Activity.java revision f9c5e0fe837a3090820da502ecaabc5accc00ace
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.ComponentCallbacks2; 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.pm.PackageManager; 33import android.content.pm.PackageManager.NameNotFoundException; 34import android.content.res.Configuration; 35import android.content.res.Resources; 36import android.content.res.TypedArray; 37import android.database.Cursor; 38import android.graphics.Bitmap; 39import android.graphics.Canvas; 40import android.graphics.drawable.Drawable; 41import android.media.AudioManager; 42import android.net.Uri; 43import android.os.Build; 44import android.os.Bundle; 45import android.os.Handler; 46import android.os.IBinder; 47import android.os.Looper; 48import android.os.Parcelable; 49import android.os.RemoteException; 50import android.os.StrictMode; 51import android.os.UserHandle; 52import android.text.Selection; 53import android.text.SpannableStringBuilder; 54import android.text.TextUtils; 55import android.text.method.TextKeyListener; 56import android.util.AttributeSet; 57import android.util.EventLog; 58import android.util.Log; 59import android.util.Slog; 60import android.util.SparseArray; 61import android.view.ActionMode; 62import android.view.ContextMenu; 63import android.view.ContextMenu.ContextMenuInfo; 64import android.view.ContextThemeWrapper; 65import android.view.KeyEvent; 66import android.view.LayoutInflater; 67import android.view.Menu; 68import android.view.MenuInflater; 69import android.view.MenuItem; 70import android.view.MotionEvent; 71import android.view.View; 72import android.view.View.OnCreateContextMenuListener; 73import android.view.ViewGroup; 74import android.view.ViewGroup.LayoutParams; 75import android.view.ViewManager; 76import android.view.Window; 77import android.view.WindowManager; 78import android.view.WindowManagerGlobal; 79import android.view.accessibility.AccessibilityEvent; 80import android.widget.AdapterView; 81 82import java.io.FileDescriptor; 83import java.io.PrintWriter; 84import java.util.ArrayList; 85import java.util.HashMap; 86 87/** 88 * An activity is a single, focused thing that the user can do. Almost all 89 * activities interact with the user, so the Activity class takes care of 90 * creating a window for you in which you can place your UI with 91 * {@link #setContentView}. While activities are often presented to the user 92 * as full-screen windows, they can also be used in other ways: as floating 93 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 94 * or embedded inside of another activity (using {@link ActivityGroup}). 95 * 96 * There are two methods almost all subclasses of Activity will implement: 97 * 98 * <ul> 99 * <li> {@link #onCreate} is where you initialize your activity. Most 100 * importantly, here you will usually call {@link #setContentView(int)} 101 * with a layout resource defining your UI, and using {@link #findViewById} 102 * to retrieve the widgets in that UI that you need to interact with 103 * programmatically. 104 * 105 * <li> {@link #onPause} is where you deal with the user leaving your 106 * activity. Most importantly, any changes made by the user should at this 107 * point be committed (usually to the 108 * {@link android.content.ContentProvider} holding the data). 109 * </ul> 110 * 111 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 112 * activity classes must have a corresponding 113 * {@link android.R.styleable#AndroidManifestActivity <activity>} 114 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 115 * 116 * <p>Topics covered here: 117 * <ol> 118 * <li><a href="#Fragments">Fragments</a> 119 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 120 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 121 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 122 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 123 * <li><a href="#Permissions">Permissions</a> 124 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 125 * </ol> 126 * 127 * <div class="special reference"> 128 * <h3>Developer Guides</h3> 129 * <p>The Activity class is an important part of an application's overall lifecycle, 130 * and the way activities are launched and put together is a fundamental 131 * part of the platform's application model. For a detailed perspective on the structure of an 132 * Android application and how activities behave, please read the 133 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 134 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 135 * developer guides.</p> 136 * 137 * <p>You can also find a detailed discussion about how to create activities in the 138 * <a href="{@docRoot}guide/topics/fundamentals/activities.html">Activities</a> 139 * developer guide.</p> 140 * </div> 141 * 142 * <a name="Fragments"></a> 143 * <h3>Fragments</h3> 144 * 145 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 146 * implementations can make use of the {@link Fragment} class to better 147 * modularize their code, build more sophisticated user interfaces for larger 148 * screens, and help scale their application between small and large screens. 149 * 150 * <a name="ActivityLifecycle"></a> 151 * <h3>Activity Lifecycle</h3> 152 * 153 * <p>Activities in the system are managed as an <em>activity stack</em>. 154 * When a new activity is started, it is placed on the top of the stack 155 * and becomes the running activity -- the previous activity always remains 156 * below it in the stack, and will not come to the foreground again until 157 * the new activity exits.</p> 158 * 159 * <p>An activity has essentially four states:</p> 160 * <ul> 161 * <li> If an activity in the foreground of the screen (at the top of 162 * the stack), 163 * it is <em>active</em> or <em>running</em>. </li> 164 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 165 * or transparent activity has focus on top of your activity), it 166 * is <em>paused</em>. A paused activity is completely alive (it 167 * maintains all state and member information and remains attached to 168 * the window manager), but can be killed by the system in extreme 169 * low memory situations. 170 * <li>If an activity is completely obscured by another activity, 171 * it is <em>stopped</em>. It still retains all state and member information, 172 * however, it is no longer visible to the user so its window is hidden 173 * and it will often be killed by the system when memory is needed 174 * elsewhere.</li> 175 * <li>If an activity is paused or stopped, the system can drop the activity 176 * from memory by either asking it to finish, or simply killing its 177 * process. When it is displayed again to the user, it must be 178 * completely restarted and restored to its previous state.</li> 179 * </ul> 180 * 181 * <p>The following diagram shows the important state paths of an Activity. 182 * The square rectangles represent callback methods you can implement to 183 * perform operations when the Activity moves between states. The colored 184 * ovals are major states the Activity can be in.</p> 185 * 186 * <p><img src="../../../images/activity_lifecycle.png" 187 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 188 * 189 * <p>There are three key loops you may be interested in monitoring within your 190 * activity: 191 * 192 * <ul> 193 * <li>The <b>entire lifetime</b> of an activity happens between the first call 194 * to {@link android.app.Activity#onCreate} through to a single final call 195 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 196 * of "global" state in onCreate(), and release all remaining resources in 197 * onDestroy(). For example, if it has a thread running in the background 198 * to download data from the network, it may create that thread in onCreate() 199 * and then stop the thread in onDestroy(). 200 * 201 * <li>The <b>visible lifetime</b> of an activity happens between a call to 202 * {@link android.app.Activity#onStart} until a corresponding call to 203 * {@link android.app.Activity#onStop}. During this time the user can see the 204 * activity on-screen, though it may not be in the foreground and interacting 205 * with the user. Between these two methods you can maintain resources that 206 * are needed to show the activity to the user. For example, you can register 207 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 208 * that impact your UI, and unregister it in onStop() when the user no 209 * longer sees what you are displaying. The onStart() and onStop() methods 210 * can be called multiple times, as the activity becomes visible and hidden 211 * to the user. 212 * 213 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 214 * {@link android.app.Activity#onResume} until a corresponding call to 215 * {@link android.app.Activity#onPause}. During this time the activity is 216 * in front of all other activities and interacting with the user. An activity 217 * can frequently go between the resumed and paused states -- for example when 218 * the device goes to sleep, when an activity result is delivered, when a new 219 * intent is delivered -- so the code in these methods should be fairly 220 * lightweight. 221 * </ul> 222 * 223 * <p>The entire lifecycle of an activity is defined by the following 224 * Activity methods. All of these are hooks that you can override 225 * to do appropriate work when the activity changes state. All 226 * activities will implement {@link android.app.Activity#onCreate} 227 * to do their initial setup; many will also implement 228 * {@link android.app.Activity#onPause} to commit changes to data and 229 * otherwise prepare to stop interacting with the user. You should always 230 * call up to your superclass when implementing these methods.</p> 231 * 232 * </p> 233 * <pre class="prettyprint"> 234 * public class Activity extends ApplicationContext { 235 * protected void onCreate(Bundle savedInstanceState); 236 * 237 * protected void onStart(); 238 * 239 * protected void onRestart(); 240 * 241 * protected void onResume(); 242 * 243 * protected void onPause(); 244 * 245 * protected void onStop(); 246 * 247 * protected void onDestroy(); 248 * } 249 * </pre> 250 * 251 * <p>In general the movement through an activity's lifecycle looks like 252 * this:</p> 253 * 254 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 255 * <colgroup align="left" span="3" /> 256 * <colgroup align="left" /> 257 * <colgroup align="center" /> 258 * <colgroup align="center" /> 259 * 260 * <thead> 261 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 262 * </thead> 263 * 264 * <tbody> 265 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 266 * <td>Called when the activity is first created. 267 * This is where you should do all of your normal static set up: 268 * create views, bind data to lists, etc. This method also 269 * provides you with a Bundle containing the activity's previously 270 * frozen state, if there was one. 271 * <p>Always followed by <code>onStart()</code>.</td> 272 * <td align="center">No</td> 273 * <td align="center"><code>onStart()</code></td> 274 * </tr> 275 * 276 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 277 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 278 * <td>Called after your activity has been stopped, prior to it being 279 * started again. 280 * <p>Always followed by <code>onStart()</code></td> 281 * <td align="center">No</td> 282 * <td align="center"><code>onStart()</code></td> 283 * </tr> 284 * 285 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 286 * <td>Called when the activity is becoming visible to the user. 287 * <p>Followed by <code>onResume()</code> if the activity comes 288 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 289 * <td align="center">No</td> 290 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 291 * </tr> 292 * 293 * <tr><td rowspan="2" style="border-left: none;"> </td> 294 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 295 * <td>Called when the activity will start 296 * interacting with the user. At this point your activity is at 297 * the top of the activity stack, with user input going to it. 298 * <p>Always followed by <code>onPause()</code>.</td> 299 * <td align="center">No</td> 300 * <td align="center"><code>onPause()</code></td> 301 * </tr> 302 * 303 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 304 * <td>Called when the system is about to start resuming a previous 305 * activity. This is typically used to commit unsaved changes to 306 * persistent data, stop animations and other things that may be consuming 307 * CPU, etc. Implementations of this method must be very quick because 308 * the next activity will not be resumed until this method returns. 309 * <p>Followed by either <code>onResume()</code> if the activity 310 * returns back to the front, or <code>onStop()</code> if it becomes 311 * invisible to the user.</td> 312 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 313 * <td align="center"><code>onResume()</code> or<br> 314 * <code>onStop()</code></td> 315 * </tr> 316 * 317 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 318 * <td>Called when the activity is no longer visible to the user, because 319 * another activity has been resumed and is covering this one. This 320 * may happen either because a new activity is being started, an existing 321 * one is being brought in front of this one, or this one is being 322 * destroyed. 323 * <p>Followed by either <code>onRestart()</code> if 324 * this activity is coming back to interact with the user, or 325 * <code>onDestroy()</code> if this activity is going away.</td> 326 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 327 * <td align="center"><code>onRestart()</code> or<br> 328 * <code>onDestroy()</code></td> 329 * </tr> 330 * 331 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 332 * <td>The final call you receive before your 333 * activity is destroyed. This can happen either because the 334 * activity is finishing (someone called {@link Activity#finish} on 335 * it, or because the system is temporarily destroying this 336 * instance of the activity to save space. You can distinguish 337 * between these two scenarios with the {@link 338 * Activity#isFinishing} method.</td> 339 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 340 * <td align="center"><em>nothing</em></td> 341 * </tr> 342 * </tbody> 343 * </table> 344 * 345 * <p>Note the "Killable" column in the above table -- for those methods that 346 * are marked as being killable, after that method returns the process hosting the 347 * activity may killed by the system <em>at any time</em> without another line 348 * of its code being executed. Because of this, you should use the 349 * {@link #onPause} method to write any persistent data (such as user edits) 350 * to storage. In addition, the method 351 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 352 * in such a background state, allowing you to save away any dynamic instance 353 * state in your activity into the given Bundle, to be later received in 354 * {@link #onCreate} if the activity needs to be re-created. 355 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 356 * section for more information on how the lifecycle of a process is tied 357 * to the activities it is hosting. Note that it is important to save 358 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 359 * because the latter is not part of the lifecycle callbacks, so will not 360 * be called in every situation as described in its documentation.</p> 361 * 362 * <p class="note">Be aware that these semantics will change slightly between 363 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 364 * vs. those targeting prior platforms. Starting with Honeycomb, an application 365 * is not in the killable state until its {@link #onStop} has returned. This 366 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 367 * safely called after {@link #onPause()} and allows and application to safely 368 * wait until {@link #onStop()} to save persistent state.</p> 369 * 370 * <p>For those methods that are not marked as being killable, the activity's 371 * process will not be killed by the system starting from the time the method 372 * is called and continuing after it returns. Thus an activity is in the killable 373 * state, for example, between after <code>onPause()</code> to the start of 374 * <code>onResume()</code>.</p> 375 * 376 * <a name="ConfigurationChanges"></a> 377 * <h3>Configuration Changes</h3> 378 * 379 * <p>If the configuration of the device (as defined by the 380 * {@link Configuration Resources.Configuration} class) changes, 381 * then anything displaying a user interface will need to update to match that 382 * configuration. Because Activity is the primary mechanism for interacting 383 * with the user, it includes special support for handling configuration 384 * changes.</p> 385 * 386 * <p>Unless you specify otherwise, a configuration change (such as a change 387 * in screen orientation, language, input devices, etc) will cause your 388 * current activity to be <em>destroyed</em>, going through the normal activity 389 * lifecycle process of {@link #onPause}, 390 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 391 * had been in the foreground or visible to the user, once {@link #onDestroy} is 392 * called in that instance then a new instance of the activity will be 393 * created, with whatever savedInstanceState the previous instance had generated 394 * from {@link #onSaveInstanceState}.</p> 395 * 396 * <p>This is done because any application resource, 397 * including layout files, can change based on any configuration value. Thus 398 * the only safe way to handle a configuration change is to re-retrieve all 399 * resources, including layouts, drawables, and strings. Because activities 400 * must already know how to save their state and re-create themselves from 401 * that state, this is a convenient way to have an activity restart itself 402 * with a new configuration.</p> 403 * 404 * <p>In some special cases, you may want to bypass restarting of your 405 * activity based on one or more types of configuration changes. This is 406 * done with the {@link android.R.attr#configChanges android:configChanges} 407 * attribute in its manifest. For any types of configuration changes you say 408 * that you handle there, you will receive a call to your current activity's 409 * {@link #onConfigurationChanged} method instead of being restarted. If 410 * a configuration change involves any that you do not handle, however, the 411 * activity will still be restarted and {@link #onConfigurationChanged} 412 * will not be called.</p> 413 * 414 * <a name="StartingActivities"></a> 415 * <h3>Starting Activities and Getting Results</h3> 416 * 417 * <p>The {@link android.app.Activity#startActivity} 418 * method is used to start a 419 * new activity, which will be placed at the top of the activity stack. It 420 * takes a single argument, an {@link android.content.Intent Intent}, 421 * which describes the activity 422 * to be executed.</p> 423 * 424 * <p>Sometimes you want to get a result back from an activity when it 425 * ends. For example, you may start an activity that lets the user pick 426 * a person in a list of contacts; when it ends, it returns the person 427 * that was selected. To do this, you call the 428 * {@link android.app.Activity#startActivityForResult(Intent, int)} 429 * version with a second integer parameter identifying the call. The result 430 * will come back through your {@link android.app.Activity#onActivityResult} 431 * method.</p> 432 * 433 * <p>When an activity exits, it can call 434 * {@link android.app.Activity#setResult(int)} 435 * to return data back to its parent. It must always supply a result code, 436 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 437 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 438 * return back an Intent containing any additional data it wants. All of this 439 * information appears back on the 440 * parent's <code>Activity.onActivityResult()</code>, along with the integer 441 * identifier it originally supplied.</p> 442 * 443 * <p>If a child activity fails for any reason (such as crashing), the parent 444 * activity will receive a result with the code RESULT_CANCELED.</p> 445 * 446 * <pre class="prettyprint"> 447 * public class MyActivity extends Activity { 448 * ... 449 * 450 * static final int PICK_CONTACT_REQUEST = 0; 451 * 452 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 453 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 454 * // When the user center presses, let them pick a contact. 455 * startActivityForResult( 456 * new Intent(Intent.ACTION_PICK, 457 * new Uri("content://contacts")), 458 * PICK_CONTACT_REQUEST); 459 * return true; 460 * } 461 * return false; 462 * } 463 * 464 * protected void onActivityResult(int requestCode, int resultCode, 465 * Intent data) { 466 * if (requestCode == PICK_CONTACT_REQUEST) { 467 * if (resultCode == RESULT_OK) { 468 * // A contact was picked. Here we will just display it 469 * // to the user. 470 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 471 * } 472 * } 473 * } 474 * } 475 * </pre> 476 * 477 * <a name="SavingPersistentState"></a> 478 * <h3>Saving Persistent State</h3> 479 * 480 * <p>There are generally two kinds of persistent state than an activity 481 * will deal with: shared document-like data (typically stored in a SQLite 482 * database using a {@linkplain android.content.ContentProvider content provider}) 483 * and internal state such as user preferences.</p> 484 * 485 * <p>For content provider data, we suggest that activities use a 486 * "edit in place" user model. That is, any edits a user makes are effectively 487 * made immediately without requiring an additional confirmation step. 488 * Supporting this model is generally a simple matter of following two rules:</p> 489 * 490 * <ul> 491 * <li> <p>When creating a new document, the backing database entry or file for 492 * it is created immediately. For example, if the user chooses to write 493 * a new e-mail, a new entry for that e-mail is created as soon as they 494 * start entering data, so that if they go to any other activity after 495 * that point this e-mail will now appear in the list of drafts.</p> 496 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 497 * commit to the backing content provider or file any changes the user 498 * has made. This ensures that those changes will be seen by any other 499 * activity that is about to run. You will probably want to commit 500 * your data even more aggressively at key times during your 501 * activity's lifecycle: for example before starting a new 502 * activity, before finishing your own activity, when the user 503 * switches between input fields, etc.</p> 504 * </ul> 505 * 506 * <p>This model is designed to prevent data loss when a user is navigating 507 * between activities, and allows the system to safely kill an activity (because 508 * system resources are needed somewhere else) at any time after it has been 509 * paused. Note this implies 510 * that the user pressing BACK from your activity does <em>not</em> 511 * mean "cancel" -- it means to leave the activity with its current contents 512 * saved away. Canceling edits in an activity must be provided through 513 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 514 * 515 * <p>See the {@linkplain android.content.ContentProvider content package} for 516 * more information about content providers. These are a key aspect of how 517 * different activities invoke and propagate data between themselves.</p> 518 * 519 * <p>The Activity class also provides an API for managing internal persistent state 520 * associated with an activity. This can be used, for example, to remember 521 * the user's preferred initial display in a calendar (day view or week view) 522 * or the user's default home page in a web browser.</p> 523 * 524 * <p>Activity persistent state is managed 525 * with the method {@link #getPreferences}, 526 * allowing you to retrieve and 527 * modify a set of name/value pairs associated with the activity. To use 528 * preferences that are shared across multiple application components 529 * (activities, receivers, services, providers), you can use the underlying 530 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 531 * to retrieve a preferences 532 * object stored under a specific name. 533 * (Note that it is not possible to share settings data across application 534 * packages -- for that you will need a content provider.)</p> 535 * 536 * <p>Here is an excerpt from a calendar activity that stores the user's 537 * preferred view mode in its persistent settings:</p> 538 * 539 * <pre class="prettyprint"> 540 * public class CalendarActivity extends Activity { 541 * ... 542 * 543 * static final int DAY_VIEW_MODE = 0; 544 * static final int WEEK_VIEW_MODE = 1; 545 * 546 * private SharedPreferences mPrefs; 547 * private int mCurViewMode; 548 * 549 * protected void onCreate(Bundle savedInstanceState) { 550 * super.onCreate(savedInstanceState); 551 * 552 * SharedPreferences mPrefs = getSharedPreferences(); 553 * mCurViewMode = mPrefs.getInt("view_mode", DAY_VIEW_MODE); 554 * } 555 * 556 * protected void onPause() { 557 * super.onPause(); 558 * 559 * SharedPreferences.Editor ed = mPrefs.edit(); 560 * ed.putInt("view_mode", mCurViewMode); 561 * ed.commit(); 562 * } 563 * } 564 * </pre> 565 * 566 * <a name="Permissions"></a> 567 * <h3>Permissions</h3> 568 * 569 * <p>The ability to start a particular Activity can be enforced when it is 570 * declared in its 571 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 572 * tag. By doing so, other applications will need to declare a corresponding 573 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 574 * element in their own manifest to be able to start that activity. 