You can make a feature layer respond to userclickevents to get the place
ID and feature type for the boundary that was clicked. The
following example map shows the boundaries for the Country layer, and
shows an event handler that styles the clicked polygon associated with the
selected country.
Write a click event handler
When a click event occurs on a feature layer, the Maps SDK for Android passes aFeatureClickEventobject to the event handler. Use theFeatureClickEventto get the latitude
and longitude coordinates of the click and a list of features affected by the
click.
Handle feature layer events
Take the following steps to handle events on a feature layer. In this example,
you define a click event handler for the Country feature layer to apply a red
fill to the polygon representing the selected country.
When you callFeatureLayer.setFeatureStyle(),
the style factory function sets the style on all features in the
feature layer. To update the style of a feature in the event handler, you must
callFeatureLayer.setFeatureStyle()to set the updated style on all
features.
If you haven't already done so, follow the steps inGet Startedto create a new map ID and map style. Be sure to enable theCountryfeature layer.
privateFeatureLayercountryLayer; @OverridepublicvoidonMapReady(GoogleMapmap){ // Get the COUNTRY feature layer.countryLayer=map.getFeatureLayer(newFeatureLayerOptions.Builder().featureType(FeatureType.COUNTRY).build()); // Register the click event handler for the Country layer.countryLayer.addOnFeatureClickListener(this); // Apply default style to all countries on load to enable clicking.styleCountryLayer();} // Set default fill and border for all countries to ensure that they respond// to click events.privatevoidstyleCountryLayer(){FeatureLayer.StyleFactorystyleFactory=(Featurefeature)->{returnnewFeatureStyle.Builder()// Set the fill color for the country as white with a 10% opacity..fillColor(Color.argb(0.1,0,0,0))// Set border color to solid black..strokeColor(Color.BLACK).build();}; // Apply the style factory function to the country feature layer.countryLayer.setFeatureStyle(styleFactory);}
Kotlin
privatevarcountryLayer:FeatureLayer?=null overridefunonMapReady(googleMap:GoogleMap){// Get the COUNTRY feature layer.countryLayer=googleMap.getFeatureLayer(FeatureLayerOptions.Builder().featureType(FeatureType.COUNTRY).build()) // Register the click event handler for the Country layer.countryLayer?.addOnFeatureClickListener(this) // Apply default style to all countries on load to enable clicking.styleCountryLayer()} // Set default fill and border for all countries to ensure that they respond// to click events.privatefunstyleCountryLayer(){valstyleFactory=FeatureLayer.StyleFactory{feature:Feature->return@StyleFactoryFeatureStyle.Builder()// Set the fill color for the country as white with a 10% opacity..fillColor(Color.argb(0.1f,0f,0f,0f))// Set border color to solid black..strokeColor(Color.BLACK).build()} // Apply the style factory function to the country feature layer.countryLayer?.setFeatureStyle(styleFactory)}
Apply a fill color of red to the selected country. Only visible features are
clickable.
Java
@Override// Define the click event handler.publicvoidonFeatureClick(FeatureClickEventevent){ // Get the list of features affected by the click using// getPlaceIds() defined below.List<String>selectedPlaceIds=getPlaceIds(event.getFeatures()); if(!selectedPlaceIds.isEmpty()){FeatureLayer.StyleFactorystyleFactory=(Featurefeature)->{// Use PlaceFeature to get the placeID of the country.if(featureinstanceofPlaceFeature){if(selectedPlaceIds.contains(((PlaceFeature)feature).getPlaceId())){returnnewFeatureStyle.Builder()// Set the fill color to red..fillColor(Color.RED).build();}}returnnull;}; // Apply the style factory function to the feature layer.countryLayer.setFeatureStyle(styleFactory);}} // Get a List of place IDs from the FeatureClickEvent object.privateList<String>getPlaceIds(List<Feature>features){List<String>placeIds=newArrayList<>();for(Featurefeature:features){if(featureinstanceofPlaceFeature){placeIds.add(((PlaceFeature)feature).getPlaceId());}}returnplaceIds;}
Kotlin
