Context.java revision 8264408f5995534f8e3147b001664ea0df52aaa5
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.content; 18 19import android.content.pm.ApplicationInfo; 20import android.content.pm.PackageManager; 21import android.content.res.AssetManager; 22import android.content.res.Resources; 23import android.content.res.TypedArray; 24import android.database.DatabaseErrorHandler; 25import android.database.sqlite.SQLiteDatabase; 26import android.database.sqlite.SQLiteDatabase.CursorFactory; 27import android.graphics.Bitmap; 28import android.graphics.drawable.Drawable; 29import android.media.MediaScannerConnection.OnScanCompletedListener; 30import android.net.Uri; 31import android.os.Bundle; 32import android.os.Handler; 33import android.os.Looper; 34import android.util.AttributeSet; 35 36import java.io.File; 37import java.io.FileInputStream; 38import java.io.FileNotFoundException; 39import java.io.FileOutputStream; 40import java.io.IOException; 41import java.io.InputStream; 42 43/** 44 * Interface to global information about an application environment. This is 45 * an abstract class whose implementation is provided by 46 * the Android system. It 47 * allows access to application-specific resources and classes, as well as 48 * up-calls for application-level operations such as launching activities, 49 * broadcasting and receiving intents, etc. 50 */ 51public abstract class Context { 52 /** 53 * File creation mode: the default mode, where the created file can only 54 * be accessed by the calling application (or all applications sharing the 55 * same user ID). 56 * @see #MODE_WORLD_READABLE 57 * @see #MODE_WORLD_WRITEABLE 58 */ 59 public static final int MODE_PRIVATE = 0x0000; 60 /** 61 * File creation mode: allow all other applications to have read access 62 * to the created file. 63 * @see #MODE_PRIVATE 64 * @see #MODE_WORLD_WRITEABLE 65 */ 66 public static final int MODE_WORLD_READABLE = 0x0001; 67 /** 68 * File creation mode: allow all other applications to have write access 69 * to the created file. 70 * @see #MODE_PRIVATE 71 * @see #MODE_WORLD_READABLE 72 */ 73 public static final int MODE_WORLD_WRITEABLE = 0x0002; 74 /** 75 * File creation mode: for use with {@link #openFileOutput}, if the file 76 * already exists then write data to the end of the existing file 77 * instead of erasing it. 78 * @see #openFileOutput 79 */ 80 public static final int MODE_APPEND = 0x8000; 81 82 /** 83 * SharedPreference loading flag: when set, the file on disk will 84 * be checked for modification even if the shared preferences 85 * instance is already loaded in this process. This behavior is 86 * sometimes desired in cases where the application has multiple 87 * processes, all writing to the same SharedPreferences file. 88 * Generally there are better forms of communication between 89 * processes, though. 90 * 91 * <p>This was the legacy (but undocumented) behavior in and 92 * before Gingerbread (Android 2.3) and this flag is implied when 93 * targetting such releases. For applications targetting SDK 94 * versions <em>greater than</em> Android 2.3, this flag must be 95 * explicitly set if desired. 96 * 97 * @see #getSharedPreferences 98 */ 99 public static final int MODE_MULTI_PROCESS = 0x0004; 100 101 /** 102 * Database open flag: when set, the database is opened with write-ahead 103 * logging enabled by default. 104 * 105 * @see #openOrCreateDatabase(String, int, CursorFactory) 106 * @see #openOrCreateDatabase(String, int, CursorFactory, DatabaseErrorHandler) 107 * @see SQLiteDatabase#enableWriteAheadLogging 108 */ 109 public static final int MODE_ENABLE_WRITE_AHEAD_LOGGING = 0x0008; 110 111 /** 112 * Flag for {@link #bindService}: automatically create the service as long 113 * as the binding exists. Note that while this will create the service, 114 * its {@link android.app.Service#onStartCommand} 115 * method will still only be called due to an 116 * explicit call to {@link #startService}. Even without that, though, 117 * this still provides you with access to the service object while the 118 * service is created. 119 * 120 * <p>Note that prior to {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH}, 121 * not supplying this flag would also impact how important the system 122 * consider's the target service's process to be. When set, the only way 123 * for it to be raised was by binding from a service in which case it will 124 * only be important when that activity is in the foreground. Now to 125 * achieve this behavior you must explicitly supply the new flag 126 * {@link #BIND_ADJUST_WITH_ACTIVITY}. For compatibility, old applications 127 * that don't specify {@link #BIND_AUTO_CREATE} will automatically have 128 * the flags {@link #BIND_WAIVE_PRIORITY} and 129 * {@link #BIND_ADJUST_WITH_ACTIVITY} set for them in order to achieve 130 * the same result. 131 */ 132 public static final int BIND_AUTO_CREATE = 0x0001; 133 134 /** 135 * Flag for {@link #bindService}: include debugging help for mismatched 136 * calls to unbind. When this flag is set, the callstack of the following 137 * {@link #unbindService} call is retained, to be printed if a later 138 * incorrect unbind call is made. Note that doing this requires retaining 139 * information about the binding that was made for the lifetime of the app, 140 * resulting in a leak -- this should only be used for debugging. 141 */ 142 public static final int BIND_DEBUG_UNBIND = 0x0002; 143 144 /** 145 * Flag for {@link #bindService}: don't allow this binding to raise 146 * the target service's process to the foreground scheduling priority. 147 * It will still be raised to at least the same memory priority 148 * as the client (so that its process will not be killable in any 149 * situation where the client is not killable), but for CPU scheduling 150 * purposes it may be left in the background. This only has an impact 151 * in the situation where the binding client is a foreground process 152 * and the target service is in a background process. 153 */ 154 public static final int BIND_NOT_FOREGROUND = 0x0004; 155 156 /** 157 * Flag for {@link #bindService}: indicates that the client application 158 * binding to this service considers the service to be more important than 159 * the app itself. When set, the platform will try to have the out of 160 * memory kill the app before it kills the service it is bound to, though 161 * this is not guaranteed to be the case. 162 */ 163 public static final int BIND_ABOVE_CLIENT = 0x0008; 164 165 /** 166 * Flag for {@link #bindService}: allow the process hosting the bound 167 * service to go through its normal memory management. It will be 168 * treated more like a running service, allowing the system to 169 * (temporarily) expunge the process if low on memory or for some other 170 * whim it may have, and being more aggressive about making it a candidate 171 * to be killed (and restarted) if running for a long time. 172 */ 173 public static final int BIND_ALLOW_OOM_MANAGEMENT = 0x0010; 174 175 /** 176 * Flag for {@link #bindService}: don't impact the scheduling or 177 * memory management priority of the target service's hosting process. 178 * Allows the service's process to be managed on the background LRU list 179 * just like a regular application process in the background. 180 */ 181 public static final int BIND_WAIVE_PRIORITY = 0x0020; 182 183 /** 184 * Flag for {@link #bindService}: this service is very important to 185 * the client, so should be brought to the foreground process level 186 * when the client is. Normally a process can only be raised to the 187 * visibility level by a client, even if that client is in the foreground. 188 */ 189 public static final int BIND_IMPORTANT = 0x0040; 190 191 /** 192 * Flag for {@link #bindService}: If binding from an activity, allow the 193 * target service's process importance to be raised based on whether the 194 * activity is visible to the user, regardless whether another flag is 195 * used to reduce the amount that the client process's overall importance 196 * is used to impact it. 197 */ 198 public static final int BIND_ADJUST_WITH_ACTIVITY = 0x0080; 199 200 /** 201 * Flag for {@link #bindService}: Don't consider the bound service to be 202 * visible, even if the caller is visible. 203 * @hide 204 */ 205 public static final int BIND_NOT_VISIBLE = 0x40000000; 206 207 /** Return an AssetManager instance for your application's package. */ 208 public abstract AssetManager getAssets(); 209 210 /** Return a Resources instance for your application's package. */ 211 public abstract Resources getResources(); 212 213 /** Return PackageManager instance to find global package information. */ 214 public abstract PackageManager getPackageManager(); 215 216 /** Return a ContentResolver instance for your application's package. */ 217 public abstract ContentResolver getContentResolver(); 218 219 /** 220 * Return the Looper for the main thread of the current process. This is 221 * the thread used to dispatch calls to application components (activities, 222 * services, etc). 223 */ 224 public abstract Looper getMainLooper(); 225 226 /** 227 * Return the context of the single, global Application object of the 228 * current process. This generally should only be used if you need a 229 * Context whose lifecycle is separate from the current context, that is 230 * tied to the lifetime of the process rather than the current component. 231 * 232 * <p>Consider for example how this interacts with 233 * {@link #registerReceiver(BroadcastReceiver, IntentFilter)}: 234 * <ul> 235 * <li> <p>If used from an Activity context, the receiver is being registered 236 * within that activity. This means that you are expected to unregister 237 * before the activity is done being destroyed; in fact if you do not do 238 * so, the framework will clean up your leaked registration as it removes 239 * the activity and log an error. Thus, if you use the Activity context 240 * to register a receiver that is static (global to the process, not 241 * associated with an Activity instance) then that registration will be 242 * removed on you at whatever point the activity you used is destroyed. 243 * <li> <p>If used from the Context returned here, the receiver is being 244 * registered with the global state associated with your application. Thus 245 * it will never be unregistered for you. This is necessary if the receiver 246 * is associated with static data, not a particular component. However 247 * using the ApplicationContext elsewhere can easily lead to serious leaks 248 * if you forget to unregister, unbind, etc. 249 * </ul> 250 */ 251 public abstract Context getApplicationContext(); 252 253 /** 254 * Add a new {@link ComponentCallbacks} to the base application of the 255 * Context, which will be called at the same times as the ComponentCallbacks 256 * methods of activities and other components are called. Note that you 257 * <em>must</em> be sure to use {@link #unregisterComponentCallbacks} when 258 * appropriate in the future; this will not be removed for you. 259 * 260 * @param callback The interface to call. This can be either a 261 * {@link ComponentCallbacks} or {@link ComponentCallbacks2} interface. 262 */ 263 public void registerComponentCallbacks(ComponentCallbacks callback) { 264 getApplicationContext().registerComponentCallbacks(callback); 265 } 266 267 /** 268 * Remove a {@link ComponentCallbacks} objec that was previously registered 269 * with {@link #registerComponentCallbacks(ComponentCallbacks)}. 270 */ 271 public void unregisterComponentCallbacks(ComponentCallbacks callback) { 272 getApplicationContext().unregisterComponentCallbacks(callback); 273 } 274 275 /** 276 * Return a localized, styled CharSequence from the application's package's 277 * default string table. 278 * 279 * @param resId Resource id for the CharSequence text 280 */ 281 public final CharSequence getText(int resId) { 282 return getResources().getText(resId); 283 } 284 285 /** 286 * Return a localized string from the application's package's 287 * default string table. 288 * 289 * @param resId Resource id for the string 290 */ 291 public final String getString(int resId) { 292 return getResources().getString(resId); 293 } 294 295 /** 296 * Return a localized formatted string from the application's package's 297 * default string table, substituting the format arguments as defined in 298 * {@link java.util.Formatter} and {@link java.lang.String#format}. 299 * 300 * @param resId Resource id for the format string 301 * @param formatArgs The format arguments that will be used for substitution. 