Activity.java revision 7b1c0f679e2fbc697a00253733c2200cd4817adf
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.app; 18 19import com.android.internal.app.ActionBarImpl; 20import com.android.internal.policy.PolicyManager; 21 22import android.content.ComponentCallbacks; 23import android.content.ComponentName; 24import android.content.ContentResolver; 25import android.content.Context; 26import android.content.CursorLoader; 27import android.content.IIntentSender; 28import android.content.Intent; 29import android.content.IntentSender; 30import android.content.SharedPreferences; 31import android.content.pm.ActivityInfo; 32import android.content.res.Configuration; 33import android.content.res.Resources; 34import android.content.res.TypedArray; 35import android.database.Cursor; 36import android.graphics.Bitmap; 37import android.graphics.Canvas; 38import android.graphics.drawable.Drawable; 39import android.media.AudioManager; 40import android.net.Uri; 41import android.os.Build; 42import android.os.Bundle; 43import android.os.Handler; 44import android.os.IBinder; 45import android.os.Looper; 46import android.os.Parcelable; 47import android.os.RemoteException; 48import android.os.StrictMode; 49import android.text.Selection; 50import android.text.SpannableStringBuilder; 51import android.text.TextUtils; 52import android.text.method.TextKeyListener; 53import android.util.AttributeSet; 54import android.util.EventLog; 55import android.util.Log; 56import android.util.SparseArray; 57import android.view.ActionMode; 58import android.view.ContextMenu; 59import android.view.ContextMenu.ContextMenuInfo; 60import android.view.ContextThemeWrapper; 61import android.view.KeyEvent; 62import android.view.LayoutInflater; 63import android.view.Menu; 64import android.view.MenuInflater; 65import android.view.MenuItem; 66import android.view.MotionEvent; 67import android.view.View; 68import android.view.WindowManagerImpl; 69import android.view.View.OnCreateContextMenuListener; 70import android.view.ViewGroup; 71import android.view.ViewGroup.LayoutParams; 72import android.view.ViewManager; 73import android.view.Window; 74import android.view.WindowManager; 75import android.view.accessibility.AccessibilityEvent; 76import android.widget.AdapterView; 77 78import java.io.FileDescriptor; 79import java.io.PrintWriter; 80import java.util.ArrayList; 81import java.util.HashMap; 82 83/** 84 * An activity is a single, focused thing that the user can do. Almost all 85 * activities interact with the user, so the Activity class takes care of 86 * creating a window for you in which you can place your UI with 87 * {@link #setContentView}. While activities are often presented to the user 88 * as full-screen windows, they can also be used in other ways: as floating 89 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 90 * or embedded inside of another activity (using {@link ActivityGroup}). 91 * 92 * There are two methods almost all subclasses of Activity will implement: 93 * 94 * <ul> 95 * <li> {@link #onCreate} is where you initialize your activity. Most 96 * importantly, here you will usually call {@link #setContentView(int)} 97 * with a layout resource defining your UI, and using {@link #findViewById} 98 * to retrieve the widgets in that UI that you need to interact with 99 * programmatically. 100 * 101 * <li> {@link #onPause} is where you deal with the user leaving your 102 * activity. Most importantly, any changes made by the user should at this 103 * point be committed (usually to the 104 * {@link android.content.ContentProvider} holding the data). 105 * </ul> 106 * 107 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 108 * activity classes must have a corresponding 109 * {@link android.R.styleable#AndroidManifestActivity <activity>} 110 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 111 * 112 * <p>The Activity class is an important part of an application's overall lifecycle, 113 * and the way activities are launched and put together is a fundamental 114 * part of the platform's application model. For a detailed perspective on the structure of an 115 * Android application and how activities behave, please read the 116 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 117 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 118 * documents.</p> 119 * 120 * <p>You can also find a detailed discussion about how to create activities in the 121 * <a href="{@docRoot}guide/topics/fundamentals/activities.html">Activities</a> 122 * document.</p> 123 * 124 * <p>Topics covered here: 125 * <ol> 126 * <li><a href="#Fragments">Fragments</a> 127 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 128 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 129 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 130 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 131 * <li><a href="#Permissions">Permissions</a> 132 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 133 * </ol> 134 * 135 * <a name="Fragments"></a> 136 * <h3>Fragments</h3> 137 * 138 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 139 * implementations can make use of the {@link Fragment} class to better 140 * modularize their code, build more sophisticated user interfaces for larger 141 * screens, and help scale their application between small and large screens. 142 * 143 * <a name="ActivityLifecycle"></a> 144 * <h3>Activity Lifecycle</h3> 145 * 146 * <p>Activities in the system are managed as an <em>activity stack</em>. 147 * When a new activity is started, it is placed on the top of the stack 148 * and becomes the running activity -- the previous activity always remains 149 * below it in the stack, and will not come to the foreground again until 150 * the new activity exits.</p> 151 * 152 * <p>An activity has essentially four states:</p> 153 * <ul> 154 * <li> If an activity in the foreground of the screen (at the top of 155 * the stack), 156 * it is <em>active</em> or <em>running</em>. </li> 157 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 158 * or transparent activity has focus on top of your activity), it 159 * is <em>paused</em>. A paused activity is completely alive (it 160 * maintains all state and member information and remains attached to 161 * the window manager), but can be killed by the system in extreme 162 * low memory situations. 163 * <li>If an activity is completely obscured by another activity, 164 * it is <em>stopped</em>. It still retains all state and member information, 165 * however, it is no longer visible to the user so its window is hidden 166 * and it will often be killed by the system when memory is needed 167 * elsewhere.</li> 168 * <li>If an activity is paused or stopped, the system can drop the activity 169 * from memory by either asking it to finish, or simply killing its 170 * process. When it is displayed again to the user, it must be 171 * completely restarted and restored to its previous state.</li> 172 * </ul> 173 * 174 * <p>The following diagram shows the important state paths of an Activity. 175 * The square rectangles represent callback methods you can implement to 176 * perform operations when the Activity moves between states. The colored 177 * ovals are major states the Activity can be in.</p> 178 * 179 * <p><img src="../../../images/activity_lifecycle.png" 180 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 181 * 182 * <p>There are three key loops you may be interested in monitoring within your 183 * activity: 184 * 185 * <ul> 186 * <li>The <b>entire lifetime</b> of an activity happens between the first call 187 * to {@link android.app.Activity#onCreate} through to a single final call 188 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 189 * of "global" state in onCreate(), and release all remaining resources in 190 * onDestroy(). For example, if it has a thread running in the background 191 * to download data from the network, it may create that thread in onCreate() 192 * and then stop the thread in onDestroy(). 193 * 194 * <li>The <b>visible lifetime</b> of an activity happens between a call to 195 * {@link android.app.Activity#onStart} until a corresponding call to 196 * {@link android.app.Activity#onStop}. During this time the user can see the 197 * activity on-screen, though it may not be in the foreground and interacting 198 * with the user. Between these two methods you can maintain resources that 199 * are needed to show the activity to the user. For example, you can register 200 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 201 * that impact your UI, and unregister it in onStop() when the user an no 202 * longer see what you are displaying. The onStart() and onStop() methods 203 * can be called multiple times, as the activity becomes visible and hidden 204 * to the user. 205 * 206 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 207 * {@link android.app.Activity#onResume} until a corresponding call to 208 * {@link android.app.Activity#onPause}. During this time the activity is 209 * in front of all other activities and interacting with the user. An activity 210 * can frequently go between the resumed and paused states -- for example when 211 * the device goes to sleep, when an activity result is delivered, when a new 212 * intent is delivered -- so the code in these methods should be fairly 213 * lightweight. 214 * </ul> 215 * 216 * <p>The entire lifecycle of an activity is defined by the following 217 * Activity methods. All of these are hooks that you can override 218 * to do appropriate work when the activity changes state. All 219 * activities will implement {@link android.app.Activity#onCreate} 220 * to do their initial setup; many will also implement 221 * {@link android.app.Activity#onPause} to commit changes to data and 222 * otherwise prepare to stop interacting with the user. You should always 223 * call up to your superclass when implementing these methods.</p> 224 * 225 * </p> 226 * <pre class="prettyprint"> 227 * public class Activity extends ApplicationContext { 228 * protected void onCreate(Bundle savedInstanceState); 229 * 230 * protected void onStart(); 231 * 232 * protected void onRestart(); 233 * 234 * protected void onResume(); 235 * 236 * protected void onPause(); 237 * 238 * protected void onStop(); 239 * 240 * protected void onDestroy(); 241 * } 242 * </pre> 243 * 244 * <p>In general the movement through an activity's lifecycle looks like 245 * this:</p> 246 * 247 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 248 * <colgroup align="left" span="3" /> 249 * <colgroup align="left" /> 250 * <colgroup align="center" /> 251 * <colgroup align="center" /> 252 * 253 * <thead> 254 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 255 * </thead> 256 * 257 * <tbody> 258 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 259 * <td>Called when the activity is first created. 260 * This is where you should do all of your normal static set up: 261 * create views, bind data to lists, etc. This method also 262 * provides you with a Bundle containing the activity's previously 263 * frozen state, if there was one. 264 * <p>Always followed by <code>onStart()</code>.</td> 265 * <td align="center">No</td> 266 * <td align="center"><code>onStart()</code></td> 267 * </tr> 268 * 269 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 270 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 271 * <td>Called after your activity has been stopped, prior to it being 272 * started again. 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><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 279 * <td>Called when the activity is becoming visible to the user. 280 * <p>Followed by <code>onResume()</code> if the activity comes 281 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 282 * <td align="center">No</td> 283 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 284 * </tr> 285 * 286 * <tr><td rowspan="2" style="border-left: none;"> </td> 287 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 288 * <td>Called when the activity will start 289 * interacting with the user. At this point your activity is at 290 * the top of the activity stack, with user input going to it. 291 * <p>Always followed by <code>onPause()</code>.</td> 292 * <td align="center">No</td> 293 * <td align="center"><code>onPause()</code></td> 294 * </tr> 295 * 296 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 297 * <td>Called when the system is about to start resuming a previous 298 * activity. This is typically used to commit unsaved changes to 299 * persistent data, stop animations and other things that may be consuming 300 * CPU, etc. Implementations of this method must be very quick because 301 * the next activity will not be resumed until this method returns. 302 * <p>Followed by either <code>onResume()</code> if the activity 303 * returns back to the front, or <code>onStop()</code> if it becomes 304 * invisible to the user.</td> 305 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 306 * <td align="center"><code>onResume()</code> or<br> 307 * <code>onStop()</code></td> 308 * </tr> 309 * 310 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 311 * <td>Called when the activity is no longer visible to the user, because 312 * another activity has been resumed and is covering this one. This 313 * may happen either because a new activity is being started, an existing 314 * one is being brought in front of this one, or this one is being 315 * destroyed. 316 * <p>Followed by either <code>onRestart()</code> if 317 * this activity is coming back to interact with the user, or 318 * <code>onDestroy()</code> if this activity is going away.</td> 319 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 320 * <td align="center"><code>onRestart()</code> or<br> 321 * <code>onDestroy()</code></td> 322 * </tr> 323 * 324 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 325 * <td>The final call you receive before your 326 * activity is destroyed. This can happen either because the 327 * activity is finishing (someone called {@link Activity#finish} on 328 * it, or because the system is temporarily destroying this 329 * instance of the activity to save space. You can distinguish 330 * between these two scenarios with the {@link 331 * Activity#isFinishing} method.</td> 332 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 333 * <td align="center"><em>nothing</em></td> 334 * </tr> 335 * </tbody> 336 * </table> 337 * 338 * <p>Note the "Killable" column in the above table -- for those methods that 339 * are marked as being killable, after that method returns the process hosting the 340 * activity may killed by the system <em>at any time</em> without another line 341 * of its code being executed. Because of this, you should use the 342 * {@link #onPause} method to write any persistent data (such as user edits) 343 * to storage. In addition, the method 344 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 345 * in such a background state, allowing you to save away any dynamic instance 346 * state in your activity into the given Bundle, to be later received in 347 * {@link #onCreate} if the activity needs to be re-created. 348 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 349 * section for more information on how the lifecycle of a process is tied 350 * to the activities it is hosting. Note that it is important to save 351 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 352 * because the latter is not part of the lifecycle callbacks, so will not 353 * be called in every situation as described in its documentation.</p> 354 * 355 * <p class="note">Be aware that these semantics will change slightly between 356 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 357 * vs. those targeting prior platforms. Starting with Honeycomb, an application 358 * is not in the killable state until its {@link #onStop} has returned. This 359 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 360 * safely called after {@link #onPause()} and allows and application to safely 361 * wait until {@link #onStop()} to save persistent state.</p> 362 * 363 * <p>For those methods that are not marked as being killable, the activity's 364 * process will not be killed by the system starting from the time the method 365 * is called and continuing after it returns. Thus an activity is in the killable 366 * state, for example, between after <code>onPause()</code> to the start of 367 * <code>onResume()</code>.</p> 368 * 369 * <a name="ConfigurationChanges"></a> 370 * <h3>Configuration Changes</h3> 371 * 372 * <p>If the configuration of the device (as defined by the 373 * {@link Configuration Resources.Configuration} class) changes, 374 * then anything displaying a user interface will need to update to match that 375 * configuration. Because Activity is the primary mechanism for interacting 376 * with the user, it includes special support for handling configuration 377 * changes.</p> 378 * 379 * <p>Unless you specify otherwise, a configuration change (such as a change 380 * in screen orientation, language, input devices, etc) will cause your 381 * current activity to be <em>destroyed</em>, going through the normal activity 382 * lifecycle process of {@link #onPause}, 383 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 384 * had been in the foreground or visible to the user, once {@link #onDestroy} is 385 * called in that instance then a new instance of the activity will be 386 * created, with whatever savedInstanceState the previous instance had generated 387 * from {@link #onSaveInstanceState}.</p> 388 * 389 * <p>This is done because any application resource, 390 * including layout files, can change based on any configuration value. Thus 391 * the only safe way to handle a configuration change is to re-retrieve all 392 * resources, including layouts, drawables, and strings. Because activities 393 * must already know how to save their state and re-create themselves from 394 * that state, this is a convenient way to have an activity restart itself 395 * with a new configuration.</p> 396 * 397 * <p>In some special cases, you may want to bypass restarting of your 398 * activity based on one or more types of configuration changes. This is 399 * done with the {@link android.R.attr#configChanges android:configChanges} 400 * attribute in its manifest. For any types of configuration changes you say 401 * that you handle there, you will receive a call to your current activity's 402 * {@link #onConfigurationChanged} method instead of being restarted. If 403 * a configuration change involves any that you do not handle, however, the 404 * activity will still be restarted and {@link #onConfigurationChanged} 405 * will not be called.</p> 406 * 407 * <a name="StartingActivities"></a> 408 * <h3>Starting Activities and Getting Results</h3> 409 * 410 * <p>The {@link android.app.Activity#startActivity} 411 * method is used to start a 412 * new activity, which will be placed at the top of the activity stack. It 413 * takes a single argument, an {@link android.content.Intent Intent}, 414 * which describes the activity 415 * to be executed.</p> 416 * 417 * <p>Sometimes you want to get a result back from an activity when it 418 * ends. For example, you may start an activity that lets the user pick 419 * a person in a list of contacts; when it ends, it returns the person 420 * that was selected. To do this, you call the 421 * {@link android.app.Activity#startActivityForResult(Intent, int)} 422 * version with a second integer parameter identifying the call. The result 423 * will come back through your {@link android.app.Activity#onActivityResult} 424 * method.</p> 425 * 426 * <p>When an activity exits, it can call 427 * {@link android.app.Activity#setResult(int)} 428 * to return data back to its parent. It must always supply a result code, 429 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 430 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 431 * return back an Intent containing any additional data it wants. All of this 432 * information appears back on the 433 * parent's <code>Activity.onActivityResult()</code>, along with the integer 434 * identifier it originally supplied.</p> 435 * 436 * <p>If a child activity fails for any reason (such as crashing), the parent 437 * activity will receive a result with the code RESULT_CANCELED.</p> 438 * 439 * <pre class="prettyprint"> 440 * public class MyActivity extends Activity { 441 * ... 442 * 443 * static final int PICK_CONTACT_REQUEST = 0; 444 * 445 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 446 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 447 * // When the user center presses, let them pick a contact. 448 * startActivityForResult( 449 * new Intent(Intent.ACTION_PICK, 450 * new Uri("content://contacts")), 451 * PICK_CONTACT_REQUEST); 452 * return true; 453 * } 454 * return false; 455 * } 456 * 457 * protected void onActivityResult(int requestCode, int resultCode, 458 * Intent data) { 459 * if (requestCode == PICK_CONTACT_REQUEST) { 460 * if (resultCode == RESULT_OK) { 461 * // A contact was picked. Here we will just display it 462 * // to the user. 463 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 464 * } 465 * } 466 * } 467 * } 468 * </pre> 469 * 470 * <a name="SavingPersistentState"></a> 471 * <h3>Saving Persistent State</h3> 472 * 473 * <p>There are generally two kinds of persistent state than an activity 474 * will deal with: shared document-like data (typically stored in a SQLite 475 * database using a {@linkplain android.content.ContentProvider content provider}) 476 * and internal state such as user preferences.