ChromeSafariBrowser: The getter 'android' was called on null

[hallidev]

Environment

Flutter version: Flutter 1.12.13+hotfix.8 • channel stable
Plugin version: Direct from git (couldn't get pub package running) -
flutter_inappwebview:
git:
url: https://github.com/pichillilorenzo/flutter_inappwebview.git
Android version: 10 (Emulator)
iOS version:
Xcode version:
Device information: Pixel 3

Description

The following is just a copy / paste from the ChromeSafariBrowser section of readme.md. Using this and running in a fresh Flutter app results in "The getter 'android' was called on null"

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

class MyInAppBrowser extends InAppBrowser {

  @override
  Future onLoadStart(String url) async {
    print("\n\nStarted $url\n\n");
  }

  @override
  Future onLoadStop(String url) async {
    print("\n\nStopped $url\n\n");
  }

  @override
  void onLoadError(String url, int code, String message) {
    print("\n\nCan't load $url.. Error: $message\n\n");
  }

  @override
  void onExit() {
    print("\n\nBrowser closed!\n\n");
  }

}

class MyChromeSafariBrowser extends ChromeSafariBrowser {
  
  MyChromeSafariBrowser(browserFallback) : super(bFallback: browserFallback);

  @override
  void onOpened() {
    print("ChromeSafari browser opened");
  }

  @override
  void onLoaded() {
    print("ChromeSafari browser loaded");
  }

  @override
  void onClosed() {
    print("ChromeSafari browser closed");
  }
}

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

class MyApp extends StatefulWidget {
  final ChromeSafariBrowser browser = new MyChromeSafariBrowser(new MyInAppBrowser());
  
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('ChromeSafariBrowser Example'),
        ),
        body: Center(
          child: RaisedButton(
              onPressed: () async {
                await widget.browser.open(
                    url: "https://flutter.dev/",
                    options: ChromeSafariBrowserClassOptions(
                        android: AndroidChromeCustomTabsOptions(addShareButton: false),
                        ios: IosSafariOptions(barCollapsingEnabled: true)));
              },
              child: Text("Open Chrome Safari Browser")),
        ),
      ),
    );
  }
}

Expected behavior:

ChromeSafariBrowser opens

Current behavior:

Exception is thrown, browser doesn't open

Steps to reproduce

1. Create new flutter app
2. Paste in the above code
3. Run, click "open" button

[hallidev]

Was my fault - was missing ChromeSafariBrowserClassOptions