MongoDB Realm Android SDK

The MongoDB Realm Android SDK enables client applications on the Android platform to access data stored in local realms and interact with MongoDB Realm services like Functions, MongoDB Data Access, and authentication. The Android SDK supports both Java and Kotlin Android applications.

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The Android SDK does not support Java or Kotlin applications written for environments other than Android.

To learn how to add the MongoDB Realm Android SDK library as a dependency to your Android application, see Install Realm for Android.

You can store a wide variety of data within realms stored on your device. With Realm Sync, you can share updates to that data across client devices and MongoDB Atlas.

For information about the structure of data you can store in realms, see Realms, Objects, and Relationships.

To learn about the results returned from realm queries, see Collections.

To gracefully update the schema to a new version at runtime, see Migrations.

Once you have defined a data model for your application, you need to be able to write and read pieces of data to and from your realms.

To learn how to query for data in local realms, see Query Engine.

For information about how to react to changes in realm data, see Notifications.

For advice on how to safely interact with Realm Database across threads in an application, see Threading.

For additional security, you can also encrypt a realm.

The Android SDK also connects your Realm client application with your Realm app's backend services, including Functions, Services, Webhooks, Realm Sync, and built-in third-party authentication.

To get connected to your MongoDB Realm app, see Initialize the Realm App Client.

You can also access custom user data.

To learn how to connect to a MongoDB Realm app to call Functions, query data in an instance of MongoDB Atlas, and synchronize data in realms, see Call a Function.

To learn how to query for data in MongoDB remotely, see Remotely Access MongoDB.

MongoDB Realm uses additional support files, detailed in Auxiliary Files.

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