genandroidmk

genandroidmk is a tool written in Go that help to integrate prebuilt apps on Android(5.0 and later).

Details of Integration of Prebuilt Apps on Android.

• Before Android 5.0 L
  To integrate prebuilt apps which contains native libraries, you need to:

  1. Write the Android.mk and specify the native libraries in the APK.
  2. Extract the libraries from /lib in APK and copy them to BSP.

• Since Android 5.0 L
  There's no need to extract the libraries in APK and copy them to BSP.
  Android will extract the libs and copy them to /system/app/APP_NAME/lib automatically while building the system image.
  We only need to specify the prebuilt libs(LOCAL_PREBUILT_JNI_LIBS) in Android.mk.

How it Works

• It'll generate LOCAL_PREBUILT_JNI_LIBS and the whole Android.mk automatically.
• It will check the /lib in APK and use a default CPU arch or let users choose the CPU arch of libraries to fill the LOCAL_PREBUILT_JNI_LIBS variable.

How to Use

./genandroidmk -i <input APK file> -n <app name> -d <default arch>
Ex:
./genandroidmk -i WeChat.apk -n WeChat

• Arguments:

  • <input APK file>

    abs path of APK and Android.mk will be outputed in the same folder

  • <app name>

    It will be used to set LOCAL_MODULE in Android.mk
    if it's not set, LOCAL_MODULE will be set to the APK name(without ".apk") by default.

  • <default arch>

    Specify a default architecture. When a default architecture is specified, it will not require users to choose the CPU architecure that's useful for CI / CD integration.

• Choose CPU Arch of native libraries:
  If the APK contains multi-arch native libraries, and there's NO default architecture specified(-d argument), you will be asked to select one arch:

    Please select one of available arches in current APK:
    ====================================
    1: armeabi
    2: armeabi-v7a
    3: x86
  

• Output Android.mk will be put under the same folder as input APK file.

License

• MIT License

Thanks

• Kushtrim Pacaj
  • Contributed the new argument: -d <default arch> that's useful for CI / CD integration