Activity.java revision 21c241e061de29a538008ca42df9c878184bcfb8
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.res.Configuration; 33import android.content.res.Resources; 34import android.content.res.TypedArray; 35import android.content.res.Resources.Theme; 36import android.database.Cursor; 37import android.graphics.Bitmap; 38import android.graphics.Canvas; 39import android.graphics.drawable.Drawable; 40import android.media.AudioManager; 41import android.net.Uri; 42import android.os.Build; 43import android.os.Bundle; 44import android.os.Handler; 45import android.os.IBinder; 46import android.os.Looper; 47import android.os.Parcelable; 48import android.os.RemoteException; 49import android.os.StrictMode; 50import android.text.Selection; 51import android.text.SpannableStringBuilder; 52import android.text.TextUtils; 53import android.text.method.TextKeyListener; 54import android.util.AttributeSet; 55import android.util.EventLog; 56import android.util.Log; 57import android.util.SparseArray; 58import android.util.TypedValue; 59import android.view.ActionMode; 60import android.view.ContextMenu; 61import android.view.ContextMenu.ContextMenuInfo; 62import android.view.ContextThemeWrapper; 63import android.view.KeyEvent; 64import android.view.LayoutInflater; 65import android.view.Menu; 66import android.view.MenuInflater; 67import android.view.MenuItem; 68import android.view.MotionEvent; 69import android.view.View; 70import android.view.WindowManagerImpl; 71import android.view.View.OnCreateContextMenuListener; 72import android.view.ViewGroup; 73import android.view.ViewGroup.LayoutParams; 74import android.view.ViewManager; 75import android.view.Window; 76import android.view.WindowManager; 77import android.view.accessibility.AccessibilityEvent; 78import android.widget.AdapterView; 79 80import java.io.FileDescriptor; 81import java.io.PrintWriter; 82import java.util.ArrayList; 83import java.util.HashMap; 84 85/** 86 * An activity is a single, focused thing that the user can do. Almost all 87 * activities interact with the user, so the Activity class takes care of 88 * creating a window for you in which you can place your UI with 89 * {@link #setContentView}. While activities are often presented to the user 90 * as full-screen windows, they can also be used in other ways: as floating 91 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 92 * or embedded inside of another activity (using {@link ActivityGroup}). 93 * 94 * There are two methods almost all subclasses of Activity will implement: 95 * 96 * <ul> 97 * <li> {@link #onCreate} is where you initialize your activity. Most 98 * importantly, here you will usually call {@link #setContentView(int)} 99 * with a layout resource defining your UI, and using {@link #findViewById} 100 * to retrieve the widgets in that UI that you need to interact with 101 * programmatically. 102 * 103 * <li> {@link #onPause} is where you deal with the user leaving your 104 * activity. Most importantly, any changes made by the user should at this 105 * point be committed (usually to the 106 * {@link android.content.ContentProvider} holding the data). 107 * </ul> 108 * 109 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 110 * activity classes must have a corresponding 111 * {@link android.R.styleable#AndroidManifestActivity <activity>} 112 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 113 * 114 * <p>Topics covered here: 115 * <ol> 116 * <li><a href="#Fragments">Fragments</a> 117 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 118 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 119 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 120 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 121 * <li><a href="#Permissions">Permissions</a> 122 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 123 * </ol> 124 * 125 * <div class="special reference"> 126 * <h3>Developer Guides</h3> 127 * <p>The Activity class is an important part of an application's overall lifecycle, 128 * and the way activities are launched and put together is a fundamental 129 * part of the platform's application model. For a detailed perspective on the structure of an 130 * Android application and how activities behave, please read the 131 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 132 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 133 * developer guides.</p> 134 * 135 * <p>You can also find a detailed discussion about how to create activities in the 136 * <a href="{@docRoot}guide/topics/fundamentals/activities.html">Activities</a> 137 * developer guide.</p> 138 * </div> 139 * 140 * <a name="Fragments"></a> 141 * <h3>Fragments</h3> 142 * 143 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 144 * implementations can make use of the {@link Fragment} class to better 145 * modularize their code, build more sophisticated user interfaces for larger 146 * screens, and help scale their application between small and large screens. 147 * 148 * <a name="ActivityLifecycle"></a> 149 * <h3>Activity Lifecycle</h3> 150 * 151 * <p>Activities in the system are managed as an <em>activity stack</em>. 152 * When a new activity is started, it is placed on the top of the stack 153 * and becomes the running activity -- the previous activity always remains 154 * below it in the stack, and will not come to the foreground again until 155 * the new activity exits.</p> 156 * 157 * <p>An activity has essentially four states:</p> 158 * <ul> 159 * <li> If an activity in the foreground of the screen (at the top of 160 * the stack), 161 * it is <em>active</em> or <em>running</em>. </li> 162 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 163 * or transparent activity has focus on top of your activity), it 164 * is <em>paused</em>. A paused activity is completely alive (it 165 * maintains all state and member information and remains attached to 166 * the window manager), but can be killed by the system in extreme 167 * low memory situations. 168 * <li>If an activity is completely obscured by another activity, 169 * it is <em>stopped</em>. It still retains all state and member information, 170 * however, it is no longer visible to the user so its window is hidden 171 * and it will often be killed by the system when memory is needed 172 * elsewhere.</li> 173 * <li>If an activity is paused or stopped, the system can drop the activity 174 * from memory by either asking it to finish, or simply killing its 175 * process. When it is displayed again to the user, it must be 176 * completely restarted and restored to its previous state.</li> 177 * </ul> 178 * 179 * <p>The following diagram shows the important state paths of an Activity. 180 * The square rectangles represent callback methods you can implement to 181 * perform operations when the Activity moves between states. The colored 182 * ovals are major states the Activity can be in.</p> 183 * 184 * <p><img src="../../../images/activity_lifecycle.png" 185 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 186 * 187 * <p>There are three key loops you may be interested in monitoring within your 188 * activity: 189 * 190 * <ul> 191 * <li>The <b>entire lifetime</b> of an activity happens between the first call 192 * to {@link android.app.Activity#onCreate} through to a single final call 193 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 194 * of "global" state in onCreate(), and release all remaining resources in 195 * onDestroy(). For example, if it has a thread running in the background 196 * to download data from the network, it may create that thread in onCreate() 197 * and then stop the thread in onDestroy(). 198 * 199 * <li>The <b>visible lifetime</b> of an activity happens between a call to 200 * {@link android.app.Activity#onStart} until a corresponding call to 201 * {@link android.app.Activity#onStop}. During this time the user can see the 202 * activity on-screen, though it may not be in the foreground and interacting 203 * with the user. Between these two methods you can maintain resources that 204 * are needed to show the activity to the user. For example, you can register 205 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 206 * that impact your UI, and unregister it in onStop() when the user an no 207 * longer see what you are displaying. The onStart() and onStop() methods 208 * can be called multiple times, as the activity becomes visible and hidden 209 * to the user. 210 * 211 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 212 * {@link android.app.Activity#onResume} until a corresponding call to 213 * {@link android.app.Activity#onPause}. During this time the activity is 214 * in front of all other activities and interacting with the user. An activity 215 * can frequently go between the resumed and paused states -- for example when 216 * the device goes to sleep, when an activity result is delivered, when a new 217 * intent is delivered -- so the code in these methods should be fairly 218 * lightweight. 219 * </ul> 220 * 221 * <p>The entire lifecycle of an activity is defined by the following 222 * Activity methods. All of these are hooks that you can override 223 * to do appropriate work when the activity changes state. All 224 * activities will implement {@link android.app.Activity#onCreate} 225 * to do their initial setup; many will also implement 226 * {@link android.app.Activity#onPause} to commit changes to data and 227 * otherwise prepare to stop interacting with the user. You should always 228 * call up to your superclass when implementing these methods.</p> 229 * 230 * </p> 231 * <pre class="prettyprint"> 232 * public class Activity extends ApplicationContext { 233 * protected void onCreate(Bundle savedInstanceState); 234 * 235 * protected void onStart(); 236 * 237 * protected void onRestart(); 238 * 239 * protected void onResume(); 240 * 241 * protected void onPause(); 242 * 243 * protected void onStop(); 244 * 245 * protected void onDestroy(); 246 * } 247 * </pre> 248 * 249 * <p>In general the movement through an activity's lifecycle looks like 250 * this:</p> 251 * 252 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 253 * <colgroup align="left" span="3" /> 254 * <colgroup align="left" /> 255 * <colgroup align="center" /> 256 * <colgroup align="center" /> 257 * 258 * <thead> 259 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 260 * </thead> 261 * 262 * <tbody> 263 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 264 * <td>Called when the activity is first created. 265 * This is where you should do all of your normal static set up: 266 * create views, bind data to lists, etc. This method also 267 * provides you with a Bundle containing the activity's previously 268 * frozen state, if there was one. 269 * <p>Always followed by <code>onStart()</code>.</td> 270 * <td align="center">No</td> 271 * <td align="center"><code>onStart()</code></td> 272 * </tr> 273 * 274 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 275 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 276 * <td>Called after your activity has been stopped, prior to it being 277 * started again. 278 * <p>Always followed by <code>onStart()</code></td> 279 * <td align="center">No</td> 280 * <td align="center"><code>onStart()</code></td> 281 * </tr> 282 * 283 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 284 * <td>Called when the activity is becoming visible to the user. 285 * <p>Followed by <code>onResume()</code> if the activity comes 286 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 287 * <td align="center">No</td> 288 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 289 * </tr> 290 * 291 * <tr><td rowspan="2" style="border-left: none;"> </td> 292 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 293 * <td>Called when the activity will start 294 * interacting with the user. At this point your activity is at 295 * the top of the activity stack, with user input going to it. 296 * <p>Always followed by <code>onPause()</code>.</td> 297 * <td align="center">No</td> 298 * <td align="center"><code>onPause()</code></td> 299 * </tr> 300 * 301 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 302 * <td>Called when the system is about to start resuming a previous 303 * activity. This is typically used to commit unsaved changes to 304 * persistent data, stop animations and other things that may be consuming 305 * CPU, etc. Implementations of this method must be very quick because 306 * the next activity will not be resumed until this method returns. 307 * <p>Followed by either <code>onResume()</code> if the activity 308 * returns back to the front, or <code>onStop()</code> if it becomes 309 * invisible to the user.</td> 310 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 311 * <td align="center"><code>onResume()</code> or<br> 312 * <code>onStop()</code></td> 313 * </tr> 314 * 315 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 316 * <td>Called when the activity is no longer visible to the user, because 317 * another activity has been resumed and is covering this one. This 318 * may happen either because a new activity is being started, an existing 319 * one is being brought in front of this one, or this one is being 320 * destroyed. 321 * <p>Followed by either <code>onRestart()</code> if 322 * this activity is coming back to interact with the user, or 323 * <code>onDestroy()</code> if this activity is going away.</td> 324 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 325 * <td align="center"><code>onRestart()</code> or<br> 326 * <code>onDestroy()</code></td> 327 * </tr> 328 * 329 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 330 * <td>The final call you receive before your 331 * activity is destroyed. This can happen either because the 332 * activity is finishing (someone called {@link Activity#finish} on 333 * it, or because the system is temporarily destroying this 334 * instance of the activity to save space. You can distinguish 335 * between these two scenarios with the {@link 336 * Activity#isFinishing} method.</td> 337 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 338 * <td align="center"><em>nothing</em></td> 339 * </tr> 340 * </tbody> 341 * </table> 342 * 343 * <p>Note the "Killable" column in the above table -- for those methods that 344 * are marked as being killable, after that method returns the process hosting the 345 * activity may killed by the system <em>at any time</em> without another line 346 * of its code being executed. Because of this, you should use the 347 * {@link #onPause} method to write any persistent data (such as user edits) 348 * to storage. In addition, the method 349 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 350 * in such a background state, allowing you to save away any dynamic instance 351 * state in your activity into the given Bundle, to be later received in 352 * {@link #onCreate} if the activity needs to be re-created. 353 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 354 * section for more information on how the lifecycle of a process is tied 355 * to the activities it is hosting. Note that it is important to save 356 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 357 * because the latter is not part of the lifecycle callbacks, so will not 358 * be called in every situation as described in its documentation.</p> 359 * 360 * <p class="note">Be aware that these semantics will change slightly between 361 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 362 * vs. those targeting prior platforms. Starting with Honeycomb, an application 363 * is not in the killable state until its {@link #onStop} has returned. This 364 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 365 * safely called after {@link #onPause()} and allows and application to safely 366 * wait until {@link #onStop()} to save persistent state.</p> 367 * 368 * <p>For those methods that are not marked as being killable, the activity's 369 * process will not be killed by the system starting from the time the method 370 * is called and continuing after it returns. Thus an activity is in the killable 371 * state, for example, between after <code>onPause()</code> to the start of 372 * <code>onResume()</code>.</p> 373 * 374 * <a name="ConfigurationChanges"></a> 375 * <h3>Configuration Changes</h3> 376 * 377 * <p>If the configuration of the device (as defined by the 378 * {@link Configuration Resources.Configuration} class) changes, 379 * then anything displaying a user interface will need to update to match that 380 * configuration. Because Activity is the primary mechanism for interacting 381 * with the user, it includes special support for handling configuration 382 * changes.</p> 383 * 384 * <p>Unless you specify otherwise, a configuration change (such as a change 385 * in screen orientation, language, input devices, etc) will cause your 386 * current activity to be <em>destroyed</em>, going through the normal activity 387 * lifecycle process of {@link #onPause}, 388 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 389 * had been in the foreground or visible to the user, once {@link #onDestroy} is 390 * called in that instance then a new instance of the activity will be 391 * created, with whatever savedInstanceState the previous instance had generated 392 * from {@link #onSaveInstanceState}.</p> 393 * 394 * <p>This is done because any application resource, 395 * including layout files, can change based on any configuration value. Thus 396 * the only safe way to handle a configuration change is to re-retrieve all 397 * resources, including layouts, drawables, and strings. Because activities 398 * must already know how to save their state and re-create themselves from 399 * that state, this is a convenient way to have an activity restart itself 400 * with a new configuration.</p> 401 * 402 * <p>In some special cases, you may want to bypass restarting of your 403 * activity based on one or more types of configuration changes. This is 404 * done with the {@link android.R.attr#configChanges android:configChanges} 405 * attribute in its manifest. For any types of configuration changes you say 406 * that you handle there, you will receive a call to your current activity's 407 * {@link #onConfigurationChanged} method instead of being restarted. If 408 * a configuration change involves any that you do not handle, however, the 409 * activity will still be restarted and {@link #onConfigurationChanged} 410 * will not be called.</p> 411 * 412 * <a name="StartingActivities"></a> 413 * <h3>Starting Activities and Getting Results</h3> 414 * 415 * <p>The {@link android.app.Activity#startActivity} 416 * method is used to start a 417 * new activity, which will be placed at the top of the activity stack. It 418 * takes a single argument, an {@link android.content.Intent Intent}, 419 * which describes the activity 420 * to be executed.</p> 421 * 422 * <p>Sometimes you want to get a result back from an activity when it 423 * ends. For example, you may start an activity that lets the user pick 424 * a person in a list of contacts; when it ends, it returns the person 425 * that was selected. To do this, you call the 426 * {@link android.app.Activity#startActivityForResult(Intent, int)} 427 * version with a second integer parameter identifying the call. The result 428 * will come back through your {@link android.app.Activity#onActivityResult} 429 * method.</p> 430 * 431 * <p>When an activity exits, it can call 432 * {@link android.app.Activity#setResult(int)} 433 * to return data back to its parent. It must always supply a result code, 434 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 435 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 436 * return back an Intent containing any additional data it wants. All of this 437 * information appears back on the 438 * parent's <code>Activity.onActivityResult()</code>, along with the integer 439 * identifier it originally supplied.</p> 440 * 441 * <p>If a child activity fails for any reason (such as crashing), the parent 442 * activity will receive a result with the code RESULT_CANCELED.</p> 443 * 444 * <pre class="prettyprint"> 445 * public class MyActivity extends Activity { 446 * ... 447 * 448 * static final int PICK_CONTACT_REQUEST = 0; 449 * 450 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 451 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 452 * // When the user center presses, let them pick a contact. 453 * startActivityForResult( 454 * new Intent(Intent.ACTION_PICK, 455 * new Uri("content://contacts")), 456 * PICK_CONTACT_REQUEST); 457 * return true; 458 * } 459 * return false; 460 * } 461 * 462 * protected void onActivityResult(int requestCode, int resultCode, 463 * Intent data) { 464 * if (requestCode == PICK_CONTACT_REQUEST) { 465 * if (resultCode == RESULT_OK) { 466 * // A contact was picked. Here we will just display it 467 * // to the user. 468 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 469 * } 470 * } 471 * } 472 * } 473 * </pre> 474 * 475 * <a name="SavingPersistentState"></a> 476 * <h3>Saving Persistent State</h3> 477 * 478 * <p>There are generally two kinds of persistent state than an activity 479 * will deal with: shared document-like data (typically stored in a SQLite 480 * database using a {@linkplain android.content.ContentProvider content provider}) 481 * and internal state such as user preferences.</p> 482 * 483 * <p>For content provider data, we suggest that activities use a 484 * "edit in place" user model. That is, any edits a user makes are effectively 485 * made immediately without requiring an additional confirmation step. 486 * Supporting this model is generally a simple matter of following two rules:</p> 487 * 488 * <ul> 489 * <li> <p>When creating a new document, the backing database entry or file for 490 * it is created immediately. For example, if the user chooses to write 491 * a new e-mail, a new entry for that e-mail is created as soon as they 492 * start entering data, so that if they go to any other activity after 493 * that point this e-mail will now appear in the list of drafts.