How to use

retrieveRequestToken

method

in

oauth.signpost.commonshttp.CommonsHttpOAuthProvider

@Override
protected Void doInBackground(Void... params) {
  try {
    requestTokenUrl = oAuthProvider.retrieveRequestToken(oAuthConsumer, callbackUrl);
  } catch (OAuthException oe) {
    Log.e(TAG, "Could not retrieve request token", oe);
    oAuthException = oe;
    cancel(false);			
  }
  
  return null;
}

String authUrl = provider.retrieveRequestToken(consumer, CALLBACK_URL);
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(authUrl)));

authUrl = mHttpOauthprovider.retrieveRequestToken(
    mHttpOauthConsumer, CALLBACK_URL);