看到很多书中都没有对PreferenceActivity做介绍，而我正好又在项目中用到，所以就把自己的使用的在这总结一下，也方便日后查找。欢迎下载-To see many of his books are not PreferenceActivity introduction, and I just used in the project, so put their own use to sum up in this, and also easy to find later. Welcome t