Activity.java revision 3c80a4a044865bdf1289c7896baffa1c082d835c
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.RemoteException; 43import android.text.Selection; 44import android.text.SpannableStringBuilder; 45import android.text.TextUtils; 46import android.text.method.TextKeyListener; 47import android.util.AttributeSet; 48import android.util.Config; 49import android.util.EventLog; 50import android.util.Log; 51import android.util.SparseArray; 52import android.view.ContextMenu; 53import android.view.ContextThemeWrapper; 54import android.view.KeyEvent; 55import android.view.LayoutInflater; 56import android.view.Menu; 57import android.view.MenuInflater; 58import android.view.MenuItem; 59import android.view.MotionEvent; 60import android.view.View; 61import android.view.ViewGroup; 62import android.view.ViewManager; 63import android.view.Window; 64import android.view.WindowManager; 65import android.view.ContextMenu.ContextMenuInfo; 66import android.view.View.OnCreateContextMenuListener; 67import android.view.ViewGroup.LayoutParams; 68import android.view.accessibility.AccessibilityEvent; 69import android.widget.AdapterView; 70 71import java.util.ArrayList; 72import java.util.HashMap; 73 74/** 75 * An activity is a single, focused thing that the user can do. Almost all 76 * activities interact with the user, so the Activity class takes care of 77 * creating a window for you in which you can place your UI with 78 * {@link #setContentView}. While activities are often presented to the user 79 * as full-screen windows, they can also be used in other ways: as floating 80 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 81 * or embedded inside of another activity (using {@link ActivityGroup}). 82 * 83 * There are two methods almost all subclasses of Activity will implement: 84 * 85 * <ul> 86 * <li> {@link #onCreate} is where you initialize your activity. Most 87 * importantly, here you will usually call {@link #setContentView(int)} 88 * with a layout resource defining your UI, and using {@link #findViewById} 89 * to retrieve the widgets in that UI that you need to interact with 90 * programmatically. 91 * 92 * <li> {@link #onPause} is where you deal with the user leaving your 93 * activity. Most importantly, any changes made by the user should at this 94 * point be committed (usually to the 95 * {@link android.content.ContentProvider} holding the data). 96 * </ul> 97 * 98 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 99 * activity classes must have a corresponding 100 * {@link android.R.styleable#AndroidManifestActivity <activity>} 101 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 102 * 103 * <p>The Activity class is an important part of an application's overall lifecycle, 104 * and the way activities are launched and put together is a fundamental 105 * part of the platform's application model. For a detailed perspective on the structure of 106 * Android applications and lifecycles, please read the <em>Dev Guide</em> document on 107 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a>.</p> 108 * 109 * <p>Topics covered here: 110 * <ol> 111 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 112 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 113 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 114 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 115 * <li><a href="#Permissions">Permissions</a> 116 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 117 * </ol> 118 * 119 * <a name="ActivityLifecycle"></a> 120 * <h3>Activity Lifecycle</h3> 121 * 122 * <p>Activities in the system are managed as an <em>activity stack</em>. 123 * When a new activity is started, it is placed on the top of the stack 124 * and becomes the running activity -- the previous activity always remains 125 * below it in the stack, and will not come to the foreground again until 126 * the new activity exits.</p> 127 * 128 * <p>An activity has essentially four states:</p> 129 * <ul> 130 * <li> If an activity in the foreground of the screen (at the top of 131 * the stack), 132 * it is <em>active</em> or <em>running</em>. </li> 133 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 134 * or transparent activity has focus on top of your activity), it 135 * is <em>paused</em>. A paused activity is completely alive (it 136 * maintains all state and member information and remains attached to 137 * the window manager), but can be killed by the system in extreme 138 * low memory situations. 139 * <li>If an activity is completely obscured by another activity, 140 * it is <em>stopped</em>. It still retains all state and member information, 141 * however, it is no longer visible to the user so its window is hidden 142 * and it will often be killed by the system when memory is needed 143 * elsewhere.</li> 144 * <li>If an activity is paused or stopped, the system can drop the activity 145 * from memory by either asking it to finish, or simply killing its 146 * process. When it is displayed again to the user, it must be 147 * completely restarted and restored to its previous state.</li> 148 * </ul> 149 * 150 * <p>The following diagram shows the important state paths of an Activity. 151 * The square rectangles represent callback methods you can implement to 152 * perform operations when the Activity moves between states. The colored 153 * ovals are major states the Activity can be in.</p> 154 * 155 * <p><img src="../../../images/activity_lifecycle.png" 156 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 157 * 158 * <p>There are three key loops you may be interested in monitoring within your 159 * activity: 160 * 161 * <ul> 162 * <li>The <b>entire lifetime</b> of an activity happens between the first call 163 * to {@link android.app.Activity#onCreate} through to a single final call 164 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 165 * of "global" state in onCreate(), and release all remaining resources in 166 * onDestroy(). For example, if it has a thread running in the background 167 * to download data from the network, it may create that thread in onCreate() 168 * and then stop the thread in onDestroy(). 169 * 170 * <li>The <b>visible lifetime</b> of an activity happens between a call to 171 * {@link android.app.Activity#onStart} until a corresponding call to 172 * {@link android.app.Activity#onStop}. During this time the user can see the 173 * activity on-screen, though it may not be in the foreground and interacting 174 * with the user. Between these two methods you can maintain resources that 175 * are needed to show the activity to the user. For example, you can register 176 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 177 * that impact your UI, and unregister it in onStop() when the user an no 178 * longer see what you are displaying. The onStart() and onStop() methods 179 * can be called multiple times, as the activity becomes visible and hidden 180 * to the user. 181 * 182 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 183 * {@link android.app.Activity#onResume} until a corresponding call to 184 * {@link android.app.Activity#onPause}. During this time the activity is 185 * in front of all other activities and interacting with the user. An activity 186 * can frequently go between the resumed and paused states -- for example when 187 * the device goes to sleep, when an activity result is delivered, when a new 188 * intent is delivered -- so the code in these methods should be fairly 189 * lightweight. 190 * </ul> 191 * 192 * <p>The entire lifecycle of an activity is defined by the following 193 * Activity methods. All of these are hooks that you can override 194 * to do appropriate work when the activity changes state. All 195 * activities will implement {@link android.app.Activity#onCreate} 196 * to do their initial setup; many will also implement 197 * {@link android.app.Activity#onPause} to commit changes to data and 198 * otherwise prepare to stop interacting with the user. You should always 199 * call up to your superclass when implementing these methods.</p> 200 * 201 * </p> 202 * <pre class="prettyprint"> 203 * public class Activity extends ApplicationContext { 204 * protected void onCreate(Bundle savedInstanceState); 205 * 206 * protected void onStart(); 207 * 208 * protected void onRestart(); 209 * 210 * protected void onResume(); 211 * 212 * protected void onPause(); 213 * 214 * protected void onStop(); 215 * 216 * protected void onDestroy(); 217 * } 218 * </pre> 219 * 220 * <p>In general the movement through an activity's lifecycle looks like 221 * this:</p> 222 * 223 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 224 * <colgroup align="left" span="3" /> 225 * <colgroup align="left" /> 226 * <colgroup align="center" /> 227 * <colgroup align="center" /> 228 * 229 * <thead> 230 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 231 * </thead> 232 * 233 * <tbody> 234 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 235 * <td>Called when the activity is first created. 236 * This is where you should do all of your normal static set up: 237 * create views, bind data to lists, etc. This method also 238 * provides you with a Bundle containing the activity's previously 239 * frozen state, if there was one. 240 * <p>Always followed by <code>onStart()</code>.</td> 241 * <td align="center">No</td> 242 * <td align="center"><code>onStart()</code></td> 243 * </tr> 244 * 245 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 246 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 247 * <td>Called after your activity has been stopped, prior to it being 248 * started again. 249 * <p>Always followed by <code>onStart()</code></td> 250 * <td align="center">No</td> 251 * <td align="center"><code>onStart()</code></td> 252 * </tr> 253 * 254 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 255 * <td>Called when the activity is becoming visible to the user. 256 * <p>Followed by <code>onResume()</code> if the activity comes 257 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 258 * <td align="center">No</td> 259 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 260 * </tr> 261 * 262 * <tr><td rowspan="2" style="border-left: none;"> </td> 263 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 264 * <td>Called when the activity will start 265 * interacting with the user. At this point your activity is at 266 * the top of the activity stack, with user input going to it. 267 * <p>Always followed by <code>onPause()</code>.</td> 268 * <td align="center">No</td> 269 * <td align="center"><code>onPause()</code></td> 270 * </tr> 271 * 272 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 273 * <td>Called when the system is about to start resuming a previous 274 * activity. This is typically used to commit unsaved changes to 275 * persistent data, stop animations and other things that may be consuming 276 * CPU, etc. Implementations of this method must be very quick because 277 * the next activity will not be resumed until this method returns. 278 * <p>Followed by either <code>onResume()</code> if the activity 279 * returns back to the front, or <code>onStop()</code> if it becomes 280 * invisible to the user.</td> 281 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 282 * <td align="center"><code>onResume()</code> or<br> 283 * <code>onStop()</code></td> 284 * </tr> 285 * 286 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 287 * <td>Called when the activity is no longer visible to the user, because 288 * another activity has been resumed and is covering this one. This 289 * may happen either because a new activity is being started, an existing 290 * one is being brought in front of this one, or this one is being 291 * destroyed. 292 * <p>Followed by either <code>onRestart()</code> if 293 * this activity is coming back to interact with the user, or 294 * <code>onDestroy()</code> if this activity is going away.</td> 295 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 296 * <td align="center"><code>onRestart()</code> or<br> 297 * <code>onDestroy()</code></td> 298 * </tr> 299 * 300 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 301 * <td>The final call you receive before your 302 * activity is destroyed. This can happen either because the 303 * activity is finishing (someone called {@link Activity#finish} on 304 * it, or because the system is temporarily destroying this 305 * instance of the activity to save space. You can distinguish 306 * between these two scenarios with the {@link 307 * Activity#isFinishing} method.</td> 308 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 309 * <td align="center"><em>nothing</em></td> 310 * </tr> 311 * </tbody> 312 * </table> 313 * 314 * <p>Note the "Killable" column in the above table -- for those methods that 315 * are marked as being killable, after that method returns the process hosting the 316 * activity may killed by the system <em>at any time</em> without another line 317 * of its code being executed. Because of this, you should use the 318 * {@link #onPause} method to write any persistent data (such as user edits) 319 * to storage. In addition, the method 320 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 321 * in such a background state, allowing you to save away any dynamic instance 322 * state in your activity into the given Bundle, to be later received in 323 * {@link #onCreate} if the activity needs to be re-created. 324 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 325 * section for more information on how the lifecycle of a process is tied 326 * to the activities it is hosting. Note that it is important to save 327 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 328 * because the later is not part of the lifecycle callbacks, so will not 329 * be called in every situation as described in its documentation.</p> 330 * 331 * <p>For those methods that are not marked as being killable, the activity's 332 * process will not be killed by the system starting from the time the method 333 * is called and continuing after it returns. Thus an activity is in the killable 334 * state, for example, between after <code>onPause()</code> to the start of 335 * <code>onResume()</code>.</p> 336 * 337 * <a name="ConfigurationChanges"></a> 338 * <h3>Configuration Changes</h3> 339 * 340 * <p>If the configuration of the device (as defined by the 341 * {@link Configuration Resources.Configuration} class) changes, 342 * then anything displaying a user interface will need to update to match that 343 * configuration. Because Activity is the primary mechanism for interacting 344 * with the user, it includes special support for handling configuration 345 * changes.</p> 346 * 347 * <p>Unless you specify otherwise, a configuration change (such as a change 348 * in screen orientation, language, input devices, etc) will cause your 349 * current activity to be <em>destroyed</em>, going through the normal activity 350 * lifecycle process of {@link #onPause}, 351 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 352 * had been in the foreground or visible to the user, once {@link #onDestroy} is 353 * called in that instance then a new instance of the activity will be 354 * created, with whatever savedInstanceState the previous instance had generated 355 * from {@link #onSaveInstanceState}.</p> 356 * 357 * <p>This is done because any application resource, 358 * including layout files, can change based on any configuration value. Thus 359 * the only safe way to handle a configuration change is to re-retrieve all 360 * resources, including layouts, drawables, and strings. Because activities 361 * must already know how to save their state and re-create themselves from 362 * that state, this is a convenient way to have an activity restart itself 363 * with a new configuration.</p> 364 * 365 * <p>In some special cases, you may want to bypass restarting of your 366 * activity based on one or more types of configuration changes. This is 367 * done with the {@link android.R.attr#configChanges android:configChanges} 368 * attribute in its manifest. For any types of configuration changes you say 369 * that you handle there, you will receive a call to your current activity's 370 * {@link #onConfigurationChanged} method instead of being restarted. If 371 * a configuration change involves any that you do not handle, however, the 372 * activity will still be restarted and {@link #onConfigurationChanged} 373 * will not be called.</p> 374 * 375 * <a name="StartingActivities"></a> 376 * <h3>Starting Activities and Getting Results</h3> 377 * 378 * <p>The {@link android.app.Activity#startActivity} 379 * method is used to start a 380 * new activity, which will be placed at the top of the activity stack. It 381 * takes a single argument, an {@link android.content.Intent Intent}, 382 * which describes the activity 383 * to be executed.</p> 384 * 385 * <p>Sometimes you want to get a result back from an activity when it 386 * ends. For example, you may start an activity that lets the user pick 387 * a person in a list of contacts; when it ends, it returns the person 388 * that was selected. To do this, you call the 389 * {@link android.app.Activity#startActivityForResult(Intent, int)} 390 * version with a second integer parameter identifying the call. The result 391 * will come back through your {@link android.app.Activity#onActivityResult} 392 * method.</p> 393 * 394 * <p>When an activity exits, it can call 395 * {@link android.app.Activity#setResult(int)} 396 * to return data back to its parent. It must always supply a result code, 397 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 398 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 399 * return back an Intent containing any additional data it wants. All of this 400 * information appears back on the 401 * parent's <code>Activity.onActivityResult()</code>, along with the integer 402 * identifier it originally supplied.</p> 403 * 404 * <p>If a child activity fails for any reason (such as crashing), the parent 405 * activity will receive a result with the code RESULT_CANCELED.</p> 406 * 407 * <pre class="prettyprint"> 408 * public class MyActivity extends Activity { 409 * ... 410 * 411 * static final int PICK_CONTACT_REQUEST = 0; 412 * 413 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 414 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 415 * // When the user center presses, let them pick a contact. 