Activity.java revision d02bdaab495641ab50e2123fdfd99a819cc40540
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; 70import android.widget.FrameLayout; 71import android.widget.LinearLayout; 72 73import java.util.ArrayList; 74import java.util.HashMap; 75 76/** 77 * An activity is a single, focused thing that the user can do. Almost all 78 * activities interact with the user, so the Activity class takes care of 79 * creating a window for you in which you can place your UI with 80 * {@link #setContentView}. While activities are often presented to the user 81 * as full-screen windows, they can also be used in other ways: as floating 82 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 83 * or embedded inside of another activity (using {@link ActivityGroup}). 84 * 85 * There are two methods almost all subclasses of Activity will implement: 86 * 87 * <ul> 88 * <li> {@link #onCreate} is where you initialize your activity. Most 89 * importantly, here you will usually call {@link #setContentView(int)} 90 * with a layout resource defining your UI, and using {@link #findViewById} 91 * to retrieve the widgets in that UI that you need to interact with 92 * programmatically. 93 * 94 * <li> {@link #onPause} is where you deal with the user leaving your 95 * activity. Most importantly, any changes made by the user should at this 96 * point be committed (usually to the 97 * {@link android.content.ContentProvider} holding the data). 98 * </ul> 99 * 100 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 101 * activity classes must have a corresponding 102 * {@link android.R.styleable#AndroidManifestActivity <activity>} 103 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 104 * 105 * <p>The Activity class is an important part of an application's overall lifecycle, 106 * and the way activities are launched and put together is a fundamental 107 * part of the platform's application model. For a detailed perspective on the structure of 108 * Android applications and lifecycles, please read the <em>Dev Guide</em> document on 109 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a>.</p> 110 * 111 * <p>Topics covered here: 112 * <ol> 113 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 114 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 115 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 116 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 117 * <li><a href="#Permissions">Permissions</a> 118 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 119 * </ol> 120 * 121 * <a name="ActivityLifecycle"></a> 122 * <h3>Activity Lifecycle</h3> 123 * 124 * <p>Activities in the system are managed as an <em>activity stack</em>. 125 * When a new activity is started, it is placed on the top of the stack 126 * and becomes the running activity -- the previous activity always remains 127 * below it in the stack, and will not come to the foreground again until 128 * the new activity exits.</p> 129 * 130 * <p>An activity has essentially four states:</p> 131 * <ul> 132 * <li> If an activity in the foreground of the screen (at the top of 133 * the stack), 134 * it is <em>active</em> or <em>running</em>. </li> 135 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 136 * or transparent activity has focus on top of your activity), it 137 * is <em>paused</em>. A paused activity is completely alive (it 138 * maintains all state and member information and remains attached to 139 * the window manager), but can be killed by the system in extreme 140 * low memory situations. 141 * <li>If an activity is completely obscured by another activity, 142 * it is <em>stopped</em>. It still retains all state and member information, 143 * however, it is no longer visible to the user so its window is hidden 144 * and it will often be killed by the system when memory is needed 145 * elsewhere.</li> 146 * <li>If an activity is paused or stopped, the system can drop the activity 147 * from memory by either asking it to finish, or simply killing its 148 * process. When it is displayed again to the user, it must be 149 * completely restarted and restored to its previous state.</li> 150 * </ul> 151 * 152 * <p>The following diagram shows the important state paths of an Activity. 153 * The square rectangles represent callback methods you can implement to 154 * perform operations when the Activity moves between states. The colored 155 * ovals are major states the Activity can be in.</p> 156 * 157 * <p><img src="../../../images/activity_lifecycle.png" 158 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 159 * 160 * <p>There are three key loops you may be interested in monitoring within your 161 * activity: 162 * 163 * <ul> 164 * <li>The <b>entire lifetime</b> of an activity happens between the first call 165 * to {@link android.app.Activity#onCreate} through to a single final call 166 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 167 * of "global" state in onCreate(), and release all remaining resources in 168 * onDestroy(). For example, if it has a thread running in the background 169 * to download data from the network, it may create that thread in onCreate() 170 * and then stop the thread in onDestroy(). 171 * 172 * <li>The <b>visible lifetime</b> of an activity happens between a call to 173 * {@link android.app.Activity#onStart} until a corresponding call to 174 * {@link android.app.Activity#onStop}. During this time the user can see the 175 * activity on-screen, though it may not be in the foreground and interacting 176 * with the user. Between these two methods you can maintain resources that 177 * are needed to show the activity to the user. For example, you can register 178 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 179 * that impact your UI, and unregister it in onStop() when the user an no 180 * longer see what you are displaying. The onStart() and onStop() methods 181 * can be called multiple times, as the activity becomes visible and hidden 182 * to the user. 183 * 184 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 185 * {@link android.app.Activity#onResume} until a corresponding call to 186 * {@link android.app.Activity#onPause}. During this time the activity is 187 * in front of all other activities and interacting with the user. An activity 188 * can frequently go between the resumed and paused states -- for example when 189 * the device goes to sleep, when an activity result is delivered, when a new 190 * intent is delivered -- so the code in these methods should be fairly 191 * lightweight. 192 * </ul> 193 * 194 * <p>The entire lifecycle of an activity is defined by the following 195 * Activity methods. All of these are hooks that you can override 196 * to do appropriate work when the activity changes state. All 197 * activities will implement {@link android.app.Activity#onCreate} 198 * to do their initial setup; many will also implement 199 * {@link android.app.Activity#onPause} to commit changes to data and 200 * otherwise prepare to stop interacting with the user. You should always 201 * call up to your superclass when implementing these methods.</p> 202 * 203 * </p> 204 * <pre class="prettyprint"> 205 * public class Activity extends ApplicationContext { 206 * protected void onCreate(Bundle savedInstanceState); 207 * 208 * protected void onStart(); 209 * 210 * protected void onRestart(); 211 * 212 * protected void onResume(); 213 * 214 * protected void onPause(); 215 * 216 * protected void onStop(); 217 * 218 * protected void onDestroy(); 219 * } 220 * </pre> 221 * 222 * <p>In general the movement through an activity's lifecycle looks like 223 * this:</p> 224 * 225 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 226 * <colgroup align="left" span="3" /> 227 * <colgroup align="left" /> 228 * <colgroup align="center" /> 229 * <colgroup align="center" /> 230 * 231 * <thead> 232 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 233 * </thead> 234 * 235 * <tbody> 236 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 237 * <td>Called when the activity is first created. 238 * This is where you should do all of your normal static set up: 239 * create views, bind data to lists, etc. This method also 240 * provides you with a Bundle containing the activity's previously 241 * frozen state, if there was one. 242 * <p>Always followed by <code>onStart()</code>.</td> 243 * <td align="center">No</td> 244 * <td align="center"><code>onStart()</code></td> 245 * </tr> 246 * 247 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 248 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 249 * <td>Called after your activity has been stopped, prior to it being 250 * started again. 251 * <p>Always followed by <code>onStart()</code></td> 252 * <td align="center">No</td> 253 * <td align="center"><code>onStart()</code></td> 254 * </tr> 255 * 256 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 257 * <td>Called when the activity is becoming visible to the user. 258 * <p>Followed by <code>onResume()</code> if the activity comes 259 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 260 * <td align="center">No</td> 261 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 262 * </tr> 263 * 264 * <tr><td rowspan="2" style="border-left: none;"> </td> 265 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 266 * <td>Called when the activity will start 267 * interacting with the user. At this point your activity is at 268 * the top of the activity stack, with user input going to it. 269 * <p>Always followed by <code>onPause()</code>.</td> 270 * <td align="center">No</td> 271 * <td align="center"><code>onPause()</code></td> 272 * </tr> 273 * 274 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 275 * <td>Called when the system is about to start resuming a previous 276 * activity. This is typically used to commit unsaved changes to 277 * persistent data, stop animations and other things that may be consuming 278 * CPU, etc. Implementations of this method must be very quick because 279 * the next activity will not be resumed until this method returns. 280 * <p>Followed by either <code>onResume()</code> if the activity 281 * returns back to the front, or <code>onStop()</code> if it becomes 282 * invisible to the user.</td> 283 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 284 * <td align="center"><code>onResume()</code> or<br> 285 * <code>onStop()</code></td> 286 * </tr> 287 * 288 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 289 * <td>Called when the activity is no longer visible to the user, because 290 * another activity has been resumed and is covering this one. This 291 * may happen either because a new activity is being started, an existing 292 * one is being brought in front of this one, or this one is being 293 * destroyed. 294 * <p>Followed by either <code>onRestart()</code> if 295 * this activity is coming back to interact with the user, or 296 * <code>onDestroy()</code> if this activity is going away.</td> 297 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 298 * <td align="center"><code>onRestart()</code> or<br> 299 * <code>onDestroy()</code></td> 300 * </tr> 301 * 302 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 303 * <td>The final call you receive before your 304 * activity is destroyed. This can happen either because the 305 * activity is finishing (someone called {@link Activity#finish} on 306 * it, or because the system is temporarily destroying this 307 * instance of the activity to save space. You can distinguish 308 * between these two scenarios with the {@link 309 * Activity#isFinishing} method.</td> 310 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 311 * <td align="center"><em>nothing</em></td> 312 * </tr> 313 * </tbody> 314 * </table> 315 * 316 * <p>Note the "Killable" column in the above table -- for those methods that 317 * are marked as being killable, after that method returns the process hosting the 318 * activity may killed by the system <em>at any time</em> without another line 319 * of its code being executed. Because of this, you should use the 320 * {@link #onPause} method to write any persistent data (such as user edits) 321 * to storage. In addition, the method 322 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 323 * in such a background state, allowing you to save away any dynamic instance 324 * state in your activity into the given Bundle, to be later received in 325 * {@link #onCreate} if the activity needs to be re-created. 326 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 327 * section for more information on how the lifecycle of a process is tied 328 * to the activities it is hosting. Note that it is important to save 329 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 330 * because the later is not part of the lifecycle callbacks, so will not 331 * be called in every situation as described in its documentation.</p> 332 * 333 * <p>For those methods that are not marked as being killable, the activity's 334 * process will not be killed by the system starting from the time the method 335 * is called and continuing after it returns. Thus an activity is in the killable 336 * state, for example, between after <code>onPause()</code> to the start of 337 * <code>onResume()</code>.</p> 338 * 339 * <a name="ConfigurationChanges"></a> 340 * <h3>Configuration Changes</h3> 341 * 342 * <p>If the configuration of the device (as defined by the 343 * {@link Configuration Resources.Configuration} class) changes, 344 * then anything displaying a user interface will need to update to match that 345 * configuration. Because Activity is the primary mechanism for interacting 346 * with the user, it includes special support for handling configuration 347 * changes.</p> 348 * 349 * <p>Unless you specify otherwise, a configuration change (such as a change 350 * in screen orientation, language, input devices, etc) will cause your 351 * current activity to be <em>destroyed</em>, going through the normal activity 352 * lifecycle process of {@link #onPause}, 353 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 354 * had been in the foreground or visible to the user, once {@link #onDestroy} is 355 * called in that instance then a new instance of the activity will be 356 * created, with whatever savedInstanceState the previous instance had generated 357 * from {@link #onSaveInstanceState}.</p> 358 * 359 * <p>This is done because any application resource, 360 * including layout files, can change based on any configuration value. Thus 361 * the only safe way to handle a configuration change is to re-retrieve all 362 * resources, including layouts, drawables, and strings. Because activities 363 * must already know how to save their state and re-create themselves from 364 * that state, this is a convenient way to have an activity restart itself 365 * with a new configuration.</p> 366 * 367 * <p>In some special cases, you may want to bypass restarting of your 368 * activity based on one or more types of configuration changes. This is 369 * done with the {@link android.R.attr#configChanges android:configChanges} 370 * attribute in its manifest. For any types of configuration changes you say 371 * that you handle there, you will receive a call to your current activity's 372 * {@link #onConfigurationChanged} method instead of being restarted. If 373 * a configuration change involves any that you do not handle, however, the 374 * activity will still be restarted and {@link #onConfigurationChanged} 375 * will not be called.</p> 376 * 377 * <a name="StartingActivities"></a> 378 * <h3>Starting Activities and Getting Results</h3> 379 * 380 * <p>The {@link android.app.Activity#startActivity} 381 * method is used to start a 382 * new activity, which will be placed at the top of the activity stack. It 383 * takes a single argument, an {@link android.content.Intent Intent}, 384 * which describes the activity 385 * to be executed.</p> 386 * 387 * <p>Sometimes you want to get a result back from an activity when it 388 * ends. For example, you may start an activity that lets the user pick 389 * a person in a list of contacts; when it ends, it returns the person 390 * that was selected. To do this, you call the 391 * {@link android.app.Activity#startActivityForResult(Intent, int)} 392 * version with a second integer parameter identifying the call. The result 393 * will come back through your {@link android.app.Activity#onActivityResult} 394 * method.</p> 395 * 396 * <p>When an activity exits, it can call 397 * {@link android.app.Activity#setResult(int)} 398 * to return data back to its parent. It must always supply a result code, 399 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 400 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 401 * return back an Intent containing any additional data it wants. All of this 402 * information appears back on the 403 * parent's <code>Activity.onActivityResult()</code>, along with the integer 404 * identifier it originally supplied.</p> 405 * 406 * <p>If a child activity fails for any reason (such as crashing), the parent 407 * activity will receive a result with the code RESULT_CANCELED.</p> 408 * 409 * <pre class="prettyprint"> 410 * public class MyActivity extends Activity { 411 * ... 412 * 413 * static final int PICK_CONTACT_REQUEST = 0; 414 * 415 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 416 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 417 * // When the user center presses, let them pick a contact. 418 * startActivityForResult( 419 * new Intent(Intent.ACTION_PICK, 420 * new Uri("content://contacts")), 421 * PICK_CONTACT_REQUEST); 422 * return true; 423 * } 424 * return false; 425 * } 426 * 427 * protected void onActivityResult(int requestCode, int resultCode, 428 * Intent data) { 429 * if (requestCode == PICK_CONTACT_REQUEST) { 430 * if (resultCode == RESULT_OK) { 431 * // A contact was picked. Here we will just display it 432 * // to the user. 433 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 434 * } 435 * } 436 * } 437 * } 438 * </pre> 439 * 440 * <a name="SavingPersistentState"></a> 441 * <h3>Saving Persistent State</h3> 442 * 443 * <p>There are generally two kinds of persistent state than an activity 444 * will deal with: shared document-like data (typically stored in a SQLite 445 * database using a {@linkplain android.content.ContentProvider content provider}) 446 * and internal state such as user preferences.