ActivityManager.java
/*
* Copyright (C) 2007 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.app;
import com.android.internal.app.IUsageStats;
import com.android.internal.os.PkgUsageStats;
import com.android.internal.util.MemInfoReader;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.ConfigurationInfo;
import android.content.pm.IPackageDataObserver;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.os.Debug;
import android.os.Handler;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemProperties;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.Slog;
import android.view.Display;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Interact with the overall activities running in the system.
*/
public class ActivityManager {
private static String TAG = "ActivityManager";
private static boolean localLOGV = false;
private final Context mContext;
private final Handler mHandler;
/*package*/ ActivityManager(Context context, Handler handler) {
mContext = context;
mHandler = handler;
}
/**
* Screen compatibility mode: the application most always run in
* compatibility mode.
* @hide
*/
public static final int COMPAT_MODE_ALWAYS = -1;
/**
* Screen compatibility mode: the application can never run in
* compatibility mode.
* @hide
*/
public static final int COMPAT_MODE_NEVER = -2;
/**
* Screen compatibility mode: unknown.
* @hide
*/
public static final int COMPAT_MODE_UNKNOWN = -3;
/**
* Screen compatibility mode: the application currently has compatibility
* mode disabled.
* @hide
*/
public static final int COMPAT_MODE_DISABLED = 0;
/**
* Screen compatibility mode: the application currently has compatibility
* mode enabled.
* @hide
*/
public static final int COMPAT_MODE_ENABLED = 1;
/**
* Screen compatibility mode: request to toggle the application's
* compatibility mode.
* @hide
*/
public static final int COMPAT_MODE_TOGGLE = 2;
/** @hide */
public int getFrontActivityScreenCompatMode() {
try {
return ActivityManagerNative.getDefault().getFrontActivityScreenCompatMode();
} catch (RemoteException e) {
// System dead, we will be dead too soon!
return 0;
}
}
/** @hide */
public void setFrontActivityScreenCompatMode(int mode) {
try {
ActivityManagerNative.getDefault().setFrontActivityScreenCompatMode(mode);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
}
}
/** @hide */
public int getPackageScreenCompatMode(String packageName) {
try {
return ActivityManagerNative.getDefault().getPackageScreenCompatMode(packageName);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
return 0;
}
}
/** @hide */
public void setPackageScreenCompatMode(String packageName, int mode) {
try {
ActivityManagerNative.getDefault().setPackageScreenCompatMode(packageName, mode);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
}
}
/** @hide */
public boolean getPackageAskScreenCompat(String packageName) {
try {
return ActivityManagerNative.getDefault().getPackageAskScreenCompat(packageName);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
return false;
}
}
/** @hide */
public void setPackageAskScreenCompat(String packageName, boolean ask) {
try {
ActivityManagerNative.getDefault().setPackageAskScreenCompat(packageName, ask);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
}
}
/**
* 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.
*/
public int getMemoryClass() {
return staticGetMemoryClass();
}
/** @hide */
static public int staticGetMemoryClass() {
// Really brain dead right now -- just take this from the configured
// vm heap size, and assume it is in megabytes and thus ends with "m".
String vmHeapSize = SystemProperties.get("dalvik.vm.heapgrowthlimit", "");
if (vmHeapSize != null && !"".equals(vmHeapSize)) {
return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1));
}
return staticGetLargeMemoryClass();
}
/**
* 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
* {@link #getMemoryClass()} limit. The returned value is in megabytes.
* This may be the same size as {@link #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.
*/
public int getLargeMemoryClass() {
return staticGetLargeMemoryClass();
}
/** @hide */
static public int staticGetLargeMemoryClass() {
// Really brain dead right now -- just take this from the configured
// vm heap size, and assume it is in megabytes and thus ends with "m".
String vmHeapSize = SystemProperties.get("dalvik.vm.heapsize", "16m");
return Integer.parseInt(vmHeapSize.substring(0, vmHeapSize.length()-1));
}
/**
* Used by persistent processes to determine if they are running on a
* higher-end device so should be okay using hardware drawing acceleration
* (which tends to consume a lot more RAM).
* @hide
*/
static public boolean isHighEndGfx(Display display) {
MemInfoReader reader = new MemInfoReader();
reader.readMemInfo();
if (reader.getTotalSize() >= (512*1024*1024)) {
// If the device has at least 512MB RAM available to the kernel,
// we can afford the overhead of graphics acceleration.
return true;
}
Point p = new Point();
display.getRealSize(p);
int pixels = p.x * p.y;
if (pixels >= (1024*600)) {
// If this is a sufficiently large screen, then there are enough
// pixels on it that we'd really like to use hw drawing.
return true;
}
return false;
}
/**
* Use to decide whether the running device can be considered a "large
* RAM" device. Exactly what memory limit large RAM is will vary, but
* it essentially means there is plenty of RAM to have lots of background
* processes running under decent loads.
