`class _Page1State extends State<Page1> {
  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 4,
      child: Scaffold(
        backgroundColor: Colors.amber,
        appBar: AppBar(
          title: Text(widget.title),
        ),
        body: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            TabBar(
              indicatorWeight: 4.0,
              labelStyle: TextStyle(fontSize: 20),
              labelPadding: EdgeInsets.only(right: 32),
              indicatorSize: TabBarIndicatorSize.label,
              isScrollable: true,
              tabs: [
                Text('TabBar1'),
                Text('TabBar2'),
                Text('TabBar3'),
                Text('TabBar4'),
              ],
            ),
            Container(
              height: 400,
              child: TabBarView(
                children: [
                  Container(
                    child: Icon(
                      Icons.person,
                      size: 40,
                    ),
                  ),
                  Container(
                    child: Icon(
                      Icons.card_giftcard,
                      size: 40,
                    ),
                  ),
                  Container(
                    child: Icon(
                      Icons.add_alert,
                      size: 40,
                    ),
                  ),
                  Container(
                    child: Icon(
                      Icons.zoom_out_map,
                      size: 40,
                    ),
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }
}
`

[✓] Flutter (Channel stable, 1.20.1, on Mac OS X 10.15.5 19F101, locale en-IN)
    • Flutter version 1.20.1 at /Users/vaibhav/Documents/flutter
    • Framework revision 2ae34518b8 (8 days ago), 2020-08-05 19:53:19 -0700
    • Engine revision c8e3b94853
    • Dart version 2.9.0

 
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.1)
    • Android SDK at /Users/vaibhav/Library/Android/sdk
    • Platform android-30, build-tools 30.0.1
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.6)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.6, Build version 11E708
    • CocoaPods version 1.9.3

[✓] Android Studio (version 4.0)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 46.0.2
    • Dart plugin version 193.7361
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] VS Code (version 1.47.3)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.13.2

[✓] Connected device (1 available)
    • iPhone 11 (mobile) • 8F609EB6-6129-4CF3-82AD-6381BAF858D4 • ios •
      com.apple.CoreSimulator.SimRuntime.iOS-13-6 (simulator)

• No issues found!