Activity.java revision 2dedce6e84679ead961a485c7fe4b0f77c713b6a
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.policy.PolicyManager; 20 21import android.content.ComponentCallbacks; 22import android.content.ComponentName; 23import android.content.ContentResolver; 24import android.content.Context; 25import android.content.Intent; 26import android.content.IIntentSender; 27import android.content.IntentSender; 28import android.content.SharedPreferences; 29import android.content.pm.ActivityInfo; 30import android.content.res.Configuration; 31import android.content.res.Resources; 32import android.database.Cursor; 33import android.graphics.Bitmap; 34import android.graphics.Canvas; 35import android.graphics.drawable.Drawable; 36import android.media.AudioManager; 37import android.net.Uri; 38import android.os.Build; 39import android.os.Bundle; 40import android.os.Handler; 41import android.os.IBinder; 42import android.os.Looper; 43import android.os.RemoteException; 44import android.text.Selection; 45import android.text.SpannableStringBuilder; 46import android.text.TextUtils; 47import android.text.method.TextKeyListener; 48import android.util.AttributeSet; 49import android.util.Config; 50import android.util.EventLog; 51import android.util.Log; 52import android.util.SparseArray; 53import android.view.ContextMenu; 54import android.view.ContextThemeWrapper; 55import android.view.KeyEvent; 56import android.view.LayoutInflater; 57import android.view.Menu; 58import android.view.MenuInflater; 59import android.view.MenuItem; 60import android.view.MotionEvent; 61import android.view.View; 62import android.view.ViewGroup; 63import android.view.ViewManager; 64import android.view.Window; 65import android.view.WindowManager; 66import android.view.ContextMenu.ContextMenuInfo; 67import android.view.View.OnCreateContextMenuListener; 68import android.view.ViewGroup.LayoutParams; 69import android.view.accessibility.AccessibilityEvent; 70import android.widget.AdapterView; 71 72import java.util.ArrayList; 73import java.util.HashMap; 74 75/** 76 * An activity is a single, focused thing that the user can do. Almost all 77 * activities interact with the user, so the Activity class takes care of 78 * creating a window for you in which you can place your UI with 79 * {@link #setContentView}. While activities are often presented to the user 80 * as full-screen windows, they can also be used in other ways: as floating 81 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 82 * or embedded inside of another activity (using {@link ActivityGroup}). 83 * 84 * There are two methods almost all subclasses of Activity will implement: 85 * 86 * <ul> 87 * <li> {@link #onCreate} is where you initialize your activity. Most 88 * importantly, here you will usually call {@link #setContentView(int)} 89 * with a layout resource defining your UI, and using {@link #findViewById} 90 * to retrieve the widgets in that UI that you need to interact with 91 * programmatically. 92 * 93 * <li> {@link #onPause} is where you deal with the user leaving your 94 * activity. Most importantly, any changes made by the user should at this 95 * point be committed (usually to the 96 * {@link android.content.ContentProvider} holding the data). 97 * </ul> 98 * 99 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 100 * activity classes must have a corresponding 101 * {@link android.R.styleable#AndroidManifestActivity <activity>} 102 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 103 * 104 * <p>The Activity class is an important part of an application's overall lifecycle, 105 * and the way activities are launched and put together is a fundamental 106 * part of the platform's application model. For a detailed perspective on the structure of 107 * Android applications and lifecycles, please read the <em>Dev Guide</em> document on 108 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a>.</p> 109 * 110 * <p>Topics covered here: 111 * <ol> 112 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 113 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 114 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 115 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 116 * <li><a href="#Permissions">Permissions</a> 117 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 118 * </ol> 119 * 120 * <a name="ActivityLifecycle"></a> 121 * <h3>Activity Lifecycle</h3> 122 * 123 * <p>Activities in the system are managed as an <em>activity stack</em>. 124 * When a new activity is started, it is placed on the top of the stack 125 * and becomes the running activity -- the previous activity always remains 126 * below it in the stack, and will not come to the foreground again until 127 * the new activity exits.</p> 128 * 129 * <p>An activity has essentially four states:</p> 130 * <ul> 131 * <li> If an activity in the foreground of the screen (at the top of 132 * the stack), 133 * it is <em>active</em> or <em>running</em>. </li> 134 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 135 * or transparent activity has focus on top of your activity), it 136 * is <em>paused</em>. A paused activity is completely alive (it 137 * maintains all state and member information and remains attached to 138 * the window manager), but can be killed by the system in extreme 139 * low memory situations. 140 * <li>If an activity is completely obscured by another activity, 141 * it is <em>stopped</em>. It still retains all state and member information, 142 * however, it is no longer visible to the user so its window is hidden 143 * and it will often be killed by the system when memory is needed 144 * elsewhere.</li> 145 * <li>If an activity is paused or stopped, the system can drop the activity 146 * from memory by either asking it to finish, or simply killing its 147 * process. When it is displayed again to the user, it must be 148 * completely restarted and restored to its previous state.</li> 149 * </ul> 150 * 151 * <p>The following diagram shows the important state paths of an Activity. 152 * The square rectangles represent callback methods you can implement to 153 * perform operations when the Activity moves between states. The colored 154 * ovals are major states the Activity can be in.</p> 155 * 156 * <p><img src="../../../images/activity_lifecycle.png" 157 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 158 * 159 * <p>There are three key loops you may be interested in monitoring within your 160 * activity: 161 * 162 * <ul> 163 * <li>The <b>entire lifetime</b> of an activity happens between the first call 164 * to {@link android.app.Activity#onCreate} through to a single final call 165 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 166 * of "global" state in onCreate(), and release all remaining resources in 167 * onDestroy(). For example, if it has a thread running in the background 168 * to download data from the network, it may create that thread in onCreate() 169 * and then stop the thread in onDestroy(). 170 * 171 * <li>The <b>visible lifetime</b> of an activity happens between a call to 172 * {@link android.app.Activity#onStart} until a corresponding call to 173 * {@link android.app.Activity#onStop}. During this time the user can see the 174 * activity on-screen, though it may not be in the foreground and interacting 175 * with the user. Between these two methods you can maintain resources that 176 * are needed to show the activity to the user. For example, you can register 177 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 178 * that impact your UI, and unregister it in onStop() when the user an no 179 * longer see what you are displaying. The onStart() and onStop() methods 180 * can be called multiple times, as the activity becomes visible and hidden 181 * to the user. 182 * 183 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 184 * {@link android.app.Activity#onResume} until a corresponding call to 185 * {@link android.app.Activity#onPause}. During this time the activity is 186 * in front of all other activities and interacting with the user. An activity 187 * can frequently go between the resumed and paused states -- for example when 188 * the device goes to sleep, when an activity result is delivered, when a new 189 * intent is delivered -- so the code in these methods should be fairly 190 * lightweight. 191 * </ul> 192 * 193 * <p>The entire lifecycle of an activity is defined by the following 194 * Activity methods. All of these are hooks that you can override 195 * to do appropriate work when the activity changes state. All 196 * activities will implement {@link android.app.Activity#onCreate} 197 * to do their initial setup; many will also implement 198 * {@link android.app.Activity#onPause} to commit changes to data and 199 * otherwise prepare to stop interacting with the user. You should always 200 * call up to your superclass when implementing these methods.</p> 201 * 202 * </p> 203 * <pre class="prettyprint"> 204 * public class Activity extends ApplicationContext { 205 * protected void onCreate(Bundle savedInstanceState); 206 * 207 * protected void onStart(); 208 * 209 * protected void onRestart(); 210 * 211 * protected void onResume(); 212 * 213 * protected void onPause(); 214 * 215 * protected void onStop(); 216 * 217 * protected void onDestroy(); 218 * } 219 * </pre> 220 * 221 * <p>In general the movement through an activity's lifecycle looks like 222 * this:</p> 223 * 224 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 225 * <colgroup align="left" span="3" /> 226 * <colgroup align="left" /> 227 * <colgroup align="center" /> 228 * <colgroup align="center" /> 229 * 230 * <thead> 231 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 232 * </thead> 233 * 234 * <tbody> 235 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 236 * <td>Called when the activity is first created. 237 * This is where you should do all of your normal static set up: 238 * create views, bind data to lists, etc. This method also 239 * provides you with a Bundle containing the activity's previously 240 * frozen state, if there was one. 241 * <p>Always followed by <code>onStart()</code>.</td> 242 * <td align="center">No</td> 243 * <td align="center"><code>onStart()</code></td> 244 * </tr> 245 * 246 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 247 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 248 * <td>Called after your activity has been stopped, prior to it being 249 * started again. 250 * <p>Always followed by <code>onStart()</code></td> 251 * <td align="center">No</td> 252 * <td align="center"><code>onStart()</code></td> 253 * </tr> 254 * 255 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 256 * <td>Called when the activity is becoming visible to the user. 257 * <p>Followed by <code>onResume()</code> if the activity comes 258 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 259 * <td align="center">No</td> 260 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 261 * </tr> 262 * 263 * <tr><td rowspan="2" style="border-left: none;"> </td> 264 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 265 * <td>Called when the activity will start 266 * interacting with the user. At this point your activity is at 267 * the top of the activity stack, with user input going to it. 268 * <p>Always followed by <code>onPause()</code>.</td> 269 * <td align="center">No</td> 270 * <td align="center"><code>onPause()</code></td> 271 * </tr> 272 * 273 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 274 * <td>Called when the system is about to start resuming a previous 275 * activity. This is typically used to commit unsaved changes to 276 * persistent data, stop animations and other things that may be consuming 277 * CPU, etc. Implementations of this method must be very quick because 278 * the next activity will not be resumed until this method returns. 279 * <p>Followed by either <code>onResume()</code> if the activity 280 * returns back to the front, or <code>onStop()</code> if it becomes 281 * invisible to the user.</td> 282 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 283 * <td align="center"><code>onResume()</code> or<br> 284 * <code>onStop()</code></td> 285 * </tr> 286 * 287 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 288 * <td>Called when the activity is no longer visible to the user, because 289 * another activity has been resumed and is covering this one. This 290 * may happen either because a new activity is being started, an existing 291 * one is being brought in front of this one, or this one is being 292 * destroyed. 293 * <p>Followed by either <code>onRestart()</code> if 294 * this activity is coming back to interact with the user, or 295 * <code>onDestroy()</code> if this activity is going away.</td> 296 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 297 * <td align="center"><code>onRestart()</code> or<br> 298 * <code>onDestroy()</code></td> 299 * </tr> 300 * 301 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 302 * <td>The final call you receive before your 303 * activity is destroyed. This can happen either because the 304 * activity is finishing (someone called {@link Activity#finish} on 305 * it, or because the system is temporarily destroying this 306 * instance of the activity to save space. You can distinguish 307 * between these two scenarios with the {@link 308 * Activity#isFinishing} method.</td> 309 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 310 * <td align="center"><em>nothing</em></td> 311 * </tr> 312 * </tbody> 313 * </table> 314 * 315 * <p>Note the "Killable" column in the above table -- for those methods that 316 * are marked as being killable, after that method returns the process hosting the 317 * activity may killed by the system <em>at any time</em> without another line 318 * of its code being executed. Because of this, you should use the 319 * {@link #onPause} method to write any persistent data (such as user edits) 320 * to storage. In addition, the method 321 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 322 * in such a background state, allowing you to save away any dynamic instance 323 * state in your activity into the given Bundle, to be later received in 324 * {@link #onCreate} if the activity needs to be re-created. 325 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 326 * section for more information on how the lifecycle of a process is tied 327 * to the activities it is hosting. Note that it is important to save 328 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 329 * because the later is not part of the lifecycle callbacks, so will not 330 * be called in every situation as described in its documentation.</p> 331 * 332 * <p>For those methods that are not marked as being killable, the activity's 333 * process will not be killed by the system starting from the time the method 334 * is called and continuing after it returns. Thus an activity is in the killable 335 * state, for example, between after <code>onPause()</code> to the start of 336 * <code>onResume()</code>.</p> 337 * 338 * <a name="ConfigurationChanges"></a> 339 * <h3>Configuration Changes</h3> 340 * 341 * <p>If the configuration of the device (as defined by the 342 * {@link Configuration Resources.Configuration} class) changes, 343 * then anything displaying a user interface will need to update to match that 344 * configuration. Because Activity is the primary mechanism for interacting 345 * with the user, it includes special support for handling configuration 346 * changes.</p> 347 * 348 * <p>Unless you specify otherwise, a configuration change (such as a change 349 * in screen orientation, language, input devices, etc) will cause your 350 * current activity to be <em>destroyed</em>, going through the normal activity 351 * lifecycle process of {@link #onPause}, 352 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 353 * had been in the foreground or visible to the user, once {@link #onDestroy} is 354 * called in that instance then a new instance of the activity will be 355 * created, with whatever savedInstanceState the previous instance had generated 356 * from {@link #onSaveInstanceState}.</p> 357 * 358 * <p>This is done because any application resource, 359 * including layout files, can change based on any configuration value. Thus 360 * the only safe way to handle a configuration change is to re-retrieve all 361 * resources, including layouts, drawables, and strings. Because activities 362 * must already know how to save their state and re-create themselves from 363 * that state, this is a convenient way to have an activity restart itself 364 * with a new configuration.</p> 365 * 366 * <p>In some special cases, you may want to bypass restarting of your 367 * activity based on one or more types of configuration changes. This is 368 * done with the {@link android.R.attr#configChanges android:configChanges} 369 * attribute in its manifest. For any types of configuration changes you say 370 * that you handle there, you will receive a call to your current activity's 371 * {@link #onConfigurationChanged} method instead of being restarted. If 372 * a configuration change involves any that you do not handle, however, the 373 * activity will still be restarted and {@link #onConfigurationChanged} 374 * will not be called.</p> 375 * 376 * <a name="StartingActivities"></a> 377 * <h3>Starting Activities and Getting Results</h3> 378 * 379 * <p>The {@link android.app.Activity#startActivity} 380 * method is used to start a 381 * new activity, which will be placed at the top of the activity stack. It 382 * takes a single argument, an {@link android.content.Intent Intent}, 383 * which describes the activity 384 * to be executed.</p> 385 * 386 * <p>Sometimes you want to get a result back from an activity when it 387 * ends. For example, you may start an activity that lets the user pick 388 * a person in a list of contacts; when it ends, it returns the person 389 * that was selected. To do this, you call the 390 * {@link android.app.Activity#startActivityForResult(Intent, int)} 391 * version with a second integer parameter identifying the call. The result 392 * will come back through your {@link android.app.Activity#onActivityResult} 393 * method.</p> 394 * 395 * <p>When an activity exits, it can call 396 * {@link android.app.Activity#setResult(int)} 397 * to return data back to its parent. It must always supply a result code, 398 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 399 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 400 * return back an Intent containing any additional data it wants. All of this 401 * information appears back on the 402 * parent's <code>Activity.onActivityResult()</code>, along with the integer 403 * identifier it originally supplied.