Android Programming: The Big Nerd Ranch Guide

Audio Playback

Create a new class in the com.bignerdranch.android.hellomoon package named AudioPlayer. Leave its superclass as java.lang.Object.

In AudioPlayer.java, add a member variable to hold an instance of MediaPlayer and methods to stop and play this instance.

Listing 13.6  Simple playback code using MediaPlayer (AudioPlayer.java)

public class AudioPlayer {

    private MediaPlayer mPlayer;

    public void stop() {
        if (mPlayer != null) {
            mPlayer.release();
            mPlayer = null;
        }
    }

    public void play(Context c) {
        mPlayer = MediaPlayer.create(c, R.raw.one_small_step);
        mPlayer.start();
    }
}

In the play(Context) method, you call MediaPlayer.create(Context, int). MediaPlayer needs the Context to make sense of the audio file’s resource ID. (There are other