Refresh indicators

A refresh indicator is a visual cue to indicate that data is being reloaded. It typically appears as an animated spinner when the user performs a "swipe to refresh" gesture, pulling down on a list.

This indicator disappears once the data is updated, signaling that the latest content is now displayed.

Implementation

In Flutter apps, a RefreshIndicator widget asks for a future that complete when the async refresh process is done. This future can be provided by the dispatchAndWait() method.

An example:

// When the user pulls down the list
Future<void> downloadStuff() => dispatchAndWait(DownloadStuffAction());

// In the widget
return RefreshIndicator(
    onRefresh: downloadStuff;
    child: ListView(...),

If you have multiple actions that need to be called to refresh the screen, you can use dispatchAndWaitAll.

Try running the: Dispatch Future Example.