* @hide
*/
static public boolean isLargeRAM() {
MemInfoReader reader = new MemInfoReader();
reader.readMemInfo();
if (reader.getTotalSize() >= (640*1024*1024)) {
// Currently 640MB RAM available to the kernel is the point at
// which we have plenty of RAM to spare.
return true;
}
return false;
}
/**
* Information you can retrieve about tasks that the user has most recently
* started or visited.
*/
public static class RecentTaskInfo implements Parcelable {
/**
* If this task is currently running, this is the identifier for it.
* If it is not running, this will be -1.
*/
public int id;
/**
* The true identifier of this task, valid even if it is not running.
*/
public int persistentId;
/**
* The original Intent used to launch the task. You can use this
* Intent to re-launch the task (if it is no longer running) or bring
* the current task to the front.
*/
public Intent baseIntent;
/**
* If this task was started from an alias, this is the actual
* activity component that was initially started; the component of
* the baseIntent in this case is the name of the actual activity
* implementation that the alias referred to. Otherwise, this is null.
*/
public ComponentName origActivity;
/**
* Description of the task's last state.
*/
public CharSequence description;
public RecentTaskInfo() {
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(id);
dest.writeInt(persistentId);
if (baseIntent != null) {
dest.writeInt(1);
baseIntent.writeToParcel(dest, 0);
} else {
dest.writeInt(0);
}
ComponentName.writeToParcel(origActivity, dest);
TextUtils.writeToParcel(description, dest,
Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
}
public void readFromParcel(Parcel source) {
id = source.readInt();
persistentId = source.readInt();
if (source.readInt() != 0) {
baseIntent = Intent.CREATOR.createFromParcel(source);
} else {
baseIntent = null;
}
origActivity = ComponentName.readFromParcel(source);
description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source);
}
public static final Creator CREATOR
= new Creator() {
public RecentTaskInfo createFromParcel(Parcel source) {
return new RecentTaskInfo(source);
}
public RecentTaskInfo[] newArray(int size) {
return new RecentTaskInfo[size];
}
};
private RecentTaskInfo(Parcel source) {
readFromParcel(source);
}
}
/**
* Flag for use with {@link #getRecentTasks}: return all tasks, even those
* that have set their
* {@link android.content.Intent#FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS} flag.
*/
public static final int RECENT_WITH_EXCLUDED = 0x0001;
/**
* Provides a list that does not contain any
* recent tasks that currently are not available to the user.
*/
public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002;
/**
* Return a list of the tasks that the user has recently launched, with
* the most recent being first and older ones after in order.
*
* @param 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.
* @param flags Information about what to return. May be any combination
* of {@link #RECENT_WITH_EXCLUDED} and {@link #RECENT_IGNORE_UNAVAILABLE}.
*
* @return Returns a list of RecentTaskInfo records describing each of
* the recent tasks.
*
* @throws SecurityException Throws SecurityException if the caller does
* not hold the {@link android.Manifest.permission#GET_TASKS} permission.
*/
public List getRecentTasks(int maxNum, int flags)
throws SecurityException {
try {
return ActivityManagerNative.getDefault().getRecentTasks(maxNum,
flags);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
return null;
}
}
/**
* Information you can retrieve about a particular task that is currently
* "running" in the system. Note that a running task does not mean the
* given task actually has a process it is actively running in; it simply
* means that the user has gone to it and never closed it, but currently
* the system may have killed its process and is only holding on to its
* last state in order to restart it when the user returns.
*/
public static class RunningTaskInfo implements Parcelable {
/**
* A unique identifier for this task.
*/
public int id;
/**
* The component launched as the first activity in the task. This can
* be considered the "application" of this task.
*/
public ComponentName baseActivity;
/**
* The activity component at the top of the history stack of the task.
* This is what the user is currently doing.
*/
public ComponentName topActivity;
/**
* Thumbnail representation of the task's current state. Currently
* always null.
*/
public Bitmap thumbnail;
/**
* Description of the task's current state.
*/
public CharSequence description;
/**
* Number of activities in this task.
*/
public int numActivities;
/**
* Number of activities that are currently running (not stopped
* and persisted) in this task.
