Activity.java revision 1487466dc2ce14cccf0ff2bd2f824238aaa0044e
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.app; 18 19import android.util.ArrayMap; 20import android.util.SuperNotCalledException; 21import com.android.internal.app.ActionBarImpl; 22import com.android.internal.policy.PolicyManager; 23 24import android.content.ComponentCallbacks2; 25import android.content.ComponentName; 26import android.content.ContentResolver; 27import android.content.Context; 28import android.content.CursorLoader; 29import android.content.IIntentSender; 30import android.content.Intent; 31import android.content.IntentSender; 32import android.content.SharedPreferences; 33import android.content.pm.ActivityInfo; 34import android.content.pm.PackageManager; 35import android.content.pm.PackageManager.NameNotFoundException; 36import android.content.res.Configuration; 37import android.content.res.Resources; 38import android.content.res.TypedArray; 39import android.database.Cursor; 40import android.graphics.Bitmap; 41import android.graphics.Canvas; 42import android.graphics.drawable.Drawable; 43import android.media.AudioManager; 44import android.net.Uri; 45import android.os.Build; 46import android.os.Bundle; 47import android.os.Handler; 48import android.os.IBinder; 49import android.os.Looper; 50import android.os.Parcelable; 51import android.os.RemoteException; 52import android.os.StrictMode; 53import android.os.UserHandle; 54import android.text.Selection; 55import android.text.SpannableStringBuilder; 56import android.text.TextUtils; 57import android.text.method.TextKeyListener; 58import android.util.AttributeSet; 59import android.util.EventLog; 60import android.util.Log; 61import android.util.Slog; 62import android.util.SparseArray; 63import android.view.ActionMode; 64import android.view.ContextMenu; 65import android.view.ContextMenu.ContextMenuInfo; 66import android.view.ContextThemeWrapper; 67import android.view.KeyEvent; 68import android.view.LayoutInflater; 69import android.view.Menu; 70import android.view.MenuInflater; 71import android.view.MenuItem; 72import android.view.MotionEvent; 73import android.view.View; 74import android.view.View.OnCreateContextMenuListener; 75import android.view.ViewGroup; 76import android.view.ViewGroup.LayoutParams; 77import android.view.ViewManager; 78import android.view.Window; 79import android.view.WindowManager; 80import android.view.WindowManagerGlobal; 81import android.view.accessibility.AccessibilityEvent; 82import android.widget.AdapterView; 83 84import java.io.FileDescriptor; 85import java.io.PrintWriter; 86import java.util.ArrayList; 87import java.util.HashMap; 88 89/** 90 * An activity is a single, focused thing that the user can do. Almost all 91 * activities interact with the user, so the Activity class takes care of 92 * creating a window for you in which you can place your UI with 93 * {@link #setContentView}. While activities are often presented to the user 94 * as full-screen windows, they can also be used in other ways: as floating 95 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 96 * or embedded inside of another activity (using {@link ActivityGroup}). 97 * 98 * There are two methods almost all subclasses of Activity will implement: 99 * 100 * <ul> 101 * <li> {@link #onCreate} is where you initialize your activity. Most 102 * importantly, here you will usually call {@link #setContentView(int)} 103 * with a layout resource defining your UI, and using {@link #findViewById} 104 * to retrieve the widgets in that UI that you need to interact with 105 * programmatically. 106 * 107 * <li> {@link #onPause} is where you deal with the user leaving your 108 * activity. Most importantly, any changes made by the user should at this 109 * point be committed (usually to the 110 * {@link android.content.ContentProvider} holding the data). 111 * </ul> 112 * 113 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 114 * activity classes must have a corresponding 115 * {@link android.R.styleable#AndroidManifestActivity <activity>} 116 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 117 * 118 * <p>Topics covered here: 119 * <ol> 120 * <li><a href="#Fragments">Fragments</a> 121 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 122 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 123 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 124 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 125 * <li><a href="#Permissions">Permissions</a> 126 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 127 * </ol> 128 * 129 * <div class="special reference"> 130 * <h3>Developer Guides</h3> 131 * <p>The Activity class is an important part of an application's overall lifecycle, 132 * and the way activities are launched and put together is a fundamental 133 * part of the platform's application model. For a detailed perspective on the structure of an 134 * Android application and how activities behave, please read the 135 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 136 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 137 * developer guides.</p> 138 * 139 * <p>You can also find a detailed discussion about how to create activities in the 140 * <a href="{@docRoot}guide/topics/fundamentals/activities.html">Activities</a> 141 * developer guide.</p> 142 * </div> 143 * 144 * <a name="Fragments"></a> 145 * <h3>Fragments</h3> 146 * 147 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 148 * implementations can make use of the {@link Fragment} class to better 149 * modularize their code, build more sophisticated user interfaces for larger 150 * screens, and help scale their application between small and large screens. 151 * 152 * <a name="ActivityLifecycle"></a> 153 * <h3>Activity Lifecycle</h3> 154 * 155 * <p>Activities in the system are managed as an <em>activity stack</em>. 156 * When a new activity is started, it is placed on the top of the stack 157 * and becomes the running activity -- the previous activity always remains 158 * below it in the stack, and will not come to the foreground again until 159 * the new activity exits.</p> 160 * 161 * <p>An activity has essentially four states:</p> 162 * <ul> 163 * <li> If an activity in the foreground of the screen (at the top of 164 * the stack), 165 * it is <em>active</em> or <em>running</em>. </li> 166 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 167 * or transparent activity has focus on top of your activity), it 168 * is <em>paused</em>. A paused activity is completely alive (it 169 * maintains all state and member information and remains attached to 170 * the window manager), but can be killed by the system in extreme 171 * low memory situations. 172 * <li>If an activity is completely obscured by another activity, 173 * it is <em>stopped</em>. It still retains all state and member information, 174 * however, it is no longer visible to the user so its window is hidden 175 * and it will often be killed by the system when memory is needed 176 * elsewhere.</li> 177 * <li>If an activity is paused or stopped, the system can drop the activity 178 * from memory by either asking it to finish, or simply killing its 179 * process. When it is displayed again to the user, it must be 180 * completely restarted and restored to its previous state.</li> 181 * </ul> 182 * 183 * <p>The following diagram shows the important state paths of an Activity. 184 * The square rectangles represent callback methods you can implement to 185 * perform operations when the Activity moves between states. The colored 186 * ovals are major states the Activity can be in.</p> 187 * 188 * <p><img src="../../../images/activity_lifecycle.png" 189 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 190 * 191 * <p>There are three key loops you may be interested in monitoring within your 192 * activity: 193 * 194 * <ul> 195 * <li>The <b>entire lifetime</b> of an activity happens between the first call 196 * to {@link android.app.Activity#onCreate} through to a single final call 197 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 198 * of "global" state in onCreate(), and release all remaining resources in 199 * onDestroy(). For example, if it has a thread running in the background 200 * to download data from the network, it may create that thread in onCreate() 201 * and then stop the thread in onDestroy(). 202 * 203 * <li>The <b>visible lifetime</b> of an activity happens between a call to 204 * {@link android.app.Activity#onStart} until a corresponding call to 205 * {@link android.app.Activity#onStop}. During this time the user can see the 206 * activity on-screen, though it may not be in the foreground and interacting 207 * with the user. Between these two methods you can maintain resources that 208 * are needed to show the activity to the user. For example, you can register 209 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 210 * that impact your UI, and unregister it in onStop() when the user no 211 * longer sees what you are displaying. The onStart() and onStop() methods 212 * can be called multiple times, as the activity becomes visible and hidden 213 * to the user. 214 * 215 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 216 * {@link android.app.Activity#onResume} until a corresponding call to 217 * {@link android.app.Activity#onPause}. During this time the activity is 218 * in front of all other activities and interacting with the user. An activity 219 * can frequently go between the resumed and paused states -- for example when 220 * the device goes to sleep, when an activity result is delivered, when a new 221 * intent is delivered -- so the code in these methods should be fairly 222 * lightweight. 223 * </ul> 224 * 225 * <p>The entire lifecycle of an activity is defined by the following 226 * Activity methods. All of these are hooks that you can override 227 * to do appropriate work when the activity changes state. All 228 * activities will implement {@link android.app.Activity#onCreate} 229 * to do their initial setup; many will also implement 230 * {@link android.app.Activity#onPause} to commit changes to data and 231 * otherwise prepare to stop interacting with the user. You should always 232 * call up to your superclass when implementing these methods.</p> 233 * 234 * </p> 235 * <pre class="prettyprint"> 236 * public class Activity extends ApplicationContext { 237 * protected void onCreate(Bundle savedInstanceState); 238 * 239 * protected void onStart(); 240 * 241 * protected void onRestart(); 242 * 243 * protected void onResume(); 244 * 245 * protected void onPause(); 246 * 247 * protected void onStop(); 248 * 249 * protected void onDestroy(); 250 * } 251 * </pre> 252 * 253 * <p>In general the movement through an activity's lifecycle looks like 254 * this:</p> 255 * 256 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 257 * <colgroup align="left" span="3" /> 258 * <colgroup align="left" /> 259 * <colgroup align="center" /> 260 * <colgroup align="center" /> 261 * 262 * <thead> 263 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 264 * </thead> 265 * 266 * <tbody> 267 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 268 * <td>Called when the activity is first created. 269 * This is where you should do all of your normal static set up: 270 * create views, bind data to lists, etc. This method also 271 * provides you with a Bundle containing the activity's previously 272 * frozen state, if there was one. 273 * <p>Always followed by <code>onStart()</code>.</td> 274 * <td align="center">No</td> 275 * <td align="center"><code>onStart()</code></td> 276 * </tr> 277 * 278 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 279 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 280 * <td>Called after your activity has been stopped, prior to it being 281 * started again. 282 * <p>Always followed by <code>onStart()</code></td> 283 * <td align="center">No</td> 284 * <td align="center"><code>onStart()</code></td> 285 * </tr> 286 * 287 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 288 * <td>Called when the activity is becoming visible to the user. 289 * <p>Followed by <code>onResume()</code> if the activity comes 290 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 291 * <td align="center">No</td> 292 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 293 * </tr> 294 * 295 * <tr><td rowspan="2" style="border-left: none;"> </td> 296 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 297 * <td>Called when the activity will start 298 * interacting with the user. At this point your activity is at 299 * the top of the activity stack, with user input going to it. 300 * <p>Always followed by <code>onPause()</code>.</td> 301 * <td align="center">No</td> 302 * <td align="center"><code>onPause()</code></td> 303 * </tr> 304 * 305 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 306 * <td>Called when the system is about to start resuming a previous 307 * activity. This is typically used to commit unsaved changes to 308 * persistent data, stop animations and other things that may be consuming 309 * CPU, etc. Implementations of this method must be very quick because 310 * the next activity will not be resumed until this method returns. 311 * <p>Followed by either <code>onResume()</code> if the activity 312 * returns back to the front, or <code>onStop()</code> if it becomes 313 * invisible to the user.</td> 314 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 315 * <td align="center"><code>onResume()</code> or<br> 316 * <code>onStop()</code></td> 317 * </tr> 318 * 319 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 320 * <td>Called when the activity is no longer visible to the user, because 321 * another activity has been resumed and is covering this one. This 322 * may happen either because a new activity is being started, an existing 323 * one is being brought in front of this one, or this one is being 324 * destroyed. 325 * <p>Followed by either <code>onRestart()</code> if 326 * this activity is coming back to interact with the user, or 327 * <code>onDestroy()</code> if this activity is going away.</td> 328 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 329 * <td align="center"><code>onRestart()</code> or<br> 330 * <code>onDestroy()</code></td> 331 * </tr> 332 * 333 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 334 * <td>The final call you receive before your 335 * activity is destroyed. This can happen either because the 336 * activity is finishing (someone called {@link Activity#finish} on 337 * it, or because the system is temporarily destroying this 338 * instance of the activity to save space. You can distinguish 339 * between these two scenarios with the {@link 340 * Activity#isFinishing} method.</td> 341 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 342 * <td align="center"><em>nothing</em></td> 343 * </tr> 344 * </tbody> 345 * </table> 346 * 347 * <p>Note the "Killable" column in the above table -- for those methods that 348 * are marked as being killable, after that method returns the process hosting the 349 * activity may killed by the system <em>at any time</em> without another line 350 * of its code being executed. Because of this, you should use the 351 * {@link #onPause} method to write any persistent data (such as user edits) 352 * to storage. In addition, the method 353 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 354 * in such a background state, allowing you to save away any dynamic instance 355 * state in your activity into the given Bundle, to be later received in 356 * {@link #onCreate} if the activity needs to be re-created. 357 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 358 * section for more information on how the lifecycle of a process is tied 359 * to the activities it is hosting. Note that it is important to save 360 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 361 * because the latter is not part of the lifecycle callbacks, so will not 362 * be called in every situation as described in its documentation.</p> 363 * 364 * <p class="note">Be aware that these semantics will change slightly between 365 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 366 * vs. those targeting prior platforms. Starting with Honeycomb, an application 367 * is not in the killable state until its {@link #onStop} has returned. This 368 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 369 * safely called after {@link #onPause()} and allows and application to safely 370 * wait until {@link #onStop()} to save persistent state.</p> 371 * 372 * <p>For those methods that are not marked as being killable, the activity's 373 * process will not be killed by the system starting from the time the method 374 * is called and continuing after it returns. Thus an activity is in the killable 375 * state, for example, between after <code>onPause()</code> to the start of 376 * <code>onResume()</code>.</p> 377 * 378 * <a name="ConfigurationChanges"></a> 379 * <h3>Configuration Changes</h3> 380 * 381 * <p>If the configuration of the device (as defined by the 382 * {@link Configuration Resources.Configuration} class) changes, 383 * then anything displaying a user interface will need to update to match that 384 * configuration. Because Activity is the primary mechanism for interacting 385 * with the user, it includes special support for handling configuration 386 * changes.</p> 387 * 388 * <p>Unless you specify otherwise, a configuration change (such as a change 389 * in screen orientation, language, input devices, etc) will cause your 390 * current activity to be <em>destroyed</em>, going through the normal activity 391 * lifecycle process of {@link #onPause}, 392 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 393 * had been in the foreground or visible to the user, once {@link #onDestroy} is 394 * called in that instance then a new instance of the activity will be 395 * created, with whatever savedInstanceState the previous instance had generated 396 * from {@link #onSaveInstanceState}.</p> 397 * 398 * <p>This is done because any application resource, 399 * including layout files, can change based on any configuration value. Thus 400 * the only safe way to handle a configuration change is to re-retrieve all 401 * resources, including layouts, drawables, and strings. Because activities 402 * must already know how to save their state and re-create themselves from 403 * that state, this is a convenient way to have an activity restart itself 404 * with a new configuration.</p> 405 * 406 * <p>In some special cases, you may want to bypass restarting of your 407 * activity based on one or more types of configuration changes. This is 408 * done with the {@link android.R.attr#configChanges android:configChanges} 409 * attribute in its manifest. For any types of configuration changes you say 410 * that you handle there, you will receive a call to your current activity's 411 * {@link #onConfigurationChanged} method instead of being restarted. If 412 * a configuration change involves any that you do not handle, however, the 413 * activity will still be restarted and {@link #onConfigurationChanged} 414 * will not be called.</p> 415 * 416 * <a name="StartingActivities"></a> 417 * <h3>Starting Activities and Getting Results</h3> 418 * 419 * <p>The {@link android.app.Activity#startActivity} 420 * method is used to start a 421 * new activity, which will be placed at the top of the activity stack. It 422 * takes a single argument, an {@link android.content.Intent Intent}, 423 * which describes the activity 424 * to be executed.</p> 425 * 426 * <p>Sometimes you want to get a result back from an activity when it 427 * ends. For example, you may start an activity that lets the user pick 428 * a person in a list of contacts; when it ends, it returns the person 429 * that was selected. To do this, you call the 430 * {@link android.app.Activity#startActivityForResult(Intent, int)} 431 * version with a second integer parameter identifying the call. The result 432 * will come back through your {@link android.app.Activity#onActivityResult} 433 * method.</p> 434 * 435 * <p>When an activity exits, it can call 436 * {@link android.app.Activity#setResult(int)} 437 * to return data back to its parent. It must always supply a result code, 438 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 439 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 440 * return back an Intent containing any additional data it wants. All of this 441 * information appears back on the 442 * parent's <code>Activity.onActivityResult()</code>, along with the integer 443 * identifier it originally supplied.</p> 444 * 445 * <p>If a child activity fails for any reason (such as crashing), the parent 446 * activity will receive a result with the code RESULT_CANCELED.</p> 447 * 448 * <pre class="prettyprint"> 449 * public class MyActivity extends Activity { 450 * ... 451 * 452 * static final int PICK_CONTACT_REQUEST = 0; 453 * 454 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 455 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 456 * // When the user center presses, let them pick a contact. 457 * startActivityForResult( 458 * new Intent(Intent.ACTION_PICK, 459 * new Uri("content://contacts")), 460 * PICK_CONTACT_REQUEST); 461 * return true; 462 * } 463 * return false; 464 * } 465 * 466 * protected void onActivityResult(int requestCode, int resultCode, 467 * Intent data) { 468 * if (requestCode == PICK_CONTACT_REQUEST) { 469 * if (resultCode == RESULT_OK) { 470 * // A contact was picked. Here we will just display it 471 * // to the user. 472 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 473 * } 474 * } 475 * } 476 * } 477 * </pre> 478 * 479 * <a name="SavingPersistentState"></a> 480 * <h3>Saving Persistent State</h3> 481 * 482 * <p>There are generally two kinds of persistent state than an activity 483 * will deal with: shared document-like data (typically stored in a SQLite 484 * database using a {@linkplain android.content.ContentProvider content provider}) 485 * and internal state such as user preferences.</p> 486 * 487 * <p>For content provider data, we suggest that activities use a 488 * "edit in place" user model. That is, any edits a user makes are effectively 489 * made immediately without requiring an additional confirmation step. 490 * Supporting this model is generally a simple matter of following two rules:</p> 491 * 492 * <ul> 493 * <li> <p>When creating a new document, the backing database entry or file for 494 * it is created immediately. For example, if the user chooses to write 495 * a new e-mail, a new entry for that e-mail is created as soon as they 496 * start entering data, so that if they go to any other activity after 497 * that point this e-mail will now appear in the list of drafts.</p> 498 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 499 * commit to the backing content provider or file any changes the user 500 * has made. This ensures that those changes will be seen by any other 501 * activity that is about to run. You will probably want to commit 502 * your data even more aggressively at key times during your 503 * activity's lifecycle: for example before starting a new 504 * activity, before finishing your own activity, when the user 505 * switches between input fields, etc.</p> 506 * </ul> 507 * 508 * <p>This model is designed to prevent data loss when a user is navigating 509 * between activities, and allows the system to safely kill an activity (because 510 * system resources are needed somewhere else) at any time after it has been 511 * paused. Note this implies 512 * that the user pressing BACK from your activity does <em>not</em> 513 * mean "cancel" -- it means to leave the activity with its current contents 514 * saved away. Canceling edits in an activity must be provided through 515 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 516 * 517 * <p>See the {@linkplain android.content.ContentProvider content package} for 518 * more information about content providers. These are a key aspect of how 519 * different activities invoke and propagate data between themselves.</p> 520 * 521 * <p>The Activity class also provides an API for managing internal persistent state 522 * associated with an activity. This can be used, for example, to remember 523 * the user's preferred initial display in a calendar (day view or week view) 524 * or the user's default home page in a web browser.</p> 525 * 526 * <p>Activity persistent state is managed 527 * with the method {@link #getPreferences}, 528 * allowing you to retrieve and 529 * modify a set of name/value pairs associated with the activity. To use 530 * preferences that are shared across multiple application components 531 * (activities, receivers, services, providers), you can use the underlying 532 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 533 * to retrieve a preferences 534 * object stored under a specific name. 535 * (Note that it is not possible to share settings data across application 536 * packages -- for that you will need a content provider.)</p> 537 * 538 * <p>Here is an excerpt from a calendar activity that stores the user's 539 * preferred view mode in its persistent settings:</p> 540 * 541 * <pre class="prettyprint"> 542 * public class CalendarActivity extends Activity { 543 * ... 544 * 545 * static final int DAY_VIEW_MODE = 0; 546 * static final int WEEK_VIEW_MODE = 1; 547 * 548 * private SharedPreferences mPrefs; 549 * private int mCurViewMode; 550 * 551 * protected void onCreate(Bundle savedInstanceState) { 552 * super.onCreate(savedInstanceState); 553 * 554 * SharedPreferences mPrefs = getSharedPreferences(); 555 * mCurViewMode = mPrefs.getInt("view_mode", DAY_VIEW_MODE); 556 * } 557 * 558 * protected void onPause() { 559 * super.onPause(); 560 * 561 * SharedPreferences.Editor ed = mPrefs.edit(); 562 * ed.putInt("view_mode", mCurViewMode); 563 * ed.commit(); 564 * } 565 * } 566 * </pre> 567 * 568 * <a name="Permissions"></a> 569 * <h3>Permissions</h3> 570 * 571 * <p>The ability to start a particular Activity can be enforced when it is 572 * declared in its 573 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 574 * tag. By doing so, other applications will need to declare a corresponding 575 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 576 * element in their own manifest to be able to start that activity. 