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/*
* 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.annotation.AttrRes;
import android.annotation.CheckResult;
import android.annotation.ColorInt;
import android.annotation.ColorRes;
import android.annotation.DrawableRes;
import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.RequiresPermission;
import android.annotation.StringDef;
import android.annotation.StringRes;
import android.annotation.StyleRes;
import android.annotation.StyleableRes;
import android.annotation.SystemApi;
import android.annotation.TestApi;
import android.annotation.UnsupportedAppUsage;
import android.annotation.UserIdInt;
import android.app.ActivityManager;
import android.app.IApplicationThread;
import android.app.IServiceConnection;
import android.app.VrManager;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.res.AssetManager;
import android.content.res.ColorStateList;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.database.DatabaseErrorHandler;
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.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.HandlerExecutor;
import android.os.IBinder;
import android.os.Looper;
import android.os.StatFs;
import android.os.UserHandle;
import android.os.UserManager;
import android.os.storage.StorageManager;
import android.provider.MediaStore;
import android.util.AttributeSet;
import android.view.Display;
import android.view.DisplayAdjustments;
import android.view.View;
import android.view.ViewDebug;
import android.view.WindowManager;
import android.view.autofill.AutofillManager.AutofillClient;
import android.view.textclassifier.TextClassificationManager;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.concurrent.Executor;
/**
* 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 {
/** @hide */
@IntDef(flag = true, prefix = { "MODE_" }, value = {
MODE_PRIVATE,
MODE_WORLD_READABLE,
MODE_WORLD_WRITEABLE,
MODE_APPEND,
})
@Retention(RetentionPolicy.SOURCE)
public @interface FileMode {}
/** @hide */
@IntDef(flag = true, prefix = { "MODE_" }, value = {
MODE_PRIVATE,
MODE_WORLD_READABLE,
MODE_WORLD_WRITEABLE,
MODE_MULTI_PROCESS,
})
@Retention(RetentionPolicy.SOURCE)
public @interface PreferencesMode {}
/** @hide */
@IntDef(flag = true, prefix = { "MODE_" }, value = {
MODE_PRIVATE,
MODE_WORLD_READABLE,
MODE_WORLD_WRITEABLE,
MODE_ENABLE_WRITE_AHEAD_LOGGING,
MODE_NO_LOCALIZED_COLLATORS,
})
@Retention(RetentionPolicy.SOURCE)
public @interface DatabaseMode {}
/**
* 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).
*/
public static final int MODE_PRIVATE = 0x0000;
/**
* File creation mode: allow all other applications to have read access to
* the created file.
* <p>
* Starting from {@link android.os.Build.VERSION_CODES#N}, attempting to use this
* mode throws a {@link SecurityException}.
*
* @deprecated Creating world-readable files is very dangerous, and likely
* to cause security holes in applications. It is strongly
* discouraged; instead, applications should use more formal
* mechanism for interactions such as {@link ContentProvider},
* {@link BroadcastReceiver}, and {@link android.app.Service}.
* There are no guarantees that this access mode will remain on
* a file, such as when it goes through a backup and restore.
* @see android.support.v4.content.FileProvider
* @see Intent#FLAG_GRANT_WRITE_URI_PERMISSION
*/
@Deprecated
public static final int MODE_WORLD_READABLE = 0x0001;
/**
* File creation mode: allow all other applications to have write access to
* the created file.
* <p>
* Starting from {@link android.os.Build.VERSION_CODES#N}, attempting to use this
* mode will throw a {@link SecurityException}.
*
* @deprecated Creating world-writable files is very dangerous, and likely
* to cause security holes in applications. It is strongly
* discouraged; instead, applications should use more formal
* mechanism for interactions such as {@link ContentProvider},
* {@link BroadcastReceiver}, and {@link android.app.Service}.
* There are no guarantees that this access mode will remain on
* a file, such as when it goes through a backup and restore.
* @see android.support.v4.content.FileProvider
* @see Intent#FLAG_GRANT_WRITE_URI_PERMISSION
*/
@Deprecated
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;
/**
* SharedPreference loading flag: when set, the file on disk will
* be checked for modification even if the shared preferences
* instance is already loaded in this process. This behavior is
* sometimes desired in cases where the application has multiple
* processes, all writing to the same SharedPreferences file.
* Generally there are better forms of communication between
* processes, though.
*
* <p>This was the legacy (but undocumented) behavior in and
* before Gingerbread (Android 2.3) and this flag is implied when
* targetting such releases. For applications targetting SDK
* versions <em>greater than</em> Android 2.3, this flag must be
* explicitly set if desired.
*
* @see #getSharedPreferences
*
* @deprecated MODE_MULTI_PROCESS does not work reliably in
* some versions of Android, and furthermore does not provide any
* mechanism for reconciling concurrent modifications across
* processes. Applications should not attempt to use it. Instead,
* they should use an explicit cross-process data management
* approach such as {@link android.content.ContentProvider ContentProvider}.
*/
@Deprecated
public static final int MODE_MULTI_PROCESS = 0x0004;
/**
* Database open flag: when set, the database is opened with write-ahead
* logging enabled by default.
*
* @see #openOrCreateDatabase(String, int, CursorFactory)
* @see #openOrCreateDatabase(String, int, CursorFactory, DatabaseErrorHandler)
* @see SQLiteDatabase#enableWriteAheadLogging
*/
public static final int MODE_ENABLE_WRITE_AHEAD_LOGGING = 0x0008;
/**
* Database open flag: when set, the database is opened without support for
* localized collators.
*
* @see #openOrCreateDatabase(String, int, CursorFactory)
* @see #openOrCreateDatabase(String, int, CursorFactory, DatabaseErrorHandler)
* @see SQLiteDatabase#NO_LOCALIZED_COLLATORS
*/
public static final int MODE_NO_LOCALIZED_COLLATORS = 0x0010;
/** @hide */
@IntDef(flag = true, prefix = { "BIND_" }, value = {
BIND_AUTO_CREATE,
BIND_DEBUG_UNBIND,
BIND_NOT_FOREGROUND,
BIND_ABOVE_CLIENT,
BIND_ALLOW_OOM_MANAGEMENT,
BIND_WAIVE_PRIORITY,
BIND_IMPORTANT,
BIND_ADJUST_WITH_ACTIVITY
})
@Retention(RetentionPolicy.SOURCE)
public @interface BindServiceFlags {}
/**
* 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#onStartCommand}
* 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>Note that prior to {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH},
* not supplying this flag would also impact how important the system
* consider's the target service's process to be. When set, the only way
* for it to be raised was by binding from a service in which case it will
* only be important when that activity is in the foreground. Now to
* achieve this behavior you must explicitly supply the new flag
* {@link #BIND_ADJUST_WITH_ACTIVITY}. For compatibility, old applications
* that don't specify {@link #BIND_AUTO_CREATE} will automatically have
* the flags {@link #BIND_WAIVE_PRIORITY} and
* {@link #BIND_ADJUST_WITH_ACTIVITY} set for them in order to achieve
* the same result.
*/
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;
/**
* Flag for {@link #bindService}: don't allow this binding to raise
* the target service's process to the foreground scheduling priority.
* It will still be raised to at least the same memory priority
* as the client (so that its process will not be killable in any
* situation where the client is not killable), but for CPU scheduling
* purposes it may be left in the background. This only has an impact
* in the situation where the binding client is a foreground process
* and the target service is in a background process.
*/
public static final int BIND_NOT_FOREGROUND = 0x0004;
/**
* Flag for {@link #bindService}: indicates that the client application
* binding to this service considers the service to be more important than
* the app itself. When set, the platform will try to have the out of
* memory killer kill the app before it kills the service it is bound to, though
* this is not guaranteed to be the case.
*/
public static final int BIND_ABOVE_CLIENT = 0x0008;
/**
* Flag for {@link #bindService}: allow the process hosting the bound
* service to go through its normal memory management. It will be
* treated more like a running service, allowing the system to
* (temporarily) expunge the process if low on memory or for some other
* whim it may have, and being more aggressive about making it a candidate
* to be killed (and restarted) if running for a long time.
*/
public static final int BIND_ALLOW_OOM_MANAGEMENT = 0x0010;
/**
* Flag for {@link #bindService}: don't impact the scheduling or
* memory management priority of the target service's hosting process.
* Allows the service's process to be managed on the background LRU list
* just like a regular application process in the background.
*/
public static final int BIND_WAIVE_PRIORITY = 0x0020;
/**
* Flag for {@link #bindService}: this service is very important to
* the client, so should be brought to the foreground process level
* when the client is. Normally a process can only be raised to the
* visibility level by a client, even if that client is in the foreground.
*/
public static final int BIND_IMPORTANT = 0x0040;
/**
* Flag for {@link #bindService}: If binding from an activity, allow the
* target service's process importance to be raised based on whether the
* activity is visible to the user, regardless whether another flag is
* used to reduce the amount that the client process's overall importance
* is used to impact it.
*/
public static final int BIND_ADJUST_WITH_ACTIVITY = 0x0080;
/**
* @hide Flag for {@link #bindService}: allows binding to a service provided
* by an instant app. Note that the caller may not have access to the instant
* app providing the service which is a violation of the instant app sandbox.
* This flag is intended ONLY for development/testing and should be used with
* great care. Only the system is allowed to use this flag.
*/
public static final int BIND_ALLOW_INSTANT = 0x00400000;
/**
* @hide Flag for {@link #bindService}: like {@link #BIND_NOT_FOREGROUND}, but puts it
* up in to the important background state (instead of transient).
*/
public static final int BIND_IMPORTANT_BACKGROUND = 0x00800000;
/**
* @hide Flag for {@link #bindService}: allows application hosting service to manage whitelists
* such as temporary allowing a {@code PendingIntent} to bypass Power Save mode.
