/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.content;
import android.content.pm.PackageManager;
import android.content.res.AssetManager;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.util.AttributeSet;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
/**
* Interface to global information about an application environment. This is
* an abstract class whose implementation is provided by
* the Android system. It
* allows access to application-specific resources and classes, as well as
* up-calls for application-level operations such as launching activities,
* broadcasting and receiving intents, etc.
*/
public abstract class Context {
/**
* File creation mode: the default mode, where the created file can only
* be accessed by the calling application (or all applications sharing the
* same user ID).
* @see #MODE_WORLD_READABLE
* @see #MODE_WORLD_WRITEABLE
*/
public static final int MODE_PRIVATE = 0x0000;
/**
* File creation mode: allow all other applications to have read access
* to the created file.
* @see #MODE_PRIVATE
* @see #MODE_WORLD_WRITEABLE
*/
public static final int MODE_WORLD_READABLE = 0x0001;
/**
* File creation mode: allow all other applications to have write access
* to the created file.
* @see #MODE_PRIVATE
* @see #MODE_WORLD_READABLE
*/
public static final int MODE_WORLD_WRITEABLE = 0x0002;
/**
* File creation mode: for use with {@link #openFileOutput}, if the file
* already exists then write data to the end of the existing file
* instead of erasing it.
* @see #openFileOutput
*/
public static final int MODE_APPEND = 0x8000;
/**
* Flag for {@link #bindService}: automatically create the service as long
* as the binding exists. Note that while this will create the service,
* its {@link android.app.Service#onStart} method will still only be called due to an
* explicit call to {@link #startService}. Even without that, though,
* this still provides you with access to the service object while the
* service is created.
*
* <p>Specifying this flag also tells the system to treat the service
* as being as important as your own process -- that is, when deciding
* which process should be killed to free memory, the service will only
* be considered a candidate as long as the processes of any such bindings
* is also a candidate to be killed. This is to avoid situations where
* the service is being continually created and killed due to low memory.
*/
public static final int BIND_AUTO_CREATE = 0x0001;
/**
* Flag for {@link #bindService}: include debugging help for mismatched
* calls to unbind. When this flag is set, the callstack of the following
* {@link #unbindService} call is retained, to be printed if a later
* incorrect unbind call is made. Note that doing this requires retaining
* information about the binding that was made for the lifetime of the app,
* resulting in a leak -- this should only be used for debugging.
*/
public static final int BIND_DEBUG_UNBIND = 0x0002;
/** Return an AssetManager instance for your application's package. */
public abstract AssetManager getAssets();
/** Return a Resources instance for your application's package. */
public abstract Resources getResources();
/** Return PackageManager instance to find global package information. */
public abstract PackageManager getPackageManager();
/** Return a ContentResolver instance for your application's package. */
public abstract ContentResolver getContentResolver();
/**
* Return the Looper for the main thread of the current process. This is
* the thread used to dispatch calls to application components (activities,
* services, etc).
*/
public abstract Looper getMainLooper();
/**
* Return the context of the single, global Application object of the
* current process.
*/
public abstract Context getApplicationContext();
/**
* Return a localized, styled CharSequence from the application's package's
* default string table.
*
* @param resId Resource id for the CharSequence text
*/
public final CharSequence getText(int resId) {
return getResources().getText(resId);
}
/**
* Return a localized string from the application's package's
* default string table.
*
* @param resId Resource id for the string
*/
public final String getString(int resId) {
return getResources().getString(resId);
}
/**
* Return a localized formatted string from the application's package's
* default string table, substituting the format arguments as defined in
* {@link java.util.Formatter} and {@link java.lang.String#format}.
*
* @param resId Resource id for the format string
* @param formatArgs The format arguments that will be used for substitution.
*/
public final String getString(int resId, Object... formatArgs) {
return getResources().getString(resId, formatArgs);
}
/**
* Set the base theme for this context. Note that this should be called
* before any views are instantiated in the Context (for example before
* calling {@link android.app.Activity#setContentView} or
* {@link android.view.LayoutInflater#inflate}).
*
* @param resid The style resource describing the theme.
*/
public abstract void setTheme(int resid);
/**
* Return the Theme object associated with this Context.
*/
public abstract Resources.Theme getTheme();
/**
* Retrieve styled attribute information in this Context's theme. See
* {@link Resources.Theme#obtainStyledAttributes(int[])}
* for more information.
*
* @see Resources.Theme#obtainStyledAttributes(int[])
*/
public final TypedArray obtainStyledAttributes(
int[] attrs) {
return getTheme().obtainStyledAttributes(attrs);
}
/**
* Retrieve styled attribute information in this Context's theme. See
* {@link Resources.Theme#obtainStyledAttributes(int, int[])}
* for more information.
*
* @see Resources.Theme#obtainStyledAttributes(int, int[])
*/
public final TypedArray obtainStyledAttributes(
int resid, int[] attrs) throws Resources.NotFoundException {
return getTheme().obtainStyledAttributes(resid, attrs);
}
/**
* Retrieve styled attribute information in this Context's theme. See
* {@link Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)}
* for more information.
*
* @see Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)
*/
public final TypedArray obtainStyledAttributes(
AttributeSet set, int[] attrs) {
return getTheme().obtainStyledAttributes(set, attrs, 0, 0);
}
/**
* Retrieve styled attribute information in this Context's theme. See
* {@link Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)}
* for more information.
*
* @see Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)
*/
public final TypedArray obtainStyledAttributes(
AttributeSet set, int[] attrs, int defStyleAttr, int defStyleRes) {
return getTheme().obtainStyledAttributes(
set, attrs, defStyleAttr, defStyleRes);
}
/**
* Return a class loader you can use to retrieve classes in this package.
*/
public abstract ClassLoader getClassLoader();
/** Return the name of this application's package. */
public abstract String getPackageName();
/**
* {@hide}
* Return the full path to this context's resource files. This is the ZIP files
* containing the application's resources.
*
* <p>Note: this is not generally useful for applications, since they should
* not be directly accessing the file system.
*
*
* @return String Path to the resources.
*/
public abstract String getPackageResourcePath();
/**
* {@hide}
* Return the full path to this context's code and asset files. This is the ZIP files
* containing the application's code and assets.
*
* <p>Note: this is not generally useful for applications, since they should
* not be directly accessing the file system.
*
*
* @return String Path to the code and assets.
*/
public abstract String getPackageCodePath();
/**
* Retrieve and hold the contents of the preferences file 'name', returning
* a SharedPreferences through which you can retrieve and modify its
* values. Only one instance of the SharedPreferences object is returned
* to any callers for the same name, meaning they will see each other's
* edits as soon as they are made.
