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 private boolean mDestroyed; 689 /** true if the activity is going through a transient pause */ 690 /*package*/ boolean mTemporaryPause = false; 691 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 692 /*package*/ boolean mChangingConfigurations = false; 693 /*package*/ int mConfigChangeFlags; 694 /*package*/ Configuration mCurrentConfig; 695 private SearchManager mSearchManager; 696 private MenuInflater mMenuInflater; 697 698 static final class NonConfigurationInstances { 699 Object activity; 700 HashMap<String, Object> children; 701 ArrayList<Fragment> fragments; 702 HashMap<String, LoaderManagerImpl> loaders; 703 } 704 /* package */ NonConfigurationInstances mLastNonConfigurationInstances; 705 706 private Window mWindow; 707 708 private WindowManager mWindowManager; 709 /*package*/ View mDecor = null; 710 /*package*/ boolean mWindowAdded = false; 711 /*package*/ boolean mVisibleFromServer = false; 712 /*package*/ boolean mVisibleFromClient = true; 713 /*package*/ ActionBarImpl mActionBar = null; 714 private boolean mEnableDefaultActionBarUp; 715 716 private CharSequence mTitle; 717 private int mTitleColor = 0; 718 719 final FragmentManagerImpl mFragments = new FragmentManagerImpl(); 720 final FragmentContainer mContainer = new FragmentContainer() { 721 @Override 722 public View findViewById(int id) { 723 return Activity.this.findViewById(id); 724 } 725 }; 726 727 HashMap<String, LoaderManagerImpl> mAllLoaderManagers; 728 LoaderManagerImpl mLoaderManager; 729 730 private static final class ManagedCursor { 731 ManagedCursor(Cursor cursor) { 732 mCursor = cursor; 733 mReleased = false; 734 mUpdated = false; 735 } 736 737 private final Cursor mCursor; 738 private boolean mReleased; 739 private boolean mUpdated; 740 } 741 private final ArrayList<ManagedCursor> mManagedCursors = 742 new ArrayList<ManagedCursor>(); 743 744 // protected by synchronized (this) 745 int mResultCode = RESULT_CANCELED; 746 Intent mResultData = null; 747 748 private boolean mTitleReady = false; 749 750 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 751 private SpannableStringBuilder mDefaultKeySsb = null; 752 753 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 754 755 @SuppressWarnings("unused") 756 private final Object mInstanceTracker = StrictMode.trackActivity(this); 757 758 private Thread mUiThread; 759 final Handler mHandler = new Handler(); 760 761 /** Return the intent that started this activity. */ 762 public Intent getIntent() { 763 return mIntent; 764 } 765 766 /** 767 * Change the intent returned by {@link #getIntent}. This holds a 768 * reference to the given intent; it does not copy it. Often used in 769 * conjunction with {@link #onNewIntent}. 770 * 771 * @param newIntent The new Intent object to return from getIntent 772 * 773 * @see #getIntent 774 * @see #onNewIntent 775 */ 776 public void setIntent(Intent newIntent) { 777 mIntent = newIntent; 778 } 779 780 /** Return the application that owns this activity. */ 781 public final Application getApplication() { 782 return mApplication; 783 } 784 785 /** Is this activity embedded inside of another activity? */ 786 public final boolean isChild() { 787 return mParent != null; 788 } 789 790 /** Return the parent activity if this view is an embedded child. */ 791 public final Activity getParent() { 792 return mParent; 793 } 794 795 /** Retrieve the window manager for showing custom windows. */ 796 public WindowManager getWindowManager() { 797 return mWindowManager; 798 } 799 800 /** 801 * Retrieve the current {@link android.view.Window} for the activity. 802 * This can be used to directly access parts of the Window API that 803 * are not available through Activity/Screen. 804 * 805 * @return Window The current window, or null if the activity is not 806 * visual. 807 */ 808 public Window getWindow() { 809 return mWindow; 810 } 811 812 /** 813 * Return the LoaderManager for this fragment, creating it if needed. 814 */ 815 public LoaderManager getLoaderManager() { 816 if (mLoaderManager != null) { 817 return mLoaderManager; 818 } 819 mCheckedForLoaderManager = true; 820 mLoaderManager = getLoaderManager(null, mLoadersStarted, true); 821 return mLoaderManager; 822 } 823 824 LoaderManagerImpl getLoaderManager(String who, boolean started, boolean create) { 825 if (mAllLoaderManagers == null) { 826 mAllLoaderManagers = new HashMap<String, LoaderManagerImpl>(); 827 } 828 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 829 if (lm == null) { 830 if (create) { 831 lm = new LoaderManagerImpl(who, this, started); 832 mAllLoaderManagers.put(who, lm); 833 } 834 } else { 835 lm.updateActivity(this); 836 } 837 return lm; 838 } 839 840 /** 841 * Calls {@link android.view.Window#getCurrentFocus} on the 842 * Window of this Activity to return the currently focused view. 843 * 844 * @return View The current View with focus or null. 845 * 846 * @see #getWindow 847 * @see android.view.Window#getCurrentFocus 848 */ 849 public View getCurrentFocus() { 850 return mWindow != null ? mWindow.getCurrentFocus() : null; 851 } 852 853 /** 854 * Called when the activity is starting. This is where most initialization 855 * should go: calling {@link #setContentView(int)} to inflate the 856 * activity's UI, using {@link #findViewById} to programmatically interact 857 * with widgets in the UI, calling 858 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 859 * cursors for data being displayed, etc. 860 * 861 * <p>You can call {@link #finish} from within this function, in 862 * which case onDestroy() will be immediately called without any of the rest 863 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 864 * {@link #onPause}, etc) executing. 865 * 866 * <p><em>Derived classes must call through to the super class's 867 * implementation of this method. If they do not, an exception will be 868 * thrown.</em></p> 869 * 870 * @param savedInstanceState If the activity is being re-initialized after 871 * previously being shut down then this Bundle contains the data it most 872 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 873 * 874 * @see #onStart 875 * @see #onSaveInstanceState 876 * @see #onRestoreInstanceState 877 * @see #onPostCreate 878 */ 879 protected void onCreate(Bundle savedInstanceState) { 880 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onCreate " + this + ": " + savedInstanceState); 881 if (mLastNonConfigurationInstances != null) { 882 mAllLoaderManagers = mLastNonConfigurationInstances.loaders; 883 } 884 if (mActivityInfo.parentActivityName != null) { 885 if (mActionBar == null) { 886 mEnableDefaultActionBarUp = true; 887 } else { 888 mActionBar.setDefaultDisplayHomeAsUpEnabled(true); 889 } 890 } 891 if (savedInstanceState != null) { 892 Parcelable p = savedInstanceState.getParcelable(FRAGMENTS_TAG); 893 mFragments.restoreAllState(p, mLastNonConfigurationInstances != null 894 ? mLastNonConfigurationInstances.fragments : null); 895 } 896 mFragments.dispatchCreate(); 897 getApplication().dispatchActivityCreated(this, savedInstanceState); 898 mCalled = true; 899 } 900 901 /** 902 * The hook for {@link ActivityThread} to restore the state of this activity. 903 * 904 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 905 * {@link #restoreManagedDialogs(android.os.Bundle)}. 906 * 907 * @param savedInstanceState contains the saved state 908 */ 909 final void performRestoreInstanceState(Bundle savedInstanceState) { 910 onRestoreInstanceState(savedInstanceState); 911 restoreManagedDialogs(savedInstanceState); 912 } 913 914 /** 915 * This method is called after {@link #onStart} when the activity is 916 * being re-initialized from a previously saved state, given here in 917 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 918 * to restore their state, but it is sometimes convenient to do it here 919 * after all of the initialization has been done or to allow subclasses to 920 * decide whether to use your default implementation. The default 921 * implementation of this method performs a restore of any view state that 922 * had previously been frozen by {@link #onSaveInstanceState}. 923 * 924 * <p>This method is called between {@link #onStart} and 925 * {@link #onPostCreate}. 926 * 927 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 928 * 929 * @see #onCreate 930 * @see #onPostCreate 931 * @see #onResume 932 * @see #onSaveInstanceState 933 */ 934 protected void onRestoreInstanceState(Bundle savedInstanceState) { 935 if (mWindow != null) { 936 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 937 if (windowState != null) { 938 mWindow.restoreHierarchyState(windowState); 939 } 940 } 941 } 942 943 /** 944 * Restore the state of any saved managed dialogs. 945 * 946 * @param savedInstanceState The bundle to restore from. 947 */ 948 private void restoreManagedDialogs(Bundle savedInstanceState) { 949 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 950 if (b == null) { 951 return; 952 } 953 954 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 955 final int numDialogs = ids.length; 956 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 957 for (int i = 0; i < numDialogs; i++) { 958 final Integer dialogId = ids[i]; 959 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 960 if (dialogState != null) { 961 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 962 // so tell createDialog() not to do it, otherwise we get an exception 963 final ManagedDialog md = new ManagedDialog(); 964 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 965 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 966 if (md.mDialog != null) { 967 mManagedDialogs.put(dialogId, md); 968 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 969 md.mDialog.onRestoreInstanceState(dialogState); 970 } 971 } 972 } 973 } 974 975 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 976 final Dialog dialog = onCreateDialog(dialogId, args); 977 if (dialog == null) { 978 return null; 979 } 980 dialog.dispatchOnCreate(state); 981 return dialog; 982 } 983 984 private static String savedDialogKeyFor(int key) { 985 return SAVED_DIALOG_KEY_PREFIX + key; 986 } 987 988 private static String savedDialogArgsKeyFor(int key) { 989 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 990 } 991 992 /** 993 * Called when activity start-up is complete (after {@link #onStart} 994 * and {@link #onRestoreInstanceState} have been called). Applications will 995 * generally not implement this method; it is intended for system 996 * classes to do final initialization after application code has run. 997 * 998 * <p><em>Derived classes must call through to the super class's 999 * implementation of this method. If they do not, an exception will be 1000 * thrown.</em></p> 1001 * 1002 * @param savedInstanceState If the activity is being re-initialized after 1003 * previously being shut down then this Bundle contains the data it most 1004 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1005 * @see #onCreate 1006 */ 1007 protected void onPostCreate(Bundle savedInstanceState) { 1008 if (!isChild()) { 1009 mTitleReady = true; 1010 onTitleChanged(getTitle(), getTitleColor()); 1011 } 1012 mCalled = true; 1013 } 1014 1015 /** 1016 * Called after {@link #onCreate} — or after {@link #onRestart} when 1017 * the activity had been stopped, but is now again being displayed to the 1018 * user. It will be followed by {@link #onResume}. 1019 * 1020 * <p><em>Derived classes must call through to the super class's 1021 * implementation of this method. If they do not, an exception will be 1022 * thrown.</em></p> 1023 * 1024 * @see #onCreate 1025 * @see #onStop 1026 * @see #onResume 1027 */ 1028 protected void onStart() { 1029 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStart " + this); 1030 mCalled = true; 1031 1032 if (!mLoadersStarted) { 1033 mLoadersStarted = true; 1034 if (mLoaderManager != null) { 1035 mLoaderManager.doStart(); 1036 } else if (!mCheckedForLoaderManager) { 1037 mLoaderManager = getLoaderManager(null, mLoadersStarted, false); 1038 } 1039 mCheckedForLoaderManager = true; 1040 } 1041 1042 getApplication().dispatchActivityStarted(this); 1043 } 1044 1045 /** 1046 * Called after {@link #onStop} when the current activity is being 1047 * re-displayed to the user (the user has navigated back to it). It will 1048 * be followed by {@link #onStart} and then {@link #onResume}. 1049 * 1050 * <p>For activities that are using raw {@link Cursor} objects (instead of 1051 * creating them through 1052 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1053 * this is usually the place 1054 * where the cursor should be requeried (because you had deactivated it in 1055 * {@link #onStop}. 1056 * 1057 * <p><em>Derived classes must call through to the super class's 1058 * implementation of this method. If they do not, an exception will be 1059 * thrown.</em></p> 1060 * 1061 * @see #onStop 1062 * @see #onStart 1063 * @see #onResume 1064 */ 1065 protected void onRestart() { 1066 mCalled = true; 1067 } 1068 1069 /** 1070 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1071 * {@link #onPause}, for your activity to start interacting with the user. 1072 * This is a good place to begin animations, open exclusive-access devices 1073 * (such as the camera), etc. 1074 * 1075 * <p>Keep in mind that onResume is not the best indicator that your activity 1076 * is visible to the user; a system window such as the keyguard may be in 1077 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1078 * activity is visible to the user (for example, to resume a game). 1079 * 1080 * <p><em>Derived classes must call through to the super class's 1081 * implementation of this method. If they do not, an exception will be 1082 * thrown.</em></p> 1083 * 1084 * @see #onRestoreInstanceState 1085 * @see #onRestart 1086 * @see #onPostResume 1087 * @see #onPause 1088 */ 1089 protected void onResume() { 1090 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this); 1091 getApplication().dispatchActivityResumed(this); 1092 mCalled = true; 1093 } 1094 1095 /** 1096 * Called when activity resume is complete (after {@link #onResume} has 1097 * been called). Applications will generally not implement this method; 1098 * it is intended for system classes to do final setup after application 1099 * resume code has run. 1100 * 1101 * <p><em>Derived classes must call through to the super class's 1102 * implementation of this method. If they do not, an exception will be 1103 * thrown.</em></p> 1104 * 1105 * @see #onResume 1106 */ 1107 protected void onPostResume() { 1108 final Window win = getWindow(); 1109 if (win != null) win.makeActive(); 1110 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(true); 1111 mCalled = true; 1112 } 1113 1114 /** 1115 * This is called for activities that set launchMode to "singleTop" in 1116 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1117 * flag when calling {@link #startActivity}. In either case, when the 1118 * activity is re-launched while at the top of the activity stack instead 1119 * of a new instance of the activity being started, onNewIntent() will be 1120 * called on the existing instance with the Intent that was used to 1121 * re-launch it. 1122 * 1123 * <p>An activity will always be paused before receiving a new intent, so 1124 * you can count on {@link #onResume} being called after this method. 1125 * 1126 * <p>Note that {@link #getIntent} still returns the original Intent. You 1127 * can use {@link #setIntent} to update it to this new Intent. 1128 * 1129 * @param intent The new intent that was started for the activity. 1130 * 1131 * @see #getIntent 1132 * @see #setIntent 1133 * @see #onResume 1134 */ 1135 protected void onNewIntent(Intent intent) { 1136 } 1137 1138 /** 1139 * The hook for {@link ActivityThread} to save the state of this activity. 1140 * 1141 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1142 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1143 * 1144 * @param outState The bundle to save the state to. 1145 */ 1146 final void performSaveInstanceState(Bundle outState) { 1147 onSaveInstanceState(outState); 1148 saveManagedDialogs(outState); 1149 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onSaveInstanceState " + this + ": " + outState); 1150 } 1151 1152 /** 1153 * Called to retrieve per-instance state from an activity before being killed 1154 * so that the state can be restored in {@link #onCreate} or 1155 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1156 * will be passed to both). 1157 * 1158 * <p>This method is called before an activity may be killed so that when it 1159 * comes back some time in the future it can restore its state. For example, 1160 * if activity B is launched in front of activity A, and at some point activity 1161 * A is killed to reclaim resources, activity A will have a chance to save the 1162 * current state of its user interface via this method so that when the user 1163 * returns to activity A, the state of the user interface can be restored 1164 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1165 * 1166 * <p>Do not confuse this method with activity lifecycle callbacks such as 1167 * {@link #onPause}, which is always called when an activity is being placed 1168 * in the background or on its way to destruction, or {@link #onStop} which 1169 * is called before destruction. One example of when {@link #onPause} and 1170 * {@link #onStop} is called and not this method is when a user navigates back 1171 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1172 * on B because that particular instance will never be restored, so the 1173 * system avoids calling it. An example when {@link #onPause} is called and 1174 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1175 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1176 * killed during the lifetime of B since the state of the user interface of 1177 * A will stay intact. 1178 * 1179 * <p>The default implementation takes care of most of the UI per-instance 1180 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1181 * view in the hierarchy that has an id, and by saving the id of the currently 1182 * focused view (all of which is restored by the default implementation of 1183 * {@link #onRestoreInstanceState}). If you override this method to save additional 1184 * information not captured by each individual view, you will likely want to 1185 * call through to the default implementation, otherwise be prepared to save 1186 * all of the state of each view yourself. 1187 * 1188 * <p>If called, this method will occur before {@link #onStop}. There are 1189 * no guarantees about whether it will occur before or after {@link #onPause}. 1190 * 1191 * @param outState Bundle in which to place your saved state. 1192 * 1193 * @see #onCreate 1194 * @see #onRestoreInstanceState 1195 * @see #onPause 1196 */ 1197 protected void onSaveInstanceState(Bundle outState) { 1198 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1199 Parcelable p = mFragments.saveAllState(); 1200 if (p != null) { 1201 outState.putParcelable(FRAGMENTS_TAG, p); 1202 } 1203 getApplication().dispatchActivitySaveInstanceState(this, outState); 1204 } 1205 1206 /** 1207 * Save the state of any managed dialogs. 1208 * 1209 * @param outState place to store the saved state. 1210 */ 1211 private void saveManagedDialogs(Bundle outState) { 1212 if (mManagedDialogs == null) { 1213 return; 1214 } 1215 1216 final int numDialogs = mManagedDialogs.size(); 1217 if (numDialogs == 0) { 1218 return; 1219 } 1220 1221 Bundle dialogState = new Bundle(); 1222 1223 int[] ids = new int[mManagedDialogs.size()]; 1224 1225 // save each dialog's bundle, gather the ids 1226 for (int i = 0; i < numDialogs; i++) { 1227 final int key = mManagedDialogs.keyAt(i); 1228 ids[i] = key; 1229 final ManagedDialog md = mManagedDialogs.valueAt(i); 1230 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1231 if (md.mArgs != null) { 1232 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1233 } 1234 } 1235 1236 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1237 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1238 } 1239 1240 1241 /** 1242 * Called as part of the activity lifecycle when an activity is going into 1243 * the background, but has not (yet) been killed. The counterpart to 1244 * {@link #onResume}. 1245 * 1246 * <p>When activity B is launched in front of activity A, this callback will 1247 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1248 * so be sure to not do anything lengthy here. 1249 * 1250 * <p>This callback is mostly used for saving any persistent state the 1251 * activity is editing, to present a "edit in place" model to the user and 1252 * making sure nothing is lost if there are not enough resources to start 1253 * the new activity without first killing this one. This is also a good 1254 * place to do things like stop animations and other things that consume a 1255 * noticeable amount of CPU in order to make the switch to the next activity 1256 * as fast as possible, or to close resources that are exclusive access 1257 * such as the camera. 1258 * 1259 * <p>In situations where the system needs more memory it may kill paused 1260 * processes to reclaim resources. Because of this, you should be sure 1261 * that all of your state is saved by the time you return from 1262 * this function. In general {@link #onSaveInstanceState} is used to save 1263 * per-instance state in the activity and this method is used to store 1264 * global persistent data (in content providers, files, etc.) 1265 * 1266 * <p>After receiving this call you will usually receive a following call 1267 * to {@link #onStop} (after the next activity has been resumed and 1268 * displayed), however in some cases there will be a direct call back to 1269 * {@link #onResume} without going through the stopped state. 