How to Show an Local Image till the NetworkImage() Loads Up in flutter?

• General

When the user performs some action on a screen the compiler will fetch data from the backend and will display data to the user. While fetching data sometimes we need to display a local image till the NetworkImage() Loads Up so in this article we will learn about How to Show a Local Image till the NetworkImage() Loads Up in flutter?

Discover how to gracefully handle image loading in Flutter by showing a local placeholder image until the NetworkImage() finishes loading. In this informative blog post, explore techniques and code snippets that enable you to display a temporary local image while waiting for the network image to load. Enhance user experience, reduce perceived loading time, and ensure a seamless visual transition between placeholder and final image. Whether you’re building an image-heavy app or working with slow network connections, this tutorial will guide you step-by-step through the process of implementing this efficient and user-friendly approach. Elevate your Flutter app’s image loading experience today by mastering the art of displaying a local image while the NetworkImage() loads.

Know How to Show a Local Image till the NetworkImage() Loads Up in flutter?

Use a Stateful Widget and you can add a listener to the ImageStream and override the initState() to trigger a replacement between the local image and the one obtained from the internet when it is fully loaded.

Code Snippet will look like the below:

 var _loadImage = new AssetImage(
      'assets/img/basic2-090_loader_loading-512.png');
  var _myEarth = new NetworkImage(
      "http://qige87.com/data/out/73/wp-image-144183272.png");
  bool _checkLoaded = true;

  @override
  void initState() {
    _myEarth.resolve(new ImageConfiguration()).addListener((_, __) {
      if (mounted) {
        setState(() {
          _checkLoaded = false;
        });
      }
    });
  }


  @override
  Widget build(BuildContext context) {
    return new Scaffold(
        body: new Center(child: new Container(
          decoration: new BoxDecoration(shape: BoxShape.circle,),
          height: 80.0,
          width: 80.0,
          child: new CircleAvatar(
            backgroundColor: Theme
                .of(context)
                .scaffoldBackgroundColor,
            backgroundImage: _checkLoaded ? _loadImage : _myEarth,
          ),)
        )
    );
  }
}

You can try with a package named flutter_url_image_load_fail to define the loading and failed to load widgets:

LoadImageFromUrl(
    'https://upload.wikimedia.org/wikipedia/commons/1/17/Google-flutter-logo.png', //Image URL to load
    (image) => image, //What widget returns when the image is loaded successfully
    () => Text('Loading...'), //What widget returns when the image is loading
    (IRetryLoadImage retryLoadImage, code , message){ //What widget returns when the image failed to load
        return RaisedButton(
            child: Text('Try Again'),
            onPressed: (){
                retryLoadImage.retryLoadImage(); //Call this method to retry load the image when it failed to load
            },
        );
    },
    requestTimeout: Duration(seconds: 5) //Optionally set the timeout
)

Two way to solve your problem

1) Using Image. network : If you want to show progressbar, simmer, or any other widget when image loading.

Image.network(
    "URL",
    fit: BoxFit.cover,
    loadingBuilder: (BuildContext ctx, Widget child, ImageChunkEvent loadingProgress) {
      if (loadingProgress == null) {
        return child;
      }else {
        return Center(
          child: CircularProgressIndicator(
            valueColor: AlwaysStoppedAnimation<Color>(Colors.green),
          ),
        );
      }
    },       
)

2) Using FadeInImage : If you want to display your local image when network image loading.

FadeInImage.assetNetwork( 
   image:"URL",
   placeholder:"assets/loading.png" // your assets image path
   fit: BoxFit.cover,
 )

Conclusion:

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Written by Abhishek Dhanani

Abhishek Dhanani, a skilled software developer with 3+ years of experience, masters Dart, JavaScript, TypeScript, and frameworks like Flutter and NodeJS. Proficient in MySQL, Firebase, and cloud platforms AWS and GCP, he delivers innovative digital solutions.