true is returned you will then want to call 4235 * finish() on yourself. 4236 */ 4237 public boolean startNextMatchingActivity(@NonNull Intent intent, @Nullable Bundle options) { 4238 if (mParent == null) { 4239 try { 4240 intent.migrateExtraStreamToClipData(); 4241 intent.prepareToLeaveProcess(); 4242 return ActivityManagerNative.getDefault() 4243 .startNextMatchingActivity(mToken, intent, options); 4244 } catch (RemoteException e) { 4245 // Empty 4246 } 4247 return false; 4248 } 4249 4250 throw new UnsupportedOperationException( 4251 "startNextMatchingActivity can only be called from a top-level activity"); 4252 } 4253 4254 /** 4255 * Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)} 4256 * with no options. 4257 * 4258 * @param child The activity making the call. 4259 * @param intent The intent to start. 4260 * @param requestCode Reply request code. < 0 if reply is not requested. 4261 * 4262 * @throws android.content.ActivityNotFoundException 4263 * 4264 * @see #startActivity 4265 * @see #startActivityForResult 4266 */ 4267 public void startActivityFromChild(@NonNull Activity child, Intent intent, 4268 int requestCode) { 4269 startActivityFromChild(child, intent, requestCode, null); 4270 } 4271 4272 /** 4273 * This is called when a child activity of this one calls its 4274 * {@link #startActivity} or {@link #startActivityForResult} method. 4275 * 4276 * <p>This method throws {@link android.content.ActivityNotFoundException} 4277 * if there was no Activity found to run the given Intent. 4278 * 4279 * @param child The activity making the call. 4280 * @param intent The intent to start. 4281 * @param requestCode Reply request code. < 0 if reply is not requested. 4282 * @param options Additional options for how the Activity should be started. 4283 * See {@link android.content.Context#startActivity(Intent, Bundle) 4284 * Context.startActivity(Intent, Bundle)} for more details. 4285 * 4286 * @throws android.content.ActivityNotFoundException 4287 * 4288 * @see #startActivity 4289 * @see #startActivityForResult 4290 */ 4291 public void startActivityFromChild(@NonNull Activity child, Intent intent, 4292 int requestCode, @Nullable Bundle options) { 4293 Instrumentation.ActivityResult ar = 4294 mInstrumentation.execStartActivity( 4295 this, mMainThread.getApplicationThread(), mToken, child, 4296 intent, requestCode, options); 4297 if (ar != null) { 4298 mMainThread.sendActivityResult( 4299 mToken, child.mEmbeddedID, requestCode, 4300 ar.getResultCode(), ar.getResultData()); 4301 } 4302 } 4303 4304 /** 4305 * Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)} 4306 * with no options. 4307 * 4308 * @param fragment The fragment making the call. 4309 * @param intent The intent to start. 4310 * @param requestCode Reply request code. < 0 if reply is not requested. 4311 * 4312 * @throws android.content.ActivityNotFoundException 4313 * 4314 * @see Fragment#startActivity 4315 * @see Fragment#startActivityForResult 4316 */ 4317 public void startActivityFromFragment(@NonNull Fragment fragment, Intent intent, 4318 int requestCode) { 4319 startActivityFromFragment(fragment, intent, requestCode, null); 4320 } 4321 4322 /** 4323 * This is called when a Fragment in this activity calls its 4324 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 4325 * method. 4326 * 4327 * <p>This method throws {@link android.content.ActivityNotFoundException} 4328 * if there was no Activity found to run the given Intent. 4329 * 4330 * @param fragment The fragment making the call. 4331 * @param intent The intent to start. 4332 * @param requestCode Reply request code. < 0 if reply is not requested. 4333 * @param options Additional options for how the Activity should be started. 4334 * See {@link android.content.Context#startActivity(Intent, Bundle) 4335 * Context.startActivity(Intent, Bundle)} for more details. 4336 * 4337 * @throws android.content.ActivityNotFoundException 4338 * 4339 * @see Fragment#startActivity 4340 * @see Fragment#startActivityForResult 4341 */ 4342 public void startActivityFromFragment(@NonNull Fragment fragment, Intent intent, 4343 int requestCode, @Nullable Bundle options) { 4344 if (options != null) { 4345 mActivityTransitionState.startExitOutTransition(this, options); 4346 } 4347 Instrumentation.ActivityResult ar = 4348 mInstrumentation.execStartActivity( 4349 this, mMainThread.getApplicationThread(), mToken, fragment, 4350 intent, requestCode, options); 4351 if (ar != null) { 4352 mMainThread.sendActivityResult( 4353 mToken, fragment.mWho, requestCode, 4354 ar.getResultCode(), ar.getResultData()); 4355 } 4356 } 4357 4358 /** 4359 * Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender, 4360 * int, Intent, int, int, int, Bundle)} with no options. 4361 */ 4362 public void startIntentSenderFromChild(Activity child, IntentSender intent, 4363 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 4364 int extraFlags) 4365 throws IntentSender.SendIntentException { 4366 startIntentSenderFromChild(child, intent, requestCode, fillInIntent, 4367 flagsMask, flagsValues, extraFlags, null); 4368 } 4369 4370 /** 4371 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 4372 * taking a IntentSender; see 4373 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 4374 * for more information. 4375 */ 4376 public void startIntentSenderFromChild(Activity child, IntentSender intent, 4377 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 4378 int extraFlags, @Nullable Bundle options) 4379 throws IntentSender.SendIntentException { 4380 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 4381 flagsMask, flagsValues, child, options); 4382 } 4383 4384 /** 4385 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 4386 * or {@link #finish} to specify an explicit transition animation to 4387 * perform next. 4388 * 4389 * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative 4390 * to using this with starting activities is to supply the desired animation 4391 * information through a {@link ActivityOptions} bundle to 4392 * {@link #startActivity(Intent, Bundle) or a related function. This allows 4393 * you to specify a custom animation even when starting an activity from 4394 * outside the context of the current top activity. 4395 * 4396 * @param enterAnim A resource ID of the animation resource to use for 4397 * the incoming activity. Use 0 for no animation. 4398 * @param exitAnim A resource ID of the animation resource to use for 4399 * the outgoing activity. Use 0 for no animation. 4400 */ 4401 public void overridePendingTransition(int enterAnim, int exitAnim) { 4402 try { 4403 ActivityManagerNative.getDefault().overridePendingTransition( 4404 mToken, getPackageName(), enterAnim, exitAnim); 4405 } catch (RemoteException e) { 4406 } 4407 } 4408 4409 /** 4410 * Call this to set the result that your activity will return to its 4411 * caller. 4412 * 4413 * @param resultCode The result code to propagate back to the originating 4414 * activity, often RESULT_CANCELED or RESULT_OK 4415 * 4416 * @see #RESULT_CANCELED 4417 * @see #RESULT_OK 4418 * @see #RESULT_FIRST_USER 4419 * @see #setResult(int, Intent) 4420 */ 4421 public final void setResult(int resultCode) { 4422 synchronized (this) { 4423 mResultCode = resultCode; 4424 mResultData = null; 4425 } 4426 } 4427 4428 /** 4429 * Call this to set the result that your activity will return to its 4430 * caller. 4431 * 4432 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 4433 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 4434 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 4435 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 4436 * Activity receiving the result access to the specific URIs in the Intent. 4437 * Access will remain until the Activity has finished (it will remain across the hosting 4438 * process being killed and other temporary destruction) and will be added 4439 * to any existing set of URI permissions it already holds. 4440 * 4441 * @param resultCode The result code to propagate back to the originating 4442 * activity, often RESULT_CANCELED or RESULT_OK 4443 * @param data The data to propagate back to the originating activity. 4444 * 4445 * @see #RESULT_CANCELED 4446 * @see #RESULT_OK 4447 * @see #RESULT_FIRST_USER 4448 * @see #setResult(int) 4449 */ 4450 public final void setResult(int resultCode, Intent data) { 4451 synchronized (this) { 4452 mResultCode = resultCode; 4453 mResultData = data; 4454 } 4455 } 4456 4457 /** 4458 * Return information about who launched this activity. If the launching Intent 4459 * contains an {@link android.content.Intent#EXTRA_REFERRER Intent.EXTRA_REFERRER}, 4460 * that will be returned as-is; otherwise, if known, an 4461 * {@link Intent#URI_ANDROID_APP_SCHEME android-app:} referrer URI containing the 4462 * package name that started the Intent will be returned. This may return null if no 4463 * referrer can be identified -- it is neither explicitly specified, nor is it known which 4464 * application package was involved. 4465 * 4466 * <p>If called while inside the handling of {@link #onNewIntent}, this function will 4467 * return the referrer that submitted that new intent to the activity. Otherwise, it 4468 * always returns the referrer of the original Intent.</p> 4469 * 4470 * <p>Note that this is <em>not</em> a security feature -- you can not trust the 4471 * referrer information, applications can spoof it.