Activity.java revision 5a4010c054a4449156df885ad0f46f8db3263d87
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.app; 18 19import com.android.internal.app.ActionBarImpl; 20import com.android.internal.policy.PolicyManager; 21 22import android.content.ComponentCallbacks2; 23import android.content.ComponentName; 24import android.content.ContentResolver; 25import android.content.Context; 26import android.content.CursorLoader; 27import android.content.IIntentSender; 28import android.content.Intent; 29import android.content.IntentSender; 30import android.content.SharedPreferences; 31import android.content.pm.ActivityInfo; 32import android.content.pm.PackageManager; 33import android.content.pm.PackageManager.NameNotFoundException; 34import android.content.res.Configuration; 35import android.content.res.Resources; 36import android.content.res.TypedArray; 37import android.database.Cursor; 38import android.graphics.Bitmap; 39import android.graphics.Canvas; 40import android.graphics.drawable.Drawable; 41import android.media.AudioManager; 42import android.net.Uri; 43import android.os.Build; 44import android.os.Bundle; 45import android.os.Handler; 46import android.os.IBinder; 47import android.os.Looper; 48import android.os.Parcelable; 49import android.os.RemoteException; 50import android.os.StrictMode; 51import android.os.UserHandle; 52import android.text.Selection; 53import android.text.SpannableStringBuilder; 54import android.text.TextUtils; 55import android.text.method.TextKeyListener; 56import android.util.AttributeSet; 57import android.util.EventLog; 58import android.util.Log; 59import android.util.Slog; 60import android.util.SparseArray; 61import android.view.ActionMode; 62import android.view.ContextMenu; 63import android.view.ContextMenu.ContextMenuInfo; 64import android.view.ContextThemeWrapper; 65import android.view.KeyEvent; 66import android.view.LayoutInflater; 67import android.view.Menu; 68import android.view.MenuInflater; 69import android.view.MenuItem; 70import android.view.MotionEvent; 71import android.view.View; 72import android.view.View.OnCreateContextMenuListener; 73import android.view.ViewGroup; 74import android.view.ViewGroup.LayoutParams; 75import android.view.ViewManager; 76import android.view.Window; 77import android.view.WindowManager; 78import android.view.WindowManagerGlobal; 79import android.view.accessibility.AccessibilityEvent; 80import android.widget.AdapterView; 81 82import java.io.FileDescriptor; 83import java.io.PrintWriter; 84import java.util.ArrayList; 85import java.util.HashMap; 86 87/** 88 * An activity is a single, focused thing that the user can do. Almost all 89 * activities interact with the user, so the Activity class takes care of 90 * creating a window for you in which you can place your UI with 91 * {@link #setContentView}. While activities are often presented to the user 92 * as full-screen windows, they can also be used in other ways: as floating 93 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 94 * or embedded inside of another activity (using {@link ActivityGroup}). 95 * 96 * There are two methods almost all subclasses of Activity will implement: 97 * 98 * <ul> 99 * <li> {@link #onCreate} is where you initialize your activity. Most 100 * importantly, here you will usually call {@link #setContentView(int)} 101 * with a layout resource defining your UI, and using {@link #findViewById} 102 * to retrieve the widgets in that UI that you need to interact with 103 * programmatically. 104 * 105 * <li> {@link #onPause} is where you deal with the user leaving your 106 * activity. Most importantly, any changes made by the user should at this 107 * point be committed (usually to the 108 * {@link android.content.ContentProvider} holding the data). 109 * </ul> 110 * 111 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 112 * activity classes must have a corresponding 113 * {@link android.R.styleable#AndroidManifestActivity <activity>} 114 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 115 * 116 * <p>Topics covered here: 117 * <ol> 118 * <li><a href="#Fragments">Fragments</a> 119 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 120 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 121 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 122 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 123 * <li><a href="#Permissions">Permissions</a> 124 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 125 * </ol> 126 * 127 * <div class="special reference"> 128 * <h3>Developer Guides</h3> 129 * <p>The Activity class is an important part of an application's overall lifecycle, 130 * and the way activities are launched and put together is a fundamental 131 * part of the platform's application model. For a detailed perspective on the structure of an 132 * Android application and how activities behave, please read the 133 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a> and 134 * <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 135 * developer guides.</p> 136 * 137 * <p>You can also find a detailed discussion about how to create activities in the 138 * <a href="{@docRoot}guide/topics/fundamentals/activities.html">Activities</a> 139 * developer guide.</p> 140 * </div> 141 * 142 * <a name="Fragments"></a> 143 * <h3>Fragments</h3> 144 * 145 * <p>Starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB}, Activity 146 * implementations can make use of the {@link Fragment} class to better 147 * modularize their code, build more sophisticated user interfaces for larger 148 * screens, and help scale their application between small and large screens. 149 * 150 * <a name="ActivityLifecycle"></a> 151 * <h3>Activity Lifecycle</h3> 152 * 153 * <p>Activities in the system are managed as an <em>activity stack</em>. 154 * When a new activity is started, it is placed on the top of the stack 155 * and becomes the running activity -- the previous activity always remains 156 * below it in the stack, and will not come to the foreground again until 157 * the new activity exits.</p> 158 * 159 * <p>An activity has essentially four states:</p> 160 * <ul> 161 * <li> If an activity in the foreground of the screen (at the top of 162 * the stack), 163 * it is <em>active</em> or <em>running</em>. </li> 164 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 165 * or transparent activity has focus on top of your activity), it 166 * is <em>paused</em>. A paused activity is completely alive (it 167 * maintains all state and member information and remains attached to 168 * the window manager), but can be killed by the system in extreme 169 * low memory situations. 170 * <li>If an activity is completely obscured by another activity, 171 * it is <em>stopped</em>. It still retains all state and member information, 172 * however, it is no longer visible to the user so its window is hidden 173 * and it will often be killed by the system when memory is needed 174 * elsewhere.</li> 175 * <li>If an activity is paused or stopped, the system can drop the activity 176 * from memory by either asking it to finish, or simply killing its 177 * process. When it is displayed again to the user, it must be 178 * completely restarted and restored to its previous state.</li> 179 * </ul> 180 * 181 * <p>The following diagram shows the important state paths of an Activity. 182 * The square rectangles represent callback methods you can implement to 183 * perform operations when the Activity moves between states. The colored 184 * ovals are major states the Activity can be in.</p> 185 * 186 * <p><img src="../../../images/activity_lifecycle.png" 187 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 188 * 189 * <p>There are three key loops you may be interested in monitoring within your 190 * activity: 191 * 192 * <ul> 193 * <li>The <b>entire lifetime</b> of an activity happens between the first call 194 * to {@link android.app.Activity#onCreate} through to a single final call 195 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 196 * of "global" state in onCreate(), and release all remaining resources in 197 * onDestroy(). For example, if it has a thread running in the background 198 * to download data from the network, it may create that thread in onCreate() 199 * and then stop the thread in onDestroy(). 200 * 201 * <li>The <b>visible lifetime</b> of an activity happens between a call to 202 * {@link android.app.Activity#onStart} until a corresponding call to 203 * {@link android.app.Activity#onStop}. During this time the user can see the 204 * activity on-screen, though it may not be in the foreground and interacting 205 * with the user. Between these two methods you can maintain resources that 206 * are needed to show the activity to the user. For example, you can register 207 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 208 * that impact your UI, and unregister it in onStop() when the user no 209 * longer sees what you are displaying. The onStart() and onStop() methods 210 * can be called multiple times, as the activity becomes visible and hidden 211 * to the user. 212 * 213 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 214 * {@link android.app.Activity#onResume} until a corresponding call to 215 * {@link android.app.Activity#onPause}. During this time the activity is 216 * in front of all other activities and interacting with the user. An activity 217 * can frequently go between the resumed and paused states -- for example when 218 * the device goes to sleep, when an activity result is delivered, when a new 219 * intent is delivered -- so the code in these methods should be fairly 220 * lightweight. 221 * </ul> 222 * 223 * <p>The entire lifecycle of an activity is defined by the following 224 * Activity methods. All of these are hooks that you can override 225 * to do appropriate work when the activity changes state. All 226 * activities will implement {@link android.app.Activity#onCreate} 227 * to do their initial setup; many will also implement 228 * {@link android.app.Activity#onPause} to commit changes to data and 229 * otherwise prepare to stop interacting with the user. You should always 230 * call up to your superclass when implementing these methods.</p> 231 * 232 * </p> 233 * <pre class="prettyprint"> 234 * public class Activity extends ApplicationContext { 235 * protected void onCreate(Bundle savedInstanceState); 236 * 237 * protected void onStart(); 238 * 239 * protected void onRestart(); 240 * 241 * protected void onResume(); 242 * 243 * protected void onPause(); 244 * 245 * protected void onStop(); 246 * 247 * protected void onDestroy(); 248 * } 249 * </pre> 250 * 251 * <p>In general the movement through an activity's lifecycle looks like 252 * this:</p> 253 * 254 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 255 * <colgroup align="left" span="3" /> 256 * <colgroup align="left" /> 257 * <colgroup align="center" /> 258 * <colgroup align="center" /> 259 * 260 * <thead> 261 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 262 * </thead> 263 * 264 * <tbody> 265 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 266 * <td>Called when the activity is first created. 267 * This is where you should do all of your normal static set up: 268 * create views, bind data to lists, etc. This method also 269 * provides you with a Bundle containing the activity's previously 270 * frozen state, if there was one. 271 * <p>Always followed by <code>onStart()</code>.</td> 272 * <td align="center">No</td> 273 * <td align="center"><code>onStart()</code></td> 274 * </tr> 275 * 276 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 277 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 278 * <td>Called after your activity has been stopped, prior to it being 279 * started again. 280 * <p>Always followed by <code>onStart()</code></td> 281 * <td align="center">No</td> 282 * <td align="center"><code>onStart()</code></td> 283 * </tr> 284 * 285 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 286 * <td>Called when the activity is becoming visible to the user. 287 * <p>Followed by <code>onResume()</code> if the activity comes 288 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 289 * <td align="center">No</td> 290 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 291 * </tr> 292 * 293 * <tr><td rowspan="2" style="border-left: none;"> </td> 294 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 295 * <td>Called when the activity will start 296 * interacting with the user. At this point your activity is at 297 * the top of the activity stack, with user input going to it. 298 * <p>Always followed by <code>onPause()</code>.</td> 299 * <td align="center">No</td> 300 * <td align="center"><code>onPause()</code></td> 301 * </tr> 302 * 303 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 304 * <td>Called when the system is about to start resuming a previous 305 * activity. This is typically used to commit unsaved changes to 306 * persistent data, stop animations and other things that may be consuming 307 * CPU, etc. Implementations of this method must be very quick because 308 * the next activity will not be resumed until this method returns. 309 * <p>Followed by either <code>onResume()</code> if the activity 310 * returns back to the front, or <code>onStop()</code> if it becomes 311 * invisible to the user.</td> 312 * <td align="center"><font color="#800000"><strong>Pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB}</strong></font></td> 313 * <td align="center"><code>onResume()</code> or<br> 314 * <code>onStop()</code></td> 315 * </tr> 316 * 317 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 318 * <td>Called when the activity is no longer visible to the user, because 319 * another activity has been resumed and is covering this one. This 320 * may happen either because a new activity is being started, an existing 321 * one is being brought in front of this one, or this one is being 322 * destroyed. 323 * <p>Followed by either <code>onRestart()</code> if 324 * this activity is coming back to interact with the user, or 325 * <code>onDestroy()</code> if this activity is going away.</td> 326 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 327 * <td align="center"><code>onRestart()</code> or<br> 328 * <code>onDestroy()</code></td> 329 * </tr> 330 * 331 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 332 * <td>The final call you receive before your 333 * activity is destroyed. This can happen either because the 334 * activity is finishing (someone called {@link Activity#finish} on 335 * it, or because the system is temporarily destroying this 336 * instance of the activity to save space. You can distinguish 337 * between these two scenarios with the {@link 338 * Activity#isFinishing} method.</td> 339 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 340 * <td align="center"><em>nothing</em></td> 341 * </tr> 342 * </tbody> 343 * </table> 344 * 345 * <p>Note the "Killable" column in the above table -- for those methods that 346 * are marked as being killable, after that method returns the process hosting the 347 * activity may killed by the system <em>at any time</em> without another line 348 * of its code being executed. Because of this, you should use the 349 * {@link #onPause} method to write any persistent data (such as user edits) 350 * to storage. In addition, the method 351 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 352 * in such a background state, allowing you to save away any dynamic instance 353 * state in your activity into the given Bundle, to be later received in 354 * {@link #onCreate} if the activity needs to be re-created. 355 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 356 * section for more information on how the lifecycle of a process is tied 357 * to the activities it is hosting. Note that it is important to save 358 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 359 * because the latter is not part of the lifecycle callbacks, so will not 360 * be called in every situation as described in its documentation.</p> 361 * 362 * <p class="note">Be aware that these semantics will change slightly between 363 * applications targeting platforms starting with {@link android.os.Build.VERSION_CODES#HONEYCOMB} 364 * vs. those targeting prior platforms. Starting with Honeycomb, an application 365 * is not in the killable state until its {@link #onStop} has returned. This 366 * impacts when {@link #onSaveInstanceState(Bundle)} may be called (it may be 367 * safely called after {@link #onPause()} and allows and application to safely 368 * wait until {@link #onStop()} to save persistent state.</p> 369 * 370 * <p>For those methods that are not marked as being killable, the activity's 371 * process will not be killed by the system starting from the time the method 372 * is called and continuing after it returns. Thus an activity is in the killable 373 * state, for example, between after <code>onPause()</code> to the start of 374 * <code>onResume()</code>.</p> 375 * 376 * <a name="ConfigurationChanges"></a> 377 * <h3>Configuration Changes</h3> 378 * 379 * <p>If the configuration of the device (as defined by the 380 * {@link Configuration Resources.Configuration} class) changes, 381 * then anything displaying a user interface will need to update to match that 382 * configuration. Because Activity is the primary mechanism for interacting 383 * with the user, it includes special support for handling configuration 384 * changes.</p> 385 * 386 * <p>Unless you specify otherwise, a configuration change (such as a change 387 * in screen orientation, language, input devices, etc) will cause your 388 * current activity to be <em>destroyed</em>, going through the normal activity 389 * lifecycle process of {@link #onPause}, 390 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 391 * had been in the foreground or visible to the user, once {@link #onDestroy} is 392 * called in that instance then a new instance of the activity will be 393 * created, with whatever savedInstanceState the previous instance had generated 394 * from {@link #onSaveInstanceState}.</p> 395 * 396 * <p>This is done because any application resource, 397 * including layout files, can change based on any configuration value. Thus 398 * the only safe way to handle a configuration change is to re-retrieve all 399 * resources, including layouts, drawables, and strings. Because activities 400 * must already know how to save their state and re-create themselves from 401 * that state, this is a convenient way to have an activity restart itself 402 * with a new configuration.</p> 403 * 404 * <p>In some special cases, you may want to bypass restarting of your 405 * activity based on one or more types of configuration changes. This is 406 * done with the {@link android.R.attr#configChanges android:configChanges} 407 * attribute in its manifest. For any types of configuration changes you say 408 * that you handle there, you will receive a call to your current activity's 409 * {@link #onConfigurationChanged} method instead of being restarted. If 410 * a configuration change involves any that you do not handle, however, the 411 * activity will still be restarted and {@link #onConfigurationChanged} 412 * will not be called.</p> 413 * 414 * <a name="StartingActivities"></a> 415 * <h3>Starting Activities and Getting Results</h3> 416 * 417 * <p>The {@link android.app.Activity#startActivity} 418 * method is used to start a 419 * new activity, which will be placed at the top of the activity stack. It 420 * takes a single argument, an {@link android.content.Intent Intent}, 421 * which describes the activity 422 * to be executed.</p> 423 * 424 * <p>Sometimes you want to get a result back from an activity when it 425 * ends. For example, you may start an activity that lets the user pick 426 * a person in a list of contacts; when it ends, it returns the person 427 * that was selected. To do this, you call the 428 * {@link android.app.Activity#startActivityForResult(Intent, int)} 429 * version with a second integer parameter identifying the call. The result 430 * will come back through your {@link android.app.Activity#onActivityResult} 431 * method.</p> 432 * 433 * <p>When an activity exits, it can call 434 * {@link android.app.Activity#setResult(int)} 435 * to return data back to its parent. It must always supply a result code, 436 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 437 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 438 * return back an Intent containing any additional data it wants. All of this 439 * information appears back on the 440 * parent's <code>Activity.onActivityResult()</code>, along with the integer 441 * identifier it originally supplied.</p> 442 * 443 * <p>If a child activity fails for any reason (such as crashing), the parent 444 * activity will receive a result with the code RESULT_CANCELED.</p> 445 * 446 * <pre class="prettyprint"> 447 * public class MyActivity extends Activity { 448 * ... 449 * 450 * static final int PICK_CONTACT_REQUEST = 0; 451 * 452 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 453 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 454 * // When the user center presses, let them pick a contact. 455 * startActivityForResult( 456 * new Intent(Intent.ACTION_PICK, 457 * new Uri("content://contacts")), 458 * PICK_CONTACT_REQUEST); 459 * return true; 460 * } 461 * return false; 462 * } 463 * 464 * protected void onActivityResult(int requestCode, int resultCode, 465 * Intent data) { 466 * if (requestCode == PICK_CONTACT_REQUEST) { 467 * if (resultCode == RESULT_OK) { 468 * // A contact was picked. Here we will just display it 469 * // to the user. 470 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 471 * } 472 * } 473 * } 474 * } 475 * </pre> 476 * 477 * <a name="SavingPersistentState"></a> 478 * <h3>Saving Persistent State</h3> 479 * 480 * <p>There are generally two kinds of persistent state than an activity 481 * will deal with: shared document-like data (typically stored in a SQLite 482 * database using a {@linkplain android.content.ContentProvider content provider}) 483 * and internal state such as user preferences.</p> 484 * 485 * <p>For content provider data, we suggest that activities use a 486 * "edit in place" user model. That is, any edits a user makes are effectively 487 * made immediately without requiring an additional confirmation step. 488 * Supporting this model is generally a simple matter of following two rules:</p> 489 * 490 * <ul> 491 * <li> <p>When creating a new document, the backing database entry or file for 492 * it is created immediately. For example, if the user chooses to write 493 * a new e-mail, a new entry for that e-mail is created as soon as they 494 * start entering data, so that if they go to any other activity after 495 * that point this e-mail will now appear in the list of drafts.</p> 496 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 497 * commit to the backing content provider or file any changes the user 498 * has made. This ensures that those changes will be seen by any other 499 * activity that is about to run. You will probably want to commit 500 * your data even more aggressively at key times during your 501 * activity's lifecycle: for example before starting a new 502 * activity, before finishing your own activity, when the user 503 * switches between input fields, etc.</p> 504 * </ul> 505 * 506 * <p>This model is designed to prevent data loss when a user is navigating 507 * between activities, and allows the system to safely kill an activity (because 508 * system resources are needed somewhere else) at any time after it has been 509 * paused. Note this implies 510 * that the user pressing BACK from your activity does <em>not</em> 511 * mean "cancel" -- it means to leave the activity with its current contents 512 * saved away. Canceling edits in an activity must be provided through 513 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 514 * 515 * <p>See the {@linkplain android.content.ContentProvider content package} for 516 * more information about content providers. These are a key aspect of how 517 * different activities invoke and propagate data between themselves.</p> 518 * 519 * <p>The Activity class also provides an API for managing internal persistent state 520 * associated with an activity. This can be used, for example, to remember 521 * the user's preferred initial display in a calendar (day view or week view) 522 * or the user's default home page in a web browser.</p> 523 * 524 * <p>Activity persistent state is managed 525 * with the method {@link #getPreferences}, 526 * allowing you to retrieve and 527 * modify a set of name/value pairs associated with the activity. To use 528 * preferences that are shared across multiple application components 529 * (activities, receivers, services, providers), you can use the underlying 530 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 531 * to retrieve a preferences 532 * object stored under a specific name. 533 * (Note that it is not possible to share settings data across application 534 * packages -- for that you will need a content provider.)</p> 535 * 536 * <p>Here is an excerpt from a calendar activity that stores the user's 537 * preferred view mode in its persistent settings:</p> 538 * 539 * <pre class="prettyprint"> 540 * public class CalendarActivity extends Activity { 541 * ... 