Context.java revision 48d9980d0c7169f353c2cd60657c399fa7fce0ac
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 supply 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 their 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 * @see android.os.Environment#getExternalStoragePublicDirectory 483 */ 484 public abstract File getExternalFilesDir(String type); 485 486 /** 487 * Returns the absolute path to the application specific cache directory 488 * on the filesystem. These files will be ones that get deleted first when the 489 * device runs low on storage. 490 * There is no guarantee when these files will be deleted. 491 * 492 * <strong>Note: you should not <em>rely</em> on the system deleting these 493 * files for you; you should always have a reasonable maximum, such as 1 MB, 494 * for the amount of space you consume with cache files, and prune those 495 * files when exceeding that space.</strong> 496 * 497 * @return Returns the path of the directory holding application cache files. 498 * 499 * @see #openFileOutput 500 * @see #getFileStreamPath 501 * @see #getDir 502 */ 503 public abstract File getCacheDir(); 504 505 /** 506 * Returns the absolute path to the directory on the external filesystem 507 * (that is somewhere on {@link android.os.Environment#getExternalStorageDirectory() 508 * Environment.getExternalStorageDirectory()} where the application can 509 * place cache files it owns. 510 * 511 * <p>This is like {@link #getCacheDir()} in that these 512 * files will be deleted when the application is uninstalled, however there 513 * are some important differences: 514 * 515 * <ul> 516 * <li>The platform does not monitor the space available in external storage, 517 * and thus will not automatically delete these files. Note that you should 518 * be managing the maximum space you will use for these anyway, just like 519 * with {@link #getCacheDir()}. 520 * <li>External files are not always available: they will disappear if the 521 * user mounts the external storage on a computer or removes it. See the 522 * APIs on {@link android.os.Environment} for information in the storage state. 523 * <li>There is no security enforced with these files. All applications 524 * can read and write files placed here. 525 * </ul> 526 * 527 * @return Returns the path of the directory holding application cache files 528 * on external storage. Returns null if external storage is not currently 529 * mounted so it could not ensure the path exists; you will need to call 530 * this method again when it is available. 531 * 532 * @see #getCacheDir 533 */ 534 public abstract File getExternalCacheDir(); 535 536 /** 537 * Returns an array of strings naming the private files associated with 538 * this Context's application package. 539 * 540 * @return Array of strings naming the private files. 541 * 542 * @see #openFileInput 543 * @see #openFileOutput 544 * @see #deleteFile 545 */ 546 public abstract String[] fileList(); 547 548 /** 549 * Retrieve, creating if needed, a new directory in which the application 550 * can place its own custom data files. You can use the returned File 551 * object to create and access files in this directory. Note that files 552 * created through a File object will only be accessible by your own 553 * application; you can only set the mode of the entire directory, not 554 * of individual files. 555 * 556 * @param name Name of the directory to retrieve. This is a directory 557 * that is created as part of your application data. 558 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 559 * default operation, {@link #MODE_WORLD_READABLE} and 560 * {@link #MODE_WORLD_WRITEABLE} to control permissions. 561 * 562 * @return Returns a File object for the requested directory. The directory 563 * will have been created if it does not already exist. 564 * 565 * @see #openFileOutput(String, int) 566 */ 567 public abstract File getDir(String name, int mode); 568 569 /** 570 * Open a new private SQLiteDatabase associated with this Context's 571 * application package. Create the database file if it doesn't exist. 572 * 573 * @param name The name (unique in the application package) of the database. 574 * @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the 575 * default operation, {@link #MODE_WORLD_READABLE} 576 * and {@link #MODE_WORLD_WRITEABLE} to control permissions. 577 * @param factory An optional factory class that is called to instantiate a 578 * cursor when query is called. 579 * 580 * @return The contents of a newly created database with the given name. 581 * @throws android.database.sqlite.SQLiteException if the database file could not be opened. 582 * 583 * @see #MODE_PRIVATE 584 * @see #MODE_WORLD_READABLE 585 * @see #MODE_WORLD_WRITEABLE 586 * @see #deleteDatabase 587 */ 588 public abstract SQLiteDatabase openOrCreateDatabase(String name, 589 int mode, CursorFactory factory); 590 591 /** 592 * Delete an existing private SQLiteDatabase associated with this Context's 593 * application package. 594 * 595 * @param name The name (unique in the application package) of the 596 * database. 597 * 598 * @return True if the database was successfully deleted; else false. 599 * 600 * @see #openOrCreateDatabase 601 */ 602 public abstract boolean deleteDatabase(String name); 603 604 /** 605 * Returns the absolute path on the filesystem where a database created with 606 * {@link #openOrCreateDatabase} is stored. 607 * 608 * @param name The name of the database for which you would like to get 609 * its path. 610 * 611 * @return Returns an absolute path to the given database. 612 * 613 * @see #openOrCreateDatabase 614 */ 615 public abstract File getDatabasePath(String name); 616 617 /** 618 * Returns an array of strings naming the private databases associated with 619 * this Context's application package. 620 * 621 * @return Array of strings naming the private databases. 622 * 623 * @see #openOrCreateDatabase 624 * @see #deleteDatabase 625 */ 626 public abstract String[] databaseList(); 627 628 /** 629 * @deprecated Use {@link android.app.WallpaperManager#getDrawable 630 * WallpaperManager.get()} instead. 631 */ 632 @Deprecated 633 public abstract Drawable getWallpaper(); 634 635 /** 636 * @deprecated Use {@link android.app.WallpaperManager#peekDrawable 637 * WallpaperManager.peek()} instead. 638 */ 639 @Deprecated 640 public abstract Drawable peekWallpaper(); 641 642 /** 643 * @deprecated Use {@link android.app.WallpaperManager#getDesiredMinimumWidth() 644 * WallpaperManager.getDesiredMinimumWidth()} instead. 645 */ 646 @Deprecated 647 public abstract int getWallpaperDesiredMinimumWidth(); 648 649 /** 650 * @deprecated Use {@link android.app.WallpaperManager#getDesiredMinimumHeight() 651 * WallpaperManager.getDesiredMinimumHeight()} instead. 652 */ 653 @Deprecated 654 public abstract int getWallpaperDesiredMinimumHeight(); 655 656 /** 657 * @deprecated Use {@link android.app.WallpaperManager#setBitmap(Bitmap) 658 * WallpaperManager.set()} instead. 659 */ 660 @Deprecated 661 public abstract void setWallpaper(Bitmap bitmap) throws IOException; 662 663 /** 664 * @deprecated Use {@link android.app.WallpaperManager#setStream(InputStream) 665 * WallpaperManager.set()} instead. 666 */ 667 @Deprecated 668 public abstract void setWallpaper(InputStream data) throws IOException; 669 670 /** 671 * @deprecated Use {@link android.app.WallpaperManager#clear 672 * WallpaperManager.clear()} instead. 673 */ 674 @Deprecated 675 public abstract void clearWallpaper() throws IOException; 676 677 /** 678 * Launch a new activity. You will not receive any information about when 679 * the activity exits. 