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A Flutter widget that will loop through urls until it finds a valid imageurl or builds the error widget
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| import 'package:cached_network_image/cached_network_image.dart'; | |
| import 'package:flutter/material.dart'; | |
| class FallbackLoadingCachedNetworkImage extends StatelessWidget { | |
| final List<String> urls; | |
| final LoadingErrorWidgetBuilder errorWidget; | |
| const FallbackLoadingCachedNetworkImage({ | |
| Key key, | |
| @required this.urls, | |
| this.errorWidget, | |
| }) : super(key: key); | |
| @override | |
| Widget build(BuildContext context) { | |
| return getChild(urls, errorWidget); | |
| } | |
| Widget getChild(List<String> urlList, LoadingErrorWidgetBuilder errorWidget) { | |
| List<String> remainingList = urlList; | |
| return CachedNetworkImage( | |
| imageUrl: remainingList.removeAt(0), | |
| imageBuilder: (context, imageProvider) => Container( | |
| decoration: BoxDecoration( | |
| borderRadius: BorderRadius.circular(4), | |
| image: DecorationImage(image: imageProvider, fit: BoxFit.cover), | |
| ), | |
| ), | |
| fit: BoxFit.cover, | |
| errorWidget: (context, url, error) { | |
| if (remainingList.isNotEmpty) { | |
| return getChild(remainingList, errorWidget); | |
| } else { | |
| if (errorWidget != null) { | |
| return errorWidget(context, url, error); | |
| } else { | |
| return null; | |
| } | |
| } | |
| }, | |
| ); | |
| } | |
| } |
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