575 * 576 * <p>When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 577 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 578 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the 579 * Activity access to the specific URIs in the Intent. Access will remain 580 * until the Activity has finished (it will remain across the hosting 581 * process being killed and other temporary destruction). As of 582 * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity 583 * was already created and a new Intent is being delivered to 584 * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added 585 * to the existing ones it holds. 586 * 587 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 588 * document for more information on permissions and security in general. 589 * 590 * <a name="ProcessLifecycle"></a> 591 * <h3>Process Lifecycle</h3> 592 * 593 * <p>The Android system attempts to keep application process around for as 594 * long as possible, but eventually will need to remove old processes when 595 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 596 * Lifecycle</a>, the decision about which process to remove is intimately 597 * tied to the state of the user's interaction with it. In general, there 598 * are four states a process can be in based on the activities running in it, 599 * listed here in order of importance. The system will kill less important 600 * processes (the last ones) before it resorts to killing more important 601 * processes (the first ones). 602 * 603 * <ol> 604 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 605 * that the user is currently interacting with) is considered the most important. 606 * Its process will only be killed as a last resort, if it uses more memory 607 * than is available on the device. Generally at this point the device has 608 * reached a memory paging state, so this is required in order to keep the user 609 * interface responsive. 610 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 611 * but not in the foreground, such as one sitting behind a foreground dialog) 612 * is considered extremely important and will not be killed unless that is 613 * required to keep the foreground activity running. 614 * <li> <p>A <b>background activity</b> (an activity that is not visible to 615 * the user and has been paused) is no longer critical, so the system may 616 * safely kill its process to reclaim memory for other foreground or 617 * visible processes. If its process needs to be killed, when the user navigates 618 * back to the activity (making it visible on the screen again), its 619 * {@link #onCreate} method will be called with the savedInstanceState it had previously 620 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 621 * state as the user last left it. 622 * <li> <p>An <b>empty process</b> is one hosting no activities or other 623 * application components (such as {@link Service} or 624 * {@link android.content.BroadcastReceiver} classes). These are killed very 625 * quickly by the system as memory becomes low. For this reason, any 626 * background operation you do outside of an activity must be executed in the 627 * context of an activity BroadcastReceiver or Service to ensure that the system 628 * knows it needs to keep your process around. 629 * </ol> 630 * 631 * <p>Sometimes an Activity may need to do a long-running operation that exists 632 * independently of the activity lifecycle itself. An example may be a camera 633 * application that allows you to upload a picture to a web site. The upload 634 * may take a long time, and the application should allow the user to leave 635 * the application will it is executing. To accomplish this, your Activity 636 * should start a {@link Service} in which the upload takes place. This allows 637 * the system to properly prioritize your process (considering it to be more 638 * important than other non-visible applications) for the duration of the 639 * upload, independent of whether the original activity is paused, stopped, 640 * or finished. 641 */ 642public class Activity extends ContextThemeWrapper 643 implements LayoutInflater.Factory2, 644 Window.Callback, KeyEvent.Callback, 645 OnCreateContextMenuListener, ComponentCallbacks2 { 646 private static final String TAG = "Activity"; 647 private static final boolean DEBUG_LIFECYCLE = false; 648 649 /** Standard activity result: operation canceled. */ 650 public static final int RESULT_CANCELED = 0; 651 /** Standard activity result: operation succeeded. */ 652 public static final int RESULT_OK = -1; 653 /** Start of user-defined activity results. */ 654 public static final int RESULT_FIRST_USER = 1; 655 656 static final String FRAGMENTS_TAG = "android:fragments"; 657 658 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 659 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 660 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 661 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 662 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 663 664 private static class ManagedDialog { 665 Dialog mDialog; 666 Bundle mArgs; 667 } 668 private SparseArray<ManagedDialog> mManagedDialogs; 669 670 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 671 private Instrumentation mInstrumentation; 672 private IBinder mToken; 673 private int mIdent; 674 /*package*/ String mEmbeddedID; 675 private Application mApplication; 676 /*package*/ Intent mIntent; 677 private ComponentName mComponent; 678 /*package*/ ActivityInfo mActivityInfo; 679 /*package*/ ActivityThread mMainThread; 680 Activity mParent; 681 boolean mCalled; 682 boolean mCheckedForLoaderManager; 683 boolean mLoadersStarted; 684 /*package*/ boolean mResumed; 685 private boolean mStopped; 686 boolean mFinished; 687 boolean mStartedActivity; 688 private boolean mDestroyed; 689 /** true if the activity is going through a transient pause */ 690 /*package*/ boolean mTemporaryPause = false; 691 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 692 /*package*/ boolean mChangingConfigurations = false; 693 /*package*/ int mConfigChangeFlags; 694 /*package*/ Configuration mCurrentConfig; 695 private SearchManager mSearchManager; 696 private MenuInflater mMenuInflater; 697 698 static final class NonConfigurationInstances { 699 Object activity; 700 HashMap<String, Object> children; 701 ArrayList<Fragment> fragments; 702 HashMap<String, LoaderManagerImpl> loaders; 703 } 704 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 705 706 private Window mWindow; 707 708 private WindowManager mWindowManager; 709 /*package*/ View mDecor = null; 710 /*package*/ boolean mWindowAdded = false; 711 /*package*/ boolean mVisibleFromServer = false; 712 /*package*/ boolean mVisibleFromClient = true; 713 /*package*/ ActionBarImpl mActionBar = null; 714 private boolean mEnableDefaultActionBarUp; 715 716 private CharSequence mTitle; 717 private int mTitleColor = 0; 718 719 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 720 final FragmentContainer mContainer = new FragmentContainer() { 721 @Override 722 public View findViewById(int id) { 723 return Activity.this.findViewById(id); 724 } 725 }; 726 727 HashMap<String, LoaderManagerImpl> mAllLoaderManagers; 728 LoaderManagerImpl mLoaderManager; 729 730 private static final class ManagedCursor { 731 ManagedCursor(Cursor cursor) { 732 mCursor = cursor; 733 mReleased = false; 734 mUpdated = false; 735 } 736 737 private final Cursor mCursor; 738 private boolean mReleased; 739 private boolean mUpdated; 740 } 741 private final ArrayList<ManagedCursor> mManagedCursors = 742 new ArrayList<ManagedCursor>(); 743 744 // protected by synchronized (this) 745 int mResultCode = RESULT_CANCELED; 746 Intent mResultData = null; 747 748 private boolean mTitleReady = false; 749 750 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 751 private SpannableStringBuilder mDefaultKeySsb = null; 752 753 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 754 755 @SuppressWarnings("unused") 756 private final Object mInstanceTracker = StrictMode.trackActivity(this); 757 758 private Thread mUiThread; 759 final Handler mHandler = new Handler(); 760 761 /** Return the intent that started this activity. */ 762 public Intent getIntent() { 763 return mIntent; 764 } 765 766 /** 767 * Change the intent returned by {@link #getIntent}. This holds a 768 * reference to the given intent; it does not copy it. Often used in 769 * conjunction with {@link #onNewIntent}. 770 * 771 * @param newIntent The new Intent object to return from getIntent 772 * 773 * @see #getIntent 774 * @see #onNewIntent 775 */ 776 public void setIntent(Intent newIntent) { 777 mIntent = newIntent; 778 } 779 780 /** Return the application that owns this activity. */ 781 public final Application getApplication() { 782 return mApplication; 783 } 784 785 /** Is this activity embedded inside of another activity? */ 786 public final boolean isChild() { 787 return mParent != null; 788 } 789 790 /** Return the parent activity if this view is an embedded child. */ 791 public final Activity getParent() { 792 return mParent; 793 } 794 795 /** Retrieve the window manager for showing custom windows. */ 796 public WindowManager getWindowManager() { 797 return mWindowManager; 798 } 799 800 /** 801 * Retrieve the current {@link android.view.Window} for the activity. 802 * This can be used to directly access parts of the Window API that 803 * are not available through Activity/Screen. 804 * 805 * @return Window The current window, or null if the activity is not 806 * visual. 807 */ 808 public Window getWindow() { 809 return mWindow; 810 } 811 812 /** 813 * Return the LoaderManager for this fragment, creating it if needed. 814 */ 815 public LoaderManager getLoaderManager() { 816 if (mLoaderManager != null) { 817 return mLoaderManager; 818 } 819 mCheckedForLoaderManager = true; 820 mLoaderManager = getLoaderManager(null, mLoadersStarted, true); 821 return mLoaderManager; 822 } 823 824 LoaderManagerImpl getLoaderManager(String who, boolean started, boolean create) { 825 if (mAllLoaderManagers == null) { 826 mAllLoaderManagers = new HashMap<String, LoaderManagerImpl>(); 827 } 828 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 829 if (lm == null) { 830 if (create) { 831 lm = new LoaderManagerImpl(who, this, started); 832 mAllLoaderManagers.put(who, lm); 833 } 834 } else { 835 lm.updateActivity(this); 836 } 837 return lm; 838 } 839 840 /** 841 * Calls {@link android.view.Window#getCurrentFocus} on the 842 * Window of this Activity to return the currently focused view. 843 * 844 * @return View The current View with focus or null. 845 * 846 * @see #getWindow 847 * @see android.view.Window#getCurrentFocus 848 */ 849 public View getCurrentFocus() { 850 return mWindow != null ? mWindow.getCurrentFocus() : null; 851 } 852 853 /** 854 * Called when the activity is starting. This is where most initialization 855 * should go: calling {@link #setContentView(int)} to inflate the 856 * activity's UI, using {@link #findViewById} to programmatically interact 857 * with widgets in the UI, calling 858 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 859 * cursors for data being displayed, etc. 860 * 861 * <p>You can call {@link #finish} from within this function, in 862 * which case onDestroy() will be immediately called without any of the rest 863 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 864 * {@link #onPause}, etc) executing. 865 * 866 * <p><em>Derived classes must call through to the super class's 867 * implementation of this method. If they do not, an exception will be 868 * thrown.</em></p> 869 * 870 * @param savedInstanceState If the activity is being re-initialized after 871 * previously being shut down then this Bundle contains the data it most 872 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 873 * 874 * @see #onStart 875 * @see #onSaveInstanceState 876 * @see #onRestoreInstanceState 877 * @see #onPostCreate 878 */ 879 protected void onCreate(Bundle savedInstanceState) { 880 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState); 881 if (mLastNonConfigurationInstances != null) { 882 mAllLoaderManagers = mLastNonConfigurationInstances.loaders; 883 } 884 if (mActivityInfo.parentActivityName != null) { 885 if (mActionBar == null) { 886 mEnableDefaultActionBarUp = true; 887 } else { 888 mActionBar.setDefaultDisplayHomeAsUpEnabled(true); 889 } 890 } 891 if (savedInstanceState != null) { 892 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 893 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 894 ? mLastNonConfigurationInstances.fragments : null); 895 } 896 mFragments.dispatchCreate(); 897 getApplication().dispatchActivityCreated(this, savedInstanceState); 898 mCalled = true; 899 } 900 901 /** 902 * The hook for {@link ActivityThread} to restore the state of this activity. 903 * 904 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 905 * {@link #restoreManagedDialogs(android.os.Bundle)}. 906 * 907 * @param savedInstanceState contains the saved state 908 */ 909 final void performRestoreInstanceState(Bundle savedInstanceState) { 910 onRestoreInstanceState(savedInstanceState); 911 restoreManagedDialogs(savedInstanceState); 912 } 913 914 /** 915 * This method is called after {@link #onStart} when the activity is 916 * being re-initialized from a previously saved state, given here in 917 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 918 * to restore their state, but it is sometimes convenient to do it here 919 * after all of the initialization has been done or to allow subclasses to 920 * decide whether to use your default implementation. The default 921 * implementation of this method performs a restore of any view state that 922 * had previously been frozen by {@link #onSaveInstanceState}. 923 * 924 * <p>This method is called between {@link #onStart} and 925 * {@link #onPostCreate}. 926 * 927 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 928 * 929 * @see #onCreate 930 * @see #onPostCreate 931 * @see #onResume 932 * @see #onSaveInstanceState 933 */ 934 protected void onRestoreInstanceState(Bundle savedInstanceState) { 935 if (mWindow != null) { 936 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 937 if (windowState != null) { 938 mWindow.restoreHierarchyState(windowState); 939 } 940 } 941 } 942 943 /** 944 * Restore the state of any saved managed dialogs. 945 * 946 * @param savedInstanceState The bundle to restore from. 947 */ 948 private void restoreManagedDialogs(Bundle savedInstanceState) { 949 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 950 if (b == null) { 951 return; 952 } 953 954 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 955 final int numDialogs = ids.length; 956 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 957 for (int i = 0; i < numDialogs; i++) { 958 final Integer dialogId = ids[i]; 959 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 960 if (dialogState != null) { 961 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 962 // so tell createDialog() not to do it, otherwise we get an exception 963 final ManagedDialog md = new ManagedDialog(); 964 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 965 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 966 if (md.mDialog != null) { 967 mManagedDialogs.put(dialogId, md); 968 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 969 md.mDialog.onRestoreInstanceState(dialogState); 970 } 971 } 972 } 973 } 974 975 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 976 final Dialog dialog = onCreateDialog(dialogId, args); 977 if (dialog == null) { 978 return null; 979 } 980 dialog.dispatchOnCreate(state); 981 return dialog; 982 } 983 984 private static String savedDialogKeyFor(int key) { 985 return SAVED_DIALOG_KEY_PREFIX + key; 986 } 987 988 private static String savedDialogArgsKeyFor(int key) { 989 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 990 } 991 992 /** 993 * Called when activity start-up is complete (after {@link #onStart} 994 * and {@link #onRestoreInstanceState} have been called). Applications will 995 * generally not implement this method; it is intended for system 996 * classes to do final initialization after application code has run. 997 * 998 * <p><em>Derived classes must call through to the super class's 999 * implementation of this method. If they do not, an exception will be 1000 * thrown.</em></p> 1001 * 1002 * @param savedInstanceState If the activity is being re-initialized after 1003 * previously being shut down then this Bundle contains the data it most 1004 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1005 * @see #onCreate 1006 */ 1007 protected void onPostCreate(Bundle savedInstanceState) { 1008 if (!isChild()) { 1009 mTitleReady = true; 1010 onTitleChanged(getTitle(), getTitleColor()); 1011 } 1012 mCalled = true; 1013 } 1014 1015 /** 1016 * Called after {@link #onCreate} — or after {@link #onRestart} when 1017 * the activity had been stopped, but is now again being displayed to the 1018 * user. It will be followed by {@link #onResume}. 1019 * 1020 * <p><em>Derived classes must call through to the super class's 1021 * implementation of this method. If they do not, an exception will be 1022 * thrown.</em></p> 1023 * 1024 * @see #onCreate 1025 * @see #onStop 1026 * @see #onResume 1027 */ 1028 protected void onStart() { 1029 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStart " + this); 1030 mCalled = true; 1031 1032 if (!mLoadersStarted) { 1033 mLoadersStarted = true; 1034 if (mLoaderManager != null) { 1035 mLoaderManager.doStart(); 1036 } else if (!mCheckedForLoaderManager) { 1037 mLoaderManager = getLoaderManager(null, mLoadersStarted, false); 1038 } 1039 mCheckedForLoaderManager = true; 1040 } 1041 1042 getApplication().dispatchActivityStarted(this); 1043 } 1044 1045 /** 1046 * Called after {@link #onStop} when the current activity is being 1047 * re-displayed to the user (the user has navigated back to it). It will 1048 * be followed by {@link #onStart} and then {@link #onResume}. 1049 * 1050 * <p>For activities that are using raw {@link Cursor} objects (instead of 1051 * creating them through 1052 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1053 * this is usually the place 1054 * where the cursor should be requeried (because you had deactivated it in 1055 * {@link #onStop}. 1056 * 1057 * <p><em>Derived classes must call through to the super class's 1058 * implementation of this method. If they do not, an exception will be 1059 * thrown.</em></p> 1060 * 1061 * @see #onStop 1062 * @see #onStart 1063 * @see #onResume 1064 */ 1065 protected void onRestart() { 1066 mCalled = true; 1067 } 1068 1069 /** 1070 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1071 * {@link #onPause}, for your activity to start interacting with the user. 1072 * This is a good place to begin animations, open exclusive-access devices 1073 * (such as the camera), etc. 1074 * 1075 * <p>Keep in mind that onResume is not the best indicator that your activity 1076 * is visible to the user; a system window such as the keyguard may be in 1077 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1078 * activity is visible to the user (for example, to resume a game). 1079 * 1080 * <p><em>Derived classes must call through to the super class's 1081 * implementation of this method. If they do not, an exception will be 1082 * thrown.</em></p> 1083 * 1084 * @see #onRestoreInstanceState 1085 * @see #onRestart 1086 * @see #onPostResume 1087 * @see #onPause 1088 */ 1089 protected void onResume() { 1090 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this); 1091 getApplication().dispatchActivityResumed(this); 1092 mCalled = true; 1093 } 1094 1095 /** 1096 * Called when activity resume is complete (after {@link #onResume} has 1097 * been called). Applications will generally not implement this method; 1098 * it is intended for system classes to do final setup after application 1099 * resume code has run. 1100 * 1101 * <p><em>Derived classes must call through to the super class's 1102 * implementation of this method. If they do not, an exception will be 1103 * thrown.</em></p> 1104 * 1105 * @see #onResume 1106 */ 1107 protected void onPostResume() { 1108 final Window win = getWindow(); 1109 if (win != null) win.makeActive(); 1110 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1111 mCalled = true; 1112 } 1113 1114 /** 1115 * This is called for activities that set launchMode to "singleTop" in 1116 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1117 * flag when calling {@link #startActivity}. In either case, when the 1118 * activity is re-launched while at the top of the activity stack instead 1119 * of a new instance of the activity being started, onNewIntent() will be 1120 * called on the existing instance with the Intent that was used to 1121 * re-launch it. 1122 * 1123 * <p>An activity will always be paused before receiving a new intent, so 1124 * you can count on {@link #onResume} being called after this method. 1125 * 1126 * <p>Note that {@link #getIntent} still returns the original Intent. You 1127 * can use {@link #setIntent} to update it to this new Intent. 1128 * 1129 * @param intent The new intent that was started for the activity. 1130 * 1131 * @see #getIntent 1132 * @see #setIntent 1133 * @see #onResume 1134 */ 1135 protected void onNewIntent(Intent intent) { 1136 } 1137 1138 /** 1139 * The hook for {@link ActivityThread} to save the state of this activity. 1140 * 1141 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1142 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1143 * 1144 * @param outState The bundle to save the state to. 1145 */ 1146 final void performSaveInstanceState(Bundle outState) { 1147 onSaveInstanceState(outState); 1148 saveManagedDialogs(outState); 1149 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState); 1150 } 1151 1152 /** 1153 * Called to retrieve per-instance state from an activity before being killed 1154 * so that the state can be restored in {@link #onCreate} or 1155 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1156 * will be passed to both). 1157 * 1158 * <p>This method is called before an activity may be killed so that when it 1159 * comes back some time in the future it can restore its state. For example, 1160 * if activity B is launched in front of activity A, and at some point activity 1161 * A is killed to reclaim resources, activity A will have a chance to save the 1162 * current state of its user interface via this method so that when the user 1163 * returns to activity A, the state of the user interface can be restored 1164 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1165 * 1166 * <p>Do not confuse this method with activity lifecycle callbacks such as 1167 * {@link #onPause}, which is always called when an activity is being placed 1168 * in the background or on its way to destruction, or {@link #onStop} which 1169 * is called before destruction. One example of when {@link #onPause} and 1170 * {@link #onStop} is called and not this method is when a user navigates back 1171 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1172 * on B because that particular instance will never be restored, so the 1173 * system avoids calling it. An example when {@link #onPause} is called and 1174 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1175 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1176 * killed during the lifetime of B since the state of the user interface of 1177 * A will stay intact. 1178 * 1179 * <p>The default implementation takes care of most of the UI per-instance 1180 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1181 * view in the hierarchy that has an id, and by saving the id of the currently 1182 * focused view (all of which is restored by the default implementation of 1183 * {@link #onRestoreInstanceState}). If you override this method to save additional 1184 * information not captured by each individual view, you will likely want to 1185 * call through to the default implementation, otherwise be prepared to save 1186 * all of the state of each view yourself. 1187 * 1188 * <p>If called, this method will occur before {@link #onStop}. There are 1189 * no guarantees about whether it will occur before or after {@link #onPause}. 1190 * 1191 * @param outState Bundle in which to place your saved state. 1192 * 1193 * @see #onCreate 1194 * @see #onRestoreInstanceState 1195 * @see #onPause 1196 */ 1197 protected void onSaveInstanceState(Bundle outState) { 1198 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1199 Parcelable p = mFragments.saveAllState(); 1200 if (p != null) { 1201 outState.putParcelable(FRAGMENTS_TAG, p); 1202 } 1203 getApplication().dispatchActivitySaveInstanceState(this, outState); 1204 } 1205 1206 /** 1207 * Save the state of any managed dialogs. 1208 * 1209 * @param outState place to store the saved state. 