</p> 447 * 448 * <p>For content provider data, we suggest that activities use a 449 * "edit in place" user model. That is, any edits a user makes are effectively 450 * made immediately without requiring an additional confirmation step. 451 * Supporting this model is generally a simple matter of following two rules:</p> 452 * 453 * <ul> 454 * <li> <p>When creating a new document, the backing database entry or file for 455 * it is created immediately. For example, if the user chooses to write 456 * a new e-mail, a new entry for that e-mail is created as soon as they 457 * start entering data, so that if they go to any other activity after 458 * that point this e-mail will now appear in the list of drafts.</p> 459 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 460 * commit to the backing content provider or file any changes the user 461 * has made. This ensures that those changes will be seen by any other 462 * activity that is about to run. You will probably want to commit 463 * your data even more aggressively at key times during your 464 * activity's lifecycle: for example before starting a new 465 * activity, before finishing your own activity, when the user 466 * switches between input fields, etc.</p> 467 * </ul> 468 * 469 * <p>This model is designed to prevent data loss when a user is navigating 470 * between activities, and allows the system to safely kill an activity (because 471 * system resources are needed somewhere else) at any time after it has been 472 * paused. Note this implies 473 * that the user pressing BACK from your activity does <em>not</em> 474 * mean "cancel" -- it means to leave the activity with its current contents 475 * saved away. Cancelling edits in an activity must be provided through 476 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 477 * 478 * <p>See the {@linkplain android.content.ContentProvider content package} for 479 * more information about content providers. These are a key aspect of how 480 * different activities invoke and propagate data between themselves.</p> 481 * 482 * <p>The Activity class also provides an API for managing internal persistent state 483 * associated with an activity. This can be used, for example, to remember 484 * the user's preferred initial display in a calendar (day view or week view) 485 * or the user's default home page in a web browser.</p> 486 * 487 * <p>Activity persistent state is managed 488 * with the method {@link #getPreferences}, 489 * allowing you to retrieve and 490 * modify a set of name/value pairs associated with the activity. To use 491 * preferences that are shared across multiple application components 492 * (activities, receivers, services, providers), you can use the underlying 493 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 494 * to retrieve a preferences 495 * object stored under a specific name. 496 * (Note that it is not possible to share settings data across application 497 * packages -- for that you will need a content provider.)</p> 498 * 499 * <p>Here is an excerpt from a calendar activity that stores the user's 500 * preferred view mode in its persistent settings:</p> 501 * 502 * <pre class="prettyprint"> 503 * public class CalendarActivity extends Activity { 504 * ... 505 * 506 * static final int DAY_VIEW_MODE = 0; 507 * static final int WEEK_VIEW_MODE = 1; 508 * 509 * private SharedPreferences mPrefs; 510 * private int mCurViewMode; 511 * 512 * protected void onCreate(Bundle savedInstanceState) { 513 * super.onCreate(savedInstanceState); 514 * 515 * SharedPreferences mPrefs = getSharedPreferences(); 516 * mCurViewMode = mPrefs.getInt("view_mode" DAY_VIEW_MODE); 517 * } 518 * 519 * protected void onPause() { 520 * super.onPause(); 521 * 522 * SharedPreferences.Editor ed = mPrefs.edit(); 523 * ed.putInt("view_mode", mCurViewMode); 524 * ed.commit(); 525 * } 526 * } 527 * </pre> 528 * 529 * <a name="Permissions"></a> 530 * <h3>Permissions</h3> 531 * 532 * <p>The ability to start a particular Activity can be enforced when it is 533 * declared in its 534 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 535 * tag. By doing so, other applications will need to declare a corresponding 536 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 537 * element in their own manifest to be able to start that activity. 538 * 539 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 540 * document for more information on permissions and security in general. 541 * 542 * <a name="ProcessLifecycle"></a> 543 * <h3>Process Lifecycle</h3> 544 * 545 * <p>The Android system attempts to keep application process around for as 546 * long as possible, but eventually will need to remove old processes when 547 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 548 * Lifecycle</a>, the decision about which process to remove is intimately 549 * tied to the state of the user's interaction with it. In general, there 550 * are four states a process can be in based on the activities running in it, 551 * listed here in order of importance. The system will kill less important 552 * processes (the last ones) before it resorts to killing more important 553 * processes (the first ones). 554 * 555 * <ol> 556 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 557 * that the user is currently interacting with) is considered the most important. 558 * Its process will only be killed as a last resort, if it uses more memory 559 * than is available on the device. Generally at this point the device has 560 * reached a memory paging state, so this is required in order to keep the user 561 * interface responsive. 562 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 563 * but not in the foreground, such as one sitting behind a foreground dialog) 564 * is considered extremely important and will not be killed unless that is 565 * required to keep the foreground activity running. 566 * <li> <p>A <b>background activity</b> (an activity that is not visible to 567 * the user and has been paused) is no longer critical, so the system may 568 * safely kill its process to reclaim memory for other foreground or 569 * visible processes. If its process needs to be killed, when the user navigates 570 * back to the activity (making it visible on the screen again), its 571 * {@link #onCreate} method will be called with the savedInstanceState it had previously 572 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 573 * state as the user last left it. 574 * <li> <p>An <b>empty process</b> is one hosting no activities or other 575 * application components (such as {@link Service} or 576 * {@link android.content.BroadcastReceiver} classes). These are killed very 577 * quickly by the system as memory becomes low. For this reason, any 578 * background operation you do outside of an activity must be executed in the 579 * context of an activity BroadcastReceiver or Service to ensure that the system 580 * knows it needs to keep your process around. 581 * </ol> 582 * 583 * <p>Sometimes an Activity may need to do a long-running operation that exists 584 * independently of the activity lifecycle itself. An example may be a camera 585 * application that allows you to upload a picture to a web site. The upload 586 * may take a long time, and the application should allow the user to leave 587 * the application will it is executing. To accomplish this, your Activity 588 * should start a {@link Service} in which the upload takes place. This allows 589 * the system to properly prioritize your process (considering it to be more 590 * important than other non-visible applications) for the duration of the 591 * upload, independent of whether the original activity is paused, stopped, 592 * or finished. 593 */ 594public class Activity extends ContextThemeWrapper 595 implements LayoutInflater.Factory, 596 Window.Callback, KeyEvent.Callback, 597 OnCreateContextMenuListener, ComponentCallbacks { 598 private static final String TAG = "Activity"; 599 600 /** Standard activity result: operation canceled. */ 601 public static final int RESULT_CANCELED = 0; 602 /** Standard activity result: operation succeeded. */ 603 public static final int RESULT_OK = -1; 604 /** Start of user-defined activity results. */ 605 public static final int RESULT_FIRST_USER = 1; 606 607 private static long sInstanceCount = 0; 608 609 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 610 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 611 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 612 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 613 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 614 615 private static class ManagedDialog { 616 Dialog mDialog; 617 Bundle mArgs; 618 } 619 private SparseArray<ManagedDialog> mManagedDialogs; 620 621 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 622 private Instrumentation mInstrumentation; 623 private IBinder mToken; 624 private int mIdent; 625 /*package*/ String mEmbeddedID; 626 private Application mApplication; 627 /*package*/ Intent mIntent; 628 private ComponentName mComponent; 629 /*package*/ ActivityInfo mActivityInfo; 630 /*package*/ ActivityThread mMainThread; 631 /*package*/ Object mLastNonConfigurationInstance; 632 /*package*/ HashMap<String,Object> mLastNonConfigurationChildInstances; 633 Activity mParent; 634 boolean mCalled; 635 private boolean mResumed; 636 private boolean mStopped; 637 boolean mFinished; 638 boolean mStartedActivity; 639 /*package*/ int mConfigChangeFlags; 640 /*package*/ Configuration mCurrentConfig; 641 private SearchManager mSearchManager; 642 643 private Window mWindow; 644 645 private WindowManager mWindowManager; 646 /*package*/ View mDecor = null; 647 /*package*/ boolean mWindowAdded = false; 648 /*package*/ boolean mVisibleFromServer = false; 649 /*package*/ boolean mVisibleFromClient = true; 650 651 private CharSequence mTitle; 652 private int mTitleColor = 0; 653 654 private static final class ManagedCursor { 655 ManagedCursor(Cursor cursor) { 656 mCursor = cursor; 657 mReleased = false; 658 mUpdated = false; 659 } 660 661 private final Cursor mCursor; 662 private boolean mReleased; 663 private boolean mUpdated; 664 } 665 private final ArrayList<ManagedCursor> mManagedCursors = 666 new ArrayList<ManagedCursor>(); 667 668 // protected by synchronized (this) 669 int mResultCode = RESULT_CANCELED; 670 Intent mResultData = null; 671 672 private boolean mTitleReady = false; 673 674 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 675 private SpannableStringBuilder mDefaultKeySsb = null; 676 677 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 678 679 private Thread mUiThread; 680 private final Handler mHandler = new Handler(); 681 682 // Used for debug only 683 /* 684 public Activity() { 685 ++sInstanceCount; 686 } 687 688 @Override 689 protected void finalize() throws Throwable { 690 super.finalize(); 691 --sInstanceCount; 692 } 693 */ 694 695 public static long getInstanceCount() { 696 return sInstanceCount; 697 } 698 699 /** Return the intent that started this activity. */ 700 public Intent getIntent() { 701 return mIntent; 702 } 703 704 /** 705 * Change the intent returned by {@link #getIntent}. This holds a 706 * reference to the given intent; it does not copy it. Often used in 707 * conjunction with {@link #onNewIntent}. 708 * 709 * @param newIntent The new Intent object to return from getIntent 710 * 711 * @see #getIntent 712 * @see #onNewIntent 713 */ 714 public void setIntent(Intent newIntent) { 715 mIntent = newIntent; 716 } 717 718 /** Return the application that owns this activity. */ 719 public final Application getApplication() { 720 return mApplication; 721 } 722 723 /** Is this activity embedded inside of another activity? */ 724 public final boolean isChild() { 725 return mParent != null; 726 } 727 728 /** Return the parent activity if this view is an embedded child. */ 729 public final Activity getParent() { 730 return mParent; 731 } 732 733 /** Retrieve the window manager for showing custom windows. */ 734 public WindowManager getWindowManager() { 735 return mWindowManager; 736 } 737 738 /** 739 * Retrieve the current {@link android.view.Window} for the activity. 740 * This can be used to directly access parts of the Window API that 741 * are not available through Activity/Screen. 742 * 743 * @return Window The current window, or null if the activity is not 744 * visual. 745 */ 746 public Window getWindow() { 747 return mWindow; 748 } 749 750 /** 751 * Calls {@link android.view.Window#getCurrentFocus} on the 752 * Window of this Activity to return the currently focused view. 753 * 754 * @return View The current View with focus or null. 755 * 756 * @see #getWindow 757 * @see android.view.Window#getCurrentFocus 758 */ 759 public View getCurrentFocus() { 760 return mWindow != null ? mWindow.getCurrentFocus() : null; 761 } 762 763 @Override 764 public int getWallpaperDesiredMinimumWidth() { 765 int width = super.getWallpaperDesiredMinimumWidth(); 766 return width <= 0 ? getWindowManager().getDefaultDisplay().getWidth() : width; 767 } 768 769 @Override 770 public int getWallpaperDesiredMinimumHeight() { 771 int height = super.getWallpaperDesiredMinimumHeight(); 772 return height <= 0 ? getWindowManager().getDefaultDisplay().getHeight() : height; 773 } 774 775 /** 776 * Called when the activity is starting. This is where most initialization 777 * should go: calling {@link #setContentView(int)} to inflate the 778 * activity's UI, using {@link #findViewById} to programmatically interact 779 * with widgets in the UI, calling 780 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 781 * cursors for data being displayed, etc. 782 * 783 * <p>You can call {@link #finish} from within this function, in 784 * which case onDestroy() will be immediately called without any of the rest 785 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 786 * {@link #onPause}, etc) executing. 787 * 788 * <p><em>Derived classes must call through to the super class's 789 * implementation of this method. If they do not, an exception will be 790 * thrown.</em></p> 791 * 792 * @param savedInstanceState If the activity is being re-initialized after 793 * previously being shut down then this Bundle contains the data it most 794 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 795 * 796 * @see #onStart 797 * @see #onSaveInstanceState 798 * @see #onRestoreInstanceState 799 * @see #onPostCreate 800 */ 801 protected void onCreate(Bundle savedInstanceState) { 802 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 803 com.android.internal.R.styleable.Window_windowNoDisplay, false); 804 mCalled = true; 805 } 806 807 /** 808 * The hook for {@link ActivityThread} to restore the state of this activity. 809 * 810 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 811 * {@link #restoreManagedDialogs(android.os.Bundle)}. 812 * 813 * @param savedInstanceState contains the saved state 814 */ 815 final void performRestoreInstanceState(Bundle savedInstanceState) { 816 onRestoreInstanceState(savedInstanceState); 817 restoreManagedDialogs(savedInstanceState); 818 } 819 820 /** 821 * This method is called after {@link #onStart} when the activity is 822 * being re-initialized from a previously saved state, given here in 823 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 824 * to restore their state, but it is sometimes convenient to do it here 825 * after all of the initialization has been done or to allow subclasses to 826 * decide whether to use your default implementation. The default 827 * implementation of this method performs a restore of any view state that 828 * had previously been frozen by {@link #onSaveInstanceState}. 829 * 830 * <p>This method is called between {@link #onStart} and 831 * {@link #onPostCreate}. 832 * 833 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 834 * 835 * @see #onCreate 836 * @see #onPostCreate 837 * @see #onResume 838 * @see #onSaveInstanceState 839 */ 840 protected void onRestoreInstanceState(Bundle savedInstanceState) { 841 if (mWindow != null) { 842 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 843 if (windowState != null) { 844 mWindow.restoreHierarchyState(windowState); 845 } 846 } 847 } 848 849 /** 850 * Restore the state of any saved managed dialogs. 851 * 852 * @param savedInstanceState The bundle to restore from. 853 */ 854 private void restoreManagedDialogs(Bundle savedInstanceState) { 855 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 856 if (b == null) { 857 return; 858 } 859 860 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 861 final int numDialogs = ids.length; 862 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 863 for (int i = 0; i < numDialogs; i++) { 864 final Integer dialogId = ids[i]; 865 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 866 if (dialogState != null) { 867 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 868 // so tell createDialog() not to do it, otherwise we get an exception 869 final ManagedDialog md = new ManagedDialog(); 870 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 871 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 872 if (md.mDialog != null) { 873 mManagedDialogs.put(dialogId, md); 874 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 875 md.mDialog.onRestoreInstanceState(dialogState); 876 } 877 } 878 } 879 } 880 881 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 882 final Dialog dialog = onCreateDialog(dialogId, args); 883 if (dialog == null) { 884 return null; 885 } 886 dialog.dispatchOnCreate(state); 887 return dialog; 888 } 889 890 private static String savedDialogKeyFor(int key) { 891 return SAVED_DIALOG_KEY_PREFIX + key; 892 } 893 894 private static String savedDialogArgsKeyFor(int key) { 895 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 896 } 897 898 /** 899 * Called when activity start-up is complete (after {@link #onStart} 900 * and {@link #onRestoreInstanceState} have been called). Applications will 901 * generally not implement this method; it is intended for system 902 * classes to do final initialization after application code has run. 903 * 904 * <p><em>Derived classes must call through to the super class's 905 * implementation of this method. If they do not, an exception will be 906 * thrown.