Context.java revision 46be2a5bb647a2429c16ce7d613dd9cce8c3c43b
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.net.Uri; 29import android.os.Bundle; 30import android.os.Handler; 31import android.os.Looper; 32import android.util.AttributeSet; 33 34import java.io.File; 35import java.io.FileInputStream; 36import java.io.FileNotFoundException; 37import java.io.FileOutputStream; 38import java.io.IOException; 39import java.io.InputStream; 40 41/** 42 * Interface to global information about an application environment. This is 43 * an abstract class whose implementation is provided by 44 * the Android system. It 45 * allows access to application-specific resources and classes, as well as 46 * up-calls for application-level operations such as launching activities, 47 * broadcasting and receiving intents, etc. 48 */ 49public abstract class Context { 50 /** 51 * File creation mode: the default mode, where the created file can only 52 * be accessed by the calling application (or all applications sharing the 53 * same user ID). 54 * @see #MODE_WORLD_READABLE 55 * @see #MODE_WORLD_WRITEABLE 56 */ 57 public static final int MODE_PRIVATE = 0x0000; 58 /** 59 * File creation mode: allow all other applications to have read access 60 * to the created file. 61 * @see #MODE_PRIVATE 62 * @see #MODE_WORLD_WRITEABLE 63 */ 64 public static final int MODE_WORLD_READABLE = 0x0001; 65 /** 66 * File creation mode: allow all other applications to have write access 67 * to the created file. 68 * @see #MODE_PRIVATE 69 * @see #MODE_WORLD_READABLE 70 */ 71 public static final int MODE_WORLD_WRITEABLE = 0x0002; 72 /** 73 * File creation mode: for use with {@link #openFileOutput}, if the file 74 * already exists then write data to the end of the existing file 75 * instead of erasing it. 76 * @see #openFileOutput 77 */ 78 public static final int MODE_APPEND = 0x8000; 79 80 /** 81 * Flag for {@link #bindService}: automatically create the service as long 82 * as the binding exists. Note that while this will create the service, 83 * its {@link android.app.Service#onStart} method will still only be called due to an 84 * explicit call to {@link #startService}. Even without that, though, 85 * this still provides you with access to the service object while the 86 * service is created. 87 * 88 * <p>Specifying this flag also tells the system to treat the service 89 * as being as important as your own process -- that is, when deciding 90 * which process should be killed to free memory, the service will only 91 * be considered a candidate as long as the processes of any such bindings 92 * is also a candidate to be killed. This is to avoid situations where 93 * the service is being continually created and killed due to low memory. 94 */ 95 public static final int BIND_AUTO_CREATE = 0x0001; 96 97 /** 98 * Flag for {@link #bindService}: include debugging help for mismatched 99 * calls to unbind. When this flag is set, the callstack of the following 100 * {@link #unbindService} call is retained, to be printed if a later 101 * incorrect unbind call is made. Note that doing this requires retaining 102 * information about the binding that was made for the lifetime of the app, 103 * resulting in a leak -- this should only be used for debugging. 104 */ 105 public static final int BIND_DEBUG_UNBIND = 0x0002; 106 107 /** 108 * Flag for {@link #bindService}: don't allow this binding to raise 109 * the target service's process to the foreground scheduling priority. 110 * It will still be raised to the at least the same memory priority 111 * as the client (so that its process will not be killable in any 112 * situation where the client is not killable), but for CPU scheduling 113 * purposes it may be left in the background. This only has an impact 114 * in the situation where the binding client is a foreground process 115 * and the target service is in a background process. 116 */ 117 public static final int BIND_NOT_FOREGROUND = 0x0004; 118 119 /** Return an AssetManager instance for your application's package. */ 120 public abstract AssetManager getAssets(); 121 122 /** Return a Resources instance for your application's package. */ 123 public abstract Resources getResources(); 124 125 /** Return PackageManager instance to find global package information. */ 126 public abstract PackageManager getPackageManager(); 127 128 /** Return a ContentResolver instance for your application's package. */ 129 public abstract ContentResolver getContentResolver(); 130 131 /** 132 * Return the Looper for the main thread of the current process. This is 133 * the thread used to dispatch calls to application components (activities, 134 * services, etc). 135 */ 136 public abstract Looper getMainLooper(); 137 138 /** 139 * Return the context of the single, global Application object of the 140 * current process. This generally should only be used if you need a 141 * Context whose lifecycle is separate from the current context, that is 142 * tied to the lifetime of the process rather than the current component. 143 * 144 * <p>Consider for example how this interacts with 145 * {@ #registerReceiver(BroadcastReceiver, IntentFilter)}: 146 * <ul> 147 * <li> <p>If used from an Activity context, the receiver is being registered 148 * within that activity. This means that you are expected to unregister 149 * before the activity is done being destroyed; in fact if you do not do 150 * so, the framework will clean up your leaked registration as it removes 151 * the activity and log an error. Thus, if you use the Activity context 152 * to register a receiver that is static (global to the process, not 153 * associated with an Activity instance) then that registration will be 154 * removed on you at whatever point the activity you used is destroyed. 155 * <li> <p>If used from the Context returned here, the receiver is being 156 * registered with the global state associated with your application. Thus 157 * it will never be unregistered for you. This is necessary if the receiver 158 * is associated with static data, not a particular component. However 159 * using the ApplicationContext elsewhere can easily lead to serious leaks 160 * if you forget to unregister, unbind, etc. 161 * </ul> 162 */ 163 public abstract Context getApplicationContext(); 164 165 /** 166 * Return a localized, styled CharSequence from the application's package's 167 * default string table. 