MediaPlayer

https://www.cnblogs.com/plokmju/p/android_MediaPlayer.html

https://my.oschina.net/yuanxulong/blog/372984

surfaceview遮挡问题

http://www.mamicode.com/info-detail-1271422.html

在调用setZOrderOnTop(true)之后调用了setZOrderMediaOverlay(true)

视频播放的几种方式

http://www.jb51.net/article/89020.htm