Originally posted on:http://www.kylethielk.com/blog/include-native-so-library-in-apk-with-android-studio/

Using the Android NDK is well documented throughout the internet if you are still using Eclipse. The process is basically the same with Android Studio until the time comes to build your APK. The APK will build fine, but your library *.so file will be missing from the APK and when you attempt to load it with System.loadLibrary(“mylibrary”) you will get:

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java.lang.UnsatisfiedLinkError: Couldn‘t load mylibrary from loader dalvik.system.PathClassLoader

You can view the contents of your APK with the following command to verify libmylibrary.so is not in the APK:

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unzip -l MyApp.apk

Android Studio’s build tool will not look in the usual place:

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SharedLibrary  : libmylibrary.soInstall        : libmylibrary.so => libs/armeabi/libmylibrary.so

The trick (thanks to this thread: https://groups.google.com/forum/#!msg/adt-dev/nQobKd2Gl_8/Z5yWAvCh4h4J) is to move libmylibrary.so to:

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src/main/jniLibs/armeabi/libmylibrary.so

Voila, your native code is now compiled into your APK. This should work with build tools 0.8+

Include Native *.so Library in APK With Android Studio