Breaking change with ImageProvider.load in Flutter 1.10

The Flutter team made a breaking change with the ImageProvider in Flutter 1.10.15 (currently Master channel only).

If you are experiencing one of the following errors upgrade to 2.0.0-rc.

The method 'ScaledFileImage.load' has fewer positional arguments than those of overridden method 'ImageProvider.load'

The method 'CachedNetworkImageProvider.load' has fewer positional arguments than those of overridden method 'ImageProvider.load'

Cached network image #

Widget now uses builders for the placeholder and error widget and uses sqflite for cache management. See the docs for more information.

A flutter library to show images from the internet and keep them in the cache directory.

How to use #

The CachedNetworkImage can be used directly or through the ImageProvider.

CachedNetworkImage(
        imageUrl: "http://via.placeholder.com/350x150",
        placeholder: (context, url) => CircularProgressIndicator(),
        errorWidget: (context, url, error) => Icon(Icons.error),
     ),

Image(image: CachedNetworkImageProvider(url))

When you want to have both the placeholder functionality and want to get the imageprovider to use in another widget you can provide an imageBuilder:

CachedNetworkImage(
  imageUrl: "http://via.placeholder.com/200x150",
  imageBuilder: (context, imageProvider) => Container(
    decoration: BoxDecoration(
      image: DecorationImage(
          image: imageProvider,
          fit: BoxFit.cover,
          colorFilter:
              ColorFilter.mode(Colors.red, BlendMode.colorBurn)),
    ),
  ),
  placeholder: (context, url) => CircularProgressIndicator(),
  errorWidget: (context, url, error) => Icon(Icons.error),
),

How it works #

The cached network images stores and retrieves files using the flutter_cache_manager.