</p> 404 * 405 * <p>If a child activity fails for any reason (such as crashing), the parent 406 * activity will receive a result with the code RESULT_CANCELED.</p> 407 * 408 * <pre class="prettyprint"> 409 * public class MyActivity extends Activity { 410 * ... 411 * 412 * static final int PICK_CONTACT_REQUEST = 0; 413 * 414 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 415 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 416 * // When the user center presses, let them pick a contact. 417 * startActivityForResult( 418 * new Intent(Intent.ACTION_PICK, 419 * new Uri("content://contacts")), 420 * PICK_CONTACT_REQUEST); 421 * return true; 422 * } 423 * return false; 424 * } 425 * 426 * protected void onActivityResult(int requestCode, int resultCode, 427 * Intent data) { 428 * if (requestCode == PICK_CONTACT_REQUEST) { 429 * if (resultCode == RESULT_OK) { 430 * // A contact was picked. Here we will just display it 431 * // to the user. 432 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 433 * } 434 * } 435 * } 436 * } 437 * </pre> 438 * 439 * <a name="SavingPersistentState"></a> 440 * <h3>Saving Persistent State</h3> 441 * 442 * <p>There are generally two kinds of persistent state than an activity 443 * will deal with: shared document-like data (typically stored in a SQLite 444 * database using a {@linkplain android.content.ContentProvider content provider}) 445 * and internal state such as user preferences.</p> 446 * 447 * <p>For content provider data, we suggest that activities use a 448 * "edit in place" user model. That is, any edits a user makes are effectively 449 * made immediately without requiring an additional confirmation step. 450 * Supporting this model is generally a simple matter of following two rules:</p> 451 * 452 * <ul> 453 * <li> <p>When creating a new document, the backing database entry or file for 454 * it is created immediately. For example, if the user chooses to write 455 * a new e-mail, a new entry for that e-mail is created as soon as they 456 * start entering data, so that if they go to any other activity after 457 * that point this e-mail will now appear in the list of drafts.</p> 458 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 459 * commit to the backing content provider or file any changes the user 460 * has made. This ensures that those changes will be seen by any other 461 * activity that is about to run. You will probably want to commit 462 * your data even more aggressively at key times during your 463 * activity's lifecycle: for example before starting a new 464 * activity, before finishing your own activity, when the user 465 * switches between input fields, etc.</p> 466 * </ul> 467 * 468 * <p>This model is designed to prevent data loss when a user is navigating 469 * between activities, and allows the system to safely kill an activity (because 470 * system resources are needed somewhere else) at any time after it has been 471 * paused. Note this implies 472 * that the user pressing BACK from your activity does <em>not</em> 473 * mean "cancel" -- it means to leave the activity with its current contents 474 * saved away. Cancelling edits in an activity must be provided through 475 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 476 * 477 * <p>See the {@linkplain android.content.ContentProvider content package} for 478 * more information about content providers. These are a key aspect of how 479 * different activities invoke and propagate data between themselves.</p> 480 * 481 * <p>The Activity class also provides an API for managing internal persistent state 482 * associated with an activity. This can be used, for example, to remember 483 * the user's preferred initial display in a calendar (day view or week view) 484 * or the user's default home page in a web browser.</p> 485 * 486 * <p>Activity persistent state is managed 487 * with the method {@link #getPreferences}, 488 * allowing you to retrieve and 489 * modify a set of name/value pairs associated with the activity. To use 490 * preferences that are shared across multiple application components 491 * (activities, receivers, services, providers), you can use the underlying 492 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 493 * to retrieve a preferences 494 * object stored under a specific name. 495 * (Note that it is not possible to share settings data across application 496 * packages -- for that you will need a content provider.)</p> 497 * 498 * <p>Here is an excerpt from a calendar activity that stores the user's 499 * preferred view mode in its persistent settings:</p> 500 * 501 * <pre class="prettyprint"> 502 * public class CalendarActivity extends Activity { 503 * ... 504 * 505 * static final int DAY_VIEW_MODE = 0; 506 * static final int WEEK_VIEW_MODE = 1; 507 * 508 * private SharedPreferences mPrefs; 509 * private int mCurViewMode; 510 * 511 * protected void onCreate(Bundle savedInstanceState) { 512 * super.onCreate(savedInstanceState); 513 * 514 * SharedPreferences mPrefs = getSharedPreferences(); 515 * mCurViewMode = mPrefs.getInt("view_mode" DAY_VIEW_MODE); 516 * } 517 * 518 * protected void onPause() { 519 * super.onPause(); 520 * 521 * SharedPreferences.Editor ed = mPrefs.edit(); 522 * ed.putInt("view_mode", mCurViewMode); 523 * ed.commit(); 524 * } 525 * } 526 * </pre> 527 * 528 * <a name="Permissions"></a> 529 * <h3>Permissions</h3> 530 * 531 * <p>The ability to start a particular Activity can be enforced when it is 532 * declared in its 533 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 534 * tag. By doing so, other applications will need to declare a corresponding 535 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 536 * element in their own manifest to be able to start that activity. 537 * 538 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 539 * document for more information on permissions and security in general. 540 * 541 * <a name="ProcessLifecycle"></a> 542 * <h3>Process Lifecycle</h3> 543 * 544 * <p>The Android system attempts to keep application process around for as 545 * long as possible, but eventually will need to remove old processes when 546 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 547 * Lifecycle</a>, the decision about which process to remove is intimately 548 * tied to the state of the user's interaction with it. In general, there 549 * are four states a process can be in based on the activities running in it, 550 * listed here in order of importance. The system will kill less important 551 * processes (the last ones) before it resorts to killing more important 552 * processes (the first ones). 553 * 554 * <ol> 555 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 556 * that the user is currently interacting with) is considered the most important. 557 * Its process will only be killed as a last resort, if it uses more memory 558 * than is available on the device. Generally at this point the device has 559 * reached a memory paging state, so this is required in order to keep the user 560 * interface responsive. 561 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 562 * but not in the foreground, such as one sitting behind a foreground dialog) 563 * is considered extremely important and will not be killed unless that is 564 * required to keep the foreground activity running. 565 * <li> <p>A <b>background activity</b> (an activity that is not visible to 566 * the user and has been paused) is no longer critical, so the system may 567 * safely kill its process to reclaim memory for other foreground or 568 * visible processes. If its process needs to be killed, when the user navigates 569 * back to the activity (making it visible on the screen again), its 570 * {@link #onCreate} method will be called with the savedInstanceState it had previously 571 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 572 * state as the user last left it. 573 * <li> <p>An <b>empty process</b> is one hosting no activities or other 574 * application components (such as {@link Service} or 575 * {@link android.content.BroadcastReceiver} classes). These are killed very 576 * quickly by the system as memory becomes low. For this reason, any 577 * background operation you do outside of an activity must be executed in the 578 * context of an activity BroadcastReceiver or Service to ensure that the system 579 * knows it needs to keep your process around. 580 * </ol> 581 * 582 * <p>Sometimes an Activity may need to do a long-running operation that exists 583 * independently of the activity lifecycle itself. An example may be a camera 584 * application that allows you to upload a picture to a web site. The upload 585 * may take a long time, and the application should allow the user to leave 586 * the application will it is executing. To accomplish this, your Activity 587 * should start a {@link Service} in which the upload takes place. This allows 588 * the system to properly prioritize your process (considering it to be more 589 * important than other non-visible applications) for the duration of the 590 * upload, independent of whether the original activity is paused, stopped, 591 * or finished. 592 */ 593public class Activity extends ContextThemeWrapper 594 implements LayoutInflater.Factory, 595 Window.Callback, KeyEvent.Callback, 596 OnCreateContextMenuListener, ComponentCallbacks { 597 private static final String TAG = "Activity"; 598 599 /** Standard activity result: operation canceled. */ 600 public static final int RESULT_CANCELED = 0; 601 /** Standard activity result: operation succeeded. */ 602 public static final int RESULT_OK = -1; 603 /** Start of user-defined activity results. */ 604 public static final int RESULT_FIRST_USER = 1; 605 606 private static long sInstanceCount = 0; 607 608 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 609 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 610 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 611 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 612 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 613 614 private static class ManagedDialog { 615 Dialog mDialog; 616 Bundle mArgs; 617 } 618 private SparseArray<ManagedDialog> mManagedDialogs; 619 620 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 621 private Instrumentation mInstrumentation; 622 private IBinder mToken; 623 private int mIdent; 624 /*package*/ String mEmbeddedID; 625 private Application mApplication; 626 /*package*/ Intent mIntent; 627 private ComponentName mComponent; 628 /*package*/ ActivityInfo mActivityInfo; 629 /*package*/ ActivityThread mMainThread; 630 /*package*/ Object mLastNonConfigurationInstance; 631 /*package*/ HashMap<String,Object> mLastNonConfigurationChildInstances; 632 Activity mParent; 633 boolean mCalled; 634 private boolean mResumed; 635 private boolean mStopped; 636 boolean mFinished; 637 boolean mStartedActivity; 638 /*package*/ int mConfigChangeFlags; 639 /*package*/ Configuration mCurrentConfig; 640 private SearchManager mSearchManager; 641 642 private Window mWindow; 643 644 private WindowManager mWindowManager; 645 /*package*/ View mDecor = null; 646 /*package*/ boolean mWindowAdded = false; 647 /*package*/ boolean mVisibleFromServer = false; 648 /*package*/ boolean mVisibleFromClient = true; 649 650 private CharSequence mTitle; 651 private int mTitleColor = 0; 652 653 final FragmentManager mFragments = new FragmentManager(); 654 655 private final class FragmentTransactionImpl implements FragmentTransaction { 656 ArrayList<Fragment> mAdded; 657 ArrayList<Fragment> mRemoved; 658 659 public FragmentTransaction add(Fragment fragment, int containerViewId) { 660 return add(fragment, null, containerViewId); 661 } 662 663 public FragmentTransaction add(Fragment fragment, String name, int containerViewId) { 664 if (fragment.mActivity != null) { 665 throw new IllegalStateException("Fragment already added: " + fragment); 666 } 667 if (name != null) { 668 fragment.mName = name; 669 } 670 if (mRemoved != null) { 671 mRemoved.remove(fragment); 672 } 673 if (mAdded == null) { 674 mAdded = new ArrayList<Fragment>(); 675 } 676 fragment.mContainerId = containerViewId; 677 mAdded.add(fragment); 678 return this; 679 } 680 681 public FragmentTransaction remove(Fragment fragment) { 682 if (fragment.mActivity == null) { 683 throw new IllegalStateException("Fragment not added: " + fragment); 684 } 685 if (mAdded != null) { 686 mAdded.remove(fragment); 687 } 688 if (mRemoved == null) { 689 mRemoved = new ArrayList<Fragment>(); 690 } 691 mRemoved.add(fragment); 692 return this; 693 } 694 695 public void commit() { 696 if (mRemoved != null) { 697 for (int i=mRemoved.size()-1; i>=0; i--) { 698 mFragments.removeFragment(mRemoved.get(i)); 699 } 700 } 701 if (mAdded != null) { 702 for (int i=mAdded.size()-1; i>=0; i--) { 703 mFragments.addFragment(mAdded.get(i)); 704 } 705 } 706 if (mFragments != null) { 707 mFragments.moveToState(mFragments.mCurState); 708 } 709 } 710 } 711 712 private static final class ManagedCursor { 713 ManagedCursor(Cursor cursor) { 714 mCursor = cursor; 715 mReleased = false; 716 mUpdated = false; 717 } 718 719 private final Cursor mCursor; 720 private boolean mReleased; 721 private boolean mUpdated; 722 } 723 private final ArrayList<ManagedCursor> mManagedCursors = 724 new ArrayList<ManagedCursor>(); 725 726 // protected by synchronized (this) 727 int mResultCode = RESULT_CANCELED; 728 Intent mResultData = null; 729 730 private boolean mTitleReady = false; 731 732 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 733 private SpannableStringBuilder mDefaultKeySsb = null; 734 735 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 736 737 private Thread mUiThread; 738 private final Handler mHandler = new Handler(); 739 740 // Used for debug only 741 /* 742 public Activity() { 743 ++sInstanceCount; 744 } 745 746 @Override 747 protected void finalize() throws Throwable { 748 super.finalize(); 749 --sInstanceCount; 750 } 751 */ 752 753 public static long getInstanceCount() { 754 return sInstanceCount; 755 } 756 757 /** Return the intent that started this activity. */ 758 public Intent getIntent() { 759 return mIntent; 760 } 761 762 /** 763 * Change the intent returned by {@link #getIntent}. This holds a 764 * reference to the given intent; it does not copy it. Often used in 765 * conjunction with {@link #onNewIntent}. 766 * 767 * @param newIntent The new Intent object to return from getIntent 768 * 769 * @see #getIntent 770 * @see #onNewIntent 771 */ 772 public void setIntent(Intent newIntent) { 773 mIntent = newIntent; 774 } 775 776 /** Return the application that owns this activity. */ 777 public final Application getApplication() { 778 return mApplication; 779 } 780 781 /** Is this activity embedded inside of another activity? */ 782 public final boolean isChild() { 783 return mParent != null; 784 } 785 786 /** Return the parent activity if this view is an embedded child. */ 787 public final Activity getParent() { 788 return mParent; 789 } 790 791 /** Retrieve the window manager for showing custom windows. */ 792 public WindowManager getWindowManager() { 793 return mWindowManager; 794 } 795 796 /** 797 * Retrieve the current {@link android.view.Window} for the activity. 798 * This can be used to directly access parts of the Window API that 799 * are not available through Activity/Screen. 800 * 801 * @return Window The current window, or null if the activity is not 802 * visual. 803 */ 804 public Window getWindow() { 805 return mWindow; 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 @Override 822 public int getWallpaperDesiredMinimumWidth() { 823 int width = super.getWallpaperDesiredMinimumWidth(); 824 return width <= 0 ? getWindowManager().getDefaultDisplay().getWidth() : width; 825 } 826 827 @Override 828 public int getWallpaperDesiredMinimumHeight() { 829 int height = super.getWallpaperDesiredMinimumHeight(); 830 return height <= 0 ? getWindowManager().getDefaultDisplay().getHeight() : height; 831 } 832 833 /** 834 * Called when the activity is starting. This is where most initialization 835 * should go: calling {@link #setContentView(int)} to inflate the 836 * activity's UI, using {@link #findViewById} to programmatically interact 837 * with widgets in the UI, calling 838 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 839 * cursors for data being displayed, etc. 840 * 841 * <p>You can call {@link #finish} from within this function, in 842 * which case onDestroy() will be immediately called without any of the rest 843 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 844 * {@link #onPause}, etc) executing. 845 * 846 * <p><em>Derived classes must call through to the super class's 847 * implementation of this method. If they do not, an exception will be 848 * thrown.</em></p> 849 * 850 * @param savedInstanceState If the activity is being re-initialized after 851 * previously being shut down then this Bundle contains the data it most 852 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 853 * 854 * @see #onStart 855 * @see #onSaveInstanceState 856 * @see #onRestoreInstanceState 857 * @see #onPostCreate 858 */ 859 protected void onCreate(Bundle savedInstanceState) { 860 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 861 com.android.internal.R.styleable.Window_windowNoDisplay, false); 862 mCalled = true; 863 } 864 865 /** 866 * The hook for {@link ActivityThread} to restore the state of this activity. 867 * 868 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 869 * {@link #restoreManagedDialogs(android.os.Bundle)}. 870 * 871 * @param savedInstanceState contains the saved state 872 */ 873 final void performRestoreInstanceState(Bundle savedInstanceState) { 874 onRestoreInstanceState(savedInstanceState); 875 restoreManagedDialogs(savedInstanceState); 876 } 877 878 /** 879 * This method is called after {@link #onStart} when the activity is 880 * being re-initialized from a previously saved state, given here in 881 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 882 * to restore their state, but it is sometimes convenient to do it here 883 * after all of the initialization has been done or to allow subclasses to 884 * decide whether to use your default implementation. The default 885 * implementation of this method performs a restore of any view state that 886 * had previously been frozen by {@link #onSaveInstanceState}. 887 * 888 * <p>This method is called between {@link #onStart} and 889 * {@link #onPostCreate}. 