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Frequently called with: [Clear]
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| java.lang.Object | |
| ↳ | android.app.ActivityManager |
Interact with the overall activities running in the system.
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ActivityManager.MemoryInfo | Information you can retrieve about the available memory through getMemoryInfo(ActivityManager.MemoryInfo). |
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ActivityManager.ProcessErrorStateInfo | Information you can retrieve about any processes that are in an error condition. | |||||||||
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ActivityManager.RecentTaskInfo | Information you can retrieve about tasks that the user has most recently started or visited. | |||||||||
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ActivityManager.RunningAppProcessInfo | Information you can retrieve about a running process. | |||||||||
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ActivityManager.RunningServiceInfo | Information you can retrieve about a particular Service that is currently running in the system. | |||||||||
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ActivityManager.RunningTaskInfo | Information you can retrieve about a particular task that is currently "running" in the system. | |||||||||
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| int | MOVE_TASK_NO_USER_ACTION | Flag for moveTaskToFront(int, int): don't count this as a user-instigated action, so the current activity will not receive a hint that the user is leaving. |
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| int | MOVE_TASK_WITH_HOME | Flag for moveTaskToFront(int, int): also move the "home" activity along with the task, so it is positioned immediately behind the task. |
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| int | RECENT_IGNORE_UNAVAILABLE | Provides a list that does not contain any recent tasks that currently are not available to the user. | |||||||||
| int | RECENT_WITH_EXCLUDED | Flag for use with getRecentTasks(int, int): return all tasks, even those that have set their FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS flag. |
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Get the device configuration attributes.
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Return the approximate per-application memory class of the current device when an application is running with a large heap.
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Get the preferred density of icons for the launcher.
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Get the preferred launcher icon size.
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Return the approximate per-application memory class of the current device.
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Return general information about the memory state of the system.
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Return global memory state information for the calling process.
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Return information about the memory usage of one or more processes.
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Returns a list of any processes that are currently in an error condition.
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Return a list of the tasks that the user has recently launched, with the most recent being first and older ones after in order.
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Returns a list of application processes that are running on the device.
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Returns a PendingIntent you can start to show a control panel for the given running service.
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Return a list of the services that are currently running.
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Return a list of the tasks that are currently running, with the most recent being first and older ones after in order.
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Returns "true" if device is running in a test harness.
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Returns "true" if the user interface is currently being messed with by a monkey.
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Have the system immediately kill all background processes associated with the given package.
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Ask that the task associated with a given task ID be moved to the front of the stack, so it is now visible to the user.
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Equivalent to calling
moveTaskToFront(int, int, Bundle) with a null options argument.
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This method was deprecated in API level 8. This is now just a wrapper for killBackgroundProcesses(String); the previous behavior here is no longer available to applications because it allows them to break other applications by removing their alarms, stopping their services, etc.
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Inherited Methods
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 From class java.lang.Object
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Flag for moveTaskToFront(int, int): don't count this as a user-instigated action, so the current activity will not receive a hint that the user is leaving.
Flag for moveTaskToFront(int, int): also move the "home" activity along with the task, so it is positioned immediately behind the task.
Provides a list that does not contain any recent tasks that currently are not available to the user.
Flag for use with getRecentTasks(int, int): return all tasks, even those that have set their FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS flag.
Get the device configuration attributes.
Return the approximate per-application memory class of the current device when an application is running with a large heap. This is the space available for memory-intensive applications; most applications should not need this amount of memory, and should instead stay with the getMemoryClass() limit. The returned value is in megabytes. This may be the same size as getMemoryClass() on memory constrained devices, or it may be significantly larger on devices with a large amount of available RAM.
The is the size of the application's Dalvik heap if it has specified android:largeHeap="true" in its manifest.
Get the preferred density of icons for the launcher. This is used when custom drawables are created (e.g., for shortcuts).
Get the preferred launcher icon size. This is used when custom drawables are created (e.g., for shortcuts).
Return the approximate per-application memory class of the current device. This gives you an idea of how hard a memory limit you should impose on your application to let the overall system work best. The returned value is in megabytes; the baseline Android memory class is 16 (which happens to be the Java heap limit of those devices); some device with more memory may return 24 or even higher numbers.