</em></p> 907 * 908 * @param savedInstanceState If the activity is being re-initialized after 909 * previously being shut down then this Bundle contains the data it most 910 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 911 * @see #onCreate 912 */ 913 protected void onPostCreate(Bundle savedInstanceState) { 914 if (!isChild()) { 915 mTitleReady = true; 916 onTitleChanged(getTitle(), getTitleColor()); 917 } 918 mCalled = true; 919 } 920 921 /** 922 * Called after {@link #onCreate} — or after {@link #onRestart} when 923 * the activity had been stopped, but is now again being displayed to the 924 * user. It will be followed by {@link #onResume}. 925 * 926 * <p><em>Derived classes must call through to the super class's 927 * implementation of this method. If they do not, an exception will be 928 * thrown.</em></p> 929 * 930 * @see #onCreate 931 * @see #onStop 932 * @see #onResume 933 */ 934 protected void onStart() { 935 mCalled = true; 936 } 937 938 /** 939 * Called after {@link #onStop} when the current activity is being 940 * re-displayed to the user (the user has navigated back to it). It will 941 * be followed by {@link #onStart} and then {@link #onResume}. 942 * 943 * <p>For activities that are using raw {@link Cursor} objects (instead of 944 * creating them through 945 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 946 * this is usually the place 947 * where the cursor should be requeried (because you had deactivated it in 948 * {@link #onStop}. 949 * 950 * <p><em>Derived classes must call through to the super class's 951 * implementation of this method. If they do not, an exception will be 952 * thrown.</em></p> 953 * 954 * @see #onStop 955 * @see #onStart 956 * @see #onResume 957 */ 958 protected void onRestart() { 959 mCalled = true; 960 } 961 962 /** 963 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 964 * {@link #onPause}, for your activity to start interacting with the user. 965 * This is a good place to begin animations, open exclusive-access devices 966 * (such as the camera), etc. 967 * 968 * <p>Keep in mind that onResume is not the best indicator that your activity 969 * is visible to the user; a system window such as the keyguard may be in 970 * front. Use {@link #onWindowFocusChanged} to know for certain that your 971 * activity is visible to the user (for example, to resume a game). 972 * 973 * <p><em>Derived classes must call through to the super class's 974 * implementation of this method. If they do not, an exception will be 975 * thrown.</em></p> 976 * 977 * @see #onRestoreInstanceState 978 * @see #onRestart 979 * @see #onPostResume 980 * @see #onPause 981 */ 982 protected void onResume() { 983 mCalled = true; 984 } 985 986 /** 987 * Called when activity resume is complete (after {@link #onResume} has 988 * been called). Applications will generally not implement this method; 989 * it is intended for system classes to do final setup after application 990 * resume code has run. 991 * 992 * <p><em>Derived classes must call through to the super class's 993 * implementation of this method. If they do not, an exception will be 994 * thrown.</em></p> 995 * 996 * @see #onResume 997 */ 998 protected void onPostResume() { 999 final Window win = getWindow(); 1000 if (win != null) win.makeActive(); 1001 mCalled = true; 1002 } 1003 1004 /** 1005 * This is called for activities that set launchMode to "singleTop" in 1006 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1007 * flag when calling {@link #startActivity}. In either case, when the 1008 * activity is re-launched while at the top of the activity stack instead 1009 * of a new instance of the activity being started, onNewIntent() will be 1010 * called on the existing instance with the Intent that was used to 1011 * re-launch it. 1012 * 1013 * <p>An activity will always be paused before receiving a new intent, so 1014 * you can count on {@link #onResume} being called after this method. 1015 * 1016 * <p>Note that {@link #getIntent} still returns the original Intent. You 1017 * can use {@link #setIntent} to update it to this new Intent. 1018 * 1019 * @param intent The new intent that was started for the activity. 1020 * 1021 * @see #getIntent 1022 * @see #setIntent 1023 * @see #onResume 1024 */ 1025 protected void onNewIntent(Intent intent) { 1026 } 1027 1028 /** 1029 * The hook for {@link ActivityThread} to save the state of this activity. 1030 * 1031 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1032 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1033 * 1034 * @param outState The bundle to save the state to. 1035 */ 1036 final void performSaveInstanceState(Bundle outState) { 1037 onSaveInstanceState(outState); 1038 saveManagedDialogs(outState); 1039 } 1040 1041 /** 1042 * Called to retrieve per-instance state from an activity before being killed 1043 * so that the state can be restored in {@link #onCreate} or 1044 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1045 * will be passed to both). 1046 * 1047 * <p>This method is called before an activity may be killed so that when it 1048 * comes back some time in the future it can restore its state. For example, 1049 * if activity B is launched in front of activity A, and at some point activity 1050 * A is killed to reclaim resources, activity A will have a chance to save the 1051 * current state of its user interface via this method so that when the user 1052 * returns to activity A, the state of the user interface can be restored 1053 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1054 * 1055 * <p>Do not confuse this method with activity lifecycle callbacks such as 1056 * {@link #onPause}, which is always called when an activity is being placed 1057 * in the background or on its way to destruction, or {@link #onStop} which 1058 * is called before destruction. One example of when {@link #onPause} and 1059 * {@link #onStop} is called and not this method is when a user navigates back 1060 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1061 * on B because that particular instance will never be restored, so the 1062 * system avoids calling it. An example when {@link #onPause} is called and 1063 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1064 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1065 * killed during the lifetime of B since the state of the user interface of 1066 * A will stay intact. 1067 * 1068 * <p>The default implementation takes care of most of the UI per-instance 1069 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1070 * view in the hierarchy that has an id, and by saving the id of the currently 1071 * focused view (all of which is restored by the default implementation of 1072 * {@link #onRestoreInstanceState}). If you override this method to save additional 1073 * information not captured by each individual view, you will likely want to 1074 * call through to the default implementation, otherwise be prepared to save 1075 * all of the state of each view yourself. 1076 * 1077 * <p>If called, this method will occur before {@link #onStop}. There are 1078 * no guarantees about whether it will occur before or after {@link #onPause}. 1079 * 1080 * @param outState Bundle in which to place your saved state. 1081 * 1082 * @see #onCreate 1083 * @see #onRestoreInstanceState 1084 * @see #onPause 1085 */ 1086 protected void onSaveInstanceState(Bundle outState) { 1087 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1088 } 1089 1090 /** 1091 * Save the state of any managed dialogs. 1092 * 1093 * @param outState place to store the saved state. 1094 */ 1095 private void saveManagedDialogs(Bundle outState) { 1096 if (mManagedDialogs == null) { 1097 return; 1098 } 1099 1100 final int numDialogs = mManagedDialogs.size(); 1101 if (numDialogs == 0) { 1102 return; 1103 } 1104 1105 Bundle dialogState = new Bundle(); 1106 1107 int[] ids = new int[mManagedDialogs.size()]; 1108 1109 // save each dialog's bundle, gather the ids 1110 for (int i = 0; i < numDialogs; i++) { 1111 final int key = mManagedDialogs.keyAt(i); 1112 ids[i] = key; 1113 final ManagedDialog md = mManagedDialogs.valueAt(i); 1114 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1115 if (md.mArgs != null) { 1116 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1117 } 1118 } 1119 1120 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1121 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1122 } 1123 1124 1125 /** 1126 * Called as part of the activity lifecycle when an activity is going into 1127 * the background, but has not (yet) been killed. The counterpart to 1128 * {@link #onResume}. 1129 * 1130 * <p>When activity B is launched in front of activity A, this callback will 1131 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1132 * so be sure to not do anything lengthy here. 1133 * 1134 * <p>This callback is mostly used for saving any persistent state the 1135 * activity is editing, to present a "edit in place" model to the user and 1136 * making sure nothing is lost if there are not enough resources to start 1137 * the new activity without first killing this one. This is also a good 1138 * place to do things like stop animations and other things that consume a 1139 * noticeable mount of CPU in order to make the switch to the next activity 1140 * as fast as possible, or to close resources that are exclusive access 1141 * such as the camera. 1142 * 1143 * <p>In situations where the system needs more memory it may kill paused 1144 * processes to reclaim resources. Because of this, you should be sure 1145 * that all of your state is saved by the time you return from 1146 * this function. In general {@link #onSaveInstanceState} is used to save 1147 * per-instance state in the activity and this method is used to store 1148 * global persistent data (in content providers, files, etc.) 1149 * 1150 * <p>After receiving this call you will usually receive a following call 1151 * to {@link #onStop} (after the next activity has been resumed and 1152 * displayed), however in some cases there will be a direct call back to 1153 * {@link #onResume} without going through the stopped state. 1154 * 1155 * <p><em>Derived classes must call through to the super class's 1156 * implementation of this method. If they do not, an exception will be 1157 * thrown.</em></p> 1158 * 1159 * @see #onResume 1160 * @see #onSaveInstanceState 1161 * @see #onStop 1162 */ 1163 protected void onPause() { 1164 mCalled = true; 1165 QueuedWork.waitToFinish(); 1166 } 1167 1168 /** 1169 * Called as part of the activity lifecycle when an activity is about to go 1170 * into the background as the result of user choice. For example, when the 1171 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1172 * when an incoming phone call causes the in-call Activity to be automatically 1173 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1174 * the activity being interrupted. In cases when it is invoked, this method 1175 * is called right before the activity's {@link #onPause} callback. 1176 * 1177 * <p>This callback and {@link #onUserInteraction} are intended to help 1178 * activities manage status bar notifications intelligently; specifically, 1179 * for helping activities determine the proper time to cancel a notfication. 1180 * 1181 * @see #onUserInteraction() 1182 */ 1183 protected void onUserLeaveHint() { 1184 } 1185 1186 /** 1187 * Generate a new thumbnail for this activity. This method is called before 1188 * pausing the activity, and should draw into <var>outBitmap</var> the 1189 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1190 * can use the given <var>canvas</var>, which is configured to draw into the 1191 * bitmap, for rendering if desired. 1192 * 1193 * <p>The default implementation renders the Screen's current view 1194 * hierarchy into the canvas to generate a thumbnail. 1195 * 1196 * <p>If you return false, the bitmap will be filled with a default 1197 * thumbnail. 1198 * 1199 * @param outBitmap The bitmap to contain the thumbnail. 1200 * @param canvas Can be used to render into the bitmap. 1201 * 1202 * @return Return true if you have drawn into the bitmap; otherwise after 1203 * you return it will be filled with a default thumbnail. 1204 * 1205 * @see #onCreateDescription 1206 * @see #onSaveInstanceState 1207 * @see #onPause 1208 */ 1209 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1210 if (mDecor == null) { 1211 return false; 1212 } 1213 1214 int paddingLeft = 0; 1215 int paddingRight = 0; 1216 int paddingTop = 0; 1217 int paddingBottom = 0; 1218 1219 // Find System window and use padding so we ignore space reserved for decorations 1220 // like the status bar and such. 1221 final FrameLayout top = (FrameLayout) mDecor; 1222 for (int i = 0; i < top.getChildCount(); i++) { 1223 View child = top.getChildAt(i); 1224 if (child.isFitsSystemWindowsFlagSet()) { 1225 paddingLeft = child.getPaddingLeft(); 1226 paddingRight = child.getPaddingRight(); 1227 paddingTop = child.getPaddingTop(); 1228 paddingBottom = child.getPaddingBottom(); 1229 break; 1230 } 1231 } 1232 1233 final int visibleWidth = mDecor.getWidth() - paddingLeft - paddingRight; 1234 final int visibleHeight = mDecor.getHeight() - paddingTop - paddingBottom; 1235 1236 canvas.save(); 1237 canvas.scale( (float) outBitmap.getWidth() / visibleWidth, 1238 (float) outBitmap.getHeight() / visibleHeight); 1239 canvas.translate(-paddingLeft, -paddingTop); 1240 mDecor.draw(canvas); 1241 canvas.restore(); 1242 1243 return true; 1244 } 1245 1246 /** 1247 * Generate a new description for this activity. This method is called 1248 * before pausing the activity and can, if desired, return some textual 1249 * description of its current state to be displayed to the user. 1250 * 1251 * <p>The default implementation returns null, which will cause you to 1252 * inherit the description from the previous activity. If all activities 1253 * return null, generally the label of the top activity will be used as the 1254 * description. 1255 * 1256 * @return A description of what the user is doing. It should be short and 1257 * sweet (only a few words). 1258 * 1259 * @see #onCreateThumbnail 1260 * @see #onSaveInstanceState 1261 * @see #onPause 1262 */ 1263 public CharSequence onCreateDescription() { 1264 return null; 1265 } 1266 1267 /** 1268 * Called when you are no longer visible to the user. You will next 1269 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1270 * depending on later user activity. 1271 * 1272 * <p>Note that this method may never be called, in low memory situations 1273 * where the system does not have enough memory to keep your activity's 1274 * process running after its {@link #onPause} method is called. 1275 * 1276 * <p><em>Derived classes must call through to the super class's 1277 * implementation of this method. If they do not, an exception will be 1278 * thrown.</em></p> 1279 * 1280 * @see #onRestart 1281 * @see #onResume 1282 * @see #onSaveInstanceState 1283 * @see #onDestroy 1284 */ 1285 protected void onStop() { 1286 mCalled = true; 1287 } 1288 1289 /** 1290 * Perform any final cleanup before an activity is destroyed. This can 1291 * happen either because the activity is finishing (someone called 1292 * {@link #finish} on it, or because the system is temporarily destroying 1293 * this instance of the activity to save space. You can distinguish 1294 * between these two scenarios with the {@link #isFinishing} method. 1295 * 1296 * <p><em>Note: do not count on this method being called as a place for 1297 * saving data! For example, if an activity is editing data in a content 1298 * provider, those edits should be committed in either {@link #onPause} or 1299 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1300 * free resources like threads that are associated with an activity, so 1301 * that a destroyed activity does not leave such things around while the 1302 * rest of its application is still running. There are situations where 1303 * the system will simply kill the activity's hosting process without 1304 * calling this method (or any others) in it, so it should not be used to 1305 * do things that are intended to remain around after the process goes 1306 * away. 1307 * 1308 * <p><em>Derived classes must call through to the super class's 1309 * implementation of this method. If they do not, an exception will be 1310 * thrown.</em></p> 1311 * 1312 * @see #onPause 1313 * @see #onStop 1314 * @see #finish 1315 * @see #isFinishing 1316 */ 1317 protected void onDestroy() { 1318 mCalled = true; 1319 1320 // dismiss any dialogs we are managing. 1321 if (mManagedDialogs != null) { 1322 final int numDialogs = mManagedDialogs.size(); 1323 for (int i = 0; i < numDialogs; i++) { 1324 final ManagedDialog md = mManagedDialogs.valueAt(i); 1325 if (md.mDialog.isShowing()) { 1326 md.mDialog.dismiss(); 1327 } 1328 } 1329 mManagedDialogs = null; 1330 } 1331 1332 // close any cursors we are managing. 1333 synchronized (mManagedCursors) { 1334 int numCursors = mManagedCursors.size(); 1335 for (int i = 0; i < numCursors; i++) { 1336 ManagedCursor c = mManagedCursors.get(i); 1337 if (c != null) { 1338 c.mCursor.close(); 1339 } 1340 } 1341 mManagedCursors.clear(); 1342 } 1343 1344 // Close any open search dialog 1345 if (mSearchManager != null) { 1346 mSearchManager.stopSearch(); 1347 } 1348 } 1349 1350 /** 1351 * Called by the system when the device configuration changes while your 1352 * activity is running. Note that this will <em>only</em> be called if 1353 * you have selected configurations you would like to handle with the 1354 * {@link android.R.attr#configChanges} attribute in your manifest. If 1355 * any configuration change occurs that is not selected to be reported 1356 * by that attribute, then instead of reporting it the system will stop 1357 * and restart the activity (to have it launched with the new 1358 * configuration). 1359 * 1360 * <p>At the time that this function has been called, your Resources 1361 * object will have been updated to return resource values matching the 1362 * new configuration. 1363 * 1364 * @param newConfig The new device configuration. 