</p> 477 * 478 * <p>For content provider data, we suggest that activities use a 479 * "edit in place" user model. That is, any edits a user makes are effectively 480 * made immediately without requiring an additional confirmation step. 481 * Supporting this model is generally a simple matter of following two rules:</p> 482 * 483 * <ul> 484 * <li> <p>When creating a new document, the backing database entry or file for 485 * it is created immediately. For example, if the user chooses to write 486 * a new e-mail, a new entry for that e-mail is created as soon as they 487 * start entering data, so that if they go to any other activity after 488 * that point this e-mail will now appear in the list of drafts.</p> 489 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 490 * commit to the backing content provider or file any changes the user 491 * has made. This ensures that those changes will be seen by any other 492 * activity that is about to run. You will probably want to commit 493 * your data even more aggressively at key times during your 494 * activity's lifecycle: for example before starting a new 495 * activity, before finishing your own activity, when the user 496 * switches between input fields, etc.</p> 497 * </ul> 498 * 499 * <p>This model is designed to prevent data loss when a user is navigating 500 * between activities, and allows the system to safely kill an activity (because 501 * system resources are needed somewhere else) at any time after it has been 502 * paused. Note this implies 503 * that the user pressing BACK from your activity does <em>not</em> 504 * mean "cancel" -- it means to leave the activity with its current contents 505 * saved away. Canceling edits in an activity must be provided through 506 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 507 * 508 * <p>See the {@linkplain android.content.ContentProvider content package} for 509 * more information about content providers. These are a key aspect of how 510 * different activities invoke and propagate data between themselves.</p> 511 * 512 * <p>The Activity class also provides an API for managing internal persistent state 513 * associated with an activity. This can be used, for example, to remember 514 * the user's preferred initial display in a calendar (day view or week view) 515 * or the user's default home page in a web browser.</p> 516 * 517 * <p>Activity persistent state is managed 518 * with the method {@link #getPreferences}, 519 * allowing you to retrieve and 520 * modify a set of name/value pairs associated with the activity. To use 521 * preferences that are shared across multiple application components 522 * (activities, receivers, services, providers), you can use the underlying 523 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 524 * to retrieve a preferences 525 * object stored under a specific name. 526 * (Note that it is not possible to share settings data across application 527 * packages -- for that you will need a content provider.)</p> 528 * 529 * <p>Here is an excerpt from a calendar activity that stores the user's 530 * preferred view mode in its persistent settings:</p> 531 * 532 * <pre class="prettyprint"> 533 * public class CalendarActivity extends Activity { 534 * ... 535 * 536 * static final int DAY_VIEW_MODE = 0; 537 * static final int WEEK_VIEW_MODE = 1; 538 * 539 * private SharedPreferences mPrefs; 540 * private int mCurViewMode; 541 * 542 * protected void onCreate(Bundle savedInstanceState) { 543 * super.onCreate(savedInstanceState); 544 * 545 * SharedPreferences mPrefs = getSharedPreferences(); 546 * mCurViewMode = mPrefs.getInt("view_mode" DAY_VIEW_MODE); 547 * } 548 * 549 * protected void onPause() { 550 * super.onPause(); 551 * 552 * SharedPreferences.Editor ed = mPrefs.edit(); 553 * ed.putInt("view_mode", mCurViewMode); 554 * ed.commit(); 555 * } 556 * } 557 * </pre> 558 * 559 * <a name="Permissions"></a> 560 * <h3>Permissions</h3> 561 * 562 * <p>The ability to start a particular Activity can be enforced when it is 563 * declared in its 564 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 565 * tag. By doing so, other applications will need to declare a corresponding 566 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 567 * element in their own manifest to be able to start that activity. 568 * 569 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 570 * document for more information on permissions and security in general. 571 * 572 * <a name="ProcessLifecycle"></a> 573 * <h3>Process Lifecycle</h3> 574 * 575 * <p>The Android system attempts to keep application process around for as 576 * long as possible, but eventually will need to remove old processes when 577 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 578 * Lifecycle</a>, the decision about which process to remove is intimately 579 * tied to the state of the user's interaction with it. In general, there 580 * are four states a process can be in based on the activities running in it, 581 * listed here in order of importance. The system will kill less important 582 * processes (the last ones) before it resorts to killing more important 583 * processes (the first ones). 584 * 585 * <ol> 586 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 587 * that the user is currently interacting with) is considered the most important. 588 * Its process will only be killed as a last resort, if it uses more memory 589 * than is available on the device. Generally at this point the device has 590 * reached a memory paging state, so this is required in order to keep the user 591 * interface responsive. 592 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 593 * but not in the foreground, such as one sitting behind a foreground dialog) 594 * is considered extremely important and will not be killed unless that is 595 * required to keep the foreground activity running. 596 * <li> <p>A <b>background activity</b> (an activity that is not visible to 597 * the user and has been paused) is no longer critical, so the system may 598 * safely kill its process to reclaim memory for other foreground or 599 * visible processes. If its process needs to be killed, when the user navigates 600 * back to the activity (making it visible on the screen again), its 601 * {@link #onCreate} method will be called with the savedInstanceState it had previously 602 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 603 * state as the user last left it. 604 * <li> <p>An <b>empty process</b> is one hosting no activities or other 605 * application components (such as {@link Service} or 606 * {@link android.content.BroadcastReceiver} classes). These are killed very 607 * quickly by the system as memory becomes low. For this reason, any 608 * background operation you do outside of an activity must be executed in the 609 * context of an activity BroadcastReceiver or Service to ensure that the system 610 * knows it needs to keep your process around. 611 * </ol> 612 * 613 * <p>Sometimes an Activity may need to do a long-running operation that exists 614 * independently of the activity lifecycle itself. An example may be a camera 615 * application that allows you to upload a picture to a web site. The upload 616 * may take a long time, and the application should allow the user to leave 617 * the application will it is executing. To accomplish this, your Activity 618 * should start a {@link Service} in which the upload takes place. This allows 619 * the system to properly prioritize your process (considering it to be more 620 * important than other non-visible applications) for the duration of the 621 * upload, independent of whether the original activity is paused, stopped, 622 * or finished. 623 */ 624public class Activity extends ContextThemeWrapper 625 implements LayoutInflater.Factory2, 626 Window.Callback, KeyEvent.Callback, 627 OnCreateContextMenuListener, ComponentCallbacks { 628 private static final String TAG = "Activity"; 629 630 /** Standard activity result: operation canceled. */ 631 public static final int RESULT_CANCELED = 0; 632 /** Standard activity result: operation succeeded. */ 633 public static final int RESULT_OK = -1; 634 /** Start of user-defined activity results. */ 635 public static final int RESULT_FIRST_USER = 1; 636 637 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 638 private static final String FRAGMENTS_TAG = "android:fragments"; 639 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 640 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 641 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 642 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 643 644 private static class ManagedDialog { 645 Dialog mDialog; 646 Bundle mArgs; 647 } 648 private SparseArray<ManagedDialog> mManagedDialogs; 649 650 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 651 private Instrumentation mInstrumentation; 652 private IBinder mToken; 653 private int mIdent; 654 /*package*/ String mEmbeddedID; 655 private Application mApplication; 656 /*package*/ Intent mIntent; 657 private ComponentName mComponent; 658 /*package*/ ActivityInfo mActivityInfo; 659 /*package*/ ActivityThread mMainThread; 660 Activity mParent; 661 boolean mCalled; 662 boolean mCheckedForLoaderManager; 663 boolean mLoadersStarted; 664 /*package*/ boolean mResumed; 665 private boolean mStopped; 666 boolean mFinished; 667 boolean mStartedActivity; 668 /** true if the activity is going through a transient pause */ 669 /*package*/ boolean mTemporaryPause = false; 670 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 671 /*package*/ boolean mChangingConfigurations = false; 672 /*package*/ int mConfigChangeFlags; 673 /*package*/ Configuration mCurrentConfig; 674 private SearchManager mSearchManager; 675 676 static final class NonConfigurationInstances { 677 Object activity; 678 HashMap<String, Object> children; 679 ArrayList<Fragment> fragments; 680 SparseArray<LoaderManagerImpl> loaders; 681 } 682 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 683 684 private Window mWindow; 685 686 private WindowManager mWindowManager; 687 /*package*/ View mDecor = null; 688 /*package*/ boolean mWindowAdded = false; 689 /*package*/ boolean mVisibleFromServer = false; 690 /*package*/ boolean mVisibleFromClient = true; 691 /*package*/ ActionBarImpl mActionBar = null; 692 693 private CharSequence mTitle; 694 private int mTitleColor = 0; 695 696 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 697 698 SparseArray<LoaderManagerImpl> mAllLoaderManagers; 699 LoaderManagerImpl mLoaderManager; 700 701 private static final class ManagedCursor { 702 ManagedCursor(Cursor cursor) { 703 mCursor = cursor; 704 mReleased = false; 705 mUpdated = false; 706 } 707 708 private final Cursor mCursor; 709 private boolean mReleased; 710 private boolean mUpdated; 711 } 712 private final ArrayList<ManagedCursor> mManagedCursors = 713 new ArrayList<ManagedCursor>(); 714 715 // protected by synchronized (this) 716 int mResultCode = RESULT_CANCELED; 717 Intent mResultData = null; 718 719 private boolean mTitleReady = false; 720 721 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 722 private SpannableStringBuilder mDefaultKeySsb = null; 723 724 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 725 726 private Thread mUiThread; 727 final Handler mHandler = new Handler(); 728 729 /** Return the intent that started this activity. */ 730 public Intent getIntent() { 731 return mIntent; 732 } 733 734 /** 735 * Change the intent returned by {@link #getIntent}. This holds a 736 * reference to the given intent; it does not copy it. Often used in 737 * conjunction with {@link #onNewIntent}. 738 * 739 * @param newIntent The new Intent object to return from getIntent 740 * 741 * @see #getIntent 742 * @see #onNewIntent 743 */ 744 public void setIntent(Intent newIntent) { 745 mIntent = newIntent; 746 } 747 748 /** Return the application that owns this activity. */ 749 public final Application getApplication() { 750 return mApplication; 751 } 752 753 /** Is this activity embedded inside of another activity? */ 754 public final boolean isChild() { 755 return mParent != null; 756 } 757 758 /** Return the parent activity if this view is an embedded child. */ 759 public final Activity getParent() { 760 return mParent; 761 } 762 763 /** Retrieve the window manager for showing custom windows. */ 764 public WindowManager getWindowManager() { 765 return mWindowManager; 766 } 767 768 /** 769 * Retrieve the current {@link android.view.Window} for the activity. 770 * This can be used to directly access parts of the Window API that 771 * are not available through Activity/Screen. 772 * 773 * @return Window The current window, or null if the activity is not 774 * visual. 775 */ 776 public Window getWindow() { 777 return mWindow; 778 } 779 780 /** 781 * Return the LoaderManager for this fragment, creating it if needed. 782 */ 783 public LoaderManager getLoaderManager() { 784 if (mLoaderManager != null) { 785 return mLoaderManager; 786 } 787 mCheckedForLoaderManager = true; 788 mLoaderManager = getLoaderManager(-1, mLoadersStarted, true); 789 return mLoaderManager; 790 } 791 792 LoaderManagerImpl getLoaderManager(int index, boolean started, boolean create) { 793 if (mAllLoaderManagers == null) { 794 mAllLoaderManagers = new SparseArray<LoaderManagerImpl>(); 795 } 796 LoaderManagerImpl lm = mAllLoaderManagers.get(index); 797 if (lm == null) { 798 if (create) { 799 lm = new LoaderManagerImpl(this, started); 800 mAllLoaderManagers.put(index, lm); 801 } 802 } else { 803 lm.updateActivity(this); 804 } 805 return lm; 806 } 807 808 /** 809 * Calls {@link android.view.Window#getCurrentFocus} on the 810 * Window of this Activity to return the currently focused view. 811 * 812 * @return View The current View with focus or null. 813 * 814 * @see #getWindow 815 * @see android.view.Window#getCurrentFocus 816 */ 817 public View getCurrentFocus() { 818 return mWindow != null ? mWindow.getCurrentFocus() : null; 819 } 820 821 /** 822 * Called when the activity is starting. This is where most initialization 823 * should go: calling {@link #setContentView(int)} to inflate the 824 * activity's UI, using {@link #findViewById} to programmatically interact 825 * with widgets in the UI, calling 826 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 827 * cursors for data being displayed, etc. 828 * 829 * <p>You can call {@link #finish} from within this function, in 830 * which case onDestroy() will be immediately called without any of the rest 831 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 832 * {@link #onPause}, etc) executing. 833 * 834 * <p><em>Derived classes must call through to the super class's 835 * implementation of this method. If they do not, an exception will be 836 * thrown.</em></p> 837 * 838 * @param savedInstanceState If the activity is being re-initialized after 839 * previously being shut down then this Bundle contains the data it most 840 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 841 * 842 * @see #onStart 843 * @see #onSaveInstanceState 844 * @see #onRestoreInstanceState 845 * @see #onPostCreate 846 */ 847 protected void onCreate(Bundle savedInstanceState) { 848 if (mLastNonConfigurationInstances != null) { 849 mAllLoaderManagers = mLastNonConfigurationInstances.loaders; 850 } 851 if (savedInstanceState != null) { 852 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 853 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 854 ? mLastNonConfigurationInstances.fragments : null); 855 } 856 mFragments.dispatchCreate(); 857 mCalled = true; 858 } 859 860 /** 861 * The hook for {@link ActivityThread} to restore the state of this activity. 862 * 863 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 864 * {@link #restoreManagedDialogs(android.os.Bundle)}. 865 * 866 * @param savedInstanceState contains the saved state 867 */ 868 final void performRestoreInstanceState(Bundle savedInstanceState) { 869 onRestoreInstanceState(savedInstanceState); 870 restoreManagedDialogs(savedInstanceState); 871 } 872 873 /** 874 * This method is called after {@link #onStart} when the activity is 875 * being re-initialized from a previously saved state, given here in 876 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 877 * to restore their state, but it is sometimes convenient to do it here 878 * after all of the initialization has been done or to allow subclasses to 879 * decide whether to use your default implementation. The default 880 * implementation of this method performs a restore of any view state that 881 * had previously been frozen by {@link #onSaveInstanceState}. 882 * 883 * <p>This method is called between {@link #onStart} and 884 * {@link #onPostCreate}. 885 * 886 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 887 * 888 * @see #onCreate 889 * @see #onPostCreate 890 * @see #onResume 891 * @see #onSaveInstanceState 892 */ 893 protected void onRestoreInstanceState(Bundle savedInstanceState) { 894 if (mWindow != null) { 895 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 896 if (windowState != null) { 897 mWindow.restoreHierarchyState(windowState); 898 } 899 } 900 } 901 902 /** 903 * Restore the state of any saved managed dialogs. 904 * 905 * @param savedInstanceState The bundle to restore from. 906 */ 907 private void restoreManagedDialogs(Bundle savedInstanceState) { 908 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 909 if (b == null) { 910 return; 911 } 912 913 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 914 final int numDialogs = ids.length; 915 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 916 for (int i = 0; i < numDialogs; i++) { 917 final Integer dialogId = ids[i]; 918 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 919 if (dialogState != null) { 920 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 921 // so tell createDialog() not to do it, otherwise we get an exception 922 final ManagedDialog md = new ManagedDialog(); 923 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 924 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 925 if (md.mDialog != null) { 926 mManagedDialogs.put(dialogId, md); 927 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 928 md.mDialog.onRestoreInstanceState(dialogState); 929 } 930 } 931 } 932 } 933 934 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 935 final Dialog dialog = onCreateDialog(dialogId, args); 936 if (dialog == null) { 937 return null; 938 } 939 dialog.dispatchOnCreate(state); 940 return dialog; 941 } 942 943 private static String savedDialogKeyFor(int key) { 944 return SAVED_DIALOG_KEY_PREFIX + key; 945 } 946 947 private static String savedDialogArgsKeyFor(int key) { 948 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 949 } 950 951 /** 952 * Called when activity start-up is complete (after {@link #onStart} 953 * and {@link #onRestoreInstanceState} have been called). Applications will 954 * generally not implement this method; it is intended for system 955 * classes to do final initialization after application code has run. 956 * 957 * <p><em>Derived classes must call through to the super class's 958 * implementation of this method. If they do not, an exception will be 959 * thrown.</em></p> 960 * 961 * @param savedInstanceState If the activity is being re-initialized after 962 * previously being shut down then this Bundle contains the data it most 963 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 964 * @see #onCreate 965 */ 966 protected void onPostCreate(Bundle savedInstanceState) { 967 if (!isChild()) { 968 mTitleReady = true; 969 onTitleChanged(getTitle(), getTitleColor()); 970 } 971 mCalled = true; 972 } 973 974 /** 975 * Called after {@link #onCreate} — or after {@link #onRestart} when 976 * the activity had been stopped, but is now again being displayed to the 977 * user. It will be followed by {@link #onResume}. 978 * 979 * <p><em>Derived classes must call through to the super class's 980 * implementation of this method. If they do not, an exception will be 981 * thrown.</em></p> 982 * 983 * @see #onCreate 984 * @see #onStop 985 * @see #onResume 986 */ 987 protected void onStart() { 988 mCalled = true; 989 990 if (!mLoadersStarted) { 991 mLoadersStarted = true; 992 if (mLoaderManager != null) { 993 mLoaderManager.doStart(); 994 } else if (!mCheckedForLoaderManager) { 995 mLoaderManager = getLoaderManager(-1, mLoadersStarted, false); 996 } 997 mCheckedForLoaderManager = true; 998 } 999 } 1000 1001 /** 1002 * Called after {@link #onStop} when the current activity is being 1003 * re-displayed to the user (the user has navigated back to it). It will 1004 * be followed by {@link #onStart} and then {@link #onResume}. 1005 * 1006 * <p>For activities that are using raw {@link Cursor} objects (instead of 1007 * creating them through 1008 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1009 * this is usually the place 1010 * where the cursor should be requeried (because you had deactivated it in 1011 * {@link #onStop}. 1012 * 1013 * <p><em>Derived classes must call through to the super class's 1014 * implementation of this method. If they do not, an exception will be 1015 * thrown.</em></p> 1016 * 1017 * @see #onStop 1018 * @see #onStart 1019 * @see #onResume 1020 */ 1021 protected void onRestart() { 1022 mCalled = true; 1023 } 1024 1025 /** 1026 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1027 * {@link #onPause}, for your activity to start interacting with the user. 1028 * This is a good place to begin animations, open exclusive-access devices 1029 * (such as the camera), etc. 1030 * 1031 * <p>Keep in mind that onResume is not the best indicator that your activity 1032 * is visible to the user; a system window such as the keyguard may be in 1033 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1034 * activity is visible to the user (for example, to resume a game). 