异常：无法在 Flutter 中实例化图像编解码器

Question

我正在开发一个小应用程序，它从互联网上获取图像并使用NetworkImage()小部件将其显示在屏幕上 。我的代码如下所示：

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      appBar: AppBar(
        title: Text("I am Rich"),
        backgroundColor: Colors.blueGrey[900],
      ),
      backgroundColor: Colors.blueGrey[200],
      body: Center(
        child: Image(
          image: NetworkImage(
              'https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.w3schools.com%2Fw3css%2Fw3css_images.asp&psig=AOvVaw2IxwyCZa7VaOiLr2lA9R2d&ust=1584460177773000&source=images&cd=vfe&ved=2ahUKEwjS8NyhrJ_oAhXt7uAKHURADeMQjRx6BAgAEAc'),
        ),
      ),
    ),
  ));
}

起初SocketException，我试图通过将代码行放在这里来解决这个问题：

现在，当我再次运行模拟器时，它以：

Performing hot restart...
Syncing files to device Android SDK built for x86...
Restarted application in 31,602ms.

???????? Exception caught by image resource service ????????????????????????????????????????????????
The following _Exception was thrown resolving an image codec:
Exception: Could not instantiate image codec.

When the exception was thrown, this was the stack: 
#0      _futurize (dart:ui/painting.dart:4304:5)
#1      instantiateImageCodec (dart:ui/painting.dart:1682:10)
#2      PaintingBinding.instantiateImageCodec (package:flutter/src/painting/binding.dart:88:12)
#3      NetworkImage._loadAsync (package:flutter/src/painting/_network_image_io.dart:104:20)
<asynchronous suspension>
...
Image provider: NetworkImage("https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.w3schools.com%2Fw3css%2Fw3css_images.asp&psig=AOvVaw2IxwyCZa7VaOiLr2lA9R2d&ust=1584460177773000&source=images&cd=vfe&ved=2ahUKEwjS8NyhrJ_oAhXt7uAKHURADeMQjRx6BAgAEAc", scale: 1.0)
Image key: NetworkImage("https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.w3schools.com%2Fw3css%2Fw3css_images.asp&psig=AOvVaw2IxwyCZa7VaOiLr2lA9R2d&ust=1584460177773000&source=images&cd=vfe&ved=2ahUKEwjS8NyhrJ_oAhXt7uAKHURADeMQjRx6BAgAEAc", scale: 1.0)
????????????????????????????????????????????????????????????????????????????????????????????????????

我在这里错过了什么？

Answer 1

您在网络图像中提供的网址并不指向实际图像。尝试像这样改变它

image: NetworkImage('https://www.w3schools.com/w3css/img_lights.jpg')