maintainVisibleContentPosition prop support for Android react-native.

[ Built with ♥ at Stream ]

In react-native, ScrollView (and FlatList) component have support for a prop maintainVisibleContentPosition, which is really useful for chat-like applications where you want to see new messages scroll into place. Also you might need it in other applications where you need bi-directional infinite scroll. Although currently its only supported on iOS. So here we have built a simple wrapper for FlatList and ScrollView to add support for this prop for android. On iOS, we simply return FlatList and ScrollView from react-native package.

We built this wrapper for our in-house react-native chat sdk, but we are making it public, in case it helps other devs from react-native community.

Before you proceed, please don't forget to also check other relevant packages, built at Stream:

• react-native-bidirectional-infinite-scroll
• stream-chat-react-native

⚠️ Horizontal list is currently not supported on this package.

Example

#  clone the repo
git clone https://github.com/GetStream/flat-list-mvcp.git
cd flat-list-mvcp/Example

# Install npm and pod dependencies
yarn; npx pod-install;

# run the app
npx react-native run-android

Installation

yarn add @stream-io/flat-list-mvcp

Usage

import { FlatList, ScrollView } from '@stream-io/flat-list-mvcp';

<FlatList
    maintainVisibleContentPosition={{
        autoscrollToTopThreshold: 10,
        minIndexForVisible: 1,
    }}
    ...
/>

<ScrollView
    maintainVisibleContentPosition={{
        autoscrollToTopThreshold: 10,
        minIndexForVisible: 1,
    }}
    ...
/>

Expo support

This package doesn't support Expo managed workflow. There is a feature request open for expo - https://expo.canny.io/feature-requests/p/android-maintainvisiblecontentposition-on-flatlist (please upvote)

Credits

Thanks to stackia for https://github.com/facebook/react-native/pull/29466#issuecomment-664367382

Contributing

PRs for improvement are welcome :)

License

MIT