416 * startActivityForResult( 417 * new Intent(Intent.ACTION_PICK, 418 * new Uri("content://contacts")), 419 * PICK_CONTACT_REQUEST); 420 * return true; 421 * } 422 * return false; 423 * } 424 * 425 * protected void onActivityResult(int requestCode, int resultCode, 426 * Intent data) { 427 * if (requestCode == PICK_CONTACT_REQUEST) { 428 * if (resultCode == RESULT_OK) { 429 * // A contact was picked. Here we will just display it 430 * // to the user. 431 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 432 * } 433 * } 434 * } 435 * } 436 * </pre> 437 * 438 * <a name="SavingPersistentState"></a> 439 * <h3>Saving Persistent State</h3> 440 * 441 * <p>There are generally two kinds of persistent state than an activity 442 * will deal with: shared document-like data (typically stored in a SQLite 443 * database using a {@linkplain android.content.ContentProvider content provider}) 444 * and internal state such as user preferences.</p> 445 * 446 * <p>For content provider data, we suggest that activities use a 447 * "edit in place" user model. That is, any edits a user makes are effectively 448 * made immediately without requiring an additional confirmation step. 449 * Supporting this model is generally a simple matter of following two rules:</p> 450 * 451 * <ul> 452 * <li> <p>When creating a new document, the backing database entry or file for 453 * it is created immediately. For example, if the user chooses to write 454 * a new e-mail, a new entry for that e-mail is created as soon as they 455 * start entering data, so that if they go to any other activity after 456 * that point this e-mail will now appear in the list of drafts.</p> 457 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 458 * commit to the backing content provider or file any changes the user 459 * has made. This ensures that those changes will be seen by any other 460 * activity that is about to run. You will probably want to commit 461 * your data even more aggressively at key times during your 462 * activity's lifecycle: for example before starting a new 463 * activity, before finishing your own activity, when the user 464 * switches between input fields, etc.</p> 465 * </ul> 466 * 467 * <p>This model is designed to prevent data loss when a user is navigating 468 * between activities, and allows the system to safely kill an activity (because 469 * system resources are needed somewhere else) at any time after it has been 470 * paused. Note this implies 471 * that the user pressing BACK from your activity does <em>not</em> 472 * mean "cancel" -- it means to leave the activity with its current contents 473 * saved away. Cancelling edits in an activity must be provided through 474 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 475 * 476 * <p>See the {@linkplain android.content.ContentProvider content package} for 477 * more information about content providers. These are a key aspect of how 478 * different activities invoke and propagate data between themselves.</p> 479 * 480 * <p>The Activity class also provides an API for managing internal persistent state 481 * associated with an activity. This can be used, for example, to remember 482 * the user's preferred initial display in a calendar (day view or week view) 483 * or the user's default home page in a web browser.</p> 484 * 485 * <p>Activity persistent state is managed 486 * with the method {@link #getPreferences}, 487 * allowing you to retrieve and 488 * modify a set of name/value pairs associated with the activity. To use 489 * preferences that are shared across multiple application components 490 * (activities, receivers, services, providers), you can use the underlying 491 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 492 * to retrieve a preferences 493 * object stored under a specific name. 494 * (Note that it is not possible to share settings data across application 495 * packages -- for that you will need a content provider.)</p> 496 * 497 * <p>Here is an excerpt from a calendar activity that stores the user's 498 * preferred view mode in its persistent settings:</p> 499 * 500 * <pre class="prettyprint"> 501 * public class CalendarActivity extends Activity { 502 * ... 503 * 504 * static final int DAY_VIEW_MODE = 0; 505 * static final int WEEK_VIEW_MODE = 1; 506 * 507 * private SharedPreferences mPrefs; 508 * private int mCurViewMode; 509 * 510 * protected void onCreate(Bundle savedInstanceState) { 511 * super.onCreate(savedInstanceState); 512 * 513 * SharedPreferences mPrefs = getSharedPreferences(); 514 * mCurViewMode = mPrefs.getInt("view_mode" DAY_VIEW_MODE); 515 * } 516 * 517 * protected void onPause() { 518 * super.onPause(); 519 * 520 * SharedPreferences.Editor ed = mPrefs.edit(); 521 * ed.putInt("view_mode", mCurViewMode); 522 * ed.commit(); 523 * } 524 * } 525 * </pre> 526 * 527 * <a name="Permissions"></a> 528 * <h3>Permissions</h3> 529 * 530 * <p>The ability to start a particular Activity can be enforced when it is 531 * declared in its 532 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 533 * tag. By doing so, other applications will need to declare a corresponding 534 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 535 * element in their own manifest to be able to start that activity. 536 * 537 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 538 * document for more information on permissions and security in general. 539 * 540 * <a name="ProcessLifecycle"></a> 541 * <h3>Process Lifecycle</h3> 542 * 543 * <p>The Android system attempts to keep application process around for as 544 * long as possible, but eventually will need to remove old processes when 545 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 546 * Lifecycle</a>, the decision about which process to remove is intimately 547 * tied to the state of the user's interaction with it. In general, there 548 * are four states a process can be in based on the activities running in it, 549 * listed here in order of importance. The system will kill less important 550 * processes (the last ones) before it resorts to killing more important 551 * processes (the first ones). 552 * 553 * <ol> 554 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 555 * that the user is currently interacting with) is considered the most important. 556 * Its process will only be killed as a last resort, if it uses more memory 557 * than is available on the device. Generally at this point the device has 558 * reached a memory paging state, so this is required in order to keep the user 559 * interface responsive. 560 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 561 * but not in the foreground, such as one sitting behind a foreground dialog) 562 * is considered extremely important and will not be killed unless that is 563 * required to keep the foreground activity running. 564 * <li> <p>A <b>background activity</b> (an activity that is not visible to 565 * the user and has been paused) is no longer critical, so the system may 566 * safely kill its process to reclaim memory for other foreground or 567 * visible processes. If its process needs to be killed, when the user navigates 568 * back to the activity (making it visible on the screen again), its 569 * {@link #onCreate} method will be called with the savedInstanceState it had previously 570 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 571 * state as the user last left it. 572 * <li> <p>An <b>empty process</b> is one hosting no activities or other 573 * application components (such as {@link Service} or 574 * {@link android.content.BroadcastReceiver} classes). These are killed very 575 * quickly by the system as memory becomes low. For this reason, any 576 * background operation you do outside of an activity must be executed in the 577 * context of an activity BroadcastReceiver or Service to ensure that the system 578 * knows it needs to keep your process around. 579 * </ol> 580 * 581 * <p>Sometimes an Activity may need to do a long-running operation that exists 582 * independently of the activity lifecycle itself. An example may be a camera 583 * application that allows you to upload a picture to a web site. The upload 584 * may take a long time, and the application should allow the user to leave 585 * the application will it is executing. To accomplish this, your Activity 586 * should start a {@link Service} in which the upload takes place. This allows 587 * the system to properly prioritize your process (considering it to be more 588 * important than other non-visible applications) for the duration of the 589 * upload, independent of whether the original activity is paused, stopped, 590 * or finished. 591 */ 592public class Activity extends ContextThemeWrapper 593 implements LayoutInflater.Factory, 594 Window.Callback, KeyEvent.Callback, 595 OnCreateContextMenuListener, ComponentCallbacks { 596 private static final String TAG = "Activity"; 597 598 /** Standard activity result: operation canceled. */ 599 public static final int RESULT_CANCELED = 0; 600 /** Standard activity result: operation succeeded. */ 601 public static final int RESULT_OK = -1; 602 /** Start of user-defined activity results. */ 603 public static final int RESULT_FIRST_USER = 1; 604 605 private static long sInstanceCount = 0; 606 607 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 608 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 609 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 610 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 611 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 612 613 private static class ManagedDialog { 614 Dialog mDialog; 615 Bundle mArgs; 616 } 617 private SparseArray<ManagedDialog> mManagedDialogs; 618 619 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 620 private Instrumentation mInstrumentation; 621 private IBinder mToken; 622 private int mIdent; 623 /*package*/ String mEmbeddedID; 624 private Application mApplication; 625 /*package*/ Intent mIntent; 626 private ComponentName mComponent; 627 /*package*/ ActivityInfo mActivityInfo; 628 /*package*/ ActivityThread mMainThread; 629 /*package*/ Object mLastNonConfigurationInstance; 630 /*package*/ HashMap<String,Object> mLastNonConfigurationChildInstances; 631 Activity mParent; 632 boolean mCalled; 633 private boolean mResumed; 634 private boolean mStopped; 635 boolean mFinished; 636 boolean mStartedActivity; 637 /*package*/ int mConfigChangeFlags; 638 /*package*/ Configuration mCurrentConfig; 639 private SearchManager mSearchManager; 640 641 private Window mWindow; 642 643 private WindowManager mWindowManager; 644 /*package*/ View mDecor = null; 645 /*package*/ boolean mWindowAdded = false; 646 /*package*/ boolean mVisibleFromServer = false; 647 /*package*/ boolean mVisibleFromClient = true; 648 649 private CharSequence mTitle; 650 private int mTitleColor = 0; 651 652 private static final class ManagedCursor { 653 ManagedCursor(Cursor cursor) { 654 mCursor = cursor; 655 mReleased = false; 656 mUpdated = false; 657 } 658 659 private final Cursor mCursor; 660 private boolean mReleased; 661 private boolean mUpdated; 662 } 663 private final ArrayList<ManagedCursor> mManagedCursors = 664 new ArrayList<ManagedCursor>(); 665 666 // protected by synchronized (this) 667 int mResultCode = RESULT_CANCELED; 668 Intent mResultData = null; 669 670 private boolean mTitleReady = false; 671 672 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 673 private SpannableStringBuilder mDefaultKeySsb = null; 674 675 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 676 677 private Thread mUiThread; 678 private final Handler mHandler = new Handler(); 679 680 // Used for debug only 681 /* 682 public Activity() { 683 ++sInstanceCount; 684 } 685 686 @Override 687 protected void finalize() throws Throwable { 688 super.finalize(); 689 --sInstanceCount; 690 } 691 */ 692 693 public static long getInstanceCount() { 694 return sInstanceCount; 695 } 696 697 /** Return the intent that started this activity. */ 698 public Intent getIntent() { 699 return mIntent; 700 } 701 702 /** 703 * Change the intent returned by {@link #getIntent}. This holds a 704 * reference to the given intent; it does not copy it. Often used in 705 * conjunction with {@link #onNewIntent}. 706 * 707 * @param newIntent The new Intent object to return from getIntent 708 * 709 * @see #getIntent 710 * @see #onNewIntent 711 */ 712 public void setIntent(Intent newIntent) { 713 mIntent = newIntent; 714 } 715 716 /** Return the application that owns this activity. */ 717 public final Application getApplication() { 718 return mApplication; 719 } 720 721 /** Is this activity embedded inside of another activity? */ 722 public final boolean isChild() { 723 return mParent != null; 724 } 725 726 /** Return the parent activity if this view is an embedded child. */ 727 public final Activity getParent() { 728 return mParent; 729 } 730 731 /** Retrieve the window manager for showing custom windows. */ 732 public WindowManager getWindowManager() { 733 return mWindowManager; 734 } 735 736 /** 737 * Retrieve the current {@link android.view.Window} for the activity. 738 * This can be used to directly access parts of the Window API that 739 * are not available through Activity/Screen. 740 * 741 * @return Window The current window, or null if the activity is not 742 * visual. 743 */ 744 public Window getWindow() { 745 return mWindow; 746 } 747 748 /** 749 * Calls {@link android.view.Window#getCurrentFocus} on the 750 * Window of this Activity to return the currently focused view. 751 * 752 * @return View The current View with focus or null. 753 * 754 * @see #getWindow 755 * @see android.view.Window#getCurrentFocus 756 */ 757 public View getCurrentFocus() { 758 return mWindow != null ? mWindow.getCurrentFocus() : null; 759 } 760 761 @Override 762 public int getWallpaperDesiredMinimumWidth() { 763 int width = super.getWallpaperDesiredMinimumWidth(); 764 return width <= 0 ? getWindowManager().getDefaultDisplay().getWidth() : width; 765 } 766 767 @Override 768 public int getWallpaperDesiredMinimumHeight() { 769 int height = super.getWallpaperDesiredMinimumHeight(); 770 return height <= 0 ? getWindowManager().getDefaultDisplay().getHeight() : height; 771 } 772 773 /** 774 * Called when the activity is starting. This is where most initialization 775 * should go: calling {@link #setContentView(int)} to inflate the 776 * activity's UI, using {@link #findViewById} to programmatically interact 777 * with widgets in the UI, calling 778 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 779 * cursors for data being displayed, etc. 780 * 781 * <p>You can call {@link #finish} from within this function, in 782 * which case onDestroy() will be immediately called without any of the rest 783 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 784 * {@link #onPause}, etc) executing. 785 * 786 * <p><em>Derived classes must call through to the super class's 787 * implementation of this method. If they do not, an exception will be 788 * thrown.</em></p> 789 * 790 * @param savedInstanceState If the activity is being re-initialized after 791 * previously being shut down then this Bundle contains the data it most 792 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 793 * 794 * @see #onStart 795 * @see #onSaveInstanceState 796 * @see #onRestoreInstanceState 797 * @see #onPostCreate 798 */ 799 protected void onCreate(Bundle savedInstanceState) { 800 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 801 com.android.internal.R.styleable.Window_windowNoDisplay, false); 802 mCalled = true; 803 } 804 805 /** 806 * The hook for {@link ActivityThread} to restore the state of this activity. 807 * 808 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 809 * {@link #restoreManagedDialogs(android.os.Bundle)}. 810 * 811 * @param savedInstanceState contains the saved state 812 */ 813 final void performRestoreInstanceState(Bundle savedInstanceState) { 814 onRestoreInstanceState(savedInstanceState); 815 restoreManagedDialogs(savedInstanceState); 816 } 817 818 /** 819 * This method is called after {@link #onStart} when the activity is 820 * being re-initialized from a previously saved state, given here in 821 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 822 * to restore their state, but it is sometimes convenient to do it here 823 * after all of the initialization has been done or to allow subclasses to 824 * decide whether to use your default implementation. The default 825 * implementation of this method performs a restore of any view state that 826 * had previously been frozen by {@link #onSaveInstanceState}. 827 * 828 * <p>This method is called between {@link #onStart} and 829 * {@link #onPostCreate}. 830 * 831 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 832 * 833 * @see #onCreate 834 * @see #onPostCreate 835 * @see #onResume 836 * @see #onSaveInstanceState 837 */ 838 protected void onRestoreInstanceState(Bundle savedInstanceState) { 839 if (mWindow != null) { 840 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 841 if (windowState != null) { 842 mWindow.restoreHierarchyState(windowState); 843 } 844 } 845 } 846 847 /** 848 * Restore the state of any saved managed dialogs. 849 * 850 * @param savedInstanceState The bundle to restore from. 851 */ 852 private void restoreManagedDialogs(Bundle savedInstanceState) { 853 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 854 if (b == null) { 855 return; 856 } 857 858 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 859 final int numDialogs = ids.length; 860 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 861 for (int i = 0; i < numDialogs; i++) { 862 final Integer dialogId = ids[i]; 863 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 864 if (dialogState != null) { 865 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 866 // so tell createDialog() not to do it, otherwise we get an exception 867 final ManagedDialog md = new ManagedDialog(); 868 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 869 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 870 if (md.mDialog != null) { 871 mManagedDialogs.put(dialogId, md); 872 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 873 md.mDialog.onRestoreInstanceState(dialogState); 874 } 875 } 876 } 877 } 878 879 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 880 final Dialog dialog = onCreateDialog(dialogId, args); 881 if (dialog == null) { 882 return null; 883 } 884 dialog.dispatchOnCreate(state); 885 return dialog; 886 } 887 888 private static String savedDialogKeyFor(int key) { 889 return SAVED_DIALOG_KEY_PREFIX + key; 890 } 891 892 private static String savedDialogArgsKeyFor(int key) { 893 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 894 } 895 896 /** 897 * Called when activity start-up is complete (after {@link #onStart} 898 * and {@link #onRestoreInstanceState} have been called). Applications will 899 * generally not implement this method; it is intended for system 900 * classes to do final initialization after application code has run. 901 * 902 * <p><em>Derived classes must call through to the super class's 903 * implementation of this method. If they do not, an exception will be 904 * thrown.