My Android API journey

Add a marker in Taipei

val taipei = LatLng(25.105497, 121.597366)
mMap.addMarker(
    MarkerOptions()
      .position(taipei)
      .title("Where do you want to go?")
      .icon(BitmapDescriptorFactory.fromResource(R.drawable.SampleImage))
)

Query location manager for the user's 'last known location', then store the data as variables. Use retrieved data to move view to the 'last known location'.

    val locationManager = getSystemService(LOCATION_SERVICE) as LocationManager
    val criteria = Criteria()
    val provider = locationManager.getBestProvider(criteria, true)
    val location: Location? = 
        try { locationManager.getLastKnownLocation(provider!!) } 
        catch (e: NullPointerException) { null }

    if (location != null) {
        val latitude = location.latitude
        val longitude = location.longitude
        val coordinate = LatLng(latitude, longitude)
        val yourLocation = CameraUpdateFactory.newLatLngZoom(coordinate, 19f)
        mMap.animateCamera(yourLocation)
    }

To ensure that the zoom animation triggers on load, place this code after you've added markers, or just ensure that this is the last code inside the onMapReady block.