TwitLonger utility

TwitLongerHelper.java

public class TwitLongerHelper {

    private static final String UTF_8 = "UTF-8";

    private String api_key;
    private String application;
    private String username;

    public TwitLongerHelper(String api_key, String application, String username) {
        this.api_key = api_key;
        this.application = application;
        this.username = username;
    }

    public TwitLongerResponse post(String message) {
        TwitLongerResponse response = null;
        try {
            HttpPost httpPost = new HttpPost("http://www.twitlonger.com/api_post");

            List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();
            nameValuePairList.add(new BasicNameValuePair("api_key", api_key));
            nameValuePairList.add(new BasicNameValuePair("application", application));
            nameValuePairList.add(new BasicNameValuePair("username", username));
            nameValuePairList.add(new BasicNameValuePair("message", message));
            httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairList, UTF_8));

            String xml = EntityUtils.toString(new DefaultHttpClient().execute(httpPost).getEntity(), UTF_8);
            response = new TwitLongerResponse(xml);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return response;
    }

    public TwitLongerResponse setId(String message_id, String twitter_id) {
        TwitLongerResponse response = null;
        try {
            HttpPost httpPost = new HttpPost("http://www.twitlonger.com/api_set_id");

            List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();
            nameValuePairList.add(new BasicNameValuePair("api_key", api_key));
            nameValuePairList.add(new BasicNameValuePair("application", application));
            nameValuePairList.add(new BasicNameValuePair("message_id", message_id));
            nameValuePairList.add(new BasicNameValuePair("twitter_id", twitter_id));
            httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairList, UTF_8));

            String xml = EntityUtils.toString(new DefaultHttpClient().execute(httpPost).getEntity(), UTF_8);
            response = new TwitLongerResponse(xml);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return response;
    }

    public static String get(String url) {
        String response = null;
        try {
            HttpGet httpGet = new HttpGet("http://api.embed.ly/1/oembed?format=json&url=" + url);
            String jsonString = EntityUtils.toString(new DefaultHttpClient().execute(httpGet).getEntity(), UTF_8);
            response = new JSONObject(jsonString).getString("description");
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return response;
    }

    public static class TwitLongerResponse {

        private String content;
        private String error;
        private String id;
        private String link;
        private String shortLink;

        public TwitLongerResponse(String source) {
            this.content = getTag("content", source);
            this.error = getTag("error", source);
            this.id = getTag("id", source);
            this.link = getTag("link", source);
            this.shortLink = getTag("short", source);
        }

        public String getContent() {
            return content + "";
        }

        public String getError() {
            return error + "";
        }

        public String getId() {
            return id + "";
        }

        public String getLink() {
            return link + "";
        }

        public String getShort() {
            return shortLink + "";
        }

        public boolean isError() {
            return error != null;
        }

        private String getTag(String tag, String source) {
            try {
                XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
                factory.setNamespaceAware(true);
                XmlPullParser xmlPullParser = factory.newPullParser();
                xmlPullParser.setInput(new StringReader(source));

                xmlPullParser.next();
                int eventType = xmlPullParser.getEventType();

                String content = null;
                boolean shouldRead = false;
                while (eventType != XmlPullParser.END_DOCUMENT) {
                    switch (eventType) {
                    case XmlPullParser.START_TAG:
                        if (xmlPullParser.getName().equals(tag)) {
                            shouldRead = true;
                        }
                        break;
                    case XmlPullParser.TEXT:
                        if (shouldRead) {
                            content = xmlPullParser.getText();
                        }
                        break;
                    case XmlPullParser.END_TAG:
                        shouldRead = false;
                        break;
                    }
                    eventType = xmlPullParser.next();
                }
                return content;
            } catch (IOException e) {
                e.printStackTrace();
            } catch (XmlPullParserException e) {
                e.printStackTrace();
            }
            return null;
        }
    }
}