*
* @param name Desired preferences file. If a preferences file by this name
* does not exist, it will be created when you retrieve an
* editor (SharedPreferences.edit()) and then commit changes (Editor.commit()).
* @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the
* default operation, {@link #MODE_WORLD_READABLE}
* and {@link #MODE_WORLD_WRITEABLE} to control permissions.
*
* @return Returns the single SharedPreferences instance that can be used
* to retrieve and modify the preference values.
*
* @see #MODE_PRIVATE
* @see #MODE_WORLD_READABLE
* @see #MODE_WORLD_WRITEABLE
*/
public abstract SharedPreferences getSharedPreferences(String name,
int mode);
/**
* Open a private file associated with this Context's application package
* for reading.
*
* @param name The name of the file to open; can not contain path
* separators.
*
* @return FileInputStream Resulting input stream.
*
* @see #openFileOutput
* @see #fileList
* @see #deleteFile
* @see java.io.FileInputStream#FileInputStream(String)
*/
public abstract FileInputStream openFileInput(String name)
throws FileNotFoundException;
/**
* Open a private file associated with this Context's application package
* for writing. Creates the file if it doesn't already exist.
*
* @param name The name of the file to open; can not contain path
* separators.
* @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the
* default operation, {@link #MODE_APPEND} to append to an existing file,
* {@link #MODE_WORLD_READABLE} and {@link #MODE_WORLD_WRITEABLE} to control
* permissions.
*
* @return FileOutputStream Resulting output stream.
*
* @see #MODE_APPEND
* @see #MODE_PRIVATE
* @see #MODE_WORLD_READABLE
* @see #MODE_WORLD_WRITEABLE
* @see #openFileInput
* @see #fileList
* @see #deleteFile
* @see java.io.FileOutputStream#FileOutputStream(String)
*/
public abstract FileOutputStream openFileOutput(String name, int mode)
throws FileNotFoundException;
/**
* Delete the given private file associated with this Context's
* application package.
*
* @param name The name of the file to delete; can not contain path
* separators.
*
* @return True if the file was successfully deleted; else
* false.
*
* @see #openFileInput
* @see #openFileOutput
* @see #fileList
* @see java.io.File#delete()
*/
public abstract boolean deleteFile(String name);
/**
* Returns the absolute path on the filesystem where a file created with
* {@link #openFileOutput} is stored.
*
* @param name The name of the file for which you would like to get
* its path.
*
* @return Returns an absolute path to the given file.
*
* @see #openFileOutput
* @see #getFilesDir
* @see #getDir
*/
public abstract File getFileStreamPath(String name);
/**
* Returns the absolute path to the directory on the filesystem where
* files created with {@link #openFileOutput} are stored.
*
* @return Returns the path of the directory holding application files.
*
* @see #openFileOutput
* @see #getFileStreamPath
* @see #getDir
*/
public abstract File getFilesDir();
/**
* Returns the absolute path to the application specific cache directory
* on the filesystem. These files will be ones that get deleted first when the
* device runs low on storage
* There is no guarantee when these files will be deleted.
*
* @return Returns the path of the directory holding application cache files.
*
* @see #openFileOutput
* @see #getFileStreamPath
* @see #getDir
*/
public abstract File getCacheDir();
/**
* Returns an array of strings naming the private files associated with
* this Context's application package.
*
* @return Array of strings naming the private files.
*
* @see #openFileInput
* @see #openFileOutput
* @see #deleteFile
*/
public abstract String[] fileList();
/**
* Retrieve, creating if needed, a new directory in which the application
* can place its own custom data files. You can use the returned File
* object to create and access files in this directory. Note that files
* created through a File object will only be accessible by your own
* application; you can only set the mode of the entire directory, not
* of individual files.
*
* @param name Name of the directory to retrieve. This is a directory
* that is created as part of your application data.
* @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the
* default operation, {@link #MODE_WORLD_READABLE} and
* {@link #MODE_WORLD_WRITEABLE} to control permissions.
*
* @return Returns a File object for the requested directory. The directory
* will have been created if it does not already exist.
*
* @see #openFileOutput(String, int)
*/
public abstract File getDir(String name, int mode);
/**
* Open a new private SQLiteDatabase associated with this Context's
* application package. Create the database file if it doesn't exist.
*
* @param name The name (unique in the application package) of the database.
* @param mode Operating mode. Use 0 or {@link #MODE_PRIVATE} for the
* default operation, {@link #MODE_WORLD_READABLE}
* and {@link #MODE_WORLD_WRITEABLE} to control permissions.
* @param factory An optional factory class that is called to instantiate a
* cursor when query is called.
*
* @return The contents of a newly created database with the given name.
* @throws android.database.sqlite.SQLiteException if the database file could not be opened.
*
* @see #MODE_PRIVATE
* @see #MODE_WORLD_READABLE
* @see #MODE_WORLD_WRITEABLE
* @see #deleteDatabase
*/
public abstract SQLiteDatabase openOrCreateDatabase(String name,
int mode, CursorFactory factory);
/**
* Delete an existing private SQLiteDatabase associated with this Context's
* application package.
*
* @param name The name (unique in the application package) of the
* database.
*
* @return True if the database was successfully deleted; else false.
*
* @see #openOrCreateDatabase
*/
public abstract boolean deleteDatabase(String name);
/**
* Returns the absolute path on the filesystem where a database created with
* {@link #openOrCreateDatabase} is stored.
*
* @param name The name of the database for which you would like to get
* its path.
*
* @return Returns an absolute path to the given database.
*
* @see #openOrCreateDatabase
*/
public abstract File getDatabasePath(String name);
/**
* Returns an array of strings naming the private databases associated with
* this Context's application package.
*
* @return Array of strings naming the private databases.
*
* @see #openOrCreateDatabase
* @see #deleteDatabase
*/
public abstract String[] databaseList();
/**
* Like {@link #peekWallpaper}, but always returns a valid Drawable. If
* no wallpaper is set, the system default wallpaper is returned.
*
* @return Returns a Drawable object that will draw the wallpaper.
*/
public abstract Drawable getWallpaper();
/**
* Retrieve the current system wallpaper. This is returned as an
* abstract Drawable that you can install in a View to display whatever
* wallpaper the user has currently set. If there is no wallpaper set,
* a null pointer is returned.
*
* @return Returns a Drawable object that will draw the wallpaper or a
* null pointer if these is none.
*/
public abstract Drawable peekWallpaper();
/**
* Returns the desired minimum width for the wallpaper. Callers of
* {@link #setWallpaper(android.graphics.Bitmap)} or
* {@link #setWallpaper(java.io.InputStream)} should check this value
* beforehand to make sure the supplied wallpaper respects the desired
* minimum width.
*
* If the returned value is <= 0, the caller should use the width of
* the default display instead.