</p> 494 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 495 * commit to the backing content provider or file any changes the user 496 * has made. This ensures that those changes will be seen by any other 497 * activity that is about to run. You will probably want to commit 498 * your data even more aggressively at key times during your 499 * activity's lifecycle: for example before starting a new 500 * activity, before finishing your own activity, when the user 501 * switches between input fields, etc.</p> 502 * </ul> 503 * 504 * <p>This model is designed to prevent data loss when a user is navigating 505 * between activities, and allows the system to safely kill an activity (because 506 * system resources are needed somewhere else) at any time after it has been 507 * paused. Note this implies 508 * that the user pressing BACK from your activity does <em>not</em> 509 * mean "cancel" -- it means to leave the activity with its current contents 510 * saved away. Canceling edits in an activity must be provided through 511 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 512 * 513 * <p>See the {@linkplain android.content.ContentProvider content package} for 514 * more information about content providers. These are a key aspect of how 515 * different activities invoke and propagate data between themselves.</p> 516 * 517 * <p>The Activity class also provides an API for managing internal persistent state 518 * associated with an activity. This can be used, for example, to remember 519 * the user's preferred initial display in a calendar (day view or week view) 520 * or the user's default home page in a web browser.</p> 521 * 522 * <p>Activity persistent state is managed 523 * with the method {@link #getPreferences}, 524 * allowing you to retrieve and 525 * modify a set of name/value pairs associated with the activity. To use 526 * preferences that are shared across multiple application components 527 * (activities, receivers, services, providers), you can use the underlying 528 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 529 * to retrieve a preferences 530 * object stored under a specific name. 531 * (Note that it is not possible to share settings data across application 532 * packages -- for that you will need a content provider.)</p> 533 * 534 * <p>Here is an excerpt from a calendar activity that stores the user's 535 * preferred view mode in its persistent settings:</p> 536 * 537 * <pre class="prettyprint"> 538 * public class CalendarActivity extends Activity { 539 * ... 540 * 541 * static final int DAY_VIEW_MODE = 0; 542 * static final int WEEK_VIEW_MODE = 1; 543 * 544 * private SharedPreferences mPrefs; 545 * private int mCurViewMode; 546 * 547 * protected void onCreate(Bundle savedInstanceState) { 548 * super.onCreate(savedInstanceState); 549 * 550 * SharedPreferences mPrefs = getSharedPreferences(); 551 * mCurViewMode = mPrefs.getInt("view_mode" DAY_VIEW_MODE); 552 * } 553 * 554 * protected void onPause() { 555 * super.onPause(); 556 * 557 * SharedPreferences.Editor ed = mPrefs.edit(); 558 * ed.putInt("view_mode", mCurViewMode); 559 * ed.commit(); 560 * } 561 * } 562 * </pre> 563 * 564 * <a name="Permissions"></a> 565 * <h3>Permissions</h3> 566 * 567 * <p>The ability to start a particular Activity can be enforced when it is 568 * declared in its 569 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 570 * tag. By doing so, other applications will need to declare a corresponding 571 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 572 * element in their own manifest to be able to start that activity. 573 * 574 * <p>When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 575 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 576 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the 577 * Activity access to the specific URIs in the Intent. Access will remain 578 * until the Activity has finished (it will remain across the hosting 579 * process being killed and other temporary destruction). As of 580 * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity 581 * was already created and a new Intent is being delivered to 582 * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added 583 * to the existing ones it holds. 584 * 585 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 586 * document for more information on permissions and security in general. 587 * 588 * <a name="ProcessLifecycle"></a> 589 * <h3>Process Lifecycle</h3> 590 * 591 * <p>The Android system attempts to keep application process around for as 592 * long as possible, but eventually will need to remove old processes when 593 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 594 * Lifecycle</a>, the decision about which process to remove is intimately 595 * tied to the state of the user's interaction with it. In general, there 596 * are four states a process can be in based on the activities running in it, 597 * listed here in order of importance. The system will kill less important 598 * processes (the last ones) before it resorts to killing more important 599 * processes (the first ones). 600 * 601 * <ol> 602 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 603 * that the user is currently interacting with) is considered the most important. 604 * Its process will only be killed as a last resort, if it uses more memory 605 * than is available on the device. Generally at this point the device has 606 * reached a memory paging state, so this is required in order to keep the user 607 * interface responsive. 608 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 609 * but not in the foreground, such as one sitting behind a foreground dialog) 610 * is considered extremely important and will not be killed unless that is 611 * required to keep the foreground activity running. 612 * <li> <p>A <b>background activity</b> (an activity that is not visible to 613 * the user and has been paused) is no longer critical, so the system may 614 * safely kill its process to reclaim memory for other foreground or 615 * visible processes. If its process needs to be killed, when the user navigates 616 * back to the activity (making it visible on the screen again), its 617 * {@link #onCreate} method will be called with the savedInstanceState it had previously 618 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 619 * state as the user last left it. 620 * <li> <p>An <b>empty process</b> is one hosting no activities or other 621 * application components (such as {@link Service} or 622 * {@link android.content.BroadcastReceiver} classes). These are killed very 623 * quickly by the system as memory becomes low. For this reason, any 624 * background operation you do outside of an activity must be executed in the 625 * context of an activity BroadcastReceiver or Service to ensure that the system 626 * knows it needs to keep your process around. 627 * </ol> 628 * 629 * <p>Sometimes an Activity may need to do a long-running operation that exists 630 * independently of the activity lifecycle itself. An example may be a camera 631 * application that allows you to upload a picture to a web site. The upload 632 * may take a long time, and the application should allow the user to leave 633 * the application will it is executing. To accomplish this, your Activity 634 * should start a {@link Service} in which the upload takes place. This allows 635 * the system to properly prioritize your process (considering it to be more 636 * important than other non-visible applications) for the duration of the 637 * upload, independent of whether the original activity is paused, stopped, 638 * or finished. 639 */ 640public class Activity extends ContextThemeWrapper 641 implements LayoutInflater.Factory2, 642 Window.Callback, KeyEvent.Callback, 643 OnCreateContextMenuListener, ComponentCallbacks2 { 644 private static final String TAG = "Activity"; 645 646 /** Standard activity result: operation canceled. */ 647 public static final int RESULT_CANCELED = 0; 648 /** Standard activity result: operation succeeded. */ 649 public static final int RESULT_OK = -1; 650 /** Start of user-defined activity results. */ 651 public static final int RESULT_FIRST_USER = 1; 652 653 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 654 private static final String FRAGMENTS_TAG = "android:fragments"; 655 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 656 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 657 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 658 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 659 660 private static class ManagedDialog { 661 Dialog mDialog; 662 Bundle mArgs; 663 } 664 private SparseArray<ManagedDialog> mManagedDialogs; 665 666 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 667 private Instrumentation mInstrumentation; 668 private IBinder mToken; 669 private int mIdent; 670 /*package*/ String mEmbeddedID; 671 private Application mApplication; 672 /*package*/ Intent mIntent; 673 private ComponentName mComponent; 674 /*package*/ ActivityInfo mActivityInfo; 675 /*package*/ ActivityThread mMainThread; 676 Activity mParent; 677 boolean mCalled; 678 boolean mCheckedForLoaderManager; 679 boolean mLoadersStarted; 680 /*package*/ boolean mResumed; 681 private boolean mStopped; 682 boolean mFinished; 683 boolean mStartedActivity; 684 /** true if the activity is going through a transient pause */ 685 /*package*/ boolean mTemporaryPause = false; 686 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 687 /*package*/ boolean mChangingConfigurations = false; 688 /*package*/ int mConfigChangeFlags; 689 /*package*/ Configuration mCurrentConfig; 690 private SearchManager mSearchManager; 691 private MenuInflater mMenuInflater; 692 693 static final class NonConfigurationInstances { 694 Object activity; 695 HashMap<String, Object> children; 696 ArrayList<Fragment> fragments; 697 SparseArray<LoaderManagerImpl> loaders; 698 } 699 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 700 701 private Window mWindow; 702 703 private WindowManager mWindowManager; 704 /*package*/ View mDecor = null; 705 /*package*/ boolean mWindowAdded = false; 706 /*package*/ boolean mVisibleFromServer = false; 707 /*package*/ boolean mVisibleFromClient = true; 708 /*package*/ ActionBarImpl mActionBar = null; 709 710 private CharSequence mTitle; 711 private int mTitleColor = 0; 712 713 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 714 715 SparseArray<LoaderManagerImpl> mAllLoaderManagers; 716 LoaderManagerImpl mLoaderManager; 717 718 private static final class ManagedCursor { 719 ManagedCursor(Cursor cursor) { 720 mCursor = cursor; 721 mReleased = false; 722 mUpdated = false; 723 } 724 725 private final Cursor mCursor; 726 private boolean mReleased; 727 private boolean mUpdated; 728 } 729 private final ArrayList<ManagedCursor> mManagedCursors = 730 new ArrayList<ManagedCursor>(); 731 732 // protected by synchronized (this) 733 int mResultCode = RESULT_CANCELED; 734 Intent mResultData = null; 735 736 private boolean mTitleReady = false; 737 738 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 739 private SpannableStringBuilder mDefaultKeySsb = null; 740 741 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 742 743 private final Object mInstanceTracker = StrictMode.trackActivity(this); 744 745 private Thread mUiThread; 746 final Handler mHandler = new Handler(); 747 748 /** Return the intent that started this activity. */ 749 public Intent getIntent() { 750 return mIntent; 751 } 752 753 /** 754 * Change the intent returned by {@link #getIntent}. This holds a 755 * reference to the given intent; it does not copy it. Often used in 756 * conjunction with {@link #onNewIntent}. 757 * 758 * @param newIntent The new Intent object to return from getIntent 759 * 760 * @see #getIntent 761 * @see #onNewIntent 762 */ 763 public void setIntent(Intent newIntent) { 764 mIntent = newIntent; 765 } 766 767 /** Return the application that owns this activity. */ 768 public final Application getApplication() { 769 return mApplication; 770 } 771 772 /** Is this activity embedded inside of another activity? */ 773 public final boolean isChild() { 774 return mParent != null; 775 } 776 777 /** Return the parent activity if this view is an embedded child. */ 778 public final Activity getParent() { 779 return mParent; 780 } 781 782 /** Retrieve the window manager for showing custom windows. */ 783 public WindowManager getWindowManager() { 784 return mWindowManager; 785 } 786 787 /** 788 * Retrieve the current {@link android.view.Window} for the activity. 789 * This can be used to directly access parts of the Window API that 790 * are not available through Activity/Screen. 791 * 792 * @return Window The current window, or null if the activity is not 793 * visual. 794 */ 795 public Window getWindow() { 796 return mWindow; 797 } 798 799 /** 800 * Return the LoaderManager for this fragment, creating it if needed. 801 */ 802 public LoaderManager getLoaderManager() { 803 if (mLoaderManager != null) { 804 return mLoaderManager; 805 } 806 mCheckedForLoaderManager = true; 807 mLoaderManager = getLoaderManager(-1, mLoadersStarted, true); 808 return mLoaderManager; 809 } 810 811 LoaderManagerImpl getLoaderManager(int index, boolean started, boolean create) { 812 if (mAllLoaderManagers == null) { 813 mAllLoaderManagers = new SparseArray<LoaderManagerImpl>(); 814 } 815 LoaderManagerImpl lm = mAllLoaderManagers.get(index); 816 if (lm == null) { 817 if (create) { 818 lm = new LoaderManagerImpl(this, started); 819 mAllLoaderManagers.put(index, lm); 820 } 821 } else { 822 lm.updateActivity(this); 823 } 824 return lm; 825 } 826 827 /** 828 * Calls {@link android.view.Window#getCurrentFocus} on the 829 * Window of this Activity to return the currently focused view. 830 * 831 * @return View The current View with focus or null. 832 * 833 * @see #getWindow 834 * @see android.view.Window#getCurrentFocus 835 */ 836 public View getCurrentFocus() { 837 return mWindow != null ? mWindow.getCurrentFocus() : null; 838 } 839 840 /** 841 * Called when the activity is starting. This is where most initialization 842 * should go: calling {@link #setContentView(int)} to inflate the 843 * activity's UI, using {@link #findViewById} to programmatically interact 844 * with widgets in the UI, calling 845 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 846 * cursors for data being displayed, etc. 847 * 848 * <p>You can call {@link #finish} from within this function, in 849 * which case onDestroy() will be immediately called without any of the rest 850 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 851 * {@link #onPause}, etc) executing. 852 * 853 * <p><em>Derived classes must call through to the super class's 854 * implementation of this method. If they do not, an exception will be 855 * thrown.</em></p> 856 * 857 * @param savedInstanceState If the activity is being re-initialized after 858 * previously being shut down then this Bundle contains the data it most 859 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 860 * 861 * @see #onStart 862 * @see #onSaveInstanceState 863 * @see #onRestoreInstanceState 864 * @see #onPostCreate 865 */ 866 protected void onCreate(Bundle savedInstanceState) { 867 if (mLastNonConfigurationInstances != null) { 868 mAllLoaderManagers = mLastNonConfigurationInstances.loaders; 869 } 870 if (savedInstanceState != null) { 871 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 872 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 873 ? mLastNonConfigurationInstances.fragments : null); 874 } 875 mFragments.dispatchCreate(); 876 getApplication().dispatchActivityCreated(this, savedInstanceState); 877 mCalled = true; 878 } 879 880 /** 881 * The hook for {@link ActivityThread} to restore the state of this activity. 882 * 883 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 884 * {@link #restoreManagedDialogs(android.os.Bundle)}. 885 * 886 * @param savedInstanceState contains the saved state 887 */ 888 final void performRestoreInstanceState(Bundle savedInstanceState) { 889 onRestoreInstanceState(savedInstanceState); 890 restoreManagedDialogs(savedInstanceState); 891 } 892 893 /** 894 * This method is called after {@link #onStart} when the activity is 895 * being re-initialized from a previously saved state, given here in 896 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 897 * to restore their state, but it is sometimes convenient to do it here 898 * after all of the initialization has been done or to allow subclasses to 899 * decide whether to use your default implementation. The default 900 * implementation of this method performs a restore of any view state that 901 * had previously been frozen by {@link #onSaveInstanceState}. 902 * 903 * <p>This method is called between {@link #onStart} and 904 * {@link #onPostCreate}. 905 * 906 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 907 * 908 * @see #onCreate 909 * @see #onPostCreate 910 * @see #onResume 911 * @see #onSaveInstanceState 912 */ 913 protected void onRestoreInstanceState(Bundle savedInstanceState) { 914 if (mWindow != null) { 915 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 916 if (windowState != null) { 917 mWindow.restoreHierarchyState(windowState); 918 } 919 } 920 } 921 922 /** 923 * Restore the state of any saved managed dialogs. 924 * 925 * @param savedInstanceState The bundle to restore from. 926 */ 927 private void restoreManagedDialogs(Bundle savedInstanceState) { 928 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 929 if (b == null) { 930 return; 931 } 932 933 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 934 final int numDialogs = ids.length; 935 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 936 for (int i = 0; i < numDialogs; i++) { 937 final Integer dialogId = ids[i]; 938 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 939 if (dialogState != null) { 940 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 941 // so tell createDialog() not to do it, otherwise we get an exception 942 final ManagedDialog md = new ManagedDialog(); 943 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 944 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 945 if (md.mDialog != null) { 946 mManagedDialogs.put(dialogId, md); 947 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 948 md.mDialog.onRestoreInstanceState(dialogState); 949 } 950 } 951 } 952 } 953 954 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 955 final Dialog dialog = onCreateDialog(dialogId, args); 956 if (dialog == null) { 957 return null; 958 } 959 dialog.dispatchOnCreate(state); 960 return dialog; 961 } 962 963 private static String savedDialogKeyFor(int key) { 964 return SAVED_DIALOG_KEY_PREFIX + key; 965 } 966 967 private static String savedDialogArgsKeyFor(int key) { 968 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 969 } 970 971 /** 972 * Called when activity start-up is complete (after {@link #onStart} 973 * and {@link #onRestoreInstanceState} have been called). Applications will 974 * generally not implement this method; it is intended for system 975 * classes to do final initialization after application code has run. 976 * 977 * <p><em>Derived classes must call through to the super class's 978 * implementation of this method. If they do not, an exception will be 979 * thrown.</em></p> 980 * 981 * @param savedInstanceState If the activity is being re-initialized after 982 * previously being shut down then this Bundle contains the data it most 983 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 984 * @see #onCreate 985 */ 986 protected void onPostCreate(Bundle savedInstanceState) { 987 if (!isChild()) { 988 mTitleReady = true; 989 onTitleChanged(getTitle(), getTitleColor()); 990 } 991 mCalled = true; 992 } 993 994 /** 995 * Called after {@link #onCreate} — or after {@link #onRestart} when 996 * the activity had been stopped, but is now again being displayed to the 997 * user. It will be followed by {@link #onResume}. 998 * 999 * <p><em>Derived classes must call through to the super class's 1000 * implementation of this method. If they do not, an exception will be 1001 * thrown.</em></p> 1002 * 1003 * @see #onCreate 1004 * @see #onStop 1005 * @see #onResume 1006 */ 1007 protected void onStart() { 1008 mCalled = true; 1009 1010 if (!mLoadersStarted) { 1011 mLoadersStarted = true; 1012 if (mLoaderManager != null) { 1013 mLoaderManager.doStart(); 1014 } else if (!mCheckedForLoaderManager) { 1015 mLoaderManager = getLoaderManager(-1, mLoadersStarted, false); 1016 } 1017 mCheckedForLoaderManager = true; 1018 } 1019 1020 getApplication().dispatchActivityStarted(this); 1021 } 1022 1023 /** 1024 * Called after {@link #onStop} when the current activity is being 1025 * re-displayed to the user (the user has navigated back to it). It will 1026 * be followed by {@link #onStart} and then {@link #onResume}. 1027 * 1028 * <p>For activities that are using raw {@link Cursor} objects (instead of 1029 * creating them through 1030 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1031 * this is usually the place 1032 * where the cursor should be requeried (because you had deactivated it in 1033 * {@link #onStop}. 1034 * 1035 * <p><em>Derived classes must call through to the super class's 1036 * implementation of this method. If they do not, an exception will be 1037 * thrown.</em></p> 1038 * 1039 * @see #onStop 1040 * @see #onStart 1041 * @see #onResume 1042 */ 1043 protected void onRestart() { 1044 mCalled = true; 1045 } 1046 1047 /** 1048 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1049 * {@link #onPause}, for your activity to start interacting with the user. 1050 * This is a good place to begin animations, open exclusive-access devices 1051 * (such as the camera), etc. 1052 * 1053 * <p>Keep in mind that onResume is not the best indicator that your activity 1054 * is visible to the user; a system window such as the keyguard may be in 1055 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1056 * activity is visible to the user (for example, to resume a game). 1057 * 1058 * <p><em>Derived classes must call through to the super class's 1059 * implementation of this method. If they do not, an exception will be 1060 * thrown.