获取正在运行的activity的信息

ActivityManager manager = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);
		RunningTaskInfo info = manager.getRunningTasks(1).get(0);
		String shortClassName = info.topActivity.getShortClassName();
		String className = info.topActivity.getClassName();
		String packageName = info.topActivity.getPackageName();
		

光是这样会运行错误,提示需要权限android.permission.GET_TASKS,只要在manifest.xml中添加：