现代的移动应用程序为用户提供了丰富的视觉和听觉体验，其中包括导航和按钮点击时播放音频。为了实现这一功能，可以使用Android中的MediaPlayer类和相关的事件侦听器。下面是示例代码：

1.在布局中添加一个播放按钮

2.在活动中实现MediaPlayer和相关的事件侦听器

public class MainActivity extends AppCompatActivity implements
    MediaPlayer.OnPreparedListener, MediaPlayer.OnErrorListener,
    View.OnClickListener {

    private MediaPlayer mMediaPlayer;
    private Button mPlayButton;

    private static final String AUDIO_URI = "http://example.com/audio.mp3";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mMediaPlayer = new MediaPlayer();
        mMediaPlayer.setOnPreparedListener(this);
        mMediaPlayer.setOnErrorListener(this);

        mPlayButton = findViewById(R.id.play_button);
        mPlayButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        if (v.getId() == R.id.play_button) {
            mMediaPlayer.reset();
            try {
                mMediaPlayer.setDataSource(AUDIO_URI);
                mMediaPlayer.prepareAsync();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public void onPrepared(MediaPlayer mp) {
        mp.start();
    }

    @Override
    public boolean onError(MediaPlayer mp, int what, int extra) {
        Toast.makeText(this, R.string.audio_error, Toast.LENGTH_SHORT).show();
        return true;
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mMediaPlayer.release(); //释放资源
    }
}