*
* @return The desired minimum width for the wallpaper. This value should
* be honored by applications that set the wallpaper but it is not
* mandatory.
*/
public abstract int getWallpaperDesiredMinimumWidth();
/**
* Returns the desired minimum height for the wallpaper. Callers of
* {@link #setWallpaper(android.graphics.Bitmap)} or
* {@link #setWallpaper(java.io.InputStream)} should check this value
* beforehand to make sure the supplied wallpaper respects the desired
* minimum height.
*
* If the returned value is <= 0, the caller should use the height of
* the default display instead.
*
* @return The desired minimum height for the wallpaper. This value should
* be honored by applications that set the wallpaper but it is not
* mandatory.
*/
public abstract int getWallpaperDesiredMinimumHeight();
/**
* Change the current system wallpaper to a bitmap. The given bitmap is
* converted to a PNG and stored as the wallpaper. On success, the intent
* {@link Intent#ACTION_WALLPAPER_CHANGED} is broadcast.
*
* @param bitmap The bitmap to save.
*
* @throws IOException If an error occurs reverting to the default
* wallpaper.
*/
public abstract void setWallpaper(Bitmap bitmap) throws IOException;
/**
* Change the current system wallpaper to a specific byte stream. The
* give InputStream is copied into persistent storage and will now be
* used as the wallpaper. Currently it must be either a JPEG or PNG
* image. On success, the intent {@link Intent#ACTION_WALLPAPER_CHANGED}
* is broadcast.
*
* @param data A stream containing the raw data to install as a wallpaper.
*
* @throws IOException If an error occurs reverting to the default
* wallpaper.
*/
public abstract void setWallpaper(InputStream data) throws IOException;
/**
* Remove any currently set wallpaper, reverting to the system's default
* wallpaper. On success, the intent {@link Intent#ACTION_WALLPAPER_CHANGED}
* is broadcast.
*
* @throws IOException If an error occurs reverting to the default
* wallpaper.
*/
public abstract void clearWallpaper() throws IOException;
/**
* Launch a new activity. You will not receive any information about when
* the activity exits.
*
* <p>Note that if this method is being called from outside of an
* {@link android.app.Activity} Context, then the Intent must include
* the {@link Intent#FLAG_ACTIVITY_NEW_TASK} launch flag. This is because,
* without being started from an existing Activity, there is no existing
* task in which to place the new activity and thus it needs to be placed
* in its own separate task.
*
* <p>This method throws {@link ActivityNotFoundException}
* if there was no Activity found to run the given Intent.
*
* @param intent The description of the activity to start.
*
* @throws ActivityNotFoundException
*
* @see PackageManager#resolveActivity
*/
public abstract void startActivity(Intent intent);
/**
* Broadcast the given intent to all interested BroadcastReceivers. This
* call is asynchronous; it returns immediately, and you will continue
* executing while the receivers are run. No results are propagated from
* receivers and receivers can not abort the broadcast. If you want
* to allow receivers to propagate results or abort the broadcast, you must
* send an ordered broadcast using
* {@link #sendOrderedBroadcast(Intent, String)}.
*
* <p>See {@link BroadcastReceiver} for more information on Intent broadcasts.
*
* @param intent The Intent to broadcast; all receivers matching this
* Intent will receive the broadcast.
*
* @see android.content.BroadcastReceiver
* @see #registerReceiver
* @see #sendBroadcast(Intent, String)
* @see #sendOrderedBroadcast(Intent, String)
* @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)
*/
public abstract void sendBroadcast(Intent intent);
/**
* Broadcast the given intent to all interested BroadcastReceivers, allowing
* an optional required permission to be enforced. This
* call is asynchronous; it returns immediately, and you will continue
* executing while the receivers are run. No results are propagated from
* receivers and receivers can not abort the broadcast. If you want
* to allow receivers to propagate results or abort the broadcast, you must
* send an ordered broadcast using
* {@link #sendOrderedBroadcast(Intent, String)}.
*
* <p>See {@link BroadcastReceiver} for more information on Intent broadcasts.
*
* @param intent The Intent to broadcast; all receivers matching this
* Intent will receive the broadcast.
* @param receiverPermission (optional) String naming a permissions that
* a receiver must hold in order to receive your broadcast.
* If null, no permission is required.
*
* @see android.content.BroadcastReceiver
* @see #registerReceiver
* @see #sendBroadcast(Intent)
* @see #sendOrderedBroadcast(Intent, String)
* @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)
*/
public abstract void sendBroadcast(Intent intent,
String receiverPermission);
/**
* Broadcast the given intent to all interested BroadcastReceivers, delivering
* them one at a time to allow more preferred receivers to consume the
* broadcast before it is delivered to less preferred receivers. This
* call is asynchronous; it returns immediately, and you will continue
* executing while the receivers are run.
*
* <p>See {@link BroadcastReceiver} for more information on Intent broadcasts.
*
* @param intent The Intent to broadcast; all receivers matching this
* Intent will receive the broadcast.
* @param receiverPermission (optional) String naming a permissions that
* a receiver must hold in order to receive your broadcast.
* If null, no permission is required.
*
* @see android.content.BroadcastReceiver
* @see #registerReceiver
* @see #sendBroadcast(Intent)
* @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)
*/
public abstract void sendOrderedBroadcast(Intent intent,
String receiverPermission);
/**
* Version of {@link #sendBroadcast(Intent)} that allows you to
* receive data back from the broadcast. This is accomplished by
* supplying your own BroadcastReceiver when calling, which will be
* treated as a final receiver at the end of the broadcast -- its
* {@link BroadcastReceiver#onReceive} method will be called with
* the result values collected from the other receivers. If you use
* an <var>resultReceiver</var> with this method, then the broadcast will
* be serialized in the same way as calling
* {@link #sendOrderedBroadcast(Intent, String)}.
*
* <p>Like {@link #sendBroadcast(Intent)}, this method is
* asynchronous; it will return before
* resultReceiver.onReceive() is called.
*
* <p>See {@link BroadcastReceiver} for more information on Intent broadcasts.
*
* @param intent The Intent to broadcast; all receivers matching this
* Intent will receive the broadcast.
* @param receiverPermission String naming a permissions that
* a receiver must hold in order to receive your broadcast.
* If null, no permission is required.
* @param resultReceiver Your own BroadcastReceiver to treat as the final
* receiver of the broadcast.
* @param scheduler A custom Handler with which to schedule the
* resultReceiver callback; if null it will be
* scheduled in the Context's main thread.
* @param initialCode An initial value for the result code. Often
* Activity.RESULT_OK.
* @param initialData An initial value for the result data. Often
* null.
* @param initialExtras An initial value for the result extras. Often
* null.
