Material Navigation Drawer - Android

Question

i need help with a navigation drawer tutorial, the youtube tutorial is this one: Youtube Tutorial

So.. im very new to android, this isnt my kind of work, but i was asked to create a simple app for a company, i just need help to create a navigation drawer, because i will use a webview inside, the problem is, how can i open a new activity when i choose and option? or how can i have just one webView in activity_main and when i choose an option the webview URL changes.

This is the code in question(Ben´s code)

ben´s code

Thank you guys..

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EDIT:

So with the bens code i can do something like this?

@Override
public int getItemViewType(int position) {
    // if (position == 0)
    // return HEADER_TYPE;
    // return ROW_TYPE;

    switch (position) {
        case 0:
            //do something
        default:
            //do something
    }
    return HEADER_TYPE;
}