*/
public static final int BIND_ALLOW_WHITELIST_MANAGEMENT = 0x01000000;
/**
* @hide Flag for {@link #bindService}: Like {@link #BIND_FOREGROUND_SERVICE},
* but only applies while the device is awake.
*/
public static final int BIND_FOREGROUND_SERVICE_WHILE_AWAKE = 0x02000000;
/**
* @hide Flag for {@link #bindService}: For only the case where the binding
* is coming from the system, set the process state to FOREGROUND_SERVICE
* instead of the normal maximum of IMPORTANT_FOREGROUND. That is, this is
* saying that the process shouldn't participate in the normal power reduction
* modes (removing network access etc).
*/
public static final int BIND_FOREGROUND_SERVICE = 0x04000000;
/**
* @hide Flag for {@link #bindService}: Treat the binding as hosting
* an activity, an unbinding as the activity going in the background.
* That is, when unbinding, the process when empty will go on the activity
* LRU list instead of the regular one, keeping it around more aggressively
* than it otherwise would be. This is intended for use with IMEs to try
* to keep IME processes around for faster keyboard switching.
*/
public static final int BIND_TREAT_LIKE_ACTIVITY = 0x08000000;
/**
* @hide An idea that is not yet implemented.
* Flag for {@link #bindService}: If binding from an activity, consider
* this service to be visible like the binding activity is. That is,
* it will be treated as something more important to keep around than
* invisible background activities. This will impact the number of
* recent activities the user can switch between without having them
* restart. There is no guarantee this will be respected, as the system
* tries to balance such requests from one app vs. the importantance of
* keeping other apps around.
*/
public static final int BIND_VISIBLE = 0x10000000;
/**
* @hide
* Flag for {@link #bindService}: Consider this binding to be causing the target
* process to be showing UI, so it will be do a UI_HIDDEN memory trim when it goes
* away.
*/
public static final int BIND_SHOWING_UI = 0x20000000;
/**
* Flag for {@link #bindService}: Don't consider the bound service to be
* visible, even if the caller is visible.
* @hide
*/
public static final int BIND_NOT_VISIBLE = 0x40000000;
/**
* Flag for {@link #bindService}: The service being bound is an
* {@link android.R.attr#isolatedProcess isolated},
* {@link android.R.attr#externalService external} service. This binds the service into the
* calling application's package, rather than the package in which the service is declared.
* <p>
* When using this flag, the code for the service being bound will execute under the calling
* application's package name and user ID. Because the service must be an isolated process,
* it will not have direct access to the application's data, though.
*
* The purpose of this flag is to allow applications to provide services that are attributed
* to the app using the service, rather than the application providing the service.
* </p>
*/
public static final int BIND_EXTERNAL_SERVICE = 0x80000000;
/** @hide */
@IntDef(flag = true, prefix = { "RECEIVER_VISIBLE_" }, value = {
RECEIVER_VISIBLE_TO_INSTANT_APPS
})
@Retention(RetentionPolicy.SOURCE)
public @interface RegisterReceiverFlags {}
/**
* Flag for {@link #registerReceiver}: The receiver can receive broadcasts from Instant Apps.
*/
public static final int RECEIVER_VISIBLE_TO_INSTANT_APPS = 0x1;
/**
* Returns an AssetManager instance for the application's package.
* <p>
* <strong>Note:</strong> Implementations of this method should return
* an AssetManager instance that is consistent with the Resources instance
* returned by {@link #getResources()}. For example, they should share the
* same {@link Configuration} object.
*
* @return an AssetManager instance for the application's package
* @see #getResources()
*/
public abstract AssetManager getAssets();
/**
* Returns a Resources instance for the application's package.
* <p>
* <strong>Note:</strong> Implementations of this method should return
* a Resources instance that is consistent with the AssetManager instance
* returned by {@link #getAssets()}. For example, they should share the
* same {@link Configuration} object.
*
* @return a Resources instance for the application's package
* @see #getAssets()
*/
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).
* <p>
* By definition, this method returns the same result as would be obtained
* by calling {@link Looper#getMainLooper() Looper.getMainLooper()}.
* </p>
*
* @return The main looper.
*/
public abstract Looper getMainLooper();
/**
* Return an {@link Executor} that will run enqueued tasks on the main
* thread associated with this context. This is the thread used to dispatch
* calls to application components (activities, services, etc).
*/
public Executor getMainExecutor() {
// This is pretty inefficient, which is why ContextImpl overrides it
return new HandlerExecutor(new Handler(getMainLooper()));
}
/**
* Return the context of the single, global Application object of the
* current process. This generally should only be used if you need a
* Context whose lifecycle is separate from the current context, that is
* tied to the lifetime of the process rather than the current component.
*
* <p>Consider for example how this interacts with
* {@link #registerReceiver(BroadcastReceiver, IntentFilter)}:
* <ul>
* <li> <p>If used from an Activity context, the receiver is being registered
* within that activity. This means that you are expected to unregister
* before the activity is done being destroyed; in fact if you do not do
* so, the framework will clean up your leaked registration as it removes
* the activity and log an error. Thus, if you use the Activity context
* to register a receiver that is static (global to the process, not
* associated with an Activity instance) then that registration will be
* removed on you at whatever point the activity you used is destroyed.
* <li> <p>If used from the Context returned here, the receiver is being
* registered with the global state associated with your application. Thus
* it will never be unregistered for you. This is necessary if the receiver
* is associated with static data, not a particular component. However
* using the ApplicationContext elsewhere can easily lead to serious leaks
* if you forget to unregister, unbind, etc.
* </ul>
*/
public abstract Context getApplicationContext();
/** Non-activity related autofill ids are unique in the app */
private static int sLastAutofillId = View.NO_ID;
/**
* Gets the next autofill ID.
*
* <p>All IDs will be smaller or the same as {@link View#LAST_APP_AUTOFILL_ID}. All IDs
* returned will be unique.
*
* @return A ID that is unique in the process
*
* {@hide}
*/
public int getNextAutofillId() {
if (sLastAutofillId == View.LAST_APP_AUTOFILL_ID - 1) {
sLastAutofillId = View.NO_ID;
}
sLastAutofillId++;
return sLastAutofillId;
}
/**
* Add a new {@link ComponentCallbacks} to the base application of the
* Context, which will be called at the same times as the ComponentCallbacks
* methods of activities and other components are called. Note that you
* <em>must</em> be sure to use {@link #unregisterComponentCallbacks} when
* appropriate in the future; this will not be removed for you.
*
* @param callback The interface to call. This can be either a
* {@link ComponentCallbacks} or {@link ComponentCallbacks2} interface.
*/
public void registerComponentCallbacks(ComponentCallbacks callback) {
getApplicationContext().registerComponentCallbacks(callback);
}
/**
* Remove a {@link ComponentCallbacks} object that was previously registered
* with {@link #registerComponentCallbacks(ComponentCallbacks)}.
*/
public void unregisterComponentCallbacks(ComponentCallbacks callback) {
getApplicationContext().unregisterComponentCallbacks(callback);
}
/**
* Return a localized, styled CharSequence from the application's package's
* default string table.
*
* @param resId Resource id for the CharSequence text
*/
@NonNull
public final CharSequence getText(@StringRes int resId) {
return getResources().getText(resId);
}
/**
* Returns a localized string from the application's package's
* default string table.
*
* @param resId Resource id for the string
* @return The string data associated with the resource, stripped of styled
* text information.
*/
@NonNull
public final String getString(@StringRes int resId) {
return getResources().getString(resId);
}
/**
* Returns 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.
* @return The string data associated with the resource, formatted and
* stripped of styled text information.
*/
@NonNull
public final String getString(@StringRes int resId, Object... formatArgs) {
return getResources().getString(resId, formatArgs);
}
/**
* Returns a color associated with a particular resource ID and styled for
* the current theme.
*
* @param id The desired resource identifier, as generated by the aapt
* tool. This integer encodes the package, type, and resource
* entry. The value 0 is an invalid identifier.
* @return A single color value in the form 0xAARRGGBB.
* @throws android.content.res.Resources.NotFoundException if the given ID
* does not exist.
*/
@ColorInt
public final int getColor(@ColorRes int id) {
return getResources().getColor(id, getTheme());
}
/**
* Returns a drawable object associated with a particular resource ID and
* styled for the current theme.
*
* @param id The desired resource identifier, as generated by the aapt
* tool. This integer encodes the package, type, and resource
* entry. The value 0 is an invalid identifier.
* @return An object that can be used to draw this resource.
* @throws android.content.res.Resources.NotFoundException if the given ID
* does not exist.
*/
@Nullable
public final Drawable getDrawable(@DrawableRes int id) {
return getResources().getDrawable(id, getTheme());
}
/**
* Returns a color state list associated with a particular resource ID and
* styled for the current theme.
*
* @param id The desired resource identifier, as generated by the aapt
* tool. This integer encodes the package, type, and resource
* entry. The value 0 is an invalid identifier.
* @return A color state list.
* @throws android.content.res.Resources.NotFoundException if the given ID
* does not exist.
*/
@NonNull
public final ColorStateList getColorStateList(@ColorRes int id) {
return getResources().getColorStateList(id, getTheme());
}
/**
* 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(@StyleRes int resid);
/** @hide Needed for some internal implementation... not public because
* you can't assume this actually means anything. */
@UnsupportedAppUsage
public int getThemeResId() {
return 0;
}
/**
* Return the Theme object associated with this Context.
*/
@ViewDebug.ExportedProperty(deepExport = true)
public abstract Resources.Theme getTheme();
/**
* Retrieve styled attribute information in this Context's theme. See
* {@link android.content.res.Resources.Theme#obtainStyledAttributes(int[])}
* for more information.
