Android polling example which gets triggered every 10 seconds.

gistfile1.java

protected void getLocationPeriodically() {
  	mHandler = new Handler() {
			@Override
			public void handleMessage(Message msg) {
				Location l = (Location) msg.obj;
				Toast.makeText(getApplicationContext(), "Latitude: " + String.valueOf(l.getLatitude()) + " Longitude: " + String.valueOf(l.getLongitude()),
				Toast.LENGTH_LONG).show();
			}
		};
		new Thread(new Runnable() {
	        @Override
	        public void run() {
	            while (true) {
	                try {
	                    Thread.sleep(10000);
	                    mHandler.post(new Runnable() {

	                        @Override
	                        public void run() {
	                        	Location l = BasicReceiver.fieldLocation;
	                        	Message msg = new Message();
	                        	msg.obj = l;
	                        	mHandler.sendMessage(msg);
	                        }
	                    });
	                } catch (Exception e) {
	                }
	            }
	        }
	    }).start();
	}

`mRunnable=new Runnable() {

                        @Override
                        public void run() {
                        	Location l = BasicReceiver.fieldLocation;
                        	Message msg = new Message();
                        	msg.obj = l;
                        	mHandler.sendMessage(msg);
                                     mHandler.removeCallbacks(mRunnable);
                                    mHandler.postAtTime(mRunnable,10000);
                        }
                    }`

to execute just call
mHandler.post(mRunnable)