542 * 543 * static final int DAY_VIEW_MODE = 0; 544 * static final int WEEK_VIEW_MODE = 1; 545 * 546 * private SharedPreferences mPrefs; 547 * private int mCurViewMode; 548 * 549 * protected void onCreate(Bundle savedInstanceState) { 550 * super.onCreate(savedInstanceState); 551 * 552 * SharedPreferences mPrefs = getSharedPreferences(); 553 * mCurViewMode = mPrefs.getInt("view_mode", DAY_VIEW_MODE); 554 * } 555 * 556 * protected void onPause() { 557 * super.onPause(); 558 * 559 * SharedPreferences.Editor ed = mPrefs.edit(); 560 * ed.putInt("view_mode", mCurViewMode); 561 * ed.commit(); 562 * } 563 * } 564 * </pre> 565 * 566 * <a name="Permissions"></a> 567 * <h3>Permissions</h3> 568 * 569 * <p>The ability to start a particular Activity can be enforced when it is 570 * declared in its 571 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 572 * tag. By doing so, other applications will need to declare a corresponding 573 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 574 * element in their own manifest to be able to start that activity. 575 * 576 * <p>When starting an Activity you can set {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 577 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 578 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} on the Intent. This will grant the 579 * Activity access to the specific URIs in the Intent. Access will remain 580 * until the Activity has finished (it will remain across the hosting 581 * process being killed and other temporary destruction). As of 582 * {@link android.os.Build.VERSION_CODES#GINGERBREAD}, if the Activity 583 * was already created and a new Intent is being delivered to 584 * {@link #onNewIntent(Intent)}, any newly granted URI permissions will be added 585 * to the existing ones it holds. 586 * 587 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 588 * document for more information on permissions and security in general. 589 * 590 * <a name="ProcessLifecycle"></a> 591 * <h3>Process Lifecycle</h3> 592 * 593 * <p>The Android system attempts to keep application process around for as 594 * long as possible, but eventually will need to remove old processes when 595 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 596 * Lifecycle</a>, the decision about which process to remove is intimately 597 * tied to the state of the user's interaction with it. In general, there 598 * are four states a process can be in based on the activities running in it, 599 * listed here in order of importance. The system will kill less important 600 * processes (the last ones) before it resorts to killing more important 601 * processes (the first ones). 602 * 603 * <ol> 604 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 605 * that the user is currently interacting with) is considered the most important. 606 * Its process will only be killed as a last resort, if it uses more memory 607 * than is available on the device. Generally at this point the device has 608 * reached a memory paging state, so this is required in order to keep the user 609 * interface responsive. 610 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 611 * but not in the foreground, such as one sitting behind a foreground dialog) 612 * is considered extremely important and will not be killed unless that is 613 * required to keep the foreground activity running. 614 * <li> <p>A <b>background activity</b> (an activity that is not visible to 615 * the user and has been paused) is no longer critical, so the system may 616 * safely kill its process to reclaim memory for other foreground or 617 * visible processes. If its process needs to be killed, when the user navigates 618 * back to the activity (making it visible on the screen again), its 619 * {@link #onCreate} method will be called with the savedInstanceState it had previously 620 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 621 * state as the user last left it. 622 * <li> <p>An <b>empty process</b> is one hosting no activities or other 623 * application components (such as {@link Service} or 624 * {@link android.content.BroadcastReceiver} classes). These are killed very 625 * quickly by the system as memory becomes low. For this reason, any 626 * background operation you do outside of an activity must be executed in the 627 * context of an activity BroadcastReceiver or Service to ensure that the system 628 * knows it needs to keep your process around. 629 * </ol> 630 * 631 * <p>Sometimes an Activity may need to do a long-running operation that exists 632 * independently of the activity lifecycle itself. An example may be a camera 633 * application that allows you to upload a picture to a web site. The upload 634 * may take a long time, and the application should allow the user to leave 635 * the application will it is executing. To accomplish this, your Activity 636 * should start a {@link Service} in which the upload takes place. This allows 637 * the system to properly prioritize your process (considering it to be more 638 * important than other non-visible applications) for the duration of the 639 * upload, independent of whether the original activity is paused, stopped, 640 * or finished. 641 */ 642public class Activity extends ContextThemeWrapper 643 implements LayoutInflater.Factory2, 644 Window.Callback, KeyEvent.Callback, 645 OnCreateContextMenuListener, ComponentCallbacks2 { 646 private static final String TAG = "Activity"; 647 private static final boolean DEBUG_LIFECYCLE = false; 648 649 /** Standard activity result: operation canceled. */ 650 public static final int RESULT_CANCELED = 0; 651 /** Standard activity result: operation succeeded. */ 652 public static final int RESULT_OK = -1; 653 /** Start of user-defined activity results. */ 654 public static final int RESULT_FIRST_USER = 1; 655 656 static final String FRAGMENTS_TAG = "android:fragments"; 657 658 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 659 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 660 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 661 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 662 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 663 664 private static class ManagedDialog { 665 Dialog mDialog; 666 Bundle mArgs; 667 } 668 private SparseArray<ManagedDialog> mManagedDialogs; 669 670 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 671 private Instrumentation mInstrumentation; 672 private IBinder mToken; 673 private int mIdent; 674 /*package*/ String mEmbeddedID; 675 private Application mApplication; 676 /*package*/ Intent mIntent; 677 private ComponentName mComponent; 678 /*package*/ ActivityInfo mActivityInfo; 679 /*package*/ ActivityThread mMainThread; 680 Activity mParent; 681 boolean mCalled; 682 boolean mCheckedForLoaderManager; 683 boolean mLoadersStarted; 684 /*package*/ boolean mResumed; 685 private boolean mStopped; 686 boolean mFinished; 687 boolean mStartedActivity; 688 /** true if the activity is going through a transient pause */ 689 /*package*/ boolean mTemporaryPause = false; 690 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 691 /*package*/ boolean mChangingConfigurations = false; 692 /*package*/ int mConfigChangeFlags; 693 /*package*/ Configuration mCurrentConfig; 694 private SearchManager mSearchManager; 695 private MenuInflater mMenuInflater; 696 697 static final class NonConfigurationInstances { 698 Object activity; 699 HashMap<String, Object> children; 700 ArrayList<Fragment> fragments; 701 HashMap<String, LoaderManagerImpl> loaders; 702 } 703 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 704 705 private Window mWindow; 706 707 private WindowManager mWindowManager; 708 /*package*/ View mDecor = null; 709 /*package*/ boolean mWindowAdded = false; 710 /*package*/ boolean mVisibleFromServer = false; 711 /*package*/ boolean mVisibleFromClient = true; 712 /*package*/ ActionBarImpl mActionBar = null; 713 private boolean mEnableDefaultActionBarUp; 714 715 private CharSequence mTitle; 716 private int mTitleColor = 0; 717 718 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 719 final FragmentContainer mContainer = new FragmentContainer() { 720 @Override 721 public View findViewById(int id) { 722 return Activity.this.findViewById(id); 723 } 724 }; 725 726 HashMap<String, LoaderManagerImpl> mAllLoaderManagers; 727 LoaderManagerImpl mLoaderManager; 728 729 private static final class ManagedCursor { 730 ManagedCursor(Cursor cursor) { 731 mCursor = cursor; 732 mReleased = false; 733 mUpdated = false; 734 } 735 736 private final Cursor mCursor; 737 private boolean mReleased; 738 private boolean mUpdated; 739 } 740 private final ArrayList<ManagedCursor> mManagedCursors = 741 new ArrayList<ManagedCursor>(); 742 743 // protected by synchronized (this) 744 int mResultCode = RESULT_CANCELED; 745 Intent mResultData = null; 746 747 private boolean mTitleReady = false; 748 749 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 750 private SpannableStringBuilder mDefaultKeySsb = null; 751 752 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 753 754 @SuppressWarnings("unused") 755 private final Object mInstanceTracker = StrictMode.trackActivity(this); 756 757 private Thread mUiThread; 758 final Handler mHandler = new Handler(); 759 760 /** Return the intent that started this activity. */ 761 public Intent getIntent() { 762 return mIntent; 763 } 764 765 /** 766 * Change the intent returned by {@link #getIntent}. This holds a 767 * reference to the given intent; it does not copy it. Often used in 768 * conjunction with {@link #onNewIntent}. 769 * 770 * @param newIntent The new Intent object to return from getIntent 771 * 772 * @see #getIntent 773 * @see #onNewIntent 774 */ 775 public void setIntent(Intent newIntent) { 776 mIntent = newIntent; 777 } 778 779 /** Return the application that owns this activity. */ 780 public final Application getApplication() { 781 return mApplication; 782 } 783 784 /** Is this activity embedded inside of another activity? */ 785 public final boolean isChild() { 786 return mParent != null; 787 } 788 789 /** Return the parent activity if this view is an embedded child. */ 790 public final Activity getParent() { 791 return mParent; 792 } 793 794 /** Retrieve the window manager for showing custom windows. */ 795 public WindowManager getWindowManager() { 796 return mWindowManager; 797 } 798 799 /** 800 * Retrieve the current {@link android.view.Window} for the activity. 801 * This can be used to directly access parts of the Window API that 802 * are not available through Activity/Screen. 803 * 804 * @return Window The current window, or null if the activity is not 805 * visual. 806 */ 807 public Window getWindow() { 808 return mWindow; 809 } 810 811 /** 812 * Return the LoaderManager for this fragment, creating it if needed. 813 */ 814 public LoaderManager getLoaderManager() { 815 if (mLoaderManager != null) { 816 return mLoaderManager; 817 } 818 mCheckedForLoaderManager = true; 819 mLoaderManager = getLoaderManager(null, mLoadersStarted, true); 820 return mLoaderManager; 821 } 822 823 LoaderManagerImpl getLoaderManager(String who, boolean started, boolean create) { 824 if (mAllLoaderManagers == null) { 825 mAllLoaderManagers = new HashMap<String, LoaderManagerImpl>(); 826 } 827 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 828 if (lm == null) { 829 if (create) { 830 lm = new LoaderManagerImpl(who, this, started); 831 mAllLoaderManagers.put(who, lm); 832 } 833 } else { 834 lm.updateActivity(this); 835 } 836 return lm; 837 } 838 839 /** 840 * Calls {@link android.view.Window#getCurrentFocus} on the 841 * Window of this Activity to return the currently focused view. 842 * 843 * @return View The current View with focus or null. 844 * 845 * @see #getWindow 846 * @see android.view.Window#getCurrentFocus 847 */ 848 public View getCurrentFocus() { 849 return mWindow != null ? mWindow.getCurrentFocus() : null; 850 } 851 852 /** 853 * Called when the activity is starting. This is where most initialization 854 * should go: calling {@link #setContentView(int)} to inflate the 855 * activity's UI, using {@link #findViewById} to programmatically interact 856 * with widgets in the UI, calling 857 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 858 * cursors for data being displayed, etc. 859 * 860 * <p>You can call {@link #finish} from within this function, in 861 * which case onDestroy() will be immediately called without any of the rest 862 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 863 * {@link #onPause}, etc) executing. 864 * 865 * <p><em>Derived classes must call through to the super class's 866 * implementation of this method. If they do not, an exception will be 867 * thrown.</em></p> 868 * 869 * @param savedInstanceState If the activity is being re-initialized after 870 * previously being shut down then this Bundle contains the data it most 871 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 872 * 873 * @see #onStart 874 * @see #onSaveInstanceState 875 * @see #onRestoreInstanceState 876 * @see #onPostCreate 877 */ 878 protected void onCreate(Bundle savedInstanceState) { 879 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState); 880 if (mLastNonConfigurationInstances != null) { 881 mAllLoaderManagers = mLastNonConfigurationInstances.loaders; 882 } 883 if (mActivityInfo.parentActivityName != null) { 884 if (mActionBar == null) { 885 mEnableDefaultActionBarUp = true; 886 } else { 887 mActionBar.setDefaultDisplayHomeAsUpEnabled(true); 888 } 889 } 890 if (savedInstanceState != null) { 891 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 892 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 893 ? mLastNonConfigurationInstances.fragments : null); 894 } 895 mFragments.dispatchCreate(); 896 getApplication().dispatchActivityCreated(this, savedInstanceState); 897 mCalled = true; 898 } 899 900 /** 901 * The hook for {@link ActivityThread} to restore the state of this activity. 902 * 903 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 904 * {@link #restoreManagedDialogs(android.os.Bundle)}. 905 * 906 * @param savedInstanceState contains the saved state 907 */ 908 final void performRestoreInstanceState(Bundle savedInstanceState) { 909 onRestoreInstanceState(savedInstanceState); 910 restoreManagedDialogs(savedInstanceState); 911 } 912 913 /** 914 * This method is called after {@link #onStart} when the activity is 915 * being re-initialized from a previously saved state, given here in 916 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 917 * to restore their state, but it is sometimes convenient to do it here 918 * after all of the initialization has been done or to allow subclasses to 919 * decide whether to use your default implementation. The default 920 * implementation of this method performs a restore of any view state that 921 * had previously been frozen by {@link #onSaveInstanceState}. 922 * 923 * <p>This method is called between {@link #onStart} and 924 * {@link #onPostCreate}. 925 * 926 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 927 * 928 * @see #onCreate 929 * @see #onPostCreate 930 * @see #onResume 931 * @see #onSaveInstanceState 932 */ 933 protected void onRestoreInstanceState(Bundle savedInstanceState) { 934 if (mWindow != null) { 935 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 936 if (windowState != null) { 937 mWindow.restoreHierarchyState(windowState); 938 } 939 } 940 } 941 942 /** 943 * Restore the state of any saved managed dialogs. 944 * 945 * @param savedInstanceState The bundle to restore from. 946 */ 947 private void restoreManagedDialogs(Bundle savedInstanceState) { 948 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 949 if (b == null) { 950 return; 951 } 952 953 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 954 final int numDialogs = ids.length; 955 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 956 for (int i = 0; i < numDialogs; i++) { 957 final Integer dialogId = ids[i]; 958 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 959 if (dialogState != null) { 960 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 961 // so tell createDialog() not to do it, otherwise we get an exception 962 final ManagedDialog md = new ManagedDialog(); 963 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 964 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 965 if (md.mDialog != null) { 966 mManagedDialogs.put(dialogId, md); 967 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 968 md.mDialog.onRestoreInstanceState(dialogState); 969 } 970 } 971 } 972 } 973 974 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 975 final Dialog dialog = onCreateDialog(dialogId, args); 976 if (dialog == null) { 977 return null; 978 } 979 dialog.dispatchOnCreate(state); 980 return dialog; 981 } 982 983 private static String savedDialogKeyFor(int key) { 984 return SAVED_DIALOG_KEY_PREFIX + key; 985 } 986 987 private static String savedDialogArgsKeyFor(int key) { 988 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 989 } 990 991 /** 992 * Called when activity start-up is complete (after {@link #onStart} 993 * and {@link #onRestoreInstanceState} have been called). Applications will 994 * generally not implement this method; it is intended for system 995 * classes to do final initialization after application code has run. 996 * 997 * <p><em>Derived classes must call through to the super class's 998 * implementation of this method. If they do not, an exception will be 999 * thrown.</em></p> 1000 * 1001 * @param savedInstanceState If the activity is being re-initialized after 1002 * previously being shut down then this Bundle contains the data it most 1003 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1004 * @see #onCreate 1005 */ 1006 protected void onPostCreate(Bundle savedInstanceState) { 1007 if (!isChild()) { 1008 mTitleReady = true; 1009 onTitleChanged(getTitle(), getTitleColor()); 1010 } 1011 mCalled = true; 1012 } 1013 1014 /** 1015 * Called after {@link #onCreate} — or after {@link #onRestart} when 1016 * the activity had been stopped, but is now again being displayed to the 1017 * user. It will be followed by {@link #onResume}. 1018 * 1019 * <p><em>Derived classes must call through to the super class's 1020 * implementation of this method. If they do not, an exception will be 1021 * thrown.</em></p> 1022 * 1023 * @see #onCreate 1024 * @see #onStop 1025 * @see #onResume 1026 */ 1027 protected void onStart() { 1028 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStart " + this); 1029 mCalled = true; 1030 1031 if (!mLoadersStarted) { 1032 mLoadersStarted = true; 1033 if (mLoaderManager != null) { 1034 mLoaderManager.doStart(); 1035 } else if (!mCheckedForLoaderManager) { 1036 mLoaderManager = getLoaderManager(null, mLoadersStarted, false); 1037 } 1038 mCheckedForLoaderManager = true; 1039 } 1040 1041 getApplication().dispatchActivityStarted(this); 1042 } 1043 1044 /** 1045 * Called after {@link #onStop} when the current activity is being 1046 * re-displayed to the user (the user has navigated back to it). It will 1047 * be followed by {@link #onStart} and then {@link #onResume}. 1048 * 1049 * <p>For activities that are using raw {@link Cursor} objects (instead of 1050 * creating them through 1051 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1052 * this is usually the place 1053 * where the cursor should be requeried (because you had deactivated it in 1054 * {@link #onStop}. 1055 * 1056 * <p><em>Derived classes must call through to the super class's 1057 * implementation of this method. If they do not, an exception will be 1058 * thrown.</em></p> 1059 * 1060 * @see #onStop 1061 * @see #onStart 1062 * @see #onResume 1063 */ 1064 protected void onRestart() { 1065 mCalled = true; 1066 } 1067 1068 /** 1069 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1070 * {@link #onPause}, for your activity to start interacting with the user. 1071 * This is a good place to begin animations, open exclusive-access devices 1072 * (such as the camera), etc. 1073 * 1074 * <p>Keep in mind that onResume is not the best indicator that your activity 1075 * is visible to the user; a system window such as the keyguard may be in 1076 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1077 * activity is visible to the user (for example, to resume a game). 1078 * 1079 * <p><em>Derived classes must call through to the super class's 1080 * implementation of this method. If they do not, an exception will be 1081 * thrown.</em></p> 1082 * 1083 * @see #onRestoreInstanceState 1084 * @see #onRestart 1085 * @see #onPostResume 1086 * @see #onPause 1087 */ 1088 protected void onResume() { 1089 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this); 1090 getApplication().dispatchActivityResumed(this); 1091 mCalled = true; 1092 } 1093 1094 /** 1095 * Called when activity resume is complete (after {@link #onResume} has 1096 * been called). Applications will generally not implement this method; 1097 * it is intended for system classes to do final setup after application 1098 * resume code has run. 1099 * 1100 * <p><em>Derived classes must call through to the super class's 1101 * implementation of this method. If they do not, an exception will be 1102 * thrown.</em></p> 1103 * 1104 * @see #onResume 1105 */ 1106 protected void onPostResume() { 1107 final Window win = getWindow(); 1108 if (win != null) win.makeActive(); 1109 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1110 mCalled = true; 1111 } 1112 1113 /** 1114 * This is called for activities that set launchMode to "singleTop" in 1115 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1116 * flag when calling {@link #startActivity}. In either case, when the 1117 * activity is re-launched while at the top of the activity stack instead 1118 * of a new instance of the activity being started, onNewIntent() will be 1119 * called on the existing instance with the Intent that was used to 1120 * re-launch it. 1121 * 1122 * <p>An activity will always be paused before receiving a new intent, so 1123 * you can count on {@link #onResume} being called after this method. 1124 * 1125 * <p>Note that {@link #getIntent} still returns the original Intent. You 1126 * can use {@link #setIntent} to update it to this new Intent. 1127 * 1128 * @param intent The new intent that was started for the activity. 1129 * 1130 * @see #getIntent 1131 * @see #setIntent 1132 * @see #onResume 1133 */ 1134 protected void onNewIntent(Intent intent) { 1135 } 1136 1137 /** 1138 * The hook for {@link ActivityThread} to save the state of this activity. 1139 * 1140 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1141 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1142 * 1143 * @param outState The bundle to save the state to. 1144 */ 1145 final void performSaveInstanceState(Bundle outState) { 1146 onSaveInstanceState(outState); 1147 saveManagedDialogs(outState); 1148 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState); 1149 } 1150 1151 /** 1152 * Called to retrieve per-instance state from an activity before being killed 1153 * so that the state can be restored in {@link #onCreate} or 1154 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1155 * will be passed to both). 1156 * 1157 * <p>This method is called before an activity may be killed so that when it 1158 * comes back some time in the future it can restore its state. For example, 1159 * if activity B is launched in front of activity A, and at some point activity 1160 * A is killed to reclaim resources, activity A will have a chance to save the 1161 * current state of its user interface via this method so that when the user 1162 * returns to activity A, the state of the user interface can be restored 1163 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1164 * 1165 * <p>Do not confuse this method with activity lifecycle callbacks such as 1166 * {@link #onPause}, which is always called when an activity is being placed 1167 * in the background or on its way to destruction, or {@link #onStop} which 1168 * is called before destruction. One example of when {@link #onPause} and 1169 * {@link #onStop} is called and not this method is when a user navigates back 1170 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1171 * on B because that particular instance will never be restored, so the 1172 * system avoids calling it. An example when {@link #onPause} is called and 1173 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1174 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1175 * killed during the lifetime of B since the state of the user interface of 1176 * A will stay intact. 1177 * 1178 * <p>The default implementation takes care of most of the UI per-instance 1179 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1180 * view in the hierarchy that has an id, and by saving the id of the currently 1181 * focused view (all of which is restored by the default implementation of 1182 * {@link #onRestoreInstanceState}). If you override this method to save additional 1183 * information not captured by each individual view, you will likely want to 1184 * call through to the default implementation, otherwise be prepared to save 1185 * all of the state of each view yourself. 1186 * 1187 * <p>If called, this method will occur before {@link #onStop}. There are 1188 * no guarantees about whether it will occur before or after {@link #onPause}. 1189 * 1190 * @param outState Bundle in which to place your saved state. 