1270 * 1271 * <p><em>Derived classes must call through to the super class's 1272 * implementation of this method. If they do not, an exception will be 1273 * thrown.</em></p> 1274 * 1275 * @see #onResume 1276 * @see #onSaveInstanceState 1277 * @see #onStop 1278 */ 1279 protected void onPause() { 1280 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onPause " + this); 1281 getApplication().dispatchActivityPaused(this); 1282 mCalled = true; 1283 } 1284 1285 /** 1286 * Called as part of the activity lifecycle when an activity is about to go 1287 * into the background as the result of user choice. For example, when the 1288 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1289 * when an incoming phone call causes the in-call Activity to be automatically 1290 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1291 * the activity being interrupted. In cases when it is invoked, this method 1292 * is called right before the activity's {@link #onPause} callback. 1293 * 1294 * <p>This callback and {@link #onUserInteraction} are intended to help 1295 * activities manage status bar notifications intelligently; specifically, 1296 * for helping activities determine the proper time to cancel a notfication. 1297 * 1298 * @see #onUserInteraction() 1299 */ 1300 protected void onUserLeaveHint() { 1301 } 1302 1303 /** 1304 * Generate a new thumbnail for this activity. This method is called before 1305 * pausing the activity, and should draw into <var>outBitmap</var> the 1306 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1307 * can use the given <var>canvas</var>, which is configured to draw into the 1308 * bitmap, for rendering if desired. 1309 * 1310 * <p>The default implementation returns fails and does not draw a thumbnail; 1311 * this will result in the platform creating its own thumbnail if needed. 1312 * 1313 * @param outBitmap The bitmap to contain the thumbnail. 1314 * @param canvas Can be used to render into the bitmap. 1315 * 1316 * @return Return true if you have drawn into the bitmap; otherwise after 1317 * you return it will be filled with a default thumbnail. 1318 * 1319 * @see #onCreateDescription 1320 * @see #onSaveInstanceState 1321 * @see #onPause 1322 */ 1323 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1324 return false; 1325 } 1326 1327 /** 1328 * Generate a new description for this activity. This method is called 1329 * before pausing the activity and can, if desired, return some textual 1330 * description of its current state to be displayed to the user. 1331 * 1332 * <p>The default implementation returns null, which will cause you to 1333 * inherit the description from the previous activity. If all activities 1334 * return null, generally the label of the top activity will be used as the 1335 * description. 1336 * 1337 * @return A description of what the user is doing. It should be short and 1338 * sweet (only a few words). 1339 * 1340 * @see #onCreateThumbnail 1341 * @see #onSaveInstanceState 1342 * @see #onPause 1343 */ 1344 public CharSequence onCreateDescription() { 1345 return null; 1346 } 1347 1348 /** 1349 * Called when you are no longer visible to the user. You will next 1350 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1351 * depending on later user activity. 1352 * 1353 * <p>Note that this method may never be called, in low memory situations 1354 * where the system does not have enough memory to keep your activity's 1355 * process running after its {@link #onPause} method is called. 1356 * 1357 * <p><em>Derived classes must call through to the super class's 1358 * implementation of this method. If they do not, an exception will be 1359 * thrown.</em></p> 1360 * 1361 * @see #onRestart 1362 * @see #onResume 1363 * @see #onSaveInstanceState 1364 * @see #onDestroy 1365 */ 1366 protected void onStop() { 1367 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onStop " + this); 1368 if (mActionBar != null) mActionBar.setShowHideAnimationEnabled(false); 1369 getApplication().dispatchActivityStopped(this); 1370 mCalled = true; 1371 } 1372 1373 /** 1374 * Perform any final cleanup before an activity is destroyed. This can 1375 * happen either because the activity is finishing (someone called 1376 * {@link #finish} on it, or because the system is temporarily destroying 1377 * this instance of the activity to save space. You can distinguish 1378 * between these two scenarios with the {@link #isFinishing} method. 1379 * 1380 * <p><em>Note: do not count on this method being called as a place for 1381 * saving data! For example, if an activity is editing data in a content 1382 * provider, those edits should be committed in either {@link #onPause} or 1383 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1384 * free resources like threads that are associated with an activity, so 1385 * that a destroyed activity does not leave such things around while the 1386 * rest of its application is still running. There are situations where 1387 * the system will simply kill the activity's hosting process without 1388 * calling this method (or any others) in it, so it should not be used to 1389 * do things that are intended to remain around after the process goes 1390 * away. 1391 * 1392 * <p><em>Derived classes must call through to the super class's 1393 * implementation of this method. If they do not, an exception will be 1394 * thrown.</em></p> 1395 * 1396 * @see #onPause 1397 * @see #onStop 1398 * @see #finish 1399 * @see #isFinishing 1400 */ 1401 protected void onDestroy() { 1402 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onDestroy " + this); 1403 mCalled = true; 1404 1405 // dismiss any dialogs we are managing. 1406 if (mManagedDialogs != null) { 1407 final int numDialogs = mManagedDialogs.size(); 1408 for (int i = 0; i < numDialogs; i++) { 1409 final ManagedDialog md = mManagedDialogs.valueAt(i); 1410 if (md.mDialog.isShowing()) { 1411 md.mDialog.dismiss(); 1412 } 1413 } 1414 mManagedDialogs = null; 1415 } 1416 1417 // close any cursors we are managing. 1418 synchronized (mManagedCursors) { 1419 int numCursors = mManagedCursors.size(); 1420 for (int i = 0; i < numCursors; i++) { 1421 ManagedCursor c = mManagedCursors.get(i); 1422 if (c != null) { 1423 c.mCursor.close(); 1424 } 1425 } 1426 mManagedCursors.clear(); 1427 } 1428 1429 // Close any open search dialog 1430 if (mSearchManager != null) { 1431 mSearchManager.stopSearch(); 1432 } 1433 1434 getApplication().dispatchActivityDestroyed(this); 1435 } 1436 1437 /** 1438 * Called by the system when the device configuration changes while your 1439 * activity is running. Note that this will <em>only</em> be called if 1440 * you have selected configurations you would like to handle with the 1441 * {@link android.R.attr#configChanges} attribute in your manifest. If 1442 * any configuration change occurs that is not selected to be reported 1443 * by that attribute, then instead of reporting it the system will stop 1444 * and restart the activity (to have it launched with the new 1445 * configuration). 1446 * 1447 * <p>At the time that this function has been called, your Resources 1448 * object will have been updated to return resource values matching the 1449 * new configuration. 1450 * 1451 * @param newConfig The new device configuration. 1452 */ 1453 public void onConfigurationChanged(Configuration newConfig) { 1454 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onConfigurationChanged " + this + ": " + newConfig); 1455 mCalled = true; 1456 1457 mFragments.dispatchConfigurationChanged(newConfig); 1458 1459 if (mWindow != null) { 1460 // Pass the configuration changed event to the window 1461 mWindow.onConfigurationChanged(newConfig); 1462 } 1463 1464 if (mActionBar != null) { 1465 // Do this last; the action bar will need to access 1466 // view changes from above. 1467 mActionBar.onConfigurationChanged(newConfig); 1468 } 1469 } 1470 1471 /** 1472 * If this activity is being destroyed because it can not handle a 1473 * configuration parameter being changed (and thus its 1474 * {@link #onConfigurationChanged(Configuration)} method is 1475 * <em>not</em> being called), then you can use this method to discover 1476 * the set of changes that have occurred while in the process of being 1477 * destroyed. Note that there is no guarantee that these will be 1478 * accurate (other changes could have happened at any time), so you should 1479 * only use this as an optimization hint. 1480 * 1481 * @return Returns a bit field of the configuration parameters that are 1482 * changing, as defined by the {@link android.content.res.Configuration} 1483 * class. 1484 */ 1485 public int getChangingConfigurations() { 1486 return mConfigChangeFlags; 1487 } 1488 1489 /** 1490 * Retrieve the non-configuration instance data that was previously 1491 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1492 * be available from the initial {@link #onCreate} and 1493 * {@link #onStart} calls to the new instance, allowing you to extract 1494 * any useful dynamic state from the previous instance. 1495 * 1496 * <p>Note that the data you retrieve here should <em>only</em> be used 1497 * as an optimization for handling configuration changes. You should always 1498 * be able to handle getting a null pointer back, and an activity must 1499 * still be able to restore itself to its previous state (through the 1500 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1501 * function returns null. 1502 * 1503 * @return Returns the object previously returned by 1504 * {@link #onRetainNonConfigurationInstance()}. 1505 * 1506 * @deprecated Use the new {@link Fragment} API 1507 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1508 * available on older platforms through the Android compatibility package. 1509 */ 1510 @Deprecated 1511 public Object getLastNonConfigurationInstance() { 1512 return mLastNonConfigurationInstances != null 1513 ? mLastNonConfigurationInstances.activity : null; 1514 } 1515 1516 /** 1517 * Called by the system, as part of destroying an 1518 * activity due to a configuration change, when it is known that a new 1519 * instance will immediately be created for the new configuration. You 1520 * can return any object you like here, including the activity instance 1521 * itself, which can later be retrieved by calling 1522 * {@link #getLastNonConfigurationInstance()} in the new activity 1523 * instance. 1524 * 1525 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1526 * or later, consider instead using a {@link Fragment} with 1527 * {@link Fragment#setRetainInstance(boolean) 1528 * Fragment.setRetainInstance(boolean}.</em> 1529 * 1530 * <p>This function is called purely as an optimization, and you must 1531 * not rely on it being called. When it is called, a number of guarantees 1532 * will be made to help optimize configuration switching: 1533 * <ul> 1534 * <li> The function will be called between {@link #onStop} and 1535 * {@link #onDestroy}. 1536 * <li> A new instance of the activity will <em>always</em> be immediately 1537 * created after this one's {@link #onDestroy()} is called. In particular, 1538 * <em>no</em> messages will be dispatched during this time (when the returned 1539 * object does not have an activity to be associated with). 1540 * <li> The object you return here will <em>always</em> be available from 1541 * the {@link #getLastNonConfigurationInstance()} method of the following 1542 * activity instance as described there. 1543 * </ul> 1544 * 1545 * <p>These guarantees are designed so that an activity can use this API 1546 * to propagate extensive state from the old to new activity instance, from 1547 * loaded bitmaps, to network connections, to evenly actively running 1548 * threads. Note that you should <em>not</em> propagate any data that 1549 * may change based on the configuration, including any data loaded from 1550 * resources such as strings, layouts, or drawables. 1551 * 1552 * <p>The guarantee of no message handling during the switch to the next 1553 * activity simplifies use with active objects. For example if your retained 1554 * state is an {@link android.os.AsyncTask} you are guaranteed that its 1555 * call back functions (like {@link android.os.AsyncTask#onPostExecute}) will 1556 * not be called from the call here until you execute the next instance's 1557 * {@link #onCreate(Bundle)}. (Note however that there is of course no such 1558 * guarantee for {@link android.os.AsyncTask#doInBackground} since that is 1559 * running in a separate thread.) 1560 * 1561 * @return Return any Object holding the desired state to propagate to the 1562 * next activity instance. 1563 * 1564 * @deprecated Use the new {@link Fragment} API 1565 * {@link Fragment#setRetainInstance(boolean)} instead; this is also 1566 * available on older platforms through the Android compatibility package. 1567 */ 1568 public Object onRetainNonConfigurationInstance() { 1569 return null; 1570 } 1571 1572 /** 1573 * Retrieve the non-configuration instance data that was previously 1574 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1575 * be available from the initial {@link #onCreate} and 1576 * {@link #onStart} calls to the new instance, allowing you to extract 1577 * any useful dynamic state from the previous instance. 1578 * 1579 * <p>Note that the data you retrieve here should <em>only</em> be used 1580 * as an optimization for handling configuration changes. You should always 1581 * be able to handle getting a null pointer back, and an activity must 1582 * still be able to restore itself to its previous state (through the 1583 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1584 * function returns null. 1585 * 1586 * @return Returns the object previously returned by 1587 * {@link #onRetainNonConfigurationChildInstances()} 1588 */ 1589 HashMap<String, Object> getLastNonConfigurationChildInstances() { 1590 return mLastNonConfigurationInstances != null 1591 ? mLastNonConfigurationInstances.children : null; 1592 } 1593 1594 /** 1595 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1596 * it should return either a mapping from child activity id strings to arbitrary objects, 1597 * or null. This method is intended to be used by Activity framework subclasses that control a 1598 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1599 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1600 */ 1601 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1602 return null; 1603 } 1604 1605 NonConfigurationInstances retainNonConfigurationInstances() { 1606 Object activity = onRetainNonConfigurationInstance(); 1607 HashMap<String, Object> children = onRetainNonConfigurationChildInstances(); 1608 ArrayList<Fragment> fragments = mFragments.retainNonConfig(); 1609 boolean retainLoaders = false; 1610 if (mAllLoaderManagers != null) { 1611 // prune out any loader managers that were already stopped and so 1612 // have nothing useful to retain. 1613 LoaderManagerImpl loaders[] = new LoaderManagerImpl[mAllLoaderManagers.size()]; 1614 mAllLoaderManagers.values().toArray(loaders); 1615 if (loaders != null) { 1616 for (int i=0; i<loaders.length; i++) { 1617 LoaderManagerImpl lm = loaders[i]; 1618 if (lm.mRetaining) { 1619 retainLoaders = true; 1620 } else { 1621 lm.doDestroy(); 1622 mAllLoaderManagers.remove(lm.mWho); 1623 } 1624 } 1625 } 1626 } 1627 if (activity == null && children == null && fragments == null && !retainLoaders) { 1628 return null; 1629 } 1630 1631 NonConfigurationInstances nci = new NonConfigurationInstances(); 1632 nci.activity = activity; 1633 nci.children = children; 1634 nci.fragments = fragments; 1635 nci.loaders = mAllLoaderManagers; 1636 return nci; 1637 } 1638 1639 public void onLowMemory() { 1640 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onLowMemory " + this); 1641 mCalled = true; 1642 mFragments.dispatchLowMemory(); 1643 } 1644 1645 public void onTrimMemory(int level) { 1646 if (DEBUG_LIFECYCLE) Slog.v(TAG, "onTrimMemory " + this + ": " + level); 1647 mCalled = true; 1648 mFragments.dispatchTrimMemory(level); 1649 } 1650 1651 /** 1652 * Return the FragmentManager for interacting with fragments associated 1653 * with this activity. 1654 */ 1655 public FragmentManager getFragmentManager() { 1656 return mFragments; 1657 } 1658 1659 void invalidateFragment(String who) { 1660 //Log.v(TAG, "invalidateFragmentIndex: index=" + index); 1661 if (mAllLoaderManagers != null) { 1662 LoaderManagerImpl lm = mAllLoaderManagers.get(who); 1663 if (lm != null && !lm.mRetaining) { 1664 lm.doDestroy(); 1665 mAllLoaderManagers.remove(who); 1666 } 1667 } 1668 } 1669 1670 /** 1671 * Called when a Fragment is being attached to this activity, immediately 1672 * after the call to its {@link Fragment#onAttach Fragment.onAttach()} 1673 * method and before {@link Fragment#onCreate Fragment.onCreate()}. 1674 */ 1675 public void onAttachFragment(Fragment fragment) { 1676 } 1677 1678 /** 1679 * Wrapper around 1680 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1681 * that gives the resulting {@link Cursor} to call 1682 * {@link #startManagingCursor} so that the activity will manage its 1683 * lifecycle for you. 1684 * 1685 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1686 * or later, consider instead using {@link LoaderManager} instead, available 1687 * via {@link #getLoaderManager()}.</em> 1688 * 1689 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1690 * this method, because the activity will do that for you at the appropriate time. However, if 1691 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1692 * not</em> automatically close the cursor and, in that case, you must call 1693 * {@link Cursor#close()}.</p> 1694 * 1695 * @param uri The URI of the content provider to query. 1696 * @param projection List of columns to return. 1697 * @param selection SQL WHERE clause. 1698 * @param sortOrder SQL ORDER BY clause. 1699 * 1700 * @return The Cursor that was returned by query(). 1701 * 1702 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1703 * @see #startManagingCursor 1704 * @hide 1705 * 1706 * @deprecated Use {@link CursorLoader} instead. 1707 */ 1708 @Deprecated 1709 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1710 String sortOrder) { 1711 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1712 if (c != null) { 1713 startManagingCursor(c); 1714 } 1715 return c; 1716 } 1717 1718 /** 1719 * Wrapper around 1720 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1721 * that gives the resulting {@link Cursor} to call 1722 * {@link #startManagingCursor} so that the activity will manage its 1723 * lifecycle for you. 1724 * 1725 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1726 * or later, consider instead using {@link LoaderManager} instead, available 1727 * via {@link #getLoaderManager()}.</em> 1728 * 1729 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on a cursor obtained using 1730 * this method, because the activity will do that for you at the appropriate time. However, if 1731 * you call {@link #stopManagingCursor} on a cursor from a managed query, the system <em>will 1732 * not</em> automatically close the cursor and, in that case, you must call 1733 * {@link Cursor#close()}.</p> 1734 * 1735 * @param uri The URI of the content provider to query. 1736 * @param projection List of columns to return. 1737 * @param selection SQL WHERE clause. 1738 * @param selectionArgs The arguments to selection, if any ?s are pesent 1739 * @param sortOrder SQL ORDER BY clause. 1740 * 1741 * @return The Cursor that was returned by query(). 1742 * 1743 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1744 * @see #startManagingCursor 1745 * 1746 * @deprecated Use {@link CursorLoader} instead. 1747 */ 1748 @Deprecated 1749 public final Cursor managedQuery(Uri uri, String[] projection, String selection, 1750 String[] selectionArgs, String sortOrder) { 1751 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1752 if (c != null) { 1753 startManagingCursor(c); 1754 } 1755 return c; 1756 } 1757 1758 /** 1759 * This method allows the activity to take care of managing the given 1760 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1761 * That is, when the activity is stopped it will automatically call 1762 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1763 * it will call {@link Cursor#requery} for you. When the activity is 1764 * destroyed, all managed Cursors will be closed automatically. 1765 * 1766 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 1767 * or later, consider instead using {@link LoaderManager} instead, available 1768 * via {@link #getLoaderManager()}.</em> 1769 * 1770 * <p><strong>Warning:</strong> Do not call {@link Cursor#close()} on cursor obtained from 1771 * {@link #managedQuery}, because the activity will do that for you at the appropriate time. 1772 * However, if you call {@link #stopManagingCursor} on a cursor from a managed query, the system 1773 * <em>will not</em> automatically close the cursor and, in that case, you must call 1774 * {@link Cursor#close()}.</p> 1775 * 1776 * @param c The Cursor to be managed. 1777 * 1778 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1779 * @see #stopManagingCursor 1780 * 1781 * @deprecated Use the new {@link android.content.CursorLoader} class with 1782 * {@link LoaderManager} instead; this is also 1783 * available on older platforms through the Android compatibility package. 1784 */ 1785 @Deprecated 1786 public void startManagingCursor(Cursor c) { 1787 synchronized (mManagedCursors) { 1788 mManagedCursors.add(new ManagedCursor(c)); 1789 } 1790 } 1791 1792 /** 1793 * Given a Cursor that was previously given to 1794 * {@link #startManagingCursor}, stop the activity's management of that 1795 * cursor. 