Answer 1

Are you trying to run it here in Sololearn Playground or is it copied from Android Studio?

Answer 2

fist of all, you dont need those try and catch.

second: to call another "page" in your app use intends (
Intend nextClass = new Intent(this, yourOtherClass.class)
startactivity(nextClass)
(remember it is your class ".class" not ".java")

and third: that is probably what is crashing the app: you cant modify a view of another screen, so go intro your java folder in your project and modify in the right scene

Answer 3

No probs! have fun!