LocalJSONParserExtension

LocalJSONParserExtension.txt

1. Create this BaseLocalJsonParser Compenion object

object BaseLocalJsonParser {
    fun parseJSONData(context: Context, jsonFileName: String): String? {
        val JSONString: String?
        JSONString = try {
            val inputStream: InputStream = context.assets.open(jsonFileName)
            val sizeOfJSONFile: Int = inputStream.available()
            val bytes = ByteArray(sizeOfJSONFile)
            inputStream.read(bytes)
            inputStream.close()
            String(bytes, UTF_8)
        } catch (ex: IOException) {
            ex.printStackTrace()
            return null
        }
        return JSONString
    }
}

2. load json file from asset & set data to model with GSON

   val gson = Gson()
   var model: YourModelClass = gson.fromJson(BaseLocalJsonParser.parseJSONData(requireContext(), "filepathassetfolder/yourfile.json"), YourModelClass::class.java)
   
Enjoy  :)