Activity.java revision 0b2a6d0773211449fbde9d2706388714beeffebb
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 } 1166 1167 /** 1168 * Called as part of the activity lifecycle when an activity is about to go 1169 * into the background as the result of user choice. For example, when the 1170 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1171 * when an incoming phone call causes the in-call Activity to be automatically 1172 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1173 * the activity being interrupted. In cases when it is invoked, this method 1174 * is called right before the activity's {@link #onPause} callback. 1175 * 1176 * <p>This callback and {@link #onUserInteraction} are intended to help 1177 * activities manage status bar notifications intelligently; specifically, 1178 * for helping activities determine the proper time to cancel a notfication. 1179 * 1180 * @see #onUserInteraction() 1181 */ 1182 protected void onUserLeaveHint() { 1183 } 1184 1185 /** 1186 * Generate a new thumbnail for this activity. This method is called before 1187 * pausing the activity, and should draw into <var>outBitmap</var> the 1188 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1189 * can use the given <var>canvas</var>, which is configured to draw into the 1190 * bitmap, for rendering if desired. 1191 * 1192 * <p>The default implementation renders the Screen's current view 1193 * hierarchy into the canvas to generate a thumbnail. 1194 * 1195 * <p>If you return false, the bitmap will be filled with a default 1196 * thumbnail. 1197 * 1198 * @param outBitmap The bitmap to contain the thumbnail. 1199 * @param canvas Can be used to render into the bitmap. 1200 * 1201 * @return Return true if you have drawn into the bitmap; otherwise after 1202 * you return it will be filled with a default thumbnail. 1203 * 1204 * @see #onCreateDescription 1205 * @see #onSaveInstanceState 1206 * @see #onPause 1207 */ 1208 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1209 if (mDecor == null) { 1210 return false; 1211 } 1212 1213 int paddingLeft = 0; 1214 int paddingRight = 0; 1215 int paddingTop = 0; 1216 int paddingBottom = 0; 1217 1218 // Find System window and use padding so we ignore space reserved for decorations 1219 // like the status bar and such. 1220 final FrameLayout top = (FrameLayout) mDecor; 1221 for (int i = 0; i < top.getChildCount(); i++) { 1222 View child = top.getChildAt(i); 1223 if (child.isFitsSystemWindowsFlagSet()) { 1224 paddingLeft = child.getPaddingLeft(); 1225 paddingRight = child.getPaddingRight(); 1226 paddingTop = child.getPaddingTop(); 1227 paddingBottom = child.getPaddingBottom(); 1228 break; 1229 } 1230 } 1231 1232 final int visibleWidth = mDecor.getWidth() - paddingLeft - paddingRight; 1233 final int visibleHeight = mDecor.getHeight() - paddingTop - paddingBottom; 1234 1235 canvas.save(); 1236 canvas.scale( (float) outBitmap.getWidth() / visibleWidth, 1237 (float) outBitmap.getHeight() / visibleHeight); 1238 canvas.translate(-paddingLeft, -paddingTop); 1239 mDecor.draw(canvas); 1240 canvas.restore(); 1241 1242 return true; 1243 } 1244 1245 /** 1246 * Generate a new description for this activity. This method is called 1247 * before pausing the activity and can, if desired, return some textual 1248 * description of its current state to be displayed to the user. 1249 * 1250 * <p>The default implementation returns null, which will cause you to 1251 * inherit the description from the previous activity. If all activities 1252 * return null, generally the label of the top activity will be used as the 1253 * description. 1254 * 1255 * @return A description of what the user is doing. It should be short and 1256 * sweet (only a few words). 1257 * 1258 * @see #onCreateThumbnail 1259 * @see #onSaveInstanceState 1260 * @see #onPause 1261 */ 1262 public CharSequence onCreateDescription() { 1263 return null; 1264 } 1265 1266 /** 1267 * Called when you are no longer visible to the user. You will next 1268 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1269 * depending on later user activity. 1270 * 1271 * <p>Note that this method may never be called, in low memory situations 1272 * where the system does not have enough memory to keep your activity's 1273 * process running after its {@link #onPause} method is called. 1274 * 1275 * <p><em>Derived classes must call through to the super class's 1276 * implementation of this method. If they do not, an exception will be 1277 * thrown.</em></p> 1278 * 1279 * @see #onRestart 1280 * @see #onResume 1281 * @see #onSaveInstanceState 1282 * @see #onDestroy 1283 */ 1284 protected void onStop() { 1285 mCalled = true; 1286 } 1287 1288 /** 1289 * Perform any final cleanup before an activity is destroyed. This can 1290 * happen either because the activity is finishing (someone called 1291 * {@link #finish} on it, or because the system is temporarily destroying 1292 * this instance of the activity to save space. You can distinguish 1293 * between these two scenarios with the {@link #isFinishing} method. 1294 * 1295 * <p><em>Note: do not count on this method being called as a place for 1296 * saving data! For example, if an activity is editing data in a content 1297 * provider, those edits should be committed in either {@link #onPause} or 1298 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1299 * free resources like threads that are associated with an activity, so 1300 * that a destroyed activity does not leave such things around while the 1301 * rest of its application is still running. There are situations where 1302 * the system will simply kill the activity's hosting process without 1303 * calling this method (or any others) in it, so it should not be used to 1304 * do things that are intended to remain around after the process goes 1305 * away. 1306 * 1307 * <p><em>Derived classes must call through to the super class's 1308 * implementation of this method. If they do not, an exception will be 1309 * thrown.</em></p> 1310 * 1311 * @see #onPause 1312 * @see #onStop 1313 * @see #finish 1314 * @see #isFinishing 1315 */ 1316 protected void onDestroy() { 1317 mCalled = true; 1318 1319 // dismiss any dialogs we are managing. 1320 if (mManagedDialogs != null) { 1321 final int numDialogs = mManagedDialogs.size(); 1322 for (int i = 0; i < numDialogs; i++) { 1323 final ManagedDialog md = mManagedDialogs.valueAt(i); 1324 if (md.mDialog.isShowing()) { 1325 md.mDialog.dismiss(); 1326 } 1327 } 1328 mManagedDialogs = null; 1329 } 1330 1331 // close any cursors we are managing. 1332 synchronized (mManagedCursors) { 1333 int numCursors = mManagedCursors.size(); 1334 for (int i = 0; i < numCursors; i++) { 1335 ManagedCursor c = mManagedCursors.get(i); 1336 if (c != null) { 1337 c.mCursor.close(); 1338 } 1339 } 1340 mManagedCursors.clear(); 1341 } 1342 1343 // Close any open search dialog 1344 if (mSearchManager != null) { 1345 mSearchManager.stopSearch(); 1346 } 1347 } 1348 1349 /** 1350 * Called by the system when the device configuration changes while your 1351 * activity is running. Note that this will <em>only</em> be called if 1352 * you have selected configurations you would like to handle with the 1353 * {@link android.R.attr#configChanges} attribute in your manifest. If 1354 * any configuration change occurs that is not selected to be reported 1355 * by that attribute, then instead of reporting it the system will stop 1356 * and restart the activity (to have it launched with the new 1357 * configuration). 1358 * 1359 * <p>At the time that this function has been called, your Resources 1360 * object will have been updated to return resource values matching the 1361 * new configuration. 1362 * 1363 * @param newConfig The new device configuration. 1364 */ 1365 public void onConfigurationChanged(Configuration newConfig) { 1366 mCalled = true; 1367 1368 if (mWindow != null) { 1369 // Pass the configuration changed event to the window 1370 mWindow.onConfigurationChanged(newConfig); 1371 } 1372 } 1373 1374 /** 1375 * If this activity is being destroyed because it can not handle a 1376 * configuration parameter being changed (and thus its 1377 * {@link #onConfigurationChanged(Configuration)} method is 1378 * <em>not</em> being called), then you can use this method to discover 1379 * the set of changes that have occurred while in the process of being 1380 * destroyed. Note that there is no guarantee that these will be 1381 * accurate (other changes could have happened at any time), so you should 1382 * only use this as an optimization hint. 1383 * 1384 * @return Returns a bit field of the configuration parameters that are 1385 * changing, as defined by the {@link android.content.res.Configuration} 1386 * class. 1387 */ 1388 public int getChangingConfigurations() { 1389 return mConfigChangeFlags; 1390 } 1391 1392 /** 1393 * Retrieve the non-configuration instance data that was previously 1394 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1395 * be available from the initial {@link #onCreate} and 1396 * {@link #onStart} calls to the new instance, allowing you to extract 1397 * any useful dynamic state from the previous instance. 1398 * 1399 * <p>Note that the data you retrieve here should <em>only</em> be used 1400 * as an optimization for handling configuration changes. You should always 1401 * be able to handle getting a null pointer back, and an activity must 1402 * still be able to restore itself to its previous state (through the 1403 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1404 * function returns null. 1405 * 1406 * @return Returns the object previously returned by 1407 * {@link #onRetainNonConfigurationInstance()}. 1408 */ 1409 public Object getLastNonConfigurationInstance() { 1410 return mLastNonConfigurationInstance; 1411 } 1412 1413 /** 1414 * Called by the system, as part of destroying an 1415 * activity due to a configuration change, when it is known that a new 1416 * instance will immediately be created for the new configuration. You 1417 * can return any object you like here, including the activity instance 1418 * itself, which can later be retrieved by calling 1419 * {@link #getLastNonConfigurationInstance()} in the new activity 1420 * instance. 1421 * 1422 * <p>This function is called purely as an optimization, and you must 1423 * not rely on it being called. When it is called, a number of guarantees 1424 * will be made to help optimize configuration switching: 1425 * <ul> 1426 * <li> The function will be called between {@link #onStop} and 1427 * {@link #onDestroy}. 1428 * <li> A new instance of the activity will <em>always</em> be immediately 1429 * created after this one's {@link #onDestroy()} is called. 1430 * <li> The object you return here will <em>always</em> be available from 1431 * the {@link #getLastNonConfigurationInstance()} method of the following 1432 * activity instance as described there. 1433 * </ul> 1434 * 1435 * <p>These guarantees are designed so that an activity can use this API 1436 * to propagate extensive state from the old to new activity instance, from 1437 * loaded bitmaps, to network connections, to evenly actively running 1438 * threads. Note that you should <em>not</em> propagate any data that 1439 * may change based on the configuration, including any data loaded from 1440 * resources such as strings, layouts, or drawables. 1441 * 1442 * @return Return any Object holding the desired state to propagate to the 1443 * next activity instance. 1444 */ 1445 public Object onRetainNonConfigurationInstance() { 1446 return null; 1447 } 1448 1449 /** 1450 * Retrieve the non-configuration instance data that was previously 1451 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1452 * be available from the initial {@link #onCreate} and 1453 * {@link #onStart} calls to the new instance, allowing you to extract 1454 * any useful dynamic state from the previous instance. 