First，I know that in an app does not allow mixed use of different architectures of the .so file（Part only uses 32, the other part only uses 64）
So,I tried to Open a new process to dynamically load 64 and 32-bit so files，but System.load（）throw the error and app crashed! How to solve this problem through multiple processes? Or is there any other way to solve this?
Well, I did try. On the face of it, this works: use armeabi shared libs ‘in the usual way’, and run a arm64-v8a executable from Java with Runtime.exec() or from C with system().
You can put the executable in assets and unpack it manually, or you can cheat and rename it so that it starts with lib and ends with .so; now you can put this file in the jniLibs/armeabi directory.
The opposite way works, too: launch 32-bit executable (don’t forget -fPIE) from 64-bit app.
Make sure that the library search paths do not clash.