302 */ 303 304 public final String getString(int resId, Object... formatArgs) { 305 return getResources().getString(resId, formatArgs); 306 } 307 308 /** 309 * Set the base theme for this context. Note that this should be called 310 * before any views are instantiated in the Context (for example before 311 * calling {@link android.app.Activity#setContentView} or 312 * {@link android.view.LayoutInflater#inflate}). 313 * 314 * @param resid The style resource describing the theme. 315 */ 316 public abstract void setTheme(int resid); 317 318 /** @hide Needed for some internal implementation... not public because 319 * you can't assume this actually means anything. */ 320 public int getThemeResId() { 321 return 0; 322 } 323 324 /** 325 * Return the Theme object associated with this Context. 326 */ 327 public abstract Resources.Theme getTheme(); 328 329 /** 330 * Retrieve styled attribute information in this Context's theme. See 331 * {@link Resources.Theme#obtainStyledAttributes(int[])} 332 * for more information. 333 * 334 * @see Resources.Theme#obtainStyledAttributes(int[]) 335 */ 336 public final TypedArray obtainStyledAttributes( 337 int[] attrs) { 338 return getTheme().obtainStyledAttributes(attrs); 339 } 340 341 /** 342 * Retrieve styled attribute information in this Context's theme. See 343 * {@link Resources.Theme#obtainStyledAttributes(int, int[])} 344 * for more information. 345 * 346 * @see Resources.Theme#obtainStyledAttributes(int, int[]) 347 */ 348 public final TypedArray obtainStyledAttributes( 349 int resid, int[] attrs) throws Resources.NotFoundException { 350 return getTheme().obtainStyledAttributes(resid, attrs); 351 } 352 353 /** 354 * Retrieve styled attribute information in this Context's theme. See 355 * {@link Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)} 356 * for more information. 357 * 358 * @see Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 359 */ 360 public final TypedArray obtainStyledAttributes( 361 AttributeSet set, int[] attrs) { 362 return getTheme().obtainStyledAttributes(set, attrs, 0, 0); 363 } 364 365 /** 366 * Retrieve styled attribute information in this Context's theme. See 367 * {@link Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)} 368 * for more information. 369 * 370 * @see Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 371 */ 372 public final TypedArray obtainStyledAttributes( 373 AttributeSet set, int[] attrs, int defStyleAttr, int defStyleRes) { 374 return getTheme().obtainStyledAttributes( 375 set, attrs, defStyleAttr, defStyleRes); 376 } 377 378 /** 379 * Return a class loader you can use to retrieve classes in this package. 380 */ 381 public abstract ClassLoader getClassLoader(); 382 383 /** Return the name of this application's package. */ 384 public abstract String getPackageName(); 385 386 /** Return the full application info for this context's package. */ 387 public abstract ApplicationInfo getApplicationInfo(); 388 389 /** 390 * Return the full path to this context's primary Android package. 391 * The Android package is a ZIP file which contains the application's 392 * primary resources. 393 * 394 * <p>Note: this is not generally useful for applications, since they should 395 * not be directly accessing the file system. 396 * 397 * @return String Path to the resources. 398 */ 399 public abstract String getPackageResourcePath(); 400 401 /** 402 * Return the full path to this context's primary Android package. 403 * The Android package is a ZIP file which contains application's 404 * primary code and assets. 405 * 406 * <p>Note: this is not generally useful for applications, since they should 407 * not be directly accessing the file system. 408 * 409 * @return String Path to the code and assets. 410 */ 411 public abstract String getPackageCodePath(); 412 413 /** 414 * {@hide} 415 * Return the full path to the shared prefs file for the given prefs group name. 416 * 417 * <p>Note: this is not generally useful for applications, since they should 418 * not be directly accessing the file system. 419 */ 420 public abstract File getSharedPrefsFile(String name); 421 422 /** 423 * Retrieve and hold the contents of the preferences file 'name', returning 424 * a SharedPreferences through which you can retrieve and modify its 425 * values. Only one instance of the SharedPreferences object is returned 426 * to any callers for the same name, meaning they will see each other's 427 * edits as soon as they are made. 428 * 429 * @param name Desired preferences file. If a preferences file by this name 430 * does not exist, it will be created when you retrieve an 431 * editor (SharedPreferences.edit()) and then commit changes (Editor.commit()). 432 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 433 * default operation, {@link #MODE_WORLD_READABLE} 434 * and {@link #MODE_WORLD_WRITEABLE} to control permissions. The bit 435 * {@link #MODE_MULTI_PROCESS} can also be used if multiple processes 436 * are mutating the same SharedPreferences file. {@link #MODE_MULTI_PROCESS} 437 * is always on in apps targetting Gingerbread (Android 2.3) and below, and 438 * off by default in later versions. 439 * 440 * @return Returns the single SharedPreferences instance that can be used 441 * to retrieve and modify the preference values. 442 * 443 * @see #MODE_PRIVATE 444 * @see #MODE_WORLD_READABLE 445 * @see #MODE_WORLD_WRITEABLE 446 * @see #MODE_MULTI_PROCESS 447 */ 448 public abstract SharedPreferences getSharedPreferences(String name, 449 int mode); 450 451 /** 452 * Open a private file associated with this Context's application package 453 * for reading. 454 * 455 * @param name The name of the file to open; can not contain path 456 * separators. 457 * 458 * @return FileInputStream Resulting input stream. 459 * 460 * @see #openFileOutput 461 * @see #fileList 462 * @see #deleteFile 463 * @see java.io.FileInputStream#FileInputStream(String) 464 */ 465 public abstract FileInputStream openFileInput(String name) 466 throws FileNotFoundException; 467 468 /** 469 * Open a private file associated with this Context's application package 470 * for writing. Creates the file if it doesn't already exist. 471 * 472 * @param name The name of the file to open; can not contain path 473 * separators. 474 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 475 * default operation, {@link #MODE_APPEND} to append to an existing file, 476 * {@link #MODE_WORLD_READABLE} and {@link #MODE_WORLD_WRITEABLE} to control 477 * permissions. 478 * 479 * @return FileOutputStream Resulting output stream. 480 * 481 * @see #MODE_APPEND 482 * @see #MODE_PRIVATE 483 * @see #MODE_WORLD_READABLE 484 * @see #MODE_WORLD_WRITEABLE 485 * @see #openFileInput 486 * @see #fileList 487 * @see #deleteFile 488 * @see java.io.FileOutputStream#FileOutputStream(String) 489 */ 490 public abstract FileOutputStream openFileOutput(String name, int mode) 491 throws FileNotFoundException; 492 493 /** 494 * Delete the given private file associated with this Context's 495 * application package. 496 * 497 * @param name The name of the file to delete; can not contain path 498 * separators. 499 * 500 * @return True if the file was successfully deleted; else 501 * false. 502 * 503 * @see #openFileInput 504 * @see #openFileOutput 505 * @see #fileList 506 * @see java.io.File#delete() 507 */ 508 public abstract boolean deleteFile(String name); 509 510 /** 511 * Returns the absolute path on the filesystem where a file created with 512 * {@link #openFileOutput} is stored. 513 * 514 * @param name The name of the file for which you would like to get 515 * its path. 516 * 517 * @return Returns an absolute path to the given file. 518 * 519 * @see #openFileOutput 520 * @see #getFilesDir 521 * @see #getDir 522 */ 523 public abstract File getFileStreamPath(String name); 524 525 /** 526 * Returns the absolute path to the directory on the filesystem where 527 * files created with {@link #openFileOutput} are stored. 528 * 529 * @return Returns the path of the directory holding application files. 530 * 531 * @see #openFileOutput 532 * @see #getFileStreamPath 533 * @see #getDir 534 */ 535 public abstract File getFilesDir(); 536 537 /** 538 * Returns the absolute path to the directory on the external filesystem 539 * (that is somewhere on {@link android.os.Environment#getExternalStorageDirectory() 540 * Environment.getExternalStorageDirectory()}) where the application can 541 * place persistent files it owns. These files are private to the 542 * applications, and not typically visible to the user as media. 543 * 544 * <p>This is like {@link #getFilesDir()} in that these 545 * files will be deleted when the application is uninstalled, however there 546 * are some important differences: 547 * 548 * <ul> 549 * <li>External files are not always available: they will disappear if the 550 * user mounts the external storage on a computer or removes it. See the 551 * APIs on {@link android.os.Environment} for information in the storage state. 552 * <li>There is no security enforced with these files. All applications 553 * can read and write files placed here. 554 * </ul> 555 * 556 * <p>Here is an example of typical code to manipulate a file in 557 * an application's private storage:</p> 558 * 559 * {@sample development/samples/ApiDemos/src/com/example/android/apis/content/ExternalStorage.java 560 * private_file} 561 * 562 * <p>If you supply a non-null <var>type</var> to this function, the returned 563 * file will be a path to a sub-directory of the given type. Though these files 564 * are not automatically scanned by the media scanner, you can explicitly 565 * add them to the media database with 566 * {@link android.media.MediaScannerConnection#scanFile(Context, String[], String[], 567 * OnScanCompletedListener) MediaScannerConnection.scanFile}. 568 * Note that this is not the same as 569 * {@link android.os.Environment#getExternalStoragePublicDirectory 570 * Environment.getExternalStoragePublicDirectory()}, which provides 571 * directories of media shared by all applications. The 572 * directories returned here are 573 * owned by the application, and their contents will be removed when the 574 * application is uninstalled. Unlike 575 * {@link android.os.Environment#getExternalStoragePublicDirectory 576 * Environment.getExternalStoragePublicDirectory()}, the directory 577 * returned here will be automatically created for you. 578 * 579 * <p>Here is an example of typical code to manipulate a picture in 580 * an application's private storage and add it to the media database:</p> 581 * 582 * {@sample development/samples/ApiDemos/src/com/example/android/apis/content/ExternalStorage.java 583 * private_picture} 584 * 585 * @param type The type of files directory to return. May be null for 586 * the root of the files directory or one of 587 * the following Environment constants for a subdirectory: 588 * {@link android.os.Environment#DIRECTORY_MUSIC}, 589 * {@link android.os.Environment#DIRECTORY_PODCASTS}, 590 * {@link android.os.Environment#DIRECTORY_RINGTONES}, 591 * {@link android.os.Environment#DIRECTORY_ALARMS}, 592 * {@link android.os.Environment#DIRECTORY_NOTIFICATIONS}, 593 * {@link android.os.Environment#DIRECTORY_PICTURES}, or 594 * {@link android.os.Environment#DIRECTORY_MOVIES}. 595 * 596 * @return Returns the path of the directory holding application files 597 * on external storage. Returns null if external storage is not currently 598 * mounted so it could not ensure the path exists; you will need to call 599 * this method again when it is available. 600 * 601 * @see #getFilesDir 602 * @see android.os.Environment#getExternalStoragePublicDirectory 603 */ 604 public abstract File getExternalFilesDir(String type); 605 606 /** 607 * Return the directory where this application's OBB files (if there 608 * are any) can be found. Note if the application does not have any OBB 609 * files, this directory may not exist. 610 */ 611 public abstract File getObbDir(); 612 613 /** 614 * Returns the absolute path to the application specific cache directory 615 * on the filesystem. These files will be ones that get deleted first when the 616 * device runs low on storage. 617 * There is no guarantee when these files will be deleted. 618 * 619 * <strong>Note: you should not <em>rely</em> on the system deleting these 620 * files for you; you should always have a reasonable maximum, such as 1 MB, 621 * for the amount of space you consume with cache files, and prune those 622 * files when exceeding that space.</strong> 623 * 624 * @return Returns the path of the directory holding application cache files. 