168 * 169 * @param resId Resource id for the CharSequence text 170 */ 171 public final CharSequence getText(int resId) { 172 return getResources().getText(resId); 173 } 174 175 /** 176 * Return a localized string from the application's package's 177 * default string table. 178 * 179 * @param resId Resource id for the string 180 */ 181 public final String getString(int resId) { 182 return getResources().getString(resId); 183 } 184 185 /** 186 * Return a localized formatted string from the application's package's 187 * default string table, substituting the format arguments as defined in 188 * {@link java.util.Formatter} and {@link java.lang.String#format}. 189 * 190 * @param resId Resource id for the format string 191 * @param formatArgs The format arguments that will be used for substitution. 192 */ 193 194 public final String getString(int resId, Object... formatArgs) { 195 return getResources().getString(resId, formatArgs); 196 } 197 198 /** 199 * Set the base theme for this context. Note that this should be called 200 * before any views are instantiated in the Context (for example before 201 * calling {@link android.app.Activity#setContentView} or 202 * {@link android.view.LayoutInflater#inflate}). 203 * 204 * @param resid The style resource describing the theme. 205 */ 206 public abstract void setTheme(int resid); 207 208 /** 209 * Return the Theme object associated with this Context. 210 */ 211 public abstract Resources.Theme getTheme(); 212 213 /** 214 * Retrieve styled attribute information in this Context's theme. See 215 * {@link Resources.Theme#obtainStyledAttributes(int[])} 216 * for more information. 217 * 218 * @see Resources.Theme#obtainStyledAttributes(int[]) 219 */ 220 public final TypedArray obtainStyledAttributes( 221 int[] attrs) { 222 return getTheme().obtainStyledAttributes(attrs); 223 } 224 225 /** 226 * Retrieve styled attribute information in this Context's theme. See 227 * {@link Resources.Theme#obtainStyledAttributes(int, int[])} 228 * for more information. 229 * 230 * @see Resources.Theme#obtainStyledAttributes(int, int[]) 231 */ 232 public final TypedArray obtainStyledAttributes( 233 int resid, int[] attrs) throws Resources.NotFoundException { 234 return getTheme().obtainStyledAttributes(resid, attrs); 235 } 236 237 /** 238 * Retrieve styled attribute information in this Context's theme. See 239 * {@link Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)} 240 * for more information. 241 * 242 * @see Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 243 */ 244 public final TypedArray obtainStyledAttributes( 245 AttributeSet set, int[] attrs) { 246 return getTheme().obtainStyledAttributes(set, attrs, 0, 0); 247 } 248 249 /** 250 * Retrieve styled attribute information in this Context's theme. See 251 * {@link Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)} 252 * for more information. 253 * 254 * @see Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 255 */ 256 public final TypedArray obtainStyledAttributes( 257 AttributeSet set, int[] attrs, int defStyleAttr, int defStyleRes) { 258 return getTheme().obtainStyledAttributes( 259 set, attrs, defStyleAttr, defStyleRes); 260 } 261 262 /** 263 * Return a class loader you can use to retrieve classes in this package. 264 */ 265 public abstract ClassLoader getClassLoader(); 266 267 /** Return the name of this application's package. */ 268 public abstract String getPackageName(); 269 270 /** Return the full application info for this context's package. */ 271 public abstract ApplicationInfo getApplicationInfo(); 272 273 /** 274 * Return the full path to this context's primary Android package. 275 * The Android package is a ZIP file which contains the application's 276 * primary resources. 277 * 278 * <p>Note: this is not generally useful for applications, since they should 279 * not be directly accessing the file system. 280 * 281 * @return String Path to the resources. 282 */ 283 public abstract String getPackageResourcePath(); 284 285 /** 286 * Return the full path to this context's primary Android package. 287 * The Android package is a ZIP file which contains application's 288 * primary code and assets. 289 * 290 * <p>Note: this is not generally useful for applications, since they should 291 * not be directly accessing the file system. 292 * 293 * @return String Path to the code and assets. 294 */ 295 public abstract String getPackageCodePath(); 296 297 /** 298 * {@hide} 299 * Return the full path to the shared prefs file for the given prefs group name. 300 * 301 * <p>Note: this is not generally useful for applications, since they should 302 * not be directly accessing the file system. 303 */ 304 public abstract File getSharedPrefsFile(String name); 305 306 /** 307 * Retrieve and hold the contents of the preferences file 'name', returning 308 * a SharedPreferences through which you can retrieve and modify its 309 * values. Only one instance of the SharedPreferences object is returned 310 * to any callers for the same name, meaning they will see each other's 311 * edits as soon as they are made. 312 * 313 * @param name Desired preferences file. If a preferences file by this name 314 * does not exist, it will be created when you retrieve an 315 * editor (SharedPreferences.edit()) and then commit changes (Editor.commit()). 316 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 317 * default operation, {@link #MODE_WORLD_READABLE} 318 * and {@link #MODE_WORLD_WRITEABLE} to control permissions. 319 * 320 * @return Returns the single SharedPreferences instance that can be used 321 * to retrieve and modify the preference values. 322 * 323 * @see #MODE_PRIVATE 324 * @see #MODE_WORLD_READABLE 325 * @see #MODE_WORLD_WRITEABLE 326 */ 327 public abstract SharedPreferences getSharedPreferences(String name, 328 int mode); 329 330 /** 331 * Open a private file associated with this Context's application package 332 * for reading. 