Rxjava实现获取验证码60秒倒计时效果

/**  * 开始计时  */ public static void startTime(final TextView tvGetCode) {
    final long codeTimes = 60;
    Observable.interval(0, 1, TimeUnit.SECONDS)
            .take(codeTimes - 1)
            .map(new Function<Long, Long>() {
                @Override
                public Long apply(Long aLong) throws Exception {
                    return codeTimes - aLong;
                }
            })
            .observeOn(AndroidSchedulers.mainThread())
            .doOnSubscribe(new Consumer<Disposable>() {
                @Override
                public void accept(Disposable disposable) throws Exception {
                    tvGetCode.setEnabled(false);
                }
            })
            .subscribe(new Observer<Long>() {
                @Override
                public void onSubscribe(Disposable d) {

                }

                @Override
                public void onNext(Long value) {
                    tvGetCode.setText("剩余" + value + "秒");
                }

                @Override
                public void onError(Throwable e) {

                }

                @Override
                public void onComplete() {
                    tvGetCode.setEnabled(true);
                    tvGetCode.setText("获取验证码");
                }
            });
}