625 * 626 * @see #openFileOutput 627 * @see #getFileStreamPath 628 * @see #getDir 629 */ 630 public abstract File getCacheDir(); 631 632 /** 633 * Returns the absolute path to the directory on the external filesystem 634 * (that is somewhere on {@link android.os.Environment#getExternalStorageDirectory() 635 * Environment.getExternalStorageDirectory()} where the application can 636 * place cache files it owns. 637 * 638 * <p>This is like {@link #getCacheDir()} in that these 639 * files will be deleted when the application is uninstalled, however there 640 * are some important differences: 641 * 642 * <ul> 643 * <li>The platform does not monitor the space available in external storage, 644 * and thus will not automatically delete these files. Note that you should 645 * be managing the maximum space you will use for these anyway, just like 646 * with {@link #getCacheDir()}. 647 * <li>External files are not always available: they will disappear if the 648 * user mounts the external storage on a computer or removes it. See the 649 * APIs on {@link android.os.Environment} for information in the storage state. 650 * <li>There is no security enforced with these files. All applications 651 * can read and write files placed here. 652 * </ul> 653 * 654 * @return Returns the path of the directory holding application cache files 655 * on external storage. Returns null if external storage is not currently 656 * mounted so it could not ensure the path exists; you will need to call 657 * this method again when it is available. 658 * 659 * @see #getCacheDir 660 */ 661 public abstract File getExternalCacheDir(); 662 663 /** 664 * Returns an array of strings naming the private files associated with 665 * this Context's application package. 666 * 667 * @return Array of strings naming the private files. 668 * 669 * @see #openFileInput 670 * @see #openFileOutput 671 * @see #deleteFile 672 */ 673 public abstract String[] fileList(); 674 675 /** 676 * Retrieve, creating if needed, a new directory in which the application 677 * can place its own custom data files. You can use the returned File 678 * object to create and access files in this directory. Note that files 679 * created through a File object will only be accessible by your own 680 * application; you can only set the mode of the entire directory, not 681 * of individual files. 682 * 683 * @param name Name of the directory to retrieve. This is a directory 684 * that is created as part of your application data. 685 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 686 * default operation, {@link #MODE_WORLD_READABLE} and 687 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 688 * 689 * @return Returns a File object for the requested directory. The directory 690 * will have been created if it does not already exist. 691 * 692 * @see #openFileOutput(String, int) 693 */ 694 public abstract File getDir(String name, int mode); 695 696 /** 697 * Open a new private SQLiteDatabase associated with this Context's 698 * application package. Create the database file if it doesn't exist. 699 * 700 * @param name The name (unique in the application package) of the database. 701 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 702 * default operation, {@link #MODE_WORLD_READABLE} 703 * and {@link #MODE_WORLD_WRITEABLE} to control permissions. 704 * Use {@link #MODE_ENABLE_WRITE_AHEAD_LOGGING} to enable write-ahead logging by default. 705 * @param factory An optional factory class that is called to instantiate a 706 * cursor when query is called. 707 * 708 * @return The contents of a newly created database with the given name. 709 * @throws android.database.sqlite.SQLiteException if the database file could not be opened. 710 * 711 * @see #MODE_PRIVATE 712 * @see #MODE_WORLD_READABLE 713 * @see #MODE_WORLD_WRITEABLE 714 * @see #MODE_ENABLE_WRITE_AHEAD_LOGGING 715 * @see #deleteDatabase 716 */ 717 public abstract SQLiteDatabase openOrCreateDatabase(String name, 718 int mode, CursorFactory factory); 719 720 /** 721 * Open a new private SQLiteDatabase associated with this Context's 722 * application package. Creates the database file if it doesn't exist. 723 * 724 * <p>Accepts input param: a concrete instance of {@link DatabaseErrorHandler} to be 725 * used to handle corruption when sqlite reports database corruption.</p> 726 * 727 * @param name The name (unique in the application package) of the database. 728 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 729 * default operation, {@link #MODE_WORLD_READABLE} 730 * and {@link #MODE_WORLD_WRITEABLE} to control permissions. 731 * Use {@link #MODE_ENABLE_WRITE_AHEAD_LOGGING} to enable write-ahead logging by default. 732 * @param factory An optional factory class that is called to instantiate a 733 * cursor when query is called. 734 * @param errorHandler the {@link DatabaseErrorHandler} to be used when sqlite reports database 735 * corruption. if null, {@link android.database.DefaultDatabaseErrorHandler} is assumed. 736 * @return The contents of a newly created database with the given name. 737 * @throws android.database.sqlite.SQLiteException if the database file could not be opened. 738 * 739 * @see #MODE_PRIVATE 740 * @see #MODE_WORLD_READABLE 741 * @see #MODE_WORLD_WRITEABLE 742 * @see #MODE_ENABLE_WRITE_AHEAD_LOGGING 743 * @see #deleteDatabase 744 */ 745 public abstract SQLiteDatabase openOrCreateDatabase(String name, 746 int mode, CursorFactory factory, DatabaseErrorHandler errorHandler); 747 748 /** 749 * Delete an existing private SQLiteDatabase associated with this Context's 750 * application package. 751 * 752 * @param name The name (unique in the application package) of the 753 * database. 754 * 755 * @return True if the database was successfully deleted; else false. 756 * 757 * @see #openOrCreateDatabase 758 */ 759 public abstract boolean deleteDatabase(String name); 760 761 /** 762 * Returns the absolute path on the filesystem where a database created with 763 * {@link #openOrCreateDatabase} is stored. 764 * 765 * @param name The name of the database for which you would like to get 766 * its path. 767 * 768 * @return Returns an absolute path to the given database. 769 * 770 * @see #openOrCreateDatabase 771 */ 772 public abstract File getDatabasePath(String name); 773 774 /** 775 * Returns an array of strings naming the private databases associated with 776 * this Context's application package. 777 * 778 * @return Array of strings naming the private databases. 779 * 780 * @see #openOrCreateDatabase 781 * @see #deleteDatabase 782 */ 783 public abstract String[] databaseList(); 784 785 /** 786 * @deprecated Use {@link android.app.WallpaperManager#getDrawable 787 * WallpaperManager.get()} instead. 788 */ 789 @Deprecated 790 public abstract Drawable getWallpaper(); 791 792 /** 793 * @deprecated Use {@link android.app.WallpaperManager#peekDrawable 794 * WallpaperManager.peek()} instead. 795 */ 796 @Deprecated 797 public abstract Drawable peekWallpaper(); 798 799 /** 800 * @deprecated Use {@link android.app.WallpaperManager#getDesiredMinimumWidth() 801 * WallpaperManager.getDesiredMinimumWidth()} instead. 802 */ 803 @Deprecated 804 public abstract int getWallpaperDesiredMinimumWidth(); 805 806 /** 807 * @deprecated Use {@link android.app.WallpaperManager#getDesiredMinimumHeight() 808 * WallpaperManager.getDesiredMinimumHeight()} instead. 809 */ 810 @Deprecated 811 public abstract int getWallpaperDesiredMinimumHeight(); 812 813 /** 814 * @deprecated Use {@link android.app.WallpaperManager#setBitmap(Bitmap) 815 * WallpaperManager.set()} instead. 816 * <p>This method requires the caller to hold the permission 817 * {@link android.Manifest.permission#SET_WALLPAPER}. 818 */ 819 @Deprecated 820 public abstract void setWallpaper(Bitmap bitmap) throws IOException; 821 822 /** 823 * @deprecated Use {@link android.app.WallpaperManager#setStream(InputStream) 824 * WallpaperManager.set()} instead. 825 * <p>This method requires the caller to hold the permission 826 * {@link android.Manifest.permission#SET_WALLPAPER}. 827 */ 828 @Deprecated 829 public abstract void setWallpaper(InputStream data) throws IOException; 830 831 /** 832 * @deprecated Use {@link android.app.WallpaperManager#clear 833 * WallpaperManager.clear()} instead. 834 * <p>This method requires the caller to hold the permission 835 * {@link android.Manifest.permission#SET_WALLPAPER}. 836 */ 837 @Deprecated 838 public abstract void clearWallpaper() throws IOException; 839 840 /** 841 * Same as {@link #startActivity(Intent, Bundle)} with no options 842 * specified. 843 * 844 * @param intent The description of the activity to start. 845 * 846 * @throws ActivityNotFoundException 847 * 848 * @see {@link #startActivity(Intent, Bundle)} 849 * @see PackageManager#resolveActivity 850 */ 851 public abstract void startActivity(Intent intent); 852 853 /** 854 * Same as {@link #startActivity(Intent)}, but for a specific user. It requires holding 855 * the {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} permission. 856 * @param intent The description of the activity to start. 857 * @param userId The user id of the user to start this activity for. 858 * @throws ActivityNotFoundException 859 * @hide 860 */ 861 public void startActivityAsUser(Intent intent, int userId) { 862 throw new RuntimeException("Not implemented. Must override in a subclass."); 863 } 864 865 /** 866 * Launch a new activity. You will not receive any information about when 867 * the activity exits. 868 * 869 * <p>Note that if this method is being called from outside of an 870 * {@link android.app.Activity} Context, then the Intent must include 871 * the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag. This is because, 872 * without being started from an existing Activity, there is no existing 873 * task in which to place the new activity and thus it needs to be placed 874 * in its own separate task. 875 * 876 * <p>This method throws {@link ActivityNotFoundException} 877 * if there was no Activity found to run the given Intent. 878 * 879 * @param intent The description of the activity to start. 880 * @param options Additional options for how the Activity should be started. 881 * May be null if there are no options. See {@link android.app.ActivityOptions} 882 * for how to build the Bundle supplied here; there are no supported definitions 883 * for building it manually. 884 * 885 * @throws ActivityNotFoundException 886 * 887 * @see #startActivity(Intent) 888 * @see PackageManager#resolveActivity 889 */ 890 public abstract void startActivity(Intent intent, Bundle options); 891 892 /** 893 * Same as {@link #startActivities(Intent[], Bundle)} with no options 894 * specified. 895 * 896 * @param intents An array of Intents to be started. 897 * 898 * @throws ActivityNotFoundException 899 * 900 * @see {@link #startActivities(Intent[], Bundle)} 901 * @see PackageManager#resolveActivity 902 */ 903 public abstract void startActivities(Intent[] intents); 904 905 /** 906 * Launch multiple new activities. This is generally the same as calling 907 * {@link #startActivity(Intent)} for the first Intent in the array, 908 * that activity during its creation calling {@link #startActivity(Intent)} 909 * for the second entry, etc. Note that unlike that approach, generally 910 * none of the activities except the last in the array will be created 911 * at this point, but rather will be created when the user first visits 912 * them (due to pressing back from the activity on top). 913 * 914 * <p>This method throws {@link ActivityNotFoundException} 915 * if there was no Activity found for <em>any</em> given Intent. In this 916 * case the state of the activity stack is undefined (some Intents in the 917 * list may be on it, some not), so you probably want to avoid such situations. 918 * 919 * @param intents An array of Intents to be started. 920 * @param options Additional options for how the Activity should be started. 921 * See {@link android.content.Context#startActivity(Intent, Bundle) 922 * Context.startActivity(Intent, Bundle)} for more details. 923 * 924 * @throws ActivityNotFoundException 925 * 926 * @see {@link #startActivities(Intent[])} 927 * @see PackageManager#resolveActivity 928 */ 929 public abstract void startActivities(Intent[] intents, Bundle options); 930 931 /** 932 * Same as {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)} 933 * with no options specified. 934 * 935 * @param intent The IntentSender to launch. 936 * @param fillInIntent If non-null, this will be provided as the 937 * intent parameter to {@link IntentSender#sendIntent}. 938 * @param flagsMask Intent flags in the original IntentSender that you 939 * would like to change. 940 * @param flagsValues Desired values for any bits set in 941 * <var>flagsMask</var> 942 * @param extraFlags Always set to 0. 