333 * 334 * @param name The name of the file to open; can not contain path 335 * separators. 336 * 337 * @return FileInputStream Resulting input stream. 338 * 339 * @see #openFileOutput 340 * @see #fileList 341 * @see #deleteFile 342 * @see java.io.FileInputStream#FileInputStream(String) 343 */ 344 public abstract FileInputStream openFileInput(String name) 345 throws FileNotFoundException; 346 347 /** 348 * Open a private file associated with this Context's application package 349 * for writing. Creates the file if it doesn't already exist. 350 * 351 * @param name The name of the file to open; can not contain path 352 * separators. 353 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 354 * default operation, {@link #MODE_APPEND} to append to an existing file, 355 * {@link #MODE_WORLD_READABLE} and {@link #MODE_WORLD_WRITEABLE} to control 356 * permissions. 357 * 358 * @return FileOutputStream Resulting output stream. 359 * 360 * @see #MODE_APPEND 361 * @see #MODE_PRIVATE 362 * @see #MODE_WORLD_READABLE 363 * @see #MODE_WORLD_WRITEABLE 364 * @see #openFileInput 365 * @see #fileList 366 * @see #deleteFile 367 * @see java.io.FileOutputStream#FileOutputStream(String) 368 */ 369 public abstract FileOutputStream openFileOutput(String name, int mode) 370 throws FileNotFoundException; 371 372 /** 373 * Delete the given private file associated with this Context's 374 * application package. 375 * 376 * @param name The name of the file to delete; can not contain path 377 * separators. 378 * 379 * @return True if the file was successfully deleted; else 380 * false. 381 * 382 * @see #openFileInput 383 * @see #openFileOutput 384 * @see #fileList 385 * @see java.io.File#delete() 386 */ 387 public abstract boolean deleteFile(String name); 388 389 /** 390 * Returns the absolute path on the filesystem where a file created with 391 * {@link #openFileOutput} is stored. 392 * 393 * @param name The name of the file for which you would like to get 394 * its path. 395 * 396 * @return Returns an absolute path to the given file. 397 * 398 * @see #openFileOutput 399 * @see #getFilesDir 400 * @see #getDir 401 */ 402 public abstract File getFileStreamPath(String name); 403 404 /** 405 * Returns the absolute path to the directory on the filesystem where 406 * files created with {@link #openFileOutput} are stored. 407 * 408 * @return Returns the path of the directory holding application files. 409 * 410 * @see #openFileOutput 411 * @see #getFileStreamPath 412 * @see #getDir 413 */ 414 public abstract File getFilesDir(); 415 416 /** 417 * Returns the absolute path to the directory on the external filesystem 418 * (that is somewhere on {@link android.os.Environment#getExternalStorageDirectory() 419 * Environment.getExternalStorageDirectory()}) where the application can 420 * place persistent files it owns. These files are private to the 421 * applications, and not typically visible to the user as media. 422 * 423 * <p>This is like {@link #getFilesDir()} in that these 424 * files will be deleted when the application is uninstalled, however there 425 * are some important differences: 426 * 427 * <ul> 428 * <li>External files are not always available: they will disappear if the 429 * user mounts the external storage on a computer or removes it. See the 430 * APIs on {@link android.os.Environment} for information in the storage state. 431 * <li>There is no security enforced with these files. All applications 432 * can read and write files placed here. 433 * </ul> 434 * 435 * <p>Here is an example of typical code to manipulate a file in 436 * an application's private storage:</p> 437 * 438 * {@sample development/samples/ApiDemos/src/com/example/android/apis/content/ExternalStorage.java 439 * private_file} 440 * 441 * <p>If you supply a non-null <var>type</var> to this function, the returned 442 * file will be a path to a sub-directory of the given type. Though these files 443 * are not automatically scanned by the media scanner, you can explicitly 444 * add them to the media database with 445 * {@link android.media.MediaScannerConnection#scanFile(Context, String[], String[], 446 * OnScanCompletedListener) MediaScannerConnection.scanFile}. 447 * Note that this is not the same as 448 * {@link android.os.Environment#getExternalStoragePublicDirectory 449 * Environment.getExternalStoragePublicDirectory()}, which provides 450 * directories of media shared by all applications. The 451 * directories returned here are 452 * owned by the application, and their contents will be removed when the 453 * application is uninstalled. Unlike 454 * {@link android.os.Environment#getExternalStoragePublicDirectory 455 * Environment.getExternalStoragePublicDirectory()}, the directory 456 * returned here will be automatically created for you. 457 * 458 * <p>Here is an example of typical code to manipulate a picture in 459 * an application's private storage and add it to the media database:</p> 460 * 461 * {@sample development/samples/ApiDemos/src/com/example/android/apis/content/ExternalStorage.java 462 * private_picture} 463 * 464 * @param type The type of files directory to return. May be null for 465 * the root of the files directory or one of 466 * the following Environment constants for a subdirectory: 467 * {@link android.os.Environment#DIRECTORY_MUSIC}, 468 * {@link android.os.Environment#DIRECTORY_PODCASTS}, 469 * {@link android.os.Environment#DIRECTORY_RINGTONES}, 470 * {@link android.os.Environment#DIRECTORY_ALARMS}, 471 * {@link android.os.Environment#DIRECTORY_NOTIFICATIONS}, 472 * {@link android.os.Environment#DIRECTORY_PICTURES}, or 473 * {@link android.os.Environment#DIRECTORY_MOVIES}. 474 * 475 * @return Returns the path of the directory holding application files 476 * on external storage. Returns null if external storage is not currently 477 * mounted so it could not ensure the path exists; you will need to call 478 * this method again when it is available. 