Activity.java revision 33b974393b6fadcefc896ec4a0f9b66724f61e9f
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 java.lang.reflect.Constructor; 20import java.util.ArrayList; 21import java.util.HashMap; 22 23import android.content.ComponentCallbacks; 24import android.content.ComponentName; 25import android.content.ContentResolver; 26import android.content.Context; 27import android.content.IIntentSender; 28import android.content.Intent; 29import android.content.IntentSender; 30import android.content.SharedPreferences; 31import android.content.pm.ActivityInfo; 32import android.content.res.Configuration; 33import android.content.res.Resources; 34import android.content.res.TypedArray; 35import android.database.Cursor; 36import android.graphics.Bitmap; 37import android.graphics.Canvas; 38import android.graphics.drawable.Drawable; 39import android.media.AudioManager; 40import android.net.Uri; 41import android.os.Build; 42import android.os.Bundle; 43import android.os.Handler; 44import android.os.IBinder; 45import android.os.RemoteException; 46import android.text.Selection; 47import android.text.SpannableStringBuilder; 48import android.text.TextUtils; 49import android.text.method.TextKeyListener; 50import android.util.AttributeSet; 51import android.util.Config; 52import android.util.EventLog; 53import android.util.Log; 54import android.util.SparseArray; 55import android.view.ActionBarView; 56import android.view.ContextMenu; 57import android.view.ContextThemeWrapper; 58import android.view.InflateException; 59import android.view.KeyEvent; 60import android.view.LayoutInflater; 61import android.view.Menu; 62import android.view.MenuInflater; 63import android.view.MenuItem; 64import android.view.MotionEvent; 65import android.view.View; 66import android.view.ViewGroup; 67import android.view.ViewManager; 68import android.view.Window; 69import android.view.WindowManager; 70import android.view.ContextMenu.ContextMenuInfo; 71import android.view.View.OnCreateContextMenuListener; 72import android.view.ViewGroup.LayoutParams; 73import android.view.accessibility.AccessibilityEvent; 74import android.widget.AdapterView; 75import android.widget.LinearLayout; 76 77import com.android.internal.app.SplitActionBar; 78import com.android.internal.policy.PolicyManager; 79 80/** 81 * An activity is a single, focused thing that the user can do. Almost all 82 * activities interact with the user, so the Activity class takes care of 83 * creating a window for you in which you can place your UI with 84 * {@link #setContentView}. While activities are often presented to the user 85 * as full-screen windows, they can also be used in other ways: as floating 86 * windows (via a theme with {@link android.R.attr#windowIsFloating} set) 87 * or embedded inside of another activity (using {@link ActivityGroup}). 88 * 89 * There are two methods almost all subclasses of Activity will implement: 90 * 91 * <ul> 92 * <li> {@link #onCreate} is where you initialize your activity. Most 93 * importantly, here you will usually call {@link #setContentView(int)} 94 * with a layout resource defining your UI, and using {@link #findViewById} 95 * to retrieve the widgets in that UI that you need to interact with 96 * programmatically. 97 * 98 * <li> {@link #onPause} is where you deal with the user leaving your 99 * activity. Most importantly, any changes made by the user should at this 100 * point be committed (usually to the 101 * {@link android.content.ContentProvider} holding the data). 102 * </ul> 103 * 104 * <p>To be of use with {@link android.content.Context#startActivity Context.startActivity()}, all 105 * activity classes must have a corresponding 106 * {@link android.R.styleable#AndroidManifestActivity <activity>} 107 * declaration in their package's <code>AndroidManifest.xml</code>.</p> 108 * 109 * <p>The Activity class is an important part of an application's overall lifecycle, 110 * and the way activities are launched and put together is a fundamental 111 * part of the platform's application model. For a detailed perspective on the structure of 112 * Android applications and lifecycles, please read the <em>Dev Guide</em> document on 113 * <a href="{@docRoot}guide/topics/fundamentals.html">Application Fundamentals</a>.</p> 114 * 115 * <p>Topics covered here: 116 * <ol> 117 * <li><a href="#ActivityLifecycle">Activity Lifecycle</a> 118 * <li><a href="#ConfigurationChanges">Configuration Changes</a> 119 * <li><a href="#StartingActivities">Starting Activities and Getting Results</a> 120 * <li><a href="#SavingPersistentState">Saving Persistent State</a> 121 * <li><a href="#Permissions">Permissions</a> 122 * <li><a href="#ProcessLifecycle">Process Lifecycle</a> 123 * </ol> 124 * 125 * <a name="ActivityLifecycle"></a> 126 * <h3>Activity Lifecycle</h3> 127 * 128 * <p>Activities in the system are managed as an <em>activity stack</em>. 129 * When a new activity is started, it is placed on the top of the stack 130 * and becomes the running activity -- the previous activity always remains 131 * below it in the stack, and will not come to the foreground again until 132 * the new activity exits.</p> 133 * 134 * <p>An activity has essentially four states:</p> 135 * <ul> 136 * <li> If an activity in the foreground of the screen (at the top of 137 * the stack), 138 * it is <em>active</em> or <em>running</em>. </li> 139 * <li>If an activity has lost focus but is still visible (that is, a new non-full-sized 140 * or transparent activity has focus on top of your activity), it 141 * is <em>paused</em>. A paused activity is completely alive (it 142 * maintains all state and member information and remains attached to 143 * the window manager), but can be killed by the system in extreme 144 * low memory situations. 145 * <li>If an activity is completely obscured by another activity, 146 * it is <em>stopped</em>. It still retains all state and member information, 147 * however, it is no longer visible to the user so its window is hidden 148 * and it will often be killed by the system when memory is needed 149 * elsewhere.</li> 150 * <li>If an activity is paused or stopped, the system can drop the activity 151 * from memory by either asking it to finish, or simply killing its 152 * process. When it is displayed again to the user, it must be 153 * completely restarted and restored to its previous state.</li> 154 * </ul> 155 * 156 * <p>The following diagram shows the important state paths of an Activity. 157 * The square rectangles represent callback methods you can implement to 158 * perform operations when the Activity moves between states. The colored 159 * ovals are major states the Activity can be in.</p> 160 * 161 * <p><img src="../../../images/activity_lifecycle.png" 162 * alt="State diagram for an Android Activity Lifecycle." border="0" /></p> 163 * 164 * <p>There are three key loops you may be interested in monitoring within your 165 * activity: 166 * 167 * <ul> 168 * <li>The <b>entire lifetime</b> of an activity happens between the first call 169 * to {@link android.app.Activity#onCreate} through to a single final call 170 * to {@link android.app.Activity#onDestroy}. An activity will do all setup 171 * of "global" state in onCreate(), and release all remaining resources in 172 * onDestroy(). For example, if it has a thread running in the background 173 * to download data from the network, it may create that thread in onCreate() 174 * and then stop the thread in onDestroy(). 175 * 176 * <li>The <b>visible lifetime</b> of an activity happens between a call to 177 * {@link android.app.Activity#onStart} until a corresponding call to 178 * {@link android.app.Activity#onStop}. During this time the user can see the 179 * activity on-screen, though it may not be in the foreground and interacting 180 * with the user. Between these two methods you can maintain resources that 181 * are needed to show the activity to the user. For example, you can register 182 * a {@link android.content.BroadcastReceiver} in onStart() to monitor for changes 183 * that impact your UI, and unregister it in onStop() when the user an no 184 * longer see what you are displaying. The onStart() and onStop() methods 185 * can be called multiple times, as the activity becomes visible and hidden 186 * to the user. 187 * 188 * <li>The <b>foreground lifetime</b> of an activity happens between a call to 189 * {@link android.app.Activity#onResume} until a corresponding call to 190 * {@link android.app.Activity#onPause}. During this time the activity is 191 * in front of all other activities and interacting with the user. An activity 192 * can frequently go between the resumed and paused states -- for example when 193 * the device goes to sleep, when an activity result is delivered, when a new 194 * intent is delivered -- so the code in these methods should be fairly 195 * lightweight. 196 * </ul> 197 * 198 * <p>The entire lifecycle of an activity is defined by the following 199 * Activity methods. All of these are hooks that you can override 200 * to do appropriate work when the activity changes state. All 201 * activities will implement {@link android.app.Activity#onCreate} 202 * to do their initial setup; many will also implement 203 * {@link android.app.Activity#onPause} to commit changes to data and 204 * otherwise prepare to stop interacting with the user. You should always 205 * call up to your superclass when implementing these methods.</p> 206 * 207 * </p> 208 * <pre class="prettyprint"> 209 * public class Activity extends ApplicationContext { 210 * protected void onCreate(Bundle savedInstanceState); 211 * 212 * protected void onStart(); 213 * 214 * protected void onRestart(); 215 * 216 * protected void onResume(); 217 * 218 * protected void onPause(); 219 * 220 * protected void onStop(); 221 * 222 * protected void onDestroy(); 223 * } 224 * </pre> 225 * 226 * <p>In general the movement through an activity's lifecycle looks like 227 * this:</p> 228 * 229 * <table border="2" width="85%" align="center" frame="hsides" rules="rows"> 230 * <colgroup align="left" span="3" /> 231 * <colgroup align="left" /> 232 * <colgroup align="center" /> 233 * <colgroup align="center" /> 234 * 235 * <thead> 236 * <tr><th colspan="3">Method</th> <th>Description</th> <th>Killable?</th> <th>Next</th></tr> 237 * </thead> 238 * 239 * <tbody> 240 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onCreate onCreate()}</th> 241 * <td>Called when the activity is first created. 242 * This is where you should do all of your normal static set up: 243 * create views, bind data to lists, etc. This method also 244 * provides you with a Bundle containing the activity's previously 245 * frozen state, if there was one. 246 * <p>Always followed by <code>onStart()</code>.</td> 247 * <td align="center">No</td> 248 * <td align="center"><code>onStart()</code></td> 249 * </tr> 250 * 251 * <tr><td rowspan="5" style="border-left: none; border-right: none;"> </td> 252 * <th colspan="2" align="left" border="0">{@link android.app.Activity#onRestart onRestart()}</th> 253 * <td>Called after your activity has been stopped, prior to it being 254 * started again. 255 * <p>Always followed by <code>onStart()</code></td> 256 * <td align="center">No</td> 257 * <td align="center"><code>onStart()</code></td> 258 * </tr> 259 * 260 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStart onStart()}</th> 261 * <td>Called when the activity is becoming visible to the user. 262 * <p>Followed by <code>onResume()</code> if the activity comes 263 * to the foreground, or <code>onStop()</code> if it becomes hidden.</td> 264 * <td align="center">No</td> 265 * <td align="center"><code>onResume()</code> or <code>onStop()</code></td> 266 * </tr> 267 * 268 * <tr><td rowspan="2" style="border-left: none;"> </td> 269 * <th align="left" border="0">{@link android.app.Activity#onResume onResume()}</th> 270 * <td>Called when the activity will start 271 * interacting with the user. At this point your activity is at 272 * the top of the activity stack, with user input going to it. 273 * <p>Always followed by <code>onPause()</code>.</td> 274 * <td align="center">No</td> 275 * <td align="center"><code>onPause()</code></td> 276 * </tr> 277 * 278 * <tr><th align="left" border="0">{@link android.app.Activity#onPause onPause()}</th> 279 * <td>Called when the system is about to start resuming a previous 280 * activity. This is typically used to commit unsaved changes to 281 * persistent data, stop animations and other things that may be consuming 282 * CPU, etc. Implementations of this method must be very quick because 283 * the next activity will not be resumed until this method returns. 284 * <p>Followed by either <code>onResume()</code> if the activity 285 * returns back to the front, or <code>onStop()</code> if it becomes 286 * invisible to the user.</td> 287 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 288 * <td align="center"><code>onResume()</code> or<br> 289 * <code>onStop()</code></td> 290 * </tr> 291 * 292 * <tr><th colspan="2" align="left" border="0">{@link android.app.Activity#onStop onStop()}</th> 293 * <td>Called when the activity is no longer visible to the user, because 294 * another activity has been resumed and is covering this one. This 295 * may happen either because a new activity is being started, an existing 296 * one is being brought in front of this one, or this one is being 297 * destroyed. 298 * <p>Followed by either <code>onRestart()</code> if 299 * this activity is coming back to interact with the user, or 300 * <code>onDestroy()</code> if this activity is going away.</td> 301 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 302 * <td align="center"><code>onRestart()</code> or<br> 303 * <code>onDestroy()</code></td> 304 * </tr> 305 * 306 * <tr><th colspan="3" align="left" border="0">{@link android.app.Activity#onDestroy onDestroy()}</th> 307 * <td>The final call you receive before your 308 * activity is destroyed. This can happen either because the 309 * activity is finishing (someone called {@link Activity#finish} on 310 * it, or because the system is temporarily destroying this 311 * instance of the activity to save space. You can distinguish 312 * between these two scenarios with the {@link 313 * Activity#isFinishing} method.</td> 314 * <td align="center"><font color="#800000"><strong>Yes</strong></font></td> 315 * <td align="center"><em>nothing</em></td> 316 * </tr> 317 * </tbody> 318 * </table> 319 * 320 * <p>Note the "Killable" column in the above table -- for those methods that 321 * are marked as being killable, after that method returns the process hosting the 322 * activity may killed by the system <em>at any time</em> without another line 323 * of its code being executed. Because of this, you should use the 324 * {@link #onPause} method to write any persistent data (such as user edits) 325 * to storage. In addition, the method 326 * {@link #onSaveInstanceState(Bundle)} is called before placing the activity 327 * in such a background state, allowing you to save away any dynamic instance 328 * state in your activity into the given Bundle, to be later received in 329 * {@link #onCreate} if the activity needs to be re-created. 330 * See the <a href="#ProcessLifecycle">Process Lifecycle</a> 331 * section for more information on how the lifecycle of a process is tied 332 * to the activities it is hosting. Note that it is important to save 333 * persistent data in {@link #onPause} instead of {@link #onSaveInstanceState} 334 * because the later is not part of the lifecycle callbacks, so will not 335 * be called in every situation as described in its documentation.</p> 336 * 337 * <p>For those methods that are not marked as being killable, the activity's 338 * process will not be killed by the system starting from the time the method 339 * is called and continuing after it returns. Thus an activity is in the killable 340 * state, for example, between after <code>onPause()</code> to the start of 341 * <code>onResume()</code>.</p> 342 * 343 * <a name="ConfigurationChanges"></a> 344 * <h3>Configuration Changes</h3> 345 * 346 * <p>If the configuration of the device (as defined by the 347 * {@link Configuration Resources.Configuration} class) changes, 348 * then anything displaying a user interface will need to update to match that 349 * configuration. Because Activity is the primary mechanism for interacting 350 * with the user, it includes special support for handling configuration 351 * changes.</p> 352 * 353 * <p>Unless you specify otherwise, a configuration change (such as a change 354 * in screen orientation, language, input devices, etc) will cause your 355 * current activity to be <em>destroyed</em>, going through the normal activity 356 * lifecycle process of {@link #onPause}, 357 * {@link #onStop}, and {@link #onDestroy} as appropriate. If the activity 358 * had been in the foreground or visible to the user, once {@link #onDestroy} is 359 * called in that instance then a new instance of the activity will be 360 * created, with whatever savedInstanceState the previous instance had generated 361 * from {@link #onSaveInstanceState}.</p> 362 * 363 * <p>This is done because any application resource, 364 * including layout files, can change based on any configuration value. Thus 365 * the only safe way to handle a configuration change is to re-retrieve all 366 * resources, including layouts, drawables, and strings. Because activities 367 * must already know how to save their state and re-create themselves from 368 * that state, this is a convenient way to have an activity restart itself 369 * with a new configuration.</p> 370 * 371 * <p>In some special cases, you may want to bypass restarting of your 372 * activity based on one or more types of configuration changes. This is 373 * done with the {@link android.R.attr#configChanges android:configChanges} 374 * attribute in its manifest. For any types of configuration changes you say 375 * that you handle there, you will receive a call to your current activity's 376 * {@link #onConfigurationChanged} method instead of being restarted. If 377 * a configuration change involves any that you do not handle, however, the 378 * activity will still be restarted and {@link #onConfigurationChanged} 379 * will not be called.</p> 380 * 381 * <a name="StartingActivities"></a> 382 * <h3>Starting Activities and Getting Results</h3> 383 * 384 * <p>The {@link android.app.Activity#startActivity} 385 * method is used to start a 386 * new activity, which will be placed at the top of the activity stack. It 387 * takes a single argument, an {@link android.content.Intent Intent}, 388 * which describes the activity 389 * to be executed.</p> 390 * 391 * <p>Sometimes you want to get a result back from an activity when it 392 * ends. For example, you may start an activity that lets the user pick 393 * a person in a list of contacts; when it ends, it returns the person 394 * that was selected. To do this, you call the 395 * {@link android.app.Activity#startActivityForResult(Intent, int)} 396 * version with a second integer parameter identifying the call. The result 397 * will come back through your {@link android.app.Activity#onActivityResult} 398 * method.</p> 399 * 400 * <p>When an activity exits, it can call 401 * {@link android.app.Activity#setResult(int)} 402 * to return data back to its parent. It must always supply a result code, 403 * which can be the standard results RESULT_CANCELED, RESULT_OK, or any 404 * custom values starting at RESULT_FIRST_USER. In addition, it can optionally 405 * return back an Intent containing any additional data it wants. All of this 406 * information appears back on the 407 * parent's <code>Activity.onActivityResult()</code>, along with the integer 408 * identifier it originally supplied.</p> 409 * 410 * <p>If a child activity fails for any reason (such as crashing), the parent 411 * activity will receive a result with the code RESULT_CANCELED.</p> 412 * 413 * <pre class="prettyprint"> 414 * public class MyActivity extends Activity { 415 * ... 416 * 417 * static final int PICK_CONTACT_REQUEST = 0; 418 * 419 * protected boolean onKeyDown(int keyCode, KeyEvent event) { 420 * if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { 421 * // When the user center presses, let them pick a contact. 