*/
public int numRunning;
public RunningTaskInfo() {
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(id);
ComponentName.writeToParcel(baseActivity, dest);
ComponentName.writeToParcel(topActivity, dest);
if (thumbnail != null) {
dest.writeInt(1);
thumbnail.writeToParcel(dest, 0);
} else {
dest.writeInt(0);
}
TextUtils.writeToParcel(description, dest,
Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
dest.writeInt(numActivities);
dest.writeInt(numRunning);
}
public void readFromParcel(Parcel source) {
id = source.readInt();
baseActivity = ComponentName.readFromParcel(source);
topActivity = ComponentName.readFromParcel(source);
if (source.readInt() != 0) {
thumbnail = Bitmap.CREATOR.createFromParcel(source);
} else {
thumbnail = null;
}
description = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(source);
numActivities = source.readInt();
numRunning = source.readInt();
}
public static final Creator CREATOR = new Creator() {
public RunningTaskInfo createFromParcel(Parcel source) {
return new RunningTaskInfo(source);
}
public RunningTaskInfo[] newArray(int size) {
return new RunningTaskInfo[size];
}
};
private RunningTaskInfo(Parcel source) {
readFromParcel(source);
}
}
/**
* 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.
*
* @param 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.
*
* @param flags Optional flags
* @param receiver Optional receiver for delayed thumbnails
*
* @return Returns a list of RunningTaskInfo records describing each of
* the running tasks.
*
* Some thumbnails may not be available at the time of this call. The optional
* receiver may be used to receive those thumbnails.
*
* @throws SecurityException Throws SecurityException if the caller does
* not hold the {@link android.Manifest.permission#GET_TASKS} permission.
*
* @hide
*/
public List getRunningTasks(int maxNum, int flags, IThumbnailReceiver receiver)
throws SecurityException {
try {
return ActivityManagerNative.getDefault().getTasks(maxNum, flags, receiver);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
return null;
}
}
/**
* 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.
*
* @param 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.
*
* @return Returns a list of RunningTaskInfo records describing each of
* the running tasks.
*
* @throws SecurityException Throws SecurityException if the caller does
* not hold the {@link android.Manifest.permission#GET_TASKS} permission.
*/
public List getRunningTasks(int maxNum)
throws SecurityException {
return getRunningTasks(maxNum, 0, null);
}
/**
* Remove some end of a task's activity stack that is not part of
* the main application. The selected activities will be finished, so
* they are no longer part of the main task.
*
* @param taskId The identifier of the task.
* @param subTaskIndex The number of the sub-task; this corresponds
* to the index of the thumbnail returned by {@link #getTaskThumbnails(int)}.
* @return Returns true if the sub-task was found and was removed.
*
* @hide
*/
public boolean removeSubTask(int taskId, int subTaskIndex)
throws SecurityException {
try {
return ActivityManagerNative.getDefault().removeSubTask(taskId, subTaskIndex);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
return false;
}
}
/**
* If set, the process of the root activity of the task will be killed
* as part of removing the task.
* @hide
*/
public static final int REMOVE_TASK_KILL_PROCESS = 0x0001;
/**
* Completely remove the given task.
*
* @param taskId Identifier of the task to be removed.
* @param flags Additional operational flags. May be 0 or
* {@link #REMOVE_TASK_KILL_PROCESS}.
* @return Returns true if the given task was found and removed.
*
* @hide
*/
public boolean removeTask(int taskId, int flags)
throws SecurityException {
try {
return ActivityManagerNative.getDefault().removeTask(taskId, flags);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
return false;
}
}
/** @hide */
public static class TaskThumbnails implements Parcelable {
public Bitmap mainThumbnail;
public int numSubThumbbails;
/** @hide */
public IThumbnailRetriever retriever;
public TaskThumbnails() {
}
public Bitmap getSubThumbnail(int index) {
try {
return retriever.getThumbnail(index);
} catch (RemoteException e) {
return null;
}
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
if (mainThumbnail != null) {
dest.writeInt(1);
mainThumbnail.writeToParcel(dest, 0);
} else {
dest.writeInt(0);
}
dest.writeInt(numSubThumbbails);
dest.writeStrongInterface(retriever);
}
public void readFromParcel(Parcel source) {
if (source.readInt() != 0) {
mainThumbnail = Bitmap.CREATOR.createFromParcel(source);
} else {
mainThumbnail = null;
}
numSubThumbbails = source.readInt();
retriever = IThumbnailRetriever.Stub.asInterface(source.readStrongBinder());
}
public static final Creator CREATOR = new Creator() {
public TaskThumbnails createFromParcel(Parcel source) {
return new TaskThumbnails(source);
}
public TaskThumbnails[] newArray(int size) {
return new TaskThumbnails[size];
}
};
private TaskThumbnails(Parcel source) {
readFromParcel(source);
}
}
/** @hide */
public TaskThumbnails getTaskThumbnails(int id) throws SecurityException {
try {
return ActivityManagerNative.getDefault().getTaskThumbnails(id);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
return null;
}
}
/**
* Flag for {@link #moveTaskToFront(int, int)}: also move the "home"
* activity along with the task, so it is positioned immediately behind
* the task.
