Android Mp3Player Service

package com.lab2.Mp3Player;

import com.lab2.assignment2.R;

import java.util.ArrayList;
import java.util.HashMap;

import android.app.ActionBar;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class TracksList extends ListActivity{
	public ArrayList<HashMap<String, String>> tracks = new ArrayList<HashMap<String, String>>();

	@Override
	public void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.trackslist);
		
		ActionBar ab = getActionBar();
		ab.setDisplayHomeAsUpEnabled(true);
		
		ArrayList<HashMap<String, String>> tracksInfo = new ArrayList<HashMap<String, String>>();
		FetchMedia ftm = new FetchMedia();
		
		this.tracks = ftm.getTracks(); // Fetching media from SD-card
		
		for(int i=0; i < tracks.size(); i++){
			HashMap<String, String> track = tracks.get(i);
			
			tracksInfo.add(track);
		}
		
		ListAdapter adapter = new SimpleAdapter(this, tracksInfo, R.layout.trackslist_item, 
				new String [] {"title"}, new int [] {R.id.trackTitle});
		
		setListAdapter(adapter);
		
		
		ListView lv = getListView();
		lv.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view, int position,
					long id) {
				// TODO Auto-generated method stub
				int trackIndex = position;
				
				Intent it = new Intent(getApplicationContext(), Mp3Main.class);
				it.putExtra("trackIndex", trackIndex);
				setResult(Activity.RESULT_OK, it);
				finish();
			}
		});
	}
	
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		//return super.onOptionsItemSelected(item);
		switch(item.getItemId()){
		case android.R.id.home:
			Intent it = new Intent(this, Mp3Main.class);
			it.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
			startActivity(it);
			finish();
			return true;
		default:
			return super.onOptionsItemSelected(item);
		}
	}
	
}

	private Mp3Service srv = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.mp3main);

		Intent it = new Intent(main, Mp3Service.class);
		main.bindService(it, Mp3Connection, Context.BIND_AUTO_CREATE);
		....
		....
		....
	}

		@Override
	public boolean onCreateOptionsMenu(Menu menu){
		// TODO Auto-generated method stub
		getActionBar().setDisplayHomeAsUpEnabled(true);
		MenuInflater inflater = getMenuInflater();
		inflater.inflate(R.menu.mp3_menu, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// TODO Auto-generated method stub
		//return super.onOptionsItemSelected(item);
		Intent it;
		switch(item.getItemId()){
		case R.id.playlist:
			it = new Intent(this, TracksList.class);
			startActivityForResult(it, 0);
			playlist = true;
			return true;
		case android.R.id.home:
			it = new Intent(this, com.lab2.MainList.MainList.class);
			it.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
			startActivity(it);
			return true;
		default:
			return super.onOptionsItemSelected(item);
		}
	}

	private void playTrack(int index) {
		// TODO Auto-generated method stub
		try {
			srv.playTrack(index);

			String track_title = srv.tracks.get(index).get("title");
			title.setText(track_title);

			play.setImageResource(R.drawable.img_btn_pause);
			progressbar.setProgress(0);
			progressbar.setMax(100);

			updateProgressBar();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (IllegalStateException e){
			e.printStackTrace();
		}
	}

	@Override
	protected void onResume() {
		// TODO Auto-generated method stub
		super.onResume();
		
		// Push and Pop an empty notification
		ShowDummyNotification();
		nf.cancel(ID);
	}

	@Override
	public void onBackPressed() {
		// TODO Auto-generated method stub
		super.onBackPressed();
		onClose();
	}

	@Override
	protected void onStop() {
		// TODO Auto-generated method stub
		super.onStop();
		if(!close)	
			showInfoNotification();
		if(bound){
			unbindService(Mp3Connection);
			bound = false;
		}
	}

	private void onClose() {
		// TODO Auto-generated method stub
		Mp3Service.shuffleTrack = false;
		Mp3Service.repeatTrack = false;
		Mp3Service.trackIndex = 0;
		close = true;
		srv.Stop();
		finish();
	}

	private ServiceConnection Mp3Connection = new ServiceConnection() {

		@Override
		public void onServiceDisconnected(ComponentName name) {
			// TODO Auto-generated method stub
			srv = null;	
		}

		@Override
		public void onServiceConnected(ComponentName name, IBinder service) {
			// TODO Auto-generated method stub
			srv = ((Mp3Service.myBinder)service).getService();
			bound = true;
		}
	};

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		// TODO Auto-generated method stub
		super.onActivityResult(requestCode, resultCode, data);
		if(resultCode == RESULT_OK){
			Mp3Service.trackIndex = data.getIntExtra("trackIndex", 0);
			playTrack(Mp3Service.trackIndex);
			playlist = false;
		}
	}

package com.lab2.Mp3Player;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Random;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Binder;
import android.os.IBinder;

public class Mp3Service extends Service{
	private final IBinder myBinder = new myBinder();

	public ArrayList<HashMap<String, String>> tracks = new ArrayList<HashMap<String, String>>();

	public static int trackIndex = 0;
	public static boolean shuffleTrack = false;
	public static boolean repeatTrack = false;

	private FetchMedia ftm;

	public static MediaPlayer mp;
	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		return myBinder;
	}

	public class myBinder extends Binder{
		Mp3Service getService(){
			return Mp3Service.this;
		}
	}

	@Override
	public void onCreate(){
		// TODO Auto-generated method stub
		ftm = new FetchMedia();
		tracks = ftm.getTracks();

		Thread tr = new Thread(null, run, "Mp3Service");
		tr.start();
	}

	@Override
	public void onDestroy() {
		// TODO Auto-generated method stub
		// super.onDestroy(); 
		// Nothing to do here..
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		// TODO Auto-generated method stub
		return Service.START_NOT_STICKY;
	}

	Runnable run = new Runnable(){
		@Override
		public void run() {
			// TODO Auto-generated method stub

			mp = new MediaPlayer();
			try{
				mp.setOnCompletionListener(new OnCompletionListener() {

					/* Method called when track ends 
					 * to play next track.
					 */
					@Override
					public void onCompletion(MediaPlayer mp) {
						// TODO Auto-generated method stub
						if(repeatTrack)
							playTrack(trackIndex);
						else if(shuffleTrack){
							Random rand = new Random();
							trackIndex = rand.nextInt(tracks.size() - 1);
							playTrack(trackIndex);
						}
						else{
							// no repeat or shuffle ON - play next song
							if(trackIndex < (tracks.size() - 1)){
								playTrack(trackIndex + 1);
								trackIndex += 1;
							}else{
								// play first song
								playTrack(0);
								trackIndex = 0;
							}
						}

					}

				}); 
			} 
			catch(Exception e){

			}
		}
	};

	public boolean isPlaying(){
		return mp.isPlaying();
	}

	public boolean shuffle(){
		return shuffleTrack;
	}

	public boolean repeat(){
		return repeatTrack;
	}

	public void pause(){
		mp.pause();
	}

	public void start(){
		mp.start();
	}

	public void seekTo(int progress){
		mp.seekTo(progress);
	}

	public int getDuration(){
		return mp.getDuration();
	}

	public int getPosition(){
		return mp.getCurrentPosition();
	}

	public void Stop(){
		mp.stop();
		this.stopSelf();
	}

	public void playTrack(int index){
		try{
			mp.reset();
			mp.setDataSource(tracks.get(index).get("path"));
			mp.prepare();
			mp.start();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (IllegalStateException e){
			e.printStackTrace();
		} catch (IOException e){
			e.printStackTrace();
		}
	}

}