fix: keep maps as single tab focus targets

maps-app/src/androidTest/java/com/google/maps/android/compose/GoogleMapFocusTraversalTests.kt

@@ -0,0 +1,76 @@
+/*
+ * 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.maps.android.compose
+
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.ui.input.key.Key
+import androidx.compose.ui.test.ExperimentalTestApi
+import androidx.compose.ui.test.assertIsFocused
+import androidx.compose.ui.test.junit4.createComposeRule
+import androidx.compose.ui.test.onAllNodesWithTag
+import androidx.compose.ui.test.performKeyInput
+import androidx.compose.ui.test.pressKey
+import androidx.compose.ui.test.requestFocus
+import com.google.android.gms.maps.model.LatLng
+import org.junit.Rule
+import org.junit.Test
+
+class GoogleMapFocusTraversalTests {
+    @get:Rule
+    val composeTestRule = createComposeRule()
+
+    private val mapItems = listOf(
+        MapListItem(id = "1", location = LatLng(1.23, 4.56), zoom = 10f, title = "Item 1"),
+        MapListItem(id = "2", location = LatLng(7.89, 0.12), zoom = 12f, title = "Item 2"),
+        MapListItem(id = "3", location = LatLng(3.45, 6.78), zoom = 11f, title = "Item 3"),
+    )
+
+    private fun initMaps() {
+        check(hasValidApiKey) { "Maps API key not specified" }
+
+        composeTestRule.setContent {
+            MapsInLazyColumn(
+                mapItems,
+                lazyListState = rememberLazyListState(),
+                onMapLoaded = {},
+            )
+        }
+
+        composeTestRule.waitUntil(timeoutMillis = 5_000) {
+            composeTestRule
+                .onAllNodesWithTag("Map", useUnmergedTree = true)
+                .fetchSemanticsNodes()
+                .size >= 2
+        }
+    }
+
+    @OptIn(ExperimentalTestApi::class)
+    @Test
+    fun tabFromMapFocusesNextMap() {
+        initMaps()
+
+        val visibleMaps = composeTestRule.onAllNodesWithTag("Map", useUnmergedTree = true)
+        visibleMaps[0].requestFocus()
+        visibleMaps[0].assertIsFocused()
+
+        visibleMaps[0].performKeyInput {
+            pressKey(Key.Tab)
+        }
+
+        visibleMaps[1].assertIsFocused()
+    }
+}

maps-compose/src/main/java/com/google/maps/android/compose/GoogleMap.kt

@@ -21,6 +21,7 @@ import android.content.res.Configuration
 import android.location.Location
 import android.os.Bundle
 import android.view.View
+import android.view.ViewGroup
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.runtime.Composable
@@ -155,6 +156,9 @@ public fun GoogleMap(
                 val options = googleMapOptionsFactory()
                 cameraPositionState.isLiteMode = options.liteMode == true
                 mapViewFactory(context, options).also { mapView ->
+                    mapView.isFocusable = true
+                    mapView.descendantFocusability = ViewGroup.FOCUS_BEFORE_DESCENDANTS
+
                     val componentCallbacks = object : ComponentCallbacks2 {
                         override fun onConfigurationChanged(newConfig: Configuration) {}