577 * 578 * <p>When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 579 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 580 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the 581 * Activity access to the specific URIs in the Intent. Access will remain 582 * until the Activity has finished (it will remain across the hosting 583 * process being killed and other temporary destruction). As of 584 * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity 585 * was already created and a new Intent is being delivered to 586 * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added 587 * to the existing ones it holds. 588 * 589 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 590 * document for more information on permissions and security in general. 591 * 592 * <a name="ProcessLifecycle"></a> 593 * <h3>Process Lifecycle</h3> 594 * 595 * <p>The Android system attempts to keep application process around for as 596 * long as possible, but eventually will need to remove old processes when 597 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 598 * Lifecycle</a>, the decision about which process to remove is intimately 599 * tied to the state of the user's interaction with it. In general, there 600 * are four states a process can be in based on the activities running in it, 601 * listed here in order of importance. The system will kill less important 602 * processes (the last ones) before it resorts to killing more important 603 * processes (the first ones). 604 * 605 * <ol> 606 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 607 * that the user is currently interacting with) is considered the most important. 608 * Its process will only be killed as a last resort, if it uses more memory 609 * than is available on the device. Generally at this point the device has 610 * reached a memory paging state, so this is required in order to keep the user 611 * interface responsive. 612 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 613 * but not in the foreground, such as one sitting behind a foreground dialog) 614 * is considered extremely important and will not be killed unless that is 615 * required to keep the foreground activity running. 616 * <li> <p>A <b>background activity</b> (an activity that is not visible to 617 * the user and has been paused) is no longer critical, so the system may 618 * safely kill its process to reclaim memory for other foreground or 619 * visible processes. If its process needs to be killed, when the user navigates 620 * back to the activity (making it visible on the screen again), its 621 * {@link #onCreate} method will be called with the savedInstanceState it had previously 622 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 623 * state as the user last left it. 624 * <li> <p>An <b>empty process</b> is one hosting no activities or other 625 * application components (such as {@link Service} or 626 * {@link android.content.BroadcastReceiver} classes). These are killed very 627 * quickly by the system as memory becomes low. For this reason, any 628 * background operation you do outside of an activity must be executed in the 629 * context of an activity BroadcastReceiver or Service to ensure that the system 630 * knows it needs to keep your process around. 631 * </ol> 632 * 633 * <p>Sometimes an Activity may need to do a long-running operation that exists 634 * independently of the activity lifecycle itself. An example may be a camera 635 * application that allows you to upload a picture to a web site. The upload 636 * may take a long time, and the application should allow the user to leave 637 * the application will it is executing. To accomplish this, your Activity 638 * should start a {@link Service} in which the upload takes place. This allows 639 * the system to properly prioritize your process (considering it to be more 640 * important than other non-visible applications) for the duration of the 641 * upload, independent of whether the original activity is paused, stopped, 642 * or finished. 643 */ 644public class Activity extends ContextThemeWrapper 645 implements LayoutInflater.Factory2, 646 Window.Callback, KeyEvent.Callback, 647 OnCreateContextMenuListener, ComponentCallbacks2 { 648 private static final String TAG = "Activity"; 649 private static final boolean DEBUG_LIFECYCLE = false; 650 651 /** Standard activity result: operation canceled. */ 652 public static final int RESULT_CANCELED = 0; 653 /** Standard activity result: operation succeeded. */ 654 public static final int RESULT_OK = -1; 655 /** Start of user-defined activity results. */ 656 public static final int RESULT_FIRST_USER = 1; 657 658 static final String FRAGMENTS_TAG = "android:fragments"; 659 660 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 661 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 662 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 663 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 664 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 665 666 private static class ManagedDialog { 667 Dialog mDialog; 668 Bundle mArgs; 669 } 670 private SparseArray<ManagedDialog> mManagedDialogs; 671 672 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 673 private Instrumentation mInstrumentation; 674 private IBinder mToken; 675 private int mIdent; 676 /*package*/ String mEmbeddedID; 677 private Application mApplication; 678 /*package*/ Intent mIntent; 679 private ComponentName mComponent; 680 /*package*/ ActivityInfo mActivityInfo; 681 /*package*/ ActivityThread mMainThread; 682 Activity mParent; 683 boolean mCalled; 684 boolean mCheckedForLoaderManager; 685 boolean mLoadersStarted; 686 /*package*/ boolean mResumed; 687 private boolean mStopped; 688 boolean mFinished; 689 boolean mStartedActivity; 690 private boolean mDestroyed; 691 private boolean mDoReportFullyDrawn = true; 692 /** true if the activity is going through a transient pause */ 693 /*package*/ boolean mTemporaryPause = false; 694 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 695 /*package*/ boolean mChangingConfigurations = false; 696 /*package*/ int mConfigChangeFlags; 697 /*package*/ Configuration mCurrentConfig; 698 private SearchManager mSearchManager; 699 private MenuInflater mMenuInflater; 700 701 static final class NonConfigurationInstances { 702 Object activity; 703 HashMap<String, Object> children; 704 ArrayList<Fragment> fragments; 705 ArrayMap<String, LoaderManagerImpl> loaders; 706 } 707 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 708 709 private Window mWindow; 710 711 private WindowManager mWindowManager; 712 /*package*/ View mDecor = null; 713 /*package*/ boolean mWindowAdded = false; 714 /*package*/ boolean mVisibleFromServer = false; 715 /*package*/ boolean mVisibleFromClient = true; 716 /*package*/ ActionBarImpl mActionBar = null; 717 private boolean mEnableDefaultActionBarUp; 718 719 private CharSequence mTitle; 720 private int mTitleColor = 0; 721 722 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 723 final FragmentContainer mContainer = new FragmentContainer() { 724 @Override 725 public View findViewById(int id) { 726 return Activity.this.findViewById(id); 727 } 728 }; 729 730 ArrayMap<String, LoaderManagerImpl> mAllLoaderManagers; 731 LoaderManagerImpl mLoaderManager; 732 733 private static final class ManagedCursor { 734 ManagedCursor(Cursor cursor) { 735 mCursor = cursor; 736 mReleased = false; 737 mUpdated = false; 738 } 739 740 private final Cursor mCursor; 741 private boolean mReleased; 742 private boolean mUpdated; 743 } 744 private final ArrayList<ManagedCursor> mManagedCursors = 745 new ArrayList<ManagedCursor>(); 746 747 // protected by synchronized (this) 748 int mResultCode = RESULT_CANCELED; 749 Intent mResultData = null; 750 private TranslucentConversionListener mTranslucentCallback; 751 private boolean mChangeCanvasToTranslucent; 752 753 private boolean mTitleReady = false; 754 755 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 756 private SpannableStringBuilder mDefaultKeySsb = null; 757 758 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 759 760 @SuppressWarnings("unused") 761 private final Object mInstanceTracker = StrictMode.trackActivity(this); 762 763 private Thread mUiThread; 764 final Handler mHandler = new Handler(); 765 766 /** Return the intent that started this activity. */ 767 public Intent getIntent() { 768 return mIntent; 769 } 770 771 /** 772 * Change the intent returned by {@link #getIntent}. This holds a 773 * reference to the given intent; it does not copy it. Often used in 774 * conjunction with {@link #onNewIntent}. 775 * 776 * @param newIntent The new Intent object to return from getIntent 777 * 778 * @see #getIntent 779 * @see #onNewIntent 780 */ 781 public void setIntent(Intent newIntent) { 782 mIntent = newIntent; 783 } 784 785 /** Return the application that owns this activity. */ 786 public final Application getApplication() { 787 return mApplication; 788 } 789 790 /** Is this activity embedded inside of another activity? */ 791 public final boolean isChild() { 792 return mParent != null; 793 } 794 795 /** Return the parent activity if this view is an embedded child. */ 796 public final Activity getParent() { 797 return mParent; 798 } 799 800 /** Retrieve the window manager for showing custom windows. */ 801 public WindowManager getWindowManager() { 802 return mWindowManager; 803 } 804 805 /** 806 * Retrieve the current {@link android.view.Window} for the activity. 807 * This can be used to directly access parts of the Window API that 808 * are not available through Activity/Screen. 809 * 810 * @return Window The current window, or null if the activity is not 811 * visual. 812 */ 813 public Window getWindow() { 814 return mWindow; 815 } 816 817 /** 818 * Return the LoaderManager for this fragment, creating it if needed. 819 */ 820 public LoaderManager getLoaderManager() { 821 if (mLoaderManager != null) { 822 return mLoaderManager; 823 } 824 mCheckedForLoaderManager = true; 825 mLoaderManager = getLoaderManager("(root)", mLoadersStarted, true); 826 return mLoaderManager; 827 } 828 829 LoaderManagerImpl getLoaderManager(String who, boolean started, boolean create) { 830 if (mAllLoaderManagers == null) { 831 mAllLoaderManagers = new ArrayMap<String, LoaderManagerImpl>(); 832 } 833 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 834 if (lm == null) { 835 if (create) { 836 lm = new LoaderManagerImpl(who, this, started); 837 mAllLoaderManagers.put(who, lm); 838 } 839 } else { 840 lm.updateActivity(this); 841 } 842 return lm; 843 } 844 845 /** 846 * Calls {@link android.view.Window#getCurrentFocus} on the 847 * Window of this Activity to return the currently focused view. 848 * 849 * @return View The current View with focus or null. 850 * 851 * @see #getWindow 852 * @see android.view.Window#getCurrentFocus 853 */ 854 public View getCurrentFocus() { 855 return mWindow != null ? mWindow.getCurrentFocus() : null; 856 } 857 858 /** 859 * Called when the activity is starting. This is where most initialization 860 * should go: calling {@link #setContentView(int)} to inflate the 861 * activity's UI, using {@link #findViewById} to programmatically interact 862 * with widgets in the UI, calling 863 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 864 * cursors for data being displayed, etc. 865 * 866 * <p>You can call {@link #finish} from within this function, in 867 * which case onDestroy() will be immediately called without any of the rest 868 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 869 * {@link #onPause}, etc) executing. 870 * 871 * <p><em>Derived classes must call through to the super class's 872 * implementation of this method. If they do not, an exception will be 873 * thrown.</em></p> 874 * 875 * @param savedInstanceState If the activity is being re-initialized after 876 * previously being shut down then this Bundle contains the data it most 877 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 878 * 879 * @see #onStart 880 * @see #onSaveInstanceState 881 * @see #onRestoreInstanceState 882 * @see #onPostCreate 883 */ 884 protected void onCreate(Bundle savedInstanceState) { 885 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState); 886 if (mLastNonConfigurationInstances != null) { 887 mAllLoaderManagers = mLastNonConfigurationInstances.loaders; 888 } 889 if (mActivityInfo.parentActivityName != null) { 890 if (mActionBar == null) { 891 mEnableDefaultActionBarUp = true; 892 } else { 893 mActionBar.setDefaultDisplayHomeAsUpEnabled(true); 894 } 895 } 896 if (savedInstanceState != null) { 897 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 898 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 899 ? mLastNonConfigurationInstances.fragments : null); 900 } 901 mFragments.dispatchCreate(); 902 getApplication().dispatchActivityCreated(this, savedInstanceState); 903 mCalled = true; 904 } 905 906 /** 907 * The hook for {@link ActivityThread} to restore the state of this activity. 908 * 909 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 910 * {@link #restoreManagedDialogs(android.os.Bundle)}. 911 * 912 * @param savedInstanceState contains the saved state 913 */ 914 final void performRestoreInstanceState(Bundle savedInstanceState) { 915 onRestoreInstanceState(savedInstanceState); 916 restoreManagedDialogs(savedInstanceState); 917 } 918 919 /** 920 * This method is called after {@link #onStart} when the activity is 921 * being re-initialized from a previously saved state, given here in 922 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 923 * to restore their state, but it is sometimes convenient to do it here 924 * after all of the initialization has been done or to allow subclasses to 925 * decide whether to use your default implementation. The default 926 * implementation of this method performs a restore of any view state that 927 * had previously been frozen by {@link #onSaveInstanceState}. 928 * 929 * <p>This method is called between {@link #onStart} and 930 * {@link #onPostCreate}. 931 * 932 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 933 * 934 * @see #onCreate 935 * @see #onPostCreate 936 * @see #onResume 937 * @see #onSaveInstanceState 938 */ 939 protected void onRestoreInstanceState(Bundle savedInstanceState) { 940 if (mWindow != null) { 941 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 942 if (windowState != null) { 943 mWindow.restoreHierarchyState(windowState); 944 } 945 } 946 } 947 948 /** 949 * Restore the state of any saved managed dialogs. 950 * 951 * @param savedInstanceState The bundle to restore from. 952 */ 953 private void restoreManagedDialogs(Bundle savedInstanceState) { 954 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 955 if (b == null) { 956 return; 957 } 958 959 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 960 final int numDialogs = ids.length; 961 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 962 for (int i = 0; i < numDialogs; i++) { 963 final Integer dialogId = ids[i]; 964 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 965 if (dialogState != null) { 966 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 967 // so tell createDialog() not to do it, otherwise we get an exception 968 final ManagedDialog md = new ManagedDialog(); 969 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 970 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 971 if (md.mDialog != null) { 972 mManagedDialogs.put(dialogId, md); 973 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 974 md.mDialog.onRestoreInstanceState(dialogState); 975 } 976 } 977 } 978 } 979 980 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 981 final Dialog dialog = onCreateDialog(dialogId, args); 982 if (dialog == null) { 983 return null; 984 } 985 dialog.dispatchOnCreate(state); 986 return dialog; 987 } 988 989 private static String savedDialogKeyFor(int key) { 990 return SAVED_DIALOG_KEY_PREFIX + key; 991 } 992 993 private static String savedDialogArgsKeyFor(int key) { 994 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 995 } 996 997 /** 998 * Called when activity start-up is complete (after {@link #onStart} 999 * and {@link #onRestoreInstanceState} have been called). Applications will 1000 * generally not implement this method; it is intended for system 1001 * classes to do final initialization after application code has run. 1002 * 1003 * <p><em>Derived classes must call through to the super class's 1004 * implementation of this method. If they do not, an exception will be 1005 * thrown.</em></p> 1006 * 1007 * @param savedInstanceState If the activity is being re-initialized after 1008 * previously being shut down then this Bundle contains the data it most 1009 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1010 * @see #onCreate 1011 */ 1012 protected void onPostCreate(Bundle savedInstanceState) { 1013 if (!isChild()) { 1014 mTitleReady = true; 1015 onTitleChanged(getTitle(), getTitleColor()); 1016 } 1017 mCalled = true; 1018 } 1019 1020 /** 1021 * Called after {@link #onCreate} — or after {@link #onRestart} when 1022 * the activity had been stopped, but is now again being displayed to the 1023 * user. It will be followed by {@link #onResume}. 1024 * 1025 * <p><em>Derived classes must call through to the super class's 1026 * implementation of this method. If they do not, an exception will be 1027 * thrown.</em></p> 1028 * 1029 * @see #onCreate 1030 * @see #onStop 1031 * @see #onResume 1032 */ 1033 protected void onStart() { 1034 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStart " + this); 1035 mCalled = true; 1036 1037 if (!mLoadersStarted) { 1038 mLoadersStarted = true; 1039 if (mLoaderManager != null) { 1040 mLoaderManager.doStart(); 1041 } else if (!mCheckedForLoaderManager) { 1042 mLoaderManager = getLoaderManager("(root)", mLoadersStarted, false); 1043 } 1044 mCheckedForLoaderManager = true; 1045 } 1046 1047 getApplication().dispatchActivityStarted(this); 1048 } 1049 1050 /** 1051 * Called after {@link #onStop} when the current activity is being 1052 * re-displayed to the user (the user has navigated back to it). It will 1053 * be followed by {@link #onStart} and then {@link #onResume}. 1054 * 1055 * <p>For activities that are using raw {@link Cursor} objects (instead of 1056 * creating them through 1057 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1058 * this is usually the place 1059 * where the cursor should be requeried (because you had deactivated it in 1060 * {@link #onStop}. 1061 * 1062 * <p><em>Derived classes must call through to the super class's 1063 * implementation of this method. If they do not, an exception will be 1064 * thrown.</em></p> 1065 * 1066 * @see #onStop 1067 * @see #onStart 1068 * @see #onResume 1069 */ 1070 protected void onRestart() { 1071 mCalled = true; 1072 } 1073 1074 /** 1075 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1076 * {@link #onPause}, for your activity to start interacting with the user. 1077 * This is a good place to begin animations, open exclusive-access devices 1078 * (such as the camera), etc. 1079 * 1080 * <p>Keep in mind that onResume is not the best indicator that your activity 1081 * is visible to the user; a system window such as the keyguard may be in 1082 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1083 * activity is visible to the user (for example, to resume a game). 1084 * 1085 * <p><em>Derived classes must call through to the super class's 1086 * implementation of this method. If they do not, an exception will be 1087 * thrown.</em></p> 1088 * 1089 * @see #onRestoreInstanceState 1090 * @see #onRestart 1091 * @see #onPostResume 1092 * @see #onPause 1093 */ 1094 protected void onResume() { 1095 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this); 1096 getApplication().dispatchActivityResumed(this); 1097 mCalled = true; 1098 } 1099 1100 /** 1101 * Called when activity resume is complete (after {@link #onResume} has 1102 * been called). Applications will generally not implement this method; 1103 * it is intended for system classes to do final setup after application 1104 * resume code has run. 1105 * 1106 * <p><em>Derived classes must call through to the super class's 1107 * implementation of this method. If they do not, an exception will be 1108 * thrown.</em></p> 1109 * 1110 * @see #onResume 1111 */ 1112 protected void onPostResume() { 1113 final Window win = getWindow(); 1114 if (win != null) win.makeActive(); 1115 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1116 mCalled = true; 1117 } 1118 1119 /** 1120 * This is called for activities that set launchMode to "singleTop" in 1121 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1122 * flag when calling {@link #startActivity}. In either case, when the 1123 * activity is re-launched while at the top of the activity stack instead 1124 * of a new instance of the activity being started, onNewIntent() will be 1125 * called on the existing instance with the Intent that was used to 1126 * re-launch it. 1127 * 1128 * <p>An activity will always be paused before receiving a new intent, so 1129 * you can count on {@link #onResume} being called after this method. 1130 * 1131 * <p>Note that {@link #getIntent} still returns the original Intent. You 1132 * can use {@link #setIntent} to update it to this new Intent. 1133 * 1134 * @param intent The new intent that was started for the activity. 1135 * 1136 * @see #getIntent 1137 * @see #setIntent 1138 * @see #onResume 1139 */ 1140 protected void onNewIntent(Intent intent) { 1141 } 1142 1143 /** 1144 * The hook for {@link ActivityThread} to save the state of this activity. 1145 * 1146 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1147 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1148 * 1149 * @param outState The bundle to save the state to. 1150 */ 1151 final void performSaveInstanceState(Bundle outState) { 1152 onSaveInstanceState(outState); 1153 saveManagedDialogs(outState); 1154 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState); 1155 } 1156 1157 /** 1158 * Called to retrieve per-instance state from an activity before being killed 1159 * so that the state can be restored in {@link #onCreate} or 1160 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1161 * will be passed to both). 1162 * 1163 * <p>This method is called before an activity may be killed so that when it 1164 * comes back some time in the future it can restore its state. For example, 1165 * if activity B is launched in front of activity A, and at some point activity 1166 * A is killed to reclaim resources, activity A will have a chance to save the 1167 * current state of its user interface via this method so that when the user 1168 * returns to activity A, the state of the user interface can be restored 1169 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1170 * 1171 * <p>Do not confuse this method with activity lifecycle callbacks such as 1172 * {@link #onPause}, which is always called when an activity is being placed 1173 * in the background or on its way to destruction, or {@link #onStop} which 1174 * is called before destruction. One example of when {@link #onPause} and 1175 * {@link #onStop} is called and not this method is when a user navigates back 1176 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1177 * on B because that particular instance will never be restored, so the 1178 * system avoids calling it. An example when {@link #onPause} is called and 1179 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1180 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1181 * killed during the lifetime of B since the state of the user interface of 1182 * A will stay intact. 1183 * 1184 * <p>The default implementation takes care of most of the UI per-instance 1185 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1186 * view in the hierarchy that has an id, and by saving the id of the currently 1187 * focused view (all of which is restored by the default implementation of 1188 * {@link #onRestoreInstanceState}). If you override this method to save additional 1189 * information not captured by each individual view, you will likely want to 1190 * call through to the default implementation, otherwise be prepared to save 1191 * all of the state of each view yourself. 1192 * 1193 * <p>If called, this method will occur before {@link #onStop}. There are 1194 * no guarantees about whether it will occur before or after {@link #onPause}. 1195 * 1196 * @param outState Bundle in which to place your saved state. 1197 * 1198 * @see #onCreate 1199 * @see #onRestoreInstanceState 1200 * @see #onPause 1201 */ 1202 protected void onSaveInstanceState(Bundle outState) { 1203 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1204 Parcelable p = mFragments.saveAllState(); 1205 if (p != null) { 1206 outState.putParcelable(FRAGMENTS_TAG, p); 1207 } 1208 getApplication().dispatchActivitySaveInstanceState(this, outState); 1209 } 1210 1211 /** 1212 * Save the state of any managed dialogs. 1213 * 1214 * @param outState place to store the saved state. 1215 */ 1216 private void saveManagedDialogs(Bundle outState) { 1217 if (mManagedDialogs == null) { 1218 return; 1219 } 1220 1221 final int numDialogs = mManagedDialogs.size(); 1222 if (numDialogs == 0) { 1223 return; 1224 } 1225 1226 Bundle dialogState = new Bundle(); 1227 1228 int[] ids = new int[mManagedDialogs.size()]; 1229 1230 // save each dialog's bundle, gather the ids 1231 for (int i = 0; i < numDialogs; i++) { 1232 final int key = mManagedDialogs.keyAt(i); 1233 ids[i] = key; 1234 final ManagedDialog md = mManagedDialogs.valueAt(i); 1235 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1236 if (md.mArgs != null) { 1237 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1238 } 1239 } 1240 1241 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1242 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1243 } 1244 1245 1246 /** 1247 * Called as part of the activity lifecycle when an activity is going into 1248 * the background, but has not (yet) been killed. The counterpart to 1249 * {@link #onResume}. 