(It has collected effective basic instance source code that can be used by a wide range of Android enthusiasts for reference by Android beginners, including Android menu, Listview, TextView, HTTP, touch screen unit, Android download program, read and inject XML, image preview imageView, Android animation instance, Android prompt box alertDialog, etc., which are basic Android modules, To lay a foundation for the preparation of large-scale Android applications. This material includes the following attachments:)