These were my steps to produce an APK for my android build.
In the build,I chose Android, and set the correct package name and the SDK, NDK paths. I was able to build it. It didnt however create an APK but did create the build folder.
I used AndroidStudio to open the build/android/proj and created an APK using that. However, it takes around 10 mins to 20 mins.
Is this the normal process to build an APK ?