*
* @see #sendBroadcast(Intent)
* @see #sendBroadcast(Intent, String)
* @see #sendOrderedBroadcast(Intent, String)
* @see #sendStickyBroadcast(Intent)
* @see android.content.BroadcastReceiver
* @see #registerReceiver
* @see android.app.Activity#RESULT_OK
*/
public abstract void sendOrderedBroadcast(Intent intent,
String receiverPermission, BroadcastReceiver resultReceiver,
Handler scheduler, int initialCode, String initialData,
Bundle initialExtras);
/**
* Perform a {@link #sendBroadcast(Intent)} that is "sticky," meaning the
* Intent you are sending stays around after the broadcast is complete,
* so that others can quickly retrieve that data through the return
* value of {@link #registerReceiver(BroadcastReceiver, IntentFilter)}. In
* all other ways, this behaves the same as
* {@link #sendBroadcast(Intent)}.
*
* <p>You must hold the {@link android.Manifest.permission#BROADCAST_STICKY}
* permission in order to use this API. If you do not hold that
* permission, {@link SecurityException} will be thrown.
*
* @param intent The Intent to broadcast; all receivers matching this
* Intent will receive the broadcast, and the Intent will be held to
* be re-broadcast to future receivers.
*
* @see #sendBroadcast(Intent)
*/
public abstract void sendStickyBroadcast(Intent intent);
/**
* Remove the data previously sent with {@link #sendStickyBroadcast},
* so that it is as if the sticky broadcast had never happened.
*
* <p>You must hold the {@link android.Manifest.permission#BROADCAST_STICKY}
* permission in order to use this API. If you do not hold that
* permission, {@link SecurityException} will be thrown.
*
* @param intent The Intent that was previously broadcast.
*
* @see #sendStickyBroadcast
*/
public abstract void removeStickyBroadcast(Intent intent);
/**
* Register a BroadcastReceiver to be run in the main activity thread. The
* <var>receiver</var> will be called with any broadcast Intent that
* matches <var>filter</var>, in the main application thread.
*
* <p>The system may broadcast Intents that are "sticky" -- these stay
* around after the broadcast as finished, to be sent to any later
* registrations. If your IntentFilter matches one of these sticky
* Intents, that Intent will be returned by this function
* <strong>and</strong> sent to your <var>receiver</var> as if it had just
* been broadcast.
*
* <p>There may be multiple sticky Intents that match <var>filter</var>,
* in which case each of these will be sent to <var>receiver</var>. In
* this case, only one of these can be returned directly by the function;
* which of these that is returned is arbitrarily decided by the system.
*
* <p>If you know the Intent your are registering for is sticky, you can
* supply null for your <var>receiver</var>. In this case, no receiver is
* registered -- the function simply returns the sticky Intent that
* matches <var>filter</var>. In the case of multiple matches, the same
* rules as described above apply.
*
* <p>See {@link BroadcastReceiver} for more information on Intent broadcasts.
*
* <p class="note">Note: this method <em>cannot be called from a
* {@link BroadcastReceiver} component;</em> that is, from a BroadcastReceiver
* that is declared in an application's manifest. It is okay, however, to call
* this method from another BroadcastReceiver that has itself been registered
* at run time with {@link #registerReceiver}, since the lifetime of such a
* registered BroadcastReceiver is tied to the object that registered it.</p>
*
* @param receiver The BroadcastReceiver to handle the broadcast.
* @param filter Selects the Intent broadcasts to be received.
*
* @return The first sticky intent found that matches <var>filter</var>,
* or null if there are none.
*
* @see #registerReceiver(BroadcastReceiver, IntentFilter, String, Handler)
* @see #sendBroadcast
* @see #unregisterReceiver
*/
public abstract Intent registerReceiver(BroadcastReceiver receiver,
IntentFilter filter);
/**
* Register to receive intent broadcasts, to run in the context of
* <var>scheduler</var>. See
* {@link #registerReceiver(BroadcastReceiver, IntentFilter)} for more
* information. This allows you to enforce permissions on who can
* broadcast intents to your receiver, or have the receiver run in
* a different thread than the main application thread.
*
* <p>See {@link BroadcastReceiver} for more information on Intent broadcasts.
*
* @param receiver The BroadcastReceiver to handle the broadcast.
* @param filter Selects the Intent broadcasts to be received.
* @param broadcastPermission String naming a permissions that a
* broadcaster must hold in order to send an Intent to you. If null,
* no permission is required.
* @param scheduler Handler identifying the thread that will receive
* the Intent. If null, the main thread of the process will be used.
*
* @return The first sticky intent found that matches <var>filter</var>,
* or null if there are none.
*
* @see #registerReceiver(BroadcastReceiver, IntentFilter)
* @see #sendBroadcast
* @see #unregisterReceiver
*/
public abstract Intent registerReceiver(BroadcastReceiver receiver,
IntentFilter filter,
String broadcastPermission,
Handler scheduler);
/**
* Unregister a previously registered BroadcastReceiver. <em>All</em>
* filters that have been registered for this BroadcastReceiver will be
* removed.
*
* @param receiver The BroadcastReceiver to unregister.
*
* @see #registerReceiver
*/
public abstract void unregisterReceiver(BroadcastReceiver receiver);
/**
* Request that a given application service be started. The Intent
* can either contain the complete class name of a specific service
* implementation to start, or an abstract definition through the
* action and other fields of the kind of service to start. If this service
* is not already running, it will be instantiated and started (creating a
* process for it if needed); if it is running then it remains running.
*
* <p>Every call to this method will result in a corresponding call to
* the target service's {@link android.app.Service#onStart} method,
* with the <var>intent</var> given here. This provides a convenient way
* to submit jobs to a service without having to bind and call on to its
* interface.
*
* <p>Using startService() overrides the default service lifetime that is
* managed by {@link #bindService}: it requires the service to remain
* running until {@link #stopService} is called, regardless of whether
* any clients are connected to it. Note that calls to startService()
* are not nesting: no matter how many times you call startService(),
* a single call to {@link #stopService} will stop it.
*
* <p>The system attempts to keep running services around as much as
* possible. The only time they should be stopped is if the current
* foreground application is using so many resources that the service needs
* to be killed. If any errors happen in the service's process, it will
* automatically be restarted.
*
* <p>This function will throw {@link SecurityException} if you do not
* have permission to start the given service.
*
* @param service Identifies the service to be started. The Intent may
* specify either an explicit component name to start, or a logical
* description (action, category, etc) to match an
* {@link IntentFilter} published by a service. Additional values
* may be included in the Intent extras to supply arguments along with
* this specific start call.
*
* @return If the service is being started or is already running, the
* {@link ComponentName} of the actual service that was started is
* returned; else if the service does not exist null is returned.