1191 * 1192 * @see #onCreate 1193 * @see #onRestoreInstanceState 1194 * @see #onPause 1195 */ 1196 protected void onSaveInstanceState(Bundle outState) { 1197 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1198 Parcelable p = mFragments.saveAllState(); 1199 if (p != null) { 1200 outState.putParcelable(FRAGMENTS_TAG, p); 1201 } 1202 getApplication().dispatchActivitySaveInstanceState(this, outState); 1203 } 1204 1205 /** 1206 * Save the state of any managed dialogs. 1207 * 1208 * @param outState place to store the saved state. 1209 */ 1210 private void saveManagedDialogs(Bundle outState) { 1211 if (mManagedDialogs == null) { 1212 return; 1213 } 1214 1215 final int numDialogs = mManagedDialogs.size(); 1216 if (numDialogs == 0) { 1217 return; 1218 } 1219 1220 Bundle dialogState = new Bundle(); 1221 1222 int[] ids = new int[mManagedDialogs.size()]; 1223 1224 // save each dialog's bundle, gather the ids 1225 for (int i = 0; i < numDialogs; i++) { 1226 final int key = mManagedDialogs.keyAt(i); 1227 ids[i] = key; 1228 final ManagedDialog md = mManagedDialogs.valueAt(i); 1229 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1230 if (md.mArgs != null) { 1231 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1232 } 1233 } 1234 1235 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1236 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1237 } 1238 1239 1240 /** 1241 * Called as part of the activity lifecycle when an activity is going into 1242 * the background, but has not (yet) been killed. The counterpart to 1243 * {@link #onResume}. 1244 * 1245 * <p>When activity B is launched in front of activity A, this callback will 1246 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1247 * so be sure to not do anything lengthy here. 1248 * 1249 * <p>This callback is mostly used for saving any persistent state the 1250 * activity is editing, to present a "edit in place" model to the user and 1251 * making sure nothing is lost if there are not enough resources to start 1252 * the new activity without first killing this one. This is also a good 1253 * place to do things like stop animations and other things that consume a 1254 * noticeable amount of CPU in order to make the switch to the next activity 1255 * as fast as possible, or to close resources that are exclusive access 1256 * such as the camera. 1257 * 1258 * <p>In situations where the system needs more memory it may kill paused 1259 * processes to reclaim resources. Because of this, you should be sure 1260 * that all of your state is saved by the time you return from 1261 * this function. In general {@link #onSaveInstanceState} is used to save 1262 * per-instance state in the activity and this method is used to store 1263 * global persistent data (in content providers, files, etc.) 1264 * 1265 * <p>After receiving this call you will usually receive a following call 1266 * to {@link #onStop} (after the next activity has been resumed and 1267 * displayed), however in some cases there will be a direct call back to 1268 * {@link #onResume} without going through the stopped state. 1269 * 1270 * <p><em>Derived classes must call through to the super class's 1271 * implementation of this method. If they do not, an exception will be 1272 * thrown.</em></p> 1273 * 1274 * @see #onResume 1275 * @see #onSaveInstanceState 1276 * @see #onStop 1277 */ 1278 protected void onPause() { 1279 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this); 1280 getApplication().dispatchActivityPaused(this); 1281 mCalled = true; 1282 } 1283 1284 /** 1285 * Called as part of the activity lifecycle when an activity is about to go 1286 * into the background as the result of user choice. For example, when the 1287 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1288 * when an incoming phone call causes the in-call Activity to be automatically 1289 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1290 * the activity being interrupted. In cases when it is invoked, this method 1291 * is called right before the activity's {@link #onPause} callback. 1292 * 1293 * <p>This callback and {@link #onUserInteraction} are intended to help 1294 * activities manage status bar notifications intelligently; specifically, 1295 * for helping activities determine the proper time to cancel a notfication. 1296 * 1297 * @see #onUserInteraction() 1298 */ 1299 protected void onUserLeaveHint() { 1300 } 1301 1302 /** 1303 * Generate a new thumbnail for this activity. This method is called before 1304 * pausing the activity, and should draw into <var>outBitmap</var> the 1305 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1306 * can use the given <var>canvas</var>, which is configured to draw into the 1307 * bitmap, for rendering if desired. 1308 * 1309 * <p>The default implementation returns fails and does not draw a thumbnail; 1310 * this will result in the platform creating its own thumbnail if needed. 1311 * 1312 * @param outBitmap The bitmap to contain the thumbnail. 1313 * @param canvas Can be used to render into the bitmap. 1314 * 1315 * @return Return true if you have drawn into the bitmap; otherwise after 1316 * you return it will be filled with a default thumbnail. 1317 * 1318 * @see #onCreateDescription 1319 * @see #onSaveInstanceState 1320 * @see #onPause 1321 */ 1322 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1323 return false; 1324 } 1325 1326 /** 1327 * Generate a new description for this activity. This method is called 1328 * before pausing the activity and can, if desired, return some textual 1329 * description of its current state to be displayed to the user. 1330 * 1331 * <p>The default implementation returns null, which will cause you to 1332 * inherit the description from the previous activity. If all activities 1333 * return null, generally the label of the top activity will be used as the 1334 * description. 1335 * 1336 * @return A description of what the user is doing. It should be short and 1337 * sweet (only a few words). 1338 * 1339 * @see #onCreateThumbnail 1340 * @see #onSaveInstanceState 1341 * @see #onPause 1342 */ 1343 public CharSequence onCreateDescription() { 1344 return null; 1345 } 1346 1347 /** 1348 * Called when you are no longer visible to the user. You will next 1349 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1350 * depending on later user activity. 1351 * 1352 * <p>Note that this method may never be called, in low memory situations 1353 * where the system does not have enough memory to keep your activity's 1354 * process running after its {@link #onPause} method is called. 1355 * 1356 * <p><em>Derived classes must call through to the super class's 1357 * implementation of this method. If they do not, an exception will be 1358 * thrown.</em></p> 1359 * 1360 * @see #onRestart 1361 * @see #onResume 1362 * @see #onSaveInstanceState 1363 * @see #onDestroy 1364 */ 1365 protected void onStop() { 1366 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStop " + this); 1367 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1368 getApplication().dispatchActivityStopped(this); 1369 mCalled = true; 1370 } 1371 1372 /** 1373 * Perform any final cleanup before an activity is destroyed. This can 1374 * happen either because the activity is finishing (someone called 1375 * {@link #finish} on it, or because the system is temporarily destroying 1376 * this instance of the activity to save space. You can distinguish 1377 * between these two scenarios with the {@link #isFinishing} method. 1378 * 1379 * <p><em>Note: do not count on this method being called as a place for 1380 * saving data! For example, if an activity is editing data in a content 1381 * provider, those edits should be committed in either {@link #onPause} or 1382 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1383 * free resources like threads that are associated with an activity, so 1384 * that a destroyed activity does not leave such things around while the 1385 * rest of its application is still running. There are situations where 1386 * the system will simply kill the activity's hosting process without 1387 * calling this method (or any others) in it, so it should not be used to 1388 * do things that are intended to remain around after the process goes 1389 * away. 1390 * 1391 * <p><em>Derived classes must call through to the super class's 1392 * implementation of this method. If they do not, an exception will be 1393 * thrown.</em></p> 1394 * 1395 * @see #onPause 1396 * @see #onStop 1397 * @see #finish 1398 * @see #isFinishing 1399 */ 1400 protected void onDestroy() { 1401 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onDestroy " + this); 1402 mCalled = true; 1403 1404 // dismiss any dialogs we are managing. 1405 if (mManagedDialogs != null) { 1406 final int numDialogs = mManagedDialogs.size(); 1407 for (int i = 0; i < numDialogs; i++) { 1408 final ManagedDialog md = mManagedDialogs.valueAt(i); 1409 if (md.mDialog.isShowing()) { 1410 md.mDialog.dismiss(); 1411 } 1412 } 1413 mManagedDialogs = null; 1414 } 1415 1416 // close any cursors we are managing. 1417 synchronized (mManagedCursors) { 1418 int numCursors = mManagedCursors.size(); 1419 for (int i = 0; i < numCursors; i++) { 1420 ManagedCursor c = mManagedCursors.get(i); 1421 if (c != null) { 1422 c.mCursor.close(); 1423 } 1424 } 1425 mManagedCursors.clear(); 1426 } 1427 1428 // Close any open search dialog 1429 if (mSearchManager != null) { 1430 mSearchManager.stopSearch(); 1431 } 1432 1433 getApplication().dispatchActivityDestroyed(this); 1434 } 1435 1436 /** 1437 * Called by the system when the device configuration changes while your 1438 * activity is running. Note that this will <em>only</em> be called if 1439 * you have selected configurations you would like to handle with the 1440 * {@link android.R.attr#configChanges} attribute in your manifest. If 1441 * any configuration change occurs that is not selected to be reported 1442 * by that attribute, then instead of reporting it the system will stop 1443 * and restart the activity (to have it launched with the new 1444 * configuration). 1445 * 1446 * <p>At the time that this function has been called, your Resources 1447 * object will have been updated to return resource values matching the 1448 * new configuration. 1449 * 1450 * @param newConfig The new device configuration. 1451 */ 1452 public void onConfigurationChanged(Configuration newConfig) { 1453 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig); 1454 mCalled = true; 1455 1456 mFragments.dispatchConfigurationChanged(newConfig); 1457 1458 if (mWindow != null) { 1459 // Pass the configuration changed event to the window 1460 mWindow.onConfigurationChanged(newConfig); 1461 } 1462 1463 if (mActionBar != null) { 1464 // Do this last; the action bar will need to access 1465 // view changes from above. 1466 mActionBar.onConfigurationChanged(newConfig); 1467 } 1468 } 1469 1470 /** 1471 * If this activity is being destroyed because it can not handle a 1472 * configuration parameter being changed (and thus its 1473 * {@link #onConfigurationChanged(Configuration)} method is 1474 * <em>not</em> being called), then you can use this method to discover 1475 * the set of changes that have occurred while in the process of being 1476 * destroyed. Note that there is no guarantee that these will be 1477 * accurate (other changes could have happened at any time), so you should 1478 * only use this as an optimization hint. 1479 * 1480 * @return Returns a bit field of the configuration parameters that are 1481 * changing, as defined by the {@link android.content.res.Configuration} 1482 * class. 1483 */ 1484 public int getChangingConfigurations() { 1485 return mConfigChangeFlags; 1486 } 1487 1488 /** 1489 * Retrieve the non-configuration instance data that was previously 1490 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1491 * be available from the initial {@link #onCreate} and 1492 * {@link #onStart} calls to the new instance, allowing you to extract 1493 * any useful dynamic state from the previous instance. 1494 * 1495 * <p>Note that the data you retrieve here should <em>only</em> be used 1496 * as an optimization for handling configuration changes. You should always 1497 * be able to handle getting a null pointer back, and an activity must 1498 * still be able to restore itself to its previous state (through the 1499 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1500 * function returns null. 1501 * 1502 * @return Returns the object previously returned by 1503 * {@link #onRetainNonConfigurationInstance()}. 1504 * 1505 * @deprecated Use the new {@link Fragment} API 1506 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1507 * available on older platforms through the Android compatibility package. 1508 */ 1509 @Deprecated 1510 public Object getLastNonConfigurationInstance() { 1511 return mLastNonConfigurationInstances != null 1512 ? mLastNonConfigurationInstances.activity : null; 1513 } 1514 1515 /** 1516 * Called by the system, as part of destroying an 1517 * activity due to a configuration change, when it is known that a new 1518 * instance will immediately be created for the new configuration. You 1519 * can return any object you like here, including the activity instance 1520 * itself, which can later be retrieved by calling 1521 * {@link #getLastNonConfigurationInstance()} in the new activity 1522 * instance. 1523 * 1524 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1525 * or later, consider instead using a {@link Fragment} with 1526 * {@link Fragment#setRetainInstance(boolean) 1527 * Fragment.setRetainInstance(boolean}.</em> 1528 * 1529 * <p>This function is called purely as an optimization, and you must 1530 * not rely on it being called. When it is called, a number of guarantees 1531 * will be made to help optimize configuration switching: 1532 * <ul> 1533 * <li> The function will be called between {@link #onStop} and 1534 * {@link #onDestroy}. 1535 * <li> A new instance of the activity will <em>always</em> be immediately 1536 * created after this one's {@link #onDestroy()} is called. In particular, 1537 * <em>no</em> messages will be dispatched during this time (when the returned 1538 * object does not have an activity to be associated with). 1539 * <li> The object you return here will <em>always</em> be available from 1540 * the {@link #getLastNonConfigurationInstance()} method of the following 1541 * activity instance as described there. 1542 * </ul> 1543 * 1544 * <p>These guarantees are designed so that an activity can use this API 1545 * to propagate extensive state from the old to new activity instance, from 1546 * loaded bitmaps, to network connections, to evenly actively running 1547 * threads. Note that you should <em>not</em> propagate any data that 1548 * may change based on the configuration, including any data loaded from 1549 * resources such as strings, layouts, or drawables. 1550 * 1551 * <p>The guarantee of no message handling during the switch to the next 1552 * activity simplifies use with active objects. For example if your retained 1553 * state is an {@link android.os.AsyncTask} you are guaranteed that its 1554 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 1555 * not be called from the call here until you execute the next instance's 1556 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 1557 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 1558 * running in a separate thread.) 1559 * 1560 * @return Return any Object holding the desired state to propagate to the 1561 * next activity instance. 1562 * 1563 * @deprecated Use the new {@link Fragment} API 1564 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1565 * available on older platforms through the Android compatibility package. 1566 */ 1567 public Object onRetainNonConfigurationInstance() { 1568 return null; 1569 } 1570 1571 /** 1572 * Retrieve the non-configuration instance data that was previously 1573 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1574 * be available from the initial {@link #onCreate} and 1575 * {@link #onStart} calls to the new instance, allowing you to extract 1576 * any useful dynamic state from the previous instance. 1577 * 1578 * <p>Note that the data you retrieve here should <em>only</em> be used 1579 * as an optimization for handling configuration changes. You should always 1580 * be able to handle getting a null pointer back, and an activity must 1581 * still be able to restore itself to its previous state (through the 1582 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1583 * function returns null. 1584 * 1585 * @return Returns the object previously returned by 1586 * {@link #onRetainNonConfigurationChildInstances()} 1587 */ 1588 HashMap<String, Object> getLastNonConfigurationChildInstances() { 1589 return mLastNonConfigurationInstances != null 1590 ? mLastNonConfigurationInstances.children : null; 1591 } 1592 1593 /** 1594 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1595 * it should return either a mapping from child activity id strings to arbitrary objects, 1596 * or null. This method is intended to be used by Activity framework subclasses that control a 1597 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1598 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1599 */ 1600 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1601 return null; 1602 } 1603 1604 NonConfigurationInstances retainNonConfigurationInstances() { 1605 Object activity = onRetainNonConfigurationInstance(); 1606 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 1607 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 1608 boolean retainLoaders = false; 1609 if (mAllLoaderManagers != null) { 1610 // prune out any loader managers that were already stopped and so 1611 // have nothing useful to retain. 1612 LoaderManagerImpl loaders[] = new LoaderManagerImpl[mAllLoaderManagers.size()]; 1613 mAllLoaderManagers.values().toArray(loaders); 1614 if (loaders != null) { 1615 for (int i=0; i<loaders.length; i++) { 1616 LoaderManagerImpl lm = loaders[i]; 1617 if (lm.mRetaining) { 1618 retainLoaders = true; 1619 } else { 1620 lm.doDestroy(); 1621 mAllLoaderManagers.remove(lm.mWho); 1622 } 1623 } 1624 } 1625 } 1626 if (activity == null && children == null && fragments == null && !retainLoaders) { 1627 return null; 1628 } 1629 1630 NonConfigurationInstances nci = new NonConfigurationInstances(); 1631 nci.activity = activity; 1632 nci.children = children; 1633 nci.fragments = fragments; 1634 nci.loaders = mAllLoaderManagers; 1635 return nci; 1636 } 1637 1638 public void onLowMemory() { 1639 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onLowMemory " + this); 1640 mCalled = true; 1641 mFragments.dispatchLowMemory(); 1642 } 1643 1644 public void onTrimMemory(int level) { 1645 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onTrimMemory " + this + ": " + level); 1646 mCalled = true; 1647 mFragments.dispatchTrimMemory(level); 1648 } 1649 1650 /** 1651 * Return the FragmentManager for interacting with fragments associated 1652 * with this activity. 1653 */ 1654 public FragmentManager getFragmentManager() { 1655 return mFragments; 1656 } 1657 1658 void invalidateFragment(String who) { 1659 //Log.v(TAG, "invalidateFragmentIndex: index=" + index); 1660 if (mAllLoaderManagers != null) { 1661 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 1662 if (lm != null && !lm.mRetaining) { 1663 lm.doDestroy(); 1664 mAllLoaderManagers.remove(who); 1665 } 1666 } 1667 } 1668 1669 /** 1670 * Called when a Fragment is being attached to this activity, immediately 1671 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 1672 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 1673 */ 1674 public void onAttachFragment(Fragment fragment) { 1675 } 1676 1677 /** 1678 * Wrapper around 1679 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1680 * that gives the resulting {@link Cursor} to call 1681 * {@link #startManagingCursor} so that the activity will manage its 1682 * lifecycle for you. 1683 * 1684 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1685 * or later, consider instead using {@link LoaderManager} instead, available 1686 * via {@link #getLoaderManager()}.</em> 1687 * 1688 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1689 * this method, because the activity will do that for you at the appropriate time. However, if 1690 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1691 * not</em> automatically close the cursor and, in that case, you must call 1692 * {@link Cursor#close()}.</p> 1693 * 1694 * @param uri The URI of the content provider to query. 1695 * @param projection List of columns to return. 1696 * @param selection SQL WHERE clause. 1697 * @param sortOrder SQL ORDER BY clause. 1698 * 1699 * @return The Cursor that was returned by query(). 1700 * 1701 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1702 * @see #startManagingCursor 1703 * @hide 1704 * 1705 * @deprecated Use {@link CursorLoader} instead. 1706 */ 1707 @Deprecated 1708 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1709 String sortOrder) { 1710 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1711 if (c != null) { 1712 startManagingCursor(c); 1713 } 1714 return c; 1715 } 1716 1717 /** 1718 * Wrapper around 1719 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1720 * that gives the resulting {@link Cursor} to call 1721 * {@link #startManagingCursor} so that the activity will manage its 1722 * lifecycle for you. 1723 * 1724 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1725 * or later, consider instead using {@link LoaderManager} instead, available 1726 * via {@link #getLoaderManager()}.</em> 1727 * 1728 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1729 * this method, because the activity will do that for you at the appropriate time. However, if 1730 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1731 * not</em> automatically close the cursor and, in that case, you must call 1732 * {@link Cursor#close()}.</p> 1733 * 1734 * @param uri The URI of the content provider to query. 1735 * @param projection List of columns to return. 1736 * @param selection SQL WHERE clause. 1737 * @param selectionArgs The arguments to selection, if any ?s are pesent 1738 * @param sortOrder SQL ORDER BY clause. 1739 * 1740 * @return The Cursor that was returned by query(). 1741 * 1742 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1743 * @see #startManagingCursor 1744 * 1745 * @deprecated Use {@link CursorLoader} instead. 1746 */ 1747 @Deprecated 1748 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1749 String[] selectionArgs, String sortOrder) { 1750 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1751 if (c != null) { 1752 startManagingCursor(c); 1753 } 1754 return c; 1755 } 1756 1757 /** 1758 * This method allows the activity to take care of managing the given 1759 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1760 * That is, when the activity is stopped it will automatically call 1761 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1762 * it will call {@link Cursor#requery} for you. When the activity is 1763 * destroyed, all managed Cursors will be closed automatically. 1764 * 1765 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1766 * or later, consider instead using {@link LoaderManager} instead, available 1767 * via {@link #getLoaderManager()}.</em> 1768 * 1769 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 1770 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 1771 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 1772 * <em>will not</em> automatically close the cursor and, in that case, you must call 1773 * {@link Cursor#close()}.</p> 1774 * 1775 * @param c The Cursor to be managed. 1776 * 1777 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1778 * @see #stopManagingCursor 1779 * 1780 * @deprecated Use the new {@link android.content.CursorLoader} class with 1781 * {@link LoaderManager} instead; this is also 1782 * available on older platforms through the Android compatibility package. 1783 */ 1784 @Deprecated 1785 public void startManagingCursor(Cursor c) { 1786 synchronized (mManagedCursors) { 1787 mManagedCursors.add(new ManagedCursor(c)); 1788 } 1789 } 1790 1791 /** 1792 * Given a Cursor that was previously given to 1793 * {@link #startManagingCursor}, stop the activity's management of that 1794 * cursor. 1795 * 1796 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 1797 * the system <em>will not</em> automatically close the cursor and you must call 1798 * {@link Cursor#close()}.</p> 1799 * 1800 * @param c The Cursor that was being managed. 1801 * 1802 * @see #startManagingCursor 1803 * 1804 * @deprecated Use the new {@link android.content.CursorLoader} class with 1805 * {@link LoaderManager} instead; this is also 1806 * available on older platforms through the Android compatibility package. 1807 */ 1808 @Deprecated 1809 public void stopManagingCursor(Cursor c) { 1810 synchronized (mManagedCursors) { 1811 final int N = mManagedCursors.size(); 1812 for (int i=0; i<N; i++) { 1813 ManagedCursor mc = mManagedCursors.get(i); 1814 if (mc.mCursor == c) { 1815 mManagedCursors.remove(i); 1816 break; 1817 } 1818 } 1819 } 1820 } 1821 1822 /** 1823 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 1824 * this is a no-op. 1825 * @hide 1826 */ 1827 @Deprecated 1828 public void setPersistent(boolean isPersistent) { 1829 } 1830 1831 /** 1832 * Finds a view that was identified by the id attribute from the XML that 1833 * was processed in {@link #onCreate}. 