1796 * 1797 * <p><strong>Warning:</strong> After calling this method on a cursor from a managed query, 1798 * the system <em>will not</em> automatically close the cursor and you must call 1799 * {@link Cursor#close()}.</p> 1800 * 1801 * @param c The Cursor that was being managed. 1802 * 1803 * @see #startManagingCursor 1804 * 1805 * @deprecated Use the new {@link android.content.CursorLoader} class with 1806 * {@link LoaderManager} instead; this is also 1807 * available on older platforms through the Android compatibility package. 1808 */ 1809 @Deprecated 1810 public void stopManagingCursor(Cursor c) { 1811 synchronized (mManagedCursors) { 1812 final int N = mManagedCursors.size(); 1813 for (int i=0; i<N; i++) { 1814 ManagedCursor mc = mManagedCursors.get(i); 1815 if (mc.mCursor == c) { 1816 mManagedCursors.remove(i); 1817 break; 1818 } 1819 } 1820 } 1821 } 1822 1823 /** 1824 * @deprecated As of {@link android.os.Build.VERSION_CODES#GINGERBREAD} 1825 * this is a no-op. 1826 * @hide 1827 */ 1828 @Deprecated 1829 public void setPersistent(boolean isPersistent) { 1830 } 1831 1832 /** 1833 * Finds a view that was identified by the id attribute from the XML that 1834 * was processed in {@link #onCreate}. 1835 * 1836 * @return The view if found or null otherwise. 1837 */ 1838 public View findViewById(int id) { 1839 return getWindow().findViewById(id); 1840 } 1841 1842 /** 1843 * Retrieve a reference to this activity's ActionBar. 1844 * 1845 * @return The Activity's ActionBar, or null if it does not have one. 1846 */ 1847 public ActionBar getActionBar() { 1848 initActionBar(); 1849 return mActionBar; 1850 } 1851 1852 /** 1853 * Creates a new ActionBar, locates the inflated ActionBarView, 1854 * initializes the ActionBar with the view, and sets mActionBar. 1855 */ 1856 private void initActionBar() { 1857 Window window = getWindow(); 1858 1859 // Initializing the window decor can change window feature flags. 1860 // Make sure that we have the correct set before performing the test below. 1861 window.getDecorView(); 1862 1863 if (isChild() || !window.hasFeature(Window.FEATURE_ACTION_BAR) || mActionBar != null) { 1864 return; 1865 } 1866 1867 mActionBar = new ActionBarImpl(this); 1868 mActionBar.setDefaultDisplayHomeAsUpEnabled(mEnableDefaultActionBarUp); 1869 } 1870 1871 /** 1872 * Set the activity content from a layout resource. The resource will be 1873 * inflated, adding all top-level views to the activity. 1874 * 1875 * @param layoutResID Resource ID to be inflated. 1876 * 1877 * @see #setContentView(android.view.View) 1878 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1879 */ 1880 public void setContentView(int layoutResID) { 1881 getWindow().setContentView(layoutResID); 1882 initActionBar(); 1883 } 1884 1885 /** 1886 * Set the activity content to an explicit view. This view is placed 1887 * directly into the activity's view hierarchy. It can itself be a complex 1888 * view hierarchy. When calling this method, the layout parameters of the 1889 * specified view are ignored. Both the width and the height of the view are 1890 * set by default to {@link ViewGroup.LayoutParams#MATCH_PARENT}. To use 1891 * your own layout parameters, invoke 1892 * {@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)} 1893 * instead. 1894 * 1895 * @param view The desired content to display. 1896 * 1897 * @see #setContentView(int) 1898 * @see #setContentView(android.view.View, android.view.ViewGroup.LayoutParams) 1899 */ 1900 public void setContentView(View view) { 1901 getWindow().setContentView(view); 1902 initActionBar(); 1903 } 1904 1905 /** 1906 * Set the activity content to an explicit view. This view is placed 1907 * directly into the activity's view hierarchy. It can itself be a complex 1908 * view hierarchy. 1909 * 1910 * @param view The desired content to display. 1911 * @param params Layout parameters for the view. 1912 * 1913 * @see #setContentView(android.view.View) 1914 * @see #setContentView(int) 1915 */ 1916 public void setContentView(View view, ViewGroup.LayoutParams params) { 1917 getWindow().setContentView(view, params); 1918 initActionBar(); 1919 } 1920 1921 /** 1922 * Add an additional content view to the activity. Added after any existing 1923 * ones in the activity -- existing views are NOT removed. 1924 * 1925 * @param view The desired content to display. 1926 * @param params Layout parameters for the view. 1927 */ 1928 public void addContentView(View view, ViewGroup.LayoutParams params) { 1929 getWindow().addContentView(view, params); 1930 initActionBar(); 1931 } 1932 1933 /** 1934 * Sets whether this activity is finished when touched outside its window's 1935 * bounds. 1936 */ 1937 public void setFinishOnTouchOutside(boolean finish) { 1938 mWindow.setCloseOnTouchOutside(finish); 1939 } 1940 1941 /** 1942 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1943 * keys. 1944 * 1945 * @see #setDefaultKeyMode 1946 */ 1947 static public final int DEFAULT_KEYS_DISABLE = 0; 1948 /** 1949 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1950 * key handling. 1951 * 1952 * @see #setDefaultKeyMode 1953 */ 1954 static public final int DEFAULT_KEYS_DIALER = 1; 1955 /** 1956 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1957 * default key handling. 1958 * 1959 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1960 * 1961 * @see #setDefaultKeyMode 1962 */ 1963 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1964 /** 1965 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1966 * will start an application-defined search. (If the application or activity does not 1967 * actually define a search, the the keys will be ignored.) 1968 * 1969 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1970 * 1971 * @see #setDefaultKeyMode 1972 */ 1973 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1974 1975 /** 1976 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1977 * will start a global search (typically web search, but some platforms may define alternate 1978 * methods for global search) 1979 * 1980 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1981 * 1982 * @see #setDefaultKeyMode 1983 */ 1984 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1985 1986 /** 1987 * Select the default key handling for this activity. This controls what 1988 * will happen to key events that are not otherwise handled. The default 1989 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1990 * floor. Other modes allow you to launch the dialer 1991 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1992 * menu without requiring the menu key be held down 1993 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1994 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1995 * 1996 * <p>Note that the mode selected here does not impact the default 1997 * handling of system keys, such as the "back" and "menu" keys, and your 1998 * activity and its views always get a first chance to receive and handle 1999 * all application keys. 2000 * 2001 * @param mode The desired default key mode constant. 2002 * 2003 * @see #DEFAULT_KEYS_DISABLE 2004 * @see #DEFAULT_KEYS_DIALER 2005 * @see #DEFAULT_KEYS_SHORTCUT 2006 * @see #DEFAULT_KEYS_SEARCH_LOCAL 2007 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 2008 * @see #onKeyDown 2009 */ 2010 public final void setDefaultKeyMode(int mode) { 2011 mDefaultKeyMode = mode; 2012 2013 // Some modes use a SpannableStringBuilder to track & dispatch input events 2014 // This list must remain in sync with the switch in onKeyDown() 2015 switch (mode) { 2016 case DEFAULT_KEYS_DISABLE: 2017 case DEFAULT_KEYS_SHORTCUT: 2018 mDefaultKeySsb = null; // not used in these modes 2019 break; 2020 case DEFAULT_KEYS_DIALER: 2021 case DEFAULT_KEYS_SEARCH_LOCAL: 2022 case DEFAULT_KEYS_SEARCH_GLOBAL: 2023 mDefaultKeySsb = new SpannableStringBuilder(); 2024 Selection.setSelection(mDefaultKeySsb,0); 2025 break; 2026 default: 2027 throw new IllegalArgumentException(); 2028 } 2029 } 2030 2031 /** 2032 * Called when a key was pressed down and not handled by any of the views 2033 * inside of the activity. So, for example, key presses while the cursor 2034 * is inside a TextView will not trigger the event (unless it is a navigation 2035 * to another object) because TextView handles its own key presses. 2036 * 2037 * <p>If the focused view didn't want this event, this method is called. 2038 * 2039 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 2040 * by calling {@link #onBackPressed()}, though the behavior varies based 2041 * on the application compatibility mode: for 2042 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 2043 * it will set up the dispatch to call {@link #onKeyUp} where the action 2044 * will be performed; for earlier applications, it will perform the 2045 * action immediately in on-down, as those versions of the platform 2046 * behaved. 2047 * 2048 * <p>Other additional default key handling may be performed 2049 * if configured with {@link #setDefaultKeyMode}. 2050 * 2051 * @return Return <code>true</code> to prevent this event from being propagated 2052 * further, or <code>false</code> to indicate that you have not handled 2053 * this event and it should continue to be propagated. 2054 * @see #onKeyUp 2055 * @see android.view.KeyEvent 2056 */ 2057 public boolean onKeyDown(int keyCode, KeyEvent event) { 2058 if (keyCode == KeyEvent.KEYCODE_BACK) { 2059 if (getApplicationInfo().targetSdkVersion 2060 >= Build.VERSION_CODES.ECLAIR) { 2061 event.startTracking(); 2062 } else { 2063 onBackPressed(); 2064 } 2065 return true; 2066 } 2067 2068 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2069 return false; 2070 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2071 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 2072 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2073 return true; 2074 } 2075 return false; 2076 } else { 2077 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2078 boolean clearSpannable = false; 2079 boolean handled; 2080 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2081 clearSpannable = true; 2082 handled = false; 2083 } else { 2084 handled = TextKeyListener.getInstance().onKeyDown( 2085 null, mDefaultKeySsb, keyCode, event); 2086 if (handled && mDefaultKeySsb.length() > 0) { 2087 // something useable has been typed - dispatch it now. 2088 2089 final String str = mDefaultKeySsb.toString(); 2090 clearSpannable = true; 2091 2092 switch (mDefaultKeyMode) { 2093 case DEFAULT_KEYS_DIALER: 2094 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2095 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2096 startActivity(intent); 2097 break; 2098 case DEFAULT_KEYS_SEARCH_LOCAL: 2099 startSearch(str, false, null, false); 2100 break; 2101 case DEFAULT_KEYS_SEARCH_GLOBAL: 2102 startSearch(str, false, null, true); 2103 break; 2104 } 2105 } 2106 } 2107 if (clearSpannable) { 2108 mDefaultKeySsb.clear(); 2109 mDefaultKeySsb.clearSpans(); 2110 Selection.setSelection(mDefaultKeySsb,0); 2111 } 2112 return handled; 2113 } 2114 } 2115 2116 /** 2117 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2118 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2119 * the event). 2120 */ 2121 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2122 return false; 2123 } 2124 2125 /** 2126 * Called when a key was released and not handled by any of the views 2127 * inside of the activity. So, for example, key presses while the cursor 2128 * is inside a TextView will not trigger the event (unless it is a navigation 2129 * to another object) because TextView handles its own key presses. 2130 * 2131 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2132 * and go back. 2133 * 2134 * @return Return <code>true</code> to prevent this event from being propagated 2135 * further, or <code>false</code> to indicate that you have not handled 2136 * this event and it should continue to be propagated. 2137 * @see #onKeyDown 2138 * @see KeyEvent 2139 */ 2140 public boolean onKeyUp(int keyCode, KeyEvent event) { 2141 if (getApplicationInfo().targetSdkVersion 2142 >= Build.VERSION_CODES.ECLAIR) { 2143 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2144 && !event.isCanceled()) { 2145 onBackPressed(); 2146 return true; 2147 } 2148 } 2149 return false; 2150 } 2151 2152 /** 2153 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2154 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2155 * the event). 2156 */ 2157 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2158 return false; 2159 } 2160 2161 /** 2162 * Called when the activity has detected the user's press of the back 2163 * key. The default implementation simply finishes the current activity, 2164 * but you can override this to do whatever you want. 2165 */ 2166 public void onBackPressed() { 2167 if (!mFragments.popBackStackImmediate()) { 2168 finish(); 2169 } 2170 } 2171 2172 /** 2173 * Called when a key shortcut event is not handled by any of the views in the Activity. 2174 * Override this method to implement global key shortcuts for the Activity. 2175 * Key shortcuts can also be implemented by setting the 2176 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 2177 * 2178 * @param keyCode The value in event.getKeyCode(). 2179 * @param event Description of the key event. 2180 * @return True if the key shortcut was handled. 2181 */ 2182 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 2183 return false; 2184 } 2185 2186 /** 2187 * Called when a touch screen event was not handled by any of the views 2188 * under it. This is most useful to process touch events that happen 2189 * outside of your window bounds, where there is no view to receive it. 2190 * 2191 * @param event The touch screen event being processed. 2192 * 2193 * @return Return true if you have consumed the event, false if you haven't. 2194 * The default implementation always returns false. 2195 */ 2196 public boolean onTouchEvent(MotionEvent event) { 2197 if (mWindow.shouldCloseOnTouch(this, event)) { 2198 finish(); 2199 return true; 2200 } 2201 2202 return false; 2203 } 2204 2205 /** 2206 * Called when the trackball was moved and not handled by any of the 2207 * views inside of the activity. So, for example, if the trackball moves 2208 * while focus is on a button, you will receive a call here because 2209 * buttons do not normally do anything with trackball events. The call 2210 * here happens <em>before</em> trackball movements are converted to 2211 * DPAD key events, which then get sent back to the view hierarchy, and 2212 * will be processed at the point for things like focus navigation. 2213 * 2214 * @param event The trackball event being processed. 2215 * 2216 * @return Return true if you have consumed the event, false if you haven't. 2217 * The default implementation always returns false. 2218 */ 2219 public boolean onTrackballEvent(MotionEvent event) { 2220 return false; 2221 } 2222 2223 /** 2224 * Called when a generic motion event was not handled by any of the 2225 * views inside of the activity. 2226 * <p> 2227 * Generic motion events describe joystick movements, mouse hovers, track pad 2228 * touches, scroll wheel movements and other input events. The 2229 * {@link MotionEvent#getSource() source} of the motion event specifies 2230 * the class of input that was received. Implementations of this method 2231 * must examine the bits in the source before processing the event. 2232 * The following code example shows how this is done. 2233 * </p><p> 2234 * Generic motion events with source class 2235 * {@link android.view.InputDevice#SOURCE_CLASS_POINTER} 2236 * are delivered to the view under the pointer. All other generic motion events are 2237 * delivered to the focused view. 2238 * </p><p> 2239 * See {@link View#onGenericMotionEvent(MotionEvent)} for an example of how to 2240 * handle this event. 2241 * </p> 2242 * 2243 * @param event The generic motion event being processed. 2244 * 2245 * @return Return true if you have consumed the event, false if you haven't. 2246 * The default implementation always returns false. 2247 */ 2248 public boolean onGenericMotionEvent(MotionEvent event) { 2249 return false; 2250 } 2251 2252 /** 2253 * Called whenever a key, touch, or trackball event is dispatched to the 2254 * activity. Implement this method if you wish to know that the user has 2255 * interacted with the device in some way while your activity is running. 2256 * This callback and {@link #onUserLeaveHint} are intended to help 2257 * activities manage status bar notifications intelligently; specifically, 2258 * for helping activities determine the proper time to cancel a notfication. 2259 * 2260 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2261 * be accompanied by calls to {@link #onUserInteraction}. This 2262 * ensures that your activity will be told of relevant user activity such 2263 * as pulling down the notification pane and touching an item there. 2264 * 2265 * <p>Note that this callback will be invoked for the touch down action 2266 * that begins a touch gesture, but may not be invoked for the touch-moved 2267 * and touch-up actions that follow. 2268 * 2269 * @see #onUserLeaveHint() 2270 */ 2271 public void onUserInteraction() { 2272 } 2273 2274 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2275 // Update window manager if: we have a view, that view is 2276 // attached to its parent (which will be a RootView), and 2277 // this activity is not embedded. 2278 if (mParent == null) { 2279 View decor = mDecor; 2280 if (decor != null && decor.getParent() != null) { 2281 getWindowManager().updateViewLayout(decor, params); 2282 } 2283 } 2284 } 2285 2286 public void onContentChanged() { 2287 } 2288 2289 /** 2290 * Called when the current {@link Window} of the activity gains or loses 2291 * focus. This is the best indicator of whether this activity is visible 2292 * to the user. The default implementation clears the key tracking 2293 * state, so should always be called. 2294 * 2295 * <p>Note that this provides information about global focus state, which 2296 * is managed independently of activity lifecycles. As such, while focus 2297 * changes will generally have some relation to lifecycle changes (an 2298 * activity that is stopped will not generally get window focus), you 2299 * should not rely on any particular order between the callbacks here and 2300 * those in the other lifecycle methods such as {@link #onResume}. 2301 * 2302 * <p>As a general rule, however, a resumed activity will have window 2303 * focus... unless it has displayed other dialogs or popups that take 2304 * input focus, in which case the activity itself will not have focus 2305 * when the other windows have it. Likewise, the system may display 2306 * system-level windows (such as the status bar notification panel or 2307 * a system alert) which will temporarily take window input focus without 2308 * pausing the foreground activity. 2309 * 2310 * @param hasFocus Whether the window of this activity has focus. 2311 * 2312 * @see #hasWindowFocus() 2313 * @see #onResume 2314 * @see View#onWindowFocusChanged(boolean) 2315 */ 2316 public void onWindowFocusChanged(boolean hasFocus) { 2317 } 2318 2319 /** 2320 * Called when the main window associated with the activity has been 2321 * attached to the window manager. 2322 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2323 * for more information. 2324 * @see View#onAttachedToWindow 2325 */ 2326 public void onAttachedToWindow() { 2327 } 2328 2329 /** 2330 * Called when the main window associated with the activity has been 2331 * detached from the window manager. 2332 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2333 * for more information. 2334 * @see View#onDetachedFromWindow 2335 */ 2336 public void onDetachedFromWindow() { 2337 } 2338 2339 /** 2340 * Returns true if this activity's <em>main</em> window currently has window focus. 2341 * Note that this is not the same as the view itself having focus. 2342 * 2343 * @return True if this activity's main window currently has window focus. 2344 * 2345 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2346 */ 2347 public boolean hasWindowFocus() { 2348 Window w = getWindow(); 2349 if (w != null) { 2350 View d = w.getDecorView(); 2351 if (d != null) { 2352 return d.hasWindowFocus(); 2353 } 2354 } 2355 return false; 2356 } 2357 2358 /** 2359 * Called to process key events. You can override this to intercept all 2360 * key events before they are dispatched to the window. Be sure to call 2361 * this implementation for key events that should be handled normally. 2362 * 2363 * @param event The key event. 2364 * 2365 * @return boolean Return true if this event was consumed. 2366 */ 2367 public boolean dispatchKeyEvent(KeyEvent event) { 2368 onUserInteraction(); 2369 Window win = getWindow(); 2370 if (win.superDispatchKeyEvent(event)) { 2371 return true; 2372 } 2373 View decor = mDecor; 2374 if (decor == null) decor = win.getDecorView(); 2375 return event.dispatch(this, decor != null 2376 ? decor.getKeyDispatcherState() : null, this); 2377 } 2378 2379 /** 2380 * Called to process a key shortcut event. 2381 * You can override this to intercept all key shortcut events before they are 2382 * dispatched to the window. Be sure to call this implementation for key shortcut 2383 * events that should be handled normally. 2384 * 2385 * @param event The key shortcut event. 2386 * @return True if this event was consumed. 