</em></p> 905 * 906 * @param savedInstanceState If the activity is being re-initialized after 907 * previously being shut down then this Bundle contains the data it most 908 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 909 * @see #onCreate 910 */ 911 protected void onPostCreate(Bundle savedInstanceState) { 912 if (!isChild()) { 913 mTitleReady = true; 914 onTitleChanged(getTitle(), getTitleColor()); 915 } 916 mCalled = true; 917 } 918 919 /** 920 * Called after {@link #onCreate} — or after {@link #onRestart} when 921 * the activity had been stopped, but is now again being displayed to the 922 * user. It will be followed by {@link #onResume}. 923 * 924 * <p><em>Derived classes must call through to the super class's 925 * implementation of this method. If they do not, an exception will be 926 * thrown.</em></p> 927 * 928 * @see #onCreate 929 * @see #onStop 930 * @see #onResume 931 */ 932 protected void onStart() { 933 mCalled = true; 934 } 935 936 /** 937 * Called after {@link #onStop} when the current activity is being 938 * re-displayed to the user (the user has navigated back to it). It will 939 * be followed by {@link #onStart} and then {@link #onResume}. 940 * 941 * <p>For activities that are using raw {@link Cursor} objects (instead of 942 * creating them through 943 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 944 * this is usually the place 945 * where the cursor should be requeried (because you had deactivated it in 946 * {@link #onStop}. 947 * 948 * <p><em>Derived classes must call through to the super class's 949 * implementation of this method. If they do not, an exception will be 950 * thrown.</em></p> 951 * 952 * @see #onStop 953 * @see #onStart 954 * @see #onResume 955 */ 956 protected void onRestart() { 957 mCalled = true; 958 } 959 960 /** 961 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 962 * {@link #onPause}, for your activity to start interacting with the user. 963 * This is a good place to begin animations, open exclusive-access devices 964 * (such as the camera), etc. 965 * 966 * <p>Keep in mind that onResume is not the best indicator that your activity 967 * is visible to the user; a system window such as the keyguard may be in 968 * front. Use {@link #onWindowFocusChanged} to know for certain that your 969 * activity is visible to the user (for example, to resume a game). 970 * 971 * <p><em>Derived classes must call through to the super class's 972 * implementation of this method. If they do not, an exception will be 973 * thrown.</em></p> 974 * 975 * @see #onRestoreInstanceState 976 * @see #onRestart 977 * @see #onPostResume 978 * @see #onPause 979 */ 980 protected void onResume() { 981 mCalled = true; 982 } 983 984 /** 985 * Called when activity resume is complete (after {@link #onResume} has 986 * been called). Applications will generally not implement this method; 987 * it is intended for system classes to do final setup after application 988 * resume code has run. 989 * 990 * <p><em>Derived classes must call through to the super class's 991 * implementation of this method. If they do not, an exception will be 992 * thrown.</em></p> 993 * 994 * @see #onResume 995 */ 996 protected void onPostResume() { 997 final Window win = getWindow(); 998 if (win != null) win.makeActive(); 999 mCalled = true; 1000 } 1001 1002 /** 1003 * This is called for activities that set launchMode to "singleTop" in 1004 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1005 * flag when calling {@link #startActivity}. In either case, when the 1006 * activity is re-launched while at the top of the activity stack instead 1007 * of a new instance of the activity being started, onNewIntent() will be 1008 * called on the existing instance with the Intent that was used to 1009 * re-launch it. 1010 * 1011 * <p>An activity will always be paused before receiving a new intent, so 1012 * you can count on {@link #onResume} being called after this method. 1013 * 1014 * <p>Note that {@link #getIntent} still returns the original Intent. You 1015 * can use {@link #setIntent} to update it to this new Intent. 1016 * 1017 * @param intent The new intent that was started for the activity. 1018 * 1019 * @see #getIntent 1020 * @see #setIntent 1021 * @see #onResume 1022 */ 1023 protected void onNewIntent(Intent intent) { 1024 } 1025 1026 /** 1027 * The hook for {@link ActivityThread} to save the state of this activity. 1028 * 1029 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1030 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1031 * 1032 * @param outState The bundle to save the state to. 1033 */ 1034 final void performSaveInstanceState(Bundle outState) { 1035 onSaveInstanceState(outState); 1036 saveManagedDialogs(outState); 1037 } 1038 1039 /** 1040 * Called to retrieve per-instance state from an activity before being killed 1041 * so that the state can be restored in {@link #onCreate} or 1042 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1043 * will be passed to both). 1044 * 1045 * <p>This method is called before an activity may be killed so that when it 1046 * comes back some time in the future it can restore its state. For example, 1047 * if activity B is launched in front of activity A, and at some point activity 1048 * A is killed to reclaim resources, activity A will have a chance to save the 1049 * current state of its user interface via this method so that when the user 1050 * returns to activity A, the state of the user interface can be restored 1051 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1052 * 1053 * <p>Do not confuse this method with activity lifecycle callbacks such as 1054 * {@link #onPause}, which is always called when an activity is being placed 1055 * in the background or on its way to destruction, or {@link #onStop} which 1056 * is called before destruction. One example of when {@link #onPause} and 1057 * {@link #onStop} is called and not this method is when a user navigates back 1058 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1059 * on B because that particular instance will never be restored, so the 1060 * system avoids calling it. An example when {@link #onPause} is called and 1061 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1062 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1063 * killed during the lifetime of B since the state of the user interface of 1064 * A will stay intact. 1065 * 1066 * <p>The default implementation takes care of most of the UI per-instance 1067 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1068 * view in the hierarchy that has an id, and by saving the id of the currently 1069 * focused view (all of which is restored by the default implementation of 1070 * {@link #onRestoreInstanceState}). If you override this method to save additional 1071 * information not captured by each individual view, you will likely want to 1072 * call through to the default implementation, otherwise be prepared to save 1073 * all of the state of each view yourself. 1074 * 1075 * <p>If called, this method will occur before {@link #onStop}. There are 1076 * no guarantees about whether it will occur before or after {@link #onPause}. 1077 * 1078 * @param outState Bundle in which to place your saved state. 1079 * 1080 * @see #onCreate 1081 * @see #onRestoreInstanceState 1082 * @see #onPause 1083 */ 1084 protected void onSaveInstanceState(Bundle outState) { 1085 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1086 } 1087 1088 /** 1089 * Save the state of any managed dialogs. 1090 * 1091 * @param outState place to store the saved state. 1092 */ 1093 private void saveManagedDialogs(Bundle outState) { 1094 if (mManagedDialogs == null) { 1095 return; 1096 } 1097 1098 final int numDialogs = mManagedDialogs.size(); 1099 if (numDialogs == 0) { 1100 return; 1101 } 1102 1103 Bundle dialogState = new Bundle(); 1104 1105 int[] ids = new int[mManagedDialogs.size()]; 1106 1107 // save each dialog's bundle, gather the ids 1108 for (int i = 0; i < numDialogs; i++) { 1109 final int key = mManagedDialogs.keyAt(i); 1110 ids[i] = key; 1111 final ManagedDialog md = mManagedDialogs.valueAt(i); 1112 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1113 if (md.mArgs != null) { 1114 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1115 } 1116 } 1117 1118 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1119 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1120 } 1121 1122 1123 /** 1124 * Called as part of the activity lifecycle when an activity is going into 1125 * the background, but has not (yet) been killed. The counterpart to 1126 * {@link #onResume}. 1127 * 1128 * <p>When activity B is launched in front of activity A, this callback will 1129 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1130 * so be sure to not do anything lengthy here. 1131 * 1132 * <p>This callback is mostly used for saving any persistent state the 1133 * activity is editing, to present a "edit in place" model to the user and 1134 * making sure nothing is lost if there are not enough resources to start 1135 * the new activity without first killing this one. This is also a good 1136 * place to do things like stop animations and other things that consume a 1137 * noticeable mount of CPU in order to make the switch to the next activity 1138 * as fast as possible, or to close resources that are exclusive access 1139 * such as the camera. 1140 * 1141 * <p>In situations where the system needs more memory it may kill paused 1142 * processes to reclaim resources. Because of this, you should be sure 1143 * that all of your state is saved by the time you return from 1144 * this function. In general {@link #onSaveInstanceState} is used to save 1145 * per-instance state in the activity and this method is used to store 1146 * global persistent data (in content providers, files, etc.) 1147 * 1148 * <p>After receiving this call you will usually receive a following call 1149 * to {@link #onStop} (after the next activity has been resumed and 1150 * displayed), however in some cases there will be a direct call back to 1151 * {@link #onResume} without going through the stopped state. 1152 * 1153 * <p><em>Derived classes must call through to the super class's 1154 * implementation of this method. If they do not, an exception will be 1155 * thrown.</em></p> 1156 * 1157 * @see #onResume 1158 * @see #onSaveInstanceState 1159 * @see #onStop 1160 */ 1161 protected void onPause() { 1162 mCalled = true; 1163 } 1164 1165 /** 1166 * Called as part of the activity lifecycle when an activity is about to go 1167 * into the background as the result of user choice. For example, when the 1168 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1169 * when an incoming phone call causes the in-call Activity to be automatically 1170 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1171 * the activity being interrupted. In cases when it is invoked, this method 1172 * is called right before the activity's {@link #onPause} callback. 1173 * 1174 * <p>This callback and {@link #onUserInteraction} are intended to help 1175 * activities manage status bar notifications intelligently; specifically, 1176 * for helping activities determine the proper time to cancel a notfication. 1177 * 1178 * @see #onUserInteraction() 1179 */ 1180 protected void onUserLeaveHint() { 1181 } 1182 1183 /** 1184 * Generate a new thumbnail for this activity. This method is called before 1185 * pausing the activity, and should draw into <var>outBitmap</var> the 1186 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1187 * can use the given <var>canvas</var>, which is configured to draw into the 1188 * bitmap, for rendering if desired. 1189 * 1190 * <p>The default implementation renders the Screen's current view 1191 * hierarchy into the canvas to generate a thumbnail. 1192 * 1193 * <p>If you return false, the bitmap will be filled with a default 1194 * thumbnail. 1195 * 1196 * @param outBitmap The bitmap to contain the thumbnail. 1197 * @param canvas Can be used to render into the bitmap. 1198 * 1199 * @return Return true if you have drawn into the bitmap; otherwise after 1200 * you return it will be filled with a default thumbnail. 1201 * 1202 * @see #onCreateDescription 1203 * @see #onSaveInstanceState 1204 * @see #onPause 1205 */ 1206 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1207 final View view = mDecor; 1208 if (view == null) { 1209 return false; 1210 } 1211 1212 final int vw = view.getWidth(); 1213 final int vh = view.getHeight(); 1214 final int dw = outBitmap.getWidth(); 1215 final int dh = outBitmap.getHeight(); 1216 1217 canvas.save(); 1218 canvas.scale(((float)dw)/vw, ((float)dh)/vh); 1219 view.draw(canvas); 1220 canvas.restore(); 1221 1222 return true; 1223 } 1224 1225 /** 1226 * Generate a new description for this activity. This method is called 1227 * before pausing the activity and can, if desired, return some textual 1228 * description of its current state to be displayed to the user. 1229 * 1230 * <p>The default implementation returns null, which will cause you to 1231 * inherit the description from the previous activity. If all activities 1232 * return null, generally the label of the top activity will be used as the 1233 * description. 1234 * 1235 * @return A description of what the user is doing. It should be short and 1236 * sweet (only a few words). 1237 * 1238 * @see #onCreateThumbnail 1239 * @see #onSaveInstanceState 1240 * @see #onPause 1241 */ 1242 public CharSequence onCreateDescription() { 1243 return null; 1244 } 1245 1246 /** 1247 * Called when you are no longer visible to the user. You will next 1248 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1249 * depending on later user activity. 1250 * 1251 * <p>Note that this method may never be called, in low memory situations 1252 * where the system does not have enough memory to keep your activity's 1253 * process running after its {@link #onPause} method is called. 1254 * 1255 * <p><em>Derived classes must call through to the super class's 1256 * implementation of this method. If they do not, an exception will be 1257 * thrown.</em></p> 1258 * 1259 * @see #onRestart 1260 * @see #onResume 1261 * @see #onSaveInstanceState 1262 * @see #onDestroy 1263 */ 1264 protected void onStop() { 1265 mCalled = true; 1266 } 1267 1268 /** 1269 * Perform any final cleanup before an activity is destroyed. This can 1270 * happen either because the activity is finishing (someone called 1271 * {@link #finish} on it, or because the system is temporarily destroying 1272 * this instance of the activity to save space. You can distinguish 1273 * between these two scenarios with the {@link #isFinishing} method. 1274 * 1275 * <p><em>Note: do not count on this method being called as a place for 1276 * saving data! For example, if an activity is editing data in a content 1277 * provider, those edits should be committed in either {@link #onPause} or 1278 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1279 * free resources like threads that are associated with an activity, so 1280 * that a destroyed activity does not leave such things around while the 1281 * rest of its application is still running. There are situations where 1282 * the system will simply kill the activity's hosting process without 1283 * calling this method (or any others) in it, so it should not be used to 1284 * do things that are intended to remain around after the process goes 1285 * away. 1286 * 1287 * <p><em>Derived classes must call through to the super class's 1288 * implementation of this method. If they do not, an exception will be 1289 * thrown.</em></p> 1290 * 1291 * @see #onPause 1292 * @see #onStop 1293 * @see #finish 1294 * @see #isFinishing 1295 */ 1296 protected void onDestroy() { 1297 mCalled = true; 1298 1299 // dismiss any dialogs we are managing. 1300 if (mManagedDialogs != null) { 1301 final int numDialogs = mManagedDialogs.size(); 1302 for (int i = 0; i < numDialogs; i++) { 1303 final ManagedDialog md = mManagedDialogs.valueAt(i); 1304 if (md.mDialog.isShowing()) { 1305 md.mDialog.dismiss(); 1306 } 1307 } 1308 mManagedDialogs = null; 1309 } 1310 1311 // close any cursors we are managing. 1312 synchronized (mManagedCursors) { 1313 int numCursors = mManagedCursors.size(); 1314 for (int i = 0; i < numCursors; i++) { 1315 ManagedCursor c = mManagedCursors.get(i); 1316 if (c != null) { 1317 c.mCursor.close(); 1318 } 1319 } 1320 mManagedCursors.clear(); 1321 } 1322 1323 // Close any open search dialog 1324 if (mSearchManager != null) { 1325 mSearchManager.stopSearch(); 1326 } 1327 } 1328 1329 /** 1330 * Called by the system when the device configuration changes while your 1331 * activity is running. Note that this will <em>only</em> be called if 1332 * you have selected configurations you would like to handle with the 1333 * {@link android.R.attr#configChanges} attribute in your manifest. If 1334 * any configuration change occurs that is not selected to be reported 1335 * by that attribute, then instead of reporting it the system will stop 1336 * and restart the activity (to have it launched with the new 1337 * configuration). 1338 * 1339 * <p>At the time that this function has been called, your Resources 1340 * object will have been updated to return resource values matching the 1341 * new configuration. 1342 * 1343 * @param newConfig The new device configuration. 1344 */ 1345 public void onConfigurationChanged(Configuration newConfig) { 1346 mCalled = true; 1347 1348 if (mWindow != null) { 1349 // Pass the configuration changed event to the window 1350 mWindow.onConfigurationChanged(newConfig); 1351 } 1352 } 1353 1354 /** 1355 * If this activity is being destroyed because it can not handle a 1356 * configuration parameter being changed (and thus its 1357 * {@link #onConfigurationChanged(Configuration)} method is 1358 * <em>not</em> being called), then you can use this method to discover 1359 * the set of changes that have occurred while in the process of being 1360 * destroyed. Note that there is no guarantee that these will be 1361 * accurate (other changes could have happened at any time), so you should 1362 * only use this as an optimization hint. 1363 * 1364 * @return Returns a bit field of the configuration parameters that are 1365 * changing, as defined by the {@link android.content.res.Configuration} 1366 * class. 