479 * 480 * @see #getFilesDir 481 * @see android.os.Environment#getExternalStoragePublicDirectory 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 * <dt> {@link #UI_MODE_SERVICE} ("uimode") 1208 * <dd> An {@link android.app.UiModeManager} for controlling UI modes. 1209 * </dl> 1210 * 1211 * <p>Note: System services obtained via this API may be closely associated with 1212 * the Context in which they are obtained from. In general, do not share the 1213 * service objects between various different contexts (Activities, Applications, 1214 * Services, Providers, etc.) 1215 * 1216 * @param name The name of the desired service. 1217 * 1218 * @return The service or null if the name does not exist. 1219 * 1220 * @see #WINDOW_SERVICE 1221 * @see android.view.WindowManager 1222 * @see #LAYOUT_INFLATER_SERVICE 1223 * @see android.view.LayoutInflater 1224 * @see #ACTIVITY_SERVICE 1225 * @see android.app.ActivityManager 1226 * @see #POWER_SERVICE 1227 * @see android.os.PowerManager 1228 * @see #ALARM_SERVICE 1229 * @see android.app.AlarmManager 1230 * @see #NOTIFICATION_SERVICE 1231 * @see android.app.NotificationManager 1232 * @see #KEYGUARD_SERVICE 1233 * @see android.app.KeyguardManager 1234 * @see #LOCATION_SERVICE 1235 * @see android.location.LocationManager 1236 * @see #SEARCH_SERVICE 1237 * @see android.app.SearchManager 1238 * @see #SENSOR_SERVICE 1239 * @see android.hardware.SensorManager 1240 * @see #STORAGE_SERVICE 1241 * @see android.os.storage.StorageManager 1242 * @see #VIBRATOR_SERVICE 1243 * @see android.os.Vibrator 1244 * @see #CONNECTIVITY_SERVICE 1245 * @see android.net.ConnectivityManager 1246 * @see #WIFI_SERVICE 1247 * @see android.net.wifi.WifiManager 1248 * @see #AUDIO_SERVICE 1249 * @see android.media.AudioManager 1250 * @see #TELEPHONY_SERVICE 1251 * @see android.telephony.TelephonyManager 1252 * @see #INPUT_METHOD_SERVICE 1253 * @see android.view.inputmethod.InputMethodManager 1254 * @see #UI_MODE_SERVICE 1255 * @see android.app.UiModeManager 1256 */ 1257 public abstract Object getSystemService(String name); 1258 1259 /** 1260 * Use with {@link #getSystemService} to retrieve a 1261 * {@link android.os.PowerManager} for controlling power management, 1262 * including "wake locks," which let you keep the device on while 1263 * you're running long tasks. 1264 */ 1265 public static final String POWER_SERVICE = "power"; 1266 1267 /** 1268 * Use with {@link #getSystemService} to retrieve a 1269 * {@link android.view.WindowManager} for accessing the system's window 1270 * manager. 1271 * 1272 * @see #getSystemService 1273 * @see android.view.WindowManager 1274 */ 1275 public static final String WINDOW_SERVICE = "window"; 1276 1277 /** 1278 * Use with {@link #getSystemService} to retrieve a 1279 * {@link android.view.LayoutInflater} for inflating layout resources in this 1280 * context. 1281 * 1282 * @see #getSystemService 1283 * @see android.view.LayoutInflater 1284 */ 1285 public static final String LAYOUT_INFLATER_SERVICE = "layout_inflater"; 1286 1287 /** 1288 * Use with {@link #getSystemService} to retrieve a 1289 * {@link android.accounts.AccountManager} for receiving intents at a 1290 * time of your choosing. 1291 * 1292 * @see #getSystemService 1293 * @see android.accounts.AccountManager 1294 */ 1295 public static final String ACCOUNT_SERVICE = "account"; 1296 1297 /** 1298 * Use with {@link #getSystemService} to retrieve a 1299 * {@link android.app.ActivityManager} for interacting with the global 1300 * system state. 1301 * 1302 * @see #getSystemService 1303 * @see android.app.ActivityManager 1304 */ 1305 public static final String ACTIVITY_SERVICE = "activity"; 1306 1307 /** 1308 * Use with {@link #getSystemService} to retrieve a 1309 * {@link android.app.AlarmManager} for receiving intents at a 1310 * time of your choosing. 1311 * 1312 * @see #getSystemService 1313 * @see android.app.AlarmManager 1314 */ 1315 public static final String ALARM_SERVICE = "alarm"; 1316 1317 /** 1318 * Use with {@link #getSystemService} to retrieve a 1319 * {@link android.app.NotificationManager} for informing the user of 1320 * background events. 1321 * 1322 * @see #getSystemService 1323 * @see android.app.NotificationManager 1324 */ 1325 public static final String NOTIFICATION_SERVICE = "notification"; 1326 1327 /** 1328 * Use with {@link #getSystemService} to retrieve a 1329 * {@link android.view.accessibility.AccessibilityManager} for giving the user 1330 * feedback for UI events through the registered event listeners. 1331 * 1332 * @see #getSystemService 1333 * @see android.view.accessibility.AccessibilityManager 1334 */ 1335 public static final String ACCESSIBILITY_SERVICE = "accessibility"; 1336 1337 /** 1338 * Use with {@link #getSystemService} to retrieve a 1339 * {@link android.app.NotificationManager} for controlling keyguard. 1340 * 1341 * @see #getSystemService 1342 * @see android.app.KeyguardManager 1343 */ 1344 public static final String KEYGUARD_SERVICE = "keyguard"; 1345 1346 /** 1347 * Use with {@link #getSystemService} to retrieve a {@link 1348 * android.location.LocationManager} for controlling location 1349 * updates. 1350 * 1351 * @see #getSystemService 1352 * @see android.location.LocationManager 1353 */ 1354 public static final String LOCATION_SERVICE = "location"; 1355 1356 /** 1357 * Use with {@link #getSystemService} to retrieve a {@link 1358 * android.app.SearchManager} for handling searches. 1359 * 1360 * @see #getSystemService 1361 * @see android.app.SearchManager 1362 */ 1363 public static final String SEARCH_SERVICE = "search"; 1364 1365 /** 1366 * Use with {@link #getSystemService} to retrieve a {@link 1367 * android.hardware.SensorManager} for accessing sensors. 1368 * 1369 * @see #getSystemService 1370 * @see android.hardware.SensorManager 1371 */ 1372 public static final String SENSOR_SERVICE = "sensor"; 1373 1374 /** 1375 * Use with {@link #getSystemService} to retrieve a {@link 1376 * android.os.storage.StorageManager} for accessing system storage 1377 * functions. 1378 * 1379 * @see #getSystemService 1380 * @see android.os.storage.StorageManager 1381 */ 1382 public static final String STORAGE_SERVICE = "storage"; 1383 1384 /** 1385 * Use with {@link #getSystemService} to retrieve a 1386 * com.android.server.WallpaperService for accessing wallpapers. 