422 * startActivityForResult( 423 * new Intent(Intent.ACTION_PICK, 424 * new Uri("content://contacts")), 425 * PICK_CONTACT_REQUEST); 426 * return true; 427 * } 428 * return false; 429 * } 430 * 431 * protected void onActivityResult(int requestCode, int resultCode, 432 * Intent data) { 433 * if (requestCode == PICK_CONTACT_REQUEST) { 434 * if (resultCode == RESULT_OK) { 435 * // A contact was picked. Here we will just display it 436 * // to the user. 437 * startActivity(new Intent(Intent.ACTION_VIEW, data)); 438 * } 439 * } 440 * } 441 * } 442 * </pre> 443 * 444 * <a name="SavingPersistentState"></a> 445 * <h3>Saving Persistent State</h3> 446 * 447 * <p>There are generally two kinds of persistent state than an activity 448 * will deal with: shared document-like data (typically stored in a SQLite 449 * database using a {@linkplain android.content.ContentProvider content provider}) 450 * and internal state such as user preferences.</p> 451 * 452 * <p>For content provider data, we suggest that activities use a 453 * "edit in place" user model. That is, any edits a user makes are effectively 454 * made immediately without requiring an additional confirmation step. 455 * Supporting this model is generally a simple matter of following two rules:</p> 456 * 457 * <ul> 458 * <li> <p>When creating a new document, the backing database entry or file for 459 * it is created immediately. For example, if the user chooses to write 460 * a new e-mail, a new entry for that e-mail is created as soon as they 461 * start entering data, so that if they go to any other activity after 462 * that point this e-mail will now appear in the list of drafts.</p> 463 * <li> <p>When an activity's <code>onPause()</code> method is called, it should 464 * commit to the backing content provider or file any changes the user 465 * has made. This ensures that those changes will be seen by any other 466 * activity that is about to run. You will probably want to commit 467 * your data even more aggressively at key times during your 468 * activity's lifecycle: for example before starting a new 469 * activity, before finishing your own activity, when the user 470 * switches between input fields, etc.</p> 471 * </ul> 472 * 473 * <p>This model is designed to prevent data loss when a user is navigating 474 * between activities, and allows the system to safely kill an activity (because 475 * system resources are needed somewhere else) at any time after it has been 476 * paused. Note this implies 477 * that the user pressing BACK from your activity does <em>not</em> 478 * mean "cancel" -- it means to leave the activity with its current contents 479 * saved away. Cancelling edits in an activity must be provided through 480 * some other mechanism, such as an explicit "revert" or "undo" option.</p> 481 * 482 * <p>See the {@linkplain android.content.ContentProvider content package} for 483 * more information about content providers. These are a key aspect of how 484 * different activities invoke and propagate data between themselves.</p> 485 * 486 * <p>The Activity class also provides an API for managing internal persistent state 487 * associated with an activity. This can be used, for example, to remember 488 * the user's preferred initial display in a calendar (day view or week view) 489 * or the user's default home page in a web browser.</p> 490 * 491 * <p>Activity persistent state is managed 492 * with the method {@link #getPreferences}, 493 * allowing you to retrieve and 494 * modify a set of name/value pairs associated with the activity. To use 495 * preferences that are shared across multiple application components 496 * (activities, receivers, services, providers), you can use the underlying 497 * {@link Context#getSharedPreferences Context.getSharedPreferences()} method 498 * to retrieve a preferences 499 * object stored under a specific name. 500 * (Note that it is not possible to share settings data across application 501 * packages -- for that you will need a content provider.)</p> 502 * 503 * <p>Here is an excerpt from a calendar activity that stores the user's 504 * preferred view mode in its persistent settings:</p> 505 * 506 * <pre class="prettyprint"> 507 * public class CalendarActivity extends Activity { 508 * ... 509 * 510 * static final int DAY_VIEW_MODE = 0; 511 * static final int WEEK_VIEW_MODE = 1; 512 * 513 * private SharedPreferences mPrefs; 514 * private int mCurViewMode; 515 * 516 * protected void onCreate(Bundle savedInstanceState) { 517 * super.onCreate(savedInstanceState); 518 * 519 * SharedPreferences mPrefs = getSharedPreferences(); 520 * mCurViewMode = mPrefs.getInt("view_mode" DAY_VIEW_MODE); 521 * } 522 * 523 * protected void onPause() { 524 * super.onPause(); 525 * 526 * SharedPreferences.Editor ed = mPrefs.edit(); 527 * ed.putInt("view_mode", mCurViewMode); 528 * ed.commit(); 529 * } 530 * } 531 * </pre> 532 * 533 * <a name="Permissions"></a> 534 * <h3>Permissions</h3> 535 * 536 * <p>The ability to start a particular Activity can be enforced when it is 537 * declared in its 538 * manifest's {@link android.R.styleable#AndroidManifestActivity <activity>} 539 * tag. By doing so, other applications will need to declare a corresponding 540 * {@link android.R.styleable#AndroidManifestUsesPermission <uses-permission>} 541 * element in their own manifest to be able to start that activity. 542 * 543 * <p>See the <a href="{@docRoot}guide/topics/security/security.html">Security and Permissions</a> 544 * document for more information on permissions and security in general. 545 * 546 * <a name="ProcessLifecycle"></a> 547 * <h3>Process Lifecycle</h3> 548 * 549 * <p>The Android system attempts to keep application process around for as 550 * long as possible, but eventually will need to remove old processes when 551 * memory runs low. As described in <a href="#ActivityLifecycle">Activity 552 * Lifecycle</a>, the decision about which process to remove is intimately 553 * tied to the state of the user's interaction with it. In general, there 554 * are four states a process can be in based on the activities running in it, 555 * listed here in order of importance. The system will kill less important 556 * processes (the last ones) before it resorts to killing more important 557 * processes (the first ones). 558 * 559 * <ol> 560 * <li> <p>The <b>foreground activity</b> (the activity at the top of the screen 561 * that the user is currently interacting with) is considered the most important. 562 * Its process will only be killed as a last resort, if it uses more memory 563 * than is available on the device. Generally at this point the device has 564 * reached a memory paging state, so this is required in order to keep the user 565 * interface responsive. 566 * <li> <p>A <b>visible activity</b> (an activity that is visible to the user 567 * but not in the foreground, such as one sitting behind a foreground dialog) 568 * is considered extremely important and will not be killed unless that is 569 * required to keep the foreground activity running. 570 * <li> <p>A <b>background activity</b> (an activity that is not visible to 571 * the user and has been paused) is no longer critical, so the system may 572 * safely kill its process to reclaim memory for other foreground or 573 * visible processes. If its process needs to be killed, when the user navigates 574 * back to the activity (making it visible on the screen again), its 575 * {@link #onCreate} method will be called with the savedInstanceState it had previously 576 * supplied in {@link #onSaveInstanceState} so that it can restart itself in the same 577 * state as the user last left it. 578 * <li> <p>An <b>empty process</b> is one hosting no activities or other 579 * application components (such as {@link Service} or 580 * {@link android.content.BroadcastReceiver} classes). These are killed very 581 * quickly by the system as memory becomes low. For this reason, any 582 * background operation you do outside of an activity must be executed in the 583 * context of an activity BroadcastReceiver or Service to ensure that the system 584 * knows it needs to keep your process around. 585 * </ol> 586 * 587 * <p>Sometimes an Activity may need to do a long-running operation that exists 588 * independently of the activity lifecycle itself. An example may be a camera 589 * application that allows you to upload a picture to a web site. The upload 590 * may take a long time, and the application should allow the user to leave 591 * the application will it is executing. To accomplish this, your Activity 592 * should start a {@link Service} in which the upload takes place. This allows 593 * the system to properly prioritize your process (considering it to be more 594 * important than other non-visible applications) for the duration of the 595 * upload, independent of whether the original activity is paused, stopped, 596 * or finished. 597 */ 598public class Activity extends ContextThemeWrapper 599 implements LayoutInflater.Factory, 600 Window.Callback, KeyEvent.Callback, 601 OnCreateContextMenuListener, ComponentCallbacks { 602 private static final String TAG = "Activity"; 603 604 /** Standard activity result: operation canceled. */ 605 public static final int RESULT_CANCELED = 0; 606 /** Standard activity result: operation succeeded. */ 607 public static final int RESULT_OK = -1; 608 /** Start of user-defined activity results. */ 609 public static final int RESULT_FIRST_USER = 1; 610 611 private static long sInstanceCount = 0; 612 613 private static final String WINDOW_HIERARCHY_TAG = "android:viewHierarchyState"; 614 private static final String SAVED_DIALOG_IDS_KEY = "android:savedDialogIds"; 615 private static final String SAVED_DIALOGS_TAG = "android:savedDialogs"; 616 private static final String SAVED_DIALOG_KEY_PREFIX = "android:dialog_"; 617 private static final String SAVED_DIALOG_ARGS_KEY_PREFIX = "android:dialog_args_"; 618 619 private static class ManagedDialog { 620 Dialog mDialog; 621 Bundle mArgs; 622 } 623 private SparseArray<ManagedDialog> mManagedDialogs; 624 625 // set by the thread after the constructor and before onCreate(Bundle savedInstanceState) is called. 626 private Instrumentation mInstrumentation; 627 private IBinder mToken; 628 private int mIdent; 629 /*package*/ String mEmbeddedID; 630 private Application mApplication; 631 /*package*/ Intent mIntent; 632 private ComponentName mComponent; 633 /*package*/ ActivityInfo mActivityInfo; 634 /*package*/ ActivityThread mMainThread; 635 /*package*/ Object mLastNonConfigurationInstance; 636 /*package*/ HashMap<String,Object> mLastNonConfigurationChildInstances; 637 Activity mParent; 638 boolean mCalled; 639 private boolean mResumed; 640 private boolean mStopped; 641 boolean mFinished; 642 boolean mStartedActivity; 643 /** true if the activity is being destroyed in order to recreate it with a new configuration */ 644 /*package*/ boolean mChangingConfigurations = false; 645 /*package*/ int mConfigChangeFlags; 646 /*package*/ Configuration mCurrentConfig; 647 private SearchManager mSearchManager; 648 649 private Window mWindow; 650 651 private WindowManager mWindowManager; 652 /*package*/ View mDecor = null; 653 /*package*/ boolean mWindowAdded = false; 654 /*package*/ boolean mVisibleFromServer = false; 655 /*package*/ boolean mVisibleFromClient = true; 656 /*package*/ ActionBar mActionBar = null; 657 658 private CharSequence mTitle; 659 private int mTitleColor = 0; 660 661 final FragmentManager mFragments = new FragmentManager(); 662 663 private final Object[] sConstructorArgs = new Object[0]; 664 665 private static final Class[] sConstructorSignature = new Class[] { }; 666 667 private static final HashMap<String, Constructor> sConstructorMap = 668 new HashMap<String, Constructor>(); 669 670 private final class FragmentTransactionImpl implements FragmentTransaction, 671 Runnable, BackStackState { 672 ArrayList<Fragment> mAdded; 673 ArrayList<Fragment> mRemoved; 674 int mTransition; 675 int mTransitionStyle; 676 boolean mAddToBackStack; 677 String mName; 678 boolean mCommitted; 679 680 public FragmentTransaction add(Fragment fragment) { 681 return add(fragment, 0); 682 } 683 684 public FragmentTransaction add(Fragment fragment, int containerViewId) { 685 if (fragment.mActivity != null) { 686 throw new IllegalStateException("Fragment already added: " + fragment); 687 } 688 if (mRemoved != null) { 689 mRemoved.remove(fragment); 690 } 691 if (mAdded == null) { 692 mAdded = new ArrayList<Fragment>(); 693 } 694 fragment.mContainerId = containerViewId; 695 mAdded.add(fragment); 696 return this; 697 } 698 699 public FragmentTransaction replace(Fragment fragment, int containerViewId) { 700 if (containerViewId == 0) { 701 throw new IllegalArgumentException("Must use non-zero containerViewId"); 702 } 703 if (mFragments.mFragments != null) { 704 for (int i=0; i<mFragments.mFragments.size(); i++) { 705 Fragment old = mFragments.mFragments.get(i); 706 if (old.mContainerId == containerViewId) { 707 remove(old); 708 } 709 } 710 } 711 return add(fragment, containerViewId); 712 } 713 714 public FragmentTransaction remove(Fragment fragment) { 715 if (fragment.mActivity == null) { 716 throw new IllegalStateException("Fragment not added: " + fragment); 717 } 718 if (mAdded != null) { 719 mAdded.remove(fragment); 720 } 721 if (mRemoved == null) { 722 mRemoved = new ArrayList<Fragment>(); 723 } 724 mRemoved.add(fragment); 725 return this; 726 } 727 728 public FragmentTransaction setTransition(int transition) { 729 mTransition = transition; 730 return this; 731 } 732 733 public FragmentTransaction setTransitionStyle(int styleRes) { 734 mTransitionStyle = styleRes; 735 return this; 736 } 737 738 public FragmentTransaction addToBackStack(String name) { 739 mAddToBackStack = true; 740 mName = name; 741 return this; 742 } 743 744 public void commit() { 745 if (mCommitted) throw new IllegalStateException("commit already called"); 746 mCommitted = true; 747 mHandler.post(this); 748 } 749 750 public void run() { 751 if (mRemoved != null) { 752 for (int i=mRemoved.size()-1; i>=0; i--) { 753 mFragments.removeFragment(mRemoved.get(i), mTransition, 754 mTransitionStyle); 755 } 756 } 757 if (mAdded != null) { 758 for (int i=mAdded.size()-1; i>=0; i--) { 759 Fragment f = mAdded.get(i); 760 mFragments.addFragment(f, false); 761 if (mAddToBackStack) { 762 f.mBackStackNesting++; 763 } 764 } 765 } 766 mFragments.moveToState(mFragments.mCurState, mTransition, 767 mTransitionStyle, true); 768 if (mAddToBackStack) { 769 mFragments.addBackStackState(this); 770 } 771 } 772 773 public void popFromBackStack() { 774 if (mAdded != null) { 775 for (int i=mAdded.size()-1; i>=0; i--) { 776 Fragment f = mAdded.get(i); 777 if (mAddToBackStack) { 778 f.mBackStackNesting--; 779 } 780 mFragments.removeFragment(f, 781 FragmentManager.reverseTransit(mTransition), 782 mTransitionStyle); 783 } 784 } 785 if (mRemoved != null) { 786 for (int i=mRemoved.size()-1; i>=0; i--) { 787 mFragments.addFragment(mRemoved.get(i), false); 788 } 789 } 790 } 791 792 public String getName() { 793 return mName; 794 } 795 796 public int getTransition() { 797 return mTransition; 798 } 799 800 public int getTransitionStyle() { 801 return mTransitionStyle; 802 } 803 } 804 805 private static final class ManagedCursor { 806 ManagedCursor(Cursor cursor) { 807 mCursor = cursor; 808 mReleased = false; 809 mUpdated = false; 810 } 811 812 private final Cursor mCursor; 813 private boolean mReleased; 814 private boolean mUpdated; 815 } 816 private final ArrayList<ManagedCursor> mManagedCursors = 817 new ArrayList<ManagedCursor>(); 818 819 // protected by synchronized (this) 820 int mResultCode = RESULT_CANCELED; 821 Intent mResultData = null; 822 823 private boolean mTitleReady = false; 824 825 private int mDefaultKeyMode = DEFAULT_KEYS_DISABLE; 826 private SpannableStringBuilder mDefaultKeySsb = null; 827 828 protected static final int[] FOCUSED_STATE_SET = {com.android.internal.R.attr.state_focused}; 829 830 private Thread mUiThread; 831 private final Handler mHandler = new Handler(); 832 833 // Used for debug only 834 /* 835 public Activity() { 836 ++sInstanceCount; 837 } 838 839 @Override 840 protected void finalize() throws Throwable { 841 super.finalize(); 842 --sInstanceCount; 843 } 844 */ 845 846 public static long getInstanceCount() { 847 return sInstanceCount; 848 } 849 850 /** Return the intent that started this activity. */ 851 public Intent getIntent() { 852 return mIntent; 853 } 854 855 /** 856 * Change the intent returned by {@link #getIntent}. This holds a 857 * reference to the given intent; it does not copy it. Often used in 858 * conjunction with {@link #onNewIntent}. 859 * 860 * @param newIntent The new Intent object to return from getIntent 861 * 862 * @see #getIntent 863 * @see #onNewIntent 864 */ 865 public void setIntent(Intent newIntent) { 866 mIntent = newIntent; 867 } 868 869 /** Return the application that owns this activity. */ 870 public final Application getApplication() { 871 return mApplication; 872 } 873 874 /** Is this activity embedded inside of another activity? */ 875 public final boolean isChild() { 876 return mParent != null; 877 } 878 879 /** Return the parent activity if this view is an embedded child. */ 880 public final Activity getParent() { 881 return mParent; 882 } 883 884 /** Retrieve the window manager for showing custom windows. */ 885 public WindowManager getWindowManager() { 886 return mWindowManager; 887 } 888 889 /** 890 * Retrieve the current {@link android.view.Window} for the activity. 891 * This can be used to directly access parts of the Window API that 892 * are not available through Activity/Screen. 893 * 894 * @return Window The current window, or null if the activity is not 895 * visual. 896 */ 897 public Window getWindow() { 898 return mWindow; 899 } 900 901 /** 902 * Calls {@link android.view.Window#getCurrentFocus} on the 903 * Window of this Activity to return the currently focused view. 904 * 905 * @return View The current View with focus or null. 906 * 907 * @see #getWindow 908 * @see android.view.Window#getCurrentFocus 909 */ 910 public View getCurrentFocus() { 911 return mWindow != null ? mWindow.getCurrentFocus() : null; 912 } 913 914 @Override 915 public int getWallpaperDesiredMinimumWidth() { 916 int width = super.getWallpaperDesiredMinimumWidth(); 917 return width <= 0 ? getWindowManager().getDefaultDisplay().getWidth() : width; 918 } 919 920 @Override 921 public int getWallpaperDesiredMinimumHeight() { 922 int height = super.getWallpaperDesiredMinimumHeight(); 923 return height <= 0 ? getWindowManager().getDefaultDisplay().getHeight() : height; 924 } 925 926 /** 927 * Called when the activity is starting. This is where most initialization 928 * should go: calling {@link #setContentView(int)} to inflate the 929 * activity's UI, using {@link #findViewById} to programmatically interact 930 * with widgets in the UI, calling 931 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)} to retrieve 932 * cursors for data being displayed, etc. 933 * 934 * <p>You can call {@link #finish} from within this function, in 935 * which case onDestroy() will be immediately called without any of the rest 936 * of the activity lifecycle ({@link #onStart}, {@link #onResume}, 937 * {@link #onPause}, etc) executing. 938 * 939 * <p><em>Derived classes must call through to the super class's 940 * implementation of this method. If they do not, an exception will be 941 * thrown.</em></p> 942 * 943 * @param savedInstanceState If the activity is being re-initialized after 944 * previously being shut down then this Bundle contains the data it most 945 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 946 * 947 * @see #onStart 948 * @see #onSaveInstanceState 949 * @see #onRestoreInstanceState 950 * @see #onPostCreate 951 */ 952 protected void onCreate(Bundle savedInstanceState) { 953 mVisibleFromClient = !mWindow.getWindowStyle().getBoolean( 954 com.android.internal.R.styleable.Window_windowNoDisplay, false); 955 mFragments.dispatchCreate(savedInstanceState); 956 mCalled = true; 957 } 958 959 /** 960 * The hook for {@link ActivityThread} to restore the state of this activity. 