How To Set Up Square Tabbar With Flutter Using Android

 TabBar(
      labelColor: Colors.indigo,
      unselectedLabelColor: Colors.white,
      indicatorSize: TabBarIndicatorSize.label,
      indicator: BoxDecoration(
          borderRadius: BorderRadius.only(
              topLeft: Radius.circular(10),
              topRight: Radius.circular(10)),
          color: Colors.white),
      tabs: [
        Tab(
          child: Align(
            alignment: Alignment.center,
            child: Text("PHOTO"),
          ),
        ),
        Tab(
          child: Align(
            alignment: Alignment.center,
            child: Text("DATE"),
          ),
        ),
        Tab(
          child: Align(
            alignment: Alignment.center,
            child: Text("PEOPLE"),
          ),
        ),
      ]
  ),
),
body: TabBarView(children: [
  Icon(Icons.photo ,size: 50,),
  Icon(Icons.date_range ,size: 50,),
  Icon(Icons.people ,size: 50,),
]),

import 'package:flutter/material.dart';


void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'App Design',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);


  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
        length: 3,
        child: Scaffold(
          appBar: AppBar(
            centerTitle: true,
            title: Text('Square Tab',style: TextStyle(color: Colors.white),),
            backgroundColor: Colors.indigo,
            elevation: 0,
            bottom: TabBar(
                labelColor: Colors.indigo,
                unselectedLabelColor: Colors.white,
                indicatorSize: TabBarIndicatorSize.label,
                indicator: BoxDecoration(
                    borderRadius: BorderRadius.only(
                        topLeft: Radius.circular(10),
                        topRight: Radius.circular(10)),
                    color: Colors.white),
                tabs: [
                  Tab(
                    child: Align(
                      alignment: Alignment.center,
                      child: Text("PHOTO"),
                    ),
                  ),
                  Tab(
                    child: Align(
                      alignment: Alignment.center,
                      child: Text("DATE"),
                    ),
                  ),
                  Tab(
                    child: Align(
                      alignment: Alignment.center,
                      child: Text("PEOPLE"),
                    ),
                  ),
                ]
            ),
          ),
          body: TabBarView(children: [
            Icon(Icons.photo ,size: 50,),
            Icon(Icons.date_range ,size: 50,),
            Icon(Icons.people ,size: 50,),
          ]),
        )
    );
  }
}