如何在Flutter中设置带有权重的宽度？

Question

我想要出示一张有这样图片和标题的卡片：

但结果错误：

我不知道如何在Android中设置权重小部件宽度，我想为图片设置 weight=1 ， match_parent < / strong>其他部分。
这是我的代码，我的错误在哪里？请更正代码。

import 'package:flutter/material.dart';

class SampleAppPage extends StatefulWidget {
  SampleAppPage({Key key}) : super(key: key);

  @override
  _SampleAppPageState createState() => new _SampleAppPageState();
}

class _SampleAppPageState extends State<SampleAppPage> {
  List widgets = [];

  @override
  void initState() {
    super.initState();
    for (int i = 0; i < 100; i++) {
      widgets.add(getRow(i));
    }
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Sample App"),
      ),
      body: new ListView(children: widgets),
    );
  }

  Widget getRow(int i) {
    return new GestureDetector(
      child: new Card(
        child: new Padding(
          padding: new EdgeInsets.all(10.0),
          child: new Row(
            mainAxisAlignment: MainAxisAlignment.end,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              new Padding(
                padding: new EdgeInsets.all(10.0),
                child: new Column(
                  mainAxisAlignment: MainAxisAlignment.start,
                  children: <Widget>[
                    new Text("عنوان کتاب$i",
                      style: new TextStyle(fontFamily: 'IranSans',
                          fontSize: 16.0,
                          color: new Color.fromARGB(1, 0, 0, 1)),),
                    new Text("این نسخه صرفا برای تست برنامه است. $i",
                      style: new TextStyle(fontFamily: 'IranSans',
                          fontSize: 14.0,
                          color: new Color.fromARGB(0, 1, 0, 1)),),
                  ],
                ),
              ),
              new Image.asset("images/default_cover.jpg",),
            ],
          ),
        ),
      ),
      onTap: () {
        setState(() {
          widgets = new List.from(widgets);
          widgets.add(getRow(widgets.length + 1));
          print('row $i');
        });
      },
    );
  }
}

Answer 1

import 'package:flutter/material.dart';

void main() => runApp(
      new MaterialApp(
        debugShowCheckedModeBanner: false,
        home: new HomePage(),
      ),
    );

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => new _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text('Home'),
      ),
      body: new Card(
        child: new Container(
          alignment: Alignment.topRight,
          padding: const EdgeInsets.all(10.0),
          child: new FittedBox(
            child: new Row(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                new Column(
                  crossAxisAlignment: CrossAxisAlignment.end,
                  children: <Widget>[
                    new Padding(
                      padding: const EdgeInsets.symmetric(horizontal: 8.0),
                      child: new Text('Title', style: new TextStyle(fontSize: 30.0, fontWeight: FontWeight.bold),),
                    ),
                    new Padding(
                      padding: const EdgeInsets.symmetric(horizontal: 8.0),
                      child: new Text('Description', style: new TextStyle(fontSize: 20.0),),
                    ),
                  ],
                ),
                new Placeholder(fallbackWidth: 150.0, fallbackHeight: 200.0,)
              ],
            ),
          ),
        ),
      )
    );
  }
}

将占位符替换为所需的图像窗口小部件。希望这有帮助！