961 * 962 * Calls {@link #onSaveInstanceState(android.os.Bundle)} and 963 * {@link #restoreManagedDialogs(android.os.Bundle)}. 964 * 965 * @param savedInstanceState contains the saved state 966 */ 967 final void performRestoreInstanceState(Bundle savedInstanceState) { 968 onRestoreInstanceState(savedInstanceState); 969 restoreManagedDialogs(savedInstanceState); 970 } 971 972 /** 973 * This method is called after {@link #onStart} when the activity is 974 * being re-initialized from a previously saved state, given here in 975 * <var>savedInstanceState</var>. Most implementations will simply use {@link #onCreate} 976 * to restore their state, but it is sometimes convenient to do it here 977 * after all of the initialization has been done or to allow subclasses to 978 * decide whether to use your default implementation. The default 979 * implementation of this method performs a restore of any view state that 980 * had previously been frozen by {@link #onSaveInstanceState}. 981 * 982 * <p>This method is called between {@link #onStart} and 983 * {@link #onPostCreate}. 984 * 985 * @param savedInstanceState the data most recently supplied in {@link #onSaveInstanceState}. 986 * 987 * @see #onCreate 988 * @see #onPostCreate 989 * @see #onResume 990 * @see #onSaveInstanceState 991 */ 992 protected void onRestoreInstanceState(Bundle savedInstanceState) { 993 if (mWindow != null) { 994 Bundle windowState = savedInstanceState.getBundle(WINDOW_HIERARCHY_TAG); 995 if (windowState != null) { 996 mWindow.restoreHierarchyState(windowState); 997 } 998 } 999 } 1000 1001 /** 1002 * Restore the state of any saved managed dialogs. 1003 * 1004 * @param savedInstanceState The bundle to restore from. 1005 */ 1006 private void restoreManagedDialogs(Bundle savedInstanceState) { 1007 final Bundle b = savedInstanceState.getBundle(SAVED_DIALOGS_TAG); 1008 if (b == null) { 1009 return; 1010 } 1011 1012 final int[] ids = b.getIntArray(SAVED_DIALOG_IDS_KEY); 1013 final int numDialogs = ids.length; 1014 mManagedDialogs = new SparseArray<ManagedDialog>(numDialogs); 1015 for (int i = 0; i < numDialogs; i++) { 1016 final Integer dialogId = ids[i]; 1017 Bundle dialogState = b.getBundle(savedDialogKeyFor(dialogId)); 1018 if (dialogState != null) { 1019 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate 1020 // so tell createDialog() not to do it, otherwise we get an exception 1021 final ManagedDialog md = new ManagedDialog(); 1022 md.mArgs = b.getBundle(savedDialogArgsKeyFor(dialogId)); 1023 md.mDialog = createDialog(dialogId, dialogState, md.mArgs); 1024 if (md.mDialog != null) { 1025 mManagedDialogs.put(dialogId, md); 1026 onPrepareDialog(dialogId, md.mDialog, md.mArgs); 1027 md.mDialog.onRestoreInstanceState(dialogState); 1028 } 1029 } 1030 } 1031 } 1032 1033 private Dialog createDialog(Integer dialogId, Bundle state, Bundle args) { 1034 final Dialog dialog = onCreateDialog(dialogId, args); 1035 if (dialog == null) { 1036 return null; 1037 } 1038 dialog.dispatchOnCreate(state); 1039 return dialog; 1040 } 1041 1042 private static String savedDialogKeyFor(int key) { 1043 return SAVED_DIALOG_KEY_PREFIX + key; 1044 } 1045 1046 private static String savedDialogArgsKeyFor(int key) { 1047 return SAVED_DIALOG_ARGS_KEY_PREFIX + key; 1048 } 1049 1050 /** 1051 * Called when activity start-up is complete (after {@link #onStart} 1052 * and {@link #onRestoreInstanceState} have been called). Applications will 1053 * generally not implement this method; it is intended for system 1054 * classes to do final initialization after application code has run. 1055 * 1056 * <p><em>Derived classes must call through to the super class's 1057 * implementation of this method. If they do not, an exception will be 1058 * thrown.</em></p> 1059 * 1060 * @param savedInstanceState If the activity is being re-initialized after 1061 * previously being shut down then this Bundle contains the data it most 1062 * recently supplied in {@link #onSaveInstanceState}. <b><i>Note: Otherwise it is null.</i></b> 1063 * @see #onCreate 1064 */ 1065 protected void onPostCreate(Bundle savedInstanceState) { 1066 if (!isChild()) { 1067 mTitleReady = true; 1068 onTitleChanged(getTitle(), getTitleColor()); 1069 } 1070 mCalled = true; 1071 } 1072 1073 /** 1074 * Called after {@link #onCreate} — or after {@link #onRestart} when 1075 * the activity had been stopped, but is now again being displayed to the 1076 * user. It will be followed by {@link #onResume}. 1077 * 1078 * <p><em>Derived classes must call through to the super class's 1079 * implementation of this method. If they do not, an exception will be 1080 * thrown.</em></p> 1081 * 1082 * @see #onCreate 1083 * @see #onStop 1084 * @see #onResume 1085 */ 1086 protected void onStart() { 1087 mCalled = true; 1088 } 1089 1090 /** 1091 * Called after {@link #onStop} when the current activity is being 1092 * re-displayed to the user (the user has navigated back to it). It will 1093 * be followed by {@link #onStart} and then {@link #onResume}. 1094 * 1095 * <p>For activities that are using raw {@link Cursor} objects (instead of 1096 * creating them through 1097 * {@link #managedQuery(android.net.Uri , String[], String, String[], String)}, 1098 * this is usually the place 1099 * where the cursor should be requeried (because you had deactivated it in 1100 * {@link #onStop}. 1101 * 1102 * <p><em>Derived classes must call through to the super class's 1103 * implementation of this method. If they do not, an exception will be 1104 * thrown.</em></p> 1105 * 1106 * @see #onStop 1107 * @see #onStart 1108 * @see #onResume 1109 */ 1110 protected void onRestart() { 1111 mCalled = true; 1112 } 1113 1114 /** 1115 * Called after {@link #onRestoreInstanceState}, {@link #onRestart}, or 1116 * {@link #onPause}, for your activity to start interacting with the user. 1117 * This is a good place to begin animations, open exclusive-access devices 1118 * (such as the camera), etc. 1119 * 1120 * <p>Keep in mind that onResume is not the best indicator that your activity 1121 * is visible to the user; a system window such as the keyguard may be in 1122 * front. Use {@link #onWindowFocusChanged} to know for certain that your 1123 * activity is visible to the user (for example, to resume a game). 1124 * 1125 * <p><em>Derived classes must call through to the super class's 1126 * implementation of this method. If they do not, an exception will be 1127 * thrown.</em></p> 1128 * 1129 * @see #onRestoreInstanceState 1130 * @see #onRestart 1131 * @see #onPostResume 1132 * @see #onPause 1133 */ 1134 protected void onResume() { 1135 mCalled = true; 1136 } 1137 1138 /** 1139 * Called when activity resume is complete (after {@link #onResume} has 1140 * been called). Applications will generally not implement this method; 1141 * it is intended for system classes to do final setup after application 1142 * resume code has run. 1143 * 1144 * <p><em>Derived classes must call through to the super class's 1145 * implementation of this method. If they do not, an exception will be 1146 * thrown.</em></p> 1147 * 1148 * @see #onResume 1149 */ 1150 protected void onPostResume() { 1151 final Window win = getWindow(); 1152 if (win != null) win.makeActive(); 1153 mCalled = true; 1154 } 1155 1156 /** 1157 * This is called for activities that set launchMode to "singleTop" in 1158 * their package, or if a client used the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} 1159 * flag when calling {@link #startActivity}. In either case, when the 1160 * activity is re-launched while at the top of the activity stack instead 1161 * of a new instance of the activity being started, onNewIntent() will be 1162 * called on the existing instance with the Intent that was used to 1163 * re-launch it. 1164 * 1165 * <p>An activity will always be paused before receiving a new intent, so 1166 * you can count on {@link #onResume} being called after this method. 1167 * 1168 * <p>Note that {@link #getIntent} still returns the original Intent. You 1169 * can use {@link #setIntent} to update it to this new Intent. 1170 * 1171 * @param intent The new intent that was started for the activity. 1172 * 1173 * @see #getIntent 1174 * @see #setIntent 1175 * @see #onResume 1176 */ 1177 protected void onNewIntent(Intent intent) { 1178 } 1179 1180 /** 1181 * The hook for {@link ActivityThread} to save the state of this activity. 1182 * 1183 * Calls {@link #onSaveInstanceState(android.os.Bundle)} 1184 * and {@link #saveManagedDialogs(android.os.Bundle)}. 1185 * 1186 * @param outState The bundle to save the state to. 1187 */ 1188 final void performSaveInstanceState(Bundle outState) { 1189 onSaveInstanceState(outState); 1190 saveManagedDialogs(outState); 1191 } 1192 1193 /** 1194 * Called to retrieve per-instance state from an activity before being killed 1195 * so that the state can be restored in {@link #onCreate} or 1196 * {@link #onRestoreInstanceState} (the {@link Bundle} populated by this method 1197 * will be passed to both). 1198 * 1199 * <p>This method is called before an activity may be killed so that when it 1200 * comes back some time in the future it can restore its state. For example, 1201 * if activity B is launched in front of activity A, and at some point activity 1202 * A is killed to reclaim resources, activity A will have a chance to save the 1203 * current state of its user interface via this method so that when the user 1204 * returns to activity A, the state of the user interface can be restored 1205 * via {@link #onCreate} or {@link #onRestoreInstanceState}. 1206 * 1207 * <p>Do not confuse this method with activity lifecycle callbacks such as 1208 * {@link #onPause}, which is always called when an activity is being placed 1209 * in the background or on its way to destruction, or {@link #onStop} which 1210 * is called before destruction. One example of when {@link #onPause} and 1211 * {@link #onStop} is called and not this method is when a user navigates back 1212 * from activity B to activity A: there is no need to call {@link #onSaveInstanceState} 1213 * on B because that particular instance will never be restored, so the 1214 * system avoids calling it. An example when {@link #onPause} is called and 1215 * not {@link #onSaveInstanceState} is when activity B is launched in front of activity A: 1216 * the system may avoid calling {@link #onSaveInstanceState} on activity A if it isn't 1217 * killed during the lifetime of B since the state of the user interface of 1218 * A will stay intact. 1219 * 1220 * <p>The default implementation takes care of most of the UI per-instance 1221 * state for you by calling {@link android.view.View#onSaveInstanceState()} on each 1222 * view in the hierarchy that has an id, and by saving the id of the currently 1223 * focused view (all of which is restored by the default implementation of 1224 * {@link #onRestoreInstanceState}). If you override this method to save additional 1225 * information not captured by each individual view, you will likely want to 1226 * call through to the default implementation, otherwise be prepared to save 1227 * all of the state of each view yourself. 1228 * 1229 * <p>If called, this method will occur before {@link #onStop}. There are 1230 * no guarantees about whether it will occur before or after {@link #onPause}. 1231 * 1232 * @param outState Bundle in which to place your saved state. 1233 * 1234 * @see #onCreate 1235 * @see #onRestoreInstanceState 1236 * @see #onPause 1237 */ 1238 protected void onSaveInstanceState(Bundle outState) { 1239 outState.putBundle(WINDOW_HIERARCHY_TAG, mWindow.saveHierarchyState()); 1240 } 1241 1242 /** 1243 * Save the state of any managed dialogs. 1244 * 1245 * @param outState place to store the saved state. 1246 */ 1247 private void saveManagedDialogs(Bundle outState) { 1248 if (mManagedDialogs == null) { 1249 return; 1250 } 1251 1252 final int numDialogs = mManagedDialogs.size(); 1253 if (numDialogs == 0) { 1254 return; 1255 } 1256 1257 Bundle dialogState = new Bundle(); 1258 1259 int[] ids = new int[mManagedDialogs.size()]; 1260 1261 // save each dialog's bundle, gather the ids 1262 for (int i = 0; i < numDialogs; i++) { 1263 final int key = mManagedDialogs.keyAt(i); 1264 ids[i] = key; 1265 final ManagedDialog md = mManagedDialogs.valueAt(i); 1266 dialogState.putBundle(savedDialogKeyFor(key), md.mDialog.onSaveInstanceState()); 1267 if (md.mArgs != null) { 1268 dialogState.putBundle(savedDialogArgsKeyFor(key), md.mArgs); 1269 } 1270 } 1271 1272 dialogState.putIntArray(SAVED_DIALOG_IDS_KEY, ids); 1273 outState.putBundle(SAVED_DIALOGS_TAG, dialogState); 1274 } 1275 1276 1277 /** 1278 * Called as part of the activity lifecycle when an activity is going into 1279 * the background, but has not (yet) been killed. The counterpart to 1280 * {@link #onResume}. 1281 * 1282 * <p>When activity B is launched in front of activity A, this callback will 1283 * be invoked on A. B will not be created until A's {@link #onPause} returns, 1284 * so be sure to not do anything lengthy here. 1285 * 1286 * <p>This callback is mostly used for saving any persistent state the 1287 * activity is editing, to present a "edit in place" model to the user and 1288 * making sure nothing is lost if there are not enough resources to start 1289 * the new activity without first killing this one. This is also a good 1290 * place to do things like stop animations and other things that consume a 1291 * noticeable mount of CPU in order to make the switch to the next activity 1292 * as fast as possible, or to close resources that are exclusive access 1293 * such as the camera. 1294 * 1295 * <p>In situations where the system needs more memory it may kill paused 1296 * processes to reclaim resources. Because of this, you should be sure 1297 * that all of your state is saved by the time you return from 1298 * this function. In general {@link #onSaveInstanceState} is used to save 1299 * per-instance state in the activity and this method is used to store 1300 * global persistent data (in content providers, files, etc.) 1301 * 1302 * <p>After receiving this call you will usually receive a following call 1303 * to {@link #onStop} (after the next activity has been resumed and 1304 * displayed), however in some cases there will be a direct call back to 1305 * {@link #onResume} without going through the stopped state. 1306 * 1307 * <p><em>Derived classes must call through to the super class's 1308 * implementation of this method. If they do not, an exception will be 1309 * thrown.</em></p> 1310 * 1311 * @see #onResume 1312 * @see #onSaveInstanceState 1313 * @see #onStop 1314 */ 1315 protected void onPause() { 1316 mCalled = true; 1317 } 1318 1319 /** 1320 * Called as part of the activity lifecycle when an activity is about to go 1321 * into the background as the result of user choice. For example, when the 1322 * user presses the Home key, {@link #onUserLeaveHint} will be called, but 1323 * when an incoming phone call causes the in-call Activity to be automatically 1324 * brought to the foreground, {@link #onUserLeaveHint} will not be called on 1325 * the activity being interrupted. In cases when it is invoked, this method 1326 * is called right before the activity's {@link #onPause} callback. 1327 * 1328 * <p>This callback and {@link #onUserInteraction} are intended to help 1329 * activities manage status bar notifications intelligently; specifically, 1330 * for helping activities determine the proper time to cancel a notfication. 1331 * 1332 * @see #onUserInteraction() 1333 */ 1334 protected void onUserLeaveHint() { 1335 } 1336 1337 /** 1338 * Generate a new thumbnail for this activity. This method is called before 1339 * pausing the activity, and should draw into <var>outBitmap</var> the 1340 * imagery for the desired thumbnail in the dimensions of that bitmap. It 1341 * can use the given <var>canvas</var>, which is configured to draw into the 1342 * bitmap, for rendering if desired. 1343 * 1344 * <p>The default implementation renders the Screen's current view 1345 * hierarchy into the canvas to generate a thumbnail. 1346 * 1347 * <p>If you return false, the bitmap will be filled with a default 1348 * thumbnail. 1349 * 1350 * @param outBitmap The bitmap to contain the thumbnail. 1351 * @param canvas Can be used to render into the bitmap. 1352 * 1353 * @return Return true if you have drawn into the bitmap; otherwise after 1354 * you return it will be filled with a default thumbnail. 1355 * 1356 * @see #onCreateDescription 1357 * @see #onSaveInstanceState 1358 * @see #onPause 1359 */ 1360 public boolean onCreateThumbnail(Bitmap outBitmap, Canvas canvas) { 1361 final View view = mDecor; 1362 if (view == null) { 1363 return false; 1364 } 1365 1366 final int vw = view.getWidth(); 1367 final int vh = view.getHeight(); 1368 final int dw = outBitmap.getWidth(); 1369 final int dh = outBitmap.getHeight(); 1370 1371 canvas.save(); 1372 canvas.scale(((float)dw)/vw, ((float)dh)/vh); 1373 view.draw(canvas); 1374 canvas.restore(); 1375 1376 return true; 1377 } 1378 1379 /** 1380 * Generate a new description for this activity. This method is called 1381 * before pausing the activity and can, if desired, return some textual 1382 * description of its current state to be displayed to the user. 1383 * 1384 * <p>The default implementation returns null, which will cause you to 1385 * inherit the description from the previous activity. If all activities 1386 * return null, generally the label of the top activity will be used as the 1387 * description. 1388 * 1389 * @return A description of what the user is doing. It should be short and 1390 * sweet (only a few words). 1391 * 1392 * @see #onCreateThumbnail 1393 * @see #onSaveInstanceState 1394 * @see #onPause 1395 */ 1396 public CharSequence onCreateDescription() { 1397 return null; 1398 } 1399 1400 /** 1401 * Called when you are no longer visible to the user. You will next 1402 * receive either {@link #onRestart}, {@link #onDestroy}, or nothing, 1403 * depending on later user activity. 1404 * 1405 * <p>Note that this method may never be called, in low memory situations 1406 * where the system does not have enough memory to keep your activity's 1407 * process running after its {@link #onPause} method is called. 1408 * 1409 * <p><em>Derived classes must call through to the super class's 1410 * implementation of this method. If they do not, an exception will be 1411 * thrown.</em></p> 1412 * 1413 * @see #onRestart 1414 * @see #onResume 1415 * @see #onSaveInstanceState 1416 * @see #onDestroy 1417 */ 1418 protected void onStop() { 1419 mCalled = true; 1420 } 1421 1422 /** 1423 * Perform any final cleanup before an activity is destroyed. This can 1424 * happen either because the activity is finishing (someone called 1425 * {@link #finish} on it, or because the system is temporarily destroying 1426 * this instance of the activity to save space. You can distinguish 1427 * between these two scenarios with the {@link #isFinishing} method. 1428 * 1429 * <p><em>Note: do not count on this method being called as a place for 1430 * saving data! For example, if an activity is editing data in a content 1431 * provider, those edits should be committed in either {@link #onPause} or 1432 * {@link #onSaveInstanceState}, not here.</em> This method is usually implemented to 1433 * free resources like threads that are associated with an activity, so 1434 * that a destroyed activity does not leave such things around while the 1435 * rest of its application is still running. There are situations where 1436 * the system will simply kill the activity's hosting process without 1437 * calling this method (or any others) in it, so it should not be used to 1438 * do things that are intended to remain around after the process goes 1439 * away. 1440 * 1441 * <p><em>Derived classes must call through to the super class's 1442 * implementation of this method. If they do not, an exception will be 1443 * thrown.</em></p> 1444 * 1445 * @see #onPause 1446 * @see #onStop 1447 * @see #finish 1448 * @see #isFinishing 1449 */ 1450 protected void onDestroy() { 1451 mCalled = true; 1452 1453 // dismiss any dialogs we are managing. 