1367 */ 1368 public int getChangingConfigurations() { 1369 return mConfigChangeFlags; 1370 } 1371 1372 /** 1373 * Retrieve the non-configuration instance data that was previously 1374 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1375 * be available from the initial {@link #onCreate} and 1376 * {@link #onStart} calls to the new instance, allowing you to extract 1377 * any useful dynamic state from the previous instance. 1378 * 1379 * <p>Note that the data you retrieve here should <em>only</em> be used 1380 * as an optimization for handling configuration changes. You should always 1381 * be able to handle getting a null pointer back, and an activity must 1382 * still be able to restore itself to its previous state (through the 1383 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1384 * function returns null. 1385 * 1386 * @return Returns the object previously returned by 1387 * {@link #onRetainNonConfigurationInstance()}. 1388 */ 1389 public Object getLastNonConfigurationInstance() { 1390 return mLastNonConfigurationInstance; 1391 } 1392 1393 /** 1394 * Called by the system, as part of destroying an 1395 * activity due to a configuration change, when it is known that a new 1396 * instance will immediately be created for the new configuration. You 1397 * can return any object you like here, including the activity instance 1398 * itself, which can later be retrieved by calling 1399 * {@link #getLastNonConfigurationInstance()} in the new activity 1400 * instance. 1401 * 1402 * <p>This function is called purely as an optimization, and you must 1403 * not rely on it being called. When it is called, a number of guarantees 1404 * will be made to help optimize configuration switching: 1405 * <ul> 1406 * <li> The function will be called between {@link #onStop} and 1407 * {@link #onDestroy}. 1408 * <li> A new instance of the activity will <em>always</em> be immediately 1409 * created after this one's {@link #onDestroy()} is called. 1410 * <li> The object you return here will <em>always</em> be available from 1411 * the {@link #getLastNonConfigurationInstance()} method of the following 1412 * activity instance as described there. 1413 * </ul> 1414 * 1415 * <p>These guarantees are designed so that an activity can use this API 1416 * to propagate extensive state from the old to new activity instance, from 1417 * loaded bitmaps, to network connections, to evenly actively running 1418 * threads. Note that you should <em>not</em> propagate any data that 1419 * may change based on the configuration, including any data loaded from 1420 * resources such as strings, layouts, or drawables. 1421 * 1422 * @return Return any Object holding the desired state to propagate to the 1423 * next activity instance. 1424 */ 1425 public Object onRetainNonConfigurationInstance() { 1426 return null; 1427 } 1428 1429 /** 1430 * Retrieve the non-configuration instance data that was previously 1431 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1432 * be available from the initial {@link #onCreate} and 1433 * {@link #onStart} calls to the new instance, allowing you to extract 1434 * any useful dynamic state from the previous instance. 1435 * 1436 * <p>Note that the data you retrieve here should <em>only</em> be used 1437 * as an optimization for handling configuration changes. You should always 1438 * be able to handle getting a null pointer back, and an activity must 1439 * still be able to restore itself to its previous state (through the 1440 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1441 * function returns null. 1442 * 1443 * @return Returns the object previously returned by 1444 * {@link #onRetainNonConfigurationChildInstances()} 1445 */ 1446 HashMap<String,Object> getLastNonConfigurationChildInstances() { 1447 return mLastNonConfigurationChildInstances; 1448 } 1449 1450 /** 1451 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1452 * it should return either a mapping from child activity id strings to arbitrary objects, 1453 * or null. This method is intended to be used by Activity framework subclasses that control a 1454 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1455 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1456 */ 1457 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1458 return null; 1459 } 1460 1461 public void onLowMemory() { 1462 mCalled = true; 1463 } 1464 1465 /** 1466 * Wrapper around 1467 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1468 * that gives the resulting {@link Cursor} to call 1469 * {@link #startManagingCursor} so that the activity will manage its 1470 * lifecycle for you. 1471 * 1472 * @param uri The URI of the content provider to query. 1473 * @param projection List of columns to return. 1474 * @param selection SQL WHERE clause. 1475 * @param sortOrder SQL ORDER BY clause. 1476 * 1477 * @return The Cursor that was returned by query(). 1478 * 1479 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1480 * @see #startManagingCursor 1481 * @hide 1482 */ 1483 public final Cursor managedQuery(Uri uri, 1484 String[] projection, 1485 String selection, 1486 String sortOrder) 1487 { 1488 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1489 if (c != null) { 1490 startManagingCursor(c); 1491 } 1492 return c; 1493 } 1494 1495 /** 1496 * Wrapper around 1497 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1498 * that gives the resulting {@link Cursor} to call 1499 * {@link #startManagingCursor} so that the activity will manage its 1500 * lifecycle for you. 1501 * 1502 * @param uri The URI of the content provider to query. 1503 * @param projection List of columns to return. 1504 * @param selection SQL WHERE clause. 1505 * @param selectionArgs The arguments to selection, if any ?s are pesent 1506 * @param sortOrder SQL ORDER BY clause. 1507 * 1508 * @return The Cursor that was returned by query(). 1509 * 1510 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1511 * @see #startManagingCursor 1512 */ 1513 public final Cursor managedQuery(Uri uri, 1514 String[] projection, 1515 String selection, 1516 String[] selectionArgs, 1517 String sortOrder) 1518 { 1519 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1520 if (c != null) { 1521 startManagingCursor(c); 1522 } 1523 return c; 1524 } 1525 1526 /** 1527 * Wrapper around {@link Cursor#commitUpdates()} that takes care of noting 1528 * that the Cursor needs to be requeried. You can call this method in 1529 * {@link #onPause} or {@link #onStop} to have the system call 1530 * {@link Cursor#requery} for you if the activity is later resumed. This 1531 * allows you to avoid determing when to do the requery yourself (which is 1532 * required for the Cursor to see any data changes that were committed with 1533 * it). 1534 * 1535 * @param c The Cursor whose changes are to be committed. 1536 * 1537 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1538 * @see #startManagingCursor 1539 * @see Cursor#commitUpdates() 1540 * @see Cursor#requery 1541 * @hide 1542 */ 1543 @Deprecated 1544 public void managedCommitUpdates(Cursor c) { 1545 synchronized (mManagedCursors) { 1546 final int N = mManagedCursors.size(); 1547 for (int i=0; i<N; i++) { 1548 ManagedCursor mc = mManagedCursors.get(i); 1549 if (mc.mCursor == c) { 1550 c.commitUpdates(); 1551 mc.mUpdated = true; 1552 return; 1553 } 1554 } 1555 throw new RuntimeException( 1556 "Cursor " + c + " is not currently managed"); 1557 } 1558 } 1559 1560 /** 1561 * This method allows the activity to take care of managing the given 1562 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1563 * That is, when the activity is stopped it will automatically call 1564 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1565 * it will call {@link Cursor#requery} for you. When the activity is 1566 * destroyed, all managed Cursors will be closed automatically. 1567 * 1568 * @param c The Cursor to be managed. 1569 * 1570 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1571 * @see #stopManagingCursor 1572 */ 1573 public void startManagingCursor(Cursor c) { 1574 synchronized (mManagedCursors) { 1575 mManagedCursors.add(new ManagedCursor(c)); 1576 } 1577 } 1578 1579 /** 1580 * Given a Cursor that was previously given to 1581 * {@link #startManagingCursor}, stop the activity's management of that 1582 * cursor. 1583 * 1584 * @param c The Cursor that was being managed. 1585 * 1586 * @see #startManagingCursor 1587 */ 1588 public void stopManagingCursor(Cursor c) { 1589 synchronized (mManagedCursors) { 1590 final int N = mManagedCursors.size(); 1591 for (int i=0; i<N; i++) { 1592 ManagedCursor mc = mManagedCursors.get(i); 1593 if (mc.mCursor == c) { 1594 mManagedCursors.remove(i); 1595 break; 1596 } 1597 } 1598 } 1599 } 1600 1601 /** 1602 * Control whether this activity is required to be persistent. By default 1603 * activities are not persistent; setting this to true will prevent the 1604 * system from stopping this activity or its process when running low on 1605 * resources. 1606 * 1607 * <p><em>You should avoid using this method</em>, it has severe negative 1608 * consequences on how well the system can manage its resources. A better 1609 * approach is to implement an application service that you control with 1610 * {@link Context#startService} and {@link Context#stopService}. 1611 * 1612 * @param isPersistent Control whether the current activity must be 1613 * persistent, true if so, false for the normal 1614 * behavior. 1615 */ 1616 public void setPersistent(boolean isPersistent) { 1617 if (mParent == null) { 1618 try { 1619 ActivityManagerNative.getDefault() 1620 .setPersistent(mToken, isPersistent); 1621 } catch (RemoteException e) { 1622 // Empty 1623 } 1624 } else { 1625 throw new RuntimeException("setPersistent() not yet supported for embedded activities"); 1626 } 1627 } 1628 1629 /** 1630 * Finds a view that was identified by the id attribute from the XML that 1631 * was processed in {@link #onCreate}. 1632 * 1633 * @return The view if found or null otherwise. 1634 */ 1635 public View findViewById(int id) { 1636 return getWindow().findViewById(id); 1637 } 1638 1639 /** 1640 * Set the activity content from a layout resource. The resource will be 1641 * inflated, adding all top-level views to the activity. 1642 * 1643 * @param layoutResID Resource ID to be inflated. 1644 */ 1645 public void setContentView(int layoutResID) { 1646 getWindow().setContentView(layoutResID); 1647 } 1648 1649 /** 1650 * Set the activity content to an explicit view. This view is placed 1651 * directly into the activity's view hierarchy. It can itself be a complex 1652 * view hierarhcy. 1653 * 1654 * @param view The desired content to display. 1655 */ 1656 public void setContentView(View view) { 1657 getWindow().setContentView(view); 1658 } 1659 1660 /** 1661 * Set the activity content to an explicit view. This view is placed 1662 * directly into the activity's view hierarchy. It can itself be a complex 1663 * view hierarhcy. 1664 * 1665 * @param view The desired content to display. 1666 * @param params Layout parameters for the view. 1667 */ 1668 public void setContentView(View view, ViewGroup.LayoutParams params) { 1669 getWindow().setContentView(view, params); 1670 } 1671 1672 /** 1673 * Add an additional content view to the activity. Added after any existing 1674 * ones in the activity -- existing views are NOT removed. 1675 * 1676 * @param view The desired content to display. 1677 * @param params Layout parameters for the view. 1678 */ 1679 public void addContentView(View view, ViewGroup.LayoutParams params) { 1680 getWindow().addContentView(view, params); 1681 } 1682 1683 /** 1684 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1685 * keys. 1686 * 1687 * @see #setDefaultKeyMode 1688 */ 1689 static public final int DEFAULT_KEYS_DISABLE = 0; 1690 /** 1691 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1692 * key handling. 1693 * 1694 * @see #setDefaultKeyMode 1695 */ 1696 static public final int DEFAULT_KEYS_DIALER = 1; 1697 /** 1698 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1699 * default key handling. 1700 * 1701 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1702 * 1703 * @see #setDefaultKeyMode 1704 */ 1705 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1706 /** 1707 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1708 * will start an application-defined search. (If the application or activity does not 1709 * actually define a search, the the keys will be ignored.) 1710 * 1711 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1712 * 1713 * @see #setDefaultKeyMode 1714 */ 1715 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1716 1717 /** 1718 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1719 * will start a global search (typically web search, but some platforms may define alternate 1720 * methods for global search) 1721 * 1722 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1723 * 1724 * @see #setDefaultKeyMode 1725 */ 1726 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1727 1728 /** 1729 * Select the default key handling for this activity. This controls what 1730 * will happen to key events that are not otherwise handled. The default 1731 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1732 * floor. Other modes allow you to launch the dialer 1733 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1734 * menu without requiring the menu key be held down 1735 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1736 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1737 * 1738 * <p>Note that the mode selected here does not impact the default 1739 * handling of system keys, such as the "back" and "menu" keys, and your 1740 * activity and its views always get a first chance to receive and handle 1741 * all application keys. 1742 * 1743 * @param mode The desired default key mode constant. 1744 * 1745 * @see #DEFAULT_KEYS_DISABLE 1746 * @see #DEFAULT_KEYS_DIALER 1747 * @see #DEFAULT_KEYS_SHORTCUT 1748 * @see #DEFAULT_KEYS_SEARCH_LOCAL 1749 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 1750 * @see #onKeyDown 1751 */ 1752 public final void setDefaultKeyMode(int mode) { 1753 mDefaultKeyMode = mode; 1754 1755 // Some modes use a SpannableStringBuilder to track & dispatch input events 1756 // This list must remain in sync with the switch in onKeyDown() 1757 switch (mode) { 1758 case DEFAULT_KEYS_DISABLE: 1759 case DEFAULT_KEYS_SHORTCUT: 1760 mDefaultKeySsb = null; // not used in these modes 1761 break; 1762 case DEFAULT_KEYS_DIALER: 1763 case DEFAULT_KEYS_SEARCH_LOCAL: 1764 case DEFAULT_KEYS_SEARCH_GLOBAL: 1765 mDefaultKeySsb = new SpannableStringBuilder(); 1766 Selection.setSelection(mDefaultKeySsb,0); 1767 break; 1768 default: 1769 throw new IllegalArgumentException(); 1770 } 1771 } 1772 1773 /** 1774 * Called when a key was pressed down and not handled by any of the views 1775 * inside of the activity. So, for example, key presses while the cursor 1776 * is inside a TextView will not trigger the event (unless it is a navigation 1777 * to another object) because TextView handles its own key presses. 1778 * 1779 * <p>If the focused view didn't want this event, this method is called. 1780 * 1781 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 1782 * by calling {@link #onBackPressed()}, though the behavior varies based 1783 * on the application compatibility mode: for 1784 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 1785 * it will set up the dispatch to call {@link #onKeyUp} where the action 1786 * will be performed; for earlier applications, it will perform the 1787 * action immediately in on-down, as those versions of the platform 1788 * behaved. 1789 * 1790 * <p>Other additional default key handling may be performed 1791 * if configured with {@link #setDefaultKeyMode}. 1792 * 1793 * @return Return <code>true</code> to prevent this event from being propagated 1794 * further, or <code>false</code> to indicate that you have not handled 1795 * this event and it should continue to be propagated. 1796 * @see #onKeyUp 1797 * @see android.view.KeyEvent 1798 */ 1799 public boolean onKeyDown(int keyCode, KeyEvent event) { 1800 if (keyCode == KeyEvent.KEYCODE_BACK) { 1801 if (getApplicationInfo().targetSdkVersion 1802 >= Build.VERSION_CODES.ECLAIR) { 1803 event.startTracking(); 1804 } else { 1805 onBackPressed(); 1806 } 1807 return true; 1808 } 1809 1810 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 1811 return false; 1812 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 1813 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 1814 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 1815 return true; 1816 } 1817 return false; 1818 } else { 1819 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 1820 boolean clearSpannable = false; 1821 boolean handled; 1822 if ((event.getRepeatCount() != 0) || event.isSystem()) { 1823 clearSpannable = true; 1824 handled = false; 1825 } else { 1826 handled = TextKeyListener.getInstance().onKeyDown( 1827 null, mDefaultKeySsb, keyCode, event); 1828 if (handled && mDefaultKeySsb.length() > 0) { 1829 // something useable has been typed - dispatch it now. 1830 1831 final String str = mDefaultKeySsb.toString(); 1832 clearSpannable = true; 1833 1834 switch (mDefaultKeyMode) { 1835 case DEFAULT_KEYS_DIALER: 1836 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 1837 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 1838 startActivity(intent); 1839 break; 1840 case DEFAULT_KEYS_SEARCH_LOCAL: 1841 startSearch(str, false, null, false); 1842 break; 1843 case DEFAULT_KEYS_SEARCH_GLOBAL: 1844 startSearch(str, false, null, true); 1845 break; 1846 } 1847 } 1848 } 1849 if (clearSpannable) { 1850 mDefaultKeySsb.clear(); 1851 mDefaultKeySsb.clearSpans(); 1852 Selection.setSelection(mDefaultKeySsb,0); 1853 } 1854 return handled; 1855 } 1856 } 1857 1858 /** 1859 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 1860 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 1861 * the event). 