I unzipped an apk file and got one libxx.so file. I find that there are some "exported"(but I guess the "fun" function is not exported by the original programer) functions in this library by IDA Pro, like this:
Now I can call the "stringFromJNI" function by add this library to my Android project. But is it possible to call the "fun" function? Should I call it by JNI or dlopen(I have tried dlopen but got "undefined symbol:JNI_OnLoad" error)? And how?