*
* @throws SecurityException
*
* @see #stopService
* @see #bindService
*/
public abstract ComponentName startService(Intent service);
/**
* Request that a given application service be stopped. If the service is
* not running, nothing happens. Otherwise it is stopped. Note that calls
* to startService() are not counted -- this stops the service no matter
* how many times it was started.
*
* <p>Note that if a stopped service still has {@link ServiceConnection}
* objects bound to it with the {@link #BIND_AUTO_CREATE} set, it will
* not be destroyed until all of these bindings are removed. See
* the {@link android.app.Service} documentation for more details on a
* service's lifecycle.
*
* <p>This function will throw {@link SecurityException} if you do not
* have permission to stop the given service.
*
* @param service Description of the service to be stopped. The Intent may
* specify either an explicit component name to start, or a logical
* description (action, category, etc) to match an
* {@link IntentFilter} published by a service.
*
* @return If there is a service matching the given Intent that is already
* running, then it is stopped and true is returned; else false is returned.
*
* @throws SecurityException
*
* @see #startService
*/
public abstract boolean stopService(Intent service);
/**
* Connect to an application service, creating it if needed. This defines
* a dependency between your application and the service. The given
* <var>conn</var> will receive the service object when its created and be
* told if it dies and restarts. The service will be considered required
* by the system only for as long as the calling context exists. For
* example, if this Context is an Activity that is stopped, the service will
* not be required to continue running until the Activity is resumed.
*
* <p>This function will throw {@link SecurityException} if you do not
* have permission to bind to the given service.
*
* <p class="note">Note: this method <em>can not be called from an
* {@link BroadcastReceiver} component</em>. A pattern you can use to
* communicate from an BroadcastReceiver to a Service is to call
* {@link #startService} with the arguments containing the command to be
* sent, with the service calling its
* {@link android.app.Service#stopSelf(int)} method when done executing
* that command. See the API demo App/Service/Service Start Arguments
* Controller for an illustration of this. It is okay, however, to use
* this method from an BroadcastReceiver that has been registered with
* {@link #registerReceiver}, since the lifetime of this BroadcastReceiver
* is tied to another object (the one that registered it).</p>
*
* @param service Identifies the service to connect to. The Intent may
* specify either an explicit component name, or a logical
* description (action, category, etc) to match an
* {@link IntentFilter} published by a service.
* @param conn Receives information as the service is started and stopped.
* @param flags Operation options for the binding. May be 0 or
* {@link #BIND_AUTO_CREATE}.
* @return If you have successfully bound to the service, true is returned;
* false is returned if the connection is not made so you will not
* receive the service object.
*
* @throws SecurityException
*
* @see #unbindService
* @see #startService
* @see #BIND_AUTO_CREATE
*/
public abstract boolean bindService(Intent service, ServiceConnection conn,
int flags);
/**
* Disconnect from an application service. You will no longer receive
* calls as the service is restarted, and the service is now allowed to
* stop at any time.
*
* @param conn The connection interface previously supplied to
* bindService().
*
* @see #bindService
*/
public abstract void unbindService(ServiceConnection conn);
/**
* Start executing an {@link android.app.Instrumentation} class. The given
* Instrumentation component will be run by killing its target application
* (if currently running), starting the target process, instantiating the
* instrumentation component, and then letting it drive the application.
*
* <p>This function is not synchronous -- it returns as soon as the
* instrumentation has started and while it is running.
*
* <p>Instrumentation is normally only allowed to run against a package
* that is either unsigned or signed with a signature that the
* the instrumentation package is also signed with (ensuring the target
* trusts the instrumentation).
*
* @param className Name of the Instrumentation component to be run.
* @param profileFile Optional path to write profiling data as the
* instrumentation runs, or null for no profiling.
* @param arguments Additional optional arguments to pass to the
* instrumentation, or null.
*
* @return Returns true if the instrumentation was successfully started,
* else false if it could not be found.
*/
public abstract boolean startInstrumentation(ComponentName className,
String profileFile, Bundle arguments);
/**
* Return the handle to a system-level service by name. The class of the
* returned object varies by the requested name. Currently available names
* are:
*
* <dl>
* <dt> {@link #WINDOW_SERVICE} ("window")
* <dd> The top-level window manager in which you can place custom
* windows. The returned object is a {@link android.view.WindowManager}.
* <dt> {@link #LAYOUT_INFLATER_SERVICE} ("layout_inflater")
* <dd> A {@link android.view.LayoutInflater} for inflating layout resources
* in this context.
* <dt> {@link #ACTIVITY_SERVICE} ("activity")
* <dd> A {@link android.app.ActivityManager} for interacting with the
* global activity state of the system.
* <dt> {@link #POWER_SERVICE} ("power")
* <dd> A {@link android.os.PowerManager} for controlling power
* management.
* <dt> {@link #ALARM_SERVICE} ("alarm")
* <dd> A {@link android.app.AlarmManager} for receiving intents at the
* time of your choosing.
* <dt> {@link #NOTIFICATION_SERVICE} ("notification")
* <dd> A {@link android.app.NotificationManager} for informing the user
* of background events.
* <dt> {@link #KEYGUARD_SERVICE} ("keyguard")
* <dd> A {@link android.app.KeyguardManager} for controlling keyguard.
* <dt> {@link #LOCATION_SERVICE} ("location")
* <dd> A {@link android.location.LocationManager} for controlling location
* (e.g., GPS) updates.
* <dt> {@link #SEARCH_SERVICE} ("search")
* <dd> A {@link android.app.SearchManager} for handling search.
* <dt> {@link #VIBRATOR_SERVICE} ("vibrator")
* <dd> A {@link android.os.Vibrator} for interacting with the vibrator
* hardware.
* <dt> {@link #CONNECTIVITY_SERVICE} ("connection")
* <dd> A {@link android.net.ConnectivityManager ConnectivityManager} for
* handling management of network connections.
* <dt> {@link #WIFI_SERVICE} ("wifi")
* <dd> A {@link android.net.wifi.WifiManager WifiManager} for management of
* Wi-Fi connectivity.
* <dt> {@link #INPUT_METHOD_SERVICE} ("input_method")
* <dd> An {@link android.view.inputmethod.InputMethodManager InputMethodManager}
* for management of input methods.
* </dl>
*
* <p>Note: System services obtained via this API may be closely associated with
* the Context in which they are obtained from. In general, do not share the
* service objects between various different contexts (Activities, Applications,
* Services, Providers, etc.)
*
* @param name The name of the desired service.
*
* @return The service or null if the name does not exist.