1210 */ 1211 private void saveManagedDialogs(Bundle outState) { 1212 if (mManagedDialogs == null) { 1213 return; 1214 } 1215 1216 final int numDialogs = mManagedDialogs.size(); 1217 if (numDialogs == 0) { 1218 return; 1219 } 1220 1221 Bundle dialogState = new Bundle(); 1222 1223 int[] ids = new int[mManagedDialogs.size()]; 1224 1225 // save each dialog's bundle, gather the ids 1226 for (int i = 0; i < numDialogs; i++) { 1227 final int key = mManagedDialogs.keyAt(i); 1228 ids[i] = key; 1229 final ManagedDialog md = mManagedDialogs.valueAt(i); 1230 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1231 if (md.mArgs != null) { 1232 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1233 } 1234 } 1235 1236 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1237 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1238 } 1239 1240 1241 /** 1242 * Called as part of the activity lifecycle when an activity is going into 1243 * the background, but has not (yet) been killed. The counterpart to 1244 * {@link #onResume}. 1245 * 1246 * <p>When activity B is launched in front of activity A, this callback will 1247 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1248 * so be sure to not do anything lengthy here. 1249 * 1250 * <p>This callback is mostly used for saving any persistent state the 1251 * activity is editing, to present a "edit in place" model to the user and 1252 * making sure nothing is lost if there are not enough resources to start 1253 * the new activity without first killing this one. This is also a good 1254 * place to do things like stop animations and other things that consume a 1255 * noticeable amount of CPU in order to make the switch to the next activity 1256 * as fast as possible, or to close resources that are exclusive access 1257 * such as the camera. 1258 * 1259 * <p>In situations where the system needs more memory it may kill paused 1260 * processes to reclaim resources. Because of this, you should be sure 1261 * that all of your state is saved by the time you return from 1262 * this function. In general {@link #onSaveInstanceState} is used to save 1263 * per-instance state in the activity and this method is used to store 1264 * global persistent data (in content providers, files, etc.) 1265 * 1266 * <p>After receiving this call you will usually receive a following call 1267 * to {@link #onStop} (after the next activity has been resumed and 1268 * displayed), however in some cases there will be a direct call back to 1269 * {@link #onResume} without going through the stopped state. 1270 * 1271 * <p><em>Derived classes must call through to the super class's 1272 * implementation of this method. If they do not, an exception will be 1273 * thrown.</em></p> 1274 * 1275 * @see #onResume 1276 * @see #onSaveInstanceState 1277 * @see #onStop 1278 */ 1279 protected void onPause() { 1280 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this); 1281 getApplication().dispatchActivityPaused(this); 1282 mCalled = true; 1283 } 1284 1285 /** 1286 * Called as part of the activity lifecycle when an activity is about to go 1287 * into the background as the result of user choice. For example, when the 1288 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1289 * when an incoming phone call causes the in-call Activity to be automatically 1290 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1291 * the activity being interrupted. In cases when it is invoked, this method 1292 * is called right before the activity's {@link #onPause} callback. 1293 * 1294 * <p>This callback and {@link #onUserInteraction} are intended to help 1295 * activities manage status bar notifications intelligently; specifically, 1296 * for helping activities determine the proper time to cancel a notfication. 1297 * 1298 * @see #onUserInteraction() 1299 */ 1300 protected void onUserLeaveHint() { 1301 } 1302 1303 /** 1304 * Generate a new thumbnail for this activity. This method is called before 1305 * pausing the activity, and should draw into <var>outBitmap</var> the 1306 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1307 * can use the given <var>canvas</var>, which is configured to draw into the 1308 * bitmap, for rendering if desired. 1309 * 1310 * <p>The default implementation returns fails and does not draw a thumbnail; 1311 * this will result in the platform creating its own thumbnail if needed. 1312 * 1313 * @param outBitmap The bitmap to contain the thumbnail. 1314 * @param canvas Can be used to render into the bitmap. 1315 * 1316 * @return Return true if you have drawn into the bitmap; otherwise after 1317 * you return it will be filled with a default thumbnail. 1318 * 1319 * @see #onCreateDescription 1320 * @see #onSaveInstanceState 1321 * @see #onPause 1322 */ 1323 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1324 return false; 1325 } 1326 1327 /** 1328 * Generate a new description for this activity. This method is called 1329 * before pausing the activity and can, if desired, return some textual 1330 * description of its current state to be displayed to the user. 1331 * 1332 * <p>The default implementation returns null, which will cause you to 1333 * inherit the description from the previous activity. If all activities 1334 * return null, generally the label of the top activity will be used as the 1335 * description. 1336 * 1337 * @return A description of what the user is doing. It should be short and 1338 * sweet (only a few words). 1339 * 1340 * @see #onCreateThumbnail 1341 * @see #onSaveInstanceState 1342 * @see #onPause 1343 */ 1344 public CharSequence onCreateDescription() { 1345 return null; 1346 } 1347 1348 /** 1349 * This is called when the user is requesting an assist, to build a full 1350 * {@link Intent#ACTION_ASSIST} Intent with all of the context of the current 1351 * application. You can override this method to place into the bundle anything 1352 * you would like to appear in the {@link Intent#EXTRA_ASSIST_CONTEXT} part 1353 * of the assist Intent. The default implementation does nothing. 1354 * 1355 * <p>This function will be called after any global assist callbacks that had 1356 * been registered with {@link Application#registerOnProvideAssistData 1357 * Application.registerOnProvideAssistData}. 1358 */ 1359 public void onProvideAssistData(Bundle data) { 1360 } 1361 1362 /** 1363 * Called when you are no longer visible to the user. You will next 1364 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1365 * depending on later user activity. 1366 * 1367 * <p>Note that this method may never be called, in low memory situations 1368 * where the system does not have enough memory to keep your activity's 1369 * process running after its {@link #onPause} method is called. 1370 * 1371 * <p><em>Derived classes must call through to the super class's 1372 * implementation of this method. If they do not, an exception will be 1373 * thrown.</em></p> 1374 * 1375 * @see #onRestart 1376 * @see #onResume 1377 * @see #onSaveInstanceState 1378 * @see #onDestroy 1379 */ 1380 protected void onStop() { 1381 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStop " + this); 1382 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1383 getApplication().dispatchActivityStopped(this); 1384 mCalled = true; 1385 } 1386 1387 /** 1388 * Perform any final cleanup before an activity is destroyed. This can 1389 * happen either because the activity is finishing (someone called 1390 * {@link #finish} on it, or because the system is temporarily destroying 1391 * this instance of the activity to save space. You can distinguish 1392 * between these two scenarios with the {@link #isFinishing} method. 1393 * 1394 * <p><em>Note: do not count on this method being called as a place for 1395 * saving data! For example, if an activity is editing data in a content 1396 * provider, those edits should be committed in either {@link #onPause} or 1397 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1398 * free resources like threads that are associated with an activity, so 1399 * that a destroyed activity does not leave such things around while the 1400 * rest of its application is still running. There are situations where 1401 * the system will simply kill the activity's hosting process without 1402 * calling this method (or any others) in it, so it should not be used to 1403 * do things that are intended to remain around after the process goes 1404 * away. 1405 * 1406 * <p><em>Derived classes must call through to the super class's 1407 * implementation of this method. If they do not, an exception will be 1408 * thrown.</em></p> 1409 * 1410 * @see #onPause 1411 * @see #onStop 1412 * @see #finish 1413 * @see #isFinishing 1414 */ 1415 protected void onDestroy() { 1416 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onDestroy " + this); 1417 mCalled = true; 1418 1419 // dismiss any dialogs we are managing. 1420 if (mManagedDialogs != null) { 1421 final int numDialogs = mManagedDialogs.size(); 1422 for (int i = 0; i < numDialogs; i++) { 1423 final ManagedDialog md = mManagedDialogs.valueAt(i); 1424 if (md.mDialog.isShowing()) { 1425 md.mDialog.dismiss(); 1426 } 1427 } 1428 mManagedDialogs = null; 1429 } 1430 1431 // close any cursors we are managing. 1432 synchronized (mManagedCursors) { 1433 int numCursors = mManagedCursors.size(); 1434 for (int i = 0; i < numCursors; i++) { 1435 ManagedCursor c = mManagedCursors.get(i); 1436 if (c != null) { 1437 c.mCursor.close(); 1438 } 1439 } 1440 mManagedCursors.clear(); 1441 } 1442 1443 // Close any open search dialog 1444 if (mSearchManager != null) { 1445 mSearchManager.stopSearch(); 1446 } 1447 1448 getApplication().dispatchActivityDestroyed(this); 1449 } 1450 1451 /** 1452 * Called by the system when the device configuration changes while your 1453 * activity is running. Note that this will <em>only</em> be called if 1454 * you have selected configurations you would like to handle with the 1455 * {@link android.R.attr#configChanges} attribute in your manifest. If 1456 * any configuration change occurs that is not selected to be reported 1457 * by that attribute, then instead of reporting it the system will stop 1458 * and restart the activity (to have it launched with the new 1459 * configuration). 1460 * 1461 * <p>At the time that this function has been called, your Resources 1462 * object will have been updated to return resource values matching the 1463 * new configuration. 1464 * 1465 * @param newConfig The new device configuration. 1466 */ 1467 public void onConfigurationChanged(Configuration newConfig) { 1468 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig); 1469 mCalled = true; 1470 1471 mFragments.dispatchConfigurationChanged(newConfig); 1472 1473 if (mWindow != null) { 1474 // Pass the configuration changed event to the window 1475 mWindow.onConfigurationChanged(newConfig); 1476 } 1477 1478 if (mActionBar != null) { 1479 // Do this last; the action bar will need to access 1480 // view changes from above. 1481 mActionBar.onConfigurationChanged(newConfig); 1482 } 1483 } 1484 1485 /** 1486 * If this activity is being destroyed because it can not handle a 1487 * configuration parameter being changed (and thus its 1488 * {@link #onConfigurationChanged(Configuration)} method is 1489 * <em>not</em> being called), then you can use this method to discover 1490 * the set of changes that have occurred while in the process of being 1491 * destroyed. Note that there is no guarantee that these will be 1492 * accurate (other changes could have happened at any time), so you should 1493 * only use this as an optimization hint. 1494 * 1495 * @return Returns a bit field of the configuration parameters that are 1496 * changing, as defined by the {@link android.content.res.Configuration} 1497 * class. 1498 */ 1499 public int getChangingConfigurations() { 1500 return mConfigChangeFlags; 1501 } 1502 1503 /** 1504 * Retrieve the non-configuration instance data that was previously 1505 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1506 * be available from the initial {@link #onCreate} and 1507 * {@link #onStart} calls to the new instance, allowing you to extract 1508 * any useful dynamic state from the previous instance. 1509 * 1510 * <p>Note that the data you retrieve here should <em>only</em> be used 1511 * as an optimization for handling configuration changes. You should always 1512 * be able to handle getting a null pointer back, and an activity must 1513 * still be able to restore itself to its previous state (through the 1514 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1515 * function returns null. 1516 * 1517 * @return Returns the object previously returned by 1518 * {@link #onRetainNonConfigurationInstance()}. 1519 * 1520 * @deprecated Use the new {@link Fragment} API 1521 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1522 * available on older platforms through the Android compatibility package. 1523 */ 1524 @Deprecated 1525 public Object getLastNonConfigurationInstance() { 1526 return mLastNonConfigurationInstances != null 1527 ? mLastNonConfigurationInstances.activity : null; 1528 } 1529 1530 /** 1531 * Called by the system, as part of destroying an 1532 * activity due to a configuration change, when it is known that a new 1533 * instance will immediately be created for the new configuration. You 1534 * can return any object you like here, including the activity instance 1535 * itself, which can later be retrieved by calling 1536 * {@link #getLastNonConfigurationInstance()} in the new activity 1537 * instance. 1538 * 1539 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1540 * or later, consider instead using a {@link Fragment} with 1541 * {@link Fragment#setRetainInstance(boolean) 1542 * Fragment.setRetainInstance(boolean}.</em> 1543 * 1544 * <p>This function is called purely as an optimization, and you must 1545 * not rely on it being called. When it is called, a number of guarantees 1546 * will be made to help optimize configuration switching: 1547 * <ul> 1548 * <li> The function will be called between {@link #onStop} and 1549 * {@link #onDestroy}. 1550 * <li> A new instance of the activity will <em>always</em> be immediately 1551 * created after this one's {@link #onDestroy()} is called. In particular, 1552 * <em>no</em> messages will be dispatched during this time (when the returned 1553 * object does not have an activity to be associated with). 1554 * <li> The object you return here will <em>always</em> be available from 1555 * the {@link #getLastNonConfigurationInstance()} method of the following 1556 * activity instance as described there. 1557 * </ul> 1558 * 1559 * <p>These guarantees are designed so that an activity can use this API 1560 * to propagate extensive state from the old to new activity instance, from 1561 * loaded bitmaps, to network connections, to evenly actively running 1562 * threads. Note that you should <em>not</em> propagate any data that 1563 * may change based on the configuration, including any data loaded from 1564 * resources such as strings, layouts, or drawables. 1565 * 1566 * <p>The guarantee of no message handling during the switch to the next 1567 * activity simplifies use with active objects. For example if your retained 1568 * state is an {@link android.os.AsyncTask} you are guaranteed that its 1569 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 1570 * not be called from the call here until you execute the next instance's 1571 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 1572 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 1573 * running in a separate thread.) 1574 * 1575 * @return Return any Object holding the desired state to propagate to the 1576 * next activity instance. 1577 * 1578 * @deprecated Use the new {@link Fragment} API 1579 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1580 * available on older platforms through the Android compatibility package. 1581 */ 1582 public Object onRetainNonConfigurationInstance() { 1583 return null; 1584 } 1585 1586 /** 1587 * Retrieve the non-configuration instance data that was previously 1588 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1589 * be available from the initial {@link #onCreate} and 1590 * {@link #onStart} calls to the new instance, allowing you to extract 1591 * any useful dynamic state from the previous instance. 1592 * 1593 * <p>Note that the data you retrieve here should <em>only</em> be used 1594 * as an optimization for handling configuration changes. You should always 1595 * be able to handle getting a null pointer back, and an activity must 1596 * still be able to restore itself to its previous state (through the 1597 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1598 * function returns null. 1599 * 1600 * @return Returns the object previously returned by 1601 * {@link #onRetainNonConfigurationChildInstances()} 1602 */ 1603 HashMap<String, Object> getLastNonConfigurationChildInstances() { 1604 return mLastNonConfigurationInstances != null 1605 ? mLastNonConfigurationInstances.children : null; 1606 } 1607 1608 /** 1609 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1610 * it should return either a mapping from child activity id strings to arbitrary objects, 1611 * or null. This method is intended to be used by Activity framework subclasses that control a 1612 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1613 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1614 */ 1615 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1616 return null; 1617 } 1618 1619 NonConfigurationInstances retainNonConfigurationInstances() { 1620 Object activity = onRetainNonConfigurationInstance(); 1621 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 1622 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 1623 boolean retainLoaders = false; 1624 if (mAllLoaderManagers != null) { 1625 // prune out any loader managers that were already stopped and so 1626 // have nothing useful to retain. 1627 LoaderManagerImpl loaders[] = new LoaderManagerImpl[mAllLoaderManagers.size()]; 1628 mAllLoaderManagers.values().toArray(loaders); 1629 if (loaders != null) { 1630 for (int i=0; i<loaders.length; i++) { 1631 LoaderManagerImpl lm = loaders[i]; 1632 if (lm.mRetaining) { 1633 retainLoaders = true; 1634 } else { 1635 lm.doDestroy(); 1636 mAllLoaderManagers.remove(lm.mWho); 1637 } 1638 } 1639 } 1640 } 1641 if (activity == null && children == null && fragments == null && !retainLoaders) { 1642 return null; 1643 } 1644 1645 NonConfigurationInstances nci = new NonConfigurationInstances(); 1646 nci.activity = activity; 1647 nci.children = children; 1648 nci.fragments = fragments; 1649 nci.loaders = mAllLoaderManagers; 1650 return nci; 1651 } 1652 1653 public void onLowMemory() { 1654 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onLowMemory " + this); 1655 mCalled = true; 1656 mFragments.dispatchLowMemory(); 1657 } 1658 1659 public void onTrimMemory(int level) { 1660 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onTrimMemory " + this + ": " + level); 1661 mCalled = true; 1662 mFragments.dispatchTrimMemory(level); 1663 } 1664 1665 /** 1666 * Return the FragmentManager for interacting with fragments associated 1667 * with this activity. 1668 */ 1669 public FragmentManager getFragmentManager() { 1670 return mFragments; 1671 } 1672 1673 void invalidateFragment(String who) { 1674 //Log.v(TAG, "invalidateFragmentIndex: index=" + index); 1675 if (mAllLoaderManagers != null) { 1676 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 1677 if (lm != null && !lm.mRetaining) { 1678 lm.doDestroy(); 1679 mAllLoaderManagers.remove(who); 1680 } 1681 } 1682 } 1683 1684 /** 1685 * Called when a Fragment is being attached to this activity, immediately 1686 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 1687 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 1688 */ 1689 public void onAttachFragment(Fragment fragment) { 1690 } 1691 1692 /** 1693 * Wrapper around 1694 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1695 * that gives the resulting {@link Cursor} to call 1696 * {@link #startManagingCursor} so that the activity will manage its 1697 * lifecycle for you. 1698 * 1699 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1700 * or later, consider instead using {@link LoaderManager} instead, available 1701 * via {@link #getLoaderManager()}.</em> 1702 * 1703 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1704 * this method, because the activity will do that for you at the appropriate time. However, if 1705 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1706 * not</em> automatically close the cursor and, in that case, you must call 1707 * {@link Cursor#close()}.</p> 1708 * 1709 * @param uri The URI of the content provider to query. 1710 * @param projection List of columns to return. 1711 * @param selection SQL WHERE clause. 1712 * @param sortOrder SQL ORDER BY clause. 1713 * 1714 * @return The Cursor that was returned by query(). 1715 * 1716 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1717 * @see #startManagingCursor 1718 * @hide 1719 * 1720 * @deprecated Use {@link CursorLoader} instead. 1721 */ 1722 @Deprecated 1723 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1724 String sortOrder) { 1725 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1726 if (c != null) { 1727 startManagingCursor(c); 1728 } 1729 return c; 1730 } 1731 1732 /** 1733 * Wrapper around 1734 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1735 * that gives the resulting {@link Cursor} to call 1736 * {@link #startManagingCursor} so that the activity will manage its 1737 * lifecycle for you. 1738 * 1739 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1740 * or later, consider instead using {@link LoaderManager} instead, available 1741 * via {@link #getLoaderManager()}.</em> 1742 * 1743 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1744 * this method, because the activity will do that for you at the appropriate time. However, if 1745 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1746 * not</em> automatically close the cursor and, in that case, you must call 1747 * {@link Cursor#close()}.</p> 1748 * 1749 * @param uri The URI of the content provider to query. 1750 * @param projection List of columns to return. 1751 * @param selection SQL WHERE clause. 1752 * @param selectionArgs The arguments to selection, if any ?s are pesent 1753 * @param sortOrder SQL ORDER BY clause. 1754 * 1755 * @return The Cursor that was returned by query(). 1756 * 1757 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1758 * @see #startManagingCursor 1759 * 1760 * @deprecated Use {@link CursorLoader} instead. 1761 */ 1762 @Deprecated 1763 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1764 String[] selectionArgs, String sortOrder) { 1765 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1766 if (c != null) { 1767 startManagingCursor(c); 1768 } 1769 return c; 1770 } 1771 1772 /** 1773 * This method allows the activity to take care of managing the given 1774 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1775 * That is, when the activity is stopped it will automatically call 1776 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1777 * it will call {@link Cursor#requery} for you. When the activity is 1778 * destroyed, all managed Cursors will be closed automatically. 1779 * 1780 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1781 * or later, consider instead using {@link LoaderManager} instead, available 1782 * via {@link #getLoaderManager()}.</em> 1783 * 1784 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 1785 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 1786 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 1787 * <em>will not</em> automatically close the cursor and, in that case, you must call 1788 * {@link Cursor#close()}.</p> 1789 * 1790 * @param c The Cursor to be managed. 1791 * 1792 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1793 * @see #stopManagingCursor 1794 * 1795 * @deprecated Use the new {@link android.content.CursorLoader} class with 1796 * {@link LoaderManager} instead; this is also 1797 * available on older platforms through the Android compatibility package. 1798 */ 1799 @Deprecated 1800 public void startManagingCursor(Cursor c) { 1801 synchronized (mManagedCursors) { 1802 mManagedCursors.add(new ManagedCursor(c)); 1803 } 1804 } 1805 1806 /** 1807 * Given a Cursor that was previously given to 1808 * {@link #startManagingCursor}, stop the activity's management of that 1809 * cursor. 1810 * 1811 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 1812 * the system <em>will not</em> automatically close the cursor and you must call 1813 * {@link Cursor#close()}.</p> 1814 * 1815 * @param c The Cursor that was being managed. 1816 * 1817 * @see #startManagingCursor 1818 * 1819 * @deprecated Use the new {@link android.content.CursorLoader} class with 1820 * {@link LoaderManager} instead; this is also 1821 * available on older platforms through the Android compatibility package. 1822 */ 1823 @Deprecated 1824 public void stopManagingCursor(Cursor c) { 1825 synchronized (mManagedCursors) { 1826 final int N = mManagedCursors.size(); 1827 for (int i=0; i<N; i++) { 1828 ManagedCursor mc = mManagedCursors.get(i); 1829 if (mc.mCursor == c) { 1830 mManagedCursors.remove(i); 1831 break; 1832 } 1833 } 1834 } 1835 } 1836 1837 /** 1838 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 1839 * this is a no-op. 1840 * @hide 1841 */ 1842 @Deprecated 1843 public void setPersistent(boolean isPersistent) { 1844 } 1845 1846 /** 1847 * Finds a view that was identified by the id attribute from the XML that 1848 * was processed in {@link #onCreate}. 1849 * 1850 * @return The view if found or null otherwise. 1851 */ 1852 public View findViewById(int id) { 1853 return getWindow().findViewById(id); 1854 } 1855 1856 /** 1857 * Retrieve a reference to this activity's ActionBar. 