android 强制关闭后台程序方法

1.

            ActivityManager am1 = (ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);

            List<RunningServiceInfo> recentTasks1 = am1.getRunningServices(50); //获得所有正在进行的程序
   int numTasks = recentTasks1.size();

                for(int i=0;i<numTasks;i++) 
{ 

final ActivityManager.RunningServiceInfo recentInfo = recentTasks1.get(i);
if(recentInfo.pid==-1)
continue;

String procName=recentInfo.service.getPackageName();

Log.i(TAG,"procName="+procName+"\n");
Log.i(TAG,"clientLabel="+recentInfo.clientLabel+"\n");
Log.i(TAG,"process="+recentInfo.pid+"\n");

android.os.Process.killProcess(recentInfo.pid);

am1.removeTask(recentInfo.pid, ActivityManager.REMOVE_TASK_KILL_PROCESS);
am1.forceStopPackage(procName);
}

2.

                 List<RunningTaskInfo> list1 = am1.getRunningTasks(10);

                 Method forceStopPackage;

                 for (RunningTaskInfo info : list1) 
{
                        procName=info.baseActivity.getPackageName();

try {
forceStopPackage = am.getClass().getDeclaredMethod("forceStopPackage", String.class);
forceStopPackage.setAccessible(true);
forceStopPackage.invoke(am, procName);
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

           }