Atlas Device SDK for Java
On this page
- SDK in Maintenance Mode
- Develop Apps with the SDK
- Install the Java SDK
- Define an Object Schema
- Open a Database
- Read and Write Data
- React to Changes
- Connect to an Atlas App Services App
- Authenticate a User
- Open a Synced Database
- Read and Write Synced Data
- Call Serverless Functions
- Query MongoDB Atlas
- Authenticate Users
- Recommended Reading
Use the Atlas Device SDK for Java to develop Android apps in Java or Kotlin. To develop multiplatform apps using Kotlin Multiplatform (KMP), refer to the Kotlin SDK.
SDK in Maintenance Mode
This SDK is in best-effort maintenance mode and no longer receives new development or non-critical bug fixes. To develop your app with new features, use the Kotlin SDK. You can use the Java SDK with the Kotlin SDK.
Learn more about how to Migrate from the Java SDK to the Kotlin SDK.
Develop Apps with the SDK
Use the SDK's open-source database - Realm - as an object store on the device. Use Device Sync to keep data in sync with your MongoDB Atlas cluster and other clients.
Install the Java SDK
Use the Gradle build system to install the Java SDK in your project.
Define an Object Schema
Use Java or Kotlin to idiomatically define an object schema.
Open a Database
The SDK's database - Realm - stores objects in files on your device. Or you can open an in-memory database which does not create a file. To get started reading and writing data, configure and open a database.
Read and Write Data
Create, read, update, and delete objects from the database. Use Android-native queries to filter data.
React to Changes
Live objects mean that your data is always up-to-date. You can register a notification handler to watch for changes and perform some logic, such as updating your UI.

Recommended Reading



Kotlin Extensions API Reference
Explore generated reference docs for the Kotlin Extensions APIs.