Requirements

Make sure gradle can see the sdk.dir and ndk.dir variables. If for some reason you don't have those exposed and gradle complains, you can add them to a local.properties file like so:

sdk.dir=/path/to/Android/Sdk
ndk.dir=/path/to/Android/Ndk/android-ndk-r20b/

To know if you are passing the correct path, check that each path provided contains a platforms folder.

Building

Skip linting with -x lint as this unnecessarily pulls in dependencies

To build debug/release apks: gradle build -x lint

To automatically build and install apks: gradle installDebug -x lint