1834 * 1835 * @return The view if found or null otherwise. 1836 */ 1837 public View findViewById(int id) { 1838 return getWindow().findViewById(id); 1839 } 1840 1841 /** 1842 * Retrieve a reference to this activity's ActionBar. 1843 * 1844 * @return The Activity's ActionBar, or null if it does not have one. 1845 */ 1846 public ActionBar getActionBar() { 1847 initActionBar(); 1848 return mActionBar; 1849 } 1850 1851 /** 1852 * Creates a new ActionBar, locates the inflated ActionBarView, 1853 * initializes the ActionBar with the view, and sets mActionBar. 1854 */ 1855 private void initActionBar() { 1856 Window window = getWindow(); 1857 1858 // Initializing the window decor can change window feature flags. 1859 // Make sure that we have the correct set before performing the test below. 1860 window.getDecorView(); 1861 1862 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 1863 return; 1864 } 1865 1866 mActionBar = new ActionBarImpl(this); 1867 mActionBar.setDefaultDisplayHomeAsUpEnabled(mEnableDefaultActionBarUp); 1868 } 1869 1870 /** 1871 * Set the activity content from a layout resource. The resource will be 1872 * inflated, adding all top-level views to the activity. 1873 * 1874 * @param layoutResID Resource ID to be inflated. 1875 * 1876 * @see #setContentView(android.view.View) 1877 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1878 */ 1879 public void setContentView(int layoutResID) { 1880 getWindow().setContentView(layoutResID); 1881 initActionBar(); 1882 } 1883 1884 /** 1885 * Set the activity content to an explicit view. This view is placed 1886 * directly into the activity's view hierarchy. It can itself be a complex 1887 * view hierarchy. When calling this method, the layout parameters of the 1888 * specified view are ignored. Both the width and the height of the view are 1889 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 1890 * your own layout parameters, invoke 1891 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 1892 * instead. 1893 * 1894 * @param view The desired content to display. 1895 * 1896 * @see #setContentView(int) 1897 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1898 */ 1899 public void setContentView(View view) { 1900 getWindow().setContentView(view); 1901 initActionBar(); 1902 } 1903 1904 /** 1905 * Set the activity content to an explicit view. This view is placed 1906 * directly into the activity's view hierarchy. It can itself be a complex 1907 * view hierarchy. 1908 * 1909 * @param view The desired content to display. 1910 * @param params Layout parameters for the view. 1911 * 1912 * @see #setContentView(android.view.View) 1913 * @see #setContentView(int) 1914 */ 1915 public void setContentView(View view, ViewGroup.LayoutParams params) { 1916 getWindow().setContentView(view, params); 1917 initActionBar(); 1918 } 1919 1920 /** 1921 * Add an additional content view to the activity. Added after any existing 1922 * ones in the activity -- existing views are NOT removed. 1923 * 1924 * @param view The desired content to display. 1925 * @param params Layout parameters for the view. 1926 */ 1927 public void addContentView(View view, ViewGroup.LayoutParams params) { 1928 getWindow().addContentView(view, params); 1929 initActionBar(); 1930 } 1931 1932 /** 1933 * Sets whether this activity is finished when touched outside its window's 1934 * bounds. 1935 */ 1936 public void setFinishOnTouchOutside(boolean finish) { 1937 mWindow.setCloseOnTouchOutside(finish); 1938 } 1939 1940 /** 1941 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1942 * keys. 1943 * 1944 * @see #setDefaultKeyMode 1945 */ 1946 static public final int DEFAULT_KEYS_DISABLE = 0; 1947 /** 1948 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1949 * key handling. 1950 * 1951 * @see #setDefaultKeyMode 1952 */ 1953 static public final int DEFAULT_KEYS_DIALER = 1; 1954 /** 1955 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1956 * default key handling. 1957 * 1958 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1959 * 1960 * @see #setDefaultKeyMode 1961 */ 1962 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1963 /** 1964 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1965 * will start an application-defined search. (If the application or activity does not 1966 * actually define a search, the the keys will be ignored.) 1967 * 1968 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1969 * 1970 * @see #setDefaultKeyMode 1971 */ 1972 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1973 1974 /** 1975 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1976 * will start a global search (typically web search, but some platforms may define alternate 1977 * methods for global search) 1978 * 1979 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1980 * 1981 * @see #setDefaultKeyMode 1982 */ 1983 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1984 1985 /** 1986 * Select the default key handling for this activity. This controls what 1987 * will happen to key events that are not otherwise handled. The default 1988 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1989 * floor. Other modes allow you to launch the dialer 1990 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1991 * menu without requiring the menu key be held down 1992 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1993 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1994 * 1995 * <p>Note that the mode selected here does not impact the default 1996 * handling of system keys, such as the "back" and "menu" keys, and your 1997 * activity and its views always get a first chance to receive and handle 1998 * all application keys. 1999 * 2000 * @param mode The desired default key mode constant. 2001 * 2002 * @see #DEFAULT_KEYS_DISABLE 2003 * @see #DEFAULT_KEYS_DIALER 2004 * @see #DEFAULT_KEYS_SHORTCUT 2005 * @see #DEFAULT_KEYS_SEARCH_LOCAL 2006 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 2007 * @see #onKeyDown 2008 */ 2009 public final void setDefaultKeyMode(int mode) { 2010 mDefaultKeyMode = mode; 2011 2012 // Some modes use a SpannableStringBuilder to track & dispatch input events 2013 // This list must remain in sync with the switch in onKeyDown() 2014 switch (mode) { 2015 case DEFAULT_KEYS_DISABLE: 2016 case DEFAULT_KEYS_SHORTCUT: 2017 mDefaultKeySsb = null; // not used in these modes 2018 break; 2019 case DEFAULT_KEYS_DIALER: 2020 case DEFAULT_KEYS_SEARCH_LOCAL: 2021 case DEFAULT_KEYS_SEARCH_GLOBAL: 2022 mDefaultKeySsb = new SpannableStringBuilder(); 2023 Selection.setSelection(mDefaultKeySsb,0); 2024 break; 2025 default: 2026 throw new IllegalArgumentException(); 2027 } 2028 } 2029 2030 /** 2031 * Called when a key was pressed down and not handled by any of the views 2032 * inside of the activity. So, for example, key presses while the cursor 2033 * is inside a TextView will not trigger the event (unless it is a navigation 2034 * to another object) because TextView handles its own key presses. 2035 * 2036 * <p>If the focused view didn't want this event, this method is called. 2037 * 2038 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2039 * by calling {@link #onBackPressed()}, though the behavior varies based 2040 * on the application compatibility mode: for 2041 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2042 * it will set up the dispatch to call {@link #onKeyUp} where the action 2043 * will be performed; for earlier applications, it will perform the 2044 * action immediately in on-down, as those versions of the platform 2045 * behaved. 2046 * 2047 * <p>Other additional default key handling may be performed 2048 * if configured with {@link #setDefaultKeyMode}. 2049 * 2050 * @return Return <code>true</code> to prevent this event from being propagated 2051 * further, or <code>false</code> to indicate that you have not handled 2052 * this event and it should continue to be propagated. 2053 * @see #onKeyUp 2054 * @see android.view.KeyEvent 2055 */ 2056 public boolean onKeyDown(int keyCode, KeyEvent event) { 2057 if (keyCode == KeyEvent.KEYCODE_BACK) { 2058 if (getApplicationInfo().targetSdkVersion 2059 >= Build.VERSION_CODES.ECLAIR) { 2060 event.startTracking(); 2061 } else { 2062 onBackPressed(); 2063 } 2064 return true; 2065 } 2066 2067 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2068 return false; 2069 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2070 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 2071 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2072 return true; 2073 } 2074 return false; 2075 } else { 2076 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2077 boolean clearSpannable = false; 2078 boolean handled; 2079 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2080 clearSpannable = true; 2081 handled = false; 2082 } else { 2083 handled = TextKeyListener.getInstance().onKeyDown( 2084 null, mDefaultKeySsb, keyCode, event); 2085 if (handled && mDefaultKeySsb.length() > 0) { 2086 // something useable has been typed - dispatch it now. 2087 2088 final String str = mDefaultKeySsb.toString(); 2089 clearSpannable = true; 2090 2091 switch (mDefaultKeyMode) { 2092 case DEFAULT_KEYS_DIALER: 2093 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2094 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2095 startActivity(intent); 2096 break; 2097 case DEFAULT_KEYS_SEARCH_LOCAL: 2098 startSearch(str, false, null, false); 2099 break; 2100 case DEFAULT_KEYS_SEARCH_GLOBAL: 2101 startSearch(str, false, null, true); 2102 break; 2103 } 2104 } 2105 } 2106 if (clearSpannable) { 2107 mDefaultKeySsb.clear(); 2108 mDefaultKeySsb.clearSpans(); 2109 Selection.setSelection(mDefaultKeySsb,0); 2110 } 2111 return handled; 2112 } 2113 } 2114 2115 /** 2116 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2117 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2118 * the event). 2119 */ 2120 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2121 return false; 2122 } 2123 2124 /** 2125 * Called when a key was released and not handled by any of the views 2126 * inside of the activity. So, for example, key presses while the cursor 2127 * is inside a TextView will not trigger the event (unless it is a navigation 2128 * to another object) because TextView handles its own key presses. 2129 * 2130 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2131 * and go back. 2132 * 2133 * @return Return <code>true</code> to prevent this event from being propagated 2134 * further, or <code>false</code> to indicate that you have not handled 2135 * this event and it should continue to be propagated. 2136 * @see #onKeyDown 2137 * @see KeyEvent 2138 */ 2139 public boolean onKeyUp(int keyCode, KeyEvent event) { 2140 if (getApplicationInfo().targetSdkVersion 2141 >= Build.VERSION_CODES.ECLAIR) { 2142 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2143 && !event.isCanceled()) { 2144 onBackPressed(); 2145 return true; 2146 } 2147 } 2148 return false; 2149 } 2150 2151 /** 2152 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2153 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2154 * the event). 2155 */ 2156 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2157 return false; 2158 } 2159 2160 /** 2161 * Called when the activity has detected the user's press of the back 2162 * key. The default implementation simply finishes the current activity, 2163 * but you can override this to do whatever you want. 2164 */ 2165 public void onBackPressed() { 2166 if (!mFragments.popBackStackImmediate()) { 2167 finish(); 2168 } 2169 } 2170 2171 /** 2172 * Called when a key shortcut event is not handled by any of the views in the Activity. 2173 * Override this method to implement global key shortcuts for the Activity. 2174 * Key shortcuts can also be implemented by setting the 2175 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2176 * 2177 * @param keyCode The value in event.getKeyCode(). 2178 * @param event Description of the key event. 2179 * @return True if the key shortcut was handled. 2180 */ 2181 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2182 return false; 2183 } 2184 2185 /** 2186 * Called when a touch screen event was not handled by any of the views 2187 * under it. This is most useful to process touch events that happen 2188 * outside of your window bounds, where there is no view to receive it. 2189 * 2190 * @param event The touch screen event being processed. 2191 * 2192 * @return Return true if you have consumed the event, false if you haven't. 2193 * The default implementation always returns false. 2194 */ 2195 public boolean onTouchEvent(MotionEvent event) { 2196 if (mWindow.shouldCloseOnTouch(this, event)) { 2197 finish(); 2198 return true; 2199 } 2200 2201 return false; 2202 } 2203 2204 /** 2205 * Called when the trackball was moved and not handled by any of the 2206 * views inside of the activity. So, for example, if the trackball moves 2207 * while focus is on a button, you will receive a call here because 2208 * buttons do not normally do anything with trackball events. The call 2209 * here happens <em>before</em> trackball movements are converted to 2210 * DPAD key events, which then get sent back to the view hierarchy, and 2211 * will be processed at the point for things like focus navigation. 2212 * 2213 * @param event The trackball event being processed. 2214 * 2215 * @return Return true if you have consumed the event, false if you haven't. 2216 * The default implementation always returns false. 2217 */ 2218 public boolean onTrackballEvent(MotionEvent event) { 2219 return false; 2220 } 2221 2222 /** 2223 * Called when a generic motion event was not handled by any of the 2224 * views inside of the activity. 2225 * <p> 2226 * Generic motion events describe joystick movements, mouse hovers, track pad 2227 * touches, scroll wheel movements and other input events. The 2228 * {@link MotionEvent#getSource() source} of the motion event specifies 2229 * the class of input that was received. Implementations of this method 2230 * must examine the bits in the source before processing the event. 2231 * The following code example shows how this is done. 2232 * </p><p> 2233 * Generic motion events with source class 2234 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2235 * are delivered to the view under the pointer. All other generic motion events are 2236 * delivered to the focused view. 2237 * </p><p> 2238 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2239 * handle this event. 2240 * </p> 2241 * 2242 * @param event The generic motion event being processed. 2243 * 2244 * @return Return true if you have consumed the event, false if you haven't. 2245 * The default implementation always returns false. 2246 */ 2247 public boolean onGenericMotionEvent(MotionEvent event) { 2248 return false; 2249 } 2250 2251 /** 2252 * Called whenever a key, touch, or trackball event is dispatched to the 2253 * activity. Implement this method if you wish to know that the user has 2254 * interacted with the device in some way while your activity is running. 2255 * This callback and {@link #onUserLeaveHint} are intended to help 2256 * activities manage status bar notifications intelligently; specifically, 2257 * for helping activities determine the proper time to cancel a notfication. 2258 * 2259 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2260 * be accompanied by calls to {@link #onUserInteraction}. This 2261 * ensures that your activity will be told of relevant user activity such 2262 * as pulling down the notification pane and touching an item there. 2263 * 2264 * <p>Note that this callback will be invoked for the touch down action 2265 * that begins a touch gesture, but may not be invoked for the touch-moved 2266 * and touch-up actions that follow. 2267 * 2268 * @see #onUserLeaveHint() 2269 */ 2270 public void onUserInteraction() { 2271 } 2272 2273 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2274 // Update window manager if: we have a view, that view is 2275 // attached to its parent (which will be a RootView), and 2276 // this activity is not embedded. 2277 if (mParent == null) { 2278 View decor = mDecor; 2279 if (decor != null && decor.getParent() != null) { 2280 getWindowManager().updateViewLayout(decor, params); 2281 } 2282 } 2283 } 2284 2285 public void onContentChanged() { 2286 } 2287 2288 /** 2289 * Called when the current {@link Window} of the activity gains or loses 2290 * focus. This is the best indicator of whether this activity is visible 2291 * to the user. The default implementation clears the key tracking 2292 * state, so should always be called. 2293 * 2294 * <p>Note that this provides information about global focus state, which 2295 * is managed independently of activity lifecycles. As such, while focus 2296 * changes will generally have some relation to lifecycle changes (an 2297 * activity that is stopped will not generally get window focus), you 2298 * should not rely on any particular order between the callbacks here and 2299 * those in the other lifecycle methods such as {@link #onResume}. 2300 * 2301 * <p>As a general rule, however, a resumed activity will have window 2302 * focus... unless it has displayed other dialogs or popups that take 2303 * input focus, in which case the activity itself will not have focus 2304 * when the other windows have it. Likewise, the system may display 2305 * system-level windows (such as the status bar notification panel or 2306 * a system alert) which will temporarily take window input focus without 2307 * pausing the foreground activity. 2308 * 2309 * @param hasFocus Whether the window of this activity has focus. 2310 * 2311 * @see #hasWindowFocus() 2312 * @see #onResume 2313 * @see View#onWindowFocusChanged(boolean) 2314 */ 2315 public void onWindowFocusChanged(boolean hasFocus) { 2316 } 2317 2318 /** 2319 * Called when the main window associated with the activity has been 2320 * attached to the window manager. 2321 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2322 * for more information. 2323 * @see View#onAttachedToWindow 2324 */ 2325 public void onAttachedToWindow() { 2326 } 2327 2328 /** 2329 * Called when the main window associated with the activity has been 2330 * detached from the window manager. 2331 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2332 * for more information. 2333 * @see View#onDetachedFromWindow 2334 */ 2335 public void onDetachedFromWindow() { 2336 } 2337 2338 /** 2339 * Returns true if this activity's <em>main</em> window currently has window focus. 2340 * Note that this is not the same as the view itself having focus. 2341 * 2342 * @return True if this activity's main window currently has window focus. 2343 * 2344 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2345 */ 2346 public boolean hasWindowFocus() { 2347 Window w = getWindow(); 2348 if (w != null) { 2349 View d = w.getDecorView(); 2350 if (d != null) { 2351 return d.hasWindowFocus(); 2352 } 2353 } 2354 return false; 2355 } 2356 2357 /** 2358 * Called to process key events. You can override this to intercept all 2359 * key events before they are dispatched to the window. Be sure to call 2360 * this implementation for key events that should be handled normally. 2361 * 2362 * @param event The key event. 2363 * 2364 * @return boolean Return true if this event was consumed. 2365 */ 2366 public boolean dispatchKeyEvent(KeyEvent event) { 2367 onUserInteraction(); 2368 Window win = getWindow(); 2369 if (win.superDispatchKeyEvent(event)) { 2370 return true; 2371 } 2372 View decor = mDecor; 2373 if (decor == null) decor = win.getDecorView(); 2374 return event.dispatch(this, decor != null 2375 ? decor.getKeyDispatcherState() : null, this); 2376 } 2377 2378 /** 2379 * Called to process a key shortcut event. 2380 * You can override this to intercept all key shortcut events before they are 2381 * dispatched to the window. Be sure to call this implementation for key shortcut 2382 * events that should be handled normally. 2383 * 2384 * @param event The key shortcut event. 2385 * @return True if this event was consumed. 2386 */ 2387 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 2388 onUserInteraction(); 2389 if (getWindow().superDispatchKeyShortcutEvent(event)) { 2390 return true; 2391 } 2392 return onKeyShortcut(event.getKeyCode(), event); 2393 } 2394 2395 /** 2396 * Called to process touch screen events. You can override this to 2397 * intercept all touch screen events before they are dispatched to the 2398 * window. Be sure to call this implementation for touch screen events 2399 * that should be handled normally. 2400 * 2401 * @param ev The touch screen event. 2402 * 2403 * @return boolean Return true if this event was consumed. 2404 */ 2405 public boolean dispatchTouchEvent(MotionEvent ev) { 2406 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2407 onUserInteraction(); 2408 } 2409 if (getWindow().superDispatchTouchEvent(ev)) { 2410 return true; 2411 } 2412 return onTouchEvent(ev); 2413 } 2414 2415 /** 2416 * Called to process trackball events. You can override this to 2417 * intercept all trackball events before they are dispatched to the 2418 * window. Be sure to call this implementation for trackball events 2419 * that should be handled normally. 2420 * 2421 * @param ev The trackball event. 2422 * 2423 * @return boolean Return true if this event was consumed. 2424 */ 2425 public boolean dispatchTrackballEvent(MotionEvent ev) { 2426 onUserInteraction(); 2427 if (getWindow().superDispatchTrackballEvent(ev)) { 2428 return true; 2429 } 2430 return onTrackballEvent(ev); 2431 } 2432 2433 /** 2434 * Called to process generic motion events. You can override this to 2435 * intercept all generic motion events before they are dispatched to the 2436 * window. Be sure to call this implementation for generic motion events 2437 * that should be handled normally. 2438 * 2439 * @param ev The generic motion event. 2440 * 2441 * @return boolean Return true if this event was consumed. 2442 */ 2443 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 2444 onUserInteraction(); 2445 if (getWindow().superDispatchGenericMotionEvent(ev)) { 2446 return true; 2447 } 2448 return onGenericMotionEvent(ev); 2449 } 2450 2451 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2452 event.setClassName(getClass().getName()); 2453 event.setPackageName(getPackageName()); 2454 2455 LayoutParams params = getWindow().getAttributes(); 2456 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2457 (params.height == LayoutParams.MATCH_PARENT); 2458 event.setFullScreen(isFullScreen); 2459 2460 CharSequence title = getTitle(); 2461 if (!TextUtils.isEmpty(title)) { 2462 event.getText().add(title); 2463 } 2464 2465 return true; 2466 } 2467 2468 /** 2469 * Default implementation of 2470 * {@link android.view.Window.Callback#onCreatePanelView} 2471 * for activities. This 2472 * simply returns null so that all panel sub-windows will have the default 2473 * menu behavior. 2474 */ 2475 public View onCreatePanelView(int featureId) { 2476 return null; 2477 } 2478 2479 /** 2480 * Default implementation of 2481 * {@link android.view.Window.Callback#onCreatePanelMenu} 2482 * for activities. This calls through to the new 2483 * {@link #onCreateOptionsMenu} method for the 2484 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2485 * so that subclasses of Activity don't need to deal with feature codes. 2486 */ 2487 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2488 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2489 boolean show = onCreateOptionsMenu(menu); 2490 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 2491 return show; 2492 } 2493 return false; 2494 } 2495 2496 /** 2497 * Default implementation of 2498 * {@link android.view.Window.Callback#onPreparePanel} 2499 * for activities. This 2500 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2501 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2502 * panel, so that subclasses of 2503 * Activity don't need to deal with feature codes. 2504 */ 2505 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2506 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2507 boolean goforit = onPrepareOptionsMenu(menu); 2508 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 2509 return goforit; 2510 } 2511 return true; 2512 } 2513 2514 /** 2515 * {@inheritDoc} 2516 * 2517 * @return The default implementation returns true. 2518 */ 2519 public boolean onMenuOpened(int featureId, Menu menu) { 2520 if (featureId == Window.FEATURE_ACTION_BAR) { 2521 initActionBar(); 2522 if (mActionBar != null) { 2523 mActionBar.dispatchMenuVisibilityChanged(true); 2524 } else { 2525 Log.e(TAG, "Tried to open action bar menu with no action bar"); 2526 } 2527 } 2528 return true; 2529 } 2530 2531 /** 2532 * Default implementation of 2533 * {@link android.view.Window.Callback#onMenuItemSelected} 2534 * for activities. This calls through to the new 2535 * {@link #onOptionsItemSelected} method for the 2536 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2537 * panel, so that subclasses of 2538 * Activity don't need to deal with feature codes. 