*/
public static final int MOVE_TASK_WITH_HOME = 0x00000001;
/**
* Flag for {@link #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.
*/
public static final int MOVE_TASK_NO_USER_ACTION = 0x00000002;
/**
* 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 {@link android.Manifest.permission#REORDER_TASKS}
* or a SecurityException will be thrown.
*
* @param taskId The identifier of the task to be moved, as found in
* {@link RunningTaskInfo} or {@link RecentTaskInfo}.
* @param flags Additional operational flags, 0 or more of
* {@link #MOVE_TASK_WITH_HOME}.
*/
public void moveTaskToFront(int taskId, int flags) {
try {
ActivityManagerNative.getDefault().moveTaskToFront(taskId, flags);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
}
}
/**
* Information you can retrieve about a particular Service that is
* currently running in the system.
*/
public static class RunningServiceInfo implements Parcelable {
/**
* The service component.
*/
public ComponentName service;
/**
* If non-zero, this is the process the service is running in.
*/
public int pid;
/**
* The UID that owns this service.
*/
public int uid;
/**
* The name of the process this service runs in.
*/
public String process;
/**
* Set to true if the service has asked to run as a foreground process.
*/
public boolean foreground;
/**
* The time when the service was first made active, either by someone
* starting or binding to it. This
* is in units of {@link android.os.SystemClock#elapsedRealtime()}.
*/
public long activeSince;
/**
* Set to true if this service has been explicitly started.
*/
public boolean started;
/**
* Number of clients connected to the service.
*/
public int clientCount;
/**
* Number of times the service's process has crashed while the service
* is running.
*/
public int crashCount;
/**
* The time when there was last activity in the service (either
* explicit requests to start it or clients binding to it). This
* is in units of {@link android.os.SystemClock#uptimeMillis()}.
*/
public long lastActivityTime;
/**
* If non-zero, this service is not currently running, but scheduled to
* restart at the given time.
*/
public long restarting;
/**
* Bit for {@link #flags}: set if this service has been
* explicitly started.
*/
public static final int FLAG_STARTED = 1<<0;
/**
* Bit for {@link #flags}: set if the service has asked to
* run as a foreground process.
*/
public static final int FLAG_FOREGROUND = 1<<1;
/**
* Bit for {@link #flags): set if the service is running in a
* core system process.
*/
public static final int FLAG_SYSTEM_PROCESS = 1<<2;
/**
* Bit for {@link #flags): set if the service is running in a
* persistent process.
*/
public static final int FLAG_PERSISTENT_PROCESS = 1<<3;
/**
* Running flags.
*/
public int flags;
/**
* For special services that are bound to by system code, this is
* the package that holds the binding.
*/
public String clientPackage;
/**
* For special services that are bound to by system code, this is
* a string resource providing a user-visible label for who the
* client is.
*/
public int clientLabel;
public RunningServiceInfo() {
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
ComponentName.writeToParcel(service, dest);
dest.writeInt(pid);
dest.writeInt(uid);
dest.writeString(process);
dest.writeInt(foreground ? 1 : 0);
dest.writeLong(activeSince);
dest.writeInt(started ? 1 : 0);
dest.writeInt(clientCount);
dest.writeInt(crashCount);
dest.writeLong(lastActivityTime);
dest.writeLong(restarting);
dest.writeInt(this.flags);
dest.writeString(clientPackage);
dest.writeInt(clientLabel);
}
public void readFromParcel(Parcel source) {
service = ComponentName.readFromParcel(source);
pid = source.readInt();
uid = source.readInt();
process = source.readString();
foreground = source.readInt() != 0;
activeSince = source.readLong();
started = source.readInt() != 0;
clientCount = source.readInt();
crashCount = source.readInt();
lastActivityTime = source.readLong();
restarting = source.readLong();
flags = source.readInt();
clientPackage = source.readString();
clientLabel = source.readInt();
}
public static final Creator CREATOR = new Creator() {
public RunningServiceInfo createFromParcel(Parcel source) {
return new RunningServiceInfo(source);
}
public RunningServiceInfo[] newArray(int size) {
return new RunningServiceInfo[size];
}
};
private RunningServiceInfo(Parcel source) {
readFromParcel(source);
}
}
/**
* Return a list of the services that are currently running.
