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In the game Divide and Conquer, balls would bounce around, and I would try to partition them into small enough spaces so that I could go to the next level where more and more balls would be added.
The first two samples, Triangle and SpriteText, show techniques that would be useful to anyone using the OpenGL ES 3D graphics APIs to write Android applications. The samples contain several reusable classes that may eventually be incorporated (in some form) into the SDK. Chief among these is the GLView class, which abstracts the OpenGL ES book-keeping code from the rest of the application. GLView helps handle the extra work OpenGL ES applications have to do when the activity is paused and resumed, and when the display goes to sleep and wakes up. In the Pause/Resume case the OpenGL surface has to be recreated. In the display sleep / wake-up case the entire OpenGL context has to be recreated.
The third sample, Downloader, shows how to add a downloader activity to your application. The downloader activity runs at the beginning of your application and makes sure that a set of files have been downloaded from a web server to the phone's SD card. Downloader is useful for applications that need more local data than can fit into an .apk file. For example a game could use Downloader to download the game's artwork, sound effects, and level data. The Downloader activity is designed to be a drop-in addition to your application. You customize it by supplying the URL of an XML configuration file which lists the data files that need to be downloaded.
Photostream is a simple photos browser and viewer for Flickr. All you need to use it is a Flickr screen name or user name (the application offers a default user name if you just want to try it.)
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