Hi,
In general, all the build actions from Qt Creator’s compile output should be replicated in a custom project in VisualGDB to be able to build. Post a copy of the build output from Visual Studio here, so we can see what the errors are.
For debugging, you can also use the APK file Qt Creator creates. Simply use the aligned APK file with the “Android->Debug a Custom APK file” feature. There is a tutorial on this feature here.