*
* @param 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.
*
* @return Returns a list of RunningServiceInfo records describing each of
* the running tasks.
*/
public List getRunningServices(int maxNum)
throws SecurityException {
try {
return ActivityManagerNative.getDefault()
.getServices(maxNum, 0);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
return null;
}
}
/**
* 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.
*/
public PendingIntent getRunningServiceControlPanel(ComponentName service)
throws SecurityException {
try {
return ActivityManagerNative.getDefault()
.getRunningServiceControlPanel(service);
} catch (RemoteException e) {
// System dead, we will be dead too soon!
return null;
}
}
/**
* Information you can retrieve about the available memory through
* {@link ActivityManager#getMemoryInfo}.
*/
public static class MemoryInfo implements Parcelable {
/**
* The total available memory on the system. This number should not
* be considered absolute: due to the nature of the kernel, a significant
* portion of this memory is actually in use and needed for the overall
* system to run well.
*/
public long availMem;
/**
* The threshold of {@link #availMem} at which we consider memory to be
* low and start killing background services and other non-extraneous
* processes.
*/
public long threshold;
/**
* Set to true if the system considers itself to currently be in a low
* memory situation.
*/
public boolean lowMemory;
/** @hide */
public long hiddenAppThreshold;
/** @hide */
public long secondaryServerThreshold;
/** @hide */
public long visibleAppThreshold;
/** @hide */
public long foregroundAppThreshold;
public MemoryInfo() {
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeLong(availMem);
dest.writeLong(threshold);
dest.writeInt(lowMemory ? 1 : 0);
dest.writeLong(hiddenAppThreshold);
dest.writeLong(secondaryServerThreshold);
dest.writeLong(visibleAppThreshold);
dest.writeLong(foregroundAppThreshold);
}
public void readFromParcel(Parcel source) {
availMem = source.readLong();
threshold = source.readLong();
lowMemory = source.readInt() != 0;
hiddenAppThreshold = source.readLong();
secondaryServerThreshold = source.readLong();
visibleAppThreshold = source.readLong();
foregroundAppThreshold = source.readLong();
}
public static final Creator CREATOR
= new Creator() {
public MemoryInfo createFromParcel(Parcel source) {
return new MemoryInfo(source);
}
public MemoryInfo[] newArray(int size) {
return new MemoryInfo[size];
}
};
private MemoryInfo(Parcel source) {
readFromParcel(source);
}
}
public void getMemoryInfo(MemoryInfo outInfo) {
try {
ActivityManagerNative.getDefault().getMemoryInfo(outInfo);
} catch (RemoteException e) {
}
}
/**
* @hide
*/
public boolean clearApplicationUserData(String packageName, IPackageDataObserver observer) {
try {
return ActivityManagerNative.getDefault().clearApplicationUserData(packageName,
observer);
} catch (RemoteException e) {
return false;
}
}
/**
* Information you can retrieve about any processes that are in an error condition.
*/
public static class ProcessErrorStateInfo implements Parcelable {
/**
* Condition codes
*/
public static final int NO_ERROR = 0;
public static final int CRASHED = 1;
public static final int NOT_RESPONDING = 2;
/**
* The condition that the process is in.
*/
public int condition;
/**
* The process name in which the crash or error occurred.
*/
public String processName;
/**
* The pid of this process; 0 if none
*/
public int pid;
/**
* The kernel user-ID that has been assigned to this process;
* currently this is not a unique ID (multiple applications can have
* the same uid).
*/
public int uid;
/**
* The activity name associated with the error, if known. May be null.
*/
public String tag;
/**
* A short message describing the error condition.
*/
public String shortMsg;
/**
* A long message describing the error condition.
*/
public String longMsg;
/**
* The stack trace where the error originated. May be null.
*/
public String stackTrace;
/**
* to be deprecated: This value will always be null.
