Android How to build/Pre/pre-compile files (execute programs, applications, APK, Jar, LIB, etc.) into the system

Method One:
Suppose the software name to be built is Iperf.exe
1. Place the iperf.exe in any of the codebase directories (the directory must be searchable when searching for android.mk), such as System/iperf/iperf.exe
2. In the System/iperf directory, add a android.mk file that reads as follows:
Local_path:= $ (call My-dir)
Product_copy_files + = $ (local_path)/iperf.exe:system/iperf/iperf.exe
Recompile codebase, the file will be built into the System/iperf directory of your phone
This method prohibits copying the apk file
Method Two:
can use prebuilt method, but the file format is required

Android How to build/Pre/pre-compile files (execute programs, applications, APK, Jar, LIB, etc.) into the system