*
* @see #WINDOW_SERVICE
* @see android.view.WindowManager
* @see #LAYOUT_INFLATER_SERVICE
* @see android.view.LayoutInflater
* @see #ACTIVITY_SERVICE
* @see android.app.ActivityManager
* @see #POWER_SERVICE
* @see android.os.PowerManager
* @see #ALARM_SERVICE
* @see android.app.AlarmManager
* @see #NOTIFICATION_SERVICE
* @see android.app.NotificationManager
* @see #KEYGUARD_SERVICE
* @see android.app.KeyguardManager
* @see #LOCATION_SERVICE
* @see android.location.LocationManager
* @see #SEARCH_SERVICE
* @see android.app.SearchManager
* @see #SENSOR_SERVICE
* @see android.hardware.SensorManager
* @see #VIBRATOR_SERVICE
* @see android.os.Vibrator
* @see #CONNECTIVITY_SERVICE
* @see android.net.ConnectivityManager
* @see #WIFI_SERVICE
* @see android.net.wifi.WifiManager
* @see #AUDIO_SERVICE
* @see android.media.AudioManager
* @see #TELEPHONY_SERVICE
* @see android.telephony.TelephonyManager
* @see #INPUT_METHOD_SERVICE
* @see android.view.inputmethod.InputMethodManager
*/
public abstract Object getSystemService(String name);
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.os.PowerManager} for controlling power management,
* including "wake locks," which let you keep the device on while
* you're running long tasks.
*/
public static final String POWER_SERVICE = "power";
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.view.WindowManager} for accessing the system's window
* manager.
*
* @see #getSystemService
* @see android.view.WindowManager
*/
public static final String WINDOW_SERVICE = "window";
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.view.LayoutInflater} for inflating layout resources in this
* context.
*
* @see #getSystemService
* @see android.view.LayoutInflater
*/
public static final String LAYOUT_INFLATER_SERVICE = "layout_inflater";
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.app.ActivityManager} for interacting with the global
* system state.
*
* @see #getSystemService
* @see android.app.ActivityManager
*/
public static final String ACTIVITY_SERVICE = "activity";
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.app.AlarmManager} for receiving intents at a
* time of your choosing.
*
* @see #getSystemService
* @see android.app.AlarmManager
*/
public static final String ALARM_SERVICE = "alarm";
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.app.NotificationManager} for informing the user of
* background events.
*
* @see #getSystemService
* @see android.app.NotificationManager
*/
public static final String NOTIFICATION_SERVICE = "notification";
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.app.NotificationManager} for controlling keyguard.
*
* @see #getSystemService
* @see android.app.KeyguardManager
*/
public static final String KEYGUARD_SERVICE = "keyguard";
/**
* Use with {@link #getSystemService} to retrieve a {@link
* android.location.LocationManager} for controlling location
* updates.
*
* @see #getSystemService
* @see android.location.LocationManager
*/
public static final String LOCATION_SERVICE = "location";
/**
* Use with {@link #getSystemService} to retrieve a {@link
* android.app.SearchManager} for handling searches.
*
* @see #getSystemService
* @see android.app.SearchManager
*/
public static final String SEARCH_SERVICE = "search";
/**
* Use with {@link #getSystemService} to retrieve a {@link
* android.hardware.SensorManager} for accessing sensors.
*
* @see #getSystemService
* @see android.hardware.SensorManager
*/
public static final String SENSOR_SERVICE = "sensor";
/**
* Use with {@link #getSystemService} to retrieve a {@link
* android.bluetooth.BluetoothDevice} for interacting with Bluetooth.
*
* @see #getSystemService
* @see android.bluetooth.BluetoothDevice
* @hide
*/
public static final String BLUETOOTH_SERVICE = "bluetooth";
/**
* Use with {@link #getSystemService} to retrieve a
* com.android.server.WallpaperService for accessing wallpapers.
*
* @see #getSystemService
*/
public static final String WALLPAPER_SERVICE = "wallpaper";
/**
* Use with {@link #getSystemService} to retrieve a {@link
* android.os.Vibrator} for interacting with the vibration hardware.
*
* @see #getSystemService
* @see android.os.Vibrator
*/
public static final String VIBRATOR_SERVICE = "vibrator";
/**
* Use with {@link #getSystemService} to retrieve a {@link
* android.app.StatusBarManager} for interacting with the status bar.
*
* @see #getSystemService
* @see android.app.StatusBarManager
* @hide
*/
public static final String STATUS_BAR_SERVICE = "statusbar";
/**
* Use with {@link #getSystemService} to retrieve a {@link
* android.net.ConnectivityManager} for handling management of
* network connections.
*
* @see #getSystemService
* @see android.net.ConnectivityManager
*/
public static final String CONNECTIVITY_SERVICE = "connectivity";
/**
* Use with {@link #getSystemService} to retrieve a {@link
* android.net.wifi.WifiManager} for handling management of
* Wi-Fi access.
*
* @see #getSystemService
* @see android.net.wifi.WifiManager
*/
public static final String WIFI_SERVICE = "wifi";
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.media.AudioManager} for handling management of volume,
* ringer modes and audio routing.
*
* @see #getSystemService
* @see android.media.AudioManager
*/
public static final String AUDIO_SERVICE = "audio";
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.telephony.TelephonyManager} for handling management the
* telephony features of the device.
*
* @see #getSystemService
* @see android.telephony.TelephonyManager
*/
public static final String TELEPHONY_SERVICE = "phone";
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.text.ClipboardManager} for accessing and modifying
* the contents of the global clipboard.
*
* @see #getSystemService
* @see android.text.ClipboardManager
*/
public static final String CLIPBOARD_SERVICE = "clipboard";
/**
* Use with {@link #getSystemService} to retrieve a
* {@link android.view.inputmethod.InputMethodManager} for accessing input
* methods.
*
* @see #getSystemService
*/
public static final String INPUT_METHOD_SERVICE = "input_method";
/**
* Use with {@link #getSystemService} to retrieve a
* {@blink android.appwidget.AppWidgetManager} for accessing AppWidgets.
*
* @hide
* @see #getSystemService
*/
public static final String APPWIDGET_SERVICE = "appwidget";
/**
* Determine whether the given permission is allowed for a particular
* process and user ID running in the system.
*
* @param permission The name of the permission being checked.
* @param pid The process ID being checked against. Must be > 0.
* @param uid The user ID being checked against. A uid of 0 is the root
* user, which will pass every permission check.
*
* @return Returns {@link PackageManager#PERMISSION_GRANTED} if the given
* pid/uid is allowed that permission, or
* {@link PackageManager#PERMISSION_DENIED} if it is not.
*
* @see PackageManager#checkPermission(String, String)
* @see #checkCallingPermission
*/
public abstract int checkPermission(String permission, int pid, int uid);
/**
* Determine whether the calling process of an IPC you are handling has been
* granted a particular permission. This is basically the same as calling
* {@link #checkPermission(String, int, int)} with the pid and uid returned
* by {@link android.os.Binder#getCallingPid} and
* {@link android.os.Binder#getCallingUid}. One important difference
* is that if you are not currently processing an IPC, this function
* will always fail. This is done to protect against accidentally
* leaking permissions; you can use {@link #checkCallingOrSelfPermission}
* to avoid this protection.