1454 if (mManagedDialogs != null) { 1455 final int numDialogs = mManagedDialogs.size(); 1456 for (int i = 0; i < numDialogs; i++) { 1457 final ManagedDialog md = mManagedDialogs.valueAt(i); 1458 if (md.mDialog.isShowing()) { 1459 md.mDialog.dismiss(); 1460 } 1461 } 1462 mManagedDialogs = null; 1463 } 1464 1465 // close any cursors we are managing. 1466 synchronized (mManagedCursors) { 1467 int numCursors = mManagedCursors.size(); 1468 for (int i = 0; i < numCursors; i++) { 1469 ManagedCursor c = mManagedCursors.get(i); 1470 if (c != null) { 1471 c.mCursor.close(); 1472 } 1473 } 1474 mManagedCursors.clear(); 1475 } 1476 1477 // Close any open search dialog 1478 if (mSearchManager != null) { 1479 mSearchManager.stopSearch(); 1480 } 1481 } 1482 1483 /** 1484 * Called by the system when the device configuration changes while your 1485 * activity is running. Note that this will <em>only</em> be called if 1486 * you have selected configurations you would like to handle with the 1487 * {@link android.R.attr#configChanges} attribute in your manifest. If 1488 * any configuration change occurs that is not selected to be reported 1489 * by that attribute, then instead of reporting it the system will stop 1490 * and restart the activity (to have it launched with the new 1491 * configuration). 1492 * 1493 * <p>At the time that this function has been called, your Resources 1494 * object will have been updated to return resource values matching the 1495 * new configuration. 1496 * 1497 * @param newConfig The new device configuration. 1498 */ 1499 public void onConfigurationChanged(Configuration newConfig) { 1500 mCalled = true; 1501 1502 if (mWindow != null) { 1503 // Pass the configuration changed event to the window 1504 mWindow.onConfigurationChanged(newConfig); 1505 } 1506 } 1507 1508 /** 1509 * If this activity is being destroyed because it can not handle a 1510 * configuration parameter being changed (and thus its 1511 * {@link #onConfigurationChanged(Configuration)} method is 1512 * <em>not</em> being called), then you can use this method to discover 1513 * the set of changes that have occurred while in the process of being 1514 * destroyed. Note that there is no guarantee that these will be 1515 * accurate (other changes could have happened at any time), so you should 1516 * only use this as an optimization hint. 1517 * 1518 * @return Returns a bit field of the configuration parameters that are 1519 * changing, as defined by the {@link android.content.res.Configuration} 1520 * class. 1521 */ 1522 public int getChangingConfigurations() { 1523 return mConfigChangeFlags; 1524 } 1525 1526 /** 1527 * Retrieve the non-configuration instance data that was previously 1528 * returned by {@link #onRetainNonConfigurationInstance()}. This will 1529 * be available from the initial {@link #onCreate} and 1530 * {@link #onStart} calls to the new instance, allowing you to extract 1531 * any useful dynamic state from the previous instance. 1532 * 1533 * <p>Note that the data you retrieve here should <em>only</em> be used 1534 * as an optimization for handling configuration changes. You should always 1535 * be able to handle getting a null pointer back, and an activity must 1536 * still be able to restore itself to its previous state (through the 1537 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1538 * function returns null. 1539 * 1540 * @return Returns the object previously returned by 1541 * {@link #onRetainNonConfigurationInstance()}. 1542 */ 1543 public Object getLastNonConfigurationInstance() { 1544 return mLastNonConfigurationInstance; 1545 } 1546 1547 /** 1548 * Called by the system, as part of destroying an 1549 * activity due to a configuration change, when it is known that a new 1550 * instance will immediately be created for the new configuration. You 1551 * can return any object you like here, including the activity instance 1552 * itself, which can later be retrieved by calling 1553 * {@link #getLastNonConfigurationInstance()} in the new activity 1554 * instance. 1555 * 1556 * <p>This function is called purely as an optimization, and you must 1557 * not rely on it being called. When it is called, a number of guarantees 1558 * will be made to help optimize configuration switching: 1559 * <ul> 1560 * <li> The function will be called between {@link #onStop} and 1561 * {@link #onDestroy}. 1562 * <li> A new instance of the activity will <em>always</em> be immediately 1563 * created after this one's {@link #onDestroy()} is called. 1564 * <li> The object you return here will <em>always</em> be available from 1565 * the {@link #getLastNonConfigurationInstance()} method of the following 1566 * activity instance as described there. 1567 * </ul> 1568 * 1569 * <p>These guarantees are designed so that an activity can use this API 1570 * to propagate extensive state from the old to new activity instance, from 1571 * loaded bitmaps, to network connections, to evenly actively running 1572 * threads. Note that you should <em>not</em> propagate any data that 1573 * may change based on the configuration, including any data loaded from 1574 * resources such as strings, layouts, or drawables. 1575 * 1576 * @return Return any Object holding the desired state to propagate to the 1577 * next activity instance. 1578 */ 1579 public Object onRetainNonConfigurationInstance() { 1580 return null; 1581 } 1582 1583 /** 1584 * Retrieve the non-configuration instance data that was previously 1585 * returned by {@link #onRetainNonConfigurationChildInstances()}. This will 1586 * be available from the initial {@link #onCreate} and 1587 * {@link #onStart} calls to the new instance, allowing you to extract 1588 * any useful dynamic state from the previous instance. 1589 * 1590 * <p>Note that the data you retrieve here should <em>only</em> be used 1591 * as an optimization for handling configuration changes. You should always 1592 * be able to handle getting a null pointer back, and an activity must 1593 * still be able to restore itself to its previous state (through the 1594 * normal {@link #onSaveInstanceState(Bundle)} mechanism) even if this 1595 * function returns null. 1596 * 1597 * @return Returns the object previously returned by 1598 * {@link #onRetainNonConfigurationChildInstances()} 1599 */ 1600 HashMap<String,Object> getLastNonConfigurationChildInstances() { 1601 return mLastNonConfigurationChildInstances; 1602 } 1603 1604 /** 1605 * This method is similar to {@link #onRetainNonConfigurationInstance()} except that 1606 * it should return either a mapping from child activity id strings to arbitrary objects, 1607 * or null. This method is intended to be used by Activity framework subclasses that control a 1608 * set of child activities, such as ActivityGroup. The same guarantees and restrictions apply 1609 * as for {@link #onRetainNonConfigurationInstance()}. The default implementation returns null. 1610 */ 1611 HashMap<String,Object> onRetainNonConfigurationChildInstances() { 1612 return null; 1613 } 1614 1615 public void onLowMemory() { 1616 mCalled = true; 1617 } 1618 1619 /** 1620 * Start a series of edit operations on the Fragments associated with 1621 * this activity. 1622 */ 1623 public FragmentTransaction openFragmentTransaction() { 1624 return new FragmentTransactionImpl(); 1625 } 1626 1627 /** 1628 * Wrapper around 1629 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1630 * that gives the resulting {@link Cursor} to call 1631 * {@link #startManagingCursor} so that the activity will manage its 1632 * lifecycle for you. 1633 * 1634 * @param uri The URI of the content provider to query. 1635 * @param projection List of columns to return. 1636 * @param selection SQL WHERE clause. 1637 * @param sortOrder SQL ORDER BY clause. 1638 * 1639 * @return The Cursor that was returned by query(). 1640 * 1641 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1642 * @see #startManagingCursor 1643 * @hide 1644 */ 1645 public final Cursor managedQuery(Uri uri, 1646 String[] projection, 1647 String selection, 1648 String sortOrder) 1649 { 1650 Cursor c = getContentResolver().query(uri, projection, selection, null, sortOrder); 1651 if (c != null) { 1652 startManagingCursor(c); 1653 } 1654 return c; 1655 } 1656 1657 /** 1658 * Wrapper around 1659 * {@link ContentResolver#query(android.net.Uri , String[], String, String[], String)} 1660 * that gives the resulting {@link Cursor} to call 1661 * {@link #startManagingCursor} so that the activity will manage its 1662 * lifecycle for you. 1663 * 1664 * @param uri The URI of the content provider to query. 1665 * @param projection List of columns to return. 1666 * @param selection SQL WHERE clause. 1667 * @param selectionArgs The arguments to selection, if any ?s are pesent 1668 * @param sortOrder SQL ORDER BY clause. 1669 * 1670 * @return The Cursor that was returned by query(). 1671 * 1672 * @see ContentResolver#query(android.net.Uri , String[], String, String[], String) 1673 * @see #startManagingCursor 1674 */ 1675 public final Cursor managedQuery(Uri uri, 1676 String[] projection, 1677 String selection, 1678 String[] selectionArgs, 1679 String sortOrder) 1680 { 1681 Cursor c = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder); 1682 if (c != null) { 1683 startManagingCursor(c); 1684 } 1685 return c; 1686 } 1687 1688 /** 1689 * Wrapper around {@link Cursor#commitUpdates()} that takes care of noting 1690 * that the Cursor needs to be requeried. You can call this method in 1691 * {@link #onPause} or {@link #onStop} to have the system call 1692 * {@link Cursor#requery} for you if the activity is later resumed. This 1693 * allows you to avoid determing when to do the requery yourself (which is 1694 * required for the Cursor to see any data changes that were committed with 1695 * it). 1696 * 1697 * @param c The Cursor whose changes are to be committed. 1698 * 1699 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1700 * @see #startManagingCursor 1701 * @see Cursor#commitUpdates() 1702 * @see Cursor#requery 1703 * @hide 1704 */ 1705 @Deprecated 1706 public void managedCommitUpdates(Cursor c) { 1707 synchronized (mManagedCursors) { 1708 final int N = mManagedCursors.size(); 1709 for (int i=0; i<N; i++) { 1710 ManagedCursor mc = mManagedCursors.get(i); 1711 if (mc.mCursor == c) { 1712 c.commitUpdates(); 1713 mc.mUpdated = true; 1714 return; 1715 } 1716 } 1717 throw new RuntimeException( 1718 "Cursor " + c + " is not currently managed"); 1719 } 1720 } 1721 1722 /** 1723 * This method allows the activity to take care of managing the given 1724 * {@link Cursor}'s lifecycle for you based on the activity's lifecycle. 1725 * That is, when the activity is stopped it will automatically call 1726 * {@link Cursor#deactivate} on the given Cursor, and when it is later restarted 1727 * it will call {@link Cursor#requery} for you. When the activity is 1728 * destroyed, all managed Cursors will be closed automatically. 1729 * 1730 * @param c The Cursor to be managed. 1731 * 1732 * @see #managedQuery(android.net.Uri , String[], String, String[], String) 1733 * @see #stopManagingCursor 1734 */ 1735 public void startManagingCursor(Cursor c) { 1736 synchronized (mManagedCursors) { 1737 mManagedCursors.add(new ManagedCursor(c)); 1738 } 1739 } 1740 1741 /** 1742 * Given a Cursor that was previously given to 1743 * {@link #startManagingCursor}, stop the activity's management of that 1744 * cursor. 1745 * 1746 * @param c The Cursor that was being managed. 1747 * 1748 * @see #startManagingCursor 1749 */ 1750 public void stopManagingCursor(Cursor c) { 1751 synchronized (mManagedCursors) { 1752 final int N = mManagedCursors.size(); 1753 for (int i=0; i<N; i++) { 1754 ManagedCursor mc = mManagedCursors.get(i); 1755 if (mc.mCursor == c) { 1756 mManagedCursors.remove(i); 1757 break; 1758 } 1759 } 1760 } 1761 } 1762 1763 /** 1764 * Control whether this activity is required to be persistent. By default 1765 * activities are not persistent; setting this to true will prevent the 1766 * system from stopping this activity or its process when running low on 1767 * resources. 1768 * 1769 * <p><em>You should avoid using this method</em>, it has severe negative 1770 * consequences on how well the system can manage its resources. A better 1771 * approach is to implement an application service that you control with 1772 * {@link Context#startService} and {@link Context#stopService}. 1773 * 1774 * @param isPersistent Control whether the current activity must be 1775 * persistent, true if so, false for the normal 1776 * behavior. 1777 */ 1778 public void setPersistent(boolean isPersistent) { 1779 if (mParent == null) { 1780 try { 1781 ActivityManagerNative.getDefault() 1782 .setPersistent(mToken, isPersistent); 1783 } catch (RemoteException e) { 1784 // Empty 1785 } 1786 } else { 1787 throw new RuntimeException("setPersistent() not yet supported for embedded activities"); 1788 } 1789 } 1790 1791 /** 1792 * Finds a view that was identified by the id attribute from the XML that 1793 * was processed in {@link #onCreate}. 1794 * 1795 * @return The view if found or null otherwise. 1796 */ 1797 public View findViewById(int id) { 1798 return getWindow().findViewById(id); 1799 } 1800 1801 /** 1802 * Retrieve a reference to this activity's ActionBar. 1803 * 1804 * <p><em>Note:</em> The ActionBar is initialized when a content view 1805 * is set. This function will return null if called before {@link #setContentView} 1806 * or {@link #addContentView}. 1807 * @return The Activity's ActionBar, or null if it does not have one. 1808 */ 1809 public ActionBar getActionBar() { 1810 return mActionBar; 1811 } 1812 1813 /** 1814 * Finds a fragment that was identified by the given id either when inflated 1815 * from XML or as the container ID when added in a transaction. This only 1816 * returns fragments that are currently added to the activity's content. 1817 * @return The fragment if found or null otherwise. 1818 */ 1819 public Fragment findFragmentById(int id) { 1820 return mFragments.findFragmentById(id); 1821 } 1822 1823 /** 1824 * Creates a new ActionBar, locates the inflated ActionBarView, 1825 * initializes the ActionBar with the view, and sets mActionBar. 1826 */ 1827 private void initActionBar() { 1828 if (!getWindow().hasFeature(Window.FEATURE_ACTION_BAR)) { 1829 return; 1830 } 1831 1832 ActionBarView view = (ActionBarView) findViewById(com.android.internal.R.id.action_bar); 1833 if (view != null) { 1834 LinearLayout splitView = 1835 (LinearLayout) findViewById(com.android.internal.R.id.context_action_bar); 1836 if (splitView != null) { 1837 mActionBar = new SplitActionBar(view, splitView); 1838 } 1839 } else { 1840 Log.e(TAG, "Could not create action bar; view not found in window decor."); 1841 } 1842 } 1843 1844 /** 1845 * Set the activity content from a layout resource. The resource will be 1846 * inflated, adding all top-level views to the activity. 1847 * 1848 * @param layoutResID Resource ID to be inflated. 1849 */ 1850 public void setContentView(int layoutResID) { 1851 getWindow().setContentView(layoutResID); 1852 initActionBar(); 1853 } 1854 1855 /** 1856 * Set the activity content to an explicit view. This view is placed 1857 * directly into the activity's view hierarchy. It can itself be a complex 1858 * view hierarhcy. 1859 * 1860 * @param view The desired content to display. 1861 */ 1862 public void setContentView(View view) { 1863 getWindow().setContentView(view); 1864 initActionBar(); 1865 } 1866 1867 /** 1868 * Set the activity content to an explicit view. This view is placed 1869 * directly into the activity's view hierarchy. It can itself be a complex 1870 * view hierarhcy. 1871 * 1872 * @param view The desired content to display. 1873 * @param params Layout parameters for the view. 1874 */ 1875 public void setContentView(View view, ViewGroup.LayoutParams params) { 1876 getWindow().setContentView(view, params); 1877 initActionBar(); 1878 } 1879 1880 /** 1881 * Add an additional content view to the activity. Added after any existing 1882 * ones in the activity -- existing views are NOT removed. 1883 * 1884 * @param view The desired content to display. 1885 * @param params Layout parameters for the view. 1886 */ 1887 public void addContentView(View view, ViewGroup.LayoutParams params) { 1888 getWindow().addContentView(view, params); 1889 initActionBar(); 1890 } 1891 1892 /** 1893 * Use with {@link #setDefaultKeyMode} to turn off default handling of 1894 * keys. 1895 * 1896 * @see #setDefaultKeyMode 1897 */ 1898 static public final int DEFAULT_KEYS_DISABLE = 0; 1899 /** 1900 * Use with {@link #setDefaultKeyMode} to launch the dialer during default 1901 * key handling. 1902 * 1903 * @see #setDefaultKeyMode 1904 */ 1905 static public final int DEFAULT_KEYS_DIALER = 1; 1906 /** 1907 * Use with {@link #setDefaultKeyMode} to execute a menu shortcut in 1908 * default key handling. 1909 * 1910 * <p>That is, the user does not need to hold down the menu key to execute menu shortcuts. 1911 * 1912 * @see #setDefaultKeyMode 1913 */ 1914 static public final int DEFAULT_KEYS_SHORTCUT = 2; 1915 /** 1916 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1917 * will start an application-defined search. (If the application or activity does not 1918 * actually define a search, the the keys will be ignored.) 1919 * 1920 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1921 * 1922 * @see #setDefaultKeyMode 1923 */ 1924 static public final int DEFAULT_KEYS_SEARCH_LOCAL = 3; 1925 1926 /** 1927 * Use with {@link #setDefaultKeyMode} to specify that unhandled keystrokes 1928 * will start a global search (typically web search, but some platforms may define alternate 1929 * methods for global search) 1930 * 1931 * <p>See {@link android.app.SearchManager android.app.SearchManager} for more details. 1932 * 1933 * @see #setDefaultKeyMode 1934 */ 1935 static public final int DEFAULT_KEYS_SEARCH_GLOBAL = 4; 1936 1937 /** 1938 * Select the default key handling for this activity. This controls what 1939 * will happen to key events that are not otherwise handled. The default 1940 * mode ({@link #DEFAULT_KEYS_DISABLE}) will simply drop them on the 1941 * floor. Other modes allow you to launch the dialer 1942 * ({@link #DEFAULT_KEYS_DIALER}), execute a shortcut in your options 1943 * menu without requiring the menu key be held down 1944 * ({@link #DEFAULT_KEYS_SHORTCUT}), or launch a search ({@link #DEFAULT_KEYS_SEARCH_LOCAL} 1945 * and {@link #DEFAULT_KEYS_SEARCH_GLOBAL}). 1946 * 1947 * <p>Note that the mode selected here does not impact the default 1948 * handling of system keys, such as the "back" and "menu" keys, and your 1949 * activity and its views always get a first chance to receive and handle 1950 * all application keys. 1951 * 1952 * @param mode The desired default key mode constant. 1953 * 1954 * @see #DEFAULT_KEYS_DISABLE 1955 * @see #DEFAULT_KEYS_DIALER 1956 * @see #DEFAULT_KEYS_SHORTCUT 1957 * @see #DEFAULT_KEYS_SEARCH_LOCAL 1958 * @see #DEFAULT_KEYS_SEARCH_GLOBAL 1959 * @see #onKeyDown 1960 */ 1961 public final void setDefaultKeyMode(int mode) { 1962 mDefaultKeyMode = mode; 1963 1964 // Some modes use a SpannableStringBuilder to track & dispatch input events 1965 // This list must remain in sync with the switch in onKeyDown() 1966 switch (mode) { 1967 case DEFAULT_KEYS_DISABLE: 1968 case DEFAULT_KEYS_SHORTCUT: 1969 mDefaultKeySsb = null; // not used in these modes 1970 break; 1971 case DEFAULT_KEYS_DIALER: 1972 case DEFAULT_KEYS_SEARCH_LOCAL: 1973 case DEFAULT_KEYS_SEARCH_GLOBAL: 1974 mDefaultKeySsb = new SpannableStringBuilder(); 1975 Selection.setSelection(mDefaultKeySsb,0); 1976 break; 1977 default: 1978 throw new IllegalArgumentException(); 1979 } 1980 } 1981 1982 /** 1983 * Called when a key was pressed down and not handled by any of the views 1984 * inside of the activity. So, for example, key presses while the cursor 1985 * is inside a TextView will not trigger the event (unless it is a navigation 1986 * to another object) because TextView handles its own key presses. 1987 * 1988 * <p>If the focused view didn't want this event, this method is called. 