When using a RadioButton with the Material style, deploying on Android, I get the following runtime error:
W libtestRadio.so: (null):0 ((null)): QQmlApplicationEngine failed to load component
W libtestRadio.so: (null):0 ((null)): qrc:/main.qml:24 Type RadioButton unavailable
W libtestRadio.so: file:///data/user/0/org.qtproject.example.testRadio/qt-reserved-files/qml/QtQuick/Controls.2/Material/qmldir:-1 plugin cannot be loaded for module ".data.user.0.org.qtproject.example.testRadio.qt-reserved-files.qml.QtQuick.Controls.2.Material": Module namespace 'QtQuick.Controls.Material' does not match import URI '.data.user.0.org.qtproject.example.testRadio.qt-reserved-files.qml.QtQuick.Controls.2.Material'
I think this is related to ticket
QTBUG-57618, where it is fixed, as some imports were missing.
Don't know whether it can be checked that this is also valid for some other controls, not mentioned here or in the related ticked?