ExtendedNetworkImageProvider class abstract

NetworkImage

Inheritance
Mixed-in types

Constructors

ExtendedNetworkImageProvider.new(String url, {double scale, Map<String, String>? headers, bool cache, int retries, Duration? timeLimit, Duration timeRetry, CancellationToken? cancelToken, String? cacheKey, bool printError, bool cacheRawData, String? imageCacheName, Duration? cacheMaxAge, WebHtmlElementStrategy webHtmlElementStrategy})
Creates an object that fetches the image at the given URL.
factory

Properties

cache → bool
Whether cache image to local
no setter
cacheKey → String?
Custom cache key
no setter
cacheMaxAge → Duration?
The max duration to cahce image. After this time the cache is expired and the image is reloaded.
no setter
cacheRawData → bool
Whether cache raw data if you need to get raw data directly. For example, we need raw image data to edit, but ui.Image.toByteData() is very slow. So we cache the image data here.
no setterinherited
cancelToken → CancellationToken?
Token to cancel network request
no setter
hashCode → int
The hash code for this object.
no setterinherited
headers → Map<String, String>?
The HTTP headers that will be used with HttpClient.get to fetch image from network.
no setter
imageCache → ImageCache
The ImageCache which this is stored in it.
no setterinherited
imageCacheName → String?
The name of ImageCache, you can define custom ImageCache to store this image.
no setterinherited
printError → bool
print error
no setter
rawImageData → Uint8List
The raw data of image
no setterinherited
retries → int
The time to retry to request
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scale → double
The scale to place in the ImageInfo object of the image.
no setter
timeLimit → Duration?
Time Limit to request image
no setter
timeRetry → Duration
The time duration to retry to request
no setter
url → String
The URL from which the image will be fetched.
no setter
webHtmlElementStrategy → WebHtmlElementStrategy
On the Web platform, specifies when the image is loaded as a WebImageInfo, which causes Image.network to display the image in an HTML element in a platform view.
no setter

Methods

createStream(ImageConfiguration configuration) → ImageStream
Called by resolve to create the ImageStream it returns.
inherited
evict({ImageCache? cache, ImageConfiguration configuration = ImageConfiguration.empty, bool includeLive = true}) → Future<bool>
Evicts an entry from the image cache.
inherited
getNetworkImageData({StreamController<ImageChunkEvent>? chunkEvents}) → Future<Uint8List?>
get network image data from cached
instantiateImageCodec(Uint8List data, ImageDecoderCallback decode) → Future<Codec>
Override this method, so that you can handle raw image data, for example, compress
inherited
loadBuffer(ExtendedNetworkImageProvider key, DecoderBufferCallback decode) → ImageStreamCompleter
Converts a key into an ImageStreamCompleter, and begins fetching the image.
inherited
loadImage(ExtendedNetworkImageProvider key, ImageDecoderCallback decode) → ImageStreamCompleter
Converts a key into an ImageStreamCompleter, and begins fetching the image.
inherited
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<ExtendedNetworkImageProvider>
Converts an ImageProvider's settings plus an ImageConfiguration to a key that describes the precise image to load.
inherited
obtainNewKey<S>(S createNewKey(ExtendedNetworkImageProvider value), Future<ExtendedNetworkImageProvider> obtainKey()) → Future<S>
obtain new key base on old key
inherited
resolve(ImageConfiguration configuration) → ImageStream
Resolves this image provider using the given configuration, returning an ImageStream.
inherited
resolveStreamForKey(ImageConfiguration configuration, ImageStream stream, ExtendedNetworkImageProvider key, ImageErrorListener handleError) → void
Called by resolve with the key returned by obtainKey.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Properties

httpClient → dynamic
HttpClient for network, it's null on web
no setter