1250 * 1251 * <p>When activity B is launched in front of activity A, this callback will 1252 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1253 * so be sure to not do anything lengthy here. 1254 * 1255 * <p>This callback is mostly used for saving any persistent state the 1256 * activity is editing, to present a "edit in place" model to the user and 1257 * making sure nothing is lost if there are not enough resources to start 1258 * the new activity without first killing this one. This is also a good 1259 * place to do things like stop animations and other things that consume a 1260 * noticeable amount of CPU in order to make the switch to the next activity 1261 * as fast as possible, or to close resources that are exclusive access 1262 * such as the camera. 1263 * 1264 * <p>In situations where the system needs more memory it may kill paused 1265 * processes to reclaim resources. Because of this, you should be sure 1266 * that all of your state is saved by the time you return from 1267 * this function. In general {@link #onSaveInstanceState} is used to save 1268 * per-instance state in the activity and this method is used to store 1269 * global persistent data (in content providers, files, etc.) 1270 * 1271 * <p>After receiving this call you will usually receive a following call 1272 * to {@link #onStop} (after the next activity has been resumed and 1273 * displayed), however in some cases there will be a direct call back to 1274 * {@link #onResume} without going through the stopped state. 1275 * 1276 * <p><em>Derived classes must call through to the super class's 1277 * implementation of this method. If they do not, an exception will be 1278 * thrown.</em></p> 1279 * 1280 * @see #onResume 1281 * @see #onSaveInstanceState 1282 * @see #onStop 1283 */ 1284 protected void onPause() { 1285 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this); 1286 getApplication().dispatchActivityPaused(this); 1287 mCalled = true; 1288 } 1289 1290 /** 1291 * Called as part of the activity lifecycle when an activity is about to go 1292 * into the background as the result of user choice. For example, when the 1293 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1294 * when an incoming phone call causes the in-call Activity to be automatically 1295 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1296 * the activity being interrupted. In cases when it is invoked, this method 1297 * is called right before the activity's {@link #onPause} callback. 1298 * 1299 * <p>This callback and {@link #onUserInteraction} are intended to help 1300 * activities manage status bar notifications intelligently; specifically, 1301 * for helping activities determine the proper time to cancel a notfication. 1302 * 1303 * @see #onUserInteraction() 1304 */ 1305 protected void onUserLeaveHint() { 1306 } 1307 1308 /** 1309 * Generate a new thumbnail for this activity. This method is called before 1310 * pausing the activity, and should draw into <var>outBitmap</var> the 1311 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1312 * can use the given <var>canvas</var>, which is configured to draw into the 1313 * bitmap, for rendering if desired. 1314 * 1315 * <p>The default implementation returns fails and does not draw a thumbnail; 1316 * this will result in the platform creating its own thumbnail if needed. 1317 * 1318 * @param outBitmap The bitmap to contain the thumbnail. 1319 * @param canvas Can be used to render into the bitmap. 1320 * 1321 * @return Return true if you have drawn into the bitmap; otherwise after 1322 * you return it will be filled with a default thumbnail. 1323 * 1324 * @see #onCreateDescription 1325 * @see #onSaveInstanceState 1326 * @see #onPause 1327 */ 1328 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1329 return false; 1330 } 1331 1332 /** 1333 * Generate a new description for this activity. This method is called 1334 * before pausing the activity and can, if desired, return some textual 1335 * description of its current state to be displayed to the user. 1336 * 1337 * <p>The default implementation returns null, which will cause you to 1338 * inherit the description from the previous activity. If all activities 1339 * return null, generally the label of the top activity will be used as the 1340 * description. 1341 * 1342 * @return A description of what the user is doing. It should be short and 1343 * sweet (only a few words). 1344 * 1345 * @see #onCreateThumbnail 1346 * @see #onSaveInstanceState 1347 * @see #onPause 1348 */ 1349 public CharSequence onCreateDescription() { 1350 return null; 1351 } 1352 1353 /** 1354 * This is called when the user is requesting an assist, to build a full 1355 * {@link Intent#ACTION_ASSIST} Intent with all of the context of the current 1356 * application. You can override this method to place into the bundle anything 1357 * you would like to appear in the {@link Intent#EXTRA_ASSIST_CONTEXT} part 1358 * of the assist Intent. The default implementation does nothing. 1359 * 1360 * <p>This function will be called after any global assist callbacks that had 1361 * been registered with {@link Application#registerOnProvideAssistDataListener 1362 * Application.registerOnProvideAssistDataListener}. 1363 */ 1364 public void onProvideAssistData(Bundle data) { 1365 } 1366 1367 /** 1368 * Called when you are no longer visible to the user. You will next 1369 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1370 * depending on later user activity. 1371 * 1372 * <p>Note that this method may never be called, in low memory situations 1373 * where the system does not have enough memory to keep your activity's 1374 * process running after its {@link #onPause} method is called. 1375 * 1376 * <p><em>Derived classes must call through to the super class's 1377 * implementation of this method. If they do not, an exception will be 1378 * thrown.</em></p> 1379 * 1380 * @see #onRestart 1381 * @see #onResume 1382 * @see #onSaveInstanceState 1383 * @see #onDestroy 1384 */ 1385 protected void onStop() { 1386 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStop " + this); 1387 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1388 getApplication().dispatchActivityStopped(this); 1389 mTranslucentCallback = null; 1390 mCalled = true; 1391 } 1392 1393 /** 1394 * Perform any final cleanup before an activity is destroyed. This can 1395 * happen either because the activity is finishing (someone called 1396 * {@link #finish} on it, or because the system is temporarily destroying 1397 * this instance of the activity to save space. You can distinguish 1398 * between these two scenarios with the {@link #isFinishing} method. 1399 * 1400 * <p><em>Note: do not count on this method being called as a place for 1401 * saving data! For example, if an activity is editing data in a content 1402 * provider, those edits should be committed in either {@link #onPause} or 1403 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1404 * free resources like threads that are associated with an activity, so 1405 * that a destroyed activity does not leave such things around while the 1406 * rest of its application is still running. There are situations where 1407 * the system will simply kill the activity's hosting process without 1408 * calling this method (or any others) in it, so it should not be used to 1409 * do things that are intended to remain around after the process goes 1410 * away. 1411 * 1412 * <p><em>Derived classes must call through to the super class's 1413 * implementation of this method. If they do not, an exception will be 1414 * thrown.</em></p> 1415 * 1416 * @see #onPause 1417 * @see #onStop 1418 * @see #finish 1419 * @see #isFinishing 1420 */ 1421 protected void onDestroy() { 1422 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onDestroy " + this); 1423 mCalled = true; 1424 1425 // dismiss any dialogs we are managing. 1426 if (mManagedDialogs != null) { 1427 final int numDialogs = mManagedDialogs.size(); 1428 for (int i = 0; i < numDialogs; i++) { 1429 final ManagedDialog md = mManagedDialogs.valueAt(i); 1430 if (md.mDialog.isShowing()) { 1431 md.mDialog.dismiss(); 1432 } 1433 } 1434 mManagedDialogs = null; 1435 } 1436 1437 // close any cursors we are managing. 1438 synchronized (mManagedCursors) { 1439 int numCursors = mManagedCursors.size(); 1440 for (int i = 0; i < numCursors; i++) { 1441 ManagedCursor c = mManagedCursors.get(i); 1442 if (c != null) { 1443 c.mCursor.close(); 1444 } 1445 } 1446 mManagedCursors.clear(); 1447 } 1448 1449 // Close any open search dialog 1450 if (mSearchManager != null) { 1451 mSearchManager.stopSearch(); 1452 } 1453 1454 getApplication().dispatchActivityDestroyed(this); 1455 } 1456 1457 /** 1458 * Report to the system that your app is now fully drawn. This is only used 1459 * to help instrument app launch times, so that the app can report when it is 1460 * fully in a usable state; without this, all the system can determine is when 1461 * its window is first drawn and displayed. To participate in app launch time 1462 * measurement, you should always call this method after first launch (when 1463 * {@link #onCreate(android.os.Bundle)} is called) at the point where you have 1464 * entirely drawn your UI and populated with all of the significant data. You 1465 * can safely call this method any time after first launch as well, in which case 1466 * it will simply be ignored. 1467 */ 1468 public void reportFullyDrawn() { 1469 if (mDoReportFullyDrawn) { 1470 mDoReportFullyDrawn = false; 1471 try { 1472 ActivityManagerNative.getDefault().reportActivityFullyDrawn(mToken); 1473 } catch (RemoteException e) { 1474 } 1475 } 1476 } 1477 1478 /** 1479 * Called by the system when the device configuration changes while your 1480 * activity is running. Note that this will <em>only</em> be called if 1481 * you have selected configurations you would like to handle with the 1482 * {@link android.R.attr#configChanges} attribute in your manifest. If 1483 * any configuration change occurs that is not selected to be reported 1484 * by that attribute, then instead of reporting it the system will stop 1485 * and restart the activity (to have it launched with the new 1486 * configuration). 1487 * 1488 * <p>At the time that this function has been called, your Resources 1489 * object will have been updated to return resource values matching the 1490 * new configuration. 1491 * 1492 * @param newConfig The new device configuration. 1493 */ 1494 public void onConfigurationChanged(Configuration newConfig) { 1495 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig); 1496 mCalled = true; 1497 1498 mFragments.dispatchConfigurationChanged(newConfig); 1499 1500 if (mWindow != null) { 1501 // Pass the configuration changed event to the window 1502 mWindow.onConfigurationChanged(newConfig); 1503 } 1504 1505 if (mActionBar != null) { 1506 // Do this last; the action bar will need to access 1507 // view changes from above. 1508 mActionBar.onConfigurationChanged(newConfig); 1509 } 1510 } 1511 1512 /** 1513 * If this activity is being destroyed because it can not handle a 1514 * configuration parameter being changed (and thus its 1515 * {@link #onConfigurationChanged(Configuration)} method is 1516 * <em>not</em> being called), then you can use this method to discover 1517 * the set of changes that have occurred while in the process of being 1518 * destroyed. Note that there is no guarantee that these will be 1519 * accurate (other changes could have happened at any time), so you should 1520 * only use this as an optimization hint. 1521 * 1522 * @return Returns a bit field of the configuration parameters that are 1523 * changing, as defined by the {@link android.content.res.Configuration} 1524 * class. 1525 */ 1526 public int getChangingConfigurations() { 1527 return mConfigChangeFlags; 1528 } 1529 1530 /** 1531 * Retrieve the non-configuration instance data that was previously 1532 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1533 * be available from the initial {@link #onCreate} and 1534 * {@link #onStart} calls to the new instance, allowing you to extract 1535 * any useful dynamic state from the previous instance. 1536 * 1537 * <p>Note that the data you retrieve here should <em>only</em> be used 1538 * as an optimization for handling configuration changes. You should always 1539 * be able to handle getting a null pointer back, and an activity must 1540 * still be able to restore itself to its previous state (through the 1541 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1542 * function returns null. 1543 * 1544 * @return Returns the object previously returned by 1545 * {@link #onRetainNonConfigurationInstance()}. 1546 * 1547 * @deprecated Use the new {@link Fragment} API 1548 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1549 * available on older platforms through the Android compatibility package. 1550 */ 1551 @Deprecated 1552 public Object getLastNonConfigurationInstance() { 1553 return mLastNonConfigurationInstances != null 1554 ? mLastNonConfigurationInstances.activity : null; 1555 } 1556 1557 /** 1558 * Called by the system, as part of destroying an 1559 * activity due to a configuration change, when it is known that a new 1560 * instance will immediately be created for the new configuration. You 1561 * can return any object you like here, including the activity instance 1562 * itself, which can later be retrieved by calling 1563 * {@link #getLastNonConfigurationInstance()} in the new activity 1564 * instance. 1565 * 1566 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1567 * or later, consider instead using a {@link Fragment} with 1568 * {@link Fragment#setRetainInstance(boolean) 1569 * Fragment.setRetainInstance(boolean}.</em> 1570 * 1571 * <p>This function is called purely as an optimization, and you must 1572 * not rely on it being called. When it is called, a number of guarantees 1573 * will be made to help optimize configuration switching: 1574 * <ul> 1575 * <li> The function will be called between {@link #onStop} and 1576 * {@link #onDestroy}. 1577 * <li> A new instance of the activity will <em>always</em> be immediately 1578 * created after this one's {@link #onDestroy()} is called. In particular, 1579 * <em>no</em> messages will be dispatched during this time (when the returned 1580 * object does not have an activity to be associated with). 1581 * <li> The object you return here will <em>always</em> be available from 1582 * the {@link #getLastNonConfigurationInstance()} method of the following 1583 * activity instance as described there. 1584 * </ul> 1585 * 1586 * <p>These guarantees are designed so that an activity can use this API 1587 * to propagate extensive state from the old to new activity instance, from 1588 * loaded bitmaps, to network connections, to evenly actively running 1589 * threads. Note that you should <em>not</em> propagate any data that 1590 * may change based on the configuration, including any data loaded from 1591 * resources such as strings, layouts, or drawables. 1592 * 1593 * <p>The guarantee of no message handling during the switch to the next 1594 * activity simplifies use with active objects. For example if your retained 1595 * state is an {@link android.os.AsyncTask} you are guaranteed that its 1596 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 1597 * not be called from the call here until you execute the next instance's 1598 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 1599 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 1600 * running in a separate thread.) 1601 * 1602 * @return Return any Object holding the desired state to propagate to the 1603 * next activity instance. 1604 * 1605 * @deprecated Use the new {@link Fragment} API 1606 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1607 * available on older platforms through the Android compatibility package. 1608 */ 1609 public Object onRetainNonConfigurationInstance() { 1610 return null; 1611 } 1612 1613 /** 1614 * Retrieve the non-configuration instance data that was previously 1615 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1616 * be available from the initial {@link #onCreate} and 1617 * {@link #onStart} calls to the new instance, allowing you to extract 1618 * any useful dynamic state from the previous instance. 1619 * 1620 * <p>Note that the data you retrieve here should <em>only</em> be used 1621 * as an optimization for handling configuration changes. You should always 1622 * be able to handle getting a null pointer back, and an activity must 1623 * still be able to restore itself to its previous state (through the 1624 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1625 * function returns null. 1626 * 1627 * @return Returns the object previously returned by 1628 * {@link #onRetainNonConfigurationChildInstances()} 1629 */ 1630 HashMap<String, Object> getLastNonConfigurationChildInstances() { 1631 return mLastNonConfigurationInstances != null 1632 ? mLastNonConfigurationInstances.children : null; 1633 } 1634 1635 /** 1636 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1637 * it should return either a mapping from child activity id strings to arbitrary objects, 1638 * or null. This method is intended to be used by Activity framework subclasses that control a 1639 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1640 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1641 */ 1642 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1643 return null; 1644 } 1645 1646 NonConfigurationInstances retainNonConfigurationInstances() { 1647 Object activity = onRetainNonConfigurationInstance(); 1648 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 1649 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 1650 boolean retainLoaders = false; 1651 if (mAllLoaderManagers != null) { 1652 // prune out any loader managers that were already stopped and so 1653 // have nothing useful to retain. 1654 final int N = mAllLoaderManagers.size(); 1655 LoaderManagerImpl loaders[] = new LoaderManagerImpl[N]; 1656 for (int i=N-1; i>=0; i--) { 1657 loaders[i] = mAllLoaderManagers.valueAt(i); 1658 } 1659 for (int i=0; i<N; i++) { 1660 LoaderManagerImpl lm = loaders[i]; 1661 if (lm.mRetaining) { 1662 retainLoaders = true; 1663 } else { 1664 lm.doDestroy(); 1665 mAllLoaderManagers.remove(lm.mWho); 1666 } 1667 } 1668 } 1669 if (activity == null && children == null && fragments == null && !retainLoaders) { 1670 return null; 1671 } 1672 1673 NonConfigurationInstances nci = new NonConfigurationInstances(); 1674 nci.activity = activity; 1675 nci.children = children; 1676 nci.fragments = fragments; 1677 nci.loaders = mAllLoaderManagers; 1678 return nci; 1679 } 1680 1681 public void onLowMemory() { 1682 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onLowMemory " + this); 1683 mCalled = true; 1684 mFragments.dispatchLowMemory(); 1685 } 1686 1687 public void onTrimMemory(int level) { 1688 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onTrimMemory " + this + ": " + level); 1689 mCalled = true; 1690 mFragments.dispatchTrimMemory(level); 1691 } 1692 1693 /** 1694 * Return the FragmentManager for interacting with fragments associated 1695 * with this activity. 1696 */ 1697 public FragmentManager getFragmentManager() { 1698 return mFragments; 1699 } 1700 1701 void invalidateFragment(String who) { 1702 //Log.v(TAG, "invalidateFragmentIndex: index=" + index); 1703 if (mAllLoaderManagers != null) { 1704 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 1705 if (lm != null && !lm.mRetaining) { 1706 lm.doDestroy(); 1707 mAllLoaderManagers.remove(who); 1708 } 1709 } 1710 } 1711 1712 /** 1713 * Called when a Fragment is being attached to this activity, immediately 1714 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 1715 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 1716 */ 1717 public void onAttachFragment(Fragment fragment) { 1718 } 1719 1720 /** 1721 * Wrapper around 1722 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1723 * that gives the resulting {@link Cursor} to call 1724 * {@link #startManagingCursor} so that the activity will manage its 1725 * lifecycle for you. 1726 * 1727 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1728 * or later, consider instead using {@link LoaderManager} instead, available 1729 * via {@link #getLoaderManager()}.</em> 1730 * 1731 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1732 * this method, because the activity will do that for you at the appropriate time. However, if 1733 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1734 * not</em> automatically close the cursor and, in that case, you must call 1735 * {@link Cursor#close()}.</p> 1736 * 1737 * @param uri The URI of the content provider to query. 1738 * @param projection List of columns to return. 1739 * @param selection SQL WHERE clause. 1740 * @param sortOrder SQL ORDER BY clause. 1741 * 1742 * @return The Cursor that was returned by query(). 1743 * 1744 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1745 * @see #startManagingCursor 1746 * @hide 1747 * 1748 * @deprecated Use {@link CursorLoader} instead. 1749 */ 1750 @Deprecated 1751 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1752 String sortOrder) { 1753 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1754 if (c != null) { 1755 startManagingCursor(c); 1756 } 1757 return c; 1758 } 1759 1760 /** 1761 * Wrapper around 1762 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1763 * that gives the resulting {@link Cursor} to call 1764 * {@link #startManagingCursor} so that the activity will manage its 1765 * lifecycle for you. 1766 * 1767 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1768 * or later, consider instead using {@link LoaderManager} instead, available 1769 * via {@link #getLoaderManager()}.</em> 1770 * 1771 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1772 * this method, because the activity will do that for you at the appropriate time. However, if 1773 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1774 * not</em> automatically close the cursor and, in that case, you must call 1775 * {@link Cursor#close()}.</p> 1776 * 1777 * @param uri The URI of the content provider to query. 1778 * @param projection List of columns to return. 1779 * @param selection SQL WHERE clause. 1780 * @param selectionArgs The arguments to selection, if any ?s are pesent 1781 * @param sortOrder SQL ORDER BY clause. 1782 * 1783 * @return The Cursor that was returned by query(). 1784 * 1785 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1786 * @see #startManagingCursor 1787 * 1788 * @deprecated Use {@link CursorLoader} instead. 1789 */ 1790 @Deprecated 1791 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1792 String[] selectionArgs, String sortOrder) { 1793 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1794 if (c != null) { 1795 startManagingCursor(c); 1796 } 1797 return c; 1798 } 1799 1800 /** 1801 * This method allows the activity to take care of managing the given 1802 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1803 * That is, when the activity is stopped it will automatically call 1804 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1805 * it will call {@link Cursor#requery} for you. When the activity is 1806 * destroyed, all managed Cursors will be closed automatically. 1807 * 1808 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1809 * or later, consider instead using {@link LoaderManager} instead, available 1810 * via {@link #getLoaderManager()}.</em> 1811 * 1812 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 1813 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 1814 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 1815 * <em>will not</em> automatically close the cursor and, in that case, you must call 1816 * {@link Cursor#close()}.</p> 1817 * 1818 * @param c The Cursor to be managed. 1819 * 1820 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1821 * @see #stopManagingCursor 1822 * 1823 * @deprecated Use the new {@link android.content.CursorLoader} class with 1824 * {@link LoaderManager} instead; this is also 1825 * available on older platforms through the Android compatibility package. 1826 */ 1827 @Deprecated 1828 public void startManagingCursor(Cursor c) { 1829 synchronized (mManagedCursors) { 1830 mManagedCursors.add(new ManagedCursor(c)); 1831 } 1832 } 1833 1834 /** 1835 * Given a Cursor that was previously given to 1836 * {@link #startManagingCursor}, stop the activity's management of that 1837 * cursor. 1838 * 1839 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 1840 * the system <em>will not</em> automatically close the cursor and you must call 1841 * {@link Cursor#close()}.</p> 1842 * 1843 * @param c The Cursor that was being managed. 1844 * 1845 * @see #startManagingCursor 1846 * 1847 * @deprecated Use the new {@link android.content.CursorLoader} class with 1848 * {@link LoaderManager} instead; this is also 1849 * available on older platforms through the Android compatibility package. 1850 */ 1851 @Deprecated 1852 public void stopManagingCursor(Cursor c) { 1853 synchronized (mManagedCursors) { 1854 final int N = mManagedCursors.size(); 1855 for (int i=0; i<N; i++) { 1856 ManagedCursor mc = mManagedCursors.get(i); 1857 if (mc.mCursor == c) { 1858 mManagedCursors.remove(i); 1859 break; 1860 } 1861 } 1862 } 1863 } 1864 1865 /** 1866 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 1867 * this is a no-op. 1868 * @hide 1869 */ 1870 @Deprecated 1871 public void setPersistent(boolean isPersistent) { 1872 } 1873 1874 /** 1875 * Finds a view that was identified by the id attribute from the XML that 1876 * was processed in {@link #onCreate}. 1877 * 1878 * @return The view if found or null otherwise. 1879 */ 1880 public View findViewById(int id) { 1881 return getWindow().findViewById(id); 1882 } 1883 1884 /** 1885 * Retrieve a reference to this activity's ActionBar. 1886 * 1887 * @return The Activity's ActionBar, or null if it does not have one. 1888 */ 1889 public ActionBar getActionBar() { 1890 initActionBar(); 1891 return mActionBar; 1892 } 1893 1894 /** 1895 * Creates a new ActionBar, locates the inflated ActionBarView, 1896 * initializes the ActionBar with the view, and sets mActionBar. 1897 */ 1898 private void initActionBar() { 1899 Window window = getWindow(); 1900 1901 // Initializing the window decor can change window feature flags. 1902 // Make sure that we have the correct set before performing the test below. 