(Android, as the first complete, open and free mobile phone platform, has been a hot topic in the industry since its launch because of its outstanding portability and powerful functions The use of embedded devices has played an outstanding momentum. In terms of graphic display, Android is built on Linux, but unlike some desktop Linux, it does not use GTK (GIMP Toolkit) to build XWindows (a multi platform graphical user interface). Instead of using Cairo vector graphics link library to achieve graphics display, we use Skia, a 2D vector graphics management function library that is improved for Android. The 3D graphics is implemented based on the embedded 3D graphics algorithm standard OpenGL/ES. The library can use hardware acceleration. But. Although Coog] e opened the source code of Android. But there are few related technical documents, and the implementation principle of graphics system is more complex So this paper will focus on the underlying principle of Android graphics system. This document includes the following annexes:)
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