android-如何获得当前正在运行的activity的相关信息

http://blog.****.net/centralperk/article/details/7269326

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