bitmap height and width change in kotlin

Question

I have a custom made .bmp file and I am drawing it on googlemaps with the addMarker call. Now I want to change the size depending on the zoomlevel from the google maps. It actually changes the size as it should, but the result is far from ok. It destroys my whole bitmap from the looks of it and I don't know what I can do to have the copy look exactly the same but smaller/bigger. I divide there by 13 because thats my starting zoomlevel for the normal .bmp Here is my code:

 var Bitmap_copy = original_Bitmap.copy(original_Bitmap.config,true)                       // kopiert elipse, da es sonst nicht in canvas gewandelt werden kann
        Bitmap_copy.height=mMap.cameraPosition.zoom.toInt()*Bitmap_copy.height/13
        Bitmap_copy.width=Bitmap_copy.width*mMap.cameraPosition.zoom.toInt()/13

        var canvas = Canvas(Bitmap_copy);                                                                   //Benötigt um Text auf Elipse zu schreiben
        var paint = Paint()                                                                                 //Grafikdaten des Textes
mMap.addMarker(MarkerOptions().position(LatLng(breitengrade_live[k], langengrade_live[k])).title(Busname).icon(BitmapDescriptorFactory.fromBitmap(Bitmap_copy)))

I think you need to scale it using `Bitmap.createScaledBitmap` — Strelok, Aug 22 '18 at 11:38
If this simple method is not sufficient, you can look into a better scaling method here: https://stackoverflow.com/a/39247574/2788 — Strelok, Aug 22 '18 at 11:41

bitmap height and width change in kotlin

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