*
* @see android.content.res.Resources.Theme#obtainStyledAttributes(int[])
*/
public final TypedArray obtainStyledAttributes(@StyleableRes int[] attrs) {
return getTheme().obtainStyledAttributes(attrs);
}
/**
* Retrieve styled attribute information in this Context's theme. See
* {@link android.content.res.Resources.Theme#obtainStyledAttributes(int, int[])}
* for more information.
*
* @see android.content.res.Resources.Theme#obtainStyledAttributes(int, int[])
*/
public final TypedArray obtainStyledAttributes(
@StyleRes int resid, @StyleableRes int[] attrs) throws Resources.NotFoundException {
return getTheme().obtainStyledAttributes(resid, attrs);
}
/**
* Retrieve styled attribute information in this Context's theme. See
* {@link android.content.res.Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)}
* for more information.
*
* @see android.content.res.Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)
*/
public final TypedArray obtainStyledAttributes(
AttributeSet set, @StyleableRes int[] attrs) {
return getTheme().obtainStyledAttributes(set, attrs, 0, 0);
}
/**
* Retrieve styled attribute information in this Context's theme. See
* {@link android.content.res.Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)}
* for more information.
*
* @see android.content.res.Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)
*/
public final TypedArray obtainStyledAttributes(
AttributeSet set, @StyleableRes int[] attrs, @AttrRes int defStyleAttr,
@StyleRes 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 name of the base context this context is derived from. */
@UnsupportedAppUsage
public abstract String getBasePackageName();
/** @hide Return the package name that should be used for app ops calls from
* this context. This is the same as {@link #getBasePackageName()} except in
* cases where system components are loaded into other app processes, in which
* case this will be the name of the primary package in that process (so that app
* ops uid verification will work with the name). */
@UnsupportedAppUsage
public abstract String getOpPackageName();
/** Return the full application info for this context's package. */
public abstract ApplicationInfo getApplicationInfo();
/**
* Return the full path to this context's primary Android package.
* The Android package is a ZIP file which contains the application's
* primary 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();
/**
* Return the full path to this context's primary Android package.
* The Android package is a ZIP file which contains application's
* primary 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();
/**
* @hide
* @deprecated use {@link #getSharedPreferencesPath(String)}
*/
@Deprecated
@UnsupportedAppUsage
public File getSharedPrefsFile(String name) {
return getSharedPreferencesPath(name);
}
/**
* 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.
*
* This method is thead-safe.
*
* @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.
*
* @return The single {@link SharedPreferences} instance that can be used
* to retrieve and modify the preference values.
*
* @see #MODE_PRIVATE
*/
public abstract SharedPreferences getSharedPreferences(String name, @PreferencesMode int mode);
/**
* Retrieve and hold the contents of the preferences file, 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 file 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.
*
* @return The single {@link SharedPreferences} instance that can be used
* to retrieve and modify the preference values.
*
* @see #getSharedPreferencesPath(String)
* @see #MODE_PRIVATE
* @removed
*/
public abstract SharedPreferences getSharedPreferences(File file, @PreferencesMode int mode);
/**
* Move an existing shared preferences file from the given source storage
* context to this context. This is typically used to migrate data between
* storage locations after an upgrade, such as moving to device protected
* storage.
*
* @param sourceContext The source context which contains the existing
* shared preferences to move.
* @param name The name of the shared preferences file.
* @return {@code true} if the move was successful or if the shared
* preferences didn't exist in the source context, otherwise
* {@code false}.
* @see #createDeviceProtectedStorageContext()
*/
public abstract boolean moveSharedPreferencesFrom(Context sourceContext, String name);
/**
* Delete an existing shared preferences file.
*
* @param name The name (unique in the application package) of the shared
* preferences file.
* @return {@code true} if the shared preferences file was successfully
* deleted; else {@code false}.
* @see #getSharedPreferences(String, int)
*/
public abstract boolean deleteSharedPreferences(String name);
/** @hide */
public abstract void reloadSharedPreferences();
/**
* 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 The resulting {@link FileInputStream}.
*
* @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.
* <p>
* No additional permissions are required for the calling app to read or
* write the returned file.
*
* @param name The name of the file to open; can not contain path
* separators.
* @param mode Operating mode.
* @return The resulting {@link FileOutputStream}.
* @see #MODE_APPEND
* @see #MODE_PRIVATE
* @see #openFileInput
* @see #fileList
* @see #deleteFile
* @see java.io.FileOutputStream#FileOutputStream(String)
*/
public abstract FileOutputStream openFileOutput(String name, @FileMode 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 {@code true} if the file was successfully deleted; else
* {@code 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.
* <p>
* The returned path may change over time if the calling app is moved to an
* adopted storage device, so only relative paths should be persisted.
*
* @param name The name of the file for which you would like to get
* its path.
*
* @return An absolute path to the given file.
*
* @see #openFileOutput
* @see #getFilesDir
* @see #getDir
*/
public abstract File getFileStreamPath(String name);
/**
* Returns the absolute path on the filesystem where a file created with
* {@link #getSharedPreferences(String, int)} is stored.
* <p>
* The returned path may change over time if the calling app is moved to an
* adopted storage device, so only relative paths should be persisted.
*
* @param name The name of the shared preferences for which you would like
* to get a path.
* @return An absolute path to the given file.
* @see #getSharedPreferences(String, int)
* @removed
*/
public abstract File getSharedPreferencesPath(String name);
/**
* Returns the absolute path to the directory on the filesystem where all
* private files belonging to this app are stored. Apps should not use this
* path directly; they should instead use {@link #getFilesDir()},
* {@link #getCacheDir()}, {@link #getDir(String, int)}, or other storage
* APIs on this class.
* <p>
* The returned path may change over time if the calling app is moved to an
* adopted storage device, so only relative paths should be persisted.
* <p>
* No additional permissions are required for the calling app to read or
* write files under the returned path.
*
* @see ApplicationInfo#dataDir
*/
public abstract File getDataDir();
/**
* Returns the absolute path to the directory on the filesystem where files
* created with {@link #openFileOutput} are stored.
* <p>
* The returned path may change over time if the calling app is moved to an
* adopted storage device, so only relative paths should be persisted.
* <p>
* No additional permissions are required for the calling app to read or
* write files under the returned path.
*
* @return The path of the directory holding application files.
* @see #openFileOutput
* @see #getFileStreamPath
* @see #getDir
*/
public abstract File getFilesDir();
/**
* Returns the absolute path to the directory on the filesystem similar to
* {@link #getFilesDir()}. The difference is that files placed under this
* directory will be excluded from automatic backup to remote storage. See
* {@link android.app.backup.BackupAgent BackupAgent} for a full discussion
* of the automatic backup mechanism in Android.
* <p>
* The returned path may change over time if the calling app is moved to an
* adopted storage device, so only relative paths should be persisted.
* <p>
* No additional permissions are required for the calling app to read or
* write files under the returned path.
*
* @return The path of the directory holding application files that will not
* be automatically backed up to remote storage.
* @see #openFileOutput
* @see #getFileStreamPath
* @see #getDir
* @see android.app.backup.BackupAgent
*/
public abstract File getNoBackupFilesDir();
/**
* Returns the absolute path to the directory on the primary shared/external
* storage device where the application can place persistent files it owns.
* These files are internal to the applications, and not typically visible
* to the user as media.
* <p>
* This is like {@link #getFilesDir()} in that these files will be deleted
* when the application is uninstalled, however there are some important
* differences:
* <ul>
* <li>Shared storage may not always be available, since removable media can
* be ejected by the user. Media state can be checked using
* {@link Environment#getExternalStorageState(File)}.
* <li>There is no security enforced with these files. For example, any
* application holding
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} can write to
* these files.
* </ul>
* <p>
* If a shared storage device is emulated (as determined by
* {@link Environment#isExternalStorageEmulated(File)}), it's contents are
* backed by a private user data partition, which means there is little
* benefit to storing data here instead of the private directories returned
* by {@link #getFilesDir()}, etc.
* <p>
* Starting in {@link android.os.Build.VERSION_CODES#KITKAT}, no permissions
* are required to read or write to the returned path; it's always
* accessible to the calling app. This only applies to paths generated for
* package name of the calling application. To access paths belonging to
* other packages,
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} and/or
* {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} are required.
* <p>
* On devices with multiple users (as described by {@link UserManager}),
* each user has their own isolated shared storage. Applications only have
* access to the shared storage for the user they're running as.
* <p>
* The returned path may change over time if different shared storage media
* is inserted, so only relative paths should be persisted.
* <p>
* Here is an example of typical code to manipulate a file in an
* application's shared storage:
* </p>
* {@sample development/samples/ApiDemos/src/com/example/android/apis/content/ExternalStorage.java
* private_file}
* <p>
* If you supply a non-null <var>type</var> to this function, the returned
* file will be a path to a sub-directory of the given type. Though these
* files are not automatically scanned by the media scanner, you can
* explicitly add them to the media database with
* {@link android.media.MediaScannerConnection#scanFile(Context, String[], String[], android.media.MediaScannerConnection.OnScanCompletedListener)
* MediaScannerConnection.scanFile}. Note that this is not the same as
* {@link android.os.Environment#getExternalStoragePublicDirectory
* Environment.getExternalStoragePublicDirectory()}, which provides
* directories of media shared by all applications. The directories returned
* here are owned by the application, and their contents will be removed
* when the application is uninstalled. Unlike
* {@link android.os.Environment#getExternalStoragePublicDirectory
* Environment.getExternalStoragePublicDirectory()}, the directory returned
* here will be automatically created for you.
