(I think this is the source code of the Android version of rockplayer, but it is not clear whether it is the official version. It is found from the Android learning examples, and may be imitated. However, the code is also quite complete, which is still worth reference. For learning, it is very effective for all-around players to write Android writing examples. In 2009, there was an Android lockplayer full format video player program, which caused a sensation at that time, In particular, the highly optimized FFMpeg decoder has attracted the attention of the industry. This document includes the following annexes:)