1365 */ 1366 public void onConfigurationChanged(Configuration newConfig) { 1367 mCalled = true; 1368 1369 if (mWindow != null) { 1370 // Pass the configuration changed event to the window 1371 mWindow.onConfigurationChanged(newConfig); 1372 } 1373 } 1374 1375 /** 1376 * If this activity is being destroyed because it can not handle a 1377 * configuration parameter being changed (and thus its 1378 * {@link #onConfigurationChanged(Configuration)} method is 1379 * <em>not</em> being called), then you can use this method to discover 1380 * the set of changes that have occurred while in the process of being 1381 * destroyed. Note that there is no guarantee that these will be 1382 * accurate (other changes could have happened at any time), so you should 1383 * only use this as an optimization hint. 1384 * 1385 * @return Returns a bit field of the configuration parameters that are 1386 * changing, as defined by the {@link android.content.res.Configuration} 1387 * class. 1388 */ 1389 public int getChangingConfigurations() { 1390 return mConfigChangeFlags; 1391 } 1392 1393 /** 1394 * Retrieve the non-configuration instance data that was previously 1395 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1396 * be available from the initial {@link #onCreate} and 1397 * {@link #onStart} calls to the new instance, allowing you to extract 1398 * any useful dynamic state from the previous instance. 1399 * 1400 * <p>Note that the data you retrieve here should <em>only</em> be used 1401 * as an optimization for handling configuration changes. You should always 1402 * be able to handle getting a null pointer back, and an activity must 1403 * still be able to restore itself to its previous state (through the 1404 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1405 * function returns null. 1406 * 1407 * @return Returns the object previously returned by 1408 * {@link #onRetainNonConfigurationInstance()}. 1409 */ 1410 public Object getLastNonConfigurationInstance() { 1411 return mLastNonConfigurationInstance; 1412 } 1413 1414 /** 1415 * Called by the system, as part of destroying an 1416 * activity due to a configuration change, when it is known that a new 1417 * instance will immediately be created for the new configuration. You 1418 * can return any object you like here, including the activity instance 1419 * itself, which can later be retrieved by calling 1420 * {@link #getLastNonConfigurationInstance()} in the new activity 1421 * instance. 1422 * 1423 * <p>This function is called purely as an optimization, and you must 1424 * not rely on it being called. When it is called, a number of guarantees 1425 * will be made to help optimize configuration switching: 1426 * <ul> 1427 * <li> The function will be called between {@link #onStop} and 1428 * {@link #onDestroy}. 1429 * <li> A new instance of the activity will <em>always</em> be immediately 1430 * created after this one's {@link #onDestroy()} is called. 1431 * <li> The object you return here will <em>always</em> be available from 1432 * the {@link #getLastNonConfigurationInstance()} method of the following 1433 * activity instance as described there. 1434 * </ul> 1435 * 1436 * <p>These guarantees are designed so that an activity can use this API 1437 * to propagate extensive state from the old to new activity instance, from 1438 * loaded bitmaps, to network connections, to evenly actively running 1439 * threads. Note that you should <em>not</em> propagate any data that 1440 * may change based on the configuration, including any data loaded from 1441 * resources such as strings, layouts, or drawables. 1442 * 1443 * @return Return any Object holding the desired state to propagate to the 1444 * next activity instance. 1445 */ 1446 public Object onRetainNonConfigurationInstance() { 1447 return null; 1448 } 1449 1450 /** 1451 * Retrieve the non-configuration instance data that was previously 1452 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1453 * be available from the initial {@link #onCreate} and 1454 * {@link #onStart} calls to the new instance, allowing you to extract 1455 * any useful dynamic state from the previous instance. 1456 * 1457 * <p>Note that the data you retrieve here should <em>only</em> be used 1458 * as an optimization for handling configuration changes. You should always 1459 * be able to handle getting a null pointer back, and an activity must 1460 * still be able to restore itself to its previous state (through the 1461 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1462 * function returns null. 1463 * 1464 * @return Returns the object previously returned by 1465 * {@link #onRetainNonConfigurationChildInstances()} 1466 */ 1467 HashMap<String,Object> getLastNonConfigurationChildInstances() { 1468 return mLastNonConfigurationChildInstances; 1469 } 1470 1471 /** 1472 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1473 * it should return either a mapping from child activity id strings to arbitrary objects, 1474 * or null. This method is intended to be used by Activity framework subclasses that control a 1475 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1476 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1477 */ 1478 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1479 return null; 1480 } 1481 1482 public void onLowMemory() { 1483 mCalled = true; 1484 } 1485 1486 /** 1487 * Wrapper around 1488 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1489 * that gives the resulting {@link Cursor} to call 1490 * {@link #startManagingCursor} so that the activity will manage its 1491 * lifecycle for you. 1492 * 1493 * @param uri The URI of the content provider to query. 1494 * @param projection List of columns to return. 1495 * @param selection SQL WHERE clause. 1496 * @param sortOrder SQL ORDER BY clause. 1497 * 1498 * @return The Cursor that was returned by query(). 1499 * 1500 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1501 * @see #startManagingCursor 1502 * @hide 1503 */ 1504 public final Cursor managedQuery(Uri uri, 1505 String[] projection, 1506 String selection, 1507 String sortOrder) 1508 { 1509 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1510 if (c != null) { 1511 startManagingCursor(c); 1512 } 1513 return c; 1514 } 1515 1516 /** 1517 * Wrapper around 1518 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1519 * that gives the resulting {@link Cursor} to call 1520 * {@link #startManagingCursor} so that the activity will manage its 1521 * lifecycle for you. 1522 * 1523 * @param uri The URI of the content provider to query. 1524 * @param projection List of columns to return. 1525 * @param selection SQL WHERE clause. 1526 * @param selectionArgs The arguments to selection, if any ?s are pesent 1527 * @param sortOrder SQL ORDER BY clause. 1528 * 1529 * @return The Cursor that was returned by query(). 1530 * 1531 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1532 * @see #startManagingCursor 1533 */ 1534 public final Cursor managedQuery(Uri uri, 1535 String[] projection, 1536 String selection, 1537 String[] selectionArgs, 1538 String sortOrder) 1539 { 1540 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1541 if (c != null) { 1542 startManagingCursor(c); 1543 } 1544 return c; 1545 } 1546 1547 /** 1548 * Wrapper around {@link Cursor#commitUpdates()} that takes care of noting 1549 * that the Cursor needs to be requeried. You can call this method in 1550 * {@link #onPause} or {@link #onStop} to have the system call 1551 * {@link Cursor#requery} for you if the activity is later resumed. This 1552 * allows you to avoid determing when to do the requery yourself (which is 1553 * required for the Cursor to see any data changes that were committed with 1554 * it). 1555 * 1556 * @param c The Cursor whose changes are to be committed. 1557 * 1558 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1559 * @see #startManagingCursor 1560 * @see Cursor#commitUpdates() 1561 * @see Cursor#requery 1562 * @hide 1563 */ 1564 @Deprecated 1565 public void managedCommitUpdates(Cursor c) { 1566 synchronized (mManagedCursors) { 1567 final int N = mManagedCursors.size(); 1568 for (int i=0; i<N; i++) { 1569 ManagedCursor mc = mManagedCursors.get(i); 1570 if (mc.mCursor == c) { 1571 c.commitUpdates(); 1572 mc.mUpdated = true; 1573 return; 1574 } 1575 } 1576 throw new RuntimeException( 1577 "Cursor " + c + " is not currently managed"); 1578 } 1579 } 1580 1581 /** 1582 * This method allows the activity to take care of managing the given 1583 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1584 * That is, when the activity is stopped it will automatically call 1585 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1586 * it will call {@link Cursor#requery} for you. When the activity is 1587 * destroyed, all managed Cursors will be closed automatically. 1588 * 1589 * @param c The Cursor to be managed. 1590 * 1591 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1592 * @see #stopManagingCursor 1593 */ 1594 public void startManagingCursor(Cursor c) { 1595 synchronized (mManagedCursors) { 1596 mManagedCursors.add(new ManagedCursor(c)); 1597 } 1598 } 1599 1600 /** 1601 * Given a Cursor that was previously given to 1602 * {@link #startManagingCursor}, stop the activity's management of that 1603 * cursor. 1604 * 1605 * @param c The Cursor that was being managed. 1606 * 1607 * @see #startManagingCursor 1608 */ 1609 public void stopManagingCursor(Cursor c) { 1610 synchronized (mManagedCursors) { 1611 final int N = mManagedCursors.size(); 1612 for (int i=0; i<N; i++) { 1613 ManagedCursor mc = mManagedCursors.get(i); 1614 if (mc.mCursor == c) { 1615 mManagedCursors.remove(i); 1616 break; 1617 } 1618 } 1619 } 1620 } 1621 1622 /** 1623 * Control whether this activity is required to be persistent. By default 1624 * activities are not persistent; setting this to true will prevent the 1625 * system from stopping this activity or its process when running low on 1626 * resources. 1627 * 1628 * <p><em>You should avoid using this method</em>, it has severe negative 1629 * consequences on how well the system can manage its resources. A better 1630 * approach is to implement an application service that you control with 1631 * {@link Context#startService} and {@link Context#stopService}. 1632 * 1633 * @param isPersistent Control whether the current activity must be 1634 * persistent, true if so, false for the normal 1635 * behavior. 1636 */ 1637 public void setPersistent(boolean isPersistent) { 1638 if (mParent == null) { 1639 try { 1640 ActivityManagerNative.getDefault() 1641 .setPersistent(mToken, isPersistent); 1642 } catch (RemoteException e) { 1643 // Empty 1644 } 1645 } else { 1646 throw new RuntimeException("setPersistent() not yet supported for embedded activities"); 1647 } 1648 } 1649 1650 /** 1651 * Finds a view that was identified by the id attribute from the XML that 1652 * was processed in {@link #onCreate}. 1653 * 1654 * @return The view if found or null otherwise. 1655 */ 1656 public View findViewById(int id) { 1657 return getWindow().findViewById(id); 1658 } 1659 1660 /** 1661 * Set the activity content from a layout resource. The resource will be 1662 * inflated, adding all top-level views to the activity. 1663 * 1664 * @param layoutResID Resource ID to be inflated. 1665 */ 1666 public void setContentView(int layoutResID) { 1667 getWindow().setContentView(layoutResID); 1668 } 1669 1670 /** 1671 * Set the activity content to an explicit view. This view is placed 1672 * directly into the activity's view hierarchy. It can itself be a complex 1673 * view hierarhcy. 1674 * 1675 * @param view The desired content to display. 1676 */ 1677 public void setContentView(View view) { 1678 getWindow().setContentView(view); 1679 } 1680 1681 /** 1682 * Set the activity content to an explicit view. This view is placed 1683 * directly into the activity's view hierarchy. It can itself be a complex 1684 * view hierarhcy. 1685 * 1686 * @param view The desired content to display. 1687 * @param params Layout parameters for the view. 1688 */ 1689 public void setContentView(View view, ViewGroup.LayoutParams params) { 1690 getWindow().setContentView(view, params); 1691 } 1692 1693 /** 1694 * Add an additional content view to the activity. Added after any existing 1695 * ones in the activity -- existing views are NOT removed. 1696 * 1697 * @param view The desired content to display. 1698 * @param params Layout parameters for the view. 1699 */ 1700 public void addContentView(View view, ViewGroup.LayoutParams params) { 1701 getWindow().addContentView(view, params); 1702 } 1703 1704 /** 1705 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1706 * keys. 1707 * 1708 * @see #setDefaultKeyMode 1709 */ 1710 static public final int DEFAULT_KEYS_DISABLE = 0; 1711 /** 1712 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1713 * key handling. 1714 * 1715 * @see #setDefaultKeyMode 1716 */ 1717 static public final int DEFAULT_KEYS_DIALER = 1; 1718 /** 1719 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1720 * default key handling. 1721 * 1722 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1723 * 1724 * @see #setDefaultKeyMode 1725 */ 1726 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1727 /** 1728 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1729 * will start an application-defined search. (If the application or activity does not 1730 * actually define a search, the the keys will be ignored.) 1731 * 1732 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1733 * 1734 * @see #setDefaultKeyMode 1735 */ 1736 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1737 1738 /** 1739 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1740 * will start a global search (typically web search, but some platforms may define alternate 1741 * methods for global search) 1742 * 1743 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1744 * 1745 * @see #setDefaultKeyMode 1746 */ 1747 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1748 1749 /** 1750 * Select the default key handling for this activity. This controls what 1751 * will happen to key events that are not otherwise handled. The default 1752 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1753 * floor. Other modes allow you to launch the dialer 1754 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1755 * menu without requiring the menu key be held down 1756 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1757 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1758 * 1759 * <p>Note that the mode selected here does not impact the default 1760 * handling of system keys, such as the "back" and "menu" keys, and your 1761 * activity and its views always get a first chance to receive and handle 1762 * all application keys. 1763 * 1764 * @param mode The desired default key mode constant. 1765 * 1766 * @see #DEFAULT_KEYS_DISABLE 1767 * @see #DEFAULT_KEYS_DIALER 1768 * @see #DEFAULT_KEYS_SHORTCUT 1769 * @see #DEFAULT_KEYS_SEARCH_LOCAL 1770 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 1771 * @see #onKeyDown 1772 */ 1773 public final void setDefaultKeyMode(int mode) { 1774 mDefaultKeyMode = mode; 1775 1776 // Some modes use a SpannableStringBuilder to track & dispatch input events 1777 // This list must remain in sync with the switch in onKeyDown() 1778 switch (mode) { 1779 case DEFAULT_KEYS_DISABLE: 1780 case DEFAULT_KEYS_SHORTCUT: 1781 mDefaultKeySsb = null; // not used in these modes 1782 break; 1783 case DEFAULT_KEYS_DIALER: 1784 case DEFAULT_KEYS_SEARCH_LOCAL: 1785 case DEFAULT_KEYS_SEARCH_GLOBAL: 1786 mDefaultKeySsb = new SpannableStringBuilder(); 1787 Selection.setSelection(mDefaultKeySsb,0); 1788 break; 1789 default: 1790 throw new IllegalArgumentException(); 1791 } 1792 } 1793 1794 /** 1795 * Called when a key was pressed down and not handled by any of the views 1796 * inside of the activity. So, for example, key presses while the cursor 1797 * is inside a TextView will not trigger the event (unless it is a navigation 1798 * to another object) because TextView handles its own key presses. 1799 * 1800 * <p>If the focused view didn't want this event, this method is called. 1801 * 1802 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 1803 * by calling {@link #onBackPressed()}, though the behavior varies based 1804 * on the application compatibility mode: for 1805 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 1806 * it will set up the dispatch to call {@link #onKeyUp} where the action 1807 * will be performed; for earlier applications, it will perform the 1808 * action immediately in on-down, as those versions of the platform 1809 * behaved. 1810 * 1811 * <p>Other additional default key handling may be performed 1812 * if configured with {@link #setDefaultKeyMode}. 1813 * 1814 * @return Return <code>true</code> to prevent this event from being propagated 1815 * further, or <code>false</code> to indicate that you have not handled 1816 * this event and it should continue to be propagated. 1817 * @see #onKeyUp 1818 * @see android.view.KeyEvent 1819 */ 1820 public boolean onKeyDown(int keyCode, KeyEvent event) { 1821 if (keyCode == KeyEvent.KEYCODE_BACK) { 1822 if (getApplicationInfo().targetSdkVersion 1823 >= Build.VERSION_CODES.ECLAIR) { 1824 event.startTracking(); 1825 } else { 1826 onBackPressed(); 1827 } 1828 return true; 1829 } 1830 1831 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 1832 return false; 1833 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 1834 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 1835 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 1836 return true; 1837 } 1838 return false; 1839 } else { 1840 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 1841 boolean clearSpannable = false; 1842 boolean handled; 1843 if ((event.getRepeatCount() != 0) || event.isSystem()) { 1844 clearSpannable = true; 1845 handled = false; 1846 } else { 1847 handled = TextKeyListener.getInstance().onKeyDown( 1848 null, mDefaultKeySsb, keyCode, event); 1849 if (handled && mDefaultKeySsb.length() > 0) { 1850 // something useable has been typed - dispatch it now. 1851 1852 final String str = mDefaultKeySsb.toString(); 1853 clearSpannable = true; 1854 1855 switch (mDefaultKeyMode) { 1856 case DEFAULT_KEYS_DIALER: 1857 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 1858 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 1859 startActivity(intent); 1860 break; 1861 case DEFAULT_KEYS_SEARCH_LOCAL: 1862 startSearch(str, false, null, false); 1863 break; 1864 case DEFAULT_KEYS_SEARCH_GLOBAL: 1865 startSearch(str, false, null, true); 1866 break; 1867 } 1868 } 1869 } 1870 if (clearSpannable) { 1871 mDefaultKeySsb.clear(); 1872 mDefaultKeySsb.clearSpans(); 1873 Selection.setSelection(mDefaultKeySsb,0); 1874 } 1875 return handled; 1876 } 1877 } 1878 1879 /** 1880 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 1881 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 1882 * the event). 