1903 window.getDecorView(); 1904 1905 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 1906 return; 1907 } 1908 1909 mActionBar = new ActionBarImpl(this); 1910 mActionBar.setDefaultDisplayHomeAsUpEnabled(mEnableDefaultActionBarUp); 1911 1912 mWindow.setDefaultIcon(mActivityInfo.getIconResource()); 1913 mWindow.setDefaultLogo(mActivityInfo.getLogoResource()); 1914 } 1915 1916 /** 1917 * Set the activity content from a layout resource. The resource will be 1918 * inflated, adding all top-level views to the activity. 1919 * 1920 * @param layoutResID Resource ID to be inflated. 1921 * 1922 * @see #setContentView(android.view.View) 1923 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1924 */ 1925 public void setContentView(int layoutResID) { 1926 getWindow().setContentView(layoutResID); 1927 initActionBar(); 1928 } 1929 1930 /** 1931 * Set the activity content to an explicit view. This view is placed 1932 * directly into the activity's view hierarchy. It can itself be a complex 1933 * view hierarchy. When calling this method, the layout parameters of the 1934 * specified view are ignored. Both the width and the height of the view are 1935 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 1936 * your own layout parameters, invoke 1937 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 1938 * instead. 1939 * 1940 * @param view The desired content to display. 1941 * 1942 * @see #setContentView(int) 1943 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1944 */ 1945 public void setContentView(View view) { 1946 getWindow().setContentView(view); 1947 initActionBar(); 1948 } 1949 1950 /** 1951 * Set the activity content to an explicit view. This view is placed 1952 * directly into the activity's view hierarchy. It can itself be a complex 1953 * view hierarchy. 1954 * 1955 * @param view The desired content to display. 1956 * @param params Layout parameters for the view. 1957 * 1958 * @see #setContentView(android.view.View) 1959 * @see #setContentView(int) 1960 */ 1961 public void setContentView(View view, ViewGroup.LayoutParams params) { 1962 getWindow().setContentView(view, params); 1963 initActionBar(); 1964 } 1965 1966 /** 1967 * Add an additional content view to the activity. Added after any existing 1968 * ones in the activity -- existing views are NOT removed. 1969 * 1970 * @param view The desired content to display. 1971 * @param params Layout parameters for the view. 1972 */ 1973 public void addContentView(View view, ViewGroup.LayoutParams params) { 1974 getWindow().addContentView(view, params); 1975 initActionBar(); 1976 } 1977 1978 /** 1979 * Sets whether this activity is finished when touched outside its window's 1980 * bounds. 1981 */ 1982 public void setFinishOnTouchOutside(boolean finish) { 1983 mWindow.setCloseOnTouchOutside(finish); 1984 } 1985 1986 /** 1987 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1988 * keys. 1989 * 1990 * @see #setDefaultKeyMode 1991 */ 1992 static public final int DEFAULT_KEYS_DISABLE = 0; 1993 /** 1994 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1995 * key handling. 1996 * 1997 * @see #setDefaultKeyMode 1998 */ 1999 static public final int DEFAULT_KEYS_DIALER = 1; 2000 /** 2001 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 2002 * default key handling. 2003 * 2004 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 2005 * 2006 * @see #setDefaultKeyMode 2007 */ 2008 static public final int DEFAULT_KEYS_SHORTCUT = 2; 2009 /** 2010 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2011 * will start an application-defined search. (If the application or activity does not 2012 * actually define a search, the the keys will be ignored.) 2013 * 2014 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2015 * 2016 * @see #setDefaultKeyMode 2017 */ 2018 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 2019 2020 /** 2021 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 2022 * will start a global search (typically web search, but some platforms may define alternate 2023 * methods for global search) 2024 * 2025 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 2026 * 2027 * @see #setDefaultKeyMode 2028 */ 2029 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 2030 2031 /** 2032 * Select the default key handling for this activity. This controls what 2033 * will happen to key events that are not otherwise handled. The default 2034 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 2035 * floor. Other modes allow you to launch the dialer 2036 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 2037 * menu without requiring the menu key be held down 2038 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 2039 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 2040 * 2041 * <p>Note that the mode selected here does not impact the default 2042 * handling of system keys, such as the "back" and "menu" keys, and your 2043 * activity and its views always get a first chance to receive and handle 2044 * all application keys. 2045 * 2046 * @param mode The desired default key mode constant. 2047 * 2048 * @see #DEFAULT_KEYS_DISABLE 2049 * @see #DEFAULT_KEYS_DIALER 2050 * @see #DEFAULT_KEYS_SHORTCUT 2051 * @see #DEFAULT_KEYS_SEARCH_LOCAL 2052 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 2053 * @see #onKeyDown 2054 */ 2055 public final void setDefaultKeyMode(int mode) { 2056 mDefaultKeyMode = mode; 2057 2058 // Some modes use a SpannableStringBuilder to track & dispatch input events 2059 // This list must remain in sync with the switch in onKeyDown() 2060 switch (mode) { 2061 case DEFAULT_KEYS_DISABLE: 2062 case DEFAULT_KEYS_SHORTCUT: 2063 mDefaultKeySsb = null; // not used in these modes 2064 break; 2065 case DEFAULT_KEYS_DIALER: 2066 case DEFAULT_KEYS_SEARCH_LOCAL: 2067 case DEFAULT_KEYS_SEARCH_GLOBAL: 2068 mDefaultKeySsb = new SpannableStringBuilder(); 2069 Selection.setSelection(mDefaultKeySsb,0); 2070 break; 2071 default: 2072 throw new IllegalArgumentException(); 2073 } 2074 } 2075 2076 /** 2077 * Called when a key was pressed down and not handled by any of the views 2078 * inside of the activity. So, for example, key presses while the cursor 2079 * is inside a TextView will not trigger the event (unless it is a navigation 2080 * to another object) because TextView handles its own key presses. 2081 * 2082 * <p>If the focused view didn't want this event, this method is called. 2083 * 2084 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2085 * by calling {@link #onBackPressed()}, though the behavior varies based 2086 * on the application compatibility mode: for 2087 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2088 * it will set up the dispatch to call {@link #onKeyUp} where the action 2089 * will be performed; for earlier applications, it will perform the 2090 * action immediately in on-down, as those versions of the platform 2091 * behaved. 2092 * 2093 * <p>Other additional default key handling may be performed 2094 * if configured with {@link #setDefaultKeyMode}. 2095 * 2096 * @return Return <code>true</code> to prevent this event from being propagated 2097 * further, or <code>false</code> to indicate that you have not handled 2098 * this event and it should continue to be propagated. 2099 * @see #onKeyUp 2100 * @see android.view.KeyEvent 2101 */ 2102 public boolean onKeyDown(int keyCode, KeyEvent event) { 2103 if (keyCode == KeyEvent.KEYCODE_BACK) { 2104 if (getApplicationInfo().targetSdkVersion 2105 >= Build.VERSION_CODES.ECLAIR) { 2106 event.startTracking(); 2107 } else { 2108 onBackPressed(); 2109 } 2110 return true; 2111 } 2112 2113 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2114 return false; 2115 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2116 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 2117 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2118 return true; 2119 } 2120 return false; 2121 } else { 2122 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2123 boolean clearSpannable = false; 2124 boolean handled; 2125 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2126 clearSpannable = true; 2127 handled = false; 2128 } else { 2129 handled = TextKeyListener.getInstance().onKeyDown( 2130 null, mDefaultKeySsb, keyCode, event); 2131 if (handled && mDefaultKeySsb.length() > 0) { 2132 // something useable has been typed - dispatch it now. 2133 2134 final String str = mDefaultKeySsb.toString(); 2135 clearSpannable = true; 2136 2137 switch (mDefaultKeyMode) { 2138 case DEFAULT_KEYS_DIALER: 2139 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2140 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2141 startActivity(intent); 2142 break; 2143 case DEFAULT_KEYS_SEARCH_LOCAL: 2144 startSearch(str, false, null, false); 2145 break; 2146 case DEFAULT_KEYS_SEARCH_GLOBAL: 2147 startSearch(str, false, null, true); 2148 break; 2149 } 2150 } 2151 } 2152 if (clearSpannable) { 2153 mDefaultKeySsb.clear(); 2154 mDefaultKeySsb.clearSpans(); 2155 Selection.setSelection(mDefaultKeySsb,0); 2156 } 2157 return handled; 2158 } 2159 } 2160 2161 /** 2162 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2163 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2164 * the event). 2165 */ 2166 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2167 return false; 2168 } 2169 2170 /** 2171 * Called when a key was released and not handled by any of the views 2172 * inside of the activity. So, for example, key presses while the cursor 2173 * is inside a TextView will not trigger the event (unless it is a navigation 2174 * to another object) because TextView handles its own key presses. 2175 * 2176 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2177 * and go back. 2178 * 2179 * @return Return <code>true</code> to prevent this event from being propagated 2180 * further, or <code>false</code> to indicate that you have not handled 2181 * this event and it should continue to be propagated. 2182 * @see #onKeyDown 2183 * @see KeyEvent 2184 */ 2185 public boolean onKeyUp(int keyCode, KeyEvent event) { 2186 if (getApplicationInfo().targetSdkVersion 2187 >= Build.VERSION_CODES.ECLAIR) { 2188 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2189 && !event.isCanceled()) { 2190 onBackPressed(); 2191 return true; 2192 } 2193 } 2194 return false; 2195 } 2196 2197 /** 2198 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2199 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2200 * the event). 2201 */ 2202 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2203 return false; 2204 } 2205 2206 /** 2207 * Called when the activity has detected the user's press of the back 2208 * key. The default implementation simply finishes the current activity, 2209 * but you can override this to do whatever you want. 2210 */ 2211 public void onBackPressed() { 2212 if (!mFragments.popBackStackImmediate()) { 2213 finish(); 2214 } 2215 } 2216 2217 /** 2218 * Called when a key shortcut event is not handled by any of the views in the Activity. 2219 * Override this method to implement global key shortcuts for the Activity. 2220 * Key shortcuts can also be implemented by setting the 2221 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2222 * 2223 * @param keyCode The value in event.getKeyCode(). 2224 * @param event Description of the key event. 2225 * @return True if the key shortcut was handled. 2226 */ 2227 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2228 return false; 2229 } 2230 2231 /** 2232 * Called when a touch screen event was not handled by any of the views 2233 * under it. This is most useful to process touch events that happen 2234 * outside of your window bounds, where there is no view to receive it. 2235 * 2236 * @param event The touch screen event being processed. 2237 * 2238 * @return Return true if you have consumed the event, false if you haven't. 2239 * The default implementation always returns false. 2240 */ 2241 public boolean onTouchEvent(MotionEvent event) { 2242 if (mWindow.shouldCloseOnTouch(this, event)) { 2243 finish(); 2244 return true; 2245 } 2246 2247 return false; 2248 } 2249 2250 /** 2251 * Called when the trackball was moved and not handled by any of the 2252 * views inside of the activity. So, for example, if the trackball moves 2253 * while focus is on a button, you will receive a call here because 2254 * buttons do not normally do anything with trackball events. The call 2255 * here happens <em>before</em> trackball movements are converted to 2256 * DPAD key events, which then get sent back to the view hierarchy, and 2257 * will be processed at the point for things like focus navigation. 2258 * 2259 * @param event The trackball event being processed. 2260 * 2261 * @return Return true if you have consumed the event, false if you haven't. 2262 * The default implementation always returns false. 2263 */ 2264 public boolean onTrackballEvent(MotionEvent event) { 2265 return false; 2266 } 2267 2268 /** 2269 * Called when a generic motion event was not handled by any of the 2270 * views inside of the activity. 2271 * <p> 2272 * Generic motion events describe joystick movements, mouse hovers, track pad 2273 * touches, scroll wheel movements and other input events. The 2274 * {@link MotionEvent#getSource() source} of the motion event specifies 2275 * the class of input that was received. Implementations of this method 2276 * must examine the bits in the source before processing the event. 2277 * The following code example shows how this is done. 2278 * </p><p> 2279 * Generic motion events with source class 2280 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2281 * are delivered to the view under the pointer. All other generic motion events are 2282 * delivered to the focused view. 2283 * </p><p> 2284 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2285 * handle this event. 2286 * </p> 2287 * 2288 * @param event The generic motion event being processed. 2289 * 2290 * @return Return true if you have consumed the event, false if you haven't. 2291 * The default implementation always returns false. 2292 */ 2293 public boolean onGenericMotionEvent(MotionEvent event) { 2294 return false; 2295 } 2296 2297 /** 2298 * Called whenever a key, touch, or trackball event is dispatched to the 2299 * activity. Implement this method if you wish to know that the user has 2300 * interacted with the device in some way while your activity is running. 2301 * This callback and {@link #onUserLeaveHint} are intended to help 2302 * activities manage status bar notifications intelligently; specifically, 2303 * for helping activities determine the proper time to cancel a notfication. 2304 * 2305 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2306 * be accompanied by calls to {@link #onUserInteraction}. This 2307 * ensures that your activity will be told of relevant user activity such 2308 * as pulling down the notification pane and touching an item there. 2309 * 2310 * <p>Note that this callback will be invoked for the touch down action 2311 * that begins a touch gesture, but may not be invoked for the touch-moved 2312 * and touch-up actions that follow. 2313 * 2314 * @see #onUserLeaveHint() 2315 */ 2316 public void onUserInteraction() { 2317 } 2318 2319 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2320 // Update window manager if: we have a view, that view is 2321 // attached to its parent (which will be a RootView), and 2322 // this activity is not embedded. 2323 if (mParent == null) { 2324 View decor = mDecor; 2325 if (decor != null && decor.getParent() != null) { 2326 getWindowManager().updateViewLayout(decor, params); 2327 } 2328 } 2329 } 2330 2331 public void onContentChanged() { 2332 } 2333 2334 /** 2335 * Called when the current {@link Window} of the activity gains or loses 2336 * focus. This is the best indicator of whether this activity is visible 2337 * to the user. The default implementation clears the key tracking 2338 * state, so should always be called. 2339 * 2340 * <p>Note that this provides information about global focus state, which 2341 * is managed independently of activity lifecycles. As such, while focus 2342 * changes will generally have some relation to lifecycle changes (an 2343 * activity that is stopped will not generally get window focus), you 2344 * should not rely on any particular order between the callbacks here and 2345 * those in the other lifecycle methods such as {@link #onResume}. 2346 * 2347 * <p>As a general rule, however, a resumed activity will have window 2348 * focus... unless it has displayed other dialogs or popups that take 2349 * input focus, in which case the activity itself will not have focus 2350 * when the other windows have it. Likewise, the system may display 2351 * system-level windows (such as the status bar notification panel or 2352 * a system alert) which will temporarily take window input focus without 2353 * pausing the foreground activity. 2354 * 2355 * @param hasFocus Whether the window of this activity has focus. 2356 * 2357 * @see #hasWindowFocus() 2358 * @see #onResume 2359 * @see View#onWindowFocusChanged(boolean) 2360 */ 2361 public void onWindowFocusChanged(boolean hasFocus) { 2362 } 2363 2364 /** 2365 * Called when the main window associated with the activity has been 2366 * attached to the window manager. 2367 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2368 * for more information. 2369 * @see View#onAttachedToWindow 2370 */ 2371 public void onAttachedToWindow() { 2372 } 2373 2374 /** 2375 * Called when the main window associated with the activity has been 2376 * detached from the window manager. 2377 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2378 * for more information. 2379 * @see View#onDetachedFromWindow 2380 */ 2381 public void onDetachedFromWindow() { 2382 } 2383 2384 /** 2385 * Returns true if this activity's <em>main</em> window currently has window focus. 2386 * Note that this is not the same as the view itself having focus. 2387 * 2388 * @return True if this activity's main window currently has window focus. 2389 * 2390 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2391 */ 2392 public boolean hasWindowFocus() { 2393 Window w = getWindow(); 2394 if (w != null) { 2395 View d = w.getDecorView(); 2396 if (d != null) { 2397 return d.hasWindowFocus(); 2398 } 2399 } 2400 return false; 2401 } 2402 2403 /** 2404 * Called to process key events. You can override this to intercept all 2405 * key events before they are dispatched to the window. Be sure to call 2406 * this implementation for key events that should be handled normally. 2407 * 2408 * @param event The key event. 2409 * 2410 * @return boolean Return true if this event was consumed. 2411 */ 2412 public boolean dispatchKeyEvent(KeyEvent event) { 2413 onUserInteraction(); 2414 Window win = getWindow(); 2415 if (win.superDispatchKeyEvent(event)) { 2416 return true; 2417 } 2418 View decor = mDecor; 2419 if (decor == null) decor = win.getDecorView(); 2420 return event.dispatch(this, decor != null 2421 ? decor.getKeyDispatcherState() : null, this); 2422 } 2423 2424 /** 2425 * Called to process a key shortcut event. 2426 * You can override this to intercept all key shortcut events before they are 2427 * dispatched to the window. Be sure to call this implementation for key shortcut 2428 * events that should be handled normally. 2429 * 2430 * @param event The key shortcut event. 2431 * @return True if this event was consumed. 2432 */ 2433 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 2434 onUserInteraction(); 2435 if (getWindow().superDispatchKeyShortcutEvent(event)) { 2436 return true; 2437 } 2438 return onKeyShortcut(event.getKeyCode(), event); 2439 } 2440 2441 /** 2442 * Called to process touch screen events. You can override this to 2443 * intercept all touch screen events before they are dispatched to the 2444 * window. Be sure to call this implementation for touch screen events 2445 * that should be handled normally. 2446 * 2447 * @param ev The touch screen event. 2448 * 2449 * @return boolean Return true if this event was consumed. 2450 */ 2451 public boolean dispatchTouchEvent(MotionEvent ev) { 2452 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2453 onUserInteraction(); 2454 } 2455 if (getWindow().superDispatchTouchEvent(ev)) { 2456 return true; 2457 } 2458 return onTouchEvent(ev); 2459 } 2460 2461 /** 2462 * Called to process trackball events. You can override this to 2463 * intercept all trackball events before they are dispatched to the 2464 * window. Be sure to call this implementation for trackball events 2465 * that should be handled normally. 2466 * 2467 * @param ev The trackball event. 2468 * 2469 * @return boolean Return true if this event was consumed. 2470 */ 2471 public boolean dispatchTrackballEvent(MotionEvent ev) { 2472 onUserInteraction(); 2473 if (getWindow().superDispatchTrackballEvent(ev)) { 2474 return true; 2475 } 2476 return onTrackballEvent(ev); 2477 } 2478 2479 /** 2480 * Called to process generic motion events. You can override this to 2481 * intercept all generic motion events before they are dispatched to the 2482 * window. Be sure to call this implementation for generic motion events 2483 * that should be handled normally. 2484 * 2485 * @param ev The generic motion event. 2486 * 2487 * @return boolean Return true if this event was consumed. 2488 */ 2489 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 2490 onUserInteraction(); 2491 if (getWindow().superDispatchGenericMotionEvent(ev)) { 2492 return true; 2493 } 2494 return onGenericMotionEvent(ev); 2495 } 2496 2497 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2498 event.setClassName(getClass().getName()); 2499 event.setPackageName(getPackageName()); 2500 2501 LayoutParams params = getWindow().getAttributes(); 2502 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2503 (params.height == LayoutParams.MATCH_PARENT); 2504 event.setFullScreen(isFullScreen); 2505 2506 CharSequence title = getTitle(); 2507 if (!TextUtils.isEmpty(title)) { 2508 event.getText().add(title); 2509 } 2510 2511 return true; 2512 } 2513 2514 /** 2515 * Default implementation of 2516 * {@link android.view.Window.Callback#onCreatePanelView} 2517 * for activities. This 2518 * simply returns null so that all panel sub-windows will have the default 2519 * menu behavior. 2520 */ 2521 public View onCreatePanelView(int featureId) { 2522 return null; 2523 } 2524 2525 /** 2526 * Default implementation of 2527 * {@link android.view.Window.Callback#onCreatePanelMenu} 2528 * for activities. This calls through to the new 2529 * {@link #onCreateOptionsMenu} method for the 2530 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2531 * so that subclasses of Activity don't need to deal with feature codes. 2532 */ 2533 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2534 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2535 boolean show = onCreateOptionsMenu(menu); 2536 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 2537 return show; 2538 } 2539 return false; 2540 } 2541 2542 /** 2543 * Default implementation of 2544 * {@link android.view.Window.Callback#onPreparePanel} 2545 * for activities. This 2546 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2547 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2548 * panel, so that subclasses of 2549 * Activity don't need to deal with feature codes. 2550 */ 2551 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2552 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2553 boolean goforit = onPrepareOptionsMenu(menu); 2554 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 2555 return goforit; 2556 } 2557 return true; 2558 } 2559 2560 /** 2561 * {@inheritDoc} 2562 * 2563 * @return The default implementation returns true. 2564 */ 2565 public boolean onMenuOpened(int featureId, Menu menu) { 2566 if (featureId == Window.FEATURE_ACTION_BAR) { 2567 initActionBar(); 2568 if (mActionBar != null) { 2569 mActionBar.dispatchMenuVisibilityChanged(true); 2570 } else { 2571 Log.e(TAG, "Tried to open action bar menu with no action bar"); 2572 } 2573 } 2574 return true; 2575 } 2576 2577 /** 2578 * Default implementation of 2579 * {@link android.view.Window.Callback#onMenuItemSelected} 2580 * for activities. This calls through to the new 2581 * {@link #onOptionsItemSelected} method for the 2582 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2583 * panel, so that subclasses of 2584 * Activity don't need to deal with feature codes. 2585 */ 2586 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2587 CharSequence titleCondensed = item.getTitleCondensed(); 2588 2589 switch (featureId) { 2590 case Window.FEATURE_OPTIONS_PANEL: 2591 // Put event logging here so it gets called even if subclass 2592 // doesn't call through to superclass's implmeentation of each 2593 // of these methods below 2594 if(titleCondensed != null) { 2595 EventLog.writeEvent(50000, 0, titleCondensed.toString()); 2596 } 2597 if (onOptionsItemSelected(item)) { 2598 return true; 2599 } 2600 if (mFragments.dispatchOptionsItemSelected(item)) { 2601 return true; 2602 } 2603 if (item.getItemId() == android.R.id.home && mActionBar != null && 2604 (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) { 2605 if (mParent == null) { 2606 return onNavigateUp(); 2607 } else { 2608 return mParent.onNavigateUpFromChild(this); 2609 } 2610 } 2611 return false; 2612 2613 case Window.FEATURE_CONTEXT_MENU: 2614 if(titleCondensed != null) { 2615 EventLog.writeEvent(50000, 1, titleCondensed.toString()); 2616 } 2617 if (onContextItemSelected(item)) { 2618 return true; 2619 } 2620 return mFragments.dispatchContextItemSelected(item); 2621 2622 default: 2623 return false; 2624 } 2625 } 2626 2627 /** 2628 * Default implementation of 2629 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2630 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2631 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2632 * so that subclasses of Activity don't need to deal with feature codes. 2633 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2634 * {@link #onContextMenuClosed(Menu)} will be called. 2635 */ 2636 public void onPanelClosed(int featureId, Menu menu) { 2637 switch (featureId) { 2638 case Window.FEATURE_OPTIONS_PANEL: 2639 mFragments.dispatchOptionsMenuClosed(menu); 2640 onOptionsMenuClosed(menu); 2641 break; 2642 2643 case Window.FEATURE_CONTEXT_MENU: 2644 onContextMenuClosed(menu); 2645 break; 2646 2647 case Window.FEATURE_ACTION_BAR: 2648 initActionBar(); 2649 mActionBar.dispatchMenuVisibilityChanged(false); 2650 break; 2651 } 2652 } 2653 2654 /** 2655 * Declare that the options menu has changed, so should be recreated. 