Android 兩種輪詢的簡單寫法，供大家參考，具體內(nèi)容如下

public void startPolling() { subscriber = Observable.interval(0, POLLING_INTERVAL, TimeUnit.MILLISECONDS). doOnNext(new Action1<Long>() { @Override public void call(Long aLong) { doPolling(). subscribeOn(Schedulers.io()). observeOn(AndroidSchedulers.mainThread()). subscribe(new Subscriber<String>() {@Overridepublic void onCompleted() {}@Overridepublic void onError(Throwable e) { Log.d(TAG, 'onError');}@Overridepublic void onNext(String response) { handleResponse(response);} }); } }).subscribe();}public void stopPolling() { if (!subscriber.isUnsubscribed()) { subscriber.unsubscribe(); }}private Observable<Param> doPolling() { return Observable.create(new Observable.OnSubscribe<Param>() { @Override public void call(Subscriber<? super Param> subscriber) { //do work subscriber.onNext(response); subscriber.onCompleted(); } });}

在Activity的生命周期里分別調(diào)用start和stop方法，解除輪詢綁定，避免內(nèi)存泄漏。

其它簡單的輪詢方法還有利用handler的postDelay機制實現(xiàn)

@Overridepublic void handleMsg(Message msg) { switch (msg.what) { case MSG_POLLING: doPolling(false); break; ... ... }}private void doPolling(Boolean isFirst) { if(isFirst) { mHandler.removeMessages(MSG_POLLING); mHandler.sendEmptyMessageDelayed(MSG_POLLING, POLLING_INTERVAL); return; } doWork(); //asyn network mHandler.sendEmptyMessageDelayed(MSG_POLLING, POLLING_INTERVAL);}

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