Activity.java revision cb1404e45639d20439d7700b06d57ca1a1aad1fa
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.app; 18 19import com.android.internal.app.ActionBarImpl; 20import com.android.internal.policy.PolicyManager; 21 22import android.content.ComponentCallbacks; 23import android.content.ComponentName; 24import android.content.ContentResolver; 25import android.content.Context; 26import android.content.CursorLoader; 27import android.content.IIntentSender; 28import android.content.Intent; 29import android.content.IntentSender; 30import android.content.SharedPreferences; 31import android.content.pm.ActivityInfo; 32import android.content.res.Configuration; 33import android.content.res.Resources; 34import android.content.res.TypedArray; 35import android.database.Cursor; 36import android.graphics.Bitmap; 37import android.graphics.Canvas; 38import android.graphics.drawable.Drawable; 39import android.media.AudioManager; 40import android.net.Uri; 41import android.os.Build; 42import android.os.Bundle; 43import android.os.Handler; 44import android.os.IBinder; 45import android.os.Looper; 46import android.os.Parcelable; 47import android.os.RemoteException; 48import android.text.Selection; 49import android.text.SpannableStringBuilder; 50import android.text.TextUtils; 51import android.text.method.TextKeyListener; 52import android.util.AttributeSet; 53import android.util.Config; 54import android.util.EventLog; 55import android.util.Log; 56import android.util.SparseArray; 57import android.view.ActionMode; 58import android.view.ContextMenu; 59import android.view.ContextMenu.ContextMenuInfo; 60import android.view.ContextThemeWrapper; 61import android.view.KeyEvent; 62import android.view.LayoutInflater; 63import android.view.Menu; 64import android.view.MenuInflater; 65import android.view.MenuItem; 66import android.view.MotionEvent; 67import android.view.View; 68import android.view.View.OnCreateContextMenuListener; 69import android.view.ViewGroup; 70import android.view.ViewGroup.LayoutParams; 71import android.view.ViewManager; 72import android.view.Window; 73import android.view.WindowManager; 74import android.view.accessibility.AccessibilityEvent; 75import android.widget.AdapterView; 76 77import java.io.FileDescriptor; 78import java.io.PrintWriter; 79import java.util.ArrayList; 80import java.util.HashMap; 81 82/** 83 * An activity is a single, focused thing that the user can do. Almost all 84 * activities interact with the user, so the Activity class takes care of 85 * creating a window for you in which you can place your UI with 86 * {@link #setContentView}. While activities are often presented to the user 87 * as full-screen windows, they can also be used in other ways: as floating 88 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 89 * or embedded inside of another activity (using {@link ActivityGroup}). 90 * 91 * There are two methods almost all subclasses of Activity will implement: 92 * 93 * <ul> 94 * <li> {@link #onCreate} is where you initialize your activity. Most 95 * importantly, here you will usually call {@link #setContentView(int)} 96 * with a layout resource defining your UI, and using {@link #findViewById} 97 * to retrieve the widgets in that UI that you need to interact with 98 * programmatically. 99 * 100 * <li> {@link #onPause} is where you deal with the user leaving your 101 * activity. Most importantly, any changes made by the user should at this 102 * point be committed (usually to the 103 * {@link android.content.ContentProvider} holding the data). 104 * </ul> 105 * 106 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 107 * activity classes must have a corresponding 108 * {@link android.R.styleable#AndroidManifestActivity <activity>} 109 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 110 * 111 * <p>The Activity class is an important part of an application's overall lifecycle, 112 * and the way activities are launched and put together is a fundamental 113 * part of the platform's application model. For a detailed perspective on the structure of 114 * Android applications and lifecycles, please read the <em>Dev Guide</em> document on 115 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a>.</p> 116 * 117 * <p>Topics covered here: 118 * <ol> 119 * <li><a href="#Fragments">Fragments</a> 120 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 121 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 122 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 123 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 124 * <li><a href="#Permissions">Permissions</a> 125 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 126 * </ol> 127 * 128 * <a name="Fragments"></a> 129 * <h3>Fragments</h3> 130 * 131 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 132 * implementations can make use of the {@link Fragment} class to better 133 * modularize their code, build more sophisticated user interfaces for larger 134 * screens, and help scale their application between small and large screens. 135 * 136 * <a name="ActivityLifecycle"></a> 137 * <h3>Activity Lifecycle</h3> 138 * 139 * <p>Activities in the system are managed as an <em>activity stack</em>. 140 * When a new activity is started, it is placed on the top of the stack 141 * and becomes the running activity -- the previous activity always remains 142 * below it in the stack, and will not come to the foreground again until 143 * the new activity exits.</p> 144 * 145 * <p>An activity has essentially four states:</p> 146 * <ul> 147 * <li> If an activity in the foreground of the screen (at the top of 148 * the stack), 149 * it is <em>active</em> or <em>running</em>. </li> 150 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 151 * or transparent activity has focus on top of your activity), it 152 * is <em>paused</em>. A paused activity is completely alive (it 153 * maintains all state and member information and remains attached to 154 * the window manager), but can be killed by the system in extreme 155 * low memory situations. 156 * <li>If an activity is completely obscured by another activity, 157 * it is <em>stopped</em>. It still retains all state and member information, 158 * however, it is no longer visible to the user so its window is hidden 159 * and it will often be killed by the system when memory is needed 160 * elsewhere.</li> 161 * <li>If an activity is paused or stopped, the system can drop the activity 162 * from memory by either asking it to finish, or simply killing its 163 * process. When it is displayed again to the user, it must be 164 * completely restarted and restored to its previous state.</li> 165 * </ul> 166 * 167 * <p>The following diagram shows the important state paths of an Activity. 168 * The square rectangles represent callback methods you can implement to 169 * perform operations when the Activity moves between states. The colored 170 * ovals are major states the Activity can be in.</p> 171 * 172 * <p><img src="../../../images/activity_lifecycle.png" 173 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 174 * 175 * <p>There are three key loops you may be interested in monitoring within your 176 * activity: 177 * 178 * <ul> 179 * <li>The <b>entire lifetime</b> of an activity happens between the first call 180 * to {@link android.app.Activity#onCreate} through to a single final call 181 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 182 * of "global" state in onCreate(), and release all remaining resources in 183 * onDestroy(). For example, if it has a thread running in the background 184 * to download data from the network, it may create that thread in onCreate() 185 * and then stop the thread in onDestroy(). 186 * 187 * <li>The <b>visible lifetime</b> of an activity happens between a call to 188 * {@link android.app.Activity#onStart} until a corresponding call to 189 * {@link android.app.Activity#onStop}. During this time the user can see the 190 * activity on-screen, though it may not be in the foreground and interacting 191 * with the user. Between these two methods you can maintain resources that 192 * are needed to show the activity to the user. For example, you can register 193 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 194 * that impact your UI, and unregister it in onStop() when the user an no 195 * longer see what you are displaying. The onStart() and onStop() methods 196 * can be called multiple times, as the activity becomes visible and hidden 197 * to the user. 198 * 199 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 200 * {@link android.app.Activity#onResume} until a corresponding call to 201 * {@link android.app.Activity#onPause}. During this time the activity is 202 * in front of all other activities and interacting with the user. An activity 203 * can frequently go between the resumed and paused states -- for example when 204 * the device goes to sleep, when an activity result is delivered, when a new 205 * intent is delivered -- so the code in these methods should be fairly 206 * lightweight. 207 * </ul> 208 * 209 * <p>The entire lifecycle of an activity is defined by the following 210 * Activity methods. All of these are hooks that you can override 211 * to do appropriate work when the activity changes state. All 212 * activities will implement {@link android.app.Activity#onCreate} 213 * to do their initial setup; many will also implement 214 * {@link android.app.Activity#onPause} to commit changes to data and 215 * otherwise prepare to stop interacting with the user. You should always 216 * call up to your superclass when implementing these methods.</p> 217 * 218 * </p> 219 * <pre class="prettyprint"> 220 * public class Activity extends ApplicationContext { 221 * protected void onCreate(Bundle savedInstanceState); 222 * 223 * protected void onStart(); 224 * 225 * protected void onRestart(); 226 * 227 * protected void onResume(); 228 * 229 * protected void onPause(); 230 * 231 * protected void onStop(); 232 * 233 * protected void onDestroy(); 234 * } 235 * </pre> 236 * 237 * <p>In general the movement through an activity's lifecycle looks like 238 * this:</p> 239 * 240 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 241 * <colgroup align="left" span="3" /> 242 * <colgroup align="left" /> 243 * <colgroup align="center" /> 244 * <colgroup align="center" /> 245 * 246 * <thead> 247 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 248 * </thead> 249 * 250 * <tbody> 251 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 252 * <td>Called when the activity is first created. 253 * This is where you should do all of your normal static set up: 254 * create views, bind data to lists, etc. This method also 255 * provides you with a Bundle containing the activity's previously 256 * frozen state, if there was one. 257 * <p>Always followed by <code>onStart()</code>.</td> 258 * <td align="center">No</td> 259 * <td align="center"><code>onStart()</code></td> 260 * </tr> 261 * 262 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 263 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 264 * <td>Called after your activity has been stopped, prior to it being 265 * started again. 266 * <p>Always followed by <code>onStart()</code></td> 267 * <td align="center">No</td> 268 * <td align="center"><code>onStart()</code></td> 269 * </tr> 270 * 271 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 272 * <td>Called when the activity is becoming visible to the user. 273 * <p>Followed by <code>onResume()</code> if the activity comes 274 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 275 * <td align="center">No</td> 276 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 277 * </tr> 278 * 279 * <tr><td rowspan="2" style="border-left: none;"> </td> 280 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 281 * <td>Called when the activity will start 282 * interacting with the user. At this point your activity is at 283 * the top of the activity stack, with user input going to it. 284 * <p>Always followed by <code>onPause()</code>.</td> 285 * <td align="center">No</td> 286 * <td align="center"><code>onPause()</code></td> 287 * </tr> 288 * 289 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 290 * <td>Called when the system is about to start resuming a previous 291 * activity. This is typically used to commit unsaved changes to 292 * persistent data, stop animations and other things that may be consuming 293 * CPU, etc. Implementations of this method must be very quick because 294 * the next activity will not be resumed until this method returns. 295 * <p>Followed by either <code>onResume()</code> if the activity 296 * returns back to the front, or <code>onStop()</code> if it becomes 297 * invisible to the user.</td> 298 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 299 * <td align="center"><code>onResume()</code> or<br> 300 * <code>onStop()</code></td> 301 * </tr> 302 * 303 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 304 * <td>Called when the activity is no longer visible to the user, because 305 * another activity has been resumed and is covering this one. This 306 * may happen either because a new activity is being started, an existing 307 * one is being brought in front of this one, or this one is being 308 * destroyed. 309 * <p>Followed by either <code>onRestart()</code> if 310 * this activity is coming back to interact with the user, or 311 * <code>onDestroy()</code> if this activity is going away.</td> 312 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 313 * <td align="center"><code>onRestart()</code> or<br> 314 * <code>onDestroy()</code></td> 315 * </tr> 316 * 317 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 318 * <td>The final call you receive before your 319 * activity is destroyed. This can happen either because the 320 * activity is finishing (someone called {@link Activity#finish} on 321 * it, or because the system is temporarily destroying this 322 * instance of the activity to save space. You can distinguish 323 * between these two scenarios with the {@link 324 * Activity#isFinishing} method.</td> 325 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 326 * <td align="center"><em>nothing</em></td> 327 * </tr> 328 * </tbody> 329 * </table> 330 * 331 * <p>Note the "Killable" column in the above table -- for those methods that 332 * are marked as being killable, after that method returns the process hosting the 333 * activity may killed by the system <em>at any time</em> without another line 334 * of its code being executed. Because of this, you should use the 335 * {@link #onPause} method to write any persistent data (such as user edits) 336 * to storage. In addition, the method 337 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 338 * in such a background state, allowing you to save away any dynamic instance 339 * state in your activity into the given Bundle, to be later received in 340 * {@link #onCreate} if the activity needs to be re-created. 341 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 342 * section for more information on how the lifecycle of a process is tied 343 * to the activities it is hosting. Note that it is important to save 344 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 345 * because the later is not part of the lifecycle callbacks, so will not 346 * be called in every situation as described in its documentation.</p> 347 * 348 * <p class="note">Be aware that these semantics will change slightly between 349 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 350 * vs. those targeting prior platforms. Starting with Honeycomb, an application 351 * is not in the killable state until its {@link #onStop} has returned. This 352 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 353 * safely called after {@link #onPause()} and allows and application to safely 354 * wait until {@link #onStop()} to save persistent state.</p> 355 * 356 * <p>For those methods that are not marked as being killable, the activity's 357 * process will not be killed by the system starting from the time the method 358 * is called and continuing after it returns. Thus an activity is in the killable 359 * state, for example, between after <code>onPause()</code> to the start of 360 * <code>onResume()</code>.</p> 361 * 362 * <a name="ConfigurationChanges"></a> 363 * <h3>Configuration Changes</h3> 364 * 365 * <p>If the configuration of the device (as defined by the 366 * {@link Configuration Resources.Configuration} class) changes, 367 * then anything displaying a user interface will need to update to match that 368 * configuration. Because Activity is the primary mechanism for interacting 369 * with the user, it includes special support for handling configuration 370 * changes.</p> 371 * 372 * <p>Unless you specify otherwise, a configuration change (such as a change 373 * in screen orientation, language, input devices, etc) will cause your 374 * current activity to be <em>destroyed</em>, going through the normal activity 375 * lifecycle process of {@link #onPause}, 376 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 377 * had been in the foreground or visible to the user, once {@link #onDestroy} is 378 * called in that instance then a new instance of the activity will be 379 * created, with whatever savedInstanceState the previous instance had generated 380 * from {@link #onSaveInstanceState}.</p> 381 * 382 * <p>This is done because any application resource, 383 * including layout files, can change based on any configuration value. Thus 384 * the only safe way to handle a configuration change is to re-retrieve all 385 * resources, including layouts, drawables, and strings. Because activities 386 * must already know how to save their state and re-create themselves from 387 * that state, this is a convenient way to have an activity restart itself 388 * with a new configuration.</p> 389 * 390 * <p>In some special cases, you may want to bypass restarting of your 391 * activity based on one or more types of configuration changes. This is 392 * done with the {@link android.R.attr#configChanges android:configChanges} 393 * attribute in its manifest. For any types of configuration changes you say 394 * that you handle there, you will receive a call to your current activity's 395 * {@link #onConfigurationChanged} method instead of being restarted. If 396 * a configuration change involves any that you do not handle, however, the 397 * activity will still be restarted and {@link #onConfigurationChanged} 398 * will not be called.</p> 399 * 400 * <a name="StartingActivities"></a> 401 * <h3>Starting Activities and Getting Results</h3> 402 * 403 * <p>The {@link android.app.Activity#startActivity} 404 * method is used to start a 405 * new activity, which will be placed at the top of the activity stack. It 406 * takes a single argument, an {@link android.content.Intent Intent}, 407 * which describes the activity 408 * to be executed.</p> 409 * 410 * <p>Sometimes you want to get a result back from an activity when it 411 * ends. For example, you may start an activity that lets the user pick 412 * a person in a list of contacts; when it ends, it returns the person 413 * that was selected. To do this, you call the 414 * {@link android.app.Activity#startActivityForResult(Intent, int)} 415 * version with a second integer parameter identifying the call. The result 416 * will come back through your {@link android.app.Activity#onActivityResult} 417 * method.</p> 418 * 419 * <p>When an activity exits, it can call 420 * {@link android.app.Activity#setResult(int)} 421 * to return data back to its parent. It must always supply a result code, 422 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 423 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 424 * return back an Intent containing any additional data it wants. All of this 425 * information appears back on the 426 * parent's <code>Activity.onActivityResult()</code>, along with the integer 427 * identifier it originally supplied.</p> 428 * 429 * <p>If a child activity fails for any reason (such as crashing), the parent 430 * activity will receive a result with the code RESULT_CANCELED.</p> 431 * 432 * <pre class="prettyprint"> 433 * public class MyActivity extends Activity { 434 * ... 435 * 436 * static final int PICK_CONTACT_REQUEST = 0; 437 * 438 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 439 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 440 * // When the user center presses, let them pick a contact. 441 * startActivityForResult( 442 * new Intent(Intent.ACTION_PICK, 443 * new Uri("content://contacts")), 444 * PICK_CONTACT_REQUEST); 445 * return true; 446 * } 447 * return false; 448 * } 449 * 450 * protected void onActivityResult(int requestCode, int resultCode, 451 * Intent data) { 452 * if (requestCode == PICK_CONTACT_REQUEST) { 453 * if (resultCode == RESULT_OK) { 454 * // A contact was picked. Here we will just display it 455 * // to the user. 456 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 457 * } 458 * } 459 * } 460 * } 461 * </pre> 462 * 463 * <a name="SavingPersistentState"></a> 464 * <h3>Saving Persistent State</h3> 465 * 466 * <p>There are generally two kinds of persistent state than an activity 467 * will deal with: shared document-like data (typically stored in a SQLite 468 * database using a {@linkplain android.content.ContentProvider content provider}) 469 * and internal state such as user preferences.