1989 * 1990 * <p>The default implementation takes care of {@link KeyEvent#KEYCODE_BACK} 1991 * by calling {@link #onBackPressed()}, though the behavior varies based 1992 * on the application compatibility mode: for 1993 * {@link android.os.Build.VERSION_CODES#ECLAIR} or later applications, 1994 * it will set up the dispatch to call {@link #onKeyUp} where the action 1995 * will be performed; for earlier applications, it will perform the 1996 * action immediately in on-down, as those versions of the platform 1997 * behaved. 1998 * 1999 * <p>Other additional default key handling may be performed 2000 * if configured with {@link #setDefaultKeyMode}. 2001 * 2002 * @return Return <code>true</code> to prevent this event from being propagated 2003 * further, or <code>false</code> to indicate that you have not handled 2004 * this event and it should continue to be propagated. 2005 * @see #onKeyUp 2006 * @see android.view.KeyEvent 2007 */ 2008 public boolean onKeyDown(int keyCode, KeyEvent event) { 2009 if (keyCode == KeyEvent.KEYCODE_BACK) { 2010 if (getApplicationInfo().targetSdkVersion 2011 >= Build.VERSION_CODES.ECLAIR) { 2012 event.startTracking(); 2013 } else { 2014 onBackPressed(); 2015 } 2016 return true; 2017 } 2018 2019 if (mDefaultKeyMode == DEFAULT_KEYS_DISABLE) { 2020 return false; 2021 } else if (mDefaultKeyMode == DEFAULT_KEYS_SHORTCUT) { 2022 if (getWindow().performPanelShortcut(Window.FEATURE_OPTIONS_PANEL, 2023 keyCode, event, Menu.FLAG_ALWAYS_PERFORM_CLOSE)) { 2024 return true; 2025 } 2026 return false; 2027 } else { 2028 // Common code for DEFAULT_KEYS_DIALER & DEFAULT_KEYS_SEARCH_* 2029 boolean clearSpannable = false; 2030 boolean handled; 2031 if ((event.getRepeatCount() != 0) || event.isSystem()) { 2032 clearSpannable = true; 2033 handled = false; 2034 } else { 2035 handled = TextKeyListener.getInstance().onKeyDown( 2036 null, mDefaultKeySsb, keyCode, event); 2037 if (handled && mDefaultKeySsb.length() > 0) { 2038 // something useable has been typed - dispatch it now. 2039 2040 final String str = mDefaultKeySsb.toString(); 2041 clearSpannable = true; 2042 2043 switch (mDefaultKeyMode) { 2044 case DEFAULT_KEYS_DIALER: 2045 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + str)); 2046 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2047 startActivity(intent); 2048 break; 2049 case DEFAULT_KEYS_SEARCH_LOCAL: 2050 startSearch(str, false, null, false); 2051 break; 2052 case DEFAULT_KEYS_SEARCH_GLOBAL: 2053 startSearch(str, false, null, true); 2054 break; 2055 } 2056 } 2057 } 2058 if (clearSpannable) { 2059 mDefaultKeySsb.clear(); 2060 mDefaultKeySsb.clearSpans(); 2061 Selection.setSelection(mDefaultKeySsb,0); 2062 } 2063 return handled; 2064 } 2065 } 2066 2067 /** 2068 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 2069 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 2070 * the event). 2071 */ 2072 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 2073 return false; 2074 } 2075 2076 /** 2077 * Called when a key was released and not handled by any of the views 2078 * inside of the activity. So, for example, key presses while the cursor 2079 * is inside a TextView will not trigger the event (unless it is a navigation 2080 * to another object) because TextView handles its own key presses. 2081 * 2082 * <p>The default implementation handles KEYCODE_BACK to stop the activity 2083 * and go back. 2084 * 2085 * @return Return <code>true</code> to prevent this event from being propagated 2086 * further, or <code>false</code> to indicate that you have not handled 2087 * this event and it should continue to be propagated. 2088 * @see #onKeyDown 2089 * @see KeyEvent 2090 */ 2091 public boolean onKeyUp(int keyCode, KeyEvent event) { 2092 if (getApplicationInfo().targetSdkVersion 2093 >= Build.VERSION_CODES.ECLAIR) { 2094 if (keyCode == KeyEvent.KEYCODE_BACK && event.isTracking() 2095 && !event.isCanceled()) { 2096 onBackPressed(); 2097 return true; 2098 } 2099 } 2100 return false; 2101 } 2102 2103 /** 2104 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 2105 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 2106 * the event). 2107 */ 2108 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 2109 return false; 2110 } 2111 2112 /** 2113 * Pop the last fragment transition from the local activity's fragment 2114 * back stack. If there is nothing to pop, false is returned. 2115 * @param name If non-null, this is the name of a previous back state 2116 * to look for; if found, all states up to (but not including) that 2117 * state will be popped. If null, only the top state is popped. 2118 */ 2119 public boolean popBackStack(String name) { 2120 return mFragments.popBackStackState(mHandler, name); 2121 } 2122 2123 /** 2124 * Called when the activity has detected the user's press of the back 2125 * key. The default implementation simply finishes the current activity, 2126 * but you can override this to do whatever you want. 2127 */ 2128 public void onBackPressed() { 2129 if (!popBackStack(null)) { 2130 finish(); 2131 } 2132 } 2133 2134 /** 2135 * Called when a touch screen event was not handled by any of the views 2136 * under it. This is most useful to process touch events that happen 2137 * outside of your window bounds, where there is no view to receive it. 2138 * 2139 * @param event The touch screen event being processed. 2140 * 2141 * @return Return true if you have consumed the event, false if you haven't. 2142 * The default implementation always returns false. 2143 */ 2144 public boolean onTouchEvent(MotionEvent event) { 2145 return false; 2146 } 2147 2148 /** 2149 * Called when the trackball was moved and not handled by any of the 2150 * views inside of the activity. So, for example, if the trackball moves 2151 * while focus is on a button, you will receive a call here because 2152 * buttons do not normally do anything with trackball events. The call 2153 * here happens <em>before</em> trackball movements are converted to 2154 * DPAD key events, which then get sent back to the view hierarchy, and 2155 * will be processed at the point for things like focus navigation. 2156 * 2157 * @param event The trackball event being processed. 2158 * 2159 * @return Return true if you have consumed the event, false if you haven't. 2160 * The default implementation always returns false. 2161 */ 2162 public boolean onTrackballEvent(MotionEvent event) { 2163 return false; 2164 } 2165 2166 /** 2167 * Called whenever a key, touch, or trackball event is dispatched to the 2168 * activity. Implement this method if you wish to know that the user has 2169 * interacted with the device in some way while your activity is running. 2170 * This callback and {@link #onUserLeaveHint} are intended to help 2171 * activities manage status bar notifications intelligently; specifically, 2172 * for helping activities determine the proper time to cancel a notfication. 2173 * 2174 * <p>All calls to your activity's {@link #onUserLeaveHint} callback will 2175 * be accompanied by calls to {@link #onUserInteraction}. This 2176 * ensures that your activity will be told of relevant user activity such 2177 * as pulling down the notification pane and touching an item there. 2178 * 2179 * <p>Note that this callback will be invoked for the touch down action 2180 * that begins a touch gesture, but may not be invoked for the touch-moved 2181 * and touch-up actions that follow. 2182 * 2183 * @see #onUserLeaveHint() 2184 */ 2185 public void onUserInteraction() { 2186 } 2187 2188 public void onWindowAttributesChanged(WindowManager.LayoutParams params) { 2189 // Update window manager if: we have a view, that view is 2190 // attached to its parent (which will be a RootView), and 2191 // this activity is not embedded. 2192 if (mParent == null) { 2193 View decor = mDecor; 2194 if (decor != null && decor.getParent() != null) { 2195 getWindowManager().updateViewLayout(decor, params); 2196 } 2197 } 2198 } 2199 2200 public void onContentChanged() { 2201 } 2202 2203 /** 2204 * Called when the current {@link Window} of the activity gains or loses 2205 * focus. This is the best indicator of whether this activity is visible 2206 * to the user. The default implementation clears the key tracking 2207 * state, so should always be called. 2208 * 2209 * <p>Note that this provides information about global focus state, which 2210 * is managed independently of activity lifecycles. As such, while focus 2211 * changes will generally have some relation to lifecycle changes (an 2212 * activity that is stopped will not generally get window focus), you 2213 * should not rely on any particular order between the callbacks here and 2214 * those in the other lifecycle methods such as {@link #onResume}. 2215 * 2216 * <p>As a general rule, however, a resumed activity will have window 2217 * focus... unless it has displayed other dialogs or popups that take 2218 * input focus, in which case the activity itself will not have focus 2219 * when the other windows have it. Likewise, the system may display 2220 * system-level windows (such as the status bar notification panel or 2221 * a system alert) which will temporarily take window input focus without 2222 * pausing the foreground activity. 2223 * 2224 * @param hasFocus Whether the window of this activity has focus. 2225 * 2226 * @see #hasWindowFocus() 2227 * @see #onResume 2228 * @see View#onWindowFocusChanged(boolean) 2229 */ 2230 public void onWindowFocusChanged(boolean hasFocus) { 2231 } 2232 2233 /** 2234 * Called when the main window associated with the activity has been 2235 * attached to the window manager. 2236 * See {@link View#onAttachedToWindow() View.onAttachedToWindow()} 2237 * for more information. 2238 * @see View#onAttachedToWindow 2239 */ 2240 public void onAttachedToWindow() { 2241 } 2242 2243 /** 2244 * Called when the main window associated with the activity has been 2245 * detached from the window manager. 2246 * See {@link View#onDetachedFromWindow() View.onDetachedFromWindow()} 2247 * for more information. 2248 * @see View#onDetachedFromWindow 2249 */ 2250 public void onDetachedFromWindow() { 2251 } 2252 2253 /** 2254 * Returns true if this activity's <em>main</em> window currently has window focus. 2255 * Note that this is not the same as the view itself having focus. 2256 * 2257 * @return True if this activity's main window currently has window focus. 2258 * 2259 * @see #onWindowAttributesChanged(android.view.WindowManager.LayoutParams) 2260 */ 2261 public boolean hasWindowFocus() { 2262 Window w = getWindow(); 2263 if (w != null) { 2264 View d = w.getDecorView(); 2265 if (d != null) { 2266 return d.hasWindowFocus(); 2267 } 2268 } 2269 return false; 2270 } 2271 2272 /** 2273 * Called to process key events. You can override this to intercept all 2274 * key events before they are dispatched to the window. Be sure to call 2275 * this implementation for key events that should be handled normally. 2276 * 2277 * @param event The key event. 2278 * 2279 * @return boolean Return true if this event was consumed. 2280 */ 2281 public boolean dispatchKeyEvent(KeyEvent event) { 2282 onUserInteraction(); 2283 Window win = getWindow(); 2284 if (win.superDispatchKeyEvent(event)) { 2285 return true; 2286 } 2287 View decor = mDecor; 2288 if (decor == null) decor = win.getDecorView(); 2289 return event.dispatch(this, decor != null 2290 ? decor.getKeyDispatcherState() : null, this); 2291 } 2292 2293 /** 2294 * Called to process touch screen events. You can override this to 2295 * intercept all touch screen events before they are dispatched to the 2296 * window. Be sure to call this implementation for touch screen events 2297 * that should be handled normally. 2298 * 2299 * @param ev The touch screen event. 2300 * 2301 * @return boolean Return true if this event was consumed. 2302 */ 2303 public boolean dispatchTouchEvent(MotionEvent ev) { 2304 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 2305 onUserInteraction(); 2306 } 2307 if (getWindow().superDispatchTouchEvent(ev)) { 2308 return true; 2309 } 2310 return onTouchEvent(ev); 2311 } 2312 2313 /** 2314 * Called to process trackball events. You can override this to 2315 * intercept all trackball events before they are dispatched to the 2316 * window. Be sure to call this implementation for trackball events 2317 * that should be handled normally. 2318 * 2319 * @param ev The trackball event. 2320 * 2321 * @return boolean Return true if this event was consumed. 2322 */ 2323 public boolean dispatchTrackballEvent(MotionEvent ev) { 2324 onUserInteraction(); 2325 if (getWindow().superDispatchTrackballEvent(ev)) { 2326 return true; 2327 } 2328 return onTrackballEvent(ev); 2329 } 2330 2331 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 2332 event.setClassName(getClass().getName()); 2333 event.setPackageName(getPackageName()); 2334 2335 LayoutParams params = getWindow().getAttributes(); 2336 boolean isFullScreen = (params.width == LayoutParams.MATCH_PARENT) && 2337 (params.height == LayoutParams.MATCH_PARENT); 2338 event.setFullScreen(isFullScreen); 2339 2340 CharSequence title = getTitle(); 2341 if (!TextUtils.isEmpty(title)) { 2342 event.getText().add(title); 2343 } 2344 2345 return true; 2346 } 2347 2348 /** 2349 * Default implementation of 2350 * {@link android.view.Window.Callback#onCreatePanelView} 2351 * for activities. This 2352 * simply returns null so that all panel sub-windows will have the default 2353 * menu behavior. 2354 */ 2355 public View onCreatePanelView(int featureId) { 2356 return null; 2357 } 2358 2359 /** 2360 * Default implementation of 2361 * {@link android.view.Window.Callback#onCreatePanelMenu} 2362 * for activities. This calls through to the new 2363 * {@link #onCreateOptionsMenu} method for the 2364 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2365 * so that subclasses of Activity don't need to deal with feature codes. 2366 */ 2367 public boolean onCreatePanelMenu(int featureId, Menu menu) { 2368 if (featureId == Window.FEATURE_OPTIONS_PANEL) { 2369 return onCreateOptionsMenu(menu); 2370 } 2371 return false; 2372 } 2373 2374 /** 2375 * Default implementation of 2376 * {@link android.view.Window.Callback#onPreparePanel} 2377 * for activities. This 2378 * calls through to the new {@link #onPrepareOptionsMenu} method for the 2379 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2380 * panel, so that subclasses of 2381 * Activity don't need to deal with feature codes. 2382 */ 2383 public boolean onPreparePanel(int featureId, View view, Menu menu) { 2384 if (featureId == Window.FEATURE_OPTIONS_PANEL && menu != null) { 2385 boolean goforit = onPrepareOptionsMenu(menu); 2386 return goforit && menu.hasVisibleItems(); 2387 } 2388 return true; 2389 } 2390 2391 /** 2392 * {@inheritDoc} 2393 * 2394 * @return The default implementation returns true. 2395 */ 2396 public boolean onMenuOpened(int featureId, Menu menu) { 2397 return true; 2398 } 2399 2400 /** 2401 * Default implementation of 2402 * {@link android.view.Window.Callback#onMenuItemSelected} 2403 * for activities. This calls through to the new 2404 * {@link #onOptionsItemSelected} method for the 2405 * {@link android.view.Window#FEATURE_OPTIONS_PANEL} 2406 * panel, so that subclasses of 2407 * Activity don't need to deal with feature codes. 2408 */ 2409 public boolean onMenuItemSelected(int featureId, MenuItem item) { 2410 switch (featureId) { 2411 case Window.FEATURE_OPTIONS_PANEL: 2412 // Put event logging here so it gets called even if subclass 2413 // doesn't call through to superclass's implmeentation of each 2414 // of these methods below 2415 EventLog.writeEvent(50000, 0, item.getTitleCondensed()); 2416 return onOptionsItemSelected(item); 2417 2418 case Window.FEATURE_CONTEXT_MENU: 2419 EventLog.writeEvent(50000, 1, item.getTitleCondensed()); 2420 return onContextItemSelected(item); 2421 2422 default: 2423 return false; 2424 } 2425 } 2426 2427 /** 2428 * Default implementation of 2429 * {@link android.view.Window.Callback#onPanelClosed(int, Menu)} for 2430 * activities. This calls through to {@link #onOptionsMenuClosed(Menu)} 2431 * method for the {@link android.view.Window#FEATURE_OPTIONS_PANEL} panel, 2432 * so that subclasses of Activity don't need to deal with feature codes. 2433 * For context menus ({@link Window#FEATURE_CONTEXT_MENU}), the 2434 * {@link #onContextMenuClosed(Menu)} will be called. 2435 */ 2436 public void onPanelClosed(int featureId, Menu menu) { 2437 switch (featureId) { 2438 case Window.FEATURE_OPTIONS_PANEL: 2439 onOptionsMenuClosed(menu); 2440 break; 2441 2442 case Window.FEATURE_CONTEXT_MENU: 2443 onContextMenuClosed(menu); 2444 break; 2445 } 2446 } 2447 2448 /** 2449 * Initialize the contents of the Activity's standard options menu. You 2450 * should place your menu items in to <var>menu</var>. 2451 * 2452 * <p>This is only called once, the first time the options menu is 2453 * displayed. To update the menu every time it is displayed, see 2454 * {@link #onPrepareOptionsMenu}. 2455 * 2456 * <p>The default implementation populates the menu with standard system 2457 * menu items. These are placed in the {@link Menu#CATEGORY_SYSTEM} group so that 2458 * they will be correctly ordered with application-defined menu items. 2459 * Deriving classes should always call through to the base implementation. 2460 * 2461 * <p>You can safely hold on to <var>menu</var> (and any items created 2462 * from it), making modifications to it as desired, until the next 2463 * time onCreateOptionsMenu() is called. 2464 * 2465 * <p>When you add items to the menu, you can implement the Activity's 2466 * {@link #onOptionsItemSelected} method to handle them there. 2467 * 2468 * @param menu The options menu in which you place your items. 2469 * 2470 * @return You must return true for the menu to be displayed; 2471 * if you return false it will not be shown. 2472 * 2473 * @see #onPrepareOptionsMenu 2474 * @see #onOptionsItemSelected 2475 */ 2476 public boolean onCreateOptionsMenu(Menu menu) { 2477 if (mParent != null) { 2478 return mParent.onCreateOptionsMenu(menu); 2479 } 2480 return true; 2481 } 2482 2483 /** 2484 * Prepare the Screen's standard options menu to be displayed. This is 2485 * called right before the menu is shown, every time it is shown. You can 2486 * use this method to efficiently enable/disable items or otherwise 2487 * dynamically modify the contents. 2488 * 2489 * <p>The default implementation updates the system menu items based on the 2490 * activity's state. Deriving classes should always call through to the 2491 * base class implementation. 2492 * 2493 * @param menu The options menu as last shown or first initialized by 2494 * onCreateOptionsMenu(). 2495 * 2496 * @return You must return true for the menu to be displayed; 2497 * if you return false it will not be shown. 2498 * 2499 * @see #onCreateOptionsMenu 2500 */ 2501 public boolean onPrepareOptionsMenu(Menu menu) { 2502 if (mParent != null) { 2503 return mParent.onPrepareOptionsMenu(menu); 2504 } 2505 return true; 2506 } 2507 2508 /** 2509 * This hook is called whenever an item in your options menu is selected. 2510 * The default implementation simply returns false to have the normal 2511 * processing happen (calling the item's Runnable or sending a message to 2512 * its Handler as appropriate). You can use this method for any items 2513 * for which you would like to do processing without those other 2514 * facilities. 2515 * 2516 * <p>Derived classes should call through to the base class for it to 2517 * perform the default menu handling. 2518 * 2519 * @param item The menu item that was selected. 2520 * 2521 * @return boolean Return false to allow normal menu processing to 2522 * proceed, true to consume it here. 2523 * 2524 * @see #onCreateOptionsMenu 2525 */ 2526 public boolean onOptionsItemSelected(MenuItem item) { 2527 if (mParent != null) { 2528 return mParent.onOptionsItemSelected(item); 2529 } 2530 return false; 2531 } 2532 2533 /** 2534 * This hook is called whenever the options menu is being closed (either by the user canceling 2535 * the menu with the back/menu button, or when an item is selected). 2536 * 2537 * @param menu The options menu as last shown or first initialized by 2538 * onCreateOptionsMenu(). 2539 */ 2540 public void onOptionsMenuClosed(Menu menu) { 2541 if (mParent != null) { 2542 mParent.onOptionsMenuClosed(menu); 2543 } 2544 } 2545 2546 /** 2547 * Programmatically opens the options menu. If the options menu is already 2548 * open, this method does nothing. 