监听器模式
http://blog.csdn.net/crazysusu/article/details/50731991
https://my.oschina.net/u/923324/blog/792857
http://blog.csdn.net/dongnan591172113/article/details/8771441
http://blog.csdn.net/tfygg/article/details/51638933
监听器模式
http://blog.csdn.net/crazysusu/article/details/50731991
https://my.oschina.net/u/923324/blog/792857
http://blog.csdn.net/dongnan591172113/article/details/8771441
http://blog.csdn.net/tfygg/article/details/51638933