* <p>
* Here is an example of typical code to manipulate a picture in an
* application's shared storage and add it to the media database:
* </p>
* {@sample development/samples/ApiDemos/src/com/example/android/apis/content/ExternalStorage.java
* private_picture}
*
* @param type The type of files directory to return. May be {@code null}
* for the root of the files directory or one of the following
* constants for a subdirectory:
* {@link android.os.Environment#DIRECTORY_MUSIC},
* {@link android.os.Environment#DIRECTORY_PODCASTS},
* {@link android.os.Environment#DIRECTORY_RINGTONES},
* {@link android.os.Environment#DIRECTORY_ALARMS},
* {@link android.os.Environment#DIRECTORY_NOTIFICATIONS},
* {@link android.os.Environment#DIRECTORY_PICTURES}, or
* {@link android.os.Environment#DIRECTORY_MOVIES}.
* @return the absolute path to application-specific directory. May return
* {@code null} if shared storage is not currently available.
* @see #getFilesDir
* @see #getExternalFilesDirs(String)
* @see Environment#getExternalStorageState(File)
* @see Environment#isExternalStorageEmulated(File)
* @see Environment#isExternalStorageRemovable(File)
*/
@Nullable
public abstract File getExternalFilesDir(@Nullable String type);
/**
* Returns absolute paths to application-specific directories on all
* shared/external storage devices where the application can place
* persistent files it owns. These files are internal to the application,
* and not typically visible to the user as media.
* <p>
* This is like {@link #getFilesDir()} in that these files will be deleted
* when the application is uninstalled, however there are some important
* differences:
* <ul>
* <li>Shared storage may not always be available, since removable media can
* be ejected by the user. Media state can be checked using
* {@link Environment#getExternalStorageState(File)}.
* <li>There is no security enforced with these files. For example, any
* application holding
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} can write to
* these files.
* </ul>
* <p>
* If a shared storage device is emulated (as determined by
* {@link Environment#isExternalStorageEmulated(File)}), it's contents are
* backed by a private user data partition, which means there is little
* benefit to storing data here instead of the private directories returned
* by {@link #getFilesDir()}, etc.
* <p>
* Shared storage devices returned here are considered a stable part of the
* device, including physical media slots under a protective cover. The
* returned paths do not include transient devices, such as USB flash drives
* connected to handheld devices.
* <p>
* An application may store data on any or all of the returned devices. For
* example, an app may choose to store large files on the device with the
* most available space, as measured by {@link StatFs}.
* <p>
* No additional permissions are required for the calling app to read or
* write files under the returned path. Write access outside of these paths
* on secondary external storage devices is not available.
* <p>
* The returned path may change over time if different shared storage media
* is inserted, so only relative paths should be persisted.
*
* @param type The type of files directory to return. May be {@code null}
* for the root of the files directory or one of the following
* constants for a subdirectory:
* {@link android.os.Environment#DIRECTORY_MUSIC},
* {@link android.os.Environment#DIRECTORY_PODCASTS},
* {@link android.os.Environment#DIRECTORY_RINGTONES},
* {@link android.os.Environment#DIRECTORY_ALARMS},
* {@link android.os.Environment#DIRECTORY_NOTIFICATIONS},
* {@link android.os.Environment#DIRECTORY_PICTURES}, or
* {@link android.os.Environment#DIRECTORY_MOVIES}.
* @return the absolute paths to application-specific directories. Some
* individual paths may be {@code null} if that shared storage is
* not currently available. The first path returned is the same as
* {@link #getExternalFilesDir(String)}.
* @see #getExternalFilesDir(String)
* @see Environment#getExternalStorageState(File)
* @see Environment#isExternalStorageEmulated(File)
* @see Environment#isExternalStorageRemovable(File)
*/
public abstract File[] getExternalFilesDirs(String type);
/**
* Return the primary shared/external storage directory where this
* application's OBB files (if there are any) can be found. Note if the
* application does not have any OBB files, this directory may not exist.
* <p>
* This is like {@link #getFilesDir()} in that these files will be deleted
* when the application is uninstalled, however there are some important
* differences:
* <ul>
* <li>Shared storage may not always be available, since removable media can
* be ejected by the user. Media state can be checked using
* {@link Environment#getExternalStorageState(File)}.
* <li>There is no security enforced with these files. For example, any
* application holding
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} can write to
* these files.
* </ul>
* <p>
* Starting in {@link android.os.Build.VERSION_CODES#KITKAT}, no permissions
* are required to read or write to the path that this method returns.
* However, starting from {@link android.os.Build.VERSION_CODES#M},
* to read the OBB expansion files, you must declare the
* {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} permission in the app manifest and ask for
* permission at runtime as follows:
* </p>
* <p>
* {@code <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"
* android:maxSdkVersion="23" />}
* </p>
* <p>
* Starting from {@link android.os.Build.VERSION_CODES#N},
* {@link android.Manifest.permission#READ_EXTERNAL_STORAGE}
* permission is not required, so don’t ask for this
* permission at runtime. To handle both cases, your app must first try to read the OBB file,
* and if it fails, you must request
* {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} permission at runtime.
* </p>
*
* <p>
* The following code snippet shows how to do this:
* </p>
*
* <pre>
* File obb = new File(obb_filename);
* boolean open_failed = false;
*
* try {
* BufferedReader br = new BufferedReader(new FileReader(obb));
* open_failed = false;
* ReadObbFile(br);
* } catch (IOException e) {
* open_failed = true;
* }
*
* if (open_failed) {
* // request READ_EXTERNAL_STORAGE permission before reading OBB file
* ReadObbFileWithPermission();
* }
* </pre>
*
* On devices with multiple users (as described by {@link UserManager}),
* multiple users may share the same OBB storage location. Applications
* should ensure that multiple instances running under different users don't
* interfere with each other.
*
* @return the absolute path to application-specific directory. May return
* {@code null} if shared storage is not currently available.
* @see #getObbDirs()
* @see Environment#getExternalStorageState(File)
* @see Environment#isExternalStorageEmulated(File)
* @see Environment#isExternalStorageRemovable(File)
*/
public abstract File getObbDir();
/**
* Returns absolute paths to application-specific directories on all
* shared/external storage devices where the application's OBB files (if
* there are any) can be found. Note if the application does not have any
* OBB files, these directories may not exist.
* <p>
* This is like {@link #getFilesDir()} in that these files will be deleted
* when the application is uninstalled, however there are some important
* differences:
* <ul>
* <li>Shared storage may not always be available, since removable media can
* be ejected by the user. Media state can be checked using
* {@link Environment#getExternalStorageState(File)}.
* <li>There is no security enforced with these files. For example, any
* application holding
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} can write to
* these files.
* </ul>
* <p>
* Shared storage devices returned here are considered a stable part of the
* device, including physical media slots under a protective cover. The
* returned paths do not include transient devices, such as USB flash drives
* connected to handheld devices.
* <p>
* An application may store data on any or all of the returned devices. For
* example, an app may choose to store large files on the device with the
* most available space, as measured by {@link StatFs}.
* <p>
* No additional permissions are required for the calling app to read or
* write files under the returned path. Write access outside of these paths
* on secondary external storage devices is not available.
*
* @return the absolute paths to application-specific directories. Some
* individual paths may be {@code null} if that shared storage is
* not currently available. The first path returned is the same as
* {@link #getObbDir()}
* @see #getObbDir()
* @see Environment#getExternalStorageState(File)
* @see Environment#isExternalStorageEmulated(File)
* @see Environment#isExternalStorageRemovable(File)
*/
public abstract File[] getObbDirs();
/**
* Returns the absolute path to the application specific cache directory on
* the filesystem.
* <p>
* The system will automatically delete files in this directory as disk
* space is needed elsewhere on the device. The system will always delete
* older files first, as reported by {@link File#lastModified()}. If
* desired, you can exert more control over how files are deleted using
* {@link StorageManager#setCacheBehaviorGroup(File, boolean)} and
* {@link StorageManager#setCacheBehaviorTombstone(File, boolean)}.
* <p>
* Apps are strongly encouraged to keep their usage of cache space below the
* quota returned by
* {@link StorageManager#getCacheQuotaBytes(java.util.UUID)}. If your app
* goes above this quota, your cached files will be some of the first to be
* deleted when additional disk space is needed. Conversely, if your app
* stays under this quota, your cached files will be some of the last to be
* deleted when additional disk space is needed.
* <p>
* Note that your cache quota will change over time depending on how
* frequently the user interacts with your app, and depending on how much
* system-wide disk space is used.
* <p>
* The returned path may change over time if the calling app is moved to an
* adopted storage device, so only relative paths should be persisted.
* <p>
* Apps require no extra permissions to read or write to the returned path,
* since this path lives in their private storage.
*
* @return The path of the directory holding application cache files.
* @see #openFileOutput
* @see #getFileStreamPath
* @see #getDir
* @see #getExternalCacheDir
*/
public abstract File getCacheDir();
/**
* Returns the absolute path to the application specific cache directory on
* the filesystem designed for storing cached code.
* <p>
* The system will delete any files stored in this location both when your
* specific application is upgraded, and when the entire platform is
* upgraded.
* <p>
* This location is optimal for storing compiled or optimized code generated
* by your application at runtime.
* <p>
* The returned path may change over time if the calling app is moved to an
* adopted storage device, so only relative paths should be persisted.
* <p>
* Apps require no extra permissions to read or write to the returned path,
* since this path lives in their private storage.
*
* @return The path of the directory holding application code cache files.
*/
public abstract File getCodeCacheDir();
/**
* Returns absolute path to application-specific directory on the primary
* shared/external storage device where the application can place cache
* files it owns. These files are internal to the application, and not
* typically visible to the user as media.