2387 */ 2388 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 2389 onUserInteraction(); 2390 if (getWindow().superDispatchKeyShortcutEvent(event)) { 2391 return true; 2392 } 2393 return onKeyShortcut(event.getKeyCode(), event); 2394 } 2395 2396 /** 2397 * Called to process touch screen events. You can override this to 2398 * intercept all touch screen events before they are dispatched to the 2399 * window. Be sure to call this implementation for touch screen events 2400 * that should be handled normally. 2401 * 2402 * @param ev The touch screen event. 2403 * 2404 * @return boolean Return true if this event was consumed. 2405 */ 2406 public boolean dispatchTouchEvent(MotionEvent ev) { 2407 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2408 onUserInteraction(); 2409 } 2410 if (getWindow().superDispatchTouchEvent(ev)) { 2411 return true; 2412 } 2413 return onTouchEvent(ev); 2414 } 2415 2416 /** 2417 * Called to process trackball events. You can override this to 2418 * intercept all trackball events before they are dispatched to the 2419 * window. Be sure to call this implementation for trackball events 2420 * that should be handled normally. 2421 * 2422 * @param ev The trackball event. 2423 * 2424 * @return boolean Return true if this event was consumed. 2425 */ 2426 public boolean dispatchTrackballEvent(MotionEvent ev) { 2427 onUserInteraction(); 2428 if (getWindow().superDispatchTrackballEvent(ev)) { 2429 return true; 2430 } 2431 return onTrackballEvent(ev); 2432 } 2433 2434 /** 2435 * Called to process generic motion events. You can override this to 2436 * intercept all generic motion events before they are dispatched to the 2437 * window. Be sure to call this implementation for generic motion events 2438 * that should be handled normally. 2439 * 2440 * @param ev The generic motion event. 2441 * 2442 * @return boolean Return true if this event was consumed. 2443 */ 2444 public boolean dispatchGenericMotionEvent(MotionEvent ev) { 2445 onUserInteraction(); 2446 if (getWindow().superDispatchGenericMotionEvent(ev)) { 2447 return true; 2448 } 2449 return onGenericMotionEvent(ev); 2450 } 2451 2452 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2453 event.setClassName(getClass().getName()); 2454 event.setPackageName(getPackageName()); 2455 2456 LayoutParams params = getWindow().getAttributes(); 2457 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2458 (params.height == LayoutParams.MATCH_PARENT); 2459 event.setFullScreen(isFullScreen); 2460 2461 CharSequence title = getTitle(); 2462 if (!TextUtils.isEmpty(title)) { 2463 event.getText().add(title); 2464 } 2465 2466 return true; 2467 } 2468 2469 /** 2470 * Default implementation of 2471 * {@link android.view.Window.Callback#onCreatePanelView} 2472 * for activities. This 2473 * simply returns null so that all panel sub-windows will have the default 2474 * menu behavior. 2475 */ 2476 public View onCreatePanelView(int featureId) { 2477 return null; 2478 } 2479 2480 /** 2481 * Default implementation of 2482 * {@link android.view.Window.Callback#onCreatePanelMenu} 2483 * for activities. This calls through to the new 2484 * {@link #onCreateOptionsMenu} method for the 2485 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2486 * so that subclasses of Activity don't need to deal with feature codes. 2487 */ 2488 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2489 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2490 boolean show = onCreateOptionsMenu(menu); 2491 show |= mFragments.dispatchCreateOptionsMenu(menu, getMenuInflater()); 2492 return show; 2493 } 2494 return false; 2495 } 2496 2497 /** 2498 * Default implementation of 2499 * {@link android.view.Window.Callback#onPreparePanel} 2500 * for activities. This 2501 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2502 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2503 * panel, so that subclasses of 2504 * Activity don't need to deal with feature codes. 2505 */ 2506 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2507 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2508 boolean goforit = onPrepareOptionsMenu(menu); 2509 goforit |= mFragments.dispatchPrepareOptionsMenu(menu); 2510 return goforit; 2511 } 2512 return true; 2513 } 2514 2515 /** 2516 * {@inheritDoc} 2517 * 2518 * @return The default implementation returns true. 2519 */ 2520 public boolean onMenuOpened(int featureId, Menu menu) { 2521 if (featureId == Window.FEATURE_ACTION_BAR) { 2522 initActionBar(); 2523 if (mActionBar != null) { 2524 mActionBar.dispatchMenuVisibilityChanged(true); 2525 } else { 2526 Log.e(TAG, "Tried to open action bar menu with no action bar"); 2527 } 2528 } 2529 return true; 2530 } 2531 2532 /** 2533 * Default implementation of 2534 * {@link android.view.Window.Callback#onMenuItemSelected} 2535 * for activities. This calls through to the new 2536 * {@link #onOptionsItemSelected} method for the 2537 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2538 * panel, so that subclasses of 2539 * Activity don't need to deal with feature codes. 2540 */ 2541 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2542 switch (featureId) { 2543 case Window.FEATURE_OPTIONS_PANEL: 2544 // Put event logging here so it gets called even if subclass 2545 // doesn't call through to superclass's implmeentation of each 2546 // of these methods below 2547 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2548 if (onOptionsItemSelected(item)) { 2549 return true; 2550 } 2551 if (mFragments.dispatchOptionsItemSelected(item)) { 2552 return true; 2553 } 2554 if (item.getItemId() == android.R.id.home && mActionBar != null && 2555 (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) { 2556 if (mParent == null) { 2557 return onNavigateUp(); 2558 } else { 2559 return mParent.onNavigateUpFromChild(this); 2560 } 2561 } 2562 return false; 2563 2564 case Window.FEATURE_CONTEXT_MENU: 2565 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2566 if (onContextItemSelected(item)) { 2567 return true; 2568 } 2569 return mFragments.dispatchContextItemSelected(item); 2570 2571 default: 2572 return false; 2573 } 2574 } 2575 2576 /** 2577 * Default implementation of 2578 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2579 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2580 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2581 * so that subclasses of Activity don't need to deal with feature codes. 2582 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2583 * {@link #onContextMenuClosed(Menu)} will be called. 2584 */ 2585 public void onPanelClosed(int featureId, Menu menu) { 2586 switch (featureId) { 2587 case Window.FEATURE_OPTIONS_PANEL: 2588 mFragments.dispatchOptionsMenuClosed(menu); 2589 onOptionsMenuClosed(menu); 2590 break; 2591 2592 case Window.FEATURE_CONTEXT_MENU: 2593 onContextMenuClosed(menu); 2594 break; 2595 2596 case Window.FEATURE_ACTION_BAR: 2597 initActionBar(); 2598 mActionBar.dispatchMenuVisibilityChanged(false); 2599 break; 2600 } 2601 } 2602 2603 /** 2604 * Declare that the options menu has changed, so should be recreated. 2605 * The {@link #onCreateOptionsMenu(Menu)} method will be called the next 2606 * time it needs to be displayed. 2607 */ 2608 public void invalidateOptionsMenu() { 2609 mWindow.invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL); 2610 } 2611 2612 /** 2613 * Initialize the contents of the Activity's standard options menu. You 2614 * should place your menu items in to <var>menu</var>. 2615 * 2616 * <p>This is only called once, the first time the options menu is 2617 * displayed. To update the menu every time it is displayed, see 2618 * {@link #onPrepareOptionsMenu}. 2619 * 2620 * <p>The default implementation populates the menu with standard system 2621 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2622 * they will be correctly ordered with application-defined menu items. 2623 * Deriving classes should always call through to the base implementation. 2624 * 2625 * <p>You can safely hold on to <var>menu</var> (and any items created 2626 * from it), making modifications to it as desired, until the next 2627 * time onCreateOptionsMenu() is called. 2628 * 2629 * <p>When you add items to the menu, you can implement the Activity's 2630 * {@link #onOptionsItemSelected} method to handle them there. 2631 * 2632 * @param menu The options menu in which you place your items. 2633 * 2634 * @return You must return true for the menu to be displayed; 2635 * if you return false it will not be shown. 2636 * 2637 * @see #onPrepareOptionsMenu 2638 * @see #onOptionsItemSelected 2639 */ 2640 public boolean onCreateOptionsMenu(Menu menu) { 2641 if (mParent != null) { 2642 return mParent.onCreateOptionsMenu(menu); 2643 } 2644 return true; 2645 } 2646 2647 /** 2648 * Prepare the Screen's standard options menu to be displayed. This is 2649 * called right before the menu is shown, every time it is shown. You can 2650 * use this method to efficiently enable/disable items or otherwise 2651 * dynamically modify the contents. 2652 * 2653 * <p>The default implementation updates the system menu items based on the 2654 * activity's state. Deriving classes should always call through to the 2655 * base class implementation. 2656 * 2657 * @param menu The options menu as last shown or first initialized by 2658 * onCreateOptionsMenu(). 2659 * 2660 * @return You must return true for the menu to be displayed; 2661 * if you return false it will not be shown. 2662 * 2663 * @see #onCreateOptionsMenu 2664 */ 2665 public boolean onPrepareOptionsMenu(Menu menu) { 2666 if (mParent != null) { 2667 return mParent.onPrepareOptionsMenu(menu); 2668 } 2669 return true; 2670 } 2671 2672 /** 2673 * This hook is called whenever an item in your options menu is selected. 2674 * The default implementation simply returns false to have the normal 2675 * processing happen (calling the item's Runnable or sending a message to 2676 * its Handler as appropriate). You can use this method for any items 2677 * for which you would like to do processing without those other 2678 * facilities. 2679 * 2680 * <p>Derived classes should call through to the base class for it to 2681 * perform the default menu handling.</p> 2682 * 2683 * @param item The menu item that was selected. 2684 * 2685 * @return boolean Return false to allow normal menu processing to 2686 * proceed, true to consume it here. 2687 * 2688 * @see #onCreateOptionsMenu 2689 */ 2690 public boolean onOptionsItemSelected(MenuItem item) { 2691 if (mParent != null) { 2692 return mParent.onOptionsItemSelected(item); 2693 } 2694 return false; 2695 } 2696 2697 /** 2698 * This method is called whenever the user chooses to navigate Up within your application's 2699 * activity hierarchy from the action bar. 2700 * 2701 * <p>If the attribute {@link android.R.attr#parentActivityName parentActivityName} 2702 * was specified in the manifest for this activity or an activity-alias to it, 2703 * default Up navigation will be handled automatically. If any activity 2704 * along the parent chain requires extra Intent arguments, the Activity subclass 2705 * should override the method {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)} 2706 * to supply those arguments.</p> 2707 * 2708 * <p>See <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back Stack</a> 2709 * from the developer guide and <a href="{@docRoot}design/patterns/navigation.html">Navigation</a> 2710 * from the design guide for more information about navigating within your app.</p> 2711 * 2712 * <p>See the {@link TaskStackBuilder} class and the Activity methods 2713 * {@link #getParentActivityIntent()}, {@link #shouldUpRecreateTask(Intent)}, and 2714 * {@link #navigateUpTo(Intent)} for help implementing custom Up navigation. 2715 * The AppNavigation sample application in the Android SDK is also available for reference.</p> 2716 * 2717 * @return true if Up navigation completed successfully and this Activity was finished, 2718 * false otherwise. 2719 */ 2720 public boolean onNavigateUp() { 2721 // Automatically handle hierarchical Up navigation if the proper 2722 // metadata is available. 2723 Intent upIntent = getParentActivityIntent(); 2724 if (upIntent != null) { 2725 if (mActivityInfo.taskAffinity == null) { 2726 // Activities with a null affinity are special; they really shouldn't 2727 // specify a parent activity intent in the first place. Just finish 2728 // the current activity and call it a day. 2729 finish(); 2730 } else if (shouldUpRecreateTask(upIntent)) { 2731 TaskStackBuilder b = TaskStackBuilder.create(this); 2732 onCreateNavigateUpTaskStack(b); 2733 onPrepareNavigateUpTaskStack(b); 2734 b.startActivities(); 2735 2736 // We can't finishAffinity if we have a result. 2737 // Fall back and simply finish the current activity instead. 2738 if (mResultCode != RESULT_CANCELED || mResultData != null) { 2739 // Tell the developer what's going on to avoid hair-pulling. 2740 Log.i(TAG, "onNavigateUp only finishing topmost activity to return a result"); 2741 finish(); 2742 } else { 2743 finishAffinity(); 2744 } 2745 } else { 2746 navigateUpTo(upIntent); 2747 } 2748 return true; 2749 } 2750 return false; 2751 } 2752 2753 /** 2754 * This is called when a child activity of this one attempts to navigate up. 2755 * The default implementation simply calls onNavigateUp() on this activity (the parent). 2756 * 2757 * @param child The activity making the call. 2758 */ 2759 public boolean onNavigateUpFromChild(Activity child) { 2760 return onNavigateUp(); 2761 } 2762 2763 /** 2764 * Define the synthetic task stack that will be generated during Up navigation from 2765 * a different task. 2766 * 2767 * <p>The default implementation of this method adds the parent chain of this activity 2768 * as specified in the manifest to the supplied {@link TaskStackBuilder}. Applications 2769 * may choose to override this method to construct the desired task stack in a different 2770 * way.</p> 2771 * 2772 * <p>This method will be invoked by the default implementation of {@link #onNavigateUp()} 2773 * if {@link #shouldUpRecreateTask(Intent)} returns true when supplied with the intent 2774 * returned by {@link #getParentActivityIntent()}.</p> 2775 * 2776 * <p>Applications that wish to supply extra Intent parameters to the parent stack defined 2777 * by the manifest should override {@link #onPrepareNavigateUpTaskStack(TaskStackBuilder)}.</p> 2778 * 2779 * @param builder An empty TaskStackBuilder - the application should add intents representing 2780 * the desired task stack 2781 */ 2782 public void onCreateNavigateUpTaskStack(TaskStackBuilder builder) { 2783 builder.addParentStack(this); 2784 } 2785 2786 /** 2787 * Prepare the synthetic task stack that will be generated during Up navigation 2788 * from a different task. 2789 * 2790 * <p>This method receives the {@link TaskStackBuilder} with the constructed series of 2791 * Intents as generated by {@link #onCreateNavigateUpTaskStack(TaskStackBuilder)}. 2792 * If any extra data should be added to these intents before launching the new task, 2793 * the application should override this method and add that data here.</p> 2794 * 2795 * @param builder A TaskStackBuilder that has been populated with Intents by 2796 * onCreateNavigateUpTaskStack. 2797 */ 2798 public void onPrepareNavigateUpTaskStack(TaskStackBuilder builder) { 2799 } 2800 2801 /** 2802 * This hook is called whenever the options menu is being closed (either by the user canceling 2803 * the menu with the back/menu button, or when an item is selected). 2804 * 2805 * @param menu The options menu as last shown or first initialized by 2806 * onCreateOptionsMenu(). 2807 */ 2808 public void onOptionsMenuClosed(Menu menu) { 2809 if (mParent != null) { 2810 mParent.onOptionsMenuClosed(menu); 2811 } 2812 } 2813 2814 /** 2815 * Programmatically opens the options menu. If the options menu is already 2816 * open, this method does nothing. 2817 */ 2818 public void openOptionsMenu() { 2819 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2820 } 2821 2822 /** 2823 * Progammatically closes the options menu. If the options menu is already 2824 * closed, this method does nothing. 2825 */ 2826 public void closeOptionsMenu() { 2827 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2828 } 2829 2830 /** 2831 * Called when a context menu for the {@code view} is about to be shown. 2832 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2833 * time the context menu is about to be shown and should be populated for 2834 * the view (or item inside the view for {@link AdapterView} subclasses, 2835 * this can be found in the {@code menuInfo})). 2836 * <p> 2837 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2838 * item has been selected. 2839 * <p> 2840 * It is not safe to hold onto the context menu after this method returns. 2841 * 2842 */ 2843 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2844 } 2845 2846 /** 2847 * Registers a context menu to be shown for the given view (multiple views 2848 * can show the context menu). This method will set the 2849 * {@link OnCreateContextMenuListener} on the view to this activity, so 2850 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2851 * called when it is time to show the context menu. 2852 * 2853 * @see #unregisterForContextMenu(View) 2854 * @param view The view that should show a context menu. 2855 */ 2856 public void registerForContextMenu(View view) { 2857 view.setOnCreateContextMenuListener(this); 2858 } 2859 2860 /** 2861 * Prevents a context menu to be shown for the given view. This method will remove the 2862 * {@link OnCreateContextMenuListener} on the view. 2863 * 2864 * @see #registerForContextMenu(View) 2865 * @param view The view that should stop showing a context menu. 2866 */ 2867 public void unregisterForContextMenu(View view) { 2868 view.setOnCreateContextMenuListener(null); 2869 } 2870 2871 /** 2872 * Programmatically opens the context menu for a particular {@code view}. 2873 * The {@code view} should have been added via 2874 * {@link #registerForContextMenu(View)}. 2875 * 2876 * @param view The view to show the context menu for. 2877 */ 2878 public void openContextMenu(View view) { 2879 view.showContextMenu(); 2880 } 2881 2882 /** 2883 * Programmatically closes the most recently opened context menu, if showing. 2884 */ 2885 public void closeContextMenu() { 2886 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2887 } 2888 2889 /** 2890 * This hook is called whenever an item in a context menu is selected. The 2891 * default implementation simply returns false to have the normal processing 2892 * happen (calling the item's Runnable or sending a message to its Handler 2893 * as appropriate). You can use this method for any items for which you 2894 * would like to do processing without those other facilities. 2895 * <p> 2896 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2897 * View that added this menu item. 2898 * <p> 2899 * Derived classes should call through to the base class for it to perform 2900 * the default menu handling. 2901 * 2902 * @param item The context menu item that was selected. 2903 * @return boolean Return false to allow normal context menu processing to 2904 * proceed, true to consume it here. 2905 */ 2906 public boolean onContextItemSelected(MenuItem item) { 2907 if (mParent != null) { 2908 return mParent.onContextItemSelected(item); 2909 } 2910 return false; 2911 } 2912 2913 /** 2914 * This hook is called whenever the context menu is being closed (either by 2915 * the user canceling the menu with the back/menu button, or when an item is 2916 * selected). 2917 * 2918 * @param menu The context menu that is being closed. 2919 */ 2920 public void onContextMenuClosed(Menu menu) { 2921 if (mParent != null) { 2922 mParent.onContextMenuClosed(menu); 2923 } 2924 } 2925 2926 /** 2927 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2928 */ 2929 @Deprecated 2930 protected Dialog onCreateDialog(int id) { 2931 return null; 2932 } 2933 2934 /** 2935 * Callback for creating dialogs that are managed (saved and restored) for you 2936 * by the activity. The default implementation calls through to 2937 * {@link #onCreateDialog(int)} for compatibility. 2938 * 2939 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 2940 * or later, consider instead using a {@link DialogFragment} instead.</em> 2941 * 2942 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2943 * this method the first time, and hang onto it thereafter. Any dialog 2944 * that is created by this method will automatically be saved and restored 2945 * for you, including whether it is showing. 2946 * 2947 * <p>If you would like the activity to manage saving and restoring dialogs 2948 * for you, you should override this method and handle any ids that are 2949 * passed to {@link #showDialog}. 2950 * 2951 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2952 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2953 * 2954 * @param id The id of the dialog. 2955 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2956 * @return The dialog. If you return null, the dialog will not be created. 2957 * 2958 * @see #onPrepareDialog(int, Dialog, Bundle) 2959 * @see #showDialog(int, Bundle) 2960 * @see #dismissDialog(int) 2961 * @see #removeDialog(int) 2962 * 2963 * @deprecated Use the new {@link DialogFragment} class with 2964 * {@link FragmentManager} instead; this is also 2965 * available on older platforms through the Android compatibility package. 