1035 * 1036 * <p><em>Derived classes must call through to the super class's 1037 * implementation of this method. If they do not, an exception will be 1038 * thrown.</em></p> 1039 * 1040 * @see #onRestoreInstanceState 1041 * @see #onRestart 1042 * @see #onPostResume 1043 * @see #onPause 1044 */ 1045 protected void onResume() { 1046 mCalled = true; 1047 } 1048 1049 /** 1050 * Called when activity resume is complete (after {@link #onResume} has 1051 * been called). Applications will generally not implement this method; 1052 * it is intended for system classes to do final setup after application 1053 * resume code has run. 1054 * 1055 * <p><em>Derived classes must call through to the super class's 1056 * implementation of this method. If they do not, an exception will be 1057 * thrown.</em></p> 1058 * 1059 * @see #onResume 1060 */ 1061 protected void onPostResume() { 1062 final Window win = getWindow(); 1063 if (win != null) win.makeActive(); 1064 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1065 mCalled = true; 1066 } 1067 1068 /** 1069 * This is called for activities that set launchMode to "singleTop" in 1070 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1071 * flag when calling {@link #startActivity}. In either case, when the 1072 * activity is re-launched while at the top of the activity stack instead 1073 * of a new instance of the activity being started, onNewIntent() will be 1074 * called on the existing instance with the Intent that was used to 1075 * re-launch it. 1076 * 1077 * <p>An activity will always be paused before receiving a new intent, so 1078 * you can count on {@link #onResume} being called after this method. 1079 * 1080 * <p>Note that {@link #getIntent} still returns the original Intent. You 1081 * can use {@link #setIntent} to update it to this new Intent. 1082 * 1083 * @param intent The new intent that was started for the activity. 1084 * 1085 * @see #getIntent 1086 * @see #setIntent 1087 * @see #onResume 1088 */ 1089 protected void onNewIntent(Intent intent) { 1090 } 1091 1092 /** 1093 * The hook for {@link ActivityThread} to save the state of this activity. 1094 * 1095 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1096 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1097 * 1098 * @param outState The bundle to save the state to. 1099 */ 1100 final void performSaveInstanceState(Bundle outState) { 1101 onSaveInstanceState(outState); 1102 saveManagedDialogs(outState); 1103 } 1104 1105 /** 1106 * Called to retrieve per-instance state from an activity before being killed 1107 * so that the state can be restored in {@link #onCreate} or 1108 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1109 * will be passed to both). 1110 * 1111 * <p>This method is called before an activity may be killed so that when it 1112 * comes back some time in the future it can restore its state. For example, 1113 * if activity B is launched in front of activity A, and at some point activity 1114 * A is killed to reclaim resources, activity A will have a chance to save the 1115 * current state of its user interface via this method so that when the user 1116 * returns to activity A, the state of the user interface can be restored 1117 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1118 * 1119 * <p>Do not confuse this method with activity lifecycle callbacks such as 1120 * {@link #onPause}, which is always called when an activity is being placed 1121 * in the background or on its way to destruction, or {@link #onStop} which 1122 * is called before destruction. One example of when {@link #onPause} and 1123 * {@link #onStop} is called and not this method is when a user navigates back 1124 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1125 * on B because that particular instance will never be restored, so the 1126 * system avoids calling it. An example when {@link #onPause} is called and 1127 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1128 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1129 * killed during the lifetime of B since the state of the user interface of 1130 * A will stay intact. 1131 * 1132 * <p>The default implementation takes care of most of the UI per-instance 1133 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1134 * view in the hierarchy that has an id, and by saving the id of the currently 1135 * focused view (all of which is restored by the default implementation of 1136 * {@link #onRestoreInstanceState}). If you override this method to save additional 1137 * information not captured by each individual view, you will likely want to 1138 * call through to the default implementation, otherwise be prepared to save 1139 * all of the state of each view yourself. 1140 * 1141 * <p>If called, this method will occur before {@link #onStop}. There are 1142 * no guarantees about whether it will occur before or after {@link #onPause}. 1143 * 1144 * @param outState Bundle in which to place your saved state. 1145 * 1146 * @see #onCreate 1147 * @see #onRestoreInstanceState 1148 * @see #onPause 1149 */ 1150 protected void onSaveInstanceState(Bundle outState) { 1151 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1152 Parcelable p = mFragments.saveAllState(); 1153 if (p != null) { 1154 outState.putParcelable(FRAGMENTS_TAG, p); 1155 } 1156 } 1157 1158 /** 1159 * Save the state of any managed dialogs. 1160 * 1161 * @param outState place to store the saved state. 1162 */ 1163 private void saveManagedDialogs(Bundle outState) { 1164 if (mManagedDialogs == null) { 1165 return; 1166 } 1167 1168 final int numDialogs = mManagedDialogs.size(); 1169 if (numDialogs == 0) { 1170 return; 1171 } 1172 1173 Bundle dialogState = new Bundle(); 1174 1175 int[] ids = new int[mManagedDialogs.size()]; 1176 1177 // save each dialog's bundle, gather the ids 1178 for (int i = 0; i < numDialogs; i++) { 1179 final int key = mManagedDialogs.keyAt(i); 1180 ids[i] = key; 1181 final ManagedDialog md = mManagedDialogs.valueAt(i); 1182 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1183 if (md.mArgs != null) { 1184 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1185 } 1186 } 1187 1188 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1189 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1190 } 1191 1192 1193 /** 1194 * Called as part of the activity lifecycle when an activity is going into 1195 * the background, but has not (yet) been killed. The counterpart to 1196 * {@link #onResume}. 1197 * 1198 * <p>When activity B is launched in front of activity A, this callback will 1199 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1200 * so be sure to not do anything lengthy here. 1201 * 1202 * <p>This callback is mostly used for saving any persistent state the 1203 * activity is editing, to present a "edit in place" model to the user and 1204 * making sure nothing is lost if there are not enough resources to start 1205 * the new activity without first killing this one. This is also a good 1206 * place to do things like stop animations and other things that consume a 1207 * noticeable mount of CPU in order to make the switch to the next activity 1208 * as fast as possible, or to close resources that are exclusive access 1209 * such as the camera. 1210 * 1211 * <p>In situations where the system needs more memory it may kill paused 1212 * processes to reclaim resources. Because of this, you should be sure 1213 * that all of your state is saved by the time you return from 1214 * this function. In general {@link #onSaveInstanceState} is used to save 1215 * per-instance state in the activity and this method is used to store 1216 * global persistent data (in content providers, files, etc.) 1217 * 1218 * <p>After receiving this call you will usually receive a following call 1219 * to {@link #onStop} (after the next activity has been resumed and 1220 * displayed), however in some cases there will be a direct call back to 1221 * {@link #onResume} without going through the stopped state. 1222 * 1223 * <p><em>Derived classes must call through to the super class's 1224 * implementation of this method. If they do not, an exception will be 1225 * thrown.</em></p> 1226 * 1227 * @see #onResume 1228 * @see #onSaveInstanceState 1229 * @see #onStop 1230 */ 1231 protected void onPause() { 1232 mCalled = true; 1233 } 1234 1235 /** 1236 * Called as part of the activity lifecycle when an activity is about to go 1237 * into the background as the result of user choice. For example, when the 1238 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1239 * when an incoming phone call causes the in-call Activity to be automatically 1240 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1241 * the activity being interrupted. In cases when it is invoked, this method 1242 * is called right before the activity's {@link #onPause} callback. 1243 * 1244 * <p>This callback and {@link #onUserInteraction} are intended to help 1245 * activities manage status bar notifications intelligently; specifically, 1246 * for helping activities determine the proper time to cancel a notfication. 1247 * 1248 * @see #onUserInteraction() 1249 */ 1250 protected void onUserLeaveHint() { 1251 } 1252 1253 /** 1254 * Generate a new thumbnail for this activity. This method is called before 1255 * pausing the activity, and should draw into <var>outBitmap</var> the 1256 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1257 * can use the given <var>canvas</var>, which is configured to draw into the 1258 * bitmap, for rendering if desired. 1259 * 1260 * <p>The default implementation returns fails and does not draw a thumbnail; 1261 * this will result in the platform creating its own thumbnail if needed. 1262 * 1263 * @param outBitmap The bitmap to contain the thumbnail. 1264 * @param canvas Can be used to render into the bitmap. 1265 * 1266 * @return Return true if you have drawn into the bitmap; otherwise after 1267 * you return it will be filled with a default thumbnail. 1268 * 1269 * @see #onCreateDescription 1270 * @see #onSaveInstanceState 1271 * @see #onPause 1272 */ 1273 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1274 return false; 1275 } 1276 1277 /** 1278 * Generate a new description for this activity. This method is called 1279 * before pausing the activity and can, if desired, return some textual 1280 * description of its current state to be displayed to the user. 1281 * 1282 * <p>The default implementation returns null, which will cause you to 1283 * inherit the description from the previous activity. If all activities 1284 * return null, generally the label of the top activity will be used as the 1285 * description. 1286 * 1287 * @return A description of what the user is doing. It should be short and 1288 * sweet (only a few words). 1289 * 1290 * @see #onCreateThumbnail 1291 * @see #onSaveInstanceState 1292 * @see #onPause 1293 */ 1294 public CharSequence onCreateDescription() { 1295 return null; 1296 } 1297 1298 /** 1299 * Called when you are no longer visible to the user. You will next 1300 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1301 * depending on later user activity. 1302 * 1303 * <p>Note that this method may never be called, in low memory situations 1304 * where the system does not have enough memory to keep your activity's 1305 * process running after its {@link #onPause} method is called. 1306 * 1307 * <p><em>Derived classes must call through to the super class's 1308 * implementation of this method. If they do not, an exception will be 1309 * thrown.</em></p> 1310 * 1311 * @see #onRestart 1312 * @see #onResume 1313 * @see #onSaveInstanceState 1314 * @see #onDestroy 1315 */ 1316 protected void onStop() { 1317 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1318 mCalled = true; 1319 } 1320 1321 /** 1322 * Perform any final cleanup before an activity is destroyed. This can 1323 * happen either because the activity is finishing (someone called 1324 * {@link #finish} on it, or because the system is temporarily destroying 1325 * this instance of the activity to save space. You can distinguish 1326 * between these two scenarios with the {@link #isFinishing} method. 1327 * 1328 * <p><em>Note: do not count on this method being called as a place for 1329 * saving data! For example, if an activity is editing data in a content 1330 * provider, those edits should be committed in either {@link #onPause} or 1331 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1332 * free resources like threads that are associated with an activity, so 1333 * that a destroyed activity does not leave such things around while the 1334 * rest of its application is still running. There are situations where 1335 * the system will simply kill the activity's hosting process without 1336 * calling this method (or any others) in it, so it should not be used to 1337 * do things that are intended to remain around after the process goes 1338 * away. 1339 * 1340 * <p><em>Derived classes must call through to the super class's 1341 * implementation of this method. If they do not, an exception will be 1342 * thrown.</em></p> 1343 * 1344 * @see #onPause 1345 * @see #onStop 1346 * @see #finish 1347 * @see #isFinishing 1348 */ 1349 protected void onDestroy() { 1350 mCalled = true; 1351 1352 // dismiss any dialogs we are managing. 1353 if (mManagedDialogs != null) { 1354 final int numDialogs = mManagedDialogs.size(); 1355 for (int i = 0; i < numDialogs; i++) { 1356 final ManagedDialog md = mManagedDialogs.valueAt(i); 1357 if (md.mDialog.isShowing()) { 1358 md.mDialog.dismiss(); 1359 } 1360 } 1361 mManagedDialogs = null; 1362 } 1363 1364 // close any cursors we are managing. 1365 synchronized (mManagedCursors) { 1366 int numCursors = mManagedCursors.size(); 1367 for (int i = 0; i < numCursors; i++) { 1368 ManagedCursor c = mManagedCursors.get(i); 1369 if (c != null) { 1370 c.mCursor.close(); 1371 } 1372 } 1373 mManagedCursors.clear(); 1374 } 1375 1376 // Close any open search dialog 1377 if (mSearchManager != null) { 1378 mSearchManager.stopSearch(); 1379 } 1380 } 1381 1382 /** 1383 * Called by the system when the device configuration changes while your 1384 * activity is running. Note that this will <em>only</em> be called if 1385 * you have selected configurations you would like to handle with the 1386 * {@link android.R.attr#configChanges} attribute in your manifest. If 1387 * any configuration change occurs that is not selected to be reported 1388 * by that attribute, then instead of reporting it the system will stop 1389 * and restart the activity (to have it launched with the new 1390 * configuration). 1391 * 1392 * <p>At the time that this function has been called, your Resources 1393 * object will have been updated to return resource values matching the 1394 * new configuration. 1395 * 1396 * @param newConfig The new device configuration. 1397 */ 1398 public void onConfigurationChanged(Configuration newConfig) { 1399 mCalled = true; 1400 1401 if (mActionBar != null) { 1402 mActionBar.onConfigurationChanged(newConfig); 1403 } 1404 1405 mFragments.dispatchConfigurationChanged(newConfig); 1406 1407 if (mWindow != null) { 1408 // Pass the configuration changed event to the window 1409 mWindow.onConfigurationChanged(newConfig); 1410 } 1411 } 1412 1413 /** 1414 * If this activity is being destroyed because it can not handle a 1415 * configuration parameter being changed (and thus its 1416 * {@link #onConfigurationChanged(Configuration)} method is 1417 * <em>not</em> being called), then you can use this method to discover 1418 * the set of changes that have occurred while in the process of being 1419 * destroyed. Note that there is no guarantee that these will be 1420 * accurate (other changes could have happened at any time), so you should 1421 * only use this as an optimization hint. 1422 * 1423 * @return Returns a bit field of the configuration parameters that are 1424 * changing, as defined by the {@link android.content.res.Configuration} 1425 * class. 1426 */ 1427 public int getChangingConfigurations() { 1428 return mConfigChangeFlags; 1429 } 1430 1431 /** 1432 * @deprecated Use the new {@link Fragment} API 1433 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1434 * available on older platforms through the Android compatibility package. 1435 * 1436 * Retrieve the non-configuration instance data that was previously 1437 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1438 * be available from the initial {@link #onCreate} and 1439 * {@link #onStart} calls to the new instance, allowing you to extract 1440 * any useful dynamic state from the previous instance. 1441 * 1442 * <p>Note that the data you retrieve here should <em>only</em> be used 1443 * as an optimization for handling configuration changes. You should always 1444 * be able to handle getting a null pointer back, and an activity must 1445 * still be able to restore itself to its previous state (through the 1446 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1447 * function returns null. 1448 * 1449 * @return Returns the object previously returned by 1450 * {@link #onRetainNonConfigurationInstance()}. 1451 */ 1452 @Deprecated 1453 public Object getLastNonConfigurationInstance() { 1454 return mLastNonConfigurationInstances != null 1455 ? mLastNonConfigurationInstances.activity : null; 1456 } 1457 1458 /** 1459 * @deprecated Use the new {@link Fragment} API 1460 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1461 * available on older platforms through the Android compatibility package. 1462 * 1463 * Called by the system, as part of destroying an 1464 * activity due to a configuration change, when it is known that a new 1465 * instance will immediately be created for the new configuration. You 1466 * can return any object you like here, including the activity instance 1467 * itself, which can later be retrieved by calling 1468 * {@link #getLastNonConfigurationInstance()} in the new activity 1469 * instance. 1470 * 1471 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1472 * or later, consider instead using a {@link Fragment} with 1473 * {@link Fragment#setRetainInstance(boolean) 1474 * Fragment.setRetainInstance(boolean}.</em> 1475 * 1476 * <p>This function is called purely as an optimization, and you must 1477 * not rely on it being called. When it is called, a number of guarantees 1478 * will be made to help optimize configuration switching: 1479 * <ul> 1480 * <li> The function will be called between {@link #onStop} and 1481 * {@link #onDestroy}. 1482 * <li> A new instance of the activity will <em>always</em> be immediately 1483 * created after this one's {@link #onDestroy()} is called. In particular, 1484 * <em>no</em> messages will be dispatched during this time (when the returned 1485 * object does not have an activity to be associated with). 1486 * <li> The object you return here will <em>always</em> be available from 1487 * the {@link #getLastNonConfigurationInstance()} method of the following 1488 * activity instance as described there. 1489 * </ul> 1490 * 1491 * <p>These guarantees are designed so that an activity can use this API 1492 * to propagate extensive state from the old to new activity instance, from 1493 * loaded bitmaps, to network connections, to evenly actively running 1494 * threads. Note that you should <em>not</em> propagate any data that 1495 * may change based on the configuration, including any data loaded from 1496 * resources such as strings, layouts, or drawables. 1497 * 1498 * <p>The guarantee of no message handling during the switch to the next 1499 * activity simplifies use with active objects. For example if your retained 1500 * state is an {@link android.os.AsyncTask} you are guaranteed that its 1501 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 1502 * not be called from the call here until you execute the next instance's 1503 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 1504 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 1505 * running in a separate thread.) 1506 * 1507 * @return Return any Object holding the desired state to propagate to the 1508 * next activity instance. 1509 */ 1510 public Object onRetainNonConfigurationInstance() { 1511 return null; 1512 } 1513 1514 /** 1515 * Retrieve the non-configuration instance data that was previously 1516 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1517 * be available from the initial {@link #onCreate} and 1518 * {@link #onStart} calls to the new instance, allowing you to extract 1519 * any useful dynamic state from the previous instance. 1520 * 1521 * <p>Note that the data you retrieve here should <em>only</em> be used 1522 * as an optimization for handling configuration changes. You should always 1523 * be able to handle getting a null pointer back, and an activity must 1524 * still be able to restore itself to its previous state (through the 1525 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1526 * function returns null. 1527 * 1528 * @return Returns the object previously returned by 1529 * {@link #onRetainNonConfigurationChildInstances()} 1530 */ 1531 HashMap<String, Object> getLastNonConfigurationChildInstances() { 1532 return mLastNonConfigurationInstances != null 1533 ? mLastNonConfigurationInstances.children : null; 1534 } 1535 1536 /** 1537 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1538 * it should return either a mapping from child activity id strings to arbitrary objects, 1539 * or null. This method is intended to be used by Activity framework subclasses that control a 1540 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1541 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1542 */ 1543 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1544 return null; 1545 } 1546 1547 NonConfigurationInstances retainNonConfigurationInstances() { 1548 Object activity = onRetainNonConfigurationInstance(); 1549 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 1550 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 1551 boolean retainLoaders = false; 1552 if (mAllLoaderManagers != null) { 1553 // prune out any loader managers that were already stopped and so 1554 // have nothing useful to retain. 