How To Change Tabbar Text Color In Flutter Android App

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
        home: Scaffold(
            body:ChangeTextColor(),
        ),
    );
  }
}

class ChangeTextColor extends StatefulWidget {
  @override
  ChangeTextColorState createState() {
    return new ChangeTextColorState();
  }
}

class ChangeTextColorState extends State<ChangeTextColor> {
  List<Color> _colors = [
    Colors.orange,
    Colors.lightGreen,
    Colors.pink,
    Colors.brown,
    Colors.indigo
  ];

  int _currentIndex = 0;
  _onChanged() {
    //update with a new color when the user taps button
    int _colorCount = _colors.length;

    setState(() {
      if (_currentIndex == _colorCount - 1) {
        _currentIndex = 0;
      } else {
        _currentIndex += 1;
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 2,
      child: Scaffold(
        appBar: AppBar(
          backgroundColor: Colors.white,
          title: Text("Change Text Color Tabbar Example",style: TextStyle(color: Colors.black),),
          bottom: TabBar(
            indicatorColor: Colors.black,
            labelColor: _colors[_currentIndex],
            tabs: <Widget>[
              Tab(
                text: "First Tab",
              ),
              Tab(
                text: "Second Tab",
              ),
            ],
          ),
        ),
        body: TabBarView(
          children: <Widget>[
            Center(
              child: SizedBox(
                width: 200,
                height: 50,
                child: RaisedButton(
                  onPressed: _onChanged,
                  child: Text("Change Color",),
                  color: Colors.white,
                ),
               )
            ),
            Center(
              child: SizedBox(
                width: 200,
                height: 50,
                child: RaisedButton(
                  onPressed: _onChanged,
                  child: Text("Change Color",),
                  color: Colors.white,
                ),
              )
            ),
          ],
        ),
      ),
    );
  }
}