ActivityManager获得正在运行的activity与service

            ActivityManager mActivityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE) ;  

            //获得系统运行的进程
            List<ActivityManager.RunningAppProcessInfo> appList1 = mActivityManager
                    .getRunningAppProcesses();
            for (RunningAppProcessInfo running : appList1) {
                System.out.println(running.processName);
            }
            System.out.println("================");

            //获得当前正在运行的service
            List<ActivityManager.RunningServiceInfo> appList2 = mActivityManager
                    .getRunningServices(100);
            for (ActivityManager.RunningServiceInfo running : appList2) {
                System.out.println(running.service.getClassName());
            }

            System.out.println("================");

            //获得当前正在运行的activity
            List<ActivityManager.RunningTaskInfo> appList3 = mActivityManager
                    .getRunningTasks(1000);
            for (ActivityManager.RunningTaskInfo running : appList3) {
                System.out.println(running.baseActivity.getClassName());
            }
            System.out.println("================");

            //获得最近运行的应用
            List<ActivityManager.RecentTaskInfo> appList4 = mActivityManager
                    .getRecentTasks(100, 1);
            for (ActivityManager.RecentTaskInfo running : appList4) {
                System.out.println(running.origActivity.getClassName());
                }