How to prevent Gson from converting a long number (a json string ) to scientific notation format?

Question

I need to convert json string to java object and display it as a long. The json string is a fixed array of long numbers:

{numbers [ 268627104, 485677888, 506884800 ] } 

The code to convert works fine in all cases except for numbers ending in 0. It converts those to a scientific notation number format:

   public static Object fromJson(HttpResponse response, Class<?> classOf)     throws IOException {     InputStream instream = response.getResponseInputStream();                         Object obj = null;     try {         Reader reader = new InputStreamReader(instream, HTTP.UTF_8);          Gson gson = new Gson();          obj = gson.fromJson(reader, classOf);           Logger.d(TAG, "json --> "+gson.toJson(obj));     } catch (UnsupportedEncodingException e) {         Logger.e(TAG, "unsupported encoding", e);     } catch (Exception e) {         Logger.e(TAG, "json parsing error", e);     }      return obj; } 

The actual result: Java object : 268627104, 485677888, 5.068848E+8

Notice the last number is converted to a scientific notation format. Can anyone suggest what could be done to work around it or prevent it or undo it? I'm using Gson v1.7.1

Answer 1

If serializing to a String is an option for you, you can configure GSON to do so with:

GsonBuilder gsonBuilder = new GsonBuilder(); gsonBuilder.setLongSerializationPolicy( LongSerializationPolicy.STRING ); Gson gson = gsonBuilder.create(); 

This will produce something like:

{numbers : [ "268627104", "485677888", "506884800" ] }