1455 * 1456 * <p>Note that the data you retrieve here should <em>only</em> be used 1457 * as an optimization for handling configuration changes. You should always 1458 * be able to handle getting a null pointer back, and an activity must 1459 * still be able to restore itself to its previous state (through the 1460 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1461 * function returns null. 1462 * 1463 * @return Returns the object previously returned by 1464 * {@link #onRetainNonConfigurationChildInstances()} 1465 */ 1466 HashMap<String,Object> getLastNonConfigurationChildInstances() { 1467 return mLastNonConfigurationChildInstances; 1468 } 1469 1470 /** 1471 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1472 * it should return either a mapping from child activity id strings to arbitrary objects, 1473 * or null. This method is intended to be used by Activity framework subclasses that control a 1474 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1475 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1476 */ 1477 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1478 return null; 1479 } 1480 1481 public void onLowMemory() { 1482 mCalled = true; 1483 } 1484 1485 /** 1486 * Wrapper around 1487 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1488 * that gives the resulting {@link Cursor} to call 1489 * {@link #startManagingCursor} so that the activity will manage its 1490 * lifecycle for you. 1491 * 1492 * @param uri The URI of the content provider to query. 1493 * @param projection List of columns to return. 1494 * @param selection SQL WHERE clause. 1495 * @param sortOrder SQL ORDER BY clause. 1496 * 1497 * @return The Cursor that was returned by query(). 1498 * 1499 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1500 * @see #startManagingCursor 1501 * @hide 1502 */ 1503 public final Cursor managedQuery(Uri uri, 1504 String[] projection, 1505 String selection, 1506 String sortOrder) 1507 { 1508 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1509 if (c != null) { 1510 startManagingCursor(c); 1511 } 1512 return c; 1513 } 1514 1515 /** 1516 * Wrapper around 1517 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1518 * that gives the resulting {@link Cursor} to call 1519 * {@link #startManagingCursor} so that the activity will manage its 1520 * lifecycle for you. 1521 * 1522 * @param uri The URI of the content provider to query. 1523 * @param projection List of columns to return. 1524 * @param selection SQL WHERE clause. 1525 * @param selectionArgs The arguments to selection, if any ?s are pesent 1526 * @param sortOrder SQL ORDER BY clause. 1527 * 1528 * @return The Cursor that was returned by query(). 1529 * 1530 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1531 * @see #startManagingCursor 1532 */ 1533 public final Cursor managedQuery(Uri uri, 1534 String[] projection, 1535 String selection, 1536 String[] selectionArgs, 1537 String sortOrder) 1538 { 1539 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1540 if (c != null) { 1541 startManagingCursor(c); 1542 } 1543 return c; 1544 } 1545 1546 /** 1547 * Wrapper around {@link Cursor#commitUpdates()} that takes care of noting 1548 * that the Cursor needs to be requeried. You can call this method in 1549 * {@link #onPause} or {@link #onStop} to have the system call 1550 * {@link Cursor#requery} for you if the activity is later resumed. This 1551 * allows you to avoid determing when to do the requery yourself (which is 1552 * required for the Cursor to see any data changes that were committed with 1553 * it). 1554 * 1555 * @param c The Cursor whose changes are to be committed. 1556 * 1557 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1558 * @see #startManagingCursor 1559 * @see Cursor#commitUpdates() 1560 * @see Cursor#requery 1561 * @hide 1562 */ 1563 @Deprecated 1564 public void managedCommitUpdates(Cursor c) { 1565 synchronized (mManagedCursors) { 1566 final int N = mManagedCursors.size(); 1567 for (int i=0; i<N; i++) { 1568 ManagedCursor mc = mManagedCursors.get(i); 1569 if (mc.mCursor == c) { 1570 c.commitUpdates(); 1571 mc.mUpdated = true; 1572 return; 1573 } 1574 } 1575 throw new RuntimeException( 1576 "Cursor " + c + " is not currently managed"); 1577 } 1578 } 1579 1580 /** 1581 * This method allows the activity to take care of managing the given 1582 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1583 * That is, when the activity is stopped it will automatically call 1584 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1585 * it will call {@link Cursor#requery} for you. When the activity is 1586 * destroyed, all managed Cursors will be closed automatically. 1587 * 1588 * @param c The Cursor to be managed. 1589 * 1590 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1591 * @see #stopManagingCursor 1592 */ 1593 public void startManagingCursor(Cursor c) { 1594 synchronized (mManagedCursors) { 1595 mManagedCursors.add(new ManagedCursor(c)); 1596 } 1597 } 1598 1599 /** 1600 * Given a Cursor that was previously given to 1601 * {@link #startManagingCursor}, stop the activity's management of that 1602 * cursor. 1603 * 1604 * @param c The Cursor that was being managed. 1605 * 1606 * @see #startManagingCursor 1607 */ 1608 public void stopManagingCursor(Cursor c) { 1609 synchronized (mManagedCursors) { 1610 final int N = mManagedCursors.size(); 1611 for (int i=0; i<N; i++) { 1612 ManagedCursor mc = mManagedCursors.get(i); 1613 if (mc.mCursor == c) { 1614 mManagedCursors.remove(i); 1615 break; 1616 } 1617 } 1618 } 1619 } 1620 1621 /** 1622 * Control whether this activity is required to be persistent. By default 1623 * activities are not persistent; setting this to true will prevent the 1624 * system from stopping this activity or its process when running low on 1625 * resources. 1626 * 1627 * <p><em>You should avoid using this method</em>, it has severe negative 1628 * consequences on how well the system can manage its resources. A better 1629 * approach is to implement an application service that you control with 1630 * {@link Context#startService} and {@link Context#stopService}. 1631 * 1632 * @param isPersistent Control whether the current activity must be 1633 * persistent, true if so, false for the normal 1634 * behavior. 1635 */ 1636 public void setPersistent(boolean isPersistent) { 1637 if (mParent == null) { 1638 try { 1639 ActivityManagerNative.getDefault() 1640 .setPersistent(mToken, isPersistent); 1641 } catch (RemoteException e) { 1642 // Empty 1643 } 1644 } else { 1645 throw new RuntimeException("setPersistent() not yet supported for embedded activities"); 1646 } 1647 } 1648 1649 /** 1650 * Finds a view that was identified by the id attribute from the XML that 1651 * was processed in {@link #onCreate}. 1652 * 1653 * @return The view if found or null otherwise. 1654 */ 1655 public View findViewById(int id) { 1656 return getWindow().findViewById(id); 1657 } 1658 1659 /** 1660 * Set the activity content from a layout resource. The resource will be 1661 * inflated, adding all top-level views to the activity. 1662 * 1663 * @param layoutResID Resource ID to be inflated. 1664 */ 1665 public void setContentView(int layoutResID) { 1666 getWindow().setContentView(layoutResID); 1667 } 1668 1669 /** 1670 * Set the activity content to an explicit view. This view is placed 1671 * directly into the activity's view hierarchy. It can itself be a complex 1672 * view hierarhcy. 1673 * 1674 * @param view The desired content to display. 1675 */ 1676 public void setContentView(View view) { 1677 getWindow().setContentView(view); 1678 } 1679 1680 /** 1681 * Set the activity content to an explicit view. This view is placed 1682 * directly into the activity's view hierarchy. It can itself be a complex 1683 * view hierarhcy. 1684 * 1685 * @param view The desired content to display. 1686 * @param params Layout parameters for the view. 1687 */ 1688 public void setContentView(View view, ViewGroup.LayoutParams params) { 1689 getWindow().setContentView(view, params); 1690 } 1691 1692 /** 1693 * Add an additional content view to the activity. Added after any existing 1694 * ones in the activity -- existing views are NOT removed. 1695 * 1696 * @param view The desired content to display. 1697 * @param params Layout parameters for the view. 1698 */ 1699 public void addContentView(View view, ViewGroup.LayoutParams params) { 1700 getWindow().addContentView(view, params); 1701 } 1702 1703 /** 1704 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1705 * keys. 1706 * 1707 * @see #setDefaultKeyMode 1708 */ 1709 static public final int DEFAULT_KEYS_DISABLE = 0; 1710 /** 1711 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1712 * key handling. 1713 * 1714 * @see #setDefaultKeyMode 1715 */ 1716 static public final int DEFAULT_KEYS_DIALER = 1; 1717 /** 1718 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1719 * default key handling. 1720 * 1721 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1722 * 1723 * @see #setDefaultKeyMode 1724 */ 1725 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1726 /** 1727 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1728 * will start an application-defined search. (If the application or activity does not 1729 * actually define a search, the the keys will be ignored.) 1730 * 1731 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1732 * 1733 * @see #setDefaultKeyMode 1734 */ 1735 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1736 1737 /** 1738 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1739 * will start a global search (typically web search, but some platforms may define alternate 1740 * methods for global search) 1741 * 1742 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1743 * 1744 * @see #setDefaultKeyMode 1745 */ 1746 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1747 1748 /** 1749 * Select the default key handling for this activity. This controls what 1750 * will happen to key events that are not otherwise handled. The default 1751 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1752 * floor. Other modes allow you to launch the dialer 1753 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1754 * menu without requiring the menu key be held down 1755 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1756 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1757 * 1758 * <p>Note that the mode selected here does not impact the default 1759 * handling of system keys, such as the "back" and "menu" keys, and your 1760 * activity and its views always get a first chance to receive and handle 1761 * all application keys. 1762 * 1763 * @param mode The desired default key mode constant. 1764 * 1765 * @see #DEFAULT_KEYS_DISABLE 1766 * @see #DEFAULT_KEYS_DIALER 1767 * @see #DEFAULT_KEYS_SHORTCUT 1768 * @see #DEFAULT_KEYS_SEARCH_LOCAL 1769 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 1770 * @see #onKeyDown 1771 */ 1772 public final void setDefaultKeyMode(int mode) { 1773 mDefaultKeyMode = mode; 1774 1775 // Some modes use a SpannableStringBuilder to track & dispatch input events 1776 // This list must remain in sync with the switch in onKeyDown() 1777 switch (mode) { 1778 case DEFAULT_KEYS_DISABLE: 1779 case DEFAULT_KEYS_SHORTCUT: 1780 mDefaultKeySsb = null; // not used in these modes 1781 break; 1782 case DEFAULT_KEYS_DIALER: 1783 case DEFAULT_KEYS_SEARCH_LOCAL: 1784 case DEFAULT_KEYS_SEARCH_GLOBAL: 1785 mDefaultKeySsb = new SpannableStringBuilder(); 1786 Selection.setSelection(mDefaultKeySsb,0); 1787 break; 1788 default: 1789 throw new IllegalArgumentException(); 1790 } 1791 } 1792 1793 /** 1794 * Called when a key was pressed down and not handled by any of the views 1795 * inside of the activity. So, for example, key presses while the cursor 1796 * is inside a TextView will not trigger the event (unless it is a navigation 1797 * to another object) because TextView handles its own key presses. 1798 * 1799 * <p>If the focused view didn't want this event, this method is called. 1800 * 1801 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 1802 * by calling {@link #onBackPressed()}, though the behavior varies based 1803 * on the application compatibility mode: for 1804 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 1805 * it will set up the dispatch to call {@link #onKeyUp} where the action 1806 * will be performed; for earlier applications, it will perform the 1807 * action immediately in on-down, as those versions of the platform 1808 * behaved. 1809 * 1810 * <p>Other additional default key handling may be performed 1811 * if configured with {@link #setDefaultKeyMode}. 1812 * 1813 * @return Return <code>true</code> to prevent this event from being propagated 1814 * further, or <code>false</code> to indicate that you have not handled 1815 * this event and it should continue to be propagated. 