1387 * 1388 * @see #getSystemService 1389 */ 1390 public static final String WALLPAPER_SERVICE = "wallpaper"; 1391 1392 /** 1393 * Use with {@link #getSystemService} to retrieve a {@link 1394 * android.os.Vibrator} for interacting with the vibration hardware. 1395 * 1396 * @see #getSystemService 1397 * @see android.os.Vibrator 1398 */ 1399 public static final String VIBRATOR_SERVICE = "vibrator"; 1400 1401 /** 1402 * Use with {@link #getSystemService} to retrieve a {@link 1403 * android.app.StatusBarManager} for interacting with the status bar. 1404 * 1405 * @see #getSystemService 1406 * @see android.app.StatusBarManager 1407 * @hide 1408 */ 1409 public static final String STATUS_BAR_SERVICE = "statusbar"; 1410 1411 /** 1412 * Use with {@link #getSystemService} to retrieve a {@link 1413 * android.net.ConnectivityManager} for handling management of 1414 * network connections. 1415 * 1416 * @see #getSystemService 1417 * @see android.net.ConnectivityManager 1418 */ 1419 public static final String CONNECTIVITY_SERVICE = "connectivity"; 1420 1421 /** 1422 * Use with {@link #getSystemService} to retrieve a {@link 1423 * android.net.ThrottleManager} for handling management of 1424 * throttling. 1425 * 1426 * @hide 1427 * @see #getSystemService 1428 * @see android.net.ThrottleManager 1429 */ 1430 public static final String THROTTLE_SERVICE = "throttle"; 1431 1432 /** 1433 * Use with {@link #getSystemService} to retrieve a {@link 1434 * android.net.NetworkManagementService} for handling management of 1435 * system network services 1436 * 1437 * @hide 1438 * @see #getSystemService 1439 * @see android.net.NetworkManagementService 1440 */ 1441 public static final String NETWORKMANAGEMENT_SERVICE = "network_management"; 1442 1443 /** 1444 * Use with {@link #getSystemService} to retrieve a {@link 1445 * android.net.wifi.WifiManager} for handling management of 1446 * Wi-Fi access. 1447 * 1448 * @see #getSystemService 1449 * @see android.net.wifi.WifiManager 1450 */ 1451 public static final String WIFI_SERVICE = "wifi"; 1452 1453 /** 1454 * Use with {@link #getSystemService} to retrieve a 1455 * {@link android.media.AudioManager} for handling management of volume, 1456 * ringer modes and audio routing. 1457 * 1458 * @see #getSystemService 1459 * @see android.media.AudioManager 1460 */ 1461 public static final String AUDIO_SERVICE = "audio"; 1462 1463 /** 1464 * Use with {@link #getSystemService} to retrieve a 1465 * {@link android.telephony.TelephonyManager} for handling management the 1466 * telephony features of the device. 1467 * 1468 * @see #getSystemService 1469 * @see android.telephony.TelephonyManager 1470 */ 1471 public static final String TELEPHONY_SERVICE = "phone"; 1472 1473 /** 1474 * Use with {@link #getSystemService} to retrieve a 1475 * {@link android.text.ClipboardManager} for accessing and modifying 1476 * the contents of the global clipboard. 1477 * 1478 * @see #getSystemService 1479 * @see android.text.ClipboardManager 1480 */ 1481 public static final String CLIPBOARD_SERVICE = "clipboard"; 1482 1483 /** 1484 * Use with {@link #getSystemService} to retrieve a 1485 * {@link android.view.inputmethod.InputMethodManager} for accessing input 1486 * methods. 1487 * 1488 * @see #getSystemService 1489 */ 1490 public static final String INPUT_METHOD_SERVICE = "input_method"; 1491 1492 /** 1493 * Use with {@link #getSystemService} to retrieve a 1494 * {@link android.appwidget.AppWidgetManager} for accessing AppWidgets. 1495 * 1496 * @hide 1497 * @see #getSystemService 1498 */ 1499 public static final String APPWIDGET_SERVICE = "appwidget"; 1500 1501 /** 1502 * Use with {@link #getSystemService} to retrieve an 1503 * {@link android.app.backup.IBackupManager IBackupManager} for communicating 1504 * with the backup mechanism. 1505 * @hide 1506 * 1507 * @see #getSystemService 1508 */ 1509 public static final String BACKUP_SERVICE = "backup"; 1510 1511 /** 1512 * Use with {@link #getSystemService} to retrieve a 1513 * {@link android.os.DropBoxManager} instance for recording 1514 * diagnostic logs. 1515 * @see #getSystemService 1516 */ 1517 public static final String DROPBOX_SERVICE = "dropbox"; 1518 1519 /** 1520 * Use with {@link #getSystemService} to retrieve a 1521 * {@link android.app.admin.DevicePolicyManager} for working with global 1522 * device policy management. 1523 * 1524 * @see #getSystemService 1525 */ 1526 public static final String DEVICE_POLICY_SERVICE = "device_policy"; 1527 1528 /** 1529 * Use with {@link #getSystemService} to retrieve a 1530 * {@link android.app.UiModeManager} for controlling UI modes. 1531 * 1532 * @see #getSystemService 1533 */ 1534 public static final String UI_MODE_SERVICE = "uimode"; 1535 1536 /** 1537 * Use with {@link #getSystemService} to retrieve a 1538 * {@link android.net.DownloadManager} for requesting HTTP downloads. 1539 * 1540 * @see #getSystemService 1541 */ 1542 public static final String DOWNLOAD_SERVICE = "download"; 1543 1544 /** 1545 * Determine whether the given permission is allowed for a particular 1546 * process and user ID running in the system. 1547 * 1548 * @param permission The name of the permission being checked. 1549 * @param pid The process ID being checked against. Must be > 0. 1550 * @param uid The user ID being checked against. A uid of 0 is the root 1551 * user, which will pass every permission check. 1552 * 1553 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the given 1554 * pid/uid is allowed that permission, or 1555 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1556 * 1557 * @see PackageManager#checkPermission(String, String) 1558 * @see #checkCallingPermission 1559 */ 1560 public abstract int checkPermission(String permission, int pid, int uid); 1561 1562 /** 1563 * Determine whether the calling process of an IPC you are handling has been 1564 * granted a particular permission. This is basically the same as calling 1565 * {@link #checkPermission(String, int, int)} with the pid and uid returned 1566 * by {@link android.os.Binder#getCallingPid} and 1567 * {@link android.os.Binder#getCallingUid}. One important difference 1568 * is that if you are not currently processing an IPC, this function 1569 * will always fail. This is done to protect against accidentally 1570 * leaking permissions; you can use {@link #checkCallingOrSelfPermission} 1571 * to avoid this protection. 