2966 */ 2967 @Deprecated 2968 protected Dialog onCreateDialog(int id, Bundle args) { 2969 return onCreateDialog(id); 2970 } 2971 2972 /** 2973 * @deprecated Old no-arguments version of 2974 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2975 */ 2976 @Deprecated 2977 protected void onPrepareDialog(int id, Dialog dialog) { 2978 dialog.setOwnerActivity(this); 2979 } 2980 2981 /** 2982 * Provides an opportunity to prepare a managed dialog before it is being 2983 * shown. The default implementation calls through to 2984 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2985 * 2986 * <p> 2987 * Override this if you need to update a managed dialog based on the state 2988 * of the application each time it is shown. For example, a time picker 2989 * dialog might want to be updated with the current time. You should call 2990 * through to the superclass's implementation. The default implementation 2991 * will set this Activity as the owner activity on the Dialog. 2992 * 2993 * @param id The id of the managed dialog. 2994 * @param dialog The dialog. 2995 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2996 * @see #onCreateDialog(int, Bundle) 2997 * @see #showDialog(int) 2998 * @see #dismissDialog(int) 2999 * @see #removeDialog(int) 3000 * 3001 * @deprecated Use the new {@link DialogFragment} class with 3002 * {@link FragmentManager} instead; this is also 3003 * available on older platforms through the Android compatibility package. 3004 */ 3005 @Deprecated 3006 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 3007 onPrepareDialog(id, dialog); 3008 } 3009 3010 /** 3011 * Simple version of {@link #showDialog(int, Bundle)} that does not 3012 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 3013 * with null arguments. 3014 * 3015 * @deprecated Use the new {@link DialogFragment} class with 3016 * {@link FragmentManager} instead; this is also 3017 * available on older platforms through the Android compatibility package. 3018 */ 3019 @Deprecated 3020 public final void showDialog(int id) { 3021 showDialog(id, null); 3022 } 3023 3024 /** 3025 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 3026 * will be made with the same id the first time this is called for a given 3027 * id. From thereafter, the dialog will be automatically saved and restored. 3028 * 3029 * <em>If you are targeting {@link android.os.Build.VERSION_CODES#HONEYCOMB} 3030 * or later, consider instead using a {@link DialogFragment} instead.</em> 3031 * 3032 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 3033 * be made to provide an opportunity to do any timely preparation. 3034 * 3035 * @param id The id of the managed dialog. 3036 * @param args Arguments to pass through to the dialog. These will be saved 3037 * and restored for you. Note that if the dialog is already created, 3038 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 3039 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 3040 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 3041 * @return Returns true if the Dialog was created; false is returned if 3042 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 3043 * 3044 * @see Dialog 3045 * @see #onCreateDialog(int, Bundle) 3046 * @see #onPrepareDialog(int, Dialog, Bundle) 3047 * @see #dismissDialog(int) 3048 * @see #removeDialog(int) 3049 * 3050 * @deprecated Use the new {@link DialogFragment} class with 3051 * {@link FragmentManager} instead; this is also 3052 * available on older platforms through the Android compatibility package. 3053 */ 3054 @Deprecated 3055 public final boolean showDialog(int id, Bundle args) { 3056 if (mManagedDialogs == null) { 3057 mManagedDialogs = new SparseArray<ManagedDialog>(); 3058 } 3059 ManagedDialog md = mManagedDialogs.get(id); 3060 if (md == null) { 3061 md = new ManagedDialog(); 3062 md.mDialog = createDialog(id, null, args); 3063 if (md.mDialog == null) { 3064 return false; 3065 } 3066 mManagedDialogs.put(id, md); 3067 } 3068 3069 md.mArgs = args; 3070 onPrepareDialog(id, md.mDialog, args); 3071 md.mDialog.show(); 3072 return true; 3073 } 3074 3075 /** 3076 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 3077 * 3078 * @param id The id of the managed dialog. 3079 * 3080 * @throws IllegalArgumentException if the id was not previously shown via 3081 * {@link #showDialog(int)}. 3082 * 3083 * @see #onCreateDialog(int, Bundle) 3084 * @see #onPrepareDialog(int, Dialog, Bundle) 3085 * @see #showDialog(int) 3086 * @see #removeDialog(int) 3087 * 3088 * @deprecated Use the new {@link DialogFragment} class with 3089 * {@link FragmentManager} instead; this is also 3090 * available on older platforms through the Android compatibility package. 3091 */ 3092 @Deprecated 3093 public final void dismissDialog(int id) { 3094 if (mManagedDialogs == null) { 3095 throw missingDialog(id); 3096 } 3097 3098 final ManagedDialog md = mManagedDialogs.get(id); 3099 if (md == null) { 3100 throw missingDialog(id); 3101 } 3102 md.mDialog.dismiss(); 3103 } 3104 3105 /** 3106 * Creates an exception to throw if a user passed in a dialog id that is 3107 * unexpected. 3108 */ 3109 private IllegalArgumentException missingDialog(int id) { 3110 return new IllegalArgumentException("no dialog with id " + id + " was ever " 3111 + "shown via Activity#showDialog"); 3112 } 3113 3114 /** 3115 * Removes any internal references to a dialog managed by this Activity. 3116 * If the dialog is showing, it will dismiss it as part of the clean up. 3117 * 3118 * <p>This can be useful if you know that you will never show a dialog again and 3119 * want to avoid the overhead of saving and restoring it in the future. 3120 * 3121 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, this function 3122 * will not throw an exception if you try to remove an ID that does not 3123 * currently have an associated dialog.</p> 3124 * 3125 * @param id The id of the managed dialog. 3126 * 3127 * @see #onCreateDialog(int, Bundle) 3128 * @see #onPrepareDialog(int, Dialog, Bundle) 3129 * @see #showDialog(int) 3130 * @see #dismissDialog(int) 3131 * 3132 * @deprecated Use the new {@link DialogFragment} class with 3133 * {@link FragmentManager} instead; this is also 3134 * available on older platforms through the Android compatibility package. 3135 */ 3136 @Deprecated 3137 public final void removeDialog(int id) { 3138 if (mManagedDialogs != null) { 3139 final ManagedDialog md = mManagedDialogs.get(id); 3140 if (md != null) { 3141 md.mDialog.dismiss(); 3142 mManagedDialogs.remove(id); 3143 } 3144 } 3145 } 3146 3147 /** 3148 * This hook is called when the user signals the desire to start a search. 3149 * 3150 * <p>You can use this function as a simple way to launch the search UI, in response to a 3151 * menu item, search button, or other widgets within your activity. Unless overidden, 3152 * calling this function is the same as calling 3153 * {@link #startSearch startSearch(null, false, null, false)}, which launches 3154 * search for the current activity as specified in its manifest, see {@link SearchManager}. 3155 * 3156 * <p>You can override this function to force global search, e.g. in response to a dedicated 3157 * search key, or to block search entirely (by simply returning false). 3158 * 3159 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 3160 * The default implementation always returns {@code true}. 3161 * 3162 * @see android.app.SearchManager 3163 */ 3164 public boolean onSearchRequested() { 3165 startSearch(null, false, null, false); 3166 return true; 3167 } 3168 3169 /** 3170 * This hook is called to launch the search UI. 3171 * 3172 * <p>It is typically called from onSearchRequested(), either directly from 3173 * Activity.onSearchRequested() or from an overridden version in any given 3174 * Activity. If your goal is simply to activate search, it is preferred to call 3175 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 3176 * is to inject specific data such as context data, it is preferred to <i>override</i> 3177 * onSearchRequested(), so that any callers to it will benefit from the override. 3178 * 3179 * @param initialQuery Any non-null non-empty string will be inserted as 3180 * pre-entered text in the search query box. 3181 * @param selectInitialQuery If true, the intial query will be preselected, which means that 3182 * any further typing will replace it. This is useful for cases where an entire pre-formed 3183 * query is being inserted. If false, the selection point will be placed at the end of the 3184 * inserted query. This is useful when the inserted query is text that the user entered, 3185 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 3186 * if initialQuery is a non-empty string.</i> 3187 * @param appSearchData An application can insert application-specific 3188 * context here, in order to improve quality or specificity of its own 3189 * searches. This data will be returned with SEARCH intent(s). Null if 3190 * no extra data is required. 3191 * @param globalSearch If false, this will only launch the search that has been specifically 3192 * defined by the application (which is usually defined as a local search). If no default 3193 * search is defined in the current application or activity, global search will be launched. 3194 * If true, this will always launch a platform-global (e.g. web-based) search instead. 3195 * 3196 * @see android.app.SearchManager 3197 * @see #onSearchRequested 3198 */ 3199 public void startSearch(String initialQuery, boolean selectInitialQuery, 3200 Bundle appSearchData, boolean globalSearch) { 3201 ensureSearchManager(); 3202 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 3203 appSearchData, globalSearch); 3204 } 3205 3206 /** 3207 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 3208 * the search dialog. Made available for testing purposes. 3209 * 3210 * @param query The query to trigger. If empty, the request will be ignored. 3211 * @param appSearchData An application can insert application-specific 3212 * context here, in order to improve quality or specificity of its own 3213 * searches. This data will be returned with SEARCH intent(s). Null if 3214 * no extra data is required. 3215 */ 3216 public void triggerSearch(String query, Bundle appSearchData) { 3217 ensureSearchManager(); 3218 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 3219 } 3220 3221 /** 3222 * Request that key events come to this activity. Use this if your 3223 * activity has no views with focus, but the activity still wants 3224 * a chance to process key events. 3225 * 3226 * @see android.view.Window#takeKeyEvents 3227 */ 3228 public void takeKeyEvents(boolean get) { 3229 getWindow().takeKeyEvents(get); 3230 } 3231 3232 /** 3233 * Enable extended window features. This is a convenience for calling 3234 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 3235 * 3236 * @param featureId The desired feature as defined in 3237 * {@link android.view.Window}. 3238 * @return Returns true if the requested feature is supported and now 3239 * enabled. 3240 * 3241 * @see android.view.Window#requestFeature 3242 */ 3243 public final boolean requestWindowFeature(int featureId) { 3244 return getWindow().requestFeature(featureId); 3245 } 3246 3247 /** 3248 * Convenience for calling 3249 * {@link android.view.Window#setFeatureDrawableResource}. 3250 */ 3251 public final void setFeatureDrawableResource(int featureId, int resId) { 3252 getWindow().setFeatureDrawableResource(featureId, resId); 3253 } 3254 3255 /** 3256 * Convenience for calling 3257 * {@link android.view.Window#setFeatureDrawableUri}. 3258 */ 3259 public final void setFeatureDrawableUri(int featureId, Uri uri) { 3260 getWindow().setFeatureDrawableUri(featureId, uri); 3261 } 3262 3263 /** 3264 * Convenience for calling 3265 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 3266 */ 3267 public final void setFeatureDrawable(int featureId, Drawable drawable) { 3268 getWindow().setFeatureDrawable(featureId, drawable); 3269 } 3270 3271 /** 3272 * Convenience for calling 3273 * {@link android.view.Window#setFeatureDrawableAlpha}. 3274 */ 3275 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 3276 getWindow().setFeatureDrawableAlpha(featureId, alpha); 3277 } 3278 3279 /** 3280 * Convenience for calling 3281 * {@link android.view.Window#getLayoutInflater}. 3282 */ 3283 public LayoutInflater getLayoutInflater() { 3284 return getWindow().getLayoutInflater(); 3285 } 3286 3287 /** 3288 * Returns a {@link MenuInflater} with this context. 3289 */ 3290 public MenuInflater getMenuInflater() { 3291 // Make sure that action views can get an appropriate theme. 3292 if (mMenuInflater == null) { 3293 initActionBar(); 3294 if (mActionBar != null) { 3295 mMenuInflater = new MenuInflater(mActionBar.getThemedContext(), this); 3296 } else { 3297 mMenuInflater = new MenuInflater(this); 3298 } 3299 } 3300 return mMenuInflater; 3301 } 3302 3303 @Override 3304 protected void onApplyThemeResource(Resources.Theme theme, int resid, 3305 boolean first) { 3306 if (mParent == null) { 3307 super.onApplyThemeResource(theme, resid, first); 3308 } else { 3309 try { 3310 theme.setTo(mParent.getTheme()); 3311 } catch (Exception e) { 3312 // Empty 3313 } 3314 theme.applyStyle(resid, false); 3315 } 3316 } 3317 3318 /** 3319 * Same as calling {@link #startActivityForResult(Intent, int, Bundle)} 3320 * with no options. 3321 * 3322 * @param intent The intent to start. 3323 * @param requestCode If >= 0, this code will be returned in 3324 * onActivityResult() when the activity exits. 3325 * 3326 * @throws android.content.ActivityNotFoundException 3327 * 3328 * @see #startActivity 3329 */ 3330 public void startActivityForResult(Intent intent, int requestCode) { 3331 startActivityForResult(intent, requestCode, null); 3332 } 3333 3334 /** 3335 * Launch an activity for which you would like a result when it finished. 3336 * When this activity exits, your 3337 * onActivityResult() method will be called with the given requestCode. 3338 * Using a negative requestCode is the same as calling 3339 * {@link #startActivity} (the activity is not launched as a sub-activity). 3340 * 3341 * <p>Note that this method should only be used with Intent protocols 3342 * that are defined to return a result. In other protocols (such as 3343 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 3344 * not get the result when you expect. For example, if the activity you 3345 * are launching uses the singleTask launch mode, it will not run in your 3346 * task and thus you will immediately receive a cancel result. 3347 * 3348 * <p>As a special case, if you call startActivityForResult() with a requestCode 3349 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 3350 * activity, then your window will not be displayed until a result is 3351 * returned back from the started activity. This is to avoid visible 3352 * flickering when redirecting to another activity. 3353 * 3354 * <p>This method throws {@link android.content.ActivityNotFoundException} 3355 * if there was no Activity found to run the given Intent. 3356 * 3357 * @param intent The intent to start. 3358 * @param requestCode If >= 0, this code will be returned in 3359 * onActivityResult() when the activity exits. 3360 * @param options Additional options for how the Activity should be started. 3361 * See {@link android.content.Context#startActivity(Intent, Bundle) 3362 * Context.startActivity(Intent, Bundle)} for more details. 3363 * 3364 * @throws android.content.ActivityNotFoundException 3365 * 3366 * @see #startActivity 3367 */ 3368 public void startActivityForResult(Intent intent, int requestCode, Bundle options) { 3369 if (mParent == null) { 3370 Instrumentation.ActivityResult ar = 3371 mInstrumentation.execStartActivity( 3372 this, mMainThread.getApplicationThread(), mToken, this, 3373 intent, requestCode, options); 3374 if (ar != null) { 3375 mMainThread.sendActivityResult( 3376 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 3377 ar.getResultData()); 3378 } 3379 if (requestCode >= 0) { 3380 // If this start is requesting a result, we can avoid making 3381 // the activity visible until the result is received. Setting 3382 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3383 // activity hidden during this time, to avoid flickering. 3384 // This can only be done when a result is requested because 3385 // that guarantees we will get information back when the 3386 // activity is finished, no matter what happens to it. 3387 mStartedActivity = true; 3388 } 3389 } else { 3390 if (options != null) { 3391 mParent.startActivityFromChild(this, intent, requestCode, options); 3392 } else { 3393 // Note we want to go through this method for compatibility with 3394 // existing applications that may have overridden it. 3395 mParent.startActivityFromChild(this, intent, requestCode); 3396 } 3397 } 3398 } 3399 3400 /** 3401 * @hide Implement to provide correct calling token. 3402 */ 3403 public void startActivityAsUser(Intent intent, UserHandle user) { 3404 startActivityAsUser(intent, null, user); 3405 } 3406 3407 /** 3408 * @hide Implement to provide correct calling token. 3409 */ 3410 public void startActivityAsUser(Intent intent, Bundle options, UserHandle user) { 3411 if (mParent != null) { 3412 throw new RuntimeException("Called be called from a child"); 3413 } 3414 Instrumentation.ActivityResult ar = 3415 mInstrumentation.execStartActivity( 3416 this, mMainThread.getApplicationThread(), mToken, this, 3417 intent, -1, options, user); 3418 if (ar != null) { 3419 mMainThread.sendActivityResult( 3420 mToken, mEmbeddedID, -1, ar.getResultCode(), 3421 ar.getResultData()); 3422 } 3423 } 3424 3425 /** 3426 * Same as calling {@link #startIntentSenderForResult(IntentSender, int, 3427 * Intent, int, int, int, Bundle)} with no options. 3428 * 3429 * @param intent The IntentSender to launch. 3430 * @param requestCode If >= 0, this code will be returned in 3431 * onActivityResult() when the activity exits. 3432 * @param fillInIntent If non-null, this will be provided as the 3433 * intent parameter to {@link IntentSender#sendIntent}. 3434 * @param flagsMask Intent flags in the original IntentSender that you 3435 * would like to change. 3436 * @param flagsValues Desired values for any bits set in 3437 * <var>flagsMask</var> 3438 * @param extraFlags Always set to 0. 3439 */ 3440 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3441 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3442 throws IntentSender.SendIntentException { 3443 startIntentSenderForResult(intent, requestCode, fillInIntent, flagsMask, 3444 flagsValues, extraFlags, null); 3445 } 3446 3447 /** 3448 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 3449 * to use a IntentSender to describe the activity to be started. If 3450 * the IntentSender is for an activity, that activity will be started 3451 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 3452 * here; otherwise, its associated action will be executed (such as 3453 * sending a broadcast) as if you had called 3454 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 3455 * 3456 * @param intent The IntentSender to launch. 3457 * @param requestCode If >= 0, this code will be returned in 3458 * onActivityResult() when the activity exits. 3459 * @param fillInIntent If non-null, this will be provided as the 3460 * intent parameter to {@link IntentSender#sendIntent}. 3461 * @param flagsMask Intent flags in the original IntentSender that you 3462 * would like to change. 3463 * @param flagsValues Desired values for any bits set in 3464 * <var>flagsMask</var> 3465 * @param extraFlags Always set to 0. 3466 * @param options Additional options for how the Activity should be started. 3467 * See {@link android.content.Context#startActivity(Intent, Bundle) 3468 * Context.startActivity(Intent, Bundle)} for more details. If options 3469 * have also been supplied by the IntentSender, options given here will 3470 * override any that conflict with those given by the IntentSender. 3471 */ 3472 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3473 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 3474 Bundle options) throws IntentSender.SendIntentException { 3475 if (mParent == null) { 3476 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3477 flagsMask, flagsValues, this, options); 3478 } else if (options != null) { 3479 mParent.startIntentSenderFromChild(this, intent, requestCode, 3480 fillInIntent, flagsMask, flagsValues, extraFlags, options); 3481 } else { 3482 // Note we want to go through this call for compatibility with 3483 // existing applications that may have overridden the method. 3484 mParent.startIntentSenderFromChild(this, intent, requestCode, 3485 fillInIntent, flagsMask, flagsValues, extraFlags); 3486 } 3487 } 3488 3489 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 3490 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity, 3491 Bundle options) 3492 throws IntentSender.SendIntentException { 3493 try { 3494 String resolvedType = null; 3495 if (fillInIntent != null) { 3496 fillInIntent.setAllowFds(false); 3497 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 3498 } 3499 int result = ActivityManagerNative.getDefault() 3500 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 3501 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 3502 requestCode, flagsMask, flagsValues, options); 3503 if (result == ActivityManager.START_CANCELED) { 3504 throw new IntentSender.SendIntentException(); 3505 } 3506 Instrumentation.checkStartActivityResult(result, null); 3507 } catch (RemoteException e) { 3508 } 3509 if (requestCode >= 0) { 3510 // If this start is requesting a result, we can avoid making 3511 // the activity visible until the result is received. Setting 3512 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3513 // activity hidden during this time, to avoid flickering. 3514 // This can only be done when a result is requested because 3515 // that guarantees we will get information back when the 3516 // activity is finished, no matter what happens to it. 3517 mStartedActivity = true; 3518 } 3519 } 3520 3521 /** 3522 * Same as {@link #startActivity(Intent, Bundle)} with no options 3523 * specified. 