用Google的API有JSONException生成解决思路

private String doTranslate(String original, String from,
            String to){
        String result = translate.getResources().getString(
                R.string.translation_error);
        HttpURLConnection con = null;
        Log.d(TAG, "doTranslate(" + original + ", " + from + ", "
                + to + ")");
        
        try{
            // Check if task has been interrupted
            if(Thread.interrupted())
                throw new InterruptedException();
            
            // Build RESTful query for Google API
            String q = URLEncoder.encode(original, "UTF-8");
            URL url = new URL(
                    "http://ajax.googleapis.com/ajax/services/language/translate"
                    + "?v=1.0" + "&q=" + q + "&langpair=" + from
                    + "%7C" + to);
            con = (HttpURLConnection)url.openConnection();
            con.setReadTimeout(10000 /* milliseconds */);
            con.setConnectTimeout(15000 /* milliseconds */);
            con.setRequestMethod("GET");
            con.addRequestProperty("Referer", 
                    "http://www.pragprog.com/titles/eband3/hello-android");
            con.setDoInput(true);
            
            // Start the query
            con.connect();
            
            // Check if task has been interrupted
            if(Thread.interrupted())
                throw new InterruptedException();
            
            // Read results from the query
            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(con.getInputStream(), "UTF-8"));
            String payload = reader.readLine();
            reader.close();
            
            // Parse to get translated text
            JSONObject jsonObject = new JSONObject(payload);
            result = jsonObject.getJSONObject("responseData")
                    .getString("translatedText")
                    .replace("&#39", ".")
                    .replace("&amp", "&");
            
            // Check if task has been interrupted
            if(Thread.interrupted())
                throw new InterruptedException();
        }catch(IOException e){
            Log.e(TAG, "IOException", e);
        }
        catch(JSONException e){
            Log.e(TAG, "JSONException", e);
        }
        catch(InterruptedException e){
            Log.d(TAG, "InterruptedException", e);
            result = translate.getResources().getString(
                    R.string.translation_interrupted);
        }
        finally{
            if(con != null){
                con.disconnect();
            }
        }
        
        // All done
        Log.d(TAG, "   -> returned " + result);
        return result;
    }