*/
public byte[] crashData = null;
public ProcessErrorStateInfo() {
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(condition);
dest.writeString(processName);
dest.writeInt(pid);
dest.writeInt(uid);
dest.writeString(tag);
dest.writeString(shortMsg);
dest.writeString(longMsg);
dest.writeString(stackTrace);
}
public void readFromParcel(Parcel source) {
condition = source.readInt();
processName = source.readString();
pid = source.readInt();
uid = source.readInt();
tag = source.readString();
shortMsg = source.readString();
longMsg = source.readString();
stackTrace = source.readString();
}
public static final Creator CREATOR =
new Creator() {
public ProcessErrorStateInfo createFromParcel(Parcel source) {
return new ProcessErrorStateInfo(source);
}
public ProcessErrorStateInfo[] newArray(int size) {
return new ProcessErrorStateInfo[size];
}
};
private ProcessErrorStateInfo(Parcel source) {
readFromParcel(source);
}
}
/**
* 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 Returns a list of ProcessErrorStateInfo records, or null if there are no
* current error conditions (it will not return an empty list). This list ordering is not
* specified.
*/
public List getProcessesInErrorState() {
try {
return ActivityManagerNative.getDefault().getProcessesInErrorState();
} catch (RemoteException e) {
return null;
}
}
/**
* Information you can retrieve about a running process.
*/
public static class RunningAppProcessInfo implements Parcelable {
/**
* The name of the process that this object is associated with
*/
public String processName;
/**
* The pid of this process; 0 if none
*/
public int pid;
/**
* The user id of this process.
*/
public int uid;
/**
* All packages that have been loaded into the process.
*/
public String pkgList[];
/**
* Constant for {@link #flags}: this is an app that is unable to
* correctly save its state when going to the background,
* so it can not be killed while in the background.
* @hide
*/
public static final int FLAG_CANT_SAVE_STATE = 1<<0;
/**
* Constant for {@link #flags}: this process is associated with a
* persistent system app.
* @hide
*/
public static final int FLAG_PERSISTENT = 1<<1;
/**
* Flags of information. May be any of
* {@link #FLAG_CANT_SAVE_STATE}.
* @hide
*/
public int flags;
/**
* Constant for {@link #importance}: this process is running the
* foreground UI.
*/
public static final int IMPORTANCE_FOREGROUND = 100;
/**
* Constant for {@link #importance}: this process is running something
* that is actively visible to the user, though not in the immediate
* foreground.
*/
public static final int IMPORTANCE_VISIBLE = 200;
/**
* Constant for {@link #importance}: this process is running something
* that is considered to be actively perceptible to the user. An
* example would be an application performing background music playback.
*/
public static final int IMPORTANCE_PERCEPTIBLE = 130;
/**
* Constant for {@link #importance}: this process is running an
* application that can not save its state, and thus can't be killed
* while in the background.
* @hide
*/
public static final int IMPORTANCE_CANT_SAVE_STATE = 170;
/**
* Constant for {@link #importance}: this process is contains services
* that should remain running.
*/
public static final int IMPORTANCE_SERVICE = 300;
/**
* Constant for {@link #importance}: this process process contains
* background code that is expendable.
*/
public static final int IMPORTANCE_BACKGROUND = 400;
/**
* Constant for {@link #importance}: this process is empty of any
* actively running code.
*/
public static final int IMPORTANCE_EMPTY = 500;
/**
* The relative importance level that the system places on this
* process. May be one of {@link #IMPORTANCE_FOREGROUND},
* {@link #IMPORTANCE_VISIBLE}, {@link #IMPORTANCE_SERVICE},
* {@link #IMPORTANCE_BACKGROUND}, or {@link #IMPORTANCE_EMPTY}. These
* constants are numbered so that "more important" values are always
* smaller than "less important" values.
*/
public int importance;
/**
* An additional ordering within a particular {@link #importance}
* category, providing finer-grained information about the relative
* utility of processes within a category. This number means nothing
* except that a smaller values are more recently used (and thus
* more important). Currently an LRU value is only maintained for
* the {@link #IMPORTANCE_BACKGROUND} category, though others may
* be maintained in the future.
*/
public int lru;
/**
* Constant for {@link #importanceReasonCode}: nothing special has
* been specified for the reason for this level.
*/
public static final int REASON_UNKNOWN = 0;
/**
* Constant for {@link #importanceReasonCode}: one of the application's
* content providers is being used by another process. The pid of
* the client process is in {@link #importanceReasonPid} and the
* target provider in this process is in
* {@link #importanceReasonComponent}.
*/
public static final int REASON_PROVIDER_IN_USE = 1;
/**
* Constant for {@link #importanceReasonCode}: one of the application's
* content providers is being used by another process. The pid of
* the client process is in {@link #importanceReasonPid} and the
* target provider in this process is in
* {@link #importanceReasonComponent}.