1816 * @see #onKeyUp 1817 * @see android.view.KeyEvent 1818 */ 1819 public boolean onKeyDown(int keyCode, KeyEvent event) { 1820 if (keyCode == KeyEvent.KEYCODE_BACK) { 1821 if (getApplicationInfo().targetSdkVersion 1822 >= Build.VERSION_CODES.ECLAIR) { 1823 event.startTracking(); 1824 } else { 1825 onBackPressed(); 1826 } 1827 return true; 1828 } 1829 1830 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 1831 return false; 1832 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 1833 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 1834 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 1835 return true; 1836 } 1837 return false; 1838 } else { 1839 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 1840 boolean clearSpannable = false; 1841 boolean handled; 1842 if ((event.getRepeatCount() != 0) || event.isSystem()) { 1843 clearSpannable = true; 1844 handled = false; 1845 } else { 1846 handled = TextKeyListener.getInstance().onKeyDown( 1847 null, mDefaultKeySsb, keyCode, event); 1848 if (handled && mDefaultKeySsb.length() > 0) { 1849 // something useable has been typed - dispatch it now. 1850 1851 final String str = mDefaultKeySsb.toString(); 1852 clearSpannable = true; 1853 1854 switch (mDefaultKeyMode) { 1855 case DEFAULT_KEYS_DIALER: 1856 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 1857 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 1858 startActivity(intent); 1859 break; 1860 case DEFAULT_KEYS_SEARCH_LOCAL: 1861 startSearch(str, false, null, false); 1862 break; 1863 case DEFAULT_KEYS_SEARCH_GLOBAL: 1864 startSearch(str, false, null, true); 1865 break; 1866 } 1867 } 1868 } 1869 if (clearSpannable) { 1870 mDefaultKeySsb.clear(); 1871 mDefaultKeySsb.clearSpans(); 1872 Selection.setSelection(mDefaultKeySsb,0); 1873 } 1874 return handled; 1875 } 1876 } 1877 1878 /** 1879 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 1880 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 1881 * the event). 1882 */ 1883 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 1884 return false; 1885 } 1886 1887 /** 1888 * Called when a key was released and not handled by any of the views 1889 * inside of the activity. So, for example, key presses while the cursor 1890 * is inside a TextView will not trigger the event (unless it is a navigation 1891 * to another object) because TextView handles its own key presses. 1892 * 1893 * <p>The default implementation handles KEYCODE_BACK to stop the activity 1894 * and go back. 1895 * 1896 * @return Return <code>true</code> to prevent this event from being propagated 1897 * further, or <code>false</code> to indicate that you have not handled 1898 * this event and it should continue to be propagated. 1899 * @see #onKeyDown 1900 * @see KeyEvent 1901 */ 1902 public boolean onKeyUp(int keyCode, KeyEvent event) { 1903 if (getApplicationInfo().targetSdkVersion 1904 >= Build.VERSION_CODES.ECLAIR) { 1905 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 1906 && !event.isCanceled()) { 1907 onBackPressed(); 1908 return true; 1909 } 1910 } 1911 return false; 1912 } 1913 1914 /** 1915 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 1916 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 1917 * the event). 1918 */ 1919 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 1920 return false; 1921 } 1922 1923 /** 1924 * Called when the activity has detected the user's press of the back 1925 * key. The default implementation simply finishes the current activity, 1926 * but you can override this to do whatever you want. 1927 */ 1928 public void onBackPressed() { 1929 finish(); 1930 } 1931 1932 /** 1933 * Called when a touch screen event was not handled by any of the views 1934 * under it. This is most useful to process touch events that happen 1935 * outside of your window bounds, where there is no view to receive it. 1936 * 1937 * @param event The touch screen event being processed. 1938 * 1939 * @return Return true if you have consumed the event, false if you haven't. 1940 * The default implementation always returns false. 1941 */ 1942 public boolean onTouchEvent(MotionEvent event) { 1943 return false; 1944 } 1945 1946 /** 1947 * Called when the trackball was moved and not handled by any of the 1948 * views inside of the activity. So, for example, if the trackball moves 1949 * while focus is on a button, you will receive a call here because 1950 * buttons do not normally do anything with trackball events. The call 1951 * here happens <em>before</em> trackball movements are converted to 1952 * DPAD key events, which then get sent back to the view hierarchy, and 1953 * will be processed at the point for things like focus navigation. 1954 * 1955 * @param event The trackball event being processed. 1956 * 1957 * @return Return true if you have consumed the event, false if you haven't. 1958 * The default implementation always returns false. 1959 */ 1960 public boolean onTrackballEvent(MotionEvent event) { 1961 return false; 1962 } 1963 1964 /** 1965 * Called whenever a key, touch, or trackball event is dispatched to the 1966 * activity. Implement this method if you wish to know that the user has 1967 * interacted with the device in some way while your activity is running. 1968 * This callback and {@link #onUserLeaveHint} are intended to help 1969 * activities manage status bar notifications intelligently; specifically, 1970 * for helping activities determine the proper time to cancel a notfication. 1971 * 1972 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 1973 * be accompanied by calls to {@link #onUserInteraction}. This 1974 * ensures that your activity will be told of relevant user activity such 1975 * as pulling down the notification pane and touching an item there. 1976 * 1977 * <p>Note that this callback will be invoked for the touch down action 1978 * that begins a touch gesture, but may not be invoked for the touch-moved 1979 * and touch-up actions that follow. 1980 * 1981 * @see #onUserLeaveHint() 1982 */ 1983 public void onUserInteraction() { 1984 } 1985 1986 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 1987 // Update window manager if: we have a view, that view is 1988 // attached to its parent (which will be a RootView), and 1989 // this activity is not embedded. 1990 if (mParent == null) { 1991 View decor = mDecor; 1992 if (decor != null && decor.getParent() != null) { 1993 getWindowManager().updateViewLayout(decor, params); 1994 } 1995 } 1996 } 1997 1998 public void onContentChanged() { 1999 } 2000 2001 /** 2002 * Called when the current {@link Window} of the activity gains or loses 2003 * focus. This is the best indicator of whether this activity is visible 2004 * to the user. The default implementation clears the key tracking 2005 * state, so should always be called. 2006 * 2007 * <p>Note that this provides information about global focus state, which 2008 * is managed independently of activity lifecycles. As such, while focus 2009 * changes will generally have some relation to lifecycle changes (an 2010 * activity that is stopped will not generally get window focus), you 2011 * should not rely on any particular order between the callbacks here and 2012 * those in the other lifecycle methods such as {@link #onResume}. 2013 * 2014 * <p>As a general rule, however, a resumed activity will have window 2015 * focus... unless it has displayed other dialogs or popups that take 2016 * input focus, in which case the activity itself will not have focus 2017 * when the other windows have it. Likewise, the system may display 2018 * system-level windows (such as the status bar notification panel or 2019 * a system alert) which will temporarily take window input focus without 2020 * pausing the foreground activity. 2021 * 2022 * @param hasFocus Whether the window of this activity has focus. 2023 * 2024 * @see #hasWindowFocus() 2025 * @see #onResume 2026 * @see View#onWindowFocusChanged(boolean) 2027 */ 2028 public void onWindowFocusChanged(boolean hasFocus) { 2029 } 2030 2031 /** 2032 * Called when the main window associated with the activity has been 2033 * attached to the window manager. 2034 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2035 * for more information. 2036 * @see View#onAttachedToWindow 2037 */ 2038 public void onAttachedToWindow() { 2039 } 2040 2041 /** 2042 * Called when the main window associated with the activity has been 2043 * detached from the window manager. 2044 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2045 * for more information. 2046 * @see View#onDetachedFromWindow 2047 */ 2048 public void onDetachedFromWindow() { 2049 } 2050 2051 /** 2052 * Returns true if this activity's <em>main</em> window currently has window focus. 2053 * Note that this is not the same as the view itself having focus. 2054 * 2055 * @return True if this activity's main window currently has window focus. 2056 * 2057 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2058 */ 2059 public boolean hasWindowFocus() { 2060 Window w = getWindow(); 2061 if (w != null) { 2062 View d = w.getDecorView(); 2063 if (d != null) { 2064 return d.hasWindowFocus(); 2065 } 2066 } 2067 return false; 2068 } 2069 2070 /** 2071 * Called to process key events. You can override this to intercept all 2072 * key events before they are dispatched to the window. Be sure to call 2073 * this implementation for key events that should be handled normally. 2074 * 2075 * @param event The key event. 2076 * 2077 * @return boolean Return true if this event was consumed. 2078 */ 2079 public boolean dispatchKeyEvent(KeyEvent event) { 2080 onUserInteraction(); 2081 Window win = getWindow(); 2082 if (win.superDispatchKeyEvent(event)) { 2083 return true; 2084 } 2085 View decor = mDecor; 2086 if (decor == null) decor = win.getDecorView(); 2087 return event.dispatch(this, decor != null 2088 ? decor.getKeyDispatcherState() : null, this); 2089 } 2090 2091 /** 2092 * Called to process touch screen events. You can override this to 2093 * intercept all touch screen events before they are dispatched to the 2094 * window. Be sure to call this implementation for touch screen events 2095 * that should be handled normally. 2096 * 2097 * @param ev The touch screen event. 2098 * 2099 * @return boolean Return true if this event was consumed. 2100 */ 2101 public boolean dispatchTouchEvent(MotionEvent ev) { 2102 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2103 onUserInteraction(); 2104 } 2105 if (getWindow().superDispatchTouchEvent(ev)) { 2106 return true; 2107 } 2108 return onTouchEvent(ev); 2109 } 2110 2111 /** 2112 * Called to process trackball events. You can override this to 2113 * intercept all trackball events before they are dispatched to the 2114 * window. Be sure to call this implementation for trackball events 2115 * that should be handled normally. 2116 * 2117 * @param ev The trackball event. 2118 * 2119 * @return boolean Return true if this event was consumed. 2120 */ 2121 public boolean dispatchTrackballEvent(MotionEvent ev) { 2122 onUserInteraction(); 2123 if (getWindow().superDispatchTrackballEvent(ev)) { 2124 return true; 2125 } 2126 return onTrackballEvent(ev); 2127 } 2128 2129 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2130 event.setClassName(getClass().getName()); 2131 event.setPackageName(getPackageName()); 2132 2133 LayoutParams params = getWindow().getAttributes(); 2134 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2135 (params.height == LayoutParams.MATCH_PARENT); 2136 event.setFullScreen(isFullScreen); 2137 2138 CharSequence title = getTitle(); 2139 if (!TextUtils.isEmpty(title)) { 2140 event.getText().add(title); 2141 } 2142 2143 return true; 2144 } 2145 2146 /** 2147 * Default implementation of 2148 * {@link android.view.Window.Callback#onCreatePanelView} 2149 * for activities. This 2150 * simply returns null so that all panel sub-windows will have the default 2151 * menu behavior. 2152 */ 2153 public View onCreatePanelView(int featureId) { 2154 return null; 2155 } 2156 2157 /** 2158 * Default implementation of 2159 * {@link android.view.Window.Callback#onCreatePanelMenu} 2160 * for activities. This calls through to the new 2161 * {@link #onCreateOptionsMenu} method for the 2162 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2163 * so that subclasses of Activity don't need to deal with feature codes. 2164 */ 2165 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2166 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2167 return onCreateOptionsMenu(menu); 2168 } 2169 return false; 2170 } 2171 2172 /** 2173 * Default implementation of 2174 * {@link android.view.Window.Callback#onPreparePanel} 2175 * for activities. This 2176 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2177 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2178 * panel, so that subclasses of 2179 * Activity don't need to deal with feature codes. 