CachedNetworkImageProvider class

IO implementation of the CachedNetworkImageProvider; the ImageProvider to load network images using a cache.

Inheritance
Annotations

Constructors

CachedNetworkImageProvider(String url, {int? maxHeight, int? maxWidth, double scale = 1.0, ErrorListener? errorListener, Map<String, String>? headers, BaseCacheManager? cacheManager, String? cacheKey, ImageRenderMethodForWeb imageRenderMethodForWeb = ImageRenderMethodForWeb.HtmlImage})
Creates an ImageProvider which loads an image from the url, using the scale. When the image fails to load errorListener is called.
const

Properties

cacheKey String?
Cache key of the image to cache
final
cacheManager → BaseCacheManager?
CacheManager from which the image files are loaded.
final
errorListener → ErrorListener?
Listener to be called when images fails to load.
final
hashCode int
The hash code for this object.
no setteroverride
headers Map<String, String>?
Set headers for the image provider, for example for authentication
final
imageRenderMethodForWeb → ImageRenderMethodForWeb
Render option for images on the web platform.
final
maxHeight int?
Maximum height of the loaded image. If not null and using an ImageCacheManager the image is resized on disk to fit the height.
final
maxWidth int?
Maximum width of the loaded image. If not null and using an ImageCacheManager the image is resized on disk to fit the width.
final
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
scale double
Scale of the image
final
url String
Web url of the image to load
final

Methods

createStream(ImageConfiguration configuration) ImageStream
Called by resolve to create the ImageStream it returns.
inherited
evict({ImageCache? cache, ImageConfiguration configuration = ImageConfiguration.empty}) Future<bool>
Evicts an entry from the image cache.
inherited
loadBuffer(CachedNetworkImageProvider key, DecoderBufferCallback decode) ImageStreamCompleter
Converts a key into an ImageStreamCompleter, and begins fetching the image.
override
loadImage(CachedNetworkImageProvider key, ImageDecoderCallback decode) ImageStreamCompleter
Converts a key into an ImageStreamCompleter, and begins fetching the image.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
obtainCacheStatus({required ImageConfiguration configuration, ImageErrorListener? handleError}) Future<ImageCacheStatus?>
Returns the cache location for the key that this ImageProvider creates.
inherited
obtainKey(ImageConfiguration configuration) Future<CachedNetworkImageProvider>
Converts an ImageProvider's settings plus an ImageConfiguration to a key that describes the precise image to load.
override
resolve(ImageConfiguration configuration) ImageStream
Resolves this image provider using the given configuration, returning an ImageStream.
inherited
resolveStreamForKey(ImageConfiguration configuration, ImageStream stream, CachedNetworkImageProvider key, ImageErrorListener handleError) → void
Called by resolve with the key returned by obtainKey.
inherited
toString() String
A string representation of this object.
override

Operators

operator ==(Object other) bool
The equality operator.
override