XML : Get text from server and save it on device

So i'm trying to make an app for my gaming network and i want the app to display for example the changelog from one server.

I tried to implement this text into an String file, but it's to big and gets updated very often. Then i tried it with a webview, but it also didn't work for me, because you need Internet

So what i want is a text file (or something similar) on a server which will automatically show up in the app and stays there even if you are offline. Any ideas?

I'm new to android programming so sorry if this is a stupid question, but i can't find any helpful articles or videos.