add item . concode_field_sep List<Object> mArray concode_field_sep long getLong concode_elem_sep int getInt concode_elem_sep JSONObject getObject concode_elem_sep void addAll concode_elem_sep void addAll concode_elem_sep Object get concode_elem_sep int length concode_elem_sep double getDouble concode_elem_sep JSONArray getArray concode_elem_sep boolean getBoolean concode_elem_sep float getFloat concode_elem_sep String getString concode_elem_sep void writeJSON