</em></p> 1061 * 1062 * @see #onRestoreInstanceState 1063 * @see #onRestart 1064 * @see #onPostResume 1065 * @see #onPause 1066 */ 1067 protected void onResume() { 1068 getApplication().dispatchActivityResumed(this); 1069 mCalled = true; 1070 } 1071 1072 /** 1073 * Called when activity resume is complete (after {@link #onResume} has 1074 * been called). Applications will generally not implement this method; 1075 * it is intended for system classes to do final setup after application 1076 * resume code has run. 1077 * 1078 * <p><em>Derived classes must call through to the super class's 1079 * implementation of this method. If they do not, an exception will be 1080 * thrown.</em></p> 1081 * 1082 * @see #onResume 1083 */ 1084 protected void onPostResume() { 1085 final Window win = getWindow(); 1086 if (win != null) win.makeActive(); 1087 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1088 mCalled = true; 1089 } 1090 1091 /** 1092 * This is called for activities that set launchMode to "singleTop" in 1093 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1094 * flag when calling {@link #startActivity}. In either case, when the 1095 * activity is re-launched while at the top of the activity stack instead 1096 * of a new instance of the activity being started, onNewIntent() will be 1097 * called on the existing instance with the Intent that was used to 1098 * re-launch it. 1099 * 1100 * <p>An activity will always be paused before receiving a new intent, so 1101 * you can count on {@link #onResume} being called after this method. 1102 * 1103 * <p>Note that {@link #getIntent} still returns the original Intent. You 1104 * can use {@link #setIntent} to update it to this new Intent. 1105 * 1106 * @param intent The new intent that was started for the activity. 1107 * 1108 * @see #getIntent 1109 * @see #setIntent 1110 * @see #onResume 1111 */ 1112 protected void onNewIntent(Intent intent) { 1113 } 1114 1115 /** 1116 * The hook for {@link ActivityThread} to save the state of this activity. 1117 * 1118 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1119 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1120 * 1121 * @param outState The bundle to save the state to. 1122 */ 1123 final void performSaveInstanceState(Bundle outState) { 1124 onSaveInstanceState(outState); 1125 saveManagedDialogs(outState); 1126 } 1127 1128 /** 1129 * Called to retrieve per-instance state from an activity before being killed 1130 * so that the state can be restored in {@link #onCreate} or 1131 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1132 * will be passed to both). 1133 * 1134 * <p>This method is called before an activity may be killed so that when it 1135 * comes back some time in the future it can restore its state. For example, 1136 * if activity B is launched in front of activity A, and at some point activity 1137 * A is killed to reclaim resources, activity A will have a chance to save the 1138 * current state of its user interface via this method so that when the user 1139 * returns to activity A, the state of the user interface can be restored 1140 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1141 * 1142 * <p>Do not confuse this method with activity lifecycle callbacks such as 1143 * {@link #onPause}, which is always called when an activity is being placed 1144 * in the background or on its way to destruction, or {@link #onStop} which 1145 * is called before destruction. One example of when {@link #onPause} and 1146 * {@link #onStop} is called and not this method is when a user navigates back 1147 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1148 * on B because that particular instance will never be restored, so the 1149 * system avoids calling it. An example when {@link #onPause} is called and 1150 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1151 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1152 * killed during the lifetime of B since the state of the user interface of 1153 * A will stay intact. 1154 * 1155 * <p>The default implementation takes care of most of the UI per-instance 1156 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1157 * view in the hierarchy that has an id, and by saving the id of the currently 1158 * focused view (all of which is restored by the default implementation of 1159 * {@link #onRestoreInstanceState}). If you override this method to save additional 1160 * information not captured by each individual view, you will likely want to 1161 * call through to the default implementation, otherwise be prepared to save 1162 * all of the state of each view yourself. 1163 * 1164 * <p>If called, this method will occur before {@link #onStop}. There are 1165 * no guarantees about whether it will occur before or after {@link #onPause}. 1166 * 1167 * @param outState Bundle in which to place your saved state. 1168 * 1169 * @see #onCreate 1170 * @see #onRestoreInstanceState 1171 * @see #onPause 1172 */ 1173 protected void onSaveInstanceState(Bundle outState) { 1174 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1175 Parcelable p = mFragments.saveAllState(); 1176 if (p != null) { 1177 outState.putParcelable(FRAGMENTS_TAG, p); 1178 } 1179 getApplication().dispatchActivitySaveInstanceState(this, outState); 1180 } 1181 1182 /** 1183 * Save the state of any managed dialogs. 1184 * 1185 * @param outState place to store the saved state. 1186 */ 1187 private void saveManagedDialogs(Bundle outState) { 1188 if (mManagedDialogs == null) { 1189 return; 1190 } 1191 1192 final int numDialogs = mManagedDialogs.size(); 1193 if (numDialogs == 0) { 1194 return; 1195 } 1196 1197 Bundle dialogState = new Bundle(); 1198 1199 int[] ids = new int[mManagedDialogs.size()]; 1200 1201 // save each dialog's bundle, gather the ids 1202 for (int i = 0; i < numDialogs; i++) { 1203 final int key = mManagedDialogs.keyAt(i); 1204 ids[i] = key; 1205 final ManagedDialog md = mManagedDialogs.valueAt(i); 1206 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1207 if (md.mArgs != null) { 1208 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1209 } 1210 } 1211 1212 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1213 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1214 } 1215 1216 1217 /** 1218 * Called as part of the activity lifecycle when an activity is going into 1219 * the background, but has not (yet) been killed. The counterpart to 1220 * {@link #onResume}. 1221 * 1222 * <p>When activity B is launched in front of activity A, this callback will 1223 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1224 * so be sure to not do anything lengthy here. 1225 * 1226 * <p>This callback is mostly used for saving any persistent state the 1227 * activity is editing, to present a "edit in place" model to the user and 1228 * making sure nothing is lost if there are not enough resources to start 1229 * the new activity without first killing this one. This is also a good 1230 * place to do things like stop animations and other things that consume a 1231 * noticeable mount of CPU in order to make the switch to the next activity 1232 * as fast as possible, or to close resources that are exclusive access 1233 * such as the camera. 1234 * 1235 * <p>In situations where the system needs more memory it may kill paused 1236 * processes to reclaim resources. Because of this, you should be sure 1237 * that all of your state is saved by the time you return from 1238 * this function. In general {@link #onSaveInstanceState} is used to save 1239 * per-instance state in the activity and this method is used to store 1240 * global persistent data (in content providers, files, etc.) 1241 * 1242 * <p>After receiving this call you will usually receive a following call 1243 * to {@link #onStop} (after the next activity has been resumed and 1244 * displayed), however in some cases there will be a direct call back to 1245 * {@link #onResume} without going through the stopped state. 1246 * 1247 * <p><em>Derived classes must call through to the super class's 1248 * implementation of this method. If they do not, an exception will be 1249 * thrown.</em></p> 1250 * 1251 * @see #onResume 1252 * @see #onSaveInstanceState 1253 * @see #onStop 1254 */ 1255 protected void onPause() { 1256 getApplication().dispatchActivityPaused(this); 1257 mCalled = true; 1258 } 1259 1260 /** 1261 * Called as part of the activity lifecycle when an activity is about to go 1262 * into the background as the result of user choice. For example, when the 1263 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1264 * when an incoming phone call causes the in-call Activity to be automatically 1265 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1266 * the activity being interrupted. In cases when it is invoked, this method 1267 * is called right before the activity's {@link #onPause} callback. 1268 * 1269 * <p>This callback and {@link #onUserInteraction} are intended to help 1270 * activities manage status bar notifications intelligently; specifically, 1271 * for helping activities determine the proper time to cancel a notfication. 1272 * 1273 * @see #onUserInteraction() 1274 */ 1275 protected void onUserLeaveHint() { 1276 } 1277 1278 /** 1279 * Generate a new thumbnail for this activity. This method is called before 1280 * pausing the activity, and should draw into <var>outBitmap</var> the 1281 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1282 * can use the given <var>canvas</var>, which is configured to draw into the 1283 * bitmap, for rendering if desired. 1284 * 1285 * <p>The default implementation returns fails and does not draw a thumbnail; 1286 * this will result in the platform creating its own thumbnail if needed. 1287 * 1288 * @param outBitmap The bitmap to contain the thumbnail. 1289 * @param canvas Can be used to render into the bitmap. 1290 * 1291 * @return Return true if you have drawn into the bitmap; otherwise after 1292 * you return it will be filled with a default thumbnail. 1293 * 1294 * @see #onCreateDescription 1295 * @see #onSaveInstanceState 1296 * @see #onPause 1297 */ 1298 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1299 return false; 1300 } 1301 1302 /** 1303 * Generate a new description for this activity. This method is called 1304 * before pausing the activity and can, if desired, return some textual 1305 * description of its current state to be displayed to the user. 1306 * 1307 * <p>The default implementation returns null, which will cause you to 1308 * inherit the description from the previous activity. If all activities 1309 * return null, generally the label of the top activity will be used as the 1310 * description. 1311 * 1312 * @return A description of what the user is doing. It should be short and 1313 * sweet (only a few words). 1314 * 1315 * @see #onCreateThumbnail 1316 * @see #onSaveInstanceState 1317 * @see #onPause 1318 */ 1319 public CharSequence onCreateDescription() { 1320 return null; 1321 } 1322 1323 /** 1324 * Called when you are no longer visible to the user. You will next 1325 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1326 * depending on later user activity. 1327 * 1328 * <p>Note that this method may never be called, in low memory situations 1329 * where the system does not have enough memory to keep your activity's 1330 * process running after its {@link #onPause} method is called. 1331 * 1332 * <p><em>Derived classes must call through to the super class's 1333 * implementation of this method. If they do not, an exception will be 1334 * thrown.</em></p> 1335 * 1336 * @see #onRestart 1337 * @see #onResume 1338 * @see #onSaveInstanceState 1339 * @see #onDestroy 1340 */ 1341 protected void onStop() { 1342 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1343 getApplication().dispatchActivityStopped(this); 1344 mCalled = true; 1345 } 1346 1347 /** 1348 * Perform any final cleanup before an activity is destroyed. This can 1349 * happen either because the activity is finishing (someone called 1350 * {@link #finish} on it, or because the system is temporarily destroying 1351 * this instance of the activity to save space. You can distinguish 1352 * between these two scenarios with the {@link #isFinishing} method. 1353 * 1354 * <p><em>Note: do not count on this method being called as a place for 1355 * saving data! For example, if an activity is editing data in a content 1356 * provider, those edits should be committed in either {@link #onPause} or 1357 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1358 * free resources like threads that are associated with an activity, so 1359 * that a destroyed activity does not leave such things around while the 1360 * rest of its application is still running. There are situations where 1361 * the system will simply kill the activity's hosting process without 1362 * calling this method (or any others) in it, so it should not be used to 1363 * do things that are intended to remain around after the process goes 1364 * away. 1365 * 1366 * <p><em>Derived classes must call through to the super class's 1367 * implementation of this method. If they do not, an exception will be 1368 * thrown.</em></p> 1369 * 1370 * @see #onPause 1371 * @see #onStop 1372 * @see #finish 1373 * @see #isFinishing 1374 */ 1375 protected void onDestroy() { 1376 mCalled = true; 1377 1378 // dismiss any dialogs we are managing. 1379 if (mManagedDialogs != null) { 1380 final int numDialogs = mManagedDialogs.size(); 1381 for (int i = 0; i < numDialogs; i++) { 1382 final ManagedDialog md = mManagedDialogs.valueAt(i); 1383 if (md.mDialog.isShowing()) { 1384 md.mDialog.dismiss(); 1385 } 1386 } 1387 mManagedDialogs = null; 1388 } 1389 1390 // close any cursors we are managing. 1391 synchronized (mManagedCursors) { 1392 int numCursors = mManagedCursors.size(); 1393 for (int i = 0; i < numCursors; i++) { 1394 ManagedCursor c = mManagedCursors.get(i); 1395 if (c != null) { 1396 c.mCursor.close(); 1397 } 1398 } 1399 mManagedCursors.clear(); 1400 } 1401 1402 // Close any open search dialog 1403 if (mSearchManager != null) { 1404 mSearchManager.stopSearch(); 1405 } 1406 1407 getApplication().dispatchActivityDestroyed(this); 1408 } 1409 1410 /** 1411 * Called by the system when the device configuration changes while your 1412 * activity is running. Note that this will <em>only</em> be called if 1413 * you have selected configurations you would like to handle with the 1414 * {@link android.R.attr#configChanges} attribute in your manifest. If 1415 * any configuration change occurs that is not selected to be reported 1416 * by that attribute, then instead of reporting it the system will stop 1417 * and restart the activity (to have it launched with the new 1418 * configuration). 1419 * 1420 * <p>At the time that this function has been called, your Resources 1421 * object will have been updated to return resource values matching the 1422 * new configuration. 1423 * 1424 * @param newConfig The new device configuration. 1425 */ 1426 public void onConfigurationChanged(Configuration newConfig) { 1427 mCalled = true; 1428 1429 mFragments.dispatchConfigurationChanged(newConfig); 1430 1431 if (mWindow != null) { 1432 // Pass the configuration changed event to the window 1433 mWindow.onConfigurationChanged(newConfig); 1434 } 1435 1436 if (mActionBar != null) { 1437 // Do this last; the action bar will need to access 1438 // view changes from above. 1439 mActionBar.onConfigurationChanged(newConfig); 1440 } 1441 } 1442 1443 /** 1444 * If this activity is being destroyed because it can not handle a 1445 * configuration parameter being changed (and thus its 1446 * {@link #onConfigurationChanged(Configuration)} method is 1447 * <em>not</em> being called), then you can use this method to discover 1448 * the set of changes that have occurred while in the process of being 1449 * destroyed. Note that there is no guarantee that these will be 1450 * accurate (other changes could have happened at any time), so you should 1451 * only use this as an optimization hint. 1452 * 1453 * @return Returns a bit field of the configuration parameters that are 1454 * changing, as defined by the {@link android.content.res.Configuration} 1455 * class. 1456 */ 1457 public int getChangingConfigurations() { 1458 return mConfigChangeFlags; 1459 } 1460 1461 /** 1462 * Retrieve the non-configuration instance data that was previously 1463 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1464 * be available from the initial {@link #onCreate} and 1465 * {@link #onStart} calls to the new instance, allowing you to extract 1466 * any useful dynamic state from the previous instance. 1467 * 1468 * <p>Note that the data you retrieve here should <em>only</em> be used 1469 * as an optimization for handling configuration changes. You should always 1470 * be able to handle getting a null pointer back, and an activity must 1471 * still be able to restore itself to its previous state (through the 1472 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1473 * function returns null. 1474 * 1475 * @return Returns the object previously returned by 1476 * {@link #onRetainNonConfigurationInstance()}. 1477 * 1478 * @deprecated Use the new {@link Fragment} API 1479 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1480 * available on older platforms through the Android compatibility package. 1481 */ 1482 @Deprecated 1483 public Object getLastNonConfigurationInstance() { 1484 return mLastNonConfigurationInstances != null 1485 ? mLastNonConfigurationInstances.activity : null; 1486 } 1487 1488 /** 1489 * Called by the system, as part of destroying an 1490 * activity due to a configuration change, when it is known that a new 1491 * instance will immediately be created for the new configuration. You 1492 * can return any object you like here, including the activity instance 1493 * itself, which can later be retrieved by calling 1494 * {@link #getLastNonConfigurationInstance()} in the new activity 1495 * instance. 1496 * 1497 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1498 * or later, consider instead using a {@link Fragment} with 1499 * {@link Fragment#setRetainInstance(boolean) 1500 * Fragment.setRetainInstance(boolean}.</em> 1501 * 1502 * <p>This function is called purely as an optimization, and you must 1503 * not rely on it being called. When it is called, a number of guarantees 1504 * will be made to help optimize configuration switching: 1505 * <ul> 1506 * <li> The function will be called between {@link #onStop} and 1507 * {@link #onDestroy}. 1508 * <li> A new instance of the activity will <em>always</em> be immediately 1509 * created after this one's {@link #onDestroy()} is called. In particular, 1510 * <em>no</em> messages will be dispatched during this time (when the returned 1511 * object does not have an activity to be associated with). 1512 * <li> The object you return here will <em>always</em> be available from 1513 * the {@link #getLastNonConfigurationInstance()} method of the following 1514 * activity instance as described there. 1515 * </ul> 1516 * 1517 * <p>These guarantees are designed so that an activity can use this API 1518 * to propagate extensive state from the old to new activity instance, from 1519 * loaded bitmaps, to network connections, to evenly actively running 1520 * threads. Note that you should <em>not</em> propagate any data that 1521 * may change based on the configuration, including any data loaded from 1522 * resources such as strings, layouts, or drawables. 1523 * 1524 * <p>The guarantee of no message handling during the switch to the next 1525 * activity simplifies use with active objects. For example if your retained 1526 * state is an {@link android.os.AsyncTask} you are guaranteed that its 1527 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 1528 * not be called from the call here until you execute the next instance's 1529 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 1530 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 1531 * running in a separate thread.) 1532 * 1533 * @return Return any Object holding the desired state to propagate to the 1534 * next activity instance. 1535 * 1536 * @deprecated Use the new {@link Fragment} API 1537 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1538 * available on older platforms through the Android compatibility package. 1539 */ 1540 public Object onRetainNonConfigurationInstance() { 1541 return null; 1542 } 1543 1544 /** 1545 * Retrieve the non-configuration instance data that was previously 1546 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1547 * be available from the initial {@link #onCreate} and 1548 * {@link #onStart} calls to the new instance, allowing you to extract 1549 * any useful dynamic state from the previous instance. 1550 * 1551 * <p>Note that the data you retrieve here should <em>only</em> be used 1552 * as an optimization for handling configuration changes. You should always 1553 * be able to handle getting a null pointer back, and an activity must 1554 * still be able to restore itself to its previous state (through the 1555 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1556 * function returns null. 1557 * 1558 * @return Returns the object previously returned by 1559 * {@link #onRetainNonConfigurationChildInstances()} 1560 */ 1561 HashMap<String, Object> getLastNonConfigurationChildInstances() { 1562 return mLastNonConfigurationInstances != null 1563 ? mLastNonConfigurationInstances.children : null; 1564 } 1565 1566 /** 1567 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1568 * it should return either a mapping from child activity id strings to arbitrary objects, 1569 * or null. This method is intended to be used by Activity framework subclasses that control a 1570 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1571 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1572 */ 1573 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1574 return null; 1575 } 1576 1577 NonConfigurationInstances retainNonConfigurationInstances() { 1578 Object activity = onRetainNonConfigurationInstance(); 1579 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 1580 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 1581 boolean retainLoaders = false; 1582 if (mAllLoaderManagers != null) { 1583 // prune out any loader managers that were already stopped and so 1584 // have nothing useful to retain. 