2656 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 2657 * time it needs to be displayed. 2658 */ 2659 public void invalidateOptionsMenu() { 2660 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 2661 } 2662 2663 /** 2664 * Initialize the contents of the Activity's standard options menu. You 2665 * should place your menu items in to <var>menu</var>. 2666 * 2667 * <p>This is only called once, the first time the options menu is 2668 * displayed. To update the menu every time it is displayed, see 2669 * {@link #onPrepareOptionsMenu}. 2670 * 2671 * <p>The default implementation populates the menu with standard system 2672 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2673 * they will be correctly ordered with application-defined menu items. 2674 * Deriving classes should always call through to the base implementation. 2675 * 2676 * <p>You can safely hold on to <var>menu</var> (and any items created 2677 * from it), making modifications to it as desired, until the next 2678 * time onCreateOptionsMenu() is called. 2679 * 2680 * <p>When you add items to the menu, you can implement the Activity's 2681 * {@link #onOptionsItemSelected} method to handle them there. 2682 * 2683 * @param menu The options menu in which you place your items. 2684 * 2685 * @return You must return true for the menu to be displayed; 2686 * if you return false it will not be shown. 2687 * 2688 * @see #onPrepareOptionsMenu 2689 * @see #onOptionsItemSelected 2690 */ 2691 public boolean onCreateOptionsMenu(Menu menu) { 2692 if (mParent != null) { 2693 return mParent.onCreateOptionsMenu(menu); 2694 } 2695 return true; 2696 } 2697 2698 /** 2699 * Prepare the Screen's standard options menu to be displayed. This is 2700 * called right before the menu is shown, every time it is shown. You can 2701 * use this method to efficiently enable/disable items or otherwise 2702 * dynamically modify the contents. 2703 * 2704 * <p>The default implementation updates the system menu items based on the 2705 * activity's state. Deriving classes should always call through to the 2706 * base class implementation. 2707 * 2708 * @param menu The options menu as last shown or first initialized by 2709 * onCreateOptionsMenu(). 2710 * 2711 * @return You must return true for the menu to be displayed; 2712 * if you return false it will not be shown. 2713 * 2714 * @see #onCreateOptionsMenu 2715 */ 2716 public boolean onPrepareOptionsMenu(Menu menu) { 2717 if (mParent != null) { 2718 return mParent.onPrepareOptionsMenu(menu); 2719 } 2720 return true; 2721 } 2722 2723 /** 2724 * This hook is called whenever an item in your options menu is selected. 2725 * The default implementation simply returns false to have the normal 2726 * processing happen (calling the item's Runnable or sending a message to 2727 * its Handler as appropriate). You can use this method for any items 2728 * for which you would like to do processing without those other 2729 * facilities. 2730 * 2731 * <p>Derived classes should call through to the base class for it to 2732 * perform the default menu handling.</p> 2733 * 2734 * @param item The menu item that was selected. 2735 * 2736 * @return boolean Return false to allow normal menu processing to 2737 * proceed, true to consume it here. 2738 * 2739 * @see #onCreateOptionsMenu 2740 */ 2741 public boolean onOptionsItemSelected(MenuItem item) { 2742 if (mParent != null) { 2743 return mParent.onOptionsItemSelected(item); 2744 } 2745 return false; 2746 } 2747 2748 /** 2749 * This method is called whenever the user chooses to navigate Up within your application's 2750 * activity hierarchy from the action bar. 2751 * 2752 * <p>If the attribute {@link android.R.attr#parentActivityName parentActivityName} 2753 * was specified in the manifest for this activity or an activity-alias to it, 2754 * default Up navigation will be handled automatically. If any activity 2755 * along the parent chain requires extra Intent arguments, the Activity subclass 2756 * should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)} 2757 * to supply those arguments.</p> 2758 * 2759 * <p>See <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 2760 * from the developer guide and <a href="{@docRoot}design/patterns/navigation.html">Navigation</a> 2761 * from the design guide for more information about navigating within your app.</p> 2762 * 2763 * <p>See the {@link TaskStackBuilder} class and the Activity methods 2764 * {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and 2765 * {@link #navigateUpTo(Intent)} for help implementing custom Up navigation. 2766 * The AppNavigation sample application in the Android SDK is also available for reference.</p> 2767 * 2768 * @return true if Up navigation completed successfully and this Activity was finished, 2769 * false otherwise. 2770 */ 2771 public boolean onNavigateUp() { 2772 // Automatically handle hierarchical Up navigation if the proper 2773 // metadata is available. 2774 Intent upIntent = getParentActivityIntent(); 2775 if (upIntent != null) { 2776 if (mActivityInfo.taskAffinity == null) { 2777 // Activities with a null affinity are special; they really shouldn't 2778 // specify a parent activity intent in the first place. Just finish 2779 // the current activity and call it a day. 2780 finish(); 2781 } else if (shouldUpRecreateTask(upIntent)) { 2782 TaskStackBuilder b = TaskStackBuilder.create(this); 2783 onCreateNavigateUpTaskStack(b); 2784 onPrepareNavigateUpTaskStack(b); 2785 b.startActivities(); 2786 2787 // We can't finishAffinity if we have a result. 2788 // Fall back and simply finish the current activity instead. 2789 if (mResultCode != RESULT_CANCELED || mResultData != null) { 2790 // Tell the developer what's going on to avoid hair-pulling. 2791 Log.i(TAG, "onNavigateUp only finishing topmost activity to return a result"); 2792 finish(); 2793 } else { 2794 finishAffinity(); 2795 } 2796 } else { 2797 navigateUpTo(upIntent); 2798 } 2799 return true; 2800 } 2801 return false; 2802 } 2803 2804 /** 2805 * This is called when a child activity of this one attempts to navigate up. 2806 * The default implementation simply calls onNavigateUp() on this activity (the parent). 2807 * 2808 * @param child The activity making the call. 2809 */ 2810 public boolean onNavigateUpFromChild(Activity child) { 2811 return onNavigateUp(); 2812 } 2813 2814 /** 2815 * Define the synthetic task stack that will be generated during Up navigation from 2816 * a different task. 2817 * 2818 * <p>The default implementation of this method adds the parent chain of this activity 2819 * as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications 2820 * may choose to override this method to construct the desired task stack in a different 2821 * way.</p> 2822 * 2823 * <p>This method will be invoked by the default implementation of {@link #onNavigateUp()} 2824 * if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent 2825 * returned by {@link #getParentActivityIntent()}.</p> 2826 * 2827 * <p>Applications that wish to supply extra Intent parameters to the parent stack defined 2828 * by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}.</p> 2829 * 2830 * @param builder An empty TaskStackBuilder - the application should add intents representing 2831 * the desired task stack 2832 */ 2833 public void onCreateNavigateUpTaskStack(TaskStackBuilder builder) { 2834 builder.addParentStack(this); 2835 } 2836 2837 /** 2838 * Prepare the synthetic task stack that will be generated during Up navigation 2839 * from a different task. 2840 * 2841 * <p>This method receives the {@link TaskStackBuilder} with the constructed series of 2842 * Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}. 2843 * If any extra data should be added to these intents before launching the new task, 2844 * the application should override this method and add that data here.</p> 2845 * 2846 * @param builder A TaskStackBuilder that has been populated with Intents by 2847 * onCreateNavigateUpTaskStack. 2848 */ 2849 public void onPrepareNavigateUpTaskStack(TaskStackBuilder builder) { 2850 } 2851 2852 /** 2853 * This hook is called whenever the options menu is being closed (either by the user canceling 2854 * the menu with the back/menu button, or when an item is selected). 2855 * 2856 * @param menu The options menu as last shown or first initialized by 2857 * onCreateOptionsMenu(). 2858 */ 2859 public void onOptionsMenuClosed(Menu menu) { 2860 if (mParent != null) { 2861 mParent.onOptionsMenuClosed(menu); 2862 } 2863 } 2864 2865 /** 2866 * Programmatically opens the options menu. If the options menu is already 2867 * open, this method does nothing. 2868 */ 2869 public void openOptionsMenu() { 2870 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2871 } 2872 2873 /** 2874 * Progammatically closes the options menu. If the options menu is already 2875 * closed, this method does nothing. 2876 */ 2877 public void closeOptionsMenu() { 2878 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2879 } 2880 2881 /** 2882 * Called when a context menu for the {@code view} is about to be shown. 2883 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2884 * time the context menu is about to be shown and should be populated for 2885 * the view (or item inside the view for {@link AdapterView} subclasses, 2886 * this can be found in the {@code menuInfo})). 2887 * <p> 2888 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2889 * item has been selected. 2890 * <p> 2891 * It is not safe to hold onto the context menu after this method returns. 2892 * 2893 */ 2894 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2895 } 2896 2897 /** 2898 * Registers a context menu to be shown for the given view (multiple views 2899 * can show the context menu). This method will set the 2900 * {@link OnCreateContextMenuListener} on the view to this activity, so 2901 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2902 * called when it is time to show the context menu. 2903 * 2904 * @see #unregisterForContextMenu(View) 2905 * @param view The view that should show a context menu. 2906 */ 2907 public void registerForContextMenu(View view) { 2908 view.setOnCreateContextMenuListener(this); 2909 } 2910 2911 /** 2912 * Prevents a context menu to be shown for the given view. This method will remove the 2913 * {@link OnCreateContextMenuListener} on the view. 2914 * 2915 * @see #registerForContextMenu(View) 2916 * @param view The view that should stop showing a context menu. 2917 */ 2918 public void unregisterForContextMenu(View view) { 2919 view.setOnCreateContextMenuListener(null); 2920 } 2921 2922 /** 2923 * Programmatically opens the context menu for a particular {@code view}. 2924 * The {@code view} should have been added via 2925 * {@link #registerForContextMenu(View)}. 2926 * 2927 * @param view The view to show the context menu for. 2928 */ 2929 public void openContextMenu(View view) { 2930 view.showContextMenu(); 2931 } 2932 2933 /** 2934 * Programmatically closes the most recently opened context menu, if showing. 2935 */ 2936 public void closeContextMenu() { 2937 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2938 } 2939 2940 /** 2941 * This hook is called whenever an item in a context menu is selected. The 2942 * default implementation simply returns false to have the normal processing 2943 * happen (calling the item's Runnable or sending a message to its Handler 2944 * as appropriate). You can use this method for any items for which you 2945 * would like to do processing without those other facilities. 2946 * <p> 2947 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2948 * View that added this menu item. 2949 * <p> 2950 * Derived classes should call through to the base class for it to perform 2951 * the default menu handling. 2952 * 2953 * @param item The context menu item that was selected. 2954 * @return boolean Return false to allow normal context menu processing to 2955 * proceed, true to consume it here. 2956 */ 2957 public boolean onContextItemSelected(MenuItem item) { 2958 if (mParent != null) { 2959 return mParent.onContextItemSelected(item); 2960 } 2961 return false; 2962 } 2963 2964 /** 2965 * This hook is called whenever the context menu is being closed (either by 2966 * the user canceling the menu with the back/menu button, or when an item is 2967 * selected). 2968 * 2969 * @param menu The context menu that is being closed. 2970 */ 2971 public void onContextMenuClosed(Menu menu) { 2972 if (mParent != null) { 2973 mParent.onContextMenuClosed(menu); 2974 } 2975 } 2976 2977 /** 2978 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2979 */ 2980 @Deprecated 2981 protected Dialog onCreateDialog(int id) { 2982 return null; 2983 } 2984 2985 /** 2986 * Callback for creating dialogs that are managed (saved and restored) for you 2987 * by the activity. The default implementation calls through to 2988 * {@link #onCreateDialog(int)} for compatibility. 2989 * 2990 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2991 * or later, consider instead using a {@link DialogFragment} instead.</em> 2992 * 2993 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2994 * this method the first time, and hang onto it thereafter. Any dialog 2995 * that is created by this method will automatically be saved and restored 2996 * for you, including whether it is showing. 2997 * 2998 * <p>If you would like the activity to manage saving and restoring dialogs 2999 * for you, you should override this method and handle any ids that are 3000 * passed to {@link #showDialog}. 3001 * 3002 * <p>If you would like an opportunity to prepare your dialog before it is shown, 3003 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 3004 * 3005 * @param id The id of the dialog. 3006 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3007 * @return The dialog. If you return null, the dialog will not be created. 3008 * 3009 * @see #onPrepareDialog(int, Dialog, Bundle) 3010 * @see #showDialog(int, Bundle) 3011 * @see #dismissDialog(int) 3012 * @see #removeDialog(int) 3013 * 3014 * @deprecated Use the new {@link DialogFragment} class with 3015 * {@link FragmentManager} instead; this is also 3016 * available on older platforms through the Android compatibility package. 3017 */ 3018 @Deprecated 3019 protected Dialog onCreateDialog(int id, Bundle args) { 3020 return onCreateDialog(id); 3021 } 3022 3023 /** 3024 * @deprecated Old no-arguments version of 3025 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 3026 */ 3027 @Deprecated 3028 protected void onPrepareDialog(int id, Dialog dialog) { 3029 dialog.setOwnerActivity(this); 3030 } 3031 3032 /** 3033 * Provides an opportunity to prepare a managed dialog before it is being 3034 * shown. The default implementation calls through to 3035 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 3036 * 3037 * <p> 3038 * Override this if you need to update a managed dialog based on the state 3039 * of the application each time it is shown. For example, a time picker 3040 * dialog might want to be updated with the current time. You should call 3041 * through to the superclass's implementation. The default implementation 3042 * will set this Activity as the owner activity on the Dialog. 3043 * 3044 * @param id The id of the managed dialog. 3045 * @param dialog The dialog. 3046 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 3047 * @see #onCreateDialog(int, Bundle) 3048 * @see #showDialog(int) 3049 * @see #dismissDialog(int) 3050 * @see #removeDialog(int) 3051 * 3052 * @deprecated Use the new {@link DialogFragment} class with 3053 * {@link FragmentManager} instead; this is also 3054 * available on older platforms through the Android compatibility package. 3055 */ 3056 @Deprecated 3057 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 3058 onPrepareDialog(id, dialog); 3059 } 3060 3061 /** 3062 * Simple version of {@link #showDialog(int, Bundle)} that does not 3063 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 3064 * with null arguments. 3065 * 3066 * @deprecated Use the new {@link DialogFragment} class with 3067 * {@link FragmentManager} instead; this is also 3068 * available on older platforms through the Android compatibility package. 3069 */ 3070 @Deprecated 3071 public final void showDialog(int id) { 3072 showDialog(id, null); 3073 } 3074 3075 /** 3076 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 3077 * will be made with the same id the first time this is called for a given 3078 * id. From thereafter, the dialog will be automatically saved and restored. 3079 * 3080 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3081 * or later, consider instead using a {@link DialogFragment} instead.</em> 3082 * 3083 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 3084 * be made to provide an opportunity to do any timely preparation. 3085 * 3086 * @param id The id of the managed dialog. 3087 * @param args Arguments to pass through to the dialog. These will be saved 3088 * and restored for you. Note that if the dialog is already created, 3089 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 3090 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 3091 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 3092 * @return Returns true if the Dialog was created; false is returned if 3093 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 3094 * 3095 * @see Dialog 3096 * @see #onCreateDialog(int, Bundle) 3097 * @see #onPrepareDialog(int, Dialog, Bundle) 3098 * @see #dismissDialog(int) 3099 * @see #removeDialog(int) 3100 * 3101 * @deprecated Use the new {@link DialogFragment} class with 3102 * {@link FragmentManager} instead; this is also 3103 * available on older platforms through the Android compatibility package. 3104 */ 3105 @Deprecated 3106 public final boolean showDialog(int id, Bundle args) { 3107 if (mManagedDialogs == null) { 3108 mManagedDialogs = new SparseArray<ManagedDialog>(); 3109 } 3110 ManagedDialog md = mManagedDialogs.get(id); 3111 if (md == null) { 3112 md = new ManagedDialog(); 3113 md.mDialog = createDialog(id, null, args); 3114 if (md.mDialog == null) { 3115 return false; 3116 } 3117 mManagedDialogs.put(id, md); 3118 } 3119 3120 md.mArgs = args; 3121 onPrepareDialog(id, md.mDialog, args); 3122 md.mDialog.show(); 3123 return true; 3124 } 3125 3126 /** 3127 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 3128 * 3129 * @param id The id of the managed dialog. 3130 * 3131 * @throws IllegalArgumentException if the id was not previously shown via 3132 * {@link #showDialog(int)}. 3133 * 3134 * @see #onCreateDialog(int, Bundle) 3135 * @see #onPrepareDialog(int, Dialog, Bundle) 3136 * @see #showDialog(int) 3137 * @see #removeDialog(int) 3138 * 3139 * @deprecated Use the new {@link DialogFragment} class with 3140 * {@link FragmentManager} instead; this is also 3141 * available on older platforms through the Android compatibility package. 3142 */ 3143 @Deprecated 3144 public final void dismissDialog(int id) { 3145 if (mManagedDialogs == null) { 3146 throw missingDialog(id); 3147 } 3148 3149 final ManagedDialog md = mManagedDialogs.get(id); 3150 if (md == null) { 3151 throw missingDialog(id); 3152 } 3153 md.mDialog.dismiss(); 3154 } 3155 3156 /** 3157 * Creates an exception to throw if a user passed in a dialog id that is 3158 * unexpected. 3159 */ 3160 private IllegalArgumentException missingDialog(int id) { 3161 return new IllegalArgumentException("no dialog with id " + id + " was ever " 3162 + "shown via Activity#showDialog"); 3163 } 3164 3165 /** 3166 * Removes any internal references to a dialog managed by this Activity. 3167 * If the dialog is showing, it will dismiss it as part of the clean up. 3168 * 3169 * <p>This can be useful if you know that you will never show a dialog again and 3170 * want to avoid the overhead of saving and restoring it in the future. 3171 * 3172 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 3173 * will not throw an exception if you try to remove an ID that does not 3174 * currently have an associated dialog.</p> 3175 * 3176 * @param id The id of the managed dialog. 3177 * 3178 * @see #onCreateDialog(int, Bundle) 3179 * @see #onPrepareDialog(int, Dialog, Bundle) 3180 * @see #showDialog(int) 3181 * @see #dismissDialog(int) 3182 * 3183 * @deprecated Use the new {@link DialogFragment} class with 3184 * {@link FragmentManager} instead; this is also 3185 * available on older platforms through the Android compatibility package. 3186 */ 3187 @Deprecated 3188 public final void removeDialog(int id) { 3189 if (mManagedDialogs != null) { 3190 final ManagedDialog md = mManagedDialogs.get(id); 3191 if (md != null) { 3192 md.mDialog.dismiss(); 3193 mManagedDialogs.remove(id); 3194 } 3195 } 3196 } 3197 3198 /** 3199 * This hook is called when the user signals the desire to start a search. 3200 * 3201 * <p>You can use this function as a simple way to launch the search UI, in response to a 3202 * menu item, search button, or other widgets within your activity. Unless overidden, 3203 * calling this function is the same as calling 3204 * {@link #startSearch startSearch(null, false, null, false)}, which launches 3205 * search for the current activity as specified in its manifest, see {@link SearchManager}. 3206 * 3207 * <p>You can override this function to force global search, e.g. in response to a dedicated 3208 * search key, or to block search entirely (by simply returning false). 3209 * 3210 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 3211 * The default implementation always returns {@code true}. 3212 * 3213 * @see android.app.SearchManager 3214 */ 3215 public boolean onSearchRequested() { 3216 startSearch(null, false, null, false); 3217 return true; 3218 } 3219 3220 /** 3221 * This hook is called to launch the search UI. 3222 * 3223 * <p>It is typically called from onSearchRequested(), either directly from 3224 * Activity.onSearchRequested() or from an overridden version in any given 3225 * Activity. If your goal is simply to activate search, it is preferred to call 3226 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 3227 * is to inject specific data such as context data, it is preferred to <i>override</i> 3228 * onSearchRequested(), so that any callers to it will benefit from the override. 3229 * 3230 * @param initialQuery Any non-null non-empty string will be inserted as 3231 * pre-entered text in the search query box. 3232 * @param selectInitialQuery If true, the intial query will be preselected, which means that 3233 * any further typing will replace it. This is useful for cases where an entire pre-formed 3234 * query is being inserted. If false, the selection point will be placed at the end of the 3235 * inserted query. This is useful when the inserted query is text that the user entered, 3236 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 3237 * if initialQuery is a non-empty string.</i> 3238 * @param appSearchData An application can insert application-specific 3239 * context here, in order to improve quality or specificity of its own 3240 * searches. This data will be returned with SEARCH intent(s). Null if 3241 * no extra data is required. 3242 * @param globalSearch If false, this will only launch the search that has been specifically 3243 * defined by the application (which is usually defined as a local search). If no default 3244 * search is defined in the current application or activity, global search will be launched. 3245 * If true, this will always launch a platform-global (e.g. web-based) search instead. 3246 * 3247 * @see android.app.SearchManager 3248 * @see #onSearchRequested 3249 */ 3250 public void startSearch(String initialQuery, boolean selectInitialQuery, 3251 Bundle appSearchData, boolean globalSearch) { 3252 ensureSearchManager(); 3253 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 3254 appSearchData, globalSearch); 3255 } 3256 3257 /** 3258 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 3259 * the search dialog. Made available for testing purposes. 3260 * 3261 * @param query The query to trigger. If empty, the request will be ignored. 3262 * @param appSearchData An application can insert application-specific 3263 * context here, in order to improve quality or specificity of its own 3264 * searches. This data will be returned with SEARCH intent(s). Null if 3265 * no extra data is required. 3266 */ 3267 public void triggerSearch(String query, Bundle appSearchData) { 3268 ensureSearchManager(); 3269 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 3270 } 3271 3272 /** 3273 * Request that key events come to this activity. Use this if your 3274 * activity has no views with focus, but the activity still wants 3275 * a chance to process key events. 3276 * 3277 * @see android.view.Window#takeKeyEvents 3278 */ 3279 public void takeKeyEvents(boolean get) { 3280 getWindow().takeKeyEvents(get); 3281 } 3282 3283 /** 3284 * Enable extended window features. This is a convenience for calling 3285 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 3286 * 3287 * @param featureId The desired feature as defined in 3288 * {@link android.view.Window}. 3289 * @return Returns true if the requested feature is supported and now 3290 * enabled. 3291 * 3292 * @see android.view.Window#requestFeature 3293 */ 3294 public final boolean requestWindowFeature(int featureId) { 3295 return getWindow().requestFeature(featureId); 3296 } 3297 3298 /** 3299 * Convenience for calling 3300 * {@link android.view.Window#setFeatureDrawableResource}. 3301 */ 3302 public final void setFeatureDrawableResource(int featureId, int resId) { 3303 getWindow().setFeatureDrawableResource(featureId, resId); 3304 } 3305 3306 /** 3307 * Convenience for calling 3308 * {@link android.view.Window#setFeatureDrawableUri}. 3309 */ 3310 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3311 getWindow().setFeatureDrawableUri(featureId, uri); 3312 } 3313 3314 /** 3315 * Convenience for calling 3316 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3317 */ 3318 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3319 getWindow().setFeatureDrawable(featureId, drawable); 3320 } 3321 3322 /** 3323 * Convenience for calling 3324 * {@link android.view.Window#setFeatureDrawableAlpha}. 