3524 * 3525 * @param intent The intent to start. 3526 * 3527 * @throws android.content.ActivityNotFoundException 3528 * 3529 * @see {@link #startActivity(Intent, Bundle)} 3530 * @see #startActivityForResult 3531 */ 3532 @Override 3533 public void startActivity(Intent intent) { 3534 startActivity(intent, null); 3535 } 3536 3537 /** 3538 * Launch a new activity. You will not receive any information about when 3539 * the activity exits. This implementation overrides the base version, 3540 * providing information about 3541 * the activity performing the launch. Because of this additional 3542 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3543 * required; if not specified, the new activity will be added to the 3544 * task of the caller. 3545 * 3546 * <p>This method throws {@link android.content.ActivityNotFoundException} 3547 * if there was no Activity found to run the given Intent. 3548 * 3549 * @param intent The intent to start. 3550 * @param options Additional options for how the Activity should be started. 3551 * See {@link android.content.Context#startActivity(Intent, Bundle) 3552 * Context.startActivity(Intent, Bundle)} for more details. 3553 * 3554 * @throws android.content.ActivityNotFoundException 3555 * 3556 * @see {@link #startActivity(Intent)} 3557 * @see #startActivityForResult 3558 */ 3559 @Override 3560 public void startActivity(Intent intent, Bundle options) { 3561 if (options != null) { 3562 startActivityForResult(intent, -1, options); 3563 } else { 3564 // Note we want to go through this call for compatibility with 3565 // applications that may have overridden the method. 3566 startActivityForResult(intent, -1); 3567 } 3568 } 3569 3570 /** 3571 * Same as {@link #startActivities(Intent[], Bundle)} with no options 3572 * specified. 3573 * 3574 * @param intents The intents to start. 3575 * 3576 * @throws android.content.ActivityNotFoundException 3577 * 3578 * @see {@link #startActivities(Intent[], Bundle)} 3579 * @see #startActivityForResult 3580 */ 3581 @Override 3582 public void startActivities(Intent[] intents) { 3583 startActivities(intents, null); 3584 } 3585 3586 /** 3587 * Launch a new activity. You will not receive any information about when 3588 * the activity exits. This implementation overrides the base version, 3589 * providing information about 3590 * the activity performing the launch. Because of this additional 3591 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3592 * required; if not specified, the new activity will be added to the 3593 * task of the caller. 3594 * 3595 * <p>This method throws {@link android.content.ActivityNotFoundException} 3596 * if there was no Activity found to run the given Intent. 3597 * 3598 * @param intents The intents to start. 3599 * @param options Additional options for how the Activity should be started. 3600 * See {@link android.content.Context#startActivity(Intent, Bundle) 3601 * Context.startActivity(Intent, Bundle)} for more details. 3602 * 3603 * @throws android.content.ActivityNotFoundException 3604 * 3605 * @see {@link #startActivities(Intent[])} 3606 * @see #startActivityForResult 3607 */ 3608 @Override 3609 public void startActivities(Intent[] intents, Bundle options) { 3610 mInstrumentation.execStartActivities(this, mMainThread.getApplicationThread(), 3611 mToken, this, intents, options); 3612 } 3613 3614 /** 3615 * Same as calling {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 3616 * with no options. 3617 * 3618 * @param intent The IntentSender to launch. 3619 * @param fillInIntent If non-null, this will be provided as the 3620 * intent parameter to {@link IntentSender#sendIntent}. 3621 * @param flagsMask Intent flags in the original IntentSender that you 3622 * would like to change. 3623 * @param flagsValues Desired values for any bits set in 3624 * <var>flagsMask</var> 3625 * @param extraFlags Always set to 0. 3626 */ 3627 public void startIntentSender(IntentSender intent, 3628 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3629 throws IntentSender.SendIntentException { 3630 startIntentSender(intent, fillInIntent, flagsMask, flagsValues, 3631 extraFlags, null); 3632 } 3633 3634 /** 3635 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 3636 * to start; see 3637 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int, Bundle)} 3638 * for more information. 3639 * 3640 * @param intent The IntentSender to launch. 3641 * @param fillInIntent If non-null, this will be provided as the 3642 * intent parameter to {@link IntentSender#sendIntent}. 3643 * @param flagsMask Intent flags in the original IntentSender that you 3644 * would like to change. 3645 * @param flagsValues Desired values for any bits set in 3646 * <var>flagsMask</var> 3647 * @param extraFlags Always set to 0. 3648 * @param options Additional options for how the Activity should be started. 3649 * See {@link android.content.Context#startActivity(Intent, Bundle) 3650 * Context.startActivity(Intent, Bundle)} for more details. If options 3651 * have also been supplied by the IntentSender, options given here will 3652 * override any that conflict with those given by the IntentSender. 3653 */ 3654 public void startIntentSender(IntentSender intent, 3655 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 3656 Bundle options) throws IntentSender.SendIntentException { 3657 if (options != null) { 3658 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3659 flagsValues, extraFlags, options); 3660 } else { 3661 // Note we want to go through this call for compatibility with 3662 // applications that may have overridden the method. 3663 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3664 flagsValues, extraFlags); 3665 } 3666 } 3667 3668 /** 3669 * Same as calling {@link #startActivityIfNeeded(Intent, int, Bundle)} 3670 * with no options. 3671 * 3672 * @param intent The intent to start. 3673 * @param requestCode If >= 0, this code will be returned in 3674 * onActivityResult() when the activity exits, as described in 3675 * {@link #startActivityForResult}. 3676 * 3677 * @return If a new activity was launched then true is returned; otherwise 3678 * false is returned and you must handle the Intent yourself. 3679 * 3680 * @see #startActivity 3681 * @see #startActivityForResult 3682 */ 3683 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 3684 return startActivityIfNeeded(intent, requestCode, null); 3685 } 3686 3687 /** 3688 * A special variation to launch an activity only if a new activity 3689 * instance is needed to handle the given Intent. In other words, this is 3690 * just like {@link #startActivityForResult(Intent, int)} except: if you are 3691 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 3692 * singleTask or singleTop 3693 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 3694 * and the activity 3695 * that handles <var>intent</var> is the same as your currently running 3696 * activity, then a new instance is not needed. In this case, instead of 3697 * the normal behavior of calling {@link #onNewIntent} this function will 3698 * return and you can handle the Intent yourself. 3699 * 3700 * <p>This function can only be called from a top-level activity; if it is 3701 * called from a child activity, a runtime exception will be thrown. 3702 * 3703 * @param intent The intent to start. 3704 * @param requestCode If >= 0, this code will be returned in 3705 * onActivityResult() when the activity exits, as described in 3706 * {@link #startActivityForResult}. 3707 * @param options Additional options for how the Activity should be started. 3708 * See {@link android.content.Context#startActivity(Intent, Bundle) 3709 * Context.startActivity(Intent, Bundle)} for more details. 3710 * 3711 * @return If a new activity was launched then true is returned; otherwise 3712 * false is returned and you must handle the Intent yourself. 3713 * 3714 * @see #startActivity 3715 * @see #startActivityForResult 3716 */ 3717 public boolean startActivityIfNeeded(Intent intent, int requestCode, Bundle options) { 3718 if (mParent == null) { 3719 int result = ActivityManager.START_RETURN_INTENT_TO_CALLER; 3720 try { 3721 intent.setAllowFds(false); 3722 result = ActivityManagerNative.getDefault() 3723 .startActivity(mMainThread.getApplicationThread(), 3724 intent, intent.resolveTypeIfNeeded(getContentResolver()), 3725 mToken, mEmbeddedID, requestCode, 3726 ActivityManager.START_FLAG_ONLY_IF_NEEDED, null, null, 3727 options); 3728 } catch (RemoteException e) { 3729 // Empty 3730 } 3731 3732 Instrumentation.checkStartActivityResult(result, intent); 3733 3734 if (requestCode >= 0) { 3735 // If this start is requesting a result, we can avoid making 3736 // the activity visible until the result is received. Setting 3737 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3738 // activity hidden during this time, to avoid flickering. 3739 // This can only be done when a result is requested because 3740 // that guarantees we will get information back when the 3741 // activity is finished, no matter what happens to it. 3742 mStartedActivity = true; 3743 } 3744 return result != ActivityManager.START_RETURN_INTENT_TO_CALLER; 3745 } 3746 3747 throw new UnsupportedOperationException( 3748 "startActivityIfNeeded can only be called from a top-level activity"); 3749 } 3750 3751 /** 3752 * Same as calling {@link #startNextMatchingActivity(Intent, Bundle)} with 3753 * no options. 3754 * 3755 * @param intent The intent to dispatch to the next activity. For 3756 * correct behavior, this must be the same as the Intent that started 3757 * your own activity; the only changes you can make are to the extras 3758 * inside of it. 3759 * 3760 * @return Returns a boolean indicating whether there was another Activity 3761 * to start: true if there was a next activity to start, false if there 3762 * wasn't. In general, if true is returned you will then want to call 3763 * finish() on yourself. 3764 */ 3765 public boolean startNextMatchingActivity(Intent intent) { 3766 return startNextMatchingActivity(intent, null); 3767 } 3768 3769 /** 3770 * Special version of starting an activity, for use when you are replacing 3771 * other activity components. You can use this to hand the Intent off 3772 * to the next Activity that can handle it. You typically call this in 3773 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3774 * 3775 * @param intent The intent to dispatch to the next activity. For 3776 * correct behavior, this must be the same as the Intent that started 3777 * your own activity; the only changes you can make are to the extras 3778 * inside of it. 3779 * @param options Additional options for how the Activity should be started. 3780 * See {@link android.content.Context#startActivity(Intent, Bundle) 3781 * Context.startActivity(Intent, Bundle)} for more details. 3782 * 3783 * @return Returns a boolean indicating whether there was another Activity 3784 * to start: true if there was a next activity to start, false if there 3785 * wasn't. In general, if true is returned you will then want to call 3786 * finish() on yourself. 3787 */ 3788 public boolean startNextMatchingActivity(Intent intent, Bundle options) { 3789 if (mParent == null) { 3790 try { 3791 intent.setAllowFds(false); 3792 return ActivityManagerNative.getDefault() 3793 .startNextMatchingActivity(mToken, intent, options); 3794 } catch (RemoteException e) { 3795 // Empty 3796 } 3797 return false; 3798 } 3799 3800 throw new UnsupportedOperationException( 3801 "startNextMatchingActivity can only be called from a top-level activity"); 3802 } 3803 3804 /** 3805 * Same as calling {@link #startActivityFromChild(Activity, Intent, int, Bundle)} 3806 * with no options. 3807 * 3808 * @param child The activity making the call. 3809 * @param intent The intent to start. 3810 * @param requestCode Reply request code. < 0 if reply is not requested. 3811 * 3812 * @throws android.content.ActivityNotFoundException 3813 * 3814 * @see #startActivity 3815 * @see #startActivityForResult 3816 */ 3817 public void startActivityFromChild(Activity child, Intent intent, 3818 int requestCode) { 3819 startActivityFromChild(child, intent, requestCode, null); 3820 } 3821 3822 /** 3823 * This is called when a child activity of this one calls its 3824 * {@link #startActivity} or {@link #startActivityForResult} method. 3825 * 3826 * <p>This method throws {@link android.content.ActivityNotFoundException} 3827 * if there was no Activity found to run the given Intent. 3828 * 3829 * @param child The activity making the call. 3830 * @param intent The intent to start. 3831 * @param requestCode Reply request code. < 0 if reply is not requested. 3832 * @param options Additional options for how the Activity should be started. 3833 * See {@link android.content.Context#startActivity(Intent, Bundle) 3834 * Context.startActivity(Intent, Bundle)} for more details. 3835 * 3836 * @throws android.content.ActivityNotFoundException 3837 * 3838 * @see #startActivity 3839 * @see #startActivityForResult 3840 */ 3841 public void startActivityFromChild(Activity child, Intent intent, 3842 int requestCode, Bundle options) { 3843 Instrumentation.ActivityResult ar = 3844 mInstrumentation.execStartActivity( 3845 this, mMainThread.getApplicationThread(), mToken, child, 3846 intent, requestCode, options); 3847 if (ar != null) { 3848 mMainThread.sendActivityResult( 3849 mToken, child.mEmbeddedID, requestCode, 3850 ar.getResultCode(), ar.getResultData()); 3851 } 3852 } 3853 3854 /** 3855 * Same as calling {@link #startActivityFromFragment(Fragment, Intent, int, Bundle)} 3856 * with no options. 3857 * 3858 * @param fragment The fragment making the call. 3859 * @param intent The intent to start. 3860 * @param requestCode Reply request code. < 0 if reply is not requested. 3861 * 3862 * @throws android.content.ActivityNotFoundException 3863 * 3864 * @see Fragment#startActivity 3865 * @see Fragment#startActivityForResult 3866 */ 3867 public void startActivityFromFragment(Fragment fragment, Intent intent, 3868 int requestCode) { 3869 startActivityFromFragment(fragment, intent, requestCode, null); 3870 } 3871 3872 /** 3873 * This is called when a Fragment in this activity calls its 3874 * {@link Fragment#startActivity} or {@link Fragment#startActivityForResult} 3875 * method. 3876 * 3877 * <p>This method throws {@link android.content.ActivityNotFoundException} 3878 * if there was no Activity found to run the given Intent. 3879 * 3880 * @param fragment The fragment making the call. 3881 * @param intent The intent to start. 3882 * @param requestCode Reply request code. < 0 if reply is not requested. 3883 * @param options Additional options for how the Activity should be started. 3884 * See {@link android.content.Context#startActivity(Intent, Bundle) 3885 * Context.startActivity(Intent, Bundle)} for more details. 3886 * 3887 * @throws android.content.ActivityNotFoundException 3888 * 3889 * @see Fragment#startActivity 3890 * @see Fragment#startActivityForResult 3891 */ 3892 public void startActivityFromFragment(Fragment fragment, Intent intent, 3893 int requestCode, Bundle options) { 3894 Instrumentation.ActivityResult ar = 3895 mInstrumentation.execStartActivity( 3896 this, mMainThread.getApplicationThread(), mToken, fragment, 3897 intent, requestCode, options); 3898 if (ar != null) { 3899 mMainThread.sendActivityResult( 3900 mToken, fragment.mWho, requestCode, 3901 ar.getResultCode(), ar.getResultData()); 3902 } 3903 } 3904 3905 /** 3906 * Same as calling {@link #startIntentSenderFromChild(Activity, IntentSender, 3907 * int, Intent, int, int, int, Bundle)} with no options. 3908 */ 3909 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3910 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3911 int extraFlags) 3912 throws IntentSender.SendIntentException { 3913 startIntentSenderFromChild(child, intent, requestCode, fillInIntent, 3914 flagsMask, flagsValues, extraFlags, null); 3915 } 3916 3917 /** 3918 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3919 * taking a IntentSender; see 3920 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3921 * for more information. 3922 */ 3923 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3924 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3925 int extraFlags, Bundle options) 3926 throws IntentSender.SendIntentException { 3927 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3928 flagsMask, flagsValues, child, options); 3929 } 3930 3931 /** 3932 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3933 * or {@link #finish} to specify an explicit transition animation to 3934 * perform next. 3935 * 3936 * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN} an alternative 3937 * to using this with starting activities is to supply the desired animation 3938 * information through a {@link ActivityOptions} bundle to 3939 * {@link #startActivity(Intent, Bundle) or a related function. This allows 3940 * you to specify a custom animation even when starting an activity from 3941 * outside the context of the current top activity. 3942 * 3943 * @param enterAnim A resource ID of the animation resource to use for 3944 * the incoming activity. Use 0 for no animation. 3945 * @param exitAnim A resource ID of the animation resource to use for 3946 * the outgoing activity. Use 0 for no animation. 3947 */ 3948 public void overridePendingTransition(int enterAnim, int exitAnim) { 3949 try { 3950 ActivityManagerNative.getDefault().overridePendingTransition( 3951 mToken, getPackageName(), enterAnim, exitAnim); 3952 } catch (RemoteException e) { 3953 } 3954 } 3955 3956 /** 3957 * Call this to set the result that your activity will return to its 3958 * caller. 3959 * 3960 * @param resultCode The result code to propagate back to the originating 3961 * activity, often RESULT_CANCELED or RESULT_OK 3962 * 3963 * @see #RESULT_CANCELED 3964 * @see #RESULT_OK 3965 * @see #RESULT_FIRST_USER 3966 * @see #setResult(int, Intent) 3967 */ 3968 public final void setResult(int resultCode) { 3969 synchronized (this) { 3970 mResultCode = resultCode; 3971 mResultData = null; 3972 } 3973 } 3974 3975 /** 3976 * Call this to set the result that your activity will return to its 3977 * caller. 3978 * 3979 * <p>As of {@link android.os.Build.VERSION_CODES#GINGERBREAD}, the Intent 3980 * you supply here can have {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 3981 * Intent.FLAG_GRANT_READ_URI_PERMISSION} and/or {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 3982 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} set. This will grant the 3983 * Activity receiving the result access to the specific URIs in the Intent. 3984 * Access will remain until the Activity has finished (it will remain across the hosting 3985 * process being killed and other temporary destruction) and will be added 3986 * to any existing set of URI permissions it already holds. 3987 * 3988 * @param resultCode The result code to propagate back to the originating 3989 * activity, often RESULT_CANCELED or RESULT_OK 3990 * @param data The data to propagate back to the originating activity. 3991 * 3992 * @see #RESULT_CANCELED 3993 * @see #RESULT_OK 3994 * @see #RESULT_FIRST_USER 3995 * @see #setResult(int) 3996 */ 3997 public final void setResult(int resultCode, Intent data) { 3998 synchronized (this) { 3999 mResultCode = resultCode; 4000 mResultData = data; 4001 } 4002 } 4003 4004 /** 4005 * Return the name of the package that invoked this activity. This is who 4006 * the data in {@link #setResult setResult()} will be sent to. You can 4007 * use this information to validate that the recipient is allowed to 4008 * receive the data. 4009 * 4010 * <p>Note: if the calling activity is not expecting a result (that is it 4011 * did not use the {@link #startActivityForResult} 4012 * form that includes a request code), then the calling package will be 4013 * null. 4014 * 4015 * @return The package of the activity that will receive your 4016 * reply, or null if none. 4017 */ 4018 public String getCallingPackage() { 4019 try { 4020 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 4021 } catch (RemoteException e) { 4022 return null; 4023 } 4024 } 4025 4026 /** 4027 * Return the name of the activity that invoked this activity. This is 4028 * who the data in {@link #setResult setResult()} will be sent to. You 4029 * can use this information to validate that the recipient is allowed to 4030 * receive the data. 4031 * 4032 * <p>Note: if the calling activity is not expecting a result (that is it 4033 * did not use the {@link #startActivityForResult} 4034 * form that includes a request code), then the calling package will be 4035 * null. 4036 * 4037 * @return String The full name of the activity that will receive your 4038 * reply, or null if none. 4039 */ 4040 public ComponentName getCallingActivity() { 4041 try { 4042 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 4043 } catch (RemoteException e) { 4044 return null; 4045 } 4046 } 4047 4048 /** 4049 * Control whether this activity's main window is visible. This is intended 4050 * only for the special case of an activity that is not going to show a 4051 * UI itself, but can't just finish prior to onResume() because it needs 4052 * to wait for a service binding or such. Setting this to false allows 4053 * you to prevent your UI from being shown during that time. 4054 * 4055 * <p>The default value for this is taken from the 4056 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 4057 */ 4058 public void setVisible(boolean visible) { 4059 if (mVisibleFromClient != visible) { 4060 mVisibleFromClient = visible; 4061 if (mVisibleFromServer) { 4062 if (visible) makeVisible(); 4063 else mDecor.setVisibility(View.INVISIBLE); 4064 } 4065 } 4066 } 4067 4068 void makeVisible() { 4069 if (!mWindowAdded) { 4070 ViewManager wm = getWindowManager(); 4071 wm.addView(mDecor, getWindow().getAttributes()); 4072 mWindowAdded = true; 4073 } 4074 mDecor.setVisibility(View.VISIBLE); 4075 } 4076 4077 /** 4078 * Check to see whether this activity is in the process of finishing, 4079 * either because you called {@link #finish} on it or someone else 4080 * has requested that it finished. This is often used in 4081 * {@link #onPause} to determine whether the activity is simply pausing or 4082 * completely finishing. 