Qt on Android: how to extend and debug the Java part of your Qt application

If you develop Qt application for Android, and your applications make good use of Java code (to interface for Android native libraries for instance), it's very likely you run into the situacion of need for a good development environment of the Java side.
Once again, Bogdan Vatra (the "father" of Qt on Android) describes in this very descriptive blog post the tools that will help you to be more productive when extending Qt on Android applications.

Although focused on examples using Android Studio, I suspect that the steps described there will apply also if you're using Eclipse, even when it has been deprecated in the Android development world.