Flutter ListView example with ListView.builder

https://grokonez.com/flutter/flutter-listview-example-listview-builder

Flutter ListView example with ListView.builder

In this tutorial, we're gonna build a Flutter App that shows a ListView. We are using ListView.builder constructor that creates items when they are scrolled onto the screen. The ListView also supports removing item from the list.

More Practice:

• Flutter SQLite example – CRUD Operations with ListView & sqflite plugin
• Flutter Firestore example – Firebase Firestore CRUD with ListView

• Flutter Firebase Database example – Firebase Database CRUD with ListView

• Flutter Dismissible example – Swipe to dismiss/remove Item in ListView

Overview

Flutter App

We will build a Flutter App that can display a List of Post objects, we can also click on the circle Remove Button to delete a Post from the List. This will update the UI immediately because we use StatefulWidget.

List of items with ListView

Initialize the List

We will implement initState() method and call setState() to initialize the List.

class ListViewApp extends StatefulWidget {
  @override
  _ListViewState createState() => new _ListViewState();
}

class _ListViewState extends State {
  final List items = new List();

  @override
  void initState() {
    super.initState();
    setState(() {
      items.add(new Post(...));
      items.add(new Post(...));
      // ...
    });
  }

Use ListView.builder

To display items on the List, we need to render each Object as a Widget.
So we use ListView.builder with itemBuilder callback that returns built-in ListTile Widget for visual structure.

More at:

https://grokonez.com/flutter/flutter-listview-example-listview-builder

Flutter ListView example with ListView.builder