Context.java revision e83cefcef07f9ac025642c1ffec76b4c7ab39cf2
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.sqlite.SQLiteDatabase; 25import android.database.sqlite.SQLiteDatabase.CursorFactory; 26import android.graphics.Bitmap; 27import android.graphics.drawable.Drawable; 28import android.media.MediaScannerConnection.ScanResultListener; 29import android.net.Uri; 30import android.os.Bundle; 31import android.os.Handler; 32import android.os.Looper; 33import android.util.AttributeSet; 34 35import java.io.File; 36import java.io.FileInputStream; 37import java.io.FileNotFoundException; 38import java.io.FileOutputStream; 39import java.io.IOException; 40import java.io.InputStream; 41 42/** 43 * Interface to global information about an application environment. This is 44 * an abstract class whose implementation is provided by 45 * the Android system. It 46 * allows access to application-specific resources and classes, as well as 47 * up-calls for application-level operations such as launching activities, 48 * broadcasting and receiving intents, etc. 49 */ 50public abstract class Context { 51 /** 52 * File creation mode: the default mode, where the created file can only 53 * be accessed by the calling application (or all applications sharing the 54 * same user ID). 55 * @see #MODE_WORLD_READABLE 56 * @see #MODE_WORLD_WRITEABLE 57 */ 58 public static final int MODE_PRIVATE = 0x0000; 59 /** 60 * File creation mode: allow all other applications to have read access 61 * to the created file. 62 * @see #MODE_PRIVATE 63 * @see #MODE_WORLD_WRITEABLE 64 */ 65 public static final int MODE_WORLD_READABLE = 0x0001; 66 /** 67 * File creation mode: allow all other applications to have write access 68 * to the created file. 69 * @see #MODE_PRIVATE 70 * @see #MODE_WORLD_READABLE 71 */ 72 public static final int MODE_WORLD_WRITEABLE = 0x0002; 73 /** 74 * File creation mode: for use with {@link #openFileOutput}, if the file 75 * already exists then write data to the end of the existing file 76 * instead of erasing it. 77 * @see #openFileOutput 78 */ 79 public static final int MODE_APPEND = 0x8000; 80 81 /** 82 * Flag for {@link #bindService}: automatically create the service as long 83 * as the binding exists. Note that while this will create the service, 84 * its {@link android.app.Service#onStart} method will still only be called due to an 85 * explicit call to {@link #startService}. Even without that, though, 86 * this still provides you with access to the service object while the 87 * service is created. 88 * 89 * <p>Specifying this flag also tells the system to treat the service 90 * as being as important as your own process -- that is, when deciding 91 * which process should be killed to free memory, the service will only 92 * be considered a candidate as long as the processes of any such bindings 93 * is also a candidate to be killed. This is to avoid situations where 94 * the service is being continually created and killed due to low memory. 95 */ 96 public static final int BIND_AUTO_CREATE = 0x0001; 97 98 /** 99 * Flag for {@link #bindService}: include debugging help for mismatched 100 * calls to unbind. When this flag is set, the callstack of the following 101 * {@link #unbindService} call is retained, to be printed if a later 102 * incorrect unbind call is made. Note that doing this requires retaining 103 * information about the binding that was made for the lifetime of the app, 104 * resulting in a leak -- this should only be used for debugging. 105 */ 106 public static final int BIND_DEBUG_UNBIND = 0x0002; 107 108 /** 109 * Flag for {@link #bindService}: don't allow this binding to raise 110 * the target service's process to the foreground scheduling priority. 111 * It will still be raised to the at least the same memory priority 112 * as the client (so that its process will not be killable in any 113 * situation where the client is not killable), but for CPU scheduling 114 * purposes it may be left in the background. This only has an impact 115 * in the situation where the binding client is a foreground process 116 * and the target service is in a background process. 117 */ 118 public static final int BIND_NOT_FOREGROUND = 0x0004; 119 120 /** Return an AssetManager instance for your application's package. */ 121 public abstract AssetManager getAssets(); 122 123 /** Return a Resources instance for your application's package. */ 124 public abstract Resources getResources(); 125 126 /** Return PackageManager instance to find global package information. */ 127 public abstract PackageManager getPackageManager(); 128 129 /** Return a ContentResolver instance for your application's package. */ 130 public abstract ContentResolver getContentResolver(); 131 132 /** 133 * Return the Looper for the main thread of the current process. This is 134 * the thread used to dispatch calls to application components (activities, 135 * services, etc). 136 */ 137 public abstract Looper getMainLooper(); 138 139 /** 140 * Return the context of the single, global Application object of the 141 * current process. This generally should only be used if you need a 142 * Context whose lifecycle is separate from the current context, that is 143 * tied to the lifetime of the process rather than the current component. 144 * 145 * <p>Consider for example how this interacts with 146 * {@ #registerReceiver(BroadcastReceiver, IntentFilter)}: 147 * <ul> 148 * <li> <p>If used from an Activity context, the receiver is being registered 149 * within that activity. This means that you are expected to unregister 150 * before the activity is done being destroyed; in fact if you do not do 151 * so, the framework will clean up your leaked registration as it removes 152 * the activity and log an error. Thus, if you use the Activity context 153 * to register a receiver that is static (global to the process, not 154 * associated with an Activity instance) then that registration will be 155 * removed on you at whatever point the activity you used is destroyed. 156 * <li> <p>If used from the Context returned here, the receiver is being 157 * registered with the global state associated with your application. Thus 158 * it will never be unregistered for you. This is necessary if the receiver 159 * is associated with static data, not a particular component. However 160 * using the ApplicationContext elsewhere can easily lead to serious leaks 161 * if you forget to unregister, unbind, etc. 162 * </ul> 163 */ 164 public abstract Context getApplicationContext(); 165 166 /** 167 * Return a localized, styled CharSequence from the application's package's 168 * default string table. 169 * 170 * @param resId Resource id for the CharSequence text 171 */ 172 public final CharSequence getText(int resId) { 173 return getResources().getText(resId); 174 } 175 176 /** 177 * Return a localized string from the application's package's 178 * default string table. 179 * 180 * @param resId Resource id for the string 181 */ 182 public final String getString(int resId) { 183 return getResources().getString(resId); 184 } 185 186 /** 187 * Return a localized formatted string from the application's package's 188 * default string table, substituting the format arguments as defined in 189 * {@link java.util.Formatter} and {@link java.lang.String#format}. 190 * 191 * @param resId Resource id for the format string 192 * @param formatArgs The format arguments that will be used for substitution. 193 */ 194 195 public final String getString(int resId, Object... formatArgs) { 196 return getResources().getString(resId, formatArgs); 197 } 198 199 /** 200 * Set the base theme for this context. Note that this should be called 201 * before any views are instantiated in the Context (for example before 202 * calling {@link android.app.Activity#setContentView} or 203 * {@link android.view.LayoutInflater#inflate}). 204 * 205 * @param resid The style resource describing the theme. 206 */ 207 public abstract void setTheme(int resid); 208 209 /** 210 * Return the Theme object associated with this Context. 211 */ 212 public abstract Resources.Theme getTheme(); 213 214 /** 215 * Retrieve styled attribute information in this Context's theme. See 216 * {@link Resources.Theme#obtainStyledAttributes(int[])} 217 * for more information. 218 * 219 * @see Resources.Theme#obtainStyledAttributes(int[]) 220 */ 221 public final TypedArray obtainStyledAttributes( 222 int[] attrs) { 223 return getTheme().obtainStyledAttributes(attrs); 224 } 225 226 /** 227 * Retrieve styled attribute information in this Context's theme. See 228 * {@link Resources.Theme#obtainStyledAttributes(int, int[])} 229 * for more information. 230 * 231 * @see Resources.Theme#obtainStyledAttributes(int, int[]) 232 */ 233 public final TypedArray obtainStyledAttributes( 234 int resid, int[] attrs) throws Resources.NotFoundException { 235 return getTheme().obtainStyledAttributes(resid, attrs); 236 } 237 238 /** 239 * Retrieve styled attribute information in this Context's theme. See 240 * {@link Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)} 241 * for more information. 242 * 243 * @see Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 244 */ 245 public final TypedArray obtainStyledAttributes( 246 AttributeSet set, int[] attrs) { 247 return getTheme().obtainStyledAttributes(set, attrs, 0, 0); 248 } 249 250 /** 251 * Retrieve styled attribute information in this Context's theme. See 252 * {@link Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)} 253 * for more information. 254 * 255 * @see Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 256 */ 257 public final TypedArray obtainStyledAttributes( 258 AttributeSet set, int[] attrs, int defStyleAttr, int defStyleRes) { 259 return getTheme().obtainStyledAttributes( 260 set, attrs, defStyleAttr, defStyleRes); 261 } 262 263 /** 264 * Return a class loader you can use to retrieve classes in this package. 