4083 * 4084 * @return If the activity is finishing, returns true; else returns false. 4085 * 4086 * @see #finish 4087 */ 4088 public boolean isFinishing() { 4089 return mFinished; 4090 } 4091 4092 /** 4093 * Returns true if the final {@link #onDestroy()} call has been made 4094 * on the Activity, so this instance is now dead. 4095 */ 4096 public boolean isDestroyed() { 4097 return mDestroyed; 4098 } 4099 4100 /** 4101 * Check to see whether this activity is in the process of being destroyed in order to be 4102 * recreated with a new configuration. This is often used in 4103 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 4104 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 4105 * 4106 * @return If the activity is being torn down in order to be recreated with a new configuration, 4107 * returns true; else returns false. 4108 */ 4109 public boolean isChangingConfigurations() { 4110 return mChangingConfigurations; 4111 } 4112 4113 /** 4114 * Cause this Activity to be recreated with a new instance. This results 4115 * in essentially the same flow as when the Activity is created due to 4116 * a configuration change -- the current instance will go through its 4117 * lifecycle to {@link #onDestroy} and a new instance then created after it. 4118 */ 4119 public void recreate() { 4120 if (mParent != null) { 4121 throw new IllegalStateException("Can only be called on top-level activity"); 4122 } 4123 if (Looper.myLooper() != mMainThread.getLooper()) { 4124 throw new IllegalStateException("Must be called from main thread"); 4125 } 4126 mMainThread.requestRelaunchActivity(mToken, null, null, 0, false, null, false); 4127 } 4128 4129 /** 4130 * Call this when your activity is done and should be closed. The 4131 * ActivityResult is propagated back to whoever launched you via 4132 * onActivityResult(). 4133 */ 4134 public void finish() { 4135 if (mParent == null) { 4136 int resultCode; 4137 Intent resultData; 4138 synchronized (this) { 4139 resultCode = mResultCode; 4140 resultData = mResultData; 4141 } 4142 if (false) Log.v(TAG, "Finishing self: token=" + mToken); 4143 try { 4144 if (resultData != null) { 4145 resultData.setAllowFds(false); 4146 } 4147 if (ActivityManagerNative.getDefault() 4148 .finishActivity(mToken, resultCode, resultData)) { 4149 mFinished = true; 4150 } 4151 } catch (RemoteException e) { 4152 // Empty 4153 } 4154 } else { 4155 mParent.finishFromChild(this); 4156 } 4157 } 4158 4159 /** 4160 * Finish this activity as well as all activities immediately below it 4161 * in the current task that have the same affinity. This is typically 4162 * used when an application can be launched on to another task (such as 4163 * from an ACTION_VIEW of a content type it understands) and the user 4164 * has used the up navigation to switch out of the current task and in 4165 * to its own task. In this case, if the user has navigated down into 4166 * any other activities of the second application, all of those should 4167 * be removed from the original task as part of the task switch. 4168 * 4169 * <p>Note that this finish does <em>not</em> allow you to deliver results 4170 * to the previous activity, and an exception will be thrown if you are trying 4171 * to do so.</p> 4172 */ 4173 public void finishAffinity() { 4174 if (mParent != null) { 4175 throw new IllegalStateException("Can not be called from an embedded activity"); 4176 } 4177 if (mResultCode != RESULT_CANCELED || mResultData != null) { 4178 throw new IllegalStateException("Can not be called to deliver a result"); 4179 } 4180 try { 4181 if (ActivityManagerNative.getDefault().finishActivityAffinity(mToken)) { 4182 mFinished = true; 4183 } 4184 } catch (RemoteException e) { 4185 // Empty 4186 } 4187 } 4188 4189 /** 4190 * This is called when a child activity of this one calls its 4191 * {@link #finish} method. The default implementation simply calls 4192 * finish() on this activity (the parent), finishing the entire group. 4193 * 4194 * @param child The activity making the call. 4195 * 4196 * @see #finish 4197 */ 4198 public void finishFromChild(Activity child) { 4199 finish(); 4200 } 4201 4202 /** 4203 * Force finish another activity that you had previously started with 4204 * {@link #startActivityForResult}. 4205 * 4206 * @param requestCode The request code of the activity that you had 4207 * given to startActivityForResult(). If there are multiple 4208 * activities started with this request code, they 4209 * will all be finished. 4210 */ 4211 public void finishActivity(int requestCode) { 4212 if (mParent == null) { 4213 try { 4214 ActivityManagerNative.getDefault() 4215 .finishSubActivity(mToken, mEmbeddedID, requestCode); 4216 } catch (RemoteException e) { 4217 // Empty 4218 } 4219 } else { 4220 mParent.finishActivityFromChild(this, requestCode); 4221 } 4222 } 4223 4224 /** 4225 * This is called when a child activity of this one calls its 4226 * finishActivity(). 4227 * 4228 * @param child The activity making the call. 4229 * @param requestCode Request code that had been used to start the 4230 * activity. 4231 */ 4232 public void finishActivityFromChild(Activity child, int requestCode) { 4233 try { 4234 ActivityManagerNative.getDefault() 4235 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 4236 } catch (RemoteException e) { 4237 // Empty 4238 } 4239 } 4240 4241 /** 4242 * Called when an activity you launched exits, giving you the requestCode 4243 * you started it with, the resultCode it returned, and any additional 4244 * data from it. The <var>resultCode</var> will be 4245 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 4246 * didn't return any result, or crashed during its operation. 4247 * 4248 * <p>You will receive this call immediately before onResume() when your 4249 * activity is re-starting. 4250 * 4251 * @param requestCode The integer request code originally supplied to 4252 * startActivityForResult(), allowing you to identify who this 4253 * result came from. 4254 * @param resultCode The integer result code returned by the child activity 4255 * through its setResult(). 4256 * @param data An Intent, which can return result data to the caller 4257 * (various data can be attached to Intent "extras"). 4258 * 4259 * @see #startActivityForResult 4260 * @see #createPendingResult 4261 * @see #setResult(int) 4262 */ 4263 protected void onActivityResult(int requestCode, int resultCode, Intent data) { 4264 } 4265 4266 /** 4267 * Create a new PendingIntent object which you can hand to others 4268 * for them to use to send result data back to your 4269 * {@link #onActivityResult} callback. The created object will be either 4270 * one-shot (becoming invalid after a result is sent back) or multiple 4271 * (allowing any number of results to be sent through it). 4272 * 4273 * @param requestCode Private request code for the sender that will be 4274 * associated with the result data when it is returned. The sender can not 4275 * modify this value, allowing you to identify incoming results. 4276 * @param data Default data to supply in the result, which may be modified 4277 * by the sender. 4278 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 4279 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 4280 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 4281 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 4282 * or any of the flags as supported by 4283 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 4284 * of the intent that can be supplied when the actual send happens. 4285 * 4286 * @return Returns an existing or new PendingIntent matching the given 4287 * parameters. May return null only if 4288 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 4289 * supplied. 4290 * 4291 * @see PendingIntent 4292 */ 4293 public PendingIntent createPendingResult(int requestCode, Intent data, 4294 int flags) { 4295 String packageName = getPackageName(); 4296 try { 4297 data.setAllowFds(false); 4298 IIntentSender target = 4299 ActivityManagerNative.getDefault().getIntentSender( 4300 ActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 4301 mParent == null ? mToken : mParent.mToken, 4302 mEmbeddedID, requestCode, new Intent[] { data }, null, flags, null, 4303 UserHandle.myUserId()); 4304 return target != null ? new PendingIntent(target) : null; 4305 } catch (RemoteException e) { 4306 // Empty 4307 } 4308 return null; 4309 } 4310 4311 /** 4312 * Change the desired orientation of this activity. If the activity 4313 * is currently in the foreground or otherwise impacting the screen 4314 * orientation, the screen will immediately be changed (possibly causing 4315 * the activity to be restarted). Otherwise, this will be used the next 4316 * time the activity is visible. 4317 * 4318 * @param requestedOrientation An orientation constant as used in 4319 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 4320 */ 4321 public void setRequestedOrientation(int requestedOrientation) { 4322 if (mParent == null) { 4323 try { 4324 ActivityManagerNative.getDefault().setRequestedOrientation( 4325 mToken, requestedOrientation); 4326 } catch (RemoteException e) { 4327 // Empty 4328 } 4329 } else { 4330 mParent.setRequestedOrientation(requestedOrientation); 4331 } 4332 } 4333 4334 /** 4335 * Return the current requested orientation of the activity. This will 4336 * either be the orientation requested in its component's manifest, or 4337 * the last requested orientation given to 4338 * {@link #setRequestedOrientation(int)}. 4339 * 4340 * @return Returns an orientation constant as used in 4341 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 4342 */ 4343 public int getRequestedOrientation() { 4344 if (mParent == null) { 4345 try { 4346 return ActivityManagerNative.getDefault() 4347 .getRequestedOrientation(mToken); 4348 } catch (RemoteException e) { 4349 // Empty 4350 } 4351 } else { 4352 return mParent.getRequestedOrientation(); 4353 } 4354 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 4355 } 4356 4357 /** 4358 * Return the identifier of the task this activity is in. This identifier 4359 * will remain the same for the lifetime of the activity. 4360 * 4361 * @return Task identifier, an opaque integer. 4362 */ 4363 public int getTaskId() { 4364 try { 4365 return ActivityManagerNative.getDefault() 4366 .getTaskForActivity(mToken, false); 4367 } catch (RemoteException e) { 4368 return -1; 4369 } 4370 } 4371 4372 /** 4373 * Return whether this activity is the root of a task. The root is the 4374 * first activity in a task. 4375 * 4376 * @return True if this is the root activity, else false. 4377 */ 4378 public boolean isTaskRoot() { 4379 try { 4380 return ActivityManagerNative.getDefault() 4381 .getTaskForActivity(mToken, true) >= 0; 4382 } catch (RemoteException e) { 4383 return false; 4384 } 4385 } 4386 4387 /** 4388 * Move the task containing this activity to the back of the activity 4389 * stack. The activity's order within the task is unchanged. 4390 * 4391 * @param nonRoot If false then this only works if the activity is the root 4392 * of a task; if true it will work for any activity in 4393 * a task. 4394 * 4395 * @return If the task was moved (or it was already at the 4396 * back) true is returned, else false. 4397 */ 4398 public boolean moveTaskToBack(boolean nonRoot) { 4399 try { 4400 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 4401 mToken, nonRoot); 4402 } catch (RemoteException e) { 4403 // Empty 4404 } 4405 return false; 4406 } 4407 4408 /** 4409 * Returns class name for this activity with the package prefix removed. 4410 * This is the default name used to read and write settings. 4411 * 4412 * @return The local class name. 4413 */ 4414 public String getLocalClassName() { 4415 final String pkg = getPackageName(); 4416 final String cls = mComponent.getClassName(); 4417 int packageLen = pkg.length(); 4418 if (!cls.startsWith(pkg) || cls.length() <= packageLen 4419 || cls.charAt(packageLen) != '.') { 4420 return cls; 4421 } 4422 return cls.substring(packageLen+1); 4423 } 4424 4425 /** 4426 * Returns complete component name of this activity. 4427 * 4428 * @return Returns the complete component name for this activity 4429 */ 4430 public ComponentName getComponentName() 4431 { 4432 return mComponent; 4433 } 4434 4435 /** 4436 * Retrieve a {@link SharedPreferences} object for accessing preferences 4437 * that are private to this activity. This simply calls the underlying 4438 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 4439 * class name as the preferences name. 4440 * 4441 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 4442 * operation, {@link #MODE_WORLD_READABLE} and 4443 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 4444 * 4445 * @return Returns the single SharedPreferences instance that can be used 4446 * to retrieve and modify the preference values. 4447 */ 4448 public SharedPreferences getPreferences(int mode) { 4449 return getSharedPreferences(getLocalClassName(), mode); 4450 } 4451 4452 private void ensureSearchManager() { 4453 if (mSearchManager != null) { 4454 return; 4455 } 4456 4457 mSearchManager = new SearchManager(this, null); 4458 } 4459 4460 @Override 4461 public Object getSystemService(String name) { 4462 if (getBaseContext() == null) { 4463 throw new IllegalStateException( 4464 "System services not available to Activities before onCreate()"); 4465 } 4466 4467 if (WINDOW_SERVICE.equals(name)) { 4468 return mWindowManager; 4469 } else if (SEARCH_SERVICE.equals(name)) { 4470 ensureSearchManager(); 4471 return mSearchManager; 4472 } 4473 return super.getSystemService(name); 4474 } 4475 4476 /** 4477 * Change the title associated with this activity. If this is a 4478 * top-level activity, the title for its window will change. If it 4479 * is an embedded activity, the parent can do whatever it wants 4480 * with it. 4481 */ 4482 public void setTitle(CharSequence title) { 4483 mTitle = title; 4484 onTitleChanged(title, mTitleColor); 4485 4486 if (mParent != null) { 4487 mParent.onChildTitleChanged(this, title); 4488 } 4489 } 4490 4491 /** 4492 * Change the title associated with this activity. If this is a 4493 * top-level activity, the title for its window will change. If it 4494 * is an embedded activity, the parent can do whatever it wants 4495 * with it. 4496 */ 4497 public void setTitle(int titleId) { 4498 setTitle(getText(titleId)); 4499 } 4500 4501 public void setTitleColor(int textColor) { 4502 mTitleColor = textColor; 4503 onTitleChanged(mTitle, textColor); 4504 } 4505 4506 public final CharSequence getTitle() { 4507 return mTitle; 4508 } 4509 4510 public final int getTitleColor() { 4511 return mTitleColor; 4512 } 4513 4514 protected void onTitleChanged(CharSequence title, int color) { 4515 if (mTitleReady) { 4516 final Window win = getWindow(); 4517 if (win != null) { 4518 win.setTitle(title); 4519 if (color != 0) { 4520 win.setTitleColor(color); 4521 } 4522 } 4523 } 4524 } 4525 4526 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 4527 } 4528 4529 /** 4530 * Sets the visibility of the progress bar in the title. 4531 * <p> 4532 * In order for the progress bar to be shown, the feature must be requested 4533 * via {@link #requestWindowFeature(int)}. 4534 * 4535 * @param visible Whether to show the progress bars in the title. 4536 */ 4537 public final void setProgressBarVisibility(boolean visible) { 4538 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 4539 Window.PROGRESS_VISIBILITY_OFF); 4540 } 4541 4542 /** 4543 * Sets the visibility of the indeterminate progress bar in the title. 4544 * <p> 4545 * In order for the progress bar to be shown, the feature must be requested 4546 * via {@link #requestWindowFeature(int)}. 4547 * 4548 * @param visible Whether to show the progress bars in the title. 4549 */ 4550 public final void setProgressBarIndeterminateVisibility(boolean visible) { 4551 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 4552 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 4553 } 4554 4555 /** 4556 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 4557 * is always indeterminate). 4558 * <p> 4559 * In order for the progress bar to be shown, the feature must be requested 4560 * via {@link #requestWindowFeature(int)}. 4561 * 4562 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 4563 */ 4564 public final void setProgressBarIndeterminate(boolean indeterminate) { 4565 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4566 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 4567 } 4568 4569 /** 4570 * Sets the progress for the progress bars in the title. 4571 * <p> 4572 * In order for the progress bar to be shown, the feature must be requested 4573 * via {@link #requestWindowFeature(int)}. 4574 * 4575 * @param progress The progress for the progress bar. Valid ranges are from 4576 * 0 to 10000 (both inclusive). If 10000 is given, the progress 4577 * bar will be completely filled and will fade out. 4578 */ 4579 public final void setProgress(int progress) { 4580 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 4581 } 4582 4583 /** 4584 * Sets the secondary progress for the progress bar in the title. This 4585 * progress is drawn between the primary progress (set via 4586 * {@link #setProgress(int)} and the background. It can be ideal for media 4587 * scenarios such as showing the buffering progress while the default 4588 * progress shows the play progress. 4589 * <p> 4590 * In order for the progress bar to be shown, the feature must be requested 4591 * via {@link #requestWindowFeature(int)}. 4592 * 4593 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 4594 * 0 to 10000 (both inclusive). 4595 */ 4596 public final void setSecondaryProgress(int secondaryProgress) { 4597 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 4598 secondaryProgress + Window.PROGRESS_SECONDARY_START); 4599 } 4600 4601 /** 4602 * Suggests an audio stream whose volume should be changed by the hardware 4603 * volume controls. 4604 * <p> 4605 * The suggested audio stream will be tied to the window of this Activity. 4606 * If the Activity is switched, the stream set here is no longer the 4607 * suggested stream. The client does not need to save and restore the old 4608 * suggested stream value in onPause and onResume. 4609 * 4610 * @param streamType The type of the audio stream whose volume should be 4611 * changed by the hardware volume controls. It is not guaranteed that 4612 * the hardware volume controls will always change this stream's 4613 * volume (for example, if a call is in progress, its stream's volume 4614 * may be changed instead). To reset back to the default, use 4615 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 4616 */ 4617 public final void setVolumeControlStream(int streamType) { 4618 getWindow().setVolumeControlStream(streamType); 4619 } 4620 4621 /** 4622 * Gets the suggested audio stream whose volume should be changed by the 4623 * harwdare volume controls. 4624 * 4625 * @return The suggested audio stream type whose volume should be changed by 4626 * the hardware volume controls. 4627 * @see #setVolumeControlStream(int) 4628 */ 4629 public final int getVolumeControlStream() { 4630 return getWindow().getVolumeControlStream(); 4631 } 4632 4633 /** 4634 * Runs the specified action on the UI thread. If the current thread is the UI 4635 * thread, then the action is executed immediately. If the current thread is 4636 * not the UI thread, the action is posted to the event queue of the UI thread. 4637 * 4638 * @param action the action to run on the UI thread 4639 */ 4640 public final void runOnUiThread(Runnable action) { 4641 if (Thread.currentThread() != mUiThread) { 4642 mHandler.post(action); 4643 } else { 4644 action.run(); 4645 } 4646 } 4647 4648 /** 4649 * Standard implementation of 4650 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 4651 * inflating with the LayoutInflater returned by {@link #getSystemService}. 4652 * This implementation does nothing and is for 4653 * pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} apps. Newer apps 4654 * should use {@link #onCreateView(View, String, Context, AttributeSet)}. 4655 * 4656 * @see android.view.LayoutInflater#createView 4657 * @see android.view.Window#getLayoutInflater 4658 */ 4659 public View onCreateView(String name, Context context, AttributeSet attrs) { 4660 return null; 4661 } 4662 4663 /** 4664 * Standard implementation of 4665 * {@link android.view.LayoutInflater.Factory2#onCreateView(View, String, Context, AttributeSet)} 4666 * used when inflating with the LayoutInflater returned by {@link #getSystemService}. 4667 * This implementation handles <fragment> tags to embed fragments inside 4668 * of the activity. 