九宫格图片列表，支持9+以上数量的显示,支持Hero动画预览图片
在flutter的项目文件中增加依赖
dependencies:
...
nineold: ^3.2.2
关于如何运行flutter项目, 参考官方文档documentation.
1.更新pub依赖以及flutter版本2.10.1
2.修复相同图片地址Hero动画tag相同问题
3.图片Hero动画相同地址不能加载
4.修复Hero动画黑屏显示
5.图片长按回调图片位置
6.修复图片显示错位bug
7.增加查看图片长按事件回调
8.支持自定义加载框，以及更多图片文字样式
9.适配屏幕宽高显示
10.支持动态显示9+以上图片
Import nine_old_widget.dart
import 'package:nineold/widget/nine_old_widget.dart';
简单使用方法
class _MyHomePageState extends State<MyHomePage> {
List<List<String>> images = [];
@override
void initState() {
super.initState();
images.add(getData());
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Flutter Nine Old"),
),
body: ListView.separated(
itemBuilder: (context, index) {
return _buildActiveItem(index, getData().sublist(0, index));
},
itemCount: 13,
separatorBuilder: (BuildContext context, int index) =>
Divider(height: 1.0, color: Colors.lightBlueAccent),
),
floatingActionButton: FloatingActionButton(
child: Icon(Icons.add),
onPressed: () {
setState(() {
// count++;
// images.add(getData().sublist(0, count % 15));
});
},
),
);
}
Widget _buildActiveItem(int index, List<String> photos) {
return Container(
margin: EdgeInsets.all(10),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
_buildActiveItemHeader(index),
null != photos || photos.isNotEmpty
? NineOldWidget(
images: photos,
//必填
onLongPressListener: (position) {
//可选
//长按事件回调
print("长按事件回调当前位置 ： $position");
},
backgroundColor: Colors.white,
//可选
//加载背景颜色
valueColor: Colors.red,
//可选
//加载进度条颜色
strokeWidth: 4,
//可选
//加载进度条宽度
moreStyle:
TextStyle(fontSize: 28, color: Colors.orange), //更多加号样式
//可选
//资源加载失败显示
errorWidget: Icon(Icons.error_outline_rounded),
)
: SizedBox()
],
),
);
}
Widget _buildActiveItemHeader(int index) {
return Container(
child: Column(
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
ClipOval(
child: Image.network(
"http://t7.baidu.com/it/u=3616242789,1098670747&fm=79&app=86&f=JPEG?w=900&h=1350",
width: 30.0,
height: 30.0,
),
),
],
),
Text("第$index条")
],
),
);
}
List<String> getData() {
List<String> list = [];
list.add(
"http://t7.baidu.com/it/u=3616242789,1098670747&fm=79&app=86&f=JPEG?w=900&h=1350");
list.add(
"http://t7.baidu.com/it/u=3616242789,1098670747&fm=79&app=86&f=JPEG?w=900&h=1350");
list.add(
"http://t7.baidu.com/it/u=3616242789,1098670747&fm=79&app=86&f=JPEG?w=900&h=1350");
list.add(
"https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=3687862105,320198720&fm=26&gp=0.jpg");
list.add(
"https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=339659526,3524437886&fm=26&gp=0.jpg");
list.add(
"https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=1492148550,3573121792&fm=11&gp=0.jpg");
list.add(
"https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=3059211665,2147448542&fm=26&gp=0.jpg");
list.add(
"https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=2333676140,2717071870&fm=11&gp=0.jpg");
list.add(
"https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=2417108265,1198830140&fm=26&gp=0.jpg");
list.add(
"https://ss1.bdstatic.com/70cFvXSh_Q1YnxGkpoWK1HF6hhy/it/u=244450851,2728981198&fm=26&gp=0.jpg");
list.add(
"https://ss1.bdstatic.com/70cFvXSh_Q1YnxGkpoWK1HF6hhy/it/u=2083759825,3454063564&fm=26&gp=0.jpg");
list.add(
"https://ss1.bdstatic.com/70cFvXSh_Q1YnxGkpoWK1HF6hhy/it/u=310077658,2097249993&fm=11&gp=0.jpg");
list.add(
"https://ss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=415170272,1239551712&fm=26&gp=0.jpg");
list.add(
"https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=1030558027,1672821388&fm=26&gp=0.jpg");
list.add(
"https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=3153722339,140981551&fm=26&gp=0.jpg");
list.add(
"https://t8.baidu.com/it/u=3571592872,3353494284&fm=79&app=86&size=h300&n=0&g=4n&f=jpeg?sec=1584605109&t=4c346851d3f4f4cf76439fe6440ffe9f");
list.add(
"https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1594817167403&di=87226dc3d6b70a7e02722b9f9bd9f33a&imgtype=0&src=http%3A%2F%2Ft9.baidu.com%2Fit%2Fu%3D1307125826%2C3433407105%26fm%3D79%26app%3D86%26f%3DJPEG%3Fw%3D5760%26h%3D3240");
return list;
}
}
NineOldWidget控件构造方法以及参数设置
NineOldWidget(
{@required this.images,
this.moreStyle,
this.backgroundColor = Colors.white,
this.strokeWidth = 3,
this.valueColor = Colors.tealAccent,
this.onLongPressListener,
this.errorWidget});
NineOldWidget 是用来封装图片九宫格显示的组件, 方便使用者能更好的使用该插件. 使用者只要需要注入图片集合，集成和Photo_view的Hero动画以及网络图片加载的展位图进度显示，就可以实现图片查看,九宫格列表
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