265 */ 266 public abstract ClassLoader getClassLoader(); 267 268 /** Return the name of this application's package. */ 269 public abstract String getPackageName(); 270 271 /** Return the full application info for this context's package. */ 272 public abstract ApplicationInfo getApplicationInfo(); 273 274 /** 275 * Return the full path to this context's primary Android package. 276 * The Android package is a ZIP file which contains the application's 277 * primary resources. 278 * 279 * <p>Note: this is not generally useful for applications, since they should 280 * not be directly accessing the file system. 281 * 282 * @return String Path to the resources. 283 */ 284 public abstract String getPackageResourcePath(); 285 286 /** 287 * Return the full path to this context's primary Android package. 288 * The Android package is a ZIP file which contains application's 289 * primary code and assets. 290 * 291 * <p>Note: this is not generally useful for applications, since they should 292 * not be directly accessing the file system. 293 * 294 * @return String Path to the code and assets. 295 */ 296 public abstract String getPackageCodePath(); 297 298 /** 299 * {@hide} 300 * Return the full path to the shared prefs file for the given prefs group name. 301 * 302 * <p>Note: this is not generally useful for applications, since they should 303 * not be directly accessing the file system. 304 */ 305 public abstract File getSharedPrefsFile(String name); 306 307 /** 308 * Retrieve and hold the contents of the preferences file 'name', returning 309 * a SharedPreferences through which you can retrieve and modify its 310 * values. Only one instance of the SharedPreferences object is returned 311 * to any callers for the same name, meaning they will see each other's 312 * edits as soon as they are made. 313 * 314 * @param name Desired preferences file. If a preferences file by this name 315 * does not exist, it will be created when you retrieve an 316 * editor (SharedPreferences.edit()) and then commit changes (Editor.commit()). 317 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 318 * default operation, {@link #MODE_WORLD_READABLE} 319 * and {@link #MODE_WORLD_WRITEABLE} to control permissions. 320 * 321 * @return Returns the single SharedPreferences instance that can be used 322 * to retrieve and modify the preference values. 323 * 324 * @see #MODE_PRIVATE 325 * @see #MODE_WORLD_READABLE 326 * @see #MODE_WORLD_WRITEABLE 327 */ 328 public abstract SharedPreferences getSharedPreferences(String name, 329 int mode); 330 331 /** 332 * Open a private file associated with this Context's application package 333 * for reading. 334 * 335 * @param name The name of the file to open; can not contain path 336 * separators. 337 * 338 * @return FileInputStream Resulting input stream. 339 * 340 * @see #openFileOutput 341 * @see #fileList 342 * @see #deleteFile 343 * @see java.io.FileInputStream#FileInputStream(String) 344 */ 345 public abstract FileInputStream openFileInput(String name) 346 throws FileNotFoundException; 347 348 /** 349 * Open a private file associated with this Context's application package 350 * for writing. Creates the file if it doesn't already exist. 351 * 352 * @param name The name of the file to open; can not contain path 353 * separators. 354 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 355 * default operation, {@link #MODE_APPEND} to append to an existing file, 356 * {@link #MODE_WORLD_READABLE} and {@link #MODE_WORLD_WRITEABLE} to control 357 * permissions. 358 * 359 * @return FileOutputStream Resulting output stream. 360 * 361 * @see #MODE_APPEND 362 * @see #MODE_PRIVATE 363 * @see #MODE_WORLD_READABLE 364 * @see #MODE_WORLD_WRITEABLE 365 * @see #openFileInput 366 * @see #fileList 367 * @see #deleteFile 368 * @see java.io.FileOutputStream#FileOutputStream(String) 369 */ 370 public abstract FileOutputStream openFileOutput(String name, int mode) 371 throws FileNotFoundException; 372 373 /** 374 * Delete the given private file associated with this Context's 375 * application package. 376 * 377 * @param name The name of the file to delete; can not contain path 378 * separators. 379 * 380 * @return True if the file was successfully deleted; else 381 * false. 382 * 383 * @see #openFileInput 384 * @see #openFileOutput 385 * @see #fileList 386 * @see java.io.File#delete() 387 */ 388 public abstract boolean deleteFile(String name); 389 390 /** 391 * Returns the absolute path on the filesystem where a file created with 392 * {@link #openFileOutput} is stored. 393 * 394 * @param name The name of the file for which you would like to get 395 * its path. 396 * 397 * @return Returns an absolute path to the given file. 398 * 399 * @see #openFileOutput 400 * @see #getFilesDir 401 * @see #getDir 402 */ 403 public abstract File getFileStreamPath(String name); 404 405 /** 406 * Returns the absolute path to the directory on the filesystem where 407 * files created with {@link #openFileOutput} are stored. 408 * 409 * @return Returns the path of the directory holding application files. 410 * 411 * @see #openFileOutput 412 * @see #getFileStreamPath 413 * @see #getDir 414 */ 415 public abstract File getFilesDir(); 416 417 /** 418 * Returns the absolute path to the directory on the external filesystem 419 * (that is somewhere on {@link android.os.Environment#getExternalStorageDirectory() 420 * Environment.getExternalStorageDirectory()} where the application can 421 * place persistent files it owns. These files are private to the 422 * applications, and not typically visible to the user as media. 423 * 424 * <p>This is like {@link #getFilesDir()} in that these 425 * files will be deleted when the application is uninstalled, however there 426 * are some important differences: 427 * 428 * <ul> 429 * <li>External files are not always available: they will disappear if the 430 * user mounts the external storage on a computer or removes it. See the 431 * APIs on {@link android.os.Environment} for information in the storage state. 432 * <li>There is no security enforced with these files. All applications 433 * can read and write files placed here. 434 * </ul> 435 * 436 * <p>Here is an example of typical code to manipulate a file in 437 * an application's private storage:</p> 438 * 439 * {@sample development/samples/ApiDemos/src/com/example/android/apis/content/ExternalStorage.java 440 * private_file} 441 * 442 * <p>If you install a non-null <var>type</var> to this function, the returned 443 * file will be a path to a sub-directory of the given type. Though these files 444 * are not automatically scanned by the media scanner, you can explicitly 445 * add them to the media database with 446 * {@link android.media.MediaScannerConnection#scanFile(Context, String[], String[], 447 * ScanResultListener) MediaScannerConnection.scanFile}. 448 * Note that this is not the same as 449 * {@link android.os.Environment#getExternalStoragePublicDirectory 450 * Environment.getExternalStoragePublicDirectory()}, which provides 451 * directories of media shared by all applications. The 452 * directories returned here are 453 * owned by the application, and its contents will be removed when the 454 * application is uninstalled. Unlike 455 * {@link android.os.Environment#getExternalStoragePublicDirectory 456 * Environment.getExternalStoragePublicDirectory()}, the directory 457 * returned here will be automatically created for you. 458 * 459 * <p>Here is an example of typical code to manipulate a picture in 460 * an application's private storage and add it to the media database:</p> 461 * 462 * {@sample development/samples/ApiDemos/src/com/example/android/apis/content/ExternalStorage.java 463 * private_picture} 464 * 465 * @param type The type of files directory to return. May be null for 466 * the root of the files directory or one of 467 * the following Environment constants for a subdirectory: 468 * {@link android.os.Environment#DIRECTORY_MUSIC}, 469 * {@link android.os.Environment#DIRECTORY_PODCASTS}, 470 * {@link android.os.Environment#DIRECTORY_RINGTONES}, 471 * {@link android.os.Environment#DIRECTORY_ALARMS}, 472 * {@link android.os.Environment#DIRECTORY_NOTIFICATIONS}, 473 * {@link android.os.Environment#DIRECTORY_PICTURES}, or 474 * {@link android.os.Environment#DIRECTORY_MOVIES}. 475 * 476 * @return Returns the path of the directory holding application files 477 * on external storage. Returns null if external storage is not currently 478 * mounted so it could not ensure the path exists; you will need to call 479 * this method again when it is available. 480 * 481 * @see #getFilesDir 482 */ 483 public abstract File getExternalFilesDir(String type); 484 485 /** 486 * Returns the absolute path to the application specific cache directory 487 * on the filesystem. These files will be ones that get deleted first when the 488 * device runs low on storage. 489 * There is no guarantee when these files will be deleted. 490 * 491 * <strong>Note: you should not <em>rely</em> on the system deleting these 492 * files for you; you should always have a reasonable maximum, such as 1 MB, 493 * for the amount of space you consume with cache files, and prune those 494 * files when exceeding that space.</strong> 495 * 496 * @return Returns the path of the directory holding application cache files. 497 * 498 * @see #openFileOutput 499 * @see #getFileStreamPath 500 * @see #getDir 501 */ 502 public abstract File getCacheDir(); 503 504 /** 505 * Returns the absolute path to the directory on the external filesystem 506 * (that is somewhere on {@link android.os.Environment#getExternalStorageDirectory() 507 * Environment.getExternalStorageDirectory()} where the application can 508 * place cache files it owns. 509 * 510 * <p>This is like {@link #getCacheDir()} in that these 511 * files will be deleted when the application is uninstalled, however there 512 * are some important differences: 513 * 514 * <ul> 515 * <li>The platform does not monitor the space available in external storage, 516 * and thus will not automatically delete these files. Note that you should 517 * be managing the maximum space you will use for these anyway, just like 518 * with {@link #getCacheDir()}. 