Return general information about the memory state of the system. This can be used to help decide how to manage your own memory, though note that polling is not recommended and ComponentCallbacks2.onTrimMemory(int) is the preferred way to do this. Also see getMyMemoryState(ActivityManager.RunningAppProcessInfo) for how to retrieve the current trim level of your process as needed, which gives a better hint for how to manage its memory.
Return global memory state information for the calling process. This does not fill in all fields of the ActivityManager.RunningAppProcessInfo. The only fields that will be filled in are pid, uid, lastTrimLevel, importance, lru, and importanceReasonCode.
Return information about the memory usage of one or more processes.
Note: this method is only intended for debugging or building a user-facing process management UI.
| pids | The pids of the processes whose memory usage is to be retrieved. |
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Returns a list of any processes that are currently in an error condition. The result will be null if all processes are running properly at this time.
Return a list of the tasks that the user has recently launched, with the most recent being first and older ones after in order.
Note: this method is only intended for debugging and presenting task management user interfaces. This should never be used for core logic in an application, such as deciding between different behaviors based on the information found here. Such uses are not supported, and will likely break in the future. For example, if multiple applications can be actively running at the same time, assumptions made about the meaning of the data here for purposes of control flow will be incorrect.
| maxNum | The maximum number of entries to return in the list. The actual number returned may be smaller, depending on how many tasks the user has started and the maximum number the system can remember. |
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| flags | Information about what to return. May be any combination of RECENT_WITH_EXCLUDED and RECENT_IGNORE_UNAVAILABLE. |
| SecurityException | Throws SecurityException if the caller does not hold the GET_TASKS permission. |
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Returns a list of application processes that are running on the device.
Note: this method is only intended for debugging or building a user-facing process management UI.
Returns a PendingIntent you can start to show a control panel for the given running service. If the service does not have a control panel, null is returned.
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Return a list of the services that are currently running.
Note: this method is only intended for debugging or implementing service management type user interfaces.
| maxNum | The maximum number of entries to return in the list. The actual number returned may be smaller, depending on how many services are running. |
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Return a list of the tasks that are currently running, with the most recent being first and older ones after in order. Note that "running" does not mean any of the task's code is currently loaded or activity -- the task may have been frozen by the system, so that it can be restarted in its previous state when next brought to the foreground.
Note: this method is only intended for debugging and presenting task management user interfaces. This should never be used for core logic in an application, such as deciding between different behaviors based on the information found here. Such uses are not supported, and will likely break in the future. For example, if multiple applications can be actively running at the same time, assumptions made about the meaning of the data here for purposes of control flow will be incorrect.
| maxNum | The maximum number of entries to return in the list. The actual number returned may be smaller, depending on how many tasks the user has started. |
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| SecurityException | Throws SecurityException if the caller does not hold the GET_TASKS permission. |
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Returns "true" if device is running in a test harness.
Returns "true" if the user interface is currently being messed with by a monkey.
Have the system immediately kill all background processes associated with the given package. This is the same as the kernel killing those processes to reclaim memory; the system will take care of restarting these processes in the future as needed.
You must hold the permission KILL_BACKGROUND_PROCESSES to be able to call this method.
| packageName | The name of the package whose processes are to be killed. |
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Ask that the task associated with a given task ID be moved to the front of the stack, so it is now visible to the user. Requires that the caller hold permission REORDER_TASKS or a SecurityException will be thrown.
| taskId | The identifier of the task to be moved, as found in ActivityManager.RunningTaskInfo or ActivityManager.RecentTaskInfo. |
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| flags | Additional operational flags, 0 or more of MOVE_TASK_WITH_HOME. |
| options | Additional options for the operation, either null or as per Context.startActivity(Intent, Bundle). |
Equivalent to calling moveTaskToFront(int, int, Bundle) with a null options argument.
| taskId | The identifier of the task to be moved, as found in ActivityManager.RunningTaskInfo or ActivityManager.RecentTaskInfo. |
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| flags | Additional operational flags, 0 or more of MOVE_TASK_WITH_HOME. |
This method was deprecated in API level 8.
This is now just a wrapper for killBackgroundProcesses(String); the previous behavior here is no longer available to applications because it allows them to break other applications by removing their alarms, stopping their services, etc.