2539 */ 2540 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2541 switch (featureId) { 2542 case Window.FEATURE_OPTIONS_PANEL: 2543 // Put event logging here so it gets called even if subclass 2544 // doesn't call through to superclass's implmeentation of each 2545 // of these methods below 2546 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2547 if (onOptionsItemSelected(item)) { 2548 return true; 2549 } 2550 if (mFragments.dispatchOptionsItemSelected(item)) { 2551 return true; 2552 } 2553 if (item.getItemId() == android.R.id.home && mActionBar != null && 2554 (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) { 2555 if (mParent == null) { 2556 return onNavigateUp(); 2557 } else { 2558 return mParent.onNavigateUpFromChild(this); 2559 } 2560 } 2561 return false; 2562 2563 case Window.FEATURE_CONTEXT_MENU: 2564 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2565 if (onContextItemSelected(item)) { 2566 return true; 2567 } 2568 return mFragments.dispatchContextItemSelected(item); 2569 2570 default: 2571 return false; 2572 } 2573 } 2574 2575 /** 2576 * Default implementation of 2577 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2578 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2579 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2580 * so that subclasses of Activity don't need to deal with feature codes. 2581 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2582 * {@link #onContextMenuClosed(Menu)} will be called. 2583 */ 2584 public void onPanelClosed(int featureId, Menu menu) { 2585 switch (featureId) { 2586 case Window.FEATURE_OPTIONS_PANEL: 2587 mFragments.dispatchOptionsMenuClosed(menu); 2588 onOptionsMenuClosed(menu); 2589 break; 2590 2591 case Window.FEATURE_CONTEXT_MENU: 2592 onContextMenuClosed(menu); 2593 break; 2594 2595 case Window.FEATURE_ACTION_BAR: 2596 initActionBar(); 2597 mActionBar.dispatchMenuVisibilityChanged(false); 2598 break; 2599 } 2600 } 2601 2602 /** 2603 * Declare that the options menu has changed, so should be recreated. 2604 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 2605 * time it needs to be displayed. 2606 */ 2607 public void invalidateOptionsMenu() { 2608 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 2609 } 2610 2611 /** 2612 * Initialize the contents of the Activity's standard options menu. You 2613 * should place your menu items in to <var>menu</var>. 2614 * 2615 * <p>This is only called once, the first time the options menu is 2616 * displayed. To update the menu every time it is displayed, see 2617 * {@link #onPrepareOptionsMenu}. 2618 * 2619 * <p>The default implementation populates the menu with standard system 2620 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2621 * they will be correctly ordered with application-defined menu items. 2622 * Deriving classes should always call through to the base implementation. 2623 * 2624 * <p>You can safely hold on to <var>menu</var> (and any items created 2625 * from it), making modifications to it as desired, until the next 2626 * time onCreateOptionsMenu() is called. 2627 * 2628 * <p>When you add items to the menu, you can implement the Activity's 2629 * {@link #onOptionsItemSelected} method to handle them there. 2630 * 2631 * @param menu The options menu in which you place your items. 2632 * 2633 * @return You must return true for the menu to be displayed; 2634 * if you return false it will not be shown. 2635 * 2636 * @see #onPrepareOptionsMenu 2637 * @see #onOptionsItemSelected 2638 */ 2639 public boolean onCreateOptionsMenu(Menu menu) { 2640 if (mParent != null) { 2641 return mParent.onCreateOptionsMenu(menu); 2642 } 2643 return true; 2644 } 2645 2646 /** 2647 * Prepare the Screen's standard options menu to be displayed. This is 2648 * called right before the menu is shown, every time it is shown. You can 2649 * use this method to efficiently enable/disable items or otherwise 2650 * dynamically modify the contents. 2651 * 2652 * <p>The default implementation updates the system menu items based on the 2653 * activity's state. Deriving classes should always call through to the 2654 * base class implementation. 2655 * 2656 * @param menu The options menu as last shown or first initialized by 2657 * onCreateOptionsMenu(). 2658 * 2659 * @return You must return true for the menu to be displayed; 2660 * if you return false it will not be shown. 2661 * 2662 * @see #onCreateOptionsMenu 2663 */ 2664 public boolean onPrepareOptionsMenu(Menu menu) { 2665 if (mParent != null) { 2666 return mParent.onPrepareOptionsMenu(menu); 2667 } 2668 return true; 2669 } 2670 2671 /** 2672 * This hook is called whenever an item in your options menu is selected. 2673 * The default implementation simply returns false to have the normal 2674 * processing happen (calling the item's Runnable or sending a message to 2675 * its Handler as appropriate). You can use this method for any items 2676 * for which you would like to do processing without those other 2677 * facilities. 2678 * 2679 * <p>Derived classes should call through to the base class for it to 2680 * perform the default menu handling.</p> 2681 * 2682 * @param item The menu item that was selected. 2683 * 2684 * @return boolean Return false to allow normal menu processing to 2685 * proceed, true to consume it here. 2686 * 2687 * @see #onCreateOptionsMenu 2688 */ 2689 public boolean onOptionsItemSelected(MenuItem item) { 2690 if (mParent != null) { 2691 return mParent.onOptionsItemSelected(item); 2692 } 2693 return false; 2694 } 2695 2696 /** 2697 * This method is called whenever the user chooses to navigate Up within your application's 2698 * activity hierarchy from the action bar. 2699 * 2700 * <p>If the attribute {@link android.R.attr#parentActivityName parentActivityName} 2701 * was specified in the manifest for this activity or an activity-alias to it, 2702 * default Up navigation will be handled automatically. If any activity 2703 * along the parent chain requires extra Intent arguments, the Activity subclass 2704 * should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)} 2705 * to supply those arguments.</p> 2706 * 2707 * <p>See <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 2708 * from the developer guide and <a href="{@docRoot}design/patterns/navigation.html">Navigation</a> 2709 * from the design guide for more information about navigating within your app.</p> 2710 * 2711 * <p>See the {@link TaskStackBuilder} class and the Activity methods 2712 * {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and 2713 * {@link #navigateUpTo(Intent)} for help implementing custom Up navigation. 2714 * The AppNavigation sample application in the Android SDK is also available for reference.</p> 2715 * 2716 * @return true if Up navigation completed successfully and this Activity was finished, 2717 * false otherwise. 2718 */ 2719 public boolean onNavigateUp() { 2720 // Automatically handle hierarchical Up navigation if the proper 2721 // metadata is available. 2722 Intent upIntent = getParentActivityIntent(); 2723 if (upIntent != null) { 2724 if (mActivityInfo.taskAffinity == null) { 2725 // Activities with a null affinity are special; they really shouldn't 2726 // specify a parent activity intent in the first place. Just finish 2727 // the current activity and call it a day. 2728 finish(); 2729 } else if (shouldUpRecreateTask(upIntent)) { 2730 TaskStackBuilder b = TaskStackBuilder.create(this); 2731 onCreateNavigateUpTaskStack(b); 2732 onPrepareNavigateUpTaskStack(b); 2733 b.startActivities(); 2734 2735 // We can't finishAffinity if we have a result. 2736 // Fall back and simply finish the current activity instead. 2737 if (mResultCode != RESULT_CANCELED || mResultData != null) { 2738 // Tell the developer what's going on to avoid hair-pulling. 2739 Log.i(TAG, "onNavigateUp only finishing topmost activity to return a result"); 2740 finish(); 2741 } else { 2742 finishAffinity(); 2743 } 2744 } else { 2745 navigateUpTo(upIntent); 2746 } 2747 return true; 2748 } 2749 return false; 2750 } 2751 2752 /** 2753 * This is called when a child activity of this one attempts to navigate up. 2754 * The default implementation simply calls onNavigateUp() on this activity (the parent). 2755 * 2756 * @param child The activity making the call. 2757 */ 2758 public boolean onNavigateUpFromChild(Activity child) { 2759 return onNavigateUp(); 2760 } 2761 2762 /** 2763 * Define the synthetic task stack that will be generated during Up navigation from 2764 * a different task. 2765 * 2766 * <p>The default implementation of this method adds the parent chain of this activity 2767 * as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications 2768 * may choose to override this method to construct the desired task stack in a different 2769 * way.</p> 2770 * 2771 * <p>This method will be invoked by the default implementation of {@link #onNavigateUp()} 2772 * if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent 2773 * returned by {@link #getParentActivityIntent()}.</p> 2774 * 2775 * <p>Applications that wish to supply extra Intent parameters to the parent stack defined 2776 * by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}.</p> 2777 * 2778 * @param builder An empty TaskStackBuilder - the application should add intents representing 2779 * the desired task stack 2780 */ 2781 public void onCreateNavigateUpTaskStack(TaskStackBuilder builder) { 2782 builder.addParentStack(this); 2783 } 2784 2785 /** 2786 * Prepare the synthetic task stack that will be generated during Up navigation 2787 * from a different task. 2788 * 2789 * <p>This method receives the {@link TaskStackBuilder} with the constructed series of 2790 * Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}. 2791 * If any extra data should be added to these intents before launching the new task, 2792 * the application should override this method and add that data here.</p> 2793 * 2794 * @param builder A TaskStackBuilder that has been populated with Intents by 2795 * onCreateNavigateUpTaskStack. 2796 */ 2797 public void onPrepareNavigateUpTaskStack(TaskStackBuilder builder) { 2798 } 2799 2800 /** 2801 * This hook is called whenever the options menu is being closed (either by the user canceling 2802 * the menu with the back/menu button, or when an item is selected). 2803 * 2804 * @param menu The options menu as last shown or first initialized by 2805 * onCreateOptionsMenu(). 2806 */ 2807 public void onOptionsMenuClosed(Menu menu) { 2808 if (mParent != null) { 2809 mParent.onOptionsMenuClosed(menu); 2810 } 2811 } 2812 2813 /** 2814 * Programmatically opens the options menu. If the options menu is already 2815 * open, this method does nothing. 2816 */ 2817 public void openOptionsMenu() { 2818 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2819 } 2820 2821 /** 2822 * Progammatically closes the options menu. If the options menu is already 2823 * closed, this method does nothing. 2824 */ 2825 public void closeOptionsMenu() { 2826 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2827 } 2828 2829 /** 2830 * Called when a context menu for the {@code view} is about to be shown. 2831 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2832 * time the context menu is about to be shown and should be populated for 2833 * the view (or item inside the view for {@link AdapterView} subclasses, 2834 * this can be found in the {@code menuInfo})). 2835 * <p> 2836 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2837 * item has been selected. 2838 * <p> 2839 * It is not safe to hold onto the context menu after this method returns. 2840 * {@inheritDoc} 2841 */ 2842 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2843 } 2844 2845 /** 2846 * Registers a context menu to be shown for the given view (multiple views 2847 * can show the context menu). This method will set the 2848 * {@link OnCreateContextMenuListener} on the view to this activity, so 2849 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2850 * called when it is time to show the context menu. 2851 * 2852 * @see #unregisterForContextMenu(View) 2853 * @param view The view that should show a context menu. 2854 */ 2855 public void registerForContextMenu(View view) { 2856 view.setOnCreateContextMenuListener(this); 2857 } 2858 2859 /** 2860 * Prevents a context menu to be shown for the given view. This method will remove the 2861 * {@link OnCreateContextMenuListener} on the view. 2862 * 2863 * @see #registerForContextMenu(View) 2864 * @param view The view that should stop showing a context menu. 2865 */ 2866 public void unregisterForContextMenu(View view) { 2867 view.setOnCreateContextMenuListener(null); 2868 } 2869 2870 /** 2871 * Programmatically opens the context menu for a particular {@code view}. 2872 * The {@code view} should have been added via 2873 * {@link #registerForContextMenu(View)}. 2874 * 2875 * @param view The view to show the context menu for. 2876 */ 2877 public void openContextMenu(View view) { 2878 view.showContextMenu(); 2879 } 2880 2881 /** 2882 * Programmatically closes the most recently opened context menu, if showing. 2883 */ 2884 public void closeContextMenu() { 2885 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2886 } 2887 2888 /** 2889 * This hook is called whenever an item in a context menu is selected. The 2890 * default implementation simply returns false to have the normal processing 2891 * happen (calling the item's Runnable or sending a message to its Handler 2892 * as appropriate). You can use this method for any items for which you 2893 * would like to do processing without those other facilities. 2894 * <p> 2895 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2896 * View that added this menu item. 2897 * <p> 2898 * Derived classes should call through to the base class for it to perform 2899 * the default menu handling. 2900 * 2901 * @param item The context menu item that was selected. 2902 * @return boolean Return false to allow normal context menu processing to 2903 * proceed, true to consume it here. 2904 */ 2905 public boolean onContextItemSelected(MenuItem item) { 2906 if (mParent != null) { 2907 return mParent.onContextItemSelected(item); 2908 } 2909 return false; 2910 } 2911 2912 /** 2913 * This hook is called whenever the context menu is being closed (either by 2914 * the user canceling the menu with the back/menu button, or when an item is 2915 * selected). 2916 * 2917 * @param menu The context menu that is being closed. 2918 */ 2919 public void onContextMenuClosed(Menu menu) { 2920 if (mParent != null) { 2921 mParent.onContextMenuClosed(menu); 2922 } 2923 } 2924 2925 /** 2926 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2927 */ 2928 @Deprecated 2929 protected Dialog onCreateDialog(int id) { 2930 return null; 2931 } 2932 2933 /** 2934 * Callback for creating dialogs that are managed (saved and restored) for you 2935 * by the activity. The default implementation calls through to 2936 * {@link #onCreateDialog(int)} for compatibility. 2937 * 2938 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2939 * or later, consider instead using a {@link DialogFragment} instead.</em> 2940 * 2941 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2942 * this method the first time, and hang onto it thereafter. Any dialog 2943 * that is created by this method will automatically be saved and restored 2944 * for you, including whether it is showing. 2945 * 2946 * <p>If you would like the activity to manage saving and restoring dialogs 2947 * for you, you should override this method and handle any ids that are 2948 * passed to {@link #showDialog}. 2949 * 2950 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2951 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2952 * 2953 * @param id The id of the dialog. 2954 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2955 * @return The dialog. If you return null, the dialog will not be created. 2956 * 2957 * @see #onPrepareDialog(int, Dialog, Bundle) 2958 * @see #showDialog(int, Bundle) 2959 * @see #dismissDialog(int) 2960 * @see #removeDialog(int) 2961 * 2962 * @deprecated Use the new {@link DialogFragment} class with 2963 * {@link FragmentManager} instead; this is also 2964 * available on older platforms through the Android compatibility package. 2965 */ 2966 @Deprecated 2967 protected Dialog onCreateDialog(int id, Bundle args) { 2968 return onCreateDialog(id); 2969 } 2970 2971 /** 2972 * @deprecated Old no-arguments version of 2973 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2974 */ 2975 @Deprecated 2976 protected void onPrepareDialog(int id, Dialog dialog) { 2977 dialog.setOwnerActivity(this); 2978 } 2979 2980 /** 2981 * Provides an opportunity to prepare a managed dialog before it is being 2982 * shown. The default implementation calls through to 2983 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2984 * 2985 * <p> 2986 * Override this if you need to update a managed dialog based on the state 2987 * of the application each time it is shown. For example, a time picker 2988 * dialog might want to be updated with the current time. You should call 2989 * through to the superclass's implementation. The default implementation 2990 * will set this Activity as the owner activity on the Dialog. 2991 * 2992 * @param id The id of the managed dialog. 2993 * @param dialog The dialog. 2994 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2995 * @see #onCreateDialog(int, Bundle) 2996 * @see #showDialog(int) 2997 * @see #dismissDialog(int) 2998 * @see #removeDialog(int) 2999 * 3000 * @deprecated Use the new {@link DialogFragment} class with 3001 * {@link FragmentManager} instead; this is also 3002 * available on older platforms through the Android compatibility package. 3003 */ 3004 @Deprecated 3005 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 3006 onPrepareDialog(id, dialog); 3007 } 3008 3009 /** 3010 * Simple version of {@link #showDialog(int, Bundle)} that does not 3011 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 3012 * with null arguments. 3013 * 3014 * @deprecated Use the new {@link DialogFragment} class with 3015 * {@link FragmentManager} instead; this is also 3016 * available on older platforms through the Android compatibility package. 3017 */ 3018 @Deprecated 3019 public final void showDialog(int id) { 3020 showDialog(id, null); 3021 } 3022 3023 /** 3024 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 3025 * will be made with the same id the first time this is called for a given 3026 * id. From thereafter, the dialog will be automatically saved and restored. 3027 * 3028 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3029 * or later, consider instead using a {@link DialogFragment} instead.</em> 3030 * 3031 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 3032 * be made to provide an opportunity to do any timely preparation. 3033 * 3034 * @param id The id of the managed dialog. 3035 * @param args Arguments to pass through to the dialog. These will be saved 3036 * and restored for you. Note that if the dialog is already created, 3037 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 3038 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 3039 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 3040 * @return Returns true if the Dialog was created; false is returned if 3041 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 3042 * 3043 * @see Dialog 3044 * @see #onCreateDialog(int, Bundle) 3045 * @see #onPrepareDialog(int, Dialog, Bundle) 3046 * @see #dismissDialog(int) 3047 * @see #removeDialog(int) 3048 * 3049 * @deprecated Use the new {@link DialogFragment} class with 3050 * {@link FragmentManager} instead; this is also 3051 * available on older platforms through the Android compatibility package. 3052 */ 3053 @Deprecated 3054 public final boolean showDialog(int id, Bundle args) { 3055 if (mManagedDialogs == null) { 3056 mManagedDialogs = new SparseArray<ManagedDialog>(); 3057 } 3058 ManagedDialog md = mManagedDialogs.get(id); 3059 if (md == null) { 3060 md = new ManagedDialog(); 3061 md.mDialog = createDialog(id, null, args); 3062 if (md.mDialog == null) { 3063 return false; 3064 } 3065 mManagedDialogs.put(id, md); 3066 } 3067 3068 md.mArgs = args; 3069 onPrepareDialog(id, md.mDialog, args); 3070 md.mDialog.show(); 3071 return true; 3072 } 3073 3074 /** 3075 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 3076 * 3077 * @param id The id of the managed dialog. 3078 * 3079 * @throws IllegalArgumentException if the id was not previously shown via 3080 * {@link #showDialog(int)}. 3081 * 3082 * @see #onCreateDialog(int, Bundle) 3083 * @see #onPrepareDialog(int, Dialog, Bundle) 3084 * @see #showDialog(int) 3085 * @see #removeDialog(int) 3086 * 3087 * @deprecated Use the new {@link DialogFragment} class with 3088 * {@link FragmentManager} instead; this is also 3089 * available on older platforms through the Android compatibility package. 3090 */ 3091 @Deprecated 3092 public final void dismissDialog(int id) { 3093 if (mManagedDialogs == null) { 3094 throw missingDialog(id); 3095 } 3096 3097 final ManagedDialog md = mManagedDialogs.get(id); 3098 if (md == null) { 3099 throw missingDialog(id); 3100 } 3101 md.mDialog.dismiss(); 3102 } 3103 3104 /** 3105 * Creates an exception to throw if a user passed in a dialog id that is 3106 * unexpected. 3107 */ 3108 private IllegalArgumentException missingDialog(int id) { 3109 return new IllegalArgumentException("no dialog with id " + id + " was ever " 3110 + "shown via Activity#showDialog"); 3111 } 3112 3113 /** 3114 * Removes any internal references to a dialog managed by this Activity. 3115 * If the dialog is showing, it will dismiss it as part of the clean up. 3116 * 3117 * <p>This can be useful if you know that you will never show a dialog again and 3118 * want to avoid the overhead of saving and restoring it in the future. 3119 * 3120 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 3121 * will not throw an exception if you try to remove an ID that does not 3122 * currently have an associated dialog.</p> 3123 * 3124 * @param id The id of the managed dialog. 3125 * 3126 * @see #onCreateDialog(int, Bundle) 3127 * @see #onPrepareDialog(int, Dialog, Bundle) 3128 * @see #showDialog(int) 3129 * @see #dismissDialog(int) 3130 * 3131 * @deprecated Use the new {@link DialogFragment} class with 3132 * {@link FragmentManager} instead; this is also 3133 * available on older platforms through the Android compatibility package. 3134 */ 3135 @Deprecated 3136 public final void removeDialog(int id) { 3137 if (mManagedDialogs != null) { 3138 final ManagedDialog md = mManagedDialogs.get(id); 3139 if (md != null) { 3140 md.mDialog.dismiss(); 3141 mManagedDialogs.remove(id); 3142 } 3143 } 3144 } 3145 3146 /** 3147 * This hook is called when the user signals the desire to start a search. 3148 * 3149 * <p>You can use this function as a simple way to launch the search UI, in response to a 3150 * menu item, search button, or other widgets within your activity. Unless overidden, 3151 * calling this function is the same as calling 3152 * {@link #startSearch startSearch(null, false, null, false)}, which launches 3153 * search for the current activity as specified in its manifest, see {@link SearchManager}. 3154 * 3155 * <p>You can override this function to force global search, e.g. in response to a dedicated 3156 * search key, or to block search entirely (by simply returning false). 3157 * 3158 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 3159 * The default implementation always returns {@code true}. 3160 * 3161 * @see android.app.SearchManager 3162 */ 3163 public boolean onSearchRequested() { 3164 startSearch(null, false, null, false); 3165 return true; 3166 } 3167 3168 /** 3169 * This hook is called to launch the search UI. 3170 * 3171 * <p>It is typically called from onSearchRequested(), either directly from 3172 * Activity.onSearchRequested() or from an overridden version in any given 3173 * Activity. If your goal is simply to activate search, it is preferred to call 3174 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 3175 * is to inject specific data such as context data, it is preferred to <i>override</i> 3176 * onSearchRequested(), so that any callers to it will benefit from the override. 3177 * 3178 * @param initialQuery Any non-null non-empty string will be inserted as 3179 * pre-entered text in the search query box. 3180 * @param selectInitialQuery If true, the intial query will be preselected, which means that 3181 * any further typing will replace it. This is useful for cases where an entire pre-formed 3182 * query is being inserted. If false, the selection point will be placed at the end of the 3183 * inserted query. This is useful when the inserted query is text that the user entered, 3184 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 3185 * if initialQuery is a non-empty string.</i> 3186 * @param appSearchData An application can insert application-specific 3187 * context here, in order to improve quality or specificity of its own 3188 * searches. This data will be returned with SEARCH intent(s). Null if 3189 * no extra data is required. 3190 * @param globalSearch If false, this will only launch the search that has been specifically 3191 * defined by the application (which is usually defined as a local search). If no default 3192 * search is defined in the current application or activity, global search will be launched. 3193 * If true, this will always launch a platform-global (e.g. web-based) search instead. 3194 * 3195 * @see android.app.SearchManager 3196 * @see #onSearchRequested 3197 */ 3198 public void startSearch(String initialQuery, boolean selectInitialQuery, 3199 Bundle appSearchData, boolean globalSearch) { 3200 ensureSearchManager(); 3201 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 3202 appSearchData, globalSearch); 3203 } 3204 3205 /** 3206 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 3207 * the search dialog. Made available for testing purposes. 