1585 for (int i=mAllLoaderManagers.size()-1; i>=0; i--) { 1586 LoaderManagerImpl lm = mAllLoaderManagers.valueAt(i); 1587 if (lm.mRetaining) { 1588 retainLoaders = true; 1589 } else { 1590 lm.doDestroy(); 1591 mAllLoaderManagers.removeAt(i); 1592 } 1593 } 1594 } 1595 if (activity == null && children == null && fragments == null && !retainLoaders) { 1596 return null; 1597 } 1598 1599 NonConfigurationInstances nci = new NonConfigurationInstances(); 1600 nci.activity = activity; 1601 nci.children = children; 1602 nci.fragments = fragments; 1603 nci.loaders = mAllLoaderManagers; 1604 return nci; 1605 } 1606 1607 public void onLowMemory() { 1608 mCalled = true; 1609 mFragments.dispatchLowMemory(); 1610 } 1611 1612 public void onTrimMemory(int level) { 1613 mCalled = true; 1614 mFragments.dispatchTrimMemory(level); 1615 } 1616 1617 /** 1618 * Return the FragmentManager for interacting with fragments associated 1619 * with this activity. 1620 */ 1621 public FragmentManager getFragmentManager() { 1622 return mFragments; 1623 } 1624 1625 void invalidateFragmentIndex(int index) { 1626 //Log.v(TAG, "invalidateFragmentIndex: index=" + index); 1627 if (mAllLoaderManagers != null) { 1628 LoaderManagerImpl lm = mAllLoaderManagers.get(index); 1629 if (lm != null && !lm.mRetaining) { 1630 lm.doDestroy(); 1631 mAllLoaderManagers.remove(index); 1632 } 1633 } 1634 } 1635 1636 /** 1637 * Called when a Fragment is being attached to this activity, immediately 1638 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 1639 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 1640 */ 1641 public void onAttachFragment(Fragment fragment) { 1642 } 1643 1644 /** 1645 * Wrapper around 1646 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1647 * that gives the resulting {@link Cursor} to call 1648 * {@link #startManagingCursor} so that the activity will manage its 1649 * lifecycle for you. 1650 * 1651 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1652 * or later, consider instead using {@link LoaderManager} instead, available 1653 * via {@link #getLoaderManager()}.</em> 1654 * 1655 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1656 * this method, because the activity will do that for you at the appropriate time. However, if 1657 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1658 * not</em> automatically close the cursor and, in that case, you must call 1659 * {@link Cursor#close()}.</p> 1660 * 1661 * @param uri The URI of the content provider to query. 1662 * @param projection List of columns to return. 1663 * @param selection SQL WHERE clause. 1664 * @param sortOrder SQL ORDER BY clause. 1665 * 1666 * @return The Cursor that was returned by query(). 1667 * 1668 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1669 * @see #startManagingCursor 1670 * @hide 1671 * 1672 * @deprecated Use {@link CursorLoader} instead. 1673 */ 1674 @Deprecated 1675 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1676 String sortOrder) { 1677 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1678 if (c != null) { 1679 startManagingCursor(c); 1680 } 1681 return c; 1682 } 1683 1684 /** 1685 * Wrapper around 1686 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1687 * that gives the resulting {@link Cursor} to call 1688 * {@link #startManagingCursor} so that the activity will manage its 1689 * lifecycle for you. 1690 * 1691 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1692 * or later, consider instead using {@link LoaderManager} instead, available 1693 * via {@link #getLoaderManager()}.</em> 1694 * 1695 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1696 * this method, because the activity will do that for you at the appropriate time. However, if 1697 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1698 * not</em> automatically close the cursor and, in that case, you must call 1699 * {@link Cursor#close()}.</p> 1700 * 1701 * @param uri The URI of the content provider to query. 1702 * @param projection List of columns to return. 1703 * @param selection SQL WHERE clause. 1704 * @param selectionArgs The arguments to selection, if any ?s are pesent 1705 * @param sortOrder SQL ORDER BY clause. 1706 * 1707 * @return The Cursor that was returned by query(). 1708 * 1709 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1710 * @see #startManagingCursor 1711 * 1712 * @deprecated Use {@link CursorLoader} instead. 1713 */ 1714 @Deprecated 1715 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1716 String[] selectionArgs, String sortOrder) { 1717 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1718 if (c != null) { 1719 startManagingCursor(c); 1720 } 1721 return c; 1722 } 1723 1724 /** 1725 * This method allows the activity to take care of managing the given 1726 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1727 * That is, when the activity is stopped it will automatically call 1728 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1729 * it will call {@link Cursor#requery} for you. When the activity is 1730 * destroyed, all managed Cursors will be closed automatically. 1731 * 1732 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1733 * or later, consider instead using {@link LoaderManager} instead, available 1734 * via {@link #getLoaderManager()}.</em> 1735 * 1736 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 1737 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 1738 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 1739 * <em>will not</em> automatically close the cursor and, in that case, you must call 1740 * {@link Cursor#close()}.</p> 1741 * 1742 * @param c The Cursor to be managed. 1743 * 1744 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1745 * @see #stopManagingCursor 1746 * 1747 * @deprecated Use the new {@link android.content.CursorLoader} class with 1748 * {@link LoaderManager} instead; this is also 1749 * available on older platforms through the Android compatibility package. 1750 */ 1751 @Deprecated 1752 public void startManagingCursor(Cursor c) { 1753 synchronized (mManagedCursors) { 1754 mManagedCursors.add(new ManagedCursor(c)); 1755 } 1756 } 1757 1758 /** 1759 * Given a Cursor that was previously given to 1760 * {@link #startManagingCursor}, stop the activity's management of that 1761 * cursor. 1762 * 1763 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 1764 * the system <em>will not</em> automatically close the cursor and you must call 1765 * {@link Cursor#close()}.</p> 1766 * 1767 * @param c The Cursor that was being managed. 1768 * 1769 * @see #startManagingCursor 1770 * 1771 * @deprecated Use the new {@link android.content.CursorLoader} class with 1772 * {@link LoaderManager} instead; this is also 1773 * available on older platforms through the Android compatibility package. 1774 */ 1775 @Deprecated 1776 public void stopManagingCursor(Cursor c) { 1777 synchronized (mManagedCursors) { 1778 final int N = mManagedCursors.size(); 1779 for (int i=0; i<N; i++) { 1780 ManagedCursor mc = mManagedCursors.get(i); 1781 if (mc.mCursor == c) { 1782 mManagedCursors.remove(i); 1783 break; 1784 } 1785 } 1786 } 1787 } 1788 1789 /** 1790 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 1791 * this is a no-op. 1792 * @hide 1793 */ 1794 @Deprecated 1795 public void setPersistent(boolean isPersistent) { 1796 } 1797 1798 /** 1799 * Finds a view that was identified by the id attribute from the XML that 1800 * was processed in {@link #onCreate}. 1801 * 1802 * @return The view if found or null otherwise. 1803 */ 1804 public View findViewById(int id) { 1805 return getWindow().findViewById(id); 1806 } 1807 1808 /** 1809 * Retrieve a reference to this activity's ActionBar. 1810 * 1811 * @return The Activity's ActionBar, or null if it does not have one. 1812 */ 1813 public ActionBar getActionBar() { 1814 initActionBar(); 1815 return mActionBar; 1816 } 1817 1818 /** 1819 * Creates a new ActionBar, locates the inflated ActionBarView, 1820 * initializes the ActionBar with the view, and sets mActionBar. 1821 */ 1822 private void initActionBar() { 1823 Window window = getWindow(); 1824 1825 // Initializing the window decor can change window feature flags. 1826 // Make sure that we have the correct set before performing the test below. 1827 window.getDecorView(); 1828 1829 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 1830 return; 1831 } 1832 1833 mActionBar = new ActionBarImpl(this); 1834 } 1835 1836 /** 1837 * Set the activity content from a layout resource. The resource will be 1838 * inflated, adding all top-level views to the activity. 1839 * 1840 * @param layoutResID Resource ID to be inflated. 1841 * 1842 * @see #setContentView(android.view.View) 1843 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1844 */ 1845 public void setContentView(int layoutResID) { 1846 getWindow().setContentView(layoutResID); 1847 initActionBar(); 1848 } 1849 1850 /** 1851 * Set the activity content to an explicit view. This view is placed 1852 * directly into the activity's view hierarchy. It can itself be a complex 1853 * view hierarchy. When calling this method, the layout parameters of the 1854 * specified view are ignored. Both the width and the height of the view are 1855 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 1856 * your own layout parameters, invoke 1857 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 1858 * instead. 1859 * 1860 * @param view The desired content to display. 1861 * 1862 * @see #setContentView(int) 1863 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1864 */ 1865 public void setContentView(View view) { 1866 getWindow().setContentView(view); 1867 initActionBar(); 1868 } 1869 1870 /** 1871 * Set the activity content to an explicit view. This view is placed 1872 * directly into the activity's view hierarchy. It can itself be a complex 1873 * view hierarchy. 1874 * 1875 * @param view The desired content to display. 1876 * @param params Layout parameters for the view. 1877 * 1878 * @see #setContentView(android.view.View) 1879 * @see #setContentView(int) 1880 */ 1881 public void setContentView(View view, ViewGroup.LayoutParams params) { 1882 getWindow().setContentView(view, params); 1883 initActionBar(); 1884 } 1885 1886 /** 1887 * Add an additional content view to the activity. Added after any existing 1888 * ones in the activity -- existing views are NOT removed. 1889 * 1890 * @param view The desired content to display. 1891 * @param params Layout parameters for the view. 1892 */ 1893 public void addContentView(View view, ViewGroup.LayoutParams params) { 1894 getWindow().addContentView(view, params); 1895 initActionBar(); 1896 } 1897 1898 /** 1899 * Sets whether this activity is finished when touched outside its window's 1900 * bounds. 1901 */ 1902 public void setFinishOnTouchOutside(boolean finish) { 1903 mWindow.setCloseOnTouchOutside(finish); 1904 } 1905 1906 /** 1907 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1908 * keys. 1909 * 1910 * @see #setDefaultKeyMode 1911 */ 1912 static public final int DEFAULT_KEYS_DISABLE = 0; 1913 /** 1914 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1915 * key handling. 1916 * 1917 * @see #setDefaultKeyMode 1918 */ 1919 static public final int DEFAULT_KEYS_DIALER = 1; 1920 /** 1921 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1922 * default key handling. 1923 * 1924 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1925 * 1926 * @see #setDefaultKeyMode 1927 */ 1928 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1929 /** 1930 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1931 * will start an application-defined search. (If the application or activity does not 1932 * actually define a search, the the keys will be ignored.) 1933 * 1934 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1935 * 1936 * @see #setDefaultKeyMode 1937 */ 1938 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1939 1940 /** 1941 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1942 * will start a global search (typically web search, but some platforms may define alternate 1943 * methods for global search) 1944 * 1945 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1946 * 1947 * @see #setDefaultKeyMode 1948 */ 1949 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1950 1951 /** 1952 * Select the default key handling for this activity. This controls what 1953 * will happen to key events that are not otherwise handled. The default 1954 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1955 * floor. Other modes allow you to launch the dialer 1956 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1957 * menu without requiring the menu key be held down 1958 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1959 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1960 * 1961 * <p>Note that the mode selected here does not impact the default 1962 * handling of system keys, such as the "back" and "menu" keys, and your 1963 * activity and its views always get a first chance to receive and handle 1964 * all application keys. 1965 * 1966 * @param mode The desired default key mode constant. 1967 * 1968 * @see #DEFAULT_KEYS_DISABLE 1969 * @see #DEFAULT_KEYS_DIALER 1970 * @see #DEFAULT_KEYS_SHORTCUT 1971 * @see #DEFAULT_KEYS_SEARCH_LOCAL 1972 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 1973 * @see #onKeyDown 1974 */ 1975 public final void setDefaultKeyMode(int mode) { 1976 mDefaultKeyMode = mode; 1977 1978 // Some modes use a SpannableStringBuilder to track & dispatch input events 1979 // This list must remain in sync with the switch in onKeyDown() 1980 switch (mode) { 1981 case DEFAULT_KEYS_DISABLE: 1982 case DEFAULT_KEYS_SHORTCUT: 1983 mDefaultKeySsb = null; // not used in these modes 1984 break; 1985 case DEFAULT_KEYS_DIALER: 1986 case DEFAULT_KEYS_SEARCH_LOCAL: 1987 case DEFAULT_KEYS_SEARCH_GLOBAL: 1988 mDefaultKeySsb = new SpannableStringBuilder(); 1989 Selection.setSelection(mDefaultKeySsb,0); 1990 break; 1991 default: 1992 throw new IllegalArgumentException(); 1993 } 1994 } 1995 1996 /** 1997 * Called when a key was pressed down and not handled by any of the views 1998 * inside of the activity. So, for example, key presses while the cursor 1999 * is inside a TextView will not trigger the event (unless it is a navigation 2000 * to another object) because TextView handles its own key presses. 2001 * 2002 * <p>If the focused view didn't want this event, this method is called. 2003 * 2004 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2005 * by calling {@link #onBackPressed()}, though the behavior varies based 2006 * on the application compatibility mode: for 2007 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2008 * it will set up the dispatch to call {@link #onKeyUp} where the action 2009 * will be performed; for earlier applications, it will perform the 2010 * action immediately in on-down, as those versions of the platform 2011 * behaved. 2012 * 2013 * <p>Other additional default key handling may be performed 2014 * if configured with {@link #setDefaultKeyMode}. 2015 * 2016 * @return Return <code>true</code> to prevent this event from being propagated 2017 * further, or <code>false</code> to indicate that you have not handled 2018 * this event and it should continue to be propagated. 2019 * @see #onKeyUp 2020 * @see android.view.KeyEvent 2021 */ 2022 public boolean onKeyDown(int keyCode, KeyEvent event) { 2023 if (keyCode == KeyEvent.KEYCODE_BACK) { 2024 if (getApplicationInfo().targetSdkVersion 2025 >= Build.VERSION_CODES.ECLAIR) { 2026 event.startTracking(); 2027 } else { 2028 onBackPressed(); 2029 } 2030 return true; 2031 } 2032 2033 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2034 return false; 2035 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2036 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 2037 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2038 return true; 2039 } 2040 return false; 2041 } else { 2042 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2043 boolean clearSpannable = false; 2044 boolean handled; 2045 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2046 clearSpannable = true; 2047 handled = false; 2048 } else { 2049 handled = TextKeyListener.getInstance().onKeyDown( 2050 null, mDefaultKeySsb, keyCode, event); 2051 if (handled && mDefaultKeySsb.length() > 0) { 2052 // something useable has been typed - dispatch it now. 2053 2054 final String str = mDefaultKeySsb.toString(); 2055 clearSpannable = true; 2056 2057 switch (mDefaultKeyMode) { 2058 case DEFAULT_KEYS_DIALER: 2059 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2060 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2061 startActivity(intent); 2062 break; 2063 case DEFAULT_KEYS_SEARCH_LOCAL: 2064 startSearch(str, false, null, false); 2065 break; 2066 case DEFAULT_KEYS_SEARCH_GLOBAL: 2067 startSearch(str, false, null, true); 2068 break; 2069 } 2070 } 2071 } 2072 if (clearSpannable) { 2073 mDefaultKeySsb.clear(); 2074 mDefaultKeySsb.clearSpans(); 2075 Selection.setSelection(mDefaultKeySsb,0); 2076 } 2077 return handled; 2078 } 2079 } 2080 2081 /** 2082 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2083 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2084 * the event). 2085 */ 2086 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2087 return false; 2088 } 2089 2090 /** 2091 * Called when a key was released and not handled by any of the views 2092 * inside of the activity. So, for example, key presses while the cursor 2093 * is inside a TextView will not trigger the event (unless it is a navigation 2094 * to another object) because TextView handles its own key presses. 2095 * 2096 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2097 * and go back. 2098 * 2099 * @return Return <code>true</code> to prevent this event from being propagated 2100 * further, or <code>false</code> to indicate that you have not handled 2101 * this event and it should continue to be propagated. 2102 * @see #onKeyDown 2103 * @see KeyEvent 2104 */ 2105 public boolean onKeyUp(int keyCode, KeyEvent event) { 2106 if (getApplicationInfo().targetSdkVersion 2107 >= Build.VERSION_CODES.ECLAIR) { 2108 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2109 && !event.isCanceled()) { 2110 onBackPressed(); 2111 return true; 2112 } 2113 } 2114 return false; 2115 } 2116 2117 /** 2118 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2119 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2120 * the event). 2121 */ 2122 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2123 return false; 2124 } 2125 2126 /** 2127 * Called when the activity has detected the user's press of the back 2128 * key. The default implementation simply finishes the current activity, 2129 * but you can override this to do whatever you want. 2130 */ 2131 public void onBackPressed() { 2132 if (!mFragments.popBackStackImmediate()) { 2133 finish(); 2134 } 2135 } 2136 2137 /** 2138 * Called when a key shortcut event is not handled by any of the views in the Activity. 2139 * Override this method to implement global key shortcuts for the Activity. 2140 * Key shortcuts can also be implemented by setting the 2141 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2142 * 2143 * @param keyCode The value in event.getKeyCode(). 2144 * @param event Description of the key event. 2145 * @return True if the key shortcut was handled. 2146 */ 2147 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2148 return false; 2149 } 2150 2151 /** 2152 * Called when a touch screen event was not handled by any of the views 2153 * under it. This is most useful to process touch events that happen 2154 * outside of your window bounds, where there is no view to receive it. 2155 * 2156 * @param event The touch screen event being processed. 2157 * 2158 * @return Return true if you have consumed the event, false if you haven't. 2159 * The default implementation always returns false. 2160 */ 2161 public boolean onTouchEvent(MotionEvent event) { 2162 if (mWindow.shouldCloseOnTouch(this, event)) { 2163 finish(); 2164 return true; 2165 } 2166 2167 return false; 2168 } 2169 2170 /** 2171 * Called when the trackball was moved and not handled by any of the 2172 * views inside of the activity. So, for example, if the trackball moves 2173 * while focus is on a button, you will receive a call here because 2174 * buttons do not normally do anything with trackball events. The call 2175 * here happens <em>before</em> trackball movements are converted to 2176 * DPAD key events, which then get sent back to the view hierarchy, and 2177 * will be processed at the point for things like focus navigation. 2178 * 2179 * @param event The trackball event being processed. 2180 * 2181 * @return Return true if you have consumed the event, false if you haven't. 2182 * The default implementation always returns false. 2183 */ 2184 public boolean onTrackballEvent(MotionEvent event) { 2185 return false; 2186 } 2187 2188 /** 2189 * Called when a generic motion event was not handled by any of the 2190 * views inside of the activity. 2191 * <p> 2192 * Generic motion events describe joystick movements, mouse hovers, track pad 2193 * touches, scroll wheel movements and other input events. The 2194 * {@link MotionEvent#getSource() source} of the motion event specifies 2195 * the class of input that was received. Implementations of this method 2196 * must examine the bits in the source before processing the event. 2197 * The following code example shows how this is done. 2198 * </p><p> 2199 * Generic motion events with source class 2200 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2201 * are delivered to the view under the pointer. All other generic motion events are 2202 * delivered to the focused view. 2203 * </p><p> 2204 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2205 * handle this event. 2206 * </p> 2207 * 2208 * @param event The generic motion event being processed. 2209 * 2210 * @return Return true if you have consumed the event, false if you haven't. 2211 * The default implementation always returns false. 