1862 */ 1863 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 1864 return false; 1865 } 1866 1867 /** 1868 * Called when a key was released and not handled by any of the views 1869 * inside of the activity. So, for example, key presses while the cursor 1870 * is inside a TextView will not trigger the event (unless it is a navigation 1871 * to another object) because TextView handles its own key presses. 1872 * 1873 * <p>The default implementation handles KEYCODE_BACK to stop the activity 1874 * and go back. 1875 * 1876 * @return Return <code>true</code> to prevent this event from being propagated 1877 * further, or <code>false</code> to indicate that you have not handled 1878 * this event and it should continue to be propagated. 1879 * @see #onKeyDown 1880 * @see KeyEvent 1881 */ 1882 public boolean onKeyUp(int keyCode, KeyEvent event) { 1883 if (getApplicationInfo().targetSdkVersion 1884 >= Build.VERSION_CODES.ECLAIR) { 1885 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 1886 && !event.isCanceled()) { 1887 onBackPressed(); 1888 return true; 1889 } 1890 } 1891 return false; 1892 } 1893 1894 /** 1895 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 1896 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 1897 * the event). 1898 */ 1899 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 1900 return false; 1901 } 1902 1903 /** 1904 * Called when the activity has detected the user's press of the back 1905 * key. The default implementation simply finishes the current activity, 1906 * but you can override this to do whatever you want. 1907 */ 1908 public void onBackPressed() { 1909 finish(); 1910 } 1911 1912 /** 1913 * Called when a touch screen event was not handled by any of the views 1914 * under it. This is most useful to process touch events that happen 1915 * outside of your window bounds, where there is no view to receive it. 1916 * 1917 * @param event The touch screen event being processed. 1918 * 1919 * @return Return true if you have consumed the event, false if you haven't. 1920 * The default implementation always returns false. 1921 */ 1922 public boolean onTouchEvent(MotionEvent event) { 1923 return false; 1924 } 1925 1926 /** 1927 * Called when the trackball was moved and not handled by any of the 1928 * views inside of the activity. So, for example, if the trackball moves 1929 * while focus is on a button, you will receive a call here because 1930 * buttons do not normally do anything with trackball events. The call 1931 * here happens <em>before</em> trackball movements are converted to 1932 * DPAD key events, which then get sent back to the view hierarchy, and 1933 * will be processed at the point for things like focus navigation. 1934 * 1935 * @param event The trackball event being processed. 1936 * 1937 * @return Return true if you have consumed the event, false if you haven't. 1938 * The default implementation always returns false. 1939 */ 1940 public boolean onTrackballEvent(MotionEvent event) { 1941 return false; 1942 } 1943 1944 /** 1945 * Called whenever a key, touch, or trackball event is dispatched to the 1946 * activity. Implement this method if you wish to know that the user has 1947 * interacted with the device in some way while your activity is running. 1948 * This callback and {@link #onUserLeaveHint} are intended to help 1949 * activities manage status bar notifications intelligently; specifically, 1950 * for helping activities determine the proper time to cancel a notfication. 1951 * 1952 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 1953 * be accompanied by calls to {@link #onUserInteraction}. This 1954 * ensures that your activity will be told of relevant user activity such 1955 * as pulling down the notification pane and touching an item there. 1956 * 1957 * <p>Note that this callback will be invoked for the touch down action 1958 * that begins a touch gesture, but may not be invoked for the touch-moved 1959 * and touch-up actions that follow. 1960 * 1961 * @see #onUserLeaveHint() 1962 */ 1963 public void onUserInteraction() { 1964 } 1965 1966 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 1967 // Update window manager if: we have a view, that view is 1968 // attached to its parent (which will be a RootView), and 1969 // this activity is not embedded. 1970 if (mParent == null) { 1971 View decor = mDecor; 1972 if (decor != null && decor.getParent() != null) { 1973 getWindowManager().updateViewLayout(decor, params); 1974 } 1975 } 1976 } 1977 1978 public void onContentChanged() { 1979 } 1980 1981 /** 1982 * Called when the current {@link Window} of the activity gains or loses 1983 * focus. This is the best indicator of whether this activity is visible 1984 * to the user. The default implementation clears the key tracking 1985 * state, so should always be called. 1986 * 1987 * <p>Note that this provides information about global focus state, which 1988 * is managed independently of activity lifecycles. As such, while focus 1989 * changes will generally have some relation to lifecycle changes (an 1990 * activity that is stopped will not generally get window focus), you 1991 * should not rely on any particular order between the callbacks here and 1992 * those in the other lifecycle methods such as {@link #onResume}. 1993 * 1994 * <p>As a general rule, however, a resumed activity will have window 1995 * focus... unless it has displayed other dialogs or popups that take 1996 * input focus, in which case the activity itself will not have focus 1997 * when the other windows have it. Likewise, the system may display 1998 * system-level windows (such as the status bar notification panel or 1999 * a system alert) which will temporarily take window input focus without 2000 * pausing the foreground activity. 2001 * 2002 * @param hasFocus Whether the window of this activity has focus. 2003 * 2004 * @see #hasWindowFocus() 2005 * @see #onResume 2006 * @see View#onWindowFocusChanged(boolean) 2007 */ 2008 public void onWindowFocusChanged(boolean hasFocus) { 2009 } 2010 2011 /** 2012 * Called when the main window associated with the activity has been 2013 * attached to the window manager. 2014 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2015 * for more information. 2016 * @see View#onAttachedToWindow 2017 */ 2018 public void onAttachedToWindow() { 2019 } 2020 2021 /** 2022 * Called when the main window associated with the activity has been 2023 * detached from the window manager. 2024 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2025 * for more information. 2026 * @see View#onDetachedFromWindow 2027 */ 2028 public void onDetachedFromWindow() { 2029 } 2030 2031 /** 2032 * Returns true if this activity's <em>main</em> window currently has window focus. 2033 * Note that this is not the same as the view itself having focus. 2034 * 2035 * @return True if this activity's main window currently has window focus. 2036 * 2037 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2038 */ 2039 public boolean hasWindowFocus() { 2040 Window w = getWindow(); 2041 if (w != null) { 2042 View d = w.getDecorView(); 2043 if (d != null) { 2044 return d.hasWindowFocus(); 2045 } 2046 } 2047 return false; 2048 } 2049 2050 /** 2051 * Called to process key events. You can override this to intercept all 2052 * key events before they are dispatched to the window. Be sure to call 2053 * this implementation for key events that should be handled normally. 2054 * 2055 * @param event The key event. 2056 * 2057 * @return boolean Return true if this event was consumed. 2058 */ 2059 public boolean dispatchKeyEvent(KeyEvent event) { 2060 onUserInteraction(); 2061 Window win = getWindow(); 2062 if (win.superDispatchKeyEvent(event)) { 2063 return true; 2064 } 2065 View decor = mDecor; 2066 if (decor == null) decor = win.getDecorView(); 2067 return event.dispatch(this, decor != null 2068 ? decor.getKeyDispatcherState() : null, this); 2069 } 2070 2071 /** 2072 * Called to process touch screen events. You can override this to 2073 * intercept all touch screen events before they are dispatched to the 2074 * window. Be sure to call this implementation for touch screen events 2075 * that should be handled normally. 2076 * 2077 * @param ev The touch screen event. 2078 * 2079 * @return boolean Return true if this event was consumed. 2080 */ 2081 public boolean dispatchTouchEvent(MotionEvent ev) { 2082 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2083 onUserInteraction(); 2084 } 2085 if (getWindow().superDispatchTouchEvent(ev)) { 2086 return true; 2087 } 2088 return onTouchEvent(ev); 2089 } 2090 2091 /** 2092 * Called to process trackball events. You can override this to 2093 * intercept all trackball events before they are dispatched to the 2094 * window. Be sure to call this implementation for trackball events 2095 * that should be handled normally. 2096 * 2097 * @param ev The trackball event. 2098 * 2099 * @return boolean Return true if this event was consumed. 2100 */ 2101 public boolean dispatchTrackballEvent(MotionEvent ev) { 2102 onUserInteraction(); 2103 if (getWindow().superDispatchTrackballEvent(ev)) { 2104 return true; 2105 } 2106 return onTrackballEvent(ev); 2107 } 2108 2109 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2110 event.setClassName(getClass().getName()); 2111 event.setPackageName(getPackageName()); 2112 2113 LayoutParams params = getWindow().getAttributes(); 2114 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2115 (params.height == LayoutParams.MATCH_PARENT); 2116 event.setFullScreen(isFullScreen); 2117 2118 CharSequence title = getTitle(); 2119 if (!TextUtils.isEmpty(title)) { 2120 event.getText().add(title); 2121 } 2122 2123 return true; 2124 } 2125 2126 /** 2127 * Default implementation of 2128 * {@link android.view.Window.Callback#onCreatePanelView} 2129 * for activities. This 2130 * simply returns null so that all panel sub-windows will have the default 2131 * menu behavior. 2132 */ 2133 public View onCreatePanelView(int featureId) { 2134 return null; 2135 } 2136 2137 /** 2138 * Default implementation of 2139 * {@link android.view.Window.Callback#onCreatePanelMenu} 2140 * for activities. This calls through to the new 2141 * {@link #onCreateOptionsMenu} method for the 2142 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2143 * so that subclasses of Activity don't need to deal with feature codes. 2144 */ 2145 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2146 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2147 return onCreateOptionsMenu(menu); 2148 } 2149 return false; 2150 } 2151 2152 /** 2153 * Default implementation of 2154 * {@link android.view.Window.Callback#onPreparePanel} 2155 * for activities. This 2156 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2157 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2158 * panel, so that subclasses of 2159 * Activity don't need to deal with feature codes. 2160 */ 2161 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2162 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2163 boolean goforit = onPrepareOptionsMenu(menu); 2164 return goforit && menu.hasVisibleItems(); 2165 } 2166 return true; 2167 } 2168 2169 /** 2170 * {@inheritDoc} 2171 * 2172 * @return The default implementation returns true. 2173 */ 2174 public boolean onMenuOpened(int featureId, Menu menu) { 2175 return true; 2176 } 2177 2178 /** 2179 * Default implementation of 2180 * {@link android.view.Window.Callback#onMenuItemSelected} 2181 * for activities. This calls through to the new 2182 * {@link #onOptionsItemSelected} method for the 2183 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2184 * panel, so that subclasses of 2185 * Activity don't need to deal with feature codes. 2186 */ 2187 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2188 switch (featureId) { 2189 case Window.FEATURE_OPTIONS_PANEL: 2190 // Put event logging here so it gets called even if subclass 2191 // doesn't call through to superclass's implmeentation of each 2192 // of these methods below 2193 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2194 return onOptionsItemSelected(item); 2195 2196 case Window.FEATURE_CONTEXT_MENU: 2197 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2198 return onContextItemSelected(item); 2199 2200 default: 2201 return false; 2202 } 2203 } 2204 2205 /** 2206 * Default implementation of 2207 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2208 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2209 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2210 * so that subclasses of Activity don't need to deal with feature codes. 2211 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2212 * {@link #onContextMenuClosed(Menu)} will be called. 2213 */ 2214 public void onPanelClosed(int featureId, Menu menu) { 2215 switch (featureId) { 2216 case Window.FEATURE_OPTIONS_PANEL: 2217 onOptionsMenuClosed(menu); 2218 break; 2219 2220 case Window.FEATURE_CONTEXT_MENU: 2221 onContextMenuClosed(menu); 2222 break; 2223 } 2224 } 2225 2226 /** 2227 * Initialize the contents of the Activity's standard options menu. You 2228 * should place your menu items in to <var>menu</var>. 2229 * 2230 * <p>This is only called once, the first time the options menu is 2231 * displayed. To update the menu every time it is displayed, see 2232 * {@link #onPrepareOptionsMenu}. 2233 * 2234 * <p>The default implementation populates the menu with standard system 2235 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2236 * they will be correctly ordered with application-defined menu items. 2237 * Deriving classes should always call through to the base implementation. 2238 * 2239 * <p>You can safely hold on to <var>menu</var> (and any items created 2240 * from it), making modifications to it as desired, until the next 2241 * time onCreateOptionsMenu() is called. 2242 * 2243 * <p>When you add items to the menu, you can implement the Activity's 2244 * {@link #onOptionsItemSelected} method to handle them there. 2245 * 2246 * @param menu The options menu in which you place your items. 2247 * 2248 * @return You must return true for the menu to be displayed; 2249 * if you return false it will not be shown. 2250 * 2251 * @see #onPrepareOptionsMenu 2252 * @see #onOptionsItemSelected 2253 */ 2254 public boolean onCreateOptionsMenu(Menu menu) { 2255 if (mParent != null) { 2256 return mParent.onCreateOptionsMenu(menu); 2257 } 2258 return true; 2259 } 2260 2261 /** 2262 * Prepare the Screen's standard options menu to be displayed. This is 2263 * called right before the menu is shown, every time it is shown. You can 2264 * use this method to efficiently enable/disable items or otherwise 2265 * dynamically modify the contents. 2266 * 2267 * <p>The default implementation updates the system menu items based on the 2268 * activity's state. Deriving classes should always call through to the 2269 * base class implementation. 2270 * 2271 * @param menu The options menu as last shown or first initialized by 2272 * onCreateOptionsMenu(). 2273 * 2274 * @return You must return true for the menu to be displayed; 2275 * if you return false it will not be shown. 2276 * 2277 * @see #onCreateOptionsMenu 2278 */ 2279 public boolean onPrepareOptionsMenu(Menu menu) { 2280 if (mParent != null) { 2281 return mParent.onPrepareOptionsMenu(menu); 2282 } 2283 return true; 2284 } 2285 2286 /** 2287 * This hook is called whenever an item in your options menu is selected. 2288 * The default implementation simply returns false to have the normal 2289 * processing happen (calling the item's Runnable or sending a message to 2290 * its Handler as appropriate). You can use this method for any items 2291 * for which you would like to do processing without those other 2292 * facilities. 2293 * 2294 * <p>Derived classes should call through to the base class for it to 2295 * perform the default menu handling. 2296 * 2297 * @param item The menu item that was selected. 2298 * 2299 * @return boolean Return false to allow normal menu processing to 2300 * proceed, true to consume it here. 2301 * 2302 * @see #onCreateOptionsMenu 2303 */ 2304 public boolean onOptionsItemSelected(MenuItem item) { 2305 if (mParent != null) { 2306 return mParent.onOptionsItemSelected(item); 2307 } 2308 return false; 2309 } 2310 2311 /** 2312 * This hook is called whenever the options menu is being closed (either by the user canceling 2313 * the menu with the back/menu button, or when an item is selected). 2314 * 2315 * @param menu The options menu as last shown or first initialized by 2316 * onCreateOptionsMenu(). 2317 */ 2318 public void onOptionsMenuClosed(Menu menu) { 2319 if (mParent != null) { 2320 mParent.onOptionsMenuClosed(menu); 2321 } 2322 } 2323 2324 /** 2325 * Programmatically opens the options menu. If the options menu is already 2326 * open, this method does nothing. 2327 */ 2328 public void openOptionsMenu() { 2329 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2330 } 2331 2332 /** 2333 * Progammatically closes the options menu. If the options menu is already 2334 * closed, this method does nothing. 2335 */ 2336 public void closeOptionsMenu() { 2337 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2338 } 2339 2340 /** 2341 * Called when a context menu for the {@code view} is about to be shown. 2342 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2343 * time the context menu is about to be shown and should be populated for 2344 * the view (or item inside the view for {@link AdapterView} subclasses, 2345 * this can be found in the {@code menuInfo})). 2346 * <p> 2347 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2348 * item has been selected. 2349 * <p> 2350 * It is not safe to hold onto the context menu after this method returns. 2351 * {@inheritDoc} 2352 */ 2353 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2354 } 2355 2356 /** 2357 * Registers a context menu to be shown for the given view (multiple views 2358 * can show the context menu). This method will set the 2359 * {@link OnCreateContextMenuListener} on the view to this activity, so 2360 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2361 * called when it is time to show the context menu. 2362 * 2363 * @see #unregisterForContextMenu(View) 2364 * @param view The view that should show a context menu. 2365 */ 2366 public void registerForContextMenu(View view) { 2367 view.setOnCreateContextMenuListener(this); 2368 } 2369 2370 /** 2371 * Prevents a context menu to be shown for the given view. This method will remove the 2372 * {@link OnCreateContextMenuListener} on the view. 2373 * 2374 * @see #registerForContextMenu(View) 2375 * @param view The view that should stop showing a context menu. 2376 */ 2377 public void unregisterForContextMenu(View view) { 2378 view.setOnCreateContextMenuListener(null); 2379 } 2380 2381 /** 2382 * Programmatically opens the context menu for a particular {@code view}. 