890 * 891 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 892 * 893 * @see #onCreate 894 * @see #onPostCreate 895 * @see #onResume 896 * @see #onSaveInstanceState 897 */ 898 protected void onRestoreInstanceState(Bundle savedInstanceState) { 899 if (mWindow != null) { 900 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 901 if (windowState != null) { 902 mWindow.restoreHierarchyState(windowState); 903 } 904 } 905 } 906 907 /** 908 * Restore the state of any saved managed dialogs. 909 * 910 * @param savedInstanceState The bundle to restore from. 911 */ 912 private void restoreManagedDialogs(Bundle savedInstanceState) { 913 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 914 if (b == null) { 915 return; 916 } 917 918 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 919 final int numDialogs = ids.length; 920 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 921 for (int i = 0; i < numDialogs; i++) { 922 final Integer dialogId = ids[i]; 923 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 924 if (dialogState != null) { 925 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 926 // so tell createDialog() not to do it, otherwise we get an exception 927 final ManagedDialog md = new ManagedDialog(); 928 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 929 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 930 if (md.mDialog != null) { 931 mManagedDialogs.put(dialogId, md); 932 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 933 md.mDialog.onRestoreInstanceState(dialogState); 934 } 935 } 936 } 937 } 938 939 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 940 final Dialog dialog = onCreateDialog(dialogId, args); 941 if (dialog == null) { 942 return null; 943 } 944 dialog.dispatchOnCreate(state); 945 return dialog; 946 } 947 948 private static String savedDialogKeyFor(int key) { 949 return SAVED_DIALOG_KEY_PREFIX + key; 950 } 951 952 private static String savedDialogArgsKeyFor(int key) { 953 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 954 } 955 956 /** 957 * Called when activity start-up is complete (after {@link #onStart} 958 * and {@link #onRestoreInstanceState} have been called). Applications will 959 * generally not implement this method; it is intended for system 960 * classes to do final initialization after application code has run. 961 * 962 * <p><em>Derived classes must call through to the super class's 963 * implementation of this method. If they do not, an exception will be 964 * thrown.</em></p> 965 * 966 * @param savedInstanceState If the activity is being re-initialized after 967 * previously being shut down then this Bundle contains the data it most 968 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 969 * @see #onCreate 970 */ 971 protected void onPostCreate(Bundle savedInstanceState) { 972 if (!isChild()) { 973 mTitleReady = true; 974 onTitleChanged(getTitle(), getTitleColor()); 975 } 976 mCalled = true; 977 } 978 979 /** 980 * Called after {@link #onCreate} — or after {@link #onRestart} when 981 * the activity had been stopped, but is now again being displayed to the 982 * user. It will be followed by {@link #onResume}. 983 * 984 * <p><em>Derived classes must call through to the super class's 985 * implementation of this method. If they do not, an exception will be 986 * thrown.</em></p> 987 * 988 * @see #onCreate 989 * @see #onStop 990 * @see #onResume 991 */ 992 protected void onStart() { 993 mCalled = true; 994 } 995 996 /** 997 * Called after {@link #onStop} when the current activity is being 998 * re-displayed to the user (the user has navigated back to it). It will 999 * be followed by {@link #onStart} and then {@link #onResume}. 1000 * 1001 * <p>For activities that are using raw {@link Cursor} objects (instead of 1002 * creating them through 1003 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1004 * this is usually the place 1005 * where the cursor should be requeried (because you had deactivated it in 1006 * {@link #onStop}. 1007 * 1008 * <p><em>Derived classes must call through to the super class's 1009 * implementation of this method. If they do not, an exception will be 1010 * thrown.</em></p> 1011 * 1012 * @see #onStop 1013 * @see #onStart 1014 * @see #onResume 1015 */ 1016 protected void onRestart() { 1017 mCalled = true; 1018 } 1019 1020 /** 1021 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1022 * {@link #onPause}, for your activity to start interacting with the user. 1023 * This is a good place to begin animations, open exclusive-access devices 1024 * (such as the camera), etc. 1025 * 1026 * <p>Keep in mind that onResume is not the best indicator that your activity 1027 * is visible to the user; a system window such as the keyguard may be in 1028 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1029 * activity is visible to the user (for example, to resume a game). 1030 * 1031 * <p><em>Derived classes must call through to the super class's 1032 * implementation of this method. If they do not, an exception will be 1033 * thrown.</em></p> 1034 * 1035 * @see #onRestoreInstanceState 1036 * @see #onRestart 1037 * @see #onPostResume 1038 * @see #onPause 1039 */ 1040 protected void onResume() { 1041 mCalled = true; 1042 } 1043 1044 /** 1045 * Called when activity resume is complete (after {@link #onResume} has 1046 * been called). Applications will generally not implement this method; 1047 * it is intended for system classes to do final setup after application 1048 * resume code has run. 1049 * 1050 * <p><em>Derived classes must call through to the super class's 1051 * implementation of this method. If they do not, an exception will be 1052 * thrown.</em></p> 1053 * 1054 * @see #onResume 1055 */ 1056 protected void onPostResume() { 1057 final Window win = getWindow(); 1058 if (win != null) win.makeActive(); 1059 mCalled = true; 1060 } 1061 1062 /** 1063 * This is called for activities that set launchMode to "singleTop" in 1064 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1065 * flag when calling {@link #startActivity}. In either case, when the 1066 * activity is re-launched while at the top of the activity stack instead 1067 * of a new instance of the activity being started, onNewIntent() will be 1068 * called on the existing instance with the Intent that was used to 1069 * re-launch it. 1070 * 1071 * <p>An activity will always be paused before receiving a new intent, so 1072 * you can count on {@link #onResume} being called after this method. 1073 * 1074 * <p>Note that {@link #getIntent} still returns the original Intent. You 1075 * can use {@link #setIntent} to update it to this new Intent. 1076 * 1077 * @param intent The new intent that was started for the activity. 1078 * 1079 * @see #getIntent 1080 * @see #setIntent 1081 * @see #onResume 1082 */ 1083 protected void onNewIntent(Intent intent) { 1084 } 1085 1086 /** 1087 * The hook for {@link ActivityThread} to save the state of this activity. 1088 * 1089 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1090 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1091 * 1092 * @param outState The bundle to save the state to. 1093 */ 1094 final void performSaveInstanceState(Bundle outState) { 1095 onSaveInstanceState(outState); 1096 saveManagedDialogs(outState); 1097 } 1098 1099 /** 1100 * Called to retrieve per-instance state from an activity before being killed 1101 * so that the state can be restored in {@link #onCreate} or 1102 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1103 * will be passed to both). 1104 * 1105 * <p>This method is called before an activity may be killed so that when it 1106 * comes back some time in the future it can restore its state. For example, 1107 * if activity B is launched in front of activity A, and at some point activity 1108 * A is killed to reclaim resources, activity A will have a chance to save the 1109 * current state of its user interface via this method so that when the user 1110 * returns to activity A, the state of the user interface can be restored 1111 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1112 * 1113 * <p>Do not confuse this method with activity lifecycle callbacks such as 1114 * {@link #onPause}, which is always called when an activity is being placed 1115 * in the background or on its way to destruction, or {@link #onStop} which 1116 * is called before destruction. One example of when {@link #onPause} and 1117 * {@link #onStop} is called and not this method is when a user navigates back 1118 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1119 * on B because that particular instance will never be restored, so the 1120 * system avoids calling it. An example when {@link #onPause} is called and 1121 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1122 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1123 * killed during the lifetime of B since the state of the user interface of 1124 * A will stay intact. 1125 * 1126 * <p>The default implementation takes care of most of the UI per-instance 1127 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1128 * view in the hierarchy that has an id, and by saving the id of the currently 1129 * focused view (all of which is restored by the default implementation of 1130 * {@link #onRestoreInstanceState}). If you override this method to save additional 1131 * information not captured by each individual view, you will likely want to 1132 * call through to the default implementation, otherwise be prepared to save 1133 * all of the state of each view yourself. 1134 * 1135 * <p>If called, this method will occur before {@link #onStop}. There are 1136 * no guarantees about whether it will occur before or after {@link #onPause}. 1137 * 1138 * @param outState Bundle in which to place your saved state. 1139 * 1140 * @see #onCreate 1141 * @see #onRestoreInstanceState 1142 * @see #onPause 1143 */ 1144 protected void onSaveInstanceState(Bundle outState) { 1145 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1146 } 1147 1148 /** 1149 * Save the state of any managed dialogs. 1150 * 1151 * @param outState place to store the saved state. 1152 */ 1153 private void saveManagedDialogs(Bundle outState) { 1154 if (mManagedDialogs == null) { 1155 return; 1156 } 1157 1158 final int numDialogs = mManagedDialogs.size(); 1159 if (numDialogs == 0) { 1160 return; 1161 } 1162 1163 Bundle dialogState = new Bundle(); 1164 1165 int[] ids = new int[mManagedDialogs.size()]; 1166 1167 // save each dialog's bundle, gather the ids 1168 for (int i = 0; i < numDialogs; i++) { 1169 final int key = mManagedDialogs.keyAt(i); 1170 ids[i] = key; 1171 final ManagedDialog md = mManagedDialogs.valueAt(i); 1172 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1173 if (md.mArgs != null) { 1174 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1175 } 1176 } 1177 1178 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1179 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1180 } 1181 1182 1183 /** 1184 * Called as part of the activity lifecycle when an activity is going into 1185 * the background, but has not (yet) been killed. The counterpart to 1186 * {@link #onResume}. 1187 * 1188 * <p>When activity B is launched in front of activity A, this callback will 1189 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1190 * so be sure to not do anything lengthy here. 1191 * 1192 * <p>This callback is mostly used for saving any persistent state the 1193 * activity is editing, to present a "edit in place" model to the user and 1194 * making sure nothing is lost if there are not enough resources to start 1195 * the new activity without first killing this one. This is also a good 1196 * place to do things like stop animations and other things that consume a 1197 * noticeable mount of CPU in order to make the switch to the next activity 1198 * as fast as possible, or to close resources that are exclusive access 1199 * such as the camera. 1200 * 1201 * <p>In situations where the system needs more memory it may kill paused 1202 * processes to reclaim resources. Because of this, you should be sure 1203 * that all of your state is saved by the time you return from 1204 * this function. In general {@link #onSaveInstanceState} is used to save 1205 * per-instance state in the activity and this method is used to store 1206 * global persistent data (in content providers, files, etc.) 1207 * 1208 * <p>After receiving this call you will usually receive a following call 1209 * to {@link #onStop} (after the next activity has been resumed and 1210 * displayed), however in some cases there will be a direct call back to 1211 * {@link #onResume} without going through the stopped state. 1212 * 1213 * <p><em>Derived classes must call through to the super class's 1214 * implementation of this method. If they do not, an exception will be 1215 * thrown.</em></p> 1216 * 1217 * @see #onResume 1218 * @see #onSaveInstanceState 1219 * @see #onStop 1220 */ 1221 protected void onPause() { 1222 mCalled = true; 1223 } 1224 1225 /** 1226 * Called as part of the activity lifecycle when an activity is about to go 1227 * into the background as the result of user choice. For example, when the 1228 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1229 * when an incoming phone call causes the in-call Activity to be automatically 1230 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1231 * the activity being interrupted. In cases when it is invoked, this method 1232 * is called right before the activity's {@link #onPause} callback. 1233 * 1234 * <p>This callback and {@link #onUserInteraction} are intended to help 1235 * activities manage status bar notifications intelligently; specifically, 1236 * for helping activities determine the proper time to cancel a notfication. 1237 * 1238 * @see #onUserInteraction() 1239 */ 1240 protected void onUserLeaveHint() { 1241 } 1242 1243 /** 1244 * Generate a new thumbnail for this activity. This method is called before 1245 * pausing the activity, and should draw into <var>outBitmap</var> the 1246 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1247 * can use the given <var>canvas</var>, which is configured to draw into the 1248 * bitmap, for rendering if desired. 1249 * 1250 * <p>The default implementation renders the Screen's current view 1251 * hierarchy into the canvas to generate a thumbnail. 1252 * 1253 * <p>If you return false, the bitmap will be filled with a default 1254 * thumbnail. 1255 * 1256 * @param outBitmap The bitmap to contain the thumbnail. 1257 * @param canvas Can be used to render into the bitmap. 1258 * 1259 * @return Return true if you have drawn into the bitmap; otherwise after 1260 * you return it will be filled with a default thumbnail. 1261 * 1262 * @see #onCreateDescription 1263 * @see #onSaveInstanceState 1264 * @see #onPause 1265 */ 1266 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1267 final View view = mDecor; 1268 if (view == null) { 1269 return false; 1270 } 1271 1272 final int vw = view.getWidth(); 1273 final int vh = view.getHeight(); 1274 final int dw = outBitmap.getWidth(); 1275 final int dh = outBitmap.getHeight(); 1276 1277 canvas.save(); 1278 canvas.scale(((float)dw)/vw, ((float)dh)/vh); 1279 view.draw(canvas); 1280 canvas.restore(); 1281 1282 return true; 1283 } 1284 1285 /** 1286 * Generate a new description for this activity. This method is called 1287 * before pausing the activity and can, if desired, return some textual 1288 * description of its current state to be displayed to the user. 1289 * 1290 * <p>The default implementation returns null, which will cause you to 1291 * inherit the description from the previous activity. If all activities 1292 * return null, generally the label of the top activity will be used as the 1293 * description. 1294 * 1295 * @return A description of what the user is doing. It should be short and 1296 * sweet (only a few words). 1297 * 1298 * @see #onCreateThumbnail 1299 * @see #onSaveInstanceState 1300 * @see #onPause 1301 */ 1302 public CharSequence onCreateDescription() { 1303 return null; 1304 } 1305 1306 /** 1307 * Called when you are no longer visible to the user. You will next 1308 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1309 * depending on later user activity. 1310 * 1311 * <p>Note that this method may never be called, in low memory situations 1312 * where the system does not have enough memory to keep your activity's 1313 * process running after its {@link #onPause} method is called. 1314 * 1315 * <p><em>Derived classes must call through to the super class's 1316 * implementation of this method. If they do not, an exception will be 1317 * thrown.</em></p> 1318 * 1319 * @see #onRestart 1320 * @see #onResume 1321 * @see #onSaveInstanceState 1322 * @see #onDestroy 1323 */ 1324 protected void onStop() { 1325 mCalled = true; 1326 } 1327 1328 /** 1329 * Perform any final cleanup before an activity is destroyed. This can 1330 * happen either because the activity is finishing (someone called 1331 * {@link #finish} on it, or because the system is temporarily destroying 1332 * this instance of the activity to save space. You can distinguish 1333 * between these two scenarios with the {@link #isFinishing} method. 1334 * 1335 * <p><em>Note: do not count on this method being called as a place for 1336 * saving data! For example, if an activity is editing data in a content 1337 * provider, those edits should be committed in either {@link #onPause} or 1338 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1339 * free resources like threads that are associated with an activity, so 1340 * that a destroyed activity does not leave such things around while the 1341 * rest of its application is still running. There are situations where 1342 * the system will simply kill the activity's hosting process without 1343 * calling this method (or any others) in it, so it should not be used to 1344 * do things that are intended to remain around after the process goes 1345 * away. 1346 * 1347 * <p><em>Derived classes must call through to the super class's 1348 * implementation of this method. If they do not, an exception will be 1349 * thrown.</em></p> 1350 * 1351 * @see #onPause 1352 * @see #onStop 1353 * @see #finish 1354 * @see #isFinishing 1355 */ 1356 protected void onDestroy() { 1357 mCalled = true; 1358 1359 // dismiss any dialogs we are managing. 1360 if (mManagedDialogs != null) { 1361 final int numDialogs = mManagedDialogs.size(); 1362 for (int i = 0; i < numDialogs; i++) { 1363 final ManagedDialog md = mManagedDialogs.valueAt(i); 1364 if (md.mDialog.isShowing()) { 1365 md.mDialog.dismiss(); 1366 } 1367 } 1368 mManagedDialogs = null; 1369 } 1370 1371 // close any cursors we are managing. 