1555 for (int i=mAllLoaderManagers.size()-1; i>=0; i--) { 1556 LoaderManagerImpl lm = mAllLoaderManagers.valueAt(i); 1557 if (lm.mRetaining) { 1558 retainLoaders = true; 1559 } else { 1560 lm.doDestroy(); 1561 mAllLoaderManagers.removeAt(i); 1562 } 1563 } 1564 } 1565 if (activity == null && children == null && fragments == null && !retainLoaders) { 1566 return null; 1567 } 1568 1569 NonConfigurationInstances nci = new NonConfigurationInstances(); 1570 nci.activity = activity; 1571 nci.children = children; 1572 nci.fragments = fragments; 1573 nci.loaders = mAllLoaderManagers; 1574 return nci; 1575 } 1576 1577 public void onLowMemory() { 1578 mCalled = true; 1579 mFragments.dispatchLowMemory(); 1580 } 1581 1582 /** 1583 * Return the FragmentManager for interacting with fragments associated 1584 * with this activity. 1585 */ 1586 public FragmentManager getFragmentManager() { 1587 return mFragments; 1588 } 1589 1590 void invalidateFragmentIndex(int index) { 1591 //Log.v(TAG, "invalidateFragmentIndex: index=" + index); 1592 if (mAllLoaderManagers != null) { 1593 LoaderManagerImpl lm = mAllLoaderManagers.get(index); 1594 if (lm != null) { 1595 lm.doDestroy(); 1596 } 1597 mAllLoaderManagers.remove(index); 1598 } 1599 } 1600 1601 /** 1602 * Called when a Fragment is being attached to this activity, immediately 1603 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 1604 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 1605 */ 1606 public void onAttachFragment(Fragment fragment) { 1607 } 1608 1609 /** 1610 * Wrapper around 1611 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1612 * that gives the resulting {@link Cursor} to call 1613 * {@link #startManagingCursor} so that the activity will manage its 1614 * lifecycle for you. 1615 * 1616 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1617 * or later, consider instead using {@link LoaderManager} instead, available 1618 * via {@link #getLoaderManager()}.</em> 1619 * 1620 * @param uri The URI of the content provider to query. 1621 * @param projection List of columns to return. 1622 * @param selection SQL WHERE clause. 1623 * @param sortOrder SQL ORDER BY clause. 1624 * 1625 * @return The Cursor that was returned by query(). 1626 * 1627 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1628 * @see #startManagingCursor 1629 * @hide 1630 * 1631 * @deprecated Use {@link CursorLoader} instead. 1632 */ 1633 @Deprecated 1634 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1635 String sortOrder) { 1636 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1637 if (c != null) { 1638 startManagingCursor(c); 1639 } 1640 return c; 1641 } 1642 1643 /** 1644 * Wrapper around 1645 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1646 * that gives the resulting {@link Cursor} to call 1647 * {@link #startManagingCursor} so that the activity will manage its 1648 * lifecycle for you. 1649 * 1650 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1651 * or later, consider instead using {@link LoaderManager} instead, available 1652 * via {@link #getLoaderManager()}.</em> 1653 * 1654 * @param uri The URI of the content provider to query. 1655 * @param projection List of columns to return. 1656 * @param selection SQL WHERE clause. 1657 * @param selectionArgs The arguments to selection, if any ?s are pesent 1658 * @param sortOrder SQL ORDER BY clause. 1659 * 1660 * @return The Cursor that was returned by query(). 1661 * 1662 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1663 * @see #startManagingCursor 1664 * 1665 * @deprecated Use {@link CursorLoader} instead. 1666 */ 1667 @Deprecated 1668 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1669 String[] selectionArgs, String sortOrder) { 1670 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1671 if (c != null) { 1672 startManagingCursor(c); 1673 } 1674 return c; 1675 } 1676 1677 /** 1678 * @deprecated Use the new {@link android.content.CursorLoader} class with 1679 * {@link LoaderManager} instead; this is also 1680 * available on older platforms through the Android compatibility package. 1681 * 1682 * This method allows the activity to take care of managing the given 1683 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1684 * That is, when the activity is stopped it will automatically call 1685 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1686 * it will call {@link Cursor#requery} for you. When the activity is 1687 * destroyed, all managed Cursors will be closed automatically. 1688 * 1689 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1690 * or later, consider instead using {@link LoaderManager} instead, available 1691 * via {@link #getLoaderManager()}.</em> 1692 * 1693 * @param c The Cursor to be managed. 1694 * 1695 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1696 * @see #stopManagingCursor 1697 */ 1698 @Deprecated 1699 public void startManagingCursor(Cursor c) { 1700 synchronized (mManagedCursors) { 1701 mManagedCursors.add(new ManagedCursor(c)); 1702 } 1703 } 1704 1705 /** 1706 * @deprecated Use the new {@link android.content.CursorLoader} class with 1707 * {@link LoaderManager} instead; this is also 1708 * available on older platforms through the Android compatibility package. 1709 * 1710 * Given a Cursor that was previously given to 1711 * {@link #startManagingCursor}, stop the activity's management of that 1712 * cursor. 1713 * 1714 * @param c The Cursor that was being managed. 1715 * 1716 * @see #startManagingCursor 1717 */ 1718 @Deprecated 1719 public void stopManagingCursor(Cursor c) { 1720 synchronized (mManagedCursors) { 1721 final int N = mManagedCursors.size(); 1722 for (int i=0; i<N; i++) { 1723 ManagedCursor mc = mManagedCursors.get(i); 1724 if (mc.mCursor == c) { 1725 mManagedCursors.remove(i); 1726 break; 1727 } 1728 } 1729 } 1730 } 1731 1732 /** 1733 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 1734 * this is a no-op. 1735 * @hide 1736 */ 1737 @Deprecated 1738 public void setPersistent(boolean isPersistent) { 1739 } 1740 1741 /** 1742 * Finds a view that was identified by the id attribute from the XML that 1743 * was processed in {@link #onCreate}. 1744 * 1745 * @return The view if found or null otherwise. 1746 */ 1747 public View findViewById(int id) { 1748 return getWindow().findViewById(id); 1749 } 1750 1751 /** 1752 * Retrieve a reference to this activity's ActionBar. 1753 * 1754 * @return The Activity's ActionBar, or null if it does not have one. 1755 */ 1756 public ActionBar getActionBar() { 1757 initActionBar(); 1758 return mActionBar; 1759 } 1760 1761 /** 1762 * Creates a new ActionBar, locates the inflated ActionBarView, 1763 * initializes the ActionBar with the view, and sets mActionBar. 1764 */ 1765 private void initActionBar() { 1766 Window window = getWindow(); 1767 1768 // Initializing the window decor can change window feature flags. 1769 // Make sure that we have the correct set before performing the test below. 1770 window.getDecorView(); 1771 1772 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 1773 return; 1774 } 1775 1776 mActionBar = new ActionBarImpl(this); 1777 } 1778 1779 /** 1780 * Set the activity content from a layout resource. The resource will be 1781 * inflated, adding all top-level views to the activity. 1782 * 1783 * @param layoutResID Resource ID to be inflated. 1784 * 1785 * @see #setContentView(android.view.View) 1786 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1787 */ 1788 public void setContentView(int layoutResID) { 1789 getWindow().setContentView(layoutResID); 1790 initActionBar(); 1791 } 1792 1793 /** 1794 * Set the activity content to an explicit view. This view is placed 1795 * directly into the activity's view hierarchy. It can itself be a complex 1796 * view hierarchy. When calling this method, the layout parameters of the 1797 * specified view are ignored. Both the width and the height of the view are 1798 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 1799 * your own layout parameters, invoke 1800 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 1801 * instead. 1802 * 1803 * @param view The desired content to display. 1804 * 1805 * @see #setContentView(int) 1806 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1807 */ 1808 public void setContentView(View view) { 1809 getWindow().setContentView(view); 1810 initActionBar(); 1811 } 1812 1813 /** 1814 * Set the activity content to an explicit view. This view is placed 1815 * directly into the activity's view hierarchy. It can itself be a complex 1816 * view hierarchy. 1817 * 1818 * @param view The desired content to display. 1819 * @param params Layout parameters for the view. 1820 * 1821 * @see #setContentView(android.view.View) 1822 * @see #setContentView(int) 1823 */ 1824 public void setContentView(View view, ViewGroup.LayoutParams params) { 1825 getWindow().setContentView(view, params); 1826 initActionBar(); 1827 } 1828 1829 /** 1830 * Add an additional content view to the activity. Added after any existing 1831 * ones in the activity -- existing views are NOT removed. 1832 * 1833 * @param view The desired content to display. 1834 * @param params Layout parameters for the view. 1835 */ 1836 public void addContentView(View view, ViewGroup.LayoutParams params) { 1837 getWindow().addContentView(view, params); 1838 initActionBar(); 1839 } 1840 1841 /** 1842 * Sets whether this activity is finished when touched outside its window's 1843 * bounds. 1844 */ 1845 public void setFinishOnTouchOutside(boolean finish) { 1846 mWindow.setCloseOnTouchOutside(finish); 1847 } 1848 1849 /** 1850 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1851 * keys. 1852 * 1853 * @see #setDefaultKeyMode 1854 */ 1855 static public final int DEFAULT_KEYS_DISABLE = 0; 1856 /** 1857 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1858 * key handling. 1859 * 1860 * @see #setDefaultKeyMode 1861 */ 1862 static public final int DEFAULT_KEYS_DIALER = 1; 1863 /** 1864 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1865 * default key handling. 1866 * 1867 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1868 * 1869 * @see #setDefaultKeyMode 1870 */ 1871 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1872 /** 1873 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1874 * will start an application-defined search. (If the application or activity does not 1875 * actually define a search, the the keys will be ignored.) 1876 * 1877 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1878 * 1879 * @see #setDefaultKeyMode 1880 */ 1881 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1882 1883 /** 1884 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1885 * will start a global search (typically web search, but some platforms may define alternate 1886 * methods for global search) 1887 * 1888 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1889 * 1890 * @see #setDefaultKeyMode 1891 */ 1892 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1893 1894 /** 1895 * Select the default key handling for this activity. This controls what 1896 * will happen to key events that are not otherwise handled. The default 1897 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1898 * floor. Other modes allow you to launch the dialer 1899 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1900 * menu without requiring the menu key be held down 1901 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1902 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1903 * 1904 * <p>Note that the mode selected here does not impact the default 1905 * handling of system keys, such as the "back" and "menu" keys, and your 1906 * activity and its views always get a first chance to receive and handle 1907 * all application keys. 1908 * 1909 * @param mode The desired default key mode constant. 1910 * 1911 * @see #DEFAULT_KEYS_DISABLE 1912 * @see #DEFAULT_KEYS_DIALER 1913 * @see #DEFAULT_KEYS_SHORTCUT 1914 * @see #DEFAULT_KEYS_SEARCH_LOCAL 1915 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 1916 * @see #onKeyDown 1917 */ 1918 public final void setDefaultKeyMode(int mode) { 1919 mDefaultKeyMode = mode; 1920 1921 // Some modes use a SpannableStringBuilder to track & dispatch input events 1922 // This list must remain in sync with the switch in onKeyDown() 1923 switch (mode) { 1924 case DEFAULT_KEYS_DISABLE: 1925 case DEFAULT_KEYS_SHORTCUT: 1926 mDefaultKeySsb = null; // not used in these modes 1927 break; 1928 case DEFAULT_KEYS_DIALER: 1929 case DEFAULT_KEYS_SEARCH_LOCAL: 1930 case DEFAULT_KEYS_SEARCH_GLOBAL: 1931 mDefaultKeySsb = new SpannableStringBuilder(); 1932 Selection.setSelection(mDefaultKeySsb,0); 1933 break; 1934 default: 1935 throw new IllegalArgumentException(); 1936 } 1937 } 1938 1939 /** 1940 * Called when a key was pressed down and not handled by any of the views 1941 * inside of the activity. So, for example, key presses while the cursor 1942 * is inside a TextView will not trigger the event (unless it is a navigation 1943 * to another object) because TextView handles its own key presses. 1944 * 1945 * <p>If the focused view didn't want this event, this method is called. 1946 * 1947 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 1948 * by calling {@link #onBackPressed()}, though the behavior varies based 1949 * on the application compatibility mode: for 1950 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 1951 * it will set up the dispatch to call {@link #onKeyUp} where the action 1952 * will be performed; for earlier applications, it will perform the 1953 * action immediately in on-down, as those versions of the platform 1954 * behaved. 1955 * 1956 * <p>Other additional default key handling may be performed 1957 * if configured with {@link #setDefaultKeyMode}. 1958 * 1959 * @return Return <code>true</code> to prevent this event from being propagated 1960 * further, or <code>false</code> to indicate that you have not handled 1961 * this event and it should continue to be propagated. 1962 * @see #onKeyUp 1963 * @see android.view.KeyEvent 1964 */ 1965 public boolean onKeyDown(int keyCode, KeyEvent event) { 1966 if (keyCode == KeyEvent.KEYCODE_BACK) { 1967 if (getApplicationInfo().targetSdkVersion 1968 >= Build.VERSION_CODES.ECLAIR) { 1969 event.startTracking(); 1970 } else { 1971 onBackPressed(); 1972 } 1973 return true; 1974 } 1975 1976 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 1977 return false; 1978 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 1979 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 1980 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 1981 return true; 1982 } 1983 return false; 1984 } else { 1985 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 1986 boolean clearSpannable = false; 1987 boolean handled; 1988 if ((event.getRepeatCount() != 0) || event.isSystem()) { 1989 clearSpannable = true; 1990 handled = false; 1991 } else { 1992 handled = TextKeyListener.getInstance().onKeyDown( 1993 null, mDefaultKeySsb, keyCode, event); 1994 if (handled && mDefaultKeySsb.length() > 0) { 1995 // something useable has been typed - dispatch it now. 1996 1997 final String str = mDefaultKeySsb.toString(); 1998 clearSpannable = true; 1999 2000 switch (mDefaultKeyMode) { 2001 case DEFAULT_KEYS_DIALER: 2002 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2003 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2004 startActivity(intent); 2005 break; 2006 case DEFAULT_KEYS_SEARCH_LOCAL: 2007 startSearch(str, false, null, false); 2008 break; 2009 case DEFAULT_KEYS_SEARCH_GLOBAL: 2010 startSearch(str, false, null, true); 2011 break; 2012 } 2013 } 2014 } 2015 if (clearSpannable) { 2016 mDefaultKeySsb.clear(); 2017 mDefaultKeySsb.clearSpans(); 2018 Selection.setSelection(mDefaultKeySsb,0); 2019 } 2020 return handled; 2021 } 2022 } 2023 2024 /** 2025 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2026 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2027 * the event). 2028 */ 2029 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2030 return false; 2031 } 2032 2033 /** 2034 * Called when a key was released and not handled by any of the views 2035 * inside of the activity. So, for example, key presses while the cursor 2036 * is inside a TextView will not trigger the event (unless it is a navigation 2037 * to another object) because TextView handles its own key presses. 2038 * 2039 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2040 * and go back. 2041 * 2042 * @return Return <code>true</code> to prevent this event from being propagated 2043 * further, or <code>false</code> to indicate that you have not handled 2044 * this event and it should continue to be propagated. 2045 * @see #onKeyDown 2046 * @see KeyEvent 2047 */ 2048 public boolean onKeyUp(int keyCode, KeyEvent event) { 2049 if (getApplicationInfo().targetSdkVersion 2050 >= Build.VERSION_CODES.ECLAIR) { 2051 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2052 && !event.isCanceled()) { 2053 onBackPressed(); 2054 return true; 2055 } 2056 } 2057 return false; 2058 } 2059 2060 /** 2061 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2062 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2063 * the event). 2064 */ 2065 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2066 return false; 2067 } 2068 2069 /** 2070 * Called when the activity has detected the user's press of the back 2071 * key. The default implementation simply finishes the current activity, 2072 * but you can override this to do whatever you want. 2073 */ 2074 public void onBackPressed() { 2075 if (!mFragments.popBackStackImmediate()) { 2076 finish(); 2077 } 2078 } 2079 2080 /** 2081 * Called when a key shortcut event is not handled by any of the views in the Activity. 2082 * Override this method to implement global key shortcuts for the Activity. 2083 * Key shortcuts can also be implemented by setting the 2084 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2085 * 2086 * @param keyCode The value in event.getKeyCode(). 2087 * @param event Description of the key event. 2088 * @return True if the key shortcut was handled. 2089 */ 2090 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2091 return false; 2092 } 2093 2094 /** 2095 * Called when a touch screen event was not handled by any of the views 2096 * under it. This is most useful to process touch events that happen 2097 * outside of your window bounds, where there is no view to receive it. 2098 * 2099 * @param event The touch screen event being processed. 2100 * 2101 * @return Return true if you have consumed the event, false if you haven't. 2102 * The default implementation always returns false. 2103 */ 2104 public boolean onTouchEvent(MotionEvent event) { 2105 if (mWindow.shouldCloseOnTouch(this, event)) { 2106 finish(); 2107 return true; 2108 } 2109 2110 return false; 2111 } 2112 2113 /** 2114 * Called when the trackball was moved and not handled by any of the 2115 * views inside of the activity. So, for example, if the trackball moves 2116 * while focus is on a button, you will receive a call here because 2117 * buttons do not normally do anything with trackball events. The call 2118 * here happens <em>before</em> trackball movements are converted to 2119 * DPAD key events, which then get sent back to the view hierarchy, and 2120 * will be processed at the point for things like focus navigation. 2121 * 2122 * @param event The trackball event being processed. 2123 * 2124 * @return Return true if you have consumed the event, false if you haven't. 2125 * The default implementation always returns false. 2126 */ 2127 public boolean onTrackballEvent(MotionEvent event) { 2128 return false; 2129 } 2130 2131 /** 2132 * Called when a generic motion event was not handled by any of the 2133 * views inside of the activity. 2134 * <p> 2135 * Generic motion events describe joystick movements, mouse hovers, track pad 2136 * touches, scroll wheel movements and other input events. The 2137 * {@link MotionEvent#getSource() source} of the motion event specifies 2138 * the class of input that was received. Implementations of this method 2139 * must examine the bits in the source before processing the event. 2140 * The following code example shows how this is done. 2141 * </p><p> 2142 * Generic motion events with source class 2143 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2144 * are delivered to the view under the pointer. All other generic motion events are 2145 * delivered to the focused view. 2146 * </p><p> 2147 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2148 * handle this event. 2149 * </p> 2150 * 2151 * @param event The generic motion event being processed. 2152 * 2153 * @return Return true if you have consumed the event, false if you haven't. 2154 * The default implementation always returns false. 2155 */ 2156 public boolean onGenericMotionEvent(MotionEvent event) { 2157 return false; 2158 } 2159 2160 /** 2161 * Called whenever a key, touch, or trackball event is dispatched to the 2162 * activity. Implement this method if you wish to know that the user has 2163 * interacted with the device in some way while your activity is running. 2164 * This callback and {@link #onUserLeaveHint} are intended to help 2165 * activities manage status bar notifications intelligently; specifically, 2166 * for helping activities determine the proper time to cancel a notfication. 