question: public void callback ( final long status_id , final String twitlonger_message_id ) throws Exception { final ArrayList < NameValuePair > args = new ArrayList < > ( 2 ) ; args . add ( new BasicNameValuePair ( "application" , app_name ) ) ; args . add ( new BasicNameValuePair ( "api_key" , api_key ) ) ; args . add ( new BasicNameValuePair ( "message_id" , twitlonger_message_id ) ) ; args . add ( new BasicNameValuePair ( "twitter_id " , Long . toString ( status_id ) ) ) ; try { final HttpClient httpclient = new DefaultHttpClient ( ) ; final HttpPost httppost = new HttpPost ( TWITLONGER_API_CALLBACK ) ; httppost . setEntity ( new UrlEncodedFormEntity ( args , "UTF-8" ) ) ; final HttpResponse response = httpclient . execute ( httppost ) ; final String responseStr = EntityUtils . toString ( response . getEntity ( ) , "UTF-8" ) ; final XmlPullParserFactory factory = XmlPullParserFactory . newInstance ( ) ; factory . setNamespaceAware ( true ) ; final XmlPullParser parser = factory . newPullParser ( ) ; parser . setInput ( new StringReader ( responseStr ) ) ; int eventType = parser . getEventType ( ) ; String tagName ; boolean lookingForEndOfUnknownTag = false ; String unknownTagName = null ; do { if ( eventType == XmlPullParser . START_TAG ) { tagName = parser . getName ( ) ; if ( TAG_TWITLONGER . equals ( tagName ) ) { eventType = parser . next ( ) ; break ; } throw new RuntimeException ( "Expecting " + TAG_TWITLONGER + " , got " + tagName ) ; } eventType = parser . next ( ) ; } while ( eventType != XmlPullParser . END_DOCUMENT ) ; boolean endOfDocument = false ; while ( ! endOfDocument ) { switch ( eventType ) { case XmlPullParser . START_TAG : { if ( lookingForEndOfUnknownTag ) { break ; } tagName = parser . getName ( ) ; if ( TAG_POST . equalsIgnoreCase ( tagName ) ) { } else if ( TAG_ERROR . equalsIgnoreCase ( tagName ) ) throw new TwitLongerException ( "Server returned error response: " + parser . nextText ( ) ) ; else { lookingForEndOfUnknownTag = true ; unknownTagName = tagName ; } break ; } case XmlPullParser . END_TAG : { tagName = parser . getName ( ) ; if ( lookingForEndOfUnknownTag && tagName . equals ( unknownTagName ) ) { lookingForEndOfUnknownTag = false ; unknownTagName = null ; } break ; } case XmlPullParser . END_DOCUMENT : { endOfDocument = true ; } } eventType = parser . next ( ) ; } } catch ( final IOException e ) { throw new TwitLongerException ( e ) ; } catch ( final XmlPullParserException e ) { throw new TwitLongerException ( e ) ; } }
target:  Performs the Twitlonger callback, should be done after successfully using the 'post' method.