943 * 944 * @see #startActivity(Intent) 945 * @see #startIntentSender(IntentSender, Intent, int, int, int, Bundle) 946 */ 947 public abstract void startIntentSender(IntentSender intent, 948 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 949 throws IntentSender.SendIntentException; 950 951 /** 952 * Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender 953 * to start. If the IntentSender is for an activity, that activity will be started 954 * as if you had called the regular {@link #startActivity(Intent)} 955 * here; otherwise, its associated action will be executed (such as 956 * sending a broadcast) as if you had called 957 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 958 * 959 * @param intent The IntentSender to launch. 960 * @param fillInIntent If non-null, this will be provided as the 961 * intent parameter to {@link IntentSender#sendIntent}. 962 * @param flagsMask Intent flags in the original IntentSender that you 963 * would like to change. 964 * @param flagsValues Desired values for any bits set in 965 * <var>flagsMask</var> 966 * @param extraFlags Always set to 0. 967 * @param options Additional options for how the Activity should be started. 968 * See {@link android.content.Context#startActivity(Intent, Bundle) 969 * Context.startActivity(Intent, Bundle)} for more details. If options 970 * have also been supplied by the IntentSender, options given here will 971 * override any that conflict with those given by the IntentSender. 972 * 973 * @see #startActivity(Intent, Bundle) 974 * @see #startIntentSender(IntentSender, Intent, int, int, int) 975 */ 976 public abstract void startIntentSender(IntentSender intent, 977 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, 978 Bundle options) throws IntentSender.SendIntentException; 979 980 /** 981 * Broadcast the given intent to all interested BroadcastReceivers. This 982 * call is asynchronous; it returns immediately, and you will continue 983 * executing while the receivers are run. No results are propagated from 984 * receivers and receivers can not abort the broadcast. If you want 985 * to allow receivers to propagate results or abort the broadcast, you must 986 * send an ordered broadcast using 987 * {@link #sendOrderedBroadcast(Intent, String)}. 988 * 989 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 990 * 991 * @param intent The Intent to broadcast; all receivers matching this 992 * Intent will receive the broadcast. 993 * 994 * @see android.content.BroadcastReceiver 995 * @see #registerReceiver 996 * @see #sendBroadcast(Intent, String) 997 * @see #sendOrderedBroadcast(Intent, String) 998 * @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle) 999 */ 1000 public abstract void sendBroadcast(Intent intent); 1001 1002 /** 1003 * Broadcast the given intent to all interested BroadcastReceivers, allowing 1004 * an optional required permission to be enforced. This 1005 * call is asynchronous; it returns immediately, and you will continue 1006 * executing while the receivers are run. No results are propagated from 1007 * receivers and receivers can not abort the broadcast. If you want 1008 * to allow receivers to propagate results or abort the broadcast, you must 1009 * send an ordered broadcast using 1010 * {@link #sendOrderedBroadcast(Intent, String)}. 1011 * 1012 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 1013 * 1014 * @param intent The Intent to broadcast; all receivers matching this 1015 * Intent will receive the broadcast. 1016 * @param receiverPermission (optional) String naming a permission that 1017 * a receiver must hold in order to receive your broadcast. 1018 * If null, no permission is required. 1019 * 1020 * @see android.content.BroadcastReceiver 1021 * @see #registerReceiver 1022 * @see #sendBroadcast(Intent) 1023 * @see #sendOrderedBroadcast(Intent, String) 1024 * @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle) 1025 */ 1026 public abstract void sendBroadcast(Intent intent, 1027 String receiverPermission); 1028 1029 /** 1030 * Broadcast the given intent to all interested BroadcastReceivers, delivering 1031 * them one at a time to allow more preferred receivers to consume the 1032 * broadcast before it is delivered to less preferred receivers. This 1033 * call is asynchronous; it returns immediately, and you will continue 1034 * executing while the receivers are run. 1035 * 1036 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 1037 * 1038 * @param intent The Intent to broadcast; all receivers matching this 1039 * Intent will receive the broadcast. 1040 * @param receiverPermission (optional) String naming a permissions that 1041 * a receiver must hold in order to receive your broadcast. 1042 * If null, no permission is required. 1043 * 1044 * @see android.content.BroadcastReceiver 1045 * @see #registerReceiver 1046 * @see #sendBroadcast(Intent) 1047 * @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle) 1048 */ 1049 public abstract void sendOrderedBroadcast(Intent intent, 1050 String receiverPermission); 1051 1052 /** 1053 * Version of {@link #sendBroadcast(Intent)} that allows you to 1054 * receive data back from the broadcast. This is accomplished by 1055 * supplying your own BroadcastReceiver when calling, which will be 1056 * treated as a final receiver at the end of the broadcast -- its 1057 * {@link BroadcastReceiver#onReceive} method will be called with 1058 * the result values collected from the other receivers. The broadcast will 1059 * be serialized in the same way as calling 1060 * {@link #sendOrderedBroadcast(Intent, String)}. 1061 * 1062 * <p>Like {@link #sendBroadcast(Intent)}, this method is 1063 * asynchronous; it will return before 1064 * resultReceiver.onReceive() is called. 1065 * 1066 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 1067 * 1068 * @param intent The Intent to broadcast; all receivers matching this 1069 * Intent will receive the broadcast. 1070 * @param receiverPermission String naming a permissions that 1071 * a receiver must hold in order to receive your broadcast. 1072 * If null, no permission is required. 1073 * @param resultReceiver Your own BroadcastReceiver to treat as the final 1074 * receiver of the broadcast. 1075 * @param scheduler A custom Handler with which to schedule the 1076 * resultReceiver callback; if null it will be 1077 * scheduled in the Context's main thread. 1078 * @param initialCode An initial value for the result code. Often 1079 * Activity.RESULT_OK. 1080 * @param initialData An initial value for the result data. Often 1081 * null. 1082 * @param initialExtras An initial value for the result extras. Often 1083 * null. 1084 * 1085 * @see #sendBroadcast(Intent) 1086 * @see #sendBroadcast(Intent, String) 1087 * @see #sendOrderedBroadcast(Intent, String) 1088 * @see #sendStickyBroadcast(Intent) 1089 * @see #sendStickyOrderedBroadcast(Intent, BroadcastReceiver, Handler, int, String, Bundle) 1090 * @see android.content.BroadcastReceiver 1091 * @see #registerReceiver 1092 * @see android.app.Activity#RESULT_OK 1093 */ 1094 public abstract void sendOrderedBroadcast(Intent intent, 1095 String receiverPermission, BroadcastReceiver resultReceiver, 1096 Handler scheduler, int initialCode, String initialData, 1097 Bundle initialExtras); 1098 1099 /** 1100 * Same as {@link #sendBroadcast(Intent)}, but for a specific user. This broadcast 1101 * can only be sent to receivers that are part of the calling application. It 1102 * requires holding the {@link android.Manifest.permission#INTERACT_ACROSS_USERS} 1103 * permission. 1104 * @param intent The intent to broadcast 1105 * @param userHandle User to send the intent to. 1106 * @see #sendBroadcast(Intent) 1107 */ 1108 public abstract void sendBroadcastToUser(Intent intent, int userHandle); 1109 1110 /** 1111 * Same as 1112 * {@link #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)}, 1113 * but for a specific user. This broadcast 1114 * can only be sent to receivers that are part of the calling application. It 1115 * requires holding the {@link android.Manifest.permission#INTERACT_ACROSS_USERS} 1116 * permission. 1117 * 1118 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 1119 * 1120 * @param intent The Intent to broadcast; all receivers matching this 1121 * Intent will receive the broadcast. 1122 * @param userHandle User to send the intent to. 1123 * @param resultReceiver Your own BroadcastReceiver to treat as the final 1124 * receiver of the broadcast. 1125 * @param scheduler A custom Handler with which to schedule the 1126 * resultReceiver callback; if null it will be 1127 * scheduled in the Context's main thread. 1128 * @param initialCode An initial value for the result code. Often 1129 * Activity.RESULT_OK. 1130 * @param initialData An initial value for the result data. Often 1131 * null. 1132 * @param initialExtras An initial value for the result extras. Often 1133 * null. 1134 * 1135 * @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle) 1136 */ 1137 public abstract void sendOrderedBroadcastToUser(Intent intent, int userHandle, 1138 BroadcastReceiver resultReceiver, Handler scheduler, 1139 int initialCode, String initialData, Bundle initialExtras); 1140 1141 /** 1142 * Perform a {@link #sendBroadcast(Intent)} that is "sticky," meaning the 1143 * Intent you are sending stays around after the broadcast is complete, 1144 * so that others can quickly retrieve that data through the return 1145 * value of {@link #registerReceiver(BroadcastReceiver, IntentFilter)}. In 1146 * all other ways, this behaves the same as 1147 * {@link #sendBroadcast(Intent)}. 1148 * 1149 * <p>You must hold the {@link android.Manifest.permission#BROADCAST_STICKY} 1150 * permission in order to use this API. If you do not hold that 1151 * permission, {@link SecurityException} will be thrown. 1152 * 1153 * @param intent The Intent to broadcast; all receivers matching this 1154 * Intent will receive the broadcast, and the Intent will be held to 1155 * be re-broadcast to future receivers. 1156 * 1157 * @see #sendBroadcast(Intent) 1158 * @see #sendStickyOrderedBroadcast(Intent, BroadcastReceiver, Handler, int, String, Bundle) 1159 */ 1160 public abstract void sendStickyBroadcast(Intent intent); 1161 1162 /** 1163 * Version of {@link #sendStickyBroadcast} that allows you to 1164 * receive data back from the broadcast. This is accomplished by 1165 * supplying your own BroadcastReceiver when calling, which will be 1166 * treated as a final receiver at the end of the broadcast -- its 1167 * {@link BroadcastReceiver#onReceive} method will be called with 1168 * the result values collected from the other receivers. The broadcast will 1169 * be serialized in the same way as calling 1170 * {@link #sendOrderedBroadcast(Intent, String)}. 1171 * 1172 * <p>Like {@link #sendBroadcast(Intent)}, this method is 1173 * asynchronous; it will return before 1174 * resultReceiver.onReceive() is called. Note that the sticky data 1175 * stored is only the data you initially supply to the broadcast, not 1176 * the result of any changes made by the receivers. 1177 * 1178 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 1179 * 1180 * @param intent The Intent to broadcast; all receivers matching this 1181 * Intent will receive the broadcast. 1182 * @param resultReceiver Your own BroadcastReceiver to treat as the final 1183 * receiver of the broadcast. 1184 * @param scheduler A custom Handler with which to schedule the 1185 * resultReceiver callback; if null it will be 1186 * scheduled in the Context's main thread. 1187 * @param initialCode An initial value for the result code. Often 1188 * Activity.RESULT_OK. 1189 * @param initialData An initial value for the result data. Often 1190 * null. 1191 * @param initialExtras An initial value for the result extras. Often 1192 * null. 1193 * 1194 * @see #sendBroadcast(Intent) 1195 * @see #sendBroadcast(Intent, String) 1196 * @see #sendOrderedBroadcast(Intent, String) 1197 * @see #sendStickyBroadcast(Intent) 1198 * @see android.content.BroadcastReceiver 1199 * @see #registerReceiver 1200 * @see android.app.Activity#RESULT_OK 1201 */ 1202 public abstract void sendStickyOrderedBroadcast(Intent intent, 1203 BroadcastReceiver resultReceiver, 1204 Handler scheduler, int initialCode, String initialData, 1205 Bundle initialExtras); 1206 1207 1208 /** 1209 * Remove the data previously sent with {@link #sendStickyBroadcast}, 1210 * so that it is as if the sticky broadcast had never happened. 1211 * 1212 * <p>You must hold the {@link android.Manifest.permission#BROADCAST_STICKY} 1213 * permission in order to use this API. If you do not hold that 1214 * permission, {@link SecurityException} will be thrown. 1215 * 1216 * @param intent The Intent that was previously broadcast. 