2167 * 2168 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2169 * be accompanied by calls to {@link #onUserInteraction}. This 2170 * ensures that your activity will be told of relevant user activity such 2171 * as pulling down the notification pane and touching an item there. 2172 * 2173 * <p>Note that this callback will be invoked for the touch down action 2174 * that begins a touch gesture, but may not be invoked for the touch-moved 2175 * and touch-up actions that follow. 2176 * 2177 * @see #onUserLeaveHint() 2178 */ 2179 public void onUserInteraction() { 2180 } 2181 2182 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2183 // Update window manager if: we have a view, that view is 2184 // attached to its parent (which will be a RootView), and 2185 // this activity is not embedded. 2186 if (mParent == null) { 2187 View decor = mDecor; 2188 if (decor != null && decor.getParent() != null) { 2189 getWindowManager().updateViewLayout(decor, params); 2190 } 2191 } 2192 } 2193 2194 public void onContentChanged() { 2195 } 2196 2197 /** 2198 * Called when the current {@link Window} of the activity gains or loses 2199 * focus. This is the best indicator of whether this activity is visible 2200 * to the user. The default implementation clears the key tracking 2201 * state, so should always be called. 2202 * 2203 * <p>Note that this provides information about global focus state, which 2204 * is managed independently of activity lifecycles. As such, while focus 2205 * changes will generally have some relation to lifecycle changes (an 2206 * activity that is stopped will not generally get window focus), you 2207 * should not rely on any particular order between the callbacks here and 2208 * those in the other lifecycle methods such as {@link #onResume}. 2209 * 2210 * <p>As a general rule, however, a resumed activity will have window 2211 * focus... unless it has displayed other dialogs or popups that take 2212 * input focus, in which case the activity itself will not have focus 2213 * when the other windows have it. Likewise, the system may display 2214 * system-level windows (such as the status bar notification panel or 2215 * a system alert) which will temporarily take window input focus without 2216 * pausing the foreground activity. 2217 * 2218 * @param hasFocus Whether the window of this activity has focus. 2219 * 2220 * @see #hasWindowFocus() 2221 * @see #onResume 2222 * @see View#onWindowFocusChanged(boolean) 2223 */ 2224 public void onWindowFocusChanged(boolean hasFocus) { 2225 } 2226 2227 /** 2228 * Called when the main window associated with the activity has been 2229 * attached to the window manager. 2230 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2231 * for more information. 2232 * @see View#onAttachedToWindow 2233 */ 2234 public void onAttachedToWindow() { 2235 } 2236 2237 /** 2238 * Called when the main window associated with the activity has been 2239 * detached from the window manager. 2240 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2241 * for more information. 2242 * @see View#onDetachedFromWindow 2243 */ 2244 public void onDetachedFromWindow() { 2245 } 2246 2247 /** 2248 * Returns true if this activity's <em>main</em> window currently has window focus. 2249 * Note that this is not the same as the view itself having focus. 2250 * 2251 * @return True if this activity's main window currently has window focus. 2252 * 2253 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2254 */ 2255 public boolean hasWindowFocus() { 2256 Window w = getWindow(); 2257 if (w != null) { 2258 View d = w.getDecorView(); 2259 if (d != null) { 2260 return d.hasWindowFocus(); 2261 } 2262 } 2263 return false; 2264 } 2265 2266 /** 2267 * Called to process key events. You can override this to intercept all 2268 * key events before they are dispatched to the window. Be sure to call 2269 * this implementation for key events that should be handled normally. 2270 * 2271 * @param event The key event. 2272 * 2273 * @return boolean Return true if this event was consumed. 2274 */ 2275 public boolean dispatchKeyEvent(KeyEvent event) { 2276 onUserInteraction(); 2277 Window win = getWindow(); 2278 if (win.superDispatchKeyEvent(event)) { 2279 return true; 2280 } 2281 View decor = mDecor; 2282 if (decor == null) decor = win.getDecorView(); 2283 return event.dispatch(this, decor != null 2284 ? decor.getKeyDispatcherState() : null, this); 2285 } 2286 2287 /** 2288 * Called to process a key shortcut event. 2289 * You can override this to intercept all key shortcut events before they are 2290 * dispatched to the window. Be sure to call this implementation for key shortcut 2291 * events that should be handled normally. 2292 * 2293 * @param event The key shortcut event. 2294 * @return True if this event was consumed. 2295 */ 2296 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 2297 onUserInteraction(); 2298 if (getWindow().superDispatchKeyShortcutEvent(event)) { 2299 return true; 2300 } 2301 return onKeyShortcut(event.getKeyCode(), event); 2302 } 2303 2304 /** 2305 * Called to process touch screen events. You can override this to 2306 * intercept all touch screen events before they are dispatched to the 2307 * window. Be sure to call this implementation for touch screen events 2308 * that should be handled normally. 2309 * 2310 * @param ev The touch screen event. 2311 * 2312 * @return boolean Return true if this event was consumed. 2313 */ 2314 public boolean dispatchTouchEvent(MotionEvent ev) { 2315 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2316 onUserInteraction(); 2317 } 2318 if (getWindow().superDispatchTouchEvent(ev)) { 2319 return true; 2320 } 2321 return onTouchEvent(ev); 2322 } 2323 2324 /** 2325 * Called to process trackball events. You can override this to 2326 * intercept all trackball events before they are dispatched to the 2327 * window. Be sure to call this implementation for trackball events 2328 * that should be handled normally. 2329 * 2330 * @param ev The trackball event. 2331 * 2332 * @return boolean Return true if this event was consumed. 2333 */ 2334 public boolean dispatchTrackballEvent(MotionEvent ev) { 2335 onUserInteraction(); 2336 if (getWindow().superDispatchTrackballEvent(ev)) { 2337 return true; 2338 } 2339 return onTrackballEvent(ev); 2340 } 2341 2342 /** 2343 * Called to process generic motion events. You can override this to 2344 * intercept all generic motion events before they are dispatched to the 2345 * window. Be sure to call this implementation for generic motion events 2346 * that should be handled normally. 2347 * 2348 * @param ev The generic motion event. 2349 * 2350 * @return boolean Return true if this event was consumed. 2351 */ 2352 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 2353 onUserInteraction(); 2354 if (getWindow().superDispatchGenericMotionEvent(ev)) { 2355 return true; 2356 } 2357 return onGenericMotionEvent(ev); 2358 } 2359 2360 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2361 event.setClassName(getClass().getName()); 2362 event.setPackageName(getPackageName()); 2363 2364 LayoutParams params = getWindow().getAttributes(); 2365 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2366 (params.height == LayoutParams.MATCH_PARENT); 2367 event.setFullScreen(isFullScreen); 2368 2369 CharSequence title = getTitle(); 2370 if (!TextUtils.isEmpty(title)) { 2371 event.getText().add(title); 2372 } 2373 2374 return true; 2375 } 2376 2377 /** 2378 * Default implementation of 2379 * {@link android.view.Window.Callback#onCreatePanelView} 2380 * for activities. This 2381 * simply returns null so that all panel sub-windows will have the default 2382 * menu behavior. 2383 */ 2384 public View onCreatePanelView(int featureId) { 2385 return null; 2386 } 2387 2388 /** 2389 * Default implementation of 2390 * {@link android.view.Window.Callback#onCreatePanelMenu} 2391 * for activities. This calls through to the new 2392 * {@link #onCreateOptionsMenu} method for the 2393 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2394 * so that subclasses of Activity don't need to deal with feature codes. 2395 */ 2396 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2397 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2398 boolean show = onCreateOptionsMenu(menu); 2399 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 2400 return show; 2401 } 2402 return false; 2403 } 2404 2405 /** 2406 * Default implementation of 2407 * {@link android.view.Window.Callback#onPreparePanel} 2408 * for activities. This 2409 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2410 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2411 * panel, so that subclasses of 2412 * Activity don't need to deal with feature codes. 2413 */ 2414 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2415 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2416 boolean goforit = onPrepareOptionsMenu(menu); 2417 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 2418 return goforit && menu.hasVisibleItems(); 2419 } 2420 return true; 2421 } 2422 2423 /** 2424 * {@inheritDoc} 2425 * 2426 * @return The default implementation returns true. 2427 */ 2428 public boolean onMenuOpened(int featureId, Menu menu) { 2429 if (featureId == Window.FEATURE_ACTION_BAR) { 2430 initActionBar(); 2431 if (mActionBar != null) { 2432 mActionBar.dispatchMenuVisibilityChanged(true); 2433 } else { 2434 Log.e(TAG, "Tried to open action bar menu with no action bar"); 2435 } 2436 } 2437 return true; 2438 } 2439 2440 /** 2441 * Default implementation of 2442 * {@link android.view.Window.Callback#onMenuItemSelected} 2443 * for activities. This calls through to the new 2444 * {@link #onOptionsItemSelected} method for the 2445 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2446 * panel, so that subclasses of 2447 * Activity don't need to deal with feature codes. 2448 */ 2449 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2450 switch (featureId) { 2451 case Window.FEATURE_OPTIONS_PANEL: 2452 // Put event logging here so it gets called even if subclass 2453 // doesn't call through to superclass's implmeentation of each 2454 // of these methods below 2455 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2456 if (onOptionsItemSelected(item)) { 2457 return true; 2458 } 2459 return mFragments.dispatchOptionsItemSelected(item); 2460 2461 case Window.FEATURE_CONTEXT_MENU: 2462 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2463 if (onContextItemSelected(item)) { 2464 return true; 2465 } 2466 return mFragments.dispatchContextItemSelected(item); 2467 2468 default: 2469 return false; 2470 } 2471 } 2472 2473 /** 2474 * Default implementation of 2475 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2476 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2477 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2478 * so that subclasses of Activity don't need to deal with feature codes. 2479 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2480 * {@link #onContextMenuClosed(Menu)} will be called. 2481 */ 2482 public void onPanelClosed(int featureId, Menu menu) { 2483 switch (featureId) { 2484 case Window.FEATURE_OPTIONS_PANEL: 2485 mFragments.dispatchOptionsMenuClosed(menu); 2486 onOptionsMenuClosed(menu); 2487 break; 2488 2489 case Window.FEATURE_CONTEXT_MENU: 2490 onContextMenuClosed(menu); 2491 break; 2492 2493 case Window.FEATURE_ACTION_BAR: 2494 initActionBar(); 2495 mActionBar.dispatchMenuVisibilityChanged(false); 2496 break; 2497 } 2498 } 2499 2500 /** 2501 * Declare that the options menu has changed, so should be recreated. 2502 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 2503 * time it needs to be displayed. 2504 */ 2505 public void invalidateOptionsMenu() { 2506 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 2507 } 2508 2509 /** 2510 * Initialize the contents of the Activity's standard options menu. You 2511 * should place your menu items in to <var>menu</var>. 2512 * 2513 * <p>This is only called once, the first time the options menu is 2514 * displayed. To update the menu every time it is displayed, see 2515 * {@link #onPrepareOptionsMenu}. 2516 * 2517 * <p>The default implementation populates the menu with standard system 2518 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2519 * they will be correctly ordered with application-defined menu items. 2520 * Deriving classes should always call through to the base implementation. 2521 * 2522 * <p>You can safely hold on to <var>menu</var> (and any items created 2523 * from it), making modifications to it as desired, until the next 2524 * time onCreateOptionsMenu() is called. 2525 * 2526 * <p>When you add items to the menu, you can implement the Activity's 2527 * {@link #onOptionsItemSelected} method to handle them there. 2528 * 2529 * @param menu The options menu in which you place your items. 2530 * 2531 * @return You must return true for the menu to be displayed; 2532 * if you return false it will not be shown. 2533 * 2534 * @see #onPrepareOptionsMenu 2535 * @see #onOptionsItemSelected 2536 */ 2537 public boolean onCreateOptionsMenu(Menu menu) { 2538 if (mParent != null) { 2539 return mParent.onCreateOptionsMenu(menu); 2540 } 2541 return true; 2542 } 2543 2544 /** 2545 * Prepare the Screen's standard options menu to be displayed. This is 2546 * called right before the menu is shown, every time it is shown. You can 2547 * use this method to efficiently enable/disable items or otherwise 2548 * dynamically modify the contents. 2549 * 2550 * <p>The default implementation updates the system menu items based on the 2551 * activity's state. Deriving classes should always call through to the 2552 * base class implementation. 2553 * 2554 * @param menu The options menu as last shown or first initialized by 2555 * onCreateOptionsMenu(). 2556 * 2557 * @return You must return true for the menu to be displayed; 2558 * if you return false it will not be shown. 2559 * 2560 * @see #onCreateOptionsMenu 2561 */ 2562 public boolean onPrepareOptionsMenu(Menu menu) { 2563 if (mParent != null) { 2564 return mParent.onPrepareOptionsMenu(menu); 2565 } 2566 return true; 2567 } 2568 2569 /** 2570 * This hook is called whenever an item in your options menu is selected. 2571 * The default implementation simply returns false to have the normal 2572 * processing happen (calling the item's Runnable or sending a message to 2573 * its Handler as appropriate). You can use this method for any items 2574 * for which you would like to do processing without those other 2575 * facilities. 2576 * 2577 * <p>Derived classes should call through to the base class for it to 2578 * perform the default menu handling. 2579 * 2580 * @param item The menu item that was selected. 2581 * 2582 * @return boolean Return false to allow normal menu processing to 2583 * proceed, true to consume it here. 2584 * 2585 * @see #onCreateOptionsMenu 2586 */ 2587 public boolean onOptionsItemSelected(MenuItem item) { 2588 if (mParent != null) { 2589 return mParent.onOptionsItemSelected(item); 2590 } 2591 return false; 2592 } 2593 2594 /** 2595 * This hook is called whenever the options menu is being closed (either by the user canceling 2596 * the menu with the back/menu button, or when an item is selected). 2597 * 2598 * @param menu The options menu as last shown or first initialized by 2599 * onCreateOptionsMenu(). 2600 */ 2601 public void onOptionsMenuClosed(Menu menu) { 2602 if (mParent != null) { 2603 mParent.onOptionsMenuClosed(menu); 2604 } 2605 } 2606 2607 /** 2608 * Programmatically opens the options menu. If the options menu is already 2609 * open, this method does nothing. 2610 */ 2611 public void openOptionsMenu() { 2612 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2613 } 2614 2615 /** 2616 * Progammatically closes the options menu. If the options menu is already 2617 * closed, this method does nothing. 2618 */ 2619 public void closeOptionsMenu() { 2620 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2621 } 2622 2623 /** 2624 * Called when a context menu for the {@code view} is about to be shown. 2625 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2626 * time the context menu is about to be shown and should be populated for 2627 * the view (or item inside the view for {@link AdapterView} subclasses, 2628 * this can be found in the {@code menuInfo})). 2629 * <p> 2630 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2631 * item has been selected. 2632 * <p> 2633 * It is not safe to hold onto the context menu after this method returns. 2634 * {@inheritDoc} 2635 */ 2636 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2637 } 2638 2639 /** 2640 * Registers a context menu to be shown for the given view (multiple views 2641 * can show the context menu). This method will set the 2642 * {@link OnCreateContextMenuListener} on the view to this activity, so 2643 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2644 * called when it is time to show the context menu. 2645 * 2646 * @see #unregisterForContextMenu(View) 2647 * @param view The view that should show a context menu. 2648 */ 2649 public void registerForContextMenu(View view) { 2650 view.setOnCreateContextMenuListener(this); 2651 } 2652 2653 /** 2654 * Prevents a context menu to be shown for the given view. This method will remove the 2655 * {@link OnCreateContextMenuListener} on the view. 2656 * 2657 * @see #registerForContextMenu(View) 2658 * @param view The view that should stop showing a context menu. 2659 */ 2660 public void unregisterForContextMenu(View view) { 2661 view.setOnCreateContextMenuListener(null); 2662 } 2663 2664 /** 2665 * Programmatically opens the context menu for a particular {@code view}. 2666 * The {@code view} should have been added via 2667 * {@link #registerForContextMenu(View)}. 2668 * 2669 * @param view The view to show the context menu for. 2670 */ 2671 public void openContextMenu(View view) { 2672 view.showContextMenu(); 2673 } 2674 2675 /** 2676 * Programmatically closes the most recently opened context menu, if showing. 2677 */ 2678 public void closeContextMenu() { 2679 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2680 } 2681 2682 /** 2683 * This hook is called whenever an item in a context menu is selected. The 2684 * default implementation simply returns false to have the normal processing 2685 * happen (calling the item's Runnable or sending a message to its Handler 2686 * as appropriate). You can use this method for any items for which you 2687 * would like to do processing without those other facilities. 2688 * <p> 2689 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2690 * View that added this menu item. 2691 * <p> 2692 * Derived classes should call through to the base class for it to perform 2693 * the default menu handling. 2694 * 2695 * @param item The context menu item that was selected. 2696 * @return boolean Return false to allow normal context menu processing to 2697 * proceed, true to consume it here. 2698 */ 2699 public boolean onContextItemSelected(MenuItem item) { 2700 if (mParent != null) { 2701 return mParent.onContextItemSelected(item); 2702 } 2703 return false; 2704 } 2705 2706 /** 2707 * This hook is called whenever the context menu is being closed (either by 2708 * the user canceling the menu with the back/menu button, or when an item is 2709 * selected). 2710 * 2711 * @param menu The context menu that is being closed. 2712 */ 2713 public void onContextMenuClosed(Menu menu) { 2714 if (mParent != null) { 2715 mParent.onContextMenuClosed(menu); 2716 } 2717 } 2718 2719 /** 2720 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2721 */ 2722 @Deprecated 2723 protected Dialog onCreateDialog(int id) { 2724 return null; 2725 } 2726 2727 /** 2728 * @deprecated Use the new {@link DialogFragment} class with 2729 * {@link FragmentManager} instead; this is also 2730 * available on older platforms through the Android compatibility package. 2731 * 2732 * Callback for creating dialogs that are managed (saved and restored) for you 2733 * by the activity. The default implementation calls through to 2734 * {@link #onCreateDialog(int)} for compatibility. 2735 * 2736 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2737 * or later, consider instead using a {@link DialogFragment} instead.</em> 2738 * 2739 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2740 * this method the first time, and hang onto it thereafter. Any dialog 2741 * that is created by this method will automatically be saved and restored 2742 * for you, including whether it is showing. 2743 * 2744 * <p>If you would like the activity to manage saving and restoring dialogs 2745 * for you, you should override this method and handle any ids that are 2746 * passed to {@link #showDialog}. 2747 * 2748 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2749 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2750 * 2751 * @param id The id of the dialog. 2752 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2753 * @return The dialog. If you return null, the dialog will not be created. 2754 * 2755 * @see #onPrepareDialog(int, Dialog, Bundle) 2756 * @see #showDialog(int, Bundle) 2757 * @see #dismissDialog(int) 2758 * @see #removeDialog(int) 2759 */ 2760 @Deprecated 2761 protected Dialog onCreateDialog(int id, Bundle args) { 2762 return onCreateDialog(id); 2763 } 2764 2765 /** 2766 * @deprecated Old no-arguments version of 2767 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2768 */ 2769 @Deprecated 2770 protected void onPrepareDialog(int id, Dialog dialog) { 2771 dialog.setOwnerActivity(this); 2772 } 2773 2774 /** 2775 * @deprecated Use the new {@link DialogFragment} class with 2776 * {@link FragmentManager} instead; this is also 2777 * available on older platforms through the Android compatibility package. 