680 * 681 * <p>Note that if this method is being called from outside of an 682 * {@link android.app.Activity} Context, then the Intent must include 683 * the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag. This is because, 684 * without being started from an existing Activity, there is no existing 685 * task in which to place the new activity and thus it needs to be placed 686 * in its own separate task. 687 * 688 * <p>This method throws {@link ActivityNotFoundException} 689 * if there was no Activity found to run the given Intent. 690 * 691 * @param intent The description of the activity to start. 692 * 693 * @throws ActivityNotFoundException 694 * 695 * @see PackageManager#resolveActivity 696 */ 697 public abstract void startActivity(Intent intent); 698 699 /** 700 * Like {@link #startActivity(Intent)}, but taking a IntentSender 701 * to start. If the IntentSender is for an activity, that activity will be started 702 * as if you had called the regular {@link #startActivity(Intent)} 703 * here; otherwise, its associated action will be executed (such as 704 * sending a broadcast) as if you had called 705 * {@link IntentSender#sendIntent IntentSender.sendIntent} on it. 706 * 707 * @param intent The IntentSender to launch. 708 * @param fillInIntent If non-null, this will be provided as the 709 * intent parameter to {@link IntentSender#sendIntent}. 710 * @param flagsMask Intent flags in the original IntentSender that you 711 * would like to change. 712 * @param flagsValues Desired values for any bits set in 713 * <var>flagsMask</var> 714 * @param extraFlags Always set to 0. 715 */ 716 public abstract void startIntentSender(IntentSender intent, 717 Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) 718 throws IntentSender.SendIntentException; 719 720 /** 721 * Broadcast the given intent to all interested BroadcastReceivers. This 722 * call is asynchronous; it returns immediately, and you will continue 723 * executing while the receivers are run. No results are propagated from 724 * receivers and receivers can not abort the broadcast. If you want 725 * to allow receivers to propagate results or abort the broadcast, you must 726 * send an ordered broadcast using 727 * {@link #sendOrderedBroadcast(Intent, String)}. 728 * 729 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 730 * 731 * @param intent The Intent to broadcast; all receivers matching this 732 * Intent will receive the broadcast. 733 * 734 * @see android.content.BroadcastReceiver 735 * @see #registerReceiver 736 * @see #sendBroadcast(Intent, String) 737 * @see #sendOrderedBroadcast(Intent, String) 738 * @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle) 739 */ 740 public abstract void sendBroadcast(Intent intent); 741 742 /** 743 * Broadcast the given intent to all interested BroadcastReceivers, allowing 744 * an optional required permission to be enforced. This 745 * call is asynchronous; it returns immediately, and you will continue 746 * executing while the receivers are run. No results are propagated from 747 * receivers and receivers can not abort the broadcast. If you want 748 * to allow receivers to propagate results or abort the broadcast, you must 749 * send an ordered broadcast using 750 * {@link #sendOrderedBroadcast(Intent, String)}. 751 * 752 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 753 * 754 * @param intent The Intent to broadcast; all receivers matching this 755 * Intent will receive the broadcast. 756 * @param receiverPermission (optional) String naming a permissions that 757 * a receiver must hold in order to receive your broadcast. 758 * If null, no permission is required. 759 * 760 * @see android.content.BroadcastReceiver 761 * @see #registerReceiver 762 * @see #sendBroadcast(Intent) 763 * @see #sendOrderedBroadcast(Intent, String) 764 * @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle) 765 */ 766 public abstract void sendBroadcast(Intent intent, 767 String receiverPermission); 768 769 /** 770 * Broadcast the given intent to all interested BroadcastReceivers, delivering 771 * them one at a time to allow more preferred receivers to consume the 772 * broadcast before it is delivered to less preferred receivers. This 773 * call is asynchronous; it returns immediately, and you will continue 774 * executing while the receivers are run. 775 * 776 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 777 * 778 * @param intent The Intent to broadcast; all receivers matching this 779 * Intent will receive the broadcast. 780 * @param receiverPermission (optional) String naming a permissions that 781 * a receiver must hold in order to receive your broadcast. 782 * If null, no permission is required. 783 * 784 * @see android.content.BroadcastReceiver 785 * @see #registerReceiver 786 * @see #sendBroadcast(Intent) 787 * @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle) 788 */ 789 public abstract void sendOrderedBroadcast(Intent intent, 790 String receiverPermission); 791 792 /** 793 * Version of {@link #sendBroadcast(Intent)} that allows you to 794 * receive data back from the broadcast. This is accomplished by 795 * supplying your own BroadcastReceiver when calling, which will be 796 * treated as a final receiver at the end of the broadcast -- its 797 * {@link BroadcastReceiver#onReceive} method will be called with 798 * the result values collected from the other receivers. The broadcast will 799 * be serialized in the same way as calling 800 * {@link #sendOrderedBroadcast(Intent, String)}. 801 * 802 * <p>Like {@link #sendBroadcast(Intent)}, this method is 803 * asynchronous; it will return before 804 * resultReceiver.onReceive() is called. 805 * 806 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 807 * 808 * @param intent The Intent to broadcast; all receivers matching this 809 * Intent will receive the broadcast. 810 * @param receiverPermission String naming a permissions that 811 * a receiver must hold in order to receive your broadcast. 812 * If null, no permission is required. 813 * @param resultReceiver Your own BroadcastReceiver to treat as the final 814 * receiver of the broadcast. 815 * @param scheduler A custom Handler with which to schedule the 816 * resultReceiver callback; if null it will be 817 * scheduled in the Context's main thread. 818 * @param initialCode An initial value for the result code. Often 819 * Activity.RESULT_OK. 820 * @param initialData An initial value for the result data. Often 821 * null. 822 * @param initialExtras An initial value for the result extras. Often 823 * null. 824 * 825 * @see #sendBroadcast(Intent) 826 * @see #sendBroadcast(Intent, String) 827 * @see #sendOrderedBroadcast(Intent, String) 828 * @see #sendStickyBroadcast(Intent) 829 * @see #sendStickyOrderedBroadcast(Intent, BroadcastReceiver, Handler, int, String, Bundle) 830 * @see android.content.BroadcastReceiver 831 * @see #registerReceiver 832 * @see android.app.Activity#RESULT_OK 833 */ 834 public abstract void sendOrderedBroadcast(Intent intent, 835 String receiverPermission, BroadcastReceiver resultReceiver, 836 Handler scheduler, int initialCode, String initialData, 837 Bundle initialExtras); 838 839 /** 840 * Perform a {@link #sendBroadcast(Intent)} that is "sticky," meaning the 841 * Intent you are sending stays around after the broadcast is complete, 842 * so that others can quickly retrieve that data through the return 843 * value of {@link #registerReceiver(BroadcastReceiver, IntentFilter)}. In 844 * all other ways, this behaves the same as 845 * {@link #sendBroadcast(Intent)}. 846 * 847 * <p>You must hold the {@link android.Manifest.permission#BROADCAST_STICKY} 848 * permission in order to use this API. If you do not hold that 849 * permission, {@link SecurityException} will be thrown. 