2212 */ 2213 public boolean onGenericMotionEvent(MotionEvent event) { 2214 return false; 2215 } 2216 2217 /** 2218 * Called whenever a key, touch, or trackball event is dispatched to the 2219 * activity. Implement this method if you wish to know that the user has 2220 * interacted with the device in some way while your activity is running. 2221 * This callback and {@link #onUserLeaveHint} are intended to help 2222 * activities manage status bar notifications intelligently; specifically, 2223 * for helping activities determine the proper time to cancel a notfication. 2224 * 2225 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2226 * be accompanied by calls to {@link #onUserInteraction}. This 2227 * ensures that your activity will be told of relevant user activity such 2228 * as pulling down the notification pane and touching an item there. 2229 * 2230 * <p>Note that this callback will be invoked for the touch down action 2231 * that begins a touch gesture, but may not be invoked for the touch-moved 2232 * and touch-up actions that follow. 2233 * 2234 * @see #onUserLeaveHint() 2235 */ 2236 public void onUserInteraction() { 2237 } 2238 2239 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2240 // Update window manager if: we have a view, that view is 2241 // attached to its parent (which will be a RootView), and 2242 // this activity is not embedded. 2243 if (mParent == null) { 2244 View decor = mDecor; 2245 if (decor != null && decor.getParent() != null) { 2246 getWindowManager().updateViewLayout(decor, params); 2247 } 2248 } 2249 } 2250 2251 public void onContentChanged() { 2252 } 2253 2254 /** 2255 * Called when the current {@link Window} of the activity gains or loses 2256 * focus. This is the best indicator of whether this activity is visible 2257 * to the user. The default implementation clears the key tracking 2258 * state, so should always be called. 2259 * 2260 * <p>Note that this provides information about global focus state, which 2261 * is managed independently of activity lifecycles. As such, while focus 2262 * changes will generally have some relation to lifecycle changes (an 2263 * activity that is stopped will not generally get window focus), you 2264 * should not rely on any particular order between the callbacks here and 2265 * those in the other lifecycle methods such as {@link #onResume}. 2266 * 2267 * <p>As a general rule, however, a resumed activity will have window 2268 * focus... unless it has displayed other dialogs or popups that take 2269 * input focus, in which case the activity itself will not have focus 2270 * when the other windows have it. Likewise, the system may display 2271 * system-level windows (such as the status bar notification panel or 2272 * a system alert) which will temporarily take window input focus without 2273 * pausing the foreground activity. 2274 * 2275 * @param hasFocus Whether the window of this activity has focus. 2276 * 2277 * @see #hasWindowFocus() 2278 * @see #onResume 2279 * @see View#onWindowFocusChanged(boolean) 2280 */ 2281 public void onWindowFocusChanged(boolean hasFocus) { 2282 } 2283 2284 /** 2285 * Called when the main window associated with the activity has been 2286 * attached to the window manager. 2287 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2288 * for more information. 2289 * @see View#onAttachedToWindow 2290 */ 2291 public void onAttachedToWindow() { 2292 } 2293 2294 /** 2295 * Called when the main window associated with the activity has been 2296 * detached from the window manager. 2297 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2298 * for more information. 2299 * @see View#onDetachedFromWindow 2300 */ 2301 public void onDetachedFromWindow() { 2302 } 2303 2304 /** 2305 * Returns true if this activity's <em>main</em> window currently has window focus. 2306 * Note that this is not the same as the view itself having focus. 2307 * 2308 * @return True if this activity's main window currently has window focus. 2309 * 2310 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2311 */ 2312 public boolean hasWindowFocus() { 2313 Window w = getWindow(); 2314 if (w != null) { 2315 View d = w.getDecorView(); 2316 if (d != null) { 2317 return d.hasWindowFocus(); 2318 } 2319 } 2320 return false; 2321 } 2322 2323 /** 2324 * Called to process key events. You can override this to intercept all 2325 * key events before they are dispatched to the window. Be sure to call 2326 * this implementation for key events that should be handled normally. 2327 * 2328 * @param event The key event. 2329 * 2330 * @return boolean Return true if this event was consumed. 2331 */ 2332 public boolean dispatchKeyEvent(KeyEvent event) { 2333 onUserInteraction(); 2334 Window win = getWindow(); 2335 if (win.superDispatchKeyEvent(event)) { 2336 return true; 2337 } 2338 View decor = mDecor; 2339 if (decor == null) decor = win.getDecorView(); 2340 return event.dispatch(this, decor != null 2341 ? decor.getKeyDispatcherState() : null, this); 2342 } 2343 2344 /** 2345 * Called to process a key shortcut event. 2346 * You can override this to intercept all key shortcut events before they are 2347 * dispatched to the window. Be sure to call this implementation for key shortcut 2348 * events that should be handled normally. 2349 * 2350 * @param event The key shortcut event. 2351 * @return True if this event was consumed. 2352 */ 2353 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 2354 onUserInteraction(); 2355 if (getWindow().superDispatchKeyShortcutEvent(event)) { 2356 return true; 2357 } 2358 return onKeyShortcut(event.getKeyCode(), event); 2359 } 2360 2361 /** 2362 * Called to process touch screen events. You can override this to 2363 * intercept all touch screen events before they are dispatched to the 2364 * window. Be sure to call this implementation for touch screen events 2365 * that should be handled normally. 2366 * 2367 * @param ev The touch screen event. 2368 * 2369 * @return boolean Return true if this event was consumed. 2370 */ 2371 public boolean dispatchTouchEvent(MotionEvent ev) { 2372 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2373 onUserInteraction(); 2374 } 2375 if (getWindow().superDispatchTouchEvent(ev)) { 2376 return true; 2377 } 2378 return onTouchEvent(ev); 2379 } 2380 2381 /** 2382 * Called to process trackball events. You can override this to 2383 * intercept all trackball events before they are dispatched to the 2384 * window. Be sure to call this implementation for trackball events 2385 * that should be handled normally. 2386 * 2387 * @param ev The trackball event. 2388 * 2389 * @return boolean Return true if this event was consumed. 2390 */ 2391 public boolean dispatchTrackballEvent(MotionEvent ev) { 2392 onUserInteraction(); 2393 if (getWindow().superDispatchTrackballEvent(ev)) { 2394 return true; 2395 } 2396 return onTrackballEvent(ev); 2397 } 2398 2399 /** 2400 * Called to process generic motion events. You can override this to 2401 * intercept all generic motion events before they are dispatched to the 2402 * window. Be sure to call this implementation for generic motion events 2403 * that should be handled normally. 2404 * 2405 * @param ev The generic motion event. 2406 * 2407 * @return boolean Return true if this event was consumed. 2408 */ 2409 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 2410 onUserInteraction(); 2411 if (getWindow().superDispatchGenericMotionEvent(ev)) { 2412 return true; 2413 } 2414 return onGenericMotionEvent(ev); 2415 } 2416 2417 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2418 event.setClassName(getClass().getName()); 2419 event.setPackageName(getPackageName()); 2420 2421 LayoutParams params = getWindow().getAttributes(); 2422 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2423 (params.height == LayoutParams.MATCH_PARENT); 2424 event.setFullScreen(isFullScreen); 2425 2426 CharSequence title = getTitle(); 2427 if (!TextUtils.isEmpty(title)) { 2428 event.getText().add(title); 2429 } 2430 2431 return true; 2432 } 2433 2434 /** 2435 * Default implementation of 2436 * {@link android.view.Window.Callback#onCreatePanelView} 2437 * for activities. This 2438 * simply returns null so that all panel sub-windows will have the default 2439 * menu behavior. 2440 */ 2441 public View onCreatePanelView(int featureId) { 2442 return null; 2443 } 2444 2445 /** 2446 * Default implementation of 2447 * {@link android.view.Window.Callback#onCreatePanelMenu} 2448 * for activities. This calls through to the new 2449 * {@link #onCreateOptionsMenu} method for the 2450 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2451 * so that subclasses of Activity don't need to deal with feature codes. 2452 */ 2453 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2454 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2455 boolean show = onCreateOptionsMenu(menu); 2456 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 2457 return show; 2458 } 2459 return false; 2460 } 2461 2462 /** 2463 * Default implementation of 2464 * {@link android.view.Window.Callback#onPreparePanel} 2465 * for activities. This 2466 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2467 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2468 * panel, so that subclasses of 2469 * Activity don't need to deal with feature codes. 2470 */ 2471 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2472 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2473 boolean goforit = onPrepareOptionsMenu(menu); 2474 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 2475 return goforit && menu.hasVisibleItems(); 2476 } 2477 return true; 2478 } 2479 2480 /** 2481 * {@inheritDoc} 2482 * 2483 * @return The default implementation returns true. 2484 */ 2485 public boolean onMenuOpened(int featureId, Menu menu) { 2486 if (featureId == Window.FEATURE_ACTION_BAR) { 2487 initActionBar(); 2488 if (mActionBar != null) { 2489 mActionBar.dispatchMenuVisibilityChanged(true); 2490 } else { 2491 Log.e(TAG, "Tried to open action bar menu with no action bar"); 2492 } 2493 } 2494 return true; 2495 } 2496 2497 /** 2498 * Default implementation of 2499 * {@link android.view.Window.Callback#onMenuItemSelected} 2500 * for activities. This calls through to the new 2501 * {@link #onOptionsItemSelected} method for the 2502 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2503 * panel, so that subclasses of 2504 * Activity don't need to deal with feature codes. 2505 */ 2506 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2507 switch (featureId) { 2508 case Window.FEATURE_OPTIONS_PANEL: 2509 // Put event logging here so it gets called even if subclass 2510 // doesn't call through to superclass's implmeentation of each 2511 // of these methods below 2512 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2513 if (onOptionsItemSelected(item)) { 2514 return true; 2515 } 2516 return mFragments.dispatchOptionsItemSelected(item); 2517 2518 case Window.FEATURE_CONTEXT_MENU: 2519 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2520 if (onContextItemSelected(item)) { 2521 return true; 2522 } 2523 return mFragments.dispatchContextItemSelected(item); 2524 2525 default: 2526 return false; 2527 } 2528 } 2529 2530 /** 2531 * Default implementation of 2532 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2533 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2534 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2535 * so that subclasses of Activity don't need to deal with feature codes. 2536 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2537 * {@link #onContextMenuClosed(Menu)} will be called. 2538 */ 2539 public void onPanelClosed(int featureId, Menu menu) { 2540 switch (featureId) { 2541 case Window.FEATURE_OPTIONS_PANEL: 2542 mFragments.dispatchOptionsMenuClosed(menu); 2543 onOptionsMenuClosed(menu); 2544 break; 2545 2546 case Window.FEATURE_CONTEXT_MENU: 2547 onContextMenuClosed(menu); 2548 break; 2549 2550 case Window.FEATURE_ACTION_BAR: 2551 initActionBar(); 2552 mActionBar.dispatchMenuVisibilityChanged(false); 2553 break; 2554 } 2555 } 2556 2557 /** 2558 * Declare that the options menu has changed, so should be recreated. 2559 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 2560 * time it needs to be displayed. 2561 */ 2562 public void invalidateOptionsMenu() { 2563 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 2564 } 2565 2566 /** 2567 * Initialize the contents of the Activity's standard options menu. You 2568 * should place your menu items in to <var>menu</var>. 2569 * 2570 * <p>This is only called once, the first time the options menu is 2571 * displayed. To update the menu every time it is displayed, see 2572 * {@link #onPrepareOptionsMenu}. 2573 * 2574 * <p>The default implementation populates the menu with standard system 2575 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2576 * they will be correctly ordered with application-defined menu items. 2577 * Deriving classes should always call through to the base implementation. 2578 * 2579 * <p>You can safely hold on to <var>menu</var> (and any items created 2580 * from it), making modifications to it as desired, until the next 2581 * time onCreateOptionsMenu() is called. 2582 * 2583 * <p>When you add items to the menu, you can implement the Activity's 2584 * {@link #onOptionsItemSelected} method to handle them there. 2585 * 2586 * @param menu The options menu in which you place your items. 2587 * 2588 * @return You must return true for the menu to be displayed; 2589 * if you return false it will not be shown. 2590 * 2591 * @see #onPrepareOptionsMenu 2592 * @see #onOptionsItemSelected 2593 */ 2594 public boolean onCreateOptionsMenu(Menu menu) { 2595 if (mParent != null) { 2596 return mParent.onCreateOptionsMenu(menu); 2597 } 2598 return true; 2599 } 2600 2601 /** 2602 * Prepare the Screen's standard options menu to be displayed. This is 2603 * called right before the menu is shown, every time it is shown. You can 2604 * use this method to efficiently enable/disable items or otherwise 2605 * dynamically modify the contents. 2606 * 2607 * <p>The default implementation updates the system menu items based on the 2608 * activity's state. Deriving classes should always call through to the 2609 * base class implementation. 2610 * 2611 * @param menu The options menu as last shown or first initialized by 2612 * onCreateOptionsMenu(). 2613 * 2614 * @return You must return true for the menu to be displayed; 2615 * if you return false it will not be shown. 2616 * 2617 * @see #onCreateOptionsMenu 2618 */ 2619 public boolean onPrepareOptionsMenu(Menu menu) { 2620 if (mParent != null) { 2621 return mParent.onPrepareOptionsMenu(menu); 2622 } 2623 return true; 2624 } 2625 2626 /** 2627 * This hook is called whenever an item in your options menu is selected. 2628 * The default implementation simply returns false to have the normal 2629 * processing happen (calling the item's Runnable or sending a message to 2630 * its Handler as appropriate). You can use this method for any items 2631 * for which you would like to do processing without those other 2632 * facilities. 2633 * 2634 * <p>Derived classes should call through to the base class for it to 2635 * perform the default menu handling. 2636 * 2637 * @param item The menu item that was selected. 2638 * 2639 * @return boolean Return false to allow normal menu processing to 2640 * proceed, true to consume it here. 2641 * 2642 * @see #onCreateOptionsMenu 2643 */ 2644 public boolean onOptionsItemSelected(MenuItem item) { 2645 if (mParent != null) { 2646 return mParent.onOptionsItemSelected(item); 2647 } 2648 return false; 2649 } 2650 2651 /** 2652 * This hook is called whenever the options menu is being closed (either by the user canceling 2653 * the menu with the back/menu button, or when an item is selected). 2654 * 2655 * @param menu The options menu as last shown or first initialized by 2656 * onCreateOptionsMenu(). 2657 */ 2658 public void onOptionsMenuClosed(Menu menu) { 2659 if (mParent != null) { 2660 mParent.onOptionsMenuClosed(menu); 2661 } 2662 } 2663 2664 /** 2665 * Programmatically opens the options menu. If the options menu is already 2666 * open, this method does nothing. 2667 */ 2668 public void openOptionsMenu() { 2669 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2670 } 2671 2672 /** 2673 * Progammatically closes the options menu. If the options menu is already 2674 * closed, this method does nothing. 2675 */ 2676 public void closeOptionsMenu() { 2677 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2678 } 2679 2680 /** 2681 * Called when a context menu for the {@code view} is about to be shown. 2682 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2683 * time the context menu is about to be shown and should be populated for 2684 * the view (or item inside the view for {@link AdapterView} subclasses, 2685 * this can be found in the {@code menuInfo})). 2686 * <p> 2687 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2688 * item has been selected. 2689 * <p> 2690 * It is not safe to hold onto the context menu after this method returns. 2691 * {@inheritDoc} 2692 */ 2693 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2694 } 2695 2696 /** 2697 * Registers a context menu to be shown for the given view (multiple views 2698 * can show the context menu). This method will set the 2699 * {@link OnCreateContextMenuListener} on the view to this activity, so 2700 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2701 * called when it is time to show the context menu. 2702 * 2703 * @see #unregisterForContextMenu(View) 2704 * @param view The view that should show a context menu. 2705 */ 2706 public void registerForContextMenu(View view) { 2707 view.setOnCreateContextMenuListener(this); 2708 } 2709 2710 /** 2711 * Prevents a context menu to be shown for the given view. This method will remove the 2712 * {@link OnCreateContextMenuListener} on the view. 2713 * 2714 * @see #registerForContextMenu(View) 2715 * @param view The view that should stop showing a context menu. 2716 */ 2717 public void unregisterForContextMenu(View view) { 2718 view.setOnCreateContextMenuListener(null); 2719 } 2720 2721 /** 2722 * Programmatically opens the context menu for a particular {@code view}. 2723 * The {@code view} should have been added via 2724 * {@link #registerForContextMenu(View)}. 2725 * 2726 * @param view The view to show the context menu for. 2727 */ 2728 public void openContextMenu(View view) { 2729 view.showContextMenu(); 2730 } 2731 2732 /** 2733 * Programmatically closes the most recently opened context menu, if showing. 2734 */ 2735 public void closeContextMenu() { 2736 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2737 } 2738 2739 /** 2740 * This hook is called whenever an item in a context menu is selected. The 2741 * default implementation simply returns false to have the normal processing 2742 * happen (calling the item's Runnable or sending a message to its Handler 2743 * as appropriate). You can use this method for any items for which you 2744 * would like to do processing without those other facilities. 2745 * <p> 2746 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2747 * View that added this menu item. 2748 * <p> 2749 * Derived classes should call through to the base class for it to perform 2750 * the default menu handling. 2751 * 2752 * @param item The context menu item that was selected. 2753 * @return boolean Return false to allow normal context menu processing to 2754 * proceed, true to consume it here. 2755 */ 2756 public boolean onContextItemSelected(MenuItem item) { 2757 if (mParent != null) { 2758 return mParent.onContextItemSelected(item); 2759 } 2760 return false; 2761 } 2762 2763 /** 2764 * This hook is called whenever the context menu is being closed (either by 2765 * the user canceling the menu with the back/menu button, or when an item is 2766 * selected). 2767 * 2768 * @param menu The context menu that is being closed. 2769 */ 2770 public void onContextMenuClosed(Menu menu) { 2771 if (mParent != null) { 2772 mParent.onContextMenuClosed(menu); 2773 } 2774 } 2775 2776 /** 2777 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2778 */ 2779 @Deprecated 2780 protected Dialog onCreateDialog(int id) { 2781 return null; 2782 } 2783 2784 /** 2785 * Callback for creating dialogs that are managed (saved and restored) for you 2786 * by the activity. The default implementation calls through to 2787 * {@link #onCreateDialog(int)} for compatibility. 2788 * 2789 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2790 * or later, consider instead using a {@link DialogFragment} instead.</em> 2791 * 2792 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2793 * this method the first time, and hang onto it thereafter. Any dialog 2794 * that is created by this method will automatically be saved and restored 2795 * for you, including whether it is showing. 2796 * 2797 * <p>If you would like the activity to manage saving and restoring dialogs 2798 * for you, you should override this method and handle any ids that are 2799 * passed to {@link #showDialog}. 2800 * 2801 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2802 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2803 * 2804 * @param id The id of the dialog. 2805 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2806 * @return The dialog. If you return null, the dialog will not be created. 2807 * 2808 * @see #onPrepareDialog(int, Dialog, Bundle) 2809 * @see #showDialog(int, Bundle) 2810 * @see #dismissDialog(int) 2811 * @see #removeDialog(int) 2812 * 2813 * @deprecated Use the new {@link DialogFragment} class with 2814 * {@link FragmentManager} instead; this is also 2815 * available on older platforms through the Android compatibility package. 