// Define the click event handler.overridefunonFeatureClick(event:FeatureClickEvent){ // Get the list of features affected by the click using// getPlaceIds() defined below.valselectedPlaceIds=getPlaceIds(event.getFeatures())if(!selectedPlaceIds.isEmpty()){valstyleFactory=FeatureLayer.StyleFactory{feature:Feature->// Use PlaceFeature to get the placeID of the country.if(featureisPlaceFeature){if(selectedPlaceIds.contains((featureasPlaceFeature).getPlaceId())){return@StyleFactoryFeatureStyle.Builder()// Set the fill color to red..fillColor(Color.RED).build()}}return@StyleFactorynull} // Apply the style factory function to the feature layer.countryLayer?.setFeatureStyle(styleFactory)}} // Get a List of place IDs from the FeatureClickEvent object.privatefungetPlaceIds(features:List<Feature>):List<String>{valplaceIds:MutableList<String>=ArrayList()for(featureinfeatures){if(featureisPlaceFeature){placeIds.add((featureasPlaceFeature).getPlaceId())}}returnplaceIds}
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eLearn how to make a feature layer respond to user click events, retrieving place ID and feature type.\u003c/p\u003e\n"],["\u003cp\u003eThis guide provides steps and code examples to create a click event handler for styling clicked boundaries.\u003c/p\u003e\n"],["\u003cp\u003eSee how to register an event handler for feature click events and apply custom styles to selected features.\u003c/p\u003e\n"],["\u003cp\u003eCode samples demonstrate retrieving the latitude/longitude of a click and a list of affected features.\u003c/p\u003e\n"],["\u003cp\u003eUnderstand how to implement a feature click event listener and style a clicked polygon with a red fill.\u003c/p\u003e\n"]]],[],null,["# Handle click events\n\nSelect platform: [Android](/maps/documentation/android-sdk/dds-boundaries/handle-events \"View this page for the Android platform docs.\") [iOS](/maps/documentation/ios-sdk/dds-boundaries/handle-events \"View this page for the iOS platform docs.\") [JavaScript](/maps/documentation/javascript/dds-boundaries/handle-events \"View this page for the JavaScript platform docs.\")\n\n\u003cbr /\u003e\n\nYou can make a feature layer respond to user `click` events to get the place\nID and feature type for the boundary that was clicked. The\nfollowing example map shows the boundaries for the Country layer, and\nshows an event handler that styles the clicked polygon associated with the\nselected country.\n\nWrite a click event handler\n---------------------------\n\nWhen a click event occurs on a feature layer, the Maps SDK for Android passes a\n[`FeatureClickEvent`](/android/reference/com/google/android/gms/maps/model/FeatureClickEvent)\nobject to the event handler. Use the `FeatureClickEvent` to get the latitude\nand longitude coordinates of the click and a list of features affected by the\nclick.\n\nHandle feature layer events\n---------------------------\n\nTake the following steps to handle events on a feature layer. In this example,\nyou define a click event handler for the Country feature layer to apply a red\nfill to the polygon representing the selected country.\n\nWhen you call\n[`FeatureLayer.setFeatureStyle()`](/android/reference/com/google/android/gms/maps/model/FeatureLayer#setFeatureStyle(com.google.android.gms.maps.model.FeatureLayer.StyleFactory)),\nthe style factory function sets the style on all features in the\nfeature layer. To update the style of a feature in the event handler, you must\ncall `FeatureLayer.setFeatureStyle()` to set the updated style on all\nfeatures.\n\n1. If you haven't already done so, follow the steps in\n [Get Started](/maps/documentation/android/dds-boundaries/start)\n to create a new map ID and map style. Be sure to enable the **Country**\n feature layer.\n\n2. Make sure your class implements\n [`FeatureLayer.OnFeatureClickListener`](/android/reference/com/google/android/gms/maps/model/FeatureLayer.OnFeatureClickListener).\n\n3. Register an event handler for feature click events by calling\n [`FeatureLayer.addOnFeatureClickListener()`](/android/reference/com/google/android/gms/maps/model/FeatureLayer#addOnFeatureClickListener(com.google.android.gms.maps.model.FeatureLayer.OnFeatureClickListener)).\n\n ### Java\n\n\n ```java\n private FeatureLayer countryLayer;\n\n @Override\n public void onMapReady(GoogleMap map) {\n\n // Get the COUNTRY feature layer.\n countryLayer = map.getFeatureLayer(new FeatureLayerOptions.Builder()\n .featureType(FeatureType.COUNTRY)\n .build());\n\n // Register the click event handler for the Country layer.