The following code sample demonstrates how to add a 3D polygon and position
it in 3D space by calling the addPolygon
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 and define variables import com.google.android.gms.maps3d.model.LatLngAltitude import com.google.android.gms.maps3d.model.polygonOptions val zooOutline = """ 39.7508987, -104.9565381 39.7502883, -104.9565489 39.7501976, -104.9563557 39.7501481, -104.955594 39.7499171, -104.9553043 39.7495872, -104.9551648 39.7492407, -104.954961 39.7489685, -104.9548859 39.7484488, -104.9548966 39.7481189, -104.9548859 39.7479539, -104.9547679 39.7479209, -104.9544567 39.7476487, -104.9535341 39.7475085, -104.9525792 39.7474095, -104.9519247 39.747525, -104.9513776 39.7476734, -104.9511844 39.7478137, -104.9506265 39.7477559, -104.9496395 39.7477477, -104.9486203 39.7478467, -104.9475796 39.7482344, -104.9465818 39.7486138, -104.9457878 39.7491005, -104.9454874 39.7495789, -104.945938 39.7500491, -104.9466998 39.7503213, -104.9474615 39.7505358, -104.9486954 39.7505111, -104.950648 39.7511215, -104.9506587 39.7511173, -104.9527187 39.7511091, -104.9546445 39.7508987, -104.9565381""" . trimIndent () . split ( "\n" ) . map { line - > line . split ( "," ). map { it . trim (). toDouble () } } . map { coords - > latLngAltitude { latitude = coords [ 0 ] longitude = coords [ 1 ] altitude = 0.0 } } val zooPolygonOptions = polygonOptions { outerCoordinates = zooOutline fillColor = Color . argb ( 70 , 255 , 255 , 0 ) strokeColor = Color . GREEN strokeWidth = 3.0 altitudeMode = AltitudeMode . CLAMP_TO_GROUND } val zooPolygon = googleMap3D . addPolygon ( zooPolygonOptions ) ... // Add to the onMap3DViewReady method, after the googleMap3D object has been initialized googleMap3D . setCamera ( camera { center = latLngAltitude { latitude = 39.748477 longitude = - 104.947575 altitude = 1610.0 } heading = 290.0 tilt = 47.0 range = 2251.0 } )
Listen for polygon click events
To listen for click events on a polygon, call setClickListener
on
the polygon object. The following example shows how to set a click listener on
a polygon:
polygon . setClickListener { lifecycleScope . launch ( Dispatchers . Main ) { Toast . makeText ( this @PolygonsActivity , "Check out the Museum!" , 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)
.