</p> 470 * 471 * <p>For content provider data, we suggest that activities use a 472 * "edit in place" user model. That is, any edits a user makes are effectively 473 * made immediately without requiring an additional confirmation step. 474 * Supporting this model is generally a simple matter of following two rules:</p> 475 * 476 * <ul> 477 * <li> <p>When creating a new document, the backing database entry or file for 478 * it is created immediately. For example, if the user chooses to write 479 * a new e-mail, a new entry for that e-mail is created as soon as they 480 * start entering data, so that if they go to any other activity after 481 * that point this e-mail will now appear in the list of drafts.</p> 482 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 483 * commit to the backing content provider or file any changes the user 484 * has made. This ensures that those changes will be seen by any other 485 * activity that is about to run. You will probably want to commit 486 * your data even more aggressively at key times during your 487 * activity's lifecycle: for example before starting a new 488 * activity, before finishing your own activity, when the user 489 * switches between input fields, etc.</p> 490 * </ul> 491 * 492 * <p>This model is designed to prevent data loss when a user is navigating 493 * between activities, and allows the system to safely kill an activity (because 494 * system resources are needed somewhere else) at any time after it has been 495 * paused. Note this implies 496 * that the user pressing BACK from your activity does <em>not</em> 497 * mean "cancel" -- it means to leave the activity with its current contents 498 * saved away. Canceling edits in an activity must be provided through 499 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 500 * 501 * <p>See the {@linkplain android.content.ContentProvider content package} for 502 * more information about content providers. These are a key aspect of how 503 * different activities invoke and propagate data between themselves.</p> 504 * 505 * <p>The Activity class also provides an API for managing internal persistent state 506 * associated with an activity. This can be used, for example, to remember 507 * the user's preferred initial display in a calendar (day view or week view) 508 * or the user's default home page in a web browser.</p> 509 * 510 * <p>Activity persistent state is managed 511 * with the method {@link #getPreferences}, 512 * allowing you to retrieve and 513 * modify a set of name/value pairs associated with the activity. To use 514 * preferences that are shared across multiple application components 515 * (activities, receivers, services, providers), you can use the underlying 516 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 517 * to retrieve a preferences 518 * object stored under a specific name. 519 * (Note that it is not possible to share settings data across application 520 * packages -- for that you will need a content provider.)</p> 521 * 522 * <p>Here is an excerpt from a calendar activity that stores the user's 523 * preferred view mode in its persistent settings:</p> 524 * 525 * <pre class="prettyprint"> 526 * public class CalendarActivity extends Activity { 527 * ... 528 * 529 * static final int DAY_VIEW_MODE = 0; 530 * static final int WEEK_VIEW_MODE = 1; 531 * 532 * private SharedPreferences mPrefs; 533 * private int mCurViewMode; 534 * 535 * protected void onCreate(Bundle savedInstanceState) { 536 * super.onCreate(savedInstanceState); 537 * 538 * SharedPreferences mPrefs = getSharedPreferences(); 539 * mCurViewMode = mPrefs.getInt("view_mode" DAY_VIEW_MODE); 540 * } 541 * 542 * protected void onPause() { 543 * super.onPause(); 544 * 545 * SharedPreferences.Editor ed = mPrefs.edit(); 546 * ed.putInt("view_mode", mCurViewMode); 547 * ed.commit(); 548 * } 549 * } 550 * </pre> 551 * 552 * <a name="Permissions"></a> 553 * <h3>Permissions</h3> 554 * 555 * <p>The ability to start a particular Activity can be enforced when it is 556 * declared in its 557 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 558 * tag. By doing so, other applications will need to declare a corresponding 559 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 560 * element in their own manifest to be able to start that activity. 561 * 562 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 563 * document for more information on permissions and security in general. 564 * 565 * <a name="ProcessLifecycle"></a> 566 * <h3>Process Lifecycle</h3> 567 * 568 * <p>The Android system attempts to keep application process around for as 569 * long as possible, but eventually will need to remove old processes when 570 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 571 * Lifecycle</a>, the decision about which process to remove is intimately 572 * tied to the state of the user's interaction with it. In general, there 573 * are four states a process can be in based on the activities running in it, 574 * listed here in order of importance. The system will kill less important 575 * processes (the last ones) before it resorts to killing more important 576 * processes (the first ones). 577 * 578 * <ol> 579 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 580 * that the user is currently interacting with) is considered the most important. 581 * Its process will only be killed as a last resort, if it uses more memory 582 * than is available on the device. Generally at this point the device has 583 * reached a memory paging state, so this is required in order to keep the user 584 * interface responsive. 585 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 586 * but not in the foreground, such as one sitting behind a foreground dialog) 587 * is considered extremely important and will not be killed unless that is 588 * required to keep the foreground activity running. 589 * <li> <p>A <b>background activity</b> (an activity that is not visible to 590 * the user and has been paused) is no longer critical, so the system may 591 * safely kill its process to reclaim memory for other foreground or 592 * visible processes. If its process needs to be killed, when the user navigates 593 * back to the activity (making it visible on the screen again), its 594 * {@link #onCreate} method will be called with the savedInstanceState it had previously 595 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 596 * state as the user last left it. 597 * <li> <p>An <b>empty process</b> is one hosting no activities or other 598 * application components (such as {@link Service} or 599 * {@link android.content.BroadcastReceiver} classes). These are killed very 600 * quickly by the system as memory becomes low. For this reason, any 601 * background operation you do outside of an activity must be executed in the 602 * context of an activity BroadcastReceiver or Service to ensure that the system 603 * knows it needs to keep your process around. 604 * </ol> 605 * 606 * <p>Sometimes an Activity may need to do a long-running operation that exists 607 * independently of the activity lifecycle itself. An example may be a camera 608 * application that allows you to upload a picture to a web site. The upload 609 * may take a long time, and the application should allow the user to leave 610 * the application will it is executing. To accomplish this, your Activity 611 * should start a {@link Service} in which the upload takes place. This allows 612 * the system to properly prioritize your process (considering it to be more 613 * important than other non-visible applications) for the duration of the 614 * upload, independent of whether the original activity is paused, stopped, 615 * or finished. 616 */ 617public class Activity extends ContextThemeWrapper 618 implements LayoutInflater.Factory2, 619 Window.Callback, KeyEvent.Callback, 620 OnCreateContextMenuListener, ComponentCallbacks { 621 private static final String TAG = "Activity"; 622 623 /** Standard activity result: operation canceled. */ 624 public static final int RESULT_CANCELED = 0; 625 /** Standard activity result: operation succeeded. */ 626 public static final int RESULT_OK = -1; 627 /** Start of user-defined activity results. */ 628 public static final int RESULT_FIRST_USER = 1; 629 630 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 631 private static final String FRAGMENTS_TAG = "android:fragments"; 632 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 633 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 634 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 635 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 636 637 private static class ManagedDialog { 638 Dialog mDialog; 639 Bundle mArgs; 640 } 641 private SparseArray<ManagedDialog> mManagedDialogs; 642 643 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 644 private Instrumentation mInstrumentation; 645 private IBinder mToken; 646 private int mIdent; 647 /*package*/ String mEmbeddedID; 648 private Application mApplication; 649 /*package*/ Intent mIntent; 650 private ComponentName mComponent; 651 /*package*/ ActivityInfo mActivityInfo; 652 /*package*/ ActivityThread mMainThread; 653 Activity mParent; 654 boolean mCalled; 655 boolean mCheckedForLoaderManager; 656 boolean mLoadersStarted; 657 /*package*/ boolean mResumed; 658 private boolean mStopped; 659 boolean mFinished; 660 boolean mStartedActivity; 661 /** true if the activity is going through a transient pause */ 662 /*package*/ boolean mTemporaryPause = false; 663 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 664 /*package*/ boolean mChangingConfigurations = false; 665 /*package*/ int mConfigChangeFlags; 666 /*package*/ Configuration mCurrentConfig; 667 private SearchManager mSearchManager; 668 669 static final class NonConfigurationInstances { 670 Object activity; 671 HashMap<String, Object> children; 672 ArrayList<Fragment> fragments; 673 SparseArray<LoaderManagerImpl> loaders; 674 } 675 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 676 677 private Window mWindow; 678 679 private WindowManager mWindowManager; 680 /*package*/ View mDecor = null; 681 /*package*/ boolean mWindowAdded = false; 682 /*package*/ boolean mVisibleFromServer = false; 683 /*package*/ boolean mVisibleFromClient = true; 684 /*package*/ ActionBarImpl mActionBar = null; 685 686 private CharSequence mTitle; 687 private int mTitleColor = 0; 688 689 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 690 691 SparseArray<LoaderManagerImpl> mAllLoaderManagers; 692 LoaderManagerImpl mLoaderManager; 693 694 private static final class ManagedCursor { 695 ManagedCursor(Cursor cursor) { 696 mCursor = cursor; 697 mReleased = false; 698 mUpdated = false; 699 } 700 701 private final Cursor mCursor; 702 private boolean mReleased; 703 private boolean mUpdated; 704 } 705 private final ArrayList<ManagedCursor> mManagedCursors = 706 new ArrayList<ManagedCursor>(); 707 708 // protected by synchronized (this) 709 int mResultCode = RESULT_CANCELED; 710 Intent mResultData = null; 711 712 private boolean mTitleReady = false; 713 714 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 715 private SpannableStringBuilder mDefaultKeySsb = null; 716 717 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 718 719 private Thread mUiThread; 720 final Handler mHandler = new Handler(); 721 722 /** Return the intent that started this activity. */ 723 public Intent getIntent() { 724 return mIntent; 725 } 726 727 /** 728 * Change the intent returned by {@link #getIntent}. This holds a 729 * reference to the given intent; it does not copy it. Often used in 730 * conjunction with {@link #onNewIntent}. 731 * 732 * @param newIntent The new Intent object to return from getIntent 733 * 734 * @see #getIntent 735 * @see #onNewIntent 736 */ 737 public void setIntent(Intent newIntent) { 738 mIntent = newIntent; 739 } 740 741 /** Return the application that owns this activity. */ 742 public final Application getApplication() { 743 return mApplication; 744 } 745 746 /** Is this activity embedded inside of another activity? */ 747 public final boolean isChild() { 748 return mParent != null; 749 } 750 751 /** Return the parent activity if this view is an embedded child. */ 752 public final Activity getParent() { 753 return mParent; 754 } 755 756 /** Retrieve the window manager for showing custom windows. */ 757 public WindowManager getWindowManager() { 758 return mWindowManager; 759 } 760 761 /** 762 * Retrieve the current {@link android.view.Window} for the activity. 763 * This can be used to directly access parts of the Window API that 764 * are not available through Activity/Screen. 765 * 766 * @return Window The current window, or null if the activity is not 767 * visual. 768 */ 769 public Window getWindow() { 770 return mWindow; 771 } 772 773 /** 774 * Return the LoaderManager for this fragment, creating it if needed. 775 */ 776 public LoaderManager getLoaderManager() { 777 if (mLoaderManager != null) { 778 return mLoaderManager; 779 } 780 mCheckedForLoaderManager = true; 781 mLoaderManager = getLoaderManager(-1, mLoadersStarted, true); 782 return mLoaderManager; 783 } 784 785 LoaderManagerImpl getLoaderManager(int index, boolean started, boolean create) { 786 if (mAllLoaderManagers == null) { 787 mAllLoaderManagers = new SparseArray<LoaderManagerImpl>(); 788 } 789 LoaderManagerImpl lm = mAllLoaderManagers.get(index); 790 if (lm == null) { 791 if (create) { 792 lm = new LoaderManagerImpl(this, started); 793 mAllLoaderManagers.put(index, lm); 794 } 795 } else { 796 lm.updateActivity(this); 797 } 798 return lm; 799 } 800 801 /** 802 * Calls {@link android.view.Window#getCurrentFocus} on the 803 * Window of this Activity to return the currently focused view. 804 * 805 * @return View The current View with focus or null. 806 * 807 * @see #getWindow 808 * @see android.view.Window#getCurrentFocus 809 */ 810 public View getCurrentFocus() { 811 return mWindow != null ? mWindow.getCurrentFocus() : null; 812 } 813 814 @Override 815 public int getWallpaperDesiredMinimumWidth() { 816 int width = super.getWallpaperDesiredMinimumWidth(); 817 return width <= 0 ? getWindowManager().getDefaultDisplay().getWidth() : width; 818 } 819 820 @Override 821 public int getWallpaperDesiredMinimumHeight() { 822 int height = super.getWallpaperDesiredMinimumHeight(); 823 return height <= 0 ? getWindowManager().getDefaultDisplay().getHeight() : height; 824 } 825 826 /** 827 * Called when the activity is starting. This is where most initialization 828 * should go: calling {@link #setContentView(int)} to inflate the 829 * activity's UI, using {@link #findViewById} to programmatically interact 830 * with widgets in the UI, calling 831 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 832 * cursors for data being displayed, etc. 833 * 834 * <p>You can call {@link #finish} from within this function, in 835 * which case onDestroy() will be immediately called without any of the rest 836 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 837 * {@link #onPause}, etc) executing. 838 * 839 * <p><em>Derived classes must call through to the super class's 840 * implementation of this method. If they do not, an exception will be 841 * thrown.</em></p> 842 * 843 * @param savedInstanceState If the activity is being re-initialized after 844 * previously being shut down then this Bundle contains the data it most 845 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 846 * 847 * @see #onStart 848 * @see #onSaveInstanceState 849 * @see #onRestoreInstanceState 850 * @see #onPostCreate 851 */ 852 protected void onCreate(Bundle savedInstanceState) { 853 if (mLastNonConfigurationInstances != null) { 854 mAllLoaderManagers = mLastNonConfigurationInstances.loaders; 855 } 856 if (savedInstanceState != null) { 857 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 858 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 859 ? mLastNonConfigurationInstances.fragments : null); 860 } 861 mFragments.dispatchCreate(); 862 mCalled = true; 863 } 864 865 /** 866 * The hook for {@link ActivityThread} to restore the state of this activity. 867 * 868 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 869 * {@link #restoreManagedDialogs(android.os.Bundle)}. 870 * 871 * @param savedInstanceState contains the saved state 872 */ 873 final void performRestoreInstanceState(Bundle savedInstanceState) { 874 onRestoreInstanceState(savedInstanceState); 875 restoreManagedDialogs(savedInstanceState); 876 } 877 878 /** 879 * This method is called after {@link #onStart} when the activity is 880 * being re-initialized from a previously saved state, given here in 881 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 882 * to restore their state, but it is sometimes convenient to do it here 883 * after all of the initialization has been done or to allow subclasses to 884 * decide whether to use your default implementation. The default 885 * implementation of this method performs a restore of any view state that 886 * had previously been frozen by {@link #onSaveInstanceState}. 887 * 888 * <p>This method is called between {@link #onStart} and 889 * {@link #onPostCreate}. 890 * 891 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 892 * 893 * @see #onCreate 894 * @see #onPostCreate 895 * @see #onResume 896 * @see #onSaveInstanceState 897 */ 898 protected void onRestoreInstanceState(Bundle savedInstanceState) { 899 if (mWindow != null) { 900 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 901 if (windowState != null) { 902 mWindow.restoreHierarchyState(windowState); 903 } 904 } 905 } 906 907 /** 908 * Restore the state of any saved managed dialogs. 909 * 910 * @param savedInstanceState The bundle to restore from. 911 */ 912 private void restoreManagedDialogs(Bundle savedInstanceState) { 913 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 914 if (b == null) { 915 return; 916 } 917 918 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 919 final int numDialogs = ids.length; 920 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 921 for (int i = 0; i < numDialogs; i++) { 922 final Integer dialogId = ids[i]; 923 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 924 if (dialogState != null) { 925 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 926 // so tell createDialog() not to do it, otherwise we get an exception 927 final ManagedDialog md = new ManagedDialog(); 928 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 929 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 930 if (md.mDialog != null) { 931 mManagedDialogs.put(dialogId, md); 932 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 933 md.mDialog.onRestoreInstanceState(dialogState); 934 } 935 } 936 } 937 } 938 939 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 940 final Dialog dialog = onCreateDialog(dialogId, args); 941 if (dialog == null) { 942 return null; 943 } 944 dialog.dispatchOnCreate(state); 945 return dialog; 946 } 947 948 private static String savedDialogKeyFor(int key) { 949 return SAVED_DIALOG_KEY_PREFIX + key; 950 } 951 952 private static String savedDialogArgsKeyFor(int key) { 953 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 954 } 955 956 /** 957 * Called when activity start-up is complete (after {@link #onStart} 958 * and {@link #onRestoreInstanceState} have been called). Applications will 959 * generally not implement this method; it is intended for system 960 * classes to do final initialization after application code has run. 961 * 962 * <p><em>Derived classes must call through to the super class's 963 * implementation of this method. If they do not, an exception will be 964 * thrown.</em></p> 965 * 966 * @param savedInstanceState If the activity is being re-initialized after 967 * previously being shut down then this Bundle contains the data it most 968 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 969 * @see #onCreate 970 */ 971 protected void onPostCreate(Bundle savedInstanceState) { 972 if (!isChild()) { 973 mTitleReady = true; 974 onTitleChanged(getTitle(), getTitleColor()); 975 } 976 mCalled = true; 977 } 978 979 /** 980 * Called after {@link #onCreate} — or after {@link #onRestart} when 981 * the activity had been stopped, but is now again being displayed to the 982 * user. It will be followed by {@link #onResume}. 983 * 984 * <p><em>Derived classes must call through to the super class's 985 * implementation of this method. If they do not, an exception will be 986 * thrown.</em></p> 987 * 988 * @see #onCreate 989 * @see #onStop 990 * @see #onResume 991 */ 992 protected void onStart() { 993 mCalled = true; 994 995 if (!mLoadersStarted) { 996 mLoadersStarted = true; 997 if (mLoaderManager != null) { 998 mLoaderManager.doStart(); 999 } else if (!mCheckedForLoaderManager) { 1000 mLoaderManager = getLoaderManager(-1, mLoadersStarted, false); 1001 } 1002 mCheckedForLoaderManager = true; 1003 } 1004 } 1005 1006 /** 1007 * Called after {@link #onStop} when the current activity is being 1008 * re-displayed to the user (the user has navigated back to it). It will 1009 * be followed by {@link #onStart} and then {@link #onResume}. 