1217 * 1218 * @see #sendStickyBroadcast 1219 */ 1220 public abstract void removeStickyBroadcast(Intent intent); 1221 1222 /** 1223 * Register a BroadcastReceiver to be run in the main activity thread. The 1224 * <var>receiver</var> will be called with any broadcast Intent that 1225 * matches <var>filter</var>, in the main application thread. 1226 * 1227 * <p>The system may broadcast Intents that are "sticky" -- these stay 1228 * around after the broadcast as finished, to be sent to any later 1229 * registrations. If your IntentFilter matches one of these sticky 1230 * Intents, that Intent will be returned by this function 1231 * <strong>and</strong> sent to your <var>receiver</var> as if it had just 1232 * been broadcast. 1233 * 1234 * <p>There may be multiple sticky Intents that match <var>filter</var>, 1235 * in which case each of these will be sent to <var>receiver</var>. In 1236 * this case, only one of these can be returned directly by the function; 1237 * which of these that is returned is arbitrarily decided by the system. 1238 * 1239 * <p>If you know the Intent your are registering for is sticky, you can 1240 * supply null for your <var>receiver</var>. In this case, no receiver is 1241 * registered -- the function simply returns the sticky Intent that 1242 * matches <var>filter</var>. In the case of multiple matches, the same 1243 * rules as described above apply. 1244 * 1245 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 1246 * 1247 * <p>As of {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH}, receivers 1248 * registered with this method will correctly respect the 1249 * {@link Intent#setPackage(String)} specified for an Intent being broadcast. 1250 * Prior to that, it would be ignored and delivered to all matching registered 1251 * receivers. Be careful if using this for security.</p> 1252 * 1253 * <p class="note">Note: this method <em>cannot be called from a 1254 * {@link BroadcastReceiver} component;</em> that is, from a BroadcastReceiver 1255 * that is declared in an application's manifest. It is okay, however, to call 1256 * this method from another BroadcastReceiver that has itself been registered 1257 * at run time with {@link #registerReceiver}, since the lifetime of such a 1258 * registered BroadcastReceiver is tied to the object that registered it.</p> 1259 * 1260 * @param receiver The BroadcastReceiver to handle the broadcast. 1261 * @param filter Selects the Intent broadcasts to be received. 1262 * 1263 * @return The first sticky intent found that matches <var>filter</var>, 1264 * or null if there are none. 1265 * 1266 * @see #registerReceiver(BroadcastReceiver, IntentFilter, String, Handler) 1267 * @see #sendBroadcast 1268 * @see #unregisterReceiver 1269 */ 1270 public abstract Intent registerReceiver(BroadcastReceiver receiver, 1271 IntentFilter filter); 1272 1273 /** 1274 * Register to receive intent broadcasts, to run in the context of 1275 * <var>scheduler</var>. See 1276 * {@link #registerReceiver(BroadcastReceiver, IntentFilter)} for more 1277 * information. This allows you to enforce permissions on who can 1278 * broadcast intents to your receiver, or have the receiver run in 1279 * a different thread than the main application thread. 1280 * 1281 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 1282 * 1283 * <p>As of {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH}, receivers 1284 * registered with this method will correctly respect the 1285 * {@link Intent#setPackage(String)} specified for an Intent being broadcast. 1286 * Prior to that, it would be ignored and delivered to all matching registered 1287 * receivers. Be careful if using this for security.</p> 1288 * 1289 * @param receiver The BroadcastReceiver to handle the broadcast. 1290 * @param filter Selects the Intent broadcasts to be received. 1291 * @param broadcastPermission String naming a permissions that a 1292 * broadcaster must hold in order to send an Intent to you. If null, 1293 * no permission is required. 1294 * @param scheduler Handler identifying the thread that will receive 1295 * the Intent. If null, the main thread of the process will be used. 1296 * 1297 * @return The first sticky intent found that matches <var>filter</var>, 1298 * or null if there are none. 1299 * 1300 * @see #registerReceiver(BroadcastReceiver, IntentFilter) 1301 * @see #sendBroadcast 1302 * @see #unregisterReceiver 1303 */ 1304 public abstract Intent registerReceiver(BroadcastReceiver receiver, 1305 IntentFilter filter, 1306 String broadcastPermission, 1307 Handler scheduler); 1308 1309 /** 1310 * Unregister a previously registered BroadcastReceiver. <em>All</em> 1311 * filters that have been registered for this BroadcastReceiver will be 1312 * removed. 1313 * 1314 * @param receiver The BroadcastReceiver to unregister. 1315 * 1316 * @see #registerReceiver 1317 */ 1318 public abstract void unregisterReceiver(BroadcastReceiver receiver); 1319 1320 /** 1321 * Request that a given application service be started. The Intent 1322 * can either contain the complete class name of a specific service 1323 * implementation to start, or an abstract definition through the 1324 * action and other fields of the kind of service to start. If this service 1325 * is not already running, it will be instantiated and started (creating a 1326 * process for it if needed); if it is running then it remains running. 1327 * 1328 * <p>Every call to this method will result in a corresponding call to 1329 * the target service's {@link android.app.Service#onStartCommand} method, 1330 * with the <var>intent</var> given here. This provides a convenient way 1331 * to submit jobs to a service without having to bind and call on to its 1332 * interface. 1333 * 1334 * <p>Using startService() overrides the default service lifetime that is 1335 * managed by {@link #bindService}: it requires the service to remain 1336 * running until {@link #stopService} is called, regardless of whether 1337 * any clients are connected to it. Note that calls to startService() 1338 * are not nesting: no matter how many times you call startService(), 1339 * a single call to {@link #stopService} will stop it. 1340 * 1341 * <p>The system attempts to keep running services around as much as 1342 * possible. The only time they should be stopped is if the current 1343 * foreground application is using so many resources that the service needs 1344 * to be killed. If any errors happen in the service's process, it will 1345 * automatically be restarted. 1346 * 1347 * <p>This function will throw {@link SecurityException} if you do not 1348 * have permission to start the given service. 1349 * 1350 * @param service Identifies the service to be started. The Intent may 1351 * specify either an explicit component name to start, or a logical 1352 * description (action, category, etc) to match an 1353 * {@link IntentFilter} published by a service. Additional values 1354 * may be included in the Intent extras to supply arguments along with 1355 * this specific start call. 1356 * 1357 * @return If the service is being started or is already running, the 1358 * {@link ComponentName} of the actual service that was started is 1359 * returned; else if the service does not exist null is returned. 1360 * 1361 * @throws SecurityException 1362 * 1363 * @see #stopService 1364 * @see #bindService 1365 */ 1366 public abstract ComponentName startService(Intent service); 1367 1368 /** 1369 * Request that a given application service be stopped. If the service is 1370 * not running, nothing happens. Otherwise it is stopped. Note that calls 1371 * to startService() are not counted -- this stops the service no matter 1372 * how many times it was started. 1373 * 1374 * <p>Note that if a stopped service still has {@link ServiceConnection} 1375 * objects bound to it with the {@link #BIND_AUTO_CREATE} set, it will 1376 * not be destroyed until all of these bindings are removed. See 1377 * the {@link android.app.Service} documentation for more details on a 1378 * service's lifecycle. 1379 * 1380 * <p>This function will throw {@link SecurityException} if you do not 1381 * have permission to stop the given service. 1382 * 1383 * @param service Description of the service to be stopped. The Intent may 1384 * specify either an explicit component name to start, or a logical 1385 * description (action, category, etc) to match an 1386 * {@link IntentFilter} published by a service. 1387 * 1388 * @return If there is a service matching the given Intent that is already 1389 * running, then it is stopped and true is returned; else false is returned. 1390 * 1391 * @throws SecurityException 1392 * 1393 * @see #startService 1394 */ 1395 public abstract boolean stopService(Intent service); 1396 1397 /** 1398 * Connect to an application service, creating it if needed. This defines 1399 * a dependency between your application and the service. The given 1400 * <var>conn</var> will receive the service object when it is created and be 1401 * told if it dies and restarts. The service will be considered required 1402 * by the system only for as long as the calling context exists. For 1403 * example, if this Context is an Activity that is stopped, the service will 1404 * not be required to continue running until the Activity is resumed. 1405 * 1406 * <p>This function will throw {@link SecurityException} if you do not 1407 * have permission to bind to the given service. 1408 * 1409 * <p class="note">Note: this method <em>can not be called from a 1410 * {@link BroadcastReceiver} component</em>. A pattern you can use to 1411 * communicate from a BroadcastReceiver to a Service is to call 1412 * {@link #startService} with the arguments containing the command to be 1413 * sent, with the service calling its 1414 * {@link android.app.Service#stopSelf(int)} method when done executing 1415 * that command. See the API demo App/Service/Service Start Arguments 1416 * Controller for an illustration of this. It is okay, however, to use 1417 * this method from a BroadcastReceiver that has been registered with 1418 * {@link #registerReceiver}, since the lifetime of this BroadcastReceiver 1419 * is tied to another object (the one that registered it).</p> 1420 * 1421 * @param service Identifies the service to connect to. The Intent may 1422 * specify either an explicit component name, or a logical 1423 * description (action, category, etc) to match an 1424 * {@link IntentFilter} published by a service. 1425 * @param conn Receives information as the service is started and stopped. 1426 * This must be a valid ServiceConnection object; it must not be null. 1427 * @param flags Operation options for the binding. May be 0, 1428 * {@link #BIND_AUTO_CREATE}, {@link #BIND_DEBUG_UNBIND}, 1429 * {@link #BIND_NOT_FOREGROUND}, {@link #BIND_ABOVE_CLIENT}, 1430 * {@link #BIND_ALLOW_OOM_MANAGEMENT}, or 1431 * {@link #BIND_WAIVE_PRIORITY}. 1432 * @return If you have successfully bound to the service, true is returned; 1433 * false is returned if the connection is not made so you will not 1434 * receive the service object. 1435 * 1436 * @throws SecurityException 1437 * 1438 * @see #unbindService 1439 * @see #startService 1440 * @see #BIND_AUTO_CREATE 1441 * @see #BIND_DEBUG_UNBIND 1442 * @see #BIND_NOT_FOREGROUND 1443 */ 1444 public abstract boolean bindService(Intent service, ServiceConnection conn, 1445 int flags); 1446 1447 /** 1448 * Same as {@link #bindService(Intent, ServiceConnection, int)}, but with an explicit userHandle 1449 * argument for use by system server and other multi-user aware code. 1450 * @hide 1451 */ 1452 public boolean bindService(Intent service, ServiceConnection conn, int flags, int userHandle) { 1453 throw new RuntimeException("Not implemented. Must override in a subclass."); 1454 } 1455 1456 /** 1457 * Disconnect from an application service. You will no longer receive 1458 * calls as the service is restarted, and the service is now allowed to 1459 * stop at any time. 1460 * 1461 * @param conn The connection interface previously supplied to 1462 * bindService(). This parameter must not be null. 1463 * 1464 * @see #bindService 1465 */ 1466 public abstract void unbindService(ServiceConnection conn); 1467 1468 /** 1469 * Start executing an {@link android.app.Instrumentation} class. The given 1470 * Instrumentation component will be run by killing its target application 1471 * (if currently running), starting the target process, instantiating the 1472 * instrumentation component, and then letting it drive the application. 1473 * 1474 * <p>This function is not synchronous -- it returns as soon as the 1475 * instrumentation has started and while it is running. 1476 * 1477 * <p>Instrumentation is normally only allowed to run against a package 1478 * that is either unsigned or signed with a signature that the 1479 * the instrumentation package is also signed with (ensuring the target 1480 * trusts the instrumentation). 