2816 */ 2817 @Deprecated 2818 protected Dialog onCreateDialog(int id, Bundle args) { 2819 return onCreateDialog(id); 2820 } 2821 2822 /** 2823 * @deprecated Old no-arguments version of 2824 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2825 */ 2826 @Deprecated 2827 protected void onPrepareDialog(int id, Dialog dialog) { 2828 dialog.setOwnerActivity(this); 2829 } 2830 2831 /** 2832 * Provides an opportunity to prepare a managed dialog before it is being 2833 * shown. The default implementation calls through to 2834 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2835 * 2836 * <p> 2837 * Override this if you need to update a managed dialog based on the state 2838 * of the application each time it is shown. For example, a time picker 2839 * dialog might want to be updated with the current time. You should call 2840 * through to the superclass's implementation. The default implementation 2841 * will set this Activity as the owner activity on the Dialog. 2842 * 2843 * @param id The id of the managed dialog. 2844 * @param dialog The dialog. 2845 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2846 * @see #onCreateDialog(int, Bundle) 2847 * @see #showDialog(int) 2848 * @see #dismissDialog(int) 2849 * @see #removeDialog(int) 2850 * 2851 * @deprecated Use the new {@link DialogFragment} class with 2852 * {@link FragmentManager} instead; this is also 2853 * available on older platforms through the Android compatibility package. 2854 */ 2855 @Deprecated 2856 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 2857 onPrepareDialog(id, dialog); 2858 } 2859 2860 /** 2861 * Simple version of {@link #showDialog(int, Bundle)} that does not 2862 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 2863 * with null arguments. 2864 * 2865 * @deprecated Use the new {@link DialogFragment} class with 2866 * {@link FragmentManager} instead; this is also 2867 * available on older platforms through the Android compatibility package. 2868 */ 2869 @Deprecated 2870 public final void showDialog(int id) { 2871 showDialog(id, null); 2872 } 2873 2874 /** 2875 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 2876 * will be made with the same id the first time this is called for a given 2877 * id. From thereafter, the dialog will be automatically saved and restored. 2878 * 2879 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2880 * or later, consider instead using a {@link DialogFragment} instead.</em> 2881 * 2882 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 2883 * be made to provide an opportunity to do any timely preparation. 2884 * 2885 * @param id The id of the managed dialog. 2886 * @param args Arguments to pass through to the dialog. These will be saved 2887 * and restored for you. Note that if the dialog is already created, 2888 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 2889 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 2890 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 2891 * @return Returns true if the Dialog was created; false is returned if 2892 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 2893 * 2894 * @see Dialog 2895 * @see #onCreateDialog(int, Bundle) 2896 * @see #onPrepareDialog(int, Dialog, Bundle) 2897 * @see #dismissDialog(int) 2898 * @see #removeDialog(int) 2899 * 2900 * @deprecated Use the new {@link DialogFragment} class with 2901 * {@link FragmentManager} instead; this is also 2902 * available on older platforms through the Android compatibility package. 2903 */ 2904 @Deprecated 2905 public final boolean showDialog(int id, Bundle args) { 2906 if (mManagedDialogs == null) { 2907 mManagedDialogs = new SparseArray<ManagedDialog>(); 2908 } 2909 ManagedDialog md = mManagedDialogs.get(id); 2910 if (md == null) { 2911 md = new ManagedDialog(); 2912 md.mDialog = createDialog(id, null, args); 2913 if (md.mDialog == null) { 2914 return false; 2915 } 2916 mManagedDialogs.put(id, md); 2917 } 2918 2919 md.mArgs = args; 2920 onPrepareDialog(id, md.mDialog, args); 2921 md.mDialog.show(); 2922 return true; 2923 } 2924 2925 /** 2926 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 2927 * 2928 * @param id The id of the managed dialog. 2929 * 2930 * @throws IllegalArgumentException if the id was not previously shown via 2931 * {@link #showDialog(int)}. 2932 * 2933 * @see #onCreateDialog(int, Bundle) 2934 * @see #onPrepareDialog(int, Dialog, Bundle) 2935 * @see #showDialog(int) 2936 * @see #removeDialog(int) 2937 * 2938 * @deprecated Use the new {@link DialogFragment} class with 2939 * {@link FragmentManager} instead; this is also 2940 * available on older platforms through the Android compatibility package. 2941 */ 2942 @Deprecated 2943 public final void dismissDialog(int id) { 2944 if (mManagedDialogs == null) { 2945 throw missingDialog(id); 2946 } 2947 2948 final ManagedDialog md = mManagedDialogs.get(id); 2949 if (md == null) { 2950 throw missingDialog(id); 2951 } 2952 md.mDialog.dismiss(); 2953 } 2954 2955 /** 2956 * Creates an exception to throw if a user passed in a dialog id that is 2957 * unexpected. 2958 */ 2959 private IllegalArgumentException missingDialog(int id) { 2960 return new IllegalArgumentException("no dialog with id " + id + " was ever " 2961 + "shown via Activity#showDialog"); 2962 } 2963 2964 /** 2965 * Removes any internal references to a dialog managed by this Activity. 2966 * If the dialog is showing, it will dismiss it as part of the clean up. 2967 * 2968 * <p>This can be useful if you know that you will never show a dialog again and 2969 * want to avoid the overhead of saving and restoring it in the future. 2970 * 2971 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 2972 * will not throw an exception if you try to remove an ID that does not 2973 * currently have an associated dialog.</p> 2974 * 2975 * @param id The id of the managed dialog. 2976 * 2977 * @see #onCreateDialog(int, Bundle) 2978 * @see #onPrepareDialog(int, Dialog, Bundle) 2979 * @see #showDialog(int) 2980 * @see #dismissDialog(int) 2981 * 2982 * @deprecated Use the new {@link DialogFragment} class with 2983 * {@link FragmentManager} instead; this is also 2984 * available on older platforms through the Android compatibility package. 2985 */ 2986 @Deprecated 2987 public final void removeDialog(int id) { 2988 if (mManagedDialogs != null) { 2989 final ManagedDialog md = mManagedDialogs.get(id); 2990 if (md != null) { 2991 md.mDialog.dismiss(); 2992 mManagedDialogs.remove(id); 2993 } 2994 } 2995 } 2996 2997 /** 2998 * This hook is called when the user signals the desire to start a search. 2999 * 3000 * <p>You can use this function as a simple way to launch the search UI, in response to a 3001 * menu item, search button, or other widgets within your activity. Unless overidden, 3002 * calling this function is the same as calling 3003 * {@link #startSearch startSearch(null, false, null, false)}, which launches 3004 * search for the current activity as specified in its manifest, see {@link SearchManager}. 3005 * 3006 * <p>You can override this function to force global search, e.g. in response to a dedicated 3007 * search key, or to block search entirely (by simply returning false). 3008 * 3009 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 3010 * The default implementation always returns {@code true}. 3011 * 3012 * @see android.app.SearchManager 3013 */ 3014 public boolean onSearchRequested() { 3015 startSearch(null, false, null, false); 3016 return true; 3017 } 3018 3019 /** 3020 * This hook is called to launch the search UI. 3021 * 3022 * <p>It is typically called from onSearchRequested(), either directly from 3023 * Activity.onSearchRequested() or from an overridden version in any given 3024 * Activity. If your goal is simply to activate search, it is preferred to call 3025 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 3026 * is to inject specific data such as context data, it is preferred to <i>override</i> 3027 * onSearchRequested(), so that any callers to it will benefit from the override. 3028 * 3029 * @param initialQuery Any non-null non-empty string will be inserted as 3030 * pre-entered text in the search query box. 3031 * @param selectInitialQuery If true, the intial query will be preselected, which means that 3032 * any further typing will replace it. This is useful for cases where an entire pre-formed 3033 * query is being inserted. If false, the selection point will be placed at the end of the 3034 * inserted query. This is useful when the inserted query is text that the user entered, 3035 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 3036 * if initialQuery is a non-empty string.</i> 3037 * @param appSearchData An application can insert application-specific 3038 * context here, in order to improve quality or specificity of its own 3039 * searches. This data will be returned with SEARCH intent(s). Null if 3040 * no extra data is required. 3041 * @param globalSearch If false, this will only launch the search that has been specifically 3042 * defined by the application (which is usually defined as a local search). If no default 3043 * search is defined in the current application or activity, global search will be launched. 3044 * If true, this will always launch a platform-global (e.g. web-based) search instead. 3045 * 3046 * @see android.app.SearchManager 3047 * @see #onSearchRequested 3048 */ 3049 public void startSearch(String initialQuery, boolean selectInitialQuery, 3050 Bundle appSearchData, boolean globalSearch) { 3051 ensureSearchManager(); 3052 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 3053 appSearchData, globalSearch); 3054 } 3055 3056 /** 3057 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 3058 * the search dialog. Made available for testing purposes. 3059 * 3060 * @param query The query to trigger. If empty, the request will be ignored. 3061 * @param appSearchData An application can insert application-specific 3062 * context here, in order to improve quality or specificity of its own 3063 * searches. This data will be returned with SEARCH intent(s). Null if 3064 * no extra data is required. 3065 */ 3066 public void triggerSearch(String query, Bundle appSearchData) { 3067 ensureSearchManager(); 3068 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 3069 } 3070 3071 /** 3072 * Request that key events come to this activity. Use this if your 3073 * activity has no views with focus, but the activity still wants 3074 * a chance to process key events. 3075 * 3076 * @see android.view.Window#takeKeyEvents 3077 */ 3078 public void takeKeyEvents(boolean get) { 3079 getWindow().takeKeyEvents(get); 3080 } 3081 3082 /** 3083 * Enable extended window features. This is a convenience for calling 3084 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 3085 * 3086 * @param featureId The desired feature as defined in 3087 * {@link android.view.Window}. 3088 * @return Returns true if the requested feature is supported and now 3089 * enabled. 3090 * 3091 * @see android.view.Window#requestFeature 3092 */ 3093 public final boolean requestWindowFeature(int featureId) { 3094 return getWindow().requestFeature(featureId); 3095 } 3096 3097 /** 3098 * Convenience for calling 3099 * {@link android.view.Window#setFeatureDrawableResource}. 3100 */ 3101 public final void setFeatureDrawableResource(int featureId, int resId) { 3102 getWindow().setFeatureDrawableResource(featureId, resId); 3103 } 3104 3105 /** 3106 * Convenience for calling 3107 * {@link android.view.Window#setFeatureDrawableUri}. 3108 */ 3109 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3110 getWindow().setFeatureDrawableUri(featureId, uri); 3111 } 3112 3113 /** 3114 * Convenience for calling 3115 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3116 */ 3117 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3118 getWindow().setFeatureDrawable(featureId, drawable); 3119 } 3120 3121 /** 3122 * Convenience for calling 3123 * {@link android.view.Window#setFeatureDrawableAlpha}. 3124 */ 3125 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3126 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3127 } 3128 3129 /** 3130 * Convenience for calling 3131 * {@link android.view.Window#getLayoutInflater}. 3132 */ 3133 public LayoutInflater getLayoutInflater() { 3134 return getWindow().getLayoutInflater(); 3135 } 3136 3137 /** 3138 * Returns a {@link MenuInflater} with this context. 3139 */ 3140 public MenuInflater getMenuInflater() { 3141 // Make sure that action views can get an appropriate theme. 3142 if (mMenuInflater == null) { 3143 initActionBar(); 3144 if (mActionBar != null) { 3145 mMenuInflater = new MenuInflater(mActionBar.getThemedContext()); 3146 } else { 3147 mMenuInflater = new MenuInflater(this); 3148 } 3149 } 3150 return mMenuInflater; 3151 } 3152 3153 @Override 3154 protected void onApplyThemeResource(Resources.Theme theme, int resid, 3155 boolean first) { 3156 if (mParent == null) { 3157 super.onApplyThemeResource(theme, resid, first); 3158 } else { 3159 try { 3160 theme.setTo(mParent.getTheme()); 3161 } catch (Exception e) { 3162 // Empty 3163 } 3164 theme.applyStyle(resid, false); 3165 } 3166 } 3167 3168 /** 3169 * Launch an activity for which you would like a result when it finished. 3170 * When this activity exits, your 3171 * onActivityResult() method will be called with the given requestCode. 3172 * Using a negative requestCode is the same as calling 3173 * {@link #startActivity} (the activity is not launched as a sub-activity). 3174 * 3175 * <p>Note that this method should only be used with Intent protocols 3176 * that are defined to return a result. In other protocols (such as 3177 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 3178 * not get the result when you expect. For example, if the activity you 3179 * are launching uses the singleTask launch mode, it will not run in your 3180 * task and thus you will immediately receive a cancel result. 3181 * 3182 * <p>As a special case, if you call startActivityForResult() with a requestCode 3183 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 3184 * activity, then your window will not be displayed until a result is 3185 * returned back from the started activity. This is to avoid visible 3186 * flickering when redirecting to another activity. 3187 * 3188 * <p>This method throws {@link android.content.ActivityNotFoundException} 3189 * if there was no Activity found to run the given Intent. 3190 * 3191 * @param intent The intent to start. 3192 * @param requestCode If >= 0, this code will be returned in 3193 * onActivityResult() when the activity exits. 3194 * 3195 * @throws android.content.ActivityNotFoundException 3196 * 3197 * @see #startActivity 3198 */ 3199 public void startActivityForResult(Intent intent, int requestCode) { 3200 if (mParent == null) { 3201 Instrumentation.ActivityResult ar = 3202 mInstrumentation.execStartActivity( 3203 this, mMainThread.getApplicationThread(), mToken, this, 3204 intent, requestCode); 3205 if (ar != null) { 3206 mMainThread.sendActivityResult( 3207 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 3208 ar.getResultData()); 3209 } 3210 if (requestCode >= 0) { 3211 // If this start is requesting a result, we can avoid making 3212 // the activity visible until the result is received. Setting 3213 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3214 // activity hidden during this time, to avoid flickering. 3215 // This can only be done when a result is requested because 3216 // that guarantees we will get information back when the 3217 // activity is finished, no matter what happens to it. 3218 mStartedActivity = true; 3219 } 3220 } else { 3221 mParent.startActivityFromChild(this, intent, requestCode); 3222 } 3223 } 3224 3225 /** 3226 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 3227 * to use a IntentSender to describe the activity to be started. If 3228 * the IntentSender is for an activity, that activity will be started 3229 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 3230 * here; otherwise, its associated action will be executed (such as 3231 * sending a broadcast) as if you had called 3232 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 3233 * 3234 * @param intent The IntentSender to launch. 3235 * @param requestCode If >= 0, this code will be returned in 3236 * onActivityResult() when the activity exits. 3237 * @param fillInIntent If non-null, this will be provided as the 3238 * intent parameter to {@link IntentSender#sendIntent}. 3239 * @param flagsMask Intent flags in the original IntentSender that you 3240 * would like to change. 3241 * @param flagsValues Desired values for any bits set in 3242 * <var>flagsMask</var> 3243 * @param extraFlags Always set to 0. 3244 */ 3245 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3246 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3247 throws IntentSender.SendIntentException { 3248 if (mParent == null) { 3249 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3250 flagsMask, flagsValues, this); 3251 } else { 3252 mParent.startIntentSenderFromChild(this, intent, requestCode, 3253 fillInIntent, flagsMask, flagsValues, extraFlags); 3254 } 3255 } 3256 3257 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 3258 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity) 3259 throws IntentSender.SendIntentException { 3260 try { 3261 String resolvedType = null; 3262 if (fillInIntent != null) { 3263 fillInIntent.setAllowFds(false); 3264 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 3265 } 3266 int result = ActivityManagerNative.getDefault() 3267 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 3268 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 3269 requestCode, flagsMask, flagsValues); 3270 if (result == IActivityManager.START_CANCELED) { 3271 throw new IntentSender.SendIntentException(); 3272 } 3273 Instrumentation.checkStartActivityResult(result, null); 3274 } catch (RemoteException e) { 3275 } 3276 if (requestCode >= 0) { 3277 // If this start is requesting a result, we can avoid making 3278 // the activity visible until the result is received. Setting 3279 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3280 // activity hidden during this time, to avoid flickering. 3281 // This can only be done when a result is requested because 3282 // that guarantees we will get information back when the 3283 // activity is finished, no matter what happens to it. 3284 mStartedActivity = true; 3285 } 3286 } 3287 3288 /** 3289 * Launch a new activity. You will not receive any information about when 3290 * the activity exits. This implementation overrides the base version, 3291 * providing information about 3292 * the activity performing the launch. Because of this additional 3293 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3294 * required; if not specified, the new activity will be added to the 3295 * task of the caller. 3296 * 3297 * <p>This method throws {@link android.content.ActivityNotFoundException} 3298 * if there was no Activity found to run the given Intent. 3299 * 3300 * @param intent The intent to start. 3301 * 3302 * @throws android.content.ActivityNotFoundException 3303 * 3304 * @see #startActivityForResult 3305 */ 3306 @Override 3307 public void startActivity(Intent intent) { 3308 startActivityForResult(intent, -1); 3309 } 3310 3311 /** 3312 * Launch a new activity. You will not receive any information about when 3313 * the activity exits. This implementation overrides the base version, 3314 * providing information about 3315 * the activity performing the launch. Because of this additional 3316 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3317 * required; if not specified, the new activity will be added to the 3318 * task of the caller. 3319 * 3320 * <p>This method throws {@link android.content.ActivityNotFoundException} 3321 * if there was no Activity found to run the given Intent. 3322 * 3323 * @param intents The intents to start. 3324 * 3325 * @throws android.content.ActivityNotFoundException 3326 * 3327 * @see #startActivityForResult 3328 */ 3329 @Override 3330 public void startActivities(Intent[] intents) { 3331 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 3332 mToken, this, intents); 3333 } 3334 3335 /** 3336 * Like {@link #startActivity(Intent)}, but taking a IntentSender 3337 * to start; see 3338 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3339 * for more information. 3340 * 3341 * @param intent The IntentSender to launch. 3342 * @param fillInIntent If non-null, this will be provided as the 3343 * intent parameter to {@link IntentSender#sendIntent}. 3344 * @param flagsMask Intent flags in the original IntentSender that you 3345 * would like to change. 3346 * @param flagsValues Desired values for any bits set in 3347 * <var>flagsMask</var> 3348 * @param extraFlags Always set to 0. 3349 */ 3350 public void startIntentSender(IntentSender intent, 3351 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3352 throws IntentSender.SendIntentException { 3353 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3354 flagsValues, extraFlags); 3355 } 3356 3357 /** 3358 * A special variation to launch an activity only if a new activity 3359 * instance is needed to handle the given Intent. In other words, this is 3360 * just like {@link #startActivityForResult(Intent, int)} except: if you are 3361 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 3362 * singleTask or singleTop 3363 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 3364 * and the activity 3365 * that handles <var>intent</var> is the same as your currently running 3366 * activity, then a new instance is not needed. In this case, instead of 3367 * the normal behavior of calling {@link #onNewIntent} this function will 3368 * return and you can handle the Intent yourself. 3369 * 3370 * <p>This function can only be called from a top-level activity; if it is 3371 * called from a child activity, a runtime exception will be thrown. 3372 * 3373 * @param intent The intent to start. 3374 * @param requestCode If >= 0, this code will be returned in 3375 * onActivityResult() when the activity exits, as described in 3376 * {@link #startActivityForResult}. 3377 * 3378 * @return If a new activity was launched then true is returned; otherwise 3379 * false is returned and you must handle the Intent yourself. 