做的是一个简易的音乐播放器，有上一曲、下一曲、暂停、播放、随机播放、单曲循环、播放等功能，主要用了service+广播做的，界面做的还可以，适合初学者参考学习-Do is a simple music player, with a song, the next song, pause, play, random play, single cycle, broadcast, and other functions, mainly made