1883 */ 1884 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 1885 return false; 1886 } 1887 1888 /** 1889 * Called when a key was released and not handled by any of the views 1890 * inside of the activity. So, for example, key presses while the cursor 1891 * is inside a TextView will not trigger the event (unless it is a navigation 1892 * to another object) because TextView handles its own key presses. 1893 * 1894 * <p>The default implementation handles KEYCODE_BACK to stop the activity 1895 * and go back. 1896 * 1897 * @return Return <code>true</code> to prevent this event from being propagated 1898 * further, or <code>false</code> to indicate that you have not handled 1899 * this event and it should continue to be propagated. 1900 * @see #onKeyDown 1901 * @see KeyEvent 1902 */ 1903 public boolean onKeyUp(int keyCode, KeyEvent event) { 1904 if (getApplicationInfo().targetSdkVersion 1905 >= Build.VERSION_CODES.ECLAIR) { 1906 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 1907 && !event.isCanceled()) { 1908 onBackPressed(); 1909 return true; 1910 } 1911 } 1912 return false; 1913 } 1914 1915 /** 1916 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 1917 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 1918 * the event). 1919 */ 1920 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 1921 return false; 1922 } 1923 1924 /** 1925 * Called when the activity has detected the user's press of the back 1926 * key. The default implementation simply finishes the current activity, 1927 * but you can override this to do whatever you want. 1928 */ 1929 public void onBackPressed() { 1930 finish(); 1931 } 1932 1933 /** 1934 * Called when a touch screen event was not handled by any of the views 1935 * under it. This is most useful to process touch events that happen 1936 * outside of your window bounds, where there is no view to receive it. 1937 * 1938 * @param event The touch screen event being processed. 1939 * 1940 * @return Return true if you have consumed the event, false if you haven't. 1941 * The default implementation always returns false. 1942 */ 1943 public boolean onTouchEvent(MotionEvent event) { 1944 return false; 1945 } 1946 1947 /** 1948 * Called when the trackball was moved and not handled by any of the 1949 * views inside of the activity. So, for example, if the trackball moves 1950 * while focus is on a button, you will receive a call here because 1951 * buttons do not normally do anything with trackball events. The call 1952 * here happens <em>before</em> trackball movements are converted to 1953 * DPAD key events, which then get sent back to the view hierarchy, and 1954 * will be processed at the point for things like focus navigation. 1955 * 1956 * @param event The trackball event being processed. 1957 * 1958 * @return Return true if you have consumed the event, false if you haven't. 1959 * The default implementation always returns false. 1960 */ 1961 public boolean onTrackballEvent(MotionEvent event) { 1962 return false; 1963 } 1964 1965 /** 1966 * Called whenever a key, touch, or trackball event is dispatched to the 1967 * activity. Implement this method if you wish to know that the user has 1968 * interacted with the device in some way while your activity is running. 1969 * This callback and {@link #onUserLeaveHint} are intended to help 1970 * activities manage status bar notifications intelligently; specifically, 1971 * for helping activities determine the proper time to cancel a notfication. 1972 * 1973 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 1974 * be accompanied by calls to {@link #onUserInteraction}. This 1975 * ensures that your activity will be told of relevant user activity such 1976 * as pulling down the notification pane and touching an item there. 1977 * 1978 * <p>Note that this callback will be invoked for the touch down action 1979 * that begins a touch gesture, but may not be invoked for the touch-moved 1980 * and touch-up actions that follow. 1981 * 1982 * @see #onUserLeaveHint() 1983 */ 1984 public void onUserInteraction() { 1985 } 1986 1987 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 1988 // Update window manager if: we have a view, that view is 1989 // attached to its parent (which will be a RootView), and 1990 // this activity is not embedded. 1991 if (mParent == null) { 1992 View decor = mDecor; 1993 if (decor != null && decor.getParent() != null) { 1994 getWindowManager().updateViewLayout(decor, params); 1995 } 1996 } 1997 } 1998 1999 public void onContentChanged() { 2000 } 2001 2002 /** 2003 * Called when the current {@link Window} of the activity gains or loses 2004 * focus. This is the best indicator of whether this activity is visible 2005 * to the user. The default implementation clears the key tracking 2006 * state, so should always be called. 2007 * 2008 * <p>Note that this provides information about global focus state, which 2009 * is managed independently of activity lifecycles. As such, while focus 2010 * changes will generally have some relation to lifecycle changes (an 2011 * activity that is stopped will not generally get window focus), you 2012 * should not rely on any particular order between the callbacks here and 2013 * those in the other lifecycle methods such as {@link #onResume}. 2014 * 2015 * <p>As a general rule, however, a resumed activity will have window 2016 * focus... unless it has displayed other dialogs or popups that take 2017 * input focus, in which case the activity itself will not have focus 2018 * when the other windows have it. Likewise, the system may display 2019 * system-level windows (such as the status bar notification panel or 2020 * a system alert) which will temporarily take window input focus without 2021 * pausing the foreground activity. 2022 * 2023 * @param hasFocus Whether the window of this activity has focus. 2024 * 2025 * @see #hasWindowFocus() 2026 * @see #onResume 2027 * @see View#onWindowFocusChanged(boolean) 2028 */ 2029 public void onWindowFocusChanged(boolean hasFocus) { 2030 } 2031 2032 /** 2033 * Called when the main window associated with the activity has been 2034 * attached to the window manager. 2035 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2036 * for more information. 2037 * @see View#onAttachedToWindow 2038 */ 2039 public void onAttachedToWindow() { 2040 } 2041 2042 /** 2043 * Called when the main window associated with the activity has been 2044 * detached from the window manager. 2045 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2046 * for more information. 2047 * @see View#onDetachedFromWindow 2048 */ 2049 public void onDetachedFromWindow() { 2050 } 2051 2052 /** 2053 * Returns true if this activity's <em>main</em> window currently has window focus. 2054 * Note that this is not the same as the view itself having focus. 2055 * 2056 * @return True if this activity's main window currently has window focus. 2057 * 2058 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2059 */ 2060 public boolean hasWindowFocus() { 2061 Window w = getWindow(); 2062 if (w != null) { 2063 View d = w.getDecorView(); 2064 if (d != null) { 2065 return d.hasWindowFocus(); 2066 } 2067 } 2068 return false; 2069 } 2070 2071 /** 2072 * Called to process key events. You can override this to intercept all 2073 * key events before they are dispatched to the window. Be sure to call 2074 * this implementation for key events that should be handled normally. 2075 * 2076 * @param event The key event. 2077 * 2078 * @return boolean Return true if this event was consumed. 2079 */ 2080 public boolean dispatchKeyEvent(KeyEvent event) { 2081 onUserInteraction(); 2082 Window win = getWindow(); 2083 if (win.superDispatchKeyEvent(event)) { 2084 return true; 2085 } 2086 View decor = mDecor; 2087 if (decor == null) decor = win.getDecorView(); 2088 return event.dispatch(this, decor != null 2089 ? decor.getKeyDispatcherState() : null, this); 2090 } 2091 2092 /** 2093 * Called to process touch screen events. You can override this to 2094 * intercept all touch screen events before they are dispatched to the 2095 * window. Be sure to call this implementation for touch screen events 2096 * that should be handled normally. 2097 * 2098 * @param ev The touch screen event. 2099 * 2100 * @return boolean Return true if this event was consumed. 2101 */ 2102 public boolean dispatchTouchEvent(MotionEvent ev) { 2103 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2104 onUserInteraction(); 2105 } 2106 if (getWindow().superDispatchTouchEvent(ev)) { 2107 return true; 2108 } 2109 return onTouchEvent(ev); 2110 } 2111 2112 /** 2113 * Called to process trackball events. You can override this to 2114 * intercept all trackball events before they are dispatched to the 2115 * window. Be sure to call this implementation for trackball events 2116 * that should be handled normally. 2117 * 2118 * @param ev The trackball event. 2119 * 2120 * @return boolean Return true if this event was consumed. 2121 */ 2122 public boolean dispatchTrackballEvent(MotionEvent ev) { 2123 onUserInteraction(); 2124 if (getWindow().superDispatchTrackballEvent(ev)) { 2125 return true; 2126 } 2127 return onTrackballEvent(ev); 2128 } 2129 2130 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2131 event.setClassName(getClass().getName()); 2132 event.setPackageName(getPackageName()); 2133 2134 LayoutParams params = getWindow().getAttributes(); 2135 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2136 (params.height == LayoutParams.MATCH_PARENT); 2137 event.setFullScreen(isFullScreen); 2138 2139 CharSequence title = getTitle(); 2140 if (!TextUtils.isEmpty(title)) { 2141 event.getText().add(title); 2142 } 2143 2144 return true; 2145 } 2146 2147 /** 2148 * Default implementation of 2149 * {@link android.view.Window.Callback#onCreatePanelView} 2150 * for activities. This 2151 * simply returns null so that all panel sub-windows will have the default 2152 * menu behavior. 2153 */ 2154 public View onCreatePanelView(int featureId) { 2155 return null; 2156 } 2157 2158 /** 2159 * Default implementation of 2160 * {@link android.view.Window.Callback#onCreatePanelMenu} 2161 * for activities. This calls through to the new 2162 * {@link #onCreateOptionsMenu} method for the 2163 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2164 * so that subclasses of Activity don't need to deal with feature codes. 2165 */ 2166 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2167 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2168 return onCreateOptionsMenu(menu); 2169 } 2170 return false; 2171 } 2172 2173 /** 2174 * Default implementation of 2175 * {@link android.view.Window.Callback#onPreparePanel} 2176 * for activities. This 2177 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2178 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2179 * panel, so that subclasses of 2180 * Activity don't need to deal with feature codes. 2181 */ 2182 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2183 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2184 boolean goforit = onPrepareOptionsMenu(menu); 2185 return goforit && menu.hasVisibleItems(); 2186 } 2187 return true; 2188 } 2189 2190 /** 2191 * {@inheritDoc} 2192 * 2193 * @return The default implementation returns true. 2194 */ 2195 public boolean onMenuOpened(int featureId, Menu menu) { 2196 return true; 2197 } 2198 2199 /** 2200 * Default implementation of 2201 * {@link android.view.Window.Callback#onMenuItemSelected} 2202 * for activities. This calls through to the new 2203 * {@link #onOptionsItemSelected} method for the 2204 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2205 * panel, so that subclasses of 2206 * Activity don't need to deal with feature codes. 2207 */ 2208 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2209 switch (featureId) { 2210 case Window.FEATURE_OPTIONS_PANEL: 2211 // Put event logging here so it gets called even if subclass 2212 // doesn't call through to superclass's implmeentation of each 2213 // of these methods below 2214 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2215 return onOptionsItemSelected(item); 2216 2217 case Window.FEATURE_CONTEXT_MENU: 2218 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2219 return onContextItemSelected(item); 2220 2221 default: 2222 return false; 2223 } 2224 } 2225 2226 /** 2227 * Default implementation of 2228 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2229 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2230 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2231 * so that subclasses of Activity don't need to deal with feature codes. 2232 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2233 * {@link #onContextMenuClosed(Menu)} will be called. 2234 */ 2235 public void onPanelClosed(int featureId, Menu menu) { 2236 switch (featureId) { 2237 case Window.FEATURE_OPTIONS_PANEL: 2238 onOptionsMenuClosed(menu); 2239 break; 2240 2241 case Window.FEATURE_CONTEXT_MENU: 2242 onContextMenuClosed(menu); 2243 break; 2244 } 2245 } 2246 2247 /** 2248 * Initialize the contents of the Activity's standard options menu. You 2249 * should place your menu items in to <var>menu</var>. 2250 * 2251 * <p>This is only called once, the first time the options menu is 2252 * displayed. To update the menu every time it is displayed, see 2253 * {@link #onPrepareOptionsMenu}. 2254 * 2255 * <p>The default implementation populates the menu with standard system 2256 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2257 * they will be correctly ordered with application-defined menu items. 2258 * Deriving classes should always call through to the base implementation. 2259 * 2260 * <p>You can safely hold on to <var>menu</var> (and any items created 2261 * from it), making modifications to it as desired, until the next 2262 * time onCreateOptionsMenu() is called. 2263 * 2264 * <p>When you add items to the menu, you can implement the Activity's 2265 * {@link #onOptionsItemSelected} method to handle them there. 2266 * 2267 * @param menu The options menu in which you place your items. 2268 * 2269 * @return You must return true for the menu to be displayed; 2270 * if you return false it will not be shown. 2271 * 2272 * @see #onPrepareOptionsMenu 2273 * @see #onOptionsItemSelected 2274 */ 2275 public boolean onCreateOptionsMenu(Menu menu) { 2276 if (mParent != null) { 2277 return mParent.onCreateOptionsMenu(menu); 2278 } 2279 return true; 2280 } 2281 2282 /** 2283 * Prepare the Screen's standard options menu to be displayed. This is 2284 * called right before the menu is shown, every time it is shown. You can 2285 * use this method to efficiently enable/disable items or otherwise 2286 * dynamically modify the contents. 2287 * 2288 * <p>The default implementation updates the system menu items based on the 2289 * activity's state. Deriving classes should always call through to the 2290 * base class implementation. 2291 * 2292 * @param menu The options menu as last shown or first initialized by 2293 * onCreateOptionsMenu(). 2294 * 2295 * @return You must return true for the menu to be displayed; 2296 * if you return false it will not be shown. 2297 * 2298 * @see #onCreateOptionsMenu 2299 */ 2300 public boolean onPrepareOptionsMenu(Menu menu) { 2301 if (mParent != null) { 2302 return mParent.onPrepareOptionsMenu(menu); 2303 } 2304 return true; 2305 } 2306 2307 /** 2308 * This hook is called whenever an item in your options menu is selected. 2309 * The default implementation simply returns false to have the normal 2310 * processing happen (calling the item's Runnable or sending a message to 2311 * its Handler as appropriate). You can use this method for any items 2312 * for which you would like to do processing without those other 2313 * facilities. 2314 * 2315 * <p>Derived classes should call through to the base class for it to 2316 * perform the default menu handling. 2317 * 2318 * @param item The menu item that was selected. 2319 * 2320 * @return boolean Return false to allow normal menu processing to 2321 * proceed, true to consume it here. 2322 * 2323 * @see #onCreateOptionsMenu 2324 */ 2325 public boolean onOptionsItemSelected(MenuItem item) { 2326 if (mParent != null) { 2327 return mParent.onOptionsItemSelected(item); 2328 } 2329 return false; 2330 } 2331 2332 /** 2333 * This hook is called whenever the options menu is being closed (either by the user canceling 2334 * the menu with the back/menu button, or when an item is selected). 2335 * 2336 * @param menu The options menu as last shown or first initialized by 2337 * onCreateOptionsMenu(). 2338 */ 2339 public void onOptionsMenuClosed(Menu menu) { 2340 if (mParent != null) { 2341 mParent.onOptionsMenuClosed(menu); 2342 } 2343 } 2344 2345 /** 2346 * Programmatically opens the options menu. If the options menu is already 2347 * open, this method does nothing. 2348 */ 2349 public void openOptionsMenu() { 2350 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2351 } 2352 2353 /** 2354 * Progammatically closes the options menu. If the options menu is already 2355 * closed, this method does nothing. 2356 */ 2357 public void closeOptionsMenu() { 2358 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2359 } 2360 2361 /** 2362 * Called when a context menu for the {@code view} is about to be shown. 2363 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2364 * time the context menu is about to be shown and should be populated for 2365 * the view (or item inside the view for {@link AdapterView} subclasses, 2366 * this can be found in the {@code menuInfo})). 2367 * <p> 2368 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2369 * item has been selected. 2370 * <p> 2371 * It is not safe to hold onto the context menu after this method returns. 