1010 * 1011 * <p>For activities that are using raw {@link Cursor} objects (instead of 1012 * creating them through 1013 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1014 * this is usually the place 1015 * where the cursor should be requeried (because you had deactivated it in 1016 * {@link #onStop}. 1017 * 1018 * <p><em>Derived classes must call through to the super class's 1019 * implementation of this method. If they do not, an exception will be 1020 * thrown.</em></p> 1021 * 1022 * @see #onStop 1023 * @see #onStart 1024 * @see #onResume 1025 */ 1026 protected void onRestart() { 1027 mCalled = true; 1028 } 1029 1030 /** 1031 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1032 * {@link #onPause}, for your activity to start interacting with the user. 1033 * This is a good place to begin animations, open exclusive-access devices 1034 * (such as the camera), etc. 1035 * 1036 * <p>Keep in mind that onResume is not the best indicator that your activity 1037 * is visible to the user; a system window such as the keyguard may be in 1038 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1039 * activity is visible to the user (for example, to resume a game). 1040 * 1041 * <p><em>Derived classes must call through to the super class's 1042 * implementation of this method. If they do not, an exception will be 1043 * thrown.</em></p> 1044 * 1045 * @see #onRestoreInstanceState 1046 * @see #onRestart 1047 * @see #onPostResume 1048 * @see #onPause 1049 */ 1050 protected void onResume() { 1051 mCalled = true; 1052 } 1053 1054 /** 1055 * Called when activity resume is complete (after {@link #onResume} has 1056 * been called). Applications will generally not implement this method; 1057 * it is intended for system classes to do final setup after application 1058 * resume code has run. 1059 * 1060 * <p><em>Derived classes must call through to the super class's 1061 * implementation of this method. If they do not, an exception will be 1062 * thrown.</em></p> 1063 * 1064 * @see #onResume 1065 */ 1066 protected void onPostResume() { 1067 final Window win = getWindow(); 1068 if (win != null) win.makeActive(); 1069 mCalled = true; 1070 } 1071 1072 /** 1073 * This is called for activities that set launchMode to "singleTop" in 1074 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1075 * flag when calling {@link #startActivity}. In either case, when the 1076 * activity is re-launched while at the top of the activity stack instead 1077 * of a new instance of the activity being started, onNewIntent() will be 1078 * called on the existing instance with the Intent that was used to 1079 * re-launch it. 1080 * 1081 * <p>An activity will always be paused before receiving a new intent, so 1082 * you can count on {@link #onResume} being called after this method. 1083 * 1084 * <p>Note that {@link #getIntent} still returns the original Intent. You 1085 * can use {@link #setIntent} to update it to this new Intent. 1086 * 1087 * @param intent The new intent that was started for the activity. 1088 * 1089 * @see #getIntent 1090 * @see #setIntent 1091 * @see #onResume 1092 */ 1093 protected void onNewIntent(Intent intent) { 1094 } 1095 1096 /** 1097 * The hook for {@link ActivityThread} to save the state of this activity. 1098 * 1099 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1100 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1101 * 1102 * @param outState The bundle to save the state to. 1103 */ 1104 final void performSaveInstanceState(Bundle outState) { 1105 onSaveInstanceState(outState); 1106 saveManagedDialogs(outState); 1107 } 1108 1109 /** 1110 * Called to retrieve per-instance state from an activity before being killed 1111 * so that the state can be restored in {@link #onCreate} or 1112 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1113 * will be passed to both). 1114 * 1115 * <p>This method is called before an activity may be killed so that when it 1116 * comes back some time in the future it can restore its state. For example, 1117 * if activity B is launched in front of activity A, and at some point activity 1118 * A is killed to reclaim resources, activity A will have a chance to save the 1119 * current state of its user interface via this method so that when the user 1120 * returns to activity A, the state of the user interface can be restored 1121 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1122 * 1123 * <p>Do not confuse this method with activity lifecycle callbacks such as 1124 * {@link #onPause}, which is always called when an activity is being placed 1125 * in the background or on its way to destruction, or {@link #onStop} which 1126 * is called before destruction. One example of when {@link #onPause} and 1127 * {@link #onStop} is called and not this method is when a user navigates back 1128 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1129 * on B because that particular instance will never be restored, so the 1130 * system avoids calling it. An example when {@link #onPause} is called and 1131 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1132 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1133 * killed during the lifetime of B since the state of the user interface of 1134 * A will stay intact. 1135 * 1136 * <p>The default implementation takes care of most of the UI per-instance 1137 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1138 * view in the hierarchy that has an id, and by saving the id of the currently 1139 * focused view (all of which is restored by the default implementation of 1140 * {@link #onRestoreInstanceState}). If you override this method to save additional 1141 * information not captured by each individual view, you will likely want to 1142 * call through to the default implementation, otherwise be prepared to save 1143 * all of the state of each view yourself. 1144 * 1145 * <p>If called, this method will occur before {@link #onStop}. There are 1146 * no guarantees about whether it will occur before or after {@link #onPause}. 1147 * 1148 * @param outState Bundle in which to place your saved state. 1149 * 1150 * @see #onCreate 1151 * @see #onRestoreInstanceState 1152 * @see #onPause 1153 */ 1154 protected void onSaveInstanceState(Bundle outState) { 1155 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1156 Parcelable p = mFragments.saveAllState(); 1157 if (p != null) { 1158 outState.putParcelable(FRAGMENTS_TAG, p); 1159 } 1160 } 1161 1162 /** 1163 * Save the state of any managed dialogs. 1164 * 1165 * @param outState place to store the saved state. 1166 */ 1167 private void saveManagedDialogs(Bundle outState) { 1168 if (mManagedDialogs == null) { 1169 return; 1170 } 1171 1172 final int numDialogs = mManagedDialogs.size(); 1173 if (numDialogs == 0) { 1174 return; 1175 } 1176 1177 Bundle dialogState = new Bundle(); 1178 1179 int[] ids = new int[mManagedDialogs.size()]; 1180 1181 // save each dialog's bundle, gather the ids 1182 for (int i = 0; i < numDialogs; i++) { 1183 final int key = mManagedDialogs.keyAt(i); 1184 ids[i] = key; 1185 final ManagedDialog md = mManagedDialogs.valueAt(i); 1186 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1187 if (md.mArgs != null) { 1188 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1189 } 1190 } 1191 1192 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1193 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1194 } 1195 1196 1197 /** 1198 * Called as part of the activity lifecycle when an activity is going into 1199 * the background, but has not (yet) been killed. The counterpart to 1200 * {@link #onResume}. 1201 * 1202 * <p>When activity B is launched in front of activity A, this callback will 1203 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1204 * so be sure to not do anything lengthy here. 1205 * 1206 * <p>This callback is mostly used for saving any persistent state the 1207 * activity is editing, to present a "edit in place" model to the user and 1208 * making sure nothing is lost if there are not enough resources to start 1209 * the new activity without first killing this one. This is also a good 1210 * place to do things like stop animations and other things that consume a 1211 * noticeable mount of CPU in order to make the switch to the next activity 1212 * as fast as possible, or to close resources that are exclusive access 1213 * such as the camera. 1214 * 1215 * <p>In situations where the system needs more memory it may kill paused 1216 * processes to reclaim resources. Because of this, you should be sure 1217 * that all of your state is saved by the time you return from 1218 * this function. In general {@link #onSaveInstanceState} is used to save 1219 * per-instance state in the activity and this method is used to store 1220 * global persistent data (in content providers, files, etc.) 1221 * 1222 * <p>After receiving this call you will usually receive a following call 1223 * to {@link #onStop} (after the next activity has been resumed and 1224 * displayed), however in some cases there will be a direct call back to 1225 * {@link #onResume} without going through the stopped state. 1226 * 1227 * <p><em>Derived classes must call through to the super class's 1228 * implementation of this method. If they do not, an exception will be 1229 * thrown.</em></p> 1230 * 1231 * @see #onResume 1232 * @see #onSaveInstanceState 1233 * @see #onStop 1234 */ 1235 protected void onPause() { 1236 mCalled = true; 1237 } 1238 1239 /** 1240 * Called as part of the activity lifecycle when an activity is about to go 1241 * into the background as the result of user choice. For example, when the 1242 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1243 * when an incoming phone call causes the in-call Activity to be automatically 1244 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1245 * the activity being interrupted. In cases when it is invoked, this method 1246 * is called right before the activity's {@link #onPause} callback. 1247 * 1248 * <p>This callback and {@link #onUserInteraction} are intended to help 1249 * activities manage status bar notifications intelligently; specifically, 1250 * for helping activities determine the proper time to cancel a notfication. 1251 * 1252 * @see #onUserInteraction() 1253 */ 1254 protected void onUserLeaveHint() { 1255 } 1256 1257 /** 1258 * Generate a new thumbnail for this activity. This method is called before 1259 * pausing the activity, and should draw into <var>outBitmap</var> the 1260 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1261 * can use the given <var>canvas</var>, which is configured to draw into the 1262 * bitmap, for rendering if desired. 1263 * 1264 * <p>The default implementation returns fails and does not draw a thumbnail; 1265 * this will result in the platform creating its own thumbnail if needed. 1266 * 1267 * @param outBitmap The bitmap to contain the thumbnail. 1268 * @param canvas Can be used to render into the bitmap. 1269 * 1270 * @return Return true if you have drawn into the bitmap; otherwise after 1271 * you return it will be filled with a default thumbnail. 1272 * 1273 * @see #onCreateDescription 1274 * @see #onSaveInstanceState 1275 * @see #onPause 1276 */ 1277 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1278 return false; 1279 } 1280 1281 /** 1282 * Generate a new description for this activity. This method is called 1283 * before pausing the activity and can, if desired, return some textual 1284 * description of its current state to be displayed to the user. 1285 * 1286 * <p>The default implementation returns null, which will cause you to 1287 * inherit the description from the previous activity. If all activities 1288 * return null, generally the label of the top activity will be used as the 1289 * description. 1290 * 1291 * @return A description of what the user is doing. It should be short and 1292 * sweet (only a few words). 1293 * 1294 * @see #onCreateThumbnail 1295 * @see #onSaveInstanceState 1296 * @see #onPause 1297 */ 1298 public CharSequence onCreateDescription() { 1299 return null; 1300 } 1301 1302 /** 1303 * Called when you are no longer visible to the user. You will next 1304 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1305 * depending on later user activity. 1306 * 1307 * <p>Note that this method may never be called, in low memory situations 1308 * where the system does not have enough memory to keep your activity's 1309 * process running after its {@link #onPause} method is called. 1310 * 1311 * <p><em>Derived classes must call through to the super class's 1312 * implementation of this method. If they do not, an exception will be 1313 * thrown.</em></p> 1314 * 1315 * @see #onRestart 1316 * @see #onResume 1317 * @see #onSaveInstanceState 1318 * @see #onDestroy 1319 */ 1320 protected void onStop() { 1321 mCalled = true; 1322 } 1323 1324 /** 1325 * Perform any final cleanup before an activity is destroyed. This can 1326 * happen either because the activity is finishing (someone called 1327 * {@link #finish} on it, or because the system is temporarily destroying 1328 * this instance of the activity to save space. You can distinguish 1329 * between these two scenarios with the {@link #isFinishing} method. 1330 * 1331 * <p><em>Note: do not count on this method being called as a place for 1332 * saving data! For example, if an activity is editing data in a content 1333 * provider, those edits should be committed in either {@link #onPause} or 1334 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1335 * free resources like threads that are associated with an activity, so 1336 * that a destroyed activity does not leave such things around while the 1337 * rest of its application is still running. There are situations where 1338 * the system will simply kill the activity's hosting process without 1339 * calling this method (or any others) in it, so it should not be used to 1340 * do things that are intended to remain around after the process goes 1341 * away. 1342 * 1343 * <p><em>Derived classes must call through to the super class's 1344 * implementation of this method. If they do not, an exception will be 1345 * thrown.</em></p> 1346 * 1347 * @see #onPause 1348 * @see #onStop 1349 * @see #finish 1350 * @see #isFinishing 1351 */ 1352 protected void onDestroy() { 1353 mCalled = true; 1354 1355 // dismiss any dialogs we are managing. 1356 if (mManagedDialogs != null) { 1357 final int numDialogs = mManagedDialogs.size(); 1358 for (int i = 0; i < numDialogs; i++) { 1359 final ManagedDialog md = mManagedDialogs.valueAt(i); 1360 if (md.mDialog.isShowing()) { 1361 md.mDialog.dismiss(); 1362 } 1363 } 1364 mManagedDialogs = null; 1365 } 1366 1367 // close any cursors we are managing. 1368 synchronized (mManagedCursors) { 1369 int numCursors = mManagedCursors.size(); 1370 for (int i = 0; i < numCursors; i++) { 1371 ManagedCursor c = mManagedCursors.get(i); 1372 if (c != null) { 1373 c.mCursor.close(); 1374 } 1375 } 1376 mManagedCursors.clear(); 1377 } 1378 1379 // Close any open search dialog 1380 if (mSearchManager != null) { 1381 mSearchManager.stopSearch(); 1382 } 1383 } 1384 1385 /** 1386 * Called by the system when the device configuration changes while your 1387 * activity is running. Note that this will <em>only</em> be called if 1388 * you have selected configurations you would like to handle with the 1389 * {@link android.R.attr#configChanges} attribute in your manifest. If 1390 * any configuration change occurs that is not selected to be reported 1391 * by that attribute, then instead of reporting it the system will stop 1392 * and restart the activity (to have it launched with the new 1393 * configuration). 1394 * 1395 * <p>At the time that this function has been called, your Resources 1396 * object will have been updated to return resource values matching the 1397 * new configuration. 1398 * 1399 * @param newConfig The new device configuration. 1400 */ 1401 public void onConfigurationChanged(Configuration newConfig) { 1402 mCalled = true; 1403 1404 mFragments.dispatchConfigurationChanged(newConfig); 1405 1406 if (mWindow != null) { 1407 // Pass the configuration changed event to the window 1408 mWindow.onConfigurationChanged(newConfig); 1409 } 1410 } 1411 1412 /** 1413 * If this activity is being destroyed because it can not handle a 1414 * configuration parameter being changed (and thus its 1415 * {@link #onConfigurationChanged(Configuration)} method is 1416 * <em>not</em> being called), then you can use this method to discover 1417 * the set of changes that have occurred while in the process of being 1418 * destroyed. Note that there is no guarantee that these will be 1419 * accurate (other changes could have happened at any time), so you should 1420 * only use this as an optimization hint. 1421 * 1422 * @return Returns a bit field of the configuration parameters that are 1423 * changing, as defined by the {@link android.content.res.Configuration} 1424 * class. 1425 */ 1426 public int getChangingConfigurations() { 1427 return mConfigChangeFlags; 1428 } 1429 1430 /** 1431 * Retrieve the non-configuration instance data that was previously 1432 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1433 * be available from the initial {@link #onCreate} and 1434 * {@link #onStart} calls to the new instance, allowing you to extract 1435 * any useful dynamic state from the previous instance. 1436 * 1437 * <p>Note that the data you retrieve here should <em>only</em> be used 1438 * as an optimization for handling configuration changes. You should always 1439 * be able to handle getting a null pointer back, and an activity must 1440 * still be able to restore itself to its previous state (through the 1441 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1442 * function returns null. 1443 * 1444 * @return Returns the object previously returned by 1445 * {@link #onRetainNonConfigurationInstance()}. 1446 */ 1447 public Object getLastNonConfigurationInstance() { 1448 return mLastNonConfigurationInstances != null 1449 ? mLastNonConfigurationInstances.activity : null; 1450 } 1451 1452 /** 1453 * Called by the system, as part of destroying an 1454 * activity due to a configuration change, when it is known that a new 1455 * instance will immediately be created for the new configuration. You 1456 * can return any object you like here, including the activity instance 1457 * itself, which can later be retrieved by calling 1458 * {@link #getLastNonConfigurationInstance()} in the new activity 1459 * instance. 1460 * 1461 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1462 * or later, consider instead using a {@link Fragment} with 1463 * {@link Fragment#setRetainInstance(boolean) 1464 * Fragment.setRetainInstance(boolean}.</em> 1465 * 1466 * <p>This function is called purely as an optimization, and you must 1467 * not rely on it being called. When it is called, a number of guarantees 1468 * will be made to help optimize configuration switching: 1469 * <ul> 1470 * <li> The function will be called between {@link #onStop} and 1471 * {@link #onDestroy}. 1472 * <li> A new instance of the activity will <em>always</em> be immediately 1473 * created after this one's {@link #onDestroy()} is called. In particular, 1474 * <em>no</em> messages will be dispatched during this time (when the returned 1475 * object does not have an activity to be associated with). 1476 * <li> The object you return here will <em>always</em> be available from 1477 * the {@link #getLastNonConfigurationInstance()} method of the following 1478 * activity instance as described there. 1479 * </ul> 1480 * 1481 * <p>These guarantees are designed so that an activity can use this API 1482 * to propagate extensive state from the old to new activity instance, from 1483 * loaded bitmaps, to network connections, to evenly actively running 1484 * threads. Note that you should <em>not</em> propagate any data that 1485 * may change based on the configuration, including any data loaded from 1486 * resources such as strings, layouts, or drawables. 1487 * 1488 * <p>The guarantee of no message handling during the switch to the next 1489 * activity simplifies use with active objects. For example if your retained 1490 * state is an {@link android.os.AsyncTask} you are guaranteed that its 1491 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 1492 * not be called from the call here until you execute the next instance's 1493 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 1494 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 1495 * running in a separate thread.) 1496 * 1497 * @return Return any Object holding the desired state to propagate to the 1498 * next activity instance. 1499 */ 1500 public Object onRetainNonConfigurationInstance() { 1501 return null; 1502 } 1503 1504 /** 1505 * Retrieve the non-configuration instance data that was previously 1506 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1507 * be available from the initial {@link #onCreate} and 1508 * {@link #onStart} calls to the new instance, allowing you to extract 1509 * any useful dynamic state from the previous instance. 