1858 * 1859 * @return The Activity's ActionBar, or null if it does not have one. 1860 */ 1861 public ActionBar getActionBar() { 1862 initActionBar(); 1863 return mActionBar; 1864 } 1865 1866 /** 1867 * Creates a new ActionBar, locates the inflated ActionBarView, 1868 * initializes the ActionBar with the view, and sets mActionBar. 1869 */ 1870 private void initActionBar() { 1871 Window window = getWindow(); 1872 1873 // Initializing the window decor can change window feature flags. 1874 // Make sure that we have the correct set before performing the test below. 1875 window.getDecorView(); 1876 1877 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 1878 return; 1879 } 1880 1881 mActionBar = new ActionBarImpl(this); 1882 mActionBar.setDefaultDisplayHomeAsUpEnabled(mEnableDefaultActionBarUp); 1883 } 1884 1885 /** 1886 * Set the activity content from a layout resource. The resource will be 1887 * inflated, adding all top-level views to the activity. 1888 * 1889 * @param layoutResID Resource ID to be inflated. 1890 * 1891 * @see #setContentView(android.view.View) 1892 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1893 */ 1894 public void setContentView(int layoutResID) { 1895 getWindow().setContentView(layoutResID); 1896 initActionBar(); 1897 } 1898 1899 /** 1900 * Set the activity content to an explicit view. This view is placed 1901 * directly into the activity's view hierarchy. It can itself be a complex 1902 * view hierarchy. When calling this method, the layout parameters of the 1903 * specified view are ignored. Both the width and the height of the view are 1904 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 1905 * your own layout parameters, invoke 1906 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 1907 * instead. 1908 * 1909 * @param view The desired content to display. 1910 * 1911 * @see #setContentView(int) 1912 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1913 */ 1914 public void setContentView(View view) { 1915 getWindow().setContentView(view); 1916 initActionBar(); 1917 } 1918 1919 /** 1920 * Set the activity content to an explicit view. This view is placed 1921 * directly into the activity's view hierarchy. It can itself be a complex 1922 * view hierarchy. 1923 * 1924 * @param view The desired content to display. 1925 * @param params Layout parameters for the view. 1926 * 1927 * @see #setContentView(android.view.View) 1928 * @see #setContentView(int) 1929 */ 1930 public void setContentView(View view, ViewGroup.LayoutParams params) { 1931 getWindow().setContentView(view, params); 1932 initActionBar(); 1933 } 1934 1935 /** 1936 * Add an additional content view to the activity. Added after any existing 1937 * ones in the activity -- existing views are NOT removed. 1938 * 1939 * @param view The desired content to display. 1940 * @param params Layout parameters for the view. 1941 */ 1942 public void addContentView(View view, ViewGroup.LayoutParams params) { 1943 getWindow().addContentView(view, params); 1944 initActionBar(); 1945 } 1946 1947 /** 1948 * Sets whether this activity is finished when touched outside its window's 1949 * bounds. 1950 */ 1951 public void setFinishOnTouchOutside(boolean finish) { 1952 mWindow.setCloseOnTouchOutside(finish); 1953 } 1954 1955 /** 1956 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1957 * keys. 1958 * 1959 * @see #setDefaultKeyMode 1960 */ 1961 static public final int DEFAULT_KEYS_DISABLE = 0; 1962 /** 1963 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1964 * key handling. 1965 * 1966 * @see #setDefaultKeyMode 1967 */ 1968 static public final int DEFAULT_KEYS_DIALER = 1; 1969 /** 1970 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1971 * default key handling. 1972 * 1973 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1974 * 1975 * @see #setDefaultKeyMode 1976 */ 1977 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1978 /** 1979 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1980 * will start an application-defined search. (If the application or activity does not 1981 * actually define a search, the the keys will be ignored.) 1982 * 1983 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1984 * 1985 * @see #setDefaultKeyMode 1986 */ 1987 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1988 1989 /** 1990 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1991 * will start a global search (typically web search, but some platforms may define alternate 1992 * methods for global search) 1993 * 1994 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1995 * 1996 * @see #setDefaultKeyMode 1997 */ 1998 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1999 2000 /** 2001 * Select the default key handling for this activity. This controls what 2002 * will happen to key events that are not otherwise handled. The default 2003 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 2004 * floor. Other modes allow you to launch the dialer 2005 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 2006 * menu without requiring the menu key be held down 2007 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 2008 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 2009 * 2010 * <p>Note that the mode selected here does not impact the default 2011 * handling of system keys, such as the "back" and "menu" keys, and your 2012 * activity and its views always get a first chance to receive and handle 2013 * all application keys. 2014 * 2015 * @param mode The desired default key mode constant. 2016 * 2017 * @see #DEFAULT_KEYS_DISABLE 2018 * @see #DEFAULT_KEYS_DIALER 2019 * @see #DEFAULT_KEYS_SHORTCUT 2020 * @see #DEFAULT_KEYS_SEARCH_LOCAL 2021 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 2022 * @see #onKeyDown 2023 */ 2024 public final void setDefaultKeyMode(int mode) { 2025 mDefaultKeyMode = mode; 2026 2027 // Some modes use a SpannableStringBuilder to track & dispatch input events 2028 // This list must remain in sync with the switch in onKeyDown() 2029 switch (mode) { 2030 case DEFAULT_KEYS_DISABLE: 2031 case DEFAULT_KEYS_SHORTCUT: 2032 mDefaultKeySsb = null; // not used in these modes 2033 break; 2034 case DEFAULT_KEYS_DIALER: 2035 case DEFAULT_KEYS_SEARCH_LOCAL: 2036 case DEFAULT_KEYS_SEARCH_GLOBAL: 2037 mDefaultKeySsb = new SpannableStringBuilder(); 2038 Selection.setSelection(mDefaultKeySsb,0); 2039 break; 2040 default: 2041 throw new IllegalArgumentException(); 2042 } 2043 } 2044 2045 /** 2046 * Called when a key was pressed down and not handled by any of the views 2047 * inside of the activity. So, for example, key presses while the cursor 2048 * is inside a TextView will not trigger the event (unless it is a navigation 2049 * to another object) because TextView handles its own key presses. 2050 * 2051 * <p>If the focused view didn't want this event, this method is called. 2052 * 2053 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2054 * by calling {@link #onBackPressed()}, though the behavior varies based 2055 * on the application compatibility mode: for 2056 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2057 * it will set up the dispatch to call {@link #onKeyUp} where the action 2058 * will be performed; for earlier applications, it will perform the 2059 * action immediately in on-down, as those versions of the platform 2060 * behaved. 2061 * 2062 * <p>Other additional default key handling may be performed 2063 * if configured with {@link #setDefaultKeyMode}. 2064 * 2065 * @return Return <code>true</code> to prevent this event from being propagated 2066 * further, or <code>false</code> to indicate that you have not handled 2067 * this event and it should continue to be propagated. 2068 * @see #onKeyUp 2069 * @see android.view.KeyEvent 2070 */ 2071 public boolean onKeyDown(int keyCode, KeyEvent event) { 2072 if (keyCode == KeyEvent.KEYCODE_BACK) { 2073 if (getApplicationInfo().targetSdkVersion 2074 >= Build.VERSION_CODES.ECLAIR) { 2075 event.startTracking(); 2076 } else { 2077 onBackPressed(); 2078 } 2079 return true; 2080 } 2081 2082 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2083 return false; 2084 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2085 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 2086 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2087 return true; 2088 } 2089 return false; 2090 } else { 2091 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2092 boolean clearSpannable = false; 2093 boolean handled; 2094 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2095 clearSpannable = true; 2096 handled = false; 2097 } else { 2098 handled = TextKeyListener.getInstance().onKeyDown( 2099 null, mDefaultKeySsb, keyCode, event); 2100 if (handled && mDefaultKeySsb.length() > 0) { 2101 // something useable has been typed - dispatch it now. 2102 2103 final String str = mDefaultKeySsb.toString(); 2104 clearSpannable = true; 2105 2106 switch (mDefaultKeyMode) { 2107 case DEFAULT_KEYS_DIALER: 2108 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2109 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2110 startActivity(intent); 2111 break; 2112 case DEFAULT_KEYS_SEARCH_LOCAL: 2113 startSearch(str, false, null, false); 2114 break; 2115 case DEFAULT_KEYS_SEARCH_GLOBAL: 2116 startSearch(str, false, null, true); 2117 break; 2118 } 2119 } 2120 } 2121 if (clearSpannable) { 2122 mDefaultKeySsb.clear(); 2123 mDefaultKeySsb.clearSpans(); 2124 Selection.setSelection(mDefaultKeySsb,0); 2125 } 2126 return handled; 2127 } 2128 } 2129 2130 /** 2131 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2132 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2133 * the event). 2134 */ 2135 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2136 return false; 2137 } 2138 2139 /** 2140 * Called when a key was released and not handled by any of the views 2141 * inside of the activity. So, for example, key presses while the cursor 2142 * is inside a TextView will not trigger the event (unless it is a navigation 2143 * to another object) because TextView handles its own key presses. 2144 * 2145 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2146 * and go back. 2147 * 2148 * @return Return <code>true</code> to prevent this event from being propagated 2149 * further, or <code>false</code> to indicate that you have not handled 2150 * this event and it should continue to be propagated. 2151 * @see #onKeyDown 2152 * @see KeyEvent 2153 */ 2154 public boolean onKeyUp(int keyCode, KeyEvent event) { 2155 if (getApplicationInfo().targetSdkVersion 2156 >= Build.VERSION_CODES.ECLAIR) { 2157 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2158 && !event.isCanceled()) { 2159 onBackPressed(); 2160 return true; 2161 } 2162 } 2163 return false; 2164 } 2165 2166 /** 2167 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2168 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2169 * the event). 2170 */ 2171 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2172 return false; 2173 } 2174 2175 /** 2176 * Called when the activity has detected the user's press of the back 2177 * key. The default implementation simply finishes the current activity, 2178 * but you can override this to do whatever you want. 2179 */ 2180 public void onBackPressed() { 2181 if (!mFragments.popBackStackImmediate()) { 2182 finish(); 2183 } 2184 } 2185 2186 /** 2187 * Called when a key shortcut event is not handled by any of the views in the Activity. 2188 * Override this method to implement global key shortcuts for the Activity. 2189 * Key shortcuts can also be implemented by setting the 2190 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2191 * 2192 * @param keyCode The value in event.getKeyCode(). 2193 * @param event Description of the key event. 2194 * @return True if the key shortcut was handled. 2195 */ 2196 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2197 return false; 2198 } 2199 2200 /** 2201 * Called when a touch screen event was not handled by any of the views 2202 * under it. This is most useful to process touch events that happen 2203 * outside of your window bounds, where there is no view to receive it. 2204 * 2205 * @param event The touch screen event being processed. 2206 * 2207 * @return Return true if you have consumed the event, false if you haven't. 2208 * The default implementation always returns false. 2209 */ 2210 public boolean onTouchEvent(MotionEvent event) { 2211 if (mWindow.shouldCloseOnTouch(this, event)) { 2212 finish(); 2213 return true; 2214 } 2215 2216 return false; 2217 } 2218 2219 /** 2220 * Called when the trackball was moved and not handled by any of the 2221 * views inside of the activity. So, for example, if the trackball moves 2222 * while focus is on a button, you will receive a call here because 2223 * buttons do not normally do anything with trackball events. The call 2224 * here happens <em>before</em> trackball movements are converted to 2225 * DPAD key events, which then get sent back to the view hierarchy, and 2226 * will be processed at the point for things like focus navigation. 2227 * 2228 * @param event The trackball event being processed. 2229 * 2230 * @return Return true if you have consumed the event, false if you haven't. 2231 * The default implementation always returns false. 2232 */ 2233 public boolean onTrackballEvent(MotionEvent event) { 2234 return false; 2235 } 2236 2237 /** 2238 * Called when a generic motion event was not handled by any of the 2239 * views inside of the activity. 2240 * <p> 2241 * Generic motion events describe joystick movements, mouse hovers, track pad 2242 * touches, scroll wheel movements and other input events. The 2243 * {@link MotionEvent#getSource() source} of the motion event specifies 2244 * the class of input that was received. Implementations of this method 2245 * must examine the bits in the source before processing the event. 2246 * The following code example shows how this is done. 2247 * </p><p> 2248 * Generic motion events with source class 2249 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2250 * are delivered to the view under the pointer. All other generic motion events are 2251 * delivered to the focused view. 2252 * </p><p> 2253 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2254 * handle this event. 2255 * </p> 2256 * 2257 * @param event The generic motion event being processed. 2258 * 2259 * @return Return true if you have consumed the event, false if you haven't. 2260 * The default implementation always returns false. 2261 */ 2262 public boolean onGenericMotionEvent(MotionEvent event) { 2263 return false; 2264 } 2265 2266 /** 2267 * Called whenever a key, touch, or trackball event is dispatched to the 2268 * activity. Implement this method if you wish to know that the user has 2269 * interacted with the device in some way while your activity is running. 2270 * This callback and {@link #onUserLeaveHint} are intended to help 2271 * activities manage status bar notifications intelligently; specifically, 2272 * for helping activities determine the proper time to cancel a notfication. 2273 * 2274 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2275 * be accompanied by calls to {@link #onUserInteraction}. This 2276 * ensures that your activity will be told of relevant user activity such 2277 * as pulling down the notification pane and touching an item there. 2278 * 2279 * <p>Note that this callback will be invoked for the touch down action 2280 * that begins a touch gesture, but may not be invoked for the touch-moved 2281 * and touch-up actions that follow. 2282 * 2283 * @see #onUserLeaveHint() 2284 */ 2285 public void onUserInteraction() { 2286 } 2287 2288 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2289 // Update window manager if: we have a view, that view is 2290 // attached to its parent (which will be a RootView), and 2291 // this activity is not embedded. 2292 if (mParent == null) { 2293 View decor = mDecor; 2294 if (decor != null && decor.getParent() != null) { 2295 getWindowManager().updateViewLayout(decor, params); 2296 } 2297 } 2298 } 2299 2300 public void onContentChanged() { 2301 } 2302 2303 /** 2304 * Called when the current {@link Window} of the activity gains or loses 2305 * focus. This is the best indicator of whether this activity is visible 2306 * to the user. The default implementation clears the key tracking 2307 * state, so should always be called. 2308 * 2309 * <p>Note that this provides information about global focus state, which 2310 * is managed independently of activity lifecycles. As such, while focus 2311 * changes will generally have some relation to lifecycle changes (an 2312 * activity that is stopped will not generally get window focus), you 2313 * should not rely on any particular order between the callbacks here and 2314 * those in the other lifecycle methods such as {@link #onResume}. 2315 * 2316 * <p>As a general rule, however, a resumed activity will have window 2317 * focus... unless it has displayed other dialogs or popups that take 2318 * input focus, in which case the activity itself will not have focus 2319 * when the other windows have it. Likewise, the system may display 2320 * system-level windows (such as the status bar notification panel or 2321 * a system alert) which will temporarily take window input focus without 2322 * pausing the foreground activity. 2323 * 2324 * @param hasFocus Whether the window of this activity has focus. 2325 * 2326 * @see #hasWindowFocus() 2327 * @see #onResume 2328 * @see View#onWindowFocusChanged(boolean) 2329 */ 2330 public void onWindowFocusChanged(boolean hasFocus) { 2331 } 2332 2333 /** 2334 * Called when the main window associated with the activity has been 2335 * attached to the window manager. 2336 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2337 * for more information. 2338 * @see View#onAttachedToWindow 2339 */ 2340 public void onAttachedToWindow() { 2341 } 2342 2343 /** 2344 * Called when the main window associated with the activity has been 2345 * detached from the window manager. 2346 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2347 * for more information. 2348 * @see View#onDetachedFromWindow 2349 */ 2350 public void onDetachedFromWindow() { 2351 } 2352 2353 /** 2354 * Returns true if this activity's <em>main</em> window currently has window focus. 2355 * Note that this is not the same as the view itself having focus. 2356 * 2357 * @return True if this activity's main window currently has window focus. 2358 * 2359 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2360 */ 2361 public boolean hasWindowFocus() { 2362 Window w = getWindow(); 2363 if (w != null) { 2364 View d = w.getDecorView(); 2365 if (d != null) { 2366 return d.hasWindowFocus(); 2367 } 2368 } 2369 return false; 2370 } 2371 2372 /** 2373 * Called to process key events. You can override this to intercept all 2374 * key events before they are dispatched to the window. Be sure to call 2375 * this implementation for key events that should be handled normally. 2376 * 2377 * @param event The key event. 2378 * 2379 * @return boolean Return true if this event was consumed. 2380 */ 2381 public boolean dispatchKeyEvent(KeyEvent event) { 2382 onUserInteraction(); 2383 Window win = getWindow(); 2384 if (win.superDispatchKeyEvent(event)) { 2385 return true; 2386 } 2387 View decor = mDecor; 2388 if (decor == null) decor = win.getDecorView(); 2389 return event.dispatch(this, decor != null 2390 ? decor.getKeyDispatcherState() : null, this); 2391 } 2392 2393 /** 2394 * Called to process a key shortcut event. 2395 * You can override this to intercept all key shortcut events before they are 2396 * dispatched to the window. Be sure to call this implementation for key shortcut 2397 * events that should be handled normally. 2398 * 2399 * @param event The key shortcut event. 2400 * @return True if this event was consumed. 2401 */ 2402 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 2403 onUserInteraction(); 2404 if (getWindow().superDispatchKeyShortcutEvent(event)) { 2405 return true; 2406 } 2407 return onKeyShortcut(event.getKeyCode(), event); 2408 } 2409 2410 /** 2411 * Called to process touch screen events. You can override this to 2412 * intercept all touch screen events before they are dispatched to the 2413 * window. Be sure to call this implementation for touch screen events 2414 * that should be handled normally. 2415 * 2416 * @param ev The touch screen event. 2417 * 2418 * @return boolean Return true if this event was consumed. 2419 */ 2420 public boolean dispatchTouchEvent(MotionEvent ev) { 2421 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2422 onUserInteraction(); 2423 } 2424 if (getWindow().superDispatchTouchEvent(ev)) { 2425 return true; 2426 } 2427 return onTouchEvent(ev); 2428 } 2429 2430 /** 2431 * Called to process trackball events. You can override this to 2432 * intercept all trackball events before they are dispatched to the 2433 * window. Be sure to call this implementation for trackball events 2434 * that should be handled normally. 2435 * 2436 * @param ev The trackball event. 2437 * 2438 * @return boolean Return true if this event was consumed. 2439 */ 2440 public boolean dispatchTrackballEvent(MotionEvent ev) { 2441 onUserInteraction(); 2442 if (getWindow().superDispatchTrackballEvent(ev)) { 2443 return true; 2444 } 2445 return onTrackballEvent(ev); 2446 } 2447 2448 /** 2449 * Called to process generic motion events. You can override this to 2450 * intercept all generic motion events before they are dispatched to the 2451 * window. Be sure to call this implementation for generic motion events 2452 * that should be handled normally. 2453 * 2454 * @param ev The generic motion event. 2455 * 2456 * @return boolean Return true if this event was consumed. 2457 */ 2458 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 2459 onUserInteraction(); 2460 if (getWindow().superDispatchGenericMotionEvent(ev)) { 2461 return true; 2462 } 2463 return onGenericMotionEvent(ev); 2464 } 2465 2466 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2467 event.setClassName(getClass().getName()); 2468 event.setPackageName(getPackageName()); 2469 2470 LayoutParams params = getWindow().getAttributes(); 2471 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2472 (params.height == LayoutParams.MATCH_PARENT); 2473 event.setFullScreen(isFullScreen); 2474 2475 CharSequence title = getTitle(); 2476 if (!TextUtils.isEmpty(title)) { 2477 event.getText().add(title); 2478 } 2479 2480 return true; 2481 } 2482 2483 /** 2484 * Default implementation of 2485 * {@link android.view.Window.Callback#onCreatePanelView} 2486 * for activities. This 2487 * simply returns null so that all panel sub-windows will have the default 2488 * menu behavior. 2489 */ 2490 public View onCreatePanelView(int featureId) { 2491 return null; 2492 } 2493 2494 /** 2495 * Default implementation of 2496 * {@link android.view.Window.Callback#onCreatePanelMenu} 2497 * for activities. This calls through to the new 2498 * {@link #onCreateOptionsMenu} method for the 2499 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2500 * so that subclasses of Activity don't need to deal with feature codes. 2501 */ 2502 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2503 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2504 boolean show = onCreateOptionsMenu(menu); 2505 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 2506 return show; 2507 } 2508 return false; 2509 } 2510 2511 /** 2512 * Default implementation of 2513 * {@link android.view.Window.Callback#onPreparePanel} 2514 * for activities. This 2515 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2516 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2517 * panel, so that subclasses of 2518 * Activity don't need to deal with feature codes. 2519 */ 2520 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2521 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2522 boolean goforit = onPrepareOptionsMenu(menu); 2523 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 2524 return goforit; 2525 } 2526 return true; 2527 } 2528 2529 /** 2530 * {@inheritDoc} 2531 * 2532 * @return The default implementation returns true. 2533 */ 2534 public boolean onMenuOpened(int featureId, Menu menu) { 2535 if (featureId == Window.FEATURE_ACTION_BAR) { 2536 initActionBar(); 2537 if (mActionBar != null) { 2538 mActionBar.dispatchMenuVisibilityChanged(true); 2539 } else { 2540 Log.e(TAG, "Tried to open action bar menu with no action bar"); 2541 } 2542 } 2543 return true; 2544 } 2545 2546 /** 2547 * Default implementation of 2548 * {@link android.view.Window.Callback#onMenuItemSelected} 2549 * for activities. This calls through to the new 2550 * {@link #onOptionsItemSelected} method for the 2551 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2552 * panel, so that subclasses of 2553 * Activity don't need to deal with feature codes. 