一个简易的MP3播放器。虽然界面不是很好，但感觉功能还可以。在此向大家作个介绍，因为我的程序逻辑性比较差，而且里面的注释也比较少，在这里我作一个简单的介绍，希望能对大家有所帮助。-A simple MP3 player. Although the interface is not very good, but can also be sensory function. We take this opportunity to make an introduction, because my program logic rather poor, but there are also fewer notes, I make a brief introduction, I hope we can be helpful.