2372 * {@inheritDoc} 2373 */ 2374 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2375 } 2376 2377 /** 2378 * Registers a context menu to be shown for the given view (multiple views 2379 * can show the context menu). This method will set the 2380 * {@link OnCreateContextMenuListener} on the view to this activity, so 2381 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2382 * called when it is time to show the context menu. 2383 * 2384 * @see #unregisterForContextMenu(View) 2385 * @param view The view that should show a context menu. 2386 */ 2387 public void registerForContextMenu(View view) { 2388 view.setOnCreateContextMenuListener(this); 2389 } 2390 2391 /** 2392 * Prevents a context menu to be shown for the given view. This method will remove the 2393 * {@link OnCreateContextMenuListener} on the view. 2394 * 2395 * @see #registerForContextMenu(View) 2396 * @param view The view that should stop showing a context menu. 2397 */ 2398 public void unregisterForContextMenu(View view) { 2399 view.setOnCreateContextMenuListener(null); 2400 } 2401 2402 /** 2403 * Programmatically opens the context menu for a particular {@code view}. 2404 * The {@code view} should have been added via 2405 * {@link #registerForContextMenu(View)}. 2406 * 2407 * @param view The view to show the context menu for. 2408 */ 2409 public void openContextMenu(View view) { 2410 view.showContextMenu(); 2411 } 2412 2413 /** 2414 * Programmatically closes the most recently opened context menu, if showing. 2415 */ 2416 public void closeContextMenu() { 2417 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2418 } 2419 2420 /** 2421 * This hook is called whenever an item in a context menu is selected. The 2422 * default implementation simply returns false to have the normal processing 2423 * happen (calling the item's Runnable or sending a message to its Handler 2424 * as appropriate). You can use this method for any items for which you 2425 * would like to do processing without those other facilities. 2426 * <p> 2427 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2428 * View that added this menu item. 2429 * <p> 2430 * Derived classes should call through to the base class for it to perform 2431 * the default menu handling. 2432 * 2433 * @param item The context menu item that was selected. 2434 * @return boolean Return false to allow normal context menu processing to 2435 * proceed, true to consume it here. 2436 */ 2437 public boolean onContextItemSelected(MenuItem item) { 2438 if (mParent != null) { 2439 return mParent.onContextItemSelected(item); 2440 } 2441 return false; 2442 } 2443 2444 /** 2445 * This hook is called whenever the context menu is being closed (either by 2446 * the user canceling the menu with the back/menu button, or when an item is 2447 * selected). 2448 * 2449 * @param menu The context menu that is being closed. 2450 */ 2451 public void onContextMenuClosed(Menu menu) { 2452 if (mParent != null) { 2453 mParent.onContextMenuClosed(menu); 2454 } 2455 } 2456 2457 /** 2458 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2459 */ 2460 @Deprecated 2461 protected Dialog onCreateDialog(int id) { 2462 return null; 2463 } 2464 2465 /** 2466 * Callback for creating dialogs that are managed (saved and restored) for you 2467 * by the activity. The default implementation calls through to 2468 * {@link #onCreateDialog(int)} for compatibility. 2469 * 2470 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2471 * this method the first time, and hang onto it thereafter. Any dialog 2472 * that is created by this method will automatically be saved and restored 2473 * for you, including whether it is showing. 2474 * 2475 * <p>If you would like the activity to manage saving and restoring dialogs 2476 * for you, you should override this method and handle any ids that are 2477 * passed to {@link #showDialog}. 2478 * 2479 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2480 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2481 * 2482 * @param id The id of the dialog. 2483 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2484 * @return The dialog. If you return null, the dialog will not be created. 2485 * 2486 * @see #onPrepareDialog(int, Dialog, Bundle) 2487 * @see #showDialog(int, Bundle) 2488 * @see #dismissDialog(int) 2489 * @see #removeDialog(int) 2490 */ 2491 protected Dialog onCreateDialog(int id, Bundle args) { 2492 return onCreateDialog(id); 2493 } 2494 2495 /** 2496 * @deprecated Old no-arguments version of 2497 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2498 */ 2499 @Deprecated 2500 protected void onPrepareDialog(int id, Dialog dialog) { 2501 dialog.setOwnerActivity(this); 2502 } 2503 2504 /** 2505 * Provides an opportunity to prepare a managed dialog before it is being 2506 * shown. The default implementation calls through to 2507 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2508 * 2509 * <p> 2510 * Override this if you need to update a managed dialog based on the state 2511 * of the application each time it is shown. For example, a time picker 2512 * dialog might want to be updated with the current time. You should call 2513 * through to the superclass's implementation. The default implementation 2514 * will set this Activity as the owner activity on the Dialog. 2515 * 2516 * @param id The id of the managed dialog. 2517 * @param dialog The dialog. 2518 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2519 * @see #onCreateDialog(int, Bundle) 2520 * @see #showDialog(int) 2521 * @see #dismissDialog(int) 2522 * @see #removeDialog(int) 2523 */ 2524 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 2525 onPrepareDialog(id, dialog); 2526 } 2527 2528 /** 2529 * Simple version of {@link #showDialog(int, Bundle)} that does not 2530 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 2531 * with null arguments. 2532 */ 2533 public final void showDialog(int id) { 2534 showDialog(id, null); 2535 } 2536 2537 /** 2538 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 2539 * will be made with the same id the first time this is called for a given 2540 * id. From thereafter, the dialog will be automatically saved and restored. 2541 * 2542 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 2543 * be made to provide an opportunity to do any timely preparation. 2544 * 2545 * @param id The id of the managed dialog. 2546 * @param args Arguments to pass through to the dialog. These will be saved 2547 * and restored for you. Note that if the dialog is already created, 2548 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 2549 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 2550 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 2551 * @return Returns true if the Dialog was created; false is returned if 2552 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 2553 * 2554 * @see Dialog 2555 * @see #onCreateDialog(int, Bundle) 2556 * @see #onPrepareDialog(int, Dialog, Bundle) 2557 * @see #dismissDialog(int) 2558 * @see #removeDialog(int) 2559 */ 2560 public final boolean showDialog(int id, Bundle args) { 2561 if (mManagedDialogs == null) { 2562 mManagedDialogs = new SparseArray<ManagedDialog>(); 2563 } 2564 ManagedDialog md = mManagedDialogs.get(id); 2565 if (md == null) { 2566 md = new ManagedDialog(); 2567 md.mDialog = createDialog(id, null, args); 2568 if (md.mDialog == null) { 2569 return false; 2570 } 2571 mManagedDialogs.put(id, md); 2572 } 2573 2574 md.mArgs = args; 2575 onPrepareDialog(id, md.mDialog, args); 2576 md.mDialog.show(); 2577 return true; 2578 } 2579 2580 /** 2581 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 2582 * 2583 * @param id The id of the managed dialog. 2584 * 2585 * @throws IllegalArgumentException if the id was not previously shown via 2586 * {@link #showDialog(int)}. 2587 * 2588 * @see #onCreateDialog(int, Bundle) 2589 * @see #onPrepareDialog(int, Dialog, Bundle) 2590 * @see #showDialog(int) 2591 * @see #removeDialog(int) 2592 */ 2593 public final void dismissDialog(int id) { 2594 if (mManagedDialogs == null) { 2595 throw missingDialog(id); 2596 } 2597 2598 final ManagedDialog md = mManagedDialogs.get(id); 2599 if (md == null) { 2600 throw missingDialog(id); 2601 } 2602 md.mDialog.dismiss(); 2603 } 2604 2605 /** 2606 * Creates an exception to throw if a user passed in a dialog id that is 2607 * unexpected. 2608 */ 2609 private IllegalArgumentException missingDialog(int id) { 2610 return new IllegalArgumentException("no dialog with id " + id + " was ever " 2611 + "shown via Activity#showDialog"); 2612 } 2613 2614 /** 2615 * Removes any internal references to a dialog managed by this Activity. 2616 * If the dialog is showing, it will dismiss it as part of the clean up. 2617 * 2618 * <p>This can be useful if you know that you will never show a dialog again and 2619 * want to avoid the overhead of saving and restoring it in the future. 2620 * 2621 * @param id The id of the managed dialog. 2622 * 2623 * @see #onCreateDialog(int, Bundle) 2624 * @see #onPrepareDialog(int, Dialog, Bundle) 2625 * @see #showDialog(int) 2626 * @see #dismissDialog(int) 2627 */ 2628 public final void removeDialog(int id) { 2629 if (mManagedDialogs == null) { 2630 return; 2631 } 2632 2633 final ManagedDialog md = mManagedDialogs.get(id); 2634 if (md == null) { 2635 return; 2636 } 2637 2638 md.mDialog.dismiss(); 2639 mManagedDialogs.remove(id); 2640 } 2641 2642 /** 2643 * This hook is called when the user signals the desire to start a search. 2644 * 2645 * <p>You can use this function as a simple way to launch the search UI, in response to a 2646 * menu item, search button, or other widgets within your activity. Unless overidden, 2647 * calling this function is the same as calling 2648 * {@link #startSearch startSearch(null, false, null, false)}, which launches 2649 * search for the current activity as specified in its manifest, see {@link SearchManager}. 2650 * 2651 * <p>You can override this function to force global search, e.g. in response to a dedicated 2652 * search key, or to block search entirely (by simply returning false). 2653 * 2654 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 2655 * The default implementation always returns {@code true}. 2656 * 2657 * @see android.app.SearchManager 2658 */ 2659 public boolean onSearchRequested() { 2660 startSearch(null, false, null, false); 2661 return true; 2662 } 2663 2664 /** 2665 * This hook is called to launch the search UI. 2666 * 2667 * <p>It is typically called from onSearchRequested(), either directly from 2668 * Activity.onSearchRequested() or from an overridden version in any given 2669 * Activity. If your goal is simply to activate search, it is preferred to call 2670 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 2671 * is to inject specific data such as context data, it is preferred to <i>override</i> 2672 * onSearchRequested(), so that any callers to it will benefit from the override. 2673 * 2674 * @param initialQuery Any non-null non-empty string will be inserted as 2675 * pre-entered text in the search query box. 2676 * @param selectInitialQuery If true, the intial query will be preselected, which means that 2677 * any further typing will replace it. This is useful for cases where an entire pre-formed 2678 * query is being inserted. If false, the selection point will be placed at the end of the 2679 * inserted query. This is useful when the inserted query is text that the user entered, 2680 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 2681 * if initialQuery is a non-empty string.</i> 2682 * @param appSearchData An application can insert application-specific 2683 * context here, in order to improve quality or specificity of its own 2684 * searches. This data will be returned with SEARCH intent(s). Null if 2685 * no extra data is required. 2686 * @param globalSearch If false, this will only launch the search that has been specifically 2687 * defined by the application (which is usually defined as a local search). If no default 2688 * search is defined in the current application or activity, global search will be launched. 2689 * If true, this will always launch a platform-global (e.g. web-based) search instead. 2690 * 2691 * @see android.app.SearchManager 2692 * @see #onSearchRequested 2693 */ 2694 public void startSearch(String initialQuery, boolean selectInitialQuery, 2695 Bundle appSearchData, boolean globalSearch) { 2696 ensureSearchManager(); 2697 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 2698 appSearchData, globalSearch); 2699 } 2700 2701 /** 2702 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 2703 * the search dialog. Made available for testing purposes. 2704 * 2705 * @param query The query to trigger. If empty, the request will be ignored. 2706 * @param appSearchData An application can insert application-specific 2707 * context here, in order to improve quality or specificity of its own 2708 * searches. This data will be returned with SEARCH intent(s). Null if 2709 * no extra data is required. 2710 */ 2711 public void triggerSearch(String query, Bundle appSearchData) { 2712 ensureSearchManager(); 2713 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 2714 } 2715 2716 /** 2717 * Request that key events come to this activity. Use this if your 2718 * activity has no views with focus, but the activity still wants 2719 * a chance to process key events. 2720 * 2721 * @see android.view.Window#takeKeyEvents 2722 */ 2723 public void takeKeyEvents(boolean get) { 2724 getWindow().takeKeyEvents(get); 2725 } 2726 2727 /** 2728 * Enable extended window features. This is a convenience for calling 2729 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 2730 * 2731 * @param featureId The desired feature as defined in 2732 * {@link android.view.Window}. 2733 * @return Returns true if the requested feature is supported and now 2734 * enabled. 2735 * 2736 * @see android.view.Window#requestFeature 2737 */ 2738 public final boolean requestWindowFeature(int featureId) { 2739 return getWindow().requestFeature(featureId); 2740 } 2741 2742 /** 2743 * Convenience for calling 2744 * {@link android.view.Window#setFeatureDrawableResource}. 2745 */ 2746 public final void setFeatureDrawableResource(int featureId, int resId) { 2747 getWindow().setFeatureDrawableResource(featureId, resId); 2748 } 2749 2750 /** 2751 * Convenience for calling 2752 * {@link android.view.Window#setFeatureDrawableUri}. 2753 */ 2754 public final void setFeatureDrawableUri(int featureId, Uri uri) { 2755 getWindow().setFeatureDrawableUri(featureId, uri); 2756 } 2757 2758 /** 2759 * Convenience for calling 2760 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 2761 */ 2762 public final void setFeatureDrawable(int featureId, Drawable drawable) { 2763 getWindow().setFeatureDrawable(featureId, drawable); 2764 } 2765 2766 /** 2767 * Convenience for calling 2768 * {@link android.view.Window#setFeatureDrawableAlpha}. 2769 */ 2770 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 2771 getWindow().setFeatureDrawableAlpha(featureId, alpha); 2772 } 2773 2774 /** 2775 * Convenience for calling 2776 * {@link android.view.Window#getLayoutInflater}. 2777 */ 2778 public LayoutInflater getLayoutInflater() { 2779 return getWindow().getLayoutInflater(); 2780 } 2781 2782 /** 2783 * Returns a {@link MenuInflater} with this context. 2784 */ 2785 public MenuInflater getMenuInflater() { 2786 return new MenuInflater(this); 2787 } 2788 2789 @Override 2790 protected void onApplyThemeResource(Resources.Theme theme, int resid, 2791 boolean first) { 2792 if (mParent == null) { 2793 super.onApplyThemeResource(theme, resid, first); 2794 } else { 2795 try { 2796 theme.setTo(mParent.getTheme()); 2797 } catch (Exception e) { 2798 // Empty 2799 } 2800 theme.applyStyle(resid, false); 2801 } 2802 } 2803 2804 /** 2805 * Launch an activity for which you would like a result when it finished. 2806 * When this activity exits, your 2807 * onActivityResult() method will be called with the given requestCode. 2808 * Using a negative requestCode is the same as calling 2809 * {@link #startActivity} (the activity is not launched as a sub-activity). 2810 * 2811 * <p>Note that this method should only be used with Intent protocols 2812 * that are defined to return a result. In other protocols (such as 2813 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 2814 * not get the result when you expect. For example, if the activity you 2815 * are launching uses the singleTask launch mode, it will not run in your 2816 * task and thus you will immediately receive a cancel result. 2817 * 2818 * <p>As a special case, if you call startActivityForResult() with a requestCode 2819 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 2820 * activity, then your window will not be displayed until a result is 2821 * returned back from the started activity. This is to avoid visible 2822 * flickering when redirecting to another activity. 2823 * 2824 * <p>This method throws {@link android.content.ActivityNotFoundException} 2825 * if there was no Activity found to run the given Intent. 2826 * 2827 * @param intent The intent to start. 2828 * @param requestCode If >= 0, this code will be returned in 2829 * onActivityResult() when the activity exits. 2830 * 2831 * @throws android.content.ActivityNotFoundException 2832 * 2833 * @see #startActivity 2834 */ 2835 public void startActivityForResult(Intent intent, int requestCode) { 2836 if (mParent == null) { 2837 Instrumentation.ActivityResult ar = 2838 mInstrumentation.execStartActivity( 2839 this, mMainThread.getApplicationThread(), mToken, this, 2840 intent, requestCode); 2841 if (ar != null) { 2842 mMainThread.sendActivityResult( 2843 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 2844 ar.getResultData()); 2845 } 2846 if (requestCode >= 0) { 2847 // If this start is requesting a result, we can avoid making 2848 // the activity visible until the result is received. Setting 2849 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 2850 // activity hidden during this time, to avoid flickering. 2851 // This can only be done when a result is requested because 2852 // that guarantees we will get information back when the 2853 // activity is finished, no matter what happens to it. 2854 mStartedActivity = true; 2855 } 2856 } else { 2857 mParent.startActivityFromChild(this, intent, requestCode); 2858 } 2859 } 2860 2861 /** 2862 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 2863 * to use a IntentSender to describe the activity to be started. If 2864 * the IntentSender is for an activity, that activity will be started 2865 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 2866 * here; otherwise, its associated action will be executed (such as 2867 * sending a broadcast) as if you had called 2868 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 2869 * 2870 * @param intent The IntentSender to launch. 