Scaling custom marker icon via BitmapDescriptor ImageConfiguration argument doesn't seem to work for android

[fbazbo]

This code works fine for IOS and the icon gets scaled to a size I'm happy with for my marker assets (png at 177x240px):

Future<BitmapDescriptor> getAssetImage(String path, BuildContext context) {
      double dpr = MediaQuery.of(context).devicePixelRatio;
      ImageConfiguration config = ImageConfiguration(devicePixelRatio: dpr*2.0,);
      return BitmapDescriptor.fromAssetImage(config, path);
}

For Android, no matter what I pass for the devicePixelRatio, I always get the same size marker icon.

Note, that this might be a bug in the google map implementation since there seem to be similar issues - flutter/flutter#24865

Also, there are some alternative suggestions to size a marker via stackoverflow, but your version of BitmapDescriptor does not implement the fromBytes static method.

[LuisThein]

Hey, actually I just discovered that I implemented the icon scaling wrong in apple_maps_flutter. The way it should work is by specifying icon assets for different scales like so:

.../my_icon.png
.../2.0x/my_icon.png
.../3.0x/my_icon.png

See: https://flutter.dev/docs/development/ui/assets-and-images#declaring-resolution-aware-image-assets

This way you can specify your icon size through the devicePixelRatio.
I'm almost finished fixing this and also adding the ability to add custom Icons through the BitmapDescriptor.fromBytes method, which will give you additional options to scale your icons as needed.