The following code sample
demonstrates how to add a polyline and position it in 3D space by calling the addPolyline
method. To use this code sample, follow the instructions in Setup
and Add a 3D map to your app
to set
up your Android Studio project with a basic 3D map. Then, add the following code to the MainActivity.kt
file:
// Add imports import com.google.android.gms.maps3d.model.latLngAltitude ... // Add to the onMap3DViewReady method, after the googleMap3D object has been initialized googleMap3D . setCamera ( camera { center = latLngAltitude { latitude = 40.029349 longitude = - 105.300354 altitude = 1833.9 } heading = 326.0 tilt = 75.0 range = 3757.0 } ) internal val trailLocations = """ 40.0201040, -105.2976640 40.0201080, -105.2976450 40.0201640, -105.2975120 40.0202200, -105.2973740 40.0202500, -105.2972760 40.0202960, -105.2971410 40.0203080, -105.2970990 40.0203320, -105.2970070 40.0203640, -105.2969400 40.0203710, -105.2969250 40.0203770, -105.2969220 40.0203910, -105.2969130 40.0203940, -105.2969120 40.0204200, -105.2969130 40.0204630, -105.2968910 40.0205270, -105.2968280 40.0206030, -105.2967570 40.0206590, -105.2966100 40.0206990, -105.2964870 """ . trimIndent (). split ( "\n" ). map { val ( lat , lng ) = it . split ( "," ) latLngAltitude { latitude = lat . toDouble () longitude = lng . toDouble () altitude = 0.0 // The trail will be clamped to the ground } } val trailPolylineOptions = polylineOptions { coordinates = trailLocations strokeColor = Color . RED strokeWidth = 7.0 altitudeMode = AltitudeMode . CLAMP_TO_GROUND zIndex = 5 drawsOccludedSegments = true } googleMap3D . addPolyline ( trailPolylineOptions )
Listen for polyline click events
To listen for click events on a polyline, call setClickListener
on
the polyline object. The following example shows how to set a click listener on
a polyline:
polyline . setClickListener { lifecycleScope . launch ( Dispatchers . Main ) { Toast . makeText ( this @PolylinesActivity , "Hiking time!" , Toast . LENGTH_SHORT ). show () } }
Note that the click handler does not run on the Main (or UI) thread. If you
want to make changes to the UI (such as showing a Toast message), you must
switch to the Main thread. For Kotlin, you can do this using lifecycleScope.launch(Dispatchers.Main)
.