* <p>
* This is like {@link #getCacheDir()} in that these files will be deleted
* when the application is uninstalled, however there are some important
* differences:
* <ul>
* <li>The platform does not always monitor the space available in shared
* storage, and thus may not automatically delete these files. Apps should
* always manage the maximum space used in this location. Currently the only
* time files here will be deleted by the platform is when running on
* {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1} or later and
* {@link Environment#isExternalStorageEmulated(File)} returns true.
* <li>Shared storage may not always be available, since removable media can
* be ejected by the user. Media state can be checked using
* {@link Environment#getExternalStorageState(File)}.
* <li>There is no security enforced with these files. For example, any
* application holding
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} can write to
* these files.
* </ul>
* <p>
* If a shared storage device is emulated (as determined by
* {@link Environment#isExternalStorageEmulated(File)}), its contents are
* backed by a private user data partition, which means there is little
* benefit to storing data here instead of the private directory returned by
* {@link #getCacheDir()}.
* <p>
* Starting in {@link android.os.Build.VERSION_CODES#KITKAT}, no permissions
* are required to read or write to the returned path; it's always
* accessible to the calling app. This only applies to paths generated for
* package name of the calling application. To access paths belonging to
* other packages,
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} and/or
* {@link android.Manifest.permission#READ_EXTERNAL_STORAGE} are required.
* <p>
* On devices with multiple users (as described by {@link UserManager}),
* each user has their own isolated shared storage. Applications only have
* access to the shared storage for the user they're running as.
* <p>
* The returned path may change over time if different shared storage media
* is inserted, so only relative paths should be persisted.
*
* @return the absolute path to application-specific directory. May return
* {@code null} if shared storage is not currently available.
* @see #getCacheDir
* @see #getExternalCacheDirs()
* @see Environment#getExternalStorageState(File)
* @see Environment#isExternalStorageEmulated(File)
* @see Environment#isExternalStorageRemovable(File)
*/
@Nullable
public abstract File getExternalCacheDir();
/**
* Returns absolute path to application-specific directory in the preloaded cache.
* <p>Files stored in the cache directory can be deleted when the device runs low on storage.
* There is no guarantee when these files will be deleted.
* @hide
*/
@Nullable
@SystemApi
public abstract File getPreloadsFileCache();
/**
* Returns absolute paths to application-specific directories on all
* shared/external storage devices where the application can place cache
* files it owns. These files are internal to the application, and not
* typically visible to the user as media.
* <p>
* This is like {@link #getCacheDir()} in that these files will be deleted
* when the application is uninstalled, however there are some important
* differences:
* <ul>
* <li>The platform does not always monitor the space available in shared
* storage, and thus may not automatically delete these files. Apps should
* always manage the maximum space used in this location. Currently the only
* time files here will be deleted by the platform is when running on
* {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1} or later and
* {@link Environment#isExternalStorageEmulated(File)} returns true.
* <li>Shared storage may not always be available, since removable media can
* be ejected by the user. Media state can be checked using
* {@link Environment#getExternalStorageState(File)}.
* <li>There is no security enforced with these files. For example, any
* application holding
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} can write to
* these files.
* </ul>
* <p>
* If a shared storage device is emulated (as determined by
* {@link Environment#isExternalStorageEmulated(File)}), it's contents are
* backed by a private user data partition, which means there is little
* benefit to storing data here instead of the private directory returned by
* {@link #getCacheDir()}.
* <p>
* Shared storage devices returned here are considered a stable part of the
* device, including physical media slots under a protective cover. The
* returned paths do not include transient devices, such as USB flash drives
* connected to handheld devices.
* <p>
* An application may store data on any or all of the returned devices. For
* example, an app may choose to store large files on the device with the
* most available space, as measured by {@link StatFs}.
* <p>
* No additional permissions are required for the calling app to read or
* write files under the returned path. Write access outside of these paths
* on secondary external storage devices is not available.
* <p>
* The returned paths may change over time if different shared storage media
* is inserted, so only relative paths should be persisted.
*
* @return the absolute paths to application-specific directories. Some
* individual paths may be {@code null} if that shared storage is
* not currently available. The first path returned is the same as
* {@link #getExternalCacheDir()}.
* @see #getExternalCacheDir()
* @see Environment#getExternalStorageState(File)
* @see Environment#isExternalStorageEmulated(File)
* @see Environment#isExternalStorageRemovable(File)
*/
public abstract File[] getExternalCacheDirs();
/**
* Returns absolute paths to application-specific directories on all
* shared/external storage devices where the application can place media
* files. These files are scanned and made available to other apps through
* {@link MediaStore}.
* <p>
* This is like {@link #getExternalFilesDirs} in that these files will be
* deleted when the application is uninstalled, however there are some
* important differences:
* <ul>
* <li>Shared storage may not always be available, since removable media can
* be ejected by the user. Media state can be checked using
* {@link Environment#getExternalStorageState(File)}.
* <li>There is no security enforced with these files. For example, any
* application holding
* {@link android.Manifest.permission#WRITE_EXTERNAL_STORAGE} can write to
* these files.
* </ul>
* <p>
* Shared storage devices returned here are considered a stable part of the
* device, including physical media slots under a protective cover. The
* returned paths do not include transient devices, such as USB flash drives
* connected to handheld devices.
* <p>
* An application may store data on any or all of the returned devices. For
* example, an app may choose to store large files on the device with the
* most available space, as measured by {@link StatFs}.
* <p>
* No additional permissions are required for the calling app to read or
* write files under the returned path. Write access outside of these paths
* on secondary external storage devices is not available.
* <p>
* The returned paths may change over time if different shared storage media
* is inserted, so only relative paths should be persisted.
*
* @return the absolute paths to application-specific directories. Some
* individual paths may be {@code null} if that shared storage is
* not currently available.
* @see Environment#getExternalStorageState(File)
* @see Environment#isExternalStorageEmulated(File)
* @see Environment#isExternalStorageRemovable(File)
*/
public abstract File[] getExternalMediaDirs();
/**
* 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.
* <p>
* The returned path may change over time if the calling app is moved to an
* adopted storage device, so only relative paths should be persisted.
* <p>
* Apps require no extra permissions to read or write to the returned path,
* since this path lives in their private storage.
*
* @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.
*
* @return A {@link 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, @FileMode 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.
* @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_ENABLE_WRITE_AHEAD_LOGGING
* @see #MODE_NO_LOCALIZED_COLLATORS
* @see #deleteDatabase
*/
public abstract SQLiteDatabase openOrCreateDatabase(String name,
@DatabaseMode int mode, CursorFactory factory);
/**
* Open a new private SQLiteDatabase associated with this Context's
* application package. Creates the database file if it doesn't exist.
* <p>
* Accepts input param: a concrete instance of {@link DatabaseErrorHandler}
* to be used to handle corruption when sqlite reports database corruption.
* </p>
*
* @param name The name (unique in the application package) of the database.
* @param mode Operating mode.
* @param factory An optional factory class that is called to instantiate a
* cursor when query is called.
* @param errorHandler the {@link DatabaseErrorHandler} to be used when
* sqlite reports database corruption. if null,
* {@link android.database.DefaultDatabaseErrorHandler} is
* assumed.
* @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_ENABLE_WRITE_AHEAD_LOGGING
* @see #MODE_NO_LOCALIZED_COLLATORS
* @see #deleteDatabase
*/
public abstract SQLiteDatabase openOrCreateDatabase(String name,
@DatabaseMode int mode, CursorFactory factory,
@Nullable DatabaseErrorHandler errorHandler);
/**
* Move an existing database file from the given source storage context to
* this context. This is typically used to migrate data between storage
* locations after an upgrade, such as migrating to device protected
* storage.
* <p>
* The database must be closed before being moved.
*
* @param sourceContext The source context which contains the existing
* database to move.
* @param name The name of the database file.
* @return {@code true} if the move was successful or if the database didn't
* exist in the source context, otherwise {@code false}.
* @see #createDeviceProtectedStorageContext()
*/
public abstract boolean moveDatabaseFrom(Context sourceContext, String name);
/**
* 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 {@code true} if the database was successfully deleted; else {@code 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.
* <p>
* The returned path may change over time if the calling app is moved to an
* adopted storage device, so only relative paths should be persisted.
*
* @param name The name of the database for which you would like to get
* its path.
*
* @return 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();
/**
* @deprecated Use {@link android.app.WallpaperManager#getDrawable
* WallpaperManager.get()} instead.
*/
@Deprecated
public abstract Drawable getWallpaper();
/**
* @deprecated Use {@link android.app.WallpaperManager#peekDrawable
* WallpaperManager.peek()} instead.
*/
@Deprecated
public abstract Drawable peekWallpaper();
/**
* @deprecated Use {@link android.app.WallpaperManager#getDesiredMinimumWidth()
* WallpaperManager.getDesiredMinimumWidth()} instead.
*/
@Deprecated
public abstract int getWallpaperDesiredMinimumWidth();
/**
* @deprecated Use {@link android.app.WallpaperManager#getDesiredMinimumHeight()
* WallpaperManager.getDesiredMinimumHeight()} instead.
*/
@Deprecated
public abstract int getWallpaperDesiredMinimumHeight();
/**
* @deprecated Use {@link android.app.WallpaperManager#setBitmap(Bitmap)
* WallpaperManager.set()} instead.
* <p>This method requires the caller to hold the permission
* {@link android.Manifest.permission#SET_WALLPAPER}.
*/
@Deprecated
public abstract void setWallpaper(Bitmap bitmap) throws IOException;
/**
* @deprecated Use {@link android.app.WallpaperManager#setStream(InputStream)
* WallpaperManager.set()} instead.
* <p>This method requires the caller to hold the permission
* {@link android.Manifest.permission#SET_WALLPAPER}.
