Download and compile the source code
Configure Android Source code download environment (create a directory for downloading script files, download repo script files, create directories for Android source code, initialize, start download Android source code), Android source code directory structure parsing, Download part of Android source code, compile Android source code (initialize compilation environment, select target, compile Android source code) out directory structure resolution, publish your apk as Android built-in program, test system.img file with simulator
Download and compile the Linux kernel source code (download the Linux kernel source code, parse the Linux kernel source code directory, install the Android kernel's compilation environment (prepare, unzip the compiler, verify the cross-compilation environment, install LIBNCURSES5) to configure and compile the Linux kernel)
Download and compile the source code