*
* @param permission The name of the permission being checked.
*
* @return Returns {@link PackageManager#PERMISSION_GRANTED} if the calling
* pid/uid is allowed that permission, or
* {@link PackageManager#PERMISSION_DENIED} if it is not.
*
* @see PackageManager#checkPermission(String, String)
* @see #checkPermission
* @see #checkCallingOrSelfPermission
*/
public abstract int checkCallingPermission(String permission);
/**
* Determine whether the calling process of an IPC <em>or you</em> have been
* granted a particular permission. This is the same as
* {@link #checkCallingPermission}, except it grants your own permissions
* if you are not currently processing an IPC. Use with care!
*
* @param permission The name of the permission being checked.
*
* @return Returns {@link PackageManager#PERMISSION_GRANTED} if the calling
* pid/uid is allowed that permission, or
* {@link PackageManager#PERMISSION_DENIED} if it is not.
*
* @see PackageManager#checkPermission(String, String)
* @see #checkPermission
* @see #checkCallingPermission
*/
public abstract int checkCallingOrSelfPermission(String permission);
/**
* If the given permission is not allowed for a particular process
* and user ID running in the system, throw a {@link SecurityException}.
*
* @param permission The name of the permission being checked.
* @param pid The process ID being checked against. Must be > 0.
* @param uid The user ID being checked against. A uid of 0 is the root
* user, which will pass every permission check.
* @param message A message to include in the exception if it is thrown.
*
* @see #checkPermission(String, int, int)
*/
public abstract void enforcePermission(
String permission, int pid, int uid, String message);
/**
* If the calling process of an IPC you are handling has not been
* granted a particular permission, throw a {@link
* SecurityException}. This is basically the same as calling
* {@link #enforcePermission(String, int, int, String)} with the
* pid and uid returned by {@link android.os.Binder#getCallingPid}
* and {@link android.os.Binder#getCallingUid}. One important
* difference is that if you are not currently processing an IPC,
* this function will always throw the SecurityException. This is
* done to protect against accidentally leaking permissions; you
* can use {@link #enforceCallingOrSelfPermission} to avoid this
* protection.
*
* @param permission The name of the permission being checked.
* @param message A message to include in the exception if it is thrown.
*
* @see #checkCallingPermission(String)
*/
public abstract void enforceCallingPermission(
String permission, String message);
/**
* If neither you nor the calling process of an IPC you are
* handling has been granted a particular permission, throw a
* {@link SecurityException}. This is the same as {@link
* #enforceCallingPermission}, except it grants your own
* permissions if you are not currently processing an IPC. Use
* with care!
*
* @param permission The name of the permission being checked.
* @param message A message to include in the exception if it is thrown.
*
* @see #checkCallingOrSelfPermission(String)
*/
public abstract void enforceCallingOrSelfPermission(
String permission, String message);
/**
* Grant permission to access a specific Uri to another package, regardless
* of whether that package has general permission to access the Uri's
* content provider. This can be used to grant specific, temporary
* permissions, typically in response to user interaction (such as the
* user opening an attachment that you would like someone else to
* display).
*
* <p>Normally you should use {@link Intent#FLAG_GRANT_READ_URI_PERMISSION
* Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION
* Intent.FLAG_GRANT_WRITE_URI_PERMISSION} with the Intent being used to
* start an activity instead of this function directly. If you use this
* function directly, you should be sure to call
* {@link #revokeUriPermission} when the target should no longer be allowed
* to access it.
*
* <p>To succeed, the content provider owning the Uri must have set the
* {@link android.R.styleable#AndroidManifestProvider_grantUriPermissions
* grantUriPermissions} attribute in its manifest or included the
* {@link android.R.styleable#AndroidManifestGrantUriPermission
* <grant-uri-permissions>} tag.
*
* @param toPackage The package you would like to allow to access the Uri.
* @param uri The Uri you would like to grant access to.
* @param modeFlags The desired access modes. Any combination of
* {@link Intent#FLAG_GRANT_READ_URI_PERMISSION
* Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION
* Intent.FLAG_GRANT_WRITE_URI_PERMISSION}.
*
* @see #revokeUriPermission
*/
public abstract void grantUriPermission(String toPackage, Uri uri,
int modeFlags);
/**
* Remove all permissions to access a particular content provider Uri
* that were previously added with {@link #grantUriPermission}. The given
* Uri will match all previously granted Uris that are the same or a
* sub-path of the given Uri. That is, revoking "content://foo/one" will
* revoke both "content://foo/target" and "content://foo/target/sub", but not
* "content://foo".
*
* @param uri The Uri you would like to revoke access to.
* @param modeFlags The desired access modes. Any combination of
* {@link Intent#FLAG_GRANT_READ_URI_PERMISSION
* Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION
* Intent.FLAG_GRANT_WRITE_URI_PERMISSION}.
*
* @see #grantUriPermission
*/
public abstract void revokeUriPermission(Uri uri, int modeFlags);
/**
* Determine whether a particular process and user ID has been granted
* permission to access a specific URI. This only checks for permissions
* that have been explicitly granted -- if the given process/uid has
* more general access to the URI's content provider then this check will
* always fail.
*
* @param uri The uri that is being checked.
* @param pid The process ID being checked against. Must be > 0.
* @param uid The user ID being checked against. A uid of 0 is the root
* user, which will pass every permission check.
* @param modeFlags The type of access to grant. May be one or both of
* {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}.
*
* @return Returns {@link PackageManager#PERMISSION_GRANTED} if the given
* pid/uid is allowed to access that uri, or
* {@link PackageManager#PERMISSION_DENIED} if it is not.
*
* @see #checkCallingUriPermission
*/
public abstract int checkUriPermission(Uri uri, int pid, int uid, int modeFlags);
/**
* Determine whether the calling process and user ID has been
* granted permission to access a specific URI. This is basically
* the same as calling {@link #checkUriPermission(Uri, int, int,
* int)} with the pid and uid returned by {@link
* android.os.Binder#getCallingPid} and {@link
* android.os.Binder#getCallingUid}. One important difference is
* that if you are not currently processing an IPC, this function
* will always fail.
*
* @param uri The uri that is being checked.
* @param modeFlags The type of access to grant. May be one or both of
* {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}.
*
* @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller
* is allowed to access that uri, or
* {@link PackageManager#PERMISSION_DENIED} if it is not.
