Author provides a guide on how to write C code and run it on Android in about 2 seconds, creating an APK with a size of 25kB with API 26 (45kB with API 30). Surprisingly, the framework allows creating windows with OpenGL ES support, accelerometer/gyro input, multi-touch, android keyboard, asset file storage, permissions, and USB device access. Controversially, author claims no warranty or responsibility for the code and hints at potential issues with commercial app development. The content emphasizes the freedom to innovate beyond traditional restrictions and includes detailed steps for development environment setup on Linux and Windows, highlighting the use of Makefiles for customization.
https://github.com/cnlohr/rawdrawandroid