---
title: "contextData | Mobile sdk | Mobile sdk android | Android"
description: "contextData"
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# contextData

val [contextData](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.offline/-m-t-offline-pack/context-data/): [ByteArray](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-byte-array/index.html)?

Optional custom data, typically used to store application-specific context (e.g. JSON data).