2554 */ 2555 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2556 CharSequence titleCondensed = item.getTitleCondensed(); 2557 2558 switch (featureId) { 2559 case Window.FEATURE_OPTIONS_PANEL: 2560 // Put event logging here so it gets called even if subclass 2561 // doesn't call through to superclass's implmeentation of each 2562 // of these methods below 2563 if(titleCondensed != null) { 2564 EventLog.writeEvent(50000, 0, titleCondensed.toString()); 2565 } 2566 if (onOptionsItemSelected(item)) { 2567 return true; 2568 } 2569 if (mFragments.dispatchOptionsItemSelected(item)) { 2570 return true; 2571 } 2572 if (item.getItemId() == android.R.id.home && mActionBar != null && 2573 (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) { 2574 if (mParent == null) { 2575 return onNavigateUp(); 2576 } else { 2577 return mParent.onNavigateUpFromChild(this); 2578 } 2579 } 2580 return false; 2581 2582 case Window.FEATURE_CONTEXT_MENU: 2583 if(titleCondensed != null) { 2584 EventLog.writeEvent(50000, 1, titleCondensed.toString()); 2585 } 2586 if (onContextItemSelected(item)) { 2587 return true; 2588 } 2589 return mFragments.dispatchContextItemSelected(item); 2590 2591 default: 2592 return false; 2593 } 2594 } 2595 2596 /** 2597 * Default implementation of 2598 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2599 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2600 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2601 * so that subclasses of Activity don't need to deal with feature codes. 2602 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2603 * {@link #onContextMenuClosed(Menu)} will be called. 2604 */ 2605 public void onPanelClosed(int featureId, Menu menu) { 2606 switch (featureId) { 2607 case Window.FEATURE_OPTIONS_PANEL: 2608 mFragments.dispatchOptionsMenuClosed(menu); 2609 onOptionsMenuClosed(menu); 2610 break; 2611 2612 case Window.FEATURE_CONTEXT_MENU: 2613 onContextMenuClosed(menu); 2614 break; 2615 2616 case Window.FEATURE_ACTION_BAR: 2617 initActionBar(); 2618 mActionBar.dispatchMenuVisibilityChanged(false); 2619 break; 2620 } 2621 } 2622 2623 /** 2624 * Declare that the options menu has changed, so should be recreated. 2625 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 2626 * time it needs to be displayed. 2627 */ 2628 public void invalidateOptionsMenu() { 2629 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 2630 } 2631 2632 /** 2633 * Initialize the contents of the Activity's standard options menu. You 2634 * should place your menu items in to <var>menu</var>. 2635 * 2636 * <p>This is only called once, the first time the options menu is 2637 * displayed. To update the menu every time it is displayed, see 2638 * {@link #onPrepareOptionsMenu}. 2639 * 2640 * <p>The default implementation populates the menu with standard system 2641 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2642 * they will be correctly ordered with application-defined menu items. 2643 * Deriving classes should always call through to the base implementation. 2644 * 2645 * <p>You can safely hold on to <var>menu</var> (and any items created 2646 * from it), making modifications to it as desired, until the next 2647 * time onCreateOptionsMenu() is called. 2648 * 2649 * <p>When you add items to the menu, you can implement the Activity's 2650 * {@link #onOptionsItemSelected} method to handle them there. 2651 * 2652 * @param menu The options menu in which you place your items. 2653 * 2654 * @return You must return true for the menu to be displayed; 2655 * if you return false it will not be shown. 2656 * 2657 * @see #onPrepareOptionsMenu 2658 * @see #onOptionsItemSelected 2659 */ 2660 public boolean onCreateOptionsMenu(Menu menu) { 2661 if (mParent != null) { 2662 return mParent.onCreateOptionsMenu(menu); 2663 } 2664 return true; 2665 } 2666 2667 /** 2668 * Prepare the Screen's standard options menu to be displayed. This is 2669 * called right before the menu is shown, every time it is shown. You can 2670 * use this method to efficiently enable/disable items or otherwise 2671 * dynamically modify the contents. 2672 * 2673 * <p>The default implementation updates the system menu items based on the 2674 * activity's state. Deriving classes should always call through to the 2675 * base class implementation. 2676 * 2677 * @param menu The options menu as last shown or first initialized by 2678 * onCreateOptionsMenu(). 2679 * 2680 * @return You must return true for the menu to be displayed; 2681 * if you return false it will not be shown. 2682 * 2683 * @see #onCreateOptionsMenu 2684 */ 2685 public boolean onPrepareOptionsMenu(Menu menu) { 2686 if (mParent != null) { 2687 return mParent.onPrepareOptionsMenu(menu); 2688 } 2689 return true; 2690 } 2691 2692 /** 2693 * This hook is called whenever an item in your options menu is selected. 2694 * The default implementation simply returns false to have the normal 2695 * processing happen (calling the item's Runnable or sending a message to 2696 * its Handler as appropriate). You can use this method for any items 2697 * for which you would like to do processing without those other 2698 * facilities. 2699 * 2700 * <p>Derived classes should call through to the base class for it to 2701 * perform the default menu handling.</p> 2702 * 2703 * @param item The menu item that was selected. 2704 * 2705 * @return boolean Return false to allow normal menu processing to 2706 * proceed, true to consume it here. 2707 * 2708 * @see #onCreateOptionsMenu 2709 */ 2710 public boolean onOptionsItemSelected(MenuItem item) { 2711 if (mParent != null) { 2712 return mParent.onOptionsItemSelected(item); 2713 } 2714 return false; 2715 } 2716 2717 /** 2718 * This method is called whenever the user chooses to navigate Up within your application's 2719 * activity hierarchy from the action bar. 2720 * 2721 * <p>If the attribute {@link android.R.attr#parentActivityName parentActivityName} 2722 * was specified in the manifest for this activity or an activity-alias to it, 2723 * default Up navigation will be handled automatically. If any activity 2724 * along the parent chain requires extra Intent arguments, the Activity subclass 2725 * should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)} 2726 * to supply those arguments.</p> 2727 * 2728 * <p>See <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 2729 * from the developer guide and <a href="{@docRoot}design/patterns/navigation.html">Navigation</a> 2730 * from the design guide for more information about navigating within your app.</p> 2731 * 2732 * <p>See the {@link TaskStackBuilder} class and the Activity methods 2733 * {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and 2734 * {@link #navigateUpTo(Intent)} for help implementing custom Up navigation. 2735 * The AppNavigation sample application in the Android SDK is also available for reference.</p> 2736 * 2737 * @return true if Up navigation completed successfully and this Activity was finished, 2738 * false otherwise. 2739 */ 2740 public boolean onNavigateUp() { 2741 // Automatically handle hierarchical Up navigation if the proper 2742 // metadata is available. 2743 Intent upIntent = getParentActivityIntent(); 2744 if (upIntent != null) { 2745 if (mActivityInfo.taskAffinity == null) { 2746 // Activities with a null affinity are special; they really shouldn't 2747 // specify a parent activity intent in the first place. Just finish 2748 // the current activity and call it a day. 2749 finish(); 2750 } else if (shouldUpRecreateTask(upIntent)) { 2751 TaskStackBuilder b = TaskStackBuilder.create(this); 2752 onCreateNavigateUpTaskStack(b); 2753 onPrepareNavigateUpTaskStack(b); 2754 b.startActivities(); 2755 2756 // We can't finishAffinity if we have a result. 2757 // Fall back and simply finish the current activity instead. 2758 if (mResultCode != RESULT_CANCELED || mResultData != null) { 2759 // Tell the developer what's going on to avoid hair-pulling. 2760 Log.i(TAG, "onNavigateUp only finishing topmost activity to return a result"); 2761 finish(); 2762 } else { 2763 finishAffinity(); 2764 } 2765 } else { 2766 navigateUpTo(upIntent); 2767 } 2768 return true; 2769 } 2770 return false; 2771 } 2772 2773 /** 2774 * This is called when a child activity of this one attempts to navigate up. 2775 * The default implementation simply calls onNavigateUp() on this activity (the parent). 2776 * 2777 * @param child The activity making the call. 2778 */ 2779 public boolean onNavigateUpFromChild(Activity child) { 2780 return onNavigateUp(); 2781 } 2782 2783 /** 2784 * Define the synthetic task stack that will be generated during Up navigation from 2785 * a different task. 2786 * 2787 * <p>The default implementation of this method adds the parent chain of this activity 2788 * as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications 2789 * may choose to override this method to construct the desired task stack in a different 2790 * way.</p> 2791 * 2792 * <p>This method will be invoked by the default implementation of {@link #onNavigateUp()} 2793 * if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent 2794 * returned by {@link #getParentActivityIntent()}.</p> 2795 * 2796 * <p>Applications that wish to supply extra Intent parameters to the parent stack defined 2797 * by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}.</p> 2798 * 2799 * @param builder An empty TaskStackBuilder - the application should add intents representing 2800 * the desired task stack 2801 */ 2802 public void onCreateNavigateUpTaskStack(TaskStackBuilder builder) { 2803 builder.addParentStack(this); 2804 } 2805 2806 /** 2807 * Prepare the synthetic task stack that will be generated during Up navigation 2808 * from a different task. 2809 * 2810 * <p>This method receives the {@link TaskStackBuilder} with the constructed series of 2811 * Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}. 2812 * If any extra data should be added to these intents before launching the new task, 2813 * the application should override this method and add that data here.</p> 2814 * 2815 * @param builder A TaskStackBuilder that has been populated with Intents by 2816 * onCreateNavigateUpTaskStack. 2817 */ 2818 public void onPrepareNavigateUpTaskStack(TaskStackBuilder builder) { 2819 } 2820 2821 /** 2822 * This hook is called whenever the options menu is being closed (either by the user canceling 2823 * the menu with the back/menu button, or when an item is selected). 2824 * 2825 * @param menu The options menu as last shown or first initialized by 2826 * onCreateOptionsMenu(). 2827 */ 2828 public void onOptionsMenuClosed(Menu menu) { 2829 if (mParent != null) { 2830 mParent.onOptionsMenuClosed(menu); 2831 } 2832 } 2833 2834 /** 2835 * Programmatically opens the options menu. If the options menu is already 2836 * open, this method does nothing. 2837 */ 2838 public void openOptionsMenu() { 2839 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2840 } 2841 2842 /** 2843 * Progammatically closes the options menu. If the options menu is already 2844 * closed, this method does nothing. 2845 */ 2846 public void closeOptionsMenu() { 2847 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2848 } 2849 2850 /** 2851 * Called when a context menu for the {@code view} is about to be shown. 2852 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2853 * time the context menu is about to be shown and should be populated for 2854 * the view (or item inside the view for {@link AdapterView} subclasses, 2855 * this can be found in the {@code menuInfo})). 2856 * <p> 2857 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2858 * item has been selected. 2859 * <p> 2860 * It is not safe to hold onto the context menu after this method returns. 2861 * 2862 */ 2863 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2864 } 2865 2866 /** 2867 * Registers a context menu to be shown for the given view (multiple views 2868 * can show the context menu). This method will set the 2869 * {@link OnCreateContextMenuListener} on the view to this activity, so 2870 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2871 * called when it is time to show the context menu. 2872 * 2873 * @see #unregisterForContextMenu(View) 2874 * @param view The view that should show a context menu. 2875 */ 2876 public void registerForContextMenu(View view) { 2877 view.setOnCreateContextMenuListener(this); 2878 } 2879 2880 /** 2881 * Prevents a context menu to be shown for the given view. This method will remove the 2882 * {@link OnCreateContextMenuListener} on the view. 2883 * 2884 * @see #registerForContextMenu(View) 2885 * @param view The view that should stop showing a context menu. 2886 */ 2887 public void unregisterForContextMenu(View view) { 2888 view.setOnCreateContextMenuListener(null); 2889 } 2890 2891 /** 2892 * Programmatically opens the context menu for a particular {@code view}. 2893 * The {@code view} should have been added via 2894 * {@link #registerForContextMenu(View)}. 2895 * 2896 * @param view The view to show the context menu for. 2897 */ 2898 public void openContextMenu(View view) { 2899 view.showContextMenu(); 2900 } 2901 2902 /** 2903 * Programmatically closes the most recently opened context menu, if showing. 2904 */ 2905 public void closeContextMenu() { 2906 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2907 } 2908 2909 /** 2910 * This hook is called whenever an item in a context menu is selected. The 2911 * default implementation simply returns false to have the normal processing 2912 * happen (calling the item's Runnable or sending a message to its Handler 2913 * as appropriate). You can use this method for any items for which you 2914 * would like to do processing without those other facilities. 2915 * <p> 2916 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2917 * View that added this menu item. 2918 * <p> 2919 * Derived classes should call through to the base class for it to perform 2920 * the default menu handling. 2921 * 2922 * @param item The context menu item that was selected. 2923 * @return boolean Return false to allow normal context menu processing to 2924 * proceed, true to consume it here. 2925 */ 2926 public boolean onContextItemSelected(MenuItem item) { 2927 if (mParent != null) { 2928 return mParent.onContextItemSelected(item); 2929 } 2930 return false; 2931 } 2932 2933 /** 2934 * This hook is called whenever the context menu is being closed (either by 2935 * the user canceling the menu with the back/menu button, or when an item is 2936 * selected). 2937 * 2938 * @param menu The context menu that is being closed. 2939 */ 2940 public void onContextMenuClosed(Menu menu) { 2941 if (mParent != null) { 2942 mParent.onContextMenuClosed(menu); 2943 } 2944 } 2945 2946 /** 2947 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2948 */ 2949 @Deprecated 2950 protected Dialog onCreateDialog(int id) { 2951 return null; 2952 } 2953 2954 /** 2955 * Callback for creating dialogs that are managed (saved and restored) for you 2956 * by the activity. The default implementation calls through to 2957 * {@link #onCreateDialog(int)} for compatibility. 2958 * 2959 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2960 * or later, consider instead using a {@link DialogFragment} instead.</em> 2961 * 2962 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2963 * this method the first time, and hang onto it thereafter. Any dialog 2964 * that is created by this method will automatically be saved and restored 2965 * for you, including whether it is showing. 2966 * 2967 * <p>If you would like the activity to manage saving and restoring dialogs 2968 * for you, you should override this method and handle any ids that are 2969 * passed to {@link #showDialog}. 2970 * 2971 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2972 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2973 * 2974 * @param id The id of the dialog. 2975 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2976 * @return The dialog. If you return null, the dialog will not be created. 2977 * 2978 * @see #onPrepareDialog(int, Dialog, Bundle) 2979 * @see #showDialog(int, Bundle) 2980 * @see #dismissDialog(int) 2981 * @see #removeDialog(int) 2982 * 2983 * @deprecated Use the new {@link DialogFragment} class with 2984 * {@link FragmentManager} instead; this is also 2985 * available on older platforms through the Android compatibility package. 2986 */ 2987 @Deprecated 2988 protected Dialog onCreateDialog(int id, Bundle args) { 2989 return onCreateDialog(id); 2990 } 2991 2992 /** 2993 * @deprecated Old no-arguments version of 2994 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2995 */ 2996 @Deprecated 2997 protected void onPrepareDialog(int id, Dialog dialog) { 2998 dialog.setOwnerActivity(this); 2999 } 3000 3001 /** 3002 * Provides an opportunity to prepare a managed dialog before it is being 3003 * shown. The default implementation calls through to 3004 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 3005 * 3006 * <p> 3007 * Override this if you need to update a managed dialog based on the state 3008 * of the application each time it is shown. For example, a time picker 3009 * dialog might want to be updated with the current time. You should call 3010 * through to the superclass's implementation. The default implementation 3011 * will set this Activity as the owner activity on the Dialog. 3012 * 3013 * @param id The id of the managed dialog. 3014 * @param dialog The dialog. 3015 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3016 * @see #onCreateDialog(int, Bundle) 3017 * @see #showDialog(int) 3018 * @see #dismissDialog(int) 3019 * @see #removeDialog(int) 3020 * 3021 * @deprecated Use the new {@link DialogFragment} class with 3022 * {@link FragmentManager} instead; this is also 3023 * available on older platforms through the Android compatibility package. 3024 */ 3025 @Deprecated 3026 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 3027 onPrepareDialog(id, dialog); 3028 } 3029 3030 /** 3031 * Simple version of {@link #showDialog(int, Bundle)} that does not 3032 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 3033 * with null arguments. 3034 * 3035 * @deprecated Use the new {@link DialogFragment} class with 3036 * {@link FragmentManager} instead; this is also 3037 * available on older platforms through the Android compatibility package. 3038 */ 3039 @Deprecated 3040 public final void showDialog(int id) { 3041 showDialog(id, null); 3042 } 3043 3044 /** 3045 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 3046 * will be made with the same id the first time this is called for a given 3047 * id. From thereafter, the dialog will be automatically saved and restored. 3048 * 3049 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3050 * or later, consider instead using a {@link DialogFragment} instead.</em> 3051 * 3052 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 3053 * be made to provide an opportunity to do any timely preparation. 3054 * 3055 * @param id The id of the managed dialog. 3056 * @param args Arguments to pass through to the dialog. These will be saved 3057 * and restored for you. Note that if the dialog is already created, 3058 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 3059 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 3060 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 3061 * @return Returns true if the Dialog was created; false is returned if 3062 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 3063 * 3064 * @see Dialog 3065 * @see #onCreateDialog(int, Bundle) 3066 * @see #onPrepareDialog(int, Dialog, Bundle) 3067 * @see #dismissDialog(int) 3068 * @see #removeDialog(int) 3069 * 3070 * @deprecated Use the new {@link DialogFragment} class with 3071 * {@link FragmentManager} instead; this is also 3072 * available on older platforms through the Android compatibility package. 3073 */ 3074 @Deprecated 3075 public final boolean showDialog(int id, Bundle args) { 3076 if (mManagedDialogs == null) { 3077 mManagedDialogs = new SparseArray<ManagedDialog>(); 3078 } 3079 ManagedDialog md = mManagedDialogs.get(id); 3080 if (md == null) { 3081 md = new ManagedDialog(); 3082 md.mDialog = createDialog(id, null, args); 3083 if (md.mDialog == null) { 3084 return false; 3085 } 3086 mManagedDialogs.put(id, md); 3087 } 3088 3089 md.mArgs = args; 3090 onPrepareDialog(id, md.mDialog, args); 3091 md.mDialog.show(); 3092 return true; 3093 } 3094 3095 /** 3096 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 3097 * 3098 * @param id The id of the managed dialog. 3099 * 3100 * @throws IllegalArgumentException if the id was not previously shown via 3101 * {@link #showDialog(int)}. 3102 * 3103 * @see #onCreateDialog(int, Bundle) 3104 * @see #onPrepareDialog(int, Dialog, Bundle) 3105 * @see #showDialog(int) 3106 * @see #removeDialog(int) 3107 * 3108 * @deprecated Use the new {@link DialogFragment} class with 3109 * {@link FragmentManager} instead; this is also 3110 * available on older platforms through the Android compatibility package. 3111 */ 3112 @Deprecated 3113 public final void dismissDialog(int id) { 3114 if (mManagedDialogs == null) { 3115 throw missingDialog(id); 3116 } 3117 3118 final ManagedDialog md = mManagedDialogs.get(id); 3119 if (md == null) { 3120 throw missingDialog(id); 3121 } 3122 md.mDialog.dismiss(); 3123 } 3124 3125 /** 3126 * Creates an exception to throw if a user passed in a dialog id that is 3127 * unexpected. 3128 */ 3129 private IllegalArgumentException missingDialog(int id) { 3130 return new IllegalArgumentException("no dialog with id " + id + " was ever " 3131 + "shown via Activity#showDialog"); 3132 } 3133 3134 /** 3135 * Removes any internal references to a dialog managed by this Activity. 3136 * If the dialog is showing, it will dismiss it as part of the clean up. 3137 * 3138 * <p>This can be useful if you know that you will never show a dialog again and 3139 * want to avoid the overhead of saving and restoring it in the future. 3140 * 3141 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 3142 * will not throw an exception if you try to remove an ID that does not 3143 * currently have an associated dialog.</p> 3144 * 3145 * @param id The id of the managed dialog. 3146 * 3147 * @see #onCreateDialog(int, Bundle) 3148 * @see #onPrepareDialog(int, Dialog, Bundle) 3149 * @see #showDialog(int) 3150 * @see #dismissDialog(int) 3151 * 3152 * @deprecated Use the new {@link DialogFragment} class with 3153 * {@link FragmentManager} instead; this is also 3154 * available on older platforms through the Android compatibility package. 3155 */ 3156 @Deprecated 3157 public final void removeDialog(int id) { 3158 if (mManagedDialogs != null) { 3159 final ManagedDialog md = mManagedDialogs.get(id); 3160 if (md != null) { 3161 md.mDialog.dismiss(); 3162 mManagedDialogs.remove(id); 3163 } 3164 } 3165 } 3166 3167 /** 3168 * This hook is called when the user signals the desire to start a search. 3169 * 3170 * <p>You can use this function as a simple way to launch the search UI, in response to a 3171 * menu item, search button, or other widgets within your activity. Unless overidden, 3172 * calling this function is the same as calling 3173 * {@link #startSearch startSearch(null, false, null, false)}, which launches 3174 * search for the current activity as specified in its manifest, see {@link SearchManager}. 3175 * 3176 * <p>You can override this function to force global search, e.g. in response to a dedicated 3177 * search key, or to block search entirely (by simply returning false). 3178 * 3179 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 3180 * The default implementation always returns {@code true}. 3181 * 3182 * @see android.app.SearchManager 3183 */ 3184 public boolean onSearchRequested() { 3185 startSearch(null, false, null, false); 3186 return true; 3187 } 3188 3189 /** 3190 * This hook is called to launch the search UI. 3191 * 3192 * <p>It is typically called from onSearchRequested(), either directly from 3193 * Activity.onSearchRequested() or from an overridden version in any given 3194 * Activity. If your goal is simply to activate search, it is preferred to call 3195 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 3196 * is to inject specific data such as context data, it is preferred to <i>override</i> 3197 * onSearchRequested(), so that any callers to it will benefit from the override. 3198 * 3199 * @param initialQuery Any non-null non-empty string will be inserted as 3200 * pre-entered text in the search query box. 3201 * @param selectInitialQuery If true, the intial query will be preselected, which means that 3202 * any further typing will replace it. This is useful for cases where an entire pre-formed 3203 * query is being inserted. If false, the selection point will be placed at the end of the 3204 * inserted query. This is useful when the inserted query is text that the user entered, 3205 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 3206 * if initialQuery is a non-empty string.</i> 3207 * @param appSearchData An application can insert application-specific 3208 * context here, in order to improve quality or specificity of its own 3209 * searches. This data will be returned with SEARCH intent(s). Null if 3210 * no extra data is required. 3211 * @param globalSearch If false, this will only launch the search that has been specifically 3212 * defined by the application (which is usually defined as a local search). If no default 3213 * search is defined in the current application or activity, global search will be launched. 3214 * If true, this will always launch a platform-global (e.g. web-based) search instead. 3215 * 3216 * @see android.app.SearchManager 3217 * @see #onSearchRequested 3218 */ 3219 public void startSearch(String initialQuery, boolean selectInitialQuery, 3220 Bundle appSearchData, boolean globalSearch) { 3221 ensureSearchManager(); 3222 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 3223 appSearchData, globalSearch); 3224 } 3225 3226 /** 3227 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 3228 * the search dialog. Made available for testing purposes. 