@Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Log.e("yw","kaishi"+System.currentTimeMillis());          CountDownTimer timer = new CountDownTimer(0, 0) {
   //输入0,0则直接进入onFinish()            @Override              public void onTick(long millisUntilFinished) {                  Log.e("yw","zhongjian"+System.currentTimeMillis());              }              @Override              public void onFinish() {                  Log.e("yw","over"+System.currentTimeMillis());              }          };         timer.start();    }