519 * <li>External files are not always available: they will disappear if the 520 * user mounts the external storage on a computer or removes it. See the 521 * APIs on {@link android.os.Environment} for information in the storage state. 522 * <li>There is no security enforced with these files. All applications 523 * can read and write files placed here. 524 * </ul> 525 * 526 * @return Returns the path of the directory holding application cache files 527 * on external storage. Returns null if external storage is not currently 528 * mounted so it could not ensure the path exists; you will need to call 529 * this method again when it is available. 530 * 531 * @see #getCacheDir 532 */ 533 public abstract File getExternalCacheDir(); 534 535 /** 536 * Returns an array of strings naming the private files associated with 537 * this Context's application package. 538 * 539 * @return Array of strings naming the private files. 540 * 541 * @see #openFileInput 542 * @see #openFileOutput 543 * @see #deleteFile 544 */ 545 public abstract String[] fileList(); 546 547 /** 548 * Retrieve, creating if needed, a new directory in which the application 549 * can place its own custom data files. You can use the returned File 550 * object to create and access files in this directory. Note that files 551 * created through a File object will only be accessible by your own 552 * application; you can only set the mode of the entire directory, not 553 * of individual files. 554 * 555 * @param name Name of the directory to retrieve. This is a directory 556 * that is created as part of your application data. 557 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 558 * default operation, {@link #MODE_WORLD_READABLE} and 559 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 560 * 561 * @return Returns a File object for the requested directory. The directory 562 * will have been created if it does not already exist. 563 * 564 * @see #openFileOutput(String, int) 565 */ 566 public abstract File getDir(String name, int mode); 567 568 /** 569 * Open a new private SQLiteDatabase associated with this Context's 570 * application package. Create the database file if it doesn't exist. 571 * 572 * @param name The name (unique in the application package) of the database. 573 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 574 * default operation, {@link #MODE_WORLD_READABLE} 575 * and {@link #MODE_WORLD_WRITEABLE} to control permissions. 576 * @param factory An optional factory class that is called to instantiate a 577 * cursor when query is called. 578 * 579 * @return The contents of a newly created database with the given name. 580 * @throws android.database.sqlite.SQLiteException if the database file could not be opened. 581 * 582 * @see #MODE_PRIVATE 583 * @see #MODE_WORLD_READABLE 584 * @see #MODE_WORLD_WRITEABLE 585 * @see #deleteDatabase 586 */ 587 public abstract SQLiteDatabase openOrCreateDatabase(String name, 588 int mode, CursorFactory factory); 589 590 /** 591 * Delete an existing private SQLiteDatabase associated with this Context's 592 * application package. 593 * 594 * @param name The name (unique in the application package) of the 595 * database. 596 * 597 * @return True if the database was successfully deleted; else false. 598 * 599 * @see #openOrCreateDatabase 600 */ 601 public abstract boolean deleteDatabase(String name); 602 603 /** 604 * Returns the absolute path on the filesystem where a database created with 605 * {@link #openOrCreateDatabase} is stored. 606 * 607 * @param name The name of the database for which you would like to get 608 * its path. 609 * 610 * @return Returns an absolute path to the given database. 611 * 612 * @see #openOrCreateDatabase 613 */ 614 public abstract File getDatabasePath(String name); 615 616 /** 617 * Returns an array of strings naming the private databases associated with 618 * this Context's application package. 619 * 620 * @return Array of strings naming the private databases. 621 * 622 * @see #openOrCreateDatabase 623 * @see #deleteDatabase 624 */ 625 public abstract String[] databaseList(); 626 627 /** 628 * @deprecated Use {@link android.app.WallpaperManager#getDrawable 629 * WallpaperManager.get()} instead. 630 */ 631 @Deprecated 632 public abstract Drawable getWallpaper(); 633 634 /** 635 * @deprecated Use {@link android.app.WallpaperManager#peekDrawable 636 * WallpaperManager.peek()} instead. 637 */ 638 @Deprecated 639 public abstract Drawable peekWallpaper(); 640 641 /** 642 * @deprecated Use {@link android.app.WallpaperManager#getDesiredMinimumWidth() 643 * WallpaperManager.getDesiredMinimumWidth()} instead. 644 */ 645 @Deprecated 646 public abstract int getWallpaperDesiredMinimumWidth(); 647 648 /** 649 * @deprecated Use {@link android.app.WallpaperManager#getDesiredMinimumHeight() 650 * WallpaperManager.getDesiredMinimumHeight()} instead. 651 */ 652 @Deprecated 653 public abstract int getWallpaperDesiredMinimumHeight(); 654 655 /** 656 * @deprecated Use {@link android.app.WallpaperManager#setBitmap(Bitmap) 657 * WallpaperManager.set()} instead. 658 */ 659 @Deprecated 660 public abstract void setWallpaper(Bitmap bitmap) throws IOException; 661 662 /** 663 * @deprecated Use {@link android.app.WallpaperManager#setStream(InputStream) 664 * WallpaperManager.set()} instead. 665 */ 666 @Deprecated 667 public abstract void setWallpaper(InputStream data) throws IOException; 668 669 /** 670 * @deprecated Use {@link android.app.WallpaperManager#clear 671 * WallpaperManager.clear()} instead. 672 */ 673 @Deprecated 674 public abstract void clearWallpaper() throws IOException; 675 676 /** 677 * Launch a new activity. You will not receive any information about when 678 * the activity exits. 679 * 680 * <p>Note that if this method is being called from outside of an 681 * {@link android.app.Activity} Context, then the Intent must include 682 * the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag. This is because, 683 * without being started from an existing Activity, there is no existing 684 * task in which to place the new activity and thus it needs to be placed 685 * in its own separate task. 686 * 687 * <p>This method throws {@link ActivityNotFoundException} 688 * if there was no Activity found to run the given Intent. 689 * 690 * @param intent The description of the activity to start. 691 * 692 * @throws ActivityNotFoundException 693 * 694 * @see PackageManager#resolveActivity 695 */ 696 public abstract void startActivity(Intent intent); 697 698 /** 699 * Like {@link #startActivity(Intent)}, but taking a IntentSender 700 * to start. If the IntentSender is for an activity, that activity will be started 701 * as if you had called the regular {@link #startActivity(Intent)} 702 * here; otherwise, its associated action will be executed (such as 703 * sending a broadcast) as if you had called 704 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 705 * 706 * @param intent The IntentSender to launch. 707 * @param fillInIntent If non-null, this will be provided as the 708 * intent parameter to {@link IntentSender#sendIntent}. 709 * @param flagsMask Intent flags in the original IntentSender that you 710 * would like to change. 711 * @param flagsValues Desired values for any bits set in 712 * <var>flagsMask</var> 713 * @param extraFlags Always set to 0. 714 */ 715 public abstract void startIntentSender(IntentSender intent, 716 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 717 throws IntentSender.SendIntentException; 718 719 /** 720 * Broadcast the given intent to all interested BroadcastReceivers. This 721 * call is asynchronous; it returns immediately, and you will continue 722 * executing while the receivers are run. No results are propagated from 723 * receivers and receivers can not abort the broadcast. If you want 724 * to allow receivers to propagate results or abort the broadcast, you must 725 * send an ordered broadcast using 726 * {@link #sendOrderedBroadcast(Intent, String)}. 727 * 728 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 729 * 730 * @param intent The Intent to broadcast; all receivers matching this 731 * Intent will receive the broadcast. 732 * 733 * @see android.content.BroadcastReceiver 734 * @see #registerReceiver 735 * @see #sendBroadcast(Intent, String) 736 * @see #sendOrderedBroadcast(Intent, String) 737 * @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle) 738 */ 739 public abstract void sendBroadcast(Intent intent); 740 741 /** 742 * Broadcast the given intent to all interested BroadcastReceivers, allowing 743 * an optional required permission to be enforced. This 744 * call is asynchronous; it returns immediately, and you will continue 745 * executing while the receivers are run. No results are propagated from 746 * receivers and receivers can not abort the broadcast. If you want 747 * to allow receivers to propagate results or abort the broadcast, you must 748 * send an ordered broadcast using 749 * {@link #sendOrderedBroadcast(Intent, String)}. 750 * 751 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 752 * 753 * @param intent The Intent to broadcast; all receivers matching this 754 * Intent will receive the broadcast. 755 * @param receiverPermission (optional) String naming a permissions that 756 * a receiver must hold in order to receive your broadcast. 757 * If null, no permission is required. 758 * 759 * @see android.content.BroadcastReceiver 760 * @see #registerReceiver 761 * @see #sendBroadcast(Intent) 762 * @see #sendOrderedBroadcast(Intent, String) 763 * @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle) 764 */ 765 public abstract void sendBroadcast(Intent intent, 766 String receiverPermission); 767 768 /** 769 * Broadcast the given intent to all interested BroadcastReceivers, delivering 770 * them one at a time to allow more preferred receivers to consume the 771 * broadcast before it is delivered to less preferred receivers. This 772 * call is asynchronous; it returns immediately, and you will continue 773 * executing while the receivers are run. 774 * 775 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 776 * 777 * @param intent The Intent to broadcast; all receivers matching this 778 * Intent will receive the broadcast. 