3325 */ 3326 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3327 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3328 } 3329 3330 /** 3331 * Convenience for calling 3332 * {@link android.view.Window#getLayoutInflater}. 3333 */ 3334 public LayoutInflater getLayoutInflater() { 3335 return getWindow().getLayoutInflater(); 3336 } 3337 3338 /** 3339 * Returns a {@link MenuInflater} with this context. 3340 */ 3341 public MenuInflater getMenuInflater() { 3342 // Make sure that action views can get an appropriate theme. 3343 if (mMenuInflater == null) { 3344 initActionBar(); 3345 if (mActionBar != null) { 3346 mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this); 3347 } else { 3348 mMenuInflater = new MenuInflater(this); 3349 } 3350 } 3351 return mMenuInflater; 3352 } 3353 3354 @Override 3355 protected void onApplyThemeResource(Resources.Theme theme, int resid, 3356 boolean first) { 3357 if (mParent == null) { 3358 super.onApplyThemeResource(theme, resid, first); 3359 } else { 3360 try { 3361 theme.setTo(mParent.getTheme()); 3362 } catch (Exception e) { 3363 // Empty 3364 } 3365 theme.applyStyle(resid, false); 3366 } 3367 } 3368 3369 /** 3370 * Same as calling {@link #startActivityForResult(Intent, int, Bundle)} 3371 * with no options. 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. 3376 * 3377 * @throws android.content.ActivityNotFoundException 3378 * 3379 * @see #startActivity 3380 */ 3381 public void startActivityForResult(Intent intent, int requestCode) { 3382 startActivityForResult(intent, requestCode, null); 3383 } 3384 3385 /** 3386 * Launch an activity for which you would like a result when it finished. 3387 * When this activity exits, your 3388 * onActivityResult() method will be called with the given requestCode. 3389 * Using a negative requestCode is the same as calling 3390 * {@link #startActivity} (the activity is not launched as a sub-activity). 3391 * 3392 * <p>Note that this method should only be used with Intent protocols 3393 * that are defined to return a result. In other protocols (such as 3394 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 3395 * not get the result when you expect. For example, if the activity you 3396 * are launching uses the singleTask launch mode, it will not run in your 3397 * task and thus you will immediately receive a cancel result. 3398 * 3399 * <p>As a special case, if you call startActivityForResult() with a requestCode 3400 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 3401 * activity, then your window will not be displayed until a result is 3402 * returned back from the started activity. This is to avoid visible 3403 * flickering when redirecting to another activity. 3404 * 3405 * <p>This method throws {@link android.content.ActivityNotFoundException} 3406 * if there was no Activity found to run the given Intent. 3407 * 3408 * @param intent The intent to start. 3409 * @param requestCode If >= 0, this code will be returned in 3410 * onActivityResult() when the activity exits. 3411 * @param options Additional options for how the Activity should be started. 3412 * See {@link android.content.Context#startActivity(Intent, Bundle) 3413 * Context.startActivity(Intent, Bundle)} for more details. 3414 * 3415 * @throws android.content.ActivityNotFoundException 3416 * 3417 * @see #startActivity 3418 */ 3419 public void startActivityForResult(Intent intent, int requestCode, Bundle options) { 3420 if (mParent == null) { 3421 Instrumentation.ActivityResult ar = 3422 mInstrumentation.execStartActivity( 3423 this, mMainThread.getApplicationThread(), mToken, this, 3424 intent, requestCode, options); 3425 if (ar != null) { 3426 mMainThread.sendActivityResult( 3427 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 3428 ar.getResultData()); 3429 } 3430 if (requestCode >= 0) { 3431 // If this start is requesting a result, we can avoid making 3432 // the activity visible until the result is received. Setting 3433 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3434 // activity hidden during this time, to avoid flickering. 3435 // This can only be done when a result is requested because 3436 // that guarantees we will get information back when the 3437 // activity is finished, no matter what happens to it. 3438 mStartedActivity = true; 3439 } 3440 3441 final View decor = mWindow != null ? mWindow.peekDecorView() : null; 3442 if (decor != null) { 3443 decor.cancelPendingInputEvents(); 3444 } 3445 // TODO Consider clearing/flushing other event sources and events for child windows. 3446 } else { 3447 if (options != null) { 3448 mParent.startActivityFromChild(this, intent, requestCode, options); 3449 } else { 3450 // Note we want to go through this method for compatibility with 3451 // existing applications that may have overridden it. 3452 mParent.startActivityFromChild(this, intent, requestCode); 3453 } 3454 } 3455 } 3456 3457 /** 3458 * @hide Implement to provide correct calling token. 3459 */ 3460 public void startActivityAsUser(Intent intent, UserHandle user) { 3461 startActivityAsUser(intent, null, user); 3462 } 3463 3464 /** 3465 * @hide Implement to provide correct calling token. 3466 */ 3467 public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) { 3468 if (mParent != null) { 3469 throw new RuntimeException("Called be called from a child"); 3470 } 3471 Instrumentation.ActivityResult ar = 3472 mInstrumentation.execStartActivity( 3473 this, mMainThread.getApplicationThread(), mToken, this, 3474 intent, -1, options, user); 3475 if (ar != null) { 3476 mMainThread.sendActivityResult( 3477 mToken, mEmbeddedID, -1, ar.getResultCode(), 3478 ar.getResultData()); 3479 } 3480 } 3481 3482 /** 3483 * Same as calling {@link #startIntentSenderForResult(IntentSender, int, 3484 * Intent, int, int, int, Bundle)} with no options. 3485 * 3486 * @param intent The IntentSender to launch. 3487 * @param requestCode If >= 0, this code will be returned in 3488 * onActivityResult() when the activity exits. 3489 * @param fillInIntent If non-null, this will be provided as the 3490 * intent parameter to {@link IntentSender#sendIntent}. 3491 * @param flagsMask Intent flags in the original IntentSender that you 3492 * would like to change. 3493 * @param flagsValues Desired values for any bits set in 3494 * <var>flagsMask</var> 3495 * @param extraFlags Always set to 0. 3496 */ 3497 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3498 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3499 throws IntentSender.SendIntentException { 3500 startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, 3501 flagsValues, extraFlags, null); 3502 } 3503 3504 /** 3505 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 3506 * to use a IntentSender to describe the activity to be started. If 3507 * the IntentSender is for an activity, that activity will be started 3508 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 3509 * here; otherwise, its associated action will be executed (such as 3510 * sending a broadcast) as if you had called 3511 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 3512 * 3513 * @param intent The IntentSender to launch. 3514 * @param requestCode If >= 0, this code will be returned in 3515 * onActivityResult() when the activity exits. 3516 * @param fillInIntent If non-null, this will be provided as the 3517 * intent parameter to {@link IntentSender#sendIntent}. 3518 * @param flagsMask Intent flags in the original IntentSender that you 3519 * would like to change. 3520 * @param flagsValues Desired values for any bits set in 3521 * <var>flagsMask</var> 3522 * @param extraFlags Always set to 0. 3523 * @param options Additional options for how the Activity should be started. 3524 * See {@link android.content.Context#startActivity(Intent, Bundle) 3525 * Context.startActivity(Intent, Bundle)} for more details. If options 3526 * have also been supplied by the IntentSender, options given here will 3527 * override any that conflict with those given by the IntentSender. 3528 */ 3529 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3530 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 3531 Bundle options) throws IntentSender.SendIntentException { 3532 if (mParent == null) { 3533 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3534 flagsMask, flagsValues, this, options); 3535 } else if (options != null) { 3536 mParent.startIntentSenderFromChild(this, intent, requestCode, 3537 fillInIntent, flagsMask, flagsValues, extraFlags, options); 3538 } else { 3539 // Note we want to go through this call for compatibility with 3540 // existing applications that may have overridden the method. 3541 mParent.startIntentSenderFromChild(this, intent, requestCode, 3542 fillInIntent, flagsMask, flagsValues, extraFlags); 3543 } 3544 } 3545 3546 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 3547 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity, 3548 Bundle options) 3549 throws IntentSender.SendIntentException { 3550 try { 3551 String resolvedType = null; 3552 if (fillInIntent != null) { 3553 fillInIntent.migrateExtraStreamToClipData(); 3554 fillInIntent.prepareToLeaveProcess(); 3555 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 3556 } 3557 int result = ActivityManagerNative.getDefault() 3558 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 3559 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 3560 requestCode, flagsMask, flagsValues, options); 3561 if (result == ActivityManager.START_CANCELED) { 3562 throw new IntentSender.SendIntentException(); 3563 } 3564 Instrumentation.checkStartActivityResult(result, null); 3565 } catch (RemoteException e) { 3566 } 3567 if (requestCode >= 0) { 3568 // If this start is requesting a result, we can avoid making 3569 // the activity visible until the result is received. Setting 3570 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3571 // activity hidden during this time, to avoid flickering. 3572 // This can only be done when a result is requested because 3573 // that guarantees we will get information back when the 3574 // activity is finished, no matter what happens to it. 3575 mStartedActivity = true; 3576 } 3577 } 3578 3579 /** 3580 * Same as {@link #startActivity(Intent, Bundle)} with no options 3581 * specified. 3582 * 3583 * @param intent The intent to start. 3584 * 3585 * @throws android.content.ActivityNotFoundException 3586 * 3587 * @see {@link #startActivity(Intent, Bundle)} 3588 * @see #startActivityForResult 3589 */ 3590 @Override 3591 public void startActivity(Intent intent) { 3592 startActivity(intent, null); 3593 } 3594 3595 /** 3596 * Launch a new activity. You will not receive any information about when 3597 * the activity exits. This implementation overrides the base version, 3598 * providing information about 3599 * the activity performing the launch. Because of this additional 3600 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3601 * required; if not specified, the new activity will be added to the 3602 * task of the caller. 3603 * 3604 * <p>This method throws {@link android.content.ActivityNotFoundException} 3605 * if there was no Activity found to run the given Intent. 3606 * 3607 * @param intent The intent to start. 3608 * @param options Additional options for how the Activity should be started. 3609 * See {@link android.content.Context#startActivity(Intent, Bundle) 3610 * Context.startActivity(Intent, Bundle)} for more details. 3611 * 3612 * @throws android.content.ActivityNotFoundException 3613 * 3614 * @see {@link #startActivity(Intent)} 3615 * @see #startActivityForResult 3616 */ 3617 @Override 3618 public void startActivity(Intent intent, Bundle options) { 3619 if (options != null) { 3620 startActivityForResult(intent, -1, options); 3621 } else { 3622 // Note we want to go through this call for compatibility with 3623 // applications that may have overridden the method. 3624 startActivityForResult(intent, -1); 3625 } 3626 } 3627 3628 /** 3629 * Same as {@link #startActivities(Intent[], Bundle)} with no options 3630 * specified. 3631 * 3632 * @param intents The intents to start. 3633 * 3634 * @throws android.content.ActivityNotFoundException 3635 * 3636 * @see {@link #startActivities(Intent[], Bundle)} 3637 * @see #startActivityForResult 3638 */ 3639 @Override 3640 public void startActivities(Intent[] intents) { 3641 startActivities(intents, null); 3642 } 3643 3644 /** 3645 * Launch a new activity. You will not receive any information about when 3646 * the activity exits. This implementation overrides the base version, 3647 * providing information about 3648 * the activity performing the launch. Because of this additional 3649 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3650 * required; if not specified, the new activity will be added to the 3651 * task of the caller. 3652 * 3653 * <p>This method throws {@link android.content.ActivityNotFoundException} 3654 * if there was no Activity found to run the given Intent. 3655 * 3656 * @param intents The intents to start. 3657 * @param options Additional options for how the Activity should be started. 3658 * See {@link android.content.Context#startActivity(Intent, Bundle) 3659 * Context.startActivity(Intent, Bundle)} for more details. 3660 * 3661 * @throws android.content.ActivityNotFoundException 3662 * 3663 * @see {@link #startActivities(Intent[])} 3664 * @see #startActivityForResult 3665 */ 3666 @Override 3667 public void startActivities(Intent[] intents, Bundle options) { 3668 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 3669 mToken, this, intents, options); 3670 } 3671 3672 /** 3673 * Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 3674 * with no options. 3675 * 3676 * @param intent The IntentSender to launch. 3677 * @param fillInIntent If non-null, this will be provided as the 3678 * intent parameter to {@link IntentSender#sendIntent}. 3679 * @param flagsMask Intent flags in the original IntentSender that you 3680 * would like to change. 3681 * @param flagsValues Desired values for any bits set in 3682 * <var>flagsMask</var> 3683 * @param extraFlags Always set to 0. 3684 */ 3685 public void startIntentSender(IntentSender intent, 3686 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3687 throws IntentSender.SendIntentException { 3688 startIntentSender(intent, fillInIntent, flagsMask, flagsValues, 3689 extraFlags, null); 3690 } 3691 3692 /** 3693 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 3694 * to start; see 3695 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)} 3696 * for more information. 3697 * 3698 * @param intent The IntentSender to launch. 3699 * @param fillInIntent If non-null, this will be provided as the 3700 * intent parameter to {@link IntentSender#sendIntent}. 3701 * @param flagsMask Intent flags in the original IntentSender that you 3702 * would like to change. 3703 * @param flagsValues Desired values for any bits set in 3704 * <var>flagsMask</var> 3705 * @param extraFlags Always set to 0. 3706 * @param options Additional options for how the Activity should be started. 3707 * See {@link android.content.Context#startActivity(Intent, Bundle) 3708 * Context.startActivity(Intent, Bundle)} for more details. If options 3709 * have also been supplied by the IntentSender, options given here will 3710 * override any that conflict with those given by the IntentSender. 3711 */ 3712 public void startIntentSender(IntentSender intent, 3713 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 3714 Bundle options) throws IntentSender.SendIntentException { 3715 if (options != null) { 3716 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3717 flagsValues, extraFlags, options); 3718 } else { 3719 // Note we want to go through this call for compatibility with 3720 // applications that may have overridden the method. 3721 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3722 flagsValues, extraFlags); 3723 } 3724 } 3725 3726 /** 3727 * Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)} 3728 * with no options. 3729 * 3730 * @param intent The intent to start. 3731 * @param requestCode If >= 0, this code will be returned in 3732 * onActivityResult() when the activity exits, as described in 3733 * {@link #startActivityForResult}. 3734 * 3735 * @return If a new activity was launched then true is returned; otherwise 3736 * false is returned and you must handle the Intent yourself. 3737 * 3738 * @see #startActivity 3739 * @see #startActivityForResult 3740 */ 3741 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 3742 return startActivityIfNeeded(intent, requestCode, null); 3743 } 3744 3745 /** 3746 * A special variation to launch an activity only if a new activity 3747 * instance is needed to handle the given Intent. In other words, this is 3748 * just like {@link #startActivityForResult(Intent, int)} except: if you are 3749 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 3750 * singleTask or singleTop 3751 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 3752 * and the activity 3753 * that handles <var>intent</var> is the same as your currently running 3754 * activity, then a new instance is not needed. In this case, instead of 3755 * the normal behavior of calling {@link #onNewIntent} this function will 3756 * return and you can handle the Intent yourself. 3757 * 3758 * <p>This function can only be called from a top-level activity; if it is 3759 * called from a child activity, a runtime exception will be thrown. 3760 * 3761 * @param intent The intent to start. 3762 * @param requestCode If >= 0, this code will be returned in 3763 * onActivityResult() when the activity exits, as described in 3764 * {@link #startActivityForResult}. 3765 * @param options Additional options for how the Activity should be started. 3766 * See {@link android.content.Context#startActivity(Intent, Bundle) 3767 * Context.startActivity(Intent, Bundle)} for more details. 3768 * 3769 * @return If a new activity was launched then true is returned; otherwise 3770 * false is returned and you must handle the Intent yourself. 3771 * 3772 * @see #startActivity 3773 * @see #startActivityForResult 3774 */ 3775 public boolean startActivityIfNeeded(Intent intent, int requestCode, Bundle options) { 3776 if (mParent == null) { 3777 int result = ActivityManager.START_RETURN_INTENT_TO_CALLER; 3778 try { 3779 intent.migrateExtraStreamToClipData(); 3780 intent.prepareToLeaveProcess(); 3781 result = ActivityManagerNative.getDefault() 3782 .startActivity(mMainThread.getApplicationThread(), getBasePackageName(), 3783 intent, intent.resolveTypeIfNeeded(getContentResolver()), 3784 mToken, mEmbeddedID, requestCode, 3785 ActivityManager.START_FLAG_ONLY_IF_NEEDED, null, null, 3786 options); 3787 } catch (RemoteException e) { 3788 // Empty 3789 } 3790 3791 Instrumentation.checkStartActivityResult(result, intent); 3792 3793 if (requestCode >= 0) { 3794 // If this start is requesting a result, we can avoid making 3795 // the activity visible until the result is received. Setting 3796 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3797 // activity hidden during this time, to avoid flickering. 3798 // This can only be done when a result is requested because 3799 // that guarantees we will get information back when the 3800 // activity is finished, no matter what happens to it. 3801 mStartedActivity = true; 3802 } 3803 return result != ActivityManager.START_RETURN_INTENT_TO_CALLER; 3804 } 3805 3806 throw new UnsupportedOperationException( 3807 "startActivityIfNeeded can only be called from a top-level activity"); 3808 } 3809 3810 /** 3811 * Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with 3812 * no options. 3813 * 3814 * @param intent The intent to dispatch to the next activity. For 3815 * correct behavior, this must be the same as the Intent that started 3816 * your own activity; the only changes you can make are to the extras 3817 * inside of it. 3818 * 3819 * @return Returns a boolean indicating whether there was another Activity 3820 * to start: true if there was a next activity to start, false if there 3821 * wasn't. In general, if true is returned you will then want to call 3822 * finish() on yourself. 3823 */ 3824 public boolean startNextMatchingActivity(Intent intent) { 3825 return startNextMatchingActivity(intent, null); 3826 } 3827 3828 /** 3829 * Special version of starting an activity, for use when you are replacing 3830 * other activity components. You can use this to hand the Intent off 3831 * to the next Activity that can handle it. You typically call this in 3832 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3833 * 3834 * @param intent The intent to dispatch to the next activity. For 3835 * correct behavior, this must be the same as the Intent that started 3836 * your own activity; the only changes you can make are to the extras 3837 * inside of it. 3838 * @param options Additional options for how the Activity should be started. 3839 * See {@link android.content.Context#startActivity(Intent, Bundle) 3840 * Context.startActivity(Intent, Bundle)} for more details. 3841 * 3842 * @return Returns a boolean indicating whether there was another Activity 3843 * to start: true if there was a next activity to start, false if there 3844 * wasn't. In general, if true is returned you will then want to call 3845 * finish() on yourself. 3846 */ 3847 public boolean startNextMatchingActivity(Intent intent, Bundle options) { 3848 if (mParent == null) { 3849 try { 3850 intent.migrateExtraStreamToClipData(); 3851 intent.prepareToLeaveProcess(); 3852 return ActivityManagerNative.getDefault() 3853 .startNextMatchingActivity(mToken, intent, options); 3854 } catch (RemoteException e) { 3855 // Empty 3856 } 3857 return false; 3858 } 3859 3860 throw new UnsupportedOperationException( 3861 "startNextMatchingActivity can only be called from a top-level activity"); 3862 } 3863 3864 /** 3865 * Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)} 3866 * with no options. 3867 * 3868 * @param child The activity making the call. 3869 * @param intent The intent to start. 3870 * @param requestCode Reply request code. < 0 if reply is not requested. 3871 * 3872 * @throws android.content.ActivityNotFoundException 3873 * 3874 * @see #startActivity 3875 * @see #startActivityForResult 3876 */ 3877 public void startActivityFromChild(Activity child, Intent intent, 3878 int requestCode) { 3879 startActivityFromChild(child, intent, requestCode, null); 3880 } 3881 3882 /** 3883 * This is called when a child activity of this one calls its 3884 * {@link #startActivity} or {@link #startActivityForResult} method. 3885 * 3886 * <p>This method throws {@link android.content.ActivityNotFoundException} 3887 * if there was no Activity found to run the given Intent. 3888 * 3889 * @param child The activity making the call. 3890 * @param intent The intent to start. 3891 * @param requestCode Reply request code. < 0 if reply is not requested. 3892 * @param options Additional options for how the Activity should be started. 3893 * See {@link android.content.Context#startActivity(Intent, Bundle) 3894 * Context.startActivity(Intent, Bundle)} for more details. 3895 * 3896 * @throws android.content.ActivityNotFoundException 3897 * 3898 * @see #startActivity 3899 * @see #startActivityForResult 3900 */ 3901 public void startActivityFromChild(Activity child, Intent intent, 3902 int requestCode, Bundle options) { 3903 Instrumentation.ActivityResult ar = 3904 mInstrumentation.execStartActivity( 3905 this, mMainThread.getApplicationThread(), mToken, child, 3906 intent, requestCode, options); 3907 if (ar != null) { 3908 mMainThread.sendActivityResult( 3909 mToken, child.mEmbeddedID, requestCode, 3910 ar.getResultCode(), ar.getResultData()); 3911 } 3912 } 3913 3914 /** 3915 * Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)} 3916 * with no options. 3917 * 3918 * @param fragment The fragment making the call. 3919 * @param intent The intent to start. 3920 * @param requestCode Reply request code. < 0 if reply is not requested. 3921 * 3922 * @throws android.content.ActivityNotFoundException 3923 * 3924 * @see Fragment#startActivity 3925 * @see Fragment#startActivityForResult 3926 */ 3927 public void startActivityFromFragment(Fragment fragment, Intent intent, 3928 int requestCode) { 3929 startActivityFromFragment(fragment, intent, requestCode, null); 3930 } 3931 3932 /** 3933 * This is called when a Fragment in this activity calls its 3934 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 3935 * method. 3936 * 3937 * <p>This method throws {@link android.content.ActivityNotFoundException} 3938 * if there was no Activity found to run the given Intent. 3939 * 3940 * @param fragment The fragment making the call. 3941 * @param intent The intent to start. 3942 * @param requestCode Reply request code. < 0 if reply is not requested. 3943 * @param options Additional options for how the Activity should be started. 3944 * See {@link android.content.Context#startActivity(Intent, Bundle) 3945 * Context.startActivity(Intent, Bundle)} for more details. 3946 * 3947 * @throws android.content.ActivityNotFoundException 3948 * 3949 * @see Fragment#startActivity 3950 * @see Fragment#startActivityForResult 3951 */ 3952 public void startActivityFromFragment(Fragment fragment, Intent intent, 3953 int requestCode, Bundle options) { 3954 Instrumentation.ActivityResult ar = 3955 mInstrumentation.execStartActivity( 3956 this, mMainThread.getApplicationThread(), mToken, fragment, 3957 intent, requestCode, options); 3958 if (ar != null) { 3959 mMainThread.sendActivityResult( 3960 mToken, fragment.mWho, requestCode, 3961 ar.getResultCode(), ar.getResultData()); 3962 } 3963 } 3964 3965 /** 3966 * Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender, 3967 * int, Intent, int, int, int, Bundle)} with no options. 3968 */ 3969 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3970 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3971 int extraFlags) 3972 throws IntentSender.SendIntentException { 3973 startIntentSenderFromChild(child, intent, requestCode, fillInIntent, 3974 flagsMask, flagsValues, extraFlags, null); 3975 } 3976 3977 /** 3978 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3979 * taking a IntentSender; see 3980 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3981 * for more information. 