850 * 851 * @param intent The Intent to broadcast; all receivers matching this 852 * Intent will receive the broadcast, and the Intent will be held to 853 * be re-broadcast to future receivers. 854 * 855 * @see #sendBroadcast(Intent) 856 * @see #sendStickyOrderedBroadcast(Intent, BroadcastReceiver, Handler, int, String, Bundle) 857 */ 858 public abstract void sendStickyBroadcast(Intent intent); 859 860 /** 861 * Version of {@link #sendStickyBroadcast} that allows you to 862 * receive data back from the broadcast. This is accomplished by 863 * supplying your own BroadcastReceiver when calling, which will be 864 * treated as a final receiver at the end of the broadcast -- its 865 * {@link BroadcastReceiver#onReceive} method will be called with 866 * the result values collected from the other receivers. The broadcast will 867 * be serialized in the same way as calling 868 * {@link #sendOrderedBroadcast(Intent, String)}. 869 * 870 * <p>Like {@link #sendBroadcast(Intent)}, this method is 871 * asynchronous; it will return before 872 * resultReceiver.onReceive() is called. Note that the sticky data 873 * stored is only the data you initially supply to the broadcast, not 874 * the result of any changes made by the receivers. 875 * 876 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 877 * 878 * @param intent The Intent to broadcast; all receivers matching this 879 * Intent will receive the broadcast. 880 * @param resultReceiver Your own BroadcastReceiver to treat as the final 881 * receiver of the broadcast. 882 * @param scheduler A custom Handler with which to schedule the 883 * resultReceiver callback; if null it will be 884 * scheduled in the Context's main thread. 885 * @param initialCode An initial value for the result code. Often 886 * Activity.RESULT_OK. 887 * @param initialData An initial value for the result data. Often 888 * null. 889 * @param initialExtras An initial value for the result extras. Often 890 * null. 891 * 892 * @see #sendBroadcast(Intent) 893 * @see #sendBroadcast(Intent, String) 894 * @see #sendOrderedBroadcast(Intent, String) 895 * @see #sendStickyBroadcast(Intent) 896 * @see android.content.BroadcastReceiver 897 * @see #registerReceiver 898 * @see android.app.Activity#RESULT_OK 899 */ 900 public abstract void sendStickyOrderedBroadcast(Intent intent, 901 BroadcastReceiver resultReceiver, 902 Handler scheduler, int initialCode, String initialData, 903 Bundle initialExtras); 904 905 906 /** 907 * Remove the data previously sent with {@link #sendStickyBroadcast}, 908 * so that it is as if the sticky broadcast had never happened. 909 * 910 * <p>You must hold the {@link android.Manifest.permission#BROADCAST_STICKY} 911 * permission in order to use this API. If you do not hold that 912 * permission, {@link SecurityException} will be thrown. 913 * 914 * @param intent The Intent that was previously broadcast. 915 * 916 * @see #sendStickyBroadcast 917 */ 918 public abstract void removeStickyBroadcast(Intent intent); 919 920 /** 921 * Register a BroadcastReceiver to be run in the main activity thread. The 922 * <var>receiver</var> will be called with any broadcast Intent that 923 * matches <var>filter</var>, in the main application thread. 924 * 925 * <p>The system may broadcast Intents that are "sticky" -- these stay 926 * around after the broadcast as finished, to be sent to any later 927 * registrations. If your IntentFilter matches one of these sticky 928 * Intents, that Intent will be returned by this function 929 * <strong>and</strong> sent to your <var>receiver</var> as if it had just 930 * been broadcast. 931 * 932 * <p>There may be multiple sticky Intents that match <var>filter</var>, 933 * in which case each of these will be sent to <var>receiver</var>. In 934 * this case, only one of these can be returned directly by the function; 935 * which of these that is returned is arbitrarily decided by the system. 936 * 937 * <p>If you know the Intent your are registering for is sticky, you can 938 * supply null for your <var>receiver</var>. In this case, no receiver is 939 * registered -- the function simply returns the sticky Intent that 940 * matches <var>filter</var>. In the case of multiple matches, the same 941 * rules as described above apply. 942 * 943 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 944 * 945 * <p class="note">Note: this method <em>cannot be called from a 946 * {@link BroadcastReceiver} component;</em> that is, from a BroadcastReceiver 947 * that is declared in an application's manifest. It is okay, however, to call 948 * this method from another BroadcastReceiver that has itself been registered 949 * at run time with {@link #registerReceiver}, since the lifetime of such a 950 * registered BroadcastReceiver is tied to the object that registered it.</p> 951 * 952 * @param receiver The BroadcastReceiver to handle the broadcast. 953 * @param filter Selects the Intent broadcasts to be received. 954 * 955 * @return The first sticky intent found that matches <var>filter</var>, 956 * or null if there are none. 957 * 958 * @see #registerReceiver(BroadcastReceiver, IntentFilter, String, Handler) 959 * @see #sendBroadcast 960 * @see #unregisterReceiver 961 */ 962 public abstract Intent registerReceiver(BroadcastReceiver receiver, 963 IntentFilter filter); 964 965 /** 966 * Register to receive intent broadcasts, to run in the context of 967 * <var>scheduler</var>. See 968 * {@link #registerReceiver(BroadcastReceiver, IntentFilter)} for more 969 * information. This allows you to enforce permissions on who can 970 * broadcast intents to your receiver, or have the receiver run in 971 * a different thread than the main application thread. 972 * 973 * <p>See {@link BroadcastReceiver} for more information on Intent broadcasts. 974 * 975 * @param receiver The BroadcastReceiver to handle the broadcast. 976 * @param filter Selects the Intent broadcasts to be received. 977 * @param broadcastPermission String naming a permissions that a 978 * broadcaster must hold in order to send an Intent to you. If null, 979 * no permission is required. 980 * @param scheduler Handler identifying the thread that will receive 981 * the Intent. If null, the main thread of the process will be used. 982 * 983 * @return The first sticky intent found that matches <var>filter</var>, 984 * or null if there are none. 985 * 986 * @see #registerReceiver(BroadcastReceiver, IntentFilter) 987 * @see #sendBroadcast 988 * @see #unregisterReceiver 989 */ 990 public abstract Intent registerReceiver(BroadcastReceiver receiver, 991 IntentFilter filter, 992 String broadcastPermission, 993 Handler scheduler); 994 995 /** 996 * Unregister a previously registered BroadcastReceiver. <em>All</em> 997 * filters that have been registered for this BroadcastReceiver will be 998 * removed. 999 * 1000 * @param receiver The BroadcastReceiver to unregister. 1001 * 1002 * @see #registerReceiver 1003 */ 1004 public abstract void unregisterReceiver(BroadcastReceiver receiver); 1005 1006 /** 1007 * Request that a given application service be started. The Intent 1008 * can either contain the complete class name of a specific service 1009 * implementation to start, or an abstract definition through the 1010 * action and other fields of the kind of service to start. If this service 1011 * is not already running, it will be instantiated and started (creating a 1012 * process for it if needed); if it is running then it remains running. 1013 * 1014 * <p>Every call to this method will result in a corresponding call to 1015 * the target service's {@link android.app.Service#onStart} method, 1016 * with the <var>intent</var> given here. This provides a convenient way 1017 * to submit jobs to a service without having to bind and call on to its 1018 * interface. 