1572 * 1573 * @param permission The name of the permission being checked. 1574 * 1575 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the calling 1576 * pid/uid is allowed that permission, or 1577 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1578 * 1579 * @see PackageManager#checkPermission(String, String) 1580 * @see #checkPermission 1581 * @see #checkCallingOrSelfPermission 1582 */ 1583 public abstract int checkCallingPermission(String permission); 1584 1585 /** 1586 * Determine whether the calling process of an IPC <em>or you</em> have been 1587 * granted a particular permission. This is the same as 1588 * {@link #checkCallingPermission}, except it grants your own permissions 1589 * if you are not currently processing an IPC. Use with care! 1590 * 1591 * @param permission The name of the permission being checked. 1592 * 1593 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the calling 1594 * pid/uid is allowed that permission, or 1595 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1596 * 1597 * @see PackageManager#checkPermission(String, String) 1598 * @see #checkPermission 1599 * @see #checkCallingPermission 1600 */ 1601 public abstract int checkCallingOrSelfPermission(String permission); 1602 1603 /** 1604 * If the given permission is not allowed for a particular process 1605 * and user ID running in the system, throw a {@link SecurityException}. 1606 * 1607 * @param permission The name of the permission being checked. 1608 * @param pid The process ID being checked against. Must be > 0. 1609 * @param uid The user ID being checked against. A uid of 0 is the root 1610 * user, which will pass every permission check. 1611 * @param message A message to include in the exception if it is thrown. 1612 * 1613 * @see #checkPermission(String, int, int) 1614 */ 1615 public abstract void enforcePermission( 1616 String permission, int pid, int uid, String message); 1617 1618 /** 1619 * If the calling process of an IPC you are handling has not been 1620 * granted a particular permission, throw a {@link 1621 * SecurityException}. This is basically the same as calling 1622 * {@link #enforcePermission(String, int, int, String)} with the 1623 * pid and uid returned by {@link android.os.Binder#getCallingPid} 1624 * and {@link android.os.Binder#getCallingUid}. One important 1625 * difference is that if you are not currently processing an IPC, 1626 * this function will always throw the SecurityException. This is 1627 * done to protect against accidentally leaking permissions; you 1628 * can use {@link #enforceCallingOrSelfPermission} to avoid this 1629 * protection. 1630 * 1631 * @param permission The name of the permission being checked. 1632 * @param message A message to include in the exception if it is thrown. 1633 * 1634 * @see #checkCallingPermission(String) 1635 */ 1636 public abstract void enforceCallingPermission( 1637 String permission, String message); 1638 1639 /** 1640 * If neither you nor the calling process of an IPC you are 1641 * handling has been granted a particular permission, throw a 1642 * {@link SecurityException}. This is the same as {@link 1643 * #enforceCallingPermission}, except it grants your own 1644 * permissions if you are not currently processing an IPC. Use 1645 * with care! 1646 * 1647 * @param permission The name of the permission being checked. 1648 * @param message A message to include in the exception if it is thrown. 1649 * 1650 * @see #checkCallingOrSelfPermission(String) 1651 */ 1652 public abstract void enforceCallingOrSelfPermission( 1653 String permission, String message); 1654 1655 /** 1656 * Grant permission to access a specific Uri to another package, regardless 1657 * of whether that package has general permission to access the Uri's 1658 * content provider. This can be used to grant specific, temporary 1659 * permissions, typically in response to user interaction (such as the 1660 * user opening an attachment that you would like someone else to 1661 * display). 1662 * 1663 * <p>Normally you should use {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 1664 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1665 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 1666 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} with the Intent being used to 1667 * start an activity instead of this function directly. If you use this 1668 * function directly, you should be sure to call 1669 * {@link #revokeUriPermission} when the target should no longer be allowed 1670 * to access it. 1671 * 1672 * <p>To succeed, the content provider owning the Uri must have set the 1673 * {@link android.R.styleable#AndroidManifestProvider_grantUriPermissions 1674 * grantUriPermissions} attribute in its manifest or included the 1675 * {@link android.R.styleable#AndroidManifestGrantUriPermission 1676 * <grant-uri-permissions>} tag. 1677 * 1678 * @param toPackage The package you would like to allow to access the Uri. 1679 * @param uri The Uri you would like to grant access to. 1680 * @param modeFlags The desired access modes. Any combination of 1681 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 1682 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1683 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 1684 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1685 * 1686 * @see #revokeUriPermission 1687 */ 1688 public abstract void grantUriPermission(String toPackage, Uri uri, 1689 int modeFlags); 1690 1691 /** 1692 * Remove all permissions to access a particular content provider Uri 1693 * that were previously added with {@link #grantUriPermission}. The given 1694 * Uri will match all previously granted Uris that are the same or a 1695 * sub-path of the given Uri. That is, revoking "content://foo/one" will 1696 * revoke both "content://foo/target" and "content://foo/target/sub", but not 1697 * "content://foo". 