3982 */ 3983 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3984 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3985 int extraFlags, Bundle options) 3986 throws IntentSender.SendIntentException { 3987 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3988 flagsMask, flagsValues, child, options); 3989 } 3990 3991 /** 3992 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3993 * or {@link #finish} to specify an explicit transition animation to 3994 * perform next. 3995 * 3996 * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative 3997 * to using this with starting activities is to supply the desired animation 3998 * information through a {@link ActivityOptions} bundle to 3999 * {@link #startActivity(Intent, Bundle) or a related function. This allows 4000 * you to specify a custom animation even when starting an activity from 4001 * outside the context of the current top activity. 4002 * 4003 * @param enterAnim A resource ID of the animation resource to use for 4004 * the incoming activity. Use 0 for no animation. 4005 * @param exitAnim A resource ID of the animation resource to use for 4006 * the outgoing activity. Use 0 for no animation. 4007 */ 4008 public void overridePendingTransition(int enterAnim, int exitAnim) { 4009 try { 4010 ActivityManagerNative.getDefault().overridePendingTransition( 4011 mToken, getPackageName(), enterAnim, exitAnim); 4012 } catch (RemoteException e) { 4013 } 4014 } 4015 4016 /** 4017 * Call this to set the result that your activity will return to its 4018 * caller. 4019 * 4020 * @param resultCode The result code to propagate back to the originating 4021 * activity, often RESULT_CANCELED or RESULT_OK 4022 * 4023 * @see #RESULT_CANCELED 4024 * @see #RESULT_OK 4025 * @see #RESULT_FIRST_USER 4026 * @see #setResult(int, Intent) 4027 */ 4028 public final void setResult(int resultCode) { 4029 synchronized (this) { 4030 mResultCode = resultCode; 4031 mResultData = null; 4032 } 4033 } 4034 4035 /** 4036 * Call this to set the result that your activity will return to its 4037 * caller. 4038 * 4039 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 4040 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 4041 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 4042 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 4043 * Activity receiving the result access to the specific URIs in the Intent. 4044 * Access will remain until the Activity has finished (it will remain across the hosting 4045 * process being killed and other temporary destruction) and will be added 4046 * to any existing set of URI permissions it already holds. 4047 * 4048 * @param resultCode The result code to propagate back to the originating 4049 * activity, often RESULT_CANCELED or RESULT_OK 4050 * @param data The data to propagate back to the originating activity. 4051 * 4052 * @see #RESULT_CANCELED 4053 * @see #RESULT_OK 4054 * @see #RESULT_FIRST_USER 4055 * @see #setResult(int) 4056 */ 4057 public final void setResult(int resultCode, Intent data) { 4058 synchronized (this) { 4059 mResultCode = resultCode; 4060 mResultData = data; 4061 } 4062 } 4063 4064 /** 4065 * Return the name of the package that invoked this activity. This is who 4066 * the data in {@link #setResult setResult()} will be sent to. You can 4067 * use this information to validate that the recipient is allowed to 4068 * receive the data. 4069 * 4070 * <p class="note">Note: if the calling activity is not expecting a result (that is it 4071 * did not use the {@link #startActivityForResult} 4072 * form that includes a request code), then the calling package will be 4073 * null.</p> 4074 * 4075 * <p class="note">Note: prior to {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, 4076 * the result from this method was unstable. If the process hosting the calling 4077 * package was no longer running, it would return null instead of the proper package 4078 * name. You can use {@link #getCallingActivity()} and retrieve the package name 4079 * from that instead.</p> 4080 * 4081 * @return The package of the activity that will receive your 4082 * reply, or null if none. 4083 */ 4084 public String getCallingPackage() { 4085 try { 4086 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 4087 } catch (RemoteException e) { 4088 return null; 4089 } 4090 } 4091 4092 /** 4093 * Return the name of the activity that invoked this activity. This is 4094 * who the data in {@link #setResult setResult()} will be sent to. You 4095 * can use this information to validate that the recipient is allowed to 4096 * receive the data. 4097 * 4098 * <p class="note">Note: if the calling activity is not expecting a result (that is it 4099 * did not use the {@link #startActivityForResult} 4100 * form that includes a request code), then the calling package will be 4101 * null. 4102 * 4103 * @return The ComponentName of the activity that will receive your 4104 * reply, or null if none. 4105 */ 4106 public ComponentName getCallingActivity() { 4107 try { 4108 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 4109 } catch (RemoteException e) { 4110 return null; 4111 } 4112 } 4113 4114 /** 4115 * Control whether this activity's main window is visible. This is intended 4116 * only for the special case of an activity that is not going to show a 4117 * UI itself, but can't just finish prior to onResume() because it needs 4118 * to wait for a service binding or such. Setting this to false allows 4119 * you to prevent your UI from being shown during that time. 4120 * 4121 * <p>The default value for this is taken from the 4122 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 4123 */ 4124 public void setVisible(boolean visible) { 4125 if (mVisibleFromClient != visible) { 4126 mVisibleFromClient = visible; 4127 if (mVisibleFromServer) { 4128 if (visible) makeVisible(); 4129 else mDecor.setVisibility(View.INVISIBLE); 4130 } 4131 } 4132 } 4133 4134 void makeVisible() { 4135 if (!mWindowAdded) { 4136 ViewManager wm = getWindowManager(); 4137 wm.addView(mDecor, getWindow().getAttributes()); 4138 mWindowAdded = true; 4139 } 4140 mDecor.setVisibility(View.VISIBLE); 4141 } 4142 4143 /** 4144 * Check to see whether this activity is in the process of finishing, 4145 * either because you called {@link #finish} on it or someone else 4146 * has requested that it finished. This is often used in 4147 * {@link #onPause} to determine whether the activity is simply pausing or 4148 * completely finishing. 4149 * 4150 * @return If the activity is finishing, returns true; else returns false. 4151 * 4152 * @see #finish 4153 */ 4154 public boolean isFinishing() { 4155 return mFinished; 4156 } 4157 4158 /** 4159 * Returns true if the final {@link #onDestroy()} call has been made 4160 * on the Activity, so this instance is now dead. 4161 */ 4162 public boolean isDestroyed() { 4163 return mDestroyed; 4164 } 4165 4166 /** 4167 * Check to see whether this activity is in the process of being destroyed in order to be 4168 * recreated with a new configuration. This is often used in 4169 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 4170 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 4171 * 4172 * @return If the activity is being torn down in order to be recreated with a new configuration, 4173 * returns true; else returns false. 4174 */ 4175 public boolean isChangingConfigurations() { 4176 return mChangingConfigurations; 4177 } 4178 4179 /** 4180 * Cause this Activity to be recreated with a new instance. This results 4181 * in essentially the same flow as when the Activity is created due to 4182 * a configuration change -- the current instance will go through its 4183 * lifecycle to {@link #onDestroy} and a new instance then created after it. 4184 */ 4185 public void recreate() { 4186 if (mParent != null) { 4187 throw new IllegalStateException("Can only be called on top-level activity"); 4188 } 4189 if (Looper.myLooper() != mMainThread.getLooper()) { 4190 throw new IllegalStateException("Must be called from main thread"); 4191 } 4192 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, false); 4193 } 4194 4195 /** 4196 * Call this when your activity is done and should be closed. The 4197 * ActivityResult is propagated back to whoever launched you via 4198 * onActivityResult(). 4199 */ 4200 public void finish() { 4201 if (mParent == null) { 4202 int resultCode; 4203 Intent resultData; 4204 synchronized (this) { 4205 resultCode = mResultCode; 4206 resultData = mResultData; 4207 } 4208 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 4209 try { 4210 if (resultData != null) { 4211 resultData.prepareToLeaveProcess(); 4212 } 4213 if (ActivityManagerNative.getDefault() 4214 .finishActivity(mToken, resultCode, resultData)) { 4215 mFinished = true; 4216 } 4217 } catch (RemoteException e) { 4218 // Empty 4219 } 4220 } else { 4221 mParent.finishFromChild(this); 4222 } 4223 } 4224 4225 /** 4226 * Finish this activity as well as all activities immediately below it 4227 * in the current task that have the same affinity. This is typically 4228 * used when an application can be launched on to another task (such as 4229 * from an ACTION_VIEW of a content type it understands) and the user 4230 * has used the up navigation to switch out of the current task and in 4231 * to its own task. In this case, if the user has navigated down into 4232 * any other activities of the second application, all of those should 4233 * be removed from the original task as part of the task switch. 4234 * 4235 * <p>Note that this finish does <em>not</em> allow you to deliver results 4236 * to the previous activity, and an exception will be thrown if you are trying 4237 * to do so.</p> 4238 */ 4239 public void finishAffinity() { 4240 if (mParent != null) { 4241 throw new IllegalStateException("Can not be called from an embedded activity"); 4242 } 4243 if (mResultCode != RESULT_CANCELED || mResultData != null) { 4244 throw new IllegalStateException("Can not be called to deliver a result"); 4245 } 4246 try { 4247 if (ActivityManagerNative.getDefault().finishActivityAffinity(mToken)) { 4248 mFinished = true; 4249 } 4250 } catch (RemoteException e) { 4251 // Empty 4252 } 4253 } 4254 4255 /** 4256 * This is called when a child activity of this one calls its 4257 * {@link #finish} method. The default implementation simply calls 4258 * finish() on this activity (the parent), finishing the entire group. 4259 * 4260 * @param child The activity making the call. 4261 * 4262 * @see #finish 4263 */ 4264 public void finishFromChild(Activity child) { 4265 finish(); 4266 } 4267 4268 /** 4269 * Force finish another activity that you had previously started with 4270 * {@link #startActivityForResult}. 4271 * 4272 * @param requestCode The request code of the activity that you had 4273 * given to startActivityForResult(). If there are multiple 4274 * activities started with this request code, they 4275 * will all be finished. 4276 */ 4277 public void finishActivity(int requestCode) { 4278 if (mParent == null) { 4279 try { 4280 ActivityManagerNative.getDefault() 4281 .finishSubActivity(mToken, mEmbeddedID, requestCode); 4282 } catch (RemoteException e) { 4283 // Empty 4284 } 4285 } else { 4286 mParent.finishActivityFromChild(this, requestCode); 4287 } 4288 } 4289 4290 /** 4291 * This is called when a child activity of this one calls its 4292 * finishActivity(). 4293 * 4294 * @param child The activity making the call. 4295 * @param requestCode Request code that had been used to start the 4296 * activity. 4297 */ 4298 public void finishActivityFromChild(Activity child, int requestCode) { 4299 try { 4300 ActivityManagerNative.getDefault() 4301 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 4302 } catch (RemoteException e) { 4303 // Empty 4304 } 4305 } 4306 4307 /** 4308 * Called when an activity you launched exits, giving you the requestCode 4309 * you started it with, the resultCode it returned, and any additional 4310 * data from it. The <var>resultCode</var> will be 4311 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 4312 * didn't return any result, or crashed during its operation. 4313 * 4314 * <p>You will receive this call immediately before onResume() when your 4315 * activity is re-starting. 4316 * 4317 * @param requestCode The integer request code originally supplied to 4318 * startActivityForResult(), allowing you to identify who this 4319 * result came from. 4320 * @param resultCode The integer result code returned by the child activity 4321 * through its setResult(). 4322 * @param data An Intent, which can return result data to the caller 4323 * (various data can be attached to Intent "extras"). 4324 * 4325 * @see #startActivityForResult 4326 * @see #createPendingResult 4327 * @see #setResult(int) 4328 */ 4329 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 4330 } 4331 4332 /** 4333 * Create a new PendingIntent object which you can hand to others 4334 * for them to use to send result data back to your 4335 * {@link #onActivityResult} callback. The created object will be either 4336 * one-shot (becoming invalid after a result is sent back) or multiple 4337 * (allowing any number of results to be sent through it). 4338 * 4339 * @param requestCode Private request code for the sender that will be 4340 * associated with the result data when it is returned. The sender can not 4341 * modify this value, allowing you to identify incoming results. 4342 * @param data Default data to supply in the result, which may be modified 4343 * by the sender. 4344 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 4345 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 4346 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 4347 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 4348 * or any of the flags as supported by 4349 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 4350 * of the intent that can be supplied when the actual send happens. 4351 * 4352 * @return Returns an existing or new PendingIntent matching the given 4353 * parameters. May return null only if 4354 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 4355 * supplied. 4356 * 4357 * @see PendingIntent 4358 */ 4359 public PendingIntent createPendingResult(int requestCode, Intent data, 4360 int flags) { 4361 String packageName = getPackageName(); 4362 try { 4363 data.prepareToLeaveProcess(); 4364 IIntentSender target = 4365 ActivityManagerNative.getDefault().getIntentSender( 4366 ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 4367 mParent == null ? mToken : mParent.mToken, 4368 mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null, 4369 UserHandle.myUserId()); 4370 return target != null ? new PendingIntent(target) : null; 4371 } catch (RemoteException e) { 4372 // Empty 4373 } 4374 return null; 4375 } 4376 4377 /** 4378 * Change the desired orientation of this activity. If the activity 4379 * is currently in the foreground or otherwise impacting the screen 4380 * orientation, the screen will immediately be changed (possibly causing 4381 * the activity to be restarted). Otherwise, this will be used the next 4382 * time the activity is visible. 4383 * 4384 * @param requestedOrientation An orientation constant as used in 4385 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 4386 */ 4387 public void setRequestedOrientation(int requestedOrientation) { 4388 if (mParent == null) { 4389 try { 4390 ActivityManagerNative.getDefault().setRequestedOrientation( 4391 mToken, requestedOrientation); 4392 } catch (RemoteException e) { 4393 // Empty 4394 } 4395 } else { 4396 mParent.setRequestedOrientation(requestedOrientation); 4397 } 4398 } 4399 4400 /** 4401 * Return the current requested orientation of the activity. This will 4402 * either be the orientation requested in its component's manifest, or 4403 * the last requested orientation given to 4404 * {@link #setRequestedOrientation(int)}. 4405 * 4406 * @return Returns an orientation constant as used in 4407 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 4408 */ 4409 public int getRequestedOrientation() { 4410 if (mParent == null) { 4411 try { 4412 return ActivityManagerNative.getDefault() 4413 .getRequestedOrientation(mToken); 4414 } catch (RemoteException e) { 4415 // Empty 4416 } 4417 } else { 4418 return mParent.getRequestedOrientation(); 4419 } 4420 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 4421 } 4422 4423 /** 4424 * Return the identifier of the task this activity is in. This identifier 4425 * will remain the same for the lifetime of the activity. 4426 * 4427 * @return Task identifier, an opaque integer. 4428 */ 4429 public int getTaskId() { 4430 try { 4431 return ActivityManagerNative.getDefault() 4432 .getTaskForActivity(mToken, false); 4433 } catch (RemoteException e) { 4434 return -1; 4435 } 4436 } 4437 4438 /** 4439 * Return whether this activity is the root of a task. The root is the 4440 * first activity in a task. 4441 * 4442 * @return True if this is the root activity, else false. 4443 */ 4444 public boolean isTaskRoot() { 4445 try { 4446 return ActivityManagerNative.getDefault() 4447 .getTaskForActivity(mToken, true) >= 0; 4448 } catch (RemoteException e) { 4449 return false; 4450 } 4451 } 4452 4453 /** 4454 * Move the task containing this activity to the back of the activity 4455 * stack. The activity's order within the task is unchanged. 4456 * 4457 * @param nonRoot If false then this only works if the activity is the root 4458 * of a task; if true it will work for any activity in 4459 * a task. 4460 * 4461 * @return If the task was moved (or it was already at the 4462 * back) true is returned, else false. 4463 */ 4464 public boolean moveTaskToBack(boolean nonRoot) { 4465 try { 4466 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 4467 mToken, nonRoot); 4468 } catch (RemoteException e) { 4469 // Empty 4470 } 4471 return false; 4472 } 4473 4474 /** 4475 * Returns class name for this activity with the package prefix removed. 4476 * This is the default name used to read and write settings. 4477 * 4478 * @return The local class name. 4479 */ 4480 public String getLocalClassName() { 4481 final String pkg = getPackageName(); 4482 final String cls = mComponent.getClassName(); 4483 int packageLen = pkg.length(); 4484 if (!cls.startsWith(pkg) || cls.length() <= packageLen 4485 || cls.charAt(packageLen) != '.') { 4486 return cls; 4487 } 4488 return cls.substring(packageLen+1); 4489 } 4490 4491 /** 4492 * Returns complete component name of this activity. 4493 * 4494 * @return Returns the complete component name for this activity 4495 */ 4496 public ComponentName getComponentName() 4497 { 4498 return mComponent; 4499 } 4500 4501 /** 4502 * Retrieve a {@link SharedPreferences} object for accessing preferences 4503 * that are private to this activity. This simply calls the underlying 4504 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 4505 * class name as the preferences name. 4506 * 4507 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 4508 * operation, {@link #MODE_WORLD_READABLE} and 4509 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 4510 * 4511 * @return Returns the single SharedPreferences instance that can be used 4512 * to retrieve and modify the preference values. 4513 */ 4514 public SharedPreferences getPreferences(int mode) { 4515 return getSharedPreferences(getLocalClassName(), mode); 4516 } 4517 4518 private void ensureSearchManager() { 4519 if (mSearchManager != null) { 4520 return; 4521 } 4522 4523 mSearchManager = new SearchManager(this, null); 4524 } 4525 4526 @Override 4527 public Object getSystemService(String name) { 4528 if (getBaseContext() == null) { 4529 throw new IllegalStateException( 4530 "System services not available to Activities before onCreate()"); 4531 } 4532 4533 if (WINDOW_SERVICE.equals(name)) { 4534 return mWindowManager; 4535 } else if (SEARCH_SERVICE.equals(name)) { 4536 ensureSearchManager(); 4537 return mSearchManager; 4538 } 4539 return super.getSystemService(name); 4540 } 4541 4542 /** 4543 * Change the title associated with this activity. If this is a 4544 * top-level activity, the title for its window will change. If it 4545 * is an embedded activity, the parent can do whatever it wants 4546 * with it. 4547 */ 4548 public void setTitle(CharSequence title) { 4549 mTitle = title; 4550 onTitleChanged(title, mTitleColor); 4551 4552 if (mParent != null) { 4553 mParent.onChildTitleChanged(this, title); 4554 } 4555 } 4556 4557 /** 4558 * Change the title associated with this activity. If this is a 4559 * top-level activity, the title for its window will change. If it 4560 * is an embedded activity, the parent can do whatever it wants 4561 * with it. 4562 */ 4563 public void setTitle(int titleId) { 4564 setTitle(getText(titleId)); 4565 } 4566 4567 public void setTitleColor(int textColor) { 4568 mTitleColor = textColor; 4569 onTitleChanged(mTitle, textColor); 4570 } 4571 4572 public final CharSequence getTitle() { 4573 return mTitle; 4574 } 4575 4576 public final int getTitleColor() { 4577 return mTitleColor; 4578 } 4579 4580 protected void onTitleChanged(CharSequence title, int color) { 4581 if (mTitleReady) { 4582 final Window win = getWindow(); 4583 if (win != null) { 4584 win.setTitle(title); 4585 if (color != 0) { 4586 win.setTitleColor(color); 4587 } 4588 } 4589 } 4590 } 4591 4592 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 4593 } 4594 4595 /** 4596 * Sets the visibility of the progress bar in the title. 4597 * <p> 4598 * In order for the progress bar to be shown, the feature must be requested 4599 * via {@link #requestWindowFeature(int)}. 4600 * 4601 * @param visible Whether to show the progress bars in the title. 4602 */ 4603 public final void setProgressBarVisibility(boolean visible) { 4604 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 4605 Window.PROGRESS_VISIBILITY_OFF); 4606 } 4607 4608 /** 4609 * Sets the visibility of the indeterminate progress bar in the title. 4610 * <p> 4611 * In order for the progress bar to be shown, the feature must be requested 4612 * via {@link #requestWindowFeature(int)}. 4613 * 4614 * @param visible Whether to show the progress bars in the title. 4615 */ 4616 public final void setProgressBarIndeterminateVisibility(boolean visible) { 4617 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 4618 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 4619 } 4620 4621 /** 4622 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 4623 * is always indeterminate). 4624 * <p> 4625 * In order for the progress bar to be shown, the feature must be requested 4626 * via {@link #requestWindowFeature(int)}. 4627 * 4628 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 4629 */ 4630 public final void setProgressBarIndeterminate(boolean indeterminate) { 4631 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4632 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 4633 } 4634 4635 /** 4636 * Sets the progress for the progress bars in the title. 4637 * <p> 4638 * In order for the progress bar to be shown, the feature must be requested 4639 * via {@link #requestWindowFeature(int)}. 4640 * 4641 * @param progress The progress for the progress bar. Valid ranges are from 4642 * 0 to 10000 (both inclusive). If 10000 is given, the progress 4643 * bar will be completely filled and will fade out. 4644 */ 4645 public final void setProgress(int progress) { 4646 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 4647 } 4648 4649 /** 4650 * Sets the secondary progress for the progress bar in the title. This 4651 * progress is drawn between the primary progress (set via 4652 * {@link #setProgress(int)} and the background. It can be ideal for media 4653 * scenarios such as showing the buffering progress while the default 4654 * progress shows the play progress. 4655 * <p> 4656 * In order for the progress bar to be shown, the feature must be requested 4657 * via {@link #requestWindowFeature(int)}. 4658 * 4659 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 4660 * 0 to 10000 (both inclusive). 4661 */ 4662 public final void setSecondaryProgress(int secondaryProgress) { 4663 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4664 secondaryProgress + Window.PROGRESS_SECONDARY_START); 4665 } 4666 4667 /** 4668 * Suggests an audio stream whose volume should be changed by the hardware 4669 * volume controls. 4670 * <p> 4671 * The suggested audio stream will be tied to the window of this Activity. 4672 * If the Activity is switched, the stream set here is no longer the 4673 * suggested stream. The client does not need to save and restore the old 4674 * suggested stream value in onPause and onResume. 4675 * 4676 * @param streamType The type of the audio stream whose volume should be 4677 * changed by the hardware volume controls. It is not guaranteed that 4678 * the hardware volume controls will always change this stream's 4679 * volume (for example, if a call is in progress, its stream's volume 4680 * may be changed instead). To reset back to the default, use 4681 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 4682 */ 4683 public final void setVolumeControlStream(int streamType) { 4684 getWindow().setVolumeControlStream(streamType); 4685 } 4686 4687 /** 4688 * Gets the suggested audio stream whose volume should be changed by the 4689 * harwdare volume controls. 4690 * 4691 * @return The suggested audio stream type whose volume should be changed by 4692 * the hardware volume controls. 4693 * @see #setVolumeControlStream(int) 4694 */ 4695 public final int getVolumeControlStream() { 4696 return getWindow().getVolumeControlStream(); 4697 } 4698 4699 /** 4700 * Runs the specified action on the UI thread. If the current thread is the UI 4701 * thread, then the action is executed immediately. If the current thread is 4702 * not the UI thread, the action is posted to the event queue of the UI thread. 4703 * 4704 * @param action the action to run on the UI thread 4705 */ 4706 public final void runOnUiThread(Runnable action) { 4707 if (Thread.currentThread() != mUiThread) { 4708 mHandler.post(action); 4709 } else { 4710 action.run(); 4711 } 4712 } 4713 4714 /** 4715 * Standard implementation of 4716 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 4717 * inflating with the LayoutInflater returned by {@link #getSystemService}. 