*/
public static final int REASON_SERVICE_IN_USE = 2;
/**
* The reason for {@link #importance}, if any.
*/
public int importanceReasonCode;
/**
* For the specified values of {@link #importanceReasonCode}, this
* is the process ID of the other process that is a client of this
* process. This will be 0 if no other process is using this one.
*/
public int importanceReasonPid;
/**
* For the specified values of {@link #importanceReasonCode}, this
* is the name of the component that is being used in this process.
*/
public ComponentName importanceReasonComponent;
/**
* When {@link importanceReasonPid} is non-0, this is the importance
* of the other pid. @hide
*/
public int importanceReasonImportance;
public RunningAppProcessInfo() {
importance = IMPORTANCE_FOREGROUND;
importanceReasonCode = REASON_UNKNOWN;
}
public RunningAppProcessInfo(String pProcessName, int pPid, String pArr[]) {
processName = pProcessName;
pid = pPid;
pkgList = pArr;
}
public int describeContents() {
return 0;
}
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(processName);
dest.writeInt(pid);
dest.writeInt(uid);
dest.writeStringArray(pkgList);
dest.writeInt(this.flags);
dest.writeInt(importance);
dest.writeInt(lru);
dest.writeInt(importanceReasonCode);
dest.writeInt(importanceReasonPid);
ComponentName.writeToParcel(importanceReasonComponent, dest);
dest.writeInt(importanceReasonImportance);
}
public void readFromParcel(Parcel source) {
processName = source.readString();
pid = source.readInt();
uid = source.readInt();
pkgList = source.readStringArray();
flags = source.readInt();
importance = source.readInt();
lru = source.readInt();
importanceReasonCode = source.readInt();
importanceReasonPid = source.readInt();
importanceReasonComponent = ComponentName.readFromParcel(source);
importanceReasonImportance = source.readInt();
}
public static final Creator CREATOR =
new Creator() {
public RunningAppProcessInfo createFromParcel(Parcel source) {
return new RunningAppProcessInfo(source);
}
public RunningAppProcessInfo[] newArray(int size) {
return new RunningAppProcessInfo[size];
}
};
private RunningAppProcessInfo(Parcel source) {
readFromParcel(source);
}
}
/**
* Returns a list of application processes installed on external media
* that are running on the device.
*
* @return Returns a list of ApplicationInfo records, or null if none
* This list ordering is not specified.
* @hide
*/
public List getRunningExternalApplications() {
try {
return ActivityManagerNative.getDefault().getRunningExternalApplications();
} catch (RemoteException e) {
return null;
}
}
/**
* Returns a list of application processes that are running on the device.
*
* @return Returns a list of RunningAppProcessInfo records, or null if there are no
* running processes (it will not return an empty list). This list ordering is not
* specified.
*/
public List getRunningAppProcesses() {
try {
return ActivityManagerNative.getDefault().getRunningAppProcesses();
} catch (RemoteException e) {
return null;
}
}
/**
* Return information about the memory usage of one or more processes.
*
* @param pids The pids of the processes whose memory usage is to be
* retrieved.
* @return Returns an array of memory information, one for each
* requested pid.
*/
public Debug.MemoryInfo[] getProcessMemoryInfo(int[] pids) {
try {
return ActivityManagerNative.getDefault().getProcessMemoryInfo(pids);
} catch (RemoteException e) {
return null;
}
}
/**
* @deprecated This is now just a wrapper for
* {@link #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.
*/
@Deprecated
public void restartPackage(String packageName) {
killBackgroundProcesses(packageName);
}
/**
* 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
* {@link android.Manifest.permission#KILL_BACKGROUND_PROCESSES} to be able to
* call this method.
*
* @param packageName The name of the package whose processes are to
* be killed.
*/
public void killBackgroundProcesses(String packageName) {
try {
ActivityManagerNative.getDefault().killBackgroundProcesses(packageName);
} catch (RemoteException e) {
}
}
/**
* Have the system perform a force stop of everything associated with
* the given application package. All processes that share its uid
* will be killed, all services it has running stopped, all activities
* removed, etc. In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED}
* broadcast will be sent, so that any of its registered alarms can
* be stopped, notifications removed, etc.
*
*
You must hold the permission
* {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to
* call this method.
*
* @param packageName The name of the package to be stopped.
*
* @hide This is not available to third party applications due to
* it allowing them to break other applications by stopping their
* services, removing their alarms, etc.
*/
public void forceStopPackage(String packageName) {
try {
ActivityManagerNative.getDefault().forceStopPackage(packageName);
} catch (RemoteException e) {
}
}
/**
* Get the device configuration attributes.
*/
public ConfigurationInfo getDeviceConfigurationInfo() {
try {
return ActivityManagerNative.getDefault().getDeviceConfigurationInfo();
} catch (RemoteException e) {
}
return null;
}
/**
* Get the preferred density of icons for the launcher. This is used when
* custom drawables are created (e.g., for shortcuts).
*
* @return density in terms of DPI
*/
public int getLauncherLargeIconDensity() {
final Resources res = mContext.getResources();
final int density = res.getDisplayMetrics().densityDpi;
if ((res.getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK)
!= Configuration.SCREENLAYOUT_SIZE_XLARGE) {
return density;
}
switch (density) {
case DisplayMetrics.DENSITY_LOW:
return DisplayMetrics.DENSITY_MEDIUM;
case DisplayMetrics.DENSITY_MEDIUM:
return DisplayMetrics.DENSITY_HIGH;
case DisplayMetrics.DENSITY_HIGH:
return DisplayMetrics.DENSITY_XHIGH;
case DisplayMetrics.DENSITY_XHIGH:
return DisplayMetrics.DENSITY_MEDIUM * 2;
default:
return density;
}
}
/**
* Get the preferred launcher icon size. This is used when custom drawables
* are created (e.g., for shortcuts).
*
* @return dimensions of square icons in terms of pixels
*/
public int getLauncherLargeIconSize() {
final Resources res = mContext.getResources();
final int size = res.getDimensionPixelSize(android.R.dimen.app_icon_size);
if ((res.getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK)
!= Configuration.SCREENLAYOUT_SIZE_XLARGE) {
return size;
}
final int density = res.getDisplayMetrics().densityDpi;
switch (density) {
case DisplayMetrics.DENSITY_LOW:
return (size * DisplayMetrics.DENSITY_MEDIUM) / DisplayMetrics.DENSITY_LOW;
case DisplayMetrics.DENSITY_MEDIUM:
return (size * DisplayMetrics.DENSITY_HIGH) / DisplayMetrics.DENSITY_MEDIUM;
case DisplayMetrics.DENSITY_HIGH:
return (size * DisplayMetrics.DENSITY_XHIGH) / DisplayMetrics.DENSITY_HIGH;
case DisplayMetrics.DENSITY_XHIGH:
return (size * DisplayMetrics.DENSITY_MEDIUM * 2) / DisplayMetrics.DENSITY_XHIGH;
default:
return size;
}
}
/**
* Returns "true" if the user interface is currently being messed with
* by a monkey.
*/
public static boolean isUserAMonkey() {
try {
return ActivityManagerNative.getDefault().isUserAMonkey();
} catch (RemoteException e) {
}
return false;
}
/**
* Returns "true" if device is running in a test harness.
*/
public static boolean isRunningInTestHarness() {
return SystemProperties.getBoolean("ro.test_harness", false);
}
/**
* Returns the launch count of each installed package.
*
* @hide
*/
public Map getAllPackageLaunchCounts() {
try {
IUsageStats usageStatsService = IUsageStats.Stub.asInterface(
ServiceManager.getService("usagestats"));
if (usageStatsService == null) {
return new HashMap();
}
PkgUsageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats();
if (allPkgUsageStats == null) {
return new HashMap();
}
Map launchCounts = new HashMap();
for (PkgUsageStats pkgUsageStats : allPkgUsageStats) {
launchCounts.put(pkgUsageStats.packageName, pkgUsageStats.launchCount);
}
return launchCounts;
} catch (RemoteException e) {
Log.w(TAG, "Could not query launch counts", e);
return new HashMap();
}
}
/**
* Returns the usage statistics of each installed package.
*
* @hide
*/
public PkgUsageStats[] getAllPackageUsageStats() {
try {
IUsageStats usageStatsService = IUsageStats.Stub.asInterface(
ServiceManager.getService("usagestats"));
if (usageStatsService != null) {
return usageStatsService.getAllPkgUsageStats();
}
} catch (RemoteException e) {
Log.w(TAG, "Could not query usage stats", e);
}
return new PkgUsageStats[0];
}
/**
* @param userid the user's id. Zero indicates the default user
* @hide
*/
public boolean switchUser(int userid) {
try {
return ActivityManagerNative.getDefault().switchUser(userid);
} catch (RemoteException e) {
return false;
}
}
}