2778 * 2779 * Provides an opportunity to prepare a managed dialog before it is being 2780 * shown. The default implementation calls through to 2781 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2782 * 2783 * <p> 2784 * Override this if you need to update a managed dialog based on the state 2785 * of the application each time it is shown. For example, a time picker 2786 * dialog might want to be updated with the current time. You should call 2787 * through to the superclass's implementation. The default implementation 2788 * will set this Activity as the owner activity on the Dialog. 2789 * 2790 * @param id The id of the managed dialog. 2791 * @param dialog The dialog. 2792 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2793 * @see #onCreateDialog(int, Bundle) 2794 * @see #showDialog(int) 2795 * @see #dismissDialog(int) 2796 * @see #removeDialog(int) 2797 */ 2798 @Deprecated 2799 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 2800 onPrepareDialog(id, dialog); 2801 } 2802 2803 /** 2804 * @deprecated Use the new {@link DialogFragment} class with 2805 * {@link FragmentManager} instead; this is also 2806 * available on older platforms through the Android compatibility package. 2807 * 2808 * Simple version of {@link #showDialog(int, Bundle)} that does not 2809 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 2810 * with null arguments. 2811 */ 2812 @Deprecated 2813 public final void showDialog(int id) { 2814 showDialog(id, null); 2815 } 2816 2817 /** 2818 * @deprecated Use the new {@link DialogFragment} class with 2819 * {@link FragmentManager} instead; this is also 2820 * available on older platforms through the Android compatibility package. 2821 * 2822 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 2823 * will be made with the same id the first time this is called for a given 2824 * id. From thereafter, the dialog will be automatically saved and restored. 2825 * 2826 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2827 * or later, consider instead using a {@link DialogFragment} instead.</em> 2828 * 2829 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 2830 * be made to provide an opportunity to do any timely preparation. 2831 * 2832 * @param id The id of the managed dialog. 2833 * @param args Arguments to pass through to the dialog. These will be saved 2834 * and restored for you. Note that if the dialog is already created, 2835 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 2836 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 2837 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 2838 * @return Returns true if the Dialog was created; false is returned if 2839 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 2840 * 2841 * @see Dialog 2842 * @see #onCreateDialog(int, Bundle) 2843 * @see #onPrepareDialog(int, Dialog, Bundle) 2844 * @see #dismissDialog(int) 2845 * @see #removeDialog(int) 2846 */ 2847 @Deprecated 2848 public final boolean showDialog(int id, Bundle args) { 2849 if (mManagedDialogs == null) { 2850 mManagedDialogs = new SparseArray<ManagedDialog>(); 2851 } 2852 ManagedDialog md = mManagedDialogs.get(id); 2853 if (md == null) { 2854 md = new ManagedDialog(); 2855 md.mDialog = createDialog(id, null, args); 2856 if (md.mDialog == null) { 2857 return false; 2858 } 2859 mManagedDialogs.put(id, md); 2860 } 2861 2862 md.mArgs = args; 2863 onPrepareDialog(id, md.mDialog, args); 2864 md.mDialog.show(); 2865 return true; 2866 } 2867 2868 /** 2869 * @deprecated Use the new {@link DialogFragment} class with 2870 * {@link FragmentManager} instead; this is also 2871 * available on older platforms through the Android compatibility package. 2872 * 2873 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 2874 * 2875 * @param id The id of the managed dialog. 2876 * 2877 * @throws IllegalArgumentException if the id was not previously shown via 2878 * {@link #showDialog(int)}. 2879 * 2880 * @see #onCreateDialog(int, Bundle) 2881 * @see #onPrepareDialog(int, Dialog, Bundle) 2882 * @see #showDialog(int) 2883 * @see #removeDialog(int) 2884 */ 2885 @Deprecated 2886 public final void dismissDialog(int id) { 2887 if (mManagedDialogs == null) { 2888 throw missingDialog(id); 2889 } 2890 2891 final ManagedDialog md = mManagedDialogs.get(id); 2892 if (md == null) { 2893 throw missingDialog(id); 2894 } 2895 md.mDialog.dismiss(); 2896 } 2897 2898 /** 2899 * Creates an exception to throw if a user passed in a dialog id that is 2900 * unexpected. 2901 */ 2902 private IllegalArgumentException missingDialog(int id) { 2903 return new IllegalArgumentException("no dialog with id " + id + " was ever " 2904 + "shown via Activity#showDialog"); 2905 } 2906 2907 /** 2908 * @deprecated Use the new {@link DialogFragment} class with 2909 * {@link FragmentManager} instead; this is also 2910 * available on older platforms through the Android compatibility package. 2911 * 2912 * Removes any internal references to a dialog managed by this Activity. 2913 * If the dialog is showing, it will dismiss it as part of the clean up. 2914 * 2915 * <p>This can be useful if you know that you will never show a dialog again and 2916 * want to avoid the overhead of saving and restoring it in the future. 2917 * 2918 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 2919 * will not throw an exception if you try to remove an ID that does not 2920 * currently have an associated dialog.</p> 2921 * 2922 * @param id The id of the managed dialog. 2923 * 2924 * @see #onCreateDialog(int, Bundle) 2925 * @see #onPrepareDialog(int, Dialog, Bundle) 2926 * @see #showDialog(int) 2927 * @see #dismissDialog(int) 2928 */ 2929 @Deprecated 2930 public final void removeDialog(int id) { 2931 if (mManagedDialogs != null) { 2932 final ManagedDialog md = mManagedDialogs.get(id); 2933 if (md != null) { 2934 md.mDialog.dismiss(); 2935 mManagedDialogs.remove(id); 2936 } 2937 } 2938 } 2939 2940 /** 2941 * This hook is called when the user signals the desire to start a search. 2942 * 2943 * <p>You can use this function as a simple way to launch the search UI, in response to a 2944 * menu item, search button, or other widgets within your activity. Unless overidden, 2945 * calling this function is the same as calling 2946 * {@link #startSearch startSearch(null, false, null, false)}, which launches 2947 * search for the current activity as specified in its manifest, see {@link SearchManager}. 2948 * 2949 * <p>You can override this function to force global search, e.g. in response to a dedicated 2950 * search key, or to block search entirely (by simply returning false). 2951 * 2952 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 2953 * The default implementation always returns {@code true}. 2954 * 2955 * @see android.app.SearchManager 2956 */ 2957 public boolean onSearchRequested() { 2958 startSearch(null, false, null, false); 2959 return true; 2960 } 2961 2962 /** 2963 * This hook is called to launch the search UI. 2964 * 2965 * <p>It is typically called from onSearchRequested(), either directly from 2966 * Activity.onSearchRequested() or from an overridden version in any given 2967 * Activity. If your goal is simply to activate search, it is preferred to call 2968 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 2969 * is to inject specific data such as context data, it is preferred to <i>override</i> 2970 * onSearchRequested(), so that any callers to it will benefit from the override. 2971 * 2972 * @param initialQuery Any non-null non-empty string will be inserted as 2973 * pre-entered text in the search query box. 2974 * @param selectInitialQuery If true, the intial query will be preselected, which means that 2975 * any further typing will replace it. This is useful for cases where an entire pre-formed 2976 * query is being inserted. If false, the selection point will be placed at the end of the 2977 * inserted query. This is useful when the inserted query is text that the user entered, 2978 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 2979 * if initialQuery is a non-empty string.</i> 2980 * @param appSearchData An application can insert application-specific 2981 * context here, in order to improve quality or specificity of its own 2982 * searches. This data will be returned with SEARCH intent(s). Null if 2983 * no extra data is required. 2984 * @param globalSearch If false, this will only launch the search that has been specifically 2985 * defined by the application (which is usually defined as a local search). If no default 2986 * search is defined in the current application or activity, global search will be launched. 2987 * If true, this will always launch a platform-global (e.g. web-based) search instead. 2988 * 2989 * @see android.app.SearchManager 2990 * @see #onSearchRequested 2991 */ 2992 public void startSearch(String initialQuery, boolean selectInitialQuery, 2993 Bundle appSearchData, boolean globalSearch) { 2994 ensureSearchManager(); 2995 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 2996 appSearchData, globalSearch); 2997 } 2998 2999 /** 3000 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 3001 * the search dialog. Made available for testing purposes. 3002 * 3003 * @param query The query to trigger. If empty, the request will be ignored. 3004 * @param appSearchData An application can insert application-specific 3005 * context here, in order to improve quality or specificity of its own 3006 * searches. This data will be returned with SEARCH intent(s). Null if 3007 * no extra data is required. 3008 */ 3009 public void triggerSearch(String query, Bundle appSearchData) { 3010 ensureSearchManager(); 3011 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 3012 } 3013 3014 /** 3015 * Request that key events come to this activity. Use this if your 3016 * activity has no views with focus, but the activity still wants 3017 * a chance to process key events. 3018 * 3019 * @see android.view.Window#takeKeyEvents 3020 */ 3021 public void takeKeyEvents(boolean get) { 3022 getWindow().takeKeyEvents(get); 3023 } 3024 3025 /** 3026 * Enable extended window features. This is a convenience for calling 3027 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 3028 * 3029 * @param featureId The desired feature as defined in 3030 * {@link android.view.Window}. 3031 * @return Returns true if the requested feature is supported and now 3032 * enabled. 3033 * 3034 * @see android.view.Window#requestFeature 3035 */ 3036 public final boolean requestWindowFeature(int featureId) { 3037 return getWindow().requestFeature(featureId); 3038 } 3039 3040 /** 3041 * Convenience for calling 3042 * {@link android.view.Window#setFeatureDrawableResource}. 3043 */ 3044 public final void setFeatureDrawableResource(int featureId, int resId) { 3045 getWindow().setFeatureDrawableResource(featureId, resId); 3046 } 3047 3048 /** 3049 * Convenience for calling 3050 * {@link android.view.Window#setFeatureDrawableUri}. 3051 */ 3052 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3053 getWindow().setFeatureDrawableUri(featureId, uri); 3054 } 3055 3056 /** 3057 * Convenience for calling 3058 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3059 */ 3060 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3061 getWindow().setFeatureDrawable(featureId, drawable); 3062 } 3063 3064 /** 3065 * Convenience for calling 3066 * {@link android.view.Window#setFeatureDrawableAlpha}. 3067 */ 3068 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3069 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3070 } 3071 3072 /** 3073 * Convenience for calling 3074 * {@link android.view.Window#getLayoutInflater}. 3075 */ 3076 public LayoutInflater getLayoutInflater() { 3077 return getWindow().getLayoutInflater(); 3078 } 3079 3080 /** 3081 * Returns a {@link MenuInflater} with this context. 3082 */ 3083 public MenuInflater getMenuInflater() { 3084 return new MenuInflater(this); 3085 } 3086 3087 @Override 3088 protected void onApplyThemeResource(Resources.Theme theme, int resid, 3089 boolean first) { 3090 if (mParent == null) { 3091 super.onApplyThemeResource(theme, resid, first); 3092 } else { 3093 try { 3094 theme.setTo(mParent.getTheme()); 3095 } catch (Exception e) { 3096 // Empty 3097 } 3098 theme.applyStyle(resid, false); 3099 } 3100 } 3101 3102 /** 3103 * Launch an activity for which you would like a result when it finished. 3104 * When this activity exits, your 3105 * onActivityResult() method will be called with the given requestCode. 3106 * Using a negative requestCode is the same as calling 3107 * {@link #startActivity} (the activity is not launched as a sub-activity). 3108 * 3109 * <p>Note that this method should only be used with Intent protocols 3110 * that are defined to return a result. In other protocols (such as 3111 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 3112 * not get the result when you expect. For example, if the activity you 3113 * are launching uses the singleTask launch mode, it will not run in your 3114 * task and thus you will immediately receive a cancel result. 3115 * 3116 * <p>As a special case, if you call startActivityForResult() with a requestCode 3117 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 3118 * activity, then your window will not be displayed until a result is 3119 * returned back from the started activity. This is to avoid visible 3120 * flickering when redirecting to another activity. 3121 * 3122 * <p>This method throws {@link android.content.ActivityNotFoundException} 3123 * if there was no Activity found to run the given Intent. 3124 * 3125 * @param intent The intent to start. 3126 * @param requestCode If >= 0, this code will be returned in 3127 * onActivityResult() when the activity exits. 3128 * 3129 * @throws android.content.ActivityNotFoundException 3130 * 3131 * @see #startActivity 3132 */ 3133 public void startActivityForResult(Intent intent, int requestCode) { 3134 if (mParent == null) { 3135 Instrumentation.ActivityResult ar = 3136 mInstrumentation.execStartActivity( 3137 this, mMainThread.getApplicationThread(), mToken, this, 3138 intent, requestCode); 3139 if (ar != null) { 3140 mMainThread.sendActivityResult( 3141 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 3142 ar.getResultData()); 3143 } 3144 if (requestCode >= 0) { 3145 // If this start is requesting a result, we can avoid making 3146 // the activity visible until the result is received. Setting 3147 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3148 // activity hidden during this time, to avoid flickering. 3149 // This can only be done when a result is requested because 3150 // that guarantees we will get information back when the 3151 // activity is finished, no matter what happens to it. 3152 mStartedActivity = true; 3153 } 3154 } else { 3155 mParent.startActivityFromChild(this, intent, requestCode); 3156 } 3157 } 3158 3159 /** 3160 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 3161 * to use a IntentSender to describe the activity to be started. If 3162 * the IntentSender is for an activity, that activity will be started 3163 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 3164 * here; otherwise, its associated action will be executed (such as 3165 * sending a broadcast) as if you had called 3166 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 3167 * 3168 * @param intent The IntentSender to launch. 3169 * @param requestCode If >= 0, this code will be returned in 3170 * onActivityResult() when the activity exits. 3171 * @param fillInIntent If non-null, this will be provided as the 3172 * intent parameter to {@link IntentSender#sendIntent}. 3173 * @param flagsMask Intent flags in the original IntentSender that you 3174 * would like to change. 3175 * @param flagsValues Desired values for any bits set in 3176 * <var>flagsMask</var> 3177 * @param extraFlags Always set to 0. 3178 */ 3179 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3180 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3181 throws IntentSender.SendIntentException { 3182 if (mParent == null) { 3183 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3184 flagsMask, flagsValues, this); 3185 } else { 3186 mParent.startIntentSenderFromChild(this, intent, requestCode, 3187 fillInIntent, flagsMask, flagsValues, extraFlags); 3188 } 3189 } 3190 3191 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 3192 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity) 3193 throws IntentSender.SendIntentException { 3194 try { 3195 String resolvedType = null; 3196 if (fillInIntent != null) { 3197 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 3198 } 3199 int result = ActivityManagerNative.getDefault() 3200 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 3201 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 3202 requestCode, flagsMask, flagsValues); 3203 if (result == IActivityManager.START_CANCELED) { 3204 throw new IntentSender.SendIntentException(); 3205 } 3206 Instrumentation.checkStartActivityResult(result, null); 3207 } catch (RemoteException e) { 3208 } 3209 if (requestCode >= 0) { 3210 // If this start is requesting a result, we can avoid making 3211 // the activity visible until the result is received. Setting 3212 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3213 // activity hidden during this time, to avoid flickering. 3214 // This can only be done when a result is requested because 3215 // that guarantees we will get information back when the 3216 // activity is finished, no matter what happens to it. 3217 mStartedActivity = true; 3218 } 3219 } 3220 3221 /** 3222 * Launch a new activity. You will not receive any information about when 3223 * the activity exits. This implementation overrides the base version, 3224 * providing information about 3225 * the activity performing the launch. Because of this additional 3226 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3227 * required; if not specified, the new activity will be added to the 3228 * task of the caller. 3229 * 3230 * <p>This method throws {@link android.content.ActivityNotFoundException} 3231 * if there was no Activity found to run the given Intent. 3232 * 3233 * @param intent The intent to start. 3234 * 3235 * @throws android.content.ActivityNotFoundException 3236 * 3237 * @see #startActivityForResult 3238 */ 3239 @Override 3240 public void startActivity(Intent intent) { 3241 startActivityForResult(intent, -1); 3242 } 3243 3244 /** 3245 * Launch a new activity. You will not receive any information about when 3246 * the activity exits. This implementation overrides the base version, 3247 * providing information about 3248 * the activity performing the launch. Because of this additional 3249 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3250 * required; if not specified, the new activity will be added to the 3251 * task of the caller. 3252 * 3253 * <p>This method throws {@link android.content.ActivityNotFoundException} 3254 * if there was no Activity found to run the given Intent. 3255 * 3256 * @param intents The intents to start. 3257 * 3258 * @throws android.content.ActivityNotFoundException 3259 * 3260 * @see #startActivityForResult 3261 */ 3262 @Override 3263 public void startActivities(Intent[] intents) { 3264 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 3265 mToken, this, intents); 3266 } 3267 3268 /** 3269 * Like {@link #startActivity(Intent)}, but taking a IntentSender 3270 * to start; see 3271 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3272 * for more information. 3273 * 3274 * @param intent The IntentSender to launch. 3275 * @param fillInIntent If non-null, this will be provided as the 3276 * intent parameter to {@link IntentSender#sendIntent}. 3277 * @param flagsMask Intent flags in the original IntentSender that you 3278 * would like to change. 3279 * @param flagsValues Desired values for any bits set in 3280 * <var>flagsMask</var> 3281 * @param extraFlags Always set to 0. 3282 */ 3283 public void startIntentSender(IntentSender intent, 3284 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3285 throws IntentSender.SendIntentException { 3286 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3287 flagsValues, extraFlags); 3288 } 3289 3290 /** 3291 * A special variation to launch an activity only if a new activity 3292 * instance is needed to handle the given Intent. In other words, this is 3293 * just like {@link #startActivityForResult(Intent, int)} except: if you are 3294 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 3295 * singleTask or singleTop 3296 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 3297 * and the activity 3298 * that handles <var>intent</var> is the same as your currently running 3299 * activity, then a new instance is not needed. In this case, instead of 3300 * the normal behavior of calling {@link #onNewIntent} this function will 3301 * return and you can handle the Intent yourself. 3302 * 3303 * <p>This function can only be called from a top-level activity; if it is 3304 * called from a child activity, a runtime exception will be thrown. 3305 * 3306 * @param intent The intent to start. 3307 * @param requestCode If >= 0, this code will be returned in 3308 * onActivityResult() when the activity exits, as described in 3309 * {@link #startActivityForResult}. 3310 * 3311 * @return If a new activity was launched then true is returned; otherwise 3312 * false is returned and you must handle the Intent yourself. 