How to add Sdcards mp3 songs to Listing of Music Player in Android

MusicDroid.java

package com.helloandroid.android.musicdroid;

import java.io.File;

import java.io.FilenameFilter;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import android.app.ListActivity;

import android.media.MediaPlayer;

import android.media.MediaPlayer.OnPreparedListener;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.ListView;

class Mp3Filter implements FilenameFilter {

public boolean accept(File dir, String name) {

return (name.endsWith(".mp3"));

}

}

public class MusicDroid extends ListActivity {

private static final String MEDIA_PATH = new String("/mnt/sdcard/Songs");

private List songs = new ArrayList();

private MediaPlayer mp = new MediaPlayer();

@Override

public void onCreate(Bundle icicle) {

try {

super.onCreate(icicle);

setContentView(R.layout.songlist);

updateSongList();

} catch (NullPointerException e) {

Log.v(getString(R.string.app_name), e.getMessage());

}

}

public void updateSongList() {

File home = new File(MEDIA_PATH);

if (home.listFiles( new Mp3Filter()).length > 0) {

for (File file : home.listFiles( new Mp3Filter())) {

songs.add(file.getName());

}

ArrayAdapter songList = new ArrayAdapter(this,R.layout.song_item,songs);

setListAdapter(songList);

}

}

@Override

protected void onListItemClick(ListView l, View v, int position, long id) {

try {

mp.reset();

mp.setDataSource(MEDIA_PATH + songs.get(position));

mp.setOnPreparedListener((OnPreparedListener) this);

mp.prepare();

mp.start();

} catch(IOException e) {

Log.v(getString(R.string.app_name), e.getMessage());

}

}

}