Expo Docs MCP Server

--- title: Maps description: A library that provides access to Google Maps on Android and Apple Maps on iOS. sourceCodeUrl: https://github.com/expo/expo/tree/main/packages/expo-maps packageName: expo-maps platforms: ["ios", "android"] iconUrl: /static/images/packages/expo-maps.png isAlpha: true hasVideoLink: true --- > **important** **This library is currently in alpha and will frequently experience breaking changes.** It is not available in the Expo Go app &ndash; use [development builds](/develop/development-builds/introduction/) to try it out. ## Installation <br /> ## Configuration Expo Maps provides access to the platform native map APIs on Android and iOS. - **Apple Maps (available on only)**. No additional configuration is required to use it after installing this package. - **Google Maps (available on only)**. While Google provides a Google Maps SDK for iOS, Expo Maps supports it exclusively on Android. If you want to use Google Maps on iOS, you can look into using an [alternative library](https://reactnative.directory/) or [writing your own](/modules/overview/). ### Google Cloud API setup **Before you can use Google Maps on Android**, you need to register a Google Cloud API project, enable the Maps SDK for Android, and add the associated configuration to your Expo project. > If you have already registered a project for another Google service on Android, such as Google Sign In, you enable the **Maps SDK for Android** on your project and jump to step 4. <Step label="1"> **Register a Google Cloud API project and enable the Maps SDK for Android** - Open your browser to the [Google API Manager](https://console.developers.google.com/apis) and create a project. - Once it's created, go to the project and enable the **Maps SDK for Android**. </Step> <Step label="2"> **Copy your app's SHA-1 certificate fingerprint** <Tabs> <Tab label="For Google Play Store"> - **If you are deploying your app to the Google Play Store**, you'll need to [upload your app binary to Google Play console](/submit/android/) at least once. This is required for Google to generate your app signing credentials. - Go to the **[Google Play Console](https://play.google.com/console) > (your app) > Release > Setup > App integrity > App Signing**. - Copy the value of **SHA-1 certificate fingerprint**. </Tab> <Tab label="For development builds"> - If you have already created a [development build](/develop/development-builds/introduction/), your project will be signed using a debug keystore. - After the build is complete, go to your [project's dashboard](https://expo.dev/accounts/[username]/projects/[project-name]), then, under **Configure** > click **Credentials**. - Under **Application Identifiers**, click your project's package name and under **Android Keystore** copy the value of **SHA-1 Certificate Fingerprint**. </Tab> </Tabs> </Step> <Step label="3"> **Create an API key** - Go to [Google Cloud Credential manager](https://console.cloud.google.com/apis/credentials) and click **Create Credentials**, then **API Key**. - In the modal, click **Edit API key**. - Under **Key restrictions** > **Application restrictions**, choose **Android apps**. - Under **Restrict usage to your Android apps**, click **Add an item**. - Add your `android.package` from **app.json** (for example: `com.company.myapp`) to the package name field. - Then, add the **SHA-1 certificate fingerprint's** value from step 2. - Click **Done** and then click **Save**. </Step> <Step label="4"> **Add the API key to your project** - Copy your **API Key** into your **app.json** under the `android.config.googleMaps.apiKey` field. - Create a new development build, and you can now use the Google Maps API on Android with `expo-maps`. </Step> ## Permissions To display the user's location on the map, you need to declare and request location permission beforehand. You can configure this using the built-in [config plugin](/config-plugins/introduction/) if you use config plugins in your project ([EAS Build](/build/introduction) or `npx expo run:[android|ios]`). The plugin allows you to configure various properties that cannot be set at runtime and require building a new app binary to take effect. ```json app.json { "expo": { "plugins": [ [ "expo-maps", { "requestLocationPermission": true, "locationPermission": "Allow $(PRODUCT_NAME) to use your location" } ] ] } } ``` ## Usage ```tsx if (Platform.OS === 'ios') { return ; } else if (Platform.OS === 'android') { return ; } else { return Maps are only available on Android and iOS; } } ``` ## API ```js // ApplesMaps.View and GoogleMaps.View are the React components ``` ## Permissions ### Android To show the user's location on the map, the `expo-maps` library requires the following permissions: - `ACCESS_COARSE_LOCATION`: for approximate device location - `ACCESS_FINE_LOCATION`: for precise device location ### iOS The following usage description keys are used by this library: