rxbinding防抖动无效什么原因

RxView.clicks(activityNewsButton)
                .throttleLast(1000,TimeUnit.MICROSECONDS)
                .subscribe(new Action1<Void>() {
                    @Override
                    public void call(Void aVoid) {
                        System.out.println("click");
                    }
                });

经过调试，这样子还是会输出很多个click，好像并没有成功防抖动，为什么
还有compoundbutton也不能实现这个功能

RxCompoundButton.checkedChanges(schoolBusSwitchButton)
                .throttleLast(1000, TimeUnit.MICROSECONDS)
                .subscribe(new Action1<Boolean>() {
                    @Override
                    public void call(Boolean aBoolean) {
                        System.out.println("switch");
                    ｝
                ｝);

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throttleFirst