android widget 讲解得很详细: http://www.cnblogs.com/TerryBlog/archive/2010/07/29/1788319.html http://blog.csdn.net/meshless/article/details/6963670 扩展部分较好: http://wenku.baidu.com/view/9de5ee1314791711cc7917f9.html 便签widget: http://blog.csdn.net/silenceburn/article/details/6093074