利用RxJava防止控件二次点击（防抖）

app的build.gradle,导入Rxjava库

implementation : "io.reactivex:rxjava:1.2.10"

1.新建xxxSubscribe类实现Observable.OnSubscribe

 private static final String TAG = "ClickSubscribe";
    private Subscriber mSubscriber;

    public ClickSubscribe(View view) {
        view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                LogUtils.e(TAG, v.getClass().getSimpleName() + "我被点击了");
                mSubscriber.onNext(v);
            }
        });
    }

    @Override
    public void call(Subscriber subscriber) {
        mSubscriber = subscriber;
    }

2.运用操作符

throttleFirst（time,TimeUnit.SECONDS）

如下方式

Observable.create(new ClickSubscribe(nextBtn))
                        .throttleFirst(2, TimeUnit.SECONDS)
                        .subscribe(new Action1() {
                            //todo dothing
                        }

RxJava2版本

    private lateinit var dispose: Disposable
    /**
     * 防止重复点击
     *
     * @param target 目标view
     * @param action 监听器
     */
    fun setOnClickListeners(vararg target: View, action: Action1) {
        for (view in target) {
            dispose = onClick(view)
                .throttleFirst(5000, TimeUnit.MILLISECONDS)
                .subscribe {
                    action.onClick(view)
                }
        }
    }

    /**
     * 防止重复点击
     *
     * @param target 目标view
     * @param action 监听器
     */
    fun setOnClickListeners(target: View, action: Action1) {
        dispose = onClick(target)
            .throttleFirst(1000, TimeUnit.MILLISECONDS)
            .subscribe {
                action.onClick(target)
            }

    }

    /**
     * 监听onclick事件防抖动
     *
     * @param view
     * @return
     */
    @CheckResult
    private fun onClick(view: View): Observable<*> {
        return Observable.create(ViewClickOnSubscribe(view))
    }

    /**
     * onclick事件防抖动
     * 返回view
     */
    private class ViewClickOnSubscribe(val view: View) : ObservableOnSubscribe {

        override fun subscribe(emitter: ObservableEmitter) {

            if (Looper.getMainLooper() != Looper.myLooper()) {
                throw IllegalStateException("Must be called from the main thread. Was: " + Thread.currentThread())
            }

            view.setOnClickListener {
                if (!emitter.isDisposed) {
                    emitter.onNext(view)
                }
            }
        }

    }

    /**
     * A one-argument action. 点击事件转发接口
     * first argument type
     *
     * @param #
     */
    interface Action1 {
        fun onClick(t: View)
    }

}