how to clear cache in CachedNetworkImage flutter

Since CachedNetworkImage version 2.3, all these solutions won't work because it cached images in 2 different places (DefaultCacheManager & NetworkImageProvider)

So the only solution is using the evictFromCache built-in method from CachedNetworkImage

like this:

Future _deleteImageFromCache() async {
    String url = "your url";
    await CachedNetworkImage.evictFromCache(url);
  }

evictFromCache is a Static method so it doesn't require to have the CachedNetworkImage in your Widget tree, you can use it directly from any place.

I agree with MichaelM, Don't use CachedNetworkImage.If you show image like this :

Image.network(
      _headImageUrl,
      fit: BoxFit.fitHeight,
    )

you can use those code to clean image cache:

PaintingBinding.instance.imageCache.clear();

import 'package:flutter_cache_manager/flutter_cache_manager.dart'; await DefaultCacheManager().removeFile('YOUR_URL');

DONT USE emptyCache() from the first answer, it clear ALL your Cache

CachedNetworkImage stores the images in temporary(cache) folder, you can get access to it with path_provider's getTemporaryDirectory() method. There you will find libCachedImageData (You might need to check the name). There you can delete the folder.

To do it in your app you should use Directory class like:

final Directory tempDir = await getTemporaryDirectory();
final Directory libCacheDir = new Directory("${tempDir.path}/libCachedImageData");
await libCacheDir.delete(recursive: true);

If you do not want to store the downloaded image in a cache, then don't use CachedNetworkImage. Instead, use a FadeInImage widget with a NetworkImage:

FadeInImage(
  // here `bytes` is a Uint8List containing the bytes for the in-memory image
  placeholder: // This should be an image, so you can't use progressbar,
  image: NetworkImage('https://backend.example.com/image.png'),
)

In your CachedNetworkImage, add CacheManager Config:

CachedNetworkImage(CacheManager(Config(
              featureStoreKey,
              stalePeriod: const Duration(seconds: 15),
              maxNrOfCacheObjects: 1,
              repo: JsonCacheInfoRepository(databaseName: featureStoreKey),
              fileService: HttpFileService(),
            ),
        ),
  fit: BoxFit.fill,
  imageUrl: Constants.IMAGE_BASE_URL + widget._fileId + Constants.CONTOUR_IMG_SUFFIX,
  placeholder: (context, url) => progressBar,
  errorWidget: (context, url, error) => new Icon(Icons.error),
);

Then to clear it, add this void statement:

void _clearCache() {
try {
  JsonCacheInfoRepository(databaseName: featureMain1Store).deleteDataFile();
} catch (e, s) {
  print(s);
}
imageCache!.clear();
imageCache!.clearLiveImages();
setState(() {});
}

I wanted to test my widget that uses CachedNetworkWidget, but without using the existing cache.

Adding CachedNetworkImage.evictFromCache in the imageBuilder did the job:

 return CachedNetworkImage(
    imageUrl: widget.item.img_url,
    imageBuilder: (context, imageProvider) {
      if (kDebugMode) CachedNetworkImage.evictFromCache(widget.item.img_url);

      //...rest of the code
    },
  );

1- for CachedNetworkImage library

`CachedNetworkImage(
    imageUrl: "https://www.fluttercampus.com/img/logo_small.webp",
    placeholder: (context, url) => CircularProgressIndicator(),
    errorWidget: (context, url, error) => Icon(Icons.error),
    cacheManager: CacheManager(
        Config(
          "fluttercampus",
          stalePeriod: const Duration(days: 7),
          //one week cache period
        )
    ),
)`

you can use one of those

await DefaultCacheManager().removeFile("fluttercampus");

await CachedNetworkImage.evictFromCache('YOUR_URL');

don't use this cause it will delete all data in CacheManager

await DefaultCacheManager().emptyCache();

2- if you want to delete from Image.network use this

Image.network(
      _headImageUrl,
      fit: BoxFit.fitHeight,
    )

you can use those code to clean image cache:

PaintingBinding.instance.imageCache.clear();

In my project, I had to add this feature in the debug menu to give QAs an option to clear cached images.

So earlier, because of this cached_network_image: ^3.3.1 dependency flutter_cache_manager was coming transitively.

However to achieve explicit cache cleanup, we need to add this in pubspec.yaml

flutter_cache_manager: ^3.3.2

Now you get access to DefaultCacheManager and cache can be evicted using below await DefaultCacheManager().emptyCache(); Optionally below line of code will clean up flutter memory cache.

// Clears memory cache
  PaintingBinding.instance.imageCache.clear();
  PaintingBinding.instance.imageCache.clearLiveImages();

Sample code to trigger the cache cleanup on button click

`TextButton(
                onPressed: () async {
                  await DefaultCacheManager().emptyCache();
                  // Clears memory cache
                  PaintingBinding.instance.imageCache.clear();
                  PaintingBinding.instance.imageCache.clearLiveImages();
                  if (context.mounted) {
                    ScaffoldMessenger.of(context)
                      ..clearSnackBars()
                      ..showSnackBar(const SnackBar(content: Text('Image cache cleared')));
                  }
                },
                child: const Text('Clear Image Cache', textAlign: TextAlign.center),
              ),`