Implement Maps Grounding (#7983)

This reintroduces maps grounding for M180.

Not to be merged until after the M179 code freeze next week.

Author: emilypgoogle

ai-logic/firebase-ai/CHANGELOG.md

@@ -1,13 +1,21 @@
 # Unreleased
 
+- [feature] Added support for [Maps Grounding](https://ai.google.dev/gemini-api/docs/maps-grounding) (#7950)
+
 - [feature] Added the `turnComplete` argument to multiple `LiveSession.send()` methods.
+
 - [deprecated] All Imagen models are deprecated and will shut down as early as June 2026.
   As a replacement, you can [migrate your apps to use Gemini Image models (the "Nano Banana" models)](https://firebase.google.com/docs/ai-logic/imagen-models-migration).
+
 - [feature] Added support for Chat interactions using server prompt templates (#7986)
+
 - [feature] Added support for function calling in Chat interactions using server prompt templates (#8004)
+
 - [fixed] Fixed an issue causing network timeouts to throw the incorrect exception type, instead of
   `RequestTimeoutException` (#7966)
+
 - [fixed] Fixed missing `toString()` implementation for `InferenceSource` (#7970)
+
 - [fixed] Fixed an issue causing the SDK to throw an exception if an unknown message was received
   from the LiveAPI model, instead of ignoring it (#7975)
 

ai-logic/firebase-ai/api.txt

@@ -649,6 +649,20 @@ package com.google.firebase.ai.type {
     method public com.google.firebase.ai.type.GenerativeBackend vertexAI(String location = "us-central1");
   }
 
+  public final class GoogleMaps {
+    ctor public GoogleMaps();
+  }
+
+  public final class GoogleMapsGroundingChunk {
+    ctor public GoogleMapsGroundingChunk(String? uri, String? title, String? placeId);
+    method public String? getPlaceId();
+    method public String? getTitle();
+    method public String? getUri();
+    property public final String? placeId;
+    property public final String? title;
+    property public final String? uri;
+  }
+
   public final class GoogleSearch {
     ctor public GoogleSearch();
   }
@@ -662,8 +676,12 @@ package com.google.firebase.ai.type {
   }
 
   public final class GroundingChunk {
-    ctor public GroundingChunk(com.google.firebase.ai.type.WebGroundingChunk? web);
+    ctor public GroundingChunk();
+    ctor public GroundingChunk(com.google.firebase.ai.type.WebGroundingChunk? web = null);
+    ctor public GroundingChunk(com.google.firebase.ai.type.WebGroundingChunk? web = null, com.google.firebase.ai.type.GoogleMapsGroundingChunk? maps = null);
+    method public com.google.firebase.ai.type.GoogleMapsGroundingChunk? getMaps();
     method public com.google.firebase.ai.type.WebGroundingChunk? getWeb();
+    property public final com.google.firebase.ai.type.GoogleMapsGroundingChunk? maps;
     property public final com.google.firebase.ai.type.WebGroundingChunk? web;
   }
 
@@ -1179,6 +1197,17 @@ package com.google.firebase.ai.type {
     method public com.google.firebase.ai.type.JsonSchema<java.lang.String> string(String? description = null, boolean nullable = false, com.google.firebase.ai.type.StringFormat? format = null, String? title = null);
   }
 
+  public final class LatLng {
+    ctor public LatLng(double latitude, double longitude);
+    method public double component1();
+    method public double component2();
+    method public com.google.firebase.ai.type.LatLng copy(double latitude, double longitude);
+    method public double getLatitude();
+    method public double getLongitude();
+    property public final double latitude;
+    property public final double longitude;
+  }
+
   @com.google.firebase.ai.type.PublicPreviewAPI public final class LiveAudioConversationConfig {
     field public static final com.google.firebase.ai.type.LiveAudioConversationConfig.Companion Companion;
   }
@@ -1390,6 +1419,28 @@ package com.google.firebase.ai.type {
     property public final com.google.firebase.ai.type.GenerateContentResponse response;
   }
 
