Flutter 圆形/圆角头像图片

图片显示

1、本地图片

Image.asset加载项目资源包的图片

//先将图片拷贝到项目 images 目录中，然后在 pubspec.yaml文件配置文件相对路径到 assets 

Image.asset('images/pic1.jpg'),

Image.file加载手机内置或外置存储的图片

//加载Android平台的外置存储图片需要AndroidManifest.xml配置android.permission.READ_EXTERNAL_STORAGE权限

Image.file(
  File('/0/images/cat.jpg'),
  width: 200,
  height: 200,
)

2、网络图片

Image.network无本地缓存

Image.network(
    'https://pic2.zhimg.com/v2-639b49f2f6578eabddc458b84eb3c6a1.jpg',
    width: 120,
    height: 120
),

FadeInImage.assetNetwork淡入效果，无本地缓存

FadeInImage.assetNetwork(
  placeholder: 'images/avatar.png',
  image: 'https://pic1.zhimg.com/v2-7fab628481a26f025188b095b5cfafbc.jpg',
  width: 200,
  height: 200
)

CachedNetworkImage第三方控件，有本地缓存和淡入效果

//1、将依赖框架配置到pubspec.yaml文件
dependencies:
  cached_network_image: ^0.7.0

//2、引入相关类
import 'package:cached_network_image/cached_network_image.dart';

//3、使用控件，默认自带图片淡入效果
CachedNetworkImage(
  imageUrl: 'https://pic4.zhimg.com/v2-19dced236bdff0c47a6b7ac23ad1fbc3.jpg',
  width: 200,
  height: 200,
)

圆形头像

1、CircleAvatar

CircleAvatar(
   //头像半径
   radius: 60,
    //头像图片
    backgroundImage: NetworkImage('https://pic2.zhimg.com/v2-639b49f2f6578eabddc458b84eb3c6a1.jpg'),
),

2、ClipOval

ClipOval( //圆形头像
   child: new Image.network(
      'https://pic2.zhimg.com/v2-639b49f2f6578eabddc458b84eb3c6a1.jpg',
      width: 200.0,
   ),
),

3、Container + BoxDecoration

Container(
  width: 120,
  height: 120,
  decoration: BoxDecoration(
    shape: BoxShape.circle,
    image: DecorationImage(
      image: NetworkImage('https://pic2.zhimg.com/v2-639b49f2f6578eabddc458b84eb3c6a1.jpg'),
      fit: BoxFit.cover
    )
  )
)

圆角图片

1、ClipRRect

ClipRRect( //圆角图片
   borderRadius: BorderRadius.circular(8),
   child: Image.network(
        'https://pic2.zhimg.com/v2-639b49f2f6578eabddc458b84eb3c6a1.jpg',
        width: 120,
        height: 120
   ),
),

2、Container + BoxDecoration

Container(
  width: 120,
  height: 120,
  decoration: BoxDecoration(
    borderRadius: BorderRadius.circular(8),
    image: DecorationImage(
      image: NetworkImage('https://pic2.zhimg.com/v2-639b49f2f6578eabddc458b84eb3c6a1.jpg')
    )
  )
)

其他各种形状

使用ShapeDecoration可以做出各种形状

• 斜切角: BeveledRectangleBorder
• 圆角: RoundedRectangleBorder
• 超椭圆: SuperellipseShape
• 体育场: StadiumBorder
• 圆形: CircleBorder

//斜切角形状示例
Container(
  width: 120,
  height: 120,
  decoration: ShapeDecoration(
    shape: BeveledRectangleBorder(
      borderRadius: BorderRadius.circular(16)
    ),
    image: DecorationImage(
      fit: BoxFit.cover,
      image: NetworkImage('https://pic2.zhimg.com/v2-639b49f2f6578eabddc458b84eb3c6a1.jpg')
    )
  )
)