"ionic serve" works correctly; "ionic emulate android" just displays android emulator home screen

Looks like your app doesnt even build. Weird that it doesn’t give you any errors. Are your path variables setup correctly? Maybe go through this and check if everything is setup properly: http://www.tiagoporto.com/blog/environment-setting-tutorial-ionic-android-on-windows/
Is ionic build android for you? Are there any .apk s in your build folder?