英文:
Flutter, reload an item in List View
问题
这应该很普通，但我找不到太多关于这个的信息。我有一个使用卡片的惰性加载列表，用于显示从http请求中获取的每个记录的数据。当点击卡片中的按钮或执行操作时，如何刷新单个记录的数据？
结构类似于：
Stateful Widget
loadData() // 通过页面加载的http请求
Widget build
TextButton onPressed(){loadData}
ListView.builder(
itemCount: fullList.length,
itemBuilder: (BuildContext context, int index) {
return dataCard(context, fullList, index);
}),
dataCard(context, dl, i)
Text(dl[i].Name)
Text(dl[i].Price)
setIcon(dl[i].type)
...
setIcon(type)
switch type
case 1
return Icon A
case 2
return Icon B
...
我如何检测dataCard或setIcon中的操作并重新加载列表中相应的项目？
英文:
This should be common but I can't find much information about this. I have a lazy loading list with Cards to show data for each record fetched from http request. How do I refresh the data of a single record when a button or action in a Card is being clicked or done?
Structure is something like:
Stateful Widget
loadData() //http request by page loading
Widget build
TextButton onPressed(){loadData}
ListView.builder(
itemCount: fullList.length,
itemBuilder: (BuildContext context, int index) {
return dataCard(context, fullList, index);
}),
dataCard(context, dl, i)
Text(dl[i].Name)
Text(dl[i].Price)
setIcon(dl[i].type)
...
setIcon(type)
switch type
case 1
return Icon A
case 2
return Icon B
...
How can I detect action in dataCard or setIcon and reload the corresponding item in the list?
答案1
得分: 0
void refreshRecord(index) async{
dataList[index].name = 新数值
setState()
}
英文:
By adding a function in stateful class, update the data list by index, then setState().
void refreshRecord(index) async{
dataList[index].name = new value
setState()
}
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