3229 * 3230 * @param query The query to trigger. If empty, the request will be ignored. 3231 * @param appSearchData An application can insert application-specific 3232 * context here, in order to improve quality or specificity of its own 3233 * searches. This data will be returned with SEARCH intent(s). Null if 3234 * no extra data is required. 3235 */ 3236 public void triggerSearch(String query, Bundle appSearchData) { 3237 ensureSearchManager(); 3238 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 3239 } 3240 3241 /** 3242 * Request that key events come to this activity. Use this if your 3243 * activity has no views with focus, but the activity still wants 3244 * a chance to process key events. 3245 * 3246 * @see android.view.Window#takeKeyEvents 3247 */ 3248 public void takeKeyEvents(boolean get) { 3249 getWindow().takeKeyEvents(get); 3250 } 3251 3252 /** 3253 * Enable extended window features. This is a convenience for calling 3254 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 3255 * 3256 * @param featureId The desired feature as defined in 3257 * {@link android.view.Window}. 3258 * @return Returns true if the requested feature is supported and now 3259 * enabled. 3260 * 3261 * @see android.view.Window#requestFeature 3262 */ 3263 public final boolean requestWindowFeature(int featureId) { 3264 return getWindow().requestFeature(featureId); 3265 } 3266 3267 /** 3268 * Convenience for calling 3269 * {@link android.view.Window#setFeatureDrawableResource}. 3270 */ 3271 public final void setFeatureDrawableResource(int featureId, int resId) { 3272 getWindow().setFeatureDrawableResource(featureId, resId); 3273 } 3274 3275 /** 3276 * Convenience for calling 3277 * {@link android.view.Window#setFeatureDrawableUri}. 3278 */ 3279 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3280 getWindow().setFeatureDrawableUri(featureId, uri); 3281 } 3282 3283 /** 3284 * Convenience for calling 3285 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3286 */ 3287 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3288 getWindow().setFeatureDrawable(featureId, drawable); 3289 } 3290 3291 /** 3292 * Convenience for calling 3293 * {@link android.view.Window#setFeatureDrawableAlpha}. 3294 */ 3295 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3296 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3297 } 3298 3299 /** 3300 * Convenience for calling 3301 * {@link android.view.Window#getLayoutInflater}. 3302 */ 3303 public LayoutInflater getLayoutInflater() { 3304 return getWindow().getLayoutInflater(); 3305 } 3306 3307 /** 3308 * Returns a {@link MenuInflater} with this context. 3309 */ 3310 public MenuInflater getMenuInflater() { 3311 // Make sure that action views can get an appropriate theme. 3312 if (mMenuInflater == null) { 3313 initActionBar(); 3314 if (mActionBar != null) { 3315 mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this); 3316 } else { 3317 mMenuInflater = new MenuInflater(this); 3318 } 3319 } 3320 return mMenuInflater; 3321 } 3322 3323 @Override 3324 protected void onApplyThemeResource(Resources.Theme theme, int resid, 3325 boolean first) { 3326 if (mParent == null) { 3327 super.onApplyThemeResource(theme, resid, first); 3328 } else { 3329 try { 3330 theme.setTo(mParent.getTheme()); 3331 } catch (Exception e) { 3332 // Empty 3333 } 3334 theme.applyStyle(resid, false); 3335 } 3336 } 3337 3338 /** 3339 * Same as calling {@link #startActivityForResult(Intent, int, Bundle)} 3340 * with no options. 3341 * 3342 * @param intent The intent to start. 3343 * @param requestCode If >= 0, this code will be returned in 3344 * onActivityResult() when the activity exits. 3345 * 3346 * @throws android.content.ActivityNotFoundException 3347 * 3348 * @see #startActivity 3349 */ 3350 public void startActivityForResult(Intent intent, int requestCode) { 3351 startActivityForResult(intent, requestCode, null); 3352 } 3353 3354 /** 3355 * Launch an activity for which you would like a result when it finished. 3356 * When this activity exits, your 3357 * onActivityResult() method will be called with the given requestCode. 3358 * Using a negative requestCode is the same as calling 3359 * {@link #startActivity} (the activity is not launched as a sub-activity). 3360 * 3361 * <p>Note that this method should only be used with Intent protocols 3362 * that are defined to return a result. In other protocols (such as 3363 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 3364 * not get the result when you expect. For example, if the activity you 3365 * are launching uses the singleTask launch mode, it will not run in your 3366 * task and thus you will immediately receive a cancel result. 3367 * 3368 * <p>As a special case, if you call startActivityForResult() with a requestCode 3369 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 3370 * activity, then your window will not be displayed until a result is 3371 * returned back from the started activity. This is to avoid visible 3372 * flickering when redirecting to another activity. 3373 * 3374 * <p>This method throws {@link android.content.ActivityNotFoundException} 3375 * if there was no Activity found to run the given Intent. 3376 * 3377 * @param intent The intent to start. 3378 * @param requestCode If >= 0, this code will be returned in 3379 * onActivityResult() when the activity exits. 3380 * @param options Additional options for how the Activity should be started. 3381 * See {@link android.content.Context#startActivity(Intent, Bundle) 3382 * Context.startActivity(Intent, Bundle)} for more details. 3383 * 3384 * @throws android.content.ActivityNotFoundException 3385 * 3386 * @see #startActivity 3387 */ 3388 public void startActivityForResult(Intent intent, int requestCode, Bundle options) { 3389 if (mParent == null) { 3390 Instrumentation.ActivityResult ar = 3391 mInstrumentation.execStartActivity( 3392 this, mMainThread.getApplicationThread(), mToken, this, 3393 intent, requestCode, options); 3394 if (ar != null) { 3395 mMainThread.sendActivityResult( 3396 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 3397 ar.getResultData()); 3398 } 3399 if (requestCode >= 0) { 3400 // If this start is requesting a result, we can avoid making 3401 // the activity visible until the result is received. Setting 3402 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3403 // activity hidden during this time, to avoid flickering. 3404 // This can only be done when a result is requested because 3405 // that guarantees we will get information back when the 3406 // activity is finished, no matter what happens to it. 3407 mStartedActivity = true; 3408 } 3409 } else { 3410 if (options != null) { 3411 mParent.startActivityFromChild(this, intent, requestCode, options); 3412 } else { 3413 // Note we want to go through this method for compatibility with 3414 // existing applications that may have overridden it. 3415 mParent.startActivityFromChild(this, intent, requestCode); 3416 } 3417 } 3418 } 3419 3420 /** 3421 * @hide Implement to provide correct calling token. 3422 */ 3423 public void startActivityAsUser(Intent intent, UserHandle user) { 3424 startActivityAsUser(intent, null, user); 3425 } 3426 3427 /** 3428 * @hide Implement to provide correct calling token. 3429 */ 3430 public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) { 3431 if (mParent != null) { 3432 throw new RuntimeException("Called be called from a child"); 3433 } 3434 Instrumentation.ActivityResult ar = 3435 mInstrumentation.execStartActivity( 3436 this, mMainThread.getApplicationThread(), mToken, this, 3437 intent, -1, options, user); 3438 if (ar != null) { 3439 mMainThread.sendActivityResult( 3440 mToken, mEmbeddedID, -1, ar.getResultCode(), 3441 ar.getResultData()); 3442 } 3443 } 3444 3445 /** 3446 * Same as calling {@link #startIntentSenderForResult(IntentSender, int, 3447 * Intent, int, int, int, Bundle)} with no options. 3448 * 3449 * @param intent The IntentSender to launch. 3450 * @param requestCode If >= 0, this code will be returned in 3451 * onActivityResult() when the activity exits. 3452 * @param fillInIntent If non-null, this will be provided as the 3453 * intent parameter to {@link IntentSender#sendIntent}. 3454 * @param flagsMask Intent flags in the original IntentSender that you 3455 * would like to change. 3456 * @param flagsValues Desired values for any bits set in 3457 * <var>flagsMask</var> 3458 * @param extraFlags Always set to 0. 3459 */ 3460 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3461 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3462 throws IntentSender.SendIntentException { 3463 startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, 3464 flagsValues, extraFlags, null); 3465 } 3466 3467 /** 3468 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 3469 * to use a IntentSender to describe the activity to be started. If 3470 * the IntentSender is for an activity, that activity will be started 3471 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 3472 * here; otherwise, its associated action will be executed (such as 3473 * sending a broadcast) as if you had called 3474 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 3475 * 3476 * @param intent The IntentSender to launch. 3477 * @param requestCode If >= 0, this code will be returned in 3478 * onActivityResult() when the activity exits. 3479 * @param fillInIntent If non-null, this will be provided as the 3480 * intent parameter to {@link IntentSender#sendIntent}. 3481 * @param flagsMask Intent flags in the original IntentSender that you 3482 * would like to change. 3483 * @param flagsValues Desired values for any bits set in 3484 * <var>flagsMask</var> 3485 * @param extraFlags Always set to 0. 3486 * @param options Additional options for how the Activity should be started. 3487 * See {@link android.content.Context#startActivity(Intent, Bundle) 3488 * Context.startActivity(Intent, Bundle)} for more details. If options 3489 * have also been supplied by the IntentSender, options given here will 3490 * override any that conflict with those given by the IntentSender. 3491 */ 3492 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3493 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 3494 Bundle options) throws IntentSender.SendIntentException { 3495 if (mParent == null) { 3496 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3497 flagsMask, flagsValues, this, options); 3498 } else if (options != null) { 3499 mParent.startIntentSenderFromChild(this, intent, requestCode, 3500 fillInIntent, flagsMask, flagsValues, extraFlags, options); 3501 } else { 3502 // Note we want to go through this call for compatibility with 3503 // existing applications that may have overridden the method. 3504 mParent.startIntentSenderFromChild(this, intent, requestCode, 3505 fillInIntent, flagsMask, flagsValues, extraFlags); 3506 } 3507 } 3508 3509 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 3510 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity, 3511 Bundle options) 3512 throws IntentSender.SendIntentException { 3513 try { 3514 String resolvedType = null; 3515 if (fillInIntent != null) { 3516 fillInIntent.setAllowFds(false); 3517 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 3518 } 3519 int result = ActivityManagerNative.getDefault() 3520 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 3521 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 3522 requestCode, flagsMask, flagsValues, options); 3523 if (result == ActivityManager.START_CANCELED) { 3524 throw new IntentSender.SendIntentException(); 3525 } 3526 Instrumentation.checkStartActivityResult(result, null); 3527 } catch (RemoteException e) { 3528 } 3529 if (requestCode >= 0) { 3530 // If this start is requesting a result, we can avoid making 3531 // the activity visible until the result is received. Setting 3532 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3533 // activity hidden during this time, to avoid flickering. 3534 // This can only be done when a result is requested because 3535 // that guarantees we will get information back when the 3536 // activity is finished, no matter what happens to it. 3537 mStartedActivity = true; 3538 } 3539 } 3540 3541 /** 3542 * Same as {@link #startActivity(Intent, Bundle)} with no options 3543 * specified. 3544 * 3545 * @param intent The intent to start. 3546 * 3547 * @throws android.content.ActivityNotFoundException 3548 * 3549 * @see {@link #startActivity(Intent, Bundle)} 3550 * @see #startActivityForResult 3551 */ 3552 @Override 3553 public void startActivity(Intent intent) { 3554 startActivity(intent, null); 3555 } 3556 3557 /** 3558 * Launch a new activity. You will not receive any information about when 3559 * the activity exits. This implementation overrides the base version, 3560 * providing information about 3561 * the activity performing the launch. Because of this additional 3562 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3563 * required; if not specified, the new activity will be added to the 3564 * task of the caller. 3565 * 3566 * <p>This method throws {@link android.content.ActivityNotFoundException} 3567 * if there was no Activity found to run the given Intent. 3568 * 3569 * @param intent The intent to start. 3570 * @param options Additional options for how the Activity should be started. 3571 * See {@link android.content.Context#startActivity(Intent, Bundle) 3572 * Context.startActivity(Intent, Bundle)} for more details. 3573 * 3574 * @throws android.content.ActivityNotFoundException 3575 * 3576 * @see {@link #startActivity(Intent)} 3577 * @see #startActivityForResult 3578 */ 3579 @Override 3580 public void startActivity(Intent intent, Bundle options) { 3581 if (options != null) { 3582 startActivityForResult(intent, -1, options); 3583 } else { 3584 // Note we want to go through this call for compatibility with 3585 // applications that may have overridden the method. 3586 startActivityForResult(intent, -1); 3587 } 3588 } 3589 3590 /** 3591 * Same as {@link #startActivities(Intent[], Bundle)} with no options 3592 * specified. 3593 * 3594 * @param intents The intents to start. 3595 * 3596 * @throws android.content.ActivityNotFoundException 3597 * 3598 * @see {@link #startActivities(Intent[], Bundle)} 3599 * @see #startActivityForResult 3600 */ 3601 @Override 3602 public void startActivities(Intent[] intents) { 3603 startActivities(intents, null); 3604 } 3605 3606 /** 3607 * Launch a new activity. You will not receive any information about when 3608 * the activity exits. This implementation overrides the base version, 3609 * providing information about 3610 * the activity performing the launch. Because of this additional 3611 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3612 * required; if not specified, the new activity will be added to the 3613 * task of the caller. 3614 * 3615 * <p>This method throws {@link android.content.ActivityNotFoundException} 3616 * if there was no Activity found to run the given Intent. 3617 * 3618 * @param intents The intents to start. 3619 * @param options Additional options for how the Activity should be started. 3620 * See {@link android.content.Context#startActivity(Intent, Bundle) 3621 * Context.startActivity(Intent, Bundle)} for more details. 3622 * 3623 * @throws android.content.ActivityNotFoundException 3624 * 3625 * @see {@link #startActivities(Intent[])} 3626 * @see #startActivityForResult 3627 */ 3628 @Override 3629 public void startActivities(Intent[] intents, Bundle options) { 3630 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 3631 mToken, this, intents, options); 3632 } 3633 3634 /** 3635 * Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 3636 * with no options. 3637 * 3638 * @param intent The IntentSender to launch. 3639 * @param fillInIntent If non-null, this will be provided as the 3640 * intent parameter to {@link IntentSender#sendIntent}. 3641 * @param flagsMask Intent flags in the original IntentSender that you 3642 * would like to change. 3643 * @param flagsValues Desired values for any bits set in 3644 * <var>flagsMask</var> 3645 * @param extraFlags Always set to 0. 3646 */ 3647 public void startIntentSender(IntentSender intent, 3648 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3649 throws IntentSender.SendIntentException { 3650 startIntentSender(intent, fillInIntent, flagsMask, flagsValues, 3651 extraFlags, null); 3652 } 3653 3654 /** 3655 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 3656 * to start; see 3657 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)} 3658 * for more information. 3659 * 3660 * @param intent The IntentSender to launch. 3661 * @param fillInIntent If non-null, this will be provided as the 3662 * intent parameter to {@link IntentSender#sendIntent}. 3663 * @param flagsMask Intent flags in the original IntentSender that you 3664 * would like to change. 3665 * @param flagsValues Desired values for any bits set in 3666 * <var>flagsMask</var> 3667 * @param extraFlags Always set to 0. 3668 * @param options Additional options for how the Activity should be started. 3669 * See {@link android.content.Context#startActivity(Intent, Bundle) 3670 * Context.startActivity(Intent, Bundle)} for more details. If options 3671 * have also been supplied by the IntentSender, options given here will 3672 * override any that conflict with those given by the IntentSender. 3673 */ 3674 public void startIntentSender(IntentSender intent, 3675 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 3676 Bundle options) throws IntentSender.SendIntentException { 3677 if (options != null) { 3678 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3679 flagsValues, extraFlags, options); 3680 } else { 3681 // Note we want to go through this call for compatibility with 3682 // applications that may have overridden the method. 3683 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3684 flagsValues, extraFlags); 3685 } 3686 } 3687 3688 /** 3689 * Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)} 3690 * with no options. 3691 * 3692 * @param intent The intent to start. 3693 * @param requestCode If >= 0, this code will be returned in 3694 * onActivityResult() when the activity exits, as described in 3695 * {@link #startActivityForResult}. 3696 * 3697 * @return If a new activity was launched then true is returned; otherwise 3698 * false is returned and you must handle the Intent yourself. 3699 * 3700 * @see #startActivity 3701 * @see #startActivityForResult 3702 */ 3703 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 3704 return startActivityIfNeeded(intent, requestCode, null); 3705 } 3706 3707 /** 3708 * A special variation to launch an activity only if a new activity 3709 * instance is needed to handle the given Intent. In other words, this is 3710 * just like {@link #startActivityForResult(Intent, int)} except: if you are 3711 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 3712 * singleTask or singleTop 3713 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 3714 * and the activity 3715 * that handles <var>intent</var> is the same as your currently running 3716 * activity, then a new instance is not needed. In this case, instead of 3717 * the normal behavior of calling {@link #onNewIntent} this function will 3718 * return and you can handle the Intent yourself. 3719 * 3720 * <p>This function can only be called from a top-level activity; if it is 3721 * called from a child activity, a runtime exception will be thrown. 3722 * 3723 * @param intent The intent to start. 3724 * @param requestCode If >= 0, this code will be returned in 3725 * onActivityResult() when the activity exits, as described in 3726 * {@link #startActivityForResult}. 3727 * @param options Additional options for how the Activity should be started. 3728 * See {@link android.content.Context#startActivity(Intent, Bundle) 3729 * Context.startActivity(Intent, Bundle)} for more details. 3730 * 3731 * @return If a new activity was launched then true is returned; otherwise 3732 * false is returned and you must handle the Intent yourself. 3733 * 3734 * @see #startActivity 3735 * @see #startActivityForResult 3736 */ 3737 public boolean startActivityIfNeeded(Intent intent, int requestCode, Bundle options) { 3738 if (mParent == null) { 3739 int result = ActivityManager.START_RETURN_INTENT_TO_CALLER; 3740 try { 3741 intent.setAllowFds(false); 3742 result = ActivityManagerNative.getDefault() 3743 .startActivity(mMainThread.getApplicationThread(), 3744 intent, intent.resolveTypeIfNeeded(getContentResolver()), 3745 mToken, mEmbeddedID, requestCode, 3746 ActivityManager.START_FLAG_ONLY_IF_NEEDED, null, null, 3747 options); 3748 } catch (RemoteException e) { 3749 // Empty 3750 } 3751 3752 Instrumentation.checkStartActivityResult(result, intent); 3753 3754 if (requestCode >= 0) { 3755 // If this start is requesting a result, we can avoid making 3756 // the activity visible until the result is received. Setting 3757 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3758 // activity hidden during this time, to avoid flickering. 3759 // This can only be done when a result is requested because 3760 // that guarantees we will get information back when the 3761 // activity is finished, no matter what happens to it. 3762 mStartedActivity = true; 3763 } 3764 return result != ActivityManager.START_RETURN_INTENT_TO_CALLER; 3765 } 3766 3767 throw new UnsupportedOperationException( 3768 "startActivityIfNeeded can only be called from a top-level activity"); 3769 } 3770 3771 /** 3772 * Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with 3773 * no options. 3774 * 3775 * @param intent The intent to dispatch to the next activity. For 3776 * correct behavior, this must be the same as the Intent that started 3777 * your own activity; the only changes you can make are to the extras 3778 * inside of it. 3779 * 3780 * @return Returns a boolean indicating whether there was another Activity 3781 * to start: true if there was a next activity to start, false if there 3782 * wasn't. In general, if true is returned you will then want to call 3783 * finish() on yourself. 3784 */ 3785 public boolean startNextMatchingActivity(Intent intent) { 3786 return startNextMatchingActivity(intent, null); 3787 } 3788 3789 /** 3790 * Special version of starting an activity, for use when you are replacing 3791 * other activity components. You can use this to hand the Intent off 3792 * to the next Activity that can handle it. You typically call this in 3793 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3794 * 3795 * @param intent The intent to dispatch to the next activity. For 3796 * correct behavior, this must be the same as the Intent that started 3797 * your own activity; the only changes you can make are to the extras 3798 * inside of it. 3799 * @param options Additional options for how the Activity should be started. 3800 * See {@link android.content.Context#startActivity(Intent, Bundle) 3801 * Context.startActivity(Intent, Bundle)} for more details. 3802 * 3803 * @return Returns a boolean indicating whether there was another Activity 3804 * to start: true if there was a next activity to start, false if there 3805 * wasn't. In general, if true is returned you will then want to call 3806 * finish() on yourself. 3807 */ 3808 public boolean startNextMatchingActivity(Intent intent, Bundle options) { 3809 if (mParent == null) { 3810 try { 3811 intent.setAllowFds(false); 3812 return ActivityManagerNative.getDefault() 3813 .startNextMatchingActivity(mToken, intent, options); 3814 } catch (RemoteException e) { 3815 // Empty 3816 } 3817 return false; 3818 } 3819 3820 throw new UnsupportedOperationException( 3821 "startNextMatchingActivity can only be called from a top-level activity"); 3822 } 3823 3824 /** 3825 * Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)} 3826 * with no options. 3827 * 3828 * @param child The activity making the call. 3829 * @param intent The intent to start. 3830 * @param requestCode Reply request code. < 0 if reply is not requested. 3831 * 3832 * @throws android.content.ActivityNotFoundException 3833 * 3834 * @see #startActivity 3835 * @see #startActivityForResult 3836 */ 3837 public void startActivityFromChild(Activity child, Intent intent, 3838 int requestCode) { 3839 startActivityFromChild(child, intent, requestCode, null); 3840 } 3841 3842 /** 3843 * This is called when a child activity of this one calls its 3844 * {@link #startActivity} or {@link #startActivityForResult} method. 3845 * 3846 * <p>This method throws {@link android.content.ActivityNotFoundException} 3847 * if there was no Activity found to run the given Intent. 3848 * 3849 * @param child The activity making the call. 3850 * @param intent The intent to start. 3851 * @param requestCode Reply request code. < 0 if reply is not requested. 3852 * @param options Additional options for how the Activity should be started. 3853 * See {@link android.content.Context#startActivity(Intent, Bundle) 3854 * Context.startActivity(Intent, Bundle)} for more details. 3855 * 3856 * @throws android.content.ActivityNotFoundException 3857 * 3858 * @see #startActivity 3859 * @see #startActivityForResult 3860 */ 3861 public void startActivityFromChild(Activity child, Intent intent, 3862 int requestCode, Bundle options) { 3863 Instrumentation.ActivityResult ar = 3864 mInstrumentation.execStartActivity( 3865 this, mMainThread.getApplicationThread(), mToken, child, 3866 intent, requestCode, options); 3867 if (ar != null) { 3868 mMainThread.sendActivityResult( 3869 mToken, child.mEmbeddedID, requestCode, 3870 ar.getResultCode(), ar.getResultData()); 3871 } 3872 } 3873 3874 /** 3875 * Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)} 3876 * with no options. 