Student notes taking app

Hi i want an application which contain the functionality of 2 modules basically one is student and second is teacher, so when teacher module from their login post an pdf or any reading stuff from their login by simply clicking on note functionality and posting it, then on student module it should be visible whatever teacher has posted any such as pdf or text document etc and it should have some other functionality like changing their username or name etc and it should have sql database connected to it and this application should be developed or made in android studio using java