1510 * 1511 * <p>Note that the data you retrieve here should <em>only</em> be used 1512 * as an optimization for handling configuration changes. You should always 1513 * be able to handle getting a null pointer back, and an activity must 1514 * still be able to restore itself to its previous state (through the 1515 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1516 * function returns null. 1517 * 1518 * @return Returns the object previously returned by 1519 * {@link #onRetainNonConfigurationChildInstances()} 1520 */ 1521 HashMap<String, Object> getLastNonConfigurationChildInstances() { 1522 return mLastNonConfigurationInstances != null 1523 ? mLastNonConfigurationInstances.children : null; 1524 } 1525 1526 /** 1527 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1528 * it should return either a mapping from child activity id strings to arbitrary objects, 1529 * or null. This method is intended to be used by Activity framework subclasses that control a 1530 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1531 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1532 */ 1533 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1534 return null; 1535 } 1536 1537 NonConfigurationInstances retainNonConfigurationInstances() { 1538 Object activity = onRetainNonConfigurationInstance(); 1539 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 1540 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 1541 boolean retainLoaders = false; 1542 if (mAllLoaderManagers != null) { 1543 // prune out any loader managers that were already stopped and so 1544 // have nothing useful to retain. 1545 for (int i=mAllLoaderManagers.size()-1; i>=0; i--) { 1546 LoaderManagerImpl lm = mAllLoaderManagers.valueAt(i); 1547 if (lm.mRetaining) { 1548 retainLoaders = true; 1549 } else { 1550 lm.doDestroy(); 1551 mAllLoaderManagers.removeAt(i); 1552 } 1553 } 1554 } 1555 if (activity == null && children == null && fragments == null && !retainLoaders) { 1556 return null; 1557 } 1558 1559 NonConfigurationInstances nci = new NonConfigurationInstances(); 1560 nci.activity = activity; 1561 nci.children = children; 1562 nci.fragments = fragments; 1563 nci.loaders = mAllLoaderManagers; 1564 return nci; 1565 } 1566 1567 public void onLowMemory() { 1568 mCalled = true; 1569 mFragments.dispatchLowMemory(); 1570 } 1571 1572 /** 1573 * Return the FragmentManager for interacting with fragments associated 1574 * with this activity. 1575 */ 1576 public FragmentManager getFragmentManager() { 1577 return mFragments; 1578 } 1579 1580 void invalidateFragmentIndex(int index) { 1581 //Log.v(TAG, "invalidateFragmentIndex: index=" + index); 1582 if (mAllLoaderManagers != null) { 1583 LoaderManagerImpl lm = mAllLoaderManagers.get(index); 1584 if (lm != null) { 1585 lm.doDestroy(); 1586 } 1587 mAllLoaderManagers.remove(index); 1588 } 1589 } 1590 1591 /** 1592 * Called when a Fragment is being attached to this activity, immediately 1593 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 1594 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 1595 */ 1596 public void onAttachFragment(Fragment fragment) { 1597 } 1598 1599 /** 1600 * Wrapper around 1601 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1602 * that gives the resulting {@link Cursor} to call 1603 * {@link #startManagingCursor} so that the activity will manage its 1604 * lifecycle for you. 1605 * 1606 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1607 * or later, consider instead using {@link LoaderManager} instead, available 1608 * via {@link #getLoaderManager()}.</em> 1609 * 1610 * @param uri The URI of the content provider to query. 1611 * @param projection List of columns to return. 1612 * @param selection SQL WHERE clause. 1613 * @param sortOrder SQL ORDER BY clause. 1614 * 1615 * @return The Cursor that was returned by query(). 1616 * 1617 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1618 * @see #startManagingCursor 1619 * @hide 1620 * 1621 * @deprecated Use {@link CursorLoader} instead. 1622 */ 1623 @Deprecated 1624 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1625 String sortOrder) { 1626 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1627 if (c != null) { 1628 startManagingCursor(c); 1629 } 1630 return c; 1631 } 1632 1633 /** 1634 * Wrapper around 1635 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1636 * that gives the resulting {@link Cursor} to call 1637 * {@link #startManagingCursor} so that the activity will manage its 1638 * lifecycle for you. 1639 * 1640 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1641 * or later, consider instead using {@link LoaderManager} instead, available 1642 * via {@link #getLoaderManager()}.</em> 1643 * 1644 * @param uri The URI of the content provider to query. 1645 * @param projection List of columns to return. 1646 * @param selection SQL WHERE clause. 1647 * @param selectionArgs The arguments to selection, if any ?s are pesent 1648 * @param sortOrder SQL ORDER BY clause. 1649 * 1650 * @return The Cursor that was returned by query(). 1651 * 1652 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1653 * @see #startManagingCursor 1654 * 1655 * @deprecated Use {@link CursorLoader} instead. 1656 */ 1657 @Deprecated 1658 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1659 String[] selectionArgs, String sortOrder) { 1660 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1661 if (c != null) { 1662 startManagingCursor(c); 1663 } 1664 return c; 1665 } 1666 1667 /** 1668 * This method allows the activity to take care of managing the given 1669 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1670 * That is, when the activity is stopped it will automatically call 1671 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1672 * it will call {@link Cursor#requery} for you. When the activity is 1673 * destroyed, all managed Cursors will be closed automatically. 1674 * 1675 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1676 * or later, consider instead using {@link LoaderManager} instead, available 1677 * via {@link #getLoaderManager()}.</em> 1678 * 1679 * @param c The Cursor to be managed. 1680 * 1681 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1682 * @see #stopManagingCursor 1683 * 1684 * @deprecated Use {@link CursorLoader} instead. 1685 */ 1686 @Deprecated 1687 public void startManagingCursor(Cursor c) { 1688 synchronized (mManagedCursors) { 1689 mManagedCursors.add(new ManagedCursor(c)); 1690 } 1691 } 1692 1693 /** 1694 * Given a Cursor that was previously given to 1695 * {@link #startManagingCursor}, stop the activity's management of that 1696 * cursor. 1697 * 1698 * @param c The Cursor that was being managed. 1699 * 1700 * @see #startManagingCursor 1701 * 1702 * @deprecated Use {@link CursorLoader} instead. 1703 */ 1704 @Deprecated 1705 public void stopManagingCursor(Cursor c) { 1706 synchronized (mManagedCursors) { 1707 final int N = mManagedCursors.size(); 1708 for (int i=0; i<N; i++) { 1709 ManagedCursor mc = mManagedCursors.get(i); 1710 if (mc.mCursor == c) { 1711 mManagedCursors.remove(i); 1712 break; 1713 } 1714 } 1715 } 1716 } 1717 1718 /** 1719 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 1720 * this is a no-op. 1721 * @hide 1722 */ 1723 @Deprecated 1724 public void setPersistent(boolean isPersistent) { 1725 } 1726 1727 /** 1728 * Finds a view that was identified by the id attribute from the XML that 1729 * was processed in {@link #onCreate}. 1730 * 1731 * @return The view if found or null otherwise. 1732 */ 1733 public View findViewById(int id) { 1734 return getWindow().findViewById(id); 1735 } 1736 1737 /** 1738 * Retrieve a reference to this activity's ActionBar. 1739 * 1740 * @return The Activity's ActionBar, or null if it does not have one. 1741 */ 1742 public ActionBar getActionBar() { 1743 initActionBar(); 1744 return mActionBar; 1745 } 1746 1747 /** 1748 * Creates a new ActionBar, locates the inflated ActionBarView, 1749 * initializes the ActionBar with the view, and sets mActionBar. 1750 */ 1751 private void initActionBar() { 1752 Window window = getWindow(); 1753 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 1754 return; 1755 } 1756 1757 mActionBar = new ActionBarImpl(this); 1758 } 1759 1760 /** 1761 * Set the activity content from a layout resource. The resource will be 1762 * inflated, adding all top-level views to the activity. 1763 * 1764 * @param layoutResID Resource ID to be inflated. 1765 */ 1766 public void setContentView(int layoutResID) { 1767 getWindow().setContentView(layoutResID); 1768 initActionBar(); 1769 } 1770 1771 /** 1772 * Set the activity content to an explicit view. This view is placed 1773 * directly into the activity's view hierarchy. It can itself be a complex 1774 * view hierarhcy. 1775 * 1776 * @param view The desired content to display. 1777 */ 1778 public void setContentView(View view) { 1779 getWindow().setContentView(view); 1780 initActionBar(); 1781 } 1782 1783 /** 1784 * Set the activity content to an explicit view. This view is placed 1785 * directly into the activity's view hierarchy. It can itself be a complex 1786 * view hierarhcy. 1787 * 1788 * @param view The desired content to display. 1789 * @param params Layout parameters for the view. 1790 */ 1791 public void setContentView(View view, ViewGroup.LayoutParams params) { 1792 getWindow().setContentView(view, params); 1793 initActionBar(); 1794 } 1795 1796 /** 1797 * Add an additional content view to the activity. Added after any existing 1798 * ones in the activity -- existing views are NOT removed. 1799 * 1800 * @param view The desired content to display. 1801 * @param params Layout parameters for the view. 1802 */ 1803 public void addContentView(View view, ViewGroup.LayoutParams params) { 1804 getWindow().addContentView(view, params); 1805 initActionBar(); 1806 } 1807 1808 /** 1809 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1810 * keys. 1811 * 1812 * @see #setDefaultKeyMode 1813 */ 1814 static public final int DEFAULT_KEYS_DISABLE = 0; 1815 /** 1816 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1817 * key handling. 1818 * 1819 * @see #setDefaultKeyMode 1820 */ 1821 static public final int DEFAULT_KEYS_DIALER = 1; 1822 /** 1823 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1824 * default key handling. 1825 * 1826 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1827 * 1828 * @see #setDefaultKeyMode 1829 */ 1830 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1831 /** 1832 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1833 * will start an application-defined search. (If the application or activity does not 1834 * actually define a search, the the keys will be ignored.) 1835 * 1836 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1837 * 1838 * @see #setDefaultKeyMode 1839 */ 1840 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1841 1842 /** 1843 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1844 * will start a global search (typically web search, but some platforms may define alternate 1845 * methods for global search) 1846 * 1847 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1848 * 1849 * @see #setDefaultKeyMode 1850 */ 1851 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1852 1853 /** 1854 * Select the default key handling for this activity. This controls what 1855 * will happen to key events that are not otherwise handled. The default 1856 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1857 * floor. Other modes allow you to launch the dialer 1858 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1859 * menu without requiring the menu key be held down 1860 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1861 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1862 * 1863 * <p>Note that the mode selected here does not impact the default 1864 * handling of system keys, such as the "back" and "menu" keys, and your 1865 * activity and its views always get a first chance to receive and handle 1866 * all application keys. 1867 * 1868 * @param mode The desired default key mode constant. 1869 * 1870 * @see #DEFAULT_KEYS_DISABLE 1871 * @see #DEFAULT_KEYS_DIALER 1872 * @see #DEFAULT_KEYS_SHORTCUT 1873 * @see #DEFAULT_KEYS_SEARCH_LOCAL 1874 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 1875 * @see #onKeyDown 1876 */ 1877 public final void setDefaultKeyMode(int mode) { 1878 mDefaultKeyMode = mode; 1879 1880 // Some modes use a SpannableStringBuilder to track & dispatch input events 1881 // This list must remain in sync with the switch in onKeyDown() 1882 switch (mode) { 1883 case DEFAULT_KEYS_DISABLE: 1884 case DEFAULT_KEYS_SHORTCUT: 1885 mDefaultKeySsb = null; // not used in these modes 1886 break; 1887 case DEFAULT_KEYS_DIALER: 1888 case DEFAULT_KEYS_SEARCH_LOCAL: 1889 case DEFAULT_KEYS_SEARCH_GLOBAL: 1890 mDefaultKeySsb = new SpannableStringBuilder(); 1891 Selection.setSelection(mDefaultKeySsb,0); 1892 break; 1893 default: 1894 throw new IllegalArgumentException(); 1895 } 1896 } 1897 1898 /** 1899 * Called when a key was pressed down and not handled by any of the views 1900 * inside of the activity. So, for example, key presses while the cursor 1901 * is inside a TextView will not trigger the event (unless it is a navigation 1902 * to another object) because TextView handles its own key presses. 1903 * 1904 * <p>If the focused view didn't want this event, this method is called. 1905 * 1906 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 1907 * by calling {@link #onBackPressed()}, though the behavior varies based 1908 * on the application compatibility mode: for 1909 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 1910 * it will set up the dispatch to call {@link #onKeyUp} where the action 1911 * will be performed; for earlier applications, it will perform the 1912 * action immediately in on-down, as those versions of the platform 1913 * behaved. 1914 * 1915 * <p>Other additional default key handling may be performed 1916 * if configured with {@link #setDefaultKeyMode}. 1917 * 1918 * @return Return <code>true</code> to prevent this event from being propagated 1919 * further, or <code>false</code> to indicate that you have not handled 1920 * this event and it should continue to be propagated. 1921 * @see #onKeyUp 1922 * @see android.view.KeyEvent 1923 */ 1924 public boolean onKeyDown(int keyCode, KeyEvent event) { 1925 if (keyCode == KeyEvent.KEYCODE_BACK) { 1926 if (getApplicationInfo().targetSdkVersion 1927 >= Build.VERSION_CODES.ECLAIR) { 1928 event.startTracking(); 1929 } else { 1930 onBackPressed(); 1931 } 1932 return true; 1933 } 1934 1935 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 1936 return false; 1937 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 1938 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 1939 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 1940 return true; 1941 } 1942 return false; 1943 } else { 1944 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 1945 boolean clearSpannable = false; 1946 boolean handled; 1947 if ((event.getRepeatCount() != 0) || event.isSystem()) { 1948 clearSpannable = true; 1949 handled = false; 1950 } else { 1951 handled = TextKeyListener.getInstance().onKeyDown( 1952 null, mDefaultKeySsb, keyCode, event); 1953 if (handled && mDefaultKeySsb.length() > 0) { 1954 // something useable has been typed - dispatch it now. 1955 1956 final String str = mDefaultKeySsb.toString(); 1957 clearSpannable = true; 1958 1959 switch (mDefaultKeyMode) { 1960 case DEFAULT_KEYS_DIALER: 1961 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 1962 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 1963 startActivity(intent); 1964 break; 1965 case DEFAULT_KEYS_SEARCH_LOCAL: 1966 startSearch(str, false, null, false); 1967 break; 1968 case DEFAULT_KEYS_SEARCH_GLOBAL: 1969 startSearch(str, false, null, true); 1970 break; 1971 } 1972 } 1973 } 1974 if (clearSpannable) { 1975 mDefaultKeySsb.clear(); 1976 mDefaultKeySsb.clearSpans(); 1977 Selection.setSelection(mDefaultKeySsb,0); 1978 } 1979 return handled; 1980 } 1981 } 1982 1983 /** 1984 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 1985 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 1986 * the event). 1987 */ 1988 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 1989 return false; 1990 } 1991 1992 /** 1993 * Called when a key was released and not handled by any of the views 1994 * inside of the activity. So, for example, key presses while the cursor 1995 * is inside a TextView will not trigger the event (unless it is a navigation 1996 * to another object) because TextView handles its own key presses. 1997 * 1998 * <p>The default implementation handles KEYCODE_BACK to stop the activity 1999 * and go back. 2000 * 2001 * @return Return <code>true</code> to prevent this event from being propagated 2002 * further, or <code>false</code> to indicate that you have not handled 2003 * this event and it should continue to be propagated. 2004 * @see #onKeyDown 2005 * @see KeyEvent 2006 */ 2007 public boolean onKeyUp(int keyCode, KeyEvent event) { 2008 if (getApplicationInfo().targetSdkVersion 2009 >= Build.VERSION_CODES.ECLAIR) { 2010 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2011 && !event.isCanceled()) { 2012 onBackPressed(); 2013 return true; 2014 } 2015 } 2016 return false; 2017 } 2018 2019 /** 2020 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2021 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2022 * the event). 2023 */ 2024 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2025 return false; 2026 } 2027 2028 /** 2029 * Called when the activity has detected the user's press of the back 2030 * key. The default implementation simply finishes the current activity, 2031 * but you can override this to do whatever you want. 2032 */ 2033 public void onBackPressed() { 2034 if (!mFragments.popBackStackImmediate()) { 2035 finish(); 2036 } 2037 } 2038 2039 /** 2040 * Called when a key shortcut event is not handled by any of the views in the Activity. 2041 * Override this method to implement global key shortcuts for the Activity. 2042 * Key shortcuts can also be implemented by setting the 2043 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2044 * 2045 * @param keyCode The value in event.getKeyCode(). 2046 * @param event Description of the key event. 2047 * @return True if the key shortcut was handled. 2048 */ 2049 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2050 return false; 2051 } 2052 2053 /** 2054 * Called when a touch screen event was not handled by any of the views 2055 * under it. This is most useful to process touch events that happen 2056 * outside of your window bounds, where there is no view to receive it. 2057 * 2058 * @param event The touch screen event being processed. 2059 * 2060 * @return Return true if you have consumed the event, false if you haven't. 2061 * The default implementation always returns false. 2062 */ 2063 public boolean onTouchEvent(MotionEvent event) { 2064 return false; 2065 } 2066 2067 /** 2068 * Called when the trackball was moved and not handled by any of the 2069 * views inside of the activity. So, for example, if the trackball moves 2070 * while focus is on a button, you will receive a call here because 2071 * buttons do not normally do anything with trackball events. The call 2072 * here happens <em>before</em> trackball movements are converted to 2073 * DPAD key events, which then get sent back to the view hierarchy, and 2074 * will be processed at the point for things like focus navigation. 2075 * 2076 * @param event The trackball event being processed. 2077 * 2078 * @return Return true if you have consumed the event, false if you haven't. 2079 * The default implementation always returns false. 2080 */ 2081 public boolean onTrackballEvent(MotionEvent event) { 2082 return false; 2083 } 2084 2085 /** 2086 * Called when a generic motion event was not handled by any of the 2087 * views inside of the activity. 2088 * <p> 2089 * Generic motion events are dispatched to the focused view to describe 2090 * the motions of input devices such as joysticks. The 2091 * {@link MotionEvent#getSource() source} of the motion event specifies 2092 * the class of input that was received. Implementations of this method 2093 * must examine the bits in the source before processing the event. 2094 * The following code example shows how this is done. 2095 * </p> 2096 * <code> 2097 * public boolean onGenericMotionEvent(MotionEvent event) { 2098 * if ((event.getSource() & InputDevice.SOURCE_CLASS_JOYSTICK) != 0) { 2099 * float x = event.getX(); 2100 * float y = event.getY(); 2101 * // process the joystick motion 2102 * return true; 2103 * } 2104 * return super.onGenericMotionEvent(event); 2105 * } 2106 * </code> 2107 * 2108 * @param event The generic motion event being processed. 2109 * 2110 * @return Return true if you have consumed the event, false if you haven't. 2111 * The default implementation always returns false. 2112 */ 2113 public boolean onGenericMotionEvent(MotionEvent event) { 2114 return false; 2115 } 2116 2117 /** 2118 * Called whenever a key, touch, or trackball event is dispatched to the 2119 * activity. Implement this method if you wish to know that the user has 2120 * interacted with the device in some way while your activity is running. 2121 * This callback and {@link #onUserLeaveHint} are intended to help 2122 * activities manage status bar notifications intelligently; specifically, 2123 * for helping activities determine the proper time to cancel a notfication. 