1481 * 1482 * @param className Name of the Instrumentation component to be run. 1483 * @param profileFile Optional path to write profiling data as the 1484 * instrumentation runs, or null for no profiling. 1485 * @param arguments Additional optional arguments to pass to the 1486 * instrumentation, or null. 1487 * 1488 * @return Returns true if the instrumentation was successfully started, 1489 * else false if it could not be found. 1490 */ 1491 public abstract boolean startInstrumentation(ComponentName className, 1492 String profileFile, Bundle arguments); 1493 1494 /** 1495 * Return the handle to a system-level service by name. The class of the 1496 * returned object varies by the requested name. Currently available names 1497 * are: 1498 * 1499 * <dl> 1500 * <dt> {@link #WINDOW_SERVICE} ("window") 1501 * <dd> The top-level window manager in which you can place custom 1502 * windows. The returned object is a {@link android.view.WindowManager}. 1503 * <dt> {@link #LAYOUT_INFLATER_SERVICE} ("layout_inflater") 1504 * <dd> A {@link android.view.LayoutInflater} for inflating layout resources 1505 * in this context. 1506 * <dt> {@link #ACTIVITY_SERVICE} ("activity") 1507 * <dd> A {@link android.app.ActivityManager} for interacting with the 1508 * global activity state of the system. 1509 * <dt> {@link #POWER_SERVICE} ("power") 1510 * <dd> A {@link android.os.PowerManager} for controlling power 1511 * management. 1512 * <dt> {@link #ALARM_SERVICE} ("alarm") 1513 * <dd> A {@link android.app.AlarmManager} for receiving intents at the 1514 * time of your choosing. 1515 * <dt> {@link #NOTIFICATION_SERVICE} ("notification") 1516 * <dd> A {@link android.app.NotificationManager} for informing the user 1517 * of background events. 1518 * <dt> {@link #KEYGUARD_SERVICE} ("keyguard") 1519 * <dd> A {@link android.app.KeyguardManager} for controlling keyguard. 1520 * <dt> {@link #LOCATION_SERVICE} ("location") 1521 * <dd> A {@link android.location.LocationManager} for controlling location 1522 * (e.g., GPS) updates. 1523 * <dt> {@link #SEARCH_SERVICE} ("search") 1524 * <dd> A {@link android.app.SearchManager} for handling search. 1525 * <dt> {@link #VIBRATOR_SERVICE} ("vibrator") 1526 * <dd> A {@link android.os.Vibrator} for interacting with the vibrator 1527 * hardware. 1528 * <dt> {@link #CONNECTIVITY_SERVICE} ("connection") 1529 * <dd> A {@link android.net.ConnectivityManager ConnectivityManager} for 1530 * handling management of network connections. 1531 * <dt> {@link #WIFI_SERVICE} ("wifi") 1532 * <dd> A {@link android.net.wifi.WifiManager WifiManager} for management of 1533 * Wi-Fi connectivity. 1534 * <dt> {@link #INPUT_METHOD_SERVICE} ("input_method") 1535 * <dd> An {@link android.view.inputmethod.InputMethodManager InputMethodManager} 1536 * for management of input methods. 1537 * <dt> {@link #UI_MODE_SERVICE} ("uimode") 1538 * <dd> An {@link android.app.UiModeManager} for controlling UI modes. 1539 * <dt> {@link #DOWNLOAD_SERVICE} ("download") 1540 * <dd> A {@link android.app.DownloadManager} for requesting HTTP downloads 1541 * </dl> 1542 * 1543 * <p>Note: System services obtained via this API may be closely associated with 1544 * the Context in which they are obtained from. In general, do not share the 1545 * service objects between various different contexts (Activities, Applications, 1546 * Services, Providers, etc.) 1547 * 1548 * @param name The name of the desired service. 1549 * 1550 * @return The service or null if the name does not exist. 1551 * 1552 * @see #WINDOW_SERVICE 1553 * @see android.view.WindowManager 1554 * @see #LAYOUT_INFLATER_SERVICE 1555 * @see android.view.LayoutInflater 1556 * @see #ACTIVITY_SERVICE 1557 * @see android.app.ActivityManager 1558 * @see #POWER_SERVICE 1559 * @see android.os.PowerManager 1560 * @see #ALARM_SERVICE 1561 * @see android.app.AlarmManager 1562 * @see #NOTIFICATION_SERVICE 1563 * @see android.app.NotificationManager 1564 * @see #KEYGUARD_SERVICE 1565 * @see android.app.KeyguardManager 1566 * @see #LOCATION_SERVICE 1567 * @see android.location.LocationManager 1568 * @see #SEARCH_SERVICE 1569 * @see android.app.SearchManager 1570 * @see #SENSOR_SERVICE 1571 * @see android.hardware.SensorManager 1572 * @see #STORAGE_SERVICE 1573 * @see android.os.storage.StorageManager 1574 * @see #VIBRATOR_SERVICE 1575 * @see android.os.Vibrator 1576 * @see #CONNECTIVITY_SERVICE 1577 * @see android.net.ConnectivityManager 1578 * @see #WIFI_SERVICE 1579 * @see android.net.wifi.WifiManager 1580 * @see #AUDIO_SERVICE 1581 * @see android.media.AudioManager 1582 * @see #MEDIA_ROUTER_SERVICE 1583 * @see android.media.MediaRouter 1584 * @see #TELEPHONY_SERVICE 1585 * @see android.telephony.TelephonyManager 1586 * @see #INPUT_METHOD_SERVICE 1587 * @see android.view.inputmethod.InputMethodManager 1588 * @see #UI_MODE_SERVICE 1589 * @see android.app.UiModeManager 1590 * @see #DOWNLOAD_SERVICE 1591 * @see android.app.DownloadManager 1592 */ 1593 public abstract Object getSystemService(String name); 1594 1595 /** 1596 * Use with {@link #getSystemService} to retrieve a 1597 * {@link android.os.PowerManager} for controlling power management, 1598 * including "wake locks," which let you keep the device on while 1599 * you're running long tasks. 1600 */ 1601 public static final String POWER_SERVICE = "power"; 1602 1603 /** 1604 * Use with {@link #getSystemService} to retrieve a 1605 * {@link android.view.WindowManager} for accessing the system's window 1606 * manager. 1607 * 1608 * @see #getSystemService 1609 * @see android.view.WindowManager 1610 */ 1611 public static final String WINDOW_SERVICE = "window"; 1612 1613 /** 1614 * Use with {@link #getSystemService} to retrieve a 1615 * {@link android.view.LayoutInflater} for inflating layout resources in this 1616 * context. 1617 * 1618 * @see #getSystemService 1619 * @see android.view.LayoutInflater 1620 */ 1621 public static final String LAYOUT_INFLATER_SERVICE = "layout_inflater"; 1622 1623 /** 1624 * Use with {@link #getSystemService} to retrieve a 1625 * {@link android.accounts.AccountManager} for receiving intents at a 1626 * time of your choosing. 1627 * 1628 * @see #getSystemService 1629 * @see android.accounts.AccountManager 1630 */ 1631 public static final String ACCOUNT_SERVICE = "account"; 1632 1633 /** 1634 * Use with {@link #getSystemService} to retrieve a 1635 * {@link android.app.ActivityManager} for interacting with the global 1636 * system state. 1637 * 1638 * @see #getSystemService 1639 * @see android.app.ActivityManager 1640 */ 1641 public static final String ACTIVITY_SERVICE = "activity"; 1642 1643 /** 1644 * Use with {@link #getSystemService} to retrieve a 1645 * {@link android.app.AlarmManager} for receiving intents at a 1646 * time of your choosing. 1647 * 1648 * @see #getSystemService 1649 * @see android.app.AlarmManager 1650 */ 1651 public static final String ALARM_SERVICE = "alarm"; 1652 1653 /** 1654 * Use with {@link #getSystemService} to retrieve a 1655 * {@link android.app.NotificationManager} for informing the user of 1656 * background events. 1657 * 1658 * @see #getSystemService 1659 * @see android.app.NotificationManager 1660 */ 1661 public static final String NOTIFICATION_SERVICE = "notification"; 1662 1663 /** 1664 * Use with {@link #getSystemService} to retrieve a 1665 * {@link android.view.accessibility.AccessibilityManager} for giving the user 1666 * feedback for UI events through the registered event listeners. 1667 * 1668 * @see #getSystemService 1669 * @see android.view.accessibility.AccessibilityManager 1670 */ 1671 public static final String ACCESSIBILITY_SERVICE = "accessibility"; 1672 1673 /** 1674 * Use with {@link #getSystemService} to retrieve a 1675 * {@link android.app.NotificationManager} for controlling keyguard. 1676 * 1677 * @see #getSystemService 1678 * @see android.app.KeyguardManager 1679 */ 1680 public static final String KEYGUARD_SERVICE = "keyguard"; 1681 1682 /** 1683 * Use with {@link #getSystemService} to retrieve a {@link 1684 * android.location.LocationManager} for controlling location 1685 * updates. 1686 * 1687 * @see #getSystemService 1688 * @see android.location.LocationManager 1689 */ 1690 public static final String LOCATION_SERVICE = "location"; 1691 1692 /** 1693 * Use with {@link #getSystemService} to retrieve a 1694 * {@link android.location.CountryDetector} for detecting the country that 1695 * the user is in. 1696 * 1697 * @hide 1698 */ 1699 public static final String COUNTRY_DETECTOR = "country_detector"; 1700 1701 /** 1702 * Use with {@link #getSystemService} to retrieve a {@link 1703 * android.app.SearchManager} for handling searches. 1704 * 1705 * @see #getSystemService 1706 * @see android.app.SearchManager 1707 */ 1708 public static final String SEARCH_SERVICE = "search"; 1709 1710 /** 1711 * Use with {@link #getSystemService} to retrieve a {@link 1712 * android.hardware.SensorManager} for accessing sensors. 1713 * 1714 * @see #getSystemService 1715 * @see android.hardware.SensorManager 1716 */ 1717 public static final String SENSOR_SERVICE = "sensor"; 1718 1719 /** 1720 * Use with {@link #getSystemService} to retrieve a {@link 1721 * android.os.storage.StorageManager} for accessing system storage 1722 * functions. 1723 * 1724 * @see #getSystemService 1725 * @see android.os.storage.StorageManager 1726 */ 1727 public static final String STORAGE_SERVICE = "storage"; 1728 1729 /** 1730 * Use with {@link #getSystemService} to retrieve a 1731 * com.android.server.WallpaperService for accessing wallpapers. 1732 * 1733 * @see #getSystemService 1734 */ 1735 public static final String WALLPAPER_SERVICE = "wallpaper"; 1736 1737 /** 1738 * Use with {@link #getSystemService} to retrieve a {@link 1739 * android.os.Vibrator} for interacting with the vibration hardware. 1740 * 1741 * @see #getSystemService 1742 * @see android.os.Vibrator 1743 */ 1744 public static final String VIBRATOR_SERVICE = "vibrator"; 1745 1746 /** 1747 * Use with {@link #getSystemService} to retrieve a {@link 1748 * android.app.StatusBarManager} for interacting with the status bar. 1749 * 1750 * @see #getSystemService 1751 * @see android.app.StatusBarManager 1752 * @hide 1753 */ 1754 public static final String STATUS_BAR_SERVICE = "statusbar"; 1755 1756 /** 1757 * Use with {@link #getSystemService} to retrieve a {@link 1758 * android.net.ConnectivityManager} for handling management of 1759 * network connections. 1760 * 1761 * @see #getSystemService 1762 * @see android.net.ConnectivityManager 1763 */ 1764 public static final String CONNECTIVITY_SERVICE = "connectivity"; 1765 1766 /** 1767 * Use with {@link #getSystemService} to retrieve a {@link 1768 * android.net.ThrottleManager} for handling management of 1769 * throttling. 1770 * 1771 * @hide 1772 * @see #getSystemService 1773 * @see android.net.ThrottleManager 1774 */ 1775 public static final String THROTTLE_SERVICE = "throttle"; 1776 1777 /** 1778 * Use with {@link #getSystemService} to retrieve a {@link 1779 * android.os.IUpdateLock} for managing runtime sequences that 1780 * must not be interrupted by headless OTA application or similar. 1781 * 1782 * @hide 1783 * @see #getSystemService 1784 * @see android.os.UpdateLock 1785 */ 1786 public static final String UPDATE_LOCK_SERVICE = "updatelock"; 1787 1788 /** 1789 * Use with {@link #getSystemService} to retrieve a {@link 1790 * android.net.NetworkManagementService} for handling management of 1791 * system network services 1792 * 1793 * @hide 1794 * @see #getSystemService 1795 * @see android.net.NetworkManagementService 1796 */ 1797 public static final String NETWORKMANAGEMENT_SERVICE = "network_management"; 1798 1799 /** {@hide} */ 1800 public static final String NETWORK_STATS_SERVICE = "netstats"; 1801 /** {@hide} */ 1802 public static final String NETWORK_POLICY_SERVICE = "netpolicy"; 1803 1804 /** 1805 * Use with {@link #getSystemService} to retrieve a {@link 1806 * android.net.wifi.WifiManager} for handling management of 1807 * Wi-Fi access. 1808 * 1809 * @see #getSystemService 1810 * @see android.net.wifi.WifiManager 1811 */ 1812 public static final String WIFI_SERVICE = "wifi"; 1813 1814 /** 1815 * Use with {@link #getSystemService} to retrieve a {@link 1816 * android.net.wifi.p2p.WifiP2pManager} for handling management of 1817 * Wi-Fi peer-to-peer connections. 1818 * 1819 * @see #getSystemService 1820 * @see android.net.wifi.p2p.WifiP2pManager 1821 */ 1822 public static final String WIFI_P2P_SERVICE = "wifip2p"; 1823 1824 /** 1825 * Use with {@link #getSystemService} to retrieve a {@link 1826 * android.net.nsd.NsdManager} for handling management of network service 1827 * discovery 1828 * 1829 * @see #getSystemService 1830 * @see android.net.nsd.NsdManager 1831 */ 1832 public static final String NSD_SERVICE = "servicediscovery"; 1833 1834 /** 1835 * Use with {@link #getSystemService} to retrieve a 1836 * {@link android.media.AudioManager} for handling management of volume, 1837 * ringer modes and audio routing. 