</p> 4472 */ 4473 @Nullable 4474 public Uri getReferrer() { 4475 Intent intent = getIntent(); 4476 Uri referrer = intent.getParcelableExtra(Intent.EXTRA_REFERRER); 4477 if (referrer != null) { 4478 return referrer; 4479 } 4480 String referrerName = intent.getStringExtra(Intent.EXTRA_REFERRER_NAME); 4481 if (referrerName != null) { 4482 return Uri.parse(referrerName); 4483 } 4484 if (mReferrer != null) { 4485 return new Uri.Builder().scheme("android-app").authority(mReferrer).build(); 4486 } 4487 return null; 4488 } 4489 4490 /** 4491 * Return the name of the package that invoked this activity. This is who 4492 * the data in {@link #setResult setResult()} will be sent to. You can 4493 * use this information to validate that the recipient is allowed to 4494 * receive the data. 4495 * 4496 * <p class="note">Note: if the calling activity is not expecting a result (that is it 4497 * did not use the {@link #startActivityForResult} 4498 * form that includes a request code), then the calling package will be 4499 * null.</p> 4500 * 4501 * <p class="note">Note: prior to {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, 4502 * the result from this method was unstable. If the process hosting the calling 4503 * package was no longer running, it would return null instead of the proper package 4504 * name. You can use {@link #getCallingActivity()} and retrieve the package name 4505 * from that instead.</p> 4506 * 4507 * @return The package of the activity that will receive your 4508 * reply, or null if none. 4509 */ 4510 @Nullable 4511 public String getCallingPackage() { 4512 try { 4513 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 4514 } catch (RemoteException e) { 4515 return null; 4516 } 4517 } 4518 4519 /** 4520 * Return the name of the activity that invoked this activity. This is 4521 * who the data in {@link #setResult setResult()} will be sent to. You 4522 * can use this information to validate that the recipient is allowed to 4523 * receive the data. 4524 * 4525 * <p class="note">Note: if the calling activity is not expecting a result (that is it 4526 * did not use the {@link #startActivityForResult} 4527 * form that includes a request code), then the calling package will be 4528 * null. 4529 * 4530 * @return The ComponentName of the activity that will receive your 4531 * reply, or null if none. 4532 */ 4533 @Nullable 4534 public ComponentName getCallingActivity() { 4535 try { 4536 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 4537 } catch (RemoteException e) { 4538 return null; 4539 } 4540 } 4541 4542 /** 4543 * Control whether this activity's main window is visible. This is intended 4544 * only for the special case of an activity that is not going to show a 4545 * UI itself, but can't just finish prior to onResume() because it needs 4546 * to wait for a service binding or such. Setting this to false allows 4547 * you to prevent your UI from being shown during that time. 4548 * 4549 * <p>The default value for this is taken from the 4550 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 4551 */ 4552 public void setVisible(boolean visible) { 4553 if (mVisibleFromClient != visible) { 4554 mVisibleFromClient = visible; 4555 if (mVisibleFromServer) { 4556 if (visible) makeVisible(); 4557 else mDecor.setVisibility(View.INVISIBLE); 4558 } 4559 } 4560 } 4561 4562 void makeVisible() { 4563 if (!mWindowAdded) { 4564 ViewManager wm = getWindowManager(); 4565 wm.addView(mDecor, getWindow().getAttributes()); 4566 mWindowAdded = true; 4567 } 4568 mDecor.setVisibility(View.VISIBLE); 4569 } 4570 4571 /** 4572 * Check to see whether this activity is in the process of finishing, 4573 * either because you called {@link #finish} on it or someone else 4574 * has requested that it finished. This is often used in 4575 * {@link #onPause} to determine whether the activity is simply pausing or 4576 * completely finishing. 4577 * 4578 * @return If the activity is finishing, returns true; else returns false. 4579 * 4580 * @see #finish 4581 */ 4582 public boolean isFinishing() { 4583 return mFinished; 4584 } 4585 4586 /** 4587 * Returns true if the final {@link #onDestroy()} call has been made 4588 * on the Activity, so this instance is now dead. 4589 */ 4590 public boolean isDestroyed() { 4591 return mDestroyed; 4592 } 4593 4594 /** 4595 * Check to see whether this activity is in the process of being destroyed in order to be 4596 * recreated with a new configuration. This is often used in 4597 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 4598 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 4599 * 4600 * @return If the activity is being torn down in order to be recreated with a new configuration, 4601 * returns true; else returns false. 4602 */ 4603 public boolean isChangingConfigurations() { 4604 return mChangingConfigurations; 4605 } 4606 4607 /** 4608 * Cause this Activity to be recreated with a new instance. This results 4609 * in essentially the same flow as when the Activity is created due to 4610 * a configuration change -- the current instance will go through its 4611 * lifecycle to {@link #onDestroy} and a new instance then created after it. 4612 */ 4613 public void recreate() { 4614 if (mParent != null) { 4615 throw new IllegalStateException("Can only be called on top-level activity"); 4616 } 4617 if (Looper.myLooper() != mMainThread.getLooper()) { 4618 throw new IllegalStateException("Must be called from main thread"); 4619 } 4620 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, false); 4621 } 4622 4623 /** 4624 * Finishes the current activity and specifies whether to remove the task associated with this 4625 * activity. 4626 */ 4627 private void finish(boolean finishTask) { 4628 if (mParent == null) { 4629 int resultCode; 4630 Intent resultData; 4631 synchronized (this) { 4632 resultCode = mResultCode; 4633 resultData = mResultData; 4634 } 4635 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 4636 try { 4637 if (resultData != null) { 4638 resultData.prepareToLeaveProcess(); 4639 } 4640 if (ActivityManagerNative.getDefault() 4641 .finishActivity(mToken, resultCode, resultData, finishTask)) { 4642 mFinished = true; 4643 } 4644 } catch (RemoteException e) { 4645 // Empty 4646 } 4647 } else { 4648 mParent.finishFromChild(this); 4649 } 4650 } 4651 4652 /** 4653 * Call this when your activity is done and should be closed. The 4654 * ActivityResult is propagated back to whoever launched you via 4655 * onActivityResult(). 4656 */ 4657 public void finish() { 4658 finish(false); 4659 } 4660 4661 /** 4662 * Finish this activity as well as all activities immediately below it 4663 * in the current task that have the same affinity. This is typically 4664 * used when an application can be launched on to another task (such as 4665 * from an ACTION_VIEW of a content type it understands) and the user 4666 * has used the up navigation to switch out of the current task and in 4667 * to its own task. In this case, if the user has navigated down into 4668 * any other activities of the second application, all of those should 4669 * be removed from the original task as part of the task switch. 4670 * 4671 * <p>Note that this finish does <em>not</em> allow you to deliver results 4672 * to the previous activity, and an exception will be thrown if you are trying 4673 * to do so.</p> 4674 */ 4675 public void finishAffinity() { 4676 if (mParent != null) { 4677 throw new IllegalStateException("Can not be called from an embedded activity"); 4678 } 4679 if (mResultCode != RESULT_CANCELED || mResultData != null) { 4680 throw new IllegalStateException("Can not be called to deliver a result"); 4681 } 4682 try { 4683 if (ActivityManagerNative.getDefault().finishActivityAffinity(mToken)) { 4684 mFinished = true; 4685 } 4686 } catch (RemoteException e) { 4687 // Empty 4688 } 4689 } 4690 4691 /** 4692 * This is called when a child activity of this one calls its 4693 * {@link #finish} method. The default implementation simply calls 4694 * finish() on this activity (the parent), finishing the entire group. 4695 * 4696 * @param child The activity making the call. 4697 * 4698 * @see #finish 4699 */ 4700 public void finishFromChild(Activity child) { 4701 finish(); 4702 } 4703 4704 /** 4705 * Reverses the Activity Scene entry Transition and triggers the calling Activity 4706 * to reverse its exit Transition. When the exit Transition completes, 4707 * {@link #finish()} is called. If no entry Transition was used, finish() is called 4708 * immediately and the Activity exit Transition is run. 4709 * @see android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, android.util.Pair[]) 4710 */ 4711 public void finishAfterTransition() { 4712 if (!mActivityTransitionState.startExitBackTransition(this)) { 4713 finish(); 4714 } 4715 } 4716 4717 /** 4718 * Force finish another activity that you had previously started with 4719 * {@link #startActivityForResult}. 4720 * 4721 * @param requestCode The request code of the activity that you had 4722 * given to startActivityForResult(). If there are multiple 4723 * activities started with this request code, they 4724 * will all be finished. 4725 */ 4726 public void finishActivity(int requestCode) { 4727 if (mParent == null) { 4728 try { 4729 ActivityManagerNative.getDefault() 4730 .finishSubActivity(mToken, mEmbeddedID, requestCode); 4731 } catch (RemoteException e) { 4732 // Empty 4733 } 4734 } else { 4735 mParent.finishActivityFromChild(this, requestCode); 4736 } 4737 } 4738 4739 /** 4740 * This is called when a child activity of this one calls its 4741 * finishActivity(). 