2180 */ 2181 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2182 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2183 boolean goforit = onPrepareOptionsMenu(menu); 2184 return goforit && menu.hasVisibleItems(); 2185 } 2186 return true; 2187 } 2188 2189 /** 2190 * {@inheritDoc} 2191 * 2192 * @return The default implementation returns true. 2193 */ 2194 public boolean onMenuOpened(int featureId, Menu menu) { 2195 return true; 2196 } 2197 2198 /** 2199 * Default implementation of 2200 * {@link android.view.Window.Callback#onMenuItemSelected} 2201 * for activities. This calls through to the new 2202 * {@link #onOptionsItemSelected} method for the 2203 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2204 * panel, so that subclasses of 2205 * Activity don't need to deal with feature codes. 2206 */ 2207 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2208 switch (featureId) { 2209 case Window.FEATURE_OPTIONS_PANEL: 2210 // Put event logging here so it gets called even if subclass 2211 // doesn't call through to superclass's implmeentation of each 2212 // of these methods below 2213 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2214 return onOptionsItemSelected(item); 2215 2216 case Window.FEATURE_CONTEXT_MENU: 2217 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2218 return onContextItemSelected(item); 2219 2220 default: 2221 return false; 2222 } 2223 } 2224 2225 /** 2226 * Default implementation of 2227 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2228 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2229 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2230 * so that subclasses of Activity don't need to deal with feature codes. 2231 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2232 * {@link #onContextMenuClosed(Menu)} will be called. 2233 */ 2234 public void onPanelClosed(int featureId, Menu menu) { 2235 switch (featureId) { 2236 case Window.FEATURE_OPTIONS_PANEL: 2237 onOptionsMenuClosed(menu); 2238 break; 2239 2240 case Window.FEATURE_CONTEXT_MENU: 2241 onContextMenuClosed(menu); 2242 break; 2243 } 2244 } 2245 2246 /** 2247 * Initialize the contents of the Activity's standard options menu. You 2248 * should place your menu items in to <var>menu</var>. 2249 * 2250 * <p>This is only called once, the first time the options menu is 2251 * displayed. To update the menu every time it is displayed, see 2252 * {@link #onPrepareOptionsMenu}. 2253 * 2254 * <p>The default implementation populates the menu with standard system 2255 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2256 * they will be correctly ordered with application-defined menu items. 2257 * Deriving classes should always call through to the base implementation. 2258 * 2259 * <p>You can safely hold on to <var>menu</var> (and any items created 2260 * from it), making modifications to it as desired, until the next 2261 * time onCreateOptionsMenu() is called. 2262 * 2263 * <p>When you add items to the menu, you can implement the Activity's 2264 * {@link #onOptionsItemSelected} method to handle them there. 2265 * 2266 * @param menu The options menu in which you place your items. 2267 * 2268 * @return You must return true for the menu to be displayed; 2269 * if you return false it will not be shown. 2270 * 2271 * @see #onPrepareOptionsMenu 2272 * @see #onOptionsItemSelected 2273 */ 2274 public boolean onCreateOptionsMenu(Menu menu) { 2275 if (mParent != null) { 2276 return mParent.onCreateOptionsMenu(menu); 2277 } 2278 return true; 2279 } 2280 2281 /** 2282 * Prepare the Screen's standard options menu to be displayed. This is 2283 * called right before the menu is shown, every time it is shown. You can 2284 * use this method to efficiently enable/disable items or otherwise 2285 * dynamically modify the contents. 2286 * 2287 * <p>The default implementation updates the system menu items based on the 2288 * activity's state. Deriving classes should always call through to the 2289 * base class implementation. 2290 * 2291 * @param menu The options menu as last shown or first initialized by 2292 * onCreateOptionsMenu(). 2293 * 2294 * @return You must return true for the menu to be displayed; 2295 * if you return false it will not be shown. 2296 * 2297 * @see #onCreateOptionsMenu 2298 */ 2299 public boolean onPrepareOptionsMenu(Menu menu) { 2300 if (mParent != null) { 2301 return mParent.onPrepareOptionsMenu(menu); 2302 } 2303 return true; 2304 } 2305 2306 /** 2307 * This hook is called whenever an item in your options menu is selected. 2308 * The default implementation simply returns false to have the normal 2309 * processing happen (calling the item's Runnable or sending a message to 2310 * its Handler as appropriate). You can use this method for any items 2311 * for which you would like to do processing without those other 2312 * facilities. 2313 * 2314 * <p>Derived classes should call through to the base class for it to 2315 * perform the default menu handling. 2316 * 2317 * @param item The menu item that was selected. 2318 * 2319 * @return boolean Return false to allow normal menu processing to 2320 * proceed, true to consume it here. 2321 * 2322 * @see #onCreateOptionsMenu 2323 */ 2324 public boolean onOptionsItemSelected(MenuItem item) { 2325 if (mParent != null) { 2326 return mParent.onOptionsItemSelected(item); 2327 } 2328 return false; 2329 } 2330 2331 /** 2332 * This hook is called whenever the options menu is being closed (either by the user canceling 2333 * the menu with the back/menu button, or when an item is selected). 2334 * 2335 * @param menu The options menu as last shown or first initialized by 2336 * onCreateOptionsMenu(). 2337 */ 2338 public void onOptionsMenuClosed(Menu menu) { 2339 if (mParent != null) { 2340 mParent.onOptionsMenuClosed(menu); 2341 } 2342 } 2343 2344 /** 2345 * Programmatically opens the options menu. If the options menu is already 2346 * open, this method does nothing. 2347 */ 2348 public void openOptionsMenu() { 2349 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2350 } 2351 2352 /** 2353 * Progammatically closes the options menu. If the options menu is already 2354 * closed, this method does nothing. 2355 */ 2356 public void closeOptionsMenu() { 2357 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2358 } 2359 2360 /** 2361 * Called when a context menu for the {@code view} is about to be shown. 2362 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2363 * time the context menu is about to be shown and should be populated for 2364 * the view (or item inside the view for {@link AdapterView} subclasses, 2365 * this can be found in the {@code menuInfo})). 2366 * <p> 2367 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2368 * item has been selected. 2369 * <p> 2370 * It is not safe to hold onto the context menu after this method returns. 2371 * {@inheritDoc} 2372 */ 2373 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2374 } 2375 2376 /** 2377 * Registers a context menu to be shown for the given view (multiple views 2378 * can show the context menu). This method will set the 2379 * {@link OnCreateContextMenuListener} on the view to this activity, so 2380 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2381 * called when it is time to show the context menu. 2382 * 2383 * @see #unregisterForContextMenu(View) 2384 * @param view The view that should show a context menu. 2385 */ 2386 public void registerForContextMenu(View view) { 2387 view.setOnCreateContextMenuListener(this); 2388 } 2389 2390 /** 2391 * Prevents a context menu to be shown for the given view. This method will remove the 2392 * {@link OnCreateContextMenuListener} on the view. 2393 * 2394 * @see #registerForContextMenu(View) 2395 * @param view The view that should stop showing a context menu. 2396 */ 2397 public void unregisterForContextMenu(View view) { 2398 view.setOnCreateContextMenuListener(null); 2399 } 2400 2401 /** 2402 * Programmatically opens the context menu for a particular {@code view}. 2403 * The {@code view} should have been added via 2404 * {@link #registerForContextMenu(View)}. 2405 * 2406 * @param view The view to show the context menu for. 2407 */ 2408 public void openContextMenu(View view) { 2409 view.showContextMenu(); 2410 } 2411 2412 /** 2413 * Programmatically closes the most recently opened context menu, if showing. 2414 */ 2415 public void closeContextMenu() { 2416 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2417 } 2418 2419 /** 2420 * This hook is called whenever an item in a context menu is selected. The 2421 * default implementation simply returns false to have the normal processing 2422 * happen (calling the item's Runnable or sending a message to its Handler 2423 * as appropriate). You can use this method for any items for which you 2424 * would like to do processing without those other facilities. 2425 * <p> 2426 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2427 * View that added this menu item. 2428 * <p> 2429 * Derived classes should call through to the base class for it to perform 2430 * the default menu handling. 2431 * 2432 * @param item The context menu item that was selected. 2433 * @return boolean Return false to allow normal context menu processing to 2434 * proceed, true to consume it here. 2435 */ 2436 public boolean onContextItemSelected(MenuItem item) { 2437 if (mParent != null) { 2438 return mParent.onContextItemSelected(item); 2439 } 2440 return false; 2441 } 2442 2443 /** 2444 * This hook is called whenever the context menu is being closed (either by 2445 * the user canceling the menu with the back/menu button, or when an item is 2446 * selected). 2447 * 2448 * @param menu The context menu that is being closed. 2449 */ 2450 public void onContextMenuClosed(Menu menu) { 2451 if (mParent != null) { 2452 mParent.onContextMenuClosed(menu); 2453 } 2454 } 2455 2456 /** 2457 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2458 */ 2459 @Deprecated 2460 protected Dialog onCreateDialog(int id) { 2461 return null; 2462 } 2463 2464 /** 2465 * Callback for creating dialogs that are managed (saved and restored) for you 2466 * by the activity. The default implementation calls through to 2467 * {@link #onCreateDialog(int)} for compatibility. 2468 * 2469 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2470 * this method the first time, and hang onto it thereafter. Any dialog 2471 * that is created by this method will automatically be saved and restored 2472 * for you, including whether it is showing. 2473 * 2474 * <p>If you would like the activity to manage saving and restoring dialogs 2475 * for you, you should override this method and handle any ids that are 2476 * passed to {@link #showDialog}. 2477 * 2478 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2479 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2480 * 2481 * @param id The id of the dialog. 2482 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2483 * @return The dialog. If you return null, the dialog will not be created. 2484 * 2485 * @see #onPrepareDialog(int, Dialog, Bundle) 2486 * @see #showDialog(int, Bundle) 2487 * @see #dismissDialog(int) 2488 * @see #removeDialog(int) 2489 */ 2490 protected Dialog onCreateDialog(int id, Bundle args) { 2491 return onCreateDialog(id); 2492 } 2493 2494 /** 2495 * @deprecated Old no-arguments version of 2496 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2497 */ 2498 @Deprecated 2499 protected void onPrepareDialog(int id, Dialog dialog) { 2500 dialog.setOwnerActivity(this); 2501 } 2502 2503 /** 2504 * Provides an opportunity to prepare a managed dialog before it is being 2505 * shown. The default implementation calls through to 2506 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2507 * 2508 * <p> 2509 * Override this if you need to update a managed dialog based on the state 2510 * of the application each time it is shown. For example, a time picker 2511 * dialog might want to be updated with the current time. You should call 2512 * through to the superclass's implementation. The default implementation 2513 * will set this Activity as the owner activity on the Dialog. 2514 * 2515 * @param id The id of the managed dialog. 2516 * @param dialog The dialog. 2517 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2518 * @see #onCreateDialog(int, Bundle) 2519 * @see #showDialog(int) 2520 * @see #dismissDialog(int) 2521 * @see #removeDialog(int) 2522 */ 2523 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 2524 onPrepareDialog(id, dialog); 2525 } 2526 2527 /** 2528 * Simple version of {@link #showDialog(int, Bundle)} that does not 2529 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 2530 * with null arguments. 2531 */ 2532 public final void showDialog(int id) { 2533 showDialog(id, null); 2534 } 2535 2536 /** 2537 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 2538 * will be made with the same id the first time this is called for a given 2539 * id. From thereafter, the dialog will be automatically saved and restored. 