WebView URL from user's settings ? HELP!

I'm currently (trying) to make a app that simply displays a webpage.. However, I want to be able in the settings for the user to select the URL & port.. But finding it hard to do!

Basically, If the user presses the options button all I need is a box with two options..

IP:
Port:
So it'll look something like:

IP Address:

[ INPUT BOX HERE FOR IP ADDRESS (*@IP_ID*) ]

Port Number:

[ INPUT BOX HERE FOR Port ID (*@Port_ID*) ]

Then within the code for the webview..
The code is:

webView = (WebView) findViewById(R.id.webView1);

startWebView("MY DEFAULT URL"

All I basically need to do is change the IP & Port to what the user puts into the settings.. So..

startWebView("**@IP_ID** : **@Port_ID**"

I'm pretty new to making app's but have previously done PHP, C++ & MySQL ect.. But this has just thrown me off a little..

I've asked a couple of other places but they just direct my to the android dev page which throws me off even more

HELP?!