1019 * 1020 * <p>Using startService() overrides the default service lifetime that is 1021 * managed by {@link #bindService}: it requires the service to remain 1022 * running until {@link #stopService} is called, regardless of whether 1023 * any clients are connected to it. Note that calls to startService() 1024 * are not nesting: no matter how many times you call startService(), 1025 * a single call to {@link #stopService} will stop it. 1026 * 1027 * <p>The system attempts to keep running services around as much as 1028 * possible. The only time they should be stopped is if the current 1029 * foreground application is using so many resources that the service needs 1030 * to be killed. If any errors happen in the service's process, it will 1031 * automatically be restarted. 1032 * 1033 * <p>This function will throw {@link SecurityException} if you do not 1034 * have permission to start the given service. 1035 * 1036 * @param service Identifies the service to be started. The Intent may 1037 * specify either an explicit component name to start, or a logical 1038 * description (action, category, etc) to match an 1039 * {@link IntentFilter} published by a service. Additional values 1040 * may be included in the Intent extras to supply arguments along with 1041 * this specific start call. 1042 * 1043 * @return If the service is being started or is already running, the 1044 * {@link ComponentName} of the actual service that was started is 1045 * returned; else if the service does not exist null is returned. 1046 * 1047 * @throws SecurityException 1048 * 1049 * @see #stopService 1050 * @see #bindService 1051 */ 1052 public abstract ComponentName startService(Intent service); 1053 1054 /** 1055 * Request that a given application service be stopped. If the service is 1056 * not running, nothing happens. Otherwise it is stopped. Note that calls 1057 * to startService() are not counted -- this stops the service no matter 1058 * how many times it was started. 1059 * 1060 * <p>Note that if a stopped service still has {@link ServiceConnection} 1061 * objects bound to it with the {@link #BIND_AUTO_CREATE} set, it will 1062 * not be destroyed until all of these bindings are removed. See 1063 * the {@link android.app.Service} documentation for more details on a 1064 * service's lifecycle. 1065 * 1066 * <p>This function will throw {@link SecurityException} if you do not 1067 * have permission to stop the given service. 1068 * 1069 * @param service Description of the service to be stopped. The Intent may 1070 * specify either an explicit component name to start, or a logical 1071 * description (action, category, etc) to match an 1072 * {@link IntentFilter} published by a service. 1073 * 1074 * @return If there is a service matching the given Intent that is already 1075 * running, then it is stopped and true is returned; else false is returned. 1076 * 1077 * @throws SecurityException 1078 * 1079 * @see #startService 1080 */ 1081 public abstract boolean stopService(Intent service); 1082 1083 /** 1084 * Connect to an application service, creating it if needed. This defines 1085 * a dependency between your application and the service. The given 1086 * <var>conn</var> will receive the service object when its created and be 1087 * told if it dies and restarts. The service will be considered required 1088 * by the system only for as long as the calling context exists. For 1089 * example, if this Context is an Activity that is stopped, the service will 1090 * not be required to continue running until the Activity is resumed. 1091 * 1092 * <p>This function will throw {@link SecurityException} if you do not 1093 * have permission to bind to the given service. 1094 * 1095 * <p class="note">Note: this method <em>can not be called from an 1096 * {@link BroadcastReceiver} component</em>. A pattern you can use to 1097 * communicate from an BroadcastReceiver to a Service is to call 1098 * {@link #startService} with the arguments containing the command to be 1099 * sent, with the service calling its 1100 * {@link android.app.Service#stopSelf(int)} method when done executing 1101 * that command. See the API demo App/Service/Service Start Arguments 1102 * Controller for an illustration of this. It is okay, however, to use 1103 * this method from an BroadcastReceiver that has been registered with 1104 * {@link #registerReceiver}, since the lifetime of this BroadcastReceiver 1105 * is tied to another object (the one that registered it).</p> 1106 * 1107 * @param service Identifies the service to connect to. The Intent may 1108 * specify either an explicit component name, or a logical 1109 * description (action, category, etc) to match an 1110 * {@link IntentFilter} published by a service. 1111 * @param conn Receives information as the service is started and stopped. 1112 * @param flags Operation options for the binding. May be 0 or 1113 * {@link #BIND_AUTO_CREATE}. 1114 * @return If you have successfully bound to the service, true is returned; 1115 * false is returned if the connection is not made so you will not 1116 * receive the service object. 1117 * 1118 * @throws SecurityException 1119 * 1120 * @see #unbindService 1121 * @see #startService 1122 * @see #BIND_AUTO_CREATE 1123 */ 1124 public abstract boolean bindService(Intent service, ServiceConnection conn, 1125 int flags); 1126 1127 /** 1128 * Disconnect from an application service. You will no longer receive 1129 * calls as the service is restarted, and the service is now allowed to 1130 * stop at any time. 1131 * 1132 * @param conn The connection interface previously supplied to 1133 * bindService(). 1134 * 1135 * @see #bindService 1136 */ 1137 public abstract void unbindService(ServiceConnection conn); 1138 1139 /** 1140 * Start executing an {@link android.app.Instrumentation} class. The given 1141 * Instrumentation component will be run by killing its target application 1142 * (if currently running), starting the target process, instantiating the 1143 * instrumentation component, and then letting it drive the application. 1144 * 1145 * <p>This function is not synchronous -- it returns as soon as the 1146 * instrumentation has started and while it is running. 1147 * 1148 * <p>Instrumentation is normally only allowed to run against a package 1149 * that is either unsigned or signed with a signature that the 1150 * the instrumentation package is also signed with (ensuring the target 1151 * trusts the instrumentation). 1152 * 1153 * @param className Name of the Instrumentation component to be run. 1154 * @param profileFile Optional path to write profiling data as the 1155 * instrumentation runs, or null for no profiling. 1156 * @param arguments Additional optional arguments to pass to the 1157 * instrumentation, or null. 1158 * 1159 * @return Returns true if the instrumentation was successfully started, 1160 * else false if it could not be found. 1161 */ 1162 public abstract boolean startInstrumentation(ComponentName className, 1163 String profileFile, Bundle arguments); 1164 1165 /** 1166 * Return the handle to a system-level service by name. The class of the 1167 * returned object varies by the requested name. Currently available names 1168 * are: 1169 * 1170 * <dl> 1171 * <dt> {@link #WINDOW_SERVICE} ("window") 1172 * <dd> The top-level window manager in which you can place custom 1173 * windows. The returned object is a {@link android.view.WindowManager}. 1174 * <dt> {@link #LAYOUT_INFLATER_SERVICE} ("layout_inflater") 1175 * <dd> A {@link android.view.LayoutInflater} for inflating layout resources 1176 * in this context. 1177 * <dt> {@link #ACTIVITY_SERVICE} ("activity") 1178 * <dd> A {@link android.app.ActivityManager} for interacting with the 1179 * global activity state of the system. 