title: twitter4j: getting access token based on twitter callback url
body: <p>I have an android app that has an activity flow as follows:</p>
  
  <pre><code>1. Go to main activity, click Login button
  2. Get redirected to the Twitter OAuth page
  3. Have my app handle a URL like the one below:
  oauth://com.galebach.Twitter_oAuth?oauth_token=xnpuie0lmqoPCAvdeitL0CTBgHogwj09nlDbATEk&amp;oauth_verifier=dWMekKAb9aig3ja7skuzXY9SOP9QLZlRbJjLW5UOM
  </code></pre>
  
  <p>My question is, how can I use the token and verifier in that URL to get a Twitter AccessToken? The problem is that while I have the oauth_token, all of the functions for getting access tokens seem to want RequestTokens and a verifier as input, and I don't know how to build a RequestToken out of the raw string in the URI.</p>