4718 * This implementation does nothing and is for 4719 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 4720 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 4721 * 4722 * @see android.view.LayoutInflater#createView 4723 * @see android.view.Window#getLayoutInflater 4724 */ 4725 public View onCreateView(String name, Context context, AttributeSet attrs) { 4726 return null; 4727 } 4728 4729 /** 4730 * Standard implementation of 4731 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 4732 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 4733 * This implementation handles <fragment> tags to embed fragments inside 4734 * of the activity. 4735 * 4736 * @see android.view.LayoutInflater#createView 4737 * @see android.view.Window#getLayoutInflater 4738 */ 4739 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 4740 if (!"fragment".equals(name)) { 4741 return onCreateView(name, context, attrs); 4742 } 4743 4744 String fname = attrs.getAttributeValue(null, "class"); 4745 TypedArray a = 4746 context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Fragment); 4747 if (fname == null) { 4748 fname = a.getString(com.android.internal.R.styleable.Fragment_name); 4749 } 4750 int id = a.getResourceId(com.android.internal.R.styleable.Fragment_id, View.NO_ID); 4751 String tag = a.getString(com.android.internal.R.styleable.Fragment_tag); 4752 a.recycle(); 4753 4754 int containerId = parent != null ? parent.getId() : 0; 4755 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 4756 throw new IllegalArgumentException(attrs.getPositionDescription() 4757 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 4758 } 4759 4760 // If we restored from a previous state, we may already have 4761 // instantiated this fragment from the state and should use 4762 // that instance instead of making a new one. 4763 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 4764 if (fragment == null && tag != null) { 4765 fragment = mFragments.findFragmentByTag(tag); 4766 } 4767 if (fragment == null && containerId != View.NO_ID) { 4768 fragment = mFragments.findFragmentById(containerId); 4769 } 4770 4771 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 4772 + Integer.toHexString(id) + " fname=" + fname 4773 + " existing=" + fragment); 4774 if (fragment == null) { 4775 fragment = Fragment.instantiate(this, fname); 4776 fragment.mFromLayout = true; 4777 fragment.mFragmentId = id != 0 ? id : containerId; 4778 fragment.mContainerId = containerId; 4779 fragment.mTag = tag; 4780 fragment.mInLayout = true; 4781 fragment.mFragmentManager = mFragments; 4782 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4783 mFragments.addFragment(fragment, true); 4784 4785 } else if (fragment.mInLayout) { 4786 // A fragment already exists and it is not one we restored from 4787 // previous state. 4788 throw new IllegalArgumentException(attrs.getPositionDescription() 4789 + ": Duplicate id 0x" + Integer.toHexString(id) 4790 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 4791 + " with another fragment for " + fname); 4792 } else { 4793 // This fragment was retained from a previous instance; get it 4794 // going now. 4795 fragment.mInLayout = true; 4796 // If this fragment is newly instantiated (either right now, or 4797 // from last saved state), then give it the attributes to 4798 // initialize itself. 4799 if (!fragment.mRetaining) { 4800 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4801 } 4802 mFragments.moveToState(fragment); 4803 } 4804 4805 if (fragment.mView == null) { 4806 throw new IllegalStateException("Fragment " + fname 4807 + " did not create a view."); 4808 } 4809 if (id != 0) { 4810 fragment.mView.setId(id); 4811 } 4812 if (fragment.mView.getTag() == null) { 4813 fragment.mView.setTag(tag); 4814 } 4815 return fragment.mView; 4816 } 4817 4818 /** 4819 * Print the Activity's state into the given stream. This gets invoked if 4820 * you run "adb shell dumpsys activity <activity_component_name>". 4821 * 4822 * @param prefix Desired prefix to prepend at each line of output. 4823 * @param fd The raw file descriptor that the dump is being sent to. 4824 * @param writer The PrintWriter to which you should dump your state. This will be 4825 * closed for you after you return. 4826 * @param args additional arguments to the dump request. 4827 */ 4828 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4829 dumpInner(prefix, fd, writer, args); 4830 } 4831 4832 void dumpInner(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4833 writer.print(prefix); writer.print("Local Activity "); 4834 writer.print(Integer.toHexString(System.identityHashCode(this))); 4835 writer.println(" State:"); 4836 String innerPrefix = prefix + " "; 4837 writer.print(innerPrefix); writer.print("mResumed="); 4838 writer.print(mResumed); writer.print(" mStopped="); 4839 writer.print(mStopped); writer.print(" mFinished="); 4840 writer.println(mFinished); 4841 writer.print(innerPrefix); writer.print("mLoadersStarted="); 4842 writer.println(mLoadersStarted); 4843 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 4844 writer.println(mChangingConfigurations); 4845 writer.print(innerPrefix); writer.print("mCurrentConfig="); 4846 writer.println(mCurrentConfig); 4847 if (mLoaderManager != null) { 4848 writer.print(prefix); writer.print("Loader Manager "); 4849 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 4850 writer.println(":"); 4851 mLoaderManager.dump(prefix + " ", fd, writer, args); 4852 } 4853 mFragments.dump(prefix, fd, writer, args); 4854 writer.print(prefix); writer.println("View Hierarchy:"); 4855 dumpViewHierarchy(prefix + " ", writer, getWindow().getDecorView()); 4856 } 4857 4858 private void dumpViewHierarchy(String prefix, PrintWriter writer, View view) { 4859 writer.print(prefix); 4860 if (view == null) { 4861 writer.println("null"); 4862 return; 4863 } 4864 writer.println(view.toString()); 4865 if (!(view instanceof ViewGroup)) { 4866 return; 4867 } 4868 ViewGroup grp = (ViewGroup)view; 4869 final int N = grp.getChildCount(); 4870 if (N <= 0) { 4871 return; 4872 } 4873 prefix = prefix + " "; 4874 for (int i=0; i<N; i++) { 4875 dumpViewHierarchy(prefix, writer, grp.getChildAt(i)); 4876 } 4877 } 4878 4879 /** 4880 * Bit indicating that this activity is "immersive" and should not be 4881 * interrupted by notifications if possible. 4882 * 4883 * This value is initially set by the manifest property 4884 * <code>android:immersive</code> but may be changed at runtime by 4885 * {@link #setImmersive}. 4886 * 4887 * @see #setImmersive(boolean) 4888 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4889 */ 4890 public boolean isImmersive() { 4891 try { 4892 return ActivityManagerNative.getDefault().isImmersive(mToken); 4893 } catch (RemoteException e) { 4894 return false; 4895 } 4896 } 4897 4898 /** 4899 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} to a 4900 * fullscreen opaque Activity. 4901 * <p> 4902 * Call this whenever the background of a translucent Activity has changed to become opaque. 4903 * Doing so will allow the {@link android.view.Surface} of the Activity behind to be released. 4904 * <p> 4905 * This call has no effect on non-translucent activities or on activities with the 4906 * {@link android.R.attr#windowIsFloating} attribute. 4907 * 4908 * @see #convertToTranslucent(TranslucentConversionListener) 4909 * @see TranslucentConversionListener 4910 */ 4911 public void convertFromTranslucent() { 4912 try { 4913 mTranslucentCallback = null; 4914 if (ActivityManagerNative.getDefault().convertFromTranslucent(mToken)) { 4915 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, true); 4916 } 4917 } catch (RemoteException e) { 4918 // pass 4919 } 4920 } 4921 4922 /** 4923 * Convert a translucent themed Activity {@link android.R.attr#windowIsTranslucent} back from 4924 * opaque to translucent following a call to {@link #convertFromTranslucent()}. 4925 * <p> 4926 * Calling this allows the Activity behind this one to be seen again. Once all such Activities 4927 * have been redrawn {@link TranslucentConversionListener#onTranslucentConversionComplete} will 4928 * be called indicating that it is safe to make this activity translucent again. Until 4929 * {@link TranslucentConversionListener#onTranslucentConversionComplete} is called the image 4930 * behind the frontmost Activity will be indeterminate. 4931 * <p> 4932 * This call has no effect on non-translucent activities or on activities with the 4933 * {@link android.R.attr#windowIsFloating} attribute. 4934 * 4935 * @param callback the method to call when all visible Activities behind this one have been 4936 * drawn and it is safe to make this Activity translucent again. 4937 * 4938 * @see #convertFromTranslucent() 4939 * @see TranslucentConversionListener 4940 */ 4941 public void convertToTranslucent(TranslucentConversionListener callback) { 4942 try { 4943 mTranslucentCallback = callback; 4944 mChangeCanvasToTranslucent = 4945 ActivityManagerNative.getDefault().convertToTranslucent(mToken); 4946 } catch (RemoteException e) { 4947 // pass 4948 } 4949 } 4950 4951 /** @hide */ 4952 void onTranslucentConversionComplete(boolean drawComplete) { 4953 if (mTranslucentCallback != null) { 4954 mTranslucentCallback.onTranslucentConversionComplete(drawComplete); 4955 mTranslucentCallback = null; 4956 } 4957 if (mChangeCanvasToTranslucent) { 4958 WindowManagerGlobal.getInstance().changeCanvasOpacity(mToken, false); 4959 } 4960 } 4961 4962 /** 4963 * Adjust the current immersive mode setting. 4964 * 4965 * Note that changing this value will have no effect on the activity's 4966 * {@link android.content.pm.ActivityInfo} structure; that is, if 4967 * <code>android:immersive</code> is set to <code>true</code> 4968 * in the application's manifest entry for this activity, the {@link 4969 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 4970 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4971 * FLAG_IMMERSIVE} bit set. 4972 * 4973 * @see #isImmersive() 4974 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4975 */ 4976 public void setImmersive(boolean i) { 4977 try { 4978 ActivityManagerNative.getDefault().setImmersive(mToken, i); 4979 } catch (RemoteException e) { 4980 // pass 4981 } 4982 } 4983 4984 /** 4985 * Start an action mode. 4986 * 4987 * @param callback Callback that will manage lifecycle events for this context mode 4988 * @return The ContextMode that was started, or null if it was canceled 4989 * 4990 * @see ActionMode 4991 */ 4992 public ActionMode startActionMode(ActionMode.Callback callback) { 4993 return mWindow.getDecorView().startActionMode(callback); 4994 } 4995 4996 /** 4997 * Give the Activity a chance to control the UI for an action mode requested 4998 * by the system. 4999 * 5000 * <p>Note: If you are looking for a notification callback that an action mode 5001 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 5002 * 5003 * @param callback The callback that should control the new action mode 5004 * @return The new action mode, or <code>null</code> if the activity does not want to 5005 * provide special handling for this action mode. (It will be handled by the system.) 5006 */ 5007 @Override 5008 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 5009 initActionBar(); 5010 if (mActionBar != null) { 5011 return mActionBar.startActionMode(callback); 5012 } 5013 return null; 5014 } 5015 5016 /** 5017 * Notifies the Activity that an action mode has been started. 5018 * Activity subclasses overriding this method should call the superclass implementation. 5019 * 5020 * @param mode The new action mode. 5021 */ 5022 @Override 5023 public void onActionModeStarted(ActionMode mode) { 5024 } 5025 5026 /** 5027 * Notifies the activity that an action mode has finished. 5028 * Activity subclasses overriding this method should call the superclass implementation. 5029 * 5030 * @param mode The action mode that just finished. 5031 */ 5032 @Override 5033 public void onActionModeFinished(ActionMode mode) { 5034 } 5035 5036 /** 5037 * Returns true if the app should recreate the task when navigating 'up' from this activity 5038 * by using targetIntent. 5039 * 5040 * <p>If this method returns false the app can trivially call 5041 * {@link #navigateUpTo(Intent)} using the same parameters to correctly perform 5042 * up navigation. If this method returns false, the app should synthesize a new task stack 5043 * by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation.</p> 5044 * 5045 * @param targetIntent An intent representing the target destination for up navigation 5046 * @return true if navigating up should recreate a new task stack, false if the same task 5047 * should be used for the destination 5048 */ 5049 public boolean shouldUpRecreateTask(Intent targetIntent) { 5050 try { 5051 PackageManager pm = getPackageManager(); 5052 ComponentName cn = targetIntent.getComponent(); 5053 if (cn == null) { 5054 cn = targetIntent.resolveActivity(pm); 5055 } 5056 ActivityInfo info = pm.getActivityInfo(cn, 0); 5057 if (info.taskAffinity == null) { 5058 return false; 5059 } 5060 return !ActivityManagerNative.getDefault() 5061 .targetTaskAffinityMatchesActivity(mToken, info.taskAffinity); 5062 } catch (RemoteException e) { 5063 return false; 5064 } catch (NameNotFoundException e) { 5065 return false; 5066 } 5067 } 5068 5069 /** 5070 * Navigate from this activity to the activity specified by upIntent, finishing this activity 5071 * in the process. If the activity indicated by upIntent already exists in the task's history, 5072 * this activity and all others before the indicated activity in the history stack will be 5073 * finished. 5074 * 5075 * <p>If the indicated activity does not appear in the history stack, this will finish 5076 * each activity in this task until the root activity of the task is reached, resulting in 5077 * an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy 5078 * when an activity may be reached by a path not passing through a canonical parent 5079 * activity.</p> 5080 * 5081 * <p>This method should be used when performing up navigation from within the same task 5082 * as the destination. If up navigation should cross tasks in some cases, see 5083 * {@link #shouldUpRecreateTask(Intent)}.</p> 5084 * 5085 * @param upIntent An intent representing the target destination for up navigation 5086 * 5087 * @return true if up navigation successfully reached the activity indicated by upIntent and 5088 * upIntent was delivered to it. false if an instance of the indicated activity could 5089 * not be found and this activity was simply finished normally. 5090 */ 5091 public boolean navigateUpTo(Intent upIntent) { 5092 if (mParent == null) { 5093 ComponentName destInfo = upIntent.getComponent(); 5094 if (destInfo == null) { 5095 destInfo = upIntent.resolveActivity(getPackageManager()); 5096 if (destInfo == null) { 5097 return false; 5098 } 5099 upIntent = new Intent(upIntent); 5100 upIntent.setComponent(destInfo); 5101 } 5102 int resultCode; 5103 Intent resultData; 5104 synchronized (this) { 5105 resultCode = mResultCode; 5106 resultData = mResultData; 5107 } 5108 if (resultData != null) { 5109 resultData.prepareToLeaveProcess(); 5110 } 5111 try { 5112 upIntent.prepareToLeaveProcess(); 5113 return ActivityManagerNative.getDefault().navigateUpTo(mToken, upIntent, 5114 resultCode, resultData); 5115 } catch (RemoteException e) { 5116 return false; 5117 } 5118 } else { 5119 return mParent.navigateUpToFromChild(this, upIntent); 5120 } 5121 } 5122 5123 /** 5124 * This is called when a child activity of this one calls its 5125 * {@link #navigateUpTo} method. The default implementation simply calls 5126 * navigateUpTo(upIntent) on this activity (the parent). 5127 * 5128 * @param child The activity making the call. 5129 * @param upIntent An intent representing the target destination for up navigation 5130 * 5131 * @return true if up navigation successfully reached the activity indicated by upIntent and 5132 * upIntent was delivered to it. false if an instance of the indicated activity could 5133 * not be found and this activity was simply finished normally. 5134 */ 5135 public boolean navigateUpToFromChild(Activity child, Intent upIntent) { 5136 return navigateUpTo(upIntent); 5137 } 5138 5139 /** 5140 * Obtain an {@link Intent} that will launch an explicit target activity specified by 5141 * this activity's logical parent. The logical parent is named in the application's manifest 5142 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute. 5143 * Activity subclasses may override this method to modify the Intent returned by 5144 * super.getParentActivityIntent() or to implement a different mechanism of retrieving 5145 * the parent intent entirely. 5146 * 5147 * @return a new Intent targeting the defined parent of this activity or null if 5148 * there is no valid parent. 5149 */ 5150 public Intent getParentActivityIntent() { 5151 final String parentName = mActivityInfo.parentActivityName; 5152 if (TextUtils.isEmpty(parentName)) { 5153 return null; 5154 } 5155 5156 // If the parent itself has no parent, generate a main activity intent. 5157 final ComponentName target = new ComponentName(this, parentName); 5158 try { 5159 final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0); 5160 final String parentActivity = parentInfo.parentActivityName; 5161 final Intent parentIntent = parentActivity == null 5162 ? Intent.makeMainActivity(target) 5163 : new Intent().setComponent(target); 5164 return parentIntent; 5165 } catch (NameNotFoundException e) { 5166 Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName + 5167 "' in manifest"); 5168 return null; 5169 } 5170 } 5171 5172 // ------------------ Internal API ------------------ 5173 5174 final void setParent(Activity parent) { 5175 mParent = parent; 5176 } 5177 5178 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 5179 Application application, Intent intent, ActivityInfo info, CharSequence title, 5180 Activity parent, String id, NonConfigurationInstances lastNonConfigurationInstances, 5181 Configuration config) { 5182 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 5183 lastNonConfigurationInstances, config); 5184 } 5185 5186 final void attach(Context context, ActivityThread aThread, 5187 Instrumentation instr, IBinder token, int ident, 5188 Application application, Intent intent, ActivityInfo info, 5189 CharSequence title, Activity parent, String id, 5190 NonConfigurationInstances lastNonConfigurationInstances, 5191 Configuration config) { 5192 attachBaseContext(context); 5193 5194 mFragments.attachActivity(this, mContainer, null); 5195 5196 mWindow = PolicyManager.makeNewWindow(this); 5197 mWindow.setCallback(this); 5198 mWindow.getLayoutInflater().setPrivateFactory(this); 5199 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 5200 mWindow.setSoftInputMode(info.softInputMode); 5201 } 5202 if (info.uiOptions != 0) { 5203 mWindow.setUiOptions(info.uiOptions); 5204 } 5205 mUiThread = Thread.currentThread(); 5206 5207 mMainThread = aThread; 5208 mInstrumentation = instr; 5209 mToken = token; 5210 mIdent = ident; 5211 mApplication = application; 5212 mIntent = intent; 5213 mComponent = intent.getComponent(); 5214 mActivityInfo = info; 5215 mTitle = title; 5216 mParent = parent; 5217 mEmbeddedID = id; 5218 mLastNonConfigurationInstances = lastNonConfigurationInstances; 5219 5220 mWindow.setWindowManager( 5221 (WindowManager)context.getSystemService(Context.WINDOW_SERVICE), 5222 mToken, mComponent.flattenToString(), 5223 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 5224 if (mParent != null) { 5225 mWindow.setContainer(mParent.getWindow()); 5226 } 5227 mWindowManager = mWindow.getWindowManager(); 5228 mCurrentConfig = config; 5229 } 5230 5231 /** @hide */ 5232 public final IBinder getActivityToken() { 5233 return mParent != null ? mParent.getActivityToken() : mToken; 5234 } 5235 5236 final void performCreate(Bundle icicle) { 5237 onCreate(icicle); 5238 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 5239 com.android.internal.R.styleable.Window_windowNoDisplay, false); 5240 mFragments.dispatchActivityCreated(); 5241 } 5242 5243 final void performStart() { 5244 mFragments.noteStateNotSaved(); 5245 mCalled = false; 5246 mFragments.execPendingActions(); 5247 mInstrumentation.callActivityOnStart(this); 5248 if (!mCalled) { 5249 throw new SuperNotCalledException( 5250 "Activity " + mComponent.toShortString() + 5251 " did not call through to super.onStart()"); 5252 } 5253 mFragments.dispatchStart(); 5254 if (mAllLoaderManagers != null) { 5255 final int N = mAllLoaderManagers.size(); 5256 LoaderManagerImpl loaders[] = new LoaderManagerImpl[N]; 5257 for (int i=N-1; i>=0; i--) { 5258 loaders[i] = mAllLoaderManagers.valueAt(i); 5259 } 5260 for (int i=0; i<N; i++) { 5261 LoaderManagerImpl lm = loaders[i]; 5262 lm.finishRetain(); 5263 lm.doReportStart(); 5264 } 5265 } 5266 } 5267 5268 final void performRestart() { 5269 mFragments.noteStateNotSaved(); 5270 5271 if (mStopped) { 5272 mStopped = false; 5273 if (mToken != null && mParent == null) { 5274 WindowManagerGlobal.getInstance().setStoppedState(mToken, false); 5275 } 5276 5277 synchronized (mManagedCursors) { 5278 final int N = mManagedCursors.size(); 5279 for (int i=0; i<N; i++) { 5280 ManagedCursor mc = mManagedCursors.get(i); 5281 if (mc.mReleased || mc.mUpdated) { 5282 if (!mc.mCursor.requery()) { 5283 if (getApplicationInfo().targetSdkVersion 5284 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 5285 throw new IllegalStateException( 5286 "trying to requery an already closed cursor " 5287 + mc.mCursor); 5288 } 5289 } 5290 mc.mReleased = false; 5291 mc.mUpdated = false; 5292 } 5293 } 5294 } 5295 5296 mCalled = false; 5297 mInstrumentation.callActivityOnRestart(this); 5298 if (!mCalled) { 5299 throw new SuperNotCalledException( 5300 "Activity " + mComponent.toShortString() + 5301 " did not call through to super.onRestart()"); 5302 } 5303 performStart(); 5304 } 5305 } 5306 5307 final void performResume() { 5308 performRestart(); 5309 5310 mFragments.execPendingActions(); 5311 5312 mLastNonConfigurationInstances = null; 5313 5314 mCalled = false; 5315 // mResumed is set by the instrumentation 5316 mInstrumentation.callActivityOnResume(this); 5317 if (!mCalled) { 5318 throw new SuperNotCalledException( 5319 "Activity " + mComponent.toShortString() + 5320 " did not call through to super.onResume()"); 5321 } 5322 5323 // Now really resume, and install the current status bar and menu. 5324 mCalled = false; 5325 5326 mFragments.dispatchResume(); 5327 mFragments.execPendingActions(); 5328 5329 onPostResume(); 5330 if (!mCalled) { 5331 throw new SuperNotCalledException( 5332 "Activity " + mComponent.toShortString() + 5333 " did not call through to super.onPostResume()"); 5334 } 5335 } 5336 5337 final void performPause() { 5338 mDoReportFullyDrawn = false; 5339 mFragments.dispatchPause(); 5340 mCalled = false; 5341 onPause(); 5342 mResumed = false; 5343 if (!mCalled && getApplicationInfo().targetSdkVersion 5344 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 5345 throw new SuperNotCalledException( 5346 "Activity " + mComponent.toShortString() + 5347 " did not call through to super.onPause()"); 5348 } 5349 mResumed = false; 5350 } 5351 5352 final void performUserLeaving() { 5353 onUserInteraction(); 5354 onUserLeaveHint(); 5355 } 5356 5357 final void performStop() { 5358 mDoReportFullyDrawn = false; 5359 if (mLoadersStarted) { 5360 mLoadersStarted = false; 5361 if (mLoaderManager != null) { 5362 if (!mChangingConfigurations) { 5363 mLoaderManager.doStop(); 5364 } else { 5365 mLoaderManager.doRetain(); 5366 } 5367 } 5368 } 5369 5370 if (!mStopped) { 5371 if (mWindow != null) { 5372 mWindow.closeAllPanels(); 5373 } 5374 5375 if (mToken != null && mParent == null) { 5376 WindowManagerGlobal.getInstance().setStoppedState(mToken, true); 5377 } 5378 5379 mFragments.dispatchStop(); 5380 5381 mCalled = false; 5382 mInstrumentation.callActivityOnStop(this); 5383 if (!mCalled) { 5384 throw new SuperNotCalledException( 5385 "Activity " + mComponent.toShortString() + 5386 " did not call through to super.onStop()"); 5387 } 5388 5389 synchronized (mManagedCursors) { 5390 final int N = mManagedCursors.size(); 5391 for (int i=0; i<N; i++) { 5392 ManagedCursor mc = mManagedCursors.get(i); 5393 if (!mc.mReleased) { 5394 mc.mCursor.deactivate(); 5395 mc.mReleased = true; 5396 } 5397 } 5398 } 5399 5400 mStopped = true; 5401 } 5402 mResumed = false; 5403 } 5404 5405 final void performDestroy() { 5406 mDestroyed = true; 5407 mWindow.destroy(); 5408 mFragments.dispatchDestroy(); 5409 onDestroy(); 5410 if (mLoaderManager != null) { 5411 mLoaderManager.doDestroy(); 5412 } 5413 } 5414 5415 /** 5416 * @hide 5417 */ 5418 public final boolean isResumed() { 5419 return mResumed; 5420 } 5421 5422 void dispatchActivityResult(String who, int requestCode, 5423 int resultCode, Intent data) { 5424 if (false) Log.v( 5425 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 5426 + ", resCode=" + resultCode + ", data=" + data); 5427 mFragments.noteStateNotSaved(); 5428 if (who == null) { 5429 onActivityResult(requestCode, resultCode, data); 5430 } else { 5431 Fragment frag = mFragments.findFragmentByWho(who); 5432 if (frag != null) { 5433 frag.onActivityResult(requestCode, resultCode, data); 5434 } 5435 } 5436 } 5437 5438 /** 5439 * Interface for informing a translucent {@link Activity} once all visible activities below it 5440 * have completed drawing. This is necessary only after an {@link Activity} has been made 5441 * opaque using {@link Activity#convertFromTranslucent()} and before it has been drawn 5442 * translucent again following a call to {@link 5443 * Activity#convertToTranslucent(TranslucentConversionListener)}. 5444 */ 5445 public interface TranslucentConversionListener { 5446 /** 5447 * Callback made following {@link Activity#convertToTranslucent} once all visible Activities 5448 * below the top one have been redrawn. Following this callback it is safe to make the top 5449 * Activity translucent because the underlying Activity has been drawn. 5450 * 5451 * @param drawComplete True if the background Activity has drawn itself. False if a timeout 5452 * occurred waiting for the Activity to complete drawing. 5453 * 5454 * @see Activity#convertFromTranslucent() 5455 * @see Activity#convertToTranslucent(TranslucentConversionListener) 5456 */ 5457 public void onTranslucentConversionComplete(boolean drawComplete); 5458 } 5459} 5460