How to use c lib(.so) from android?

Question

Currently i am working on Android NDK and successfully implementing C code in jni and calling c code using jni on android studio 1.5.

But

Answer 1

Read first my answer here to add *.so libraries:

https://stackoverflow.com/a/33164947/3626214

And now, read here how to solve java.lang.UnsatisfiedLinkError: dlopen failed: on Android 6.X devices because you'll get an error on this devices when you add *.so libraries:

build.gradle

android
        {

            //23 or higher
            compileSdkVersion 23
            buildToolsVersion "23.0.3"


 defaultConfig
                    {
                        ...
                        //important code, write API 22
                        targetSdkVersion 22
                       ...
                    }

...
}