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flutter cached network image tutorial

in flutter, displaying images from the internet can be a common requirement. however, repeatedly fetching the same images can lead to performance issues and increased data usage. to solve this, you can use the `cached_network_image` package, which caches images for you, allowing for faster loading times and reduced network requests.

step 1: setting up your flutter project

if you haven't already created a flutter project, start by creating a new one:



step 2: adding dependencies

to use cached network images, you need to add the `cached_network_image` package to your `pubspec.yaml` file. open the file and add the following line under `dependencies`:



after adding the dependency, run:



step 3: basic usage

now that you have the package installed, you can use it in your flutter application. below is an example of how to implement `cachednetworkimage`.

example code



code explanation

1. **import statements**: we import the necessary packages, including `cached_network_image`.

2. **main app widget**: the `myapp` class initializes the app and sets up the basic structure, including an `appbar`.

3. **imagescreen widget**: this widget is responsible for displaying the cached network image.
**imageurl**: replace this url with the one you want to load.
**cachednetworkimage**: this widget handles the fetching and caching of the image.
**imagebuilder**: a function that returns a widget (in this case, a `container`) that displays the image when successfully loaded.
**placeholder**: a widget (like a `circularprogressindicator`) that shows while the image is loading.
**errorwidget**: a widget (like an `icon`) that shows if there’s an error loading the image.

step 4: running the app

to see your cached network image in action, run the app using:



additional features

1. **custom cache manager**: you can create a custom cache manager by extending the `basecachemanager` class if you need more ...

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Flutter
cached network image
image caching
network images
Flutter widgets
performance optimization
asynchronous image loading
image placeholder
error handling
Flutter plugins
remote images
image retrieval
cache management
Flutter development
UI optimization