2383 * The {@code view} should have been added via 2384 * {@link #registerForContextMenu(View)}. 2385 * 2386 * @param view The view to show the context menu for. 2387 */ 2388 public void openContextMenu(View view) { 2389 view.showContextMenu(); 2390 } 2391 2392 /** 2393 * Programmatically closes the most recently opened context menu, if showing. 2394 */ 2395 public void closeContextMenu() { 2396 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2397 } 2398 2399 /** 2400 * This hook is called whenever an item in a context menu is selected. The 2401 * default implementation simply returns false to have the normal processing 2402 * happen (calling the item's Runnable or sending a message to its Handler 2403 * as appropriate). You can use this method for any items for which you 2404 * would like to do processing without those other facilities. 2405 * <p> 2406 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2407 * View that added this menu item. 2408 * <p> 2409 * Derived classes should call through to the base class for it to perform 2410 * the default menu handling. 2411 * 2412 * @param item The context menu item that was selected. 2413 * @return boolean Return false to allow normal context menu processing to 2414 * proceed, true to consume it here. 2415 */ 2416 public boolean onContextItemSelected(MenuItem item) { 2417 if (mParent != null) { 2418 return mParent.onContextItemSelected(item); 2419 } 2420 return false; 2421 } 2422 2423 /** 2424 * This hook is called whenever the context menu is being closed (either by 2425 * the user canceling the menu with the back/menu button, or when an item is 2426 * selected). 2427 * 2428 * @param menu The context menu that is being closed. 2429 */ 2430 public void onContextMenuClosed(Menu menu) { 2431 if (mParent != null) { 2432 mParent.onContextMenuClosed(menu); 2433 } 2434 } 2435 2436 /** 2437 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2438 */ 2439 @Deprecated 2440 protected Dialog onCreateDialog(int id) { 2441 return null; 2442 } 2443 2444 /** 2445 * Callback for creating dialogs that are managed (saved and restored) for you 2446 * by the activity. The default implementation calls through to 2447 * {@link #onCreateDialog(int)} for compatibility. 2448 * 2449 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2450 * this method the first time, and hang onto it thereafter. Any dialog 2451 * that is created by this method will automatically be saved and restored 2452 * for you, including whether it is showing. 2453 * 2454 * <p>If you would like the activity to manage saving and restoring dialogs 2455 * for you, you should override this method and handle any ids that are 2456 * passed to {@link #showDialog}. 2457 * 2458 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2459 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2460 * 2461 * @param id The id of the dialog. 2462 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2463 * @return The dialog. If you return null, the dialog will not be created. 2464 * 2465 * @see #onPrepareDialog(int, Dialog, Bundle) 2466 * @see #showDialog(int, Bundle) 2467 * @see #dismissDialog(int) 2468 * @see #removeDialog(int) 2469 */ 2470 protected Dialog onCreateDialog(int id, Bundle args) { 2471 return onCreateDialog(id); 2472 } 2473 2474 /** 2475 * @deprecated Old no-arguments version of 2476 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2477 */ 2478 @Deprecated 2479 protected void onPrepareDialog(int id, Dialog dialog) { 2480 dialog.setOwnerActivity(this); 2481 } 2482 2483 /** 2484 * Provides an opportunity to prepare a managed dialog before it is being 2485 * shown. The default implementation calls through to 2486 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2487 * 2488 * <p> 2489 * Override this if you need to update a managed dialog based on the state 2490 * of the application each time it is shown. For example, a time picker 2491 * dialog might want to be updated with the current time. You should call 2492 * through to the superclass's implementation. The default implementation 2493 * will set this Activity as the owner activity on the Dialog. 2494 * 2495 * @param id The id of the managed dialog. 2496 * @param dialog The dialog. 2497 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2498 * @see #onCreateDialog(int, Bundle) 2499 * @see #showDialog(int) 2500 * @see #dismissDialog(int) 2501 * @see #removeDialog(int) 2502 */ 2503 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 2504 onPrepareDialog(id, dialog); 2505 } 2506 2507 /** 2508 * Simple version of {@link #showDialog(int, Bundle)} that does not 2509 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 2510 * with null arguments. 2511 */ 2512 public final void showDialog(int id) { 2513 showDialog(id, null); 2514 } 2515 2516 /** 2517 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 2518 * will be made with the same id the first time this is called for a given 2519 * id. From thereafter, the dialog will be automatically saved and restored. 2520 * 2521 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 2522 * be made to provide an opportunity to do any timely preparation. 2523 * 2524 * @param id The id of the managed dialog. 2525 * @param args Arguments to pass through to the dialog. These will be saved 2526 * and restored for you. Note that if the dialog is already created, 2527 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 2528 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 2529 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 2530 * @return Returns true if the Dialog was created; false is returned if 2531 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 2532 * 2533 * @see Dialog 2534 * @see #onCreateDialog(int, Bundle) 2535 * @see #onPrepareDialog(int, Dialog, Bundle) 2536 * @see #dismissDialog(int) 2537 * @see #removeDialog(int) 2538 */ 2539 public final boolean showDialog(int id, Bundle args) { 2540 if (mManagedDialogs == null) { 2541 mManagedDialogs = new SparseArray<ManagedDialog>(); 2542 } 2543 ManagedDialog md = mManagedDialogs.get(id); 2544 if (md == null) { 2545 md = new ManagedDialog(); 2546 md.mDialog = createDialog(id, null, args); 2547 if (md.mDialog == null) { 2548 return false; 2549 } 2550 mManagedDialogs.put(id, md); 2551 } 2552 2553 md.mArgs = args; 2554 onPrepareDialog(id, md.mDialog, args); 2555 md.mDialog.show(); 2556 return true; 2557 } 2558 2559 /** 2560 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 2561 * 2562 * @param id The id of the managed dialog. 2563 * 2564 * @throws IllegalArgumentException if the id was not previously shown via 2565 * {@link #showDialog(int)}. 2566 * 2567 * @see #onCreateDialog(int, Bundle) 2568 * @see #onPrepareDialog(int, Dialog, Bundle) 2569 * @see #showDialog(int) 2570 * @see #removeDialog(int) 2571 */ 2572 public final void dismissDialog(int id) { 2573 if (mManagedDialogs == null) { 2574 throw missingDialog(id); 2575 } 2576 2577 final ManagedDialog md = mManagedDialogs.get(id); 2578 if (md == null) { 2579 throw missingDialog(id); 2580 } 2581 md.mDialog.dismiss(); 2582 } 2583 2584 /** 2585 * Creates an exception to throw if a user passed in a dialog id that is 2586 * unexpected. 2587 */ 2588 private IllegalArgumentException missingDialog(int id) { 2589 return new IllegalArgumentException("no dialog with id " + id + " was ever " 2590 + "shown via Activity#showDialog"); 2591 } 2592 2593 /** 2594 * Removes any internal references to a dialog managed by this Activity. 2595 * If the dialog is showing, it will dismiss it as part of the clean up. 2596 * 2597 * <p>This can be useful if you know that you will never show a dialog again and 2598 * want to avoid the overhead of saving and restoring it in the future. 2599 * 2600 * @param id The id of the managed dialog. 2601 * 2602 * @see #onCreateDialog(int, Bundle) 2603 * @see #onPrepareDialog(int, Dialog, Bundle) 2604 * @see #showDialog(int) 2605 * @see #dismissDialog(int) 2606 */ 2607 public final void removeDialog(int id) { 2608 if (mManagedDialogs == null) { 2609 return; 2610 } 2611 2612 final ManagedDialog md = mManagedDialogs.get(id); 2613 if (md == null) { 2614 return; 2615 } 2616 2617 md.mDialog.dismiss(); 2618 mManagedDialogs.remove(id); 2619 } 2620 2621 /** 2622 * This hook is called when the user signals the desire to start a search. 2623 * 2624 * <p>You can use this function as a simple way to launch the search UI, in response to a 2625 * menu item, search button, or other widgets within your activity. Unless overidden, 2626 * calling this function is the same as calling 2627 * {@link #startSearch startSearch(null, false, null, false)}, which launches 2628 * search for the current activity as specified in its manifest, see {@link SearchManager}. 2629 * 2630 * <p>You can override this function to force global search, e.g. in response to a dedicated 2631 * search key, or to block search entirely (by simply returning false). 2632 * 2633 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 2634 * The default implementation always returns {@code true}. 2635 * 2636 * @see android.app.SearchManager 2637 */ 2638 public boolean onSearchRequested() { 2639 startSearch(null, false, null, false); 2640 return true; 2641 } 2642 2643 /** 2644 * This hook is called to launch the search UI. 2645 * 2646 * <p>It is typically called from onSearchRequested(), either directly from 2647 * Activity.onSearchRequested() or from an overridden version in any given 2648 * Activity. If your goal is simply to activate search, it is preferred to call 2649 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 2650 * is to inject specific data such as context data, it is preferred to <i>override</i> 2651 * onSearchRequested(), so that any callers to it will benefit from the override. 2652 * 2653 * @param initialQuery Any non-null non-empty string will be inserted as 2654 * pre-entered text in the search query box. 2655 * @param selectInitialQuery If true, the intial query will be preselected, which means that 2656 * any further typing will replace it. This is useful for cases where an entire pre-formed 2657 * query is being inserted. If false, the selection point will be placed at the end of the 2658 * inserted query. This is useful when the inserted query is text that the user entered, 2659 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 2660 * if initialQuery is a non-empty string.</i> 2661 * @param appSearchData An application can insert application-specific 2662 * context here, in order to improve quality or specificity of its own 2663 * searches. This data will be returned with SEARCH intent(s). Null if 2664 * no extra data is required. 2665 * @param globalSearch If false, this will only launch the search that has been specifically 2666 * defined by the application (which is usually defined as a local search). If no default 2667 * search is defined in the current application or activity, global search will be launched. 2668 * If true, this will always launch a platform-global (e.g. web-based) search instead. 2669 * 2670 * @see android.app.SearchManager 2671 * @see #onSearchRequested 2672 */ 2673 public void startSearch(String initialQuery, boolean selectInitialQuery, 2674 Bundle appSearchData, boolean globalSearch) { 2675 ensureSearchManager(); 2676 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 2677 appSearchData, globalSearch); 2678 } 2679 2680 /** 2681 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 2682 * the search dialog. Made available for testing purposes. 2683 * 2684 * @param query The query to trigger. If empty, the request will be ignored. 2685 * @param appSearchData An application can insert application-specific 2686 * context here, in order to improve quality or specificity of its own 2687 * searches. This data will be returned with SEARCH intent(s). Null if 2688 * no extra data is required. 2689 */ 2690 public void triggerSearch(String query, Bundle appSearchData) { 2691 ensureSearchManager(); 2692 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 2693 } 2694 2695 /** 2696 * Request that key events come to this activity. Use this if your 2697 * activity has no views with focus, but the activity still wants 2698 * a chance to process key events. 2699 * 2700 * @see android.view.Window#takeKeyEvents 2701 */ 2702 public void takeKeyEvents(boolean get) { 2703 getWindow().takeKeyEvents(get); 2704 } 2705 2706 /** 2707 * Enable extended window features. This is a convenience for calling 2708 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 2709 * 2710 * @param featureId The desired feature as defined in 2711 * {@link android.view.Window}. 2712 * @return Returns true if the requested feature is supported and now 2713 * enabled. 2714 * 2715 * @see android.view.Window#requestFeature 2716 */ 2717 public final boolean requestWindowFeature(int featureId) { 2718 return getWindow().requestFeature(featureId); 2719 } 2720 2721 /** 2722 * Convenience for calling 2723 * {@link android.view.Window#setFeatureDrawableResource}. 2724 */ 2725 public final void setFeatureDrawableResource(int featureId, int resId) { 2726 getWindow().setFeatureDrawableResource(featureId, resId); 2727 } 2728 2729 /** 2730 * Convenience for calling 2731 * {@link android.view.Window#setFeatureDrawableUri}. 2732 */ 2733 public final void setFeatureDrawableUri(int featureId, Uri uri) { 2734 getWindow().setFeatureDrawableUri(featureId, uri); 2735 } 2736 2737 /** 2738 * Convenience for calling 2739 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 2740 */ 2741 public final void setFeatureDrawable(int featureId, Drawable drawable) { 2742 getWindow().setFeatureDrawable(featureId, drawable); 2743 } 2744 2745 /** 2746 * Convenience for calling 2747 * {@link android.view.Window#setFeatureDrawableAlpha}. 2748 */ 2749 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 2750 getWindow().setFeatureDrawableAlpha(featureId, alpha); 2751 } 2752 2753 /** 2754 * Convenience for calling 2755 * {@link android.view.Window#getLayoutInflater}. 2756 */ 2757 public LayoutInflater getLayoutInflater() { 2758 return getWindow().getLayoutInflater(); 2759 } 2760 2761 /** 2762 * Returns a {@link MenuInflater} with this context. 2763 */ 2764 public MenuInflater getMenuInflater() { 2765 return new MenuInflater(this); 2766 } 2767 2768 @Override 2769 protected void onApplyThemeResource(Resources.Theme theme, int resid, 2770 boolean first) { 2771 if (mParent == null) { 2772 super.onApplyThemeResource(theme, resid, first); 2773 } else { 2774 try { 2775 theme.setTo(mParent.getTheme()); 2776 } catch (Exception e) { 2777 // Empty 2778 } 2779 theme.applyStyle(resid, false); 2780 } 2781 } 2782 2783 /** 2784 * Launch an activity for which you would like a result when it finished. 2785 * When this activity exits, your 2786 * onActivityResult() method will be called with the given requestCode. 2787 * Using a negative requestCode is the same as calling 2788 * {@link #startActivity} (the activity is not launched as a sub-activity). 2789 * 2790 * <p>Note that this method should only be used with Intent protocols 2791 * that are defined to return a result. In other protocols (such as 2792 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 2793 * not get the result when you expect. For example, if the activity you 2794 * are launching uses the singleTask launch mode, it will not run in your 2795 * task and thus you will immediately receive a cancel result. 2796 * 2797 * <p>As a special case, if you call startActivityForResult() with a requestCode 2798 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 2799 * activity, then your window will not be displayed until a result is 2800 * returned back from the started activity. This is to avoid visible 2801 * flickering when redirecting to another activity. 2802 * 2803 * <p>This method throws {@link android.content.ActivityNotFoundException} 2804 * if there was no Activity found to run the given Intent. 2805 * 2806 * @param intent The intent to start. 2807 * @param requestCode If >= 0, this code will be returned in 2808 * onActivityResult() when the activity exits. 2809 * 2810 * @throws android.content.ActivityNotFoundException 2811 * 2812 * @see #startActivity 2813 */ 2814 public void startActivityForResult(Intent intent, int requestCode) { 2815 if (mParent == null) { 2816 Instrumentation.ActivityResult ar = 2817 mInstrumentation.execStartActivity( 2818 this, mMainThread.getApplicationThread(), mToken, this, 2819 intent, requestCode); 2820 if (ar != null) { 2821 mMainThread.sendActivityResult( 2822 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 2823 ar.getResultData()); 2824 } 2825 if (requestCode >= 0) { 2826 // If this start is requesting a result, we can avoid making 2827 // the activity visible until the result is received. Setting 2828 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 2829 // activity hidden during this time, to avoid flickering. 2830 // This can only be done when a result is requested because 2831 // that guarantees we will get information back when the 2832 // activity is finished, no matter what happens to it. 2833 mStartedActivity = true; 2834 } 2835 } else { 2836 mParent.startActivityFromChild(this, intent, requestCode); 2837 } 2838 } 2839 2840 /** 2841 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 2842 * to use a IntentSender to describe the activity to be started. If 2843 * the IntentSender is for an activity, that activity will be started 2844 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 2845 * here; otherwise, its associated action will be executed (such as 2846 * sending a broadcast) as if you had called 2847 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 2848 * 2849 * @param intent The IntentSender to launch. 2850 * @param requestCode If >= 0, this code will be returned in 2851 * onActivityResult() when the activity exits. 2852 * @param fillInIntent If non-null, this will be provided as the 2853 * intent parameter to {@link IntentSender#sendIntent}. 2854 * @param flagsMask Intent flags in the original IntentSender that you 2855 * would like to change. 2856 * @param flagsValues Desired values for any bits set in 2857 * <var>flagsMask</var> 2858 * @param extraFlags Always set to 0. 