2124 * 2125 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2126 * be accompanied by calls to {@link #onUserInteraction}. This 2127 * ensures that your activity will be told of relevant user activity such 2128 * as pulling down the notification pane and touching an item there. 2129 * 2130 * <p>Note that this callback will be invoked for the touch down action 2131 * that begins a touch gesture, but may not be invoked for the touch-moved 2132 * and touch-up actions that follow. 2133 * 2134 * @see #onUserLeaveHint() 2135 */ 2136 public void onUserInteraction() { 2137 } 2138 2139 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2140 // Update window manager if: we have a view, that view is 2141 // attached to its parent (which will be a RootView), and 2142 // this activity is not embedded. 2143 if (mParent == null) { 2144 View decor = mDecor; 2145 if (decor != null && decor.getParent() != null) { 2146 getWindowManager().updateViewLayout(decor, params); 2147 } 2148 } 2149 } 2150 2151 public void onContentChanged() { 2152 } 2153 2154 /** 2155 * Called when the current {@link Window} of the activity gains or loses 2156 * focus. This is the best indicator of whether this activity is visible 2157 * to the user. The default implementation clears the key tracking 2158 * state, so should always be called. 2159 * 2160 * <p>Note that this provides information about global focus state, which 2161 * is managed independently of activity lifecycles. As such, while focus 2162 * changes will generally have some relation to lifecycle changes (an 2163 * activity that is stopped will not generally get window focus), you 2164 * should not rely on any particular order between the callbacks here and 2165 * those in the other lifecycle methods such as {@link #onResume}. 2166 * 2167 * <p>As a general rule, however, a resumed activity will have window 2168 * focus... unless it has displayed other dialogs or popups that take 2169 * input focus, in which case the activity itself will not have focus 2170 * when the other windows have it. Likewise, the system may display 2171 * system-level windows (such as the status bar notification panel or 2172 * a system alert) which will temporarily take window input focus without 2173 * pausing the foreground activity. 2174 * 2175 * @param hasFocus Whether the window of this activity has focus. 2176 * 2177 * @see #hasWindowFocus() 2178 * @see #onResume 2179 * @see View#onWindowFocusChanged(boolean) 2180 */ 2181 public void onWindowFocusChanged(boolean hasFocus) { 2182 } 2183 2184 /** 2185 * Called when the main window associated with the activity has been 2186 * attached to the window manager. 2187 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2188 * for more information. 2189 * @see View#onAttachedToWindow 2190 */ 2191 public void onAttachedToWindow() { 2192 } 2193 2194 /** 2195 * Called when the main window associated with the activity has been 2196 * detached from the window manager. 2197 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2198 * for more information. 2199 * @see View#onDetachedFromWindow 2200 */ 2201 public void onDetachedFromWindow() { 2202 } 2203 2204 /** 2205 * Returns true if this activity's <em>main</em> window currently has window focus. 2206 * Note that this is not the same as the view itself having focus. 2207 * 2208 * @return True if this activity's main window currently has window focus. 2209 * 2210 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2211 */ 2212 public boolean hasWindowFocus() { 2213 Window w = getWindow(); 2214 if (w != null) { 2215 View d = w.getDecorView(); 2216 if (d != null) { 2217 return d.hasWindowFocus(); 2218 } 2219 } 2220 return false; 2221 } 2222 2223 /** 2224 * Called to process key events. You can override this to intercept all 2225 * key events before they are dispatched to the window. Be sure to call 2226 * this implementation for key events that should be handled normally. 2227 * 2228 * @param event The key event. 2229 * 2230 * @return boolean Return true if this event was consumed. 2231 */ 2232 public boolean dispatchKeyEvent(KeyEvent event) { 2233 onUserInteraction(); 2234 Window win = getWindow(); 2235 if (win.superDispatchKeyEvent(event)) { 2236 return true; 2237 } 2238 View decor = mDecor; 2239 if (decor == null) decor = win.getDecorView(); 2240 return event.dispatch(this, decor != null 2241 ? decor.getKeyDispatcherState() : null, this); 2242 } 2243 2244 /** 2245 * Called to process a key shortcut event. 2246 * You can override this to intercept all key shortcut events before they are 2247 * dispatched to the window. Be sure to call this implementation for key shortcut 2248 * events that should be handled normally. 2249 * 2250 * @param event The key shortcut event. 2251 * @return True if this event was consumed. 2252 */ 2253 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 2254 onUserInteraction(); 2255 if (getWindow().superDispatchKeyShortcutEvent(event)) { 2256 return true; 2257 } 2258 return onKeyShortcut(event.getKeyCode(), event); 2259 } 2260 2261 /** 2262 * Called to process touch screen events. You can override this to 2263 * intercept all touch screen events before they are dispatched to the 2264 * window. Be sure to call this implementation for touch screen events 2265 * that should be handled normally. 2266 * 2267 * @param ev The touch screen event. 2268 * 2269 * @return boolean Return true if this event was consumed. 2270 */ 2271 public boolean dispatchTouchEvent(MotionEvent ev) { 2272 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2273 onUserInteraction(); 2274 } 2275 if (getWindow().superDispatchTouchEvent(ev)) { 2276 return true; 2277 } 2278 return onTouchEvent(ev); 2279 } 2280 2281 /** 2282 * Called to process trackball events. You can override this to 2283 * intercept all trackball events before they are dispatched to the 2284 * window. Be sure to call this implementation for trackball events 2285 * that should be handled normally. 2286 * 2287 * @param ev The trackball event. 2288 * 2289 * @return boolean Return true if this event was consumed. 2290 */ 2291 public boolean dispatchTrackballEvent(MotionEvent ev) { 2292 onUserInteraction(); 2293 if (getWindow().superDispatchTrackballEvent(ev)) { 2294 return true; 2295 } 2296 return onTrackballEvent(ev); 2297 } 2298 2299 /** 2300 * Called to process generic motion events. You can override this to 2301 * intercept all generic motion events before they are dispatched to the 2302 * window. Be sure to call this implementation for generic motion events 2303 * that should be handled normally. 2304 * 2305 * @param ev The generic motion event. 2306 * 2307 * @return boolean Return true if this event was consumed. 2308 */ 2309 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 2310 onUserInteraction(); 2311 if (getWindow().superDispatchGenericMotionEvent(ev)) { 2312 return true; 2313 } 2314 return onGenericMotionEvent(ev); 2315 } 2316 2317 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2318 event.setClassName(getClass().getName()); 2319 event.setPackageName(getPackageName()); 2320 2321 LayoutParams params = getWindow().getAttributes(); 2322 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2323 (params.height == LayoutParams.MATCH_PARENT); 2324 event.setFullScreen(isFullScreen); 2325 2326 CharSequence title = getTitle(); 2327 if (!TextUtils.isEmpty(title)) { 2328 event.getText().add(title); 2329 } 2330 2331 return true; 2332 } 2333 2334 /** 2335 * Default implementation of 2336 * {@link android.view.Window.Callback#onCreatePanelView} 2337 * for activities. This 2338 * simply returns null so that all panel sub-windows will have the default 2339 * menu behavior. 2340 */ 2341 public View onCreatePanelView(int featureId) { 2342 return null; 2343 } 2344 2345 /** 2346 * Default implementation of 2347 * {@link android.view.Window.Callback#onCreatePanelMenu} 2348 * for activities. This calls through to the new 2349 * {@link #onCreateOptionsMenu} method for the 2350 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2351 * so that subclasses of Activity don't need to deal with feature codes. 2352 */ 2353 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2354 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2355 boolean show = onCreateOptionsMenu(menu); 2356 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 2357 return show; 2358 } 2359 return false; 2360 } 2361 2362 /** 2363 * Default implementation of 2364 * {@link android.view.Window.Callback#onPreparePanel} 2365 * for activities. This 2366 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2367 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2368 * panel, so that subclasses of 2369 * Activity don't need to deal with feature codes. 2370 */ 2371 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2372 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2373 boolean goforit = onPrepareOptionsMenu(menu); 2374 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 2375 return goforit && menu.hasVisibleItems(); 2376 } 2377 return true; 2378 } 2379 2380 /** 2381 * {@inheritDoc} 2382 * 2383 * @return The default implementation returns true. 2384 */ 2385 public boolean onMenuOpened(int featureId, Menu menu) { 2386 if (featureId == Window.FEATURE_ACTION_BAR) { 2387 if (mActionBar != null) { 2388 mActionBar.dispatchMenuVisibilityChanged(true); 2389 } else { 2390 Log.e(TAG, "Tried to open action bar menu with no action bar"); 2391 } 2392 } 2393 return true; 2394 } 2395 2396 /** 2397 * Default implementation of 2398 * {@link android.view.Window.Callback#onMenuItemSelected} 2399 * for activities. This calls through to the new 2400 * {@link #onOptionsItemSelected} method for the 2401 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2402 * panel, so that subclasses of 2403 * Activity don't need to deal with feature codes. 2404 */ 2405 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2406 switch (featureId) { 2407 case Window.FEATURE_OPTIONS_PANEL: 2408 // Put event logging here so it gets called even if subclass 2409 // doesn't call through to superclass's implmeentation of each 2410 // of these methods below 2411 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2412 if (onOptionsItemSelected(item)) { 2413 return true; 2414 } 2415 return mFragments.dispatchOptionsItemSelected(item); 2416 2417 case Window.FEATURE_CONTEXT_MENU: 2418 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2419 if (onContextItemSelected(item)) { 2420 return true; 2421 } 2422 return mFragments.dispatchContextItemSelected(item); 2423 2424 default: 2425 return false; 2426 } 2427 } 2428 2429 /** 2430 * Default implementation of 2431 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2432 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2433 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2434 * so that subclasses of Activity don't need to deal with feature codes. 2435 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2436 * {@link #onContextMenuClosed(Menu)} will be called. 2437 */ 2438 public void onPanelClosed(int featureId, Menu menu) { 2439 switch (featureId) { 2440 case Window.FEATURE_OPTIONS_PANEL: 2441 mFragments.dispatchOptionsMenuClosed(menu); 2442 onOptionsMenuClosed(menu); 2443 break; 2444 2445 case Window.FEATURE_CONTEXT_MENU: 2446 onContextMenuClosed(menu); 2447 break; 2448 2449 case Window.FEATURE_ACTION_BAR: 2450 mActionBar.dispatchMenuVisibilityChanged(false); 2451 break; 2452 } 2453 } 2454 2455 /** 2456 * Declare that the options menu has changed, so should be recreated. 2457 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 2458 * time it needs to be displayed. 2459 */ 2460 public void invalidateOptionsMenu() { 2461 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 2462 } 2463 2464 /** 2465 * Initialize the contents of the Activity's standard options menu. You 2466 * should place your menu items in to <var>menu</var>. 2467 * 2468 * <p>This is only called once, the first time the options menu is 2469 * displayed. To update the menu every time it is displayed, see 2470 * {@link #onPrepareOptionsMenu}. 2471 * 2472 * <p>The default implementation populates the menu with standard system 2473 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2474 * they will be correctly ordered with application-defined menu items. 2475 * Deriving classes should always call through to the base implementation. 2476 * 2477 * <p>You can safely hold on to <var>menu</var> (and any items created 2478 * from it), making modifications to it as desired, until the next 2479 * time onCreateOptionsMenu() is called. 2480 * 2481 * <p>When you add items to the menu, you can implement the Activity's 2482 * {@link #onOptionsItemSelected} method to handle them there. 2483 * 2484 * @param menu The options menu in which you place your items. 2485 * 2486 * @return You must return true for the menu to be displayed; 2487 * if you return false it will not be shown. 2488 * 2489 * @see #onPrepareOptionsMenu 2490 * @see #onOptionsItemSelected 2491 */ 2492 public boolean onCreateOptionsMenu(Menu menu) { 2493 if (mParent != null) { 2494 return mParent.onCreateOptionsMenu(menu); 2495 } 2496 return true; 2497 } 2498 2499 /** 2500 * Prepare the Screen's standard options menu to be displayed. This is 2501 * called right before the menu is shown, every time it is shown. You can 2502 * use this method to efficiently enable/disable items or otherwise 2503 * dynamically modify the contents. 2504 * 2505 * <p>The default implementation updates the system menu items based on the 2506 * activity's state. Deriving classes should always call through to the 2507 * base class implementation. 2508 * 2509 * @param menu The options menu as last shown or first initialized by 2510 * onCreateOptionsMenu(). 2511 * 2512 * @return You must return true for the menu to be displayed; 2513 * if you return false it will not be shown. 2514 * 2515 * @see #onCreateOptionsMenu 2516 */ 2517 public boolean onPrepareOptionsMenu(Menu menu) { 2518 if (mParent != null) { 2519 return mParent.onPrepareOptionsMenu(menu); 2520 } 2521 return true; 2522 } 2523 2524 /** 2525 * This hook is called whenever an item in your options menu is selected. 2526 * The default implementation simply returns false to have the normal 2527 * processing happen (calling the item's Runnable or sending a message to 2528 * its Handler as appropriate). You can use this method for any items 2529 * for which you would like to do processing without those other 2530 * facilities. 2531 * 2532 * <p>Derived classes should call through to the base class for it to 2533 * perform the default menu handling. 2534 * 2535 * @param item The menu item that was selected. 2536 * 2537 * @return boolean Return false to allow normal menu processing to 2538 * proceed, true to consume it here. 2539 * 2540 * @see #onCreateOptionsMenu 2541 */ 2542 public boolean onOptionsItemSelected(MenuItem item) { 2543 if (mParent != null) { 2544 return mParent.onOptionsItemSelected(item); 2545 } 2546 return false; 2547 } 2548 2549 /** 2550 * This hook is called whenever the options menu is being closed (either by the user canceling 2551 * the menu with the back/menu button, or when an item is selected). 2552 * 2553 * @param menu The options menu as last shown or first initialized by 2554 * onCreateOptionsMenu(). 2555 */ 2556 public void onOptionsMenuClosed(Menu menu) { 2557 if (mParent != null) { 2558 mParent.onOptionsMenuClosed(menu); 2559 } 2560 } 2561 2562 /** 2563 * Programmatically opens the options menu. If the options menu is already 2564 * open, this method does nothing. 2565 */ 2566 public void openOptionsMenu() { 2567 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2568 } 2569 2570 /** 2571 * Progammatically closes the options menu. If the options menu is already 2572 * closed, this method does nothing. 2573 */ 2574 public void closeOptionsMenu() { 2575 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2576 } 2577 2578 /** 2579 * Called when a context menu for the {@code view} is about to be shown. 2580 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2581 * time the context menu is about to be shown and should be populated for 2582 * the view (or item inside the view for {@link AdapterView} subclasses, 2583 * this can be found in the {@code menuInfo})). 2584 * <p> 2585 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2586 * item has been selected. 2587 * <p> 2588 * It is not safe to hold onto the context menu after this method returns. 2589 * {@inheritDoc} 2590 */ 2591 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2592 } 2593 2594 /** 2595 * Registers a context menu to be shown for the given view (multiple views 2596 * can show the context menu). This method will set the 2597 * {@link OnCreateContextMenuListener} on the view to this activity, so 2598 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2599 * called when it is time to show the context menu. 2600 * 2601 * @see #unregisterForContextMenu(View) 2602 * @param view The view that should show a context menu. 2603 */ 2604 public void registerForContextMenu(View view) { 2605 view.setOnCreateContextMenuListener(this); 2606 } 2607 2608 /** 2609 * Prevents a context menu to be shown for the given view. This method will remove the 2610 * {@link OnCreateContextMenuListener} on the view. 2611 * 2612 * @see #registerForContextMenu(View) 2613 * @param view The view that should stop showing a context menu. 2614 */ 2615 public void unregisterForContextMenu(View view) { 2616 view.setOnCreateContextMenuListener(null); 2617 } 2618 2619 /** 2620 * Programmatically opens the context menu for a particular {@code view}. 2621 * The {@code view} should have been added via 2622 * {@link #registerForContextMenu(View)}. 2623 * 2624 * @param view The view to show the context menu for. 2625 */ 2626 public void openContextMenu(View view) { 2627 view.showContextMenu(); 2628 } 2629 2630 /** 2631 * Programmatically closes the most recently opened context menu, if showing. 2632 */ 2633 public void closeContextMenu() { 2634 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2635 } 2636 2637 /** 2638 * This hook is called whenever an item in a context menu is selected. The 2639 * default implementation simply returns false to have the normal processing 2640 * happen (calling the item's Runnable or sending a message to its Handler 2641 * as appropriate). You can use this method for any items for which you 2642 * would like to do processing without those other facilities. 2643 * <p> 2644 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2645 * View that added this menu item. 2646 * <p> 2647 * Derived classes should call through to the base class for it to perform 2648 * the default menu handling. 2649 * 2650 * @param item The context menu item that was selected. 2651 * @return boolean Return false to allow normal context menu processing to 2652 * proceed, true to consume it here. 2653 */ 2654 public boolean onContextItemSelected(MenuItem item) { 2655 if (mParent != null) { 2656 return mParent.onContextItemSelected(item); 2657 } 2658 return false; 2659 } 2660 2661 /** 2662 * This hook is called whenever the context menu is being closed (either by 2663 * the user canceling the menu with the back/menu button, or when an item is 2664 * selected). 2665 * 2666 * @param menu The context menu that is being closed. 2667 */ 2668 public void onContextMenuClosed(Menu menu) { 2669 if (mParent != null) { 2670 mParent.onContextMenuClosed(menu); 2671 } 2672 } 2673 2674 /** 2675 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2676 */ 2677 @Deprecated 2678 protected Dialog onCreateDialog(int id) { 2679 return null; 2680 } 2681 2682 /** 2683 * Callback for creating dialogs that are managed (saved and restored) for you 2684 * by the activity. The default implementation calls through to 2685 * {@link #onCreateDialog(int)} for compatibility. 2686 * 2687 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2688 * or later, consider instead using a {@link DialogFragment} instead.</em> 2689 * 2690 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2691 * this method the first time, and hang onto it thereafter. Any dialog 2692 * that is created by this method will automatically be saved and restored 2693 * for you, including whether it is showing. 2694 * 2695 * <p>If you would like the activity to manage saving and restoring dialogs 2696 * for you, you should override this method and handle any ids that are 2697 * passed to {@link #showDialog}. 2698 * 2699 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2700 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2701 * 2702 * @param id The id of the dialog. 2703 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2704 * @return The dialog. If you return null, the dialog will not be created. 2705 * 2706 * @see #onPrepareDialog(int, Dialog, Bundle) 2707 * @see #showDialog(int, Bundle) 2708 * @see #dismissDialog(int) 2709 * @see #removeDialog(int) 2710 */ 2711 protected Dialog onCreateDialog(int id, Bundle args) { 2712 return onCreateDialog(id); 2713 } 2714 2715 /** 2716 * @deprecated Old no-arguments version of 2717 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2718 */ 2719 @Deprecated 2720 protected void onPrepareDialog(int id, Dialog dialog) { 2721 dialog.setOwnerActivity(this); 2722 } 2723 2724 /** 2725 * Provides an opportunity to prepare a managed dialog before it is being 2726 * shown. The default implementation calls through to 2727 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2728 * 2729 * <p> 2730 * Override this if you need to update a managed dialog based on the state 2731 * of the application each time it is shown. For example, a time picker 2732 * dialog might want to be updated with the current time. You should call 2733 * through to the superclass's implementation. The default implementation 2734 * will set this Activity as the owner activity on the Dialog. 