1372 synchronized (mManagedCursors) { 1373 int numCursors = mManagedCursors.size(); 1374 for (int i = 0; i < numCursors; i++) { 1375 ManagedCursor c = mManagedCursors.get(i); 1376 if (c != null) { 1377 c.mCursor.close(); 1378 } 1379 } 1380 mManagedCursors.clear(); 1381 } 1382 1383 // Close any open search dialog 1384 if (mSearchManager != null) { 1385 mSearchManager.stopSearch(); 1386 } 1387 } 1388 1389 /** 1390 * Called by the system when the device configuration changes while your 1391 * activity is running. Note that this will <em>only</em> be called if 1392 * you have selected configurations you would like to handle with the 1393 * {@link android.R.attr#configChanges} attribute in your manifest. If 1394 * any configuration change occurs that is not selected to be reported 1395 * by that attribute, then instead of reporting it the system will stop 1396 * and restart the activity (to have it launched with the new 1397 * configuration). 1398 * 1399 * <p>At the time that this function has been called, your Resources 1400 * object will have been updated to return resource values matching the 1401 * new configuration. 1402 * 1403 * @param newConfig The new device configuration. 1404 */ 1405 public void onConfigurationChanged(Configuration newConfig) { 1406 mCalled = true; 1407 1408 if (mWindow != null) { 1409 // Pass the configuration changed event to the window 1410 mWindow.onConfigurationChanged(newConfig); 1411 } 1412 } 1413 1414 /** 1415 * If this activity is being destroyed because it can not handle a 1416 * configuration parameter being changed (and thus its 1417 * {@link #onConfigurationChanged(Configuration)} method is 1418 * <em>not</em> being called), then you can use this method to discover 1419 * the set of changes that have occurred while in the process of being 1420 * destroyed. Note that there is no guarantee that these will be 1421 * accurate (other changes could have happened at any time), so you should 1422 * only use this as an optimization hint. 1423 * 1424 * @return Returns a bit field of the configuration parameters that are 1425 * changing, as defined by the {@link android.content.res.Configuration} 1426 * class. 1427 */ 1428 public int getChangingConfigurations() { 1429 return mConfigChangeFlags; 1430 } 1431 1432 /** 1433 * Retrieve the non-configuration instance data that was previously 1434 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1435 * be available from the initial {@link #onCreate} and 1436 * {@link #onStart} calls to the new instance, allowing you to extract 1437 * any useful dynamic state from the previous instance. 1438 * 1439 * <p>Note that the data you retrieve here should <em>only</em> be used 1440 * as an optimization for handling configuration changes. You should always 1441 * be able to handle getting a null pointer back, and an activity must 1442 * still be able to restore itself to its previous state (through the 1443 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1444 * function returns null. 1445 * 1446 * @return Returns the object previously returned by 1447 * {@link #onRetainNonConfigurationInstance()}. 1448 */ 1449 public Object getLastNonConfigurationInstance() { 1450 return mLastNonConfigurationInstance; 1451 } 1452 1453 /** 1454 * Called by the system, as part of destroying an 1455 * activity due to a configuration change, when it is known that a new 1456 * instance will immediately be created for the new configuration. You 1457 * can return any object you like here, including the activity instance 1458 * itself, which can later be retrieved by calling 1459 * {@link #getLastNonConfigurationInstance()} in the new activity 1460 * instance. 1461 * 1462 * <p>This function is called purely as an optimization, and you must 1463 * not rely on it being called. When it is called, a number of guarantees 1464 * will be made to help optimize configuration switching: 1465 * <ul> 1466 * <li> The function will be called between {@link #onStop} and 1467 * {@link #onDestroy}. 1468 * <li> A new instance of the activity will <em>always</em> be immediately 1469 * created after this one's {@link #onDestroy()} is called. 1470 * <li> The object you return here will <em>always</em> be available from 1471 * the {@link #getLastNonConfigurationInstance()} method of the following 1472 * activity instance as described there. 1473 * </ul> 1474 * 1475 * <p>These guarantees are designed so that an activity can use this API 1476 * to propagate extensive state from the old to new activity instance, from 1477 * loaded bitmaps, to network connections, to evenly actively running 1478 * threads. Note that you should <em>not</em> propagate any data that 1479 * may change based on the configuration, including any data loaded from 1480 * resources such as strings, layouts, or drawables. 1481 * 1482 * @return Return any Object holding the desired state to propagate to the 1483 * next activity instance. 1484 */ 1485 public Object onRetainNonConfigurationInstance() { 1486 return null; 1487 } 1488 1489 /** 1490 * Retrieve the non-configuration instance data that was previously 1491 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1492 * be available from the initial {@link #onCreate} and 1493 * {@link #onStart} calls to the new instance, allowing you to extract 1494 * any useful dynamic state from the previous instance. 1495 * 1496 * <p>Note that the data you retrieve here should <em>only</em> be used 1497 * as an optimization for handling configuration changes. You should always 1498 * be able to handle getting a null pointer back, and an activity must 1499 * still be able to restore itself to its previous state (through the 1500 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1501 * function returns null. 1502 * 1503 * @return Returns the object previously returned by 1504 * {@link #onRetainNonConfigurationChildInstances()} 1505 */ 1506 HashMap<String,Object> getLastNonConfigurationChildInstances() { 1507 return mLastNonConfigurationChildInstances; 1508 } 1509 1510 /** 1511 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1512 * it should return either a mapping from child activity id strings to arbitrary objects, 1513 * or null. This method is intended to be used by Activity framework subclasses that control a 1514 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1515 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1516 */ 1517 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1518 return null; 1519 } 1520 1521 public void onLowMemory() { 1522 mCalled = true; 1523 } 1524 1525 /** 1526 * Start a series of edit operations on the Fragments associated with 1527 * this activity. 1528 */ 1529 public FragmentTransaction openFragmentTransaction() { 1530 return new FragmentTransactionImpl(); 1531 } 1532 1533 /** 1534 * Wrapper around 1535 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1536 * that gives the resulting {@link Cursor} to call 1537 * {@link #startManagingCursor} so that the activity will manage its 1538 * lifecycle for you. 1539 * 1540 * @param uri The URI of the content provider to query. 1541 * @param projection List of columns to return. 1542 * @param selection SQL WHERE clause. 1543 * @param sortOrder SQL ORDER BY clause. 1544 * 1545 * @return The Cursor that was returned by query(). 1546 * 1547 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1548 * @see #startManagingCursor 1549 * @hide 1550 */ 1551 public final Cursor managedQuery(Uri uri, 1552 String[] projection, 1553 String selection, 1554 String sortOrder) 1555 { 1556 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1557 if (c != null) { 1558 startManagingCursor(c); 1559 } 1560 return c; 1561 } 1562 1563 /** 1564 * Wrapper around 1565 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1566 * that gives the resulting {@link Cursor} to call 1567 * {@link #startManagingCursor} so that the activity will manage its 1568 * lifecycle for you. 1569 * 1570 * @param uri The URI of the content provider to query. 1571 * @param projection List of columns to return. 1572 * @param selection SQL WHERE clause. 1573 * @param selectionArgs The arguments to selection, if any ?s are pesent 1574 * @param sortOrder SQL ORDER BY clause. 1575 * 1576 * @return The Cursor that was returned by query(). 1577 * 1578 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1579 * @see #startManagingCursor 1580 */ 1581 public final Cursor managedQuery(Uri uri, 1582 String[] projection, 1583 String selection, 1584 String[] selectionArgs, 1585 String sortOrder) 1586 { 1587 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1588 if (c != null) { 1589 startManagingCursor(c); 1590 } 1591 return c; 1592 } 1593 1594 /** 1595 * Wrapper around {@link Cursor#commitUpdates()} that takes care of noting 1596 * that the Cursor needs to be requeried. You can call this method in 1597 * {@link #onPause} or {@link #onStop} to have the system call 1598 * {@link Cursor#requery} for you if the activity is later resumed. This 1599 * allows you to avoid determing when to do the requery yourself (which is 1600 * required for the Cursor to see any data changes that were committed with 1601 * it). 1602 * 1603 * @param c The Cursor whose changes are to be committed. 1604 * 1605 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1606 * @see #startManagingCursor 1607 * @see Cursor#commitUpdates() 1608 * @see Cursor#requery 1609 * @hide 1610 */ 1611 @Deprecated 1612 public void managedCommitUpdates(Cursor c) { 1613 synchronized (mManagedCursors) { 1614 final int N = mManagedCursors.size(); 1615 for (int i=0; i<N; i++) { 1616 ManagedCursor mc = mManagedCursors.get(i); 1617 if (mc.mCursor == c) { 1618 c.commitUpdates(); 1619 mc.mUpdated = true; 1620 return; 1621 } 1622 } 1623 throw new RuntimeException( 1624 "Cursor " + c + " is not currently managed"); 1625 } 1626 } 1627 1628 /** 1629 * This method allows the activity to take care of managing the given 1630 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1631 * That is, when the activity is stopped it will automatically call 1632 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1633 * it will call {@link Cursor#requery} for you. When the activity is 1634 * destroyed, all managed Cursors will be closed automatically. 1635 * 1636 * @param c The Cursor to be managed. 1637 * 1638 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1639 * @see #stopManagingCursor 1640 */ 1641 public void startManagingCursor(Cursor c) { 1642 synchronized (mManagedCursors) { 1643 mManagedCursors.add(new ManagedCursor(c)); 1644 } 1645 } 1646 1647 /** 1648 * Given a Cursor that was previously given to 1649 * {@link #startManagingCursor}, stop the activity's management of that 1650 * cursor. 1651 * 1652 * @param c The Cursor that was being managed. 1653 * 1654 * @see #startManagingCursor 1655 */ 1656 public void stopManagingCursor(Cursor c) { 1657 synchronized (mManagedCursors) { 1658 final int N = mManagedCursors.size(); 1659 for (int i=0; i<N; i++) { 1660 ManagedCursor mc = mManagedCursors.get(i); 1661 if (mc.mCursor == c) { 1662 mManagedCursors.remove(i); 1663 break; 1664 } 1665 } 1666 } 1667 } 1668 1669 /** 1670 * Control whether this activity is required to be persistent. By default 1671 * activities are not persistent; setting this to true will prevent the 1672 * system from stopping this activity or its process when running low on 1673 * resources. 1674 * 1675 * <p><em>You should avoid using this method</em>, it has severe negative 1676 * consequences on how well the system can manage its resources. A better 1677 * approach is to implement an application service that you control with 1678 * {@link Context#startService} and {@link Context#stopService}. 1679 * 1680 * @param isPersistent Control whether the current activity must be 1681 * persistent, true if so, false for the normal 1682 * behavior. 1683 */ 1684 public void setPersistent(boolean isPersistent) { 1685 if (mParent == null) { 1686 try { 1687 ActivityManagerNative.getDefault() 1688 .setPersistent(mToken, isPersistent); 1689 } catch (RemoteException e) { 1690 // Empty 1691 } 1692 } else { 1693 throw new RuntimeException("setPersistent() not yet supported for embedded activities"); 1694 } 1695 } 1696 1697 /** 1698 * Finds a view that was identified by the id attribute from the XML that 1699 * was processed in {@link #onCreate}. 1700 * 1701 * @return The view if found or null otherwise. 1702 */ 1703 public View findViewById(int id) { 1704 return getWindow().findViewById(id); 1705 } 1706 1707 /** 1708 * Set the activity content from a layout resource. The resource will be 1709 * inflated, adding all top-level views to the activity. 1710 * 1711 * @param layoutResID Resource ID to be inflated. 1712 */ 1713 public void setContentView(int layoutResID) { 1714 getWindow().setContentView(layoutResID); 1715 } 1716 1717 /** 1718 * Set the activity content to an explicit view. This view is placed 1719 * directly into the activity's view hierarchy. It can itself be a complex 1720 * view hierarhcy. 1721 * 1722 * @param view The desired content to display. 1723 */ 1724 public void setContentView(View view) { 1725 getWindow().setContentView(view); 1726 } 1727 1728 /** 1729 * Set the activity content to an explicit view. This view is placed 1730 * directly into the activity's view hierarchy. It can itself be a complex 1731 * view hierarhcy. 1732 * 1733 * @param view The desired content to display. 1734 * @param params Layout parameters for the view. 1735 */ 1736 public void setContentView(View view, ViewGroup.LayoutParams params) { 1737 getWindow().setContentView(view, params); 1738 } 1739 1740 /** 1741 * Add an additional content view to the activity. Added after any existing 1742 * ones in the activity -- existing views are NOT removed. 1743 * 1744 * @param view The desired content to display. 1745 * @param params Layout parameters for the view. 1746 */ 1747 public void addContentView(View view, ViewGroup.LayoutParams params) { 1748 getWindow().addContentView(view, params); 1749 } 1750 1751 /** 1752 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1753 * keys. 1754 * 1755 * @see #setDefaultKeyMode 1756 */ 1757 static public final int DEFAULT_KEYS_DISABLE = 0; 1758 /** 1759 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1760 * key handling. 1761 * 1762 * @see #setDefaultKeyMode 1763 */ 1764 static public final int DEFAULT_KEYS_DIALER = 1; 1765 /** 1766 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1767 * default key handling. 1768 * 1769 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1770 * 1771 * @see #setDefaultKeyMode 1772 */ 1773 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1774 /** 1775 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1776 * will start an application-defined search. (If the application or activity does not 1777 * actually define a search, the the keys will be ignored.) 1778 * 1779 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1780 * 1781 * @see #setDefaultKeyMode 1782 */ 1783 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1784 1785 /** 1786 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1787 * will start a global search (typically web search, but some platforms may define alternate 1788 * methods for global search) 1789 * 1790 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1791 * 1792 * @see #setDefaultKeyMode 1793 */ 1794 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1795 1796 /** 1797 * Select the default key handling for this activity. This controls what 1798 * will happen to key events that are not otherwise handled. The default 1799 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1800 * floor. Other modes allow you to launch the dialer 1801 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1802 * menu without requiring the menu key be held down 1803 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1804 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1805 * 1806 * <p>Note that the mode selected here does not impact the default 1807 * handling of system keys, such as the "back" and "menu" keys, and your 1808 * activity and its views always get a first chance to receive and handle 1809 * all application keys. 1810 * 1811 * @param mode The desired default key mode constant. 1812 * 1813 * @see #DEFAULT_KEYS_DISABLE 1814 * @see #DEFAULT_KEYS_DIALER 1815 * @see #DEFAULT_KEYS_SHORTCUT 1816 * @see #DEFAULT_KEYS_SEARCH_LOCAL 1817 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 1818 * @see #onKeyDown 1819 */ 1820 public final void setDefaultKeyMode(int mode) { 1821 mDefaultKeyMode = mode; 1822 1823 // Some modes use a SpannableStringBuilder to track & dispatch input events 1824 // This list must remain in sync with the switch in onKeyDown() 1825 switch (mode) { 1826 case DEFAULT_KEYS_DISABLE: 1827 case DEFAULT_KEYS_SHORTCUT: 1828 mDefaultKeySsb = null; // not used in these modes 1829 break; 1830 case DEFAULT_KEYS_DIALER: 1831 case DEFAULT_KEYS_SEARCH_LOCAL: 1832 case DEFAULT_KEYS_SEARCH_GLOBAL: 1833 mDefaultKeySsb = new SpannableStringBuilder(); 1834 Selection.setSelection(mDefaultKeySsb,0); 1835 break; 1836 default: 1837 throw new IllegalArgumentException(); 1838 } 1839 } 1840 1841 /** 1842 * Called when a key was pressed down and not handled by any of the views 1843 * inside of the activity. So, for example, key presses while the cursor 1844 * is inside a TextView will not trigger the event (unless it is a navigation 1845 * to another object) because TextView handles its own key presses. 1846 * 1847 * <p>If the focused view didn't want this event, this method is called. 1848 * 1849 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 1850 * by calling {@link #onBackPressed()}, though the behavior varies based 1851 * on the application compatibility mode: for 1852 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 1853 * it will set up the dispatch to call {@link #onKeyUp} where the action 1854 * will be performed; for earlier applications, it will perform the 1855 * action immediately in on-down, as those versions of the platform 1856 * behaved. 1857 * 1858 * <p>Other additional default key handling may be performed 1859 * if configured with {@link #setDefaultKeyMode}. 1860 * 1861 * @return Return <code>true</code> to prevent this event from being propagated 1862 * further, or <code>false</code> to indicate that you have not handled 1863 * this event and it should continue to be propagated. 