3313 * 3314 * @see #startActivity 3315 * @see #startActivityForResult 3316 */ 3317 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 3318 if (mParent == null) { 3319 int result = IActivityManager.START_RETURN_INTENT_TO_CALLER; 3320 try { 3321 result = ActivityManagerNative.getDefault() 3322 .startActivity(mMainThread.getApplicationThread(), 3323 intent, intent.resolveTypeIfNeeded( 3324 getContentResolver()), 3325 null, 0, 3326 mToken, mEmbeddedID, requestCode, true, false); 3327 } catch (RemoteException e) { 3328 // Empty 3329 } 3330 3331 Instrumentation.checkStartActivityResult(result, intent); 3332 3333 if (requestCode >= 0) { 3334 // If this start is requesting a result, we can avoid making 3335 // the activity visible until the result is received. Setting 3336 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3337 // activity hidden during this time, to avoid flickering. 3338 // This can only be done when a result is requested because 3339 // that guarantees we will get information back when the 3340 // activity is finished, no matter what happens to it. 3341 mStartedActivity = true; 3342 } 3343 return result != IActivityManager.START_RETURN_INTENT_TO_CALLER; 3344 } 3345 3346 throw new UnsupportedOperationException( 3347 "startActivityIfNeeded can only be called from a top-level activity"); 3348 } 3349 3350 /** 3351 * Special version of starting an activity, for use when you are replacing 3352 * other activity components. You can use this to hand the Intent off 3353 * to the next Activity that can handle it. You typically call this in 3354 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3355 * 3356 * @param intent The intent to dispatch to the next activity. For 3357 * correct behavior, this must be the same as the Intent that started 3358 * your own activity; the only changes you can make are to the extras 3359 * inside of it. 3360 * 3361 * @return Returns a boolean indicating whether there was another Activity 3362 * to start: true if there was a next activity to start, false if there 3363 * wasn't. In general, if true is returned you will then want to call 3364 * finish() on yourself. 3365 */ 3366 public boolean startNextMatchingActivity(Intent intent) { 3367 if (mParent == null) { 3368 try { 3369 return ActivityManagerNative.getDefault() 3370 .startNextMatchingActivity(mToken, intent); 3371 } catch (RemoteException e) { 3372 // Empty 3373 } 3374 return false; 3375 } 3376 3377 throw new UnsupportedOperationException( 3378 "startNextMatchingActivity can only be called from a top-level activity"); 3379 } 3380 3381 /** 3382 * This is called when a child activity of this one calls its 3383 * {@link #startActivity} or {@link #startActivityForResult} method. 3384 * 3385 * <p>This method throws {@link android.content.ActivityNotFoundException} 3386 * if there was no Activity found to run the given Intent. 3387 * 3388 * @param child The activity making the call. 3389 * @param intent The intent to start. 3390 * @param requestCode Reply request code. < 0 if reply is not requested. 3391 * 3392 * @throws android.content.ActivityNotFoundException 3393 * 3394 * @see #startActivity 3395 * @see #startActivityForResult 3396 */ 3397 public void startActivityFromChild(Activity child, Intent intent, 3398 int requestCode) { 3399 Instrumentation.ActivityResult ar = 3400 mInstrumentation.execStartActivity( 3401 this, mMainThread.getApplicationThread(), mToken, child, 3402 intent, requestCode); 3403 if (ar != null) { 3404 mMainThread.sendActivityResult( 3405 mToken, child.mEmbeddedID, requestCode, 3406 ar.getResultCode(), ar.getResultData()); 3407 } 3408 } 3409 3410 /** 3411 * This is called when a Fragment in this activity calls its 3412 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 3413 * method. 3414 * 3415 * <p>This method throws {@link android.content.ActivityNotFoundException} 3416 * if there was no Activity found to run the given Intent. 3417 * 3418 * @param fragment The fragment making the call. 3419 * @param intent The intent to start. 3420 * @param requestCode Reply request code. < 0 if reply is not requested. 3421 * 3422 * @throws android.content.ActivityNotFoundException 3423 * 3424 * @see Fragment#startActivity 3425 * @see Fragment#startActivityForResult 3426 */ 3427 public void startActivityFromFragment(Fragment fragment, Intent intent, 3428 int requestCode) { 3429 Instrumentation.ActivityResult ar = 3430 mInstrumentation.execStartActivity( 3431 this, mMainThread.getApplicationThread(), mToken, fragment, 3432 intent, requestCode); 3433 if (ar != null) { 3434 mMainThread.sendActivityResult( 3435 mToken, fragment.mWho, requestCode, 3436 ar.getResultCode(), ar.getResultData()); 3437 } 3438 } 3439 3440 /** 3441 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3442 * taking a IntentSender; see 3443 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3444 * for more information. 3445 */ 3446 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3447 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3448 int extraFlags) 3449 throws IntentSender.SendIntentException { 3450 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3451 flagsMask, flagsValues, child); 3452 } 3453 3454 /** 3455 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3456 * or {@link #finish} to specify an explicit transition animation to 3457 * perform next. 3458 * @param enterAnim A resource ID of the animation resource to use for 3459 * the incoming activity. Use 0 for no animation. 3460 * @param exitAnim A resource ID of the animation resource to use for 3461 * the outgoing activity. Use 0 for no animation. 3462 */ 3463 public void overridePendingTransition(int enterAnim, int exitAnim) { 3464 try { 3465 ActivityManagerNative.getDefault().overridePendingTransition( 3466 mToken, getPackageName(), enterAnim, exitAnim); 3467 } catch (RemoteException e) { 3468 } 3469 } 3470 3471 /** 3472 * Call this to set the result that your activity will return to its 3473 * caller. 3474 * 3475 * @param resultCode The result code to propagate back to the originating 3476 * activity, often RESULT_CANCELED or RESULT_OK 3477 * 3478 * @see #RESULT_CANCELED 3479 * @see #RESULT_OK 3480 * @see #RESULT_FIRST_USER 3481 * @see #setResult(int, Intent) 3482 */ 3483 public final void setResult(int resultCode) { 3484 synchronized (this) { 3485 mResultCode = resultCode; 3486 mResultData = null; 3487 } 3488 } 3489 3490 /** 3491 * Call this to set the result that your activity will return to its 3492 * caller. 3493 * 3494 * @param resultCode The result code to propagate back to the originating 3495 * activity, often RESULT_CANCELED or RESULT_OK 3496 * @param data The data to propagate back to the originating activity. 3497 * 3498 * @see #RESULT_CANCELED 3499 * @see #RESULT_OK 3500 * @see #RESULT_FIRST_USER 3501 * @see #setResult(int) 3502 */ 3503 public final void setResult(int resultCode, Intent data) { 3504 synchronized (this) { 3505 mResultCode = resultCode; 3506 mResultData = data; 3507 } 3508 } 3509 3510 /** 3511 * Return the name of the package that invoked this activity. This is who 3512 * the data in {@link #setResult setResult()} will be sent to. You can 3513 * use this information to validate that the recipient is allowed to 3514 * receive the data. 3515 * 3516 * <p>Note: if the calling activity is not expecting a result (that is it 3517 * did not use the {@link #startActivityForResult} 3518 * form that includes a request code), then the calling package will be 3519 * null. 3520 * 3521 * @return The package of the activity that will receive your 3522 * reply, or null if none. 3523 */ 3524 public String getCallingPackage() { 3525 try { 3526 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 3527 } catch (RemoteException e) { 3528 return null; 3529 } 3530 } 3531 3532 /** 3533 * Return the name of the activity that invoked this activity. This is 3534 * who the data in {@link #setResult setResult()} will be sent to. You 3535 * can use this information to validate that the recipient is allowed to 3536 * receive the data. 3537 * 3538 * <p>Note: if the calling activity is not expecting a result (that is it 3539 * did not use the {@link #startActivityForResult} 3540 * form that includes a request code), then the calling package will be 3541 * null. 3542 * 3543 * @return String The full name of the activity that will receive your 3544 * reply, or null if none. 3545 */ 3546 public ComponentName getCallingActivity() { 3547 try { 3548 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 3549 } catch (RemoteException e) { 3550 return null; 3551 } 3552 } 3553 3554 /** 3555 * Control whether this activity's main window is visible. This is intended 3556 * only for the special case of an activity that is not going to show a 3557 * UI itself, but can't just finish prior to onResume() because it needs 3558 * to wait for a service binding or such. Setting this to false allows 3559 * you to prevent your UI from being shown during that time. 3560 * 3561 * <p>The default value for this is taken from the 3562 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 3563 */ 3564 public void setVisible(boolean visible) { 3565 if (mVisibleFromClient != visible) { 3566 mVisibleFromClient = visible; 3567 if (mVisibleFromServer) { 3568 if (visible) makeVisible(); 3569 else mDecor.setVisibility(View.INVISIBLE); 3570 } 3571 } 3572 } 3573 3574 void makeVisible() { 3575 if (!mWindowAdded) { 3576 ViewManager wm = getWindowManager(); 3577 wm.addView(mDecor, getWindow().getAttributes()); 3578 mWindowAdded = true; 3579 } 3580 mDecor.setVisibility(View.VISIBLE); 3581 } 3582 3583 /** 3584 * Check to see whether this activity is in the process of finishing, 3585 * either because you called {@link #finish} on it or someone else 3586 * has requested that it finished. This is often used in 3587 * {@link #onPause} to determine whether the activity is simply pausing or 3588 * completely finishing. 3589 * 3590 * @return If the activity is finishing, returns true; else returns false. 3591 * 3592 * @see #finish 3593 */ 3594 public boolean isFinishing() { 3595 return mFinished; 3596 } 3597 3598 /** 3599 * Check to see whether this activity is in the process of being destroyed in order to be 3600 * recreated with a new configuration. This is often used in 3601 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 3602 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 3603 * 3604 * @return If the activity is being torn down in order to be recreated with a new configuration, 3605 * returns true; else returns false. 3606 */ 3607 public boolean isChangingConfigurations() { 3608 return mChangingConfigurations; 3609 } 3610 3611 /** 3612 * Cause this Activity to be recreated with a new instance. This results 3613 * in essentially the same flow as when the Activity is created due to 3614 * a configuration change -- the current instance will go through its 3615 * lifecycle to {@link #onDestroy} and a new instance then created after it. 3616 */ 3617 public void recreate() { 3618 if (mParent != null) { 3619 throw new IllegalStateException("Can only be called on top-level activity"); 3620 } 3621 if (Looper.myLooper() != mMainThread.getLooper()) { 3622 throw new IllegalStateException("Must be called from main thread"); 3623 } 3624 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, false); 3625 } 3626 3627 /** 3628 * Call this when your activity is done and should be closed. The 3629 * ActivityResult is propagated back to whoever launched you via 3630 * onActivityResult(). 3631 */ 3632 public void finish() { 3633 if (mParent == null) { 3634 int resultCode; 3635 Intent resultData; 3636 synchronized (this) { 3637 resultCode = mResultCode; 3638 resultData = mResultData; 3639 } 3640 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 3641 try { 3642 if (ActivityManagerNative.getDefault() 3643 .finishActivity(mToken, resultCode, resultData)) { 3644 mFinished = true; 3645 } 3646 } catch (RemoteException e) { 3647 // Empty 3648 } 3649 } else { 3650 mParent.finishFromChild(this); 3651 } 3652 } 3653 3654 /** 3655 * This is called when a child activity of this one calls its 3656 * {@link #finish} method. The default implementation simply calls 3657 * finish() on this activity (the parent), finishing the entire group. 3658 * 3659 * @param child The activity making the call. 3660 * 3661 * @see #finish 3662 */ 3663 public void finishFromChild(Activity child) { 3664 finish(); 3665 } 3666 3667 /** 3668 * Force finish another activity that you had previously started with 3669 * {@link #startActivityForResult}. 3670 * 3671 * @param requestCode The request code of the activity that you had 3672 * given to startActivityForResult(). If there are multiple 3673 * activities started with this request code, they 3674 * will all be finished. 3675 */ 3676 public void finishActivity(int requestCode) { 3677 if (mParent == null) { 3678 try { 3679 ActivityManagerNative.getDefault() 3680 .finishSubActivity(mToken, mEmbeddedID, requestCode); 3681 } catch (RemoteException e) { 3682 // Empty 3683 } 3684 } else { 3685 mParent.finishActivityFromChild(this, requestCode); 3686 } 3687 } 3688 3689 /** 3690 * This is called when a child activity of this one calls its 3691 * finishActivity(). 3692 * 3693 * @param child The activity making the call. 3694 * @param requestCode Request code that had been used to start the 3695 * activity. 3696 */ 3697 public void finishActivityFromChild(Activity child, int requestCode) { 3698 try { 3699 ActivityManagerNative.getDefault() 3700 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 3701 } catch (RemoteException e) { 3702 // Empty 3703 } 3704 } 3705 3706 /** 3707 * Called when an activity you launched exits, giving you the requestCode 3708 * you started it with, the resultCode it returned, and any additional 3709 * data from it. The <var>resultCode</var> will be 3710 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 3711 * didn't return any result, or crashed during its operation. 3712 * 3713 * <p>You will receive this call immediately before onResume() when your 3714 * activity is re-starting. 3715 * 3716 * @param requestCode The integer request code originally supplied to 3717 * startActivityForResult(), allowing you to identify who this 3718 * result came from. 3719 * @param resultCode The integer result code returned by the child activity 3720 * through its setResult(). 3721 * @param data An Intent, which can return result data to the caller 3722 * (various data can be attached to Intent "extras"). 3723 * 3724 * @see #startActivityForResult 3725 * @see #createPendingResult 3726 * @see #setResult(int) 3727 */ 3728 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 3729 } 3730 3731 /** 3732 * Create a new PendingIntent object which you can hand to others 3733 * for them to use to send result data back to your 3734 * {@link #onActivityResult} callback. The created object will be either 3735 * one-shot (becoming invalid after a result is sent back) or multiple 3736 * (allowing any number of results to be sent through it). 3737 * 3738 * @param requestCode Private request code for the sender that will be 3739 * associated with the result data when it is returned. The sender can not 3740 * modify this value, allowing you to identify incoming results. 3741 * @param data Default data to supply in the result, which may be modified 3742 * by the sender. 3743 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 3744 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 3745 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 3746 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 3747 * or any of the flags as supported by 3748 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 3749 * of the intent that can be supplied when the actual send happens. 3750 * 3751 * @return Returns an existing or new PendingIntent matching the given 3752 * parameters. May return null only if 3753 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 3754 * supplied. 3755 * 3756 * @see PendingIntent 3757 */ 3758 public PendingIntent createPendingResult(int requestCode, Intent data, 3759 int flags) { 3760 String packageName = getPackageName(); 3761 try { 3762 IIntentSender target = 3763 ActivityManagerNative.getDefault().getIntentSender( 3764 IActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 3765 mParent == null ? mToken : mParent.mToken, 3766 mEmbeddedID, requestCode, new Intent[] { data }, null, flags); 3767 return target != null ? new PendingIntent(target) : null; 3768 } catch (RemoteException e) { 3769 // Empty 3770 } 3771 return null; 3772 } 3773 3774 /** 3775 * Change the desired orientation of this activity. If the activity 3776 * is currently in the foreground or otherwise impacting the screen 3777 * orientation, the screen will immediately be changed (possibly causing 3778 * the activity to be restarted). Otherwise, this will be used the next 3779 * time the activity is visible. 3780 * 3781 * @param requestedOrientation An orientation constant as used in 3782 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3783 */ 3784 public void setRequestedOrientation(int requestedOrientation) { 3785 if (mParent == null) { 3786 try { 3787 ActivityManagerNative.getDefault().setRequestedOrientation( 3788 mToken, requestedOrientation); 3789 } catch (RemoteException e) { 3790 // Empty 3791 } 3792 } else { 3793 mParent.setRequestedOrientation(requestedOrientation); 3794 } 3795 } 3796 3797 /** 3798 * Return the current requested orientation of the activity. This will 3799 * either be the orientation requested in its component's manifest, or 3800 * the last requested orientation given to 3801 * {@link #setRequestedOrientation(int)}. 3802 * 3803 * @return Returns an orientation constant as used in 3804 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3805 */ 3806 public int getRequestedOrientation() { 3807 if (mParent == null) { 3808 try { 3809 return ActivityManagerNative.getDefault() 3810 .getRequestedOrientation(mToken); 3811 } catch (RemoteException e) { 3812 // Empty 3813 } 3814 } else { 3815 return mParent.getRequestedOrientation(); 3816 } 3817 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 3818 } 3819 3820 /** 3821 * Return the identifier of the task this activity is in. This identifier 3822 * will remain the same for the lifetime of the activity. 3823 * 3824 * @return Task identifier, an opaque integer. 3825 */ 3826 public int getTaskId() { 3827 try { 3828 return ActivityManagerNative.getDefault() 3829 .getTaskForActivity(mToken, false); 3830 } catch (RemoteException e) { 3831 return -1; 3832 } 3833 } 3834 3835 /** 3836 * Return whether this activity is the root of a task. The root is the 3837 * first activity in a task. 3838 * 3839 * @return True if this is the root activity, else false. 3840 */ 3841 public boolean isTaskRoot() { 3842 try { 3843 return ActivityManagerNative.getDefault() 3844 .getTaskForActivity(mToken, true) >= 0; 3845 } catch (RemoteException e) { 3846 return false; 3847 } 3848 } 3849 3850 /** 3851 * Move the task containing this activity to the back of the activity 3852 * stack. The activity's order within the task is unchanged. 3853 * 3854 * @param nonRoot If false then this only works if the activity is the root 3855 * of a task; if true it will work for any activity in 3856 * a task. 3857 * 3858 * @return If the task was moved (or it was already at the 3859 * back) true is returned, else false. 3860 */ 3861 public boolean moveTaskToBack(boolean nonRoot) { 3862 try { 3863 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 3864 mToken, nonRoot); 3865 } catch (RemoteException e) { 3866 // Empty 3867 } 3868 return false; 3869 } 3870 3871 /** 3872 * Returns class name for this activity with the package prefix removed. 3873 * This is the default name used to read and write settings. 3874 * 3875 * @return The local class name. 3876 */ 3877 public String getLocalClassName() { 3878 final String pkg = getPackageName(); 3879 final String cls = mComponent.getClassName(); 3880 int packageLen = pkg.length(); 3881 if (!cls.startsWith(pkg) || cls.length() <= packageLen 3882 || cls.charAt(packageLen) != '.') { 3883 return cls; 3884 } 3885 return cls.substring(packageLen+1); 3886 } 3887 3888 /** 3889 * Returns complete component name of this activity. 3890 * 3891 * @return Returns the complete component name for this activity 3892 */ 3893 public ComponentName getComponentName() 3894 { 3895 return mComponent; 3896 } 3897 3898 /** 3899 * Retrieve a {@link SharedPreferences} object for accessing preferences 3900 * that are private to this activity. This simply calls the underlying 3901 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 3902 * class name as the preferences name. 3903 * 3904 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 3905 * operation, {@link #MODE_WORLD_READABLE} and 3906 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 3907 * 3908 * @return Returns the single SharedPreferences instance that can be used 3909 * to retrieve and modify the preference values. 