How to get index from Column, Row

Question

I made a customGirdView like below, everything as I expected, but I want to make an event when I click an item, I cannot get the index of each item, it always toasts the last value of index:

customGirdView(List<SuggestionsProductModel> data) {
    List<Widget> widgets = List<Widget>();

    int index = 0;

    while (index < data.length) {
      widgets.add(Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          /*item 1*/
          Expanded(
            child: InkWell(
              onTap: () {
                Fluttertoast.showToast(
                    msg: 'Clicked to ' + index.toString(),
                    toastLength: Toast.LENGTH_SHORT,
                    gravity: ToastGravity.BOTTOM,
                    timeInSecForIos: 1,
                    backgroundColor: Colors.black87,
                    textColor: Colors.white,
                    fontSize: 16.0);
              },
              child:Center()),
            ),
          ),
          /*item 2*/
          Expanded(
            child: InkWell(
              onTap: () {
                Fluttertoast.showToast(
                    msg: 'Clicked to ' + (index + 1).toString(),
                    toastLength: Toast.LENGTH_SHORT,
                    gravity: ToastGravity.BOTTOM,
                    timeInSecForIos: 1,
                    backgroundColor: Colors.black87,
                    textColor: Colors.white,
                    fontSize: 16.0);
              },
              child: Center(),
            ),
          ),
        ],
      ));
      index += 2;
    }

    return Column(
      children: widgets,
    );
  }

Answer 1

How about using a ListView.builder? See doc here: https://api.flutter.dev/flutter/widgets/ListView/ListView.builder.html

ListView.builder(
    itemCount: 2,
    itemBuilder: (context, snapshot){
      Expanded(
            child: InkWell(
              onTap: () {
                Fluttertoast.showToast(
                    msg: 'Clicked to ' + (index).toString(),
                    toastLength: Toast.LENGTH_SHORT,
                    gravity: ToastGravity.BOTTOM,
                    timeInSecForIos: 1,
                    backgroundColor: Colors.black87,
                    textColor: Colors.white,
                    fontSize: 16.0);
              },
              child: Center(),
            ),
          ),
    },
)

You wouldn't need to specify your msg as index, index + 1, index + 2, etc... just refer to index and it goes through the list. Optionally, remove the itemCount to make it infinitely long. You can also add

if(index > x){
return null;
}

to stop the list at any given index.

Hope I could help.

Answer 2

Index can be added and can get for child widget as mentioned in the below article. The articale is written by my self. Assuming that the inforamtion is more relevant here.

Indexed Column and indexed Row