+  public final class RetrievalConfig {
+    method public static com.google.firebase.ai.type.RetrievalConfig.Builder builder();
+    field public static final com.google.firebase.ai.type.RetrievalConfig.Companion Companion;
+  }
+
+  public static final class RetrievalConfig.Builder {
+    ctor public RetrievalConfig.Builder();
+    method public com.google.firebase.ai.type.RetrievalConfig build();
+    method public com.google.firebase.ai.type.RetrievalConfig.Builder setLanguageCode(String? languageCode);
+    method public com.google.firebase.ai.type.RetrievalConfig.Builder setLatLng(com.google.firebase.ai.type.LatLng? latLng);
+    field public String? languageCode;
+    field public com.google.firebase.ai.type.LatLng? latLng;
+  }
+
+  public static final class RetrievalConfig.Companion {
+    method public com.google.firebase.ai.type.RetrievalConfig.Builder builder();
+  }
+
+  public final class RetrievalConfigKt {
+    method public static com.google.firebase.ai.type.RetrievalConfig retrievalConfig(kotlin.jvm.functions.Function1<? super com.google.firebase.ai.type.RetrievalConfig.Builder,kotlin.Unit> init);
+  }
+
   public final class SafetyRating {
     method public Boolean? getBlocked();
     method public com.google.firebase.ai.type.HarmCategory getCategory();
@@ -1671,6 +1722,8 @@ package com.google.firebase.ai.type {
     method public static com.google.firebase.ai.type.Tool codeExecution();
     method public static com.google.firebase.ai.type.Tool functionDeclarations(java.util.List<com.google.firebase.ai.type.FunctionDeclaration> functionDeclarations);
     method public static com.google.firebase.ai.type.Tool functionDeclarations(java.util.List<com.google.firebase.ai.type.FunctionDeclaration>? functionDeclarations = null, java.util.List<? extends com.google.firebase.ai.type.AutoFunctionDeclaration<? extends java.lang.Object?,? extends java.lang.Object?>>? autoFunctionDeclarations);
+    method public static com.google.firebase.ai.type.Tool googleMaps();
+    method public static com.google.firebase.ai.type.Tool googleMaps(com.google.firebase.ai.type.GoogleMaps googleMaps = com.google.firebase.ai.type.GoogleMaps());
     method public static com.google.firebase.ai.type.Tool googleSearch();
     method public static com.google.firebase.ai.type.Tool googleSearch(com.google.firebase.ai.type.GoogleSearch googleSearch = com.google.firebase.ai.type.GoogleSearch());
     method public static com.google.firebase.ai.type.Tool urlContext();
@@ -1682,14 +1735,18 @@ package com.google.firebase.ai.type {
     method public com.google.firebase.ai.type.Tool codeExecution();
     method public com.google.firebase.ai.type.Tool functionDeclarations(java.util.List<com.google.firebase.ai.type.FunctionDeclaration> functionDeclarations);
     method public com.google.firebase.ai.type.Tool functionDeclarations(java.util.List<com.google.firebase.ai.type.FunctionDeclaration>? functionDeclarations = null, java.util.List<? extends com.google.firebase.ai.type.AutoFunctionDeclaration<? extends java.lang.Object?,? extends java.lang.Object?>>? autoFunctionDeclarations);
+    method public com.google.firebase.ai.type.Tool googleMaps();
+    method public com.google.firebase.ai.type.Tool googleMaps(com.google.firebase.ai.type.GoogleMaps googleMaps = com.google.firebase.ai.type.GoogleMaps());
     method public com.google.firebase.ai.type.Tool googleSearch();
     method public com.google.firebase.ai.type.Tool googleSearch(com.google.firebase.ai.type.GoogleSearch googleSearch = com.google.firebase.ai.type.GoogleSearch());
     method public com.google.firebase.ai.type.Tool urlContext();
     method public com.google.firebase.ai.type.Tool urlContext(com.google.firebase.ai.type.UrlContext urlContext = com.google.firebase.ai.type.UrlContext());
   }
 
   public final class ToolConfig {
-    ctor public ToolConfig(com.google.firebase.ai.type.FunctionCallingConfig? functionCallingConfig);
+    ctor public ToolConfig();
+    ctor public ToolConfig(com.google.firebase.ai.type.FunctionCallingConfig? functionCallingConfig = null);
+    ctor public ToolConfig(com.google.firebase.ai.type.FunctionCallingConfig? functionCallingConfig = null, com.google.firebase.ai.type.RetrievalConfig? retrievalConfig = null);
   }
 
   public final class Transcription {

ai-logic/firebase-ai/src/androidTest/kotlin/com/google/firebase/ai/GroundingTests.kt

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.firebase.ai
+
+import com.google.firebase.ai.AIModels.Companion.app
+import com.google.firebase.ai.type.GenerativeBackend
+import com.google.firebase.ai.type.LatLng
+import com.google.firebase.ai.type.RetrievalConfig
+import com.google.firebase.ai.type.Tool
+import com.google.firebase.ai.type.ToolConfig
+import io.kotest.matchers.shouldBe
+import kotlinx.coroutines.runBlocking
+import org.junit.Test
+
+class GroundingTests {
+
+  @Test
+  fun groundingTests_canRecognizeAreas(): Unit = runBlocking {
+    val model = setupModel(config = ToolConfig())
+    val response = model.generateContent("Where is a good place to grab a coffee near Alameda, CA?")
+
+    response.candidates.isEmpty() shouldBe false
+    response.candidates[0].groundingMetadata?.groundingChunks?.any { it.maps != null } shouldBe true
+  }
+
+  @Test
+  fun groundingTests_canRecognizeLatLng(): Unit = runBlocking {
+    val model =
+      setupModel(
+        config =
+          ToolConfig(
+            retrievalConfig =
+              RetrievalConfig(
+                latLng = LatLng(latitude = 30.2672, longitude = -97.7431),
+                languageCode = "en_US",
+              ),
+          )
+      )
+    val response = model.generateContent("Find bookstores in my area.")
+
+    response.candidates.isEmpty() shouldBe false
+    response.candidates[0].groundingMetadata?.groundingChunks?.any { it.maps != null } shouldBe true
+  }
+
+  companion object {
+
+    @JvmStatic
+    fun setupModel(config: ToolConfig): GenerativeModel {
+      val model =
+        FirebaseAI.getInstance(app(), GenerativeBackend.vertexAI())
+          .generativeModel(
+            modelName = "gemini-2.5-flash",
+            toolConfig = config,
+            tools = listOf(Tool.googleMaps()),
+          )
+      return model
+    }
+  }
+}