1698 * 1699 * @param uri The Uri you would like to revoke access to. 1700 * @param modeFlags The desired access modes. Any combination of 1701 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 1702 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1703 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 1704 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1705 * 1706 * @see #grantUriPermission 1707 */ 1708 public abstract void revokeUriPermission(Uri uri, int modeFlags); 1709 1710 /** 1711 * Determine whether a particular process and user ID has been granted 1712 * permission to access a specific URI. This only checks for permissions 1713 * that have been explicitly granted -- if the given process/uid has 1714 * more general access to the URI's content provider then this check will 1715 * always fail. 1716 * 1717 * @param uri The uri that is being checked. 1718 * @param pid The process ID being checked against. Must be > 0. 1719 * @param uid The user ID being checked against. A uid of 0 is the root 1720 * user, which will pass every permission check. 1721 * @param modeFlags The type of access to grant. May be one or both of 1722 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1723 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1724 * 1725 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the given 1726 * pid/uid is allowed to access that uri, or 1727 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1728 * 1729 * @see #checkCallingUriPermission 1730 */ 1731 public abstract int checkUriPermission(Uri uri, int pid, int uid, int modeFlags); 1732 1733 /** 1734 * Determine whether the calling process and user ID has been 1735 * granted permission to access a specific URI. This is basically 1736 * the same as calling {@link #checkUriPermission(Uri, int, int, 1737 * int)} with the pid and uid returned by {@link 1738 * android.os.Binder#getCallingPid} and {@link 1739 * android.os.Binder#getCallingUid}. One important difference is 1740 * that if you are not currently processing an IPC, this function 1741 * will always fail. 1742 * 1743 * @param uri The uri that is being checked. 1744 * @param modeFlags The type of access to grant. May be one or both of 1745 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1746 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1747 * 1748 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 1749 * is allowed to access that uri, or 1750 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1751 * 1752 * @see #checkUriPermission(Uri, int, int, int) 1753 */ 1754 public abstract int checkCallingUriPermission(Uri uri, int modeFlags); 1755 1756 /** 1757 * Determine whether the calling process of an IPC <em>or you</em> has been granted 1758 * permission to access a specific URI. This is the same as 1759 * {@link #checkCallingUriPermission}, except it grants your own permissions 1760 * if you are not currently processing an IPC. Use with care! 1761 * 1762 * @param uri The uri that is being checked. 1763 * @param modeFlags The type of access to grant. May be one or both of 1764 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1765 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1766 * 1767 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 1768 * is allowed to access that uri, or 1769 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1770 * 1771 * @see #checkCallingUriPermission 1772 */ 1773 public abstract int checkCallingOrSelfUriPermission(Uri uri, int modeFlags); 1774 1775 /** 1776 * Check both a Uri and normal permission. This allows you to perform 1777 * both {@link #checkPermission} and {@link #checkUriPermission} in one 1778 * call. 1779 * 1780 * @param uri The Uri whose permission is to be checked, or null to not 1781 * do this check. 1782 * @param readPermission The permission that provides overall read access, 1783 * or null to not do this check. 1784 * @param writePermission The permission that provides overall write 1785 * acess, or null to not do this check. 1786 * @param pid The process ID being checked against. Must be > 0. 1787 * @param uid The user ID being checked against. A uid of 0 is the root 1788 * user, which will pass every permission check. 1789 * @param modeFlags The type of access to grant. May be one or both of 1790 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1791 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1792 * 1793 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 1794 * is allowed to access that uri or holds one of the given permissions, or 1795 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1796 */ 1797 public abstract int checkUriPermission(Uri uri, String readPermission, 1798 String writePermission, int pid, int uid, int modeFlags); 1799 1800 /** 1801 * If a particular process and user ID has not been granted 1802 * permission to access a specific URI, throw {@link 1803 * SecurityException}. This only checks for permissions that have 1804 * been explicitly granted -- if the given process/uid has more 1805 * general access to the URI's content provider then this check 1806 * will always fail. 1807 * 1808 * @param uri The uri that is being checked. 1809 * @param pid The process ID being checked against. Must be > 0. 1810 * @param uid The user ID being checked against. A uid of 0 is the root 1811 * user, which will pass every permission check. 1812 * @param modeFlags The type of access to grant. May be one or both of 1813 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1814 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1815 * @param message A message to include in the exception if it is thrown. 