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https://github.com/Baseflow/flutter_cached_network_image
Download, cache and show images in a flutter app
https://github.com/Baseflow/flutter_cached_network_image
baseflow caching flutter image imageprovider
Last synced: about 1 month ago
JSON representation
Download, cache and show images in a flutter app
- Host: GitHub
- URL: https://github.com/Baseflow/flutter_cached_network_image
- Owner: Baseflow
- Created: 2017-12-02T12:57:53.000Z (about 7 years ago)
- Default Branch: develop
- Last Pushed: 2024-04-29T09:28:48.000Z (8 months ago)
- Last Synced: 2024-05-20T22:45:59.916Z (7 months ago)
- Topics: baseflow, caching, flutter, image, imageprovider
- Language: Dart
- Homepage: https://baseflow.com
- Size: 908 KB
- Stars: 2,393
- Watchers: 36
- Forks: 633
- Open Issues: 281
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
Awesome Lists containing this project
- awesome-github-star - flutter_cached_network_image
README
# Cached network image
[](https://pub.dartlang.org/packages/cached_network_image)
[](https://codecov.io/gh/Baseflow/flutter_cached_network_image)
[](https://github.com/Baseflow/flutter_cached_network_image/actions/workflows/app_facing_package.yaml)
A flutter library to show images from the internet and keep them in the cache directory.
## Sponsors
Try the Flutter Chat Tutorial 💬
## How to use
The CachedNetworkImage can be used directly or through the ImageProvider.
Both the CachedNetworkImage as CachedNetworkImageProvider have minimal support for web. It currently doesn't include caching.
With a placeholder:
```dart
CachedNetworkImage(
imageUrl: "http://via.placeholder.com/350x150",
placeholder: (context, url) => CircularProgressIndicator(),
errorWidget: (context, url, error) => Icon(Icons.error),
),
```
Or with a progress indicator:
```dart
CachedNetworkImage(
imageUrl: "http://via.placeholder.com/350x150",
progressIndicatorBuilder: (context, url, downloadProgress) =>
CircularProgressIndicator(value: downloadProgress.progress),
errorWidget: (context, url, error) => Icon(Icons.error),
),
```
````dart
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:
```dart
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](https://pub.dartlang.org/packages/flutter_cache_manager).
## FAQ
### My app crashes when the image loading failed. (I know, this is not really a question.)
Does it really crash though? The debugger might pause, as the Dart VM doesn't recognize it as a caught exception; the console might print errors; even your crash reporting tool might report it (I know, that really sucks). However, does it really crash? Probably everything is just running fine. If you really get an app crashes you are fine to report an issue, but do that with a small example so we can reproduce that crash.
See for example [this](https://github.com/Baseflow/flutter_cached_network_image/issues/336#issuecomment-760769361) or [this](https://github.com/Baseflow/flutter_cached_network_image/issues/536#issuecomment-760857495) answer on previous posted issues.