一、界面截图

二、关键代码

实现音乐播放器播放、暂停、停止、上下曲切换的代码：

    ImageButton play = (ImageButton) findViewById(R.id.play);    switch (v.getId()) {        case R.id.play:   //播放暂停            if (!mediaPlayer.isPlaying()) {                    mediaPlayer.start();                    play.setImageResource(R.drawable.pause);            }else{                mediaPlayer.pause();                play.setImageResource(R.drawable.play);            }            break;        case R.id.stop: //停止            if (mediaPlayer.isPlaying()) {                mediaPlayer.reset();                initMediaPlayer(i);                play.setImageResource(R.drawable.play);            }            break;        case R.id.next://下一首            if (mediaPlayer != null && i < 4 && i >= 0) {                mediaPlayer.reset();                if (i == 3) {                    i = 0;                } else {                    i = i + 1;                }                initMediaPlayer(i);                play.setImageResource(R.drawable.pause);                mediaPlayer.start();            }            break;        case R.id.preceding://上一首            if (mediaPlayer != null && i < 4 && i >= 0) {                mediaPlayer.reset();                if (i ==0 ) {                    i = 3;                } else {                    i = i - 1;                }                initMediaPlayer(i);                play.setImageResource(R.drawable.pause);                mediaPlayer.start();

            }break;    }

三、coding代码链接：https://git.coding.net/littlegreen19/MusicPlayer.git

四、apk下载地址：https://coding.net/u/littlegreen19/p/MusicPlayer/git/raw/master/app/release/app-release.apk五、视频展示链接：http://user.qzone.qq.com/256741328/photo/V13YTYVk0YXe96/NDR00I9NDwkZLlzMmdwTvwAAAAAAAAA!/