2540 * 2541 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 2542 * be made to provide an opportunity to do any timely preparation. 2543 * 2544 * @param id The id of the managed dialog. 2545 * @param args Arguments to pass through to the dialog. These will be saved 2546 * and restored for you. Note that if the dialog is already created, 2547 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 2548 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 2549 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 2550 * @return Returns true if the Dialog was created; false is returned if 2551 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 2552 * 2553 * @see Dialog 2554 * @see #onCreateDialog(int, Bundle) 2555 * @see #onPrepareDialog(int, Dialog, Bundle) 2556 * @see #dismissDialog(int) 2557 * @see #removeDialog(int) 2558 */ 2559 public final boolean showDialog(int id, Bundle args) { 2560 if (mManagedDialogs == null) { 2561 mManagedDialogs = new SparseArray<ManagedDialog>(); 2562 } 2563 ManagedDialog md = mManagedDialogs.get(id); 2564 if (md == null) { 2565 md = new ManagedDialog(); 2566 md.mDialog = createDialog(id, null, args); 2567 if (md.mDialog == null) { 2568 return false; 2569 } 2570 mManagedDialogs.put(id, md); 2571 } 2572 2573 md.mArgs = args; 2574 onPrepareDialog(id, md.mDialog, args); 2575 md.mDialog.show(); 2576 return true; 2577 } 2578 2579 /** 2580 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 2581 * 2582 * @param id The id of the managed dialog. 2583 * 2584 * @throws IllegalArgumentException if the id was not previously shown via 2585 * {@link #showDialog(int)}. 2586 * 2587 * @see #onCreateDialog(int, Bundle) 2588 * @see #onPrepareDialog(int, Dialog, Bundle) 2589 * @see #showDialog(int) 2590 * @see #removeDialog(int) 2591 */ 2592 public final void dismissDialog(int id) { 2593 if (mManagedDialogs == null) { 2594 throw missingDialog(id); 2595 } 2596 2597 final ManagedDialog md = mManagedDialogs.get(id); 2598 if (md == null) { 2599 throw missingDialog(id); 2600 } 2601 md.mDialog.dismiss(); 2602 } 2603 2604 /** 2605 * Creates an exception to throw if a user passed in a dialog id that is 2606 * unexpected. 2607 */ 2608 private IllegalArgumentException missingDialog(int id) { 2609 return new IllegalArgumentException("no dialog with id " + id + " was ever " 2610 + "shown via Activity#showDialog"); 2611 } 2612 2613 /** 2614 * Removes any internal references to a dialog managed by this Activity. 2615 * If the dialog is showing, it will dismiss it as part of the clean up. 2616 * 2617 * <p>This can be useful if you know that you will never show a dialog again and 2618 * want to avoid the overhead of saving and restoring it in the future. 2619 * 2620 * @param id The id of the managed dialog. 2621 * 2622 * @see #onCreateDialog(int, Bundle) 2623 * @see #onPrepareDialog(int, Dialog, Bundle) 2624 * @see #showDialog(int) 2625 * @see #dismissDialog(int) 2626 */ 2627 public final void removeDialog(int id) { 2628 if (mManagedDialogs == null) { 2629 return; 2630 } 2631 2632 final ManagedDialog md = mManagedDialogs.get(id); 2633 if (md == null) { 2634 return; 2635 } 2636 2637 md.mDialog.dismiss(); 2638 mManagedDialogs.remove(id); 2639 } 2640 2641 /** 2642 * This hook is called when the user signals the desire to start a search. 2643 * 2644 * <p>You can use this function as a simple way to launch the search UI, in response to a 2645 * menu item, search button, or other widgets within your activity. Unless overidden, 2646 * calling this function is the same as calling 2647 * {@link #startSearch startSearch(null, false, null, false)}, which launches 2648 * search for the current activity as specified in its manifest, see {@link SearchManager}. 2649 * 2650 * <p>You can override this function to force global search, e.g. in response to a dedicated 2651 * search key, or to block search entirely (by simply returning false). 2652 * 2653 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 2654 * The default implementation always returns {@code true}. 2655 * 2656 * @see android.app.SearchManager 2657 */ 2658 public boolean onSearchRequested() { 2659 startSearch(null, false, null, false); 2660 return true; 2661 } 2662 2663 /** 2664 * This hook is called to launch the search UI. 2665 * 2666 * <p>It is typically called from onSearchRequested(), either directly from 2667 * Activity.onSearchRequested() or from an overridden version in any given 2668 * Activity. If your goal is simply to activate search, it is preferred to call 2669 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 2670 * is to inject specific data such as context data, it is preferred to <i>override</i> 2671 * onSearchRequested(), so that any callers to it will benefit from the override. 2672 * 2673 * @param initialQuery Any non-null non-empty string will be inserted as 2674 * pre-entered text in the search query box. 2675 * @param selectInitialQuery If true, the intial query will be preselected, which means that 2676 * any further typing will replace it. This is useful for cases where an entire pre-formed 2677 * query is being inserted. If false, the selection point will be placed at the end of the 2678 * inserted query. This is useful when the inserted query is text that the user entered, 2679 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 2680 * if initialQuery is a non-empty string.</i> 2681 * @param appSearchData An application can insert application-specific 2682 * context here, in order to improve quality or specificity of its own 2683 * searches. This data will be returned with SEARCH intent(s). Null if 2684 * no extra data is required. 2685 * @param globalSearch If false, this will only launch the search that has been specifically 2686 * defined by the application (which is usually defined as a local search). If no default 2687 * search is defined in the current application or activity, global search will be launched. 2688 * If true, this will always launch a platform-global (e.g. web-based) search instead. 2689 * 2690 * @see android.app.SearchManager 2691 * @see #onSearchRequested 2692 */ 2693 public void startSearch(String initialQuery, boolean selectInitialQuery, 2694 Bundle appSearchData, boolean globalSearch) { 2695 ensureSearchManager(); 2696 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 2697 appSearchData, globalSearch); 2698 } 2699 2700 /** 2701 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 2702 * the search dialog. Made available for testing purposes. 2703 * 2704 * @param query The query to trigger. If empty, the request will be ignored. 2705 * @param appSearchData An application can insert application-specific 2706 * context here, in order to improve quality or specificity of its own 2707 * searches. This data will be returned with SEARCH intent(s). Null if 2708 * no extra data is required. 2709 */ 2710 public void triggerSearch(String query, Bundle appSearchData) { 2711 ensureSearchManager(); 2712 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 2713 } 2714 2715 /** 2716 * Request that key events come to this activity. Use this if your 2717 * activity has no views with focus, but the activity still wants 2718 * a chance to process key events. 2719 * 2720 * @see android.view.Window#takeKeyEvents 2721 */ 2722 public void takeKeyEvents(boolean get) { 2723 getWindow().takeKeyEvents(get); 2724 } 2725 2726 /** 2727 * Enable extended window features. This is a convenience for calling 2728 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 2729 * 2730 * @param featureId The desired feature as defined in 2731 * {@link android.view.Window}. 2732 * @return Returns true if the requested feature is supported and now 2733 * enabled. 2734 * 2735 * @see android.view.Window#requestFeature 2736 */ 2737 public final boolean requestWindowFeature(int featureId) { 2738 return getWindow().requestFeature(featureId); 2739 } 2740 2741 /** 2742 * Convenience for calling 2743 * {@link android.view.Window#setFeatureDrawableResource}. 2744 */ 2745 public final void setFeatureDrawableResource(int featureId, int resId) { 2746 getWindow().setFeatureDrawableResource(featureId, resId); 2747 } 2748 2749 /** 2750 * Convenience for calling 2751 * {@link android.view.Window#setFeatureDrawableUri}. 2752 */ 2753 public final void setFeatureDrawableUri(int featureId, Uri uri) { 2754 getWindow().setFeatureDrawableUri(featureId, uri); 2755 } 2756 2757 /** 2758 * Convenience for calling 2759 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 2760 */ 2761 public final void setFeatureDrawable(int featureId, Drawable drawable) { 2762 getWindow().setFeatureDrawable(featureId, drawable); 2763 } 2764 2765 /** 2766 * Convenience for calling 2767 * {@link android.view.Window#setFeatureDrawableAlpha}. 2768 */ 2769 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 2770 getWindow().setFeatureDrawableAlpha(featureId, alpha); 2771 } 2772 2773 /** 2774 * Convenience for calling 2775 * {@link android.view.Window#getLayoutInflater}. 2776 */ 2777 public LayoutInflater getLayoutInflater() { 2778 return getWindow().getLayoutInflater(); 2779 } 2780 2781 /** 2782 * Returns a {@link MenuInflater} with this context. 2783 */ 2784 public MenuInflater getMenuInflater() { 2785 return new MenuInflater(this); 2786 } 2787 2788 @Override 2789 protected void onApplyThemeResource(Resources.Theme theme, int resid, 2790 boolean first) { 2791 if (mParent == null) { 2792 super.onApplyThemeResource(theme, resid, first); 2793 } else { 2794 try { 2795 theme.setTo(mParent.getTheme()); 2796 } catch (Exception e) { 2797 // Empty 2798 } 2799 theme.applyStyle(resid, false); 2800 } 2801 } 2802 2803 /** 2804 * Launch an activity for which you would like a result when it finished. 2805 * When this activity exits, your 2806 * onActivityResult() method will be called with the given requestCode. 2807 * Using a negative requestCode is the same as calling 2808 * {@link #startActivity} (the activity is not launched as a sub-activity). 2809 * 2810 * <p>Note that this method should only be used with Intent protocols 2811 * that are defined to return a result. In other protocols (such as 2812 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 2813 * not get the result when you expect. For example, if the activity you 2814 * are launching uses the singleTask launch mode, it will not run in your 2815 * task and thus you will immediately receive a cancel result. 2816 * 2817 * <p>As a special case, if you call startActivityForResult() with a requestCode 2818 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 2819 * activity, then your window will not be displayed until a result is 2820 * returned back from the started activity. This is to avoid visible 2821 * flickering when redirecting to another activity. 2822 * 2823 * <p>This method throws {@link android.content.ActivityNotFoundException} 2824 * if there was no Activity found to run the given Intent. 2825 * 2826 * @param intent The intent to start. 2827 * @param requestCode If >= 0, this code will be returned in 2828 * onActivityResult() when the activity exits. 2829 * 2830 * @throws android.content.ActivityNotFoundException 2831 * 2832 * @see #startActivity 2833 */ 2834 public void startActivityForResult(Intent intent, int requestCode) { 2835 if (mParent == null) { 2836 Instrumentation.ActivityResult ar = 2837 mInstrumentation.execStartActivity( 2838 this, mMainThread.getApplicationThread(), mToken, this, 2839 intent, requestCode); 2840 if (ar != null) { 2841 mMainThread.sendActivityResult( 2842 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 2843 ar.getResultData()); 2844 } 2845 if (requestCode >= 0) { 2846 // If this start is requesting a result, we can avoid making 2847 // the activity visible until the result is received. Setting 2848 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 2849 // activity hidden during this time, to avoid flickering. 2850 // This can only be done when a result is requested because 2851 // that guarantees we will get information back when the 2852 // activity is finished, no matter what happens to it. 2853 mStartedActivity = true; 2854 } 2855 } else { 2856 mParent.startActivityFromChild(this, intent, requestCode); 2857 } 2858 } 2859 2860 /** 2861 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 2862 * to use a IntentSender to describe the activity to be started. If 2863 * the IntentSender is for an activity, that activity will be started 2864 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 2865 * here; otherwise, its associated action will be executed (such as 2866 * sending a broadcast) as if you had called 2867 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 2868 * 2869 * @param intent The IntentSender to launch. 