3380 * 3381 * @see #startActivity 3382 * @see #startActivityForResult 3383 */ 3384 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 3385 if (mParent == null) { 3386 int result = IActivityManager.START_RETURN_INTENT_TO_CALLER; 3387 try { 3388 intent.setAllowFds(false); 3389 result = ActivityManagerNative.getDefault() 3390 .startActivity(mMainThread.getApplicationThread(), 3391 intent, intent.resolveTypeIfNeeded( 3392 getContentResolver()), 3393 null, 0, 3394 mToken, mEmbeddedID, requestCode, true, false, 3395 null, null, false); 3396 } catch (RemoteException e) { 3397 // Empty 3398 } 3399 3400 Instrumentation.checkStartActivityResult(result, intent); 3401 3402 if (requestCode >= 0) { 3403 // If this start is requesting a result, we can avoid making 3404 // the activity visible until the result is received. Setting 3405 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3406 // activity hidden during this time, to avoid flickering. 3407 // This can only be done when a result is requested because 3408 // that guarantees we will get information back when the 3409 // activity is finished, no matter what happens to it. 3410 mStartedActivity = true; 3411 } 3412 return result != IActivityManager.START_RETURN_INTENT_TO_CALLER; 3413 } 3414 3415 throw new UnsupportedOperationException( 3416 "startActivityIfNeeded can only be called from a top-level activity"); 3417 } 3418 3419 /** 3420 * Special version of starting an activity, for use when you are replacing 3421 * other activity components. You can use this to hand the Intent off 3422 * to the next Activity that can handle it. You typically call this in 3423 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3424 * 3425 * @param intent The intent to dispatch to the next activity. For 3426 * correct behavior, this must be the same as the Intent that started 3427 * your own activity; the only changes you can make are to the extras 3428 * inside of it. 3429 * 3430 * @return Returns a boolean indicating whether there was another Activity 3431 * to start: true if there was a next activity to start, false if there 3432 * wasn't. In general, if true is returned you will then want to call 3433 * finish() on yourself. 3434 */ 3435 public boolean startNextMatchingActivity(Intent intent) { 3436 if (mParent == null) { 3437 try { 3438 intent.setAllowFds(false); 3439 return ActivityManagerNative.getDefault() 3440 .startNextMatchingActivity(mToken, intent); 3441 } catch (RemoteException e) { 3442 // Empty 3443 } 3444 return false; 3445 } 3446 3447 throw new UnsupportedOperationException( 3448 "startNextMatchingActivity can only be called from a top-level activity"); 3449 } 3450 3451 /** 3452 * This is called when a child activity of this one calls its 3453 * {@link #startActivity} or {@link #startActivityForResult} method. 3454 * 3455 * <p>This method throws {@link android.content.ActivityNotFoundException} 3456 * if there was no Activity found to run the given Intent. 3457 * 3458 * @param child The activity making the call. 3459 * @param intent The intent to start. 3460 * @param requestCode Reply request code. < 0 if reply is not requested. 3461 * 3462 * @throws android.content.ActivityNotFoundException 3463 * 3464 * @see #startActivity 3465 * @see #startActivityForResult 3466 */ 3467 public void startActivityFromChild(Activity child, Intent intent, 3468 int requestCode) { 3469 Instrumentation.ActivityResult ar = 3470 mInstrumentation.execStartActivity( 3471 this, mMainThread.getApplicationThread(), mToken, child, 3472 intent, requestCode); 3473 if (ar != null) { 3474 mMainThread.sendActivityResult( 3475 mToken, child.mEmbeddedID, requestCode, 3476 ar.getResultCode(), ar.getResultData()); 3477 } 3478 } 3479 3480 /** 3481 * This is called when a Fragment in this activity calls its 3482 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 3483 * method. 3484 * 3485 * <p>This method throws {@link android.content.ActivityNotFoundException} 3486 * if there was no Activity found to run the given Intent. 3487 * 3488 * @param fragment The fragment making the call. 3489 * @param intent The intent to start. 3490 * @param requestCode Reply request code. < 0 if reply is not requested. 3491 * 3492 * @throws android.content.ActivityNotFoundException 3493 * 3494 * @see Fragment#startActivity 3495 * @see Fragment#startActivityForResult 3496 */ 3497 public void startActivityFromFragment(Fragment fragment, Intent intent, 3498 int requestCode) { 3499 Instrumentation.ActivityResult ar = 3500 mInstrumentation.execStartActivity( 3501 this, mMainThread.getApplicationThread(), mToken, fragment, 3502 intent, requestCode); 3503 if (ar != null) { 3504 mMainThread.sendActivityResult( 3505 mToken, fragment.mWho, requestCode, 3506 ar.getResultCode(), ar.getResultData()); 3507 } 3508 } 3509 3510 /** 3511 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3512 * taking a IntentSender; see 3513 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3514 * for more information. 3515 */ 3516 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3517 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3518 int extraFlags) 3519 throws IntentSender.SendIntentException { 3520 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3521 flagsMask, flagsValues, child); 3522 } 3523 3524 /** 3525 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3526 * or {@link #finish} to specify an explicit transition animation to 3527 * perform next. 3528 * @param enterAnim A resource ID of the animation resource to use for 3529 * the incoming activity. Use 0 for no animation. 3530 * @param exitAnim A resource ID of the animation resource to use for 3531 * the outgoing activity. Use 0 for no animation. 3532 */ 3533 public void overridePendingTransition(int enterAnim, int exitAnim) { 3534 try { 3535 ActivityManagerNative.getDefault().overridePendingTransition( 3536 mToken, getPackageName(), enterAnim, exitAnim); 3537 } catch (RemoteException e) { 3538 } 3539 } 3540 3541 /** 3542 * Call this to set the result that your activity will return to its 3543 * caller. 3544 * 3545 * @param resultCode The result code to propagate back to the originating 3546 * activity, often RESULT_CANCELED or RESULT_OK 3547 * 3548 * @see #RESULT_CANCELED 3549 * @see #RESULT_OK 3550 * @see #RESULT_FIRST_USER 3551 * @see #setResult(int, Intent) 3552 */ 3553 public final void setResult(int resultCode) { 3554 synchronized (this) { 3555 mResultCode = resultCode; 3556 mResultData = null; 3557 } 3558 } 3559 3560 /** 3561 * Call this to set the result that your activity will return to its 3562 * caller. 3563 * 3564 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 3565 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 3566 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 3567 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 3568 * Activity receiving the result access to the specific URIs in the Intent. 3569 * Access will remain until the Activity has finished (it will remain across the hosting 3570 * process being killed and other temporary destruction) and will be added 3571 * to any existing set of URI permissions it already holds. 3572 * 3573 * @param resultCode The result code to propagate back to the originating 3574 * activity, often RESULT_CANCELED or RESULT_OK 3575 * @param data The data to propagate back to the originating activity. 3576 * 3577 * @see #RESULT_CANCELED 3578 * @see #RESULT_OK 3579 * @see #RESULT_FIRST_USER 3580 * @see #setResult(int) 3581 */ 3582 public final void setResult(int resultCode, Intent data) { 3583 synchronized (this) { 3584 mResultCode = resultCode; 3585 mResultData = data; 3586 } 3587 } 3588 3589 /** 3590 * Return the name of the package that invoked this activity. This is who 3591 * the data in {@link #setResult setResult()} will be sent to. You can 3592 * use this information to validate that the recipient is allowed to 3593 * receive the data. 3594 * 3595 * <p>Note: if the calling activity is not expecting a result (that is it 3596 * did not use the {@link #startActivityForResult} 3597 * form that includes a request code), then the calling package will be 3598 * null. 3599 * 3600 * @return The package of the activity that will receive your 3601 * reply, or null if none. 3602 */ 3603 public String getCallingPackage() { 3604 try { 3605 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 3606 } catch (RemoteException e) { 3607 return null; 3608 } 3609 } 3610 3611 /** 3612 * Return the name of the activity that invoked this activity. This is 3613 * who the data in {@link #setResult setResult()} will be sent to. You 3614 * can use this information to validate that the recipient is allowed to 3615 * receive the data. 3616 * 3617 * <p>Note: if the calling activity is not expecting a result (that is it 3618 * did not use the {@link #startActivityForResult} 3619 * form that includes a request code), then the calling package will be 3620 * null. 3621 * 3622 * @return String The full name of the activity that will receive your 3623 * reply, or null if none. 3624 */ 3625 public ComponentName getCallingActivity() { 3626 try { 3627 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 3628 } catch (RemoteException e) { 3629 return null; 3630 } 3631 } 3632 3633 /** 3634 * Control whether this activity's main window is visible. This is intended 3635 * only for the special case of an activity that is not going to show a 3636 * UI itself, but can't just finish prior to onResume() because it needs 3637 * to wait for a service binding or such. Setting this to false allows 3638 * you to prevent your UI from being shown during that time. 3639 * 3640 * <p>The default value for this is taken from the 3641 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 3642 */ 3643 public void setVisible(boolean visible) { 3644 if (mVisibleFromClient != visible) { 3645 mVisibleFromClient = visible; 3646 if (mVisibleFromServer) { 3647 if (visible) makeVisible(); 3648 else mDecor.setVisibility(View.INVISIBLE); 3649 } 3650 } 3651 } 3652 3653 void makeVisible() { 3654 if (!mWindowAdded) { 3655 ViewManager wm = getWindowManager(); 3656 wm.addView(mDecor, getWindow().getAttributes()); 3657 mWindowAdded = true; 3658 } 3659 mDecor.setVisibility(View.VISIBLE); 3660 } 3661 3662 /** 3663 * Check to see whether this activity is in the process of finishing, 3664 * either because you called {@link #finish} on it or someone else 3665 * has requested that it finished. This is often used in 3666 * {@link #onPause} to determine whether the activity is simply pausing or 3667 * completely finishing. 3668 * 3669 * @return If the activity is finishing, returns true; else returns false. 3670 * 3671 * @see #finish 3672 */ 3673 public boolean isFinishing() { 3674 return mFinished; 3675 } 3676 3677 /** 3678 * Check to see whether this activity is in the process of being destroyed in order to be 3679 * recreated with a new configuration. This is often used in 3680 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 3681 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 3682 * 3683 * @return If the activity is being torn down in order to be recreated with a new configuration, 3684 * returns true; else returns false. 3685 */ 3686 public boolean isChangingConfigurations() { 3687 return mChangingConfigurations; 3688 } 3689 3690 /** 3691 * Cause this Activity to be recreated with a new instance. This results 3692 * in essentially the same flow as when the Activity is created due to 3693 * a configuration change -- the current instance will go through its 3694 * lifecycle to {@link #onDestroy} and a new instance then created after it. 3695 */ 3696 public void recreate() { 3697 if (mParent != null) { 3698 throw new IllegalStateException("Can only be called on top-level activity"); 3699 } 3700 if (Looper.myLooper() != mMainThread.getLooper()) { 3701 throw new IllegalStateException("Must be called from main thread"); 3702 } 3703 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, false); 3704 } 3705 3706 /** 3707 * Call this when your activity is done and should be closed. The 3708 * ActivityResult is propagated back to whoever launched you via 3709 * onActivityResult(). 3710 */ 3711 public void finish() { 3712 if (mParent == null) { 3713 int resultCode; 3714 Intent resultData; 3715 synchronized (this) { 3716 resultCode = mResultCode; 3717 resultData = mResultData; 3718 } 3719 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 3720 try { 3721 if (resultData != null) { 3722 resultData.setAllowFds(false); 3723 } 3724 if (ActivityManagerNative.getDefault() 3725 .finishActivity(mToken, resultCode, resultData)) { 3726 mFinished = true; 3727 } 3728 } catch (RemoteException e) { 3729 // Empty 3730 } 3731 } else { 3732 mParent.finishFromChild(this); 3733 } 3734 } 3735 3736 /** 3737 * This is called when a child activity of this one calls its 3738 * {@link #finish} method. The default implementation simply calls 3739 * finish() on this activity (the parent), finishing the entire group. 3740 * 3741 * @param child The activity making the call. 3742 * 3743 * @see #finish 3744 */ 3745 public void finishFromChild(Activity child) { 3746 finish(); 3747 } 3748 3749 /** 3750 * Force finish another activity that you had previously started with 3751 * {@link #startActivityForResult}. 3752 * 3753 * @param requestCode The request code of the activity that you had 3754 * given to startActivityForResult(). If there are multiple 3755 * activities started with this request code, they 3756 * will all be finished. 3757 */ 3758 public void finishActivity(int requestCode) { 3759 if (mParent == null) { 3760 try { 3761 ActivityManagerNative.getDefault() 3762 .finishSubActivity(mToken, mEmbeddedID, requestCode); 3763 } catch (RemoteException e) { 3764 // Empty 3765 } 3766 } else { 3767 mParent.finishActivityFromChild(this, requestCode); 3768 } 3769 } 3770 3771 /** 3772 * This is called when a child activity of this one calls its 3773 * finishActivity(). 3774 * 3775 * @param child The activity making the call. 3776 * @param requestCode Request code that had been used to start the 3777 * activity. 3778 */ 3779 public void finishActivityFromChild(Activity child, int requestCode) { 3780 try { 3781 ActivityManagerNative.getDefault() 3782 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 3783 } catch (RemoteException e) { 3784 // Empty 3785 } 3786 } 3787 3788 /** 3789 * Called when an activity you launched exits, giving you the requestCode 3790 * you started it with, the resultCode it returned, and any additional 3791 * data from it. The <var>resultCode</var> will be 3792 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 3793 * didn't return any result, or crashed during its operation. 3794 * 3795 * <p>You will receive this call immediately before onResume() when your 3796 * activity is re-starting. 3797 * 3798 * @param requestCode The integer request code originally supplied to 3799 * startActivityForResult(), allowing you to identify who this 3800 * result came from. 3801 * @param resultCode The integer result code returned by the child activity 3802 * through its setResult(). 3803 * @param data An Intent, which can return result data to the caller 3804 * (various data can be attached to Intent "extras"). 3805 * 3806 * @see #startActivityForResult 3807 * @see #createPendingResult 3808 * @see #setResult(int) 3809 */ 3810 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 3811 } 3812 3813 /** 3814 * Create a new PendingIntent object which you can hand to others 3815 * for them to use to send result data back to your 3816 * {@link #onActivityResult} callback. The created object will be either 3817 * one-shot (becoming invalid after a result is sent back) or multiple 3818 * (allowing any number of results to be sent through it). 3819 * 3820 * @param requestCode Private request code for the sender that will be 3821 * associated with the result data when it is returned. The sender can not 3822 * modify this value, allowing you to identify incoming results. 3823 * @param data Default data to supply in the result, which may be modified 3824 * by the sender. 3825 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 3826 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 3827 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 3828 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 3829 * or any of the flags as supported by 3830 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 3831 * of the intent that can be supplied when the actual send happens. 3832 * 3833 * @return Returns an existing or new PendingIntent matching the given 3834 * parameters. May return null only if 3835 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 3836 * supplied. 3837 * 3838 * @see PendingIntent 3839 */ 3840 public PendingIntent createPendingResult(int requestCode, Intent data, 3841 int flags) { 3842 String packageName = getPackageName(); 3843 try { 3844 data.setAllowFds(false); 3845 IIntentSender target = 3846 ActivityManagerNative.getDefault().getIntentSender( 3847 IActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 3848 mParent == null ? mToken : mParent.mToken, 3849 mEmbeddedID, requestCode, new Intent[] { data }, null, flags); 3850 return target != null ? new PendingIntent(target) : null; 3851 } catch (RemoteException e) { 3852 // Empty 3853 } 3854 return null; 3855 } 3856 3857 /** 3858 * Change the desired orientation of this activity. If the activity 3859 * is currently in the foreground or otherwise impacting the screen 3860 * orientation, the screen will immediately be changed (possibly causing 3861 * the activity to be restarted). Otherwise, this will be used the next 3862 * time the activity is visible. 3863 * 3864 * @param requestedOrientation An orientation constant as used in 3865 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3866 */ 3867 public void setRequestedOrientation(int requestedOrientation) { 3868 if (mParent == null) { 3869 try { 3870 ActivityManagerNative.getDefault().setRequestedOrientation( 3871 mToken, requestedOrientation); 3872 } catch (RemoteException e) { 3873 // Empty 3874 } 3875 } else { 3876 mParent.setRequestedOrientation(requestedOrientation); 3877 } 3878 } 3879 3880 /** 3881 * Return the current requested orientation of the activity. This will 3882 * either be the orientation requested in its component's manifest, or 3883 * the last requested orientation given to 3884 * {@link #setRequestedOrientation(int)}. 3885 * 3886 * @return Returns an orientation constant as used in 3887 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3888 */ 3889 public int getRequestedOrientation() { 3890 if (mParent == null) { 3891 try { 3892 return ActivityManagerNative.getDefault() 3893 .getRequestedOrientation(mToken); 3894 } catch (RemoteException e) { 3895 // Empty 3896 } 3897 } else { 3898 return mParent.getRequestedOrientation(); 3899 } 3900 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 3901 } 3902 3903 /** 3904 * Return the identifier of the task this activity is in. This identifier 3905 * will remain the same for the lifetime of the activity. 3906 * 3907 * @return Task identifier, an opaque integer. 3908 */ 3909 public int getTaskId() { 3910 try { 3911 return ActivityManagerNative.getDefault() 3912 .getTaskForActivity(mToken, false); 3913 } catch (RemoteException e) { 3914 return -1; 3915 } 3916 } 3917 3918 /** 3919 * Return whether this activity is the root of a task. The root is the 3920 * first activity in a task. 3921 * 3922 * @return True if this is the root activity, else false. 3923 */ 3924 public boolean isTaskRoot() { 3925 try { 3926 return ActivityManagerNative.getDefault() 3927 .getTaskForActivity(mToken, true) >= 0; 3928 } catch (RemoteException e) { 3929 return false; 3930 } 3931 } 3932 3933 /** 3934 * Move the task containing this activity to the back of the activity 3935 * stack. The activity's order within the task is unchanged. 3936 * 3937 * @param nonRoot If false then this only works if the activity is the root 3938 * of a task; if true it will work for any activity in 3939 * a task. 3940 * 3941 * @return If the task was moved (or it was already at the 3942 * back) true is returned, else false. 3943 */ 3944 public boolean moveTaskToBack(boolean nonRoot) { 3945 try { 3946 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 3947 mToken, nonRoot); 3948 } catch (RemoteException e) { 3949 // Empty 3950 } 3951 return false; 3952 } 3953 3954 /** 3955 * Returns class name for this activity with the package prefix removed. 3956 * This is the default name used to read and write settings. 3957 * 3958 * @return The local class name. 3959 */ 3960 public String getLocalClassName() { 3961 final String pkg = getPackageName(); 3962 final String cls = mComponent.getClassName(); 3963 int packageLen = pkg.length(); 3964 if (!cls.startsWith(pkg) || cls.length() <= packageLen 3965 || cls.charAt(packageLen) != '.') { 3966 return cls; 3967 } 3968 return cls.substring(packageLen+1); 3969 } 3970 3971 /** 3972 * Returns complete component name of this activity. 3973 * 3974 * @return Returns the complete component name for this activity 3975 */ 3976 public ComponentName getComponentName() 3977 { 3978 return mComponent; 3979 } 3980 3981 /** 3982 * Retrieve a {@link SharedPreferences} object for accessing preferences 3983 * that are private to this activity. This simply calls the underlying 3984 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 3985 * class name as the preferences name. 3986 * 3987 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 3988 * operation, {@link #MODE_WORLD_READABLE} and 3989 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 3990 * 3991 * @return Returns the single SharedPreferences instance that can be used 3992 * to retrieve and modify the preference values. 