2735 * 2736 * @param id The id of the managed dialog. 2737 * @param dialog The dialog. 2738 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2739 * @see #onCreateDialog(int, Bundle) 2740 * @see #showDialog(int) 2741 * @see #dismissDialog(int) 2742 * @see #removeDialog(int) 2743 */ 2744 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 2745 onPrepareDialog(id, dialog); 2746 } 2747 2748 /** 2749 * Simple version of {@link #showDialog(int, Bundle)} that does not 2750 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 2751 * with null arguments. 2752 */ 2753 public final void showDialog(int id) { 2754 showDialog(id, null); 2755 } 2756 2757 /** 2758 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 2759 * will be made with the same id the first time this is called for a given 2760 * id. From thereafter, the dialog will be automatically saved and restored. 2761 * 2762 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2763 * or later, consider instead using a {@link DialogFragment} instead.</em> 2764 * 2765 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 2766 * be made to provide an opportunity to do any timely preparation. 2767 * 2768 * @param id The id of the managed dialog. 2769 * @param args Arguments to pass through to the dialog. These will be saved 2770 * and restored for you. Note that if the dialog is already created, 2771 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 2772 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 2773 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 2774 * @return Returns true if the Dialog was created; false is returned if 2775 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 2776 * 2777 * @see Dialog 2778 * @see #onCreateDialog(int, Bundle) 2779 * @see #onPrepareDialog(int, Dialog, Bundle) 2780 * @see #dismissDialog(int) 2781 * @see #removeDialog(int) 2782 */ 2783 public final boolean showDialog(int id, Bundle args) { 2784 if (mManagedDialogs == null) { 2785 mManagedDialogs = new SparseArray<ManagedDialog>(); 2786 } 2787 ManagedDialog md = mManagedDialogs.get(id); 2788 if (md == null) { 2789 md = new ManagedDialog(); 2790 md.mDialog = createDialog(id, null, args); 2791 if (md.mDialog == null) { 2792 return false; 2793 } 2794 mManagedDialogs.put(id, md); 2795 } 2796 2797 md.mArgs = args; 2798 onPrepareDialog(id, md.mDialog, args); 2799 md.mDialog.show(); 2800 return true; 2801 } 2802 2803 /** 2804 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 2805 * 2806 * @param id The id of the managed dialog. 2807 * 2808 * @throws IllegalArgumentException if the id was not previously shown via 2809 * {@link #showDialog(int)}. 2810 * 2811 * @see #onCreateDialog(int, Bundle) 2812 * @see #onPrepareDialog(int, Dialog, Bundle) 2813 * @see #showDialog(int) 2814 * @see #removeDialog(int) 2815 */ 2816 public final void dismissDialog(int id) { 2817 if (mManagedDialogs == null) { 2818 throw missingDialog(id); 2819 } 2820 2821 final ManagedDialog md = mManagedDialogs.get(id); 2822 if (md == null) { 2823 throw missingDialog(id); 2824 } 2825 md.mDialog.dismiss(); 2826 } 2827 2828 /** 2829 * Creates an exception to throw if a user passed in a dialog id that is 2830 * unexpected. 2831 */ 2832 private IllegalArgumentException missingDialog(int id) { 2833 return new IllegalArgumentException("no dialog with id " + id + " was ever " 2834 + "shown via Activity#showDialog"); 2835 } 2836 2837 /** 2838 * Removes any internal references to a dialog managed by this Activity. 2839 * If the dialog is showing, it will dismiss it as part of the clean up. 2840 * 2841 * <p>This can be useful if you know that you will never show a dialog again and 2842 * want to avoid the overhead of saving and restoring it in the future. 2843 * 2844 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 2845 * will not throw an exception if you try to remove an ID that does not 2846 * currently have an associated dialog.</p> 2847 * 2848 * @param id The id of the managed dialog. 2849 * 2850 * @see #onCreateDialog(int, Bundle) 2851 * @see #onPrepareDialog(int, Dialog, Bundle) 2852 * @see #showDialog(int) 2853 * @see #dismissDialog(int) 2854 */ 2855 public final void removeDialog(int id) { 2856 if (mManagedDialogs != null) { 2857 final ManagedDialog md = mManagedDialogs.get(id); 2858 if (md != null) { 2859 md.mDialog.dismiss(); 2860 mManagedDialogs.remove(id); 2861 } 2862 } 2863 } 2864 2865 /** 2866 * This hook is called when the user signals the desire to start a search. 2867 * 2868 * <p>You can use this function as a simple way to launch the search UI, in response to a 2869 * menu item, search button, or other widgets within your activity. Unless overidden, 2870 * calling this function is the same as calling 2871 * {@link #startSearch startSearch(null, false, null, false)}, which launches 2872 * search for the current activity as specified in its manifest, see {@link SearchManager}. 2873 * 2874 * <p>You can override this function to force global search, e.g. in response to a dedicated 2875 * search key, or to block search entirely (by simply returning false). 2876 * 2877 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 2878 * The default implementation always returns {@code true}. 2879 * 2880 * @see android.app.SearchManager 2881 */ 2882 public boolean onSearchRequested() { 2883 startSearch(null, false, null, false); 2884 return true; 2885 } 2886 2887 /** 2888 * This hook is called to launch the search UI. 2889 * 2890 * <p>It is typically called from onSearchRequested(), either directly from 2891 * Activity.onSearchRequested() or from an overridden version in any given 2892 * Activity. If your goal is simply to activate search, it is preferred to call 2893 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 2894 * is to inject specific data such as context data, it is preferred to <i>override</i> 2895 * onSearchRequested(), so that any callers to it will benefit from the override. 2896 * 2897 * @param initialQuery Any non-null non-empty string will be inserted as 2898 * pre-entered text in the search query box. 2899 * @param selectInitialQuery If true, the intial query will be preselected, which means that 2900 * any further typing will replace it. This is useful for cases where an entire pre-formed 2901 * query is being inserted. If false, the selection point will be placed at the end of the 2902 * inserted query. This is useful when the inserted query is text that the user entered, 2903 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 2904 * if initialQuery is a non-empty string.</i> 2905 * @param appSearchData An application can insert application-specific 2906 * context here, in order to improve quality or specificity of its own 2907 * searches. This data will be returned with SEARCH intent(s). Null if 2908 * no extra data is required. 2909 * @param globalSearch If false, this will only launch the search that has been specifically 2910 * defined by the application (which is usually defined as a local search). If no default 2911 * search is defined in the current application or activity, global search will be launched. 2912 * If true, this will always launch a platform-global (e.g. web-based) search instead. 2913 * 2914 * @see android.app.SearchManager 2915 * @see #onSearchRequested 2916 */ 2917 public void startSearch(String initialQuery, boolean selectInitialQuery, 2918 Bundle appSearchData, boolean globalSearch) { 2919 ensureSearchManager(); 2920 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 2921 appSearchData, globalSearch); 2922 } 2923 2924 /** 2925 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 2926 * the search dialog. Made available for testing purposes. 2927 * 2928 * @param query The query to trigger. If empty, the request will be ignored. 2929 * @param appSearchData An application can insert application-specific 2930 * context here, in order to improve quality or specificity of its own 2931 * searches. This data will be returned with SEARCH intent(s). Null if 2932 * no extra data is required. 2933 */ 2934 public void triggerSearch(String query, Bundle appSearchData) { 2935 ensureSearchManager(); 2936 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 2937 } 2938 2939 /** 2940 * Request that key events come to this activity. Use this if your 2941 * activity has no views with focus, but the activity still wants 2942 * a chance to process key events. 2943 * 2944 * @see android.view.Window#takeKeyEvents 2945 */ 2946 public void takeKeyEvents(boolean get) { 2947 getWindow().takeKeyEvents(get); 2948 } 2949 2950 /** 2951 * Enable extended window features. This is a convenience for calling 2952 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 2953 * 2954 * @param featureId The desired feature as defined in 2955 * {@link android.view.Window}. 2956 * @return Returns true if the requested feature is supported and now 2957 * enabled. 2958 * 2959 * @see android.view.Window#requestFeature 2960 */ 2961 public final boolean requestWindowFeature(int featureId) { 2962 return getWindow().requestFeature(featureId); 2963 } 2964 2965 /** 2966 * Convenience for calling 2967 * {@link android.view.Window#setFeatureDrawableResource}. 2968 */ 2969 public final void setFeatureDrawableResource(int featureId, int resId) { 2970 getWindow().setFeatureDrawableResource(featureId, resId); 2971 } 2972 2973 /** 2974 * Convenience for calling 2975 * {@link android.view.Window#setFeatureDrawableUri}. 2976 */ 2977 public final void setFeatureDrawableUri(int featureId, Uri uri) { 2978 getWindow().setFeatureDrawableUri(featureId, uri); 2979 } 2980 2981 /** 2982 * Convenience for calling 2983 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 2984 */ 2985 public final void setFeatureDrawable(int featureId, Drawable drawable) { 2986 getWindow().setFeatureDrawable(featureId, drawable); 2987 } 2988 2989 /** 2990 * Convenience for calling 2991 * {@link android.view.Window#setFeatureDrawableAlpha}. 2992 */ 2993 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 2994 getWindow().setFeatureDrawableAlpha(featureId, alpha); 2995 } 2996 2997 /** 2998 * Convenience for calling 2999 * {@link android.view.Window#getLayoutInflater}. 3000 */ 3001 public LayoutInflater getLayoutInflater() { 3002 return getWindow().getLayoutInflater(); 3003 } 3004 3005 /** 3006 * Returns a {@link MenuInflater} with this context. 3007 */ 3008 public MenuInflater getMenuInflater() { 3009 return new MenuInflater(this); 3010 } 3011 3012 @Override 3013 protected void onApplyThemeResource(Resources.Theme theme, int resid, 3014 boolean first) { 3015 if (mParent == null) { 3016 super.onApplyThemeResource(theme, resid, first); 3017 } else { 3018 try { 3019 theme.setTo(mParent.getTheme()); 3020 } catch (Exception e) { 3021 // Empty 3022 } 3023 theme.applyStyle(resid, false); 3024 } 3025 } 3026 3027 /** 3028 * Launch an activity for which you would like a result when it finished. 3029 * When this activity exits, your 3030 * onActivityResult() method will be called with the given requestCode. 3031 * Using a negative requestCode is the same as calling 3032 * {@link #startActivity} (the activity is not launched as a sub-activity). 3033 * 3034 * <p>Note that this method should only be used with Intent protocols 3035 * that are defined to return a result. In other protocols (such as 3036 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 3037 * not get the result when you expect. For example, if the activity you 3038 * are launching uses the singleTask launch mode, it will not run in your 3039 * task and thus you will immediately receive a cancel result. 3040 * 3041 * <p>As a special case, if you call startActivityForResult() with a requestCode 3042 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 3043 * activity, then your window will not be displayed until a result is 3044 * returned back from the started activity. This is to avoid visible 3045 * flickering when redirecting to another activity. 3046 * 3047 * <p>This method throws {@link android.content.ActivityNotFoundException} 3048 * if there was no Activity found to run the given Intent. 3049 * 3050 * @param intent The intent to start. 3051 * @param requestCode If >= 0, this code will be returned in 3052 * onActivityResult() when the activity exits. 3053 * 3054 * @throws android.content.ActivityNotFoundException 3055 * 3056 * @see #startActivity 3057 */ 3058 public void startActivityForResult(Intent intent, int requestCode) { 3059 if (mParent == null) { 3060 Instrumentation.ActivityResult ar = 3061 mInstrumentation.execStartActivity( 3062 this, mMainThread.getApplicationThread(), mToken, this, 3063 intent, requestCode); 3064 if (ar != null) { 3065 mMainThread.sendActivityResult( 3066 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 3067 ar.getResultData()); 3068 } 3069 if (requestCode >= 0) { 3070 // If this start is requesting a result, we can avoid making 3071 // the activity visible until the result is received. Setting 3072 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3073 // activity hidden during this time, to avoid flickering. 3074 // This can only be done when a result is requested because 3075 // that guarantees we will get information back when the 3076 // activity is finished, no matter what happens to it. 3077 mStartedActivity = true; 3078 } 3079 } else { 3080 mParent.startActivityFromChild(this, intent, requestCode); 3081 } 3082 } 3083 3084 /** 3085 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 3086 * to use a IntentSender to describe the activity to be started. If 3087 * the IntentSender is for an activity, that activity will be started 3088 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 3089 * here; otherwise, its associated action will be executed (such as 3090 * sending a broadcast) as if you had called 3091 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 3092 * 3093 * @param intent The IntentSender to launch. 3094 * @param requestCode If >= 0, this code will be returned in 3095 * onActivityResult() when the activity exits. 3096 * @param fillInIntent If non-null, this will be provided as the 3097 * intent parameter to {@link IntentSender#sendIntent}. 3098 * @param flagsMask Intent flags in the original IntentSender that you 3099 * would like to change. 3100 * @param flagsValues Desired values for any bits set in 3101 * <var>flagsMask</var> 3102 * @param extraFlags Always set to 0. 3103 */ 3104 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3105 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3106 throws IntentSender.SendIntentException { 3107 if (mParent == null) { 3108 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3109 flagsMask, flagsValues, this); 3110 } else { 3111 mParent.startIntentSenderFromChild(this, intent, requestCode, 3112 fillInIntent, flagsMask, flagsValues, extraFlags); 3113 } 3114 } 3115 3116 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 3117 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity) 3118 throws IntentSender.SendIntentException { 3119 try { 3120 String resolvedType = null; 3121 if (fillInIntent != null) { 3122 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 3123 } 3124 int result = ActivityManagerNative.getDefault() 3125 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 3126 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 3127 requestCode, flagsMask, flagsValues); 3128 if (result == IActivityManager.START_CANCELED) { 3129 throw new IntentSender.SendIntentException(); 3130 } 3131 Instrumentation.checkStartActivityResult(result, null); 3132 } catch (RemoteException e) { 3133 } 3134 if (requestCode >= 0) { 3135 // If this start is requesting a result, we can avoid making 3136 // the activity visible until the result is received. Setting 3137 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3138 // activity hidden during this time, to avoid flickering. 3139 // This can only be done when a result is requested because 3140 // that guarantees we will get information back when the 3141 // activity is finished, no matter what happens to it. 3142 mStartedActivity = true; 3143 } 3144 } 3145 3146 /** 3147 * Launch a new activity. You will not receive any information about when 3148 * the activity exits. This implementation overrides the base version, 3149 * providing information about 3150 * the activity performing the launch. Because of this additional 3151 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3152 * required; if not specified, the new activity will be added to the 3153 * task of the caller. 3154 * 3155 * <p>This method throws {@link android.content.ActivityNotFoundException} 3156 * if there was no Activity found to run the given Intent. 3157 * 3158 * @param intent The intent to start. 3159 * 3160 * @throws android.content.ActivityNotFoundException 3161 * 3162 * @see #startActivityForResult 3163 */ 3164 @Override 3165 public void startActivity(Intent intent) { 3166 startActivityForResult(intent, -1); 3167 } 3168 3169 /** 3170 * Launch a new activity. You will not receive any information about when 3171 * the activity exits. This implementation overrides the base version, 3172 * providing information about 3173 * the activity performing the launch. Because of this additional 3174 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3175 * required; if not specified, the new activity will be added to the 3176 * task of the caller. 3177 * 3178 * <p>This method throws {@link android.content.ActivityNotFoundException} 3179 * if there was no Activity found to run the given Intent. 3180 * 3181 * @param intents The intents to start. 3182 * 3183 * @throws android.content.ActivityNotFoundException 3184 * 3185 * @see #startActivityForResult 3186 */ 3187 @Override 3188 public void startActivities(Intent[] intents) { 3189 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 3190 mToken, this, intents); 3191 } 3192 3193 /** 3194 * Like {@link #startActivity(Intent)}, but taking a IntentSender 3195 * to start; see 3196 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3197 * for more information. 3198 * 3199 * @param intent The IntentSender to launch. 3200 * @param fillInIntent If non-null, this will be provided as the 3201 * intent parameter to {@link IntentSender#sendIntent}. 3202 * @param flagsMask Intent flags in the original IntentSender that you 3203 * would like to change. 3204 * @param flagsValues Desired values for any bits set in 3205 * <var>flagsMask</var> 3206 * @param extraFlags Always set to 0. 3207 */ 3208 public void startIntentSender(IntentSender intent, 3209 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3210 throws IntentSender.SendIntentException { 3211 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3212 flagsValues, extraFlags); 3213 } 3214 3215 /** 3216 * A special variation to launch an activity only if a new activity 3217 * instance is needed to handle the given Intent. In other words, this is 3218 * just like {@link #startActivityForResult(Intent, int)} except: if you are 3219 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 3220 * singleTask or singleTop 3221 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 3222 * and the activity 3223 * that handles <var>intent</var> is the same as your currently running 3224 * activity, then a new instance is not needed. In this case, instead of 3225 * the normal behavior of calling {@link #onNewIntent} this function will 3226 * return and you can handle the Intent yourself. 3227 * 3228 * <p>This function can only be called from a top-level activity; if it is 3229 * called from a child activity, a runtime exception will be thrown. 3230 * 3231 * @param intent The intent to start. 3232 * @param requestCode If >= 0, this code will be returned in 3233 * onActivityResult() when the activity exits, as described in 3234 * {@link #startActivityForResult}. 3235 * 3236 * @return If a new activity was launched then true is returned; otherwise 3237 * false is returned and you must handle the Intent yourself. 3238 * 3239 * @see #startActivity 3240 * @see #startActivityForResult 3241 */ 3242 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 3243 if (mParent == null) { 3244 int result = IActivityManager.START_RETURN_INTENT_TO_CALLER; 3245 try { 3246 result = ActivityManagerNative.getDefault() 3247 .startActivity(mMainThread.getApplicationThread(), 3248 intent, intent.resolveTypeIfNeeded( 3249 getContentResolver()), 3250 null, 0, 3251 mToken, mEmbeddedID, requestCode, true, false); 3252 } catch (RemoteException e) { 3253 // Empty 3254 } 3255 3256 Instrumentation.checkStartActivityResult(result, intent); 3257 3258 if (requestCode >= 0) { 3259 // If this start is requesting a result, we can avoid making 3260 // the activity visible until the result is received. Setting 3261 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3262 // activity hidden during this time, to avoid flickering. 