NetworkImageLoader class

A concrete implementation of ImageLoader that loads images from the network.

The NetworkImageLoader class extends the ImageLoader abstract class and provides functionality to fetch images from a network URL, cache them locally using the CachedManager, and display them in a widget.

Constructor:

• NetworkImageLoader({CacheManager? cacheManager}):
  • Parameters:
    • cacheManager: An optional instance of CachedManager to handle local file caching. If not provided, a default instance will be created.

Method:

• Future<Widget> loadImage({...}):
  • Loads an image from a network URL or from the local cache if available.
  • Parameters:
    • path: A String representing the URL of the image to load.
    • fit: A BoxFit value that determines how the image should be resized to fit its container.
    • width: A double representing the desired width of the image.
    • height: A double representing the desired height of the image.
    • placeholder: An optional Widget to be displayed while the image is loading. Defaults to null if not provided.
    • errorWidget: An optional Widget to be displayed if the image fails to load. Defaults to null if not provided.
  • Returns: A Future<Widget> that resolves to a widget displaying the loaded image, or a placeholder/error widget as applicable.
  • Example:

    Widget imageWidget = await networkImageLoader.loadImage(
      path: 'https://example.com/image.png',
      fit: BoxFit.cover,
      width: 200.0,
      height: 100.0,
      placeholder: CircularProgressIndicator(),
      errorWidget: Text('Failed to load image'),
    );
    

Error Handling:

If the image cannot be downloaded or the server returns an error code, the method will return the specified errorWidget or an ErrorPlaceholder widget if no error widget is provided.

Inheritance

• Object
• ImageLoader
• NetworkImageLoader

Constructors

NetworkImageLoader({CachedManager? cacheManager})

Creates a NetworkImageLoader instance with an optional cache manager.

Properties

cacheManager → CachedManager

The cache manager instance used for handling cached images.

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

loadImage({required String path, required BoxFit fit, required double width, required double height, Widget? placeholder, Widget? errorWidget}) → Future<Widget>

Loads an image from a network URL or from the local cache if available.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited