Android获取正在运行的系统进程

ActivityManager activitymanager = (ActivityManager)this.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningAppProcessInfo> list = activitymanager.getRunningAppProcesses();
int i = list.size();
Log.i("tag", String.valueOf(i));
for(int j=0;j<list.size();j++){
Log.i("tag",list.get(j).processName);
}