2859 */ 2860 public void startIntentSenderForResult(IntentSender intent, int requestCode, 2861 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 2862 throws IntentSender.SendIntentException { 2863 if (mParent == null) { 2864 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 2865 flagsMask, flagsValues, this); 2866 } else { 2867 mParent.startIntentSenderFromChild(this, intent, requestCode, 2868 fillInIntent, flagsMask, flagsValues, extraFlags); 2869 } 2870 } 2871 2872 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 2873 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity) 2874 throws IntentSender.SendIntentException { 2875 try { 2876 String resolvedType = null; 2877 if (fillInIntent != null) { 2878 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 2879 } 2880 int result = ActivityManagerNative.getDefault() 2881 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 2882 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 2883 requestCode, flagsMask, flagsValues); 2884 if (result == IActivityManager.START_CANCELED) { 2885 throw new IntentSender.SendIntentException(); 2886 } 2887 Instrumentation.checkStartActivityResult(result, null); 2888 } catch (RemoteException e) { 2889 } 2890 if (requestCode >= 0) { 2891 // If this start is requesting a result, we can avoid making 2892 // the activity visible until the result is received. Setting 2893 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 2894 // activity hidden during this time, to avoid flickering. 2895 // This can only be done when a result is requested because 2896 // that guarantees we will get information back when the 2897 // activity is finished, no matter what happens to it. 2898 mStartedActivity = true; 2899 } 2900 } 2901 2902 /** 2903 * Launch a new activity. You will not receive any information about when 2904 * the activity exits. This implementation overrides the base version, 2905 * providing information about 2906 * the activity performing the launch. Because of this additional 2907 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 2908 * required; if not specified, the new activity will be added to the 2909 * task of the caller. 2910 * 2911 * <p>This method throws {@link android.content.ActivityNotFoundException} 2912 * if there was no Activity found to run the given Intent. 2913 * 2914 * @param intent The intent to start. 2915 * 2916 * @throws android.content.ActivityNotFoundException 2917 * 2918 * @see #startActivityForResult 2919 */ 2920 @Override 2921 public void startActivity(Intent intent) { 2922 startActivityForResult(intent, -1); 2923 } 2924 2925 /** 2926 * Like {@link #startActivity(Intent)}, but taking a IntentSender 2927 * to start; see 2928 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 2929 * for more information. 2930 * 2931 * @param intent The IntentSender to launch. 2932 * @param fillInIntent If non-null, this will be provided as the 2933 * intent parameter to {@link IntentSender#sendIntent}. 2934 * @param flagsMask Intent flags in the original IntentSender that you 2935 * would like to change. 2936 * @param flagsValues Desired values for any bits set in 2937 * <var>flagsMask</var> 2938 * @param extraFlags Always set to 0. 2939 */ 2940 public void startIntentSender(IntentSender intent, 2941 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 2942 throws IntentSender.SendIntentException { 2943 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 2944 flagsValues, extraFlags); 2945 } 2946 2947 /** 2948 * A special variation to launch an activity only if a new activity 2949 * instance is needed to handle the given Intent. In other words, this is 2950 * just like {@link #startActivityForResult(Intent, int)} except: if you are 2951 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 2952 * singleTask or singleTop 2953 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 2954 * and the activity 2955 * that handles <var>intent</var> is the same as your currently running 2956 * activity, then a new instance is not needed. In this case, instead of 2957 * the normal behavior of calling {@link #onNewIntent} this function will 2958 * return and you can handle the Intent yourself. 2959 * 2960 * <p>This function can only be called from a top-level activity; if it is 2961 * called from a child activity, a runtime exception will be thrown. 2962 * 2963 * @param intent The intent to start. 2964 * @param requestCode If >= 0, this code will be returned in 2965 * onActivityResult() when the activity exits, as described in 2966 * {@link #startActivityForResult}. 2967 * 2968 * @return If a new activity was launched then true is returned; otherwise 2969 * false is returned and you must handle the Intent yourself. 2970 * 2971 * @see #startActivity 2972 * @see #startActivityForResult 2973 */ 2974 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 2975 if (mParent == null) { 2976 int result = IActivityManager.START_RETURN_INTENT_TO_CALLER; 2977 try { 2978 result = ActivityManagerNative.getDefault() 2979 .startActivity(mMainThread.getApplicationThread(), 2980 intent, intent.resolveTypeIfNeeded( 2981 getContentResolver()), 2982 null, 0, 2983 mToken, mEmbeddedID, requestCode, true, false); 2984 } catch (RemoteException e) { 2985 // Empty 2986 } 2987 2988 Instrumentation.checkStartActivityResult(result, intent); 2989 2990 if (requestCode >= 0) { 2991 // If this start is requesting a result, we can avoid making 2992 // the activity visible until the result is received. Setting 2993 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 2994 // activity hidden during this time, to avoid flickering. 2995 // This can only be done when a result is requested because 2996 // that guarantees we will get information back when the 2997 // activity is finished, no matter what happens to it. 2998 mStartedActivity = true; 2999 } 3000 return result != IActivityManager.START_RETURN_INTENT_TO_CALLER; 3001 } 3002 3003 throw new UnsupportedOperationException( 3004 "startActivityIfNeeded can only be called from a top-level activity"); 3005 } 3006 3007 /** 3008 * Special version of starting an activity, for use when you are replacing 3009 * other activity components. You can use this to hand the Intent off 3010 * to the next Activity that can handle it. You typically call this in 3011 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3012 * 3013 * @param intent The intent to dispatch to the next activity. For 3014 * correct behavior, this must be the same as the Intent that started 3015 * your own activity; the only changes you can make are to the extras 3016 * inside of it. 3017 * 3018 * @return Returns a boolean indicating whether there was another Activity 3019 * to start: true if there was a next activity to start, false if there 3020 * wasn't. In general, if true is returned you will then want to call 3021 * finish() on yourself. 3022 */ 3023 public boolean startNextMatchingActivity(Intent intent) { 3024 if (mParent == null) { 3025 try { 3026 return ActivityManagerNative.getDefault() 3027 .startNextMatchingActivity(mToken, intent); 3028 } catch (RemoteException e) { 3029 // Empty 3030 } 3031 return false; 3032 } 3033 3034 throw new UnsupportedOperationException( 3035 "startNextMatchingActivity can only be called from a top-level activity"); 3036 } 3037 3038 /** 3039 * This is called when a child activity of this one calls its 3040 * {@link #startActivity} or {@link #startActivityForResult} method. 3041 * 3042 * <p>This method throws {@link android.content.ActivityNotFoundException} 3043 * if there was no Activity found to run the given Intent. 3044 * 3045 * @param child The activity making the call. 3046 * @param intent The intent to start. 3047 * @param requestCode Reply request code. < 0 if reply is not requested. 3048 * 3049 * @throws android.content.ActivityNotFoundException 3050 * 3051 * @see #startActivity 3052 * @see #startActivityForResult 3053 */ 3054 public void startActivityFromChild(Activity child, Intent intent, 3055 int requestCode) { 3056 Instrumentation.ActivityResult ar = 3057 mInstrumentation.execStartActivity( 3058 this, mMainThread.getApplicationThread(), mToken, child, 3059 intent, requestCode); 3060 if (ar != null) { 3061 mMainThread.sendActivityResult( 3062 mToken, child.mEmbeddedID, requestCode, 3063 ar.getResultCode(), ar.getResultData()); 3064 } 3065 } 3066 3067 /** 3068 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3069 * taking a IntentSender; see 3070 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3071 * for more information. 3072 */ 3073 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3074 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3075 int extraFlags) 3076 throws IntentSender.SendIntentException { 3077 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3078 flagsMask, flagsValues, child); 3079 } 3080 3081 /** 3082 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3083 * or {@link #finish} to specify an explicit transition animation to 3084 * perform next. 3085 * @param enterAnim A resource ID of the animation resource to use for 3086 * the incoming activity. Use 0 for no animation. 3087 * @param exitAnim A resource ID of the animation resource to use for 3088 * the outgoing activity. Use 0 for no animation. 3089 */ 3090 public void overridePendingTransition(int enterAnim, int exitAnim) { 3091 try { 3092 ActivityManagerNative.getDefault().overridePendingTransition( 3093 mToken, getPackageName(), enterAnim, exitAnim); 3094 } catch (RemoteException e) { 3095 } 3096 } 3097 3098 /** 3099 * Call this to set the result that your activity will return to its 3100 * caller. 3101 * 3102 * @param resultCode The result code to propagate back to the originating 3103 * activity, often RESULT_CANCELED or RESULT_OK 3104 * 3105 * @see #RESULT_CANCELED 3106 * @see #RESULT_OK 3107 * @see #RESULT_FIRST_USER 3108 * @see #setResult(int, Intent) 3109 */ 3110 public final void setResult(int resultCode) { 3111 synchronized (this) { 3112 mResultCode = resultCode; 3113 mResultData = null; 3114 } 3115 } 3116 3117 /** 3118 * Call this to set the result that your activity will return to its 3119 * caller. 3120 * 3121 * @param resultCode The result code to propagate back to the originating 3122 * activity, often RESULT_CANCELED or RESULT_OK 3123 * @param data The data to propagate back to the originating activity. 3124 * 3125 * @see #RESULT_CANCELED 3126 * @see #RESULT_OK 3127 * @see #RESULT_FIRST_USER 3128 * @see #setResult(int) 3129 */ 3130 public final void setResult(int resultCode, Intent data) { 3131 synchronized (this) { 3132 mResultCode = resultCode; 3133 mResultData = data; 3134 } 3135 } 3136 3137 /** 3138 * Return the name of the package that invoked this activity. This is who 3139 * the data in {@link #setResult setResult()} will be sent to. You can 3140 * use this information to validate that the recipient is allowed to 3141 * receive the data. 3142 * 3143 * <p>Note: if the calling activity is not expecting a result (that is it 3144 * did not use the {@link #startActivityForResult} 3145 * form that includes a request code), then the calling package will be 3146 * null. 3147 * 3148 * @return The package of the activity that will receive your 3149 * reply, or null if none. 3150 */ 3151 public String getCallingPackage() { 3152 try { 3153 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 3154 } catch (RemoteException e) { 3155 return null; 3156 } 3157 } 3158 3159 /** 3160 * Return the name of the activity that invoked this activity. This is 3161 * who the data in {@link #setResult setResult()} will be sent to. You 3162 * can use this information to validate that the recipient is allowed to 3163 * receive the data. 3164 * 3165 * <p>Note: if the calling activity is not expecting a result (that is it 3166 * did not use the {@link #startActivityForResult} 3167 * form that includes a request code), then the calling package will be 3168 * null. 3169 * 3170 * @return String The full name of the activity that will receive your 3171 * reply, or null if none. 3172 */ 3173 public ComponentName getCallingActivity() { 3174 try { 3175 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 3176 } catch (RemoteException e) { 3177 return null; 3178 } 3179 } 3180 3181 /** 3182 * Control whether this activity's main window is visible. This is intended 3183 * only for the special case of an activity that is not going to show a 3184 * UI itself, but can't just finish prior to onResume() because it needs 3185 * to wait for a service binding or such. Setting this to false allows 3186 * you to prevent your UI from being shown during that time. 3187 * 3188 * <p>The default value for this is taken from the 3189 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 3190 */ 3191 public void setVisible(boolean visible) { 3192 if (mVisibleFromClient != visible) { 3193 mVisibleFromClient = visible; 3194 if (mVisibleFromServer) { 3195 if (visible) makeVisible(); 3196 else mDecor.setVisibility(View.INVISIBLE); 3197 } 3198 } 3199 } 3200 3201 void makeVisible() { 3202 if (!mWindowAdded) { 3203 ViewManager wm = getWindowManager(); 3204 wm.addView(mDecor, getWindow().getAttributes()); 3205 mWindowAdded = true; 3206 } 3207 mDecor.setVisibility(View.VISIBLE); 3208 } 3209 3210 /** 3211 * Check to see whether this activity is in the process of finishing, 3212 * either because you called {@link #finish} on it or someone else 3213 * has requested that it finished. This is often used in 3214 * {@link #onPause} to determine whether the activity is simply pausing or 3215 * completely finishing. 3216 * 3217 * @return If the activity is finishing, returns true; else returns false. 3218 * 3219 * @see #finish 3220 */ 3221 public boolean isFinishing() { 3222 return mFinished; 3223 } 3224 3225 /** 3226 * Call this when your activity is done and should be closed. The 3227 * ActivityResult is propagated back to whoever launched you via 3228 * onActivityResult(). 3229 */ 3230 public void finish() { 3231 if (mParent == null) { 3232 int resultCode; 3233 Intent resultData; 3234 synchronized (this) { 3235 resultCode = mResultCode; 3236 resultData = mResultData; 3237 } 3238 if (Config.LOGV) Log.v(TAG, "Finishing self: token=" + mToken); 3239 try { 3240 if (ActivityManagerNative.getDefault() 3241 .finishActivity(mToken, resultCode, resultData)) { 3242 mFinished = true; 3243 } 3244 } catch (RemoteException e) { 3245 // Empty 3246 } 3247 } else { 3248 mParent.finishFromChild(this); 3249 } 3250 } 3251 3252 /** 3253 * This is called when a child activity of this one calls its 3254 * {@link #finish} method. The default implementation simply calls 3255 * finish() on this activity (the parent), finishing the entire group. 3256 * 3257 * @param child The activity making the call. 3258 * 3259 * @see #finish 3260 */ 3261 public void finishFromChild(Activity child) { 3262 finish(); 3263 } 3264 3265 /** 3266 * Force finish another activity that you had previously started with 3267 * {@link #startActivityForResult}. 3268 * 3269 * @param requestCode The request code of the activity that you had 3270 * given to startActivityForResult(). If there are multiple 3271 * activities started with this request code, they 3272 * will all be finished. 3273 */ 3274 public void finishActivity(int requestCode) { 3275 if (mParent == null) { 3276 try { 3277 ActivityManagerNative.getDefault() 3278 .finishSubActivity(mToken, mEmbeddedID, requestCode); 3279 } catch (RemoteException e) { 3280 // Empty 3281 } 3282 } else { 3283 mParent.finishActivityFromChild(this, requestCode); 3284 } 3285 } 3286 3287 /** 3288 * This is called when a child activity of this one calls its 3289 * finishActivity(). 3290 * 3291 * @param child The activity making the call. 3292 * @param requestCode Request code that had been used to start the 3293 * activity. 3294 */ 3295 public void finishActivityFromChild(Activity child, int requestCode) { 3296 try { 3297 ActivityManagerNative.getDefault() 3298 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 3299 } catch (RemoteException e) { 3300 // Empty 3301 } 3302 } 3303 3304 /** 3305 * Called when an activity you launched exits, giving you the requestCode 3306 * you started it with, the resultCode it returned, and any additional 3307 * data from it. The <var>resultCode</var> will be 3308 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 3309 * didn't return any result, or crashed during its operation. 3310 * 3311 * <p>You will receive this call immediately before onResume() when your 3312 * activity is re-starting. 3313 * 3314 * @param requestCode The integer request code originally supplied to 3315 * startActivityForResult(), allowing you to identify who this 3316 * result came from. 3317 * @param resultCode The integer result code returned by the child activity 3318 * through its setResult(). 3319 * @param data An Intent, which can return result data to the caller 3320 * (various data can be attached to Intent "extras"). 3321 * 3322 * @see #startActivityForResult 3323 * @see #createPendingResult 3324 * @see #setResult(int) 3325 */ 3326 protected void onActivityResult(int requestCode, int resultCode, 3327 Intent data) { 3328 } 3329 3330 /** 3331 * Create a new PendingIntent object which you can hand to others 3332 * for them to use to send result data back to your 3333 * {@link #onActivityResult} callback. The created object will be either 3334 * one-shot (becoming invalid after a result is sent back) or multiple 3335 * (allowing any number of results to be sent through it). 3336 * 3337 * @param requestCode Private request code for the sender that will be 3338 * associated with the result data when it is returned. The sender can not 3339 * modify this value, allowing you to identify incoming results. 3340 * @param data Default data to supply in the result, which may be modified 3341 * by the sender. 3342 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 3343 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 3344 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 3345 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 3346 * or any of the flags as supported by 3347 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 3348 * of the intent that can be supplied when the actual send happens. 3349 * 3350 * @return Returns an existing or new PendingIntent matching the given 3351 * parameters. May return null only if 3352 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 3353 * supplied. 