4669 * 4670 * @see android.view.LayoutInflater#createView 4671 * @see android.view.Window#getLayoutInflater 4672 */ 4673 public View onCreateView(View parent, String name, Context context, AttributeSet attrs) { 4674 if (!"fragment".equals(name)) { 4675 return onCreateView(name, context, attrs); 4676 } 4677 4678 String fname = attrs.getAttributeValue(null, "class"); 4679 TypedArray a = 4680 context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Fragment); 4681 if (fname == null) { 4682 fname = a.getString(com.android.internal.R.styleable.Fragment_name); 4683 } 4684 int id = a.getResourceId(com.android.internal.R.styleable.Fragment_id, View.NO_ID); 4685 String tag = a.getString(com.android.internal.R.styleable.Fragment_tag); 4686 a.recycle(); 4687 4688 int containerId = parent != null ? parent.getId() : 0; 4689 if (containerId == View.NO_ID && id == View.NO_ID && tag == null) { 4690 throw new IllegalArgumentException(attrs.getPositionDescription() 4691 + ": Must specify unique android:id, android:tag, or have a parent with an id for " + fname); 4692 } 4693 4694 // If we restored from a previous state, we may already have 4695 // instantiated this fragment from the state and should use 4696 // that instance instead of making a new one. 4697 Fragment fragment = id != View.NO_ID ? mFragments.findFragmentById(id) : null; 4698 if (fragment == null && tag != null) { 4699 fragment = mFragments.findFragmentByTag(tag); 4700 } 4701 if (fragment == null && containerId != View.NO_ID) { 4702 fragment = mFragments.findFragmentById(containerId); 4703 } 4704 4705 if (FragmentManagerImpl.DEBUG) Log.v(TAG, "onCreateView: id=0x" 4706 + Integer.toHexString(id) + " fname=" + fname 4707 + " existing=" + fragment); 4708 if (fragment == null) { 4709 fragment = Fragment.instantiate(this, fname); 4710 fragment.mFromLayout = true; 4711 fragment.mFragmentId = id != 0 ? id : containerId; 4712 fragment.mContainerId = containerId; 4713 fragment.mTag = tag; 4714 fragment.mInLayout = true; 4715 fragment.mFragmentManager = mFragments; 4716 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4717 mFragments.addFragment(fragment, true); 4718 4719 } else if (fragment.mInLayout) { 4720 // A fragment already exists and it is not one we restored from 4721 // previous state. 4722 throw new IllegalArgumentException(attrs.getPositionDescription() 4723 + ": Duplicate id 0x" + Integer.toHexString(id) 4724 + ", tag " + tag + ", or parent id 0x" + Integer.toHexString(containerId) 4725 + " with another fragment for " + fname); 4726 } else { 4727 // This fragment was retained from a previous instance; get it 4728 // going now. 4729 fragment.mInLayout = true; 4730 // If this fragment is newly instantiated (either right now, or 4731 // from last saved state), then give it the attributes to 4732 // initialize itself. 4733 if (!fragment.mRetaining) { 4734 fragment.onInflate(this, attrs, fragment.mSavedFragmentState); 4735 } 4736 mFragments.moveToState(fragment); 4737 } 4738 4739 if (fragment.mView == null) { 4740 throw new IllegalStateException("Fragment " + fname 4741 + " did not create a view."); 4742 } 4743 if (id != 0) { 4744 fragment.mView.setId(id); 4745 } 4746 if (fragment.mView.getTag() == null) { 4747 fragment.mView.setTag(tag); 4748 } 4749 return fragment.mView; 4750 } 4751 4752 /** 4753 * Print the Activity's state into the given stream. This gets invoked if 4754 * you run "adb shell dumpsys activity <activity_component_name>". 4755 * 4756 * @param prefix Desired prefix to prepend at each line of output. 4757 * @param fd The raw file descriptor that the dump is being sent to. 4758 * @param writer The PrintWriter to which you should dump your state. This will be 4759 * closed for you after you return. 4760 * @param args additional arguments to the dump request. 4761 */ 4762 public void dump(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4763 dumpInner(prefix, fd, writer, args); 4764 } 4765 4766 void dumpInner(String prefix, FileDescriptor fd, PrintWriter writer, String[] args) { 4767 writer.print(prefix); writer.print("Local Activity "); 4768 writer.print(Integer.toHexString(System.identityHashCode(this))); 4769 writer.println(" State:"); 4770 String innerPrefix = prefix + " "; 4771 writer.print(innerPrefix); writer.print("mResumed="); 4772 writer.print(mResumed); writer.print(" mStopped="); 4773 writer.print(mStopped); writer.print(" mFinished="); 4774 writer.println(mFinished); 4775 writer.print(innerPrefix); writer.print("mLoadersStarted="); 4776 writer.println(mLoadersStarted); 4777 writer.print(innerPrefix); writer.print("mChangingConfigurations="); 4778 writer.println(mChangingConfigurations); 4779 writer.print(innerPrefix); writer.print("mCurrentConfig="); 4780 writer.println(mCurrentConfig); 4781 if (mLoaderManager != null) { 4782 writer.print(prefix); writer.print("Loader Manager "); 4783 writer.print(Integer.toHexString(System.identityHashCode(mLoaderManager))); 4784 writer.println(":"); 4785 mLoaderManager.dump(prefix + " ", fd, writer, args); 4786 } 4787 mFragments.dump(prefix, fd, writer, args); 4788 writer.print(prefix); writer.println("View Hierarchy:"); 4789 dumpViewHierarchy(prefix + " ", writer, getWindow().getDecorView()); 4790 } 4791 4792 private void dumpViewHierarchy(String prefix, PrintWriter writer, View view) { 4793 writer.print(prefix); 4794 if (view == null) { 4795 writer.println("null"); 4796 return; 4797 } 4798 writer.println(view.toString()); 4799 if (!(view instanceof ViewGroup)) { 4800 return; 4801 } 4802 ViewGroup grp = (ViewGroup)view; 4803 final int N = grp.getChildCount(); 4804 if (N <= 0) { 4805 return; 4806 } 4807 prefix = prefix + " "; 4808 for (int i=0; i<N; i++) { 4809 dumpViewHierarchy(prefix, writer, grp.getChildAt(i)); 4810 } 4811 } 4812 4813 /** 4814 * Bit indicating that this activity is "immersive" and should not be 4815 * interrupted by notifications if possible. 4816 * 4817 * This value is initially set by the manifest property 4818 * <code>android:immersive</code> but may be changed at runtime by 4819 * {@link #setImmersive}. 4820 * 4821 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4822 * @hide 4823 */ 4824 public boolean isImmersive() { 4825 try { 4826 return ActivityManagerNative.getDefault().isImmersive(mToken); 4827 } catch (RemoteException e) { 4828 return false; 4829 } 4830 } 4831 4832 /** 4833 * Adjust the current immersive mode setting. 4834 * 4835 * Note that changing this value will have no effect on the activity's 4836 * {@link android.content.pm.ActivityInfo} structure; that is, if 4837 * <code>android:immersive</code> is set to <code>true</code> 4838 * in the application's manifest entry for this activity, the {@link 4839 * android.content.pm.ActivityInfo#flags ActivityInfo.flags} member will 4840 * always have its {@link android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4841 * FLAG_IMMERSIVE} bit set. 4842 * 4843 * @see #isImmersive 4844 * @see android.content.pm.ActivityInfo#FLAG_IMMERSIVE 4845 * @hide 4846 */ 4847 public void setImmersive(boolean i) { 4848 try { 4849 ActivityManagerNative.getDefault().setImmersive(mToken, i); 4850 } catch (RemoteException e) { 4851 // pass 4852 } 4853 } 4854 4855 /** 4856 * Start an action mode. 4857 * 4858 * @param callback Callback that will manage lifecycle events for this context mode 4859 * @return The ContextMode that was started, or null if it was canceled 4860 * 4861 * @see ActionMode 4862 */ 4863 public ActionMode startActionMode(ActionMode.Callback callback) { 4864 return mWindow.getDecorView().startActionMode(callback); 4865 } 4866 4867 /** 4868 * Give the Activity a chance to control the UI for an action mode requested 4869 * by the system. 4870 * 4871 * <p>Note: If you are looking for a notification callback that an action mode 4872 * has been started for this activity, see {@link #onActionModeStarted(ActionMode)}.</p> 4873 * 4874 * @param callback The callback that should control the new action mode 4875 * @return The new action mode, or <code>null</code> if the activity does not want to 4876 * provide special handling for this action mode. (It will be handled by the system.) 4877 */ 4878 public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) { 4879 initActionBar(); 4880 if (mActionBar != null) { 4881 return mActionBar.startActionMode(callback); 4882 } 4883 return null; 4884 } 4885 4886 /** 4887 * Notifies the Activity that an action mode has been started. 4888 * Activity subclasses overriding this method should call the superclass implementation. 4889 * 4890 * @param mode The new action mode. 4891 */ 4892 public void onActionModeStarted(ActionMode mode) { 4893 } 4894 4895 /** 4896 * Notifies the activity that an action mode has finished. 4897 * Activity subclasses overriding this method should call the superclass implementation. 4898 * 4899 * @param mode The action mode that just finished. 4900 */ 4901 public void onActionModeFinished(ActionMode mode) { 4902 } 4903 4904 /** 4905 * Returns true if the app should recreate the task when navigating 'up' from this activity 4906 * by using targetIntent. 4907 * 4908 * <p>If this method returns false the app can trivially call 4909 * {@link #navigateUpTo(Intent)} using the same parameters to correctly perform 4910 * up navigation. If this method returns false, the app should synthesize a new task stack 4911 * by using {@link TaskStackBuilder} or another similar mechanism to perform up navigation.</p> 4912 * 4913 * @param targetIntent An intent representing the target destination for up navigation 4914 * @return true if navigating up should recreate a new task stack, false if the same task 4915 * should be used for the destination 4916 */ 4917 public boolean shouldUpRecreateTask(Intent targetIntent) { 4918 try { 4919 PackageManager pm = getPackageManager(); 4920 ComponentName cn = targetIntent.getComponent(); 4921 if (cn == null) { 4922 cn = targetIntent.resolveActivity(pm); 4923 } 4924 ActivityInfo info = pm.getActivityInfo(cn, 0); 4925 if (info.taskAffinity == null) { 4926 return false; 4927 } 4928 return !ActivityManagerNative.getDefault() 4929 .targetTaskAffinityMatchesActivity(mToken, info.taskAffinity); 4930 } catch (RemoteException e) { 4931 return false; 4932 } catch (NameNotFoundException e) { 4933 return false; 4934 } 4935 } 4936 4937 /** 4938 * Navigate from this activity to the activity specified by upIntent, finishing this activity 4939 * in the process. If the activity indicated by upIntent already exists in the task's history, 4940 * this activity and all others before the indicated activity in the history stack will be 4941 * finished. 4942 * 4943 * <p>If the indicated activity does not appear in the history stack, this will finish 4944 * each activity in this task until the root activity of the task is reached, resulting in 4945 * an "in-app home" behavior. This can be useful in apps with a complex navigation hierarchy 4946 * when an activity may be reached by a path not passing through a canonical parent 4947 * activity.</p> 4948 * 4949 * <p>This method should be used when performing up navigation from within the same task 4950 * as the destination. If up navigation should cross tasks in some cases, see 4951 * {@link #shouldUpRecreateTask(Intent)}.</p> 4952 * 4953 * @param upIntent An intent representing the target destination for up navigation 4954 * 4955 * @return true if up navigation successfully reached the activity indicated by upIntent and 4956 * upIntent was delivered to it. false if an instance of the indicated activity could 4957 * not be found and this activity was simply finished normally. 4958 */ 4959 public boolean navigateUpTo(Intent upIntent) { 4960 if (mParent == null) { 4961 ComponentName destInfo = upIntent.getComponent(); 4962 if (destInfo == null) { 4963 destInfo = upIntent.resolveActivity(getPackageManager()); 4964 if (destInfo == null) { 4965 return false; 4966 } 4967 upIntent = new Intent(upIntent); 4968 upIntent.setComponent(destInfo); 4969 } 4970 int resultCode; 4971 Intent resultData; 4972 synchronized (this) { 4973 resultCode = mResultCode; 4974 resultData = mResultData; 4975 } 4976 if (resultData != null) { 4977 resultData.setAllowFds(false); 4978 } 4979 try { 4980 return ActivityManagerNative.getDefault().navigateUpTo(mToken, upIntent, 4981 resultCode, resultData); 4982 } catch (RemoteException e) { 4983 return false; 4984 } 4985 } else { 4986 return mParent.navigateUpToFromChild(this, upIntent); 4987 } 4988 } 4989 4990 /** 4991 * This is called when a child activity of this one calls its 4992 * {@link #navigateUpTo} method. The default implementation simply calls 4993 * navigateUpTo(upIntent) on this activity (the parent). 4994 * 4995 * @param child The activity making the call. 4996 * @param upIntent An intent representing the target destination for up navigation 4997 * 4998 * @return true if up navigation successfully reached the activity indicated by upIntent and 4999 * upIntent was delivered to it. false if an instance of the indicated activity could 5000 * not be found and this activity was simply finished normally. 5001 */ 5002 public boolean navigateUpToFromChild(Activity child, Intent upIntent) { 5003 return navigateUpTo(upIntent); 5004 } 5005 5006 /** 5007 * Obtain an {@link Intent} that will launch an explicit target activity specified by 5008 * this activity's logical parent. The logical parent is named in the application's manifest 5009 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute. 5010 * Activity subclasses may override this method to modify the Intent returned by 5011 * super.getParentActivityIntent() or to implement a different mechanism of retrieving 5012 * the parent intent entirely. 5013 * 5014 * @return a new Intent targeting the defined parent of this activity or null if 5015 * there is no valid parent. 5016 */ 5017 public Intent getParentActivityIntent() { 5018 final String parentName = mActivityInfo.parentActivityName; 5019 if (TextUtils.isEmpty(parentName)) { 5020 return null; 5021 } 5022 5023 // If the parent itself has no parent, generate a main activity intent. 5024 final ComponentName target = new ComponentName(this, parentName); 5025 try { 5026 final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0); 5027 final String parentActivity = parentInfo.parentActivityName; 5028 final Intent parentIntent = parentActivity == null 5029 ? Intent.makeMainActivity(target) 5030 : new Intent().setComponent(target); 5031 return parentIntent; 5032 } catch (NameNotFoundException e) { 5033 Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName + 5034 "' in manifest"); 5035 return null; 5036 } 5037 } 5038 5039 // ------------------ Internal API ------------------ 5040 5041 final void setParent(Activity parent) { 5042 mParent = parent; 5043 } 5044 5045 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 5046 Application application, Intent intent, ActivityInfo info, CharSequence title, 5047 Activity parent, String id, NonConfigurationInstances lastNonConfigurationInstances, 5048 Configuration config) { 5049 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 5050 lastNonConfigurationInstances, config); 5051 } 5052 5053 final void attach(Context context, ActivityThread aThread, 5054 Instrumentation instr, IBinder token, int ident, 5055 Application application, Intent intent, ActivityInfo info, 5056 CharSequence title, Activity parent, String id, 5057 NonConfigurationInstances lastNonConfigurationInstances, 5058 Configuration config) { 5059 attachBaseContext(context); 5060 5061 mFragments.attachActivity(this, mContainer, null); 5062 5063 mWindow = PolicyManager.makeNewWindow(this); 5064 mWindow.setCallback(this); 5065 mWindow.getLayoutInflater().setPrivateFactory(this); 5066 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 5067 mWindow.setSoftInputMode(info.softInputMode); 5068 } 5069 if (info.uiOptions != 0) { 5070 mWindow.setUiOptions(info.uiOptions); 5071 } 5072 mUiThread = Thread.currentThread(); 5073 5074 mMainThread = aThread; 5075 mInstrumentation = instr; 5076 mToken = token; 5077 mIdent = ident; 5078 mApplication = application; 5079 mIntent = intent; 5080 mComponent = intent.getComponent(); 5081 mActivityInfo = info; 5082 mTitle = title; 5083 mParent = parent; 5084 mEmbeddedID = id; 5085 mLastNonConfigurationInstances = lastNonConfigurationInstances; 5086 5087 mWindow.setWindowManager( 5088 (WindowManager)context.getSystemService(Context.WINDOW_SERVICE), 5089 mToken, mComponent.flattenToString(), 5090 (info.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0); 5091 if (mParent != null) { 5092 mWindow.setContainer(mParent.getWindow()); 5093 } 5094 mWindowManager = mWindow.getWindowManager(); 5095 mCurrentConfig = config; 5096 } 5097 5098 /** @hide */ 5099 public final IBinder getActivityToken() { 5100 return mParent != null ? mParent.getActivityToken() : mToken; 5101 } 5102 5103 final void performCreate(Bundle icicle) { 5104 onCreate(icicle); 5105 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 5106 com.android.internal.R.styleable.Window_windowNoDisplay, false); 5107 mFragments.dispatchActivityCreated(); 5108 } 5109 5110 final void performStart() { 5111 mFragments.noteStateNotSaved(); 5112 mCalled = false; 5113 mFragments.execPendingActions(); 5114 mInstrumentation.callActivityOnStart(this); 5115 if (!mCalled) { 5116 throw new SuperNotCalledException( 5117 "Activity " + mComponent.toShortString() + 5118 " did not call through to super.onStart()"); 5119 } 5120 mFragments.dispatchStart(); 5121 if (mAllLoaderManagers != null) { 5122 LoaderManagerImpl loaders[] = new LoaderManagerImpl[mAllLoaderManagers.size()]; 5123 mAllLoaderManagers.values().toArray(loaders); 5124 if (loaders != null) { 5125 for (int i=0; i<loaders.length; i++) { 5126 LoaderManagerImpl lm = loaders[i]; 5127 lm.finishRetain(); 5128 lm.doReportStart(); 5129 } 5130 } 5131 } 5132 } 5133 5134 final void performRestart() { 5135 mFragments.noteStateNotSaved(); 5136 5137 if (mStopped) { 5138 mStopped = false; 5139 if (mToken != null && mParent == null) { 5140 WindowManagerGlobal.getInstance().setStoppedState(mToken, false); 5141 } 5142 5143 synchronized (mManagedCursors) { 5144 final int N = mManagedCursors.size(); 5145 for (int i=0; i<N; i++) { 5146 ManagedCursor mc = mManagedCursors.get(i); 5147 if (mc.mReleased || mc.mUpdated) { 5148 if (!mc.mCursor.requery()) { 5149 if (getApplicationInfo().targetSdkVersion 5150 >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 5151 throw new IllegalStateException( 5152 "trying to requery an already closed cursor " 5153 + mc.mCursor); 5154 } 5155 } 5156 mc.mReleased = false; 5157 mc.mUpdated = false; 5158 } 5159 } 5160 } 5161 5162 mCalled = false; 5163 mInstrumentation.callActivityOnRestart(this); 5164 if (!mCalled) { 5165 throw new SuperNotCalledException( 5166 "Activity " + mComponent.toShortString() + 5167 " did not call through to super.onRestart()"); 5168 } 5169 performStart(); 5170 } 5171 } 5172 5173 final void performResume() { 5174 performRestart(); 5175 5176 mFragments.execPendingActions(); 5177 5178 mLastNonConfigurationInstances = null; 5179 5180 mCalled = false; 5181 // mResumed is set by the instrumentation 5182 mInstrumentation.callActivityOnResume(this); 5183 if (!mCalled) { 5184 throw new SuperNotCalledException( 5185 "Activity " + mComponent.toShortString() + 5186 " did not call through to super.onResume()"); 5187 } 5188 5189 // Now really resume, and install the current status bar and menu. 5190 mCalled = false; 5191 5192 mFragments.dispatchResume(); 5193 mFragments.execPendingActions(); 5194 5195 onPostResume(); 5196 if (!mCalled) { 5197 throw new SuperNotCalledException( 5198 "Activity " + mComponent.toShortString() + 5199 " did not call through to super.onPostResume()"); 5200 } 5201 } 5202 5203 final void performPause() { 5204 mFragments.dispatchPause(); 5205 mCalled = false; 5206 onPause(); 5207 mResumed = false; 5208 if (!mCalled && getApplicationInfo().targetSdkVersion 5209 >= android.os.Build.VERSION_CODES.GINGERBREAD) { 5210 throw new SuperNotCalledException( 5211 "Activity " + mComponent.toShortString() + 5212 " did not call through to super.onPause()"); 5213 } 5214 mResumed = false; 5215 } 5216 5217 final void performUserLeaving() { 5218 onUserInteraction(); 5219 onUserLeaveHint(); 5220 } 5221 5222 final void performStop() { 5223 if (mLoadersStarted) { 5224 mLoadersStarted = false; 5225 if (mLoaderManager != null) { 5226 if (!mChangingConfigurations) { 5227 mLoaderManager.doStop(); 5228 } else { 5229 mLoaderManager.doRetain(); 5230 } 5231 } 5232 } 5233 5234 if (!mStopped) { 5235 if (mWindow != null) { 5236 mWindow.closeAllPanels(); 5237 } 5238 5239 if (mToken != null && mParent == null) { 5240 WindowManagerGlobal.getInstance().setStoppedState(mToken, true); 5241 } 5242 5243 mFragments.dispatchStop(); 5244 5245 mCalled = false; 5246 mInstrumentation.callActivityOnStop(this); 5247 if (!mCalled) { 5248 throw new SuperNotCalledException( 5249 "Activity " + mComponent.toShortString() + 5250 " did not call through to super.onStop()"); 5251 } 5252 5253 synchronized (mManagedCursors) { 5254 final int N = mManagedCursors.size(); 5255 for (int i=0; i<N; i++) { 5256 ManagedCursor mc = mManagedCursors.get(i); 5257 if (!mc.mReleased) { 5258 mc.mCursor.deactivate(); 5259 mc.mReleased = true; 5260 } 5261 } 5262 } 5263 5264 mStopped = true; 5265 } 5266 mResumed = false; 5267 } 5268 5269 final void performDestroy() { 5270 mDestroyed = true; 5271 mWindow.destroy(); 5272 mFragments.dispatchDestroy(); 5273 onDestroy(); 5274 if (mLoaderManager != null) { 5275 mLoaderManager.doDestroy(); 5276 } 5277 } 5278 5279 /** 5280 * @hide 5281 */ 5282 public final boolean isResumed() { 5283 return mResumed; 5284 } 5285 5286 void dispatchActivityResult(String who, int requestCode, 5287 int resultCode, Intent data) { 5288 if (false) Log.v( 5289 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 5290 + ", resCode=" + resultCode + ", data=" + data); 5291 mFragments.noteStateNotSaved(); 5292 if (who == null) { 5293 onActivityResult(requestCode, resultCode, data); 5294 } else { 5295 Fragment frag = mFragments.findFragmentByWho(who); 5296 if (frag != null) { 5297 frag.onActivityResult(requestCode, resultCode, data); 5298 } 5299 } 5300 } 5301} 5302