how to play audio file in android

@Niranjan, If you are using a raw file from res/raw folder, ie., reading a file stored inside the project, we can use:

mediaplayer.setDataSource(context, Uri.parse("android.resource://urpackagename/res/raw/urmp3name");

If you have to use from SD card:

 MediaPlayer mediaPlayer = new MediaPlayer();
 File path = android.os.Environment.getExternalStorageDirectory();
 mediaPlayer.setDataSource(path + "urmp3filename");

See this related question: MediaPlayer issue between raw folder and sdcard on android

Simply you can use MediaPlayer and play the audio file. Check out this nice example for playing Audio:

 public void audioPlayer(String path, String fileName){
    //set up MediaPlayer    
    MediaPlayer mp = new MediaPlayer();

    try {
        mp.setDataSource(path + File.separator + fileName);
        mp.prepare();
        mp.start();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

If the audio is in the local raw resource:

MediaPlayer mediaPlayer = MediaPlayer.create(context, R.raw.sound_file_1);
mediaPlayer.start(); // no need to call prepare(); create() does that for you

To play from a URI available locally in the system:

Uri myUri = ....; // initialize Uri here
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDataSource(getApplicationContext(), myUri);
mediaPlayer.prepare();
mediaPlayer.start();