3877 * 3878 * @param fragment The fragment making the call. 3879 * @param intent The intent to start. 3880 * @param requestCode Reply request code. < 0 if reply is not requested. 3881 * 3882 * @throws android.content.ActivityNotFoundException 3883 * 3884 * @see Fragment#startActivity 3885 * @see Fragment#startActivityForResult 3886 */ 3887 public void startActivityFromFragment(Fragment fragment, Intent intent, 3888 int requestCode) { 3889 startActivityFromFragment(fragment, intent, requestCode, null); 3890 } 3891 3892 /** 3893 * This is called when a Fragment in this activity calls its 3894 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 3895 * method. 3896 * 3897 * <p>This method throws {@link android.content.ActivityNotFoundException} 3898 * if there was no Activity found to run the given Intent. 3899 * 3900 * @param fragment The fragment making the call. 3901 * @param intent The intent to start. 3902 * @param requestCode Reply request code. < 0 if reply is not requested. 3903 * @param options Additional options for how the Activity should be started. 3904 * See {@link android.content.Context#startActivity(Intent, Bundle) 3905 * Context.startActivity(Intent, Bundle)} for more details. 3906 * 3907 * @throws android.content.ActivityNotFoundException 3908 * 3909 * @see Fragment#startActivity 3910 * @see Fragment#startActivityForResult 3911 */ 3912 public void startActivityFromFragment(Fragment fragment, Intent intent, 3913 int requestCode, Bundle options) { 3914 Instrumentation.ActivityResult ar = 3915 mInstrumentation.execStartActivity( 3916 this, mMainThread.getApplicationThread(), mToken, fragment, 3917 intent, requestCode, options); 3918 if (ar != null) { 3919 mMainThread.sendActivityResult( 3920 mToken, fragment.mWho, requestCode, 3921 ar.getResultCode(), ar.getResultData()); 3922 } 3923 } 3924 3925 /** 3926 * Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender, 3927 * int, Intent, int, int, int, Bundle)} with no options. 3928 */ 3929 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3930 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3931 int extraFlags) 3932 throws IntentSender.SendIntentException { 3933 startIntentSenderFromChild(child, intent, requestCode, fillInIntent, 3934 flagsMask, flagsValues, extraFlags, null); 3935 } 3936 3937 /** 3938 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3939 * taking a IntentSender; see 3940 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3941 * for more information. 3942 */ 3943 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3944 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3945 int extraFlags, Bundle options) 3946 throws IntentSender.SendIntentException { 3947 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3948 flagsMask, flagsValues, child, options); 3949 } 3950 3951 /** 3952 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3953 * or {@link #finish} to specify an explicit transition animation to 3954 * perform next. 3955 * 3956 * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative 3957 * to using this with starting activities is to supply the desired animation 3958 * information through a {@link ActivityOptions} bundle to 3959 * {@link #startActivity(Intent, Bundle) or a related function. This allows 3960 * you to specify a custom animation even when starting an activity from 3961 * outside the context of the current top activity. 3962 * 3963 * @param enterAnim A resource ID of the animation resource to use for 3964 * the incoming activity. Use 0 for no animation. 3965 * @param exitAnim A resource ID of the animation resource to use for 3966 * the outgoing activity. Use 0 for no animation. 3967 */ 3968 public void overridePendingTransition(int enterAnim, int exitAnim) { 3969 try { 3970 ActivityManagerNative.getDefault().overridePendingTransition( 3971 mToken, getPackageName(), enterAnim, exitAnim); 3972 } catch (RemoteException e) { 3973 } 3974 } 3975 3976 /** 3977 * Call this to set the result that your activity will return to its 3978 * caller. 3979 * 3980 * @param resultCode The result code to propagate back to the originating 3981 * activity, often RESULT_CANCELED or RESULT_OK 3982 * 3983 * @see #RESULT_CANCELED 3984 * @see #RESULT_OK 3985 * @see #RESULT_FIRST_USER 3986 * @see #setResult(int, Intent) 3987 */ 3988 public final void setResult(int resultCode) { 3989 synchronized (this) { 3990 mResultCode = resultCode; 3991 mResultData = null; 3992 } 3993 } 3994 3995 /** 3996 * Call this to set the result that your activity will return to its 3997 * caller. 3998 * 3999 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 4000 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 4001 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 4002 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 4003 * Activity receiving the result access to the specific URIs in the Intent. 4004 * Access will remain until the Activity has finished (it will remain across the hosting 4005 * process being killed and other temporary destruction) and will be added 4006 * to any existing set of URI permissions it already holds. 4007 * 4008 * @param resultCode The result code to propagate back to the originating 4009 * activity, often RESULT_CANCELED or RESULT_OK 4010 * @param data The data to propagate back to the originating activity. 4011 * 4012 * @see #RESULT_CANCELED 4013 * @see #RESULT_OK 4014 * @see #RESULT_FIRST_USER 4015 * @see #setResult(int) 4016 */ 4017 public final void setResult(int resultCode, Intent data) { 4018 synchronized (this) { 4019 mResultCode = resultCode; 4020 mResultData = data; 4021 } 4022 } 4023 4024 /** 4025 * Return the name of the package that invoked this activity. This is who 4026 * the data in {@link #setResult setResult()} will be sent to. You can 4027 * use this information to validate that the recipient is allowed to 4028 * receive the data. 4029 * 4030 * <p>Note: if the calling activity is not expecting a result (that is it 4031 * did not use the {@link #startActivityForResult} 4032 * form that includes a request code), then the calling package will be 4033 * null. 4034 * 4035 * @return The package of the activity that will receive your 4036 * reply, or null if none. 4037 */ 4038 public String getCallingPackage() { 4039 try { 4040 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 4041 } catch (RemoteException e) { 4042 return null; 4043 } 4044 } 4045 4046 /** 4047 * Return the name of the activity that invoked this activity. This is 4048 * who the data in {@link #setResult setResult()} will be sent to. You 4049 * can use this information to validate that the recipient is allowed to 4050 * receive the data. 4051 * 4052 * <p>Note: if the calling activity is not expecting a result (that is it 4053 * did not use the {@link #startActivityForResult} 4054 * form that includes a request code), then the calling package will be 4055 * null. 4056 * 4057 * @return String The full name of the activity that will receive your 4058 * reply, or null if none. 4059 */ 4060 public ComponentName getCallingActivity() { 4061 try { 4062 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 4063 } catch (RemoteException e) { 4064 return null; 4065 } 4066 } 4067 4068 /** 4069 * Control whether this activity's main window is visible. This is intended 4070 * only for the special case of an activity that is not going to show a 4071 * UI itself, but can't just finish prior to onResume() because it needs 4072 * to wait for a service binding or such. Setting this to false allows 4073 * you to prevent your UI from being shown during that time. 4074 * 4075 * <p>The default value for this is taken from the 4076 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 4077 */ 4078 public void setVisible(boolean visible) { 4079 if (mVisibleFromClient != visible) { 4080 mVisibleFromClient = visible; 4081 if (mVisibleFromServer) { 4082 if (visible) makeVisible(); 4083 else mDecor.setVisibility(View.INVISIBLE); 4084 } 4085 } 4086 } 4087 4088 void makeVisible() { 4089 if (!mWindowAdded) { 4090 ViewManager wm = getWindowManager(); 4091 wm.addView(mDecor, getWindow().getAttributes()); 4092 mWindowAdded = true; 4093 } 4094 mDecor.setVisibility(View.VISIBLE); 4095 } 4096 4097 /** 4098 * Check to see whether this activity is in the process of finishing, 4099 * either because you called {@link #finish} on it or someone else 4100 * has requested that it finished. This is often used in 4101 * {@link #onPause} to determine whether the activity is simply pausing or 4102 * completely finishing. 4103 * 4104 * @return If the activity is finishing, returns true; else returns false. 4105 * 4106 * @see #finish 4107 */ 4108 public boolean isFinishing() { 4109 return mFinished; 4110 } 4111 4112 /** 4113 * Returns true if the final {@link #onDestroy()} call has been made 4114 * on the Activity, so this instance is now dead. 4115 */ 4116 public boolean isDestroyed() { 4117 return mDestroyed; 4118 } 4119 4120 /** 4121 * Check to see whether this activity is in the process of being destroyed in order to be 4122 * recreated with a new configuration. This is often used in 4123 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 4124 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 4125 * 4126 * @return If the activity is being torn down in order to be recreated with a new configuration, 4127 * returns true; else returns false. 4128 */ 4129 public boolean isChangingConfigurations() { 4130 return mChangingConfigurations; 4131 } 4132 4133 /** 4134 * Cause this Activity to be recreated with a new instance. This results 4135 * in essentially the same flow as when the Activity is created due to 4136 * a configuration change -- the current instance will go through its 4137 * lifecycle to {@link #onDestroy} and a new instance then created after it. 4138 */ 4139 public void recreate() { 4140 if (mParent != null) { 4141 throw new IllegalStateException("Can only be called on top-level activity"); 4142 } 4143 if (Looper.myLooper() != mMainThread.getLooper()) { 4144 throw new IllegalStateException("Must be called from main thread"); 4145 } 4146 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, false); 4147 } 4148 4149 /** 4150 * Call this when your activity is done and should be closed. The 4151 * ActivityResult is propagated back to whoever launched you via 4152 * onActivityResult(). 4153 */ 4154 public void finish() { 4155 if (mParent == null) { 4156 int resultCode; 4157 Intent resultData; 4158 synchronized (this) { 4159 resultCode = mResultCode; 4160 resultData = mResultData; 4161 } 4162 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 4163 try { 4164 if (resultData != null) { 4165 resultData.setAllowFds(false); 4166 } 4167 if (ActivityManagerNative.getDefault() 4168 .finishActivity(mToken, resultCode, resultData)) { 4169 mFinished = true; 4170 } 4171 } catch (RemoteException e) { 4172 // Empty 4173 } 4174 } else { 4175 mParent.finishFromChild(this); 4176 } 4177 } 4178 4179 /** 4180 * Finish this activity as well as all activities immediately below it 4181 * in the current task that have the same affinity. This is typically 4182 * used when an application can be launched on to another task (such as 4183 * from an ACTION_VIEW of a content type it understands) and the user 4184 * has used the up navigation to switch out of the current task and in 4185 * to its own task. In this case, if the user has navigated down into 4186 * any other activities of the second application, all of those should 4187 * be removed from the original task as part of the task switch. 4188 * 4189 * <p>Note that this finish does <em>not</em> allow you to deliver results 4190 * to the previous activity, and an exception will be thrown if you are trying 4191 * to do so.</p> 4192 */ 4193 public void finishAffinity() { 4194 if (mParent != null) { 4195 throw new IllegalStateException("Can not be called from an embedded activity"); 4196 } 4197 if (mResultCode != RESULT_CANCELED || mResultData != null) { 4198 throw new IllegalStateException("Can not be called to deliver a result"); 4199 } 4200 try { 4201 if (ActivityManagerNative.getDefault().finishActivityAffinity(mToken)) { 4202 mFinished = true; 4203 } 4204 } catch (RemoteException e) { 4205 // Empty 4206 } 4207 } 4208 4209 /** 4210 * This is called when a child activity of this one calls its 4211 * {@link #finish} method. The default implementation simply calls 4212 * finish() on this activity (the parent), finishing the entire group. 4213 * 4214 * @param child The activity making the call. 4215 * 4216 * @see #finish 4217 */ 4218 public void finishFromChild(Activity child) { 4219 finish(); 4220 } 4221 4222 /** 4223 * Force finish another activity that you had previously started with 4224 * {@link #startActivityForResult}. 4225 * 4226 * @param requestCode The request code of the activity that you had 4227 * given to startActivityForResult(). If there are multiple 4228 * activities started with this request code, they 4229 * will all be finished. 4230 */ 4231 public void finishActivity(int requestCode) { 4232 if (mParent == null) { 4233 try { 4234 ActivityManagerNative.getDefault() 4235 .finishSubActivity(mToken, mEmbeddedID, requestCode); 4236 } catch (RemoteException e) { 4237 // Empty 4238 } 4239 } else { 4240 mParent.finishActivityFromChild(this, requestCode); 4241 } 4242 } 4243 4244 /** 4245 * This is called when a child activity of this one calls its 4246 * finishActivity(). 4247 * 4248 * @param child The activity making the call. 4249 * @param requestCode Request code that had been used to start the 4250 * activity. 4251 */ 4252 public void finishActivityFromChild(Activity child, int requestCode) { 4253 try { 4254 ActivityManagerNative.getDefault() 4255 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 4256 } catch (RemoteException e) { 4257 // Empty 4258 } 4259 } 4260 4261 /** 4262 * Called when an activity you launched exits, giving you the requestCode 4263 * you started it with, the resultCode it returned, and any additional 4264 * data from it. The <var>resultCode</var> will be 4265 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 4266 * didn't return any result, or crashed during its operation. 4267 * 4268 * <p>You will receive this call immediately before onResume() when your 4269 * activity is re-starting. 4270 * 4271 * @param requestCode The integer request code originally supplied to 4272 * startActivityForResult(), allowing you to identify who this 4273 * result came from. 4274 * @param resultCode The integer result code returned by the child activity 4275 * through its setResult(). 4276 * @param data An Intent, which can return result data to the caller 4277 * (various data can be attached to Intent "extras"). 4278 * 4279 * @see #startActivityForResult 4280 * @see #createPendingResult 4281 * @see #setResult(int) 4282 */ 4283 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 4284 } 4285 4286 /** 4287 * Create a new PendingIntent object which you can hand to others 4288 * for them to use to send result data back to your 4289 * {@link #onActivityResult} callback. The created object will be either 4290 * one-shot (becoming invalid after a result is sent back) or multiple 4291 * (allowing any number of results to be sent through it). 4292 * 4293 * @param requestCode Private request code for the sender that will be 4294 * associated with the result data when it is returned. The sender can not 4295 * modify this value, allowing you to identify incoming results. 4296 * @param data Default data to supply in the result, which may be modified 4297 * by the sender. 4298 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 4299 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 4300 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 4301 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 4302 * or any of the flags as supported by 4303 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 4304 * of the intent that can be supplied when the actual send happens. 4305 * 4306 * @return Returns an existing or new PendingIntent matching the given 4307 * parameters. May return null only if 4308 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 4309 * supplied. 4310 * 4311 * @see PendingIntent 4312 */ 4313 public PendingIntent createPendingResult(int requestCode, Intent data, 4314 int flags) { 4315 String packageName = getPackageName(); 4316 try { 4317 data.setAllowFds(false); 4318 IIntentSender target = 4319 ActivityManagerNative.getDefault().getIntentSender( 4320 ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 4321 mParent == null ? mToken : mParent.mToken, 4322 mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null, 4323 UserHandle.myUserId()); 4324 return target != null ? new PendingIntent(target) : null; 4325 } catch (RemoteException e) { 4326 // Empty 4327 } 4328 return null; 4329 } 4330 4331 /** 4332 * Change the desired orientation of this activity. If the activity 4333 * is currently in the foreground or otherwise impacting the screen 4334 * orientation, the screen will immediately be changed (possibly causing 4335 * the activity to be restarted). Otherwise, this will be used the next 4336 * time the activity is visible. 4337 * 4338 * @param requestedOrientation An orientation constant as used in 4339 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 4340 */ 4341 public void setRequestedOrientation(int requestedOrientation) { 4342 if (mParent == null) { 4343 try { 4344 ActivityManagerNative.getDefault().setRequestedOrientation( 4345 mToken, requestedOrientation); 4346 } catch (RemoteException e) { 4347 // Empty 4348 } 4349 } else { 4350 mParent.setRequestedOrientation(requestedOrientation); 4351 } 4352 } 4353 4354 /** 4355 * Return the current requested orientation of the activity. This will 4356 * either be the orientation requested in its component's manifest, or 4357 * the last requested orientation given to 4358 * {@link #setRequestedOrientation(int)}. 4359 * 4360 * @return Returns an orientation constant as used in 4361 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 4362 */ 4363 public int getRequestedOrientation() { 4364 if (mParent == null) { 4365 try { 4366 return ActivityManagerNative.getDefault() 4367 .getRequestedOrientation(mToken); 4368 } catch (RemoteException e) { 4369 // Empty 4370 } 4371 } else { 4372 return mParent.getRequestedOrientation(); 4373 } 4374 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 4375 } 4376 4377 /** 4378 * Return the identifier of the task this activity is in. This identifier 4379 * will remain the same for the lifetime of the activity. 4380 * 4381 * @return Task identifier, an opaque integer. 4382 */ 4383 public int getTaskId() { 4384 try { 4385 return ActivityManagerNative.getDefault() 4386 .getTaskForActivity(mToken, false); 4387 } catch (RemoteException e) { 4388 return -1; 4389 } 4390 } 4391 4392 /** 4393 * Return whether this activity is the root of a task. The root is the 4394 * first activity in a task. 4395 * 4396 * @return True if this is the root activity, else false. 4397 */ 4398 public boolean isTaskRoot() { 4399 try { 4400 return ActivityManagerNative.getDefault() 4401 .getTaskForActivity(mToken, true) >= 0; 4402 } catch (RemoteException e) { 4403 return false; 4404 } 4405 } 4406 4407 /** 4408 * Move the task containing this activity to the back of the activity 4409 * stack. The activity's order within the task is unchanged. 4410 * 4411 * @param nonRoot If false then this only works if the activity is the root 4412 * of a task; if true it will work for any activity in 4413 * a task. 4414 * 4415 * @return If the task was moved (or it was already at the 4416 * back) true is returned, else false. 4417 */ 4418 public boolean moveTaskToBack(boolean nonRoot) { 4419 try { 4420 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 4421 mToken, nonRoot); 4422 } catch (RemoteException e) { 4423 // Empty 4424 } 4425 return false; 4426 } 4427 4428 /** 4429 * Returns class name for this activity with the package prefix removed. 4430 * This is the default name used to read and write settings. 4431 * 4432 * @return The local class name. 4433 */ 4434 public String getLocalClassName() { 4435 final String pkg = getPackageName(); 4436 final String cls = mComponent.getClassName(); 4437 int packageLen = pkg.length(); 4438 if (!cls.startsWith(pkg) || cls.length() <= packageLen 4439 || cls.charAt(packageLen) != '.') { 4440 return cls; 4441 } 4442 return cls.substring(packageLen+1); 4443 } 4444 4445 /** 4446 * Returns complete component name of this activity. 4447 * 4448 * @return Returns the complete component name for this activity 4449 */ 4450 public ComponentName getComponentName() 4451 { 4452 return mComponent; 4453 } 4454 4455 /** 4456 * Retrieve a {@link SharedPreferences} object for accessing preferences 4457 * that are private to this activity. This simply calls the underlying 4458 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 4459 * class name as the preferences name. 4460 * 4461 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 4462 * operation, {@link #MODE_WORLD_READABLE} and 4463 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 4464 * 4465 * @return Returns the single SharedPreferences instance that can be used 4466 * to retrieve and modify the preference values. 4467 */ 4468 public SharedPreferences getPreferences(int mode) { 4469 return getSharedPreferences(getLocalClassName(), mode); 4470 } 4471 4472 private void ensureSearchManager() { 4473 if (mSearchManager != null) { 4474 return; 4475 } 4476 4477 mSearchManager = new SearchManager(this, null); 4478 } 4479 4480 @Override 4481 public Object getSystemService(String name) { 4482 if (getBaseContext() == null) { 4483 throw new IllegalStateException( 4484 "System services not available to Activities before onCreate()"); 4485 } 4486 4487 if (WINDOW_SERVICE.equals(name)) { 4488 return mWindowManager; 4489 } else if (SEARCH_SERVICE.equals(name)) { 4490 ensureSearchManager(); 4491 return mSearchManager; 4492 } 4493 return super.getSystemService(name); 4494 } 4495 4496 /** 4497 * Change the title associated with this activity. If this is a 4498 * top-level activity, the title for its window will change. If it 4499 * is an embedded activity, the parent can do whatever it wants 4500 * with it. 4501 */ 4502 public void setTitle(CharSequence title) { 4503 mTitle = title; 4504 onTitleChanged(title, mTitleColor); 4505 4506 if (mParent != null) { 4507 mParent.onChildTitleChanged(this, title); 4508 } 4509 } 4510 4511 /** 4512 * Change the title associated with this activity. If this is a 4513 * top-level activity, the title for its window will change. If it 4514 * is an embedded activity, the parent can do whatever it wants 4515 * with it. 4516 */ 4517 public void setTitle(int titleId) { 4518 setTitle(getText(titleId)); 4519 } 4520 4521 public void setTitleColor(int textColor) { 4522 mTitleColor = textColor; 4523 onTitleChanged(mTitle, textColor); 4524 } 4525 4526 public final CharSequence getTitle() { 4527 return mTitle; 4528 } 4529 4530 public final int getTitleColor() { 4531 return mTitleColor; 4532 } 4533 4534 protected void onTitleChanged(CharSequence title, int color) { 4535 if (mTitleReady) { 4536 final Window win = getWindow(); 4537 if (win != null) { 4538 win.setTitle(title); 4539 if (color != 0) { 4540 win.setTitleColor(color); 4541 } 4542 } 4543 } 4544 } 4545 4546 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 4547 } 4548 4549 /** 4550 * Sets the visibility of the progress bar in the title. 4551 * <p> 4552 * In order for the progress bar to be shown, the feature must be requested 4553 * via {@link #requestWindowFeature(int)}. 4554 * 4555 * @param visible Whether to show the progress bars in the title. 4556 */ 4557 public final void setProgressBarVisibility(boolean visible) { 4558 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 4559 Window.PROGRESS_VISIBILITY_OFF); 4560 } 4561 4562 /** 4563 * Sets the visibility of the indeterminate progress bar in the title. 4564 * <p> 4565 * In order for the progress bar to be shown, the feature must be requested 4566 * via {@link #requestWindowFeature(int)}. 4567 * 4568 * @param visible Whether to show the progress bars in the title. 4569 */ 4570 public final void setProgressBarIndeterminateVisibility(boolean visible) { 4571 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 4572 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 4573 } 4574 4575 /** 4576 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 4577 * is always indeterminate). 4578 * <p> 4579 * In order for the progress bar to be shown, the feature must be requested 4580 * via {@link #requestWindowFeature(int)}. 4581 * 4582 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 4583 */ 4584 public final void setProgressBarIndeterminate(boolean indeterminate) { 4585 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4586 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 4587 } 4588 4589 /** 4590 * Sets the progress for the progress bars in the title. 4591 * <p> 4592 * In order for the progress bar to be shown, the feature must be requested 4593 * via {@link #requestWindowFeature(int)}. 