2871 * @param requestCode If >= 0, this code will be returned in 2872 * onActivityResult() when the activity exits. 2873 * @param fillInIntent If non-null, this will be provided as the 2874 * intent parameter to {@link IntentSender#sendIntent}. 2875 * @param flagsMask Intent flags in the original IntentSender that you 2876 * would like to change. 2877 * @param flagsValues Desired values for any bits set in 2878 * <var>flagsMask</var> 2879 * @param extraFlags Always set to 0. 2880 */ 2881 public void startIntentSenderForResult(IntentSender intent, int requestCode, 2882 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 2883 throws IntentSender.SendIntentException { 2884 if (mParent == null) { 2885 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 2886 flagsMask, flagsValues, this); 2887 } else { 2888 mParent.startIntentSenderFromChild(this, intent, requestCode, 2889 fillInIntent, flagsMask, flagsValues, extraFlags); 2890 } 2891 } 2892 2893 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 2894 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity) 2895 throws IntentSender.SendIntentException { 2896 try { 2897 String resolvedType = null; 2898 if (fillInIntent != null) { 2899 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 2900 } 2901 int result = ActivityManagerNative.getDefault() 2902 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 2903 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 2904 requestCode, flagsMask, flagsValues); 2905 if (result == IActivityManager.START_CANCELED) { 2906 throw new IntentSender.SendIntentException(); 2907 } 2908 Instrumentation.checkStartActivityResult(result, null); 2909 } catch (RemoteException e) { 2910 } 2911 if (requestCode >= 0) { 2912 // If this start is requesting a result, we can avoid making 2913 // the activity visible until the result is received. Setting 2914 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 2915 // activity hidden during this time, to avoid flickering. 2916 // This can only be done when a result is requested because 2917 // that guarantees we will get information back when the 2918 // activity is finished, no matter what happens to it. 2919 mStartedActivity = true; 2920 } 2921 } 2922 2923 /** 2924 * Launch a new activity. You will not receive any information about when 2925 * the activity exits. This implementation overrides the base version, 2926 * providing information about 2927 * the activity performing the launch. Because of this additional 2928 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 2929 * required; if not specified, the new activity will be added to the 2930 * task of the caller. 2931 * 2932 * <p>This method throws {@link android.content.ActivityNotFoundException} 2933 * if there was no Activity found to run the given Intent. 2934 * 2935 * @param intent The intent to start. 2936 * 2937 * @throws android.content.ActivityNotFoundException 2938 * 2939 * @see #startActivityForResult 2940 */ 2941 @Override 2942 public void startActivity(Intent intent) { 2943 startActivityForResult(intent, -1); 2944 } 2945 2946 /** 2947 * Like {@link #startActivity(Intent)}, but taking a IntentSender 2948 * to start; see 2949 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 2950 * for more information. 2951 * 2952 * @param intent The IntentSender to launch. 2953 * @param fillInIntent If non-null, this will be provided as the 2954 * intent parameter to {@link IntentSender#sendIntent}. 2955 * @param flagsMask Intent flags in the original IntentSender that you 2956 * would like to change. 2957 * @param flagsValues Desired values for any bits set in 2958 * <var>flagsMask</var> 2959 * @param extraFlags Always set to 0. 2960 */ 2961 public void startIntentSender(IntentSender intent, 2962 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 2963 throws IntentSender.SendIntentException { 2964 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 2965 flagsValues, extraFlags); 2966 } 2967 2968 /** 2969 * A special variation to launch an activity only if a new activity 2970 * instance is needed to handle the given Intent. In other words, this is 2971 * just like {@link #startActivityForResult(Intent, int)} except: if you are 2972 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 2973 * singleTask or singleTop 2974 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 2975 * and the activity 2976 * that handles <var>intent</var> is the same as your currently running 2977 * activity, then a new instance is not needed. In this case, instead of 2978 * the normal behavior of calling {@link #onNewIntent} this function will 2979 * return and you can handle the Intent yourself. 2980 * 2981 * <p>This function can only be called from a top-level activity; if it is 2982 * called from a child activity, a runtime exception will be thrown. 2983 * 2984 * @param intent The intent to start. 2985 * @param requestCode If >= 0, this code will be returned in 2986 * onActivityResult() when the activity exits, as described in 2987 * {@link #startActivityForResult}. 2988 * 2989 * @return If a new activity was launched then true is returned; otherwise 2990 * false is returned and you must handle the Intent yourself. 2991 * 2992 * @see #startActivity 2993 * @see #startActivityForResult 2994 */ 2995 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 2996 if (mParent == null) { 2997 int result = IActivityManager.START_RETURN_INTENT_TO_CALLER; 2998 try { 2999 result = ActivityManagerNative.getDefault() 3000 .startActivity(mMainThread.getApplicationThread(), 3001 intent, intent.resolveTypeIfNeeded( 3002 getContentResolver()), 3003 null, 0, 3004 mToken, mEmbeddedID, requestCode, true, false); 3005 } catch (RemoteException e) { 3006 // Empty 3007 } 3008 3009 Instrumentation.checkStartActivityResult(result, intent); 3010 3011 if (requestCode >= 0) { 3012 // If this start is requesting a result, we can avoid making 3013 // the activity visible until the result is received. Setting 3014 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3015 // activity hidden during this time, to avoid flickering. 3016 // This can only be done when a result is requested because 3017 // that guarantees we will get information back when the 3018 // activity is finished, no matter what happens to it. 3019 mStartedActivity = true; 3020 } 3021 return result != IActivityManager.START_RETURN_INTENT_TO_CALLER; 3022 } 3023 3024 throw new UnsupportedOperationException( 3025 "startActivityIfNeeded can only be called from a top-level activity"); 3026 } 3027 3028 /** 3029 * Special version of starting an activity, for use when you are replacing 3030 * other activity components. You can use this to hand the Intent off 3031 * to the next Activity that can handle it. You typically call this in 3032 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3033 * 3034 * @param intent The intent to dispatch to the next activity. For 3035 * correct behavior, this must be the same as the Intent that started 3036 * your own activity; the only changes you can make are to the extras 3037 * inside of it. 3038 * 3039 * @return Returns a boolean indicating whether there was another Activity 3040 * to start: true if there was a next activity to start, false if there 3041 * wasn't. In general, if true is returned you will then want to call 3042 * finish() on yourself. 3043 */ 3044 public boolean startNextMatchingActivity(Intent intent) { 3045 if (mParent == null) { 3046 try { 3047 return ActivityManagerNative.getDefault() 3048 .startNextMatchingActivity(mToken, intent); 3049 } catch (RemoteException e) { 3050 // Empty 3051 } 3052 return false; 3053 } 3054 3055 throw new UnsupportedOperationException( 3056 "startNextMatchingActivity can only be called from a top-level activity"); 3057 } 3058 3059 /** 3060 * This is called when a child activity of this one calls its 3061 * {@link #startActivity} or {@link #startActivityForResult} method. 3062 * 3063 * <p>This method throws {@link android.content.ActivityNotFoundException} 3064 * if there was no Activity found to run the given Intent. 3065 * 3066 * @param child The activity making the call. 3067 * @param intent The intent to start. 3068 * @param requestCode Reply request code. < 0 if reply is not requested. 3069 * 3070 * @throws android.content.ActivityNotFoundException 3071 * 3072 * @see #startActivity 3073 * @see #startActivityForResult 3074 */ 3075 public void startActivityFromChild(Activity child, Intent intent, 3076 int requestCode) { 3077 Instrumentation.ActivityResult ar = 3078 mInstrumentation.execStartActivity( 3079 this, mMainThread.getApplicationThread(), mToken, child, 3080 intent, requestCode); 3081 if (ar != null) { 3082 mMainThread.sendActivityResult( 3083 mToken, child.mEmbeddedID, requestCode, 3084 ar.getResultCode(), ar.getResultData()); 3085 } 3086 } 3087 3088 /** 3089 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3090 * taking a IntentSender; see 3091 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3092 * for more information. 3093 */ 3094 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3095 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3096 int extraFlags) 3097 throws IntentSender.SendIntentException { 3098 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3099 flagsMask, flagsValues, child); 3100 } 3101 3102 /** 3103 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3104 * or {@link #finish} to specify an explicit transition animation to 3105 * perform next. 3106 * @param enterAnim A resource ID of the animation resource to use for 3107 * the incoming activity. Use 0 for no animation. 3108 * @param exitAnim A resource ID of the animation resource to use for 3109 * the outgoing activity. Use 0 for no animation. 3110 */ 3111 public void overridePendingTransition(int enterAnim, int exitAnim) { 3112 try { 3113 ActivityManagerNative.getDefault().overridePendingTransition( 3114 mToken, getPackageName(), enterAnim, exitAnim); 3115 } catch (RemoteException e) { 3116 } 3117 } 3118 3119 /** 3120 * Call this to set the result that your activity will return to its 3121 * caller. 3122 * 3123 * @param resultCode The result code to propagate back to the originating 3124 * activity, often RESULT_CANCELED or RESULT_OK 3125 * 3126 * @see #RESULT_CANCELED 3127 * @see #RESULT_OK 3128 * @see #RESULT_FIRST_USER 3129 * @see #setResult(int, Intent) 3130 */ 3131 public final void setResult(int resultCode) { 3132 synchronized (this) { 3133 mResultCode = resultCode; 3134 mResultData = null; 3135 } 3136 } 3137 3138 /** 3139 * Call this to set the result that your activity will return to its 3140 * caller. 3141 * 3142 * @param resultCode The result code to propagate back to the originating 3143 * activity, often RESULT_CANCELED or RESULT_OK 3144 * @param data The data to propagate back to the originating activity. 3145 * 3146 * @see #RESULT_CANCELED 3147 * @see #RESULT_OK 3148 * @see #RESULT_FIRST_USER 3149 * @see #setResult(int) 3150 */ 3151 public final void setResult(int resultCode, Intent data) { 3152 synchronized (this) { 3153 mResultCode = resultCode; 3154 mResultData = data; 3155 } 3156 } 3157 3158 /** 3159 * Return the name of the package that invoked this activity. This is who 3160 * the data in {@link #setResult setResult()} will be sent to. You can 3161 * use this information to validate that the recipient is allowed to 3162 * receive the data. 3163 * 3164 * <p>Note: if the calling activity is not expecting a result (that is it 3165 * did not use the {@link #startActivityForResult} 3166 * form that includes a request code), then the calling package will be 3167 * null. 3168 * 3169 * @return The package of the activity that will receive your 3170 * reply, or null if none. 3171 */ 3172 public String getCallingPackage() { 3173 try { 3174 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 3175 } catch (RemoteException e) { 3176 return null; 3177 } 3178 } 3179 3180 /** 3181 * Return the name of the activity that invoked this activity. This is 3182 * who the data in {@link #setResult setResult()} will be sent to. You 3183 * can use this information to validate that the recipient is allowed to 3184 * receive the data. 3185 * 3186 * <p>Note: if the calling activity is not expecting a result (that is it 3187 * did not use the {@link #startActivityForResult} 3188 * form that includes a request code), then the calling package will be 3189 * null. 3190 * 3191 * @return String The full name of the activity that will receive your 3192 * reply, or null if none. 3193 */ 3194 public ComponentName getCallingActivity() { 3195 try { 3196 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 3197 } catch (RemoteException e) { 3198 return null; 3199 } 3200 } 3201 3202 /** 3203 * Control whether this activity's main window is visible. This is intended 3204 * only for the special case of an activity that is not going to show a 3205 * UI itself, but can't just finish prior to onResume() because it needs 3206 * to wait for a service binding or such. Setting this to false allows 3207 * you to prevent your UI from being shown during that time. 3208 * 3209 * <p>The default value for this is taken from the 3210 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 3211 */ 3212 public void setVisible(boolean visible) { 3213 if (mVisibleFromClient != visible) { 3214 mVisibleFromClient = visible; 3215 if (mVisibleFromServer) { 3216 if (visible) makeVisible(); 3217 else mDecor.setVisibility(View.INVISIBLE); 3218 } 3219 } 3220 } 3221 3222 void makeVisible() { 3223 if (!mWindowAdded) { 3224 ViewManager wm = getWindowManager(); 3225 wm.addView(mDecor, getWindow().getAttributes()); 3226 mWindowAdded = true; 3227 } 3228 mDecor.setVisibility(View.VISIBLE); 3229 } 3230 3231 /** 3232 * Check to see whether this activity is in the process of finishing, 3233 * either because you called {@link #finish} on it or someone else 3234 * has requested that it finished. This is often used in 3235 * {@link #onPause} to determine whether the activity is simply pausing or 3236 * completely finishing. 3237 * 3238 * @return If the activity is finishing, returns true; else returns false. 3239 * 3240 * @see #finish 3241 */ 3242 public boolean isFinishing() { 3243 return mFinished; 3244 } 3245 3246 /** 3247 * Call this when your activity is done and should be closed. The 3248 * ActivityResult is propagated back to whoever launched you via 3249 * onActivityResult(). 3250 */ 3251 public void finish() { 3252 if (mParent == null) { 3253 int resultCode; 3254 Intent resultData; 3255 synchronized (this) { 3256 resultCode = mResultCode; 3257 resultData = mResultData; 3258 } 3259 if (Config.LOGV) Log.v(TAG, "Finishing self: token=" + mToken); 3260 try { 3261 if (ActivityManagerNative.getDefault() 3262 .finishActivity(mToken, resultCode, resultData)) { 3263 mFinished = true; 3264 } 3265 } catch (RemoteException e) { 3266 // Empty 3267 } 3268 } else { 3269 mParent.finishFromChild(this); 3270 } 3271 } 3272 3273 /** 3274 * This is called when a child activity of this one calls its 3275 * {@link #finish} method. The default implementation simply calls 3276 * finish() on this activity (the parent), finishing the entire group. 3277 * 3278 * @param child The activity making the call. 3279 * 3280 * @see #finish 3281 */ 3282 public void finishFromChild(Activity child) { 3283 finish(); 3284 } 3285 3286 /** 3287 * Force finish another activity that you had previously started with 3288 * {@link #startActivityForResult}. 3289 * 3290 * @param requestCode The request code of the activity that you had 3291 * given to startActivityForResult(). If there are multiple 3292 * activities started with this request code, they 3293 * will all be finished. 3294 */ 3295 public void finishActivity(int requestCode) { 3296 if (mParent == null) { 3297 try { 3298 ActivityManagerNative.getDefault() 3299 .finishSubActivity(mToken, mEmbeddedID, requestCode); 3300 } catch (RemoteException e) { 3301 // Empty 3302 } 3303 } else { 3304 mParent.finishActivityFromChild(this, requestCode); 3305 } 3306 } 3307 3308 /** 3309 * This is called when a child activity of this one calls its 3310 * finishActivity(). 3311 * 3312 * @param child The activity making the call. 3313 * @param requestCode Request code that had been used to start the 3314 * activity. 3315 */ 3316 public void finishActivityFromChild(Activity child, int requestCode) { 3317 try { 3318 ActivityManagerNative.getDefault() 3319 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 3320 } catch (RemoteException e) { 3321 // Empty 3322 } 3323 } 3324 3325 /** 3326 * Called when an activity you launched exits, giving you the requestCode 3327 * you started it with, the resultCode it returned, and any additional 3328 * data from it. The <var>resultCode</var> will be 3329 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 3330 * didn't return any result, or crashed during its operation. 3331 * 3332 * <p>You will receive this call immediately before onResume() when your 3333 * activity is re-starting. 3334 * 3335 * @param requestCode The integer request code originally supplied to 3336 * startActivityForResult(), allowing you to identify who this 3337 * result came from. 3338 * @param resultCode The integer result code returned by the child activity 3339 * through its setResult(). 3340 * @param data An Intent, which can return result data to the caller 3341 * (various data can be attached to Intent "extras"). 3342 * 3343 * @see #startActivityForResult 3344 * @see #createPendingResult 3345 * @see #setResult(int) 3346 */ 3347 protected void onActivityResult(int requestCode, int resultCode, 3348 Intent data) { 3349 } 3350 3351 /** 3352 * Create a new PendingIntent object which you can hand to others 3353 * for them to use to send result data back to your 3354 * {@link #onActivityResult} callback. The created object will be either 3355 * one-shot (becoming invalid after a result is sent back) or multiple 3356 * (allowing any number of results to be sent through it). 3357 * 3358 * @param requestCode Private request code for the sender that will be 3359 * associated with the result data when it is returned. The sender can not 3360 * modify this value, allowing you to identify incoming results. 