3263 // This can only be done when a result is requested because 3264 // that guarantees we will get information back when the 3265 // activity is finished, no matter what happens to it. 3266 mStartedActivity = true; 3267 } 3268 return result != IActivityManager.START_RETURN_INTENT_TO_CALLER; 3269 } 3270 3271 throw new UnsupportedOperationException( 3272 "startActivityIfNeeded can only be called from a top-level activity"); 3273 } 3274 3275 /** 3276 * Special version of starting an activity, for use when you are replacing 3277 * other activity components. You can use this to hand the Intent off 3278 * to the next Activity that can handle it. You typically call this in 3279 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3280 * 3281 * @param intent The intent to dispatch to the next activity. For 3282 * correct behavior, this must be the same as the Intent that started 3283 * your own activity; the only changes you can make are to the extras 3284 * inside of it. 3285 * 3286 * @return Returns a boolean indicating whether there was another Activity 3287 * to start: true if there was a next activity to start, false if there 3288 * wasn't. In general, if true is returned you will then want to call 3289 * finish() on yourself. 3290 */ 3291 public boolean startNextMatchingActivity(Intent intent) { 3292 if (mParent == null) { 3293 try { 3294 return ActivityManagerNative.getDefault() 3295 .startNextMatchingActivity(mToken, intent); 3296 } catch (RemoteException e) { 3297 // Empty 3298 } 3299 return false; 3300 } 3301 3302 throw new UnsupportedOperationException( 3303 "startNextMatchingActivity can only be called from a top-level activity"); 3304 } 3305 3306 /** 3307 * This is called when a child activity of this one calls its 3308 * {@link #startActivity} or {@link #startActivityForResult} method. 3309 * 3310 * <p>This method throws {@link android.content.ActivityNotFoundException} 3311 * if there was no Activity found to run the given Intent. 3312 * 3313 * @param child The activity making the call. 3314 * @param intent The intent to start. 3315 * @param requestCode Reply request code. < 0 if reply is not requested. 3316 * 3317 * @throws android.content.ActivityNotFoundException 3318 * 3319 * @see #startActivity 3320 * @see #startActivityForResult 3321 */ 3322 public void startActivityFromChild(Activity child, Intent intent, 3323 int requestCode) { 3324 Instrumentation.ActivityResult ar = 3325 mInstrumentation.execStartActivity( 3326 this, mMainThread.getApplicationThread(), mToken, child, 3327 intent, requestCode); 3328 if (ar != null) { 3329 mMainThread.sendActivityResult( 3330 mToken, child.mEmbeddedID, requestCode, 3331 ar.getResultCode(), ar.getResultData()); 3332 } 3333 } 3334 3335 /** 3336 * This is called when a Fragment in this activity calls its 3337 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 3338 * method. 3339 * 3340 * <p>This method throws {@link android.content.ActivityNotFoundException} 3341 * if there was no Activity found to run the given Intent. 3342 * 3343 * @param fragment The fragment making the call. 3344 * @param intent The intent to start. 3345 * @param requestCode Reply request code. < 0 if reply is not requested. 3346 * 3347 * @throws android.content.ActivityNotFoundException 3348 * 3349 * @see Fragment#startActivity 3350 * @see Fragment#startActivityForResult 3351 */ 3352 public void startActivityFromFragment(Fragment fragment, Intent intent, 3353 int requestCode) { 3354 Instrumentation.ActivityResult ar = 3355 mInstrumentation.execStartActivity( 3356 this, mMainThread.getApplicationThread(), mToken, fragment, 3357 intent, requestCode); 3358 if (ar != null) { 3359 mMainThread.sendActivityResult( 3360 mToken, fragment.mWho, requestCode, 3361 ar.getResultCode(), ar.getResultData()); 3362 } 3363 } 3364 3365 /** 3366 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3367 * taking a IntentSender; see 3368 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3369 * for more information. 3370 */ 3371 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3372 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3373 int extraFlags) 3374 throws IntentSender.SendIntentException { 3375 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3376 flagsMask, flagsValues, child); 3377 } 3378 3379 /** 3380 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3381 * or {@link #finish} to specify an explicit transition animation to 3382 * perform next. 3383 * @param enterAnim A resource ID of the animation resource to use for 3384 * the incoming activity. Use 0 for no animation. 3385 * @param exitAnim A resource ID of the animation resource to use for 3386 * the outgoing activity. Use 0 for no animation. 3387 */ 3388 public void overridePendingTransition(int enterAnim, int exitAnim) { 3389 try { 3390 ActivityManagerNative.getDefault().overridePendingTransition( 3391 mToken, getPackageName(), enterAnim, exitAnim); 3392 } catch (RemoteException e) { 3393 } 3394 } 3395 3396 /** 3397 * Call this to set the result that your activity will return to its 3398 * caller. 3399 * 3400 * @param resultCode The result code to propagate back to the originating 3401 * activity, often RESULT_CANCELED or RESULT_OK 3402 * 3403 * @see #RESULT_CANCELED 3404 * @see #RESULT_OK 3405 * @see #RESULT_FIRST_USER 3406 * @see #setResult(int, Intent) 3407 */ 3408 public final void setResult(int resultCode) { 3409 synchronized (this) { 3410 mResultCode = resultCode; 3411 mResultData = null; 3412 } 3413 } 3414 3415 /** 3416 * Call this to set the result that your activity will return to its 3417 * caller. 3418 * 3419 * @param resultCode The result code to propagate back to the originating 3420 * activity, often RESULT_CANCELED or RESULT_OK 3421 * @param data The data to propagate back to the originating activity. 3422 * 3423 * @see #RESULT_CANCELED 3424 * @see #RESULT_OK 3425 * @see #RESULT_FIRST_USER 3426 * @see #setResult(int) 3427 */ 3428 public final void setResult(int resultCode, Intent data) { 3429 synchronized (this) { 3430 mResultCode = resultCode; 3431 mResultData = data; 3432 } 3433 } 3434 3435 /** 3436 * Return the name of the package that invoked this activity. This is who 3437 * the data in {@link #setResult setResult()} will be sent to. You can 3438 * use this information to validate that the recipient is allowed to 3439 * receive the data. 3440 * 3441 * <p>Note: if the calling activity is not expecting a result (that is it 3442 * did not use the {@link #startActivityForResult} 3443 * form that includes a request code), then the calling package will be 3444 * null. 3445 * 3446 * @return The package of the activity that will receive your 3447 * reply, or null if none. 3448 */ 3449 public String getCallingPackage() { 3450 try { 3451 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 3452 } catch (RemoteException e) { 3453 return null; 3454 } 3455 } 3456 3457 /** 3458 * Return the name of the activity that invoked this activity. This is 3459 * who the data in {@link #setResult setResult()} will be sent to. You 3460 * can use this information to validate that the recipient is allowed to 3461 * receive the data. 3462 * 3463 * <p>Note: if the calling activity is not expecting a result (that is it 3464 * did not use the {@link #startActivityForResult} 3465 * form that includes a request code), then the calling package will be 3466 * null. 3467 * 3468 * @return String The full name of the activity that will receive your 3469 * reply, or null if none. 3470 */ 3471 public ComponentName getCallingActivity() { 3472 try { 3473 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 3474 } catch (RemoteException e) { 3475 return null; 3476 } 3477 } 3478 3479 /** 3480 * Control whether this activity's main window is visible. This is intended 3481 * only for the special case of an activity that is not going to show a 3482 * UI itself, but can't just finish prior to onResume() because it needs 3483 * to wait for a service binding or such. Setting this to false allows 3484 * you to prevent your UI from being shown during that time. 3485 * 3486 * <p>The default value for this is taken from the 3487 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 3488 */ 3489 public void setVisible(boolean visible) { 3490 if (mVisibleFromClient != visible) { 3491 mVisibleFromClient = visible; 3492 if (mVisibleFromServer) { 3493 if (visible) makeVisible(); 3494 else mDecor.setVisibility(View.INVISIBLE); 3495 } 3496 } 3497 } 3498 3499 void makeVisible() { 3500 if (!mWindowAdded) { 3501 ViewManager wm = getWindowManager(); 3502 wm.addView(mDecor, getWindow().getAttributes()); 3503 mWindowAdded = true; 3504 } 3505 mDecor.setVisibility(View.VISIBLE); 3506 } 3507 3508 /** 3509 * Check to see whether this activity is in the process of finishing, 3510 * either because you called {@link #finish} on it or someone else 3511 * has requested that it finished. This is often used in 3512 * {@link #onPause} to determine whether the activity is simply pausing or 3513 * completely finishing. 3514 * 3515 * @return If the activity is finishing, returns true; else returns false. 3516 * 3517 * @see #finish 3518 */ 3519 public boolean isFinishing() { 3520 return mFinished; 3521 } 3522 3523 /** 3524 * Check to see whether this activity is in the process of being destroyed in order to be 3525 * recreated with a new configuration. This is often used in 3526 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 3527 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 3528 * 3529 * @return If the activity is being torn down in order to be recreated with a new configuration, 3530 * returns true; else returns false. 3531 */ 3532 public boolean isChangingConfigurations() { 3533 return mChangingConfigurations; 3534 } 3535 3536 /** 3537 * Cause this Activity to be recreated with a new instance. This results 3538 * in essentially the same flow as when the Activity is created due to 3539 * a configuration change -- the current instance will go through its 3540 * lifecycle to {@link #onDestroy} and a new instance then created after it. 3541 */ 3542 public void recreate() { 3543 if (mParent != null) { 3544 throw new IllegalStateException("Can only be called on top-level activity"); 3545 } 3546 if (Looper.myLooper() != mMainThread.getLooper()) { 3547 throw new IllegalStateException("Must be called from main thread"); 3548 } 3549 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, false); 3550 } 3551 3552 /** 3553 * Call this when your activity is done and should be closed. The 3554 * ActivityResult is propagated back to whoever launched you via 3555 * onActivityResult(). 3556 */ 3557 public void finish() { 3558 if (mParent == null) { 3559 int resultCode; 3560 Intent resultData; 3561 synchronized (this) { 3562 resultCode = mResultCode; 3563 resultData = mResultData; 3564 } 3565 if (Config.LOGV) Log.v(TAG, "Finishing self: token=" + mToken); 3566 try { 3567 if (ActivityManagerNative.getDefault() 3568 .finishActivity(mToken, resultCode, resultData)) { 3569 mFinished = true; 3570 } 3571 } catch (RemoteException e) { 3572 // Empty 3573 } 3574 } else { 3575 mParent.finishFromChild(this); 3576 } 3577 } 3578 3579 /** 3580 * This is called when a child activity of this one calls its 3581 * {@link #finish} method. The default implementation simply calls 3582 * finish() on this activity (the parent), finishing the entire group. 3583 * 3584 * @param child The activity making the call. 3585 * 3586 * @see #finish 3587 */ 3588 public void finishFromChild(Activity child) { 3589 finish(); 3590 } 3591 3592 /** 3593 * Force finish another activity that you had previously started with 3594 * {@link #startActivityForResult}. 3595 * 3596 * @param requestCode The request code of the activity that you had 3597 * given to startActivityForResult(). If there are multiple 3598 * activities started with this request code, they 3599 * will all be finished. 3600 */ 3601 public void finishActivity(int requestCode) { 3602 if (mParent == null) { 3603 try { 3604 ActivityManagerNative.getDefault() 3605 .finishSubActivity(mToken, mEmbeddedID, requestCode); 3606 } catch (RemoteException e) { 3607 // Empty 3608 } 3609 } else { 3610 mParent.finishActivityFromChild(this, requestCode); 3611 } 3612 } 3613 3614 /** 3615 * This is called when a child activity of this one calls its 3616 * finishActivity(). 3617 * 3618 * @param child The activity making the call. 3619 * @param requestCode Request code that had been used to start the 3620 * activity. 3621 */ 3622 public void finishActivityFromChild(Activity child, int requestCode) { 3623 try { 3624 ActivityManagerNative.getDefault() 3625 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 3626 } catch (RemoteException e) { 3627 // Empty 3628 } 3629 } 3630 3631 /** 3632 * Called when an activity you launched exits, giving you the requestCode 3633 * you started it with, the resultCode it returned, and any additional 3634 * data from it. The <var>resultCode</var> will be 3635 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 3636 * didn't return any result, or crashed during its operation. 3637 * 3638 * <p>You will receive this call immediately before onResume() when your 3639 * activity is re-starting. 3640 * 3641 * @param requestCode The integer request code originally supplied to 3642 * startActivityForResult(), allowing you to identify who this 3643 * result came from. 3644 * @param resultCode The integer result code returned by the child activity 3645 * through its setResult(). 3646 * @param data An Intent, which can return result data to the caller 3647 * (various data can be attached to Intent "extras"). 3648 * 3649 * @see #startActivityForResult 3650 * @see #createPendingResult 3651 * @see #setResult(int) 3652 */ 3653 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 3654 } 3655 3656 /** 3657 * Create a new PendingIntent object which you can hand to others 3658 * for them to use to send result data back to your 3659 * {@link #onActivityResult} callback. The created object will be either 3660 * one-shot (becoming invalid after a result is sent back) or multiple 3661 * (allowing any number of results to be sent through it). 3662 * 3663 * @param requestCode Private request code for the sender that will be 3664 * associated with the result data when it is returned. The sender can not 3665 * modify this value, allowing you to identify incoming results. 3666 * @param data Default data to supply in the result, which may be modified 3667 * by the sender. 3668 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 3669 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 3670 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 3671 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 3672 * or any of the flags as supported by 3673 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 3674 * of the intent that can be supplied when the actual send happens. 3675 * 3676 * @return Returns an existing or new PendingIntent matching the given 3677 * parameters. May return null only if 3678 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 3679 * supplied. 3680 * 3681 * @see PendingIntent 3682 */ 3683 public PendingIntent createPendingResult(int requestCode, Intent data, 3684 int flags) { 3685 String packageName = getPackageName(); 3686 try { 3687 IIntentSender target = 3688 ActivityManagerNative.getDefault().getIntentSender( 3689 IActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 3690 mParent == null ? mToken : mParent.mToken, 3691 mEmbeddedID, requestCode, new Intent[] { data }, null, flags); 3692 return target != null ? new PendingIntent(target) : null; 3693 } catch (RemoteException e) { 3694 // Empty 3695 } 3696 return null; 3697 } 3698 3699 /** 3700 * Change the desired orientation of this activity. If the activity 3701 * is currently in the foreground or otherwise impacting the screen 3702 * orientation, the screen will immediately be changed (possibly causing 3703 * the activity to be restarted). Otherwise, this will be used the next 3704 * time the activity is visible. 3705 * 3706 * @param requestedOrientation An orientation constant as used in 3707 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3708 */ 3709 public void setRequestedOrientation(int requestedOrientation) { 3710 if (mParent == null) { 3711 try { 3712 ActivityManagerNative.getDefault().setRequestedOrientation( 3713 mToken, requestedOrientation); 3714 } catch (RemoteException e) { 3715 // Empty 3716 } 3717 } else { 3718 mParent.setRequestedOrientation(requestedOrientation); 3719 } 3720 } 3721 3722 /** 3723 * Return the current requested orientation of the activity. This will 3724 * either be the orientation requested in its component's manifest, or 3725 * the last requested orientation given to 3726 * {@link #setRequestedOrientation(int)}. 3727 * 3728 * @return Returns an orientation constant as used in 3729 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3730 */ 3731 public int getRequestedOrientation() { 3732 if (mParent == null) { 3733 try { 3734 return ActivityManagerNative.getDefault() 3735 .getRequestedOrientation(mToken); 3736 } catch (RemoteException e) { 3737 // Empty 3738 } 3739 } else { 3740 return mParent.getRequestedOrientation(); 3741 } 3742 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 3743 } 3744 3745 /** 3746 * Return the identifier of the task this activity is in. This identifier 3747 * will remain the same for the lifetime of the activity. 3748 * 3749 * @return Task identifier, an opaque integer. 3750 */ 3751 public int getTaskId() { 3752 try { 3753 return ActivityManagerNative.getDefault() 3754 .getTaskForActivity(mToken, false); 3755 } catch (RemoteException e) { 3756 return -1; 3757 } 3758 } 3759 3760 /** 3761 * Return whether this activity is the root of a task. The root is the 3762 * first activity in a task. 3763 * 3764 * @return True if this is the root activity, else false. 3765 */ 3766 public boolean isTaskRoot() { 3767 try { 3768 return ActivityManagerNative.getDefault() 3769 .getTaskForActivity(mToken, true) >= 0; 3770 } catch (RemoteException e) { 3771 return false; 3772 } 3773 } 3774 3775 /** 3776 * Move the task containing this activity to the back of the activity 3777 * stack. The activity's order within the task is unchanged. 3778 * 3779 * @param nonRoot If false then this only works if the activity is the root 3780 * of a task; if true it will work for any activity in 3781 * a task. 3782 * 3783 * @return If the task was moved (or it was already at the 3784 * back) true is returned, else false. 3785 */ 3786 public boolean moveTaskToBack(boolean nonRoot) { 3787 try { 3788 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 3789 mToken, nonRoot); 3790 } catch (RemoteException e) { 3791 // Empty 3792 } 3793 return false; 3794 } 3795 3796 /** 3797 * Returns class name for this activity with the package prefix removed. 3798 * This is the default name used to read and write settings. 3799 * 3800 * @return The local class name. 3801 */ 3802 public String getLocalClassName() { 3803 final String pkg = getPackageName(); 3804 final String cls = mComponent.getClassName(); 3805 int packageLen = pkg.length(); 3806 if (!cls.startsWith(pkg) || cls.length() <= packageLen 3807 || cls.charAt(packageLen) != '.') { 3808 return cls; 3809 } 3810 return cls.substring(packageLen+1); 3811 } 3812 3813 /** 3814 * Returns complete component name of this activity. 3815 * 3816 * @return Returns the complete component name for this activity 3817 */ 3818 public ComponentName getComponentName() 3819 { 3820 return mComponent; 3821 } 3822 3823 /** 3824 * Retrieve a {@link SharedPreferences} object for accessing preferences 3825 * that are private to this activity. This simply calls the underlying 3826 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 3827 * class name as the preferences name. 3828 * 3829 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 3830 * operation, {@link #MODE_WORLD_READABLE} and 3831 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 3832 * 3833 * @return Returns the single SharedPreferences instance that can be used 3834 * to retrieve and modify the preference values. 