1180 * <dt> {@link #POWER_SERVICE} ("power") 1181 * <dd> A {@link android.os.PowerManager} for controlling power 1182 * management. 1183 * <dt> {@link #ALARM_SERVICE} ("alarm") 1184 * <dd> A {@link android.app.AlarmManager} for receiving intents at the 1185 * time of your choosing. 1186 * <dt> {@link #NOTIFICATION_SERVICE} ("notification") 1187 * <dd> A {@link android.app.NotificationManager} for informing the user 1188 * of background events. 1189 * <dt> {@link #KEYGUARD_SERVICE} ("keyguard") 1190 * <dd> A {@link android.app.KeyguardManager} for controlling keyguard. 1191 * <dt> {@link #LOCATION_SERVICE} ("location") 1192 * <dd> A {@link android.location.LocationManager} for controlling location 1193 * (e.g., GPS) updates. 1194 * <dt> {@link #SEARCH_SERVICE} ("search") 1195 * <dd> A {@link android.app.SearchManager} for handling search. 1196 * <dt> {@link #VIBRATOR_SERVICE} ("vibrator") 1197 * <dd> A {@link android.os.Vibrator} for interacting with the vibrator 1198 * hardware. 1199 * <dt> {@link #CONNECTIVITY_SERVICE} ("connection") 1200 * <dd> A {@link android.net.ConnectivityManager ConnectivityManager} for 1201 * handling management of network connections. 1202 * <dt> {@link #WIFI_SERVICE} ("wifi") 1203 * <dd> A {@link android.net.wifi.WifiManager WifiManager} for management of 1204 * Wi-Fi connectivity. 1205 * <dt> {@link #INPUT_METHOD_SERVICE} ("input_method") 1206 * <dd> An {@link android.view.inputmethod.InputMethodManager InputMethodManager} 1207 * for management of input methods. 1208 * <dt> {@link #UI_MODE_SERVICE} ("uimode") 1209 * <dd> An {@link android.app.UiModeManager} for controlling UI modes. 1210 * </dl> 1211 * 1212 * <p>Note: System services obtained via this API may be closely associated with 1213 * the Context in which they are obtained from. In general, do not share the 1214 * service objects between various different contexts (Activities, Applications, 1215 * Services, Providers, etc.) 1216 * 1217 * @param name The name of the desired service. 1218 * 1219 * @return The service or null if the name does not exist. 1220 * 1221 * @see #WINDOW_SERVICE 1222 * @see android.view.WindowManager 1223 * @see #LAYOUT_INFLATER_SERVICE 1224 * @see android.view.LayoutInflater 1225 * @see #ACTIVITY_SERVICE 1226 * @see android.app.ActivityManager 1227 * @see #POWER_SERVICE 1228 * @see android.os.PowerManager 1229 * @see #ALARM_SERVICE 1230 * @see android.app.AlarmManager 1231 * @see #NOTIFICATION_SERVICE 1232 * @see android.app.NotificationManager 1233 * @see #KEYGUARD_SERVICE 1234 * @see android.app.KeyguardManager 1235 * @see #LOCATION_SERVICE 1236 * @see android.location.LocationManager 1237 * @see #SEARCH_SERVICE 1238 * @see android.app.SearchManager 1239 * @see #SENSOR_SERVICE 1240 * @see android.hardware.SensorManager 1241 * @see #STORAGE_SERVICE 1242 * @see android.os.storage.StorageManager 1243 * @see #VIBRATOR_SERVICE 1244 * @see android.os.Vibrator 1245 * @see #CONNECTIVITY_SERVICE 1246 * @see android.net.ConnectivityManager 1247 * @see #WIFI_SERVICE 1248 * @see android.net.wifi.WifiManager 1249 * @see #AUDIO_SERVICE 1250 * @see android.media.AudioManager 1251 * @see #TELEPHONY_SERVICE 1252 * @see android.telephony.TelephonyManager 1253 * @see #INPUT_METHOD_SERVICE 1254 * @see android.view.inputmethod.InputMethodManager 1255 * @see #UI_MODE_SERVICE 1256 * @see android.app.UiModeManager 1257 */ 1258 public abstract Object getSystemService(String name); 1259 1260 /** 1261 * Use with {@link #getSystemService} to retrieve a 1262 * {@link android.os.PowerManager} for controlling power management, 1263 * including "wake locks," which let you keep the device on while 1264 * you're running long tasks. 1265 */ 1266 public static final String POWER_SERVICE = "power"; 1267 1268 /** 1269 * Use with {@link #getSystemService} to retrieve a 1270 * {@link android.view.WindowManager} for accessing the system's window 1271 * manager. 1272 * 1273 * @see #getSystemService 1274 * @see android.view.WindowManager 1275 */ 1276 public static final String WINDOW_SERVICE = "window"; 1277 1278 /** 1279 * Use with {@link #getSystemService} to retrieve a 1280 * {@link android.view.LayoutInflater} for inflating layout resources in this 1281 * context. 1282 * 1283 * @see #getSystemService 1284 * @see android.view.LayoutInflater 1285 */ 1286 public static final String LAYOUT_INFLATER_SERVICE = "layout_inflater"; 1287 1288 /** 1289 * Use with {@link #getSystemService} to retrieve a 1290 * {@link android.accounts.AccountManager} for receiving intents at a 1291 * time of your choosing. 1292 * 1293 * @see #getSystemService 1294 * @see android.accounts.AccountManager 1295 */ 1296 public static final String ACCOUNT_SERVICE = "account"; 1297 1298 /** 1299 * Use with {@link #getSystemService} to retrieve a 1300 * {@link android.app.ActivityManager} for interacting with the global 1301 * system state. 1302 * 1303 * @see #getSystemService 1304 * @see android.app.ActivityManager 1305 */ 1306 public static final String ACTIVITY_SERVICE = "activity"; 1307 1308 /** 1309 * Use with {@link #getSystemService} to retrieve a 1310 * {@link android.app.AlarmManager} for receiving intents at a 1311 * time of your choosing. 1312 * 1313 * @see #getSystemService 1314 * @see android.app.AlarmManager 1315 */ 1316 public static final String ALARM_SERVICE = "alarm"; 1317 1318 /** 1319 * Use with {@link #getSystemService} to retrieve a 1320 * {@link android.app.NotificationManager} for informing the user of 1321 * background events. 1322 * 1323 * @see #getSystemService 1324 * @see android.app.NotificationManager 1325 */ 1326 public static final String NOTIFICATION_SERVICE = "notification"; 1327 1328 /** 1329 * Use with {@link #getSystemService} to retrieve a 1330 * {@link android.view.accessibility.AccessibilityManager} for giving the user 1331 * feedback for UI events through the registered event listeners. 1332 * 1333 * @see #getSystemService 1334 * @see android.view.accessibility.AccessibilityManager 1335 */ 1336 public static final String ACCESSIBILITY_SERVICE = "accessibility"; 1337 1338 /** 1339 * Use with {@link #getSystemService} to retrieve a 1340 * {@link android.app.NotificationManager} for controlling keyguard. 1341 * 1342 * @see #getSystemService 1343 * @see android.app.KeyguardManager 1344 */ 1345 public static final String KEYGUARD_SERVICE = "keyguard"; 1346 1347 /** 1348 * Use with {@link #getSystemService} to retrieve a {@link 1349 * android.location.LocationManager} for controlling location 1350 * updates. 1351 * 1352 * @see #getSystemService 1353 * @see android.location.LocationManager 1354 */ 1355 public static final String LOCATION_SERVICE = "location"; 1356 1357 /** 1358 * Use with {@link #getSystemService} to retrieve a {@link 1359 * android.app.SearchManager} for handling searches. 1360 * 1361 * @see #getSystemService 1362 * @see android.app.SearchManager 1363 */ 1364 public static final String SEARCH_SERVICE = "search"; 1365 1366 /** 1367 * Use with {@link #getSystemService} to retrieve a {@link 1368 * android.hardware.SensorManager} for accessing sensors. 1369 * 1370 * @see #getSystemService 1371 * @see android.hardware.SensorManager 1372 */ 1373 public static final String SENSOR_SERVICE = "sensor"; 1374 1375 /** 1376 * Use with {@link #getSystemService} to retrieve a {@link 1377 * android.os.storage.StorageManager} for accesssing system storage 1378 * functions. 1379 * 1380 * @see #getSystemService 1381 * @see android.os.storage.StorageManager 1382 */ 1383 public static final String STORAGE_SERVICE = "storage"; 1384 1385 /** 1386 * Use with {@link #getSystemService} to retrieve a 1387 * com.android.server.WallpaperService for accessing wallpapers. 