获得当前正在显示的activity的类名

需要加一个权限: 

<uses-permission android:name="android.permission.GET_TASKS"/> 

 

ActivityManager manager = (ActivityManager)   getSystemService(Context.ACTIVITY_SERVICE);    

List<RunningTaskInfo> runningTasks = manager .getRunningTasks(1);    

RunningTaskInfo cinfo = runningTasks.get(0);    

ComponentName component = cinfo.topActivity;    

Log.e("current activity is ", component.getClassName());