3835 */ 3836 public SharedPreferences getPreferences(int mode) { 3837 return getSharedPreferences(getLocalClassName(), mode); 3838 } 3839 3840 private void ensureSearchManager() { 3841 if (mSearchManager != null) { 3842 return; 3843 } 3844 3845 mSearchManager = new SearchManager(this, null); 3846 } 3847 3848 @Override 3849 public Object getSystemService(String name) { 3850 if (getBaseContext() == null) { 3851 throw new IllegalStateException( 3852 "System services not available to Activities before onCreate()"); 3853 } 3854 3855 if (WINDOW_SERVICE.equals(name)) { 3856 return mWindowManager; 3857 } else if (SEARCH_SERVICE.equals(name)) { 3858 ensureSearchManager(); 3859 return mSearchManager; 3860 } 3861 return super.getSystemService(name); 3862 } 3863 3864 /** 3865 * Change the title associated with this activity. If this is a 3866 * top-level activity, the title for its window will change. If it 3867 * is an embedded activity, the parent can do whatever it wants 3868 * with it. 3869 */ 3870 public void setTitle(CharSequence title) { 3871 mTitle = title; 3872 onTitleChanged(title, mTitleColor); 3873 3874 if (mParent != null) { 3875 mParent.onChildTitleChanged(this, title); 3876 } 3877 } 3878 3879 /** 3880 * Change the title associated with this activity. If this is a 3881 * top-level activity, the title for its window will change. If it 3882 * is an embedded activity, the parent can do whatever it wants 3883 * with it. 3884 */ 3885 public void setTitle(int titleId) { 3886 setTitle(getText(titleId)); 3887 } 3888 3889 public void setTitleColor(int textColor) { 3890 mTitleColor = textColor; 3891 onTitleChanged(mTitle, textColor); 3892 } 3893 3894 public final CharSequence getTitle() { 3895 return mTitle; 3896 } 3897 3898 public final int getTitleColor() { 3899 return mTitleColor; 3900 } 3901 3902 protected void onTitleChanged(CharSequence title, int color) { 3903 if (mTitleReady) { 3904 final Window win = getWindow(); 3905 if (win != null) { 3906 win.setTitle(title); 3907 if (color != 0) { 3908 win.setTitleColor(color); 3909 } 3910 } 3911 } 3912 } 3913 3914 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 3915 } 3916 3917 /** 3918 * Sets the visibility of the progress bar in the title. 3919 * <p> 3920 * In order for the progress bar to be shown, the feature must be requested 3921 * via {@link #requestWindowFeature(int)}. 3922 * 3923 * @param visible Whether to show the progress bars in the title. 3924 */ 3925 public final void setProgressBarVisibility(boolean visible) { 3926 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 3927 Window.PROGRESS_VISIBILITY_OFF); 3928 } 3929 3930 /** 3931 * Sets the visibility of the indeterminate progress bar in the title. 3932 * <p> 3933 * In order for the progress bar to be shown, the feature must be requested 3934 * via {@link #requestWindowFeature(int)}. 3935 * 3936 * @param visible Whether to show the progress bars in the title. 3937 */ 3938 public final void setProgressBarIndeterminateVisibility(boolean visible) { 3939 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 3940 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 3941 } 3942 3943 /** 3944 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 3945 * is always indeterminate). 3946 * <p> 3947 * In order for the progress bar to be shown, the feature must be requested 3948 * via {@link #requestWindowFeature(int)}. 3949 * 3950 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 3951 */ 3952 public final void setProgressBarIndeterminate(boolean indeterminate) { 3953 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3954 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 3955 } 3956 3957 /** 3958 * Sets the progress for the progress bars in the title. 3959 * <p> 3960 * In order for the progress bar to be shown, the feature must be requested 3961 * via {@link #requestWindowFeature(int)}. 3962 * 3963 * @param progress The progress for the progress bar. Valid ranges are from 3964 * 0 to 10000 (both inclusive). If 10000 is given, the progress 3965 * bar will be completely filled and will fade out. 3966 */ 3967 public final void setProgress(int progress) { 3968 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 3969 } 3970 3971 /** 3972 * Sets the secondary progress for the progress bar in the title. This 3973 * progress is drawn between the primary progress (set via 3974 * {@link #setProgress(int)} and the background. It can be ideal for media 3975 * scenarios such as showing the buffering progress while the default 3976 * progress shows the play progress. 3977 * <p> 3978 * In order for the progress bar to be shown, the feature must be requested 3979 * via {@link #requestWindowFeature(int)}. 3980 * 3981 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 3982 * 0 to 10000 (both inclusive). 3983 */ 3984 public final void setSecondaryProgress(int secondaryProgress) { 3985 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3986 secondaryProgress + Window.PROGRESS_SECONDARY_START); 3987 } 3988 3989 /** 3990 * Suggests an audio stream whose volume should be changed by the hardware 3991 * volume controls. 3992 * <p> 3993 * The suggested audio stream will be tied to the window of this Activity. 3994 * If the Activity is switched, the stream set here is no longer the 3995 * suggested stream. The client does not need to save and restore the old 3996 * suggested stream value in onPause and onResume. 3997 * 3998 * @param streamType The type of the audio stream whose volume should be 3999 * changed by the hardware volume controls. It is not guaranteed that 4000 * the hardware volume controls will always change this stream's 4001 * volume (for example, if a call is in progress, its stream's volume 4002 * may be changed instead). To reset back to the default, use 4003 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 4004 */ 4005 public final void setVolumeControlStream(int streamType) { 4006 getWindow().setVolumeControlStream(streamType); 4007 } 4008 4009 /** 4010 * Gets the suggested audio stream whose volume should be changed by the 4011 * harwdare volume controls. 4012 * 4013 * @return The suggested audio stream type whose volume should be changed by 4014 * the hardware volume controls. 4015 * @see #setVolumeControlStream(int) 4016 */ 4017 public final int getVolumeControlStream() { 4018 return getWindow().getVolumeControlStream(); 4019 } 4020 4021 /** 4022 * Runs the specified action on the UI thread. If the current thread is the UI 4023 * thread, then the action is executed immediately. If the current thread is 4024 * not the UI thread, the action is posted to the event queue of the UI thread. 4025 * 4026 * @param action the action to run on the UI thread 4027 */ 4028 public final void runOnUiThread(Runnable action) { 4029 if (Thread.currentThread() != mUiThread) { 4030 mHandler.post(action); 4031 } else { 4032 action.run(); 4033 } 4034 } 4035 4036 /** 4037 * Standard implementation of 4038 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 4039 * inflating with the LayoutInflater returned by {@link #getSystemService}. 4040 * This implementation does nothing and is for 4041 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 4042 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 4043 * 4044 * @see android.view.LayoutInflater#createView 4045 * @see android.view.Window#getLayoutInflater 4046 */ 4047 public View onCreateView(String name, Context context, AttributeSet attrs) { 4048 return null; 4049 } 4050 4051 /** 4052 * Standard implementation of 4053 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 4054 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 4055 * This implementation handles <fragment> tags to embed fragments inside 4056 * of the activity. 4057 * 4058 * @see android.view.LayoutInflater#createView 4059 * @see android.view.Window#getLayoutInflater 4060 */ 4061 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 4062 if (!"fragment".equals(name)) { 4063 return onCreateView(name, context, attrs); 4064 } 4065 4066 String fname = attrs.getAttributeValue(null, "class"); 4067 TypedArray a = 4068 context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Fragment); 4069 if (fname == null) { 4070 fname = a.getString(com.android.internal.R.styleable.Fragment_name); 4071 } 4072 int id = a.getResourceId(com.android.internal.R.styleable.Fragment_id, View.NO_ID); 4073 String tag = a.getString(com.android.internal.R.styleable.Fragment_tag); 4074 a.recycle(); 4075 4076 int containerId = parent != null ? parent.getId() : 0; 4077 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 4078 throw new IllegalArgumentException(attrs.getPositionDescription() 4079 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 4080 } 4081 4082 // If we restored from a previous state, we may already have 4083 // instantiated this fragment from the state and should use 4084 // that instance instead of making a new one. 4085 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 4086 if (fragment == null && tag != null) { 4087 fragment = mFragments.findFragmentByTag(tag); 4088 } 4089 if (fragment == null && containerId != View.NO_ID) { 4090 fragment = mFragments.findFragmentById(containerId); 4091 } 4092 4093 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 4094 + Integer.toHexString(id) + " fname=" + fname 4095 + " existing=" + fragment); 4096 if (fragment == null) { 4097 fragment = Fragment.instantiate(this, fname); 4098 fragment.mFromLayout = true; 4099 fragment.mFragmentId = id != 0 ? id : containerId; 4100 fragment.mContainerId = containerId; 4101 fragment.mTag = tag; 4102 fragment.mInLayout = true; 4103 fragment.mImmediateActivity = this; 4104 fragment.mFragmentManager = mFragments; 4105 fragment.onInflate(attrs, fragment.mSavedFragmentState); 4106 mFragments.addFragment(fragment, true); 4107 4108 } else if (fragment.mInLayout) { 4109 // A fragment already exists and it is not one we restored from 4110 // previous state. 4111 throw new IllegalArgumentException(attrs.getPositionDescription() 4112 + ": Duplicate id 0x" + Integer.toHexString(id) 4113 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 4114 + " with another fragment for " + fname); 4115 } else { 4116 // This fragment was retained from a previous instance; get it 4117 // going now. 4118 fragment.mInLayout = true; 4119 fragment.mImmediateActivity = this; 4120 // If this fragment is newly instantiated (either right now, or 4121 // from last saved state), then give it the attributes to 4122 // initialize itself. 4123 if (!fragment.mRetaining) { 4124 fragment.onInflate(attrs, fragment.mSavedFragmentState); 4125 } 4126 mFragments.moveToState(fragment); 4127 } 4128 4129 if (fragment.mView == null) { 4130 throw new IllegalStateException("Fragment " + fname 4131 + " did not create a view."); 4132 } 4133 if (id != 0) { 4134 fragment.mView.setId(id); 4135 } 4136 if (fragment.mView.getTag() == null) { 4137 fragment.mView.setTag(tag); 4138 } 4139 return fragment.mView; 4140 } 4141 4142 /** 4143 * Print the Activity's state into the given stream. This gets invoked if 4144 * you run "adb shell dumpsys activity <activity_component_name>". 4145 * 4146 * @param prefix Desired prefix to prepend at each line of output. 4147 * @param fd The raw file descriptor that the dump is being sent to. 4148 * @param writer The PrintWriter to which you should dump your state. This will be 4149 * closed for you after you return. 4150 * @param args additional arguments to the dump request. 4151 */ 4152 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4153 writer.print(prefix); writer.print("Local Activity "); 4154 writer.print(Integer.toHexString(System.identityHashCode(this))); 4155 writer.println(" State:"); 4156 String innerPrefix = prefix + " "; 4157 writer.print(innerPrefix); writer.print("mResumed="); 4158 writer.print(mResumed); writer.print(" mStopped="); 4159 writer.print(mStopped); writer.print(" mFinished="); 4160 writer.println(mFinished); 4161 writer.print(innerPrefix); writer.print("mLoadersStarted="); 4162 writer.println(mLoadersStarted); 4163 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 4164 writer.println(mChangingConfigurations); 4165 writer.print(innerPrefix); writer.print("mCurrentConfig="); 4166 writer.println(mCurrentConfig); 4167 if (mLoaderManager != null) { 4168 writer.print(prefix); writer.print("Loader Manager "); 4169 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 4170 writer.println(":"); 4171 mLoaderManager.dump(prefix + " ", fd, writer, args); 4172 } 4173 mFragments.dump(prefix, fd, writer, args); 4174 } 4175 4176 /** 4177 * Bit indicating that this activity is "immersive" and should not be 4178 * interrupted by notifications if possible. 4179 * 4180 * This value is initially set by the manifest property 4181 * <code>android:immersive</code> but may be changed at runtime by 4182 * {@link #setImmersive}. 4183 * 4184 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4185 * @hide 4186 */ 4187 public boolean isImmersive() { 4188 try { 4189 return ActivityManagerNative.getDefault().isImmersive(mToken); 4190 } catch (RemoteException e) { 4191 return false; 4192 } 4193 } 4194 4195 /** 4196 * Adjust the current immersive mode setting. 4197 * 4198 * Note that changing this value will have no effect on the activity's 4199 * {@link android.content.pm.ActivityInfo} structure; that is, if 4200 * <code>android:immersive</code> is set to <code>true</code> 4201 * in the application's manifest entry for this activity, the {@link 4202 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 4203 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4204 * FLAG_IMMERSIVE} bit set. 4205 * 4206 * @see #isImmersive 4207 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4208 * @hide 4209 */ 4210 public void setImmersive(boolean i) { 4211 try { 4212 ActivityManagerNative.getDefault().setImmersive(mToken, i); 4213 } catch (RemoteException e) { 4214 // pass 4215 } 4216 } 4217 4218 /** 4219 * Start an action mode. 4220 * 4221 * @param callback Callback that will manage lifecycle events for this context mode 4222 * @return The ContextMode that was started, or null if it was canceled 4223 * 4224 * @see ActionMode 4225 */ 4226 public ActionMode startActionMode(ActionMode.Callback callback) { 4227 return mWindow.getDecorView().startActionMode(callback); 4228 } 4229 4230 /** 4231 * Give the Activity a chance to control the UI for an action mode requested 4232 * by the system. 4233 * 4234 * <p>Note: If you are looking for a notification callback that an action mode 4235 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 4236 * 4237 * @param callback The callback that should control the new action mode 4238 * @return The new action mode, or <code>null</code> if the activity does not want to 4239 * provide special handling for this action mode. (It will be handled by the system.) 4240 */ 4241 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 4242 initActionBar(); 4243 if (mActionBar != null) { 4244 return mActionBar.startActionMode(callback); 4245 } 4246 return null; 4247 } 4248 4249 /** 4250 * Notifies the Activity that an action mode has been started. 4251 * Activity subclasses overriding this method should call the superclass implementation. 4252 * 4253 * @param mode The new action mode. 4254 */ 4255 public void onActionModeStarted(ActionMode mode) { 4256 } 4257 4258 /** 4259 * Notifies the activity that an action mode has finished. 4260 * Activity subclasses overriding this method should call the superclass implementation. 4261 * 4262 * @param mode The action mode that just finished. 4263 */ 4264 public void onActionModeFinished(ActionMode mode) { 4265 } 4266 4267 // ------------------ Internal API ------------------ 4268 4269 final void setParent(Activity parent) { 4270 mParent = parent; 4271 } 4272 4273 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 4274 Application application, Intent intent, ActivityInfo info, CharSequence title, 4275 Activity parent, String id, NonConfigurationInstances lastNonConfigurationInstances, 4276 Configuration config) { 4277 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 4278 lastNonConfigurationInstances, config); 4279 } 4280 4281 final void attach(Context context, ActivityThread aThread, 4282 Instrumentation instr, IBinder token, int ident, 4283 Application application, Intent intent, ActivityInfo info, 4284 CharSequence title, Activity parent, String id, 4285 NonConfigurationInstances lastNonConfigurationInstances, 4286 Configuration config) { 4287 attachBaseContext(context); 4288 4289 mFragments.attachActivity(this); 4290 4291 mWindow = PolicyManager.makeNewWindow(this); 4292 mWindow.setCallback(this); 4293 mWindow.getLayoutInflater().setFactory2(this); 4294 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 4295 mWindow.setSoftInputMode(info.softInputMode); 4296 } 4297 mUiThread = Thread.currentThread(); 4298 4299 mMainThread = aThread; 4300 mInstrumentation = instr; 4301 mToken = token; 4302 mIdent = ident; 4303 mApplication = application; 4304 mIntent = intent; 4305 mComponent = intent.getComponent(); 4306 mActivityInfo = info; 4307 mTitle = title; 4308 mParent = parent; 4309 mEmbeddedID = id; 4310 mLastNonConfigurationInstances = lastNonConfigurationInstances; 4311 4312 mWindow.setWindowManager(null, mToken, mComponent.flattenToString(), 4313 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 4314 if (mParent != null) { 4315 mWindow.setContainer(mParent.getWindow()); 4316 } 4317 mWindowManager = mWindow.getWindowManager(); 4318 mCurrentConfig = config; 4319 } 4320 4321 final IBinder getActivityToken() { 4322 return mParent != null ? mParent.getActivityToken() : mToken; 4323 } 4324 4325 final void performCreate(Bundle icicle) { 4326 onCreate(icicle); 4327 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 4328 com.android.internal.R.styleable.Window_windowNoDisplay, false); 4329 mFragments.dispatchActivityCreated(); 4330 } 4331 4332 final void performStart() { 4333 mFragments.noteStateNotSaved(); 4334 mCalled = false; 4335 mFragments.execPendingActions(); 4336 mInstrumentation.callActivityOnStart(this); 4337 if (!mCalled) { 4338 throw new SuperNotCalledException( 4339 "Activity " + mComponent.toShortString() + 4340 " did not call through to super.onStart()"); 4341 } 4342 mFragments.dispatchStart(); 4343 if (mAllLoaderManagers != null) { 4344 for (int i=mAllLoaderManagers.size()-1; i>=0; i--) { 4345 mAllLoaderManagers.valueAt(i).finishRetain(); 4346 } 4347 } 4348 } 4349 4350 final void performRestart() { 4351 mFragments.noteStateNotSaved(); 4352 4353 synchronized (mManagedCursors) { 4354 final int N = mManagedCursors.size(); 4355 for (int i=0; i<N; i++) { 4356 ManagedCursor mc = mManagedCursors.get(i); 4357 if (mc.mReleased || mc.mUpdated) { 4358 if (!mc.mCursor.requery()) { 4359 throw new IllegalStateException( 4360 "trying to requery an already closed cursor"); 4361 } 4362 mc.mReleased = false; 4363 mc.mUpdated = false; 4364 } 4365 } 4366 } 4367 4368 if (mStopped) { 4369 mStopped = false; 4370 mCalled = false; 4371 mInstrumentation.callActivityOnRestart(this); 4372 if (!mCalled) { 4373 throw new SuperNotCalledException( 4374 "Activity " + mComponent.toShortString() + 4375 " did not call through to super.onRestart()"); 4376 } 4377 performStart(); 4378 } 4379 } 4380 4381 final void performResume() { 4382 performRestart(); 4383 4384 mFragments.execPendingActions(); 4385 4386 mLastNonConfigurationInstances = null; 4387 4388 mCalled = false; 4389 // mResumed is set by the instrumentation 4390 mInstrumentation.callActivityOnResume(this); 4391 if (!mCalled) { 4392 throw new SuperNotCalledException( 4393 "Activity " + mComponent.toShortString() + 4394 " did not call through to super.onResume()"); 4395 } 4396 4397 // Now really resume, and install the current status bar and menu. 4398 mCalled = false; 4399 4400 mFragments.dispatchResume(); 4401 mFragments.execPendingActions(); 4402 4403 onPostResume(); 4404 if (!mCalled) { 4405 throw new SuperNotCalledException( 4406 "Activity " + mComponent.toShortString() + 4407 " did not call through to super.onPostResume()"); 4408 } 4409 } 4410 4411 final void performPause() { 4412 mFragments.dispatchPause(); 4413 mCalled = false; 4414 onPause(); 4415 if (!mCalled && getApplicationInfo().targetSdkVersion 4416 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 4417 throw new SuperNotCalledException( 4418 "Activity " + mComponent.toShortString() + 4419 " did not call through to super.onPause()"); 4420 } 4421 mResumed = false; 4422 } 4423 4424 final void performUserLeaving() { 4425 onUserInteraction(); 4426 onUserLeaveHint(); 4427 } 4428 4429 final void performStop() { 4430 if (mLoadersStarted) { 4431 mLoadersStarted = false; 4432 if (mLoaderManager != null) { 4433 if (!mChangingConfigurations) { 4434 mLoaderManager.doStop(); 4435 } else { 4436 mLoaderManager.doRetain(); 4437 } 4438 } 4439 } 4440 4441 if (!mStopped) { 4442 if (mWindow != null) { 4443 mWindow.closeAllPanels(); 4444 } 4445 4446 mFragments.dispatchStop(); 4447 4448 mCalled = false; 4449 mInstrumentation.callActivityOnStop(this); 4450 if (!mCalled) { 4451 throw new SuperNotCalledException( 4452 "Activity " + mComponent.toShortString() + 4453 " did not call through to super.onStop()"); 4454 } 4455 4456 synchronized (mManagedCursors) { 4457 final int N = mManagedCursors.size(); 4458 for (int i=0; i<N; i++) { 4459 ManagedCursor mc = mManagedCursors.get(i); 4460 if (!mc.mReleased) { 4461 mc.mCursor.deactivate(); 4462 mc.mReleased = true; 4463 } 4464 } 4465 } 4466 4467 mStopped = true; 4468 } 4469 } 4470 4471 final void performDestroy() { 4472 mWindow.destroy(); 4473 mFragments.dispatchDestroy(); 4474 onDestroy(); 4475 if (mLoaderManager != null) { 4476 mLoaderManager.doDestroy(); 4477 } 4478 } 4479 4480 /** 4481 * @hide 4482 */ 4483 public final boolean isResumed() { 4484 return mResumed; 4485 } 4486 4487 void dispatchActivityResult(String who, int requestCode, 4488 int resultCode, Intent data) { 4489 if (Config.LOGV) Log.v( 4490 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 4491 + ", resCode=" + resultCode + ", data=" + data); 4492 mFragments.noteStateNotSaved(); 4493 if (who == null) { 4494 onActivityResult(requestCode, resultCode, data); 4495 } else { 4496 Fragment frag = mFragments.findFragmentByWho(who); 4497 if (frag != null) { 4498 frag.onActivityResult(requestCode, resultCode, data); 4499 } 4500 } 4501 } 4502} 4503