1838 * 1839 * @see #getSystemService 1840 * @see android.media.AudioManager 1841 */ 1842 public static final String AUDIO_SERVICE = "audio"; 1843 1844 /** 1845 * Use with {@link #getSystemService} to retrieve a 1846 * {@link android.media.MediaRouter} for controlling and managing 1847 * routing of media. 1848 * 1849 * @see #getSystemService 1850 * @see android.media.MediaRouter 1851 */ 1852 public static final String MEDIA_ROUTER_SERVICE = "media_router"; 1853 1854 /** 1855 * Use with {@link #getSystemService} to retrieve a 1856 * {@link android.telephony.TelephonyManager} for handling management the 1857 * telephony features of the device. 1858 * 1859 * @see #getSystemService 1860 * @see android.telephony.TelephonyManager 1861 */ 1862 public static final String TELEPHONY_SERVICE = "phone"; 1863 1864 /** 1865 * Use with {@link #getSystemService} to retrieve a 1866 * {@link android.text.ClipboardManager} for accessing and modifying 1867 * the contents of the global clipboard. 1868 * 1869 * @see #getSystemService 1870 * @see android.text.ClipboardManager 1871 */ 1872 public static final String CLIPBOARD_SERVICE = "clipboard"; 1873 1874 /** 1875 * Use with {@link #getSystemService} to retrieve a 1876 * {@link android.view.inputmethod.InputMethodManager} for accessing input 1877 * methods. 1878 * 1879 * @see #getSystemService 1880 */ 1881 public static final String INPUT_METHOD_SERVICE = "input_method"; 1882 1883 /** 1884 * Use with {@link #getSystemService} to retrieve a 1885 * {@link android.view.textservice.TextServicesManager} for accessing 1886 * text services. 1887 * 1888 * @see #getSystemService 1889 */ 1890 public static final String TEXT_SERVICES_MANAGER_SERVICE = "textservices"; 1891 1892 /** 1893 * Use with {@link #getSystemService} to retrieve a 1894 * {@link android.appwidget.AppWidgetManager} for accessing AppWidgets. 1895 * 1896 * @hide 1897 * @see #getSystemService 1898 */ 1899 public static final String APPWIDGET_SERVICE = "appwidget"; 1900 1901 /** 1902 * Use with {@link #getSystemService} to retrieve an 1903 * {@link android.app.backup.IBackupManager IBackupManager} for communicating 1904 * with the backup mechanism. 1905 * @hide 1906 * 1907 * @see #getSystemService 1908 */ 1909 public static final String BACKUP_SERVICE = "backup"; 1910 1911 /** 1912 * Use with {@link #getSystemService} to retrieve a 1913 * {@link android.os.DropBoxManager} instance for recording 1914 * diagnostic logs. 1915 * @see #getSystemService 1916 */ 1917 public static final String DROPBOX_SERVICE = "dropbox"; 1918 1919 /** 1920 * Use with {@link #getSystemService} to retrieve a 1921 * {@link android.app.admin.DevicePolicyManager} for working with global 1922 * device policy management. 1923 * 1924 * @see #getSystemService 1925 */ 1926 public static final String DEVICE_POLICY_SERVICE = "device_policy"; 1927 1928 /** 1929 * Use with {@link #getSystemService} to retrieve a 1930 * {@link android.app.UiModeManager} for controlling UI modes. 1931 * 1932 * @see #getSystemService 1933 */ 1934 public static final String UI_MODE_SERVICE = "uimode"; 1935 1936 /** 1937 * Use with {@link #getSystemService} to retrieve a 1938 * {@link android.app.DownloadManager} for requesting HTTP downloads. 1939 * 1940 * @see #getSystemService 1941 */ 1942 public static final String DOWNLOAD_SERVICE = "download"; 1943 1944 /** 1945 * Use with {@link #getSystemService} to retrieve a 1946 * {@link android.nfc.NfcManager} for using NFC. 1947 * 1948 * @see #getSystemService 1949 */ 1950 public static final String NFC_SERVICE = "nfc"; 1951 1952 /** 1953 * Use with {@link #getSystemService} to retrieve a 1954 * {@link android.bluetooth.BluetoothAdapter} for using Bluetooth. 1955 * 1956 * @see #getSystemService 1957 * @hide 1958 */ 1959 public static final String BLUETOOTH_SERVICE = "bluetooth"; 1960 1961 /** 1962 * Use with {@link #getSystemService} to retrieve a 1963 * {@link android.net.sip.SipManager} for accessing the SIP related service. 1964 * 1965 * @see #getSystemService 1966 */ 1967 /** @hide */ 1968 public static final String SIP_SERVICE = "sip"; 1969 1970 /** 1971 * Use with {@link #getSystemService} to retrieve a {@link 1972 * android.hardware.usb.UsbManager} for access to USB devices (as a USB host) 1973 * and for controlling this device's behavior as a USB device. 1974 * 1975 * @see #getSystemService 1976 * @see android.harware.usb.UsbManager 1977 */ 1978 public static final String USB_SERVICE = "usb"; 1979 1980 /** 1981 * Use with {@link #getSystemService} to retrieve a {@link 1982 * android.hardware.SerialManager} for access to serial ports. 1983 * 1984 * @see #getSystemService 1985 * @see android.harware.SerialManager 1986 * 1987 * @hide 1988 */ 1989 public static final String SERIAL_SERVICE = "serial"; 1990 1991 /** 1992 * Use with {@link #getSystemService} to retrieve a 1993 * {@link android.hardware.input.InputManager} for interacting with input devices. 1994 * 1995 * @see #getSystemService 1996 * @see android.hardware.input.InputManager 1997 */ 1998 public static final String INPUT_SERVICE = "input"; 1999 2000 /** 2001 * Use with {@link #getSystemService} to retrieve a 2002 * {@link android.hardware.display.DisplayManager} for interacting with display devices. 2003 * 2004 * @see #getSystemService 2005 * @see android.hardware.display.DisplayManager 2006 */ 2007 public static final String DISPLAY_SERVICE = "display"; 2008 2009 /** 2010 * Use with {@link #getSystemService} to retrieve a 2011 * {@link android.os.SchedulingPolicyService} for managing scheduling policy. 2012 * 2013 * @see #getSystemService 2014 * @see android.os.SchedulingPolicyService 2015 * 2016 * @hide 2017 */ 2018 public static final String SCHEDULING_POLICY_SERVICE = "scheduling_policy"; 2019 2020 /** 2021 * Determine whether the given permission is allowed for a particular 2022 * process and user ID running in the system. 2023 * 2024 * @param permission The name of the permission being checked. 2025 * @param pid The process ID being checked against. Must be > 0. 2026 * @param uid The user ID being checked against. A uid of 0 is the root 2027 * user, which will pass every permission check. 2028 * 2029 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the given 2030 * pid/uid is allowed that permission, or 2031 * {@link PackageManager#PERMISSION_DENIED} if it is not. 2032 * 2033 * @see PackageManager#checkPermission(String, String) 2034 * @see #checkCallingPermission 2035 */ 2036 public abstract int checkPermission(String permission, int pid, int uid); 2037 2038 /** 2039 * Determine whether the calling process of an IPC you are handling has been 2040 * granted a particular permission. This is basically the same as calling 2041 * {@link #checkPermission(String, int, int)} with the pid and uid returned 2042 * by {@link android.os.Binder#getCallingPid} and 2043 * {@link android.os.Binder#getCallingUid}. One important difference 2044 * is that if you are not currently processing an IPC, this function 2045 * will always fail. This is done to protect against accidentally 2046 * leaking permissions; you can use {@link #checkCallingOrSelfPermission} 2047 * to avoid this protection. 2048 * 2049 * @param permission The name of the permission being checked. 2050 * 2051 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the calling 2052 * pid/uid is allowed that permission, or 2053 * {@link PackageManager#PERMISSION_DENIED} if it is not. 2054 * 2055 * @see PackageManager#checkPermission(String, String) 2056 * @see #checkPermission 2057 * @see #checkCallingOrSelfPermission 2058 */ 2059 public abstract int checkCallingPermission(String permission); 2060 2061 /** 2062 * Determine whether the calling process of an IPC <em>or you</em> have been 2063 * granted a particular permission. This is the same as 2064 * {@link #checkCallingPermission}, except it grants your own permissions 2065 * if you are not currently processing an IPC. Use with care! 2066 * 2067 * @param permission The name of the permission being checked. 2068 * 2069 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the calling 2070 * pid/uid is allowed that permission, or 2071 * {@link PackageManager#PERMISSION_DENIED} if it is not. 2072 * 2073 * @see PackageManager#checkPermission(String, String) 2074 * @see #checkPermission 2075 * @see #checkCallingPermission 2076 */ 2077 public abstract int checkCallingOrSelfPermission(String permission); 2078 2079 /** 2080 * If the given permission is not allowed for a particular process 2081 * and user ID running in the system, throw a {@link SecurityException}. 2082 * 2083 * @param permission The name of the permission being checked. 2084 * @param pid The process ID being checked against. Must be > 0. 2085 * @param uid The user ID being checked against. A uid of 0 is the root 2086 * user, which will pass every permission check. 2087 * @param message A message to include in the exception if it is thrown. 2088 * 2089 * @see #checkPermission(String, int, int) 2090 */ 2091 public abstract void enforcePermission( 2092 String permission, int pid, int uid, String message); 2093 2094 /** 2095 * If the calling process of an IPC you are handling has not been 2096 * granted a particular permission, throw a {@link 2097 * SecurityException}. This is basically the same as calling 2098 * {@link #enforcePermission(String, int, int, String)} with the 2099 * pid and uid returned by {@link android.os.Binder#getCallingPid} 2100 * and {@link android.os.Binder#getCallingUid}. One important 2101 * difference is that if you are not currently processing an IPC, 2102 * this function will always throw the SecurityException. This is 2103 * done to protect against accidentally leaking permissions; you 2104 * can use {@link #enforceCallingOrSelfPermission} to avoid this 2105 * protection. 2106 * 2107 * @param permission The name of the permission being checked. 2108 * @param message A message to include in the exception if it is thrown. 2109 * 2110 * @see #checkCallingPermission(String) 2111 */ 2112 public abstract void enforceCallingPermission( 2113 String permission, String message); 2114 2115 /** 2116 * If neither you nor the calling process of an IPC you are 2117 * handling has been granted a particular permission, throw a 2118 * {@link SecurityException}. This is the same as {@link 2119 * #enforceCallingPermission}, except it grants your own 2120 * permissions if you are not currently processing an IPC. Use 2121 * with care! 2122 * 2123 * @param permission The name of the permission being checked. 2124 * @param message A message to include in the exception if it is thrown. 2125 * 2126 * @see #checkCallingOrSelfPermission(String) 2127 */ 2128 public abstract void enforceCallingOrSelfPermission( 2129 String permission, String message); 2130 2131 /** 2132 * Grant permission to access a specific Uri to another package, regardless 2133 * of whether that package has general permission to access the Uri's 2134 * content provider. This can be used to grant specific, temporary 2135 * permissions, typically in response to user interaction (such as the 2136 * user opening an attachment that you would like someone else to 2137 * display). 2138 * 2139 * <p>Normally you should use {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 2140 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2141 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 2142 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} with the Intent being used to 2143 * start an activity instead of this function directly. If you use this 2144 * function directly, you should be sure to call 2145 * {@link #revokeUriPermission} when the target should no longer be allowed 2146 * to access it. 2147 * 2148 * <p>To succeed, the content provider owning the Uri must have set the 2149 * {@link android.R.styleable#AndroidManifestProvider_grantUriPermissions 2150 * grantUriPermissions} attribute in its manifest or included the 2151 * {@link android.R.styleable#AndroidManifestGrantUriPermission 2152 * <grant-uri-permissions>} tag. 2153 * 2154 * @param toPackage The package you would like to allow to access the Uri. 2155 * @param uri The Uri you would like to grant access to. 2156 * @param modeFlags The desired access modes. Any combination of 2157 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 2158 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2159 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 2160 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 2161 * 2162 * @see #revokeUriPermission 2163 */ 2164 public abstract void grantUriPermission(String toPackage, Uri uri, 2165 int modeFlags); 2166 2167 /** 2168 * Remove all permissions to access a particular content provider Uri 2169 * that were previously added with {@link #grantUriPermission}. The given 2170 * Uri will match all previously granted Uris that are the same or a 2171 * sub-path of the given Uri. That is, revoking "content://foo/one" will 2172 * revoke both "content://foo/target" and "content://foo/target/sub", but not 2173 * "content://foo". 