2549 */ 2550 public void openOptionsMenu() { 2551 mWindow.openPanel(Window.FEATURE_OPTIONS_PANEL, null); 2552 } 2553 2554 /** 2555 * Progammatically closes the options menu. If the options menu is already 2556 * closed, this method does nothing. 2557 */ 2558 public void closeOptionsMenu() { 2559 mWindow.closePanel(Window.FEATURE_OPTIONS_PANEL); 2560 } 2561 2562 /** 2563 * Called when a context menu for the {@code view} is about to be shown. 2564 * Unlike {@link #onCreateOptionsMenu(Menu)}, this will be called every 2565 * time the context menu is about to be shown and should be populated for 2566 * the view (or item inside the view for {@link AdapterView} subclasses, 2567 * this can be found in the {@code menuInfo})). 2568 * <p> 2569 * Use {@link #onContextItemSelected(android.view.MenuItem)} to know when an 2570 * item has been selected. 2571 * <p> 2572 * It is not safe to hold onto the context menu after this method returns. 2573 * {@inheritDoc} 2574 */ 2575 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { 2576 } 2577 2578 /** 2579 * Registers a context menu to be shown for the given view (multiple views 2580 * can show the context menu). This method will set the 2581 * {@link OnCreateContextMenuListener} on the view to this activity, so 2582 * {@link #onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} will be 2583 * called when it is time to show the context menu. 2584 * 2585 * @see #unregisterForContextMenu(View) 2586 * @param view The view that should show a context menu. 2587 */ 2588 public void registerForContextMenu(View view) { 2589 view.setOnCreateContextMenuListener(this); 2590 } 2591 2592 /** 2593 * Prevents a context menu to be shown for the given view. This method will remove the 2594 * {@link OnCreateContextMenuListener} on the view. 2595 * 2596 * @see #registerForContextMenu(View) 2597 * @param view The view that should stop showing a context menu. 2598 */ 2599 public void unregisterForContextMenu(View view) { 2600 view.setOnCreateContextMenuListener(null); 2601 } 2602 2603 /** 2604 * Programmatically opens the context menu for a particular {@code view}. 2605 * The {@code view} should have been added via 2606 * {@link #registerForContextMenu(View)}. 2607 * 2608 * @param view The view to show the context menu for. 2609 */ 2610 public void openContextMenu(View view) { 2611 view.showContextMenu(); 2612 } 2613 2614 /** 2615 * Programmatically closes the most recently opened context menu, if showing. 2616 */ 2617 public void closeContextMenu() { 2618 mWindow.closePanel(Window.FEATURE_CONTEXT_MENU); 2619 } 2620 2621 /** 2622 * This hook is called whenever an item in a context menu is selected. The 2623 * default implementation simply returns false to have the normal processing 2624 * happen (calling the item's Runnable or sending a message to its Handler 2625 * as appropriate). You can use this method for any items for which you 2626 * would like to do processing without those other facilities. 2627 * <p> 2628 * Use {@link MenuItem#getMenuInfo()} to get extra information set by the 2629 * View that added this menu item. 2630 * <p> 2631 * Derived classes should call through to the base class for it to perform 2632 * the default menu handling. 2633 * 2634 * @param item The context menu item that was selected. 2635 * @return boolean Return false to allow normal context menu processing to 2636 * proceed, true to consume it here. 2637 */ 2638 public boolean onContextItemSelected(MenuItem item) { 2639 if (mParent != null) { 2640 return mParent.onContextItemSelected(item); 2641 } 2642 return false; 2643 } 2644 2645 /** 2646 * This hook is called whenever the context menu is being closed (either by 2647 * the user canceling the menu with the back/menu button, or when an item is 2648 * selected). 2649 * 2650 * @param menu The context menu that is being closed. 2651 */ 2652 public void onContextMenuClosed(Menu menu) { 2653 if (mParent != null) { 2654 mParent.onContextMenuClosed(menu); 2655 } 2656 } 2657 2658 /** 2659 * @deprecated Old no-arguments version of {@link #onCreateDialog(int, Bundle)}. 2660 */ 2661 @Deprecated 2662 protected Dialog onCreateDialog(int id) { 2663 return null; 2664 } 2665 2666 /** 2667 * Callback for creating dialogs that are managed (saved and restored) for you 2668 * by the activity. The default implementation calls through to 2669 * {@link #onCreateDialog(int)} for compatibility. 2670 * 2671 * <p>If you use {@link #showDialog(int)}, the activity will call through to 2672 * this method the first time, and hang onto it thereafter. Any dialog 2673 * that is created by this method will automatically be saved and restored 2674 * for you, including whether it is showing. 2675 * 2676 * <p>If you would like the activity to manage saving and restoring dialogs 2677 * for you, you should override this method and handle any ids that are 2678 * passed to {@link #showDialog}. 2679 * 2680 * <p>If you would like an opportunity to prepare your dialog before it is shown, 2681 * override {@link #onPrepareDialog(int, Dialog, Bundle)}. 2682 * 2683 * @param id The id of the dialog. 2684 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2685 * @return The dialog. If you return null, the dialog will not be created. 2686 * 2687 * @see #onPrepareDialog(int, Dialog, Bundle) 2688 * @see #showDialog(int, Bundle) 2689 * @see #dismissDialog(int) 2690 * @see #removeDialog(int) 2691 */ 2692 protected Dialog onCreateDialog(int id, Bundle args) { 2693 return onCreateDialog(id); 2694 } 2695 2696 /** 2697 * @deprecated Old no-arguments version of 2698 * {@link #onPrepareDialog(int, Dialog, Bundle)}. 2699 */ 2700 @Deprecated 2701 protected void onPrepareDialog(int id, Dialog dialog) { 2702 dialog.setOwnerActivity(this); 2703 } 2704 2705 /** 2706 * Provides an opportunity to prepare a managed dialog before it is being 2707 * shown. The default implementation calls through to 2708 * {@link #onPrepareDialog(int, Dialog)} for compatibility. 2709 * 2710 * <p> 2711 * Override this if you need to update a managed dialog based on the state 2712 * of the application each time it is shown. For example, a time picker 2713 * dialog might want to be updated with the current time. You should call 2714 * through to the superclass's implementation. The default implementation 2715 * will set this Activity as the owner activity on the Dialog. 2716 * 2717 * @param id The id of the managed dialog. 2718 * @param dialog The dialog. 2719 * @param args The dialog arguments provided to {@link #showDialog(int, Bundle)}. 2720 * @see #onCreateDialog(int, Bundle) 2721 * @see #showDialog(int) 2722 * @see #dismissDialog(int) 2723 * @see #removeDialog(int) 2724 */ 2725 protected void onPrepareDialog(int id, Dialog dialog, Bundle args) { 2726 onPrepareDialog(id, dialog); 2727 } 2728 2729 /** 2730 * Simple version of {@link #showDialog(int, Bundle)} that does not 2731 * take any arguments. Simply calls {@link #showDialog(int, Bundle)} 2732 * with null arguments. 2733 */ 2734 public final void showDialog(int id) { 2735 showDialog(id, null); 2736 } 2737 2738 /** 2739 * Show a dialog managed by this activity. A call to {@link #onCreateDialog(int, Bundle)} 2740 * will be made with the same id the first time this is called for a given 2741 * id. From thereafter, the dialog will be automatically saved and restored. 2742 * 2743 * <p>Each time a dialog is shown, {@link #onPrepareDialog(int, Dialog, Bundle)} will 2744 * be made to provide an opportunity to do any timely preparation. 2745 * 2746 * @param id The id of the managed dialog. 2747 * @param args Arguments to pass through to the dialog. These will be saved 2748 * and restored for you. Note that if the dialog is already created, 2749 * {@link #onCreateDialog(int, Bundle)} will not be called with the new 2750 * arguments but {@link #onPrepareDialog(int, Dialog, Bundle)} will be. 2751 * If you need to rebuild the dialog, call {@link #removeDialog(int)} first. 2752 * @return Returns true if the Dialog was created; false is returned if 2753 * it is not created because {@link #onCreateDialog(int, Bundle)} returns false. 2754 * 2755 * @see Dialog 2756 * @see #onCreateDialog(int, Bundle) 2757 * @see #onPrepareDialog(int, Dialog, Bundle) 2758 * @see #dismissDialog(int) 2759 * @see #removeDialog(int) 2760 */ 2761 public final boolean showDialog(int id, Bundle args) { 2762 if (mManagedDialogs == null) { 2763 mManagedDialogs = new SparseArray<ManagedDialog>(); 2764 } 2765 ManagedDialog md = mManagedDialogs.get(id); 2766 if (md == null) { 2767 md = new ManagedDialog(); 2768 md.mDialog = createDialog(id, null, args); 2769 if (md.mDialog == null) { 2770 return false; 2771 } 2772 mManagedDialogs.put(id, md); 2773 } 2774 2775 md.mArgs = args; 2776 onPrepareDialog(id, md.mDialog, args); 2777 md.mDialog.show(); 2778 return true; 2779 } 2780 2781 /** 2782 * Dismiss a dialog that was previously shown via {@link #showDialog(int)}. 2783 * 2784 * @param id The id of the managed dialog. 2785 * 2786 * @throws IllegalArgumentException if the id was not previously shown via 2787 * {@link #showDialog(int)}. 2788 * 2789 * @see #onCreateDialog(int, Bundle) 2790 * @see #onPrepareDialog(int, Dialog, Bundle) 2791 * @see #showDialog(int) 2792 * @see #removeDialog(int) 2793 */ 2794 public final void dismissDialog(int id) { 2795 if (mManagedDialogs == null) { 2796 throw missingDialog(id); 2797 } 2798 2799 final ManagedDialog md = mManagedDialogs.get(id); 2800 if (md == null) { 2801 throw missingDialog(id); 2802 } 2803 md.mDialog.dismiss(); 2804 } 2805 2806 /** 2807 * Creates an exception to throw if a user passed in a dialog id that is 2808 * unexpected. 2809 */ 2810 private IllegalArgumentException missingDialog(int id) { 2811 return new IllegalArgumentException("no dialog with id " + id + " was ever " 2812 + "shown via Activity#showDialog"); 2813 } 2814 2815 /** 2816 * Removes any internal references to a dialog managed by this Activity. 2817 * If the dialog is showing, it will dismiss it as part of the clean up. 2818 * 2819 * <p>This can be useful if you know that you will never show a dialog again and 2820 * want to avoid the overhead of saving and restoring it in the future. 2821 * 2822 * @param id The id of the managed dialog. 2823 * 2824 * @see #onCreateDialog(int, Bundle) 2825 * @see #onPrepareDialog(int, Dialog, Bundle) 2826 * @see #showDialog(int) 2827 * @see #dismissDialog(int) 2828 */ 2829 public final void removeDialog(int id) { 2830 if (mManagedDialogs == null) { 2831 return; 2832 } 2833 2834 final ManagedDialog md = mManagedDialogs.get(id); 2835 if (md == null) { 2836 return; 2837 } 2838 2839 md.mDialog.dismiss(); 2840 mManagedDialogs.remove(id); 2841 } 2842 2843 /** 2844 * This hook is called when the user signals the desire to start a search. 2845 * 2846 * <p>You can use this function as a simple way to launch the search UI, in response to a 2847 * menu item, search button, or other widgets within your activity. Unless overidden, 2848 * calling this function is the same as calling 2849 * {@link #startSearch startSearch(null, false, null, false)}, which launches 2850 * search for the current activity as specified in its manifest, see {@link SearchManager}. 2851 * 2852 * <p>You can override this function to force global search, e.g. in response to a dedicated 2853 * search key, or to block search entirely (by simply returning false). 2854 * 2855 * @return Returns {@code true} if search launched, and {@code false} if activity blocks it. 2856 * The default implementation always returns {@code true}. 2857 * 2858 * @see android.app.SearchManager 2859 */ 2860 public boolean onSearchRequested() { 2861 startSearch(null, false, null, false); 2862 return true; 2863 } 2864 2865 /** 2866 * This hook is called to launch the search UI. 2867 * 2868 * <p>It is typically called from onSearchRequested(), either directly from 2869 * Activity.onSearchRequested() or from an overridden version in any given 2870 * Activity. If your goal is simply to activate search, it is preferred to call 2871 * onSearchRequested(), which may have been overriden elsewhere in your Activity. If your goal 2872 * is to inject specific data such as context data, it is preferred to <i>override</i> 2873 * onSearchRequested(), so that any callers to it will benefit from the override. 2874 * 2875 * @param initialQuery Any non-null non-empty string will be inserted as 2876 * pre-entered text in the search query box. 2877 * @param selectInitialQuery If true, the intial query will be preselected, which means that 2878 * any further typing will replace it. This is useful for cases where an entire pre-formed 2879 * query is being inserted. If false, the selection point will be placed at the end of the 2880 * inserted query. This is useful when the inserted query is text that the user entered, 2881 * and the user would expect to be able to keep typing. <i>This parameter is only meaningful 2882 * if initialQuery is a non-empty string.</i> 2883 * @param appSearchData An application can insert application-specific 2884 * context here, in order to improve quality or specificity of its own 2885 * searches. This data will be returned with SEARCH intent(s). Null if 2886 * no extra data is required. 2887 * @param globalSearch If false, this will only launch the search that has been specifically 2888 * defined by the application (which is usually defined as a local search). If no default 2889 * search is defined in the current application or activity, global search will be launched. 2890 * If true, this will always launch a platform-global (e.g. web-based) search instead. 2891 * 2892 * @see android.app.SearchManager 2893 * @see #onSearchRequested 2894 */ 2895 public void startSearch(String initialQuery, boolean selectInitialQuery, 2896 Bundle appSearchData, boolean globalSearch) { 2897 ensureSearchManager(); 2898 mSearchManager.startSearch(initialQuery, selectInitialQuery, getComponentName(), 2899 appSearchData, globalSearch); 2900 } 2901 2902 /** 2903 * Similar to {@link #startSearch}, but actually fires off the search query after invoking 2904 * the search dialog. Made available for testing purposes. 2905 * 2906 * @param query The query to trigger. If empty, the request will be ignored. 2907 * @param appSearchData An application can insert application-specific 2908 * context here, in order to improve quality or specificity of its own 2909 * searches. This data will be returned with SEARCH intent(s). Null if 2910 * no extra data is required. 2911 */ 2912 public void triggerSearch(String query, Bundle appSearchData) { 2913 ensureSearchManager(); 2914 mSearchManager.triggerSearch(query, getComponentName(), appSearchData); 2915 } 2916 2917 /** 2918 * Request that key events come to this activity. Use this if your 2919 * activity has no views with focus, but the activity still wants 2920 * a chance to process key events. 2921 * 2922 * @see android.view.Window#takeKeyEvents 2923 */ 2924 public void takeKeyEvents(boolean get) { 2925 getWindow().takeKeyEvents(get); 2926 } 2927 2928 /** 2929 * Enable extended window features. This is a convenience for calling 2930 * {@link android.view.Window#requestFeature getWindow().requestFeature()}. 2931 * 2932 * @param featureId The desired feature as defined in 2933 * {@link android.view.Window}. 2934 * @return Returns true if the requested feature is supported and now 2935 * enabled. 2936 * 2937 * @see android.view.Window#requestFeature 2938 */ 2939 public final boolean requestWindowFeature(int featureId) { 2940 return getWindow().requestFeature(featureId); 2941 } 2942 2943 /** 2944 * Convenience for calling 2945 * {@link android.view.Window#setFeatureDrawableResource}. 2946 */ 2947 public final void setFeatureDrawableResource(int featureId, int resId) { 2948 getWindow().setFeatureDrawableResource(featureId, resId); 2949 } 2950 2951 /** 2952 * Convenience for calling 2953 * {@link android.view.Window#setFeatureDrawableUri}. 2954 */ 2955 public final void setFeatureDrawableUri(int featureId, Uri uri) { 2956 getWindow().setFeatureDrawableUri(featureId, uri); 2957 } 2958 2959 /** 2960 * Convenience for calling 2961 * {@link android.view.Window#setFeatureDrawable(int, Drawable)}. 2962 */ 2963 public final void setFeatureDrawable(int featureId, Drawable drawable) { 2964 getWindow().setFeatureDrawable(featureId, drawable); 2965 } 2966 2967 /** 2968 * Convenience for calling 2969 * {@link android.view.Window#setFeatureDrawableAlpha}. 2970 */ 2971 public final void setFeatureDrawableAlpha(int featureId, int alpha) { 2972 getWindow().setFeatureDrawableAlpha(featureId, alpha); 2973 } 2974 2975 /** 2976 * Convenience for calling 2977 * {@link android.view.Window#getLayoutInflater}. 2978 */ 2979 public LayoutInflater getLayoutInflater() { 2980 return getWindow().getLayoutInflater(); 2981 } 2982 2983 /** 2984 * Returns a {@link MenuInflater} with this context. 2985 */ 2986 public MenuInflater getMenuInflater() { 2987 return new MenuInflater(this); 2988 } 2989 2990 @Override 2991 protected void onApplyThemeResource(Resources.Theme theme, int resid, 2992 boolean first) { 2993 if (mParent == null) { 2994 super.onApplyThemeResource(theme, resid, first); 2995 } else { 2996 try { 2997 theme.setTo(mParent.getTheme()); 2998 } catch (Exception e) { 2999 // Empty 3000 } 3001 theme.applyStyle(resid, false); 3002 } 3003 } 3004 3005 /** 3006 * Launch an activity for which you would like a result when it finished. 3007 * When this activity exits, your 3008 * onActivityResult() method will be called with the given requestCode. 3009 * Using a negative requestCode is the same as calling 3010 * {@link #startActivity} (the activity is not launched as a sub-activity). 3011 * 3012 * <p>Note that this method should only be used with Intent protocols 3013 * that are defined to return a result. In other protocols (such as 3014 * {@link Intent#ACTION_MAIN} or {@link Intent#ACTION_VIEW}), you may 3015 * not get the result when you expect. For example, if the activity you 3016 * are launching uses the singleTask launch mode, it will not run in your 3017 * task and thus you will immediately receive a cancel result. 3018 * 3019 * <p>As a special case, if you call startActivityForResult() with a requestCode 3020 * >= 0 during the initial onCreate(Bundle savedInstanceState)/onResume() of your 3021 * activity, then your window will not be displayed until a result is 3022 * returned back from the started activity. This is to avoid visible 3023 * flickering when redirecting to another activity. 3024 * 3025 * <p>This method throws {@link android.content.ActivityNotFoundException} 3026 * if there was no Activity found to run the given Intent. 3027 * 3028 * @param intent The intent to start. 3029 * @param requestCode If >= 0, this code will be returned in 3030 * onActivityResult() when the activity exits. 3031 * 3032 * @throws android.content.ActivityNotFoundException 3033 * 3034 * @see #startActivity 3035 */ 3036 public void startActivityForResult(Intent intent, int requestCode) { 3037 if (mParent == null) { 3038 Instrumentation.ActivityResult ar = 3039 mInstrumentation.execStartActivity( 3040 this, mMainThread.getApplicationThread(), mToken, this, 3041 intent, requestCode); 3042 if (ar != null) { 3043 mMainThread.sendActivityResult( 3044 mToken, mEmbeddedID, requestCode, ar.getResultCode(), 3045 ar.getResultData()); 3046 } 3047 if (requestCode >= 0) { 3048 // If this start is requesting a result, we can avoid making 3049 // the activity visible until the result is received. Setting 3050 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3051 // activity hidden during this time, to avoid flickering. 3052 // This can only be done when a result is requested because 3053 // that guarantees we will get information back when the 3054 // activity is finished, no matter what happens to it. 3055 mStartedActivity = true; 3056 } 3057 } else { 3058 mParent.startActivityFromChild(this, intent, requestCode); 3059 } 3060 } 3061 3062 /** 3063 * Like {@link #startActivityForResult(Intent, int)}, but allowing you 3064 * to use a IntentSender to describe the activity to be started. If 3065 * the IntentSender is for an activity, that activity will be started 3066 * as if you had called the regular {@link #startActivityForResult(Intent, int)} 3067 * here; otherwise, its associated action will be executed (such as 3068 * sending a broadcast) as if you had called 3069 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 3070 * 3071 * @param intent The IntentSender to launch. 