How to load a large number of images in Flutter?

In Flutter, you can use ListView.builder or GridView.builder to load a large amount of images.

First, make sure you have imported the flutter_staggered_grid_view plugin.

dependencies:
  flutter_staggered_grid_view: ^0.4.0

Next, you can use the following code to load a large quantity of images:

import 'package:flutter/material.dart';
import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';

class ImageList extends StatelessWidget {
  final List<String> imageUrls = [
    'url1',
    'url2',
    // 添加更多的图片url
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Image List'),
      ),
      body: StaggeredGridView.countBuilder(
        crossAxisCount: 2,
        itemCount: imageUrls.length,
        itemBuilder: (BuildContext context, int index) => Image.network(imageUrls[index]),
        staggeredTileBuilder: (int index) => StaggeredTile.fit(1),
      ),
    );
  }
}

In this example, StaggeredGridView.countBuilder is used to create a GridView where itemCount represents the total number of images, itemBuilder is used to build the widget for each image, and staggeredTileBuilder specifies the size of each image.

Note: In actual development, it is recommended to use the cached_network_image plugin to load network images, as it can improve the performance and user experience of image loading.

dependencies:
  cached_network_image: ^2.5.0

Utilize the example code:

import 'package:flutter/material.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';

class ImageList extends StatelessWidget {
  final List<String> imageUrls = [
    'url1',
    'url2',
    // 添加更多的图片url
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Image List'),
      ),
      body: StaggeredGridView.countBuilder(
        crossAxisCount: 2,
        itemCount: imageUrls.length,
        itemBuilder: (BuildContext context, int index) => CachedNetworkImage(
          imageUrl: imageUrls[index],
          fit: BoxFit.cover,
        ),
        staggeredTileBuilder: (int index) => StaggeredTile.fit(1),
      ),
    );
  }
}

This allows for efficiently loading and displaying a large number of images.