3361 * @param data Default data to supply in the result, which may be modified 3362 * by the sender. 3363 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 3364 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 3365 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 3366 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 3367 * or any of the flags as supported by 3368 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 3369 * of the intent that can be supplied when the actual send happens. 3370 * 3371 * @return Returns an existing or new PendingIntent matching the given 3372 * parameters. May return null only if 3373 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 3374 * supplied. 3375 * 3376 * @see PendingIntent 3377 */ 3378 public PendingIntent createPendingResult(int requestCode, Intent data, 3379 int flags) { 3380 String packageName = getPackageName(); 3381 try { 3382 IIntentSender target = 3383 ActivityManagerNative.getDefault().getIntentSender( 3384 IActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 3385 mParent == null ? mToken : mParent.mToken, 3386 mEmbeddedID, requestCode, data, null, flags); 3387 return target != null ? new PendingIntent(target) : null; 3388 } catch (RemoteException e) { 3389 // Empty 3390 } 3391 return null; 3392 } 3393 3394 /** 3395 * Change the desired orientation of this activity. If the activity 3396 * is currently in the foreground or otherwise impacting the screen 3397 * orientation, the screen will immediately be changed (possibly causing 3398 * the activity to be restarted). Otherwise, this will be used the next 3399 * time the activity is visible. 3400 * 3401 * @param requestedOrientation An orientation constant as used in 3402 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3403 */ 3404 public void setRequestedOrientation(int requestedOrientation) { 3405 if (mParent == null) { 3406 try { 3407 ActivityManagerNative.getDefault().setRequestedOrientation( 3408 mToken, requestedOrientation); 3409 } catch (RemoteException e) { 3410 // Empty 3411 } 3412 } else { 3413 mParent.setRequestedOrientation(requestedOrientation); 3414 } 3415 } 3416 3417 /** 3418 * Return the current requested orientation of the activity. This will 3419 * either be the orientation requested in its component's manifest, or 3420 * the last requested orientation given to 3421 * {@link #setRequestedOrientation(int)}. 3422 * 3423 * @return Returns an orientation constant as used in 3424 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3425 */ 3426 public int getRequestedOrientation() { 3427 if (mParent == null) { 3428 try { 3429 return ActivityManagerNative.getDefault() 3430 .getRequestedOrientation(mToken); 3431 } catch (RemoteException e) { 3432 // Empty 3433 } 3434 } else { 3435 return mParent.getRequestedOrientation(); 3436 } 3437 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 3438 } 3439 3440 /** 3441 * Return the identifier of the task this activity is in. This identifier 3442 * will remain the same for the lifetime of the activity. 3443 * 3444 * @return Task identifier, an opaque integer. 3445 */ 3446 public int getTaskId() { 3447 try { 3448 return ActivityManagerNative.getDefault() 3449 .getTaskForActivity(mToken, false); 3450 } catch (RemoteException e) { 3451 return -1; 3452 } 3453 } 3454 3455 /** 3456 * Return whether this activity is the root of a task. The root is the 3457 * first activity in a task. 3458 * 3459 * @return True if this is the root activity, else false. 3460 */ 3461 public boolean isTaskRoot() { 3462 try { 3463 return ActivityManagerNative.getDefault() 3464 .getTaskForActivity(mToken, true) >= 0; 3465 } catch (RemoteException e) { 3466 return false; 3467 } 3468 } 3469 3470 /** 3471 * Move the task containing this activity to the back of the activity 3472 * stack. The activity's order within the task is unchanged. 3473 * 3474 * @param nonRoot If false then this only works if the activity is the root 3475 * of a task; if true it will work for any activity in 3476 * a task. 3477 * 3478 * @return If the task was moved (or it was already at the 3479 * back) true is returned, else false. 3480 */ 3481 public boolean moveTaskToBack(boolean nonRoot) { 3482 try { 3483 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 3484 mToken, nonRoot); 3485 } catch (RemoteException e) { 3486 // Empty 3487 } 3488 return false; 3489 } 3490 3491 /** 3492 * Returns class name for this activity with the package prefix removed. 3493 * This is the default name used to read and write settings. 3494 * 3495 * @return The local class name. 3496 */ 3497 public String getLocalClassName() { 3498 final String pkg = getPackageName(); 3499 final String cls = mComponent.getClassName(); 3500 int packageLen = pkg.length(); 3501 if (!cls.startsWith(pkg) || cls.length() <= packageLen 3502 || cls.charAt(packageLen) != '.') { 3503 return cls; 3504 } 3505 return cls.substring(packageLen+1); 3506 } 3507 3508 /** 3509 * Returns complete component name of this activity. 3510 * 3511 * @return Returns the complete component name for this activity 3512 */ 3513 public ComponentName getComponentName() 3514 { 3515 return mComponent; 3516 } 3517 3518 /** 3519 * Retrieve a {@link SharedPreferences} object for accessing preferences 3520 * that are private to this activity. This simply calls the underlying 3521 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 3522 * class name as the preferences name. 3523 * 3524 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 3525 * operation, {@link #MODE_WORLD_READABLE} and 3526 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 3527 * 3528 * @return Returns the single SharedPreferences instance that can be used 3529 * to retrieve and modify the preference values. 3530 */ 3531 public SharedPreferences getPreferences(int mode) { 3532 return getSharedPreferences(getLocalClassName(), mode); 3533 } 3534 3535 private void ensureSearchManager() { 3536 if (mSearchManager != null) { 3537 return; 3538 } 3539 3540 mSearchManager = new SearchManager(this, null); 3541 } 3542 3543 @Override 3544 public Object getSystemService(String name) { 3545 if (getBaseContext() == null) { 3546 throw new IllegalStateException( 3547 "System services not available to Activities before onCreate()"); 3548 } 3549 3550 if (WINDOW_SERVICE.equals(name)) { 3551 return mWindowManager; 3552 } else if (SEARCH_SERVICE.equals(name)) { 3553 ensureSearchManager(); 3554 return mSearchManager; 3555 } 3556 return super.getSystemService(name); 3557 } 3558 3559 /** 3560 * Change the title associated with this activity. If this is a 3561 * top-level activity, the title for its window will change. If it 3562 * is an embedded activity, the parent can do whatever it wants 3563 * with it. 3564 */ 3565 public void setTitle(CharSequence title) { 3566 mTitle = title; 3567 onTitleChanged(title, mTitleColor); 3568 3569 if (mParent != null) { 3570 mParent.onChildTitleChanged(this, title); 3571 } 3572 } 3573 3574 /** 3575 * Change the title associated with this activity. If this is a 3576 * top-level activity, the title for its window will change. If it 3577 * is an embedded activity, the parent can do whatever it wants 3578 * with it. 3579 */ 3580 public void setTitle(int titleId) { 3581 setTitle(getText(titleId)); 3582 } 3583 3584 public void setTitleColor(int textColor) { 3585 mTitleColor = textColor; 3586 onTitleChanged(mTitle, textColor); 3587 } 3588 3589 public final CharSequence getTitle() { 3590 return mTitle; 3591 } 3592 3593 public final int getTitleColor() { 3594 return mTitleColor; 3595 } 3596 3597 protected void onTitleChanged(CharSequence title, int color) { 3598 if (mTitleReady) { 3599 final Window win = getWindow(); 3600 if (win != null) { 3601 win.setTitle(title); 3602 if (color != 0) { 3603 win.setTitleColor(color); 3604 } 3605 } 3606 } 3607 } 3608 3609 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 3610 } 3611 3612 /** 3613 * Sets the visibility of the progress bar in the title. 3614 * <p> 3615 * In order for the progress bar to be shown, the feature must be requested 3616 * via {@link #requestWindowFeature(int)}. 3617 * 3618 * @param visible Whether to show the progress bars in the title. 3619 */ 3620 public final void setProgressBarVisibility(boolean visible) { 3621 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 3622 Window.PROGRESS_VISIBILITY_OFF); 3623 } 3624 3625 /** 3626 * Sets the visibility of the indeterminate progress bar in the title. 3627 * <p> 3628 * In order for the progress bar to be shown, the feature must be requested 3629 * via {@link #requestWindowFeature(int)}. 3630 * 3631 * @param visible Whether to show the progress bars in the title. 3632 */ 3633 public final void setProgressBarIndeterminateVisibility(boolean visible) { 3634 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 3635 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 3636 } 3637 3638 /** 3639 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 3640 * is always indeterminate). 3641 * <p> 3642 * In order for the progress bar to be shown, the feature must be requested 3643 * via {@link #requestWindowFeature(int)}. 3644 * 3645 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 3646 */ 3647 public final void setProgressBarIndeterminate(boolean indeterminate) { 3648 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3649 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 3650 } 3651 3652 /** 3653 * Sets the progress for the progress bars in the title. 3654 * <p> 3655 * In order for the progress bar to be shown, the feature must be requested 3656 * via {@link #requestWindowFeature(int)}. 3657 * 3658 * @param progress The progress for the progress bar. Valid ranges are from 3659 * 0 to 10000 (both inclusive). If 10000 is given, the progress 3660 * bar will be completely filled and will fade out. 3661 */ 3662 public final void setProgress(int progress) { 3663 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 3664 } 3665 3666 /** 3667 * Sets the secondary progress for the progress bar in the title. This 3668 * progress is drawn between the primary progress (set via 3669 * {@link #setProgress(int)} and the background. It can be ideal for media 3670 * scenarios such as showing the buffering progress while the default 3671 * progress shows the play progress. 3672 * <p> 3673 * In order for the progress bar to be shown, the feature must be requested 3674 * via {@link #requestWindowFeature(int)}. 3675 * 3676 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 3677 * 0 to 10000 (both inclusive). 3678 */ 3679 public final void setSecondaryProgress(int secondaryProgress) { 3680 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3681 secondaryProgress + Window.PROGRESS_SECONDARY_START); 3682 } 3683 3684 /** 3685 * Suggests an audio stream whose volume should be changed by the hardware 3686 * volume controls. 3687 * <p> 3688 * The suggested audio stream will be tied to the window of this Activity. 3689 * If the Activity is switched, the stream set here is no longer the 3690 * suggested stream. The client does not need to save and restore the old 3691 * suggested stream value in onPause and onResume. 3692 * 3693 * @param streamType The type of the audio stream whose volume should be 3694 * changed by the hardware volume controls. It is not guaranteed that 3695 * the hardware volume controls will always change this stream's 3696 * volume (for example, if a call is in progress, its stream's volume 3697 * may be changed instead). To reset back to the default, use 3698 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 3699 */ 3700 public final void setVolumeControlStream(int streamType) { 3701 getWindow().setVolumeControlStream(streamType); 3702 } 3703 3704 /** 3705 * Gets the suggested audio stream whose volume should be changed by the 3706 * harwdare volume controls. 3707 * 3708 * @return The suggested audio stream type whose volume should be changed by 3709 * the hardware volume controls. 3710 * @see #setVolumeControlStream(int) 3711 */ 3712 public final int getVolumeControlStream() { 3713 return getWindow().getVolumeControlStream(); 3714 } 3715 3716 /** 3717 * Runs the specified action on the UI thread. If the current thread is the UI 3718 * thread, then the action is executed immediately. If the current thread is 3719 * not the UI thread, the action is posted to the event queue of the UI thread. 3720 * 3721 * @param action the action to run on the UI thread 3722 */ 3723 public final void runOnUiThread(Runnable action) { 3724 if (Thread.currentThread() != mUiThread) { 3725 mHandler.post(action); 3726 } else { 3727 action.run(); 3728 } 3729 } 3730 3731 /** 3732 * Stub implementation of {@link android.view.LayoutInflater.Factory#onCreateView} used when 3733 * inflating with the LayoutInflater returned by {@link #getSystemService}. This 3734 * implementation simply returns null for all view names. 3735 * 3736 * @see android.view.LayoutInflater#createView 3737 * @see android.view.Window#getLayoutInflater 3738 */ 3739 public View onCreateView(String name, Context context, AttributeSet attrs) { 3740 return null; 3741 } 3742 3743 // ------------------ Internal API ------------------ 3744 3745 final void setParent(Activity parent) { 3746 mParent = parent; 3747 } 3748 3749 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 3750 Application application, Intent intent, ActivityInfo info, CharSequence title, 3751 Activity parent, String id, Object lastNonConfigurationInstance, 3752 Configuration config) { 3753 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 3754 lastNonConfigurationInstance, null, config); 3755 } 3756 3757 final void attach(Context context, ActivityThread aThread, 3758 Instrumentation instr, IBinder token, int ident, 3759 Application application, Intent intent, ActivityInfo info, 3760 CharSequence title, Activity parent, String id, 3761 Object lastNonConfigurationInstance, 3762 HashMap<String,Object> lastNonConfigurationChildInstances, 3763 Configuration config) { 3764 attachBaseContext(context); 3765 3766 mWindow = PolicyManager.makeNewWindow(this); 3767 mWindow.setCallback(this); 3768 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 3769 mWindow.setSoftInputMode(info.softInputMode); 3770 } 3771 mUiThread = Thread.currentThread(); 3772 3773 mMainThread = aThread; 3774 mInstrumentation = instr; 3775 mToken = token; 3776 mIdent = ident; 3777 mApplication = application; 3778 mIntent = intent; 3779 mComponent = intent.getComponent(); 3780 mActivityInfo = info; 3781 mTitle = title; 3782 mParent = parent; 3783 mEmbeddedID = id; 3784 mLastNonConfigurationInstance = lastNonConfigurationInstance; 3785 mLastNonConfigurationChildInstances = lastNonConfigurationChildInstances; 3786 3787 mWindow.setWindowManager(null, mToken, mComponent.flattenToString()); 3788 if (mParent != null) { 3789 mWindow.setContainer(mParent.getWindow()); 3790 } 3791 mWindowManager = mWindow.getWindowManager(); 3792 mCurrentConfig = config; 3793 } 3794 3795 final IBinder getActivityToken() { 3796 return mParent != null ? mParent.getActivityToken() : mToken; 3797 } 3798 3799 final void performStart() { 3800 mCalled = false; 3801 mInstrumentation.callActivityOnStart(this); 3802 if (!mCalled) { 3803 throw new SuperNotCalledException( 3804 "Activity " + mComponent.toShortString() + 3805 " did not call through to super.onStart()"); 3806 } 3807 } 3808 3809 final void performRestart() { 3810 synchronized (mManagedCursors) { 3811 final int N = mManagedCursors.size(); 3812 for (int i=0; i<N; i++) { 3813 ManagedCursor mc = mManagedCursors.get(i); 3814 if (mc.mReleased || mc.mUpdated) { 3815 mc.mCursor.requery(); 3816 mc.mReleased = false; 3817 mc.mUpdated = false; 3818 } 3819 } 3820 } 3821 3822 if (mStopped) { 3823 mStopped = false; 3824 mCalled = false; 3825 mInstrumentation.callActivityOnRestart(this); 3826 if (!mCalled) { 3827 throw new SuperNotCalledException( 3828 "Activity " + mComponent.toShortString() + 3829 " did not call through to super.onRestart()"); 3830 } 3831 performStart(); 3832 } 3833 } 3834 3835 final void performResume() { 3836 performRestart(); 3837 3838 mLastNonConfigurationInstance = null; 3839 3840 // First call onResume() -before- setting mResumed, so we don't 3841 // send out any status bar / menu notifications the client makes. 3842 mCalled = false; 3843 mInstrumentation.callActivityOnResume(this); 3844 if (!mCalled) { 3845 throw new SuperNotCalledException( 3846 "Activity " + mComponent.toShortString() + 3847 " did not call through to super.onResume()"); 3848 } 3849 3850 // Now really resume, and install the current status bar and menu. 3851 mResumed = true; 3852 mCalled = false; 3853 onPostResume(); 3854 if (!mCalled) { 3855 throw new SuperNotCalledException( 3856 "Activity " + mComponent.toShortString() + 3857 " did not call through to super.onPostResume()"); 3858 } 3859 } 3860 3861 final void performPause() { 3862 mCalled = false; 3863 onPause(); 3864 if (!mCalled && getApplicationInfo().targetSdkVersion 3865 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 3866 throw new SuperNotCalledException( 3867 "Activity " + mComponent.toShortString() + 3868 " did not call through to super.onPause()"); 3869 } 3870 } 3871 3872 final void performUserLeaving() { 3873 onUserInteraction(); 3874 onUserLeaveHint(); 3875 } 3876 3877 final void performStop() { 3878 if (!mStopped) { 3879 if (mWindow != null) { 3880 mWindow.closeAllPanels(); 3881 } 3882 3883 mCalled = false; 3884 mInstrumentation.callActivityOnStop(this); 3885 if (!mCalled) { 3886 throw new SuperNotCalledException( 3887 "Activity " + mComponent.toShortString() + 3888 " did not call through to super.onStop()"); 3889 } 3890 3891 synchronized (mManagedCursors) { 3892 final int N = mManagedCursors.size(); 3893 for (int i=0; i<N; i++) { 3894 ManagedCursor mc = mManagedCursors.get(i); 3895 if (!mc.mReleased) { 3896 mc.mCursor.deactivate(); 3897 mc.mReleased = true; 3898 } 3899 } 3900 } 3901 3902 mStopped = true; 3903 } 3904 mResumed = false; 3905 } 3906 3907 final boolean isResumed() { 3908 return mResumed; 3909 } 3910 3911 void dispatchActivityResult(String who, int requestCode, 3912 int resultCode, Intent data) { 3913 if (Config.LOGV) Log.v( 3914 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 3915 + ", resCode=" + resultCode + ", data=" + data); 3916 if (who == null) { 3917 onActivityResult(requestCode, resultCode, data); 3918 } 3919 } 3920} 3921