779 * @param receiverPermission (optional) String naming a permissions that 780 * a receiver must hold in order to receive your broadcast. 781 * If null, no permission is required. 782 * 783 * @see android.content.BroadcastReceiver 784 * @see #registerReceiver 785 * @see #sendBroadcast(Intent) 786 * @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle) 787 */ 788 public abstract void sendOrderedBroadcast(Intent intent, 789 String receiverPermission); 790 791 /** 792 * Version of {@link #sendBroadcast(Intent)} that allows you to 793 * receive data back from the broadcast. This is accomplished by 794 * supplying your own BroadcastReceiver when calling, which will be 795 * treated as a final receiver at the end of the broadcast -- its 796 * {@link BroadcastReceiver#onReceive} method will be called with 797 * the result values collected from the other receivers. The broadcast will 798 * be serialized in the same way as calling 799 * {@link #sendOrderedBroadcast(Intent, String)}. 800 * 801 * <p>Like {@link #sendBroadcast(Intent)}, this method is 802 * asynchronous; it will return before 803 * resultReceiver.onReceive() is called. 804 * 805 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 806 * 807 * @param intent The Intent to broadcast; all receivers matching this 808 * Intent will receive the broadcast. 809 * @param receiverPermission String naming a permissions that 810 * a receiver must hold in order to receive your broadcast. 811 * If null, no permission is required. 812 * @param resultReceiver Your own BroadcastReceiver to treat as the final 813 * receiver of the broadcast. 814 * @param scheduler A custom Handler with which to schedule the 815 * resultReceiver callback; if null it will be 816 * scheduled in the Context's main thread. 817 * @param initialCode An initial value for the result code. Often 818 * Activity.RESULT_OK. 819 * @param initialData An initial value for the result data. Often 820 * null. 821 * @param initialExtras An initial value for the result extras. Often 822 * null. 823 * 824 * @see #sendBroadcast(Intent) 825 * @see #sendBroadcast(Intent, String) 826 * @see #sendOrderedBroadcast(Intent, String) 827 * @see #sendStickyBroadcast(Intent) 828 * @see #sendStickyOrderedBroadcast(Intent, BroadcastReceiver, Handler, int, String, Bundle) 829 * @see android.content.BroadcastReceiver 830 * @see #registerReceiver 831 * @see android.app.Activity#RESULT_OK 832 */ 833 public abstract void sendOrderedBroadcast(Intent intent, 834 String receiverPermission, BroadcastReceiver resultReceiver, 835 Handler scheduler, int initialCode, String initialData, 836 Bundle initialExtras); 837 838 /** 839 * Perform a {@link #sendBroadcast(Intent)} that is "sticky," meaning the 840 * Intent you are sending stays around after the broadcast is complete, 841 * so that others can quickly retrieve that data through the return 842 * value of {@link #registerReceiver(BroadcastReceiver, IntentFilter)}. In 843 * all other ways, this behaves the same as 844 * {@link #sendBroadcast(Intent)}. 845 * 846 * <p>You must hold the {@link android.Manifest.permission#BROADCAST_STICKY} 847 * permission in order to use this API. If you do not hold that 848 * permission, {@link SecurityException} will be thrown. 849 * 850 * @param intent The Intent to broadcast; all receivers matching this 851 * Intent will receive the broadcast, and the Intent will be held to 852 * be re-broadcast to future receivers. 853 * 854 * @see #sendBroadcast(Intent) 855 * @see #sendStickyOrderedBroadcast(Intent, BroadcastReceiver, Handler, int, String, Bundle) 856 */ 857 public abstract void sendStickyBroadcast(Intent intent); 858 859 /** 860 * Version of {@link #sendStickyBroadcast} that allows you to 861 * receive data back from the broadcast. This is accomplished by 862 * supplying your own BroadcastReceiver when calling, which will be 863 * treated as a final receiver at the end of the broadcast -- its 864 * {@link BroadcastReceiver#onReceive} method will be called with 865 * the result values collected from the other receivers. The broadcast will 866 * be serialized in the same way as calling 867 * {@link #sendOrderedBroadcast(Intent, String)}. 868 * 869 * <p>Like {@link #sendBroadcast(Intent)}, this method is 870 * asynchronous; it will return before 871 * resultReceiver.onReceive() is called. Note that the sticky data 872 * stored is only the data you initially supply to the broadcast, not 873 * the result of any changes made by the receivers. 874 * 875 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 876 * 877 * @param intent The Intent to broadcast; all receivers matching this 878 * Intent will receive the broadcast. 879 * @param resultReceiver Your own BroadcastReceiver to treat as the final 880 * receiver of the broadcast. 881 * @param scheduler A custom Handler with which to schedule the 882 * resultReceiver callback; if null it will be 883 * scheduled in the Context's main thread. 884 * @param initialCode An initial value for the result code. Often 885 * Activity.RESULT_OK. 886 * @param initialData An initial value for the result data. Often 887 * null. 888 * @param initialExtras An initial value for the result extras. Often 889 * null. 890 * 891 * @see #sendBroadcast(Intent) 892 * @see #sendBroadcast(Intent, String) 893 * @see #sendOrderedBroadcast(Intent, String) 894 * @see #sendStickyBroadcast(Intent) 895 * @see android.content.BroadcastReceiver 896 * @see #registerReceiver 897 * @see android.app.Activity#RESULT_OK 898 */ 899 public abstract void sendStickyOrderedBroadcast(Intent intent, 900 BroadcastReceiver resultReceiver, 901 Handler scheduler, int initialCode, String initialData, 902 Bundle initialExtras); 903 904 905 /** 906 * Remove the data previously sent with {@link #sendStickyBroadcast}, 907 * so that it is as if the sticky broadcast had never happened. 908 * 909 * <p>You must hold the {@link android.Manifest.permission#BROADCAST_STICKY} 910 * permission in order to use this API. If you do not hold that 911 * permission, {@link SecurityException} will be thrown. 912 * 913 * @param intent The Intent that was previously broadcast. 914 * 915 * @see #sendStickyBroadcast 916 */ 917 public abstract void removeStickyBroadcast(Intent intent); 918 919 /** 920 * Register a BroadcastReceiver to be run in the main activity thread. The 921 * <var>receiver</var> will be called with any broadcast Intent that 922 * matches <var>filter</var>, in the main application thread. 923 * 924 * <p>The system may broadcast Intents that are "sticky" -- these stay 925 * around after the broadcast as finished, to be sent to any later 926 * registrations. If your IntentFilter matches one of these sticky 927 * Intents, that Intent will be returned by this function 928 * <strong>and</strong> sent to your <var>receiver</var> as if it had just 929 * been broadcast. 930 * 931 * <p>There may be multiple sticky Intents that match <var>filter</var>, 932 * in which case each of these will be sent to <var>receiver</var>. In 933 * this case, only one of these can be returned directly by the function; 934 * which of these that is returned is arbitrarily decided by the system. 935 * 936 * <p>If you know the Intent your are registering for is sticky, you can 937 * supply null for your <var>receiver</var>. In this case, no receiver is 938 * registered -- the function simply returns the sticky Intent that 939 * matches <var>filter</var>. In the case of multiple matches, the same 940 * rules as described above apply. 941 * 942 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 943 * 944 * <p class="note">Note: this method <em>cannot be called from a 945 * {@link BroadcastReceiver} component;</em> that is, from a BroadcastReceiver 946 * that is declared in an application's manifest. It is okay, however, to call 947 * this method from another BroadcastReceiver that has itself been registered 948 * at run time with {@link #registerReceiver}, since the lifetime of such a 949 * registered BroadcastReceiver is tied to the object that registered it.</p> 950 * 951 * @param receiver The BroadcastReceiver to handle the broadcast. 952 * @param filter Selects the Intent broadcasts to be received. 953 * 954 * @return The first sticky intent found that matches <var>filter</var>, 955 * or null if there are none. 956 * 957 * @see #registerReceiver(BroadcastReceiver, IntentFilter, String, Handler) 958 * @see #sendBroadcast 959 * @see #unregisterReceiver 960 */ 961 public abstract Intent registerReceiver(BroadcastReceiver receiver, 962 IntentFilter filter); 963 964 /** 965 * Register to receive intent broadcasts, to run in the context of 966 * <var>scheduler</var>. See 967 * {@link #registerReceiver(BroadcastReceiver, IntentFilter)} for more 968 * information. This allows you to enforce permissions on who can 969 * broadcast intents to your receiver, or have the receiver run in 970 * a different thread than the main application thread. 971 * 972 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 973 * 974 * @param receiver The BroadcastReceiver to handle the broadcast. 975 * @param filter Selects the Intent broadcasts to be received. 976 * @param broadcastPermission String naming a permissions that a 977 * broadcaster must hold in order to send an Intent to you. If null, 978 * no permission is required. 979 * @param scheduler Handler identifying the thread that will receive 980 * the Intent. If null, the main thread of the process will be used. 981 * 982 * @return The first sticky intent found that matches <var>filter</var>, 983 * or null if there are none. 984 * 985 * @see #registerReceiver(BroadcastReceiver, IntentFilter) 986 * @see #sendBroadcast 987 * @see #unregisterReceiver 988 */ 989 public abstract Intent registerReceiver(BroadcastReceiver receiver, 990 IntentFilter filter, 991 String broadcastPermission, 992 Handler scheduler); 993 994 /** 995 * Unregister a previously registered BroadcastReceiver. <em>All</em> 996 * filters that have been registered for this BroadcastReceiver will be 997 * removed. 