// Serialize a single object.

    public static String serializeToJson(Bitmap bmp) {

        Gson gson = new Gson();

        return gson.toJson(bmp);

    }

​

    // Deserialize to single object.

    public static Bitmap deserializeFromJson(String jsonString) {

        Gson gson = new Gson();

        return gson.fromJson(jsonString, Bitmap.class);

    }