1816 * 1817 * @see #checkUriPermission(Uri, int, int, int) 1818 */ 1819 public abstract void enforceUriPermission( 1820 Uri uri, int pid, int uid, int modeFlags, String message); 1821 1822 /** 1823 * If the calling process and user ID has not been granted 1824 * permission to access a specific URI, throw {@link 1825 * SecurityException}. This is basically the same as calling 1826 * {@link #enforceUriPermission(Uri, int, int, int, String)} with 1827 * the pid and uid returned by {@link 1828 * android.os.Binder#getCallingPid} and {@link 1829 * android.os.Binder#getCallingUid}. One important difference is 1830 * that if you are not currently processing an IPC, this function 1831 * will always throw a SecurityException. 1832 * 1833 * @param uri The uri that is being checked. 1834 * @param modeFlags The type of access to grant. May be one or both of 1835 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1836 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1837 * @param message A message to include in the exception if it is thrown. 1838 * 1839 * @see #checkCallingUriPermission(Uri, int) 1840 */ 1841 public abstract void enforceCallingUriPermission( 1842 Uri uri, int modeFlags, String message); 1843 1844 /** 1845 * If the calling process of an IPC <em>or you</em> has not been 1846 * granted permission to access a specific URI, throw {@link 1847 * SecurityException}. This is the same as {@link 1848 * #enforceCallingUriPermission}, except it grants your own 1849 * permissions if you are not currently processing an IPC. Use 1850 * with care! 1851 * 1852 * @param uri The uri that is being checked. 1853 * @param modeFlags The type of access to grant. May be one or both of 1854 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1855 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1856 * @param message A message to include in the exception if it is thrown. 1857 * 1858 * @see #checkCallingOrSelfUriPermission(Uri, int) 1859 */ 1860 public abstract void enforceCallingOrSelfUriPermission( 1861 Uri uri, int modeFlags, String message); 1862 1863 /** 1864 * Enforce both a Uri and normal permission. This allows you to perform 1865 * both {@link #enforcePermission} and {@link #enforceUriPermission} in one 1866 * call. 1867 * 1868 * @param uri The Uri whose permission is to be checked, or null to not 1869 * do this check. 1870 * @param readPermission The permission that provides overall read access, 1871 * or null to not do this check. 1872 * @param writePermission The permission that provides overall write 1873 * acess, or null to not do this check. 1874 * @param pid The process ID being checked against. Must be > 0. 1875 * @param uid The user ID being checked against. A uid of 0 is the root 1876 * user, which will pass every permission check. 1877 * @param modeFlags The type of access to grant. May be one or both of 1878 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1879 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1880 * @param message A message to include in the exception if it is thrown. 1881 * 1882 * @see #checkUriPermission(Uri, String, String, int, int, int) 1883 */ 1884 public abstract void enforceUriPermission( 1885 Uri uri, String readPermission, String writePermission, 1886 int pid, int uid, int modeFlags, String message); 1887 1888 /** 1889 * Flag for use with {@link #createPackageContext}: include the application 1890 * code with the context. This means loading code into the caller's 1891 * process, so that {@link #getClassLoader()} can be used to instantiate 1892 * the application's classes. Setting this flags imposes security 1893 * restrictions on what application context you can access; if the 1894 * requested application can not be safely loaded into your process, 1895 * java.lang.SecurityException will be thrown. If this flag is not set, 1896 * there will be no restrictions on the packages that can be loaded, 1897 * but {@link #getClassLoader} will always return the default system 1898 * class loader. 1899 */ 1900 public static final int CONTEXT_INCLUDE_CODE = 0x00000001; 1901 1902 /** 1903 * Flag for use with {@link #createPackageContext}: ignore any security 1904 * restrictions on the Context being requested, allowing it to always 1905 * be loaded. For use with {@link #CONTEXT_INCLUDE_CODE} to allow code 1906 * to be loaded into a process even when it isn't safe to do so. Use 1907 * with extreme care! 1908 */ 1909 public static final int CONTEXT_IGNORE_SECURITY = 0x00000002; 1910 1911 /** 1912 * Flag for use with {@link #createPackageContext}: a restricted context may 1913 * disable specific features. For instance, a View associated with a restricted 1914 * context would ignore particular XML attributes. 1915 */ 1916 public static final int CONTEXT_RESTRICTED = 0x00000004; 1917 1918 /** 1919 * Return a new Context object for the given application name. This 1920 * Context is the same as what the named application gets when it is 1921 * launched, containing the same resources and class loader. Each call to 1922 * this method returns a new instance of a Context object; Context objects 1923 * are not shared, however they share common state (Resources, ClassLoader, 1924 * etc) so the Context instance itself is fairly lightweight. 1925 * 1926 * <p>Throws {@link PackageManager.NameNotFoundException} if there is no 1927 * application with the given package name. 1928 * 1929 * <p>Throws {@link java.lang.SecurityException} if the Context requested 1930 * can not be loaded into the caller's process for security reasons (see 1931 * {@link #CONTEXT_INCLUDE_CODE} for more information}. 1932 * 1933 * @param packageName Name of the application's package. 1934 * @param flags Option flags, one of {@link #CONTEXT_INCLUDE_CODE} 1935 * or {@link #CONTEXT_IGNORE_SECURITY}. 1936 * 1937 * @return A Context for the application. 1938 * 1939 * @throws java.lang.SecurityException 1940 * @throws PackageManager.NameNotFoundException if there is no application with 1941 * the given package name 1942 */ 1943 public abstract Context createPackageContext(String packageName, 1944 int flags) throws PackageManager.NameNotFoundException; 1945 1946 /** 1947 * Indicates whether this Context is restricted. 1948 * 1949 * @return True if this Context is restricted, false otherwise. 1950 * 1951 * @see #CONTEXT_RESTRICTED 1952 */ 1953 public boolean isRestricted() { 1954 return false; 1955 } 1956} 1957