Setting up local timers in fragments/activities

TimerExample.java

public class DummyFragment extends Fragment {
	private UpdateHandler handler;
	private Timer timer;
  
  @Override
	public void onCreate(Bundle savedInstanceState) {
		handler = new UpdateHandler(this);
		super.onCreate(savedInstanceState);
	}
  
  @Override
	public void onResume() {
		Calendar c = Calendar.getInstance(Locale.getDefault());
		timer = new Timer("MyTimer", true);
		timer.scheduleAtFixedRate(new UpdateTask(), 1000 - c.get(Calendar.MILLISECOND), 1000);
		super.onResume();
	}

	@Override
	public void onPause() {
		timer.cancel();
		timer.purge();
		super.onPause();
	}
  
  private class UpdateTask extends TimerTask {
		private From from;
		private final Bundle bundle = new Bundle();
		private List<TestEntity> items;
		private long[] ids;

		public void run() {
			if (from == null) {
				from = new Select().from(TestEntity.class).where("Date IS NOT NULL");
			}
			items = from.execute();
			if (items.size() > 0) {
				if(ids == null || ids.length != items.size()) {
					ids = new long[items.size()];
				}
				for (int i = 0; i < items.size(); i++) {
					ids[i] = items.get(i).getId();
				}
				
				bundle.clear();
				bundle.putLongArray("ids", ids);
				Message msg = handler.obtainMessage(0);
				msg.setData(bundle);
				handler.sendMessage(msg);
			}
		}
	}
  private static class UpdateHandler extends Handler {
		final private WeakReference<DummySectionFragment> reference;
		
		public UpdateHandler(DummySectionFragment parent) {
			this.reference = new WeakReference<DummySectionFragment>(parent);
		}

		@Override
		public void handleMessage(Message msg) {
			super.handleMessage(msg);
			DummySectionFragment fragment = reference.get();
			if(fragment != null) {
				Bundle bundle = msg.getData();
				long[] ids = bundle.getLongArray("ids");
				for (int c = 0; c < ids.length; c++) {
					int start = fragment.listView.getFirstVisiblePosition();
					for (int i = start, j = fragment.listView.getLastVisiblePosition(); i <= j; i++)
						if (ids[c] == ((TestEntity) fragment.listView.getItemAtPosition(i)).getId()) {
							View view = fragment.listView.getChildAt(i - start);
							((TestListAdapter) fragment.listView.getAdapter()).getView(i, view, fragment.listView);
							break;
						}
				}
			}
		}
  }
}