Qt - Distributing Application (apk)
-
Having Closed Source requires you to use the LGPL license. Check the information on the license what to do. tldrlegal has a good overview. In the end you have to provide the license, unchanged Qt-libraries, the executable when using shared libraries. If using static libraries the jurisdication is not quite clear, best is to provide the objectfiles before linking.
Now the most important hint: If you really want to make sure you are doing it correctly, ask a lawyer or buy an indie pack from Qt. Since I am no lawyer everything I said is just my best knowledge up to now and I do not take any responsibility for being correct ;-)