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Android build

Prerequisites

  • meson
  • Java JDK >= 17

Compiling

Cross Compiling is only possible on linux-like systems.

We use meson and cross-compilation files with the android NDK. This is a two step compilation process. We support all 4 architectures, that the NDK support, namely: armeabi-v7a, arm64-v8a, x86, x86_64. You can build the apk and shared libraries for all of them or just for the one your android has (Hint: Emulators use x86_64 mostly, modern android phones arm64-v8a).

To build all just don't specify any architecture in the build steps.

The first step runs a shell script, that downloads the used Android NDK and builds the .so (shared library) that we use with and Android Java App, it so you just need to run:

./platforms/build-android.sh <arch> # one of the 4 mentioned ones, or nothing, to build all

After that we need to make aan apk that consists of the shared library and the Native Android Java Code. To build this you need a java JDK >= 17.

To built it, run this command:

cd platforms/android/
./gradlew assembleDebug --no-daemon -PANDROID_ABI=<arch>  # one of the 4 mentioned ones, or nothing, to build all

After that you can find the apk in platforms/android/app/build/outputs/apk/debug/app-<arch>-debug.apk