4742 * 4743 * @param child The activity making the call. 4744 * @param requestCode Request code that had been used to start the 4745 * activity. 4746 */ 4747 public void finishActivityFromChild(@NonNull Activity child, int requestCode) { 4748 try { 4749 ActivityManagerNative.getDefault() 4750 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 4751 } catch (RemoteException e) { 4752 // Empty 4753 } 4754 } 4755 4756 /** 4757 * Call this when your activity is done and should be closed and the task should be completely 4758 * removed as a part of finishing the Activity. 4759 */ 4760 public void finishAndRemoveTask() { 4761 finish(true); 4762 } 4763 4764 /** 4765 * Ask that the local app instance of this activity be released to free up its memory. 4766 * This is asking for the activity to be destroyed, but does <b>not</b> finish the activity -- 4767 * a new instance of the activity will later be re-created if needed due to the user 4768 * navigating back to it. 4769 * 4770 * @return Returns true if the activity was in a state that it has started the process 4771 * of destroying its current instance; returns false if for any reason this could not 4772 * be done: it is currently visible to the user, it is already being destroyed, it is 4773 * being finished, it hasn't yet saved its state, etc. 4774 */ 4775 public boolean releaseInstance() { 4776 try { 4777 return ActivityManagerNative.getDefault().releaseActivityInstance(mToken); 4778 } catch (RemoteException e) { 4779 // Empty 4780 } 4781 return false; 4782 } 4783 4784 /** 4785 * Called when an activity you launched exits, giving you the requestCode 4786 * you started it with, the resultCode it returned, and any additional 4787 * data from it. The <var>resultCode</var> will be 4788 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 4789 * didn't return any result, or crashed during its operation. 4790 * 4791 * <p>You will receive this call immediately before onResume() when your 4792 * activity is re-starting. 4793 * 4794 * <p>This method is never invoked if your activity sets 4795 * {@link android.R.styleable#AndroidManifestActivity_noHistory noHistory} to 4796 * <code>true</code>. 4797 * 4798 * @param requestCode The integer request code originally supplied to 4799 * startActivityForResult(), allowing you to identify who this 4800 * result came from. 4801 * @param resultCode The integer result code returned by the child activity 4802 * through its setResult(). 4803 * @param data An Intent, which can return result data to the caller 4804 * (various data can be attached to Intent "extras"). 4805 * 4806 * @see #startActivityForResult 4807 * @see #createPendingResult 4808 * @see #setResult(int) 4809 */ 4810 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 4811 } 4812 4813 /** 4814 * Called when an activity you launched with an activity transition exposes this 4815 * Activity through a returning activity transition, giving you the resultCode 4816 * and any additional data from it. This method will only be called if the activity 4817 * set a result code other than {@link #RESULT_CANCELED} and it supports activity 4818 * transitions with {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 4819 * 4820 * <p>The purpose of this function is to let the called Activity send a hint about 4821 * its state so that this underlying Activity can prepare to be exposed. A call to 4822 * this method does not guarantee that the called Activity has or will be exiting soon. 4823 * It only indicates that it will expose this Activity's Window and it has 4824 * some data to pass to prepare it.</p> 4825 * 4826 * @param resultCode The integer result code returned by the child activity 4827 * through its setResult(). 4828 * @param data An Intent, which can return result data to the caller 4829 * (various data can be attached to Intent "extras"). 4830 */ 4831 public void onActivityReenter(int resultCode, Intent data) { 4832 } 4833 4834 /** 4835 * Create a new PendingIntent object which you can hand to others 4836 * for them to use to send result data back to your 4837 * {@link #onActivityResult} callback. The created object will be either 4838 * one-shot (becoming invalid after a result is sent back) or multiple 4839 * (allowing any number of results to be sent through it). 4840 * 4841 * @param requestCode Private request code for the sender that will be 4842 * associated with the result data when it is returned. The sender can not 4843 * modify this value, allowing you to identify incoming results. 4844 * @param data Default data to supply in the result, which may be modified 4845 * by the sender. 4846 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 4847 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 4848 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 4849 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 4850 * or any of the flags as supported by 4851 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 4852 * of the intent that can be supplied when the actual send happens. 4853 * 4854 * @return Returns an existing or new PendingIntent matching the given 4855 * parameters. May return null only if 4856 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 4857 * supplied. 4858 * 4859 * @see PendingIntent 4860 */ 4861 public PendingIntent createPendingResult(int requestCode, @NonNull Intent data, 4862 @PendingIntent.Flags int flags) { 4863 String packageName = getPackageName(); 4864 try { 4865 data.prepareToLeaveProcess(); 4866 IIntentSender target = 4867 ActivityManagerNative.getDefault().getIntentSender( 4868 ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 4869 mParent == null ? mToken : mParent.mToken, 4870 mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null, 4871 UserHandle.myUserId()); 4872 return target != null ? new PendingIntent(target) : null; 4873 } catch (RemoteException e) { 4874 // Empty 4875 } 4876 return null; 4877 } 4878 4879 /** 4880 * Change the desired orientation of this activity. If the activity 4881 * is currently in the foreground or otherwise impacting the screen 4882 * orientation, the screen will immediately be changed (possibly causing 4883 * the activity to be restarted). Otherwise, this will be used the next 4884 * time the activity is visible. 4885 * 4886 * @param requestedOrientation An orientation constant as used in 4887 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 4888 */ 4889 public void setRequestedOrientation(@ActivityInfo.ScreenOrientation int requestedOrientation) { 4890 if (mParent == null) { 4891 try { 4892 ActivityManagerNative.getDefault().setRequestedOrientation( 4893 mToken, requestedOrientation); 4894 } catch (RemoteException e) { 4895 // Empty 4896 } 4897 } else { 4898 mParent.setRequestedOrientation(requestedOrientation); 4899 } 4900 } 4901 4902 /** 4903 * Return the current requested orientation of the activity. This will 4904 * either be the orientation requested in its component's manifest, or 4905 * the last requested orientation given to 4906 * {@link #setRequestedOrientation(int)}. 4907 * 4908 * @return Returns an orientation constant as used in 4909 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 4910 */ 4911 @ActivityInfo.ScreenOrientation 4912 public int getRequestedOrientation() { 4913 if (mParent == null) { 4914 try { 4915 return ActivityManagerNative.getDefault() 4916 .getRequestedOrientation(mToken); 4917 } catch (RemoteException e) { 4918 // Empty 4919 } 4920 } else { 4921 return mParent.getRequestedOrientation(); 4922 } 4923 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 4924 } 4925 4926 /** 4927 * Return the identifier of the task this activity is in. This identifier 4928 * will remain the same for the lifetime of the activity. 4929 * 4930 * @return Task identifier, an opaque integer. 4931 */ 4932 public int getTaskId() { 4933 try { 4934 return ActivityManagerNative.getDefault() 4935 .getTaskForActivity(mToken, false); 4936 } catch (RemoteException e) { 4937 return -1; 4938 } 4939 } 4940 4941 /** 4942 * Return whether this activity is the root of a task. The root is the 4943 * first activity in a task. 4944 * 4945 * @return True if this is the root activity, else false. 4946 */ 4947 public boolean isTaskRoot() { 4948 try { 4949 return ActivityManagerNative.getDefault() 4950 .getTaskForActivity(mToken, true) >= 0; 4951 } catch (RemoteException e) { 4952 return false; 4953 } 4954 } 4955 4956 /** 4957 * Move the task containing this activity to the back of the activity 4958 * stack. The activity's order within the task is unchanged. 4959 * 4960 * @param nonRoot If false then this only works if the activity is the root 4961 * of a task; if true it will work for any activity in 4962 * a task. 4963 * 4964 * @return If the task was moved (or it was already at the 4965 * back) true is returned, else false. 4966 */ 4967 public boolean moveTaskToBack(boolean nonRoot) { 4968 try { 4969 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 4970 mToken, nonRoot); 4971 } catch (RemoteException e) { 4972 // Empty 4973 } 4974 return false; 4975 } 4976 4977 /** 4978 * Returns class name for this activity with the package prefix removed. 4979 * This is the default name used to read and write settings. 