I'm currently using a Timer and TimerTask to perform some work every 30 seconds.

My problem is that after each time I do this work I want to increment the interval time of the Timer.

So for example it starts off with 30 seconds between the timer firing but I want to add 10 seconds to the interval then so that the next time the Timer takes 40 seconds before it fires.

Here is my current code:

  public void StartScanning() {

    scanTask = new TimerTask() {
        public void run() {
                handler.post(new Runnable() {
                        public void run() {

                            wifiManager.startScan();
                            scanCount++;            
                            if(SCAN_INTERVAL_TIME <= SCAN_MAX_INTERVAL){

                                SCAN_INTERVAL_TIME = SCAN_INTERVAL_TIME + SCAN_INCREASE_INTERVAL;
                                t.schedule(scanTask, 0, SCAN_INTERVAL_TIME);
                            }

                        }
               });
        }};
        Log.d("SCAN_INTERVAL_TIME ** ", "SCAN_INTERVAL_TIME ** = " + SCAN_INTERVAL_TIME);
        t.schedule(scanTask, 0, SCAN_INTERVAL_TIME);

}

But the above gives the following error:

05-26 11:48:02.472: ERROR/AndroidRuntime(4210): java.lang.IllegalStateException: TimerTask is scheduled already

Calling cancel or purge doesn't help.

So I was wondering if anyone can help me find a solution?

Is a timer even the right way to approach this?