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Add the infinite_list sample (#440)

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This PR adds a Flutter sample app that shows an implementation of the "infinite list" UX pattern. That is, a list is shown to the user as if it was continuous although it is internally paginated. This is a common feature of mobile apps, from shopping catalogs through search engines to social media clients.
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Filip Hracek
2020-05-15 17:53:54 -07:00
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# infinite_list
A Flutter sample app that shows an implementation of the "infinite list" UX pattern. That is,
a list is shown to the user as if it was continuous although it is internally paginated.
This is a common feature of mobile apps, from shopping catalogs through search engines
to social media clients.
![An animated gif of the app in action](https://user-images.githubusercontent.com/919717/81858860-3a1e3280-9519-11ea-8e9c-9d22ac1bf0ed.gif)
This particular sample uses the [Provider][] package but any other state management approach
would do.
[Provider]: https://pub.dev/packages/provider
## Goals for this sample
* Show how UI code can be "shielded" from complex asynchrony and pagination logic using
a `ChangeNotifier`.
* Illustrate use of `Selector` from the Provider package.
## Questions/issues
If you have a general question about Flutter, the best places to go are:
* [Flutter documentation](https://flutter.dev/)
* [StackOverflow](https://stackoverflow.com/questions/tagged/flutter)
If you run into an issue with the sample itself, please
[file an issue](https://github.com/flutter/samples/issues).