Default [Q] rosannaholt

I'm trying to create an app for the 1st time. I've downloaded the Android Studio, however, whenever I try to launch a notice tells me 'The environment variable JAVA_HOME (with a value I cannot disclose yet because xdl won't allow me) does not point to a valid JVM installation. I've tried a few times to uninstall / reinstall both Java and Android Studio to make sure I have the latest version and I've re-entered the Java location by searching it's properties and entering them on advanced settings. Any help really appreciated