如何避免在Flutter中使用ListView、GridView生成器中的图像？

ListView.builder(
  itemCount: itemCount,
  itemBuilder: (context, index) {
    return FadeInImage.assetNetwork(
      placeholder: 'assets/placeholder.png',
      image: 'https://example.com/image.jpg',
      fit: BoxFit.cover,
    );
  },
)

ListView.builder(
  itemCount: itemCount,
  itemBuilder: (context, index) {
    return CachedNetworkImage(
      imageUrl: 'https://example.com/image.jpg',
      placeholder: (context, url) => CircularProgressIndicator(),
      errorWidget: (context, url, error) => Icon(Icons.error),
    );
  },
)

void preloadImages() async {
  await precacheImage(NetworkImage('https://example.com/image1.jpg'), context);
  await precacheImage(NetworkImage('https://example.com/image2.jpg'), context);
  // ...
}

ListView.builder(
  itemCount: itemCount,
  itemBuilder: (context, index) {
    return Image.network('https://example.com/image1.jpg');
  },
)