3072 * @param requestCode If >= 0, this code will be returned in 3073 * onActivityResult() when the activity exits. 3074 * @param fillInIntent If non-null, this will be provided as the 3075 * intent parameter to {@link IntentSender#sendIntent}. 3076 * @param flagsMask Intent flags in the original IntentSender that you 3077 * would like to change. 3078 * @param flagsValues Desired values for any bits set in 3079 * <var>flagsMask</var> 3080 * @param extraFlags Always set to 0. 3081 */ 3082 public void startIntentSenderForResult(IntentSender intent, int requestCode, 3083 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3084 throws IntentSender.SendIntentException { 3085 if (mParent == null) { 3086 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3087 flagsMask, flagsValues, this); 3088 } else { 3089 mParent.startIntentSenderFromChild(this, intent, requestCode, 3090 fillInIntent, flagsMask, flagsValues, extraFlags); 3091 } 3092 } 3093 3094 private void startIntentSenderForResultInner(IntentSender intent, int requestCode, 3095 Intent fillInIntent, int flagsMask, int flagsValues, Activity activity) 3096 throws IntentSender.SendIntentException { 3097 try { 3098 String resolvedType = null; 3099 if (fillInIntent != null) { 3100 resolvedType = fillInIntent.resolveTypeIfNeeded(getContentResolver()); 3101 } 3102 int result = ActivityManagerNative.getDefault() 3103 .startActivityIntentSender(mMainThread.getApplicationThread(), intent, 3104 fillInIntent, resolvedType, mToken, activity.mEmbeddedID, 3105 requestCode, flagsMask, flagsValues); 3106 if (result == IActivityManager.START_CANCELED) { 3107 throw new IntentSender.SendIntentException(); 3108 } 3109 Instrumentation.checkStartActivityResult(result, null); 3110 } catch (RemoteException e) { 3111 } 3112 if (requestCode >= 0) { 3113 // If this start is requesting a result, we can avoid making 3114 // the activity visible until the result is received. Setting 3115 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3116 // activity hidden during this time, to avoid flickering. 3117 // This can only be done when a result is requested because 3118 // that guarantees we will get information back when the 3119 // activity is finished, no matter what happens to it. 3120 mStartedActivity = true; 3121 } 3122 } 3123 3124 /** 3125 * Launch a new activity. You will not receive any information about when 3126 * the activity exits. This implementation overrides the base version, 3127 * providing information about 3128 * the activity performing the launch. Because of this additional 3129 * information, the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag is not 3130 * required; if not specified, the new activity will be added to the 3131 * task of the caller. 3132 * 3133 * <p>This method throws {@link android.content.ActivityNotFoundException} 3134 * if there was no Activity found to run the given Intent. 3135 * 3136 * @param intent The intent to start. 3137 * 3138 * @throws android.content.ActivityNotFoundException 3139 * 3140 * @see #startActivityForResult 3141 */ 3142 @Override 3143 public void startActivity(Intent intent) { 3144 startActivityForResult(intent, -1); 3145 } 3146 3147 /** 3148 * Like {@link #startActivity(Intent)}, but taking a IntentSender 3149 * to start; see 3150 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3151 * for more information. 3152 * 3153 * @param intent The IntentSender to launch. 3154 * @param fillInIntent If non-null, this will be provided as the 3155 * intent parameter to {@link IntentSender#sendIntent}. 3156 * @param flagsMask Intent flags in the original IntentSender that you 3157 * would like to change. 3158 * @param flagsValues Desired values for any bits set in 3159 * <var>flagsMask</var> 3160 * @param extraFlags Always set to 0. 3161 */ 3162 public void startIntentSender(IntentSender intent, 3163 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 3164 throws IntentSender.SendIntentException { 3165 startIntentSenderForResult(intent, -1, fillInIntent, flagsMask, 3166 flagsValues, extraFlags); 3167 } 3168 3169 /** 3170 * A special variation to launch an activity only if a new activity 3171 * instance is needed to handle the given Intent. In other words, this is 3172 * just like {@link #startActivityForResult(Intent, int)} except: if you are 3173 * using the {@link Intent#FLAG_ACTIVITY_SINGLE_TOP} flag, or 3174 * singleTask or singleTop 3175 * {@link android.R.styleable#AndroidManifestActivity_launchMode launchMode}, 3176 * and the activity 3177 * that handles <var>intent</var> is the same as your currently running 3178 * activity, then a new instance is not needed. In this case, instead of 3179 * the normal behavior of calling {@link #onNewIntent} this function will 3180 * return and you can handle the Intent yourself. 3181 * 3182 * <p>This function can only be called from a top-level activity; if it is 3183 * called from a child activity, a runtime exception will be thrown. 3184 * 3185 * @param intent The intent to start. 3186 * @param requestCode If >= 0, this code will be returned in 3187 * onActivityResult() when the activity exits, as described in 3188 * {@link #startActivityForResult}. 3189 * 3190 * @return If a new activity was launched then true is returned; otherwise 3191 * false is returned and you must handle the Intent yourself. 3192 * 3193 * @see #startActivity 3194 * @see #startActivityForResult 3195 */ 3196 public boolean startActivityIfNeeded(Intent intent, int requestCode) { 3197 if (mParent == null) { 3198 int result = IActivityManager.START_RETURN_INTENT_TO_CALLER; 3199 try { 3200 result = ActivityManagerNative.getDefault() 3201 .startActivity(mMainThread.getApplicationThread(), 3202 intent, intent.resolveTypeIfNeeded( 3203 getContentResolver()), 3204 null, 0, 3205 mToken, mEmbeddedID, requestCode, true, false); 3206 } catch (RemoteException e) { 3207 // Empty 3208 } 3209 3210 Instrumentation.checkStartActivityResult(result, intent); 3211 3212 if (requestCode >= 0) { 3213 // If this start is requesting a result, we can avoid making 3214 // the activity visible until the result is received. Setting 3215 // this code during onCreate(Bundle savedInstanceState) or onResume() will keep the 3216 // activity hidden during this time, to avoid flickering. 3217 // This can only be done when a result is requested because 3218 // that guarantees we will get information back when the 3219 // activity is finished, no matter what happens to it. 3220 mStartedActivity = true; 3221 } 3222 return result != IActivityManager.START_RETURN_INTENT_TO_CALLER; 3223 } 3224 3225 throw new UnsupportedOperationException( 3226 "startActivityIfNeeded can only be called from a top-level activity"); 3227 } 3228 3229 /** 3230 * Special version of starting an activity, for use when you are replacing 3231 * other activity components. You can use this to hand the Intent off 3232 * to the next Activity that can handle it. You typically call this in 3233 * {@link #onCreate} with the Intent returned by {@link #getIntent}. 3234 * 3235 * @param intent The intent to dispatch to the next activity. For 3236 * correct behavior, this must be the same as the Intent that started 3237 * your own activity; the only changes you can make are to the extras 3238 * inside of it. 3239 * 3240 * @return Returns a boolean indicating whether there was another Activity 3241 * to start: true if there was a next activity to start, false if there 3242 * wasn't. In general, if true is returned you will then want to call 3243 * finish() on yourself. 3244 */ 3245 public boolean startNextMatchingActivity(Intent intent) { 3246 if (mParent == null) { 3247 try { 3248 return ActivityManagerNative.getDefault() 3249 .startNextMatchingActivity(mToken, intent); 3250 } catch (RemoteException e) { 3251 // Empty 3252 } 3253 return false; 3254 } 3255 3256 throw new UnsupportedOperationException( 3257 "startNextMatchingActivity can only be called from a top-level activity"); 3258 } 3259 3260 /** 3261 * This is called when a child activity of this one calls its 3262 * {@link #startActivity} or {@link #startActivityForResult} method. 3263 * 3264 * <p>This method throws {@link android.content.ActivityNotFoundException} 3265 * if there was no Activity found to run the given Intent. 3266 * 3267 * @param child The activity making the call. 3268 * @param intent The intent to start. 3269 * @param requestCode Reply request code. < 0 if reply is not requested. 3270 * 3271 * @throws android.content.ActivityNotFoundException 3272 * 3273 * @see #startActivity 3274 * @see #startActivityForResult 3275 */ 3276 public void startActivityFromChild(Activity child, Intent intent, 3277 int requestCode) { 3278 Instrumentation.ActivityResult ar = 3279 mInstrumentation.execStartActivity( 3280 this, mMainThread.getApplicationThread(), mToken, child, 3281 intent, requestCode); 3282 if (ar != null) { 3283 mMainThread.sendActivityResult( 3284 mToken, child.mEmbeddedID, requestCode, 3285 ar.getResultCode(), ar.getResultData()); 3286 } 3287 } 3288 3289 /** 3290 * Like {@link #startActivityFromChild(Activity, Intent, int)}, but 3291 * taking a IntentSender; see 3292 * {@link #startIntentSenderForResult(IntentSender, int, Intent, int, int, int)} 3293 * for more information. 3294 */ 3295 public void startIntentSenderFromChild(Activity child, IntentSender intent, 3296 int requestCode, Intent fillInIntent, int flagsMask, int flagsValues, 3297 int extraFlags) 3298 throws IntentSender.SendIntentException { 3299 startIntentSenderForResultInner(intent, requestCode, fillInIntent, 3300 flagsMask, flagsValues, child); 3301 } 3302 3303 /** 3304 * Call immediately after one of the flavors of {@link #startActivity(Intent)} 3305 * or {@link #finish} to specify an explicit transition animation to 3306 * perform next. 3307 * @param enterAnim A resource ID of the animation resource to use for 3308 * the incoming activity. Use 0 for no animation. 3309 * @param exitAnim A resource ID of the animation resource to use for 3310 * the outgoing activity. Use 0 for no animation. 3311 */ 3312 public void overridePendingTransition(int enterAnim, int exitAnim) { 3313 try { 3314 ActivityManagerNative.getDefault().overridePendingTransition( 3315 mToken, getPackageName(), enterAnim, exitAnim); 3316 } catch (RemoteException e) { 3317 } 3318 } 3319 3320 /** 3321 * Call this to set the result that your activity will return to its 3322 * caller. 3323 * 3324 * @param resultCode The result code to propagate back to the originating 3325 * activity, often RESULT_CANCELED or RESULT_OK 3326 * 3327 * @see #RESULT_CANCELED 3328 * @see #RESULT_OK 3329 * @see #RESULT_FIRST_USER 3330 * @see #setResult(int, Intent) 3331 */ 3332 public final void setResult(int resultCode) { 3333 synchronized (this) { 3334 mResultCode = resultCode; 3335 mResultData = null; 3336 } 3337 } 3338 3339 /** 3340 * Call this to set the result that your activity will return to its 3341 * caller. 3342 * 3343 * @param resultCode The result code to propagate back to the originating 3344 * activity, often RESULT_CANCELED or RESULT_OK 3345 * @param data The data to propagate back to the originating activity. 3346 * 3347 * @see #RESULT_CANCELED 3348 * @see #RESULT_OK 3349 * @see #RESULT_FIRST_USER 3350 * @see #setResult(int) 3351 */ 3352 public final void setResult(int resultCode, Intent data) { 3353 synchronized (this) { 3354 mResultCode = resultCode; 3355 mResultData = data; 3356 } 3357 } 3358 3359 /** 3360 * Return the name of the package that invoked this activity. This is who 3361 * the data in {@link #setResult setResult()} will be sent to. You can 3362 * use this information to validate that the recipient is allowed to 3363 * receive the data. 3364 * 3365 * <p>Note: if the calling activity is not expecting a result (that is it 3366 * did not use the {@link #startActivityForResult} 3367 * form that includes a request code), then the calling package will be 3368 * null. 3369 * 3370 * @return The package of the activity that will receive your 3371 * reply, or null if none. 3372 */ 3373 public String getCallingPackage() { 3374 try { 3375 return ActivityManagerNative.getDefault().getCallingPackage(mToken); 3376 } catch (RemoteException e) { 3377 return null; 3378 } 3379 } 3380 3381 /** 3382 * Return the name of the activity that invoked this activity. This is 3383 * who the data in {@link #setResult setResult()} will be sent to. You 3384 * can use this information to validate that the recipient is allowed to 3385 * receive the data. 3386 * 3387 * <p>Note: if the calling activity is not expecting a result (that is it 3388 * did not use the {@link #startActivityForResult} 3389 * form that includes a request code), then the calling package will be 3390 * null. 3391 * 3392 * @return String The full name of the activity that will receive your 3393 * reply, or null if none. 3394 */ 3395 public ComponentName getCallingActivity() { 3396 try { 3397 return ActivityManagerNative.getDefault().getCallingActivity(mToken); 3398 } catch (RemoteException e) { 3399 return null; 3400 } 3401 } 3402 3403 /** 3404 * Control whether this activity's main window is visible. This is intended 3405 * only for the special case of an activity that is not going to show a 3406 * UI itself, but can't just finish prior to onResume() because it needs 3407 * to wait for a service binding or such. Setting this to false allows 3408 * you to prevent your UI from being shown during that time. 3409 * 3410 * <p>The default value for this is taken from the 3411 * {@link android.R.attr#windowNoDisplay} attribute of the activity's theme. 3412 */ 3413 public void setVisible(boolean visible) { 3414 if (mVisibleFromClient != visible) { 3415 mVisibleFromClient = visible; 3416 if (mVisibleFromServer) { 3417 if (visible) makeVisible(); 3418 else mDecor.setVisibility(View.INVISIBLE); 3419 } 3420 } 3421 } 3422 3423 void makeVisible() { 3424 if (!mWindowAdded) { 3425 ViewManager wm = getWindowManager(); 3426 wm.addView(mDecor, getWindow().getAttributes()); 3427 mWindowAdded = true; 3428 } 3429 mDecor.setVisibility(View.VISIBLE); 3430 } 3431 3432 /** 3433 * Check to see whether this activity is in the process of finishing, 3434 * either because you called {@link #finish} on it or someone else 3435 * has requested that it finished. This is often used in 3436 * {@link #onPause} to determine whether the activity is simply pausing or 3437 * completely finishing. 3438 * 3439 * @return If the activity is finishing, returns true; else returns false. 3440 * 3441 * @see #finish 3442 */ 3443 public boolean isFinishing() { 3444 return mFinished; 3445 } 3446 3447 /** 3448 * Check to see whether this activity is in the process of being destroyed in order to be 3449 * recreated with a new configuration. This is often used in 3450 * {@link #onStop} to determine whether the state needs to be cleaned up or will be passed 3451 * on to the next instance of the activity via {@link #onRetainNonConfigurationInstance()}. 3452 * 3453 * @return If the activity is being torn down in order to be recreated with a new configuration, 3454 * returns true; else returns false. 3455 */ 3456 public boolean isChangingConfigurations() { 3457 return mChangingConfigurations; 3458 } 3459 3460 /** 3461 * Call this when your activity is done and should be closed. The 3462 * ActivityResult is propagated back to whoever launched you via 3463 * onActivityResult(). 3464 */ 3465 public void finish() { 3466 if (mParent == null) { 3467 int resultCode; 3468 Intent resultData; 3469 synchronized (this) { 3470 resultCode = mResultCode; 3471 resultData = mResultData; 3472 } 3473 if (Config.LOGV) Log.v(TAG, "Finishing self: token=" + mToken); 3474 try { 3475 if (ActivityManagerNative.getDefault() 3476 .finishActivity(mToken, resultCode, resultData)) { 3477 mFinished = true; 3478 } 3479 } catch (RemoteException e) { 3480 // Empty 3481 } 3482 } else { 3483 mParent.finishFromChild(this); 3484 } 3485 } 3486 3487 /** 3488 * This is called when a child activity of this one calls its 3489 * {@link #finish} method. The default implementation simply calls 3490 * finish() on this activity (the parent), finishing the entire group. 3491 * 3492 * @param child The activity making the call. 3493 * 3494 * @see #finish 3495 */ 3496 public void finishFromChild(Activity child) { 3497 finish(); 3498 } 3499 3500 /** 3501 * Force finish another activity that you had previously started with 3502 * {@link #startActivityForResult}. 3503 * 3504 * @param requestCode The request code of the activity that you had 3505 * given to startActivityForResult(). If there are multiple 3506 * activities started with this request code, they 3507 * will all be finished. 3508 */ 3509 public void finishActivity(int requestCode) { 3510 if (mParent == null) { 3511 try { 3512 ActivityManagerNative.getDefault() 3513 .finishSubActivity(mToken, mEmbeddedID, requestCode); 3514 } catch (RemoteException e) { 3515 // Empty 3516 } 3517 } else { 3518 mParent.finishActivityFromChild(this, requestCode); 3519 } 3520 } 3521 3522 /** 3523 * This is called when a child activity of this one calls its 3524 * finishActivity(). 3525 * 3526 * @param child The activity making the call. 3527 * @param requestCode Request code that had been used to start the 3528 * activity. 3529 */ 3530 public void finishActivityFromChild(Activity child, int requestCode) { 3531 try { 3532 ActivityManagerNative.getDefault() 3533 .finishSubActivity(mToken, child.mEmbeddedID, requestCode); 3534 } catch (RemoteException e) { 3535 // Empty 3536 } 3537 } 3538 3539 /** 3540 * Called when an activity you launched exits, giving you the requestCode 3541 * you started it with, the resultCode it returned, and any additional 3542 * data from it. The <var>resultCode</var> will be 3543 * {@link #RESULT_CANCELED} if the activity explicitly returned that, 3544 * didn't return any result, or crashed during its operation. 3545 * 3546 * <p>You will receive this call immediately before onResume() when your 3547 * activity is re-starting. 3548 * 3549 * @param requestCode The integer request code originally supplied to 3550 * startActivityForResult(), allowing you to identify who this 3551 * result came from. 3552 * @param resultCode The integer result code returned by the child activity 3553 * through its setResult(). 3554 * @param data An Intent, which can return result data to the caller 3555 * (various data can be attached to Intent "extras"). 3556 * 3557 * @see #startActivityForResult 3558 * @see #createPendingResult 3559 * @see #setResult(int) 3560 */ 3561 protected void onActivityResult(int requestCode, int resultCode, 3562 Intent data) { 3563 } 3564 3565 /** 3566 * Create a new PendingIntent object which you can hand to others 3567 * for them to use to send result data back to your 3568 * {@link #onActivityResult} callback. The created object will be either 3569 * one-shot (becoming invalid after a result is sent back) or multiple 3570 * (allowing any number of results to be sent through it). 3571 * 3572 * @param requestCode Private request code for the sender that will be 3573 * associated with the result data when it is returned. The sender can not 3574 * modify this value, allowing you to identify incoming results. 3575 * @param data Default data to supply in the result, which may be modified 3576 * by the sender. 3577 * @param flags May be {@link PendingIntent#FLAG_ONE_SHOT PendingIntent.FLAG_ONE_SHOT}, 3578 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE}, 3579 * {@link PendingIntent#FLAG_CANCEL_CURRENT PendingIntent.FLAG_CANCEL_CURRENT}, 3580 * {@link PendingIntent#FLAG_UPDATE_CURRENT PendingIntent.FLAG_UPDATE_CURRENT}, 3581 * or any of the flags as supported by 3582 * {@link Intent#fillIn Intent.fillIn()} to control which unspecified parts 3583 * of the intent that can be supplied when the actual send happens. 