Get Json from URL

//--- REMEMBER TO ADD PERMISSION (android.permission.INTERNET) TO ANDROID MANIFEST !!! ---//

// Background task class
public class HttpGetTask extends AsyncTask<String, Void, String> {

    interface OnHttpGetListener {
        public void httpGetCompleted(String response);
        public void httpGetFailed(String error);
    }

    private OnHttpGetListener mListener;
    private boolean mGetFailed;

    public HttpGetTask(OnHttpGetListener listener) {
        mListener = listener;
    }

    @Override
    protected String doInBackground(String... params) {
        try {
            HttpGet uri = new HttpGet(params[0]);
            DefaultHttpClient client = new DefaultHttpClient();

            HttpResponse resp = client.execute(uri);
            StatusLine status = resp.getStatusLine();
            if( status.getStatusCode() == 200 ) {
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                        resp.getEntity().writeTo(out);
                        out.close();
                        return out.toString();
            } else {
                throw new IllegalArgumentException("Status code was not 200");
            }
        }
        catch (Exception e) {
            mGetFailed = true;
            return e.getMessage();
        }
    }

    @Override
    protected void onPostExecute(String response) {
        if(mGetFailed) {
            mListener.httpGetFailed(response);
        } else {
            mListener.httpGetCompleted(response);
        }
    }
}

//-----------------------------------------------------------------//
// Exaple how to use that
public class MainActivity extends Activity implements OnHttpGetListener {

    public static final String TAG = "myApp";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getJSON();
    }

    private void getJSON() {
        HttpGetTask jsonGetter = new HttpGetTask(this); // Registers MainActivity to listen callbacks
        final String jsonUrl = // url to json
        jsonGetter.execute(jsonUrl); // Starts the async task
    }

    // Callbacks from the async task
    @Override
    public void httpGetCompleted(String response) {
        // This gets called when the background task
        // to get json is completed without errors
        Toast.makeText(this, "Response: " + response, Toast.LENGTH_SHORT).show();
        Log.d(TAG, response); // printing to debug
    }

    @Override
    public void httpGetFailed(String error) {
        // This gets called when the background task failes to get json
        Toast.makeText(this, "Http get failed!", Toast.LENGTH_SHORT).show();
        Log.e(TAG, error); // printing to error
    }
}