3993 */ 3994 public SharedPreferences getPreferences(int mode) { 3995 return getSharedPreferences(getLocalClassName(), mode); 3996 } 3997 3998 private void ensureSearchManager() { 3999 if (mSearchManager != null) { 4000 return; 4001 } 4002 4003 mSearchManager = new SearchManager(this, null); 4004 } 4005 4006 @Override 4007 public Object getSystemService(String name) { 4008 if (getBaseContext() == null) { 4009 throw new IllegalStateException( 4010 "System services not available to Activities before onCreate()"); 4011 } 4012 4013 if (WINDOW_SERVICE.equals(name)) { 4014 return mWindowManager; 4015 } else if (SEARCH_SERVICE.equals(name)) { 4016 ensureSearchManager(); 4017 return mSearchManager; 4018 } 4019 return super.getSystemService(name); 4020 } 4021 4022 /** 4023 * Change the title associated with this activity. If this is a 4024 * top-level activity, the title for its window will change. If it 4025 * is an embedded activity, the parent can do whatever it wants 4026 * with it. 4027 */ 4028 public void setTitle(CharSequence title) { 4029 mTitle = title; 4030 onTitleChanged(title, mTitleColor); 4031 4032 if (mParent != null) { 4033 mParent.onChildTitleChanged(this, title); 4034 } 4035 } 4036 4037 /** 4038 * Change the title associated with this activity. If this is a 4039 * top-level activity, the title for its window will change. If it 4040 * is an embedded activity, the parent can do whatever it wants 4041 * with it. 4042 */ 4043 public void setTitle(int titleId) { 4044 setTitle(getText(titleId)); 4045 } 4046 4047 public void setTitleColor(int textColor) { 4048 mTitleColor = textColor; 4049 onTitleChanged(mTitle, textColor); 4050 } 4051 4052 public final CharSequence getTitle() { 4053 return mTitle; 4054 } 4055 4056 public final int getTitleColor() { 4057 return mTitleColor; 4058 } 4059 4060 protected void onTitleChanged(CharSequence title, int color) { 4061 if (mTitleReady) { 4062 final Window win = getWindow(); 4063 if (win != null) { 4064 win.setTitle(title); 4065 if (color != 0) { 4066 win.setTitleColor(color); 4067 } 4068 } 4069 } 4070 } 4071 4072 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 4073 } 4074 4075 /** 4076 * Sets the visibility of the progress bar in the title. 4077 * <p> 4078 * In order for the progress bar to be shown, the feature must be requested 4079 * via {@link #requestWindowFeature(int)}. 4080 * 4081 * @param visible Whether to show the progress bars in the title. 4082 */ 4083 public final void setProgressBarVisibility(boolean visible) { 4084 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 4085 Window.PROGRESS_VISIBILITY_OFF); 4086 } 4087 4088 /** 4089 * Sets the visibility of the indeterminate progress bar in the title. 4090 * <p> 4091 * In order for the progress bar to be shown, the feature must be requested 4092 * via {@link #requestWindowFeature(int)}. 4093 * 4094 * @param visible Whether to show the progress bars in the title. 4095 */ 4096 public final void setProgressBarIndeterminateVisibility(boolean visible) { 4097 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 4098 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 4099 } 4100 4101 /** 4102 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 4103 * is always indeterminate). 4104 * <p> 4105 * In order for the progress bar to be shown, the feature must be requested 4106 * via {@link #requestWindowFeature(int)}. 4107 * 4108 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 4109 */ 4110 public final void setProgressBarIndeterminate(boolean indeterminate) { 4111 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4112 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 4113 } 4114 4115 /** 4116 * Sets the progress for the progress bars in the title. 4117 * <p> 4118 * In order for the progress bar to be shown, the feature must be requested 4119 * via {@link #requestWindowFeature(int)}. 4120 * 4121 * @param progress The progress for the progress bar. Valid ranges are from 4122 * 0 to 10000 (both inclusive). If 10000 is given, the progress 4123 * bar will be completely filled and will fade out. 4124 */ 4125 public final void setProgress(int progress) { 4126 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 4127 } 4128 4129 /** 4130 * Sets the secondary progress for the progress bar in the title. This 4131 * progress is drawn between the primary progress (set via 4132 * {@link #setProgress(int)} and the background. It can be ideal for media 4133 * scenarios such as showing the buffering progress while the default 4134 * progress shows the play progress. 4135 * <p> 4136 * In order for the progress bar to be shown, the feature must be requested 4137 * via {@link #requestWindowFeature(int)}. 4138 * 4139 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 4140 * 0 to 10000 (both inclusive). 4141 */ 4142 public final void setSecondaryProgress(int secondaryProgress) { 4143 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4144 secondaryProgress + Window.PROGRESS_SECONDARY_START); 4145 } 4146 4147 /** 4148 * Suggests an audio stream whose volume should be changed by the hardware 4149 * volume controls. 4150 * <p> 4151 * The suggested audio stream will be tied to the window of this Activity. 4152 * If the Activity is switched, the stream set here is no longer the 4153 * suggested stream. The client does not need to save and restore the old 4154 * suggested stream value in onPause and onResume. 4155 * 4156 * @param streamType The type of the audio stream whose volume should be 4157 * changed by the hardware volume controls. It is not guaranteed that 4158 * the hardware volume controls will always change this stream's 4159 * volume (for example, if a call is in progress, its stream's volume 4160 * may be changed instead). To reset back to the default, use 4161 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 4162 */ 4163 public final void setVolumeControlStream(int streamType) { 4164 getWindow().setVolumeControlStream(streamType); 4165 } 4166 4167 /** 4168 * Gets the suggested audio stream whose volume should be changed by the 4169 * harwdare volume controls. 4170 * 4171 * @return The suggested audio stream type whose volume should be changed by 4172 * the hardware volume controls. 4173 * @see #setVolumeControlStream(int) 4174 */ 4175 public final int getVolumeControlStream() { 4176 return getWindow().getVolumeControlStream(); 4177 } 4178 4179 /** 4180 * Runs the specified action on the UI thread. If the current thread is the UI 4181 * thread, then the action is executed immediately. If the current thread is 4182 * not the UI thread, the action is posted to the event queue of the UI thread. 4183 * 4184 * @param action the action to run on the UI thread 4185 */ 4186 public final void runOnUiThread(Runnable action) { 4187 if (Thread.currentThread() != mUiThread) { 4188 mHandler.post(action); 4189 } else { 4190 action.run(); 4191 } 4192 } 4193 4194 /** 4195 * Standard implementation of 4196 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 4197 * inflating with the LayoutInflater returned by {@link #getSystemService}. 4198 * This implementation does nothing and is for 4199 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 4200 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 4201 * 4202 * @see android.view.LayoutInflater#createView 4203 * @see android.view.Window#getLayoutInflater 4204 */ 4205 public View onCreateView(String name, Context context, AttributeSet attrs) { 4206 return null; 4207 } 4208 4209 /** 4210 * Standard implementation of 4211 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 4212 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 4213 * This implementation handles <fragment> tags to embed fragments inside 4214 * of the activity. 4215 * 4216 * @see android.view.LayoutInflater#createView 4217 * @see android.view.Window#getLayoutInflater 4218 */ 4219 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 4220 if (!"fragment".equals(name)) { 4221 return onCreateView(name, context, attrs); 4222 } 4223 4224 String fname = attrs.getAttributeValue(null, "class"); 4225 TypedArray a = 4226 context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Fragment); 4227 if (fname == null) { 4228 fname = a.getString(com.android.internal.R.styleable.Fragment_name); 4229 } 4230 int id = a.getResourceId(com.android.internal.R.styleable.Fragment_id, View.NO_ID); 4231 String tag = a.getString(com.android.internal.R.styleable.Fragment_tag); 4232 a.recycle(); 4233 4234 int containerId = parent != null ? parent.getId() : 0; 4235 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 4236 throw new IllegalArgumentException(attrs.getPositionDescription() 4237 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 4238 } 4239 4240 // If we restored from a previous state, we may already have 4241 // instantiated this fragment from the state and should use 4242 // that instance instead of making a new one. 4243 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 4244 if (fragment == null && tag != null) { 4245 fragment = mFragments.findFragmentByTag(tag); 4246 } 4247 if (fragment == null && containerId != View.NO_ID) { 4248 fragment = mFragments.findFragmentById(containerId); 4249 } 4250 4251 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 4252 + Integer.toHexString(id) + " fname=" + fname 4253 + " existing=" + fragment); 4254 if (fragment == null) { 4255 fragment = Fragment.instantiate(this, fname); 4256 fragment.mFromLayout = true; 4257 fragment.mFragmentId = id != 0 ? id : containerId; 4258 fragment.mContainerId = containerId; 4259 fragment.mTag = tag; 4260 fragment.mInLayout = true; 4261 fragment.mFragmentManager = mFragments; 4262 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4263 mFragments.addFragment(fragment, true); 4264 4265 } else if (fragment.mInLayout) { 4266 // A fragment already exists and it is not one we restored from 4267 // previous state. 4268 throw new IllegalArgumentException(attrs.getPositionDescription() 4269 + ": Duplicate id 0x" + Integer.toHexString(id) 4270 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 4271 + " with another fragment for " + fname); 4272 } else { 4273 // This fragment was retained from a previous instance; get it 4274 // going now. 4275 fragment.mInLayout = true; 4276 // If this fragment is newly instantiated (either right now, or 4277 // from last saved state), then give it the attributes to 4278 // initialize itself. 4279 if (!fragment.mRetaining) { 4280 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4281 } 4282 mFragments.moveToState(fragment); 4283 } 4284 4285 if (fragment.mView == null) { 4286 throw new IllegalStateException("Fragment " + fname 4287 + " did not create a view."); 4288 } 4289 if (id != 0) { 4290 fragment.mView.setId(id); 4291 } 4292 if (fragment.mView.getTag() == null) { 4293 fragment.mView.setTag(tag); 4294 } 4295 return fragment.mView; 4296 } 4297 4298 /** 4299 * Print the Activity's state into the given stream. This gets invoked if 4300 * you run "adb shell dumpsys activity <activity_component_name>". 4301 * 4302 * @param prefix Desired prefix to prepend at each line of output. 4303 * @param fd The raw file descriptor that the dump is being sent to. 4304 * @param writer The PrintWriter to which you should dump your state. This will be 4305 * closed for you after you return. 4306 * @param args additional arguments to the dump request. 4307 */ 4308 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4309 writer.print(prefix); writer.print("Local Activity "); 4310 writer.print(Integer.toHexString(System.identityHashCode(this))); 4311 writer.println(" State:"); 4312 String innerPrefix = prefix + " "; 4313 writer.print(innerPrefix); writer.print("mResumed="); 4314 writer.print(mResumed); writer.print(" mStopped="); 4315 writer.print(mStopped); writer.print(" mFinished="); 4316 writer.println(mFinished); 4317 writer.print(innerPrefix); writer.print("mLoadersStarted="); 4318 writer.println(mLoadersStarted); 4319 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 4320 writer.println(mChangingConfigurations); 4321 writer.print(innerPrefix); writer.print("mCurrentConfig="); 4322 writer.println(mCurrentConfig); 4323 if (mLoaderManager != null) { 4324 writer.print(prefix); writer.print("Loader Manager "); 4325 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 4326 writer.println(":"); 4327 mLoaderManager.dump(prefix + " ", fd, writer, args); 4328 } 4329 mFragments.dump(prefix, fd, writer, args); 4330 } 4331 4332 /** 4333 * Bit indicating that this activity is "immersive" and should not be 4334 * interrupted by notifications if possible. 4335 * 4336 * This value is initially set by the manifest property 4337 * <code>android:immersive</code> but may be changed at runtime by 4338 * {@link #setImmersive}. 4339 * 4340 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4341 * @hide 4342 */ 4343 public boolean isImmersive() { 4344 try { 4345 return ActivityManagerNative.getDefault().isImmersive(mToken); 4346 } catch (RemoteException e) { 4347 return false; 4348 } 4349 } 4350 4351 /** 4352 * Adjust the current immersive mode setting. 4353 * 4354 * Note that changing this value will have no effect on the activity's 4355 * {@link android.content.pm.ActivityInfo} structure; that is, if 4356 * <code>android:immersive</code> is set to <code>true</code> 4357 * in the application's manifest entry for this activity, the {@link 4358 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 4359 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4360 * FLAG_IMMERSIVE} bit set. 4361 * 4362 * @see #isImmersive 4363 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4364 * @hide 4365 */ 4366 public void setImmersive(boolean i) { 4367 try { 4368 ActivityManagerNative.getDefault().setImmersive(mToken, i); 4369 } catch (RemoteException e) { 4370 // pass 4371 } 4372 } 4373 4374 /** 4375 * Start an action mode. 4376 * 4377 * @param callback Callback that will manage lifecycle events for this context mode 4378 * @return The ContextMode that was started, or null if it was canceled 4379 * 4380 * @see ActionMode 4381 */ 4382 public ActionMode startActionMode(ActionMode.Callback callback) { 4383 return mWindow.getDecorView().startActionMode(callback); 4384 } 4385 4386 /** 4387 * Give the Activity a chance to control the UI for an action mode requested 4388 * by the system. 4389 * 4390 * <p>Note: If you are looking for a notification callback that an action mode 4391 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 4392 * 4393 * @param callback The callback that should control the new action mode 4394 * @return The new action mode, or <code>null</code> if the activity does not want to 4395 * provide special handling for this action mode. (It will be handled by the system.) 4396 */ 4397 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 4398 initActionBar(); 4399 if (mActionBar != null) { 4400 return mActionBar.startActionMode(callback); 4401 } 4402 return null; 4403 } 4404 4405 /** 4406 * Notifies the Activity that an action mode has been started. 4407 * Activity subclasses overriding this method should call the superclass implementation. 4408 * 4409 * @param mode The new action mode. 4410 */ 4411 public void onActionModeStarted(ActionMode mode) { 4412 } 4413 4414 /** 4415 * Notifies the activity that an action mode has finished. 4416 * Activity subclasses overriding this method should call the superclass implementation. 4417 * 4418 * @param mode The action mode that just finished. 4419 */ 4420 public void onActionModeFinished(ActionMode mode) { 4421 } 4422 4423 // ------------------ Internal API ------------------ 4424 4425 final void setParent(Activity parent) { 4426 mParent = parent; 4427 } 4428 4429 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 4430 Application application, Intent intent, ActivityInfo info, CharSequence title, 4431 Activity parent, String id, NonConfigurationInstances lastNonConfigurationInstances, 4432 Configuration config) { 4433 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 4434 lastNonConfigurationInstances, config); 4435 } 4436 4437 final void attach(Context context, ActivityThread aThread, 4438 Instrumentation instr, IBinder token, int ident, 4439 Application application, Intent intent, ActivityInfo info, 4440 CharSequence title, Activity parent, String id, 4441 NonConfigurationInstances lastNonConfigurationInstances, 4442 Configuration config) { 4443 attachBaseContext(context); 4444 4445 mFragments.attachActivity(this); 4446 4447 mWindow = PolicyManager.makeNewWindow(this); 4448 mWindow.setCallback(this); 4449 mWindow.getLayoutInflater().setPrivateFactory(this); 4450 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 4451 mWindow.setSoftInputMode(info.softInputMode); 4452 } 4453 if (info.uiOptions != 0) { 4454 mWindow.setUiOptions(info.uiOptions); 4455 } 4456 mUiThread = Thread.currentThread(); 4457 4458 mMainThread = aThread; 4459 mInstrumentation = instr; 4460 mToken = token; 4461 mIdent = ident; 4462 mApplication = application; 4463 mIntent = intent; 4464 mComponent = intent.getComponent(); 4465 mActivityInfo = info; 4466 mTitle = title; 4467 mParent = parent; 4468 mEmbeddedID = id; 4469 mLastNonConfigurationInstances = lastNonConfigurationInstances; 4470 4471 mWindow.setWindowManager(null, mToken, mComponent.flattenToString(), 4472 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 4473 if (mParent != null) { 4474 mWindow.setContainer(mParent.getWindow()); 4475 } 4476 mWindowManager = mWindow.getWindowManager(); 4477 mCurrentConfig = config; 4478 } 4479 4480 final IBinder getActivityToken() { 4481 return mParent != null ? mParent.getActivityToken() : mToken; 4482 } 4483 4484 final void performCreate(Bundle icicle) { 4485 onCreate(icicle); 4486 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 4487 com.android.internal.R.styleable.Window_windowNoDisplay, false); 4488 mFragments.dispatchActivityCreated(); 4489 } 4490 4491 final void performStart() { 4492 mFragments.noteStateNotSaved(); 4493 mCalled = false; 4494 mFragments.execPendingActions(); 4495 mInstrumentation.callActivityOnStart(this); 4496 if (!mCalled) { 4497 throw new SuperNotCalledException( 4498 "Activity " + mComponent.toShortString() + 4499 " did not call through to super.onStart()"); 4500 } 4501 mFragments.dispatchStart(); 4502 if (mAllLoaderManagers != null) { 4503 for (int i=mAllLoaderManagers.size()-1; i>=0; i--) { 4504 LoaderManagerImpl lm = mAllLoaderManagers.valueAt(i); 4505 lm.finishRetain(); 4506 lm.doReportStart(); 4507 } 4508 } 4509 } 4510 4511 final void performRestart() { 4512 mFragments.noteStateNotSaved(); 4513 4514 if (mStopped) { 4515 mStopped = false; 4516 if (mToken != null && mParent == null) { 4517 WindowManagerImpl.getDefault().setStoppedState(mToken, false); 4518 } 4519 4520 synchronized (mManagedCursors) { 4521 final int N = mManagedCursors.size(); 4522 for (int i=0; i<N; i++) { 4523 ManagedCursor mc = mManagedCursors.get(i); 4524 if (mc.mReleased || mc.mUpdated) { 4525 if (!mc.mCursor.requery()) { 4526 if (getApplicationInfo().targetSdkVersion 4527 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 4528 throw new IllegalStateException( 4529 "trying to requery an already closed cursor " 4530 + mc.mCursor); 4531 } 4532 } 4533 mc.mReleased = false; 4534 mc.mUpdated = false; 4535 } 4536 } 4537 } 4538 4539 mCalled = false; 4540 mInstrumentation.callActivityOnRestart(this); 4541 if (!mCalled) { 4542 throw new SuperNotCalledException( 4543 "Activity " + mComponent.toShortString() + 4544 " did not call through to super.onRestart()"); 4545 } 4546 performStart(); 4547 } 4548 } 4549 4550 final void performResume() { 4551 performRestart(); 4552 4553 mFragments.execPendingActions(); 4554 4555 mLastNonConfigurationInstances = null; 4556 4557 mCalled = false; 4558 // mResumed is set by the instrumentation 4559 mInstrumentation.callActivityOnResume(this); 4560 if (!mCalled) { 4561 throw new SuperNotCalledException( 4562 "Activity " + mComponent.toShortString() + 4563 " did not call through to super.onResume()"); 4564 } 4565 4566 // Now really resume, and install the current status bar and menu. 4567 mCalled = false; 4568 4569 mFragments.dispatchResume(); 4570 mFragments.execPendingActions(); 4571 4572 onPostResume(); 4573 if (!mCalled) { 4574 throw new SuperNotCalledException( 4575 "Activity " + mComponent.toShortString() + 4576 " did not call through to super.onPostResume()"); 4577 } 4578 } 4579 4580 final void performPause() { 4581 mFragments.dispatchPause(); 4582 mCalled = false; 4583 onPause(); 4584 mResumed = false; 4585 if (!mCalled && getApplicationInfo().targetSdkVersion 4586 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 4587 throw new SuperNotCalledException( 4588 "Activity " + mComponent.toShortString() + 4589 " did not call through to super.onPause()"); 4590 } 4591 mResumed = false; 4592 } 4593 4594 final void performUserLeaving() { 4595 onUserInteraction(); 4596 onUserLeaveHint(); 4597 } 4598 4599 final void performStop() { 4600 if (mLoadersStarted) { 4601 mLoadersStarted = false; 4602 if (mLoaderManager != null) { 4603 if (!mChangingConfigurations) { 4604 mLoaderManager.doStop(); 4605 } else { 4606 mLoaderManager.doRetain(); 4607 } 4608 } 4609 } 4610 4611 if (!mStopped) { 4612 if (mWindow != null) { 4613 mWindow.closeAllPanels(); 4614 } 4615 4616 if (mToken != null && mParent == null) { 4617 WindowManagerImpl.getDefault().setStoppedState(mToken, true); 4618 } 4619 4620 mFragments.dispatchStop(); 4621 4622 mCalled = false; 4623 mInstrumentation.callActivityOnStop(this); 4624 if (!mCalled) { 4625 throw new SuperNotCalledException( 4626 "Activity " + mComponent.toShortString() + 4627 " did not call through to super.onStop()"); 4628 } 4629 4630 synchronized (mManagedCursors) { 4631 final int N = mManagedCursors.size(); 4632 for (int i=0; i<N; i++) { 4633 ManagedCursor mc = mManagedCursors.get(i); 4634 if (!mc.mReleased) { 4635 mc.mCursor.deactivate(); 4636 mc.mReleased = true; 4637 } 4638 } 4639 } 4640 4641 mStopped = true; 4642 } 4643 mResumed = false; 4644 } 4645 4646 final void performDestroy() { 4647 mWindow.destroy(); 4648 mFragments.dispatchDestroy(); 4649 onDestroy(); 4650 if (mLoaderManager != null) { 4651 mLoaderManager.doDestroy(); 4652 } 4653 } 4654 4655 /** 4656 * @hide 4657 */ 4658 public final boolean isResumed() { 4659 return mResumed; 4660 } 4661 4662 void dispatchActivityResult(String who, int requestCode, 4663 int resultCode, Intent data) { 4664 if (false) Log.v( 4665 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 4666 + ", resCode=" + resultCode + ", data=" + data); 4667 mFragments.noteStateNotSaved(); 4668 if (who == null) { 4669 onActivityResult(requestCode, resultCode, data); 4670 } else { 4671 Fragment frag = mFragments.findFragmentByWho(who); 4672 if (frag != null) { 4673 frag.onActivityResult(requestCode, resultCode, data); 4674 } 4675 } 4676 } 4677} 4678