*
* @see #checkUriPermission(Uri, int, int, int)
*/
public abstract int checkCallingUriPermission(Uri uri, int modeFlags);
/**
* Determine whether the calling process of an IPC <em>or you</em> has been granted
* permission to access a specific URI. This is the same as
* {@link #checkCallingUriPermission}, except it grants your own permissions
* if you are not currently processing an IPC. Use with care!
*
* @param uri The uri that is being checked.
* @param modeFlags The type of access to grant. May be one or both of
* {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}.
*
* @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller
* is allowed to access that uri, or
* {@link PackageManager#PERMISSION_DENIED} if it is not.
*
* @see #checkCallingUriPermission
*/
public abstract int checkCallingOrSelfUriPermission(Uri uri, int modeFlags);
/**
* Check both a Uri and normal permission. This allows you to perform
* both {@link #checkPermission} and {@link #checkUriPermission} in one
* call.
*
* @param uri The Uri whose permission is to be checked, or null to not
* do this check.
* @param readPermission The permission that provides overall read access,
* or null to not do this check.
* @param writePermission The permission that provides overall write
* acess, or null to not do this check.
* @param pid The process ID being checked against. Must be > 0.
* @param uid The user ID being checked against. A uid of 0 is the root
* user, which will pass every permission check.
* @param modeFlags The type of access to grant. May be one or both of
* {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}.
*
* @return Returns {@link PackageManager#PERMISSION_GRANTED} if the caller
* is allowed to access that uri or holds one of the given permissions, or
* {@link PackageManager#PERMISSION_DENIED} if it is not.
*/
public abstract int checkUriPermission(Uri uri, String readPermission,
String writePermission, int pid, int uid, int modeFlags);
/**
* If a particular process and user ID has not been granted
* permission to access a specific URI, throw {@link
* SecurityException}. This only checks for permissions that have
* been explicitly granted -- if the given process/uid has more
* general access to the URI's content provider then this check
* will always fail.
*
* @param uri The uri that is being checked.
* @param pid The process ID being checked against. Must be > 0.
* @param uid The user ID being checked against. A uid of 0 is the root
* user, which will pass every permission check.
* @param modeFlags The type of access to grant. May be one or both of
* {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}.
* @param message A message to include in the exception if it is thrown.
*
* @see #checkUriPermission(Uri, int, int, int)
*/
public abstract void enforceUriPermission(
Uri uri, int pid, int uid, int modeFlags, String message);
/**
* If the calling process and user ID has not been granted
* permission to access a specific URI, throw {@link
* SecurityException}. This is basically the same as calling
* {@link #enforceUriPermission(Uri, int, int, int, String)} with
* the pid and uid returned by {@link
* android.os.Binder#getCallingPid} and {@link
* android.os.Binder#getCallingUid}. One important difference is
* that if you are not currently processing an IPC, this function
* will always throw a SecurityException.
*
* @param uri The uri that is being checked.
* @param modeFlags The type of access to grant. May be one or both of
* {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}.
* @param message A message to include in the exception if it is thrown.
*
* @see #checkCallingUriPermission(Uri, int)
*/
public abstract void enforceCallingUriPermission(
Uri uri, int modeFlags, String message);
/**
* If the calling process of an IPC <em>or you</em> has not been
* granted permission to access a specific URI, throw {@link
* SecurityException}. This is the same as {@link
* #enforceCallingUriPermission}, except it grants your own
* permissions if you are not currently processing an IPC. Use
* with care!
*
* @param uri The uri that is being checked.
* @param modeFlags The type of access to grant. May be one or both of
* {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}.
* @param message A message to include in the exception if it is thrown.
*
* @see #checkCallingOrSelfUriPermission(Uri, int)
*/
public abstract void enforceCallingOrSelfUriPermission(
Uri uri, int modeFlags, String message);
/**
* Enforce both a Uri and normal permission. This allows you to perform
* both {@link #enforcePermission} and {@link #enforceUriPermission} in one
* call.
*
* @param uri The Uri whose permission is to be checked, or null to not
* do this check.
* @param readPermission The permission that provides overall read access,
* or null to not do this check.
* @param writePermission The permission that provides overall write
* acess, or null to not do this check.
* @param pid The process ID being checked against. Must be > 0.
* @param uid The user ID being checked against. A uid of 0 is the root
* user, which will pass every permission check.
* @param modeFlags The type of access to grant. May be one or both of
* {@link Intent#FLAG_GRANT_READ_URI_PERMISSION Intent.FLAG_GRANT_READ_URI_PERMISSION} or
* {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION Intent.FLAG_GRANT_WRITE_URI_PERMISSION}.
* @param message A message to include in the exception if it is thrown.
*
* @see #checkUriPermission(Uri, String, String, int, int, int)
*/
public abstract void enforceUriPermission(
Uri uri, String readPermission, String writePermission,
int pid, int uid, int modeFlags, String message);
/**
* Flag for use with {@link #createPackageContext}: include the application
* code with the context. This means loading code into the caller's
* process, so that {@link #getClassLoader()} can be used to instantiate
* the application's classes. Setting this flags imposes security
* restrictions on what application context you can access; if the
* requested application can not be safely loaded into your process,
* java.lang.SecurityException will be thrown. If this flag is not set,
* there will be no restrictions on the packages that can be loaded,
* but {@link #getClassLoader} will always return the default system
* class loader.
*/
public static final int CONTEXT_INCLUDE_CODE = 0x00000001;
/**
* Flag for use with {@link #createPackageContext}: ignore any security
* restrictions on the Context being requested, allowing it to always
* be loaded. For use with {@link #CONTEXT_INCLUDE_CODE} to allow code
* to be loaded into a process even when it isn't safe to do so. Use
* with extreme care!
*/
public static final int CONTEXT_IGNORE_SECURITY = 0x00000002;
/**
* Return a new Context object for the given application name. This
* Context is the same as what the named application gets when it is
* launched, containing the same resources and class loader. Each call to
* this method returns a new instance of a Context object; Context objects
* are not shared, however they share common state (Resources, ClassLoader,
* etc) so the Context instance itself is fairly lightweight.
*
* <p>Throws {@link PackageManager.NameNotFoundException} if there is no
* application with the given package name.
*
* <p>Throws {@link java.lang.SecurityException} if the Context requested
* can not be loaded into the caller's process for security reasons (see
* {@link #CONTEXT_INCLUDE_CODE} for more information}.
*
* @param packageName Name of the application's package.
* @param flags Option flags, one of {@link #CONTEXT_INCLUDE_CODE}
* or {@link #CONTEXT_IGNORE_SECURITY}.
*
* @return A Context for the application.
*
* @throws java.lang.SecurityException
* @throws PackageManager.NameNotFoundException if there is no application with
* the given package name
*/
public abstract Context createPackageContext(String packageName,
int flags) throws PackageManager.NameNotFoundException;
}