如下我匯入了一個WebView外掛

name: flutter_demo description: A new Flutter application.

dependencies:   flutter:     sdk: flutter

  # The following adds the Cupertino Icons font to your application.   # Use with the CupertinoIcons class for iOS style icons.   cupertino_icons: ^0.1.0   #如下我匯入了一個WebView外掛   flutter_webview_plugin: ^0.1.0+1

dev_dependencies:   flutter_test:     sdk: flutter pubspec.yaml  這個檔案相當 AS中的build.gradle

flutter packages get  這個就相當於在AS的Ctrl+9 編譯同步，需要在terminal中執行

pubspec.lock 生成對應的版本

 flutter_webview_plugin:     dependency: "direct main"     description:       name: flutter_webview_plugin       url: "https://pub.dartlang.org"     source: hosted     version: "0.1.5" 提示熱修復無效  請在terminal鍵入R restart app

Some program elements were changed during reload but did not run when the view was reassembled; you may need to restart the app (by pressing "R") for the changes to have an effect.   • _LaunchPage.doubleClick (package:flutter_demo/app/LaunchPage.dart:63) 資原始檔找不到異常  解決方法：  大神 何小有的 Blog:https://blog.csdn.net/hekaiyou/article/details/53204466  然後 記得 多flutter run幾次

D:\androidSpace\flutter_demo>flutter run Running "flutter packages get" in flutter_demo... Error on line 30, column 4 of pubspec.yaml: Expected a key while parsing a block mapping.    assets:    ^ pub get failed (65) 每次更新完flutterSDK都是一臉懵逼  解決 ：https://github.com/flutter/flutter/wiki/Using-Flutter-in-China  配置環境變數

export PUB_HOSTED_URL=https://pub.flutter-io.cn export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn C:\Users\Administrator>flutter Updating flutter tool... Got socket error trying to find package mockito at https://pub.dartlang.org. Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... 遠端蕩下來的專案 需要修改 local.properties 這個檔案引數  這三個都是需要手動配置的

sdk.dir=D:/android_sdk flutter.sdk=D:\\flutter flutter.buildMode=debug Finished with error: Please review your Gradle project setup in the android/ folder. * Error running Gradle: Exit code 1 from: F:\AndroidWorkSpace\Flutter_Gank\android\gradlew.bat app:properties:

FAILURE: Build failed with an exception.

* Where: Build file 'F:\AndroidWorkSpace\Flutter_Gank\android\build.gradle' line: 26

* What went wrong: A problem occurred evaluating root project 'android'. > A problem occurred configuring project ':app'.    > The SDK directory 'D:\android_sdk' does not exist. 外部類不能以下劃線開始命名

error: The name '_Page' isn't a type so it can't be used as a type argument. (non_type_as_type_argument at [flutter_demo] lib\app\FirstPage.dart:16) 1 showSnackbar異常 Scaffold 賦 key 為_scaffoldKey 這個全域性變數即可

Scaffold.of(context).showSnackBar(                             new SnackBar(content: new Text(url))); ==============================================================                    final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>(); key: _scaffoldKey,   _scaffoldKey.currentState.showSnackBar(                             new SnackBar(content: new Text(url))); ---------------------  作者：拍磚哥  來源：CSDN  原文：https://blog.csdn.net/qq_20330595/article/details/80004023  版權宣告：本文為博主原創文章，轉載請附上博文連結！