Flutter listview get current index

by

Sure! Here’s an example of how you can format the answer as HTML content in a `

` without `` and `` tags:

“`html

Flutter ListView – Get Current Index

In Flutter, you can use the `ListView.builder()` constructor to build a
scrollable list that displays widgets lazily as they’re scrolled into
view. To get the current index of an item in the ListView, you can make
use of the `IndexedWidgetBuilder` callback function and the `index`
parameter provided.

Example:

Assuming you have a list of items and want to display them in a ListView:


    List<String> items = ['Item 1', 'Item 2', 'Item 3', 'Item 4'];

    ListView.builder(
      itemCount: items.length,
      itemBuilder: (BuildContext context, int index) {
        return ListTile(
          title: Text(items[index]),
          onTap: () {
            print('Clicked on item ${items[index]} at index $index');
          },
        );
      }
    );

In this example, we have a list of strings (`items`). We use the
`ListView.builder()` constructor to create a ListView and specify the
`itemCount` to be the length of our list. For each item, we create a
`ListTile` widget that displays the item’s name as the title. By using
the `index` parameter passed to the `itemBuilder` callback, we can access
the current index of the item being built. We assign an `onTap` callback
to the ListTile, which prints the clicked item and its index to the
console.

When you run the app and tap on an item in the ListView, the corresponding
item name and index will be printed to the console.

“`

In this HTML content, I have explained the concept of getting the current index in a Flutter ListView and provided an example with code. The example demonstrates how to create a ListView using the `ListView.builder()` constructor and retrieve the index of each item by utilizing the `index` parameter in the `itemBuilder` callback function. When an item is tapped, the code displays the item’s name and index using `print()`.

Leave a comment