1388 * 1389 * @see #getSystemService 1390 */ 1391 public static final String WALLPAPER_SERVICE = "wallpaper"; 1392 1393 /** 1394 * Use with {@link #getSystemService} to retrieve a {@link 1395 * android.os.Vibrator} for interacting with the vibration hardware. 1396 * 1397 * @see #getSystemService 1398 * @see android.os.Vibrator 1399 */ 1400 public static final String VIBRATOR_SERVICE = "vibrator"; 1401 1402 /** 1403 * Use with {@link #getSystemService} to retrieve a {@link 1404 * android.app.StatusBarManager} for interacting with the status bar. 1405 * 1406 * @see #getSystemService 1407 * @see android.app.StatusBarManager 1408 * @hide 1409 */ 1410 public static final String STATUS_BAR_SERVICE = "statusbar"; 1411 1412 /** 1413 * Use with {@link #getSystemService} to retrieve a {@link 1414 * android.net.ConnectivityManager} for handling management of 1415 * network connections. 1416 * 1417 * @see #getSystemService 1418 * @see android.net.ConnectivityManager 1419 */ 1420 public static final String CONNECTIVITY_SERVICE = "connectivity"; 1421 1422 /** 1423 * Use with {@link #getSystemService} to retrieve a {@link 1424 * android.net.NetworkManagementService} for handling management of 1425 * system network services 1426 * 1427 * @hide 1428 * @see #getSystemService 1429 * @see android.net.NetworkManagementService 1430 */ 1431 public static final String NETWORKMANAGEMENT_SERVICE = "network_management"; 1432 1433 /** 1434 * Use with {@link #getSystemService} to retrieve a {@link 1435 * android.net.wifi.WifiManager} for handling management of 1436 * Wi-Fi access. 1437 * 1438 * @see #getSystemService 1439 * @see android.net.wifi.WifiManager 1440 */ 1441 public static final String WIFI_SERVICE = "wifi"; 1442 1443 /** 1444 * Use with {@link #getSystemService} to retrieve a 1445 * {@link android.media.AudioManager} for handling management of volume, 1446 * ringer modes and audio routing. 1447 * 1448 * @see #getSystemService 1449 * @see android.media.AudioManager 1450 */ 1451 public static final String AUDIO_SERVICE = "audio"; 1452 1453 /** 1454 * Use with {@link #getSystemService} to retrieve a 1455 * {@link android.telephony.TelephonyManager} for handling management the 1456 * telephony features of the device. 1457 * 1458 * @see #getSystemService 1459 * @see android.telephony.TelephonyManager 1460 */ 1461 public static final String TELEPHONY_SERVICE = "phone"; 1462 1463 /** 1464 * Use with {@link #getSystemService} to retrieve a 1465 * {@link android.text.ClipboardManager} for accessing and modifying 1466 * the contents of the global clipboard. 1467 * 1468 * @see #getSystemService 1469 * @see android.text.ClipboardManager 1470 */ 1471 public static final String CLIPBOARD_SERVICE = "clipboard"; 1472 1473 /** 1474 * Use with {@link #getSystemService} to retrieve a 1475 * {@link android.view.inputmethod.InputMethodManager} for accessing input 1476 * methods. 1477 * 1478 * @see #getSystemService 1479 */ 1480 public static final String INPUT_METHOD_SERVICE = "input_method"; 1481 1482 /** 1483 * Use with {@link #getSystemService} to retrieve a 1484 * {@link android.appwidget.AppWidgetManager} for accessing AppWidgets. 1485 * 1486 * @hide 1487 * @see #getSystemService 1488 */ 1489 public static final String APPWIDGET_SERVICE = "appwidget"; 1490 1491 /** 1492 * Use with {@link #getSystemService} to retrieve an 1493 * {@link android.app.backup.IBackupManager IBackupManager} for communicating 1494 * with the backup mechanism. 1495 * @hide 1496 * 1497 * @see #getSystemService 1498 */ 1499 public static final String BACKUP_SERVICE = "backup"; 1500 1501 /** 1502 * Use with {@link #getSystemService} to retrieve a 1503 * {@link android.os.DropBoxManager} instance for recording 1504 * diagnostic logs. 1505 * @see #getSystemService 1506 */ 1507 public static final String DROPBOX_SERVICE = "dropbox"; 1508 1509 /** 1510 * Use with {@link #getSystemService} to retrieve a 1511 * {@link android.app.admin.DevicePolicyManager} for working with global 1512 * device policy management. 1513 * 1514 * @see #getSystemService 1515 */ 1516 public static final String DEVICE_POLICY_SERVICE = "device_policy"; 1517 1518 /** 1519 * Use with {@link #getSystemService} to retrieve a 1520 * {@link android.app.UiModeManager} for controlling UI modes. 1521 * 1522 * @see #getSystemService 1523 */ 1524 public static final String UI_MODE_SERVICE = "uimode"; 1525 1526 /** 1527 * Determine whether the given permission is allowed for a particular 1528 * process and user ID running in the system. 1529 * 1530 * @param permission The name of the permission being checked. 1531 * @param pid The process ID being checked against. Must be > 0. 1532 * @param uid The user ID being checked against. A uid of 0 is the root 1533 * user, which will pass every permission check. 1534 * 1535 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the given 1536 * pid/uid is allowed that permission, or 1537 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1538 * 1539 * @see PackageManager#checkPermission(String, String) 1540 * @see #checkCallingPermission 1541 */ 1542 public abstract int checkPermission(String permission, int pid, int uid); 1543 1544 /** 1545 * Determine whether the calling process of an IPC you are handling has been 1546 * granted a particular permission. This is basically the same as calling 1547 * {@link #checkPermission(String, int, int)} with the pid and uid returned 1548 * by {@link android.os.Binder#getCallingPid} and 1549 * {@link android.os.Binder#getCallingUid}. One important difference 1550 * is that if you are not currently processing an IPC, this function 1551 * will always fail. This is done to protect against accidentally 1552 * leaking permissions; you can use {@link #checkCallingOrSelfPermission} 1553 * to avoid this protection. 1554 * 1555 * @param permission The name of the permission being checked. 1556 * 1557 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the calling 1558 * pid/uid is allowed that permission, or 1559 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1560 * 1561 * @see PackageManager#checkPermission(String, String) 1562 * @see #checkPermission 1563 * @see #checkCallingOrSelfPermission 1564 */ 1565 public abstract int checkCallingPermission(String permission); 1566 1567 /** 1568 * Determine whether the calling process of an IPC <em>or you</em> have been 1569 * granted a particular permission. This is the same as 1570 * {@link #checkCallingPermission}, except it grants your own permissions 1571 * if you are not currently processing an IPC. Use with care! 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 #checkCallingPermission 1582 */ 1583 public abstract int checkCallingOrSelfPermission(String permission); 1584 1585 /** 1586 * If the given permission is not allowed for a particular process 1587 * and user ID running in the system, throw a {@link SecurityException}. 1588 * 1589 * @param permission The name of the permission being checked. 1590 * @param pid The process ID being checked against. Must be > 0. 1591 * @param uid The user ID being checked against. A uid of 0 is the root 1592 * user, which will pass every permission check. 1593 * @param message A message to include in the exception if it is thrown. 1594 * 1595 * @see #checkPermission(String, int, int) 1596 */ 1597 public abstract void enforcePermission( 1598 String permission, int pid, int uid, String message); 1599 1600 /** 1601 * If the calling process of an IPC you are handling has not been 1602 * granted a particular permission, throw a {@link 1603 * SecurityException}. This is basically the same as calling 1604 * {@link #enforcePermission(String, int, int, String)} with the 1605 * pid and uid returned by {@link android.os.Binder#getCallingPid} 1606 * and {@link android.os.Binder#getCallingUid}. One important 1607 * difference is that if you are not currently processing an IPC, 1608 * this function will always throw the SecurityException. This is 1609 * done to protect against accidentally leaking permissions; you 1610 * can use {@link #enforceCallingOrSelfPermission} to avoid this 1611 * protection. 