Three Ways of Polling in Android

In this paper, we share the way of Android polling for your reference. The specific contents are as follows

1. Implementation via rxjava (Lambda expression used in code)

private static final int PERIOD = 10 * 1000;
private static final int DELAY = 100;
private Disposable mDisposable;
/**
 *  Timing cycle task 
 */
private void timeLoop() {
  mDisposable = Observable.interval(DELAY, PERIOD, TimeUnit.MILLISECONDS)
      .map((aLong -> aLong + 1))
      .subscribeOn(Schedulers.io())
      .observeOn(AndroidSchedulers.mainThread())
      .subscribe(aLong -> getUnreadCount());//getUnreadCount() Tasks performed 
}
// Turn off timed tasks 
if (mDisposable != null) mDisposable.dispose();

2. Implementation via Handler

private Handler mHandler = new Handler(Looper.getMainLooper()); //  Global variable 
private Runnable mTimeCounterRunnable = new Runnable() {
  @Override
  public void run() {// Add the interface to be rotated here 
getUnreadCount();//getUnreadCount() Tasks performed 
    mHandler.postDelayed(this, 20 * 1000);
  }
};
// Turn off timed tasks 
mHandler.removeCallbacks(mTimeCounterRunnable);

3. Timer and TimerTask implementations using Java

private static final int PERIOD = 10 * 1000;
private static final int DELAY = 100;
private Timer mTimer;
private TimerTask mTimerTask;
private void timeLoop2(){
  mTimer = new Timer();
  mTimerTask = new TimerTask() {
    @Override
    public void run() {
      // Add polling here 
    }
  };
  mTimer.schedule(mTimerTask,DELAY,PERIOD);
}
// Turn off timed tasks 
if (mTimer != null) mTimer.cancel();