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Showing content from https://developers.google.com/maps/documentation/android-sdk/secrets-gradle-plugin below:

Secrets Gradle plugin | Maps SDK for Android

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Google strongly recommends that you not check an API key into your version control system. Instead, you should store it in a local secrets.properties file, which is located in the root directory of your project but excluded from version control, and then use the Secrets Gradle Plugin for Android to read the API key.

The Secrets Gradle Plugin for Android reads secrets, including the API key, from a properties file not checked into a version control system. The plugin then exposes those properties as variables in the Gradle-generated BuildConfig class and in the Android manifest file.

For a complete example of using the Secrets Gradle Plugin for Android to access an API key, see Set up an Android Studio project.

To install the Secrets Gradle Plugin for Android in your Google Maps project:

1. In Android Studio, open your top-level build.gradle.kts or build.gradle file and add the following code to the dependencies element under buildscript. Kotlin

   buildscript {
       dependencies {
           classpath("com.google.android.libraries.mapsplatform.secrets-gradle-plugin:secrets-gradle-plugin:2.0.1")
       }
   }

   Groovy

   buildscript {
       dependencies {
           classpath "com.google.android.libraries.mapsplatform.secrets-gradle-plugin:secrets-gradle-plugin:2.0.1"
       }
   }

2. Open your module-level build.gradle.kts or build.gradle file and add the following code to the plugins element. Kotlin

   plugins {
       // ...
       id("com.google.android.libraries.mapsplatform.secrets-gradle-plugin")
   }

   Groovy

   plugins {
       // ...
       id 'com.google.android.libraries.mapsplatform.secrets-gradle-plugin'
   }

3. In your module-level build.gradle.kts or build.gradle file, ensure that targetSdk and compileSdk are set to 34.
4. Sync your project with Gradle.
5. Open the secrets.properties file in your top-level directory, and then add the following code. Replace YOUR_API_KEY with your API key. Store your key in this file because secrets.properties is excluded from being checked into a version control system. Note: If the secrets.properties file does not exist, create it in the same folder as the local.properties file.

   MAPS_API_KEY=YOUR_API_KEY

6. Create the local.defaults.properties file in your top-level directory, the same folder as the secrets.properties file, and then add the following code.

   Note: Enter the code as shown. Don't replace DEFAULT_API_KEY with your API key.

   MAPS_API_KEY=DEFAULT_API_KEY

   The purpose of this file is to provide a backup location for the API key if the secrets.properties file is not found so that builds don't fail. This can happen if you clone the app from a version control system which omits secrets.properties and you have not yet created a secrets.properties file locally to provide your API key.

7. In your AndroidManifest.xml file, go to com.google.android.geo.API_KEY and update the android:value attribute. If the <meta-data> tag does not exist, create it as a child of the <application> tag.

   <meta-data
       android:name="com.google.android.geo.API_KEY"
       android:value="${MAPS_API_KEY}" />

   Note: com.google.android.geo.API_KEY is the recommended metadata name for the API key. A key with this name can be used to authenticate to multiple Google Maps-based APIs on the Android platform, including the Maps SDK for Android. For backwards compatibility, the API also supports the name com.google.android.maps.v2.API_KEY. This legacy name allows authentication to the Android Maps API v2 only. An application can specify only one of the API key metadata names. If both are specified, the API throws an exception.

8. In Android Studio, open your module-level build.gradle.kts or build.gradle file and edit the secrets property. If the secrets property does not exist, add it.

   Edit the properties of the plugin to set propertiesFileName to secrets.properties, set defaultPropertiesFileName to local.defaults.properties, and set any other properties.

   Kotlin

   secrets {
       // To add your Maps API key to this project:
       // 1. If the secrets.properties file does not exist, create it in the same folder as the local.properties file.
       // 2. Add this line, where YOUR_API_KEY is your API key:
       //        MAPS_API_KEY=YOUR_API_KEY
       propertiesFileName = "secrets.properties"
   
       // A properties file containing default secret values. This file can be
       // checked in version control.
       defaultPropertiesFileName = "local.defaults.properties"
   }
           

   Groovy

   secrets {
       // To add your Maps API key to this project:
       // 1. If the secrets.properties file does not exist, create it in the same folder as the local.properties file.
       // 2. Add this line, where YOUR_API_KEY is your API key:
       //        MAPS_API_KEY=YOUR_API_KEY
       propertiesFileName = "secrets.properties"
   
       // A properties file containing default secret values. This file can be
       // checked in version control.
       defaultPropertiesFileName = "local.defaults.properties"
   }
           

• View the Secrets Gradle Plugin for Android GitHub project page.
• View Set up an Android Studio project for a complete example of using the plugin.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-14 UTC.

[[["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 2025-08-14 UTC."],[[["Securely manage your Google Maps API key using the Secrets Gradle Plugin for Android, avoiding storage in version control."],["The plugin reads your API key from a local `secrets.properties` file and makes it accessible in your `BuildConfig` and manifest."],["Install the plugin by adding it as a dependency and applying it in your Gradle files, then configure it to locate your API key."],["Utilize the `local.defaults.properties` file to provide a fallback API key for builds and prevent failures when the `secrets.properties` file is missing."],["Refer to the plugin's GitHub page and the setup guide for detailed information and a comprehensive example."]]],[]]

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