3208 * 3209 * @param query The query to trigger. If empty, the request will be ignored. 3210 * @param appSearchData An application can insert application-specific 3211 * context here, in order to improve quality or specificity of its own 3212 * searches. This data will be returned with SEARCH intent(s). Null if 3213 * no extra data is required. 3214 */ 3215 public void triggerSearch(String query, Bundle appSearchData) { 3216 ensureSearchManager(); 3217 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 3218 } 3219 3220 /** 3221 * Request that key events come to this activity. Use this if your 3222 * activity has no views with focus, but the activity still wants 3223 * a chance to process key events. 3224 * 3225 * @see android.view.Window#takeKeyEvents 3226 */ 3227 public void takeKeyEvents(boolean get) { 3228 getWindow().takeKeyEvents(get); 3229 } 3230 3231 /** 3232 * Enable extended window features. This is a convenience for calling 3233 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 3234 * 3235 * @param featureId The desired feature as defined in 3236 * {@link android.view.Window}. 3237 * @return Returns true if the requested feature is supported and now 3238 * enabled. 3239 * 3240 * @see android.view.Window#requestFeature 3241 */ 3242 public final boolean requestWindowFeature(int featureId) { 3243 return getWindow().requestFeature(featureId); 3244 } 3245 3246 /** 3247 * Convenience for calling 3248 * {@link android.view.Window#setFeatureDrawableResource}. 3249 */ 3250 public final void setFeatureDrawableResource(int featureId, int resId) { 3251 getWindow().setFeatureDrawableResource(featureId, resId); 3252 } 3253 3254 /** 3255 * Convenience for calling 3256 * {@link android.view.Window#setFeatureDrawableUri}. 3257 */ 3258 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3259 getWindow().setFeatureDrawableUri(featureId, uri); 3260 } 3261 3262 /** 3263 * Convenience for calling 3264 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3265 */ 3266 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3267 getWindow().setFeatureDrawable(featureId, drawable); 3268 } 3269 3270 /** 3271 * Convenience for calling 3272 * {@link android.view.Window#setFeatureDrawableAlpha}. 3273 */ 3274 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3275 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3276 } 3277 3278 /** 3279 * Convenience for calling 3280 * {@link android.view.Window#getLayoutInflater}. 3281 */ 3282 public LayoutInflater getLayoutInflater() { 3283 return getWindow().getLayoutInflater(); 3284 } 3285 3286 /** 3287 * Returns a {@link MenuInflater} with this context. 3288 */ 3289 public MenuInflater getMenuInflater() { 3290 // Make sure that action views can get an appropriate theme. 3291 if (mMenuInflater == null) { 3292 initActionBar(); 3293 if (mActionBar != null) { 3294 mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this); 3295 } else { 3296 mMenuInflater = new MenuInflater(this); 3297 } 3298 } 3299 return mMenuInflater; 3300 } 3301 3302 @Override 3303 protected void onApplyThemeResource(Resources.Theme theme, int resid, 3304 boolean first) { 3305 if (mParent == null) { 3306 super.onApplyThemeResource(theme, resid, first); 3307 } else { 3308 try { 3309 theme.setTo(mParent.getTheme()); 3310 } catch (Exception e) { 3311 // Empty 3312 } 3313 theme.applyStyle(resid, false); 3314 } 3315 } 3316 3317 /** 3318 * Same as calling {@link #startActivityForResult(Intent, int, Bundle)} 3319 * with no options. 3320 * 3321 * @param intent The intent to start. 3322 * @param requestCode If >= 0, this code will be returned in 3323 * onActivityResult() when the activity exits. 3324 * 3325 * @throws android.content.ActivityNotFoundException 3326 * 3327 * @see #startActivity 3328 */ 3329 public void startActivityForResult(Intent intent, int requestCode) { 3330 startActivityForResult(intent, requestCode, null); 3331 } 3332 3333 /** 3334 * Launch an activity for which you would like a result when it finished. 3335 * When this activity exits, your 3336 * onActivityResult() method will be called with the given requestCode. 3337 * Using a negative requestCode is the same as calling 3338 * {@link #startActivity} (the activity is not launched as a sub-activity). 3339 * 3340 * <p>Note that this method should only be used with Intent protocols 3341 * that are defined to return a result. In other protocols (such as 3342 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 3343 * not get the result when you expect. For example, if the activity you 3344 * are launching uses the singleTask launch mode, it will not run in your 3345 * task and thus you will immediately receive a cancel result. 3346 * 3347 * <p>As a special case, if you call startActivityForResult() with a requestCode 3348 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 3349 * activity, then your window will not be displayed until a result is 3350 * returned back from the started activity. This is to avoid visible 3351 * flickering when redirecting to another activity. 3352 * 3353 * <p>This method throws {@link android.content.ActivityNotFoundException} 3354 * if there was no Activity found to run the given Intent. 3355 * 3356 * @param intent The intent to start. 3357 * @param requestCode If >= 0, this code will be returned in 3358 * onActivityResult() when the activity exits. 3359 * @param options Additional options for how the Activity should be started. 3360 * See {@link android.content.Context#startActivity(Intent, Bundle) 3361 * Context.startActivity(Intent, Bundle)} for more details. 3362 * 3363 * @throws android.content.ActivityNotFoundException 3364 * 3365 * @see #startActivity 3366 */ 3367 public void startActivityForResult(Intent intent, int requestCode, Bundle options) { 3368 if (mParent == null) { 3369 Instrumentation.ActivityResult ar = 3370 mInstrumentation.execStartActivity( 3371 this, mMainThread.getApplicationThread(), mToken, this, 3372 intent, requestCode, options); 3373 if (ar != null) { 3374 mMainThread.sendActivityResult( 3375 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 3376 ar.getResultData()); 3377 } 3378 if (requestCode >= 0) { 3379 // If this start is requesting a result, we can avoid making 3380 // the activity visible until the result is received. Setting 3381 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3382 // activity hidden during this time, to avoid flickering. 3383 // This can only be done when a result is requested because 3384 // that guarantees we will get information back when the 3385 // activity is finished, no matter what happens to it. 3386 mStartedActivity = true; 3387 } 3388 } else { 3389 if (options != null) { 3390 mParent.startActivityFromChild(this, intent, requestCode, options); 3391 } else { 3392 // Note we want to go through this method for compatibility with 3393 // existing applications that may have overridden it. 3394 mParent.startActivityFromChild(this, intent, requestCode); 3395 } 3396 } 3397 } 3398 3399 /** 3400 * @hide Implement to provide correct calling token. 3401 */ 3402 public void startActivityAsUser(Intent intent, UserHandle user) { 3403 startActivityAsUser(intent, null, user); 3404 } 3405 3406 /** 3407 * @hide Implement to provide correct calling token. 3408 */ 3409 public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) { 3410 if (mParent != null) { 3411 throw new RuntimeException("Called be called from a child"); 3412 } 3413 Instrumentation.ActivityResult ar = 3414 mInstrumentation.execStartActivity( 3415 this, mMainThread.getApplicationThread(), mToken, this, 3416 intent, -1, options, user); 3417 if (ar != null) { 3418 mMainThread.sendActivityResult( 3419 mToken, mEmbeddedID, -1, ar.getResultCode(), 3420 ar.getResultData()); 3421 } 3422 } 3423 3424 /** 3425 * Same as calling {@link #startIntentSenderForResult(IntentSender, int, 3426 * Intent, int, int, int, Bundle)} with no options. 3427 * 3428 * @param intent The IntentSender to launch. 3429 * @param requestCode If >= 0, this code will be returned in 3430 * onActivityResult() when the activity exits. 3431 * @param fillInIntent If non-null, this will be provided as the 3432 * intent parameter to {@link IntentSender#sendIntent}. 3433 * @param flagsMask Intent flags in the original IntentSender that you 3434 * would like to change. 3435 * @param flagsValues Desired values for any bits set in 3436 * <var>flagsMask</var> 3437 * @param extraFlags Always set to 0. 3438 */ 3439 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3440 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3441 throws IntentSender.SendIntentException { 3442 startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, 3443 flagsValues, extraFlags, null); 3444 } 3445 3446 /** 3447 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 3448 * to use a IntentSender to describe the activity to be started. If 3449 * the IntentSender is for an activity, that activity will be started 3450 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 3451 * here; otherwise, its associated action will be executed (such as 3452 * sending a broadcast) as if you had called 3453 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 3454 * 3455 * @param intent The IntentSender to launch. 3456 * @param requestCode If >= 0, this code will be returned in 3457 * onActivityResult() when the activity exits. 3458 * @param fillInIntent If non-null, this will be provided as the 3459 * intent parameter to {@link IntentSender#sendIntent}. 3460 * @param flagsMask Intent flags in the original IntentSender that you 3461 * would like to change. 3462 * @param flagsValues Desired values for any bits set in 3463 * <var>flagsMask</var> 3464 * @param extraFlags Always set to 0. 3465 * @param options Additional options for how the Activity should be started. 3466 * See {@link android.content.Context#startActivity(Intent, Bundle) 3467 * Context.startActivity(Intent, Bundle)} for more details. If options 3468 * have also been supplied by the IntentSender, options given here will 3469 * override any that conflict with those given by the IntentSender. 3470 */ 3471 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3472 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 3473 Bundle options) throws IntentSender.SendIntentException { 3474 if (mParent == null) { 3475 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3476 flagsMask, flagsValues, this, options); 3477 } else if (options != null) { 3478 mParent.startIntentSenderFromChild(this, intent, requestCode, 3479 fillInIntent, flagsMask, flagsValues, extraFlags, options); 3480 } else { 3481 // Note we want to go through this call for compatibility with 3482 // existing applications that may have overridden the method. 3483 mParent.startIntentSenderFromChild(this, intent, requestCode, 3484 fillInIntent, flagsMask, flagsValues, extraFlags); 3485 } 3486 } 3487 3488 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 3489 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity, 3490 Bundle options) 3491 throws IntentSender.SendIntentException { 3492 try { 3493 String resolvedType = null; 3494 if (fillInIntent != null) { 3495 fillInIntent.setAllowFds(false); 3496 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 3497 } 3498 int result = ActivityManagerNative.getDefault() 3499 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 3500 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 3501 requestCode, flagsMask, flagsValues, options); 3502 if (result == ActivityManager.START_CANCELED) { 3503 throw new IntentSender.SendIntentException(); 3504 } 3505 Instrumentation.checkStartActivityResult(result, null); 3506 } catch (RemoteException e) { 3507 } 3508 if (requestCode >= 0) { 3509 // If this start is requesting a result, we can avoid making 3510 // the activity visible until the result is received. Setting 3511 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3512 // activity hidden during this time, to avoid flickering. 3513 // This can only be done when a result is requested because 3514 // that guarantees we will get information back when the 3515 // activity is finished, no matter what happens to it. 3516 mStartedActivity = true; 3517 } 3518 } 3519 3520 /** 3521 * Same as {@link #startActivity(Intent, Bundle)} with no options 3522 * specified. 3523 * 3524 * @param intent The intent to start. 3525 * 3526 * @throws android.content.ActivityNotFoundException 3527 * 3528 * @see {@link #startActivity(Intent, Bundle)} 3529 * @see #startActivityForResult 3530 */ 3531 @Override 3532 public void startActivity(Intent intent) { 3533 startActivity(intent, null); 3534 } 3535 3536 /** 3537 * Launch a new activity. You will not receive any information about when 3538 * the activity exits. This implementation overrides the base version, 3539 * providing information about 3540 * the activity performing the launch. Because of this additional 3541 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3542 * required; if not specified, the new activity will be added to the 3543 * task of the caller. 3544 * 3545 * <p>This method throws {@link android.content.ActivityNotFoundException} 3546 * if there was no Activity found to run the given Intent. 3547 * 3548 * @param intent The intent to start. 3549 * @param options Additional options for how the Activity should be started. 3550 * See {@link android.content.Context#startActivity(Intent, Bundle) 3551 * Context.startActivity(Intent, Bundle)} for more details. 3552 * 3553 * @throws android.content.ActivityNotFoundException 3554 * 3555 * @see {@link #startActivity(Intent)} 3556 * @see #startActivityForResult 3557 */ 3558 @Override 3559 public void startActivity(Intent intent, Bundle options) { 3560 if (options != null) { 3561 startActivityForResult(intent, -1, options); 3562 } else { 3563 // Note we want to go through this call for compatibility with 3564 // applications that may have overridden the method. 3565 startActivityForResult(intent, -1); 3566 } 3567 } 3568 3569 /** 3570 * Same as {@link #startActivities(Intent[], Bundle)} with no options 3571 * specified. 3572 * 3573 * @param intents The intents to start. 3574 * 3575 * @throws android.content.ActivityNotFoundException 3576 * 3577 * @see {@link #startActivities(Intent[], Bundle)} 3578 * @see #startActivityForResult 3579 */ 3580 @Override 3581 public void startActivities(Intent[] intents) { 3582 startActivities(intents, null); 3583 } 3584 3585 /** 3586 * Launch a new activity. You will not receive any information about when 3587 * the activity exits. This implementation overrides the base version, 3588 * providing information about 3589 * the activity performing the launch. Because of this additional 3590 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3591 * required; if not specified, the new activity will be added to the 3592 * task of the caller. 3593 * 3594 * <p>This method throws {@link android.content.ActivityNotFoundException} 3595 * if there was no Activity found to run the given Intent. 3596 * 3597 * @param intents The intents to start. 3598 * @param options Additional options for how the Activity should be started. 3599 * See {@link android.content.Context#startActivity(Intent, Bundle) 3600 * Context.startActivity(Intent, Bundle)} for more details. 3601 * 3602 * @throws android.content.ActivityNotFoundException 3603 * 3604 * @see {@link #startActivities(Intent[])} 3605 * @see #startActivityForResult 3606 */ 3607 @Override 3608 public void startActivities(Intent[] intents, Bundle options) { 3609 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 3610 mToken, this, intents, options); 3611 } 3612 3613 /** 3614 * Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 3615 * with no options. 3616 * 3617 * @param intent The IntentSender to launch. 3618 * @param fillInIntent If non-null, this will be provided as the 3619 * intent parameter to {@link IntentSender#sendIntent}. 3620 * @param flagsMask Intent flags in the original IntentSender that you 3621 * would like to change. 3622 * @param flagsValues Desired values for any bits set in 3623 * <var>flagsMask</var> 3624 * @param extraFlags Always set to 0. 3625 */ 3626 public void startIntentSender(IntentSender intent, 3627 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3628 throws IntentSender.SendIntentException { 3629 startIntentSender(intent, fillInIntent, flagsMask, flagsValues, 3630 extraFlags, null); 3631 } 3632 3633 /** 3634 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 3635 * to start; see 3636 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)} 3637 * for more information. 3638 * 3639 * @param intent The IntentSender to launch. 3640 * @param fillInIntent If non-null, this will be provided as the 3641 * intent parameter to {@link IntentSender#sendIntent}. 3642 * @param flagsMask Intent flags in the original IntentSender that you 3643 * would like to change. 3644 * @param flagsValues Desired values for any bits set in 3645 * <var>flagsMask</var> 3646 * @param extraFlags Always set to 0. 3647 * @param options Additional options for how the Activity should be started. 3648 * See {@link android.content.Context#startActivity(Intent, Bundle) 3649 * Context.startActivity(Intent, Bundle)} for more details. If options 3650 * have also been supplied by the IntentSender, options given here will 3651 * override any that conflict with those given by the IntentSender. 3652 */ 3653 public void startIntentSender(IntentSender intent, 3654 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 3655 Bundle options) throws IntentSender.SendIntentException { 3656 if (options != null) { 3657 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3658 flagsValues, extraFlags, options); 3659 } else { 3660 // Note we want to go through this call for compatibility with 3661 // applications that may have overridden the method. 3662 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3663 flagsValues, extraFlags); 3664 } 3665 } 3666 3667 /** 3668 * Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)} 3669 * with no options. 3670 * 3671 * @param intent The intent to start. 3672 * @param requestCode If >= 0, this code will be returned in 3673 * onActivityResult() when the activity exits, as described in 3674 * {@link #startActivityForResult}. 3675 * 3676 * @return If a new activity was launched then true is returned; otherwise 3677 * false is returned and you must handle the Intent yourself. 3678 * 3679 * @see #startActivity 3680 * @see #startActivityForResult 3681 */ 3682 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 3683 return startActivityIfNeeded(intent, requestCode, null); 3684 } 3685 3686 /** 3687 * A special variation to launch an activity only if a new activity 3688 * instance is needed to handle the given Intent. In other words, this is 3689 * just like {@link #startActivityForResult(Intent, int)} except: if you are 3690 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 3691 * singleTask or singleTop 3692 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 3693 * and the activity 3694 * that handles <var>intent</var> is the same as your currently running 3695 * activity, then a new instance is not needed. In this case, instead of 3696 * the normal behavior of calling {@link #onNewIntent} this function will 3697 * return and you can handle the Intent yourself. 3698 * 3699 * <p>This function can only be called from a top-level activity; if it is 3700 * called from a child activity, a runtime exception will be thrown. 3701 * 3702 * @param intent The intent to start. 3703 * @param requestCode If >= 0, this code will be returned in 3704 * onActivityResult() when the activity exits, as described in 3705 * {@link #startActivityForResult}. 3706 * @param options Additional options for how the Activity should be started. 3707 * See {@link android.content.Context#startActivity(Intent, Bundle) 3708 * Context.startActivity(Intent, Bundle)} for more details. 3709 * 3710 * @return If a new activity was launched then true is returned; otherwise 3711 * false is returned and you must handle the Intent yourself. 3712 * 3713 * @see #startActivity 3714 * @see #startActivityForResult 3715 */ 3716 public boolean startActivityIfNeeded(Intent intent, int requestCode, Bundle options) { 3717 if (mParent == null) { 3718 int result = ActivityManager.START_RETURN_INTENT_TO_CALLER; 3719 try { 3720 intent.setAllowFds(false); 3721 result = ActivityManagerNative.getDefault() 3722 .startActivity(mMainThread.getApplicationThread(), 3723 intent, intent.resolveTypeIfNeeded(getContentResolver()), 3724 mToken, mEmbeddedID, requestCode, 3725 ActivityManager.START_FLAG_ONLY_IF_NEEDED, null, null, 3726 options); 3727 } catch (RemoteException e) { 3728 // Empty 3729 } 3730 3731 Instrumentation.checkStartActivityResult(result, intent); 3732 3733 if (requestCode >= 0) { 3734 // If this start is requesting a result, we can avoid making 3735 // the activity visible until the result is received. Setting 3736 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3737 // activity hidden during this time, to avoid flickering. 3738 // This can only be done when a result is requested because 3739 // that guarantees we will get information back when the 3740 // activity is finished, no matter what happens to it. 3741 mStartedActivity = true; 3742 } 3743 return result != ActivityManager.START_RETURN_INTENT_TO_CALLER; 3744 } 3745 3746 throw new UnsupportedOperationException( 3747 "startActivityIfNeeded can only be called from a top-level activity"); 3748 } 3749 3750 /** 3751 * Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with 3752 * no options. 3753 * 3754 * @param intent The intent to dispatch to the next activity. For 3755 * correct behavior, this must be the same as the Intent that started 3756 * your own activity; the only changes you can make are to the extras 3757 * inside of it. 3758 * 3759 * @return Returns a boolean indicating whether there was another Activity 3760 * to start: true if there was a next activity to start, false if there 3761 * wasn't. In general, if true is returned you will then want to call 3762 * finish() on yourself. 3763 */ 3764 public boolean startNextMatchingActivity(Intent intent) { 3765 return startNextMatchingActivity(intent, null); 3766 } 3767 3768 /** 3769 * Special version of starting an activity, for use when you are replacing 3770 * other activity components. You can use this to hand the Intent off 3771 * to the next Activity that can handle it. You typically call this in 3772 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3773 * 3774 * @param intent The intent to dispatch to the next activity. For 3775 * correct behavior, this must be the same as the Intent that started 3776 * your own activity; the only changes you can make are to the extras 3777 * inside of it. 3778 * @param options Additional options for how the Activity should be started. 3779 * See {@link android.content.Context#startActivity(Intent, Bundle) 3780 * Context.startActivity(Intent, Bundle)} for more details. 3781 * 3782 * @return Returns a boolean indicating whether there was another Activity 3783 * to start: true if there was a next activity to start, false if there 3784 * wasn't. In general, if true is returned you will then want to call 3785 * finish() on yourself. 3786 */ 3787 public boolean startNextMatchingActivity(Intent intent, Bundle options) { 3788 if (mParent == null) { 3789 try { 3790 intent.setAllowFds(false); 3791 return ActivityManagerNative.getDefault() 3792 .startNextMatchingActivity(mToken, intent, options); 3793 } catch (RemoteException e) { 3794 // Empty 3795 } 3796 return false; 3797 } 3798 3799 throw new UnsupportedOperationException( 3800 "startNextMatchingActivity can only be called from a top-level activity"); 3801 } 3802 3803 /** 3804 * Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)} 3805 * with no options. 3806 * 3807 * @param child The activity making the call. 3808 * @param intent The intent to start. 3809 * @param requestCode Reply request code. < 0 if reply is not requested. 3810 * 3811 * @throws android.content.ActivityNotFoundException 3812 * 3813 * @see #startActivity 3814 * @see #startActivityForResult 3815 */ 3816 public void startActivityFromChild(Activity child, Intent intent, 3817 int requestCode) { 3818 startActivityFromChild(child, intent, requestCode, null); 3819 } 3820 3821 /** 3822 * This is called when a child activity of this one calls its 3823 * {@link #startActivity} or {@link #startActivityForResult} method. 3824 * 3825 * <p>This method throws {@link android.content.ActivityNotFoundException} 3826 * if there was no Activity found to run the given Intent. 3827 * 3828 * @param child The activity making the call. 3829 * @param intent The intent to start. 3830 * @param requestCode Reply request code. < 0 if reply is not requested. 3831 * @param options Additional options for how the Activity should be started. 3832 * See {@link android.content.Context#startActivity(Intent, Bundle) 3833 * Context.startActivity(Intent, Bundle)} for more details. 3834 * 3835 * @throws android.content.ActivityNotFoundException 3836 * 3837 * @see #startActivity 3838 * @see #startActivityForResult 3839 */ 3840 public void startActivityFromChild(Activity child, Intent intent, 3841 int requestCode, Bundle options) { 3842 Instrumentation.ActivityResult ar = 3843 mInstrumentation.execStartActivity( 3844 this, mMainThread.getApplicationThread(), mToken, child, 3845 intent, requestCode, options); 3846 if (ar != null) { 3847 mMainThread.sendActivityResult( 3848 mToken, child.mEmbeddedID, requestCode, 3849 ar.getResultCode(), ar.getResultData()); 3850 } 3851 } 3852 3853 /** 3854 * Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)} 3855 * with no options. 