998 * 999 * @param receiver The BroadcastReceiver to unregister. 1000 * 1001 * @see #registerReceiver 1002 */ 1003 public abstract void unregisterReceiver(BroadcastReceiver receiver); 1004 1005 /** 1006 * Request that a given application service be started. The Intent 1007 * can either contain the complete class name of a specific service 1008 * implementation to start, or an abstract definition through the 1009 * action and other fields of the kind of service to start. If this service 1010 * is not already running, it will be instantiated and started (creating a 1011 * process for it if needed); if it is running then it remains running. 1012 * 1013 * <p>Every call to this method will result in a corresponding call to 1014 * the target service's {@link android.app.Service#onStart} method, 1015 * with the <var>intent</var> given here. This provides a convenient way 1016 * to submit jobs to a service without having to bind and call on to its 1017 * interface. 1018 * 1019 * <p>Using startService() overrides the default service lifetime that is 1020 * managed by {@link #bindService}: it requires the service to remain 1021 * running until {@link #stopService} is called, regardless of whether 1022 * any clients are connected to it. Note that calls to startService() 1023 * are not nesting: no matter how many times you call startService(), 1024 * a single call to {@link #stopService} will stop it. 1025 * 1026 * <p>The system attempts to keep running services around as much as 1027 * possible. The only time they should be stopped is if the current 1028 * foreground application is using so many resources that the service needs 1029 * to be killed. If any errors happen in the service's process, it will 1030 * automatically be restarted. 1031 * 1032 * <p>This function will throw {@link SecurityException} if you do not 1033 * have permission to start the given service. 1034 * 1035 * @param service Identifies the service to be started. The Intent may 1036 * specify either an explicit component name to start, or a logical 1037 * description (action, category, etc) to match an 1038 * {@link IntentFilter} published by a service. Additional values 1039 * may be included in the Intent extras to supply arguments along with 1040 * this specific start call. 1041 * 1042 * @return If the service is being started or is already running, the 1043 * {@link ComponentName} of the actual service that was started is 1044 * returned; else if the service does not exist null is returned. 1045 * 1046 * @throws SecurityException 1047 * 1048 * @see #stopService 1049 * @see #bindService 1050 */ 1051 public abstract ComponentName startService(Intent service); 1052 1053 /** 1054 * Request that a given application service be stopped. If the service is 1055 * not running, nothing happens. Otherwise it is stopped. Note that calls 1056 * to startService() are not counted -- this stops the service no matter 1057 * how many times it was started. 1058 * 1059 * <p>Note that if a stopped service still has {@link ServiceConnection} 1060 * objects bound to it with the {@link #BIND_AUTO_CREATE} set, it will 1061 * not be destroyed until all of these bindings are removed. See 1062 * the {@link android.app.Service} documentation for more details on a 1063 * service's lifecycle. 1064 * 1065 * <p>This function will throw {@link SecurityException} if you do not 1066 * have permission to stop the given service. 1067 * 1068 * @param service Description of the service to be stopped. The Intent may 1069 * specify either an explicit component name to start, or a logical 1070 * description (action, category, etc) to match an 1071 * {@link IntentFilter} published by a service. 1072 * 1073 * @return If there is a service matching the given Intent that is already 1074 * running, then it is stopped and true is returned; else false is returned. 1075 * 1076 * @throws SecurityException 1077 * 1078 * @see #startService 1079 */ 1080 public abstract boolean stopService(Intent service); 1081 1082 /** 1083 * Connect to an application service, creating it if needed. This defines 1084 * a dependency between your application and the service. The given 1085 * <var>conn</var> will receive the service object when its created and be 1086 * told if it dies and restarts. The service will be considered required 1087 * by the system only for as long as the calling context exists. For 1088 * example, if this Context is an Activity that is stopped, the service will 1089 * not be required to continue running until the Activity is resumed. 1090 * 1091 * <p>This function will throw {@link SecurityException} if you do not 1092 * have permission to bind to the given service. 1093 * 1094 * <p class="note">Note: this method <em>can not be called from an 1095 * {@link BroadcastReceiver} component</em>. A pattern you can use to 1096 * communicate from an BroadcastReceiver to a Service is to call 1097 * {@link #startService} with the arguments containing the command to be 1098 * sent, with the service calling its 1099 * {@link android.app.Service#stopSelf(int)} method when done executing 1100 * that command. See the API demo App/Service/Service Start Arguments 1101 * Controller for an illustration of this. It is okay, however, to use 1102 * this method from an BroadcastReceiver that has been registered with 1103 * {@link #registerReceiver}, since the lifetime of this BroadcastReceiver 1104 * is tied to another object (the one that registered it).</p> 1105 * 1106 * @param service Identifies the service to connect to. The Intent may 1107 * specify either an explicit component name, or a logical 1108 * description (action, category, etc) to match an 1109 * {@link IntentFilter} published by a service. 1110 * @param conn Receives information as the service is started and stopped. 1111 * @param flags Operation options for the binding. May be 0 or 1112 * {@link #BIND_AUTO_CREATE}. 1113 * @return If you have successfully bound to the service, true is returned; 1114 * false is returned if the connection is not made so you will not 1115 * receive the service object. 1116 * 1117 * @throws SecurityException 1118 * 1119 * @see #unbindService 1120 * @see #startService 1121 * @see #BIND_AUTO_CREATE 1122 */ 1123 public abstract boolean bindService(Intent service, ServiceConnection conn, 1124 int flags); 1125 1126 /** 1127 * Disconnect from an application service. You will no longer receive 1128 * calls as the service is restarted, and the service is now allowed to 1129 * stop at any time. 1130 * 1131 * @param conn The connection interface previously supplied to 1132 * bindService(). 1133 * 1134 * @see #bindService 1135 */ 1136 public abstract void unbindService(ServiceConnection conn); 1137 1138 /** 1139 * Start executing an {@link android.app.Instrumentation} class. The given 1140 * Instrumentation component will be run by killing its target application 1141 * (if currently running), starting the target process, instantiating the 1142 * instrumentation component, and then letting it drive the application. 1143 * 1144 * <p>This function is not synchronous -- it returns as soon as the 1145 * instrumentation has started and while it is running. 1146 * 1147 * <p>Instrumentation is normally only allowed to run against a package 1148 * that is either unsigned or signed with a signature that the 1149 * the instrumentation package is also signed with (ensuring the target 1150 * trusts the instrumentation). 1151 * 1152 * @param className Name of the Instrumentation component to be run. 1153 * @param profileFile Optional path to write profiling data as the 1154 * instrumentation runs, or null for no profiling. 1155 * @param arguments Additional optional arguments to pass to the 1156 * instrumentation, or null. 1157 * 1158 * @return Returns true if the instrumentation was successfully started, 1159 * else false if it could not be found. 1160 */ 1161 public abstract boolean startInstrumentation(ComponentName className, 1162 String profileFile, Bundle arguments); 1163 1164 /** 1165 * Return the handle to a system-level service by name. The class of the 1166 * returned object varies by the requested name. Currently available names 1167 * are: 1168 * 1169 * <dl> 1170 * <dt> {@link #WINDOW_SERVICE} ("window") 1171 * <dd> The top-level window manager in which you can place custom 1172 * windows. The returned object is a {@link android.view.WindowManager}. 1173 * <dt> {@link #LAYOUT_INFLATER_SERVICE} ("layout_inflater") 1174 * <dd> A {@link android.view.LayoutInflater} for inflating layout resources 1175 * in this context. 1176 * <dt> {@link #ACTIVITY_SERVICE} ("activity") 1177 * <dd> A {@link android.app.ActivityManager} for interacting with the 1178 * global activity state of the system. 1179 * <dt> {@link #POWER_SERVICE} ("power") 1180 * <dd> A {@link android.os.PowerManager} for controlling power 1181 * management. 1182 * <dt> {@link #ALARM_SERVICE} ("alarm") 1183 * <dd> A {@link android.app.AlarmManager} for receiving intents at the 1184 * time of your choosing. 1185 * <dt> {@link #NOTIFICATION_SERVICE} ("notification") 1186 * <dd> A {@link android.app.NotificationManager} for informing the user 1187 * of background events. 1188 * <dt> {@link #KEYGUARD_SERVICE} ("keyguard") 1189 * <dd> A {@link android.app.KeyguardManager} for controlling keyguard. 1190 * <dt> {@link #LOCATION_SERVICE} ("location") 1191 * <dd> A {@link android.location.LocationManager} for controlling location 1192 * (e.g., GPS) updates. 1193 * <dt> {@link #SEARCH_SERVICE} ("search") 1194 * <dd> A {@link android.app.SearchManager} for handling search. 1195 * <dt> {@link #VIBRATOR_SERVICE} ("vibrator") 1196 * <dd> A {@link android.os.Vibrator} for interacting with the vibrator 1197 * hardware. 