How do I use the Google URL Shortener API on Android?

Question

After much fiddling with trying to import the libraries myself, I finally managed to find out that I can do so using the Google Plugin for Eclipse, here.

However, I

Answer 1

1. add to your manifest in application node:

 <meta-data
         android:name="com.google.android.urlshortener.API_KEY"
         android:value="{YOUR_API_KEY}"/>

2. add folowing libraries:

google-api-client-1.17.0-rc.jar

google-api-client-android-1.17.0-rc.jar

google-api-services-urlshortener-v1-rev22-1.17.0-rc.jar

google-http-client-1.17.0-rc.jar

google-http-client-android-1.17.0-rc.jar

3. method:

      String shorten(String longUrl){
   
      Urlshortener.Builder builder = new Urlshortener.Builder (AndroidHttp.newCompatibleTransport(), AndroidJsonFactory.getDefaultInstance(), null);
      Urlshortener urlshortener = builder.build();
   
       com.google.api.services.urlshortener.model.Url url = new Url();
       url.setLongUrl(longUrl);
       try {
          url = urlshortener.url().insert(url).execute();
           return url.getId();
       } catch (IOException e) {
           return null;
      }
   }
   

Answer 2

First create a project on google console and enable url shortner api and get api key and the use the following Asynctask to get shortened url.

 public class newShortAsync extends AsyncTask<Void,Void,String> {

        String longUrl="http://stackoverflow.com/questions/18372672/how-do-i-use-the-google-url-shortener-api-on-android/20406915";
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            progressBar.setVisibility(View.VISIBLE);
         }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            progressBar.setVisibility(View.GONE);
            System.out.println("JSON RESP:" + s);
            String response=s;
            try {
                JSONObject jsonObject=new JSONObject(response);
                id=jsonObject.getString("id");
                System.out.println("ID:"+id);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }

        @Override
        protected String doInBackground(Void... params) {
            BufferedReader reader;
            StringBuffer buffer;
            String res=null;
            String json = "{\"longUrl\": \""+longUrl+"\"}";
            try {
                URL url = new URL("https://www.googleapis.com/urlshortener/v1/url?key=YOUR_API_KEY");
                HttpURLConnection con = (HttpURLConnection) url.openConnection();
                con.setReadTimeout(40000);
                con.setConnectTimeout(40000);
                con.setRequestMethod("POST");
                con.setRequestProperty("Content-Type", "application/json");
                OutputStream os = con.getOutputStream();
                BufferedWriter writer = new BufferedWriter(
                        new OutputStreamWriter(os, "UTF-8"));

                writer.write(json);
                writer.flush();
                writer.close();
                os.close();

                int status=con.getResponseCode();
                InputStream inputStream;
                if(status==HttpURLConnection.HTTP_OK)
                inputStream=con.getInputStream();
                else
                    inputStream = con.getErrorStream();

                reader= new BufferedReader(new InputStreamReader(inputStream));

                buffer= new StringBuffer();

                String line="";
                while((line=reader.readLine())!=null)
                {
                    buffer.append(line);
                }

                res= buffer.toString();

            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (ProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return res;




        }
    }

and then just execute this asynctask you will get a json responce in which id is present which is nothing but shortened Url.

Answer 3

Now the Google shorter api needs key to work. I tried set key in manifest but it's not working. Key should be set by function library.

Urlshortener.Builder builder = new Urlshortener.Builder (AndroidHttp.newCompatibleTransport(),
            AndroidJsonFactory.getDefaultInstance(), null);
    Urlshortener urlshortener = builder.build();

    com.google.api.services.urlshortener.model.Url url = new com.google.api.services.urlshortener.model.Url();
    url.setLongUrl(longUrl);
    try {
        Urlshortener.Url.Insert insert=urlshortener.url().insert(url);
        insert.setKey("Your API KEY");
        url = insert.execute();
        return url.getId();
    } catch (IOException e) {
        LogUtil.e(TAG, Log.getStackTraceString(e));
        return null;
    }

Answer 4

You can also use gradle apparently

repositories {
mavenCentral()
}

dependencies {
compile 'com.google.apis:google-api-services-urlshortener:v1-rev47-1.22.0'
}

Google Shortner java gradle documentation