3584 * 3585 * @return Returns an existing or new PendingIntent matching the given 3586 * parameters. May return null only if 3587 * {@link PendingIntent#FLAG_NO_CREATE PendingIntent.FLAG_NO_CREATE} has been 3588 * supplied. 3589 * 3590 * @see PendingIntent 3591 */ 3592 public PendingIntent createPendingResult(int requestCode, Intent data, 3593 int flags) { 3594 String packageName = getPackageName(); 3595 try { 3596 IIntentSender target = 3597 ActivityManagerNative.getDefault().getIntentSender( 3598 IActivityManager.INTENT_SENDER_ACTIVITY_RESULT, packageName, 3599 mParent == null ? mToken : mParent.mToken, 3600 mEmbeddedID, requestCode, data, null, flags); 3601 return target != null ? new PendingIntent(target) : null; 3602 } catch (RemoteException e) { 3603 // Empty 3604 } 3605 return null; 3606 } 3607 3608 /** 3609 * Change the desired orientation of this activity. If the activity 3610 * is currently in the foreground or otherwise impacting the screen 3611 * orientation, the screen will immediately be changed (possibly causing 3612 * the activity to be restarted). Otherwise, this will be used the next 3613 * time the activity is visible. 3614 * 3615 * @param requestedOrientation An orientation constant as used in 3616 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3617 */ 3618 public void setRequestedOrientation(int requestedOrientation) { 3619 if (mParent == null) { 3620 try { 3621 ActivityManagerNative.getDefault().setRequestedOrientation( 3622 mToken, requestedOrientation); 3623 } catch (RemoteException e) { 3624 // Empty 3625 } 3626 } else { 3627 mParent.setRequestedOrientation(requestedOrientation); 3628 } 3629 } 3630 3631 /** 3632 * Return the current requested orientation of the activity. This will 3633 * either be the orientation requested in its component's manifest, or 3634 * the last requested orientation given to 3635 * {@link #setRequestedOrientation(int)}. 3636 * 3637 * @return Returns an orientation constant as used in 3638 * {@link ActivityInfo#screenOrientation ActivityInfo.screenOrientation}. 3639 */ 3640 public int getRequestedOrientation() { 3641 if (mParent == null) { 3642 try { 3643 return ActivityManagerNative.getDefault() 3644 .getRequestedOrientation(mToken); 3645 } catch (RemoteException e) { 3646 // Empty 3647 } 3648 } else { 3649 return mParent.getRequestedOrientation(); 3650 } 3651 return ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED; 3652 } 3653 3654 /** 3655 * Return the identifier of the task this activity is in. This identifier 3656 * will remain the same for the lifetime of the activity. 3657 * 3658 * @return Task identifier, an opaque integer. 3659 */ 3660 public int getTaskId() { 3661 try { 3662 return ActivityManagerNative.getDefault() 3663 .getTaskForActivity(mToken, false); 3664 } catch (RemoteException e) { 3665 return -1; 3666 } 3667 } 3668 3669 /** 3670 * Return whether this activity is the root of a task. The root is the 3671 * first activity in a task. 3672 * 3673 * @return True if this is the root activity, else false. 3674 */ 3675 public boolean isTaskRoot() { 3676 try { 3677 return ActivityManagerNative.getDefault() 3678 .getTaskForActivity(mToken, true) >= 0; 3679 } catch (RemoteException e) { 3680 return false; 3681 } 3682 } 3683 3684 /** 3685 * Move the task containing this activity to the back of the activity 3686 * stack. The activity's order within the task is unchanged. 3687 * 3688 * @param nonRoot If false then this only works if the activity is the root 3689 * of a task; if true it will work for any activity in 3690 * a task. 3691 * 3692 * @return If the task was moved (or it was already at the 3693 * back) true is returned, else false. 3694 */ 3695 public boolean moveTaskToBack(boolean nonRoot) { 3696 try { 3697 return ActivityManagerNative.getDefault().moveActivityTaskToBack( 3698 mToken, nonRoot); 3699 } catch (RemoteException e) { 3700 // Empty 3701 } 3702 return false; 3703 } 3704 3705 /** 3706 * Returns class name for this activity with the package prefix removed. 3707 * This is the default name used to read and write settings. 3708 * 3709 * @return The local class name. 3710 */ 3711 public String getLocalClassName() { 3712 final String pkg = getPackageName(); 3713 final String cls = mComponent.getClassName(); 3714 int packageLen = pkg.length(); 3715 if (!cls.startsWith(pkg) || cls.length() <= packageLen 3716 || cls.charAt(packageLen) != '.') { 3717 return cls; 3718 } 3719 return cls.substring(packageLen+1); 3720 } 3721 3722 /** 3723 * Returns complete component name of this activity. 3724 * 3725 * @return Returns the complete component name for this activity 3726 */ 3727 public ComponentName getComponentName() 3728 { 3729 return mComponent; 3730 } 3731 3732 /** 3733 * Retrieve a {@link SharedPreferences} object for accessing preferences 3734 * that are private to this activity. This simply calls the underlying 3735 * {@link #getSharedPreferences(String, int)} method by passing in this activity's 3736 * class name as the preferences name. 3737 * 3738 * @param mode Operating mode. Use {@link #MODE_PRIVATE} for the default 3739 * operation, {@link #MODE_WORLD_READABLE} and 3740 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 3741 * 3742 * @return Returns the single SharedPreferences instance that can be used 3743 * to retrieve and modify the preference values. 3744 */ 3745 public SharedPreferences getPreferences(int mode) { 3746 return getSharedPreferences(getLocalClassName(), mode); 3747 } 3748 3749 private void ensureSearchManager() { 3750 if (mSearchManager != null) { 3751 return; 3752 } 3753 3754 mSearchManager = new SearchManager(this, null); 3755 } 3756 3757 @Override 3758 public Object getSystemService(String name) { 3759 if (getBaseContext() == null) { 3760 throw new IllegalStateException( 3761 "System services not available to Activities before onCreate()"); 3762 } 3763 3764 if (WINDOW_SERVICE.equals(name)) { 3765 return mWindowManager; 3766 } else if (SEARCH_SERVICE.equals(name)) { 3767 ensureSearchManager(); 3768 return mSearchManager; 3769 } 3770 return super.getSystemService(name); 3771 } 3772 3773 /** 3774 * Change the title associated with this activity. If this is a 3775 * top-level activity, the title for its window will change. If it 3776 * is an embedded activity, the parent can do whatever it wants 3777 * with it. 3778 */ 3779 public void setTitle(CharSequence title) { 3780 mTitle = title; 3781 onTitleChanged(title, mTitleColor); 3782 3783 if (mParent != null) { 3784 mParent.onChildTitleChanged(this, title); 3785 } 3786 } 3787 3788 /** 3789 * Change the title associated with this activity. If this is a 3790 * top-level activity, the title for its window will change. If it 3791 * is an embedded activity, the parent can do whatever it wants 3792 * with it. 3793 */ 3794 public void setTitle(int titleId) { 3795 setTitle(getText(titleId)); 3796 } 3797 3798 public void setTitleColor(int textColor) { 3799 mTitleColor = textColor; 3800 onTitleChanged(mTitle, textColor); 3801 } 3802 3803 public final CharSequence getTitle() { 3804 return mTitle; 3805 } 3806 3807 public final int getTitleColor() { 3808 return mTitleColor; 3809 } 3810 3811 protected void onTitleChanged(CharSequence title, int color) { 3812 if (mTitleReady) { 3813 final Window win = getWindow(); 3814 if (win != null) { 3815 win.setTitle(title); 3816 if (color != 0) { 3817 win.setTitleColor(color); 3818 } 3819 } 3820 } 3821 } 3822 3823 protected void onChildTitleChanged(Activity childActivity, CharSequence title) { 3824 } 3825 3826 /** 3827 * Sets the visibility of the progress bar in the title. 3828 * <p> 3829 * In order for the progress bar to be shown, the feature must be requested 3830 * via {@link #requestWindowFeature(int)}. 3831 * 3832 * @param visible Whether to show the progress bars in the title. 3833 */ 3834 public final void setProgressBarVisibility(boolean visible) { 3835 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, visible ? Window.PROGRESS_VISIBILITY_ON : 3836 Window.PROGRESS_VISIBILITY_OFF); 3837 } 3838 3839 /** 3840 * Sets the visibility of the indeterminate progress bar in the title. 3841 * <p> 3842 * In order for the progress bar to be shown, the feature must be requested 3843 * via {@link #requestWindowFeature(int)}. 3844 * 3845 * @param visible Whether to show the progress bars in the title. 3846 */ 3847 public final void setProgressBarIndeterminateVisibility(boolean visible) { 3848 getWindow().setFeatureInt(Window.FEATURE_INDETERMINATE_PROGRESS, 3849 visible ? Window.PROGRESS_VISIBILITY_ON : Window.PROGRESS_VISIBILITY_OFF); 3850 } 3851 3852 /** 3853 * Sets whether the horizontal progress bar in the title should be indeterminate (the circular 3854 * is always indeterminate). 3855 * <p> 3856 * In order for the progress bar to be shown, the feature must be requested 3857 * via {@link #requestWindowFeature(int)}. 3858 * 3859 * @param indeterminate Whether the horizontal progress bar should be indeterminate. 3860 */ 3861 public final void setProgressBarIndeterminate(boolean indeterminate) { 3862 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3863 indeterminate ? Window.PROGRESS_INDETERMINATE_ON : Window.PROGRESS_INDETERMINATE_OFF); 3864 } 3865 3866 /** 3867 * Sets the progress for the progress bars in the title. 3868 * <p> 3869 * In order for the progress bar to be shown, the feature must be requested 3870 * via {@link #requestWindowFeature(int)}. 3871 * 3872 * @param progress The progress for the progress bar. Valid ranges are from 3873 * 0 to 10000 (both inclusive). If 10000 is given, the progress 3874 * bar will be completely filled and will fade out. 3875 */ 3876 public final void setProgress(int progress) { 3877 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, progress + Window.PROGRESS_START); 3878 } 3879 3880 /** 3881 * Sets the secondary progress for the progress bar in the title. This 3882 * progress is drawn between the primary progress (set via 3883 * {@link #setProgress(int)} and the background. It can be ideal for media 3884 * scenarios such as showing the buffering progress while the default 3885 * progress shows the play progress. 3886 * <p> 3887 * In order for the progress bar to be shown, the feature must be requested 3888 * via {@link #requestWindowFeature(int)}. 3889 * 3890 * @param secondaryProgress The secondary progress for the progress bar. Valid ranges are from 3891 * 0 to 10000 (both inclusive). 3892 */ 3893 public final void setSecondaryProgress(int secondaryProgress) { 3894 getWindow().setFeatureInt(Window.FEATURE_PROGRESS, 3895 secondaryProgress + Window.PROGRESS_SECONDARY_START); 3896 } 3897 3898 /** 3899 * Suggests an audio stream whose volume should be changed by the hardware 3900 * volume controls. 3901 * <p> 3902 * The suggested audio stream will be tied to the window of this Activity. 3903 * If the Activity is switched, the stream set here is no longer the 3904 * suggested stream. The client does not need to save and restore the old 3905 * suggested stream value in onPause and onResume. 3906 * 3907 * @param streamType The type of the audio stream whose volume should be 3908 * changed by the hardware volume controls. It is not guaranteed that 3909 * the hardware volume controls will always change this stream's 3910 * volume (for example, if a call is in progress, its stream's volume 3911 * may be changed instead). To reset back to the default, use 3912 * {@link AudioManager#USE_DEFAULT_STREAM_TYPE}. 3913 */ 3914 public final void setVolumeControlStream(int streamType) { 3915 getWindow().setVolumeControlStream(streamType); 3916 } 3917 3918 /** 3919 * Gets the suggested audio stream whose volume should be changed by the 3920 * harwdare volume controls. 3921 * 3922 * @return The suggested audio stream type whose volume should be changed by 3923 * the hardware volume controls. 3924 * @see #setVolumeControlStream(int) 3925 */ 3926 public final int getVolumeControlStream() { 3927 return getWindow().getVolumeControlStream(); 3928 } 3929 3930 /** 3931 * Runs the specified action on the UI thread. If the current thread is the UI 3932 * thread, then the action is executed immediately. If the current thread is 3933 * not the UI thread, the action is posted to the event queue of the UI thread. 3934 * 3935 * @param action the action to run on the UI thread 3936 */ 3937 public final void runOnUiThread(Runnable action) { 3938 if (Thread.currentThread() != mUiThread) { 3939 mHandler.post(action); 3940 } else { 3941 action.run(); 3942 } 3943 } 3944 3945 /** 3946 * Standard implementation of 3947 * {@link android.view.LayoutInflater.Factory#onCreateView} used when 3948 * inflating with the LayoutInflater returned by {@link #getSystemService}. 3949 * This implementation handles <fragment> tags to embed fragments inside 3950 * of the activity. 3951 * 3952 * @see android.view.LayoutInflater#createView 3953 * @see android.view.Window#getLayoutInflater 3954 */ 3955 public View onCreateView(String name, Context context, AttributeSet attrs) { 3956 if (!"fragment".equals(name)) { 3957 return null; 3958 } 3959 3960 TypedArray a = 3961 context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.Fragment); 3962 String fname = a.getString(com.android.internal.R.styleable.Fragment_name); 3963 int id = a.getInt(com.android.internal.R.styleable.Fragment_id, 0); 3964 String tag = a.getString(com.android.internal.R.styleable.Fragment_tag); 3965 a.recycle(); 3966 3967 Constructor constructor = sConstructorMap.get(fname); 3968 Class clazz = null; 3969 3970 try { 3971 if (constructor == null) { 3972 // Class not found in the cache, see if it's real, and try to add it 3973 clazz = getClassLoader().loadClass(fname); 3974 constructor = clazz.getConstructor(sConstructorSignature); 3975 sConstructorMap.put(fname, constructor); 3976 } 3977 Fragment fragment = (Fragment)constructor.newInstance(sConstructorArgs); 3978 fragment.onInflate(this, attrs); 3979 mFragments.addFragment(fragment, true); 3980 if (fragment.mView == null) { 3981 throw new IllegalStateException("Fragment " + fname 3982 + " did not create a view."); 3983 } 3984 return fragment.mView; 3985 3986 } catch (NoSuchMethodException e) { 3987 InflateException ie = new InflateException(attrs.getPositionDescription() 3988 + ": Error inflating class " + fname); 3989 ie.initCause(e); 3990 throw ie; 3991 3992 } catch (ClassNotFoundException e) { 3993 // If loadClass fails, we should propagate the exception. 3994 throw new RuntimeException(e); 3995 } catch (Exception e) { 3996 InflateException ie = new InflateException(attrs.getPositionDescription() 3997 + ": Error inflating class " 3998 + (clazz == null ? "<unknown>" : clazz.getName())); 3999 ie.initCause(e); 4000 throw new RuntimeException(ie); 4001 } 4002 } 4003 4004 // ------------------ Internal API ------------------ 4005 4006 final void setParent(Activity parent) { 4007 mParent = parent; 4008 } 4009 4010 final void attach(Context context, ActivityThread aThread, Instrumentation instr, IBinder token, 4011 Application application, Intent intent, ActivityInfo info, CharSequence title, 4012 Activity parent, String id, Object lastNonConfigurationInstance, 4013 Configuration config) { 4014 attach(context, aThread, instr, token, 0, application, intent, info, title, parent, id, 4015 lastNonConfigurationInstance, null, config); 4016 } 4017 4018 final void attach(Context context, ActivityThread aThread, 4019 Instrumentation instr, IBinder token, int ident, 4020 Application application, Intent intent, ActivityInfo info, 4021 CharSequence title, Activity parent, String id, 4022 Object lastNonConfigurationInstance, 4023 HashMap<String,Object> lastNonConfigurationChildInstances, 4024 Configuration config) { 4025 attachBaseContext(context); 4026 4027 mFragments.attachActivity(this); 4028 4029 mWindow = PolicyManager.makeNewWindow(this); 4030 mWindow.setCallback(this); 4031 mWindow.getLayoutInflater().setFactory(this); 4032 if (info.softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED) { 4033 mWindow.setSoftInputMode(info.softInputMode); 4034 } 4035 mUiThread = Thread.currentThread(); 4036 4037 mMainThread = aThread; 4038 mInstrumentation = instr; 4039 mToken = token; 4040 mIdent = ident; 4041 mApplication = application; 4042 mIntent = intent; 4043 mComponent = intent.getComponent(); 4044 mActivityInfo = info; 4045 mTitle = title; 4046 mParent = parent; 4047 mEmbeddedID = id; 4048 mLastNonConfigurationInstance = lastNonConfigurationInstance; 4049 mLastNonConfigurationChildInstances = lastNonConfigurationChildInstances; 4050 4051 mWindow.setWindowManager(null, mToken, mComponent.flattenToString()); 4052 if (mParent != null) { 4053 mWindow.setContainer(mParent.getWindow()); 4054 } 4055 mWindowManager = mWindow.getWindowManager(); 4056 mCurrentConfig = config; 4057 } 4058 4059 final IBinder getActivityToken() { 4060 return mParent != null ? mParent.getActivityToken() : mToken; 4061 } 4062 4063 final void performCreate(Bundle icicle) { 4064 onCreate(icicle); 4065 } 4066 4067 final void performStart() { 4068 mCalled = false; 4069 mInstrumentation.callActivityOnStart(this); 4070 if (!mCalled) { 4071 throw new SuperNotCalledException( 4072 "Activity " + mComponent.toShortString() + 4073 " did not call through to super.onStart()"); 4074 } 4075 mFragments.dispatchStart(); 4076 } 4077 4078 final void performRestart() { 4079 synchronized (mManagedCursors) { 4080 final int N = mManagedCursors.size(); 4081 for (int i=0; i<N; i++) { 4082 ManagedCursor mc = mManagedCursors.get(i); 4083 if (mc.mReleased || mc.mUpdated) { 4084 mc.mCursor.requery(); 4085 mc.mReleased = false; 4086 mc.mUpdated = false; 4087 } 4088 } 4089 } 4090 4091 if (mStopped) { 4092 mStopped = false; 4093 mCalled = false; 4094 mInstrumentation.callActivityOnRestart(this); 4095 if (!mCalled) { 4096 throw new SuperNotCalledException( 4097 "Activity " + mComponent.toShortString() + 4098 " did not call through to super.onRestart()"); 4099 } 4100 performStart(); 4101 } 4102 } 4103 4104 final void performResume() { 4105 performRestart(); 4106 4107 mLastNonConfigurationInstance = null; 4108 4109 // First call onResume() -before- setting mResumed, so we don't 4110 // send out any status bar / menu notifications the client makes. 4111 mCalled = false; 4112 mInstrumentation.callActivityOnResume(this); 4113 if (!mCalled) { 4114 throw new SuperNotCalledException( 4115 "Activity " + mComponent.toShortString() + 4116 " did not call through to super.onResume()"); 4117 } 4118 4119 // Now really resume, and install the current status bar and menu. 4120 mResumed = true; 4121 mCalled = false; 4122 4123 mFragments.dispatchResume(); 4124 4125 onPostResume(); 4126 if (!mCalled) { 4127 throw new SuperNotCalledException( 4128 "Activity " + mComponent.toShortString() + 4129 " did not call through to super.onPostResume()"); 4130 } 4131 } 4132 4133 final void performPause() { 4134 mFragments.dispatchPause(); 4135 onPause(); 4136 } 4137 4138 final void performUserLeaving() { 4139 onUserInteraction(); 4140 onUserLeaveHint(); 4141 } 4142 4143 final void performStop() { 4144 if (!mStopped) { 4145 if (mWindow != null) { 4146 mWindow.closeAllPanels(); 4147 } 4148 4149 mFragments.dispatchStop(); 4150 4151 mCalled = false; 4152 mInstrumentation.callActivityOnStop(this); 4153 if (!mCalled) { 4154 throw new SuperNotCalledException( 4155 "Activity " + mComponent.toShortString() + 4156 " did not call through to super.onStop()"); 4157 } 4158 4159 synchronized (mManagedCursors) { 4160 final int N = mManagedCursors.size(); 4161 for (int i=0; i<N; i++) { 4162 ManagedCursor mc = mManagedCursors.get(i); 4163 if (!mc.mReleased) { 4164 mc.mCursor.deactivate(); 4165 mc.mReleased = true; 4166 } 4167 } 4168 } 4169 4170 mStopped = true; 4171 } 4172 mResumed = false; 4173 } 4174 4175 final void performDestroy() { 4176 mFragments.dispatchDestroy(); 4177 onDestroy(); 4178 } 4179 4180 final boolean isResumed() { 4181 return mResumed; 4182 } 4183 4184 void dispatchActivityResult(String who, int requestCode, 4185 int resultCode, Intent data) { 4186 if (Config.LOGV) Log.v( 4187 TAG, "Dispatching result: who=" + who + ", reqCode=" + requestCode 4188 + ", resCode=" + resultCode + ", data=" + data); 4189 if (who == null) { 4190 onActivityResult(requestCode, resultCode, data); 4191 } 4192 } 4193} 4194