1612 * 1613 * @param permission The name of the permission being checked. 1614 * @param message A message to include in the exception if it is thrown. 1615 * 1616 * @see #checkCallingPermission(String) 1617 */ 1618 public abstract void enforceCallingPermission( 1619 String permission, String message); 1620 1621 /** 1622 * If neither you nor the calling process of an IPC you are 1623 * handling has been granted a particular permission, throw a 1624 * {@link SecurityException}. This is the same as {@link 1625 * #enforceCallingPermission}, except it grants your own 1626 * permissions if you are not currently processing an IPC. Use 1627 * with care! 1628 * 1629 * @param permission The name of the permission being checked. 1630 * @param message A message to include in the exception if it is thrown. 1631 * 1632 * @see #checkCallingOrSelfPermission(String) 1633 */ 1634 public abstract void enforceCallingOrSelfPermission( 1635 String permission, String message); 1636 1637 /** 1638 * Grant permission to access a specific Uri to another package, regardless 1639 * of whether that package has general permission to access the Uri's 1640 * content provider. This can be used to grant specific, temporary 1641 * permissions, typically in response to user interaction (such as the 1642 * user opening an attachment that you would like someone else to 1643 * display). 1644 * 1645 * <p>Normally you should use {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 1646 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1647 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 1648 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION} with the Intent being used to 1649 * start an activity instead of this function directly. If you use this 1650 * function directly, you should be sure to call 1651 * {@link #revokeUriPermission} when the target should no longer be allowed 1652 * to access it. 1653 * 1654 * <p>To succeed, the content provider owning the Uri must have set the 1655 * {@link android.R.styleable#AndroidManifestProvider_grantUriPermissions 1656 * grantUriPermissions} attribute in its manifest or included the 1657 * {@link android.R.styleable#AndroidManifestGrantUriPermission 1658 * <grant-uri-permissions>} tag. 1659 * 1660 * @param toPackage The package you would like to allow to access the Uri. 1661 * @param uri The Uri you would like to grant access to. 1662 * @param modeFlags The desired access modes. Any combination of 1663 * {@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}. 1667 * 1668 * @see #revokeUriPermission 1669 */ 1670 public abstract void grantUriPermission(String toPackage, Uri uri, 1671 int modeFlags); 1672 1673 /** 1674 * Remove all permissions to access a particular content provider Uri 1675 * that were previously added with {@link #grantUriPermission}. The given 1676 * Uri will match all previously granted Uris that are the same or a 1677 * sub-path of the given Uri. That is, revoking "content://foo/one" will 1678 * revoke both "content://foo/target" and "content://foo/target/sub", but not 1679 * "content://foo". 1680 * 1681 * @param uri The Uri you would like to revoke access to. 1682 * @param modeFlags The desired access modes. Any combination of 1683 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION 1684 * Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1685 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION 1686 * Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1687 * 1688 * @see #grantUriPermission 1689 */ 1690 public abstract void revokeUriPermission(Uri uri, int modeFlags); 1691 1692 /** 1693 * Determine whether a particular process and user ID has been granted 1694 * permission to access a specific URI. This only checks for permissions 1695 * that have been explicitly granted -- if the given process/uid has 1696 * more general access to the URI's content provider then this check will 1697 * always fail. 1698 * 1699 * @param uri The uri that is being checked. 1700 * @param pid The process ID being checked against. Must be > 0. 1701 * @param uid The user ID being checked against. A uid of 0 is the root 1702 * user, which will pass every permission check. 1703 * @param modeFlags The type of access to grant. May be one or both of 1704 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1705 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1706 * 1707 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the given 1708 * pid/uid is allowed to access that uri, or 1709 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1710 * 1711 * @see #checkCallingUriPermission 1712 */ 1713 public abstract int checkUriPermission(Uri uri, int pid, int uid, int modeFlags); 1714 1715 /** 1716 * Determine whether the calling process and user ID has been 1717 * granted permission to access a specific URI. This is basically 1718 * the same as calling {@link #checkUriPermission(Uri, int, int, 1719 * int)} with the pid and uid returned by {@link 1720 * android.os.Binder#getCallingPid} and {@link 1721 * android.os.Binder#getCallingUid}. One important difference is 1722 * that if you are not currently processing an IPC, this function 1723 * will always fail. 1724 * 1725 * @param uri The uri that is being checked. 1726 * @param modeFlags The type of access to grant. May be one or both of 1727 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1728 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1729 * 1730 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 1731 * is allowed to access that uri, or 1732 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1733 * 1734 * @see #checkUriPermission(Uri, int, int, int) 1735 */ 1736 public abstract int checkCallingUriPermission(Uri uri, int modeFlags); 1737 1738 /** 1739 * Determine whether the calling process of an IPC <em>or you</em> has been granted 1740 * permission to access a specific URI. This is the same as 1741 * {@link #checkCallingUriPermission}, except it grants your own permissions 1742 * if you are not currently processing an IPC. Use with care! 1743 * 1744 * @param uri The uri that is being checked. 1745 * @param modeFlags The type of access to grant. May be one or both of 1746 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1747 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1748 * 1749 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 1750 * is allowed to access that uri, or 1751 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1752 * 1753 * @see #checkCallingUriPermission 1754 */ 1755 public abstract int checkCallingOrSelfUriPermission(Uri uri, int modeFlags); 1756 1757 /** 1758 * Check both a Uri and normal permission. This allows you to perform 1759 * both {@link #checkPermission} and {@link #checkUriPermission} in one 1760 * call. 1761 * 1762 * @param uri The Uri whose permission is to be checked, or null to not 1763 * do this check. 1764 * @param readPermission The permission that provides overall read access, 1765 * or null to not do this check. 1766 * @param writePermission The permission that provides overall write 1767 * acess, or null to not do this check. 1768 * @param pid The process ID being checked against. Must be > 0. 1769 * @param uid The user ID being checked against. A uid of 0 is the root 1770 * user, which will pass every permission check. 