android studio add third-party library so

That is, create a new jniLibs in the main directory in the Project directory. And create a corresponding version folder, and then copy the so file directly.

If I only have 32 bit so. There is no 64-bit so. then what should we do?

add below android

ndk {
    abiFilters "armeabi", "armeabi-v7a"
}

Keep the abiFilters you want.

For example, arm64-v8a is not written. Then the arm64 will not be used.