How to successfully run the official demonstration of Android platform provided by SDL?

Description: SDL officially provided an Anroid demo template SDLActivity, which can't be run directly. There will be many problems in the process of operating according to the official documents. Here, I record the process of successful compilation and operation, hoping to help everyone!

Introduction to SDL: SDL stands for simple direct media layer. It is an open source C language cross-platform multimedia development library, which provides a variety of interfaces to control images and sounds, and is widely used in the development of games, media players and simulators.