在您自己的android应用中调用第三方本地库

Question

Is it possible to write code for native libraries you do not have the source code for in your own android app?

For example - RarLab 's android app comes with a native library librarlab_rar.so for at least 4 different platforms.

Assuming that I'm doing this for experimental and copyright isn't an issue and I don't plan to distribute the app externally, is it possible to compile a Java/Kotlin android-based app with only including the native binary in android development tools such as Android Studio or Eclipse?

Answer 1

You would need to disassemble the binary .so file and work out the API yourself. This process is called reverse engineering .

See: How do I reverse engineer .so files found in android APKs? for ideas on how to accomplish the task.

Once you've figured out how to call into the .so file, you can then write your own version of the API which you can then call from Java/Kotlin.

Answer 2

Any lib….so file that you put under jniLibs/$(ABI) folder in your app will automatically get packed to APK and unpacked to the device (provided the ABI matches). You may need to write your own Java wrapper for the libraries, or to reuse the Java classes that you need from the same app.