flutter - 我如何控制头像大小和它与FilterChip中的标签之间的间距

Question

头像的大小不想改变，我无法控制间距

这就是我想改变它的方式:

FilterChip(
backgroundColor: _changeColor(t),
avatar: Image.asset('assets/types/$t.png',),
label: Text(t,overflow: TextOverflow.ellipsis,
style: TextStyle(color: Colors.white)),onSelected: (b){},
),

Answer 1

您可以使用 Container 控制头像，FilterChip 具有 padding 和 labelPadding，您可以根据您的要求更改 padding

代码片段

FilterChip(
              padding: const EdgeInsets.only(left: 22.0),
              labelPadding: const EdgeInsets.only(left: 22.0),
              avatar: Container(
                  width: 190.0,
                  height: 190.0,
                  decoration: new BoxDecoration(
                      shape: BoxShape.circle,
                      image: new DecorationImage(
                          fit: BoxFit.fill,
                          image: new NetworkImage(
                              "https://i.imgur.com/BoN9kdC.png")))),
              label: Text("Poison"),
              //selected: badCategoryIds.contains(category.id),
              onSelected: (bool value) {},
            ),

完整代码

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            FilterChip(
              padding: const EdgeInsets.only(left: 22.0),
              labelPadding: const EdgeInsets.only(left: 22.0),
              avatar: Container(
                  width: 190.0,
                  height: 190.0,
                  decoration: new BoxDecoration(
                      shape: BoxShape.circle,
                      image: new DecorationImage(
                          fit: BoxFit.fill,
                          image: new NetworkImage(
                              "https://i.imgur.com/BoN9kdC.png")))),
              label: Text("Poison"),
              //selected: badCategoryIds.contains(category.id),
              onSelected: (bool value) {},
            ),
            Padding(
              padding: const EdgeInsets.all(8.0),
              child: Text(
                'You have pushed the button this many times:',
              ),
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.display1,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

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