Using Qt Creator to cross-compile and debug Raspberry Pi Qt5 apps

Have you ever wonder how to setup Qt Creator in your powerful workstation to develop Qt apps that can be deployed and tested in your Raspberry Pi (reachable from such workstation)?

QWidget: Must construct a QApplication before a QWidget

Have you faced such error message? It's specially likely to appear if you are using Qt framework along with 3rd party libraries. The solution?

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.