Android 用RxBinding与RxJava2实现短信验证码倒计时功能

compile 'io.reactivex.rxjava2:rxandroid:2.0.1'compile 'io.reactivex.rxjava2:rxjava:2.0.1'compile 'com.jakewharton.rxbinding2:rxbinding:2.0.0'compile 'com.jakewharton.rxbinding2:rxbinding-support-v4:2.0.0'compile 'com.jakewharton.rxbinding2:rxbinding-appcompat-v7:2.0.0'

Observable<Long> mObservableCountTime = RxView.clicks(mBtnSendMsm)  //防止重复点击  .throttleFirst(MAX_COUNT_TIME, TimeUnit.SECONDS)  //将点击事件转换成倒计时事件  .flatMap(new Function<Object, ObservableSource<Long>>() {    @Override    public ObservableSource<Long> apply(Object o) throws Exception {      //更新发送按钮的状态并初始化显现倒计时文字      RxView.enabled(mBtnSendMsm).accept(false);      RxTextView.text(mBtnSendMsm).accept("剩余 " + MAX_COUNT_TIME + " 秒");      //在实际操作中可以在此发送获取网络的请求      //返回 N 秒内的倒计时观察者对象。      return Observable.interval(1, TimeUnit.SECONDS, Schedulers.io()).take(MAX_COUNT_TIME);    }  })  //将递增数字替换成递减的倒计时数字  .map(new Function<Long, Long>() {    @Override    public Long apply(Long aLong) throws Exception {      return MAX_COUNT_TIME - (aLong + 1);    }  })  .observeOn(AndroidSchedulers.mainThread());//切换到 Android 的主线程。

Consumer<Long> mConsumerCountTime = new Consumer<Long>() {  @Override  public void accept(Long aLong) throws Exception {    //显示剩余时长。当倒计时为 0 时，还原 btn 按钮.    if (aLong == 0) {      RxView.enabled(mBtnSendMsm).accept(true);      RxTextView.text(mBtnSendMsm).accept("发送验证码");    } else {      RxTextView.text(mBtnSendMsm).accept("剩余 " + aLong + " 秒");    }  }};

 //订阅点击事件 Disposable mDisposable = mObservableCountTime.subscribe(mConsumerCountTime);

//重置验证码按钮。RxView.clicks(mBtnClean).subscribe(new Consumer<Object>() {  @Override  public void accept(Object o) throws Exception {    if (mDisposable != null && !mDisposable.isDisposed()) {      //停止倒计时      mDisposable.dispose();      //重新订阅      mDisposable = mObservableCountTime.subscribe(mConsumerCountTime);      //按钮可点击      RxView.enabled(mBtnSendMsm).accept(true);      RxTextView.text(mBtnSendMsm).accept("发送验证码");    }  }});

@Overrideprotected void onDestroy() {  super.onDestroy();  if (mDisposable != null) {    mDisposable.dispose();  }}