使用方法

xml：

code：

@Override  protected void onCreate(@Nullable Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.keep_act);    ButterKnife.bind(this);    //倒计时监听    keep1.setCountdownListener(new KeepCountdownView.CountdownListener() {      @Override      public void onStart() {      }      @Override      public void onEnd() {              }    });  }  @OnClick(R.id.b1)  public void b1(View v) {    keep1.plus(5);//增加5s  }  @OnClick(R.id.b2)  public void b2() {    keep1.post(new Runnable() {      @Override      public void run() {        keep1.startCountDown();//开始倒计时      }    });  }  @OnClick(R.id.b4)  public void b4() {    keep1.reset();//重置  }