Android: Load JSON from `src/main/assets/`

LoadJSONFromAssests.kt

/* Android: Load JSON from `src/main/assets/` */

/* Extension function where `Context` passed explicitly */
fun loadJSONFromAsset(context: Context, fileName: String): String {
    val inputStream: InputStream = context.assets.open(fileName)
    val size: Int = inputStream.available()
    val buffer = ByteArray(size)
    inputStream.read(buffer)
    inputStream.close()
    return String(buffer, Charset.defaultCharset())
}

/* Extension function of `Context` class */
fun Context.loadJSONFromAsset(fileName: String): String {
    val inputStream: InputStream = this.assets.open(fileName)
    val size: Int = inputStream.available()
    val buffer = ByteArray(size)
    inputStream.read(buffer)
    inputStream.close()
    return String(buffer, Charset.defaultCharset())
}

/* Usages */

loadJSONFromAsset(context,"mock_response.json")

/* Alternative */
context.assets.open(fileName).bufferedReader().use(JsonParser::parseReader).asJsonObject.toString()