4594 * 4595 * @param progress The progress for the progress bar. Valid ranges are from 4596 * 0 to 10000 (both inclusive). If 10000 is given, the progress 4597 * bar will be completely filled and will fade out. 4598 */ 4599 public final void setProgress(int progress) { 4600 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 4601 } 4602 4603 /** 4604 * Sets the secondary progress for the progress bar in the title. This 4605 * progress is drawn between the primary progress (set via 4606 * {@link #setProgress(int)} and the background. It can be ideal for media 4607 * scenarios such as showing the buffering progress while the default 4608 * progress shows the play progress. 4609 * <p> 4610 * In order for the progress bar to be shown, the feature must be requested 4611 * via {@link #requestWindowFeature(int)}. 4612 * 4613 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 4614 * 0 to 10000 (both inclusive). 4615 */ 4616 public final void setSecondaryProgress(int secondaryProgress) { 4617 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4618 secondaryProgress + Window.PROGRESS_SECONDARY_START); 4619 } 4620 4621 /** 4622 * Suggests an audio stream whose volume should be changed by the hardware 4623 * volume controls. 4624 * <p> 4625 * The suggested audio stream will be tied to the window of this Activity. 4626 * If the Activity is switched, the stream set here is no longer the 4627 * suggested stream. The client does not need to save and restore the old 4628 * suggested stream value in onPause and onResume. 4629 * 4630 * @param streamType The type of the audio stream whose volume should be 4631 * changed by the hardware volume controls. It is not guaranteed that 4632 * the hardware volume controls will always change this stream's 4633 * volume (for example, if a call is in progress, its stream's volume 4634 * may be changed instead). To reset back to the default, use 4635 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 4636 */ 4637 public final void setVolumeControlStream(int streamType) { 4638 getWindow().setVolumeControlStream(streamType); 4639 } 4640 4641 /** 4642 * Gets the suggested audio stream whose volume should be changed by the 4643 * harwdare volume controls. 4644 * 4645 * @return The suggested audio stream type whose volume should be changed by 4646 * the hardware volume controls. 4647 * @see #setVolumeControlStream(int) 4648 */ 4649 public final int getVolumeControlStream() { 4650 return getWindow().getVolumeControlStream(); 4651 } 4652 4653 /** 4654 * Runs the specified action on the UI thread. If the current thread is the UI 4655 * thread, then the action is executed immediately. If the current thread is 4656 * not the UI thread, the action is posted to the event queue of the UI thread. 4657 * 4658 * @param action the action to run on the UI thread 4659 */ 4660 public final void runOnUiThread(Runnable action) { 4661 if (Thread.currentThread() != mUiThread) { 4662 mHandler.post(action); 4663 } else { 4664 action.run(); 4665 } 4666 } 4667 4668 /** 4669 * Standard implementation of 4670 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 4671 * inflating with the LayoutInflater returned by {@link #getSystemService}. 4672 * This implementation does nothing and is for 4673 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 4674 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 4675 * 4676 * @see android.view.LayoutInflater#createView 4677 * @see android.view.Window#getLayoutInflater 4678 */ 4679 public View onCreateView(String name, Context context, AttributeSet attrs) { 4680 return null; 4681 } 4682 4683 /** 4684 * Standard implementation of 4685 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 4686 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 4687 * This implementation handles <fragment> tags to embed fragments inside 4688 * of the activity. 4689 * 4690 * @see android.view.LayoutInflater#createView 4691 * @see android.view.Window#getLayoutInflater 4692 */ 4693 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 4694 if (!"fragment".equals(name)) { 4695 return onCreateView(name, context, attrs); 4696 } 4697 4698 String fname = attrs.getAttributeValue(null, "class"); 4699 TypedArray a = 4700 context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Fragment); 4701 if (fname == null) { 4702 fname = a.getString(com.android.internal.R.styleable.Fragment_name); 4703 } 4704 int id = a.getResourceId(com.android.internal.R.styleable.Fragment_id, View.NO_ID); 4705 String tag = a.getString(com.android.internal.R.styleable.Fragment_tag); 4706 a.recycle(); 4707 4708 int containerId = parent != null ? parent.getId() : 0; 4709 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 4710 throw new IllegalArgumentException(attrs.getPositionDescription() 4711 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 4712 } 4713 4714 // If we restored from a previous state, we may already have 4715 // instantiated this fragment from the state and should use 4716 // that instance instead of making a new one. 4717 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 4718 if (fragment == null && tag != null) { 4719 fragment = mFragments.findFragmentByTag(tag); 4720 } 4721 if (fragment == null && containerId != View.NO_ID) { 4722 fragment = mFragments.findFragmentById(containerId); 4723 } 4724 4725 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 4726 + Integer.toHexString(id) + " fname=" + fname 4727 + " existing=" + fragment); 4728 if (fragment == null) { 4729 fragment = Fragment.instantiate(this, fname); 4730 fragment.mFromLayout = true; 4731 fragment.mFragmentId = id != 0 ? id : containerId; 4732 fragment.mContainerId = containerId; 4733 fragment.mTag = tag; 4734 fragment.mInLayout = true; 4735 fragment.mFragmentManager = mFragments; 4736 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4737 mFragments.addFragment(fragment, true); 4738 4739 } else if (fragment.mInLayout) { 4740 // A fragment already exists and it is not one we restored from 4741 // previous state. 4742 throw new IllegalArgumentException(attrs.getPositionDescription() 4743 + ": Duplicate id 0x" + Integer.toHexString(id) 4744 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 4745 + " with another fragment for " + fname); 4746 } else { 4747 // This fragment was retained from a previous instance; get it 4748 // going now. 4749 fragment.mInLayout = true; 4750 // If this fragment is newly instantiated (either right now, or 4751 // from last saved state), then give it the attributes to 4752 // initialize itself. 4753 if (!fragment.mRetaining) { 4754 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4755 } 4756 mFragments.moveToState(fragment); 4757 } 4758 4759 if (fragment.mView == null) { 4760 throw new IllegalStateException("Fragment " + fname 4761 + " did not create a view."); 4762 } 4763 if (id != 0) { 4764 fragment.mView.setId(id); 4765 } 4766 if (fragment.mView.getTag() == null) { 4767 fragment.mView.setTag(tag); 4768 } 4769 return fragment.mView; 4770 } 4771 4772 /** 4773 * Print the Activity's state into the given stream. This gets invoked if 4774 * you run "adb shell dumpsys activity <activity_component_name>". 4775 * 4776 * @param prefix Desired prefix to prepend at each line of output. 4777 * @param fd The raw file descriptor that the dump is being sent to. 4778 * @param writer The PrintWriter to which you should dump your state. This will be 4779 * closed for you after you return. 4780 * @param args additional arguments to the dump request. 4781 */ 4782 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4783 dumpInner(prefix, fd, writer, args); 4784 } 4785 4786 void dumpInner(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4787 writer.print(prefix); writer.print("Local Activity "); 4788 writer.print(Integer.toHexString(System.identityHashCode(this))); 4789 writer.println(" State:"); 4790 String innerPrefix = prefix + " "; 4791 writer.print(innerPrefix); writer.print("mResumed="); 4792 writer.print(mResumed); writer.print(" mStopped="); 4793 writer.print(mStopped); writer.print(" mFinished="); 4794 writer.println(mFinished); 4795 writer.print(innerPrefix); writer.print("mLoadersStarted="); 4796 writer.println(mLoadersStarted); 4797 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 4798 writer.println(mChangingConfigurations); 4799 writer.print(innerPrefix); writer.print("mCurrentConfig="); 4800 writer.println(mCurrentConfig); 4801 if (mLoaderManager != null) { 4802 writer.print(prefix); writer.print("Loader Manager "); 4803 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 4804 writer.println(":"); 4805 mLoaderManager.dump(prefix + " ", fd, writer, args); 4806 } 4807 mFragments.dump(prefix, fd, writer, args); 4808 writer.print(prefix); writer.println("View Hierarchy:"); 4809 dumpViewHierarchy(prefix + " ", writer, getWindow().getDecorView()); 4810 } 4811 4812 private void dumpViewHierarchy(String prefix, PrintWriter writer, View view) { 4813 writer.print(prefix); 4814 if (view == null) { 4815 writer.println("null"); 4816 return; 4817 } 4818 writer.println(view.toString()); 4819 if (!(view instanceof ViewGroup)) { 4820 return; 4821 } 4822 ViewGroup grp = (ViewGroup)view; 4823 final int N = grp.getChildCount(); 4824 if (N <= 0) { 4825 return; 4826 } 4827 prefix = prefix + " "; 4828 for (int i=0; i<N; i++) { 4829 dumpViewHierarchy(prefix, writer, grp.getChildAt(i)); 4830 } 4831 } 4832 4833 /** 4834 * Bit indicating that this activity is "immersive" and should not be 4835 * interrupted by notifications if possible. 4836 * 4837 * This value is initially set by the manifest property 4838 * <code>android:immersive</code> but may be changed at runtime by 4839 * {@link #setImmersive}. 4840 * 4841 * @see #setImmersive(boolean) 4842 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4843 */ 4844 public boolean isImmersive() { 4845 try { 4846 return ActivityManagerNative.getDefault().isImmersive(mToken); 4847 } catch (RemoteException e) { 4848 return false; 4849 } 4850 } 4851 4852 /** 4853 * Adjust the current immersive mode setting. 4854 * 4855 * Note that changing this value will have no effect on the activity's 4856 * {@link android.content.pm.ActivityInfo} structure; that is, if 4857 * <code>android:immersive</code> is set to <code>true</code> 4858 * in the application's manifest entry for this activity, the {@link 4859 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 4860 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4861 * FLAG_IMMERSIVE} bit set. 4862 * 4863 * @see #isImmersive() 4864 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4865 */ 4866 public void setImmersive(boolean i) { 4867 try { 4868 ActivityManagerNative.getDefault().setImmersive(mToken, i); 4869 } catch (RemoteException e) { 4870 // pass 4871 } 4872 } 4873 4874 /** 4875 * Start an action mode. 4876 * 4877 * @param callback Callback that will manage lifecycle events for this context mode 4878 * @return The ContextMode that was started, or null if it was canceled 4879 * 4880 * @see ActionMode 4881 */ 4882 public ActionMode startActionMode(ActionMode.Callback callback) { 4883 return mWindow.getDecorView().startActionMode(callback); 4884 } 4885 4886 /** 4887 * Give the Activity a chance to control the UI for an action mode requested 4888 * by the system. 4889 * 4890 * <p>Note: If you are looking for a notification callback that an action mode 4891 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 4892 * 4893 * @param callback The callback that should control the new action mode 4894 * @return The new action mode, or <code>null</code> if the activity does not want to 4895 * provide special handling for this action mode. (It will be handled by the system.) 4896 */ 4897 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 4898 initActionBar(); 4899 if (mActionBar != null) { 4900 return mActionBar.startActionMode(callback); 4901 } 4902 return null; 4903 } 4904 4905 /** 4906 * Notifies the Activity that an action mode has been started. 4907 * Activity subclasses overriding this method should call the superclass implementation. 4908 * 4909 * @param mode The new action mode. 4910 */ 4911 public void onActionModeStarted(ActionMode mode) { 4912 } 4913 4914 /** 4915 * Notifies the activity that an action mode has finished. 4916 * Activity subclasses overriding this method should call the superclass implementation. 4917 * 4918 * @param mode The action mode that just finished. 4919 */ 4920 public void onActionModeFinished(ActionMode mode) { 4921 } 4922 4923 /** 4924 * Returns true if the app should recreate the task when navigating 'up' from this activity 4925 * by using targetIntent. 4926 * 4927 * <p>If this method returns false the app can trivially call 4928 * {@link #navigateUpTo(Intent)} using the same parameters to correctly perform 4929 * up navigation. If this method returns false, the app should synthesize a new task stack 4930 * by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation.</p> 4931 * 4932 * @param targetIntent An intent representing the target destination for up navigation 4933 * @return true if navigating up should recreate a new task stack, false if the same task 4934 * should be used for the destination 4935 */ 4936 public boolean shouldUpRecreateTask(Intent targetIntent) { 4937 try { 4938 PackageManager pm = getPackageManager(); 4939 ComponentName cn = targetIntent.getComponent(); 4940 if (cn == null) { 4941 cn = targetIntent.resolveActivity(pm); 4942 } 4943 ActivityInfo info = pm.getActivityInfo(cn, 0); 4944 if (info.taskAffinity == null) { 4945 return false; 4946 } 4947 return !ActivityManagerNative.getDefault() 4948 .targetTaskAffinityMatchesActivity(mToken, info.taskAffinity); 4949 } catch (RemoteException e) { 4950 return false; 4951 } catch (NameNotFoundException e) { 4952 return false; 4953 } 4954 } 4955 4956 /** 4957 * Navigate from this activity to the activity specified by upIntent, finishing this activity 4958 * in the process. If the activity indicated by upIntent already exists in the task's history, 4959 * this activity and all others before the indicated activity in the history stack will be 4960 * finished. 4961 * 4962 * <p>If the indicated activity does not appear in the history stack, this will finish 4963 * each activity in this task until the root activity of the task is reached, resulting in 4964 * an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy 4965 * when an activity may be reached by a path not passing through a canonical parent 4966 * activity.</p> 4967 * 4968 * <p>This method should be used when performing up navigation from within the same task 4969 * as the destination. If up navigation should cross tasks in some cases, see 4970 * {@link #shouldUpRecreateTask(Intent)}.</p> 4971 * 4972 * @param upIntent An intent representing the target destination for up navigation 4973 * 4974 * @return true if up navigation successfully reached the activity indicated by upIntent and 4975 * upIntent was delivered to it. false if an instance of the indicated activity could 4976 * not be found and this activity was simply finished normally. 4977 */ 4978 public boolean navigateUpTo(Intent upIntent) { 4979 if (mParent == null) { 4980 ComponentName destInfo = upIntent.getComponent(); 4981 if (destInfo == null) { 4982 destInfo = upIntent.resolveActivity(getPackageManager()); 4983 if (destInfo == null) { 4984 return false; 4985 } 4986 upIntent = new Intent(upIntent); 4987 upIntent.setComponent(destInfo); 4988 } 4989 int resultCode; 4990 Intent resultData; 4991 synchronized (this) { 4992 resultCode = mResultCode; 4993 resultData = mResultData; 4994 } 4995 if (resultData != null) { 4996 resultData.setAllowFds(false); 4997 } 4998 try { 4999 return ActivityManagerNative.getDefault().navigateUpTo(mToken, upIntent, 5000 resultCode, resultData); 5001 } catch (RemoteException e) { 5002 return false; 5003 } 5004 } else { 5005 return mParent.navigateUpToFromChild(this, upIntent); 5006 } 5007 } 5008 5009 /** 5010 * This is called when a child activity of this one calls its 5011 * {@link #navigateUpTo} method. The default implementation simply calls 5012 * navigateUpTo(upIntent) on this activity (the parent). 5013 * 5014 * @param child The activity making the call. 5015 * @param upIntent An intent representing the target destination for up navigation 5016 * 5017 * @return true if up navigation successfully reached the activity indicated by upIntent and 5018 * upIntent was delivered to it. false if an instance of the indicated activity could 5019 * not be found and this activity was simply finished normally. 5020 */ 5021 public boolean navigateUpToFromChild(Activity child, Intent upIntent) { 5022 return navigateUpTo(upIntent); 5023 } 5024 5025 /** 5026 * Obtain an {@link Intent} that will launch an explicit target activity specified by 5027 * this activity's logical parent. The logical parent is named in the application's manifest 5028 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute. 5029 * Activity subclasses may override this method to modify the Intent returned by 5030 * super.getParentActivityIntent() or to implement a different mechanism of retrieving 5031 * the parent intent entirely. 5032 * 5033 * @return a new Intent targeting the defined parent of this activity or null if 5034 * there is no valid parent. 5035 */ 5036 public Intent getParentActivityIntent() { 5037 final String parentName = mActivityInfo.parentActivityName; 5038 if (TextUtils.isEmpty(parentName)) { 5039 return null; 5040 } 5041 5042 // If the parent itself has no parent, generate a main activity intent. 5043 final ComponentName target = new ComponentName(this, parentName); 5044 try { 5045 final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0); 5046 final String parentActivity = parentInfo.parentActivityName; 5047 final Intent parentIntent = parentActivity == null 5048 ? Intent.makeMainActivity(target) 5049 : new Intent().setComponent(target); 5050 return parentIntent; 5051 } catch (NameNotFoundException e) { 5052 Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName + 5053 "' in manifest"); 5054 return null; 5055 } 5056 } 5057 5058 // ------------------ Internal API ------------------ 5059 5060 final void setParent(Activity parent) { 5061 mParent = parent; 5062 } 5063 5064 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 5065 Application application, Intent intent, ActivityInfo info, CharSequence title, 5066 Activity parent, String id, NonConfigurationInstances lastNonConfigurationInstances, 5067 Configuration config) { 5068 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 5069 lastNonConfigurationInstances, config); 5070 } 5071 5072 final void attach(Context context, ActivityThread aThread, 5073 Instrumentation instr, IBinder token, int ident, 5074 Application application, Intent intent, ActivityInfo info, 5075 CharSequence title, Activity parent, String id, 5076 NonConfigurationInstances lastNonConfigurationInstances, 5077 Configuration config) { 5078 attachBaseContext(context); 5079 5080 mFragments.attachActivity(this, mContainer, null); 5081 5082 mWindow = PolicyManager.makeNewWindow(this); 5083 mWindow.setCallback(this); 5084 mWindow.getLayoutInflater().setPrivateFactory(this); 5085 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 5086 mWindow.setSoftInputMode(info.softInputMode); 5087 } 5088 if (info.uiOptions != 0) { 5089 mWindow.setUiOptions(info.uiOptions); 5090 } 5091 mUiThread = Thread.currentThread(); 5092 5093 mMainThread = aThread; 5094 mInstrumentation = instr; 5095 mToken = token; 5096 mIdent = ident; 5097 mApplication = application; 5098 mIntent = intent; 5099 mComponent = intent.getComponent(); 5100 mActivityInfo = info; 5101 mTitle = title; 5102 mParent = parent; 5103 mEmbeddedID = id; 5104 mLastNonConfigurationInstances = lastNonConfigurationInstances; 5105 5106 mWindow.setWindowManager( 5107 (WindowManager)context.getSystemService(Context.WINDOW_SERVICE), 5108 mToken, mComponent.flattenToString(), 5109 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 5110 if (mParent != null) { 5111 mWindow.setContainer(mParent.getWindow()); 5112 } 5113 mWindowManager = mWindow.getWindowManager(); 5114 mCurrentConfig = config; 5115 } 5116 5117 /** @hide */ 5118 public final IBinder getActivityToken() { 5119 return mParent != null ? mParent.getActivityToken() : mToken; 5120 } 5121 5122 final void performCreate(Bundle icicle) { 5123 onCreate(icicle); 5124 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 5125 com.android.internal.R.styleable.Window_windowNoDisplay, false); 5126 mFragments.dispatchActivityCreated(); 5127 } 5128 5129 final void performStart() { 5130 mFragments.noteStateNotSaved(); 5131 mCalled = false; 5132 mFragments.execPendingActions(); 5133 mInstrumentation.callActivityOnStart(this); 5134 if (!mCalled) { 5135 throw new SuperNotCalledException( 5136 "Activity " + mComponent.toShortString() + 5137 " did not call through to super.onStart()"); 5138 } 5139 mFragments.dispatchStart(); 5140 if (mAllLoaderManagers != null) { 5141 LoaderManagerImpl loaders[] = new LoaderManagerImpl[mAllLoaderManagers.size()]; 5142 mAllLoaderManagers.values().toArray(loaders); 5143 if (loaders != null) { 5144 for (int i=0; i<loaders.length; i++) { 5145 LoaderManagerImpl lm = loaders[i]; 5146 lm.finishRetain(); 5147 lm.doReportStart(); 5148 } 5149 } 5150 } 5151 } 5152 5153 final void performRestart() { 5154 mFragments.noteStateNotSaved(); 5155 5156 if (mStopped) { 5157 mStopped = false; 5158 if (mToken != null && mParent == null) { 5159 WindowManagerGlobal.getInstance().setStoppedState(mToken, false); 5160 } 5161 5162 synchronized (mManagedCursors) { 5163 final int N = mManagedCursors.size(); 5164 for (int i=0; i<N; i++) { 5165 ManagedCursor mc = mManagedCursors.get(i); 5166 if (mc.mReleased || mc.mUpdated) { 5167 if (!mc.mCursor.requery()) { 5168 if (getApplicationInfo().targetSdkVersion 5169 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 5170 throw new IllegalStateException( 5171 "trying to requery an already closed cursor " 5172 + mc.mCursor); 5173 } 5174 } 5175 mc.mReleased = false; 5176 mc.mUpdated = false; 5177 } 5178 } 5179 } 5180 5181 mCalled = false; 5182 mInstrumentation.callActivityOnRestart(this); 5183 if (!mCalled) { 5184 throw new SuperNotCalledException( 5185 "Activity " + mComponent.toShortString() + 5186 " did not call through to super.onRestart()"); 5187 } 5188 performStart(); 5189 } 5190 } 5191 5192 final void performResume() { 5193 performRestart(); 5194 5195 mFragments.execPendingActions(); 5196 5197 mLastNonConfigurationInstances = null; 5198 5199 mCalled = false; 5200 // mResumed is set by the instrumentation 5201 mInstrumentation.callActivityOnResume(this); 5202 if (!mCalled) { 5203 throw new SuperNotCalledException( 5204 "Activity " + mComponent.toShortString() + 5205 " did not call through to super.onResume()"); 5206 } 5207 5208 // Now really resume, and install the current status bar and menu. 5209 mCalled = false; 5210 5211 mFragments.dispatchResume(); 5212 mFragments.execPendingActions(); 5213 5214 onPostResume(); 5215 if (!mCalled) { 5216 throw new SuperNotCalledException( 5217 "Activity " + mComponent.toShortString() + 5218 " did not call through to super.onPostResume()"); 5219 } 5220 } 5221 5222 final void performPause() { 5223 mFragments.dispatchPause(); 5224 mCalled = false; 5225 onPause(); 5226 mResumed = false; 5227 if (!mCalled && getApplicationInfo().targetSdkVersion 5228 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 5229 throw new SuperNotCalledException( 5230 "Activity " + mComponent.toShortString() + 5231 " did not call through to super.onPause()"); 5232 } 5233 mResumed = false; 5234 } 5235 5236 final void performUserLeaving() { 5237 onUserInteraction(); 5238 onUserLeaveHint(); 5239 } 5240 5241 final void performStop() { 5242 if (mLoadersStarted) { 5243 mLoadersStarted = false; 5244 if (mLoaderManager != null) { 5245 if (!mChangingConfigurations) { 5246 mLoaderManager.doStop(); 5247 } else { 5248 mLoaderManager.doRetain(); 5249 } 5250 } 5251 } 5252 5253 if (!mStopped) { 5254 if (mWindow != null) { 5255 mWindow.closeAllPanels(); 5256 } 5257 5258 if (mToken != null && mParent == null) { 5259 WindowManagerGlobal.getInstance().setStoppedState(mToken, true); 5260 } 5261 5262 mFragments.dispatchStop(); 5263 5264 mCalled = false; 5265 mInstrumentation.callActivityOnStop(this); 5266 if (!mCalled) { 5267 throw new SuperNotCalledException( 5268 "Activity " + mComponent.toShortString() + 5269 " did not call through to super.onStop()"); 5270 } 5271 5272 synchronized (mManagedCursors) { 5273 final int N = mManagedCursors.size(); 5274 for (int i=0; i<N; i++) { 5275 ManagedCursor mc = mManagedCursors.get(i); 5276 if (!mc.mReleased) { 5277 mc.mCursor.deactivate(); 5278 mc.mReleased = true; 5279 } 5280 } 5281 } 5282 5283 mStopped = true; 5284 } 5285 mResumed = false; 5286 } 5287 5288 final void performDestroy() { 5289 mDestroyed = true; 5290 mWindow.destroy(); 5291 mFragments.dispatchDestroy(); 5292 onDestroy(); 5293 if (mLoaderManager != null) { 5294 mLoaderManager.doDestroy(); 5295 } 5296 } 5297 5298 /** 5299 * @hide 5300 */ 5301 public final boolean isResumed() { 5302 return mResumed; 5303 } 5304 5305 void dispatchActivityResult(String who, int requestCode, 5306 int resultCode, Intent data) { 5307 if (false) Log.v( 5308 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 5309 + ", resCode=" + resultCode + ", data=" + data); 5310 mFragments.noteStateNotSaved(); 5311 if (who == null) { 5312 onActivityResult(requestCode, resultCode, data); 5313 } else { 5314 Fragment frag = mFragments.findFragmentByWho(who); 5315 if (frag != null) { 5316 frag.onActivityResult(requestCode, resultCode, data); 5317 } 5318 } 5319 } 5320} 5321