3910 */ 3911 public SharedPreferences getPreferences(int mode) { 3912 return getSharedPreferences(getLocalClassName(), mode); 3913 } 3914 3915 private void ensureSearchManager() { 3916 if (mSearchManager != null) { 3917 return; 3918 } 3919 3920 mSearchManager = new SearchManager(this, null); 3921 } 3922 3923 @Override 3924 public Object getSystemService(String name) { 3925 if (getBaseContext() == null) { 3926 throw new IllegalStateException( 3927 "System services not available to Activities before onCreate()"); 3928 } 3929 3930 if (WINDOW_SERVICE.equals(name)) { 3931 return mWindowManager; 3932 } else if (SEARCH_SERVICE.equals(name)) { 3933 ensureSearchManager(); 3934 return mSearchManager; 3935 } 3936 return super.getSystemService(name); 3937 } 3938 3939 /** 3940 * Change the title associated with this activity. If this is a 3941 * top-level activity, the title for its window will change. If it 3942 * is an embedded activity, the parent can do whatever it wants 3943 * with it. 3944 */ 3945 public void setTitle(CharSequence title) { 3946 mTitle = title; 3947 onTitleChanged(title, mTitleColor); 3948 3949 if (mParent != null) { 3950 mParent.onChildTitleChanged(this, title); 3951 } 3952 } 3953 3954 /** 3955 * Change the title associated with this activity. If this is a 3956 * top-level activity, the title for its window will change. If it 3957 * is an embedded activity, the parent can do whatever it wants 3958 * with it. 3959 */ 3960 public void setTitle(int titleId) { 3961 setTitle(getText(titleId)); 3962 } 3963 3964 public void setTitleColor(int textColor) { 3965 mTitleColor = textColor; 3966 onTitleChanged(mTitle, textColor); 3967 } 3968 3969 public final CharSequence getTitle() { 3970 return mTitle; 3971 } 3972 3973 public final int getTitleColor() { 3974 return mTitleColor; 3975 } 3976 3977 protected void onTitleChanged(CharSequence title, int color) { 3978 if (mTitleReady) { 3979 final Window win = getWindow(); 3980 if (win != null) { 3981 win.setTitle(title); 3982 if (color != 0) { 3983 win.setTitleColor(color); 3984 } 3985 } 3986 } 3987 } 3988 3989 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 3990 } 3991 3992 /** 3993 * Sets the visibility of the progress bar in the title. 3994 * <p> 3995 * In order for the progress bar to be shown, the feature must be requested 3996 * via {@link #requestWindowFeature(int)}. 3997 * 3998 * @param visible Whether to show the progress bars in the title. 3999 */ 4000 public final void setProgressBarVisibility(boolean visible) { 4001 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 4002 Window.PROGRESS_VISIBILITY_OFF); 4003 } 4004 4005 /** 4006 * Sets the visibility of the indeterminate progress bar in the title. 4007 * <p> 4008 * In order for the progress bar to be shown, the feature must be requested 4009 * via {@link #requestWindowFeature(int)}. 4010 * 4011 * @param visible Whether to show the progress bars in the title. 4012 */ 4013 public final void setProgressBarIndeterminateVisibility(boolean visible) { 4014 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 4015 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 4016 } 4017 4018 /** 4019 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 4020 * is always indeterminate). 4021 * <p> 4022 * In order for the progress bar to be shown, the feature must be requested 4023 * via {@link #requestWindowFeature(int)}. 4024 * 4025 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 4026 */ 4027 public final void setProgressBarIndeterminate(boolean indeterminate) { 4028 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4029 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 4030 } 4031 4032 /** 4033 * Sets the progress for the progress bars in the title. 4034 * <p> 4035 * In order for the progress bar to be shown, the feature must be requested 4036 * via {@link #requestWindowFeature(int)}. 4037 * 4038 * @param progress The progress for the progress bar. Valid ranges are from 4039 * 0 to 10000 (both inclusive). If 10000 is given, the progress 4040 * bar will be completely filled and will fade out. 4041 */ 4042 public final void setProgress(int progress) { 4043 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 4044 } 4045 4046 /** 4047 * Sets the secondary progress for the progress bar in the title. This 4048 * progress is drawn between the primary progress (set via 4049 * {@link #setProgress(int)} and the background. It can be ideal for media 4050 * scenarios such as showing the buffering progress while the default 4051 * progress shows the play progress. 4052 * <p> 4053 * In order for the progress bar to be shown, the feature must be requested 4054 * via {@link #requestWindowFeature(int)}. 4055 * 4056 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 4057 * 0 to 10000 (both inclusive). 4058 */ 4059 public final void setSecondaryProgress(int secondaryProgress) { 4060 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4061 secondaryProgress + Window.PROGRESS_SECONDARY_START); 4062 } 4063 4064 /** 4065 * Suggests an audio stream whose volume should be changed by the hardware 4066 * volume controls. 4067 * <p> 4068 * The suggested audio stream will be tied to the window of this Activity. 4069 * If the Activity is switched, the stream set here is no longer the 4070 * suggested stream. The client does not need to save and restore the old 4071 * suggested stream value in onPause and onResume. 4072 * 4073 * @param streamType The type of the audio stream whose volume should be 4074 * changed by the hardware volume controls. It is not guaranteed that 4075 * the hardware volume controls will always change this stream's 4076 * volume (for example, if a call is in progress, its stream's volume 4077 * may be changed instead). To reset back to the default, use 4078 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 4079 */ 4080 public final void setVolumeControlStream(int streamType) { 4081 getWindow().setVolumeControlStream(streamType); 4082 } 4083 4084 /** 4085 * Gets the suggested audio stream whose volume should be changed by the 4086 * harwdare volume controls. 4087 * 4088 * @return The suggested audio stream type whose volume should be changed by 4089 * the hardware volume controls. 4090 * @see #setVolumeControlStream(int) 4091 */ 4092 public final int getVolumeControlStream() { 4093 return getWindow().getVolumeControlStream(); 4094 } 4095 4096 /** 4097 * Runs the specified action on the UI thread. If the current thread is the UI 4098 * thread, then the action is executed immediately. If the current thread is 4099 * not the UI thread, the action is posted to the event queue of the UI thread. 4100 * 4101 * @param action the action to run on the UI thread 4102 */ 4103 public final void runOnUiThread(Runnable action) { 4104 if (Thread.currentThread() != mUiThread) { 4105 mHandler.post(action); 4106 } else { 4107 action.run(); 4108 } 4109 } 4110 4111 /** 4112 * Standard implementation of 4113 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 4114 * inflating with the LayoutInflater returned by {@link #getSystemService}. 4115 * This implementation does nothing and is for 4116 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 4117 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 4118 * 4119 * @see android.view.LayoutInflater#createView 4120 * @see android.view.Window#getLayoutInflater 4121 */ 4122 public View onCreateView(String name, Context context, AttributeSet attrs) { 4123 return null; 4124 } 4125 4126 /** 4127 * Standard implementation of 4128 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 4129 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 4130 * This implementation handles <fragment> tags to embed fragments inside 4131 * of the activity. 4132 * 4133 * @see android.view.LayoutInflater#createView 4134 * @see android.view.Window#getLayoutInflater 4135 */ 4136 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 4137 if (!"fragment".equals(name)) { 4138 return onCreateView(name, context, attrs); 4139 } 4140 4141 String fname = attrs.getAttributeValue(null, "class"); 4142 TypedArray a = 4143 context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Fragment); 4144 if (fname == null) { 4145 fname = a.getString(com.android.internal.R.styleable.Fragment_name); 4146 } 4147 int id = a.getResourceId(com.android.internal.R.styleable.Fragment_id, View.NO_ID); 4148 String tag = a.getString(com.android.internal.R.styleable.Fragment_tag); 4149 a.recycle(); 4150 4151 int containerId = parent != null ? parent.getId() : 0; 4152 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 4153 throw new IllegalArgumentException(attrs.getPositionDescription() 4154 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 4155 } 4156 4157 // If we restored from a previous state, we may already have 4158 // instantiated this fragment from the state and should use 4159 // that instance instead of making a new one. 4160 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 4161 if (fragment == null && tag != null) { 4162 fragment = mFragments.findFragmentByTag(tag); 4163 } 4164 if (fragment == null && containerId != View.NO_ID) { 4165 fragment = mFragments.findFragmentById(containerId); 4166 } 4167 4168 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 4169 + Integer.toHexString(id) + " fname=" + fname 4170 + " existing=" + fragment); 4171 if (fragment == null) { 4172 fragment = Fragment.instantiate(this, fname); 4173 fragment.mFromLayout = true; 4174 fragment.mFragmentId = id != 0 ? id : containerId; 4175 fragment.mContainerId = containerId; 4176 fragment.mTag = tag; 4177 fragment.mInLayout = true; 4178 fragment.mImmediateActivity = this; 4179 fragment.mFragmentManager = mFragments; 4180 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4181 mFragments.addFragment(fragment, true); 4182 4183 } else if (fragment.mInLayout) { 4184 // A fragment already exists and it is not one we restored from 4185 // previous state. 4186 throw new IllegalArgumentException(attrs.getPositionDescription() 4187 + ": Duplicate id 0x" + Integer.toHexString(id) 4188 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 4189 + " with another fragment for " + fname); 4190 } else { 4191 // This fragment was retained from a previous instance; get it 4192 // going now. 4193 fragment.mInLayout = true; 4194 fragment.mImmediateActivity = this; 4195 // If this fragment is newly instantiated (either right now, or 4196 // from last saved state), then give it the attributes to 4197 // initialize itself. 4198 if (!fragment.mRetaining) { 4199 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4200 } 4201 mFragments.moveToState(fragment); 4202 } 4203 4204 if (fragment.mView == null) { 4205 throw new IllegalStateException("Fragment " + fname 4206 + " did not create a view."); 4207 } 4208 if (id != 0) { 4209 fragment.mView.setId(id); 4210 } 4211 if (fragment.mView.getTag() == null) { 4212 fragment.mView.setTag(tag); 4213 } 4214 return fragment.mView; 4215 } 4216 4217 /** 4218 * Print the Activity's state into the given stream. This gets invoked if 4219 * you run "adb shell dumpsys activity <activity_component_name>". 4220 * 4221 * @param prefix Desired prefix to prepend at each line of output. 4222 * @param fd The raw file descriptor that the dump is being sent to. 4223 * @param writer The PrintWriter to which you should dump your state. This will be 4224 * closed for you after you return. 4225 * @param args additional arguments to the dump request. 4226 */ 4227 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4228 writer.print(prefix); writer.print("Local Activity "); 4229 writer.print(Integer.toHexString(System.identityHashCode(this))); 4230 writer.println(" State:"); 4231 String innerPrefix = prefix + " "; 4232 writer.print(innerPrefix); writer.print("mResumed="); 4233 writer.print(mResumed); writer.print(" mStopped="); 4234 writer.print(mStopped); writer.print(" mFinished="); 4235 writer.println(mFinished); 4236 writer.print(innerPrefix); writer.print("mLoadersStarted="); 4237 writer.println(mLoadersStarted); 4238 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 4239 writer.println(mChangingConfigurations); 4240 writer.print(innerPrefix); writer.print("mCurrentConfig="); 4241 writer.println(mCurrentConfig); 4242 if (mLoaderManager != null) { 4243 writer.print(prefix); writer.print("Loader Manager "); 4244 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 4245 writer.println(":"); 4246 mLoaderManager.dump(prefix + " ", fd, writer, args); 4247 } 4248 mFragments.dump(prefix, fd, writer, args); 4249 } 4250 4251 /** 4252 * Bit indicating that this activity is "immersive" and should not be 4253 * interrupted by notifications if possible. 4254 * 4255 * This value is initially set by the manifest property 4256 * <code>android:immersive</code> but may be changed at runtime by 4257 * {@link #setImmersive}. 4258 * 4259 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4260 * @hide 4261 */ 4262 public boolean isImmersive() { 4263 try { 4264 return ActivityManagerNative.getDefault().isImmersive(mToken); 4265 } catch (RemoteException e) { 4266 return false; 4267 } 4268 } 4269 4270 /** 4271 * Adjust the current immersive mode setting. 4272 * 4273 * Note that changing this value will have no effect on the activity's 4274 * {@link android.content.pm.ActivityInfo} structure; that is, if 4275 * <code>android:immersive</code> is set to <code>true</code> 4276 * in the application's manifest entry for this activity, the {@link 4277 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 4278 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4279 * FLAG_IMMERSIVE} bit set. 4280 * 4281 * @see #isImmersive 4282 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4283 * @hide 4284 */ 4285 public void setImmersive(boolean i) { 4286 try { 4287 ActivityManagerNative.getDefault().setImmersive(mToken, i); 4288 } catch (RemoteException e) { 4289 // pass 4290 } 4291 } 4292 4293 /** 4294 * Start an action mode. 4295 * 4296 * @param callback Callback that will manage lifecycle events for this context mode 4297 * @return The ContextMode that was started, or null if it was canceled 4298 * 4299 * @see ActionMode 4300 */ 4301 public ActionMode startActionMode(ActionMode.Callback callback) { 4302 return mWindow.getDecorView().startActionMode(callback); 4303 } 4304 4305 /** 4306 * Give the Activity a chance to control the UI for an action mode requested 4307 * by the system. 4308 * 4309 * <p>Note: If you are looking for a notification callback that an action mode 4310 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 4311 * 4312 * @param callback The callback that should control the new action mode 4313 * @return The new action mode, or <code>null</code> if the activity does not want to 4314 * provide special handling for this action mode. (It will be handled by the system.) 4315 */ 4316 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 4317 initActionBar(); 4318 if (mActionBar != null) { 4319 return mActionBar.startActionMode(callback); 4320 } 4321 return null; 4322 } 4323 4324 /** 4325 * Notifies the Activity that an action mode has been started. 4326 * Activity subclasses overriding this method should call the superclass implementation. 4327 * 4328 * @param mode The new action mode. 4329 */ 4330 public void onActionModeStarted(ActionMode mode) { 4331 } 4332 4333 /** 4334 * Notifies the activity that an action mode has finished. 4335 * Activity subclasses overriding this method should call the superclass implementation. 4336 * 4337 * @param mode The action mode that just finished. 4338 */ 4339 public void onActionModeFinished(ActionMode mode) { 4340 } 4341 4342 // ------------------ Internal API ------------------ 4343 4344 final void setParent(Activity parent) { 4345 mParent = parent; 4346 } 4347 4348 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 4349 Application application, Intent intent, ActivityInfo info, CharSequence title, 4350 Activity parent, String id, NonConfigurationInstances lastNonConfigurationInstances, 4351 Configuration config) { 4352 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 4353 lastNonConfigurationInstances, config); 4354 } 4355 4356 final void attach(Context context, ActivityThread aThread, 4357 Instrumentation instr, IBinder token, int ident, 4358 Application application, Intent intent, ActivityInfo info, 4359 CharSequence title, Activity parent, String id, 4360 NonConfigurationInstances lastNonConfigurationInstances, 4361 Configuration config) { 4362 attachBaseContext(context); 4363 4364 mFragments.attachActivity(this); 4365 4366 mWindow = PolicyManager.makeNewWindow(this); 4367 mWindow.setCallback(this); 4368 mWindow.getLayoutInflater().setPrivateFactory(this); 4369 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 4370 mWindow.setSoftInputMode(info.softInputMode); 4371 } 4372 mUiThread = Thread.currentThread(); 4373 4374 mMainThread = aThread; 4375 mInstrumentation = instr; 4376 mToken = token; 4377 mIdent = ident; 4378 mApplication = application; 4379 mIntent = intent; 4380 mComponent = intent.getComponent(); 4381 mActivityInfo = info; 4382 mTitle = title; 4383 mParent = parent; 4384 mEmbeddedID = id; 4385 mLastNonConfigurationInstances = lastNonConfigurationInstances; 4386 4387 mWindow.setWindowManager(null, mToken, mComponent.flattenToString(), 4388 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 4389 if (mParent != null) { 4390 mWindow.setContainer(mParent.getWindow()); 4391 } 4392 mWindowManager = mWindow.getWindowManager(); 4393 mCurrentConfig = config; 4394 } 4395 4396 final IBinder getActivityToken() { 4397 return mParent != null ? mParent.getActivityToken() : mToken; 4398 } 4399 4400 final void performCreate(Bundle icicle) { 4401 onCreate(icicle); 4402 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 4403 com.android.internal.R.styleable.Window_windowNoDisplay, false); 4404 mFragments.dispatchActivityCreated(); 4405 } 4406 4407 final void performStart() { 4408 mFragments.noteStateNotSaved(); 4409 mCalled = false; 4410 mFragments.execPendingActions(); 4411 mInstrumentation.callActivityOnStart(this); 4412 if (!mCalled) { 4413 throw new SuperNotCalledException( 4414 "Activity " + mComponent.toShortString() + 4415 " did not call through to super.onStart()"); 4416 } 4417 mFragments.dispatchStart(); 4418 if (mAllLoaderManagers != null) { 4419 for (int i=mAllLoaderManagers.size()-1; i>=0; i--) { 4420 LoaderManagerImpl lm = mAllLoaderManagers.valueAt(i); 4421 lm.finishRetain(); 4422 lm.doReportStart(); 4423 } 4424 } 4425 } 4426 4427 final void performRestart() { 4428 mFragments.noteStateNotSaved(); 4429 4430 if (mStopped) { 4431 mStopped = false; 4432 if (mToken != null && mParent == null) { 4433 WindowManagerImpl.getDefault().setStoppedState(mToken, false); 4434 } 4435 4436 synchronized (mManagedCursors) { 4437 final int N = mManagedCursors.size(); 4438 for (int i=0; i<N; i++) { 4439 ManagedCursor mc = mManagedCursors.get(i); 4440 if (mc.mReleased || mc.mUpdated) { 4441 if (!mc.mCursor.requery()) { 4442 throw new IllegalStateException( 4443 "trying to requery an already closed cursor " 4444 + mc.mCursor); 4445 } 4446 mc.mReleased = false; 4447 mc.mUpdated = false; 4448 } 4449 } 4450 } 4451 4452 mCalled = false; 4453 mInstrumentation.callActivityOnRestart(this); 4454 if (!mCalled) { 4455 throw new SuperNotCalledException( 4456 "Activity " + mComponent.toShortString() + 4457 " did not call through to super.onRestart()"); 4458 } 4459 performStart(); 4460 } 4461 } 4462 4463 final void performResume() { 4464 performRestart(); 4465 4466 mFragments.execPendingActions(); 4467 4468 mLastNonConfigurationInstances = null; 4469 4470 mCalled = false; 4471 // mResumed is set by the instrumentation 4472 mInstrumentation.callActivityOnResume(this); 4473 if (!mCalled) { 4474 throw new SuperNotCalledException( 4475 "Activity " + mComponent.toShortString() + 4476 " did not call through to super.onResume()"); 4477 } 4478 4479 // Now really resume, and install the current status bar and menu. 4480 mCalled = false; 4481 4482 mFragments.dispatchResume(); 4483 mFragments.execPendingActions(); 4484 4485 onPostResume(); 4486 if (!mCalled) { 4487 throw new SuperNotCalledException( 4488 "Activity " + mComponent.toShortString() + 4489 " did not call through to super.onPostResume()"); 4490 } 4491 } 4492 4493 final void performPause() { 4494 mFragments.dispatchPause(); 4495 mCalled = false; 4496 onPause(); 4497 mResumed = false; 4498 if (!mCalled && getApplicationInfo().targetSdkVersion 4499 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 4500 throw new SuperNotCalledException( 4501 "Activity " + mComponent.toShortString() + 4502 " did not call through to super.onPause()"); 4503 } 4504 mResumed = false; 4505 } 4506 4507 final void performUserLeaving() { 4508 onUserInteraction(); 4509 onUserLeaveHint(); 4510 } 4511 4512 final void performStop() { 4513 if (mLoadersStarted) { 4514 mLoadersStarted = false; 4515 if (mLoaderManager != null) { 4516 if (!mChangingConfigurations) { 4517 mLoaderManager.doStop(); 4518 } else { 4519 mLoaderManager.doRetain(); 4520 } 4521 } 4522 } 4523 4524 if (!mStopped) { 4525 if (mWindow != null) { 4526 mWindow.closeAllPanels(); 4527 } 4528 4529 if (mToken != null && mParent == null) { 4530 WindowManagerImpl.getDefault().setStoppedState(mToken, true); 4531 } 4532 4533 mFragments.dispatchStop(); 4534 4535 mCalled = false; 4536 mInstrumentation.callActivityOnStop(this); 4537 if (!mCalled) { 4538 throw new SuperNotCalledException( 4539 "Activity " + mComponent.toShortString() + 4540 " did not call through to super.onStop()"); 4541 } 4542 4543 synchronized (mManagedCursors) { 4544 final int N = mManagedCursors.size(); 4545 for (int i=0; i<N; i++) { 4546 ManagedCursor mc = mManagedCursors.get(i); 4547 if (!mc.mReleased) { 4548 mc.mCursor.deactivate(); 4549 mc.mReleased = true; 4550 } 4551 } 4552 } 4553 4554 mStopped = true; 4555 } 4556 mResumed = false; 4557 4558 // Check for Activity leaks, if enabled. 4559 StrictMode.conditionallyCheckInstanceCounts(); 4560 } 4561 4562 final void performDestroy() { 4563 mWindow.destroy(); 4564 mFragments.dispatchDestroy(); 4565 onDestroy(); 4566 if (mLoaderManager != null) { 4567 mLoaderManager.doDestroy(); 4568 } 4569 } 4570 4571 /** 4572 * @hide 4573 */ 4574 public final boolean isResumed() { 4575 return mResumed; 4576 } 4577 4578 void dispatchActivityResult(String who, int requestCode, 4579 int resultCode, Intent data) { 4580 if (false) Log.v( 4581 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 4582 + ", resCode=" + resultCode + ", data=" + data); 4583 mFragments.noteStateNotSaved(); 4584 if (who == null) { 4585 onActivityResult(requestCode, resultCode, data); 4586 } else { 4587 Fragment frag = mFragments.findFragmentByWho(who); 4588 if (frag != null) { 4589 frag.onActivityResult(requestCode, resultCode, data); 4590 } 4591 } 4592 } 4593} 4594