android-如何获得当前正在运行的activity的相关信息

  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