1864 * @see #onKeyUp 1865 * @see android.view.KeyEvent 1866 */ 1867 public boolean onKeyDown(int keyCode, KeyEvent event) { 1868 if (keyCode == KeyEvent.KEYCODE_BACK) { 1869 if (getApplicationInfo().targetSdkVersion 1870 >= Build.VERSION_CODES.ECLAIR) { 1871 event.startTracking(); 1872 } else { 1873 onBackPressed(); 1874 } 1875 return true; 1876 } 1877 1878 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 1879 return false; 1880 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 1881 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 1882 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 1883 return true; 1884 } 1885 return false; 1886 } else { 1887 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 1888 boolean clearSpannable = false; 1889 boolean handled; 1890 if ((event.getRepeatCount() != 0) || event.isSystem()) { 1891 clearSpannable = true; 1892 handled = false; 1893 } else { 1894 handled = TextKeyListener.getInstance().onKeyDown( 1895 null, mDefaultKeySsb, keyCode, event); 1896 if (handled && mDefaultKeySsb.length() > 0) { 1897 // something useable has been typed - dispatch it now. 1898 1899 final String str = mDefaultKeySsb.toString(); 1900 clearSpannable = true; 1901 1902 switch (mDefaultKeyMode) { 1903 case DEFAULT_KEYS_DIALER: 1904 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 1905 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 1906 startActivity(intent); 1907 break; 1908 case DEFAULT_KEYS_SEARCH_LOCAL: 1909 startSearch(str, false, null, false); 1910 break; 1911 case DEFAULT_KEYS_SEARCH_GLOBAL: 1912 startSearch(str, false, null, true); 1913 break; 1914 } 1915 } 1916 } 1917 if (clearSpannable) { 1918 mDefaultKeySsb.clear(); 1919 mDefaultKeySsb.clearSpans(); 1920 Selection.setSelection(mDefaultKeySsb,0); 1921 } 1922 return handled; 1923 } 1924 } 1925 1926 /** 1927 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 1928 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 1929 * the event). 1930 */ 1931 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 1932 return false; 1933 } 1934 1935 /** 1936 * Called when a key was released and not handled by any of the views 1937 * inside of the activity. So, for example, key presses while the cursor 1938 * is inside a TextView will not trigger the event (unless it is a navigation 1939 * to another object) because TextView handles its own key presses. 1940 * 1941 * <p>The default implementation handles KEYCODE_BACK to stop the activity 1942 * and go back. 1943 * 1944 * @return Return <code>true</code> to prevent this event from being propagated 1945 * further, or <code>false</code> to indicate that you have not handled 1946 * this event and it should continue to be propagated. 1947 * @see #onKeyDown 1948 * @see KeyEvent 1949 */ 1950 public boolean onKeyUp(int keyCode, KeyEvent event) { 1951 if (getApplicationInfo().targetSdkVersion 1952 >= Build.VERSION_CODES.ECLAIR) { 1953 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 1954 && !event.isCanceled()) { 1955 onBackPressed(); 1956 return true; 1957 } 1958 } 1959 return false; 1960 } 1961 1962 /** 1963 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 1964 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 1965 * the event). 1966 */ 1967 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 1968 return false; 1969 } 1970 1971 /** 1972 * Called when the activity has detected the user's press of the back 1973 * key. The default implementation simply finishes the current activity, 1974 * but you can override this to do whatever you want. 1975 */ 1976 public void onBackPressed() { 1977 finish(); 1978 } 1979 1980 /** 1981 * Called when a touch screen event was not handled by any of the views 1982 * under it. This is most useful to process touch events that happen 1983 * outside of your window bounds, where there is no view to receive it. 1984 * 1985 * @param event The touch screen event being processed. 1986 * 1987 * @return Return true if you have consumed the event, false if you haven't. 1988 * The default implementation always returns false. 1989 */ 1990 public boolean onTouchEvent(MotionEvent event) { 1991 return false; 1992 } 1993 1994 /** 1995 * Called when the trackball was moved and not handled by any of the 1996 * views inside of the activity. So, for example, if the trackball moves 1997 * while focus is on a button, you will receive a call here because 1998 * buttons do not normally do anything with trackball events. The call 1999 * here happens <em>before</em> trackball movements are converted to 2000 * DPAD key events, which then get sent back to the view hierarchy, and 2001 * will be processed at the point for things like focus navigation. 2002 * 2003 * @param event The trackball event being processed. 2004 * 2005 * @return Return true if you have consumed the event, false if you haven't. 2006 * The default implementation always returns false. 2007 */ 2008 public boolean onTrackballEvent(MotionEvent event) { 2009 return false; 2010 } 2011 2012 /** 2013 * Called whenever a key, touch, or trackball event is dispatched to the 2014 * activity. Implement this method if you wish to know that the user has 2015 * interacted with the device in some way while your activity is running. 2016 * This callback and {@link #onUserLeaveHint} are intended to help 2017 * activities manage status bar notifications intelligently; specifically, 2018 * for helping activities determine the proper time to cancel a notfication. 2019 * 2020 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2021 * be accompanied by calls to {@link #onUserInteraction}. This 2022 * ensures that your activity will be told of relevant user activity such 2023 * as pulling down the notification pane and touching an item there. 2024 * 2025 * <p>Note that this callback will be invoked for the touch down action 2026 * that begins a touch gesture, but may not be invoked for the touch-moved 2027 * and touch-up actions that follow. 2028 * 2029 * @see #onUserLeaveHint() 2030 */ 2031 public void onUserInteraction() { 2032 } 2033 2034 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2035 // Update window manager if: we have a view, that view is 2036 // attached to its parent (which will be a RootView), and 2037 // this activity is not embedded. 2038 if (mParent == null) { 2039 View decor = mDecor; 2040 if (decor != null && decor.getParent() != null) { 2041 getWindowManager().updateViewLayout(decor, params); 2042 } 2043 } 2044 } 2045 2046 public void onContentChanged() { 2047 } 2048 2049 /** 2050 * Called when the current {@link Window} of the activity gains or loses 2051 * focus. This is the best indicator of whether this activity is visible 2052 * to the user. The default implementation clears the key tracking 2053 * state, so should always be called. 2054 * 2055 * <p>Note that this provides information about global focus state, which 2056 * is managed independently of activity lifecycles. As such, while focus 2057 * changes will generally have some relation to lifecycle changes (an 2058 * activity that is stopped will not generally get window focus), you 2059 * should not rely on any particular order between the callbacks here and 2060 * those in the other lifecycle methods such as {@link #onResume}. 2061 * 2062 * <p>As a general rule, however, a resumed activity will have window 2063 * focus... unless it has displayed other dialogs or popups that take 2064 * input focus, in which case the activity itself will not have focus 2065 * when the other windows have it. Likewise, the system may display 2066 * system-level windows (such as the status bar notification panel or 2067 * a system alert) which will temporarily take window input focus without 2068 * pausing the foreground activity. 2069 * 2070 * @param hasFocus Whether the window of this activity has focus. 2071 * 2072 * @see #hasWindowFocus() 2073 * @see #onResume 2074 * @see View#onWindowFocusChanged(boolean) 2075 */ 2076 public void onWindowFocusChanged(boolean hasFocus) { 2077 } 2078 2079 /** 2080 * Called when the main window associated with the activity has been 2081 * attached to the window manager. 2082 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2083 * for more information. 2084 * @see View#onAttachedToWindow 2085 */ 2086 public void onAttachedToWindow() { 2087 } 2088 2089 /** 2090 * Called when the main window associated with the activity has been 2091 * detached from the window manager. 2092 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2093 * for more information. 2094 * @see View#onDetachedFromWindow 2095 */ 2096 public void onDetachedFromWindow() { 2097 } 2098 2099 /** 2100 * Returns true if this activity's <em>main</em> window currently has window focus. 2101 * Note that this is not the same as the view itself having focus. 2102 * 2103 * @return True if this activity's main window currently has window focus. 2104 * 2105 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2106 */ 2107 public boolean hasWindowFocus() { 2108 Window w = getWindow(); 2109 if (w != null) { 2110 View d = w.getDecorView(); 2111 if (d != null) { 2112 return d.hasWindowFocus(); 2113 } 2114 } 2115 return false; 2116 } 2117 2118 /** 2119 * Called to process key events. You can override this to intercept all 2120 * key events before they are dispatched to the window. Be sure to call 2121 * this implementation for key events that should be handled normally. 2122 * 2123 * @param event The key event. 2124 * 2125 * @return boolean Return true if this event was consumed. 2126 */ 2127 public boolean dispatchKeyEvent(KeyEvent event) { 2128 onUserInteraction(); 2129 Window win = getWindow(); 2130 if (win.superDispatchKeyEvent(event)) { 2131 return true; 2132 } 2133 View decor = mDecor; 2134 if (decor == null) decor = win.getDecorView(); 2135 return event.dispatch(this, decor != null 2136 ? decor.getKeyDispatcherState() : null, this); 2137 } 2138 2139 /** 2140 * Called to process touch screen events. You can override this to 2141 * intercept all touch screen events before they are dispatched to the 2142 * window. Be sure to call this implementation for touch screen events 2143 * that should be handled normally. 2144 * 2145 * @param ev The touch screen event. 2146 * 2147 * @return boolean Return true if this event was consumed. 2148 */ 2149 public boolean dispatchTouchEvent(MotionEvent ev) { 2150 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2151 onUserInteraction(); 2152 } 2153 if (getWindow().superDispatchTouchEvent(ev)) { 2154 return true; 2155 } 2156 return onTouchEvent(ev); 2157 } 2158 2159 /** 2160 * Called to process trackball events. You can override this to 2161 * intercept all trackball events before they are dispatched to the 2162 * window. Be sure to call this implementation for trackball events 2163 * that should be handled normally. 2164 * 2165 * @param ev The trackball event. 2166 * 2167 * @return boolean Return true if this event was consumed. 2168 */ 2169 public boolean dispatchTrackballEvent(MotionEvent ev) { 2170 onUserInteraction(); 2171 if (getWindow().superDispatchTrackballEvent(ev)) { 2172 return true; 2173 } 2174 return onTrackballEvent(ev); 2175 } 2176 2177 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2178 event.setClassName(getClass().getName()); 2179 event.setPackageName(getPackageName()); 2180 2181 LayoutParams params = getWindow().getAttributes(); 2182 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2183 (params.height == LayoutParams.MATCH_PARENT); 2184 event.setFullScreen(isFullScreen); 2185 2186 CharSequence title = getTitle(); 2187 if (!TextUtils.isEmpty(title)) { 2188 event.getText().add(title); 2189 } 2190 2191 return true; 2192 } 2193 2194 /** 2195 * Default implementation of 2196 * {@link android.view.Window.Callback#onCreatePanelView} 2197 * for activities. This 2198 * simply returns null so that all panel sub-windows will have the default 2199 * menu behavior. 2200 */ 2201 public View onCreatePanelView(int featureId) { 2202 return null; 2203 } 2204 2205 /** 2206 * Default implementation of 2207 * {@link android.view.Window.Callback#onCreatePanelMenu} 2208 * for activities. This calls through to the new 2209 * {@link #onCreateOptionsMenu} method for the 2210 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2211 * so that subclasses of Activity don't need to deal with feature codes. 2212 */ 2213 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2214 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2215 return onCreateOptionsMenu(menu); 2216 } 2217 return false; 2218 } 2219 2220 /** 2221 * Default implementation of 2222 * {@link android.view.Window.Callback#onPreparePanel} 2223 * for activities. This 2224 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2225 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2226 * panel, so that subclasses of 2227 * Activity don't need to deal with feature codes. 2228 */ 2229 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2230 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2231 boolean goforit = onPrepareOptionsMenu(menu); 2232 return goforit && menu.hasVisibleItems(); 2233 } 2234 return true; 2235 } 2236 2237 /** 2238 * {@inheritDoc} 2239 * 2240 * @return The default implementation returns true. 2241 */ 2242 public boolean onMenuOpened(int featureId, Menu menu) { 2243 return true; 2244 } 2245 2246 /** 2247 * Default implementation of 2248 * {@link android.view.Window.Callback#onMenuItemSelected} 2249 * for activities. This calls through to the new 2250 * {@link #onOptionsItemSelected} method for the 2251 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2252 * panel, so that subclasses of 2253 * Activity don't need to deal with feature codes. 2254 */ 2255 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2256 switch (featureId) { 2257 case Window.FEATURE_OPTIONS_PANEL: 2258 // Put event logging here so it gets called even if subclass 2259 // doesn't call through to superclass's implmeentation of each 2260 // of these methods below 2261 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2262 return onOptionsItemSelected(item); 2263 2264 case Window.FEATURE_CONTEXT_MENU: 2265 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2266 return onContextItemSelected(item); 2267 2268 default: 2269 return false; 2270 } 2271 } 2272 2273 /** 2274 * Default implementation of 2275 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2276 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2277 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2278 * so that subclasses of Activity don't need to deal with feature codes. 2279 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2280 * {@link #onContextMenuClosed(Menu)} will be called. 2281 */ 2282 public void onPanelClosed(int featureId, Menu menu) { 2283 switch (featureId) { 2284 case Window.FEATURE_OPTIONS_PANEL: 2285 onOptionsMenuClosed(menu); 2286 break; 2287 2288 case Window.FEATURE_CONTEXT_MENU: 2289 onContextMenuClosed(menu); 2290 break; 2291 } 2292 } 2293 2294 /** 2295 * Initialize the contents of the Activity's standard options menu. You 2296 * should place your menu items in to <var>menu</var>. 2297 * 2298 * <p>This is only called once, the first time the options menu is 2299 * displayed. To update the menu every time it is displayed, see 2300 * {@link #onPrepareOptionsMenu}. 2301 * 2302 * <p>The default implementation populates the menu with standard system 2303 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2304 * they will be correctly ordered with application-defined menu items. 2305 * Deriving classes should always call through to the base implementation. 2306 * 2307 * <p>You can safely hold on to <var>menu</var> (and any items created 2308 * from it), making modifications to it as desired, until the next 2309 * time onCreateOptionsMenu() is called. 2310 * 2311 * <p>When you add items to the menu, you can implement the Activity's 2312 * {@link #onOptionsItemSelected} method to handle them there. 2313 * 2314 * @param menu The options menu in which you place your items. 2315 * 2316 * @return You must return true for the menu to be displayed; 2317 * if you return false it will not be shown. 2318 * 2319 * @see #onPrepareOptionsMenu 2320 * @see #onOptionsItemSelected 2321 */ 2322 public boolean onCreateOptionsMenu(Menu menu) { 2323 if (mParent != null) { 2324 return mParent.onCreateOptionsMenu(menu); 2325 } 2326 return true; 2327 } 2328 2329 /** 2330 * Prepare the Screen's standard options menu to be displayed. This is 2331 * called right before the menu is shown, every time it is shown. You can 2332 * use this method to efficiently enable/disable items or otherwise 2333 * dynamically modify the contents. 2334 * 2335 * <p>The default implementation updates the system menu items based on the 2336 * activity's state. Deriving classes should always call through to the 2337 * base class implementation. 2338 * 2339 * @param menu The options menu as last shown or first initialized by 2340 * onCreateOptionsMenu(). 2341 * 2342 * @return You must return true for the menu to be displayed; 2343 * if you return false it will not be shown. 2344 * 2345 * @see #onCreateOptionsMenu 2346 */ 2347 public boolean onPrepareOptionsMenu(Menu menu) { 2348 if (mParent != null) { 2349 return mParent.onPrepareOptionsMenu(menu); 2350 } 2351 return true; 2352 } 2353 2354 /** 2355 * This hook is called whenever an item in your options menu is selected. 2356 * The default implementation simply returns false to have the normal 2357 * processing happen (calling the item's Runnable or sending a message to 2358 * its Handler as appropriate). You can use this method for any items 2359 * for which you would like to do processing without those other 2360 * facilities. 2361 * 2362 * <p>Derived classes should call through to the base class for it to 2363 * perform the default menu handling. 2364 * 2365 * @param item The menu item that was selected. 2366 * 2367 * @return boolean Return false to allow normal menu processing to 2368 * proceed, true to consume it here. 2369 * 2370 * @see #onCreateOptionsMenu 2371 */ 2372 public boolean onOptionsItemSelected(MenuItem item) { 2373 if (mParent != null) { 2374 return mParent.onOptionsItemSelected(item); 2375 } 2376 return false; 2377 } 2378 2379 /** 2380 * This hook is called whenever the options menu is being closed (either by the user canceling 2381 * the menu with the back/menu button, or when an item is selected). 2382 * 2383 * @param menu The options menu as last shown or first initialized by 2384 * onCreateOptionsMenu(). 2385 */ 2386 public void onOptionsMenuClosed(Menu menu) { 2387 if (mParent != null) { 2388 mParent.onOptionsMenuClosed(menu); 2389 } 2390 } 2391 2392 /** 2393 * Programmatically opens the options menu. If the options menu is already 2394 * open, this method does nothing. 2395 */ 2396 public void openOptionsMenu() { 2397 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2398 } 2399 2400 /** 2401 * Progammatically closes the options menu. If the options menu is already 2402 * closed, this method does nothing. 2403 */ 2404 public void closeOptionsMenu() { 2405 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2406 } 2407 2408 /** 2409 * Called when a context menu for the {@code view} is about to be shown. 