4980 * 4981 * @return The local class name. 4982 */ 4983 @NonNull 4984 public String getLocalClassName() { 4985 final String pkg = getPackageName(); 4986 final String cls = mComponent.getClassName(); 4987 int packageLen = pkg.length(); 4988 if (!cls.startsWith(pkg) || cls.length() <= packageLen 4989 || cls.charAt(packageLen) != '.') { 4990 return cls; 4991 } 4992 return cls.substring(packageLen+1); 4993 } 4994 4995 /** 4996 * Returns complete component name of this activity. 4997 * 4998 * @return Returns the complete component name for this activity 4999 */ 5000 public ComponentName getComponentName() 5001 { 5002 return mComponent; 5003 } 5004 5005 /** 5006 * Retrieve a {@link SharedPreferences} object for accessing preferences 5007 * that are private to this activity. This simply calls the underlying 5008 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 5009 * class name as the preferences name. 5010 * 5011 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 5012 * operation, {@link #MODE_WORLD_READABLE} and 5013 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 5014 * 5015 * @return Returns the single SharedPreferences instance that can be used 5016 * to retrieve and modify the preference values. 5017 */ 5018 public SharedPreferences getPreferences(int mode) { 5019 return getSharedPreferences(getLocalClassName(), mode); 5020 } 5021 5022 private void ensureSearchManager() { 5023 if (mSearchManager != null) { 5024 return; 5025 } 5026 5027 mSearchManager = new SearchManager(this, null); 5028 } 5029 5030 @Override 5031 public Object getSystemService(@ServiceName @NonNull String name) { 5032 if (getBaseContext() == null) { 5033 throw new IllegalStateException( 5034 "System services not available to Activities before onCreate()"); 5035 } 5036 5037 if (WINDOW_SERVICE.equals(name)) { 5038 return mWindowManager; 5039 } else if (SEARCH_SERVICE.equals(name)) { 5040 ensureSearchManager(); 5041 return mSearchManager; 5042 } 5043 return super.getSystemService(name); 5044 } 5045 5046 /** 5047 * Change the title associated with this activity. If this is a 5048 * top-level activity, the title for its window will change. If it 5049 * is an embedded activity, the parent can do whatever it wants 5050 * with it. 5051 */ 5052 public void setTitle(CharSequence title) { 5053 mTitle = title; 5054 onTitleChanged(title, mTitleColor); 5055 5056 if (mParent != null) { 5057 mParent.onChildTitleChanged(this, title); 5058 } 5059 } 5060 5061 /** 5062 * Change the title associated with this activity. If this is a 5063 * top-level activity, the title for its window will change. If it 5064 * is an embedded activity, the parent can do whatever it wants 5065 * with it. 5066 */ 5067 public void setTitle(int titleId) { 5068 setTitle(getText(titleId)); 5069 } 5070 5071 /** 5072 * Change the color of the title associated with this activity. 5073 * <p> 5074 * This method is deprecated starting in API Level 11 and replaced by action 5075 * bar styles. For information on styling the Action Bar, read the <a 5076 * href="{@docRoot} guide/topics/ui/actionbar.html">Action Bar</a> developer 5077 * guide. 5078 * 5079 * @deprecated Use action bar styles instead. 5080 */ 5081 @Deprecated 5082 public void setTitleColor(int textColor) { 5083 mTitleColor = textColor; 5084 onTitleChanged(mTitle, textColor); 5085 } 5086 5087 public final CharSequence getTitle() { 5088 return mTitle; 5089 } 5090 5091 public final int getTitleColor() { 5092 return mTitleColor; 5093 } 5094 5095 protected void onTitleChanged(CharSequence title, int color) { 5096 if (mTitleReady) { 5097 final Window win = getWindow(); 5098 if (win != null) { 5099 win.setTitle(title); 5100 if (color != 0) { 5101 win.setTitleColor(color); 5102 } 5103 } 5104 if (mActionBar != null) { 5105 mActionBar.setWindowTitle(title); 5106 } 5107 } 5108 } 5109 5110 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 5111 } 5112 5113 /** 5114 * Sets information describing the task with this activity for presentation inside the Recents 5115 * System UI. When {@link ActivityManager#getRecentTasks} is called, the activities of each task 5116 * are traversed in order from the topmost activity to the bottommost. The traversal continues 5117 * for each property until a suitable value is found. For each task the taskDescription will be 5118 * returned in {@link android.app.ActivityManager.TaskDescription}. 5119 * 5120 * @see ActivityManager#getRecentTasks 5121 * @see android.app.ActivityManager.TaskDescription 5122 * 5123 * @param taskDescription The TaskDescription properties that describe the task with this activity 5124 */ 5125 public void setTaskDescription(ActivityManager.TaskDescription taskDescription) { 5126 ActivityManager.TaskDescription td; 5127 // Scale the icon down to something reasonable if it is provided 5128 if (taskDescription.getIconFilename() == null && taskDescription.getIcon() != null) { 5129 final int size = ActivityManager.getLauncherLargeIconSizeInner(this); 5130 final Bitmap icon = Bitmap.createScaledBitmap(taskDescription.getIcon(), size, size, true); 5131 td = new ActivityManager.TaskDescription(taskDescription.getLabel(), icon, 5132 taskDescription.getPrimaryColor()); 5133 } else { 5134 td = taskDescription; 5135 } 5136 try { 5137 ActivityManagerNative.getDefault().setTaskDescription(mToken, td); 5138 } catch (RemoteException e) { 5139 } 5140 } 5141 5142 /** 5143 * Sets the visibility of the progress bar in the title. 5144 * <p> 5145 * In order for the progress bar to be shown, the feature must be requested 5146 * via {@link #requestWindowFeature(int)}. 5147 * 5148 * @param visible Whether to show the progress bars in the title. 5149 */ 5150 public final void setProgressBarVisibility(boolean visible) { 5151 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 5152 Window.PROGRESS_VISIBILITY_OFF); 5153 } 5154 5155 /** 5156 * Sets the visibility of the indeterminate progress bar in the title. 5157 * <p> 5158 * In order for the progress bar to be shown, the feature must be requested 5159 * via {@link #requestWindowFeature(int)}. 5160 * 5161 * @param visible Whether to show the progress bars in the title. 5162 */ 5163 public final void setProgressBarIndeterminateVisibility(boolean visible) { 5164 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 5165 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 5166 } 5167 5168 /** 5169 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 5170 * is always indeterminate). 5171 * <p> 5172 * In order for the progress bar to be shown, the feature must be requested 5173 * via {@link #requestWindowFeature(int)}. 5174 * 5175 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 5176 */ 5177 public final void setProgressBarIndeterminate(boolean indeterminate) { 5178 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 5179 indeterminate ? Window.PROGRESS_INDETERMINATE_ON 5180 : Window.PROGRESS_INDETERMINATE_OFF); 5181 } 5182 5183 /** 5184 * Sets the progress for the progress bars in the title. 5185 * <p> 5186 * In order for the progress bar to be shown, the feature must be requested 5187 * via {@link #requestWindowFeature(int)}. 5188 * 5189 * @param progress The progress for the progress bar. Valid ranges are from 5190 * 0 to 10000 (both inclusive). If 10000 is given, the progress 5191 * bar will be completely filled and will fade out. 5192 */ 5193 public final void setProgress(int progress) { 5194 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 5195 } 5196 5197 /** 5198 * Sets the secondary progress for the progress bar in the title. This 5199 * progress is drawn between the primary progress (set via 5200 * {@link #setProgress(int)} and the background. It can be ideal for media 5201 * scenarios such as showing the buffering progress while the default 5202 * progress shows the play progress. 5203 * <p> 5204 * In order for the progress bar to be shown, the feature must be requested 5205 * via {@link #requestWindowFeature(int)}. 5206 * 5207 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 5208 * 0 to 10000 (both inclusive). 5209 */ 5210 public final void setSecondaryProgress(int secondaryProgress) { 5211 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 5212 secondaryProgress + Window.PROGRESS_SECONDARY_START); 5213 } 5214 5215 /** 5216 * Suggests an audio stream whose volume should be changed by the hardware 5217 * volume controls. 5218 * <p> 5219 * The suggested audio stream will be tied to the window of this Activity. 5220 * Volume requests which are received while the Activity is in the 5221 * foreground will affect this stream. 5222 * <p> 5223 * It is not guaranteed that the hardware volume controls will always change 5224 * this stream's volume (for example, if a call is in progress, its stream's 5225 * volume may be changed instead). To reset back to the default, use 5226 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 5227 * 5228 * @param streamType The type of the audio stream whose volume should be 5229 * changed by the hardware volume controls. 5230 */ 5231 public final void setVolumeControlStream(int streamType) { 5232 getWindow().setVolumeControlStream(streamType); 5233 } 5234 5235 /** 5236 * Gets the suggested audio stream whose volume should be changed by the 5237 * hardware volume controls. 5238 * 5239 * @return The suggested audio stream type whose volume should be changed by 5240 * the hardware volume controls. 