> ## Documentation Index
> Fetch the complete documentation index at: https://docs.joinmassive.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How do I initialize the Massive SDK on Android/Fire OS?

Use the following method in your `Activity` or `Application` class:

```java theme={null}
MassiveClient.init(API_TOKEN, this)
```

Learn more: [Android Integration Guide](https://docs.joinmassive.com/monetization-sdk/mobile-android#integration-to-the-app).