1198 * <dt> {@link #CONNECTIVITY_SERVICE} ("connection") 1199 * <dd> A {@link android.net.ConnectivityManager ConnectivityManager} for 1200 * handling management of network connections. 1201 * <dt> {@link #WIFI_SERVICE} ("wifi") 1202 * <dd> A {@link android.net.wifi.WifiManager WifiManager} for management of 1203 * Wi-Fi connectivity. 1204 * <dt> {@link #INPUT_METHOD_SERVICE} ("input_method") 1205 * <dd> An {@link android.view.inputmethod.InputMethodManager InputMethodManager} 1206 * for management of input methods. 1207 * </dl> 1208 * 1209 * <p>Note: System services obtained via this API may be closely associated with 1210 * the Context in which they are obtained from. In general, do not share the 1211 * service objects between various different contexts (Activities, Applications, 1212 * Services, Providers, etc.) 1213 * 1214 * @param name The name of the desired service. 1215 * 1216 * @return The service or null if the name does not exist. 1217 * 1218 * @see #WINDOW_SERVICE 1219 * @see android.view.WindowManager 1220 * @see #LAYOUT_INFLATER_SERVICE 1221 * @see android.view.LayoutInflater 1222 * @see #ACTIVITY_SERVICE 1223 * @see android.app.ActivityManager 1224 * @see #POWER_SERVICE 1225 * @see android.os.PowerManager 1226 * @see #ALARM_SERVICE 1227 * @see android.app.AlarmManager 1228 * @see #NOTIFICATION_SERVICE 1229 * @see android.app.NotificationManager 1230 * @see #KEYGUARD_SERVICE 1231 * @see android.app.KeyguardManager 1232 * @see #LOCATION_SERVICE 1233 * @see android.location.LocationManager 1234 * @see #SEARCH_SERVICE 1235 * @see android.app.SearchManager 1236 * @see #SENSOR_SERVICE 1237 * @see android.hardware.SensorManager 1238 * @see #STORAGE_SERVICE 1239 * @see android.os.storage.StorageManager 1240 * @see #VIBRATOR_SERVICE 1241 * @see android.os.Vibrator 1242 * @see #CONNECTIVITY_SERVICE 1243 * @see android.net.ConnectivityManager 1244 * @see #WIFI_SERVICE 1245 * @see android.net.wifi.WifiManager 1246 * @see #AUDIO_SERVICE 1247 * @see android.media.AudioManager 1248 * @see #TELEPHONY_SERVICE 1249 * @see android.telephony.TelephonyManager 1250 * @see #INPUT_METHOD_SERVICE 1251 * @see android.view.inputmethod.InputMethodManager 1252 */ 1253 public abstract Object getSystemService(String name); 1254 1255 /** 1256 * Use with {@link #getSystemService} to retrieve a 1257 * {@link android.os.PowerManager} for controlling power management, 1258 * including "wake locks," which let you keep the device on while 1259 * you're running long tasks. 1260 */ 1261 public static final String POWER_SERVICE = "power"; 1262 1263 /** 1264 * Use with {@link #getSystemService} to retrieve a 1265 * {@link android.view.WindowManager} for accessing the system's window 1266 * manager. 1267 * 1268 * @see #getSystemService 1269 * @see android.view.WindowManager 1270 */ 1271 public static final String WINDOW_SERVICE = "window"; 1272 1273 /** 1274 * Use with {@link #getSystemService} to retrieve a 1275 * {@link android.view.LayoutInflater} for inflating layout resources in this 1276 * context. 1277 * 1278 * @see #getSystemService 1279 * @see android.view.LayoutInflater 1280 */ 1281 public static final String LAYOUT_INFLATER_SERVICE = "layout_inflater"; 1282 1283 /** 1284 * Use with {@link #getSystemService} to retrieve a 1285 * {@link android.accounts.AccountManager} for receiving intents at a 1286 * time of your choosing. 1287 * 1288 * @see #getSystemService 1289 * @see android.accounts.AccountManager 1290 */ 1291 public static final String ACCOUNT_SERVICE = "account"; 1292 1293 /** 1294 * Use with {@link #getSystemService} to retrieve a 1295 * {@link android.app.ActivityManager} for interacting with the global 1296 * system state. 1297 * 1298 * @see #getSystemService 1299 * @see android.app.ActivityManager 1300 */ 1301 public static final String ACTIVITY_SERVICE = "activity"; 1302 1303 /** 1304 * Use with {@link #getSystemService} to retrieve a 1305 * {@link android.app.AlarmManager} for receiving intents at a 1306 * time of your choosing. 1307 * 1308 * @see #getSystemService 1309 * @see android.app.AlarmManager 1310 */ 1311 public static final String ALARM_SERVICE = "alarm"; 1312 1313 /** 1314 * Use with {@link #getSystemService} to retrieve a 1315 * {@link android.app.NotificationManager} for informing the user of 1316 * background events. 1317 * 1318 * @see #getSystemService 1319 * @see android.app.NotificationManager 1320 */ 1321 public static final String NOTIFICATION_SERVICE = "notification"; 1322 1323 /** 1324 * Use with {@link #getSystemService} to retrieve a 1325 * {@link android.view.accessibility.AccessibilityManager} for giving the user 1326 * feedback for UI events through the registered event listeners. 1327 * 1328 * @see #getSystemService 1329 * @see android.view.accessibility.AccessibilityManager 1330 */ 1331 public static final String ACCESSIBILITY_SERVICE = "accessibility"; 1332 1333 /** 1334 * Use with {@link #getSystemService} to retrieve a 1335 * {@link android.app.NotificationManager} for controlling keyguard. 1336 * 1337 * @see #getSystemService 1338 * @see android.app.KeyguardManager 1339 */ 1340 public static final String KEYGUARD_SERVICE = "keyguard"; 1341 1342 /** 1343 * Use with {@link #getSystemService} to retrieve a {@link 1344 * android.location.LocationManager} for controlling location 1345 * updates. 1346 * 1347 * @see #getSystemService 1348 * @see android.location.LocationManager 1349 */ 1350 public static final String LOCATION_SERVICE = "location"; 1351 1352 /** 1353 * Use with {@link #getSystemService} to retrieve a {@link 1354 * android.app.SearchManager} for handling searches. 1355 * 1356 * @see #getSystemService 1357 * @see android.app.SearchManager 1358 */ 1359 public static final String SEARCH_SERVICE = "search"; 1360 1361 /** 1362 * Use with {@link #getSystemService} to retrieve a {@link 1363 * android.hardware.SensorManager} for accessing sensors. 1364 * 1365 * @see #getSystemService 1366 * @see android.hardware.SensorManager 1367 */ 1368 public static final String SENSOR_SERVICE = "sensor"; 1369 1370 /** 1371 * Use with {@link #getSystemService} to retrieve a {@link 1372 * android.os.storage.StorageManager} for accesssing system storage 1373 * functions. 1374 * 1375 * @see #getSystemService 1376 * @see android.os.storage.StorageManager 1377 */ 1378 public static final String STORAGE_SERVICE = "storage"; 1379 1380 /** 1381 * Use with {@link #getSystemService} to retrieve a 1382 * com.android.server.WallpaperService for accessing wallpapers. 1383 * 1384 * @see #getSystemService 1385 */ 1386 public static final String WALLPAPER_SERVICE = "wallpaper"; 1387 1388 /** 1389 * Use with {@link #getSystemService} to retrieve a {@link 1390 * android.os.Vibrator} for interacting with the vibration hardware. 1391 * 1392 * @see #getSystemService 1393 * @see android.os.Vibrator 1394 */ 1395 public static final String VIBRATOR_SERVICE = "vibrator"; 1396 1397 /** 1398 * Use with {@link #getSystemService} to retrieve a {@link 1399 * android.app.StatusBarManager} for interacting with the status bar. 1400 * 1401 * @see #getSystemService 1402 * @see android.app.StatusBarManager 1403 * @hide 1404 */ 1405 public static final String STATUS_BAR_SERVICE = "statusbar"; 1406 1407 /** 1408 * Use with {@link #getSystemService} to retrieve a {@link 1409 * android.net.ConnectivityManager} for handling management of 1410 * network connections. 1411 * 1412 * @see #getSystemService 1413 * @see android.net.ConnectivityManager 1414 */ 1415 public static final String CONNECTIVITY_SERVICE = "connectivity"; 1416 1417 /** 1418 * Use with {@link #getSystemService} to retrieve a {@link 1419 * android.net.NetworkManagementService} for handling management of 1420 * system network services 1421 * 1422 * @hide 1423 * @see #getSystemService 1424 * @see android.net.NetworkManagementService 1425 */ 1426 public static final String NETWORKMANAGEMENT_SERVICE = "network_management"; 1427 1428 /** 1429 * Use with {@link #getSystemService} to retrieve a {@link 1430 * android.net.wifi.WifiManager} for handling management of 1431 * Wi-Fi access. 1432 * 1433 * @see #getSystemService 1434 * @see android.net.wifi.WifiManager 1435 */ 1436 public static final String WIFI_SERVICE = "wifi"; 1437 1438 /** 1439 * Use with {@link #getSystemService} to retrieve a 1440 * {@link android.media.AudioManager} for handling management of volume, 1441 * ringer modes and audio routing. 1442 * 1443 * @see #getSystemService 1444 * @see android.media.AudioManager 1445 */ 1446 public static final String AUDIO_SERVICE = "audio"; 1447 1448 /** 1449 * Use with {@link #getSystemService} to retrieve a 1450 * {@link android.telephony.TelephonyManager} for handling management the 1451 * telephony features of the device. 1452 * 1453 * @see #getSystemService 1454 * @see android.telephony.TelephonyManager 1455 */ 1456 public static final String TELEPHONY_SERVICE = "phone"; 1457 1458 /** 1459 * Use with {@link #getSystemService} to retrieve a 1460 * {@link android.text.ClipboardManager} for accessing and modifying 1461 * the contents of the global clipboard. 1462 * 1463 * @see #getSystemService 1464 * @see android.text.ClipboardManager 1465 */ 1466 public static final String CLIPBOARD_SERVICE = "clipboard"; 1467 1468 /** 1469 * Use with {@link #getSystemService} to retrieve a 1470 * {@link android.view.inputmethod.InputMethodManager} for accessing input 1471 * methods. 1472 * 1473 * @see #getSystemService 1474 */ 1475 public static final String INPUT_METHOD_SERVICE = "input_method"; 1476 1477 /** 1478 * Use with {@link #getSystemService} to retrieve a 1479 * {@link android.appwidget.AppWidgetManager} for accessing AppWidgets. 1480 * 1481 * @hide 1482 * @see #getSystemService 1483 */ 1484 public static final String APPWIDGET_SERVICE = "appwidget"; 1485 1486 /** 1487 * Use with {@link #getSystemService} to retrieve an 1488 * {@link android.backup.IBackupManager IBackupManager} for communicating 1489 * with the backup mechanism. 