ai-logic/firebase-ai/src/main/kotlin/com/google/firebase/ai/type/Candidate.kt

@@ -336,6 +336,12 @@ public class FinishReason private constructor(public val name: String, public va
  * Vertex AI Gemini API (see [Service Terms](https://cloud.google.com/terms/service-terms) section
  * within the Service Specific Terms).
  *
+ * If using Grounding with Google Maps, you are required to comply with the "Grounding with Google
+ * Maps" usage requirements for your chosen API provider:
+ * [Gemini Developer API](https://ai.google.dev/gemini-api/terms#grounding-with-google-maps) or
+ * Vertex AI Gemini API (see [Service Terms](https://cloud.google.com/terms/service-terms) section
+ * within the Service Specific Terms).
+ *
  * @property webSearchQueries The list of web search queries that the model performed to gather the
  * grounding information. These can be used to allow users to explore the search results themselves.
  * @property searchEntryPoint Google Search entry point for web searches. This contains an HTML/CSS
@@ -408,15 +414,40 @@ public class SearchEntryPoint(
  * Represents a chunk of retrieved data that supports a claim in the model's response.
  *
  * @property web Contains details if the grounding chunk is from a web source.
+ * @property maps Contains details if the grounding chunk is from a Google Maps source.
  */
-public class GroundingChunk(
-  public val web: WebGroundingChunk?,
+public class GroundingChunk
+@JvmOverloads
+constructor(
+  public val web: WebGroundingChunk? = null,
+  public val maps: GoogleMapsGroundingChunk? = null,
 ) {
+
   @Serializable
   internal data class Internal(
     val web: WebGroundingChunk.Internal?,
+    val maps: GoogleMapsGroundingChunk.Internal?,
   ) {
-    internal fun toPublic() = GroundingChunk(web = web?.toPublic())
+    internal fun toPublic() = GroundingChunk(web = web?.toPublic(), maps?.toPublic())
+  }
+}
+
+/**
+ * A grounding chunk from Google Maps.
+ *
+ * @property uri The URI of the place.
+ * @property title The title of the place.
+ * @property placeId This Place's resource name, in `places/{place_id}` format. This can be used to
+ * look up the place using the Google Maps API.
+ */
+public class GoogleMapsGroundingChunk(
+  public val uri: String?,
+  public val title: String?,
+  public val placeId: String?,
+) {
+  @Serializable
+  internal data class Internal(val uri: String?, val title: String?, val placeId: String?) {
+    fun toPublic() = GoogleMapsGroundingChunk(uri, title, placeId)
   }
 }
 

ai-logic/firebase-ai/src/main/kotlin/com/google/firebase/ai/type/GoogleMaps.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.firebase.ai.type
+
+import kotlinx.serialization.Serializable
+
+/**
+ * A tool that allows a Gemini model to connect to Google Maps to access and incorporate
+ * location-based information into its responses.
+ *
+ * Important: If using Grounding with Google Maps, you are required to comply with the "Grounding
+ * with Google Maps" usage requirements for your chosen API provider: {@link
+ * https://ai.google.dev/gemini-api/terms#grounding-with-google-maps | Gemini Developer API} or
+ * Vertex AI Gemini API (see {@link https://cloud.google.com/terms/service-terms | Service Terms}
+ * section within the Service Specific Terms).
+ */
+public class GoogleMaps {
+  @Serializable internal class Internal()
+
+  internal fun toInternal() = Internal()
+}

ai-logic/firebase-ai/src/main/kotlin/com/google/firebase/ai/type/LatLng.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.firebase.ai.type
+
+import kotlinx.serialization.Serializable
+
+/**
+ * An object that represents a latitude/longitude pair.
+ *
+ * @param latitude The latitude in degrees. It must be in the range [-90.0, +90.0].
+ * @param longitude The longitude in degrees. It must be in the range [-180.0, +180.0].
+ */
+public data class LatLng(val latitude: Double, val longitude: Double) {
+  @Serializable
+  internal data class Internal(val latitude: Double, val longitude: Double) {
+    fun toPublic() = LatLng(latitude, longitude)
+  }
+
+  internal fun toInternal() = Internal(latitude, longitude)
+}