Set a max zoom level on LatLngBounds builder

Question

I haven\'t found an answer in my search, there are a few answers on SO but they didn\'t work for me.

I have 2 markers on the map and I am using LatLngBounds builder

Answer 1

Following from the answers by user2808624 and dvdrlee, I wrote an extension in Kotlin:

fun LatLngBounds.Builder.createBoundsWithZoomMaintained(bounds: LatLngBounds) : LatLngBounds  {
    val HEADING_NORTH_EAST = 45.0   //NorthEast angle
    val HEADING_SOUTH_WEST = 215.0  //SouthWest angle
    val center = bounds.center
    val northEast = SphericalUtil.computeOffset(center, 709.0, HEADING_NORTH_EAST)  //1000 metres on the diagonal translates to 709 metres on either side.
    val southWest = SphericalUtil.computeOffset(center, 709.0, HEADING_SOUTH_WEST)
    this.include(northEast).include(southWest)
    return this.build()
}

This would typically be in your Utils or Extensions file, and then you can use it from anywhere simply like this:

var bounds = builder.build()  //To include all your existing points.
bounds = builder.createBoundsWithZoomMaintained(bounds)  //Updated bounds.
mMap.animateCamera(CameraUpdateFactory.newLatLngBounds(bounds, 10))