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

> 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.

# ON\_DATA\_UPDATE\_START

@SerialName(value = "dataloading")

[ON\_DATA\_UPDATE\_START](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.events/-m-t-event/-o-n_-d-a-t-a_-u-p-d-a-t-e_-s-t-a-r-t/)

Triggered when any map data (style, source, tile, etc) begins loading or changing asynchronously. All dataloading events are followed by a dataDidUpdate, dataUpdateDidAbort or error events.

Members

## Properties

[name](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.offline/-m-t-offline-pack-state/-e-x-p-i-r-e-d/#-372974862%2FProperties%2F1466267346)

val [name](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.offline/-m-t-offline-pack-state/-e-x-p-i-r-e-d/#-372974862%2FProperties%2F1466267346): [String](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/index.html)

[ordinal](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.offline/-m-t-offline-pack-state/-e-x-p-i-r-e-d/#-739389684%2FProperties%2F1466267346)

val [ordinal](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.offline/-m-t-offline-pack-state/-e-x-p-i-r-e-d/#-739389684%2FProperties%2F1466267346): [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)