How do I make a ReorderableListView ListTile draggable on button/icon press for Flutter?

问题

So I saw the ReorderableListView demo and saw that they had the

"secondary: const Icon(Icons.drag_handle)"

but looking at the reorderable_list.dart file, I noticed that the entire list was draggable on LongPressDraggable anyway [line 424]. So how can I explicitly make changes to either the source code or my own, in order to properly make the icon an actual drag handle?

CheckboxListTile(
      key: Key(item.value),
      isThreeLine: true,
      value: item.checkState ?? false,
      onChanged: (bool newValue) {
        setState(() {
          item.checkState = newValue;
        });
      },
      title: Text('This item represents ${item.value}.'),
      subtitle: secondary,
      secondary: const Icon(Icons.drag_handle),  // Make this Icon drag source
    );

Thanks

回答1:

I think the Icon(Icons.drag_handle) it's just for the looks there, to drag the item in a ReorderableListView you have to long press it.

You can use flutter_reorderable_list and achieve that. As you can see in its demo, this plugin works just the way you want to.

However, it works quite differently of ReorderableListView, the code change can be a bit overwhelming. I created a Widget to simplify that switch, the widget is here and its demo is here.

Take a look and use it if it fits your use case.

来源：https://stackoverflow.com/questions/53201483/how-do-i-make-a-reorderablelistview-listtile-draggable-on-button-icon-press-for