3856 * 3857 * @param fragment The fragment making the call. 3858 * @param intent The intent to start. 3859 * @param requestCode Reply request code. < 0 if reply is not requested. 3860 * 3861 * @throws android.content.ActivityNotFoundException 3862 * 3863 * @see Fragment#startActivity 3864 * @see Fragment#startActivityForResult 3865 */ 3866 public void startActivityFromFragment(Fragment fragment, Intent intent, 3867 int requestCode) { 3868 startActivityFromFragment(fragment, intent, requestCode, null); 3869 } 3870 3871 /** 3872 * This is called when a Fragment in this activity calls its 3873 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 3874 * method. 3875 * 3876 * <p>This method throws {@link android.content.ActivityNotFoundException} 3877 * if there was no Activity found to run the given Intent. 3878 * 3879 * @param fragment The fragment making the call. 3880 * @param intent The intent to start. 3881 * @param requestCode Reply request code. < 0 if reply is not requested. 3882 * @param options Additional options for how the Activity should be started. 3883 * See {@link android.content.Context#startActivity(Intent, Bundle) 3884 * Context.startActivity(Intent, Bundle)} for more details. 3885 * 3886 * @throws android.content.ActivityNotFoundException 3887 * 3888 * @see Fragment#startActivity 3889 * @see Fragment#startActivityForResult 3890 */ 3891 public void startActivityFromFragment(Fragment fragment, Intent intent, 3892 int requestCode, Bundle options) { 3893 Instrumentation.ActivityResult ar = 3894 mInstrumentation.execStartActivity( 3895 this, mMainThread.getApplicationThread(), mToken, fragment, 3896 intent, requestCode, options); 3897 if (ar != null) { 3898 mMainThread.sendActivityResult( 3899 mToken, fragment.mWho, requestCode, 3900 ar.getResultCode(), ar.getResultData()); 3901 } 3902 } 3903 3904 /** 3905 * Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender, 3906 * int, Intent, int, int, int, Bundle)} with no options. 3907 */ 3908 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3909 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3910 int extraFlags) 3911 throws IntentSender.SendIntentException { 3912 startIntentSenderFromChild(child, intent, requestCode, fillInIntent, 3913 flagsMask, flagsValues, extraFlags, null); 3914 } 3915 3916 /** 3917 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3918 * taking a IntentSender; see 3919 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3920 * for more information. 3921 */ 3922 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3923 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3924 int extraFlags, Bundle options) 3925 throws IntentSender.SendIntentException { 3926 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3927 flagsMask, flagsValues, child, options); 3928 } 3929 3930 /** 3931 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3932 * or {@link #finish} to specify an explicit transition animation to 3933 * perform next. 3934 * 3935 * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative 3936 * to using this with starting activities is to supply the desired animation 3937 * information through a {@link ActivityOptions} bundle to 3938 * {@link #startActivity(Intent, Bundle) or a related function. This allows 3939 * you to specify a custom animation even when starting an activity from 3940 * outside the context of the current top activity. 3941 * 3942 * @param enterAnim A resource ID of the animation resource to use for 3943 * the incoming activity. Use 0 for no animation. 3944 * @param exitAnim A resource ID of the animation resource to use for 3945 * the outgoing activity. Use 0 for no animation. 3946 */ 3947 public void overridePendingTransition(int enterAnim, int exitAnim) { 3948 try { 3949 ActivityManagerNative.getDefault().overridePendingTransition( 3950 mToken, getPackageName(), enterAnim, exitAnim); 3951 } catch (RemoteException e) { 3952 } 3953 } 3954 3955 /** 3956 * Call this to set the result that your activity will return to its 3957 * caller. 3958 * 3959 * @param resultCode The result code to propagate back to the originating 3960 * activity, often RESULT_CANCELED or RESULT_OK 3961 * 3962 * @see #RESULT_CANCELED 3963 * @see #RESULT_OK 3964 * @see #RESULT_FIRST_USER 3965 * @see #setResult(int, Intent) 3966 */ 3967 public final void setResult(int resultCode) { 3968 synchronized (this) { 3969 mResultCode = resultCode; 3970 mResultData = null; 3971 } 3972 } 3973 3974 /** 3975 * Call this to set the result that your activity will return to its 3976 * caller. 3977 * 3978 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 3979 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 3980 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 3981 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 3982 * Activity receiving the result access to the specific URIs in the Intent. 3983 * Access will remain until the Activity has finished (it will remain across the hosting 3984 * process being killed and other temporary destruction) and will be added 3985 * to any existing set of URI permissions it already holds. 3986 * 3987 * @param resultCode The result code to propagate back to the originating 3988 * activity, often RESULT_CANCELED or RESULT_OK 3989 * @param data The data to propagate back to the originating activity. 3990 * 3991 * @see #RESULT_CANCELED 3992 * @see #RESULT_OK 3993 * @see #RESULT_FIRST_USER 3994 * @see #setResult(int) 3995 */ 3996 public final void setResult(int resultCode, Intent data) { 3997 synchronized (this) { 3998 mResultCode = resultCode; 3999 mResultData = data; 4000 } 4001 } 4002 4003 /** 4004 * Return the name of the package that invoked this activity. This is who 4005 * the data in {@link #setResult setResult()} will be sent to. You can 4006 * use this information to validate that the recipient is allowed to 4007 * receive the data. 4008 * 4009 * <p>Note: if the calling activity is not expecting a result (that is it 4010 * did not use the {@link #startActivityForResult} 4011 * form that includes a request code), then the calling package will be 4012 * null. 4013 * 4014 * @return The package of the activity that will receive your 4015 * reply, or null if none. 4016 */ 4017 public String getCallingPackage() { 4018 try { 4019 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 4020 } catch (RemoteException e) { 4021 return null; 4022 } 4023 } 4024 4025 /** 4026 * Return the name of the activity that invoked this activity. This is 4027 * who the data in {@link #setResult setResult()} will be sent to. You 4028 * can use this information to validate that the recipient is allowed to 4029 * receive the data. 4030 * 4031 * <p>Note: if the calling activity is not expecting a result (that is it 4032 * did not use the {@link #startActivityForResult} 4033 * form that includes a request code), then the calling package will be 4034 * null. 4035 * 4036 * @return String The full name of the activity that will receive your 4037 * reply, or null if none. 4038 */ 4039 public ComponentName getCallingActivity() { 4040 try { 4041 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 4042 } catch (RemoteException e) { 4043 return null; 4044 } 4045 } 4046 4047 /** 4048 * Control whether this activity's main window is visible. This is intended 4049 * only for the special case of an activity that is not going to show a 4050 * UI itself, but can't just finish prior to onResume() because it needs 4051 * to wait for a service binding or such. Setting this to false allows 4052 * you to prevent your UI from being shown during that time. 4053 * 4054 * <p>The default value for this is taken from the 4055 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 4056 */ 4057 public void setVisible(boolean visible) { 4058 if (mVisibleFromClient != visible) { 4059 mVisibleFromClient = visible; 4060 if (mVisibleFromServer) { 4061 if (visible) makeVisible(); 4062 else mDecor.setVisibility(View.INVISIBLE); 4063 } 4064 } 4065 } 4066 4067 void makeVisible() { 4068 if (!mWindowAdded) { 4069 ViewManager wm = getWindowManager(); 4070 wm.addView(mDecor, getWindow().getAttributes()); 4071 mWindowAdded = true; 4072 } 4073 mDecor.setVisibility(View.VISIBLE); 4074 } 4075 4076 /** 4077 * Check to see whether this activity is in the process of finishing, 4078 * either because you called {@link #finish} on it or someone else 4079 * has requested that it finished. This is often used in 4080 * {@link #onPause} to determine whether the activity is simply pausing or 4081 * completely finishing. 4082 * 4083 * @return If the activity is finishing, returns true; else returns false. 4084 * 4085 * @see #finish 4086 */ 4087 public boolean isFinishing() { 4088 return mFinished; 4089 } 4090 4091 /** 4092 * Check to see whether this activity is in the process of being destroyed in order to be 4093 * recreated with a new configuration. This is often used in 4094 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 4095 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 4096 * 4097 * @return If the activity is being torn down in order to be recreated with a new configuration, 4098 * returns true; else returns false. 4099 */ 4100 public boolean isChangingConfigurations() { 4101 return mChangingConfigurations; 4102 } 4103 4104 /** 4105 * Cause this Activity to be recreated with a new instance. This results 4106 * in essentially the same flow as when the Activity is created due to 4107 * a configuration change -- the current instance will go through its 4108 * lifecycle to {@link #onDestroy} and a new instance then created after it. 4109 */ 4110 public void recreate() { 4111 if (mParent != null) { 4112 throw new IllegalStateException("Can only be called on top-level activity"); 4113 } 4114 if (Looper.myLooper() != mMainThread.getLooper()) { 4115 throw new IllegalStateException("Must be called from main thread"); 4116 } 4117 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, false); 4118 } 4119 4120 /** 4121 * Call this when your activity is done and should be closed. The 4122 * ActivityResult is propagated back to whoever launched you via 4123 * onActivityResult(). 4124 */ 4125 public void finish() { 4126 if (mParent == null) { 4127 int resultCode; 4128 Intent resultData; 4129 synchronized (this) { 4130 resultCode = mResultCode; 4131 resultData = mResultData; 4132 } 4133 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 4134 try { 4135 if (resultData != null) { 4136 resultData.setAllowFds(false); 4137 } 4138 if (ActivityManagerNative.getDefault() 4139 .finishActivity(mToken, resultCode, resultData)) { 4140 mFinished = true; 4141 } 4142 } catch (RemoteException e) { 4143 // Empty 4144 } 4145 } else { 4146 mParent.finishFromChild(this); 4147 } 4148 } 4149 4150 /** 4151 * Finish this activity as well as all activities immediately below it 4152 * in the current task that have the same affinity. This is typically 4153 * used when an application can be launched on to another task (such as 4154 * from an ACTION_VIEW of a content type it understands) and the user 4155 * has used the up navigation to switch out of the current task and in 4156 * to its own task. In this case, if the user has navigated down into 4157 * any other activities of the second application, all of those should 4158 * be removed from the original task as part of the task switch. 4159 * 4160 * <p>Note that this finish does <em>not</em> allow you to deliver results 4161 * to the previous activity, and an exception will be thrown if you are trying 4162 * to do so.</p> 4163 */ 4164 public void finishAffinity() { 4165 if (mParent != null) { 4166 throw new IllegalStateException("Can not be called from an embedded activity"); 4167 } 4168 if (mResultCode != RESULT_CANCELED || mResultData != null) { 4169 throw new IllegalStateException("Can not be called to deliver a result"); 4170 } 4171 try { 4172 if (ActivityManagerNative.getDefault().finishActivityAffinity(mToken)) { 4173 mFinished = true; 4174 } 4175 } catch (RemoteException e) { 4176 // Empty 4177 } 4178 } 4179 4180 /** 4181 * This is called when a child activity of this one calls its 4182 * {@link #finish} method. The default implementation simply calls 4183 * finish() on this activity (the parent), finishing the entire group. 4184 * 4185 * @param child The activity making the call. 4186 * 4187 * @see #finish 4188 */ 4189 public void finishFromChild(Activity child) { 4190 finish(); 4191 } 4192 4193 /** 4194 * Force finish another activity that you had previously started with 4195 * {@link #startActivityForResult}. 4196 * 4197 * @param requestCode The request code of the activity that you had 4198 * given to startActivityForResult(). If there are multiple 4199 * activities started with this request code, they 4200 * will all be finished. 4201 */ 4202 public void finishActivity(int requestCode) { 4203 if (mParent == null) { 4204 try { 4205 ActivityManagerNative.getDefault() 4206 .finishSubActivity(mToken, mEmbeddedID, requestCode); 4207 } catch (RemoteException e) { 4208 // Empty 4209 } 4210 } else { 4211 mParent.finishActivityFromChild(this, requestCode); 4212 } 4213 } 4214 4215 /** 4216 * This is called when a child activity of this one calls its 4217 * finishActivity(). 4218 * 4219 * @param child The activity making the call. 4220 * @param requestCode Request code that had been used to start the 4221 * activity. 4222 */ 4223 public void finishActivityFromChild(Activity child, int requestCode) { 4224 try { 4225 ActivityManagerNative.getDefault() 4226 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 4227 } catch (RemoteException e) { 4228 // Empty 4229 } 4230 } 4231 4232 /** 4233 * Called when an activity you launched exits, giving you the requestCode 4234 * you started it with, the resultCode it returned, and any additional 4235 * data from it. The <var>resultCode</var> will be 4236 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 4237 * didn't return any result, or crashed during its operation. 4238 * 4239 * <p>You will receive this call immediately before onResume() when your 4240 * activity is re-starting. 4241 * 4242 * @param requestCode The integer request code originally supplied to 4243 * startActivityForResult(), allowing you to identify who this 4244 * result came from. 4245 * @param resultCode The integer result code returned by the child activity 4246 * through its setResult(). 4247 * @param data An Intent, which can return result data to the caller 4248 * (various data can be attached to Intent "extras"). 4249 * 4250 * @see #startActivityForResult 4251 * @see #createPendingResult 4252 * @see #setResult(int) 4253 */ 4254 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 4255 } 4256 4257 /** 4258 * Create a new PendingIntent object which you can hand to others 4259 * for them to use to send result data back to your 4260 * {@link #onActivityResult} callback. The created object will be either 4261 * one-shot (becoming invalid after a result is sent back) or multiple 4262 * (allowing any number of results to be sent through it). 4263 * 4264 * @param requestCode Private request code for the sender that will be 4265 * associated with the result data when it is returned. The sender can not 4266 * modify this value, allowing you to identify incoming results. 4267 * @param data Default data to supply in the result, which may be modified 4268 * by the sender. 4269 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 4270 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 4271 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 4272 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 4273 * or any of the flags as supported by 4274 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 4275 * of the intent that can be supplied when the actual send happens. 4276 * 4277 * @return Returns an existing or new PendingIntent matching the given 4278 * parameters. May return null only if 4279 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 4280 * supplied. 4281 * 4282 * @see PendingIntent 4283 */ 4284 public PendingIntent createPendingResult(int requestCode, Intent data, 4285 int flags) { 4286 String packageName = getPackageName(); 4287 try { 4288 data.setAllowFds(false); 4289 IIntentSender target = 4290 ActivityManagerNative.getDefault().getIntentSender( 4291 ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 4292 mParent == null ? mToken : mParent.mToken, 4293 mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null, 4294 UserHandle.myUserId()); 4295 return target != null ? new PendingIntent(target) : null; 4296 } catch (RemoteException e) { 4297 // Empty 4298 } 4299 return null; 4300 } 4301 4302 /** 4303 * Change the desired orientation of this activity. If the activity 4304 * is currently in the foreground or otherwise impacting the screen 4305 * orientation, the screen will immediately be changed (possibly causing 4306 * the activity to be restarted). Otherwise, this will be used the next 4307 * time the activity is visible. 4308 * 4309 * @param requestedOrientation An orientation constant as used in 4310 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 4311 */ 4312 public void setRequestedOrientation(int requestedOrientation) { 4313 if (mParent == null) { 4314 try { 4315 ActivityManagerNative.getDefault().setRequestedOrientation( 4316 mToken, requestedOrientation); 4317 } catch (RemoteException e) { 4318 // Empty 4319 } 4320 } else { 4321 mParent.setRequestedOrientation(requestedOrientation); 4322 } 4323 } 4324 4325 /** 4326 * Return the current requested orientation of the activity. This will 4327 * either be the orientation requested in its component's manifest, or 4328 * the last requested orientation given to 4329 * {@link #setRequestedOrientation(int)}. 4330 * 4331 * @return Returns an orientation constant as used in 4332 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 4333 */ 4334 public int getRequestedOrientation() { 4335 if (mParent == null) { 4336 try { 4337 return ActivityManagerNative.getDefault() 4338 .getRequestedOrientation(mToken); 4339 } catch (RemoteException e) { 4340 // Empty 4341 } 4342 } else { 4343 return mParent.getRequestedOrientation(); 4344 } 4345 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 4346 } 4347 4348 /** 4349 * Return the identifier of the task this activity is in. This identifier 4350 * will remain the same for the lifetime of the activity. 4351 * 4352 * @return Task identifier, an opaque integer. 4353 */ 4354 public int getTaskId() { 4355 try { 4356 return ActivityManagerNative.getDefault() 4357 .getTaskForActivity(mToken, false); 4358 } catch (RemoteException e) { 4359 return -1; 4360 } 4361 } 4362 4363 /** 4364 * Return whether this activity is the root of a task. The root is the 4365 * first activity in a task. 4366 * 4367 * @return True if this is the root activity, else false. 4368 */ 4369 public boolean isTaskRoot() { 4370 try { 4371 return ActivityManagerNative.getDefault() 4372 .getTaskForActivity(mToken, true) >= 0; 4373 } catch (RemoteException e) { 4374 return false; 4375 } 4376 } 4377 4378 /** 4379 * Move the task containing this activity to the back of the activity 4380 * stack. The activity's order within the task is unchanged. 4381 * 4382 * @param nonRoot If false then this only works if the activity is the root 4383 * of a task; if true it will work for any activity in 4384 * a task. 4385 * 4386 * @return If the task was moved (or it was already at the 4387 * back) true is returned, else false. 4388 */ 4389 public boolean moveTaskToBack(boolean nonRoot) { 4390 try { 4391 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 4392 mToken, nonRoot); 4393 } catch (RemoteException e) { 4394 // Empty 4395 } 4396 return false; 4397 } 4398 4399 /** 4400 * Returns class name for this activity with the package prefix removed. 4401 * This is the default name used to read and write settings. 4402 * 4403 * @return The local class name. 4404 */ 4405 public String getLocalClassName() { 4406 final String pkg = getPackageName(); 4407 final String cls = mComponent.getClassName(); 4408 int packageLen = pkg.length(); 4409 if (!cls.startsWith(pkg) || cls.length() <= packageLen 4410 || cls.charAt(packageLen) != '.') { 4411 return cls; 4412 } 4413 return cls.substring(packageLen+1); 4414 } 4415 4416 /** 4417 * Returns complete component name of this activity. 4418 * 4419 * @return Returns the complete component name for this activity 4420 */ 4421 public ComponentName getComponentName() 4422 { 4423 return mComponent; 4424 } 4425 4426 /** 4427 * Retrieve a {@link SharedPreferences} object for accessing preferences 4428 * that are private to this activity. This simply calls the underlying 4429 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 4430 * class name as the preferences name. 4431 * 4432 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 4433 * operation, {@link #MODE_WORLD_READABLE} and 4434 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 4435 * 4436 * @return Returns the single SharedPreferences instance that can be used 4437 * to retrieve and modify the preference values. 4438 */ 4439 public SharedPreferences getPreferences(int mode) { 4440 return getSharedPreferences(getLocalClassName(), mode); 4441 } 4442 4443 private void ensureSearchManager() { 4444 if (mSearchManager != null) { 4445 return; 4446 } 4447 4448 mSearchManager = new SearchManager(this, null); 4449 } 4450 4451 @Override 4452 public Object getSystemService(String name) { 4453 if (getBaseContext() == null) { 4454 throw new IllegalStateException( 4455 "System services not available to Activities before onCreate()"); 4456 } 4457 4458 if (WINDOW_SERVICE.equals(name)) { 4459 return mWindowManager; 4460 } else if (SEARCH_SERVICE.equals(name)) { 4461 ensureSearchManager(); 4462 return mSearchManager; 4463 } 4464 return super.getSystemService(name); 4465 } 4466 4467 /** 4468 * Change the title associated with this activity. If this is a 4469 * top-level activity, the title for its window will change. If it 4470 * is an embedded activity, the parent can do whatever it wants 4471 * with it. 4472 */ 4473 public void setTitle(CharSequence title) { 4474 mTitle = title; 4475 onTitleChanged(title, mTitleColor); 4476 4477 if (mParent != null) { 4478 mParent.onChildTitleChanged(this, title); 4479 } 4480 } 4481 4482 /** 4483 * Change the title associated with this activity. If this is a 4484 * top-level activity, the title for its window will change. If it 4485 * is an embedded activity, the parent can do whatever it wants 4486 * with it. 4487 */ 4488 public void setTitle(int titleId) { 4489 setTitle(getText(titleId)); 4490 } 4491 4492 public void setTitleColor(int textColor) { 4493 mTitleColor = textColor; 4494 onTitleChanged(mTitle, textColor); 4495 } 4496 4497 public final CharSequence getTitle() { 4498 return mTitle; 4499 } 4500 4501 public final int getTitleColor() { 4502 return mTitleColor; 4503 } 4504 4505 protected void onTitleChanged(CharSequence title, int color) { 4506 if (mTitleReady) { 4507 final Window win = getWindow(); 4508 if (win != null) { 4509 win.setTitle(title); 4510 if (color != 0) { 4511 win.setTitleColor(color); 4512 } 4513 } 4514 } 4515 } 4516 4517 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 4518 } 4519 4520 /** 4521 * Sets the visibility of the progress bar in the title. 4522 * <p> 4523 * In order for the progress bar to be shown, the feature must be requested 4524 * via {@link #requestWindowFeature(int)}. 4525 * 4526 * @param visible Whether to show the progress bars in the title. 4527 */ 4528 public final void setProgressBarVisibility(boolean visible) { 4529 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 4530 Window.PROGRESS_VISIBILITY_OFF); 4531 } 4532 4533 /** 4534 * Sets the visibility of the indeterminate progress bar in the title. 4535 * <p> 4536 * In order for the progress bar to be shown, the feature must be requested 4537 * via {@link #requestWindowFeature(int)}. 4538 * 4539 * @param visible Whether to show the progress bars in the title. 4540 */ 4541 public final void setProgressBarIndeterminateVisibility(boolean visible) { 4542 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 4543 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 4544 } 4545 4546 /** 4547 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 4548 * is always indeterminate). 4549 * <p> 4550 * In order for the progress bar to be shown, the feature must be requested 4551 * via {@link #requestWindowFeature(int)}. 4552 * 4553 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 4554 */ 4555 public final void setProgressBarIndeterminate(boolean indeterminate) { 4556 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4557 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 4558 } 4559 4560 /** 4561 * Sets the progress for the progress bars in the title. 4562 * <p> 4563 * In order for the progress bar to be shown, the feature must be requested 4564 * via {@link #requestWindowFeature(int)}. 