\n countryLayer.addOnFeatureClickListener(this);\n\n // Apply default style to all countries on load to enable clicking.\n styleCountryLayer();\n }\n\n // Set default fill and border for all countries to ensure that they respond\n // to click events.\n private void styleCountryLayer() {\n FeatureLayer.StyleFactory styleFactory = (Feature feature) -\u003e {\n return new FeatureStyle.Builder()\n // Set the fill color for the country as white with a 10% opacity.\n .fillColor(Color.argb(0.1, 0, 0, 0))\n // Set border color to solid black.\n .strokeColor(Color.BLACK)\n .build();\n };\n\n // Apply the style factory function to the country feature layer.\n countryLayer.setFeatureStyle(styleFactory);\n }\n ```\n\n \u003cbr /\u003e\n\n ### Kotlin\n\n\n ```java\n private var countryLayer: FeatureLayer? = null\n\n override fun onMapReady(googleMap: GoogleMap) {\n // Get the COUNTRY feature layer.\n countryLayer = googleMap.getFeatureLayer(FeatureLayerOptions.Builder()\n .featureType(FeatureType.COUNTRY)\n .build())\n\n // Register the click event handler for the Country layer.\n countryLayer?.addOnFeatureClickListener(this)\n\n // Apply default style to all countries on load to enable clicking.\n styleCountryLayer()\n }\n\n // Set default fill and border for all countries to ensure that they respond\n // to click events.\n private fun styleCountryLayer() {\n val styleFactory = FeatureLayer.StyleFactory { feature: Feature -\u003e\n return@StyleFactory FeatureStyle.Builder()\n // Set the fill color for the country as white with a 10% opacity.\n .fillColor(Color.argb(0.1f, 0f, 0f, 0f))\n // Set border color to solid black.\n .strokeColor(Color.BLACK)\n .build()\n }\n\n // Apply the style factory function to the country feature layer.\n countryLayer?.setFeatureStyle(styleFactory)\n }\n ```\n\n \u003cbr /\u003e\n\n4. Apply a fill color of red to the selected country. Only visible features are\n clickable.\n\n ### Java\n\n\n ```java\n @Override\n // Define the click event handler.\n public void onFeatureClick(FeatureClickEvent event) {\n\n // Get the list of features affected by the click using\n // getPlaceIds() defined below.\n List\u003cString\u003e selectedPlaceIds = getPlaceIds(event.getFeatures());\n\n if (!selectedPlaceIds.isEmpty()) {\n FeatureLayer.StyleFactory styleFactory = (Feature feature) -\u003e {\n // Use PlaceFeature to get the placeID of the country.\n if (feature instanceof PlaceFeature) {\n if (selectedPlaceIds.contains(((PlaceFeature) feature).getPlaceId())) {\n return new FeatureStyle.Builder()\n // Set the fill color to red.\n .fillColor(Color.RED)\n .build();\n }\n }\n return null;\n };\n\n // Apply the style factory function to the feature layer.\n countryLayer.setFeatureStyle(styleFactory);\n }\n }\n\n // Get a List of place IDs from the FeatureClickEvent object.\n private List\u003cString\u003e getPlaceIds(List\u003cFeature\u003e features) {\n List\u003cString\u003e placeIds = new ArrayList\u003c\u003e();\n for (Feature feature : features) {\n if (feature instanceof PlaceFeature) {\n placeIds.add(((PlaceFeature) feature).getPlaceId());\n }\n }\n return placeIds;\n }\n ```\n\n \u003cbr /\u003e\n\n ### Kotlin\n\n\n ```java\n // Define the click event handler.\n override fun onFeatureClick(event: FeatureClickEvent) {\n\n // Get the list of features affected by the click using\n // getPlaceIds() defined below.\n val selectedPlaceIds = getPlaceIds(event.getFeatures())\n if (!selectedPlaceIds.isEmpty()) {\n val styleFactory = FeatureLayer.StyleFactory { feature: Feature -\u003e\n // Use PlaceFeature to get the placeID of the country.\n if (feature is PlaceFeature) {\n if (selectedPlaceIds.contains((feature as PlaceFeature).getPlaceId())) {\n return@StyleFactory FeatureStyle.Builder()\n // Set the fill color to red.\n .fillColor(Color.RED)\n .build()\n }\n }\n return@StyleFactory null\n }\n\n // Apply the style factory function to the feature layer.\n countryLayer?.setFeatureStyle(styleFactory)\n }\n }\n\n // Get a List of place IDs from the FeatureClickEvent object.\n private fun getPlaceIds(features: List\u003cFeature\u003e): List\u003cString\u003e {\n val placeIds: MutableList\u003cString\u003e = ArrayList()\n for (feature in features) {\n if (feature is PlaceFeature) {\n placeIds.add((feature as PlaceFeature).getPlaceId())\n }\n }\n return placeIds\n }\n ```\n\n \u003cbr /\u003e"]]
