TimelineFragment.java

package net.udrunk;

import java.util.List;
import java.util.Observable;

import net.udrunk.adapters.CheckinAdapter;
import net.udrunk.domain.Checkin;
import net.udrunk.model.Model;
import android.os.Handler;
import android.widget.ListView;

import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
import com.googlecode.androidannotations.annotations.AfterViews;
import com.googlecode.androidannotations.annotations.Bean;
import com.googlecode.androidannotations.annotations.EFragment;
import com.googlecode.androidannotations.annotations.UiThread;
import com.googlecode.androidannotations.annotations.ViewById;

@EFragment(R.layout.timeline)
public class TimelineFragment extends CommonFragment {

	@ViewById
	ListView listView;

	@Bean
	public CheckinAdapter adapter;
	
	public static final int REFRESH_INTERVAL = 10000; 

	private Handler currenRefreshtHandler;
	private Runnable currentRefreshRunnable;

	@AfterViews
	public void afterViews() {
		setRetainInstance(true);
		setHasOptionsMenu(true);
		updateCheckins();
		
		autoRefresh();
	}

	@Override
	public void onDestroy() {
		if (currenRefreshtHandler != null) {
			currenRefreshtHandler.removeCallbacks(currentRefreshRunnable);
		}
		super.onDestroy();
	}

	public void autoRefresh() {
		currenRefreshtHandler = new Handler();
		currentRefreshRunnable = new Runnable() {
			public void run() {
				adapter.notifyDataSetChanged();
				autoRefresh();
			}
		};
		currenRefreshtHandler.postDelayed(currentRefreshRunnable, REFRESH_INTERVAL);
	}

	@Override
	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
		inflater.inflate(R.menu.feed_menu, menu);
		super.onCreateOptionsMenu(menu, inflater);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case R.id.refresh_item_menu:
			model.retrieveCheckins();
			return true;
		}
		return (super.onOptionsItemSelected(item));
	}

	@UiThread
	public void updateCheckins() {
		if (model != null) {
			List<Checkin> checkins = model.getCheckins();

			adapter.updateItems(checkins);
			listView.setAdapter(adapter);
		}
	}

	protected UdrunkActivity getUdrunkActivity() {
		return (UdrunkActivity) getActivity();
	}

	@Override
	public void update(Observable observable, Object data) {
		if (data.equals(Model.CHECKINS_UPDATED)) {
			updateCheckins();
		}
	}
}