5241 * @see #setVolumeControlStream(int) 5242 */ 5243 public final int getVolumeControlStream() { 5244 return getWindow().getVolumeControlStream(); 5245 } 5246 5247 /** 5248 * Sets a {@link MediaController} to send media keys and volume changes to. 5249 * <p> 5250 * The controller will be tied to the window of this Activity. Media key and 5251 * volume events which are received while the Activity is in the foreground 5252 * will be forwarded to the controller and used to invoke transport controls 5253 * or adjust the volume. This may be used instead of or in addition to 5254 * {@link #setVolumeControlStream} to affect a specific session instead of a 5255 * specific stream. 5256 * <p> 5257 * It is not guaranteed that the hardware volume controls will always change 5258 * this session's volume (for example, if a call is in progress, its 5259 * stream's volume may be changed instead). To reset back to the default use 5260 * null as the controller. 5261 * 5262 * @param controller The controller for the session which should receive 5263 * media keys and volume changes. 5264 */ 5265 public final void setMediaController(MediaController controller) { 5266 getWindow().setMediaController(controller); 5267 } 5268 5269 /** 5270 * Gets the controller which should be receiving media key and volume events 5271 * while this activity is in the foreground. 5272 * 5273 * @return The controller which should receive events. 5274 * @see #setMediaController(android.media.session.MediaController) 5275 */ 5276 public final MediaController getMediaController() { 5277 return getWindow().getMediaController(); 5278 } 5279 5280 /** 5281 * Runs the specified action on the UI thread. If the current thread is the UI 5282 * thread, then the action is executed immediately. If the current thread is 5283 * not the UI thread, the action is posted to the event queue of the UI thread. 5284 * 5285 * @param action the action to run on the UI thread 5286 */ 5287 public final void runOnUiThread(Runnable action) { 5288 if (Thread.currentThread() != mUiThread) { 5289 mHandler.post(action); 5290 } else { 5291 action.run(); 5292 } 5293 } 5294 5295 /** 5296 * Standard implementation of 5297 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 5298 * inflating with the LayoutInflater returned by {@link #getSystemService}. 5299 * This implementation does nothing and is for 5300 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 5301 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 5302 * 5303 * @see android.view.LayoutInflater#createView 5304 * @see android.view.Window#getLayoutInflater 5305 */ 5306 @Nullable 5307 public View onCreateView(String name, Context context, AttributeSet attrs) { 5308 return null; 5309 } 5310 5311 /** 5312 * Standard implementation of 5313 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 5314 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 5315 * This implementation handles <fragment> tags to embed fragments inside 5316 * of the activity. 5317 * 5318 * @see android.view.LayoutInflater#createView 5319 * @see android.view.Window#getLayoutInflater 5320 */ 5321 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 5322 if (!"fragment".equals(name)) { 5323 return onCreateView(name, context, attrs); 5324 } 5325 5326 return mFragments.onCreateView(parent, name, context, attrs); 5327 } 5328 5329 /** 5330 * Print the Activity's state into the given stream. This gets invoked if 5331 * you run "adb shell dumpsys activity <activity_component_name>". 5332 * 5333 * @param prefix Desired prefix to prepend at each line of output. 5334 * @param fd The raw file descriptor that the dump is being sent to. 5335 * @param writer The PrintWriter to which you should dump your state. This will be 5336 * closed for you after you return. 5337 * @param args additional arguments to the dump request. 5338 */ 5339 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 5340 dumpInner(prefix, fd, writer, args); 5341 } 5342 5343 void dumpInner(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 5344 writer.print(prefix); writer.print("Local Activity "); 5345 writer.print(Integer.toHexString(System.identityHashCode(this))); 5346 writer.println(" State:"); 5347 String innerPrefix = prefix + " "; 5348 writer.print(innerPrefix); writer.print("mResumed="); 5349 writer.print(mResumed); writer.print(" mStopped="); 5350 writer.print(mStopped); writer.print(" mFinished="); 5351 writer.println(mFinished); 5352 writer.print(innerPrefix); writer.print("mLoadersStarted="); 5353 writer.println(mLoadersStarted); 5354 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 5355 writer.println(mChangingConfigurations); 5356 writer.print(innerPrefix); writer.print("mCurrentConfig="); 5357 writer.println(mCurrentConfig); 5358 5359 if (mLoaderManager != null) { 5360 writer.print(prefix); writer.print("Loader Manager "); 5361 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 5362 writer.println(":"); 5363 mLoaderManager.dump(prefix + " ", fd, writer, args); 5364 } 5365 5366 mFragments.dump(prefix, fd, writer, args); 5367 5368 if (getWindow() != null && 5369 getWindow().peekDecorView() != null && 5370 getWindow().peekDecorView().getViewRootImpl() != null) { 5371 getWindow().peekDecorView().getViewRootImpl().dump(prefix, fd, writer, args); 5372 } 5373 5374 mHandler.getLooper().dump(new PrintWriterPrinter(writer), prefix); 5375 } 5376 5377 /** 5378 * Bit indicating that this activity is "immersive" and should not be 5379 * interrupted by notifications if possible. 5380 * 5381 * This value is initially set by the manifest property 5382 * <code>android:immersive</code> but may be changed at runtime by 5383 * {@link #setImmersive}. 5384 * 5385 * @see #setImmersive(boolean) 5386 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 5387 */ 5388 public boolean isImmersive() { 5389 try { 5390 return ActivityManagerNative.getDefault().isImmersive(mToken); 5391 } catch (RemoteException e) { 5392 return false; 5393 } 5394 } 5395 5396 /** 5397 * Indication of whether this is the highest level activity in this task. Can be used to 5398 * determine whether an activity launched by this activity was placed in the same task or 5399 * another task. 5400 * 5401 * @return true if this is the topmost, non-finishing activity in its task. 5402 */ 5403 private boolean isTopOfTask() { 5404 try { 5405 return ActivityManagerNative.getDefault().isTopOfTask(mToken); 5406 } catch (RemoteException e) { 5407 return false; 5408 } 5409 } 5410 5411 /** 5412 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} to a 5413 * fullscreen opaque Activity. 5414 * <p> 5415 * Call this whenever the background of a translucent Activity has changed to become opaque. 5416 * Doing so will allow the {@link android.view.Surface} of the Activity behind to be released. 5417 * <p> 5418 * This call has no effect on non-translucent activities or on activities with the 5419 * {@link android.R.attr#windowIsFloating} attribute. 5420 * 5421 * @see #convertToTranslucent(android.app.Activity.TranslucentConversionListener, 5422 * ActivityOptions) 5423 * @see TranslucentConversionListener 5424 * 5425 * @hide 5426 */ 5427 @SystemApi 5428 public void convertFromTranslucent() { 5429 try { 5430 mTranslucentCallback = null; 5431 if (ActivityManagerNative.getDefault().convertFromTranslucent(mToken)) { 5432 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, true); 5433 } 5434 } catch (RemoteException e) { 5435 // pass 5436 } 5437 } 5438 5439 /** 5440 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} back from 5441 * opaque to translucent following a call to {@link #convertFromTranslucent()}. 5442 * <p> 5443 * Calling this allows the Activity behind this one to be seen again. Once all such Activities 5444 * have been redrawn {@link TranslucentConversionListener#onTranslucentConversionComplete} will 5445 * be called indicating that it is safe to make this activity translucent again. Until 5446 * {@link TranslucentConversionListener#onTranslucentConversionComplete} is called the image 5447 * behind the frontmost Activity will be indeterminate. 5448 * <p> 5449 * This call has no effect on non-translucent activities or on activities with the 5450 * {@link android.R.attr#windowIsFloating} attribute. 5451 * 5452 * @param callback the method to call when all visible Activities behind this one have been 5453 * drawn and it is safe to make this Activity translucent again. 5454 * @param options activity options delivered to the activity below this one. The options 5455 * are retrieved using {@link #getActivityOptions}. 5456 * @return <code>true</code> if Window was opaque and will become translucent or 5457 * <code>false</code> if window was translucent and no change needed to be made. 5458 * 5459 * @see #convertFromTranslucent() 5460 * @see TranslucentConversionListener 5461 * 5462 * @hide 5463 */ 5464 @SystemApi 5465 public boolean convertToTranslucent(TranslucentConversionListener callback, 5466 ActivityOptions options) { 5467 boolean drawComplete; 5468 try { 5469 mTranslucentCallback = callback; 5470 mChangeCanvasToTranslucent = 5471 ActivityManagerNative.getDefault().convertToTranslucent(mToken, options); 5472 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 5473 drawComplete = true; 5474 } catch (RemoteException e) { 5475 // Make callback return as though it timed out. 5476 mChangeCanvasToTranslucent = false; 5477 drawComplete = false; 5478 } 5479 if (!mChangeCanvasToTranslucent && mTranslucentCallback != null) { 5480 // Window is already translucent. 