2410 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2411 * time the context menu is about to be shown and should be populated for 2412 * the view (or item inside the view for {@link AdapterView} subclasses, 2413 * this can be found in the {@code menuInfo})). 2414 * <p> 2415 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2416 * item has been selected. 2417 * <p> 2418 * It is not safe to hold onto the context menu after this method returns. 2419 * {@inheritDoc} 2420 */ 2421 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2422 } 2423 2424 /** 2425 * Registers a context menu to be shown for the given view (multiple views 2426 * can show the context menu). This method will set the 2427 * {@link OnCreateContextMenuListener} on the view to this activity, so 2428 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2429 * called when it is time to show the context menu. 2430 * 2431 * @see #unregisterForContextMenu(View) 2432 * @param view The view that should show a context menu. 2433 */ 2434 public void registerForContextMenu(View view) { 2435 view.setOnCreateContextMenuListener(this); 2436 } 2437 2438 /** 2439 * Prevents a context menu to be shown for the given view. This method will remove the 2440 * {@link OnCreateContextMenuListener} on the view. 2441 * 2442 * @see #registerForContextMenu(View) 2443 * @param view The view that should stop showing a context menu. 2444 */ 2445 public void unregisterForContextMenu(View view) { 2446 view.setOnCreateContextMenuListener(null); 2447 } 2448 2449 /** 2450 * Programmatically opens the context menu for a particular {@code view}. 2451 * The {@code view} should have been added via 2452 * {@link #registerForContextMenu(View)}. 2453 * 2454 * @param view The view to show the context menu for. 2455 */ 2456 public void openContextMenu(View view) { 2457 view.showContextMenu(); 2458 } 2459 2460 /** 2461 * Programmatically closes the most recently opened context menu, if showing. 2462 */ 2463 public void closeContextMenu() { 2464 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2465 } 2466 2467 /** 2468 * This hook is called whenever an item in a context menu is selected. The 2469 * default implementation simply returns false to have the normal processing 2470 * happen (calling the item's Runnable or sending a message to its Handler 2471 * as appropriate). You can use this method for any items for which you 2472 * would like to do processing without those other facilities. 2473 * <p> 2474 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2475 * View that added this menu item. 2476 * <p> 2477 * Derived classes should call through to the base class for it to perform 2478 * the default menu handling. 2479 * 2480 * @param item The context menu item that was selected. 2481 * @return boolean Return false to allow normal context menu processing to 2482 * proceed, true to consume it here. 2483 */ 2484 public boolean onContextItemSelected(MenuItem item) { 2485 if (mParent != null) { 2486 return mParent.onContextItemSelected(item); 2487 } 2488 return false; 2489 } 2490 2491 /** 2492 * This hook is called whenever the context menu is being closed (either by 2493 * the user canceling the menu with the back/menu button, or when an item is 2494 * selected). 2495 * 2496 * @param menu The context menu that is being closed. 2497 */ 2498 public void onContextMenuClosed(Menu menu) { 2499 if (mParent != null) { 2500 mParent.onContextMenuClosed(menu); 2501 } 2502 } 2503 2504 /** 2505 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2506 */ 2507 @Deprecated 2508 protected Dialog onCreateDialog(int id) { 2509 return null; 2510 } 2511 2512 /** 2513 * Callback for creating dialogs that are managed (saved and restored) for you 2514 * by the activity. The default implementation calls through to 2515 * {@link #onCreateDialog(int)} for compatibility. 2516 * 2517 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2518 * this method the first time, and hang onto it thereafter. Any dialog 2519 * that is created by this method will automatically be saved and restored 2520 * for you, including whether it is showing. 2521 * 2522 * <p>If you would like the activity to manage saving and restoring dialogs 2523 * for you, you should override this method and handle any ids that are 2524 * passed to {@link #showDialog}. 2525 * 2526 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2527 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2528 * 2529 * @param id The id of the dialog. 2530 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2531 * @return The dialog. If you return null, the dialog will not be created. 2532 * 2533 * @see #onPrepareDialog(int, Dialog, Bundle) 2534 * @see #showDialog(int, Bundle) 2535 * @see #dismissDialog(int) 2536 * @see #removeDialog(int) 2537 */ 2538 protected Dialog onCreateDialog(int id, Bundle args) { 2539 return onCreateDialog(id); 2540 } 2541 2542 /** 2543 * @deprecated Old no-arguments version of 2544 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2545 */ 2546 @Deprecated 2547 protected void onPrepareDialog(int id, Dialog dialog) { 2548 dialog.setOwnerActivity(this); 2549 } 2550 2551 /** 2552 * Provides an opportunity to prepare a managed dialog before it is being 2553 * shown. The default implementation calls through to 2554 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2555 * 2556 * <p> 2557 * Override this if you need to update a managed dialog based on the state 2558 * of the application each time it is shown. For example, a time picker 2559 * dialog might want to be updated with the current time. You should call 2560 * through to the superclass's implementation. The default implementation 2561 * will set this Activity as the owner activity on the Dialog. 2562 * 2563 * @param id The id of the managed dialog. 2564 * @param dialog The dialog. 2565 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2566 * @see #onCreateDialog(int, Bundle) 2567 * @see #showDialog(int) 2568 * @see #dismissDialog(int) 2569 * @see #removeDialog(int) 2570 */ 2571 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 2572 onPrepareDialog(id, dialog); 2573 } 2574 2575 /** 2576 * Simple version of {@link #showDialog(int, Bundle)} that does not 2577 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 2578 * with null arguments. 2579 */ 2580 public final void showDialog(int id) { 2581 showDialog(id, null); 2582 } 2583 2584 /** 2585 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 2586 * will be made with the same id the first time this is called for a given 2587 * id. From thereafter, the dialog will be automatically saved and restored. 2588 * 2589 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 2590 * be made to provide an opportunity to do any timely preparation. 2591 * 2592 * @param id The id of the managed dialog. 2593 * @param args Arguments to pass through to the dialog. These will be saved 2594 * and restored for you. Note that if the dialog is already created, 2595 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 2596 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 2597 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 2598 * @return Returns true if the Dialog was created; false is returned if 2599 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 2600 * 2601 * @see Dialog 2602 * @see #onCreateDialog(int, Bundle) 2603 * @see #onPrepareDialog(int, Dialog, Bundle) 2604 * @see #dismissDialog(int) 2605 * @see #removeDialog(int) 2606 */ 2607 public final boolean showDialog(int id, Bundle args) { 2608 if (mManagedDialogs == null) { 2609 mManagedDialogs = new SparseArray<ManagedDialog>(); 2610 } 2611 ManagedDialog md = mManagedDialogs.get(id); 2612 if (md == null) { 2613 md = new ManagedDialog(); 2614 md.mDialog = createDialog(id, null, args); 2615 if (md.mDialog == null) { 2616 return false; 2617 } 2618 mManagedDialogs.put(id, md); 2619 } 2620 2621 md.mArgs = args; 2622 onPrepareDialog(id, md.mDialog, args); 2623 md.mDialog.show(); 2624 return true; 2625 } 2626 2627 /** 2628 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 2629 * 2630 * @param id The id of the managed dialog. 2631 * 2632 * @throws IllegalArgumentException if the id was not previously shown via 2633 * {@link #showDialog(int)}. 2634 * 2635 * @see #onCreateDialog(int, Bundle) 2636 * @see #onPrepareDialog(int, Dialog, Bundle) 2637 * @see #showDialog(int) 2638 * @see #removeDialog(int) 2639 */ 2640 public final void dismissDialog(int id) { 2641 if (mManagedDialogs == null) { 2642 throw missingDialog(id); 2643 } 2644 2645 final ManagedDialog md = mManagedDialogs.get(id); 2646 if (md == null) { 2647 throw missingDialog(id); 2648 } 2649 md.mDialog.dismiss(); 2650 } 2651 2652 /** 2653 * Creates an exception to throw if a user passed in a dialog id that is 2654 * unexpected. 2655 */ 2656 private IllegalArgumentException missingDialog(int id) { 2657 return new IllegalArgumentException("no dialog with id " + id + " was ever " 2658 + "shown via Activity#showDialog"); 2659 } 2660 2661 /** 2662 * Removes any internal references to a dialog managed by this Activity. 2663 * If the dialog is showing, it will dismiss it as part of the clean up. 2664 * 2665 * <p>This can be useful if you know that you will never show a dialog again and 2666 * want to avoid the overhead of saving and restoring it in the future. 2667 * 2668 * @param id The id of the managed dialog. 2669 * 2670 * @see #onCreateDialog(int, Bundle) 2671 * @see #onPrepareDialog(int, Dialog, Bundle) 2672 * @see #showDialog(int) 2673 * @see #dismissDialog(int) 2674 */ 2675 public final void removeDialog(int id) { 2676 if (mManagedDialogs == null) { 2677 return; 2678 } 2679 2680 final ManagedDialog md = mManagedDialogs.get(id); 2681 if (md == null) { 2682 return; 2683 } 2684 2685 md.mDialog.dismiss(); 2686 mManagedDialogs.remove(id); 2687 } 2688 2689 /** 2690 * This hook is called when the user signals the desire to start a search. 2691 * 2692 * <p>You can use this function as a simple way to launch the search UI, in response to a 2693 * menu item, search button, or other widgets within your activity. Unless overidden, 2694 * calling this function is the same as calling 2695 * {@link #startSearch startSearch(null, false, null, false)}, which launches 2696 * search for the current activity as specified in its manifest, see {@link SearchManager}. 2697 * 2698 * <p>You can override this function to force global search, e.g. in response to a dedicated 2699 * search key, or to block search entirely (by simply returning false). 2700 * 2701 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 2702 * The default implementation always returns {@code true}. 2703 * 2704 * @see android.app.SearchManager 2705 */ 2706 public boolean onSearchRequested() { 2707 startSearch(null, false, null, false); 2708 return true; 2709 } 2710 2711 /** 2712 * This hook is called to launch the search UI. 2713 * 2714 * <p>It is typically called from onSearchRequested(), either directly from 2715 * Activity.onSearchRequested() or from an overridden version in any given 2716 * Activity. If your goal is simply to activate search, it is preferred to call 2717 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 2718 * is to inject specific data such as context data, it is preferred to <i>override</i> 2719 * onSearchRequested(), so that any callers to it will benefit from the override. 2720 * 2721 * @param initialQuery Any non-null non-empty string will be inserted as 2722 * pre-entered text in the search query box. 2723 * @param selectInitialQuery If true, the intial query will be preselected, which means that 2724 * any further typing will replace it. This is useful for cases where an entire pre-formed 2725 * query is being inserted. If false, the selection point will be placed at the end of the 2726 * inserted query. This is useful when the inserted query is text that the user entered, 2727 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 2728 * if initialQuery is a non-empty string.</i> 2729 * @param appSearchData An application can insert application-specific 2730 * context here, in order to improve quality or specificity of its own 2731 * searches. This data will be returned with SEARCH intent(s). Null if 2732 * no extra data is required. 2733 * @param globalSearch If false, this will only launch the search that has been specifically 2734 * defined by the application (which is usually defined as a local search). If no default 2735 * search is defined in the current application or activity, global search will be launched. 2736 * If true, this will always launch a platform-global (e.g. web-based) search instead. 2737 * 2738 * @see android.app.SearchManager 2739 * @see #onSearchRequested 2740 */ 2741 public void startSearch(String initialQuery, boolean selectInitialQuery, 2742 Bundle appSearchData, boolean globalSearch) { 2743 ensureSearchManager(); 2744 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 2745 appSearchData, globalSearch); 2746 } 2747 2748 /** 2749 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 2750 * the search dialog. Made available for testing purposes. 2751 * 2752 * @param query The query to trigger. If empty, the request will be ignored. 2753 * @param appSearchData An application can insert application-specific 2754 * context here, in order to improve quality or specificity of its own 2755 * searches. This data will be returned with SEARCH intent(s). Null if 2756 * no extra data is required. 2757 */ 2758 public void triggerSearch(String query, Bundle appSearchData) { 2759 ensureSearchManager(); 2760 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 2761 } 2762 2763 /** 2764 * Request that key events come to this activity. Use this if your 2765 * activity has no views with focus, but the activity still wants 2766 * a chance to process key events. 2767 * 2768 * @see android.view.Window#takeKeyEvents 2769 */ 2770 public void takeKeyEvents(boolean get) { 2771 getWindow().takeKeyEvents(get); 2772 } 2773 2774 /** 2775 * Enable extended window features. This is a convenience for calling 2776 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 2777 * 2778 * @param featureId The desired feature as defined in 2779 * {@link android.view.Window}. 2780 * @return Returns true if the requested feature is supported and now 2781 * enabled. 2782 * 2783 * @see android.view.Window#requestFeature 2784 */ 2785 public final boolean requestWindowFeature(int featureId) { 2786 return getWindow().requestFeature(featureId); 2787 } 2788 2789 /** 2790 * Convenience for calling 2791 * {@link android.view.Window#setFeatureDrawableResource}. 2792 */ 2793 public final void setFeatureDrawableResource(int featureId, int resId) { 2794 getWindow().setFeatureDrawableResource(featureId, resId); 2795 } 2796 2797 /** 2798 * Convenience for calling 2799 * {@link android.view.Window#setFeatureDrawableUri}. 2800 */ 2801 public final void setFeatureDrawableUri(int featureId, Uri uri) { 2802 getWindow().setFeatureDrawableUri(featureId, uri); 2803 } 2804 2805 /** 2806 * Convenience for calling 2807 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 2808 */ 2809 public final void setFeatureDrawable(int featureId, Drawable drawable) { 2810 getWindow().setFeatureDrawable(featureId, drawable); 2811 } 2812 2813 /** 2814 * Convenience for calling 2815 * {@link android.view.Window#setFeatureDrawableAlpha}. 2816 */ 2817 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 2818 getWindow().setFeatureDrawableAlpha(featureId, alpha); 2819 } 2820 2821 /** 2822 * Convenience for calling 2823 * {@link android.view.Window#getLayoutInflater}. 2824 */ 2825 public LayoutInflater getLayoutInflater() { 2826 return getWindow().getLayoutInflater(); 2827 } 2828 2829 /** 2830 * Returns a {@link MenuInflater} with this context. 2831 */ 2832 public MenuInflater getMenuInflater() { 2833 return new MenuInflater(this); 2834 } 2835 2836 @Override 2837 protected void onApplyThemeResource(Resources.Theme theme, int resid, 2838 boolean first) { 2839 if (mParent == null) { 2840 super.onApplyThemeResource(theme, resid, first); 2841 } else { 2842 try { 2843 theme.setTo(mParent.getTheme()); 2844 } catch (Exception e) { 2845 // Empty 2846 } 2847 theme.applyStyle(resid, false); 2848 } 2849 } 2850 2851 /** 2852 * Launch an activity for which you would like a result when it finished. 2853 * When this activity exits, your 2854 * onActivityResult() method will be called with the given requestCode. 2855 * Using a negative requestCode is the same as calling 2856 * {@link #startActivity} (the activity is not launched as a sub-activity). 2857 * 2858 * <p>Note that this method should only be used with Intent protocols 2859 * that are defined to return a result. In other protocols (such as 2860 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 2861 * not get the result when you expect. For example, if the activity you 2862 * are launching uses the singleTask launch mode, it will not run in your 2863 * task and thus you will immediately receive a cancel result. 2864 * 2865 * <p>As a special case, if you call startActivityForResult() with a requestCode 2866 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 2867 * activity, then your window will not be displayed until a result is 2868 * returned back from the started activity. This is to avoid visible 2869 * flickering when redirecting to another activity. 2870 * 2871 * <p>This method throws {@link android.content.ActivityNotFoundException} 2872 * if there was no Activity found to run the given Intent. 2873 * 2874 * @param intent The intent to start. 2875 * @param requestCode If >= 0, this code will be returned in 2876 * onActivityResult() when the activity exits. 2877 * 2878 * @throws android.content.ActivityNotFoundException 2879 * 2880 * @see #startActivity 2881 */ 2882 public void startActivityForResult(Intent intent, int requestCode) { 2883 if (mParent == null) { 2884 Instrumentation.ActivityResult ar = 2885 mInstrumentation.execStartActivity( 2886 this, mMainThread.getApplicationThread(), mToken, this, 2887 intent, requestCode); 2888 if (ar != null) { 2889 mMainThread.sendActivityResult( 2890 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 2891 ar.getResultData()); 2892 } 2893 if (requestCode >= 0) { 2894 // If this start is requesting a result, we can avoid making 2895 // the activity visible until the result is received. Setting 2896 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 2897 // activity hidden during this time, to avoid flickering. 