import 'package:flutter/material.dart';
import 'package:flutter_custom_tabs/flutter_custom_tabs.dart';

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        body: Center(
          child: FlatButton(
            child: const Text('Show Flutter homepage'),
            onPressed: () => _launchURL(context),
          ),
        ),
      ),
    );
  }

  void _launchURL(BuildContext context) async {
    try {
      await launch(
        'https://flutter.dev',
        option: CustomTabsOption(
          toolbarColor: Theme.of(context).primaryColor,
          enableDefaultShare: true,
          enableUrlBarHiding: true,
          showPageTitle: true,
          animation: CustomTabsAnimation.slideIn()
          // or user defined animation.
          animation: const CustomTabsAnimation(
            startEnter: 'slide_up',
            startExit: 'android:anim/fade_out',
            endEnter: 'android:anim/fade_in',
            endExit: 'slide_down',
          ),
          extraCustomTabs: const <String>[
            // ref. https://play.google.com/store/apps/details?id=org.mozilla.firefox
            'org.mozilla.firefox',
            // ref. https://play.google.com/store/apps/details?id=com.microsoft.emmx
            'com.microsoft.emmx',
          ],        
        ),
      );
    } catch (e) {
      // An exception is thrown if browser app is not installed on Android device.
      debugPrint(e.toString());
    }
  }
}