*/
@Deprecated
public abstract void setWallpaper(InputStream data) throws IOException;
/**
* @deprecated Use {@link android.app.WallpaperManager#clear
* WallpaperManager.clear()} instead.
* <p>This method requires the caller to hold the permission
* {@link android.Manifest.permission#SET_WALLPAPER}.
*/
@Deprecated
public abstract void clearWallpaper() throws IOException;
/**
* Same as {@link #startActivity(Intent, Bundle)} with no options
* specified.
*
* @param intent The description of the activity to start.
*
* @throws ActivityNotFoundException &nbsp;
*`
* @see #startActivity(Intent, Bundle)
* @see PackageManager#resolveActivity
*/
public abstract void startActivity(@RequiresPermission Intent intent);
/**
* Version of {@link #startActivity(Intent)} that allows you to specify the
* user the activity will be started for. This is not available to applications
* that are not pre-installed on the system image.
* @param intent The description of the activity to start.
* @param user The UserHandle of the user to start this activity for.
* @throws ActivityNotFoundException &nbsp;
* @hide
*/
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
@UnsupportedAppUsage
public void startActivityAsUser(@RequiresPermission Intent intent, UserHandle user) {
throw new RuntimeException("Not implemented. Must override in a subclass.");
}
/**
* 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.
* @param options Additional options for how the Activity should be started.
* May be null if there are no options. See {@link android.app.ActivityOptions}
* for how to build the Bundle supplied here; there are no supported definitions
* for building it manually.
*
* @throws ActivityNotFoundException &nbsp;
*
* @see #startActivity(Intent)
* @see PackageManager#resolveActivity
*/
public abstract void startActivity(@RequiresPermission Intent intent,
@Nullable Bundle options);
/**
* Version of {@link #startActivity(Intent, Bundle)} that allows you to specify the
* user the activity will be started for. This is not available to applications
* that are not pre-installed on the system image.
* @param intent The description of the activity to start.
* @param options Additional options for how the Activity should be started.
* May be null if there are no options. See {@link android.app.ActivityOptions}
* for how to build the Bundle supplied here; there are no supported definitions
* for building it manually.
* @param userId The UserHandle of the user to start this activity for.
* @throws ActivityNotFoundException &nbsp;
* @hide
*/
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
@UnsupportedAppUsage
public void startActivityAsUser(@RequiresPermission Intent intent, @Nullable Bundle options,
UserHandle userId) {
throw new RuntimeException("Not implemented. Must override in a subclass.");
}
/**
* Version of {@link #startActivity(Intent, Bundle)} that returns a result to the caller. This
* is only supported for Views and Fragments.
* @param who The identifier for the calling element that will receive the result.
* @param intent The intent to start.
* @param requestCode The code that will be returned with onActivityResult() identifying this
* request.
* @param options Additional options for how the Activity should be started.
* May be null if there are no options. See {@link android.app.ActivityOptions}
* for how to build the Bundle supplied here; there are no supported definitions
* for building it manually.
* @hide
*/
@UnsupportedAppUsage
public void startActivityForResult(
@NonNull String who, Intent intent, int requestCode, @Nullable Bundle options) {
throw new RuntimeException("This method is only implemented for Activity-based Contexts. "
+ "Check canStartActivityForResult() before calling.");
}
/**
* Identifies whether this Context instance will be able to process calls to
* {@link #startActivityForResult(String, Intent, int, Bundle)}.
* @hide
*/
@UnsupportedAppUsage
public boolean canStartActivityForResult() {
return false;
}
/**
* Same as {@link #startActivities(Intent[], Bundle)} with no options
* specified.
*
* @param intents An array of Intents to be started.
*
* @throws ActivityNotFoundException &nbsp;
*
* @see #startActivities(Intent[], Bundle)
* @see PackageManager#resolveActivity
*/
public abstract void startActivities(@RequiresPermission Intent[] intents);
/**
* Launch multiple new activities. This is generally the same as calling
* {@link #startActivity(Intent)} for the first Intent in the array,
* that activity during its creation calling {@link #startActivity(Intent)}
* for the second entry, etc. Note that unlike that approach, generally
* none of the activities except the last in the array will be created
* at this point, but rather will be created when the user first visits
* them (due to pressing back from the activity on top).
*
* <p>This method throws {@link ActivityNotFoundException}
* if there was no Activity found for <em>any</em> given Intent. In this
* case the state of the activity stack is undefined (some Intents in the
* list may be on it, some not), so you probably want to avoid such situations.
*
* @param intents An array of Intents to be started.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)}
* Context.startActivity(Intent, Bundle)} for more details.
*
* @throws ActivityNotFoundException &nbsp;
*
* @see #startActivities(Intent[])
* @see PackageManager#resolveActivity
*/
public abstract void startActivities(@RequiresPermission Intent[] intents, Bundle options);
/**
* @hide
* Launch multiple new activities. This is generally the same as calling
* {@link #startActivity(Intent)} for the first Intent in the array,
* that activity during its creation calling {@link #startActivity(Intent)}
* for the second entry, etc. Note that unlike that approach, generally
* none of the activities except the last in the array will be created
* at this point, but rather will be created when the user first visits
* them (due to pressing back from the activity on top).
*
* <p>This method throws {@link ActivityNotFoundException}
* if there was no Activity found for <em>any</em> given Intent. In this
* case the state of the activity stack is undefined (some Intents in the
* list may be on it, some not), so you probably want to avoid such situations.
*
* @param intents An array of Intents to be started.
* @param options Additional options for how the Activity should be started.
* @param userHandle The user for whom to launch the activities
* See {@link android.content.Context#startActivity(Intent, Bundle)}
* Context.startActivity(Intent, Bundle)} for more details.
*
* @return The corresponding flag {@link ActivityManager#START_CANCELED},
* {@link ActivityManager#START_SUCCESS} etc. indicating whether the launch was
* successful.
*
* @throws ActivityNotFoundException &nbsp;
*
* @see #startActivities(Intent[])
* @see PackageManager#resolveActivity
*/
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
public int startActivitiesAsUser(Intent[] intents, Bundle options, UserHandle userHandle) {
throw new RuntimeException("Not implemented. Must override in a subclass.");
}
/**
* Same as {@link #startIntentSender(IntentSender, Intent, int, int, int, Bundle)}
* with no options specified.
*
* @param intent The IntentSender to launch.
* @param fillInIntent If non-null, this will be provided as the
* intent parameter to {@link IntentSender#sendIntent}.
* @param flagsMask Intent flags in the original IntentSender that you
* would like to change.
* @param flagsValues Desired values for any bits set in
* <var>flagsMask</var>
* @param extraFlags Always set to 0.
*
* @see #startActivity(Intent)
* @see #startIntentSender(IntentSender, Intent, int, int, int, Bundle)
*/
public abstract void startIntentSender(IntentSender intent, @Nullable Intent fillInIntent,
@Intent.MutableFlags int flagsMask, @Intent.MutableFlags int flagsValues,
int extraFlags) throws IntentSender.SendIntentException;
/**
* Like {@link #startActivity(Intent, Bundle)}, but taking a IntentSender
* to start. If the IntentSender is for an activity, that activity will be started
* as if you had called the regular {@link #startActivity(Intent)}
* here; otherwise, its associated action will be executed (such as
* sending a broadcast) as if you had called
* {@link IntentSender#sendIntent IntentSender.sendIntent} on it.
*
* @param intent The IntentSender to launch.
* @param fillInIntent If non-null, this will be provided as the
* intent parameter to {@link IntentSender#sendIntent}.
* @param flagsMask Intent flags in the original IntentSender that you
* would like to change.
* @param flagsValues Desired values for any bits set in
* <var>flagsMask</var>
* @param extraFlags Always set to 0.
* @param options Additional options for how the Activity should be started.
* See {@link android.content.Context#startActivity(Intent, Bundle)}
* Context.startActivity(Intent, Bundle)} for more details. If options
* have also been supplied by the IntentSender, options given here will
* override any that conflict with those given by the IntentSender.
*
* @see #startActivity(Intent, Bundle)
* @see #startIntentSender(IntentSender, Intent, int, int, int)
*/
public abstract void startIntentSender(IntentSender intent, @Nullable Intent fillInIntent,
@Intent.MutableFlags int flagsMask, @Intent.MutableFlags int flagsValues,
int extraFlags, @Nullable Bundle options) throws IntentSender.SendIntentException;
/**
* 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(@RequiresPermission 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 permission 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(@RequiresPermission Intent intent,
@Nullable String receiverPermission);
/**
* Broadcast the given intent to all interested BroadcastReceivers, allowing
* an array of required permissions 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 receiverPermissions Array of names of permissions that a receiver must hold
* in order to receive your broadcast.
* If null or empty, no permissions are required.
*
* @see android.content.BroadcastReceiver
* @see #registerReceiver
* @see #sendBroadcast(Intent)
* @see #sendOrderedBroadcast(Intent, String)
* @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)
* @hide
*/
public abstract void sendBroadcastMultiplePermissions(Intent intent,
String[] receiverPermissions);
/**
* Broadcast the given intent to all interested BroadcastReceivers, allowing
* an array of required permissions 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 user The user to send the broadcast to.
* @param receiverPermissions Array of names of permissions that a receiver must hold
* in order to receive your broadcast.
* If null or empty, no permissions are required.
*
* @see android.content.BroadcastReceiver
* @see #registerReceiver
* @see #sendBroadcast(Intent)
* @see #sendOrderedBroadcast(Intent, String)
* @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)
* @hide
*/
public abstract void sendBroadcastAsUserMultiplePermissions(Intent intent, UserHandle user,
String[] receiverPermissions);
/**
* 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 permission that
* a receiver must hold in order to receive your broadcast.