5481 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 5482 } 5483 return mChangeCanvasToTranslucent; 5484 } 5485 5486 /** @hide */ 5487 void onTranslucentConversionComplete(boolean drawComplete) { 5488 if (mTranslucentCallback != null) { 5489 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 5490 mTranslucentCallback = null; 5491 } 5492 if (mChangeCanvasToTranslucent) { 5493 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 5494 } 5495 } 5496 5497 /** @hide */ 5498 public void onNewActivityOptions(ActivityOptions options) { 5499 mActivityTransitionState.setEnterActivityOptions(this, options); 5500 if (!mStopped) { 5501 mActivityTransitionState.enterReady(this); 5502 } 5503 } 5504 5505 /** 5506 * Retrieve the ActivityOptions passed in from the launching activity or passed back 5507 * from an activity launched by this activity in its call to {@link 5508 * #convertToTranslucent(TranslucentConversionListener, ActivityOptions)} 5509 * 5510 * @return The ActivityOptions passed to {@link #convertToTranslucent}. 5511 * @hide 5512 */ 5513 ActivityOptions getActivityOptions() { 5514 try { 5515 return ActivityManagerNative.getDefault().getActivityOptions(mToken); 5516 } catch (RemoteException e) { 5517 } 5518 return null; 5519 } 5520 5521 /** 5522 * Activities that want to remain visible behind a translucent activity above them must call 5523 * this method anytime between the start of {@link #onResume()} and the return from 5524 * {@link #onPause()}. If this call is successful then the activity will remain visible after 5525 * {@link #onPause()} is called, and is allowed to continue playing media in the background. 5526 * 5527 * <p>The actions of this call are reset each time that this activity is brought to the 5528 * front. That is, every time {@link #onResume()} is called the activity will be assumed 5529 * to not have requested visible behind. Therefore, if you want this activity to continue to 5530 * be visible in the background you must call this method again. 5531 * 5532 * <p>Only fullscreen opaque activities may make this call. I.e. this call is a nop 5533 * for dialog and translucent activities. 5534 * 5535 * <p>Under all circumstances, the activity must stop playing and release resources prior to or 5536 * within a call to {@link #onVisibleBehindCanceled()} or if this call returns false. 5537 * 5538 * <p>False will be returned any time this method is called between the return of onPause and 5539 * the next call to onResume. 5540 * 5541 * @param visible true to notify the system that the activity wishes to be visible behind other 5542 * translucent activities, false to indicate otherwise. Resources must be 5543 * released when passing false to this method. 5544 * @return the resulting visibiity state. If true the activity will remain visible beyond 5545 * {@link #onPause()} if the next activity is translucent or not fullscreen. If false 5546 * then the activity may not count on being visible behind other translucent activities, 5547 * and must stop any media playback and release resources. 5548 * Returning false may occur in lieu of a call to {@link #onVisibleBehindCanceled()} so 5549 * the return value must be checked. 5550 * 5551 * @see #onVisibleBehindCanceled() 5552 * @see #onBackgroundVisibleBehindChanged(boolean) 5553 */ 5554 public boolean requestVisibleBehind(boolean visible) { 5555 if (!mResumed) { 5556 // Do not permit paused or stopped activities to do this. 5557 visible = false; 5558 } 5559 try { 5560 mVisibleBehind = ActivityManagerNative.getDefault() 5561 .requestVisibleBehind(mToken, visible) && visible; 5562 } catch (RemoteException e) { 5563 mVisibleBehind = false; 5564 } 5565 return mVisibleBehind; 5566 } 5567 5568 /** 5569 * Called when a translucent activity over this activity is becoming opaque or another 5570 * activity is being launched. Activities that override this method must call 5571 * <code>super.onVisibleBehindCanceled()</code> or a SuperNotCalledException will be thrown. 5572 * 5573 * <p>When this method is called the activity has 500 msec to release any resources it may be 5574 * using while visible in the background. 5575 * If the activity has not returned from this method in 500 msec the system will destroy 5576 * the activity and kill the process in order to recover the resources for another 5577 * process. Otherwise {@link #onStop()} will be called following return. 5578 * 5579 * @see #requestVisibleBehind(boolean) 5580 * @see #onBackgroundVisibleBehindChanged(boolean) 5581 */ 5582 public void onVisibleBehindCanceled() { 5583 mCalled = true; 5584 } 5585 5586 /** 5587 * Translucent activities may call this to determine if there is an activity below them that 5588 * is currently set to be visible in the background. 5589 * 5590 * @return true if an activity below is set to visible according to the most recent call to 5591 * {@link #requestVisibleBehind(boolean)}, false otherwise. 5592 * 5593 * @see #requestVisibleBehind(boolean) 5594 * @see #onVisibleBehindCanceled() 5595 * @see #onBackgroundVisibleBehindChanged(boolean) 5596 * @hide 5597 */ 5598 @SystemApi 5599 public boolean isBackgroundVisibleBehind() { 5600 try { 5601 return ActivityManagerNative.getDefault().isBackgroundVisibleBehind(mToken); 5602 } catch (RemoteException e) { 5603 } 5604 return false; 5605 } 5606 5607 /** 5608 * The topmost foreground activity will receive this call when the background visibility state 5609 * of the activity below it changes. 5610 * 5611 * This call may be a consequence of {@link #requestVisibleBehind(boolean)} or might be 5612 * due to a background activity finishing itself. 5613 * 5614 * @param visible true if a background activity is visible, false otherwise. 5615 * 5616 * @see #requestVisibleBehind(boolean) 5617 * @see #onVisibleBehindCanceled() 5618 * @hide 5619 */ 5620 @SystemApi 5621 public void onBackgroundVisibleBehindChanged(boolean visible) { 5622 } 5623 5624 /** 5625 * Activities cannot draw during the period that their windows are animating in. In order 5626 * to know when it is safe to begin drawing they can override this method which will be 5627 * called when the entering animation has completed. 5628 */ 5629 public void onEnterAnimationComplete() { 5630 } 5631 5632 /** 5633 * @hide 5634 */ 5635 public void dispatchEnterAnimationComplete() { 5636 onEnterAnimationComplete(); 5637 if (getWindow() != null && getWindow().getDecorView() != null) { 5638 getWindow().getDecorView().getViewTreeObserver().dispatchOnEnterAnimationComplete(); 5639 } 5640 } 5641 5642 /** 5643 * Adjust the current immersive mode setting. 5644 * 5645 * Note that changing this value will have no effect on the activity's 5646 * {@link android.content.pm.ActivityInfo} structure; that is, if 5647 * <code>android:immersive</code> is set to <code>true</code> 5648 * in the application's manifest entry for this activity, the {@link 5649 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 5650 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 5651 * FLAG_IMMERSIVE} bit set. 5652 * 5653 * @see #isImmersive() 5654 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 5655 */ 5656 public void setImmersive(boolean i) { 5657 try { 5658 ActivityManagerNative.getDefault().setImmersive(mToken, i); 5659 } catch (RemoteException e) { 5660 // pass 5661 } 5662 } 5663 5664 /** 5665 * Start an action mode. 5666 * 5667 * @param callback Callback that will manage lifecycle events for this context mode 5668 * @return The ContextMode that was started, or null if it was canceled 5669 * 5670 * @see ActionMode 5671 */ 5672 @Nullable 5673 public ActionMode startActionMode(ActionMode.Callback callback) { 5674 return mWindow.getDecorView().startActionMode(callback); 5675 } 5676 5677 /** 5678 * Give the Activity a chance to control the UI for an action mode requested 5679 * by the system. 5680 * 5681 * <p>Note: If you are looking for a notification callback that an action mode 5682 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 5683 * 5684 * @param callback The callback that should control the new action mode 5685 * @return The new action mode, or <code>null</code> if the activity does not want to 5686 * provide special handling for this action mode. (It will be handled by the system.) 5687 */ 5688 @Nullable 5689 @Override 5690 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 5691 initWindowDecorActionBar(); 5692 if (mActionBar != null) { 5693 return mActionBar.startActionMode(callback); 5694 } 5695 return null; 5696 } 5697 5698 /** 5699 * Notifies the Activity that an action mode has been started. 5700 * Activity subclasses overriding this method should call the superclass implementation. 5701 * 5702 * @param mode The new action mode. 5703 */ 5704 @Override 5705 public void onActionModeStarted(ActionMode mode) { 5706 } 5707 5708 /** 5709 * Notifies the activity that an action mode has finished. 5710 * Activity subclasses overriding this method should call the superclass implementation. 5711 * 5712 * @param mode The action mode that just finished. 5713 */ 5714 @Override 5715 public void onActionModeFinished(ActionMode mode) { 5716 } 5717 5718 /** 5719 * Returns true if the app should recreate the task when navigating 'up' from this activity 5720 * by using targetIntent. 5721 * 5722 * <p>If this method returns false the app can trivially call 5723 * {@link #navigateUpTo(Intent)} using the same parameters to correctly perform 5724 * up navigation. If this method returns false, the app should synthesize a new task stack 5725 * by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation.</p> 5726 * 5727 * @param targetIntent An intent representing the target destination for up navigation 5728 * @return true if navigating up should recreate a new task stack, false if the same task 5729 * should be used for the destination 5730 */ 5731 public boolean shouldUpRecreateTask(Intent targetIntent) { 5732 try { 5733 PackageManager pm = getPackageManager(); 5734 ComponentName cn = targetIntent.getComponent(); 5735 if (cn == null) { 5736 cn = targetIntent.resolveActivity(pm); 5737 } 5738 ActivityInfo info = pm.getActivityInfo(cn, 0); 5739 if (info.taskAffinity == null) { 5740 return false; 5741 } 5742 return ActivityManagerNative.getDefault() 5743 .shouldUpRecreateTask(mToken, info.taskAffinity); 5744 } catch (RemoteException e) { 5745 return false; 5746 } catch (NameNotFoundException e) { 5747 return false; 5748 } 5749 } 5750 5751 /** 5752 * Navigate from this activity to the activity specified by upIntent, finishing this activity 5753 * in the process. If the activity indicated by upIntent already exists in the task's history, 5754 * this activity and all others before the indicated activity in the history stack will be 5755 * finished. 5756 * 5757 * <p>If the indicated activity does not appear in the history stack, this will finish 5758 * each activity in this task until the root activity of the task is reached, resulting in 5759 * an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy 5760 * when an activity may be reached by a path not passing through a canonical parent 5761 * activity.</p> 5762 * 5763 * <p>This method should be used when performing up navigation from within the same task 5764 * as the destination. If up navigation should cross tasks in some cases, see 5765 * {@link #shouldUpRecreateTask(Intent)}.</p> 5766 * 5767 * @param upIntent An intent representing the target destination for up navigation 5768 * 5769 * @return true if up navigation successfully reached the activity indicated by upIntent and 5770 * upIntent was delivered to it. false if an instance of the indicated activity could 5771 * not be found and this activity was simply finished normally. 5772 */ 5773 public boolean navigateUpTo(Intent upIntent) { 5774 if (mParent == null) { 5775 ComponentName destInfo = upIntent.getComponent(); 5776 if (destInfo == null) { 5777 destInfo = upIntent.resolveActivity(getPackageManager()); 5778 if (destInfo == null) { 5779 return false; 5780 } 5781 upIntent = new Intent(upIntent); 5782 upIntent.setComponent(destInfo); 5783 } 5784 int resultCode; 5785 Intent resultData; 5786 synchronized (this) { 5787 resultCode = mResultCode; 5788 resultData = mResultData; 5789 } 5790 if (resultData != null) { 5791 resultData.prepareToLeaveProcess(); 5792 } 5793 try { 5794 upIntent.prepareToLeaveProcess(); 5795 return ActivityManagerNative.getDefault().navigateUpTo(mToken, upIntent, 5796 resultCode, resultData); 5797 } catch (RemoteException e) { 5798 return false; 5799 } 5800 } else { 5801 return mParent.navigateUpToFromChild(this, upIntent); 5802 } 5803 } 5804 5805 /** 5806 * This is called when a child activity of this one calls its 5807 * {@link #navigateUpTo} method. The default implementation simply calls 5808 * navigateUpTo(upIntent) on this activity (the parent). 5809 * 5810 * @param child The activity making the call. 5811 * @param upIntent An intent representing the target destination for up navigation 5812 * 5813 * @return true if up navigation successfully reached the activity indicated by upIntent and 5814 * upIntent was delivered to it. false if an instance of the indicated activity could 5815 * not be found and this activity was simply finished normally. 5816 */ 5817 public boolean navigateUpToFromChild(Activity child, Intent upIntent) { 5818 return navigateUpTo(upIntent); 5819 } 5820 5821 /** 5822 * Obtain an {@link Intent} that will launch an explicit target activity specified by 5823 * this activity's logical parent. The logical parent is named in the application's manifest 5824 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute. 5825 * Activity subclasses may override this method to modify the Intent returned by 5826 * super.getParentActivityIntent() or to implement a different mechanism of retrieving 5827 * the parent intent entirely. 5828 * 5829 * @return a new Intent targeting the defined parent of this activity or null if 5830 * there is no valid parent. 5831 */ 5832 @Nullable 5833 public Intent getParentActivityIntent() { 5834 final String parentName = mActivityInfo.parentActivityName; 5835 if (TextUtils.isEmpty(parentName)) { 5836 return null; 5837 } 5838 5839 // If the parent itself has no parent, generate a main activity intent. 5840 final ComponentName target = new ComponentName(this, parentName); 5841 try { 5842 final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0); 5843 final String parentActivity = parentInfo.parentActivityName; 5844 final Intent parentIntent = parentActivity == null 5845 ? Intent.makeMainActivity(target) 5846 : new Intent().setComponent(target); 5847 return parentIntent; 5848 } catch (NameNotFoundException e) { 5849 Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName + 5850 "' in manifest"); 5851 return null; 5852 } 5853 } 5854 5855 /** 5856 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 5857 * android.view.View, String)} was used to start an Activity, <var>callback</var> 5858 * will be called to handle shared elements on the <i>launched</i> Activity. This requires 5859 * {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 5860 * 5861 * @param callback Used to manipulate shared element transitions on the launched Activity. 5862 */ 5863 public void setEnterSharedElementCallback(SharedElementCallback callback) { 5864 if (callback == null) { 5865 callback = SharedElementCallback.NULL_CALLBACK; 5866 } 5867 mEnterTransitionListener = callback; 5868 } 5869 5870 /** 5871 * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 5872 * android.view.View, String)} was used to start an Activity, <var>callback</var> 5873 * will be called to handle shared elements on the <i>launching</i> Activity. Most 5874 * calls will only come when returning from the started Activity. 5875 * This requires {@link Window#FEATURE_ACTIVITY_TRANSITIONS}. 5876 * 5877 * @param callback Used to manipulate shared element transitions on the launching Activity. 5878 */ 5879 public void setExitSharedElementCallback(SharedElementCallback callback) { 5880 if (callback == null) { 5881 callback = SharedElementCallback.NULL_CALLBACK; 5882 } 5883 mExitTransitionListener = callback; 5884 } 5885 5886 /** 5887 * Postpone the entering activity transition when Activity was started with 5888 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 5889 * android.util.Pair[])}. 5890 * <p>This method gives the Activity the ability to delay starting the entering and 5891 * shared element transitions until all data is loaded. Until then, the Activity won't 5892 * draw into its window, leaving the window transparent. This may also cause the 5893 * returning animation to be delayed until data is ready. This method should be 5894 * called in {@link #onCreate(android.os.Bundle)} or in 5895 * {@link #onActivityReenter(int, android.content.Intent)}. 5896 * {@link #startPostponedEnterTransition()} must be called to allow the Activity to 5897 * start the transitions. If the Activity did not use 5898 * {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, 5899 * android.util.Pair[])}, then this method does nothing.</p> 5900 */ 5901 public void postponeEnterTransition() { 5902 mActivityTransitionState.postponeEnterTransition(); 5903 } 5904 5905 /** 5906 * Begin postponed transitions after {@link #postponeEnterTransition()} was called. 5907 * If postponeEnterTransition() was called, you must call startPostponedEnterTransition() 5908 * to have your Activity start drawing. 5909 */ 5910 public void startPostponedEnterTransition() { 5911 mActivityTransitionState.startPostponedEnterTransition(); 5912 } 5913 5914 // ------------------ Internal API ------------------ 5915 5916 final void setParent(Activity parent) { 5917 mParent = parent; 5918 } 5919 5920 final void attach(Context context, ActivityThread aThread, 5921 Instrumentation instr, IBinder token, int ident, 5922 Application application, Intent intent, ActivityInfo info, 5923 CharSequence title, Activity parent, String id, 5924 NonConfigurationInstances lastNonConfigurationInstances, 5925 Configuration config, String referrer, IVoiceInteractor voiceInteractor) { 5926 attachBaseContext(context); 5927 5928 mFragments.attachActivity(this, mContainer, null); 5929 5930 mWindow = PolicyManager.makeNewWindow(this); 5931 mWindow.setCallback(this); 5932 mWindow.setOnWindowDismissedCallback(this); 5933 mWindow.getLayoutInflater().setPrivateFactory(this); 5934 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 5935 mWindow.setSoftInputMode(info.softInputMode); 5936 } 5937 if (info.uiOptions != 0) { 5938 mWindow.setUiOptions(info.uiOptions); 5939 } 5940 mUiThread = Thread.currentThread(); 5941 5942 mMainThread = aThread; 5943 mInstrumentation = instr; 5944 mToken = token; 5945 mIdent = ident; 5946 mApplication = application; 5947 mIntent = intent; 5948 mReferrer = referrer; 5949 mComponent = intent.getComponent(); 5950 mActivityInfo = info; 5951 mTitle = title; 5952 mParent = parent; 5953 mEmbeddedID = id; 5954 mLastNonConfigurationInstances = lastNonConfigurationInstances; 5955 if (voiceInteractor != null) { 5956 if (lastNonConfigurationInstances != null) { 5957 mVoiceInteractor = lastNonConfigurationInstances.voiceInteractor; 5958 } else { 5959 mVoiceInteractor = new VoiceInteractor(voiceInteractor, this, this, 5960 Looper.myLooper()); 5961 } 5962 } 5963 5964 mWindow.setWindowManager( 5965 (WindowManager)context.getSystemService(Context.WINDOW_SERVICE), 5966 mToken, mComponent.flattenToString(), 5967 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 5968 if (mParent != null) { 5969 mWindow.setContainer(mParent.getWindow()); 5970 } 5971 mWindowManager = mWindow.getWindowManager(); 5972 mCurrentConfig = config; 5973 } 5974 5975 /** @hide */ 5976 public final IBinder getActivityToken() { 5977 return mParent != null ? mParent.getActivityToken() : mToken; 5978 } 5979 5980 final void performCreateCommon() { 5981 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 5982 com.android.internal.R.styleable.Window_windowNoDisplay, false); 5983 mFragments.dispatchActivityCreated(); 5984 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 5985 } 5986 5987 final void performCreate(Bundle icicle) { 5988 onCreate(icicle); 5989 mActivityTransitionState.readState(icicle); 5990 performCreateCommon(); 5991 } 5992 5993 final void performCreate(Bundle icicle, PersistableBundle persistentState) { 5994 onCreate(icicle, persistentState); 5995 mActivityTransitionState.readState(icicle); 5996 performCreateCommon(); 5997 } 5998 5999 final void performStart() { 6000 mActivityTransitionState.setEnterActivityOptions(this, getActivityOptions()); 6001 mFragments.noteStateNotSaved(); 6002 mCalled = false; 6003 mFragments.execPendingActions(); 6004 mInstrumentation.callActivityOnStart(this); 6005 if (!mCalled) { 6006 throw new SuperNotCalledException( 6007 "Activity " + mComponent.toShortString() + 6008 " did not call through to super.onStart()"); 6009 } 6010 mFragments.dispatchStart(); 6011 if (mAllLoaderManagers != null) { 6012 final int N = mAllLoaderManagers.size(); 6013 LoaderManagerImpl loaders[] = new LoaderManagerImpl[N]; 6014 for (int i=N-1; i>=0; i--) { 6015 loaders[i] = mAllLoaderManagers.valueAt(i); 6016 } 6017 for (int i=0; i<N; i++) { 6018 LoaderManagerImpl lm = loaders[i]; 6019 lm.finishRetain(); 6020 lm.doReportStart(); 6021 } 6022 } 6023 mActivityTransitionState.enterReady(this); 6024 } 6025 6026 final void performRestart() { 6027 mFragments.noteStateNotSaved(); 6028 6029 if (mStopped) { 6030 mStopped = false; 6031 if (mToken != null && mParent == null) { 6032 WindowManagerGlobal.getInstance().setStoppedState(mToken, false); 6033 } 6034 6035 synchronized (mManagedCursors) { 6036 final int N = mManagedCursors.size(); 6037 for (int i=0; i<N; i++) { 6038 ManagedCursor mc = mManagedCursors.get(i); 6039 if (mc.mReleased || mc.mUpdated) { 6040 if (!mc.mCursor.requery()) { 6041 if (getApplicationInfo().targetSdkVersion 6042 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 6043 throw new IllegalStateException( 6044 "trying to requery an already closed cursor " 6045 + mc.mCursor); 6046 } 6047 } 6048 mc.mReleased = false; 6049 mc.mUpdated = false; 6050 } 6051 } 6052 } 6053 6054 mCalled = false; 6055 mInstrumentation.callActivityOnRestart(this); 6056 if (!mCalled) { 6057 throw new SuperNotCalledException( 6058 "Activity " + mComponent.toShortString() + 6059 " did not call through to super.onRestart()"); 6060 } 6061 performStart(); 6062 } 6063 } 6064 6065 final void performResume() { 6066 performRestart(); 6067 6068 mFragments.execPendingActions(); 6069 6070 mLastNonConfigurationInstances = null; 6071 6072 mCalled = false; 6073 // mResumed is set by the instrumentation 6074 mInstrumentation.callActivityOnResume(this); 6075 if (!mCalled) { 6076 throw new SuperNotCalledException( 6077 "Activity " + mComponent.toShortString() + 6078 " did not call through to super.onResume()"); 6079 } 6080 6081 // Now really resume, and install the current status bar and menu. 6082 mCalled = false; 6083 6084 mFragments.dispatchResume(); 6085 mFragments.execPendingActions(); 6086 6087 onPostResume(); 6088 if (!mCalled) { 6089 throw new SuperNotCalledException( 6090 "Activity " + mComponent.toShortString() + 6091 " did not call through to super.onPostResume()"); 6092 } 6093 } 6094 6095 final void performPause() { 6096 mDoReportFullyDrawn = false; 6097 mFragments.dispatchPause(); 6098 mCalled = false; 6099 onPause(); 6100 mResumed = false; 6101 if (!mCalled && getApplicationInfo().targetSdkVersion 6102 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 6103 throw new SuperNotCalledException( 6104 "Activity " + mComponent.toShortString() + 6105 " did not call through to super.onPause()"); 6106 } 6107 mResumed = false; 6108 } 6109 6110 final void performUserLeaving() { 6111 onUserInteraction(); 6112 onUserLeaveHint(); 6113 } 6114 6115 final void performStop() { 6116 mDoReportFullyDrawn = false; 6117 if (mLoadersStarted) { 6118 mLoadersStarted = false; 6119 if (mLoaderManager != null) { 6120 if (!mChangingConfigurations) { 6121 mLoaderManager.doStop(); 6122 } else { 6123 mLoaderManager.doRetain(); 6124 } 6125 } 6126 } 6127 6128 if (!mStopped) { 6129 if (mWindow != null) { 6130 mWindow.closeAllPanels(); 6131 } 6132 6133 if (mToken != null && mParent == null) { 6134 WindowManagerGlobal.getInstance().setStoppedState(mToken, true); 6135 } 6136 6137 mFragments.dispatchStop(); 6138 6139 mCalled = false; 6140 mInstrumentation.callActivityOnStop(this); 6141 if (!mCalled) { 6142 throw new SuperNotCalledException( 6143 "Activity " + mComponent.toShortString() + 6144 " did not call through to super.onStop()"); 6145 } 6146 6147 synchronized (mManagedCursors) { 6148 final int N = mManagedCursors.size(); 6149 for (int i=0; i<N; i++) { 6150 ManagedCursor mc = mManagedCursors.get(i); 6151 if (!mc.mReleased) { 6152 mc.mCursor.deactivate(); 6153 mc.mReleased = true; 6154 } 6155 } 6156 } 6157 6158 mStopped = true; 6159 } 6160 mResumed = false; 6161 } 6162 6163 final void performDestroy() { 6164 mDestroyed = true; 6165 mWindow.destroy(); 6166 mFragments.dispatchDestroy(); 6167 onDestroy(); 6168 if (mLoaderManager != null) { 6169 mLoaderManager.doDestroy(); 6170 } 6171 if (mVoiceInteractor != null) { 6172 mVoiceInteractor.detachActivity(); 6173 } 6174 } 6175 6176 /** 6177 * @hide 6178 */ 6179 public final boolean isResumed() { 6180 return mResumed; 6181 } 6182 6183 void dispatchActivityResult(String who, int requestCode, 6184 int resultCode, Intent data) { 6185 if (false) Log.v( 6186 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 6187 + ", resCode=" + resultCode + ", data=" + data); 6188 mFragments.noteStateNotSaved(); 6189 if (who == null) { 6190 onActivityResult(requestCode, resultCode, data); 6191 } else { 6192 Fragment frag = mFragments.findFragmentByWho(who); 6193 if (frag != null) { 6194 frag.onActivityResult(requestCode, resultCode, data); 6195 } 6196 } 6197 } 6198 6199 /** 6200 * Request to put this Activity in a mode where the user is locked to the 6201 * current task. 6202 * 6203 * This will prevent the user from launching other apps, going to settings, 6204 * or reaching the home screen. 6205 * 6206 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns true 6207 * for this component then the app will go directly into Lock Task mode. The user 6208 * will not be able to exit this mode until {@link Activity#stopLockTask()} is called. 6209 * 6210 * If {@link DevicePolicyManager#isLockTaskPermitted(String)} returns false 6211 * then the system will prompt the user with a dialog requesting permission to enter 6212 * this mode. When entered through this method the user can exit at any time through 6213 * an action described by the request dialog. Calling stopLockTask will also exit the 6214 * mode. 6215 */ 6216 public void startLockTask() { 6217 try { 6218 ActivityManagerNative.getDefault().startLockTaskMode(mToken); 6219 } catch (RemoteException e) { 6220 } 6221 } 6222 6223 /** 6224 * Allow the user to switch away from the current task. 6225 * 6226 * Called to end the mode started by {@link Activity#startLockTask}. This 6227 * can only be called by activities that have successfully called 6228 * startLockTask previously. 6229 * 6230 * This will allow the user to exit this app and move onto other activities. 6231 */ 6232 public void stopLockTask() { 6233 try { 6234 ActivityManagerNative.getDefault().stopLockTaskMode(); 6235 } catch (RemoteException e) { 6236 } 6237 } 6238 6239 /** 6240 * Interface for informing a translucent {@link Activity} once all visible activities below it 6241 * have completed drawing. This is necessary only after an {@link Activity} has been made 6242 * opaque using {@link Activity#convertFromTranslucent()} and before it has been drawn 6243 * translucent again following a call to {@link 6244 * Activity#convertToTranslucent(android.app.Activity.TranslucentConversionListener, 6245 * ActivityOptions)} 6246 * 6247 * @hide 6248 */ 6249 @SystemApi 6250 public interface TranslucentConversionListener { 6251 /** 6252 * Callback made following {@link Activity#convertToTranslucent} once all visible Activities 6253 * below the top one have been redrawn. Following this callback it is safe to make the top 6254 * Activity translucent because the underlying Activity has been drawn. 6255 * 6256 * @param drawComplete True if the background Activity has drawn itself. False if a timeout 6257 * occurred waiting for the Activity to complete drawing. 6258 * 6259 * @see Activity#convertFromTranslucent() 6260 * @see Activity#convertToTranslucent(TranslucentConversionListener, ActivityOptions) 6261 */ 6262 public void onTranslucentConversionComplete(boolean drawComplete); 6263 } 6264} 6265