2898 // This can only be done when a result is requested because 2899 // that guarantees we will get information back when the 2900 // activity is finished, no matter what happens to it. 2901 mStartedActivity = true; 2902 } 2903 } else { 2904 mParent.startActivityFromChild(this, intent, requestCode); 2905 } 2906 } 2907 2908 /** 2909 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 2910 * to use a IntentSender to describe the activity to be started. If 2911 * the IntentSender is for an activity, that activity will be started 2912 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 2913 * here; otherwise, its associated action will be executed (such as 2914 * sending a broadcast) as if you had called 2915 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 2916 * 2917 * @param intent The IntentSender to launch. 2918 * @param requestCode If >= 0, this code will be returned in 2919 * onActivityResult() when the activity exits. 2920 * @param fillInIntent If non-null, this will be provided as the 2921 * intent parameter to {@link IntentSender#sendIntent}. 2922 * @param flagsMask Intent flags in the original IntentSender that you 2923 * would like to change. 2924 * @param flagsValues Desired values for any bits set in 2925 * <var>flagsMask</var> 2926 * @param extraFlags Always set to 0. 2927 */ 2928 public void startIntentSenderForResult(IntentSender intent, int requestCode, 2929 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 2930 throws IntentSender.SendIntentException { 2931 if (mParent == null) { 2932 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 2933 flagsMask, flagsValues, this); 2934 } else { 2935 mParent.startIntentSenderFromChild(this, intent, requestCode, 2936 fillInIntent, flagsMask, flagsValues, extraFlags); 2937 } 2938 } 2939 2940 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 2941 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity) 2942 throws IntentSender.SendIntentException { 2943 try { 2944 String resolvedType = null; 2945 if (fillInIntent != null) { 2946 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 2947 } 2948 int result = ActivityManagerNative.getDefault() 2949 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 2950 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 2951 requestCode, flagsMask, flagsValues); 2952 if (result == IActivityManager.START_CANCELED) { 2953 throw new IntentSender.SendIntentException(); 2954 } 2955 Instrumentation.checkStartActivityResult(result, null); 2956 } catch (RemoteException e) { 2957 } 2958 if (requestCode >= 0) { 2959 // If this start is requesting a result, we can avoid making 2960 // the activity visible until the result is received. Setting 2961 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 2962 // activity hidden during this time, to avoid flickering. 2963 // This can only be done when a result is requested because 2964 // that guarantees we will get information back when the 2965 // activity is finished, no matter what happens to it. 2966 mStartedActivity = true; 2967 } 2968 } 2969 2970 /** 2971 * Launch a new activity. You will not receive any information about when 2972 * the activity exits. This implementation overrides the base version, 2973 * providing information about 2974 * the activity performing the launch. Because of this additional 2975 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 2976 * required; if not specified, the new activity will be added to the 2977 * task of the caller. 2978 * 2979 * <p>This method throws {@link android.content.ActivityNotFoundException} 2980 * if there was no Activity found to run the given Intent. 2981 * 2982 * @param intent The intent to start. 2983 * 2984 * @throws android.content.ActivityNotFoundException 2985 * 2986 * @see #startActivityForResult 2987 */ 2988 @Override 2989 public void startActivity(Intent intent) { 2990 startActivityForResult(intent, -1); 2991 } 2992 2993 /** 2994 * Like {@link #startActivity(Intent)}, but taking a IntentSender 2995 * to start; see 2996 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 2997 * for more information. 2998 * 2999 * @param intent The IntentSender to launch. 3000 * @param fillInIntent If non-null, this will be provided as the 3001 * intent parameter to {@link IntentSender#sendIntent}. 3002 * @param flagsMask Intent flags in the original IntentSender that you 3003 * would like to change. 3004 * @param flagsValues Desired values for any bits set in 3005 * <var>flagsMask</var> 3006 * @param extraFlags Always set to 0. 3007 */ 3008 public void startIntentSender(IntentSender intent, 3009 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3010 throws IntentSender.SendIntentException { 3011 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3012 flagsValues, extraFlags); 3013 } 3014 3015 /** 3016 * A special variation to launch an activity only if a new activity 3017 * instance is needed to handle the given Intent. In other words, this is 3018 * just like {@link #startActivityForResult(Intent, int)} except: if you are 3019 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 3020 * singleTask or singleTop 3021 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 3022 * and the activity 3023 * that handles <var>intent</var> is the same as your currently running 3024 * activity, then a new instance is not needed. In this case, instead of 3025 * the normal behavior of calling {@link #onNewIntent} this function will 3026 * return and you can handle the Intent yourself. 3027 * 3028 * <p>This function can only be called from a top-level activity; if it is 3029 * called from a child activity, a runtime exception will be thrown. 3030 * 3031 * @param intent The intent to start. 3032 * @param requestCode If >= 0, this code will be returned in 3033 * onActivityResult() when the activity exits, as described in 3034 * {@link #startActivityForResult}. 3035 * 3036 * @return If a new activity was launched then true is returned; otherwise 3037 * false is returned and you must handle the Intent yourself. 3038 * 3039 * @see #startActivity 3040 * @see #startActivityForResult 3041 */ 3042 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 3043 if (mParent == null) { 3044 int result = IActivityManager.START_RETURN_INTENT_TO_CALLER; 3045 try { 3046 result = ActivityManagerNative.getDefault() 3047 .startActivity(mMainThread.getApplicationThread(), 3048 intent, intent.resolveTypeIfNeeded( 3049 getContentResolver()), 3050 null, 0, 3051 mToken, mEmbeddedID, requestCode, true, false); 3052 } catch (RemoteException e) { 3053 // Empty 3054 } 3055 3056 Instrumentation.checkStartActivityResult(result, intent); 3057 3058 if (requestCode >= 0) { 3059 // If this start is requesting a result, we can avoid making 3060 // the activity visible until the result is received. Setting 3061 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3062 // activity hidden during this time, to avoid flickering. 3063 // This can only be done when a result is requested because 3064 // that guarantees we will get information back when the 3065 // activity is finished, no matter what happens to it. 3066 mStartedActivity = true; 3067 } 3068 return result != IActivityManager.START_RETURN_INTENT_TO_CALLER; 3069 } 3070 3071 throw new UnsupportedOperationException( 3072 "startActivityIfNeeded can only be called from a top-level activity"); 3073 } 3074 3075 /** 3076 * Special version of starting an activity, for use when you are replacing 3077 * other activity components. You can use this to hand the Intent off 3078 * to the next Activity that can handle it. You typically call this in 3079 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3080 * 3081 * @param intent The intent to dispatch to the next activity. For 3082 * correct behavior, this must be the same as the Intent that started 3083 * your own activity; the only changes you can make are to the extras 3084 * inside of it. 3085 * 3086 * @return Returns a boolean indicating whether there was another Activity 3087 * to start: true if there was a next activity to start, false if there 3088 * wasn't. In general, if true is returned you will then want to call 3089 * finish() on yourself. 3090 */ 3091 public boolean startNextMatchingActivity(Intent intent) { 3092 if (mParent == null) { 3093 try { 3094 return ActivityManagerNative.getDefault() 3095 .startNextMatchingActivity(mToken, intent); 3096 } catch (RemoteException e) { 3097 // Empty 3098 } 3099 return false; 3100 } 3101 3102 throw new UnsupportedOperationException( 3103 "startNextMatchingActivity can only be called from a top-level activity"); 3104 } 3105 3106 /** 3107 * This is called when a child activity of this one calls its 3108 * {@link #startActivity} or {@link #startActivityForResult} method. 3109 * 3110 * <p>This method throws {@link android.content.ActivityNotFoundException} 3111 * if there was no Activity found to run the given Intent. 3112 * 3113 * @param child The activity making the call. 3114 * @param intent The intent to start. 3115 * @param requestCode Reply request code. < 0 if reply is not requested. 3116 * 3117 * @throws android.content.ActivityNotFoundException 3118 * 3119 * @see #startActivity 3120 * @see #startActivityForResult 3121 */ 3122 public void startActivityFromChild(Activity child, Intent intent, 3123 int requestCode) { 3124 Instrumentation.ActivityResult ar = 3125 mInstrumentation.execStartActivity( 3126 this, mMainThread.getApplicationThread(), mToken, child, 3127 intent, requestCode); 3128 if (ar != null) { 3129 mMainThread.sendActivityResult( 3130 mToken, child.mEmbeddedID, requestCode, 3131 ar.getResultCode(), ar.getResultData()); 3132 } 3133 } 3134 3135 /** 3136 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3137 * taking a IntentSender; see 3138 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3139 * for more information. 3140 */ 3141 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3142 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3143 int extraFlags) 3144 throws IntentSender.SendIntentException { 3145 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3146 flagsMask, flagsValues, child); 3147 } 3148 3149 /** 3150 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3151 * or {@link #finish} to specify an explicit transition animation to 3152 * perform next. 3153 * @param enterAnim A resource ID of the animation resource to use for 3154 * the incoming activity. Use 0 for no animation. 3155 * @param exitAnim A resource ID of the animation resource to use for 3156 * the outgoing activity. Use 0 for no animation. 3157 */ 3158 public void overridePendingTransition(int enterAnim, int exitAnim) { 3159 try { 3160 ActivityManagerNative.getDefault().overridePendingTransition( 3161 mToken, getPackageName(), enterAnim, exitAnim); 3162 } catch (RemoteException e) { 3163 } 3164 } 3165 3166 /** 3167 * Call this to set the result that your activity will return to its 3168 * caller. 3169 * 3170 * @param resultCode The result code to propagate back to the originating 3171 * activity, often RESULT_CANCELED or RESULT_OK 3172 * 3173 * @see #RESULT_CANCELED 3174 * @see #RESULT_OK 3175 * @see #RESULT_FIRST_USER 3176 * @see #setResult(int, Intent) 3177 */ 3178 public final void setResult(int resultCode) { 3179 synchronized (this) { 3180 mResultCode = resultCode; 3181 mResultData = null; 3182 } 3183 } 3184 3185 /** 3186 * Call this to set the result that your activity will return to its 3187 * caller. 3188 * 3189 * @param resultCode The result code to propagate back to the originating 3190 * activity, often RESULT_CANCELED or RESULT_OK 3191 * @param data The data to propagate back to the originating activity. 3192 * 3193 * @see #RESULT_CANCELED 3194 * @see #RESULT_OK 3195 * @see #RESULT_FIRST_USER 3196 * @see #setResult(int) 3197 */ 3198 public final void setResult(int resultCode, Intent data) { 3199 synchronized (this) { 3200 mResultCode = resultCode; 3201 mResultData = data; 3202 } 3203 } 3204 3205 /** 3206 * Return the name of the package that invoked this activity. This is who 3207 * the data in {@link #setResult setResult()} will be sent to. You can 3208 * use this information to validate that the recipient is allowed to 3209 * receive the data. 3210 * 3211 * <p>Note: if the calling activity is not expecting a result (that is it 3212 * did not use the {@link #startActivityForResult} 3213 * form that includes a request code), then the calling package will be 3214 * null. 3215 * 3216 * @return The package of the activity that will receive your 3217 * reply, or null if none. 3218 */ 3219 public String getCallingPackage() { 3220 try { 3221 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 3222 } catch (RemoteException e) { 3223 return null; 3224 } 3225 } 3226 3227 /** 3228 * Return the name of the activity that invoked this activity. This is 3229 * who the data in {@link #setResult setResult()} will be sent to. You 3230 * can use this information to validate that the recipient is allowed to 3231 * receive the data. 3232 * 3233 * <p>Note: if the calling activity is not expecting a result (that is it 3234 * did not use the {@link #startActivityForResult} 3235 * form that includes a request code), then the calling package will be 3236 * null. 3237 * 3238 * @return String The full name of the activity that will receive your 3239 * reply, or null if none. 3240 */ 3241 public ComponentName getCallingActivity() { 3242 try { 3243 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 3244 } catch (RemoteException e) { 3245 return null; 3246 } 3247 } 3248 3249 /** 3250 * Control whether this activity's main window is visible. This is intended 3251 * only for the special case of an activity that is not going to show a 3252 * UI itself, but can't just finish prior to onResume() because it needs 3253 * to wait for a service binding or such. Setting this to false allows 3254 * you to prevent your UI from being shown during that time. 3255 * 3256 * <p>The default value for this is taken from the 3257 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 3258 */ 3259 public void setVisible(boolean visible) { 3260 if (mVisibleFromClient != visible) { 3261 mVisibleFromClient = visible; 3262 if (mVisibleFromServer) { 3263 if (visible) makeVisible(); 3264 else mDecor.setVisibility(View.INVISIBLE); 3265 } 3266 } 3267 } 3268 3269 void makeVisible() { 3270 if (!mWindowAdded) { 3271 ViewManager wm = getWindowManager(); 3272 wm.addView(mDecor, getWindow().getAttributes()); 3273 mWindowAdded = true; 3274 } 3275 mDecor.setVisibility(View.VISIBLE); 3276 } 3277 3278 /** 3279 * Check to see whether this activity is in the process of finishing, 3280 * either because you called {@link #finish} on it or someone else 3281 * has requested that it finished. This is often used in 3282 * {@link #onPause} to determine whether the activity is simply pausing or 3283 * completely finishing. 3284 * 3285 * @return If the activity is finishing, returns true; else returns false. 3286 * 3287 * @see #finish 3288 */ 3289 public boolean isFinishing() { 3290 return mFinished; 3291 } 3292 3293 /** 3294 * Call this when your activity is done and should be closed. The 3295 * ActivityResult is propagated back to whoever launched you via 3296 * onActivityResult(). 3297 */ 3298 public void finish() { 3299 if (mParent == null) { 3300 int resultCode; 3301 Intent resultData; 3302 synchronized (this) { 3303 resultCode = mResultCode; 3304 resultData = mResultData; 3305 } 3306 if (Config.LOGV) Log.v(TAG, "Finishing self: token=" + mToken); 3307 try { 3308 if (ActivityManagerNative.getDefault() 3309 .finishActivity(mToken, resultCode, resultData)) { 3310 mFinished = true; 3311 } 3312 } catch (RemoteException e) { 3313 // Empty 3314 } 3315 } else { 3316 mParent.finishFromChild(this); 3317 } 3318 } 3319 3320 /** 3321 * This is called when a child activity of this one calls its 3322 * {@link #finish} method. The default implementation simply calls 3323 * finish() on this activity (the parent), finishing the entire group. 3324 * 3325 * @param child The activity making the call. 3326 * 3327 * @see #finish 3328 */ 3329 public void finishFromChild(Activity child) { 3330 finish(); 3331 } 3332 3333 /** 3334 * Force finish another activity that you had previously started with 3335 * {@link #startActivityForResult}. 3336 * 3337 * @param requestCode The request code of the activity that you had 3338 * given to startActivityForResult(). If there are multiple 3339 * activities started with this request code, they 3340 * will all be finished. 3341 */ 3342 public void finishActivity(int requestCode) { 3343 if (mParent == null) { 3344 try { 3345 ActivityManagerNative.getDefault() 3346 .finishSubActivity(mToken, mEmbeddedID, requestCode); 3347 } catch (RemoteException e) { 3348 // Empty 3349 } 3350 } else { 3351 mParent.finishActivityFromChild(this, requestCode); 3352 } 3353 } 3354 3355 /** 3356 * This is called when a child activity of this one calls its 3357 * finishActivity(). 3358 * 3359 * @param child The activity making the call. 3360 * @param requestCode Request code that had been used to start the 3361 * activity. 3362 */ 3363 public void finishActivityFromChild(Activity child, int requestCode) { 3364 try { 3365 ActivityManagerNative.getDefault() 3366 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 3367 } catch (RemoteException e) { 3368 // Empty 3369 } 3370 } 3371 3372 /** 3373 * Called when an activity you launched exits, giving you the requestCode 3374 * you started it with, the resultCode it returned, and any additional 3375 * data from it. The <var>resultCode</var> will be 3376 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 3377 * didn't return any result, or crashed during its operation. 3378 * 3379 * <p>You will receive this call immediately before onResume() when your 3380 * activity is re-starting. 3381 * 3382 * @param requestCode The integer request code originally supplied to 3383 * startActivityForResult(), allowing you to identify who this 3384 * result came from. 3385 * @param resultCode The integer result code returned by the child activity 3386 * through its setResult(). 3387 * @param data An Intent, which can return result data to the caller 3388 * (various data can be attached to Intent "extras"). 3389 * 3390 * @see #startActivityForResult 3391 * @see #createPendingResult 3392 * @see #setResult(int) 3393 */ 3394 protected void onActivityResult(int requestCode, int resultCode, 3395 Intent data) { 3396 } 3397 3398 /** 3399 * Create a new PendingIntent object which you can hand to others 3400 * for them to use to send result data back to your 3401 * {@link #onActivityResult} callback. The created object will be either 3402 * one-shot (becoming invalid after a result is sent back) or multiple 3403 * (allowing any number of results to be sent through it). 