Error: 'ModalBottomSheetRoute' is imported from both 'package:flutter/src/material/bottom_sheet.dart' and 'package:modal_bottom_sheet/src/bottom_sheet_route.dart'. ../…/src/material_with_modal_page_route.dart:4 import '../modal_bottom_sheet.dart'; ^^^^^^^^^^^^^^^^^^^^^

: Error: 'ModalBottomSheetRoute' is imported from both 'package:flutter/src/material/bottom_sheet.dart' and 'package:modal_bottom_sheet/src/bottom_sheet_route.dart'. ../…/bottom_sheets/material_bottom_sheet.dart:28 .push(ModalBottomSheetRoute( ^^^^^^^^^^^^^^^^^^^^^ : Error: A value of type 'Object?' can't be returned from an async function with return type 'Future<T?>'. ../…/bottom_sheets/material_bottom_sheet.dart:50

• 'Object' is from 'dart:core'.

• 'Future' is from 'dart:async'. return result;

    ^
  

: Error: 'ModalBottomSheetRoute' is imported from both 'package:flutter/src/material/bottom_sheet.dart' and 'package:modal_bottom_sheet/src/bottom_sheet_route.dart'. ../…/bottom_sheets/bar_bottom_sheet.dart:102 .push(ModalBottomSheetRoute( ^^^^^^^^^^^^^^^^^^^^^ : Error: A value of type 'Object?' can't be returned from an async function with return type 'Future<T?>'. ../…/bottom_sheets/bar_bottom_sheet.dart:125

• 'Object' is from 'dart:core'.
• 'Future' is from 'dart:async'. return result; ^

Target kernel_snapshot failed: Exception

FAILURE: Build failed with an exception.

• Where: Script '/Users/vannak/Documents/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 1151

• What went wrong: Execution failed for task ':app:compileFlutterBuildDebug'.

Process 'command '/Users/vannak/Documents/flutter/bin/flutter'' finished with non-zero exit value 1

• Try:

Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 12m 31s Exception: Gradle task assembleDebug failed with exit code 1

CodePudding user response：

I had a same issue after upgrading flutter new version 3.7.0 yesterday. It is caused by using ModalBottomSheet package from pub.dev.

You have to add below to your pubspec.yaml file.

dependency_overrides:
  modal_bottom_sheet:
    git:
      url: https://github.com/danReynolds/modal_bottom_sheet.git
      path: modal_bottom_sheet

DO NOT DELETE your modal_bottom_sheet and just COPY and PASTE below your dependencies.

CodePudding user response：

Firstly, let's understand this type of issue. If you notice the error

ModalBottomSheetRoute is imported from both package:flutter/src/material/bottom_sheet.dart and package:modal_bottom_sheet/src/bottom_sheet_route.dart.

So it is telling you are getting ModalBottomSheetRoute from two different packages.

Now if you like to use material bottomSheet, you can remove this import package:modal_bottom_sheet/modal_bottom_sheet.dart .

but If you like to use this package class. You can do

• using as prefix

import 'package:flutter/material.dart';
import 'package:modal_bottom_sheet/modal_bottom_sheet.dart' as modalSheet;

.....
    modalSheet.ModalBottomSheetRoute(
      builder: (context) =>

• or you can hide ModalBottomSheetRoute of material

import 'package:flutter/material.dart' hide ModalBottomSheetRoute;
import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';