1490 * @hide 1491 * 1492 * @see #getSystemService 1493 */ 1494 public static final String BACKUP_SERVICE = "backup"; 1495 1496 /** 1497 * Use with {@link #getSystemService} to retrieve a 1498 * {@link android.os.DropBoxManager} instance for recording 1499 * diagnostic logs. 1500 * @see #getSystemService 1501 */ 1502 public static final String DROPBOX_SERVICE = "dropbox"; 1503 1504 /** 1505 * Use with {@link #getSystemService} to retrieve a 1506 * {@link android.app.DevicePolicyManager} for working with global 1507 * device policy management. 1508 * 1509 * @see #getSystemService 1510 */ 1511 public static final String DEVICE_POLICY_SERVICE = "device_policy"; 1512 1513 /** 1514 * Determine whether the given permission is allowed for a particular 1515 * process and user ID running in the system. 1516 * 1517 * @param permission The name of the permission being checked. 1518 * @param pid The process ID being checked against. Must be > 0. 1519 * @param uid The user ID being checked against. A uid of 0 is the root 1520 * user, which will pass every permission check. 1521 * 1522 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the given 1523 * pid/uid is allowed that permission, or 1524 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1525 * 1526 * @see PackageManager#checkPermission(String, String) 1527 * @see #checkCallingPermission 1528 */ 1529 public abstract int checkPermission(String permission, int pid, int uid); 1530 1531 /** 1532 * Determine whether the calling process of an IPC you are handling has been 1533 * granted a particular permission. This is basically the same as calling 1534 * {@link #checkPermission(String, int, int)} with the pid and uid returned 1535 * by {@link android.os.Binder#getCallingPid} and 1536 * {@link android.os.Binder#getCallingUid}. One important difference 1537 * is that if you are not currently processing an IPC, this function 1538 * will always fail. This is done to protect against accidentally 1539 * leaking permissions; you can use {@link #checkCallingOrSelfPermission} 1540 * to avoid this protection. 1541 * 1542 * @param permission The name of the permission being checked. 1543 * 1544 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the calling 1545 * pid/uid is allowed that permission, or 1546 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1547 * 1548 * @see PackageManager#checkPermission(String, String) 1549 * @see #checkPermission 1550 * @see #checkCallingOrSelfPermission 1551 */ 1552 public abstract int checkCallingPermission(String permission); 1553 1554 /** 1555 * Determine whether the calling process of an IPC <em>or you</em> have been 1556 * granted a particular permission. This is the same as 1557 * {@link #checkCallingPermission}, except it grants your own permissions 1558 * if you are not currently processing an IPC. Use with care! 1559 * 1560 * @param permission The name of the permission being checked. 1561 * 1562 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the calling 1563 * pid/uid is allowed that permission, or 1564 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1565 * 1566 * @see PackageManager#checkPermission(String, String) 1567 * @see #checkPermission 1568 * @see #checkCallingPermission 1569 */ 1570 public abstract int checkCallingOrSelfPermission(String permission); 1571 1572 /** 1573 * If the given permission is not allowed for a particular process 1574 * and user ID running in the system, throw a {@link SecurityException}. 1575 * 1576 * @param permission The name of the permission being checked. 1577 * @param pid The process ID being checked against. Must be > 0. 1578 * @param uid The user ID being checked against. A uid of 0 is the root 1579 * user, which will pass every permission check. 1580 * @param message A message to include in the exception if it is thrown. 1581 * 1582 * @see #checkPermission(String, int, int) 1583 */ 1584 public abstract void enforcePermission( 1585 String permission, int pid, int uid, String message); 1586 1587 /** 1588 * If the calling process of an IPC you are handling has not been 1589 * granted a particular permission, throw a {@link 1590 * SecurityException}. This is basically the same as calling 1591 * {@link #enforcePermission(String, int, int, String)} with the 1592 * pid and uid returned by {@link android.os.Binder#getCallingPid} 1593 * and {@link android.os.Binder#getCallingUid}. One important 1594 * difference is that if you are not currently processing an IPC, 1595 * this function will always throw the SecurityException. This is 1596 * done to protect against accidentally leaking permissions; you 1597 * can use {@link #enforceCallingOrSelfPermission} to avoid this 1598 * protection. 1599 * 1600 * @param permission The name of the permission being checked. 1601 * @param message A message to include in the exception if it is thrown. 1602 * 1603 * @see #checkCallingPermission(String) 1604 */ 1605 public abstract void enforceCallingPermission( 1606 String permission, String message); 1607 1608 /** 1609 * If neither you nor the calling process of an IPC you are 1610 * handling has been granted a particular permission, throw a 1611 * {@link SecurityException}. This is the same as {@link 1612 * #enforceCallingPermission}, except it grants your own 1613 * permissions if you are not currently processing an IPC. Use 1614 * with care! 1615 * 1616 * @param permission The name of the permission being checked. 1617 * @param message A message to include in the exception if it is thrown. 1618 * 1619 * @see #checkCallingOrSelfPermission(String) 1620 */ 1621 public abstract void enforceCallingOrSelfPermission( 1622 String permission, String message); 1623 1624 /** 1625 * Grant permission to access a specific Uri to another package, regardless 1626 * of whether that package has general permission to access the Uri's 1627 * content provider. This can be used to grant specific, temporary 1628 * permissions, typically in response to user interaction (such as the 1629 * user opening an attachment that you would like someone else to 1630 * display). 1631 * 1632 * <p>Normally you should use {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 1633 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1634 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 1635 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} with the Intent being used to 1636 * start an activity instead of this function directly. If you use this 1637 * function directly, you should be sure to call 1638 * {@link #revokeUriPermission} when the target should no longer be allowed 1639 * to access it. 1640 * 1641 * <p>To succeed, the content provider owning the Uri must have set the 1642 * {@link android.R.styleable#AndroidManifestProvider_grantUriPermissions 1643 * grantUriPermissions} attribute in its manifest or included the 1644 * {@link android.R.styleable#AndroidManifestGrantUriPermission 1645 * <grant-uri-permissions>} tag. 1646 * 1647 * @param toPackage The package you would like to allow to access the Uri. 1648 * @param uri The Uri you would like to grant access to. 1649 * @param modeFlags The desired access modes. Any combination of 1650 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 1651 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1652 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 1653 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1654 * 1655 * @see #revokeUriPermission 1656 */ 1657 public abstract void grantUriPermission(String toPackage, Uri uri, 1658 int modeFlags); 1659 1660 /** 1661 * Remove all permissions to access a particular content provider Uri 1662 * that were previously added with {@link #grantUriPermission}. The given 1663 * Uri will match all previously granted Uris that are the same or a 1664 * sub-path of the given Uri. That is, revoking "content://foo/one" will 1665 * revoke both "content://foo/target" and "content://foo/target/sub", but not 1666 * "content://foo". 1667 * 1668 * @param uri The Uri you would like to revoke access to. 1669 * @param modeFlags The desired access modes. Any combination of 1670 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 1671 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1672 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 1673 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1674 * 1675 * @see #grantUriPermission 1676 */ 1677 public abstract void revokeUriPermission(Uri uri, int modeFlags); 1678 1679 /** 1680 * Determine whether a particular process and user ID has been granted 1681 * permission to access a specific URI. This only checks for permissions 1682 * that have been explicitly granted -- if the given process/uid has 1683 * more general access to the URI's content provider then this check will 1684 * always fail. 1685 * 1686 * @param uri The uri that is being checked. 1687 * @param pid The process ID being checked against. Must be > 0. 1688 * @param uid The user ID being checked against. A uid of 0 is the root 1689 * user, which will pass every permission check. 1690 * @param modeFlags The type of access to grant. May be one or both of 1691 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1692 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1693 * 1694 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the given 1695 * pid/uid is allowed to access that uri, or 1696 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1697 * 1698 * @see #checkCallingUriPermission 1699 */ 1700 public abstract int checkUriPermission(Uri uri, int pid, int uid, int modeFlags); 1701 1702 /** 1703 * Determine whether the calling process and user ID has been 1704 * granted permission to access a specific URI. This is basically 1705 * the same as calling {@link #checkUriPermission(Uri, int, int, 1706 * int)} with the pid and uid returned by {@link 1707 * android.os.Binder#getCallingPid} and {@link 1708 * android.os.Binder#getCallingUid}. One important difference is 1709 * that if you are not currently processing an IPC, this function 1710 * will always fail. 1711 * 1712 * @param uri The uri that is being checked. 