Geocoder Runtime error in new flutter upgrade - flutter

Question

I have been using Geocoder-0.1.2, from starting, and it did not cause me any problem. I have just upgraded my flutter and while running my project, I get this error:
Compiler message:
file:///Users/alok/flutter/.pub-cache/hosted/pub.dartlang.org/geocoder-0.1.2/lib/services/d
istant_google.dart:38:56: Error: The argument type 'Utf8Decoder' can't be assigned to the
parameter type 'StreamTransformer<Uint8List, dynamic>'.
- 'Utf8Decoder' is from 'dart:convert'.
- 'StreamTransformer' is from 'dart:async'.
- 'Uint8List' is from 'dart:typed_data'.
Try changing the type of the parameter, or casting the argument to
'StreamTransformer<Uint8List, dynamic>'.
final responseBody = await response.transform(utf8.decoder).join();
^
Compiler failed on /Users/alok/MyProjects/newmonkapp/lib/main.dart
Error launching application on iPhone 7.
Since the error shows it is in the main.dart, there is no code related to that, I have doubled checked it. Here you go.
main.dart
import 'package:flutter/material.dart';
void main() => runApp(NewMonkApp());
class NewMonkApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
print("in the main builder");
return MaterialApp(
title: 'XYZ',
debugShowCheckedModeBanner: false,
theme: ThemeData(
backgroundColor: Color.fromRGBO(249, 249, 251, 1),
fontFamily: 'SF Pro',
primaryColor: Color.fromRGBO(253, 92, 99, 1),
textTheme: TextTheme(
headline: TextStyle(
fontSize: 34.0, fontWeight: FontWeight.bold,
color: Color.fromRGBO(64, 72, 82, 1)
)
)
),
initialRoute: "/",
routes: {
"/": (context) => InitPage(),
// "/": (context) => SearchFilterPage()
}
);
}
}
And it exits the application. Don't know what the problem is, and how should I fix this. I have tried to google it, seems like couldn't find a better solution for this. Any help would be appreciated.
Flutter Doctor results:
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel master, v1.8.1-pre.44, on Mac OS X 10.14.5 18F132, locale en-US)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] Xcode - develop for iOS and macOS (Xcode 10.2.1)
[✓] iOS tools - develop for iOS devices
[✓] Chrome - develop for the web
[!] Android Studio (version 3.4)
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] Connected device (3 available)
! Doctor found issues in 1 category.
Any help would be appreciated. Thanks :)

Answer 1

change this line final response = await request. close().
to
final response = await request.close().then((response){ response.cast>().transform(utf8.decoder).listen((content) { return content; }); });
This worked for me😘
Inside flutter plugins, geocoder and file name distant_google.dart