2174 * 2175 * @param uri The Uri you would like to revoke access to. 2176 * @param modeFlags The desired access modes. Any combination of 2177 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 2178 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2179 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 2180 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 2181 * 2182 * @see #grantUriPermission 2183 */ 2184 public abstract void revokeUriPermission(Uri uri, int modeFlags); 2185 2186 /** 2187 * Determine whether a particular process and user ID has been granted 2188 * permission to access a specific URI. This only checks for permissions 2189 * that have been explicitly granted -- if the given process/uid has 2190 * more general access to the URI's content provider then this check will 2191 * always fail. 2192 * 2193 * @param uri The uri that is being checked. 2194 * @param pid The process ID being checked against. Must be > 0. 2195 * @param uid The user ID being checked against. A uid of 0 is the root 2196 * user, which will pass every permission check. 2197 * @param modeFlags The type of access to grant. May be one or both of 2198 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2199 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 2200 * 2201 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the given 2202 * pid/uid is allowed to access that uri, or 2203 * {@link PackageManager#PERMISSION_DENIED} if it is not. 2204 * 2205 * @see #checkCallingUriPermission 2206 */ 2207 public abstract int checkUriPermission(Uri uri, int pid, int uid, int modeFlags); 2208 2209 /** 2210 * Determine whether the calling process and user ID has been 2211 * granted permission to access a specific URI. This is basically 2212 * the same as calling {@link #checkUriPermission(Uri, int, int, 2213 * int)} with the pid and uid returned by {@link 2214 * android.os.Binder#getCallingPid} and {@link 2215 * android.os.Binder#getCallingUid}. One important difference is 2216 * that if you are not currently processing an IPC, this function 2217 * will always fail. 2218 * 2219 * @param uri The uri that is being checked. 2220 * @param modeFlags The type of access to grant. May be one or both of 2221 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2222 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 2223 * 2224 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 2225 * is allowed to access that uri, or 2226 * {@link PackageManager#PERMISSION_DENIED} if it is not. 2227 * 2228 * @see #checkUriPermission(Uri, int, int, int) 2229 */ 2230 public abstract int checkCallingUriPermission(Uri uri, int modeFlags); 2231 2232 /** 2233 * Determine whether the calling process of an IPC <em>or you</em> has been granted 2234 * permission to access a specific URI. This is the same as 2235 * {@link #checkCallingUriPermission}, except it grants your own permissions 2236 * if you are not currently processing an IPC. Use with care! 2237 * 2238 * @param uri The uri that is being checked. 2239 * @param modeFlags The type of access to grant. May be one or both of 2240 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2241 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 2242 * 2243 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 2244 * is allowed to access that uri, or 2245 * {@link PackageManager#PERMISSION_DENIED} if it is not. 2246 * 2247 * @see #checkCallingUriPermission 2248 */ 2249 public abstract int checkCallingOrSelfUriPermission(Uri uri, int modeFlags); 2250 2251 /** 2252 * Check both a Uri and normal permission. This allows you to perform 2253 * both {@link #checkPermission} and {@link #checkUriPermission} in one 2254 * call. 2255 * 2256 * @param uri The Uri whose permission is to be checked, or null to not 2257 * do this check. 2258 * @param readPermission The permission that provides overall read access, 2259 * or null to not do this check. 2260 * @param writePermission The permission that provides overall write 2261 * acess, or null to not do this check. 2262 * @param pid The process ID being checked against. Must be > 0. 2263 * @param uid The user ID being checked against. A uid of 0 is the root 2264 * user, which will pass every permission check. 2265 * @param modeFlags The type of access to grant. May be one or both of 2266 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2267 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 2268 * 2269 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 2270 * is allowed to access that uri or holds one of the given permissions, or 2271 * {@link PackageManager#PERMISSION_DENIED} if it is not. 2272 */ 2273 public abstract int checkUriPermission(Uri uri, String readPermission, 2274 String writePermission, int pid, int uid, int modeFlags); 2275 2276 /** 2277 * If a particular process and user ID has not been granted 2278 * permission to access a specific URI, throw {@link 2279 * SecurityException}. This only checks for permissions that have 2280 * been explicitly granted -- if the given process/uid has more 2281 * general access to the URI's content provider then this check 2282 * will always fail. 2283 * 2284 * @param uri The uri that is being checked. 2285 * @param pid The process ID being checked against. Must be > 0. 2286 * @param uid The user ID being checked against. A uid of 0 is the root 2287 * user, which will pass every permission check. 2288 * @param modeFlags The type of access to grant. May be one or both of 2289 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2290 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 2291 * @param message A message to include in the exception if it is thrown. 2292 * 2293 * @see #checkUriPermission(Uri, int, int, int) 2294 */ 2295 public abstract void enforceUriPermission( 2296 Uri uri, int pid, int uid, int modeFlags, String message); 2297 2298 /** 2299 * If the calling process and user ID has not been granted 2300 * permission to access a specific URI, throw {@link 2301 * SecurityException}. This is basically the same as calling 2302 * {@link #enforceUriPermission(Uri, int, int, int, String)} with 2303 * the pid and uid returned by {@link 2304 * android.os.Binder#getCallingPid} and {@link 2305 * android.os.Binder#getCallingUid}. One important difference is 2306 * that if you are not currently processing an IPC, this function 2307 * will always throw a SecurityException. 2308 * 2309 * @param uri The uri that is being checked. 2310 * @param modeFlags The type of access to grant. May be one or both of 2311 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2312 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 2313 * @param message A message to include in the exception if it is thrown. 2314 * 2315 * @see #checkCallingUriPermission(Uri, int) 2316 */ 2317 public abstract void enforceCallingUriPermission( 2318 Uri uri, int modeFlags, String message); 2319 2320 /** 2321 * If the calling process of an IPC <em>or you</em> has not been 2322 * granted permission to access a specific URI, throw {@link 2323 * SecurityException}. This is the same as {@link 2324 * #enforceCallingUriPermission}, except it grants your own 2325 * permissions if you are not currently processing an IPC. Use 2326 * with care! 2327 * 2328 * @param uri The uri that is being checked. 2329 * @param modeFlags The type of access to grant. May be one or both of 2330 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2331 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 2332 * @param message A message to include in the exception if it is thrown. 2333 * 2334 * @see #checkCallingOrSelfUriPermission(Uri, int) 2335 */ 2336 public abstract void enforceCallingOrSelfUriPermission( 2337 Uri uri, int modeFlags, String message); 2338 2339 /** 2340 * Enforce both a Uri and normal permission. This allows you to perform 2341 * both {@link #enforcePermission} and {@link #enforceUriPermission} in one 2342 * call. 2343 * 2344 * @param uri The Uri whose permission is to be checked, or null to not 2345 * do this check. 2346 * @param readPermission The permission that provides overall read access, 2347 * or null to not do this check. 2348 * @param writePermission The permission that provides overall write 2349 * acess, or null to not do this check. 2350 * @param pid The process ID being checked against. Must be > 0. 2351 * @param uid The user ID being checked against. A uid of 0 is the root 2352 * user, which will pass every permission check. 2353 * @param modeFlags The type of access to grant. May be one or both of 2354 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 2355 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 2356 * @param message A message to include in the exception if it is thrown. 2357 * 2358 * @see #checkUriPermission(Uri, String, String, int, int, int) 2359 */ 2360 public abstract void enforceUriPermission( 2361 Uri uri, String readPermission, String writePermission, 2362 int pid, int uid, int modeFlags, String message); 2363 2364 /** 2365 * Flag for use with {@link #createPackageContext}: include the application 2366 * code with the context. This means loading code into the caller's 2367 * process, so that {@link #getClassLoader()} can be used to instantiate 2368 * the application's classes. Setting this flags imposes security 2369 * restrictions on what application context you can access; if the 2370 * requested application can not be safely loaded into your process, 2371 * java.lang.SecurityException will be thrown. If this flag is not set, 2372 * there will be no restrictions on the packages that can be loaded, 2373 * but {@link #getClassLoader} will always return the default system 2374 * class loader. 2375 */ 2376 public static final int CONTEXT_INCLUDE_CODE = 0x00000001; 2377 2378 /** 2379 * Flag for use with {@link #createPackageContext}: ignore any security 2380 * restrictions on the Context being requested, allowing it to always 2381 * be loaded. For use with {@link #CONTEXT_INCLUDE_CODE} to allow code 2382 * to be loaded into a process even when it isn't safe to do so. Use 2383 * with extreme care! 2384 */ 2385 public static final int CONTEXT_IGNORE_SECURITY = 0x00000002; 2386 2387 /** 2388 * Flag for use with {@link #createPackageContext}: a restricted context may 2389 * disable specific features. For instance, a View associated with a restricted 2390 * context would ignore particular XML attributes. 2391 */ 2392 public static final int CONTEXT_RESTRICTED = 0x00000004; 2393 2394 /** 2395 * Return a new Context object for the given application name. This 2396 * Context is the same as what the named application gets when it is 2397 * launched, containing the same resources and class loader. Each call to 2398 * this method returns a new instance of a Context object; Context objects 2399 * are not shared, however they share common state (Resources, ClassLoader, 2400 * etc) so the Context instance itself is fairly lightweight. 2401 * 2402 * <p>Throws {@link PackageManager.NameNotFoundException} if there is no 2403 * application with the given package name. 2404 * 2405 * <p>Throws {@link java.lang.SecurityException} if the Context requested 2406 * can not be loaded into the caller's process for security reasons (see 2407 * {@link #CONTEXT_INCLUDE_CODE} for more information}. 2408 * 2409 * @param packageName Name of the application's package. 2410 * @param flags Option flags, one of {@link #CONTEXT_INCLUDE_CODE} 2411 * or {@link #CONTEXT_IGNORE_SECURITY}. 2412 * 2413 * @return A Context for the application. 2414 * 2415 * @throws java.lang.SecurityException 2416 * @throws PackageManager.NameNotFoundException if there is no application with 2417 * the given package name 2418 */ 2419 public abstract Context createPackageContext(String packageName, 2420 int flags) throws PackageManager.NameNotFoundException; 2421 2422 /** 2423 * Indicates whether this Context is restricted. 2424 * 2425 * @return True if this Context is restricted, false otherwise. 2426 * 2427 * @see #CONTEXT_RESTRICTED 2428 */ 2429 public boolean isRestricted() { 2430 return false; 2431 } 2432} 2433