* If null, no permission is required.
* @param options (optional) Additional sending options, generated from a
* {@link android.app.BroadcastOptions}.
*
* @see android.content.BroadcastReceiver
* @see #registerReceiver
* @see #sendBroadcast(Intent)
* @see #sendOrderedBroadcast(Intent, String)
* @see #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)
* @hide
*/
@SystemApi
public abstract void sendBroadcast(Intent intent,
@Nullable String receiverPermission,
@Nullable Bundle options);
/**
* Like {@link #sendBroadcast(Intent, String)}, but also allows specification
* of an associated app op as per {@link android.app.AppOpsManager}.
* @hide
*/
@UnsupportedAppUsage
public abstract void sendBroadcast(Intent intent,
String receiverPermission, int appOp);
/**
* 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(@RequiresPermission Intent intent,
@Nullable 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. 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 android.content.BroadcastReceiver
* @see #registerReceiver
* @see android.app.Activity#RESULT_OK
*/
public abstract void sendOrderedBroadcast(@RequiresPermission @NonNull Intent intent,
@Nullable String receiverPermission, @Nullable BroadcastReceiver resultReceiver,
@Nullable Handler scheduler, int initialCode, @Nullable String initialData,
@Nullable Bundle initialExtras);
/**
* 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. 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 options (optional) Additional sending options, generated from a
* {@link android.app.BroadcastOptions}.
* @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 android.content.BroadcastReceiver
* @see #registerReceiver
* @see android.app.Activity#RESULT_OK
* @hide
*/
@SystemApi
public abstract void sendOrderedBroadcast(@NonNull Intent intent,
@Nullable String receiverPermission, @Nullable Bundle options,
@Nullable BroadcastReceiver resultReceiver, @Nullable Handler scheduler,
int initialCode, @Nullable String initialData, @Nullable Bundle initialExtras);
/**
* Like {@link #sendOrderedBroadcast(Intent, String, BroadcastReceiver, android.os.Handler,
* int, String, android.os.Bundle)}, but also allows specification
* of an associated app op as per {@link android.app.AppOpsManager}.
* @hide
*/
@UnsupportedAppUsage
public abstract void sendOrderedBroadcast(Intent intent,
String receiverPermission, int appOp, BroadcastReceiver resultReceiver,
Handler scheduler, int initialCode, String initialData,
Bundle initialExtras);
/**
* Version of {@link #sendBroadcast(Intent)} that allows you to specify the
* user the broadcast will be sent to. This is not available to applications
* that are not pre-installed on the system image.
* @param intent The intent to broadcast
* @param user UserHandle to send the intent to.
* @see #sendBroadcast(Intent)
*/
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
public abstract void sendBroadcastAsUser(@RequiresPermission Intent intent,
UserHandle user);
/**
* Version of {@link #sendBroadcast(Intent, String)} that allows you to specify the
* user the broadcast will be sent to. This is not available to applications
* that are not pre-installed on the system image.
*
* @param intent The Intent to broadcast; all receivers matching this
* Intent will receive the broadcast.
* @param user UserHandle to send the intent to.
* @param receiverPermission (optional) String naming a permission that
* a receiver must hold in order to receive your broadcast.
* If null, no permission is required.
*
* @see #sendBroadcast(Intent, String)
*/
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
public abstract void sendBroadcastAsUser(@RequiresPermission Intent intent,
UserHandle user, @Nullable String receiverPermission);
/**
* Version of {@link #sendBroadcast(Intent, String, Bundle)} that allows you to specify the
* user the broadcast will be sent to. This is not available to applications
* that are not pre-installed on the system image.
*
* @param intent The Intent to broadcast; all receivers matching this
* Intent will receive the broadcast.
* @param user UserHandle to send the intent to.
* @param receiverPermission (optional) String naming a permission that
* a receiver must hold in order to receive your broadcast.
* If null, no permission is required.
* @param options (optional) Additional sending options, generated from a
* {@link android.app.BroadcastOptions}.
*
* @see #sendBroadcast(Intent, String, Bundle)
* @hide
*/
@SystemApi
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
public abstract void sendBroadcastAsUser(@RequiresPermission Intent intent,
UserHandle user, @Nullable String receiverPermission, @Nullable Bundle options);
/**
* Version of {@link #sendBroadcast(Intent, String)} that allows you to specify the
* user the broadcast will be sent to. This is not available to applications
* that are not pre-installed on the system image.
*
* @param intent The Intent to broadcast; all receivers matching this
* Intent will receive the broadcast.
* @param user UserHandle to send the intent to.
* @param receiverPermission (optional) String naming a permission that
* a receiver must hold in order to receive your broadcast.
* If null, no permission is required.
* @param appOp The app op associated with the broadcast.
*
* @see #sendBroadcast(Intent, String)
*
* @hide
*/
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
@UnsupportedAppUsage
public abstract void sendBroadcastAsUser(@RequiresPermission Intent intent,
UserHandle user, @Nullable String receiverPermission, int appOp);
/**
* Version of
* {@link #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)}
* that allows you to specify the
* user the broadcast will be sent to. This is not available to applications
* that are not pre-installed on the system image.
*
* <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 user UserHandle to send the intent to.
* @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 #sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)
*/
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
public abstract void sendOrderedBroadcastAsUser(@RequiresPermission Intent intent,
UserHandle user, @Nullable String receiverPermission, BroadcastReceiver resultReceiver,
@Nullable Handler scheduler, int initialCode, @Nullable String initialData,
@Nullable Bundle initialExtras);
/**
* Similar to above but takes an appOp as well, to enforce restrictions.
* @see #sendOrderedBroadcastAsUser(Intent, UserHandle, String,
* BroadcastReceiver, Handler, int, String, Bundle)
* @hide
*/
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
@UnsupportedAppUsage
public abstract void sendOrderedBroadcastAsUser(Intent intent, UserHandle user,
@Nullable String receiverPermission, int appOp, BroadcastReceiver resultReceiver,
@Nullable Handler scheduler, int initialCode, @Nullable String initialData,
@Nullable Bundle initialExtras);
/**
* Similar to above but takes an appOp as well, to enforce restrictions, and an options Bundle.
* @see #sendOrderedBroadcastAsUser(Intent, UserHandle, String,
* BroadcastReceiver, Handler, int, String, Bundle)
* @hide
*/
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
@UnsupportedAppUsage
public abstract void sendOrderedBroadcastAsUser(Intent intent, UserHandle user,
@Nullable String receiverPermission, int appOp, @Nullable Bundle options,
BroadcastReceiver resultReceiver, @Nullable Handler scheduler, int initialCode,
@Nullable String initialData, @Nullable Bundle initialExtras);
/**
* <p>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)}.
*
* @deprecated Sticky broadcasts should not be used. They provide no security (anyone
* can access them), no protection (anyone can modify them), and many other problems.
* The recommended pattern is to use a non-sticky broadcast to report that <em>something</em>
* has changed, with another mechanism for apps to retrieve the current value whenever
* desired.
*
* @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)
* @see #sendStickyOrderedBroadcast(Intent, BroadcastReceiver, Handler, int, String, Bundle)
*/
@Deprecated
@RequiresPermission(android.Manifest.permission.BROADCAST_STICKY)
public abstract void sendStickyBroadcast(@RequiresPermission Intent intent);
/**
* <p>Version of {@link #sendStickyBroadcast} 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. 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. Note that the sticky data
* stored is only the data you initially supply to the broadcast, not
* the result of any changes made by the receivers.
*
* <p>See {@link BroadcastReceiver} for more information on Intent broadcasts.
*
* @deprecated Sticky broadcasts should not be used. They provide no security (anyone
* can access them), no protection (anyone can modify them), and many other problems.
* The recommended pattern is to use a non-sticky broadcast to report that <em>something</em>
* has changed, with another mechanism for apps to retrieve the current value whenever
* desired.
*
* @param intent The Intent to broadcast; all receivers matching this
* Intent will receive the broadcast.
* @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
*/
@Deprecated
@RequiresPermission(android.Manifest.permission.BROADCAST_STICKY)
public abstract void sendStickyOrderedBroadcast(@RequiresPermission Intent intent,
BroadcastReceiver resultReceiver,
@Nullable Handler scheduler, int initialCode, @Nullable String initialData,
@Nullable Bundle initialExtras);
/**
* <p>Remove the data previously sent with {@link #sendStickyBroadcast},
* so that it is as if the sticky broadcast had never happened.
*
* @deprecated Sticky broadcasts should not be used. They provide no security (anyone
* can access them), no protection (anyone can modify them), and many other problems.
* The recommended pattern is to use a non-sticky broadcast to report that <em>something</em>
* has changed, with another mechanism for apps to retrieve the current value whenever
* desired.
*
* @param intent The Intent that was previously broadcast.
*
* @see #sendStickyBroadcast
*/
@Deprecated
@RequiresPermission(android.Manifest.permission.BROADCAST_STICKY)
public abstract void removeStickyBroadcast(@RequiresPermission Intent intent);
/**
* <p>Version of {@link #sendStickyBroadcast(Intent)} that allows you to specify the
* user the broadcast will be sent to. This is not available to applications
* that are not pre-installed on the system image.
*
* @deprecated Sticky broadcasts should not be used. They provide no security (anyone
* can access them), no protection (anyone can modify them), and many other problems.
* The recommended pattern is to use a non-sticky broadcast to report that <em>something</em>
* has changed, with another mechanism for apps to retrieve the current value whenever
* desired.
*
* @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.
* @param user UserHandle to send the intent to.