2870 * @param requestCode If >= 0, this code will be returned in 2871 * onActivityResult() when the activity exits. 2872 * @param fillInIntent If non-null, this will be provided as the 2873 * intent parameter to {@link IntentSender#sendIntent}. 2874 * @param flagsMask Intent flags in the original IntentSender that you 2875 * would like to change. 2876 * @param flagsValues Desired values for any bits set in 2877 * <var>flagsMask</var> 2878 * @param extraFlags Always set to 0. 2879 */ 2880 public void startIntentSenderForResult(IntentSender intent, int requestCode, 2881 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 2882 throws IntentSender.SendIntentException { 2883 if (mParent == null) { 2884 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 2885 flagsMask, flagsValues, this); 2886 } else { 2887 mParent.startIntentSenderFromChild(this, intent, requestCode, 2888 fillInIntent, flagsMask, flagsValues, extraFlags); 2889 } 2890 } 2891 2892 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 2893 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity) 2894 throws IntentSender.SendIntentException { 2895 try { 2896 String resolvedType = null; 2897 if (fillInIntent != null) { 2898 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 2899 } 2900 int result = ActivityManagerNative.getDefault() 2901 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 2902 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 2903 requestCode, flagsMask, flagsValues); 2904 if (result == IActivityManager.START_CANCELED) { 2905 throw new IntentSender.SendIntentException(); 2906 } 2907 Instrumentation.checkStartActivityResult(result, null); 2908 } catch (RemoteException e) { 2909 } 2910 if (requestCode >= 0) { 2911 // If this start is requesting a result, we can avoid making 2912 // the activity visible until the result is received. Setting 2913 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 2914 // activity hidden during this time, to avoid flickering. 2915 // This can only be done when a result is requested because 2916 // that guarantees we will get information back when the 2917 // activity is finished, no matter what happens to it. 2918 mStartedActivity = true; 2919 } 2920 } 2921 2922 /** 2923 * Launch a new activity. You will not receive any information about when 2924 * the activity exits. This implementation overrides the base version, 2925 * providing information about 2926 * the activity performing the launch. Because of this additional 2927 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 2928 * required; if not specified, the new activity will be added to the 2929 * task of the caller. 2930 * 2931 * <p>This method throws {@link android.content.ActivityNotFoundException} 2932 * if there was no Activity found to run the given Intent. 2933 * 2934 * @param intent The intent to start. 2935 * 2936 * @throws android.content.ActivityNotFoundException 2937 * 2938 * @see #startActivityForResult 2939 */ 2940 @Override 2941 public void startActivity(Intent intent) { 2942 startActivityForResult(intent, -1); 2943 } 2944 2945 /** 2946 * Like {@link #startActivity(Intent)}, but taking a IntentSender 2947 * to start; see 2948 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 2949 * for more information. 2950 * 2951 * @param intent The IntentSender to launch. 2952 * @param fillInIntent If non-null, this will be provided as the 2953 * intent parameter to {@link IntentSender#sendIntent}. 2954 * @param flagsMask Intent flags in the original IntentSender that you 2955 * would like to change. 2956 * @param flagsValues Desired values for any bits set in 2957 * <var>flagsMask</var> 2958 * @param extraFlags Always set to 0. 2959 */ 2960 public void startIntentSender(IntentSender intent, 2961 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 2962 throws IntentSender.SendIntentException { 2963 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 2964 flagsValues, extraFlags); 2965 } 2966 2967 /** 2968 * A special variation to launch an activity only if a new activity 2969 * instance is needed to handle the given Intent. In other words, this is 2970 * just like {@link #startActivityForResult(Intent, int)} except: if you are 2971 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 2972 * singleTask or singleTop 2973 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 2974 * and the activity 2975 * that handles <var>intent</var> is the same as your currently running 2976 * activity, then a new instance is not needed. In this case, instead of 2977 * the normal behavior of calling {@link #onNewIntent} this function will 2978 * return and you can handle the Intent yourself. 2979 * 2980 * <p>This function can only be called from a top-level activity; if it is 2981 * called from a child activity, a runtime exception will be thrown. 2982 * 2983 * @param intent The intent to start. 2984 * @param requestCode If >= 0, this code will be returned in 2985 * onActivityResult() when the activity exits, as described in 2986 * {@link #startActivityForResult}. 2987 * 2988 * @return If a new activity was launched then true is returned; otherwise 2989 * false is returned and you must handle the Intent yourself. 2990 * 2991 * @see #startActivity 2992 * @see #startActivityForResult 2993 */ 2994 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 2995 if (mParent == null) { 2996 int result = IActivityManager.START_RETURN_INTENT_TO_CALLER; 2997 try { 2998 result = ActivityManagerNative.getDefault() 2999 .startActivity(mMainThread.getApplicationThread(), 3000 intent, intent.resolveTypeIfNeeded( 3001 getContentResolver()), 3002 null, 0, 3003 mToken, mEmbeddedID, requestCode, true, false); 3004 } catch (RemoteException e) { 3005 // Empty 3006 } 3007 3008 Instrumentation.checkStartActivityResult(result, intent); 3009 3010 if (requestCode >= 0) { 3011 // If this start is requesting a result, we can avoid making 3012 // the activity visible until the result is received. Setting 3013 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3014 // activity hidden during this time, to avoid flickering. 3015 // This can only be done when a result is requested because 3016 // that guarantees we will get information back when the 3017 // activity is finished, no matter what happens to it. 3018 mStartedActivity = true; 3019 } 3020 return result != IActivityManager.START_RETURN_INTENT_TO_CALLER; 3021 } 3022 3023 throw new UnsupportedOperationException( 3024 "startActivityIfNeeded can only be called from a top-level activity"); 3025 } 3026 3027 /** 3028 * Special version of starting an activity, for use when you are replacing 3029 * other activity components. You can use this to hand the Intent off 3030 * to the next Activity that can handle it. You typically call this in 3031 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3032 * 3033 * @param intent The intent to dispatch to the next activity. For 3034 * correct behavior, this must be the same as the Intent that started 3035 * your own activity; the only changes you can make are to the extras 3036 * inside of it. 3037 * 3038 * @return Returns a boolean indicating whether there was another Activity 3039 * to start: true if there was a next activity to start, false if there 3040 * wasn't. In general, if true is returned you will then want to call 3041 * finish() on yourself. 3042 */ 3043 public boolean startNextMatchingActivity(Intent intent) { 3044 if (mParent == null) { 3045 try { 3046 return ActivityManagerNative.getDefault() 3047 .startNextMatchingActivity(mToken, intent); 3048 } catch (RemoteException e) { 3049 // Empty 3050 } 3051 return false; 3052 } 3053 3054 throw new UnsupportedOperationException( 3055 "startNextMatchingActivity can only be called from a top-level activity"); 3056 } 3057 3058 /** 3059 * This is called when a child activity of this one calls its 3060 * {@link #startActivity} or {@link #startActivityForResult} method. 3061 * 3062 * <p>This method throws {@link android.content.ActivityNotFoundException} 3063 * if there was no Activity found to run the given Intent. 3064 * 3065 * @param child The activity making the call. 3066 * @param intent The intent to start. 3067 * @param requestCode Reply request code. < 0 if reply is not requested. 3068 * 3069 * @throws android.content.ActivityNotFoundException 3070 * 3071 * @see #startActivity 3072 * @see #startActivityForResult 3073 */ 3074 public void startActivityFromChild(Activity child, Intent intent, 3075 int requestCode) { 3076 Instrumentation.ActivityResult ar = 3077 mInstrumentation.execStartActivity( 3078 this, mMainThread.getApplicationThread(), mToken, child, 3079 intent, requestCode); 3080 if (ar != null) { 3081 mMainThread.sendActivityResult( 3082 mToken, child.mEmbeddedID, requestCode, 3083 ar.getResultCode(), ar.getResultData()); 3084 } 3085 } 3086 3087 /** 3088 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3089 * taking a IntentSender; see 3090 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3091 * for more information. 3092 */ 3093 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3094 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3095 int extraFlags) 3096 throws IntentSender.SendIntentException { 3097 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3098 flagsMask, flagsValues, child); 3099 } 3100 3101 /** 3102 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3103 * or {@link #finish} to specify an explicit transition animation to 3104 * perform next. 3105 * @param enterAnim A resource ID of the animation resource to use for 3106 * the incoming activity. Use 0 for no animation. 3107 * @param exitAnim A resource ID of the animation resource to use for 3108 * the outgoing activity. Use 0 for no animation. 3109 */ 3110 public void overridePendingTransition(int enterAnim, int exitAnim) { 3111 try { 3112 ActivityManagerNative.getDefault().overridePendingTransition( 3113 mToken, getPackageName(), enterAnim, exitAnim); 3114 } catch (RemoteException e) { 3115 } 3116 } 3117 3118 /** 3119 * Call this to set the result that your activity will return to its 3120 * caller. 3121 * 3122 * @param resultCode The result code to propagate back to the originating 3123 * activity, often RESULT_CANCELED or RESULT_OK 3124 * 3125 * @see #RESULT_CANCELED 3126 * @see #RESULT_OK 3127 * @see #RESULT_FIRST_USER 3128 * @see #setResult(int, Intent) 3129 */ 3130 public final void setResult(int resultCode) { 3131 synchronized (this) { 3132 mResultCode = resultCode; 3133 mResultData = null; 3134 } 3135 } 3136 3137 /** 3138 * Call this to set the result that your activity will return to its 3139 * caller. 3140 * 3141 * @param resultCode The result code to propagate back to the originating 3142 * activity, often RESULT_CANCELED or RESULT_OK 3143 * @param data The data to propagate back to the originating activity. 