XML : Android icon screen

How to program in android auto scale with screen icon created in java.

  public static Bitmap createTextMarker (Context context, String text) {        final Resources res = context.getResources();       final int markerPadding = res.getDimensionPixelOffset(         // R.dimen.activity_maps_marker_padding);        final IconGenerator iconGenerator = new IconGenerator(context);      iconGenerator.setBackground(res.getDrawable(R.drawable.ic_marker_price));      iconGenerator.setTextAppearance(R.style.ParkingMarkerText);        //iconGenerator.setContentPadding(markerPadding,          //markerPadding + (markerPadding / 3),         // markerPadding, 0);        return iconGenerator.makeIcon(text);    }          }