3404 * 3405 * @param requestCode Private request code for the sender that will be 3406 * associated with the result data when it is returned. The sender can not 3407 * modify this value, allowing you to identify incoming results. 3408 * @param data Default data to supply in the result, which may be modified 3409 * by the sender. 3410 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 3411 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 3412 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 3413 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 3414 * or any of the flags as supported by 3415 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 3416 * of the intent that can be supplied when the actual send happens. 3417 * 3418 * @return Returns an existing or new PendingIntent matching the given 3419 * parameters. May return null only if 3420 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 3421 * supplied. 3422 * 3423 * @see PendingIntent 3424 */ 3425 public PendingIntent createPendingResult(int requestCode, Intent data, 3426 int flags) { 3427 String packageName = getPackageName(); 3428 try { 3429 IIntentSender target = 3430 ActivityManagerNative.getDefault().getIntentSender( 3431 IActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 3432 mParent == null ? mToken : mParent.mToken, 3433 mEmbeddedID, requestCode, data, null, flags); 3434 return target != null ? new PendingIntent(target) : null; 3435 } catch (RemoteException e) { 3436 // Empty 3437 } 3438 return null; 3439 } 3440 3441 /** 3442 * Change the desired orientation of this activity. If the activity 3443 * is currently in the foreground or otherwise impacting the screen 3444 * orientation, the screen will immediately be changed (possibly causing 3445 * the activity to be restarted). Otherwise, this will be used the next 3446 * time the activity is visible. 3447 * 3448 * @param requestedOrientation An orientation constant as used in 3449 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3450 */ 3451 public void setRequestedOrientation(int requestedOrientation) { 3452 if (mParent == null) { 3453 try { 3454 ActivityManagerNative.getDefault().setRequestedOrientation( 3455 mToken, requestedOrientation); 3456 } catch (RemoteException e) { 3457 // Empty 3458 } 3459 } else { 3460 mParent.setRequestedOrientation(requestedOrientation); 3461 } 3462 } 3463 3464 /** 3465 * Return the current requested orientation of the activity. This will 3466 * either be the orientation requested in its component's manifest, or 3467 * the last requested orientation given to 3468 * {@link #setRequestedOrientation(int)}. 3469 * 3470 * @return Returns an orientation constant as used in 3471 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3472 */ 3473 public int getRequestedOrientation() { 3474 if (mParent == null) { 3475 try { 3476 return ActivityManagerNative.getDefault() 3477 .getRequestedOrientation(mToken); 3478 } catch (RemoteException e) { 3479 // Empty 3480 } 3481 } else { 3482 return mParent.getRequestedOrientation(); 3483 } 3484 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 3485 } 3486 3487 /** 3488 * Return the identifier of the task this activity is in. This identifier 3489 * will remain the same for the lifetime of the activity. 3490 * 3491 * @return Task identifier, an opaque integer. 3492 */ 3493 public int getTaskId() { 3494 try { 3495 return ActivityManagerNative.getDefault() 3496 .getTaskForActivity(mToken, false); 3497 } catch (RemoteException e) { 3498 return -1; 3499 } 3500 } 3501 3502 /** 3503 * Return whether this activity is the root of a task. The root is the 3504 * first activity in a task. 3505 * 3506 * @return True if this is the root activity, else false. 3507 */ 3508 public boolean isTaskRoot() { 3509 try { 3510 return ActivityManagerNative.getDefault() 3511 .getTaskForActivity(mToken, true) >= 0; 3512 } catch (RemoteException e) { 3513 return false; 3514 } 3515 } 3516 3517 /** 3518 * Move the task containing this activity to the back of the activity 3519 * stack. The activity's order within the task is unchanged. 3520 * 3521 * @param nonRoot If false then this only works if the activity is the root 3522 * of a task; if true it will work for any activity in 3523 * a task. 3524 * 3525 * @return If the task was moved (or it was already at the 3526 * back) true is returned, else false. 3527 */ 3528 public boolean moveTaskToBack(boolean nonRoot) { 3529 try { 3530 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 3531 mToken, nonRoot); 3532 } catch (RemoteException e) { 3533 // Empty 3534 } 3535 return false; 3536 } 3537 3538 /** 3539 * Returns class name for this activity with the package prefix removed. 3540 * This is the default name used to read and write settings. 3541 * 3542 * @return The local class name. 3543 */ 3544 public String getLocalClassName() { 3545 final String pkg = getPackageName(); 3546 final String cls = mComponent.getClassName(); 3547 int packageLen = pkg.length(); 3548 if (!cls.startsWith(pkg) || cls.length() <= packageLen 3549 || cls.charAt(packageLen) != '.') { 3550 return cls; 3551 } 3552 return cls.substring(packageLen+1); 3553 } 3554 3555 /** 3556 * Returns complete component name of this activity. 3557 * 3558 * @return Returns the complete component name for this activity 3559 */ 3560 public ComponentName getComponentName() 3561 { 3562 return mComponent; 3563 } 3564 3565 /** 3566 * Retrieve a {@link SharedPreferences} object for accessing preferences 3567 * that are private to this activity. This simply calls the underlying 3568 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 3569 * class name as the preferences name. 3570 * 3571 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 3572 * operation, {@link #MODE_WORLD_READABLE} and 3573 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 3574 * 3575 * @return Returns the single SharedPreferences instance that can be used 3576 * to retrieve and modify the preference values. 3577 */ 3578 public SharedPreferences getPreferences(int mode) { 3579 return getSharedPreferences(getLocalClassName(), mode); 3580 } 3581 3582 private void ensureSearchManager() { 3583 if (mSearchManager != null) { 3584 return; 3585 } 3586 3587 mSearchManager = new SearchManager(this, null); 3588 } 3589 3590 @Override 3591 public Object getSystemService(String name) { 3592 if (getBaseContext() == null) { 3593 throw new IllegalStateException( 3594 "System services not available to Activities before onCreate()"); 3595 } 3596 3597 if (WINDOW_SERVICE.equals(name)) { 3598 return mWindowManager; 3599 } else if (SEARCH_SERVICE.equals(name)) { 3600 ensureSearchManager(); 3601 return mSearchManager; 3602 } 3603 return super.getSystemService(name); 3604 } 3605 3606 /** 3607 * Change the title associated with this activity. If this is a 3608 * top-level activity, the title for its window will change. If it 3609 * is an embedded activity, the parent can do whatever it wants 3610 * with it. 3611 */ 3612 public void setTitle(CharSequence title) { 3613 mTitle = title; 3614 onTitleChanged(title, mTitleColor); 3615 3616 if (mParent != null) { 3617 mParent.onChildTitleChanged(this, title); 3618 } 3619 } 3620 3621 /** 3622 * Change the title associated with this activity. If this is a 3623 * top-level activity, the title for its window will change. If it 3624 * is an embedded activity, the parent can do whatever it wants 3625 * with it. 3626 */ 3627 public void setTitle(int titleId) { 3628 setTitle(getText(titleId)); 3629 } 3630 3631 public void setTitleColor(int textColor) { 3632 mTitleColor = textColor; 3633 onTitleChanged(mTitle, textColor); 3634 } 3635 3636 public final CharSequence getTitle() { 3637 return mTitle; 3638 } 3639 3640 public final int getTitleColor() { 3641 return mTitleColor; 3642 } 3643 3644 protected void onTitleChanged(CharSequence title, int color) { 3645 if (mTitleReady) { 3646 final Window win = getWindow(); 3647 if (win != null) { 3648 win.setTitle(title); 3649 if (color != 0) { 3650 win.setTitleColor(color); 3651 } 3652 } 3653 } 3654 } 3655 3656 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 3657 } 3658 3659 /** 3660 * Sets the visibility of the progress bar in the title. 3661 * <p> 3662 * In order for the progress bar to be shown, the feature must be requested 3663 * via {@link #requestWindowFeature(int)}. 3664 * 3665 * @param visible Whether to show the progress bars in the title. 3666 */ 3667 public final void setProgressBarVisibility(boolean visible) { 3668 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 3669 Window.PROGRESS_VISIBILITY_OFF); 3670 } 3671 3672 /** 3673 * Sets the visibility of the indeterminate progress bar in the title. 3674 * <p> 3675 * In order for the progress bar to be shown, the feature must be requested 3676 * via {@link #requestWindowFeature(int)}. 3677 * 3678 * @param visible Whether to show the progress bars in the title. 3679 */ 3680 public final void setProgressBarIndeterminateVisibility(boolean visible) { 3681 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 3682 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 3683 } 3684 3685 /** 3686 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 3687 * is always indeterminate). 3688 * <p> 3689 * In order for the progress bar to be shown, the feature must be requested 3690 * via {@link #requestWindowFeature(int)}. 3691 * 3692 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 3693 */ 3694 public final void setProgressBarIndeterminate(boolean indeterminate) { 3695 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3696 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 3697 } 3698 3699 /** 3700 * Sets the progress for the progress bars in the title. 3701 * <p> 3702 * In order for the progress bar to be shown, the feature must be requested 3703 * via {@link #requestWindowFeature(int)}. 3704 * 3705 * @param progress The progress for the progress bar. Valid ranges are from 3706 * 0 to 10000 (both inclusive). If 10000 is given, the progress 3707 * bar will be completely filled and will fade out. 3708 */ 3709 public final void setProgress(int progress) { 3710 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 3711 } 3712 3713 /** 3714 * Sets the secondary progress for the progress bar in the title. This 3715 * progress is drawn between the primary progress (set via 3716 * {@link #setProgress(int)} and the background. It can be ideal for media 3717 * scenarios such as showing the buffering progress while the default 3718 * progress shows the play progress. 3719 * <p> 3720 * In order for the progress bar to be shown, the feature must be requested 3721 * via {@link #requestWindowFeature(int)}. 3722 * 3723 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 3724 * 0 to 10000 (both inclusive). 3725 */ 3726 public final void setSecondaryProgress(int secondaryProgress) { 3727 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3728 secondaryProgress + Window.PROGRESS_SECONDARY_START); 3729 } 3730 3731 /** 3732 * Suggests an audio stream whose volume should be changed by the hardware 3733 * volume controls. 3734 * <p> 3735 * The suggested audio stream will be tied to the window of this Activity. 3736 * If the Activity is switched, the stream set here is no longer the 3737 * suggested stream. The client does not need to save and restore the old 3738 * suggested stream value in onPause and onResume. 3739 * 3740 * @param streamType The type of the audio stream whose volume should be 3741 * changed by the hardware volume controls. It is not guaranteed that 3742 * the hardware volume controls will always change this stream's 3743 * volume (for example, if a call is in progress, its stream's volume 3744 * may be changed instead). To reset back to the default, use 3745 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 3746 */ 3747 public final void setVolumeControlStream(int streamType) { 3748 getWindow().setVolumeControlStream(streamType); 3749 } 3750 3751 /** 3752 * Gets the suggested audio stream whose volume should be changed by the 3753 * harwdare volume controls. 3754 * 3755 * @return The suggested audio stream type whose volume should be changed by 3756 * the hardware volume controls. 3757 * @see #setVolumeControlStream(int) 3758 */ 3759 public final int getVolumeControlStream() { 3760 return getWindow().getVolumeControlStream(); 3761 } 3762 3763 /** 3764 * Runs the specified action on the UI thread. If the current thread is the UI 3765 * thread, then the action is executed immediately. If the current thread is 3766 * not the UI thread, the action is posted to the event queue of the UI thread. 3767 * 3768 * @param action the action to run on the UI thread 3769 */ 3770 public final void runOnUiThread(Runnable action) { 3771 if (Thread.currentThread() != mUiThread) { 3772 mHandler.post(action); 3773 } else { 3774 action.run(); 3775 } 3776 } 3777 3778 /** 3779 * Stub implementation of {@link android.view.LayoutInflater.Factory#onCreateView} used when 3780 * inflating with the LayoutInflater returned by {@link #getSystemService}. This 3781 * implementation simply returns null for all view names. 3782 * 3783 * @see android.view.LayoutInflater#createView 3784 * @see android.view.Window#getLayoutInflater 3785 */ 3786 public View onCreateView(String name, Context context, AttributeSet attrs) { 3787 return null; 3788 } 3789 3790 // ------------------ Internal API ------------------ 3791 3792 final void setParent(Activity parent) { 3793 mParent = parent; 3794 } 3795 3796 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 3797 Application application, Intent intent, ActivityInfo info, CharSequence title, 3798 Activity parent, String id, Object lastNonConfigurationInstance, 3799 Configuration config) { 3800 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 3801 lastNonConfigurationInstance, null, config); 3802 } 3803 3804 final void attach(Context context, ActivityThread aThread, 3805 Instrumentation instr, IBinder token, int ident, 3806 Application application, Intent intent, ActivityInfo info, 3807 CharSequence title, Activity parent, String id, 3808 Object lastNonConfigurationInstance, 3809 HashMap<String,Object> lastNonConfigurationChildInstances, 3810 Configuration config) { 3811 attachBaseContext(context); 3812 3813 mFragments.attachActivity(this); 3814 3815 mWindow = PolicyManager.makeNewWindow(this); 3816 mWindow.setCallback(this); 3817 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 3818 mWindow.setSoftInputMode(info.softInputMode); 3819 } 3820 mUiThread = Thread.currentThread(); 3821 3822 mMainThread = aThread; 3823 mInstrumentation = instr; 3824 mToken = token; 3825 mIdent = ident; 3826 mApplication = application; 3827 mIntent = intent; 3828 mComponent = intent.getComponent(); 3829 mActivityInfo = info; 3830 mTitle = title; 3831 mParent = parent; 3832 mEmbeddedID = id; 3833 mLastNonConfigurationInstance = lastNonConfigurationInstance; 3834 mLastNonConfigurationChildInstances = lastNonConfigurationChildInstances; 3835 3836 mWindow.setWindowManager(null, mToken, mComponent.flattenToString()); 3837 if (mParent != null) { 3838 mWindow.setContainer(mParent.getWindow()); 3839 } 3840 mWindowManager = mWindow.getWindowManager(); 3841 mCurrentConfig = config; 3842 } 3843 3844 final IBinder getActivityToken() { 3845 return mParent != null ? mParent.getActivityToken() : mToken; 3846 } 3847 3848 final void performCreate(Bundle icicle) { 3849 onCreate(icicle); 3850 mFragments.dispatchCreate(icicle); 3851 } 3852 3853 final void performStart() { 3854 mCalled = false; 3855 mInstrumentation.callActivityOnStart(this); 3856 if (!mCalled) { 3857 throw new SuperNotCalledException( 3858 "Activity " + mComponent.toShortString() + 3859 " did not call through to super.onStart()"); 3860 } 3861 mFragments.dispatchStart(); 3862 } 3863 3864 final void performRestart() { 3865 synchronized (mManagedCursors) { 3866 final int N = mManagedCursors.size(); 3867 for (int i=0; i<N; i++) { 3868 ManagedCursor mc = mManagedCursors.get(i); 3869 if (mc.mReleased || mc.mUpdated) { 3870 mc.mCursor.requery(); 3871 mc.mReleased = false; 3872 mc.mUpdated = false; 3873 } 3874 } 3875 } 3876 3877 if (mStopped) { 3878 mStopped = false; 3879 mCalled = false; 3880 mInstrumentation.callActivityOnRestart(this); 3881 if (!mCalled) { 3882 throw new SuperNotCalledException( 3883 "Activity " + mComponent.toShortString() + 3884 " did not call through to super.onRestart()"); 3885 } 3886 performStart(); 3887 } 3888 } 3889 3890 final void performResume() { 3891 performRestart(); 3892 3893 mLastNonConfigurationInstance = null; 3894 3895 // First call onResume() -before- setting mResumed, so we don't 3896 // send out any status bar / menu notifications the client makes. 3897 mCalled = false; 3898 mInstrumentation.callActivityOnResume(this); 3899 if (!mCalled) { 3900 throw new SuperNotCalledException( 3901 "Activity " + mComponent.toShortString() + 3902 " did not call through to super.onResume()"); 3903 } 3904 3905 // Now really resume, and install the current status bar and menu. 3906 mResumed = true; 3907 mCalled = false; 3908 3909 mFragments.dispatchResume(); 3910 3911 onPostResume(); 3912 if (!mCalled) { 3913 throw new SuperNotCalledException( 3914 "Activity " + mComponent.toShortString() + 3915 " did not call through to super.onPostResume()"); 3916 } 3917 } 3918 3919 final void performPause() { 3920 mFragments.dispatchPause(); 3921 onPause(); 3922 } 3923 3924 final void performUserLeaving() { 3925 onUserInteraction(); 3926 onUserLeaveHint(); 3927 } 3928 3929 final void performStop() { 3930 if (!mStopped) { 3931 if (mWindow != null) { 3932 mWindow.closeAllPanels(); 3933 } 3934 3935 mFragments.dispatchStop(); 3936 3937 mCalled = false; 3938 mInstrumentation.callActivityOnStop(this); 3939 if (!mCalled) { 3940 throw new SuperNotCalledException( 3941 "Activity " + mComponent.toShortString() + 3942 " did not call through to super.onStop()"); 3943 } 3944 3945 synchronized (mManagedCursors) { 3946 final int N = mManagedCursors.size(); 3947 for (int i=0; i<N; i++) { 3948 ManagedCursor mc = mManagedCursors.get(i); 3949 if (!mc.mReleased) { 3950 mc.mCursor.deactivate(); 3951 mc.mReleased = true; 3952 } 3953 } 3954 } 3955 3956 mStopped = true; 3957 } 3958 mResumed = false; 3959 } 3960 3961 final void performDestroy() { 3962 mFragments.dispatchDestroy(); 3963 onDestroy(); 3964 } 3965 3966 final boolean isResumed() { 3967 return mResumed; 3968 } 3969 3970 void dispatchActivityResult(String who, int requestCode, 3971 int resultCode, Intent data) { 3972 if (Config.LOGV) Log.v( 3973 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 3974 + ", resCode=" + resultCode + ", data=" + data); 3975 if (who == null) { 3976 onActivityResult(requestCode, resultCode, data); 3977 } 3978 } 3979} 3980