1771 * @param modeFlags The type of access to grant. May be one or both of 1772 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1773 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1774 * 1775 * @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller 1776 * is allowed to access that uri or holds one of the given permissions, or 1777 * {@link PackageManager#PERMISSION_DENIED} if it is not. 1778 */ 1779 public abstract int checkUriPermission(Uri uri, String readPermission, 1780 String writePermission, int pid, int uid, int modeFlags); 1781 1782 /** 1783 * If a particular process and user ID has not been granted 1784 * permission to access a specific URI, throw {@link 1785 * SecurityException}. This only checks for permissions that have 1786 * been explicitly granted -- if the given process/uid has more 1787 * general access to the URI's content provider then this check 1788 * will always fail. 1789 * 1790 * @param uri The uri that is being checked. 1791 * @param pid The process ID being checked against. Must be > 0. 1792 * @param uid The user ID being checked against. A uid of 0 is the root 1793 * user, which will pass every permission check. 1794 * @param modeFlags The type of access to grant. May be one or both of 1795 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1796 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1797 * @param message A message to include in the exception if it is thrown. 1798 * 1799 * @see #checkUriPermission(Uri, int, int, int) 1800 */ 1801 public abstract void enforceUriPermission( 1802 Uri uri, int pid, int uid, int modeFlags, String message); 1803 1804 /** 1805 * If the calling process and user ID has not been granted 1806 * permission to access a specific URI, throw {@link 1807 * SecurityException}. This is basically the same as calling 1808 * {@link #enforceUriPermission(Uri, int, int, int, String)} with 1809 * the pid and uid returned by {@link 1810 * android.os.Binder#getCallingPid} and {@link 1811 * android.os.Binder#getCallingUid}. One important difference is 1812 * that if you are not currently processing an IPC, this function 1813 * will always throw a SecurityException. 1814 * 1815 * @param uri The uri that is being checked. 1816 * @param modeFlags The type of access to grant. May be one or both of 1817 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1818 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1819 * @param message A message to include in the exception if it is thrown. 1820 * 1821 * @see #checkCallingUriPermission(Uri, int) 1822 */ 1823 public abstract void enforceCallingUriPermission( 1824 Uri uri, int modeFlags, String message); 1825 1826 /** 1827 * If the calling process of an IPC <em>or you</em> has not been 1828 * granted permission to access a specific URI, throw {@link 1829 * SecurityException}. This is the same as {@link 1830 * #enforceCallingUriPermission}, except it grants your own 1831 * permissions if you are not currently processing an IPC. Use 1832 * with care! 1833 * 1834 * @param uri The uri that is being checked. 1835 * @param modeFlags The type of access to grant. May be one or both of 1836 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1837 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1838 * @param message A message to include in the exception if it is thrown. 1839 * 1840 * @see #checkCallingOrSelfUriPermission(Uri, int) 1841 */ 1842 public abstract void enforceCallingOrSelfUriPermission( 1843 Uri uri, int modeFlags, String message); 1844 1845 /** 1846 * Enforce both a Uri and normal permission. This allows you to perform 1847 * both {@link #enforcePermission} and {@link #enforceUriPermission} in one 1848 * call. 1849 * 1850 * @param uri The Uri whose permission is to be checked, or null to not 1851 * do this check. 1852 * @param readPermission The permission that provides overall read access, 1853 * or null to not do this check. 1854 * @param writePermission The permission that provides overall write 1855 * acess, or null to not do this check. 1856 * @param pid The process ID being checked against. Must be > 0. 1857 * @param uid The user ID being checked against. A uid of 0 is the root 1858 * user, which will pass every permission check. 1859 * @param modeFlags The type of access to grant. May be one or both of 1860 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or 1861 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}. 1862 * @param message A message to include in the exception if it is thrown. 1863 * 1864 * @see #checkUriPermission(Uri, String, String, int, int, int) 1865 */ 1866 public abstract void enforceUriPermission( 1867 Uri uri, String readPermission, String writePermission, 1868 int pid, int uid, int modeFlags, String message); 1869 1870 /** 1871 * Flag for use with {@link #createPackageContext}: include the application 1872 * code with the context. This means loading code into the caller's 1873 * process, so that {@link #getClassLoader()} can be used to instantiate 1874 * the application's classes. Setting this flags imposes security 1875 * restrictions on what application context you can access; if the 1876 * requested application can not be safely loaded into your process, 1877 * java.lang.SecurityException will be thrown. If this flag is not set, 1878 * there will be no restrictions on the packages that can be loaded, 1879 * but {@link #getClassLoader} will always return the default system 1880 * class loader. 1881 */ 1882 public static final int CONTEXT_INCLUDE_CODE = 0x00000001; 1883 1884 /** 1885 * Flag for use with {@link #createPackageContext}: ignore any security 1886 * restrictions on the Context being requested, allowing it to always 1887 * be loaded. For use with {@link #CONTEXT_INCLUDE_CODE} to allow code 1888 * to be loaded into a process even when it isn't safe to do so. Use 1889 * with extreme care! 1890 */ 1891 public static final int CONTEXT_IGNORE_SECURITY = 0x00000002; 1892 1893 /** 1894 * Flag for use with {@link #createPackageContext}: a restricted context may 1895 * disable specific features. For instance, a View associated with a restricted 1896 * context would ignore particular XML attributes. 1897 */ 1898 public static final int CONTEXT_RESTRICTED = 0x00000004; 1899 1900 /** 1901 * Return a new Context object for the given application name. This 1902 * Context is the same as what the named application gets when it is 1903 * launched, containing the same resources and class loader. Each call to 1904 * this method returns a new instance of a Context object; Context objects 1905 * are not shared, however they share common state (Resources, ClassLoader, 1906 * etc) so the Context instance itself is fairly lightweight. 1907 * 1908 * <p>Throws {@link PackageManager.NameNotFoundException} if there is no 1909 * application with the given package name. 1910 * 1911 * <p>Throws {@link java.lang.SecurityException} if the Context requested 1912 * can not be loaded into the caller's process for security reasons (see 1913 * {@link #CONTEXT_INCLUDE_CODE} for more information}. 1914 * 1915 * @param packageName Name of the application's package. 1916 * @param flags Option flags, one of {@link #CONTEXT_INCLUDE_CODE} 1917 * or {@link #CONTEXT_IGNORE_SECURITY}. 1918 * 1919 * @return A Context for the application. 1920 * 1921 * @throws java.lang.SecurityException 1922 * @throws PackageManager.NameNotFoundException if there is no application with 1923 * the given package name 1924 */ 1925 public abstract Context createPackageContext(String packageName, 1926 int flags) throws PackageManager.NameNotFoundException; 1927 1928 /** 1929 * Indicates whether this Context is restricted. 1930 * 1931 * @return True if this Context is restricted, false otherwise. 1932 * 1933 * @see #CONTEXT_RESTRICTED 1934 */ 1935 public boolean isRestricted() { 1936 return false; 1937 } 1938} 1939