duolabs/apk2java is a Docker image that lets you decompile an APK to Java in a single step.
This image is based on the cryptax/androidre image. We've removed tools we didn't need and adjusted the image to focus on only extracting resources and decompiling the APK.
apk2java expects a volume to be mounted at /apk. To use the image, simply change into the directory containing yourapk.apk and run docker run -v $(pwd):/apk duolabs/apk2java /apk/yourapk.apk.
If successful, you will see two directories created: "yourapk.apk.files" (the resources) and "yourapk.apk.src" (the decompiled Java source code).