3144 * 3145 * @see #RESULT_CANCELED 3146 * @see #RESULT_OK 3147 * @see #RESULT_FIRST_USER 3148 * @see #setResult(int) 3149 */ 3150 public final void setResult(int resultCode, Intent data) { 3151 synchronized (this) { 3152 mResultCode = resultCode; 3153 mResultData = data; 3154 } 3155 } 3156 3157 /** 3158 * Return the name of the package that invoked this activity. This is who 3159 * the data in {@link #setResult setResult()} will be sent to. You can 3160 * use this information to validate that the recipient is allowed to 3161 * receive the data. 3162 * 3163 * <p>Note: if the calling activity is not expecting a result (that is it 3164 * did not use the {@link #startActivityForResult} 3165 * form that includes a request code), then the calling package will be 3166 * null. 3167 * 3168 * @return The package of the activity that will receive your 3169 * reply, or null if none. 3170 */ 3171 public String getCallingPackage() { 3172 try { 3173 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 3174 } catch (RemoteException e) { 3175 return null; 3176 } 3177 } 3178 3179 /** 3180 * Return the name of the activity that invoked this activity. This is 3181 * who the data in {@link #setResult setResult()} will be sent to. You 3182 * can use this information to validate that the recipient is allowed to 3183 * receive the data. 3184 * 3185 * <p>Note: if the calling activity is not expecting a result (that is it 3186 * did not use the {@link #startActivityForResult} 3187 * form that includes a request code), then the calling package will be 3188 * null. 3189 * 3190 * @return String The full name of the activity that will receive your 3191 * reply, or null if none. 3192 */ 3193 public ComponentName getCallingActivity() { 3194 try { 3195 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 3196 } catch (RemoteException e) { 3197 return null; 3198 } 3199 } 3200 3201 /** 3202 * Control whether this activity's main window is visible. This is intended 3203 * only for the special case of an activity that is not going to show a 3204 * UI itself, but can't just finish prior to onResume() because it needs 3205 * to wait for a service binding or such. Setting this to false allows 3206 * you to prevent your UI from being shown during that time. 3207 * 3208 * <p>The default value for this is taken from the 3209 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 3210 */ 3211 public void setVisible(boolean visible) { 3212 if (mVisibleFromClient != visible) { 3213 mVisibleFromClient = visible; 3214 if (mVisibleFromServer) { 3215 if (visible) makeVisible(); 3216 else mDecor.setVisibility(View.INVISIBLE); 3217 } 3218 } 3219 } 3220 3221 void makeVisible() { 3222 if (!mWindowAdded) { 3223 ViewManager wm = getWindowManager(); 3224 wm.addView(mDecor, getWindow().getAttributes()); 3225 mWindowAdded = true; 3226 } 3227 mDecor.setVisibility(View.VISIBLE); 3228 } 3229 3230 /** 3231 * Check to see whether this activity is in the process of finishing, 3232 * either because you called {@link #finish} on it or someone else 3233 * has requested that it finished. This is often used in 3234 * {@link #onPause} to determine whether the activity is simply pausing or 3235 * completely finishing. 3236 * 3237 * @return If the activity is finishing, returns true; else returns false. 3238 * 3239 * @see #finish 3240 */ 3241 public boolean isFinishing() { 3242 return mFinished; 3243 } 3244 3245 /** 3246 * Call this when your activity is done and should be closed. The 3247 * ActivityResult is propagated back to whoever launched you via 3248 * onActivityResult(). 3249 */ 3250 public void finish() { 3251 if (mParent == null) { 3252 int resultCode; 3253 Intent resultData; 3254 synchronized (this) { 3255 resultCode = mResultCode; 3256 resultData = mResultData; 3257 } 3258 if (Config.LOGV) Log.v(TAG, "Finishing self: token=" + mToken); 3259 try { 3260 if (ActivityManagerNative.getDefault() 3261 .finishActivity(mToken, resultCode, resultData)) { 3262 mFinished = true; 3263 } 3264 } catch (RemoteException e) { 3265 // Empty 3266 } 3267 } else { 3268 mParent.finishFromChild(this); 3269 } 3270 } 3271 3272 /** 3273 * This is called when a child activity of this one calls its 3274 * {@link #finish} method. The default implementation simply calls 3275 * finish() on this activity (the parent), finishing the entire group. 3276 * 3277 * @param child The activity making the call. 3278 * 3279 * @see #finish 3280 */ 3281 public void finishFromChild(Activity child) { 3282 finish(); 3283 } 3284 3285 /** 3286 * Force finish another activity that you had previously started with 3287 * {@link #startActivityForResult}. 3288 * 3289 * @param requestCode The request code of the activity that you had 3290 * given to startActivityForResult(). If there are multiple 3291 * activities started with this request code, they 3292 * will all be finished. 3293 */ 3294 public void finishActivity(int requestCode) { 3295 if (mParent == null) { 3296 try { 3297 ActivityManagerNative.getDefault() 3298 .finishSubActivity(mToken, mEmbeddedID, requestCode); 3299 } catch (RemoteException e) { 3300 // Empty 3301 } 3302 } else { 3303 mParent.finishActivityFromChild(this, requestCode); 3304 } 3305 } 3306 3307 /** 3308 * This is called when a child activity of this one calls its 3309 * finishActivity(). 3310 * 3311 * @param child The activity making the call. 3312 * @param requestCode Request code that had been used to start the 3313 * activity. 3314 */ 3315 public void finishActivityFromChild(Activity child, int requestCode) { 3316 try { 3317 ActivityManagerNative.getDefault() 3318 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 3319 } catch (RemoteException e) { 3320 // Empty 3321 } 3322 } 3323 3324 /** 3325 * Called when an activity you launched exits, giving you the requestCode 3326 * you started it with, the resultCode it returned, and any additional 3327 * data from it. The <var>resultCode</var> will be 3328 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 3329 * didn't return any result, or crashed during its operation. 3330 * 3331 * <p>You will receive this call immediately before onResume() when your 3332 * activity is re-starting. 3333 * 3334 * @param requestCode The integer request code originally supplied to 3335 * startActivityForResult(), allowing you to identify who this 3336 * result came from. 3337 * @param resultCode The integer result code returned by the child activity 3338 * through its setResult(). 3339 * @param data An Intent, which can return result data to the caller 3340 * (various data can be attached to Intent "extras"). 3341 * 3342 * @see #startActivityForResult 3343 * @see #createPendingResult 3344 * @see #setResult(int) 3345 */ 3346 protected void onActivityResult(int requestCode, int resultCode, 3347 Intent data) { 3348 } 3349 3350 /** 3351 * Create a new PendingIntent object which you can hand to others 3352 * for them to use to send result data back to your 3353 * {@link #onActivityResult} callback. The created object will be either 3354 * one-shot (becoming invalid after a result is sent back) or multiple 3355 * (allowing any number of results to be sent through it). 3356 * 3357 * @param requestCode Private request code for the sender that will be 3358 * associated with the result data when it is returned. The sender can not 3359 * modify this value, allowing you to identify incoming results. 3360 * @param data Default data to supply in the result, which may be modified 3361 * by the sender. 3362 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 3363 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 3364 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 3365 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 3366 * or any of the flags as supported by 3367 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 3368 * of the intent that can be supplied when the actual send happens. 3369 * 3370 * @return Returns an existing or new PendingIntent matching the given 3371 * parameters. May return null only if 3372 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 3373 * supplied. 3374 * 3375 * @see PendingIntent 3376 */ 3377 public PendingIntent createPendingResult(int requestCode, Intent data, 3378 int flags) { 3379 String packageName = getPackageName(); 3380 try { 3381 IIntentSender target = 3382 ActivityManagerNative.getDefault().getIntentSender( 3383 IActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 3384 mParent == null ? mToken : mParent.mToken, 3385 mEmbeddedID, requestCode, data, null, flags); 3386 return target != null ? new PendingIntent(target) : null; 3387 } catch (RemoteException e) { 3388 // Empty 3389 } 3390 return null; 3391 } 3392 3393 /** 3394 * Change the desired orientation of this activity. If the activity 3395 * is currently in the foreground or otherwise impacting the screen 3396 * orientation, the screen will immediately be changed (possibly causing 3397 * the activity to be restarted). Otherwise, this will be used the next 3398 * time the activity is visible. 3399 * 3400 * @param requestedOrientation An orientation constant as used in 3401 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3402 */ 3403 public void setRequestedOrientation(int requestedOrientation) { 3404 if (mParent == null) { 3405 try { 3406 ActivityManagerNative.getDefault().setRequestedOrientation( 3407 mToken, requestedOrientation); 3408 } catch (RemoteException e) { 3409 // Empty 3410 } 3411 } else { 3412 mParent.setRequestedOrientation(requestedOrientation); 3413 } 3414 } 3415 3416 /** 3417 * Return the current requested orientation of the activity. This will 3418 * either be the orientation requested in its component's manifest, or 3419 * the last requested orientation given to 3420 * {@link #setRequestedOrientation(int)}. 3421 * 3422 * @return Returns an orientation constant as used in 3423 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3424 */ 3425 public int getRequestedOrientation() { 3426 if (mParent == null) { 3427 try { 3428 return ActivityManagerNative.getDefault() 3429 .getRequestedOrientation(mToken); 3430 } catch (RemoteException e) { 3431 // Empty 3432 } 3433 } else { 3434 return mParent.getRequestedOrientation(); 3435 } 3436 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 3437 } 3438 3439 /** 3440 * Return the identifier of the task this activity is in. This identifier 3441 * will remain the same for the lifetime of the activity. 3442 * 3443 * @return Task identifier, an opaque integer. 3444 */ 3445 public int getTaskId() { 3446 try { 3447 return ActivityManagerNative.getDefault() 3448 .getTaskForActivity(mToken, false); 3449 } catch (RemoteException e) { 3450 return -1; 3451 } 3452 } 3453 3454 /** 3455 * Return whether this activity is the root of a task. The root is the 3456 * first activity in a task. 3457 * 3458 * @return True if this is the root activity, else false. 3459 */ 3460 public boolean isTaskRoot() { 3461 try { 3462 return ActivityManagerNative.getDefault() 3463 .getTaskForActivity(mToken, true) >= 0; 3464 } catch (RemoteException e) { 3465 return false; 3466 } 3467 } 3468 3469 /** 3470 * Move the task containing this activity to the back of the activity 3471 * stack. The activity's order within the task is unchanged. 3472 * 3473 * @param nonRoot If false then this only works if the activity is the root 3474 * of a task; if true it will work for any activity in 3475 * a task. 3476 * 3477 * @return If the task was moved (or it was already at the 3478 * back) true is returned, else false. 3479 */ 3480 public boolean moveTaskToBack(boolean nonRoot) { 3481 try { 3482 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 3483 mToken, nonRoot); 3484 } catch (RemoteException e) { 3485 // Empty 3486 } 3487 return false; 3488 } 3489 3490 /** 3491 * Returns class name for this activity with the package prefix removed. 3492 * This is the default name used to read and write settings. 3493 * 3494 * @return The local class name. 3495 */ 3496 public String getLocalClassName() { 3497 final String pkg = getPackageName(); 3498 final String cls = mComponent.getClassName(); 3499 int packageLen = pkg.length(); 3500 if (!cls.startsWith(pkg) || cls.length() <= packageLen 3501 || cls.charAt(packageLen) != '.') { 3502 return cls; 3503 } 3504 return cls.substring(packageLen+1); 3505 } 3506 3507 /** 3508 * Returns complete component name of this activity. 3509 * 3510 * @return Returns the complete component name for this activity 3511 */ 3512 public ComponentName getComponentName() 3513 { 3514 return mComponent; 3515 } 3516 3517 /** 3518 * Retrieve a {@link SharedPreferences} object for accessing preferences 3519 * that are private to this activity. This simply calls the underlying 3520 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 3521 * class name as the preferences name. 3522 * 3523 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 3524 * operation, {@link #MODE_WORLD_READABLE} and 3525 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 3526 * 3527 * @return Returns the single SharedPreferences instance that can be used 3528 * to retrieve and modify the preference values. 