4565 * 4566 * @param progress The progress for the progress bar. Valid ranges are from 4567 * 0 to 10000 (both inclusive). If 10000 is given, the progress 4568 * bar will be completely filled and will fade out. 4569 */ 4570 public final void setProgress(int progress) { 4571 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 4572 } 4573 4574 /** 4575 * Sets the secondary progress for the progress bar in the title. This 4576 * progress is drawn between the primary progress (set via 4577 * {@link #setProgress(int)} and the background. It can be ideal for media 4578 * scenarios such as showing the buffering progress while the default 4579 * progress shows the play progress. 4580 * <p> 4581 * In order for the progress bar to be shown, the feature must be requested 4582 * via {@link #requestWindowFeature(int)}. 4583 * 4584 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 4585 * 0 to 10000 (both inclusive). 4586 */ 4587 public final void setSecondaryProgress(int secondaryProgress) { 4588 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4589 secondaryProgress + Window.PROGRESS_SECONDARY_START); 4590 } 4591 4592 /** 4593 * Suggests an audio stream whose volume should be changed by the hardware 4594 * volume controls. 4595 * <p> 4596 * The suggested audio stream will be tied to the window of this Activity. 4597 * If the Activity is switched, the stream set here is no longer the 4598 * suggested stream. The client does not need to save and restore the old 4599 * suggested stream value in onPause and onResume. 4600 * 4601 * @param streamType The type of the audio stream whose volume should be 4602 * changed by the hardware volume controls. It is not guaranteed that 4603 * the hardware volume controls will always change this stream's 4604 * volume (for example, if a call is in progress, its stream's volume 4605 * may be changed instead). To reset back to the default, use 4606 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 4607 */ 4608 public final void setVolumeControlStream(int streamType) { 4609 getWindow().setVolumeControlStream(streamType); 4610 } 4611 4612 /** 4613 * Gets the suggested audio stream whose volume should be changed by the 4614 * harwdare volume controls. 4615 * 4616 * @return The suggested audio stream type whose volume should be changed by 4617 * the hardware volume controls. 4618 * @see #setVolumeControlStream(int) 4619 */ 4620 public final int getVolumeControlStream() { 4621 return getWindow().getVolumeControlStream(); 4622 } 4623 4624 /** 4625 * Runs the specified action on the UI thread. If the current thread is the UI 4626 * thread, then the action is executed immediately. If the current thread is 4627 * not the UI thread, the action is posted to the event queue of the UI thread. 4628 * 4629 * @param action the action to run on the UI thread 4630 */ 4631 public final void runOnUiThread(Runnable action) { 4632 if (Thread.currentThread() != mUiThread) { 4633 mHandler.post(action); 4634 } else { 4635 action.run(); 4636 } 4637 } 4638 4639 /** 4640 * Standard implementation of 4641 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 4642 * inflating with the LayoutInflater returned by {@link #getSystemService}. 4643 * This implementation does nothing and is for 4644 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 4645 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 4646 * 4647 * @see android.view.LayoutInflater#createView 4648 * @see android.view.Window#getLayoutInflater 4649 */ 4650 public View onCreateView(String name, Context context, AttributeSet attrs) { 4651 return null; 4652 } 4653 4654 /** 4655 * Standard implementation of 4656 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 4657 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 4658 * This implementation handles <fragment> tags to embed fragments inside 4659 * of the activity. 4660 * 4661 * @see android.view.LayoutInflater#createView 4662 * @see android.view.Window#getLayoutInflater 4663 */ 4664 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 4665 if (!"fragment".equals(name)) { 4666 return onCreateView(name, context, attrs); 4667 } 4668 4669 String fname = attrs.getAttributeValue(null, "class"); 4670 TypedArray a = 4671 context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Fragment); 4672 if (fname == null) { 4673 fname = a.getString(com.android.internal.R.styleable.Fragment_name); 4674 } 4675 int id = a.getResourceId(com.android.internal.R.styleable.Fragment_id, View.NO_ID); 4676 String tag = a.getString(com.android.internal.R.styleable.Fragment_tag); 4677 a.recycle(); 4678 4679 int containerId = parent != null ? parent.getId() : 0; 4680 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 4681 throw new IllegalArgumentException(attrs.getPositionDescription() 4682 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 4683 } 4684 4685 // If we restored from a previous state, we may already have 4686 // instantiated this fragment from the state and should use 4687 // that instance instead of making a new one. 4688 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 4689 if (fragment == null && tag != null) { 4690 fragment = mFragments.findFragmentByTag(tag); 4691 } 4692 if (fragment == null && containerId != View.NO_ID) { 4693 fragment = mFragments.findFragmentById(containerId); 4694 } 4695 4696 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 4697 + Integer.toHexString(id) + " fname=" + fname 4698 + " existing=" + fragment); 4699 if (fragment == null) { 4700 fragment = Fragment.instantiate(this, fname); 4701 fragment.mFromLayout = true; 4702 fragment.mFragmentId = id != 0 ? id : containerId; 4703 fragment.mContainerId = containerId; 4704 fragment.mTag = tag; 4705 fragment.mInLayout = true; 4706 fragment.mFragmentManager = mFragments; 4707 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4708 mFragments.addFragment(fragment, true); 4709 4710 } else if (fragment.mInLayout) { 4711 // A fragment already exists and it is not one we restored from 4712 // previous state. 4713 throw new IllegalArgumentException(attrs.getPositionDescription() 4714 + ": Duplicate id 0x" + Integer.toHexString(id) 4715 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 4716 + " with another fragment for " + fname); 4717 } else { 4718 // This fragment was retained from a previous instance; get it 4719 // going now. 4720 fragment.mInLayout = true; 4721 // If this fragment is newly instantiated (either right now, or 4722 // from last saved state), then give it the attributes to 4723 // initialize itself. 4724 if (!fragment.mRetaining) { 4725 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4726 } 4727 mFragments.moveToState(fragment); 4728 } 4729 4730 if (fragment.mView == null) { 4731 throw new IllegalStateException("Fragment " + fname 4732 + " did not create a view."); 4733 } 4734 if (id != 0) { 4735 fragment.mView.setId(id); 4736 } 4737 if (fragment.mView.getTag() == null) { 4738 fragment.mView.setTag(tag); 4739 } 4740 return fragment.mView; 4741 } 4742 4743 /** 4744 * Print the Activity's state into the given stream. This gets invoked if 4745 * you run "adb shell dumpsys activity <activity_component_name>". 4746 * 4747 * @param prefix Desired prefix to prepend at each line of output. 4748 * @param fd The raw file descriptor that the dump is being sent to. 4749 * @param writer The PrintWriter to which you should dump your state. This will be 4750 * closed for you after you return. 4751 * @param args additional arguments to the dump request. 4752 */ 4753 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4754 dumpInner(prefix, fd, writer, args); 4755 } 4756 4757 void dumpInner(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4758 writer.print(prefix); writer.print("Local Activity "); 4759 writer.print(Integer.toHexString(System.identityHashCode(this))); 4760 writer.println(" State:"); 4761 String innerPrefix = prefix + " "; 4762 writer.print(innerPrefix); writer.print("mResumed="); 4763 writer.print(mResumed); writer.print(" mStopped="); 4764 writer.print(mStopped); writer.print(" mFinished="); 4765 writer.println(mFinished); 4766 writer.print(innerPrefix); writer.print("mLoadersStarted="); 4767 writer.println(mLoadersStarted); 4768 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 4769 writer.println(mChangingConfigurations); 4770 writer.print(innerPrefix); writer.print("mCurrentConfig="); 4771 writer.println(mCurrentConfig); 4772 if (mLoaderManager != null) { 4773 writer.print(prefix); writer.print("Loader Manager "); 4774 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 4775 writer.println(":"); 4776 mLoaderManager.dump(prefix + " ", fd, writer, args); 4777 } 4778 mFragments.dump(prefix, fd, writer, args); 4779 writer.print(prefix); writer.println("View Hierarchy:"); 4780 dumpViewHierarchy(prefix + " ", writer, getWindow().getDecorView()); 4781 } 4782 4783 private void dumpViewHierarchy(String prefix, PrintWriter writer, View view) { 4784 writer.print(prefix); 4785 if (view == null) { 4786 writer.println("null"); 4787 return; 4788 } 4789 writer.println(view.toString()); 4790 if (!(view instanceof ViewGroup)) { 4791 return; 4792 } 4793 ViewGroup grp = (ViewGroup)view; 4794 final int N = grp.getChildCount(); 4795 if (N <= 0) { 4796 return; 4797 } 4798 prefix = prefix + " "; 4799 for (int i=0; i<N; i++) { 4800 dumpViewHierarchy(prefix, writer, grp.getChildAt(i)); 4801 } 4802 } 4803 4804 /** 4805 * Bit indicating that this activity is "immersive" and should not be 4806 * interrupted by notifications if possible. 4807 * 4808 * This value is initially set by the manifest property 4809 * <code>android:immersive</code> but may be changed at runtime by 4810 * {@link #setImmersive}. 4811 * 4812 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4813 * @hide 4814 */ 4815 public boolean isImmersive() { 4816 try { 4817 return ActivityManagerNative.getDefault().isImmersive(mToken); 4818 } catch (RemoteException e) { 4819 return false; 4820 } 4821 } 4822 4823 /** 4824 * Adjust the current immersive mode setting. 4825 * 4826 * Note that changing this value will have no effect on the activity's 4827 * {@link android.content.pm.ActivityInfo} structure; that is, if 4828 * <code>android:immersive</code> is set to <code>true</code> 4829 * in the application's manifest entry for this activity, the {@link 4830 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 4831 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4832 * FLAG_IMMERSIVE} bit set. 4833 * 4834 * @see #isImmersive 4835 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4836 * @hide 4837 */ 4838 public void setImmersive(boolean i) { 4839 try { 4840 ActivityManagerNative.getDefault().setImmersive(mToken, i); 4841 } catch (RemoteException e) { 4842 // pass 4843 } 4844 } 4845 4846 /** 4847 * Start an action mode. 4848 * 4849 * @param callback Callback that will manage lifecycle events for this context mode 4850 * @return The ContextMode that was started, or null if it was canceled 4851 * 4852 * @see ActionMode 4853 */ 4854 public ActionMode startActionMode(ActionMode.Callback callback) { 4855 return mWindow.getDecorView().startActionMode(callback); 4856 } 4857 4858 /** 4859 * Give the Activity a chance to control the UI for an action mode requested 4860 * by the system. 4861 * 4862 * <p>Note: If you are looking for a notification callback that an action mode 4863 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 4864 * 4865 * @param callback The callback that should control the new action mode 4866 * @return The new action mode, or <code>null</code> if the activity does not want to 4867 * provide special handling for this action mode. (It will be handled by the system.) 4868 */ 4869 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 4870 initActionBar(); 4871 if (mActionBar != null) { 4872 return mActionBar.startActionMode(callback); 4873 } 4874 return null; 4875 } 4876 4877 /** 4878 * Notifies the Activity that an action mode has been started. 4879 * Activity subclasses overriding this method should call the superclass implementation. 4880 * 4881 * @param mode The new action mode. 4882 */ 4883 public void onActionModeStarted(ActionMode mode) { 4884 } 4885 4886 /** 4887 * Notifies the activity that an action mode has finished. 4888 * Activity subclasses overriding this method should call the superclass implementation. 4889 * 4890 * @param mode The action mode that just finished. 4891 */ 4892 public void onActionModeFinished(ActionMode mode) { 4893 } 4894 4895 /** 4896 * Returns true if the app should recreate the task when navigating 'up' from this activity 4897 * by using targetIntent. 4898 * 4899 * <p>If this method returns false the app can trivially call 4900 * {@link #navigateUpTo(Intent)} using the same parameters to correctly perform 4901 * up navigation. If this method returns false, the app should synthesize a new task stack 4902 * by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation.</p> 4903 * 4904 * @param targetIntent An intent representing the target destination for up navigation 4905 * @return true if navigating up should recreate a new task stack, false if the same task 4906 * should be used for the destination 4907 */ 4908 public boolean shouldUpRecreateTask(Intent targetIntent) { 4909 try { 4910 PackageManager pm = getPackageManager(); 4911 ComponentName cn = targetIntent.getComponent(); 4912 if (cn == null) { 4913 cn = targetIntent.resolveActivity(pm); 4914 } 4915 ActivityInfo info = pm.getActivityInfo(cn, 0); 4916 if (info.taskAffinity == null) { 4917 return false; 4918 } 4919 return !ActivityManagerNative.getDefault() 4920 .targetTaskAffinityMatchesActivity(mToken, info.taskAffinity); 4921 } catch (RemoteException e) { 4922 return false; 4923 } catch (NameNotFoundException e) { 4924 return false; 4925 } 4926 } 4927 4928 /** 4929 * Navigate from this activity to the activity specified by upIntent, finishing this activity 4930 * in the process. If the activity indicated by upIntent already exists in the task's history, 4931 * this activity and all others before the indicated activity in the history stack will be 4932 * finished. 4933 * 4934 * <p>If the indicated activity does not appear in the history stack, this will finish 4935 * each activity in this task until the root activity of the task is reached, resulting in 4936 * an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy 4937 * when an activity may be reached by a path not passing through a canonical parent 4938 * activity.</p> 4939 * 4940 * <p>This method should be used when performing up navigation from within the same task 4941 * as the destination. If up navigation should cross tasks in some cases, see 4942 * {@link #shouldUpRecreateTask(Intent)}.</p> 4943 * 4944 * @param upIntent An intent representing the target destination for up navigation 4945 * 4946 * @return true if up navigation successfully reached the activity indicated by upIntent and 4947 * upIntent was delivered to it. false if an instance of the indicated activity could 4948 * not be found and this activity was simply finished normally. 4949 */ 4950 public boolean navigateUpTo(Intent upIntent) { 4951 if (mParent == null) { 4952 ComponentName destInfo = upIntent.getComponent(); 4953 if (destInfo == null) { 4954 destInfo = upIntent.resolveActivity(getPackageManager()); 4955 if (destInfo == null) { 4956 return false; 4957 } 4958 upIntent = new Intent(upIntent); 4959 upIntent.setComponent(destInfo); 4960 } 4961 int resultCode; 4962 Intent resultData; 4963 synchronized (this) { 4964 resultCode = mResultCode; 4965 resultData = mResultData; 4966 } 4967 if (resultData != null) { 4968 resultData.setAllowFds(false); 4969 } 4970 try { 4971 return ActivityManagerNative.getDefault().navigateUpTo(mToken, upIntent, 4972 resultCode, resultData); 4973 } catch (RemoteException e) { 4974 return false; 4975 } 4976 } else { 4977 return mParent.navigateUpToFromChild(this, upIntent); 4978 } 4979 } 4980 4981 /** 4982 * This is called when a child activity of this one calls its 4983 * {@link #navigateUpTo} method. The default implementation simply calls 4984 * navigateUpTo(upIntent) on this activity (the parent). 4985 * 4986 * @param child The activity making the call. 4987 * @param upIntent An intent representing the target destination for up navigation 4988 * 4989 * @return true if up navigation successfully reached the activity indicated by upIntent and 4990 * upIntent was delivered to it. false if an instance of the indicated activity could 4991 * not be found and this activity was simply finished normally. 4992 */ 4993 public boolean navigateUpToFromChild(Activity child, Intent upIntent) { 4994 return navigateUpTo(upIntent); 4995 } 4996 4997 /** 4998 * Obtain an {@link Intent} that will launch an explicit target activity specified by 4999 * this activity's logical parent. The logical parent is named in the application's manifest 5000 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute. 5001 * Activity subclasses may override this method to modify the Intent returned by 5002 * super.getParentActivityIntent() or to implement a different mechanism of retrieving 5003 * the parent intent entirely. 5004 * 5005 * @return a new Intent targeting the defined parent of this activity or null if 5006 * there is no valid parent. 5007 */ 5008 public Intent getParentActivityIntent() { 5009 final String parentName = mActivityInfo.parentActivityName; 5010 if (TextUtils.isEmpty(parentName)) { 5011 return null; 5012 } 5013 5014 // If the parent itself has no parent, generate a main activity intent. 5015 final ComponentName target = new ComponentName(this, parentName); 5016 try { 5017 final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0); 5018 final String parentActivity = parentInfo.parentActivityName; 5019 final Intent parentIntent = parentActivity == null 5020 ? Intent.makeMainActivity(target) 5021 : new Intent().setComponent(target); 5022 return parentIntent; 5023 } catch (NameNotFoundException e) { 5024 Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName + 5025 "' in manifest"); 5026 return null; 5027 } 5028 } 5029 5030 // ------------------ Internal API ------------------ 5031 5032 final void setParent(Activity parent) { 5033 mParent = parent; 5034 } 5035 5036 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 5037 Application application, Intent intent, ActivityInfo info, CharSequence title, 5038 Activity parent, String id, NonConfigurationInstances lastNonConfigurationInstances, 5039 Configuration config) { 5040 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 5041 lastNonConfigurationInstances, config); 5042 } 5043 5044 final void attach(Context context, ActivityThread aThread, 5045 Instrumentation instr, IBinder token, int ident, 5046 Application application, Intent intent, ActivityInfo info, 5047 CharSequence title, Activity parent, String id, 5048 NonConfigurationInstances lastNonConfigurationInstances, 5049 Configuration config) { 5050 attachBaseContext(context); 5051 5052 mFragments.attachActivity(this, mContainer, null); 5053 5054 mWindow = PolicyManager.makeNewWindow(this); 5055 mWindow.setCallback(this); 5056 mWindow.getLayoutInflater().setPrivateFactory(this); 5057 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 5058 mWindow.setSoftInputMode(info.softInputMode); 5059 } 5060 if (info.uiOptions != 0) { 5061 mWindow.setUiOptions(info.uiOptions); 5062 } 5063 mUiThread = Thread.currentThread(); 5064 5065 mMainThread = aThread; 5066 mInstrumentation = instr; 5067 mToken = token; 5068 mIdent = ident; 5069 mApplication = application; 5070 mIntent = intent; 5071 mComponent = intent.getComponent(); 5072 mActivityInfo = info; 5073 mTitle = title; 5074 mParent = parent; 5075 mEmbeddedID = id; 5076 mLastNonConfigurationInstances = lastNonConfigurationInstances; 5077 5078 mWindow.setWindowManager( 5079 (WindowManager)context.getSystemService(Context.WINDOW_SERVICE), 5080 mToken, mComponent.flattenToString(), 5081 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 5082 if (mParent != null) { 5083 mWindow.setContainer(mParent.getWindow()); 5084 } 5085 mWindowManager = mWindow.getWindowManager(); 5086 mCurrentConfig = config; 5087 } 5088 5089 /** @hide */ 5090 public final IBinder getActivityToken() { 5091 return mParent != null ? mParent.getActivityToken() : mToken; 5092 } 5093 5094 final void performCreate(Bundle icicle) { 5095 onCreate(icicle); 5096 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 5097 com.android.internal.R.styleable.Window_windowNoDisplay, false); 5098 mFragments.dispatchActivityCreated(); 5099 } 5100 5101 final void performStart() { 5102 mFragments.noteStateNotSaved(); 5103 mCalled = false; 5104 mFragments.execPendingActions(); 5105 mInstrumentation.callActivityOnStart(this); 5106 if (!mCalled) { 5107 throw new SuperNotCalledException( 5108 "Activity " + mComponent.toShortString() + 5109 " did not call through to super.onStart()"); 5110 } 5111 mFragments.dispatchStart(); 5112 if (mAllLoaderManagers != null) { 5113 LoaderManagerImpl loaders[] = new LoaderManagerImpl[mAllLoaderManagers.size()]; 5114 mAllLoaderManagers.values().toArray(loaders); 5115 if (loaders != null) { 5116 for (int i=0; i<loaders.length; i++) { 5117 LoaderManagerImpl lm = loaders[i]; 5118 lm.finishRetain(); 5119 lm.doReportStart(); 5120 } 5121 } 5122 } 5123 } 5124 5125 final void performRestart() { 5126 mFragments.noteStateNotSaved(); 5127 5128 if (mStopped) { 5129 mStopped = false; 5130 if (mToken != null && mParent == null) { 5131 WindowManagerGlobal.getInstance().setStoppedState(mToken, false); 5132 } 5133 5134 synchronized (mManagedCursors) { 5135 final int N = mManagedCursors.size(); 5136 for (int i=0; i<N; i++) { 5137 ManagedCursor mc = mManagedCursors.get(i); 5138 if (mc.mReleased || mc.mUpdated) { 5139 if (!mc.mCursor.requery()) { 5140 if (getApplicationInfo().targetSdkVersion 5141 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 5142 throw new IllegalStateException( 5143 "trying to requery an already closed cursor " 5144 + mc.mCursor); 5145 } 5146 } 5147 mc.mReleased = false; 5148 mc.mUpdated = false; 5149 } 5150 } 5151 } 5152 5153 mCalled = false; 5154 mInstrumentation.callActivityOnRestart(this); 5155 if (!mCalled) { 5156 throw new SuperNotCalledException( 5157 "Activity " + mComponent.toShortString() + 5158 " did not call through to super.onRestart()"); 5159 } 5160 performStart(); 5161 } 5162 } 5163 5164 final void performResume() { 5165 performRestart(); 5166 5167 mFragments.execPendingActions(); 5168 5169 mLastNonConfigurationInstances = null; 5170 5171 mCalled = false; 5172 // mResumed is set by the instrumentation 5173 mInstrumentation.callActivityOnResume(this); 5174 if (!mCalled) { 5175 throw new SuperNotCalledException( 5176 "Activity " + mComponent.toShortString() + 5177 " did not call through to super.onResume()"); 5178 } 5179 5180 // Now really resume, and install the current status bar and menu. 5181 mCalled = false; 5182 5183 mFragments.dispatchResume(); 5184 mFragments.execPendingActions(); 5185 5186 onPostResume(); 5187 if (!mCalled) { 5188 throw new SuperNotCalledException( 5189 "Activity " + mComponent.toShortString() + 5190 " did not call through to super.onPostResume()"); 5191 } 5192 } 5193 5194 final void performPause() { 5195 mFragments.dispatchPause(); 5196 mCalled = false; 5197 onPause(); 5198 mResumed = false; 5199 if (!mCalled && getApplicationInfo().targetSdkVersion 5200 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 5201 throw new SuperNotCalledException( 5202 "Activity " + mComponent.toShortString() + 5203 " did not call through to super.onPause()"); 5204 } 5205 mResumed = false; 5206 } 5207 5208 final void performUserLeaving() { 5209 onUserInteraction(); 5210 onUserLeaveHint(); 5211 } 5212 5213 final void performStop() { 5214 if (mLoadersStarted) { 5215 mLoadersStarted = false; 5216 if (mLoaderManager != null) { 5217 if (!mChangingConfigurations) { 5218 mLoaderManager.doStop(); 5219 } else { 5220 mLoaderManager.doRetain(); 5221 } 5222 } 5223 } 5224 5225 if (!mStopped) { 5226 if (mWindow != null) { 5227 mWindow.closeAllPanels(); 5228 } 5229 5230 if (mToken != null && mParent == null) { 5231 WindowManagerGlobal.getInstance().setStoppedState(mToken, true); 5232 } 5233 5234 mFragments.dispatchStop(); 5235 5236 mCalled = false; 5237 mInstrumentation.callActivityOnStop(this); 5238 if (!mCalled) { 5239 throw new SuperNotCalledException( 5240 "Activity " + mComponent.toShortString() + 5241 " did not call through to super.onStop()"); 5242 } 5243 5244 synchronized (mManagedCursors) { 5245 final int N = mManagedCursors.size(); 5246 for (int i=0; i<N; i++) { 5247 ManagedCursor mc = mManagedCursors.get(i); 5248 if (!mc.mReleased) { 5249 mc.mCursor.deactivate(); 5250 mc.mReleased = true; 5251 } 5252 } 5253 } 5254 5255 mStopped = true; 5256 } 5257 mResumed = false; 5258 } 5259 5260 final void performDestroy() { 5261 mWindow.destroy(); 5262 mFragments.dispatchDestroy(); 5263 onDestroy(); 5264 if (mLoaderManager != null) { 5265 mLoaderManager.doDestroy(); 5266 } 5267 } 5268 5269 /** 5270 * @hide 5271 */ 5272 public final boolean isResumed() { 5273 return mResumed; 5274 } 5275 5276 void dispatchActivityResult(String who, int requestCode, 5277 int resultCode, Intent data) { 5278 if (false) Log.v( 5279 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 5280 + ", resCode=" + resultCode + ", data=" + data); 5281 mFragments.noteStateNotSaved(); 5282 if (who == null) { 5283 onActivityResult(requestCode, resultCode, data); 5284 } else { 5285 Fragment frag = mFragments.findFragmentByWho(who); 5286 if (frag != null) { 5287 frag.onActivityResult(requestCode, resultCode, data); 5288 } 5289 } 5290 } 5291} 5292