Preload/store external webpage to faster loading in Android

I have an android app, which loads external webpage and then it shows just some divs in which on button click it start some scripts. When I open the app, whole webpage needs to be loaded from server and it's time and data consuming. What I want to do is to preload/store webpage on phone storage so when i open app, it shows immediately and when I click button then it will connect to the server and execute script and return response.

Is something like this possible? Thanks!