3529 */ 3530 public SharedPreferences getPreferences(int mode) { 3531 return getSharedPreferences(getLocalClassName(), mode); 3532 } 3533 3534 private void ensureSearchManager() { 3535 if (mSearchManager != null) { 3536 return; 3537 } 3538 3539 mSearchManager = new SearchManager(this, null); 3540 } 3541 3542 @Override 3543 public Object getSystemService(String name) { 3544 if (getBaseContext() == null) { 3545 throw new IllegalStateException( 3546 "System services not available to Activities before onCreate()"); 3547 } 3548 3549 if (WINDOW_SERVICE.equals(name)) { 3550 return mWindowManager; 3551 } else if (SEARCH_SERVICE.equals(name)) { 3552 ensureSearchManager(); 3553 return mSearchManager; 3554 } 3555 return super.getSystemService(name); 3556 } 3557 3558 /** 3559 * Change the title associated with this activity. If this is a 3560 * top-level activity, the title for its window will change. If it 3561 * is an embedded activity, the parent can do whatever it wants 3562 * with it. 3563 */ 3564 public void setTitle(CharSequence title) { 3565 mTitle = title; 3566 onTitleChanged(title, mTitleColor); 3567 3568 if (mParent != null) { 3569 mParent.onChildTitleChanged(this, title); 3570 } 3571 } 3572 3573 /** 3574 * Change the title associated with this activity. If this is a 3575 * top-level activity, the title for its window will change. If it 3576 * is an embedded activity, the parent can do whatever it wants 3577 * with it. 3578 */ 3579 public void setTitle(int titleId) { 3580 setTitle(getText(titleId)); 3581 } 3582 3583 public void setTitleColor(int textColor) { 3584 mTitleColor = textColor; 3585 onTitleChanged(mTitle, textColor); 3586 } 3587 3588 public final CharSequence getTitle() { 3589 return mTitle; 3590 } 3591 3592 public final int getTitleColor() { 3593 return mTitleColor; 3594 } 3595 3596 protected void onTitleChanged(CharSequence title, int color) { 3597 if (mTitleReady) { 3598 final Window win = getWindow(); 3599 if (win != null) { 3600 win.setTitle(title); 3601 if (color != 0) { 3602 win.setTitleColor(color); 3603 } 3604 } 3605 } 3606 } 3607 3608 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 3609 } 3610 3611 /** 3612 * Sets the visibility of the progress bar in the title. 3613 * <p> 3614 * In order for the progress bar to be shown, the feature must be requested 3615 * via {@link #requestWindowFeature(int)}. 3616 * 3617 * @param visible Whether to show the progress bars in the title. 3618 */ 3619 public final void setProgressBarVisibility(boolean visible) { 3620 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 3621 Window.PROGRESS_VISIBILITY_OFF); 3622 } 3623 3624 /** 3625 * Sets the visibility of the indeterminate progress bar in the title. 3626 * <p> 3627 * In order for the progress bar to be shown, the feature must be requested 3628 * via {@link #requestWindowFeature(int)}. 3629 * 3630 * @param visible Whether to show the progress bars in the title. 3631 */ 3632 public final void setProgressBarIndeterminateVisibility(boolean visible) { 3633 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 3634 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 3635 } 3636 3637 /** 3638 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 3639 * is always indeterminate). 3640 * <p> 3641 * In order for the progress bar to be shown, the feature must be requested 3642 * via {@link #requestWindowFeature(int)}. 3643 * 3644 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 3645 */ 3646 public final void setProgressBarIndeterminate(boolean indeterminate) { 3647 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3648 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 3649 } 3650 3651 /** 3652 * Sets the progress for the progress bars in the title. 3653 * <p> 3654 * In order for the progress bar to be shown, the feature must be requested 3655 * via {@link #requestWindowFeature(int)}. 3656 * 3657 * @param progress The progress for the progress bar. Valid ranges are from 3658 * 0 to 10000 (both inclusive). If 10000 is given, the progress 3659 * bar will be completely filled and will fade out. 3660 */ 3661 public final void setProgress(int progress) { 3662 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 3663 } 3664 3665 /** 3666 * Sets the secondary progress for the progress bar in the title. This 3667 * progress is drawn between the primary progress (set via 3668 * {@link #setProgress(int)} and the background. It can be ideal for media 3669 * scenarios such as showing the buffering progress while the default 3670 * progress shows the play progress. 3671 * <p> 3672 * In order for the progress bar to be shown, the feature must be requested 3673 * via {@link #requestWindowFeature(int)}. 3674 * 3675 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 3676 * 0 to 10000 (both inclusive). 3677 */ 3678 public final void setSecondaryProgress(int secondaryProgress) { 3679 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3680 secondaryProgress + Window.PROGRESS_SECONDARY_START); 3681 } 3682 3683 /** 3684 * Suggests an audio stream whose volume should be changed by the hardware 3685 * volume controls. 3686 * <p> 3687 * The suggested audio stream will be tied to the window of this Activity. 3688 * If the Activity is switched, the stream set here is no longer the 3689 * suggested stream. The client does not need to save and restore the old 3690 * suggested stream value in onPause and onResume. 3691 * 3692 * @param streamType The type of the audio stream whose volume should be 3693 * changed by the hardware volume controls. It is not guaranteed that 3694 * the hardware volume controls will always change this stream's 3695 * volume (for example, if a call is in progress, its stream's volume 3696 * may be changed instead). To reset back to the default, use 3697 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 3698 */ 3699 public final void setVolumeControlStream(int streamType) { 3700 getWindow().setVolumeControlStream(streamType); 3701 } 3702 3703 /** 3704 * Gets the suggested audio stream whose volume should be changed by the 3705 * harwdare volume controls. 3706 * 3707 * @return The suggested audio stream type whose volume should be changed by 3708 * the hardware volume controls. 3709 * @see #setVolumeControlStream(int) 3710 */ 3711 public final int getVolumeControlStream() { 3712 return getWindow().getVolumeControlStream(); 3713 } 3714 3715 /** 3716 * Runs the specified action on the UI thread. If the current thread is the UI 3717 * thread, then the action is executed immediately. If the current thread is 3718 * not the UI thread, the action is posted to the event queue of the UI thread. 3719 * 3720 * @param action the action to run on the UI thread 3721 */ 3722 public final void runOnUiThread(Runnable action) { 3723 if (Thread.currentThread() != mUiThread) { 3724 mHandler.post(action); 3725 } else { 3726 action.run(); 3727 } 3728 } 3729 3730 /** 3731 * Stub implementation of {@link android.view.LayoutInflater.Factory#onCreateView} used when 3732 * inflating with the LayoutInflater returned by {@link #getSystemService}. This 3733 * implementation simply returns null for all view names. 3734 * 3735 * @see android.view.LayoutInflater#createView 3736 * @see android.view.Window#getLayoutInflater 3737 */ 3738 public View onCreateView(String name, Context context, AttributeSet attrs) { 3739 return null; 3740 } 3741 3742 /** 3743 * Bit indicating that this activity is "immersive" and should not be 3744 * interrupted by notifications if possible. 3745 * 3746 * This value is initially set by the manifest property 3747 * <code>android:immersive</code> but may be changed at runtime by 3748 * {@link #setImmersive}. 3749 * 3750 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 3751 */ 3752 public boolean isImmersive() { 3753 try { 3754 return ActivityManagerNative.getDefault().isImmersive(mToken); 3755 } catch (RemoteException e) { 3756 return false; 3757 } 3758 } 3759 3760 /** 3761 * Adjust the current immersive mode setting. 3762 * 3763 * Note that changing this value will have no effect on the activity's 3764 * {@link android.content.pm.ActivityInfo} structure; that is, if 3765 * <code>android:immersive</code> is set to <code>true</code> 3766 * in the application's manifest entry for this activity, the {@link 3767 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 3768 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 3769 * FLAG_IMMERSIVE} bit set. 3770 * 3771 * @see #isImmersive 3772 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 3773 */ 3774 public void setImmersive(boolean i) { 3775 try { 3776 ActivityManagerNative.getDefault().setImmersive(mToken, i); 3777 } catch (RemoteException e) { 3778 // pass 3779 } 3780 } 3781 3782 // ------------------ Internal API ------------------ 3783 3784 final void setParent(Activity parent) { 3785 mParent = parent; 3786 } 3787 3788 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 3789 Application application, Intent intent, ActivityInfo info, CharSequence title, 3790 Activity parent, String id, Object lastNonConfigurationInstance, 3791 Configuration config) { 3792 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 3793 lastNonConfigurationInstance, null, config); 3794 } 3795 3796 final void attach(Context context, ActivityThread aThread, 3797 Instrumentation instr, IBinder token, int ident, 3798 Application application, Intent intent, ActivityInfo info, 3799 CharSequence title, Activity parent, String id, 3800 Object lastNonConfigurationInstance, 3801 HashMap<String,Object> lastNonConfigurationChildInstances, 3802 Configuration config) { 3803 attachBaseContext(context); 3804 3805 mWindow = PolicyManager.makeNewWindow(this); 3806 mWindow.setCallback(this); 3807 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 3808 mWindow.setSoftInputMode(info.softInputMode); 3809 } 3810 mUiThread = Thread.currentThread(); 3811 3812 mMainThread = aThread; 3813 mInstrumentation = instr; 3814 mToken = token; 3815 mIdent = ident; 3816 mApplication = application; 3817 mIntent = intent; 3818 mComponent = intent.getComponent(); 3819 mActivityInfo = info; 3820 mTitle = title; 3821 mParent = parent; 3822 mEmbeddedID = id; 3823 mLastNonConfigurationInstance = lastNonConfigurationInstance; 3824 mLastNonConfigurationChildInstances = lastNonConfigurationChildInstances; 3825 3826 mWindow.setWindowManager(null, mToken, mComponent.flattenToString()); 3827 if (mParent != null) { 3828 mWindow.setContainer(mParent.getWindow()); 3829 } 3830 mWindowManager = mWindow.getWindowManager(); 3831 mCurrentConfig = config; 3832 } 3833 3834 final IBinder getActivityToken() { 3835 return mParent != null ? mParent.getActivityToken() : mToken; 3836 } 3837 3838 final void performStart() { 3839 mCalled = false; 3840 mInstrumentation.callActivityOnStart(this); 3841 if (!mCalled) { 3842 throw new SuperNotCalledException( 3843 "Activity " + mComponent.toShortString() + 3844 " did not call through to super.onStart()"); 3845 } 3846 } 3847 3848 final void performRestart() { 3849 synchronized (mManagedCursors) { 3850 final int N = mManagedCursors.size(); 3851 for (int i=0; i<N; i++) { 3852 ManagedCursor mc = mManagedCursors.get(i); 3853 if (mc.mReleased || mc.mUpdated) { 3854 mc.mCursor.requery(); 3855 mc.mReleased = false; 3856 mc.mUpdated = false; 3857 } 3858 } 3859 } 3860 3861 if (mStopped) { 3862 mStopped = false; 3863 mCalled = false; 3864 mInstrumentation.callActivityOnRestart(this); 3865 if (!mCalled) { 3866 throw new SuperNotCalledException( 3867 "Activity " + mComponent.toShortString() + 3868 " did not call through to super.onRestart()"); 3869 } 3870 performStart(); 3871 } 3872 } 3873 3874 final void performResume() { 3875 performRestart(); 3876 3877 mLastNonConfigurationInstance = null; 3878 3879 // First call onResume() -before- setting mResumed, so we don't 3880 // send out any status bar / menu notifications the client makes. 3881 mCalled = false; 3882 mInstrumentation.callActivityOnResume(this); 3883 if (!mCalled) { 3884 throw new SuperNotCalledException( 3885 "Activity " + mComponent.toShortString() + 3886 " did not call through to super.onResume()"); 3887 } 3888 3889 // Now really resume, and install the current status bar and menu. 3890 mResumed = true; 3891 mCalled = false; 3892 onPostResume(); 3893 if (!mCalled) { 3894 throw new SuperNotCalledException( 3895 "Activity " + mComponent.toShortString() + 3896 " did not call through to super.onPostResume()"); 3897 } 3898 } 3899 3900 final void performPause() { 3901 onPause(); 3902 } 3903 3904 final void performUserLeaving() { 3905 onUserInteraction(); 3906 onUserLeaveHint(); 3907 } 3908 3909 final void performStop() { 3910 if (!mStopped) { 3911 if (mWindow != null) { 3912 mWindow.closeAllPanels(); 3913 } 3914 3915 mCalled = false; 3916 mInstrumentation.callActivityOnStop(this); 3917 if (!mCalled) { 3918 throw new SuperNotCalledException( 3919 "Activity " + mComponent.toShortString() + 3920 " did not call through to super.onStop()"); 3921 } 3922 3923 synchronized (mManagedCursors) { 3924 final int N = mManagedCursors.size(); 3925 for (int i=0; i<N; i++) { 3926 ManagedCursor mc = mManagedCursors.get(i); 3927 if (!mc.mReleased) { 3928 mc.mCursor.deactivate(); 3929 mc.mReleased = true; 3930 } 3931 } 3932 } 3933 3934 mStopped = true; 3935 } 3936 mResumed = false; 3937 } 3938 3939 final boolean isResumed() { 3940 return mResumed; 3941 } 3942 3943 void dispatchActivityResult(String who, int requestCode, 3944 int resultCode, Intent data) { 3945 if (Config.LOGV) Log.v( 3946 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 3947 + ", resCode=" + resultCode + ", data=" + data); 3948 if (who == null) { 3949 onActivityResult(requestCode, resultCode, data); 3950 } 3951 } 3952} 3953