Mapbox for Android, using Tiles from a server

Question

I am trying to figure out what is the best practice to use Mapbox on Android with tiles stored in a server.

I know the tiles are available because I can make them appear on the web. I can use the default styles no problem mapBox.setStyle(Style.LIGHT) but when I try to change the map style using the server tiles.

I'm creating a JsonObject:

val mapJSONObject = JsonObject()

which is the equivalent of this:

{
  "version": 8,
  "sources": {
    "tiles-name": {
    "type": "raster",
    "url": "https://myserver.com/map/c16c1u38213f0db8001b1c6e8cee5f7a/{z}/{x}/{y}?token=jfsdajfdsjkfjksh34232fsd",
    "tileSize": 256
    }
  },
  "layers": [{
    "id": "ee-raster",
    "type": "raster",
    "source": "tiles-name",
    "minzoom": 0,
    "maxzoom": 22
  }]
}

I've tried to use this JsonObject by either calling it by:

map.setStyle(Style.Builder().fromJson(mapJSONObject.toString()))

or by creating a .json file via this function:

@Throws(IOException::class)
fun save(context: Context, jsonString: String) {
    val rootFolder = context.getExternalFilesDir(null)
    val jsonFile = File(rootFolder, "file.json")
    val writer = FileWriter(jsonFile)
    writer.write(jsonString)
    writer.close()
}

then using that .json file via:

map.setStyle(Style.Builder().fromJson("file.json"))

When triggering the change map using:

map.setStyle(Style.Builder().fromJson(mapJSONObject.toString()))

I get the error message:

D/Mbgl-HttpRequest: [HTTP] Request with response = 404: No additional information [Style]: Failed to load source tiles-name: HTTP status code 404

When triggering the change map using:

map.setStyle(Style.Builder().fromJson("file.json"))

I get the error message:

[ParseStyle]: Failed to parse style: Invalid value. at offset 1

I have trouble debugging this, even though the error messages seem clear enough.

I have been reading through the MapBox documentation, but can't seem to find a clear example using tiles from tiles on a server.

Can anyone identify what might be the issue or point me to an example using this method?

Doesn't have to be in Kotlin, Java would be equally useful.