*
* @see #sendBroadcast(Intent)
*/
@Deprecated
@RequiresPermission(allOf = {
android.Manifest.permission.INTERACT_ACROSS_USERS,
android.Manifest.permission.BROADCAST_STICKY
})
public abstract void sendStickyBroadcastAsUser(@RequiresPermission Intent intent,
UserHandle user);
/**
* @hide
* This is just here for sending CONNECTIVITY_ACTION.
*/
@Deprecated
@RequiresPermission(allOf = {
android.Manifest.permission.INTERACT_ACROSS_USERS,
android.Manifest.permission.BROADCAST_STICKY
})
public abstract void sendStickyBroadcastAsUser(@RequiresPermission Intent intent,
UserHandle user, Bundle options);
/**
* <p>Version of
* {@link #sendStickyOrderedBroadcast(Intent, BroadcastReceiver, Handler, int, String, Bundle)}
* that allows you to specify the
* user the broadcast will be sent to. This is not available to applications
* that are not pre-installed on the system image.
*
* <p>See {@link BroadcastReceiver} for more information on Intent broadcasts.
*
* @deprecated Sticky broadcasts should not be used. They provide no security (anyone
* can access them), no protection (anyone can modify them), and many other problems.
* The recommended pattern is to use a non-sticky broadcast to report that <em>something</em>
* has changed, with another mechanism for apps to retrieve the current value whenever
* desired.
*
* @param intent The Intent to broadcast; all receivers matching this
* Intent will receive the broadcast.
* @param user UserHandle to send the intent to.
* @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 #sendStickyOrderedBroadcast(Intent, BroadcastReceiver, Handler, int, String, Bundle)
*/
@Deprecated
@RequiresPermission(allOf = {
android.Manifest.permission.INTERACT_ACROSS_USERS,
android.Manifest.permission.BROADCAST_STICKY
})
public abstract void sendStickyOrderedBroadcastAsUser(@RequiresPermission Intent intent,
UserHandle user, BroadcastReceiver resultReceiver,
@Nullable Handler scheduler, int initialCode, @Nullable String initialData,
@Nullable Bundle initialExtras);
/**
* <p>Version of {@link #removeStickyBroadcast(Intent)} that allows you to specify the
* user the broadcast will be sent to. This is not available to applications
* that are not pre-installed on the system image.
*
* <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.
*
* @deprecated Sticky broadcasts should not be used. They provide no security (anyone
* can access them), no protection (anyone can modify them), and many other problems.
* The recommended pattern is to use a non-sticky broadcast to report that <em>something</em>
* has changed, with another mechanism for apps to retrieve the current value whenever
* desired.
*
* @param intent The Intent that was previously broadcast.
* @param user UserHandle to remove the sticky broadcast from.
*
* @see #sendStickyBroadcastAsUser
*/
@Deprecated
@RequiresPermission(allOf = {
android.Manifest.permission.INTERACT_ACROSS_USERS,
android.Manifest.permission.BROADCAST_STICKY
})
public abstract void removeStickyBroadcastAsUser(@RequiresPermission Intent intent,
UserHandle user);
/**
* 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 has 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>As of {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH}, receivers
* registered with this method will correctly respect the
* {@link Intent#setPackage(String)} specified for an Intent being broadcast.
* Prior to that, it would be ignored and delivered to all matching registered
* receivers. Be careful if using this for security.</p>
*
* <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
*/
@Nullable
public abstract Intent registerReceiver(@Nullable BroadcastReceiver receiver,
IntentFilter filter);
/**
* Register to receive intent broadcasts, with the receiver optionally being
* exposed to Instant Apps. See
* {@link #registerReceiver(BroadcastReceiver, IntentFilter)} for more
* information. By default Instant Apps cannot interact with receivers in other
* applications, this allows you to expose a receiver that Instant Apps can
* interact with.
*
* <p>See {@link BroadcastReceiver} for more information on Intent broadcasts.
*
* <p>As of {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH}, receivers
* registered with this method will correctly respect the
* {@link Intent#setPackage(String)} specified for an Intent being broadcast.
* Prior to that, it would be ignored and delivered to all matching registered
* receivers. Be careful if using this for security.</p>
*
* @param receiver The BroadcastReceiver to handle the broadcast.
* @param filter Selects the Intent broadcasts to be received.
* @param flags Additional options for the receiver. May be 0 or
* {@link #RECEIVER_VISIBLE_TO_INSTANT_APPS}.
*
* @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
*/
@Nullable
public abstract Intent registerReceiver(@Nullable BroadcastReceiver receiver,
IntentFilter filter,
@RegisterReceiverFlags int flags);
/**
* 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.
*
* <p>As of {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH}, receivers
* registered with this method will correctly respect the
* {@link Intent#setPackage(String)} specified for an Intent being broadcast.
* Prior to that, it would be ignored and delivered to all matching registered
* receivers. Be careful if using this for security.</p>
*
* @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
*/
@Nullable
public abstract Intent registerReceiver(BroadcastReceiver receiver,
IntentFilter filter, @Nullable String broadcastPermission,
@Nullable Handler scheduler);
/**
* Register to receive intent broadcasts, to run in the context of
* <var>scheduler</var>. See
* {@link #registerReceiver(BroadcastReceiver, IntentFilter, int)} and
* {@link #registerReceiver(BroadcastReceiver, IntentFilter, String, Handler)}
* for more information.
*
* <p>See {@link BroadcastReceiver} for more information on Intent broadcasts.
*
* <p>As of {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH}, receivers
* registered with this method will correctly respect the
* {@link Intent#setPackage(String)} specified for an Intent being broadcast.
* Prior to that, it would be ignored and delivered to all matching registered
* receivers. Be careful if using this for security.</p>
*
* @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.
* @param flags Additional options for the receiver. May be 0 or
* {@link #RECEIVER_VISIBLE_TO_INSTANT_APPS}.
*
* @return The first sticky intent found that matches <var>filter</var>,
* or null if there are none.
*
* @see #registerReceiver(BroadcastReceiver, IntentFilter, int)
* @see #registerReceiver(BroadcastReceiver, IntentFilter, String, Handler)
* @see #sendBroadcast
* @see #unregisterReceiver
*/
@Nullable
public abstract Intent registerReceiver(BroadcastReceiver receiver,
IntentFilter filter, @Nullable String broadcastPermission,
@Nullable Handler scheduler, @RegisterReceiverFlags int flags);
/**
* @hide
* Same as {@link #registerReceiver(BroadcastReceiver, IntentFilter, String, Handler)
* but for a specific user. This receiver will receiver broadcasts that
* are sent to the requested user.
*
* @param receiver The BroadcastReceiver to handle the broadcast.
* @param user UserHandle to send the intent to.
* @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, String, Handler)
* @see #sendBroadcast
* @see #unregisterReceiver
*/
@Nullable
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
@UnsupportedAppUsage
public abstract Intent registerReceiverAsUser(BroadcastReceiver receiver,
UserHandle user, IntentFilter filter, @Nullable String broadcastPermission,
@Nullable 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
* should either contain the complete class name of a specific service
* implementation to start, or a specific package name to target. If the
* Intent is less specified, it logs a warning about this. In this case any of the
* multiple matching services may be used. 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#onStartCommand} 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()
* do not nest: 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.
*
* <p class="note"><strong>Note:</strong> Each call to startService()
* results in significant work done by the system to manage service
* lifecycle surrounding the processing of the intent, which can take
* multiple milliseconds of CPU time. Due to this cost, startService()
* should not be used for frequent intent delivery to a service, and only
* for scheduling significant work. Use {@link #bindService bound services}
* for high frequency calls.
* </p>
*
* @param service Identifies the service to be started. The Intent must be
* fully explicit (supplying a component name). 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 If the caller does not have permission to access the service
* or the service can not be found.
* @throws IllegalStateException If the application is in a state where the service
* can not be started (such as not in the foreground in a state when services are allowed).
*
* @see #stopService
* @see #bindService
*/
@Nullable
public abstract ComponentName startService(Intent service);
/**
* Similar to {@link #startService(Intent)}, but with an implicit promise that the
* Service will call {@link android.app.Service#startForeground(int, android.app.Notification)
* startForeground(int, android.app.Notification)} once it begins running. The service is given
* an amount of time comparable to the ANR interval to do this, otherwise the system
* will automatically stop the service and declare the app ANR.
*
* <p>Unlike the ordinary {@link #startService(Intent)}, this method can be used
* at any time, regardless of whether the app hosting the service is in a foreground
* state.
*
* @param service Identifies the service to be started. The Intent must be
* fully explicit (supplying a component name). 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 If the caller does not have permission to access the service
* or the service can not be found.
*
* @see #stopService
* @see android.app.Service#startForeground(int, android.app.Notification)
*/
@Nullable
public abstract ComponentName startForegroundService(Intent service);
/**
* @hide like {@link #startForegroundService(Intent)} but for a specific user.
*/
@Nullable
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
public abstract ComponentName startForegroundServiceAsUser(Intent service, UserHandle user);
/**
* 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 must be either
* fully explicit (supplying a component name) or specify a specific package
* name it is targetted to.
*
* @return If there is a service matching the given Intent that is already
* running, then it is stopped and {@code true} is returned; else {@code false} is returned.
*
* @throws SecurityException If the caller does not have permission to access the service
* or the service can not be found.
* @throws IllegalStateException If the application is in a state where the service
* can not be started (such as not in the foreground in a state when services are allowed).
*
* @see #startService
*/
public abstract boolean stopService(Intent service);
/**
* @hide like {@link #startService(Intent)} but for a specific user.
*/
@Nullable
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
@UnsupportedAppUsage
public abstract ComponentName startServiceAsUser(Intent service, UserHandle user);
/**
* @hide like {@link #stopService(Intent)} but for a specific user.
*/
@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS)
public abstract boolean stopServiceAsUser(Intent service, UserHandl