1713 * @param modeFlags The type of access to grant. May be one or both of 1714 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1715 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1716 * 1717 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 1718 * is allowed to access that uri, or 1719 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1720 * 1721 * @see #checkUriPermission(Uri, int, int, int) 1722 */ 1723 public abstract int checkCallingUriPermission(Uri uri, int modeFlags); 1724 1725 /** 1726 * Determine whether the calling process of an IPC <em>or you</em> has been granted 1727 * permission to access a specific URI. This is the same as 1728 * {@link #checkCallingUriPermission}, except it grants your own permissions 1729 * if you are not currently processing an IPC. Use with care! 1730 * 1731 * @param uri The uri that is being checked. 1732 * @param modeFlags The type of access to grant. May be one or both of 1733 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1734 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1735 * 1736 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 1737 * is allowed to access that uri, or 1738 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1739 * 1740 * @see #checkCallingUriPermission 1741 */ 1742 public abstract int checkCallingOrSelfUriPermission(Uri uri, int modeFlags); 1743 1744 /** 1745 * Check both a Uri and normal permission. This allows you to perform 1746 * both {@link #checkPermission} and {@link #checkUriPermission} in one 1747 * call. 1748 * 1749 * @param uri The Uri whose permission is to be checked, or null to not 1750 * do this check. 1751 * @param readPermission The permission that provides overall read access, 1752 * or null to not do this check. 1753 * @param writePermission The permission that provides overall write 1754 * acess, or null to not do this check. 1755 * @param pid The process ID being checked against. Must be > 0. 1756 * @param uid The user ID being checked against. A uid of 0 is the root 1757 * user, which will pass every permission check. 1758 * @param modeFlags The type of access to grant. May be one or both of 1759 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1760 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1761 * 1762 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 1763 * is allowed to access that uri or holds one of the given permissions, or 1764 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1765 */ 1766 public abstract int checkUriPermission(Uri uri, String readPermission, 1767 String writePermission, int pid, int uid, int modeFlags); 1768 1769 /** 1770 * If a particular process and user ID has not been granted 1771 * permission to access a specific URI, throw {@link 1772 * SecurityException}. This only checks for permissions that have 1773 * been explicitly granted -- if the given process/uid has more 1774 * general access to the URI's content provider then this check 1775 * will always fail. 1776 * 1777 * @param uri The uri that is being checked. 1778 * @param pid The process ID being checked against. Must be > 0. 1779 * @param uid The user ID being checked against. A uid of 0 is the root 1780 * user, which will pass every permission check. 1781 * @param modeFlags The type of access to grant. May be one or both of 1782 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1783 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1784 * @param message A message to include in the exception if it is thrown. 1785 * 1786 * @see #checkUriPermission(Uri, int, int, int) 1787 */ 1788 public abstract void enforceUriPermission( 1789 Uri uri, int pid, int uid, int modeFlags, String message); 1790 1791 /** 1792 * If the calling process and user ID has not been granted 1793 * permission to access a specific URI, throw {@link 1794 * SecurityException}. This is basically the same as calling 1795 * {@link #enforceUriPermission(Uri, int, int, int, String)} with 1796 * the pid and uid returned by {@link 1797 * android.os.Binder#getCallingPid} and {@link 1798 * android.os.Binder#getCallingUid}. One important difference is 1799 * that if you are not currently processing an IPC, this function 1800 * will always throw a SecurityException. 1801 * 1802 * @param uri The uri that is being checked. 1803 * @param modeFlags The type of access to grant. May be one or both of 1804 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1805 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1806 * @param message A message to include in the exception if it is thrown. 1807 * 1808 * @see #checkCallingUriPermission(Uri, int) 1809 */ 1810 public abstract void enforceCallingUriPermission( 1811 Uri uri, int modeFlags, String message); 1812 1813 /** 1814 * If the calling process of an IPC <em>or you</em> has not been 1815 * granted permission to access a specific URI, throw {@link 1816 * SecurityException}. This is the same as {@link 1817 * #enforceCallingUriPermission}, except it grants your own 1818 * permissions if you are not currently processing an IPC. Use 1819 * with care! 1820 * 1821 * @param uri The uri that is being checked. 1822 * @param modeFlags The type of access to grant. May be one or both of 1823 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1824 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1825 * @param message A message to include in the exception if it is thrown. 1826 * 1827 * @see #checkCallingOrSelfUriPermission(Uri, int) 1828 */ 1829 public abstract void enforceCallingOrSelfUriPermission( 1830 Uri uri, int modeFlags, String message); 1831 1832 /** 1833 * Enforce both a Uri and normal permission. This allows you to perform 1834 * both {@link #enforcePermission} and {@link #enforceUriPermission} in one 1835 * call. 1836 * 1837 * @param uri The Uri whose permission is to be checked, or null to not 1838 * do this check. 1839 * @param readPermission The permission that provides overall read access, 1840 * or null to not do this check. 1841 * @param writePermission The permission that provides overall write 1842 * acess, or null to not do this check. 1843 * @param pid The process ID being checked against. Must be > 0. 1844 * @param uid The user ID being checked against. A uid of 0 is the root 1845 * user, which will pass every permission check. 1846 * @param modeFlags The type of access to grant. May be one or both of 1847 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1848 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1849 * @param message A message to include in the exception if it is thrown. 1850 * 1851 * @see #checkUriPermission(Uri, String, String, int, int, int) 1852 */ 1853 public abstract void enforceUriPermission( 1854 Uri uri, String readPermission, String writePermission, 1855 int pid, int uid, int modeFlags, String message); 1856 1857 /** 1858 * Flag for use with {@link #createPackageContext}: include the application 1859 * code with the context. This means loading code into the caller's 1860 * process, so that {@link #getClassLoader()} can be used to instantiate 1861 * the application's classes. Setting this flags imposes security 1862 * restrictions on what application context you can access; if the 1863 * requested application can not be safely loaded into your process, 1864 * java.lang.SecurityException will be thrown. If this flag is not set, 1865 * there will be no restrictions on the packages that can be loaded, 1866 * but {@link #getClassLoader} will always return the default system 1867 * class loader. 1868 */ 1869 public static final int CONTEXT_INCLUDE_CODE = 0x00000001; 1870 1871 /** 1872 * Flag for use with {@link #createPackageContext}: ignore any security 1873 * restrictions on the Context being requested, allowing it to always 1874 * be loaded. For use with {@link #CONTEXT_INCLUDE_CODE} to allow code 1875 * to be loaded into a process even when it isn't safe to do so. Use 1876 * with extreme care! 1877 */ 1878 public static final int CONTEXT_IGNORE_SECURITY = 0x00000002; 1879 1880 /** 1881 * Flag for use with {@link #createPackageContext}: a restricted context may 1882 * disable specific features. For instance, a View associated with a restricted 1883 * context would ignore particular XML attributes. 1884 */ 1885 public static final int CONTEXT_RESTRICTED = 0x00000004; 1886 1887 /** 1888 * Return a new Context object for the given application name. This 1889 * Context is the same as what the named application gets when it is 1890 * launched, containing the same resources and class loader. Each call to 1891 * this method returns a new instance of a Context object; Context objects 1892 * are not shared, however they share common state (Resources, ClassLoader, 1893 * etc) so the Context instance itself is fairly lightweight. 1894 * 1895 * <p>Throws {@link PackageManager.NameNotFoundException} if there is no 1896 * application with the given package name. 1897 * 1898 * <p>Throws {@link java.lang.SecurityException} if the Context requested 1899 * can not be loaded into the caller's process for security reasons (see 1900 * {@link #CONTEXT_INCLUDE_CODE} for more information}. 1901 * 1902 * @param packageName Name of the application's package. 1903 * @param flags Option flags, one of {@link #CONTEXT_INCLUDE_CODE} 1904 * or {@link #CONTEXT_IGNORE_SECURITY}. 1905 * 1906 * @return A Context for the application. 1907 * 1908 * @throws java.lang.SecurityException 1909 * @throws PackageManager.NameNotFoundException if there is no application with 1910 * the given package name 1911 */ 1912 public abstract Context createPackageContext(String packageName, 1913 int flags) throws PackageManager.NameNotFoundException; 1914 1915 /** 1916 * Indicates whether this Context is restricted. 1917 * 1918 * @return True if this Context is restricted, false otherwise. 1919 * 1920 * @see #CONTEXT_RESTRICTED 1921 */ 1922 public boolean isRestricted() { 1923 return false; 1924 } 1925} 1926