3354 * 3355 * @see PendingIntent 3356 */ 3357 public PendingIntent createPendingResult(int requestCode, Intent data, 3358 int flags) { 3359 String packageName = getPackageName(); 3360 try { 3361 IIntentSender target = 3362 ActivityManagerNative.getDefault().getIntentSender( 3363 IActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 3364 mParent == null ? mToken : mParent.mToken, 3365 mEmbeddedID, requestCode, data, null, flags); 3366 return target != null ? new PendingIntent(target) : null; 3367 } catch (RemoteException e) { 3368 // Empty 3369 } 3370 return null; 3371 } 3372 3373 /** 3374 * Change the desired orientation of this activity. If the activity 3375 * is currently in the foreground or otherwise impacting the screen 3376 * orientation, the screen will immediately be changed (possibly causing 3377 * the activity to be restarted). Otherwise, this will be used the next 3378 * time the activity is visible. 3379 * 3380 * @param requestedOrientation An orientation constant as used in 3381 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3382 */ 3383 public void setRequestedOrientation(int requestedOrientation) { 3384 if (mParent == null) { 3385 try { 3386 ActivityManagerNative.getDefault().setRequestedOrientation( 3387 mToken, requestedOrientation); 3388 } catch (RemoteException e) { 3389 // Empty 3390 } 3391 } else { 3392 mParent.setRequestedOrientation(requestedOrientation); 3393 } 3394 } 3395 3396 /** 3397 * Return the current requested orientation of the activity. This will 3398 * either be the orientation requested in its component's manifest, or 3399 * the last requested orientation given to 3400 * {@link #setRequestedOrientation(int)}. 3401 * 3402 * @return Returns an orientation constant as used in 3403 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3404 */ 3405 public int getRequestedOrientation() { 3406 if (mParent == null) { 3407 try { 3408 return ActivityManagerNative.getDefault() 3409 .getRequestedOrientation(mToken); 3410 } catch (RemoteException e) { 3411 // Empty 3412 } 3413 } else { 3414 return mParent.getRequestedOrientation(); 3415 } 3416 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 3417 } 3418 3419 /** 3420 * Return the identifier of the task this activity is in. This identifier 3421 * will remain the same for the lifetime of the activity. 3422 * 3423 * @return Task identifier, an opaque integer. 3424 */ 3425 public int getTaskId() { 3426 try { 3427 return ActivityManagerNative.getDefault() 3428 .getTaskForActivity(mToken, false); 3429 } catch (RemoteException e) { 3430 return -1; 3431 } 3432 } 3433 3434 /** 3435 * Return whether this activity is the root of a task. The root is the 3436 * first activity in a task. 3437 * 3438 * @return True if this is the root activity, else false. 3439 */ 3440 public boolean isTaskRoot() { 3441 try { 3442 return ActivityManagerNative.getDefault() 3443 .getTaskForActivity(mToken, true) >= 0; 3444 } catch (RemoteException e) { 3445 return false; 3446 } 3447 } 3448 3449 /** 3450 * Move the task containing this activity to the back of the activity 3451 * stack. The activity's order within the task is unchanged. 3452 * 3453 * @param nonRoot If false then this only works if the activity is the root 3454 * of a task; if true it will work for any activity in 3455 * a task. 3456 * 3457 * @return If the task was moved (or it was already at the 3458 * back) true is returned, else false. 3459 */ 3460 public boolean moveTaskToBack(boolean nonRoot) { 3461 try { 3462 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 3463 mToken, nonRoot); 3464 } catch (RemoteException e) { 3465 // Empty 3466 } 3467 return false; 3468 } 3469 3470 /** 3471 * Returns class name for this activity with the package prefix removed. 3472 * This is the default name used to read and write settings. 3473 * 3474 * @return The local class name. 3475 */ 3476 public String getLocalClassName() { 3477 final String pkg = getPackageName(); 3478 final String cls = mComponent.getClassName(); 3479 int packageLen = pkg.length(); 3480 if (!cls.startsWith(pkg) || cls.length() <= packageLen 3481 || cls.charAt(packageLen) != '.') { 3482 return cls; 3483 } 3484 return cls.substring(packageLen+1); 3485 } 3486 3487 /** 3488 * Returns complete component name of this activity. 3489 * 3490 * @return Returns the complete component name for this activity 3491 */ 3492 public ComponentName getComponentName() 3493 { 3494 return mComponent; 3495 } 3496 3497 /** 3498 * Retrieve a {@link SharedPreferences} object for accessing preferences 3499 * that are private to this activity. This simply calls the underlying 3500 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 3501 * class name as the preferences name. 3502 * 3503 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 3504 * operation, {@link #MODE_WORLD_READABLE} and 3505 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 3506 * 3507 * @return Returns the single SharedPreferences instance that can be used 3508 * to retrieve and modify the preference values. 3509 */ 3510 public SharedPreferences getPreferences(int mode) { 3511 return getSharedPreferences(getLocalClassName(), mode); 3512 } 3513 3514 private void ensureSearchManager() { 3515 if (mSearchManager != null) { 3516 return; 3517 } 3518 3519 mSearchManager = new SearchManager(this, null); 3520 } 3521 3522 @Override 3523 public Object getSystemService(String name) { 3524 if (getBaseContext() == null) { 3525 throw new IllegalStateException( 3526 "System services not available to Activities before onCreate()"); 3527 } 3528 3529 if (WINDOW_SERVICE.equals(name)) { 3530 return mWindowManager; 3531 } else if (SEARCH_SERVICE.equals(name)) { 3532 ensureSearchManager(); 3533 return mSearchManager; 3534 } 3535 return super.getSystemService(name); 3536 } 3537 3538 /** 3539 * Change the title associated with this activity. If this is a 3540 * top-level activity, the title for its window will change. If it 3541 * is an embedded activity, the parent can do whatever it wants 3542 * with it. 3543 */ 3544 public void setTitle(CharSequence title) { 3545 mTitle = title; 3546 onTitleChanged(title, mTitleColor); 3547 3548 if (mParent != null) { 3549 mParent.onChildTitleChanged(this, title); 3550 } 3551 } 3552 3553 /** 3554 * Change the title associated with this activity. If this is a 3555 * top-level activity, the title for its window will change. If it 3556 * is an embedded activity, the parent can do whatever it wants 3557 * with it. 3558 */ 3559 public void setTitle(int titleId) { 3560 setTitle(getText(titleId)); 3561 } 3562 3563 public void setTitleColor(int textColor) { 3564 mTitleColor = textColor; 3565 onTitleChanged(mTitle, textColor); 3566 } 3567 3568 public final CharSequence getTitle() { 3569 return mTitle; 3570 } 3571 3572 public final int getTitleColor() { 3573 return mTitleColor; 3574 } 3575 3576 protected void onTitleChanged(CharSequence title, int color) { 3577 if (mTitleReady) { 3578 final Window win = getWindow(); 3579 if (win != null) { 3580 win.setTitle(title); 3581 if (color != 0) { 3582 win.setTitleColor(color); 3583 } 3584 } 3585 } 3586 } 3587 3588 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 3589 } 3590 3591 /** 3592 * Sets the visibility of the progress bar in the title. 3593 * <p> 3594 * In order for the progress bar to be shown, the feature must be requested 3595 * via {@link #requestWindowFeature(int)}. 3596 * 3597 * @param visible Whether to show the progress bars in the title. 3598 */ 3599 public final void setProgressBarVisibility(boolean visible) { 3600 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 3601 Window.PROGRESS_VISIBILITY_OFF); 3602 } 3603 3604 /** 3605 * Sets the visibility of the indeterminate progress bar in the title. 3606 * <p> 3607 * In order for the progress bar to be shown, the feature must be requested 3608 * via {@link #requestWindowFeature(int)}. 3609 * 3610 * @param visible Whether to show the progress bars in the title. 3611 */ 3612 public final void setProgressBarIndeterminateVisibility(boolean visible) { 3613 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 3614 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 3615 } 3616 3617 /** 3618 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 3619 * is always indeterminate). 3620 * <p> 3621 * In order for the progress bar to be shown, the feature must be requested 3622 * via {@link #requestWindowFeature(int)}. 3623 * 3624 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 3625 */ 3626 public final void setProgressBarIndeterminate(boolean indeterminate) { 3627 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3628 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 3629 } 3630 3631 /** 3632 * Sets the progress for the progress bars in the title. 3633 * <p> 3634 * In order for the progress bar to be shown, the feature must be requested 3635 * via {@link #requestWindowFeature(int)}. 3636 * 3637 * @param progress The progress for the progress bar. Valid ranges are from 3638 * 0 to 10000 (both inclusive). If 10000 is given, the progress 3639 * bar will be completely filled and will fade out. 3640 */ 3641 public final void setProgress(int progress) { 3642 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 3643 } 3644 3645 /** 3646 * Sets the secondary progress for the progress bar in the title. This 3647 * progress is drawn between the primary progress (set via 3648 * {@link #setProgress(int)} and the background. It can be ideal for media 3649 * scenarios such as showing the buffering progress while the default 3650 * progress shows the play progress. 3651 * <p> 3652 * In order for the progress bar to be shown, the feature must be requested 3653 * via {@link #requestWindowFeature(int)}. 3654 * 3655 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 3656 * 0 to 10000 (both inclusive). 3657 */ 3658 public final void setSecondaryProgress(int secondaryProgress) { 3659 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3660 secondaryProgress + Window.PROGRESS_SECONDARY_START); 3661 } 3662 3663 /** 3664 * Suggests an audio stream whose volume should be changed by the hardware 3665 * volume controls. 3666 * <p> 3667 * The suggested audio stream will be tied to the window of this Activity. 3668 * If the Activity is switched, the stream set here is no longer the 3669 * suggested stream. The client does not need to save and restore the old 3670 * suggested stream value in onPause and onResume. 3671 * 3672 * @param streamType The type of the audio stream whose volume should be 3673 * changed by the hardware volume controls. It is not guaranteed that 3674 * the hardware volume controls will always change this stream's 3675 * volume (for example, if a call is in progress, its stream's volume 3676 * may be changed instead). To reset back to the default, use 3677 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 3678 */ 3679 public final void setVolumeControlStream(int streamType) { 3680 getWindow().setVolumeControlStream(streamType); 3681 } 3682 3683 /** 3684 * Gets the suggested audio stream whose volume should be changed by the 3685 * harwdare volume controls. 3686 * 3687 * @return The suggested audio stream type whose volume should be changed by 3688 * the hardware volume controls. 3689 * @see #setVolumeControlStream(int) 3690 */ 3691 public final int getVolumeControlStream() { 3692 return getWindow().getVolumeControlStream(); 3693 } 3694 3695 /** 3696 * Runs the specified action on the UI thread. If the current thread is the UI 3697 * thread, then the action is executed immediately. If the current thread is 3698 * not the UI thread, the action is posted to the event queue of the UI thread. 3699 * 3700 * @param action the action to run on the UI thread 3701 */ 3702 public final void runOnUiThread(Runnable action) { 3703 if (Thread.currentThread() != mUiThread) { 3704 mHandler.post(action); 3705 } else { 3706 action.run(); 3707 } 3708 } 3709 3710 /** 3711 * Stub implementation of {@link android.view.LayoutInflater.Factory#onCreateView} used when 3712 * inflating with the LayoutInflater returned by {@link #getSystemService}. This 3713 * implementation simply returns null for all view names. 3714 * 3715 * @see android.view.LayoutInflater#createView 3716 * @see android.view.Window#getLayoutInflater 3717 */ 3718 public View onCreateView(String name, Context context, AttributeSet attrs) { 3719 return null; 3720 } 3721 3722 /** 3723 * Bit indicating that this activity is "immersive" and should not be 3724 * interrupted by notifications if possible. 3725 * 3726 * This value is initially set by the manifest property 3727 * <code>android:immersive</code> but may be changed at runtime by 3728 * {@link #setImmersive}. 3729 * 3730 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 3731 */ 3732 public boolean isImmersive() { 3733 try { 3734 return ActivityManagerNative.getDefault().isImmersive(mToken); 3735 } catch (RemoteException e) { 3736 return false; 3737 } 3738 } 3739 3740 /** 3741 * Adjust the current immersive mode setting. 3742 * 3743 * Note that changing this value will have no effect on the activity's 3744 * {@link android.content.pm.ActivityInfo} structure; that is, if 3745 * <code>android:immersive</code> is set to <code>true</code> 3746 * in the application's manifest entry for this activity, the {@link 3747 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 3748 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 3749 * FLAG_IMMERSIVE} bit set. 3750 * 3751 * @see #isImmersive 3752 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 3753 */ 3754 public void setImmersive(boolean i) { 3755 try { 3756 ActivityManagerNative.getDefault().setImmersive(mToken, i); 3757 } catch (RemoteException e) { 3758 // pass 3759 } 3760 } 3761 3762 // ------------------ Internal API ------------------ 3763 3764 final void setParent(Activity parent) { 3765 mParent = parent; 3766 } 3767 3768 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 3769 Application application, Intent intent, ActivityInfo info, CharSequence title, 3770 Activity parent, String id, Object lastNonConfigurationInstance, 3771 Configuration config) { 3772 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 3773 lastNonConfigurationInstance, null, config); 3774 } 3775 3776 final void attach(Context context, ActivityThread aThread, 3777 Instrumentation instr, IBinder token, int ident, 3778 Application application, Intent intent, ActivityInfo info, 3779 CharSequence title, Activity parent, String id, 3780 Object lastNonConfigurationInstance, 3781 HashMap<String,Object> lastNonConfigurationChildInstances, 3782 Configuration config) { 3783 attachBaseContext(context); 3784 3785 mWindow = PolicyManager.makeNewWindow(this); 3786 mWindow.setCallback(this); 3787 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 3788 mWindow.setSoftInputMode(info.softInputMode); 3789 } 3790 mUiThread = Thread.currentThread(); 3791 3792 mMainThread = aThread; 3793 mInstrumentation = instr; 3794 mToken = token; 3795 mIdent = ident; 3796 mApplication = application; 3797 mIntent = intent; 3798 mComponent = intent.getComponent(); 3799 mActivityInfo = info; 3800 mTitle = title; 3801 mParent = parent; 3802 mEmbeddedID = id; 3803 mLastNonConfigurationInstance = lastNonConfigurationInstance; 3804 mLastNonConfigurationChildInstances = lastNonConfigurationChildInstances; 3805 3806 mWindow.setWindowManager(null, mToken, mComponent.flattenToString()); 3807 if (mParent != null) { 3808 mWindow.setContainer(mParent.getWindow()); 3809 } 3810 mWindowManager = mWindow.getWindowManager(); 3811 mCurrentConfig = config; 3812 } 3813 3814 final IBinder getActivityToken() { 3815 return mParent != null ? mParent.getActivityToken() : mToken; 3816 } 3817 3818 final void performStart() { 3819 mCalled = false; 3820 mInstrumentation.callActivityOnStart(this); 3821 if (!mCalled) { 3822 throw new SuperNotCalledException( 3823 "Activity " + mComponent.toShortString() + 3824 " did not call through to super.onStart()"); 3825 } 3826 } 3827 3828 final void performRestart() { 3829 synchronized (mManagedCursors) { 3830 final int N = mManagedCursors.size(); 3831 for (int i=0; i<N; i++) { 3832 ManagedCursor mc = mManagedCursors.get(i); 3833 if (mc.mReleased || mc.mUpdated) { 3834 mc.mCursor.requery(); 3835 mc.mReleased = false; 3836 mc.mUpdated = false; 3837 } 3838 } 3839 } 3840 3841 if (mStopped) { 3842 mStopped = false; 3843 mCalled = false; 3844 mInstrumentation.callActivityOnRestart(this); 3845 if (!mCalled) { 3846 throw new SuperNotCalledException( 3847 "Activity " + mComponent.toShortString() + 3848 " did not call through to super.onRestart()"); 3849 } 3850 performStart(); 3851 } 3852 } 3853 3854 final void performResume() { 3855 performRestart(); 3856 3857 mLastNonConfigurationInstance = null; 3858 3859 // First call onResume() -before- setting mResumed, so we don't 3860 // send out any status bar / menu notifications the client makes. 3861 mCalled = false; 3862 mInstrumentation.callActivityOnResume(this); 3863 if (!mCalled) { 3864 throw new SuperNotCalledException( 3865 "Activity " + mComponent.toShortString() + 3866 " did not call through to super.onResume()"); 3867 } 3868 3869 // Now really resume, and install the current status bar and menu. 3870 mResumed = true; 3871 mCalled = false; 3872 onPostResume(); 3873 if (!mCalled) { 3874 throw new SuperNotCalledException( 3875 "Activity " + mComponent.toShortString() + 3876 " did not call through to super.onPostResume()"); 3877 } 3878 } 3879 3880 final void performPause() { 3881 onPause(); 3882 } 3883 3884 final void performUserLeaving() { 3885 onUserInteraction(); 3886 onUserLeaveHint(); 3887 } 3888 3889 final void performStop() { 3890 if (!mStopped) { 3891 if (mWindow != null) { 3892 mWindow.closeAllPanels(); 3893 } 3894 3895 mCalled = false; 3896 mInstrumentation.callActivityOnStop(this); 3897 if (!mCalled) { 3898 throw new SuperNotCalledException( 3899 "Activity " + mComponent.toShortString() + 3900 " did not call through to super.onStop()"); 3901 } 3902 3903 synchronized (mManagedCursors) { 3904 final int N = mManagedCursors.size(); 3905 for (int i=0; i<N; i++) { 3906 ManagedCursor mc = mManagedCursors.get(i); 3907 if (!mc.mReleased) { 3908 mc.mCursor.deactivate(); 3909 mc.mReleased = true; 3910 } 3911 } 3912 } 3913 3914 mStopped = true; 3915 } 3916 mResumed = false; 3917 } 3918 3919 final boolean isResumed() { 3920 return mResumed; 3921 } 3922 3923 void dispatchActivityResult(String who, int requestCode, 3924 int resultCode, Intent data) { 3925 if (Config.LOGV) Log.v( 3926 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 3927 + ", resCode=" + resultCode + ", data=" + data); 3928 if (who == null) { 3929 onActivityResult(requestCode, resultCode, data); 3930 } 3931 } 3932} 3933