尝试 Flutter hello world 代码时出现“无法应用插件 [id 'kotlin-android']”

Question

我正在尝试 flutter 的 hello world 代码。我从这里关注官方文档。

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颤振版本：flutter_linux_1.20.1-stable

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我已经创建了 flutter 项目并点击运行：

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flutter create myapp\ncd myapp\nflutter run\n

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但它抛出了这个错误消息：

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Launching lib/main.dart on R40 in debug mode...\n                                                                        \nFAILURE: Build failed with an exception.                                \n                                                                        \n* Where:                                                                \nBuild file \'/home/sjs/flutter-projects/myapp/android/app/build.gradle\' line: 25\n                                                                        \n* What went wrong:                                                      \nA problem occurred evaluating project \':app\'.                           \n> Failed to apply plugin [id \'kotlin-android\']                          \n   > Could not create an instance of type org.jetbrains.kotlin.gradle.dsl.KotlinAndroidProjectExtension.\n      > Could not generate a decorated class for class org.jetbrains.kotlin.gradle.dsl.KotlinAndroidProjectExtension.\n         > org/jetbrains/kotlin/gradle/plugin/KotlinTarget              \n                                                                        \n* Try:                                                                  \nRun 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.\n                                                                        \n* Get more help at https://help.gradle.org                              \n                                                                        \nBUILD FAILED in 18s                                                     \nRunning Gradle task \'assembleDebug\'...                                  \nRunning Gradle task \'assembleDebug\'... Done                        22.1s\nException: Gradle task assembleDebug failed with exit code 1\n

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这是位于 \'/home/sjs/flutter-projects/myapp/android/app/\' 的 build.gradle 文件：

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def localProperties = new Properties()\ndef localPropertiesFile = rootProject.file(\'local.properties\')\nif (localPropertiesFile.exists()) {\n    localPropertiesFile.withReader(\'UTF-8\') { reader ->\n        localProperties.load(reader)\n    }\n}\n\ndef flutterRoot = localProperties.getProperty(\'flutter.sdk\')\nif (flutterRoot == null) {\n    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")\n}\n\ndef flutterVersionCode = localProperties.getProperty(\'flutter.versionCode\')\nif (flutterVersionCode == null) {\n    flutterVersionCode = \'1\'\n}\n\ndef flutterVersionName = localProperties.getProperty(\'flutter.versionName\')\nif (flutterVersionName == null) {\n    flutterVersionName = \'1.0\'\n}\n\napply plugin: \'com.android.application\'\napply plugin: \'kotlin-android\'\napply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"\n\nandroid {\n    compileSdkVersion 28\n\n    sourceSets {\n        main.java.srcDirs += \'src/main/kotlin\'\n    }\n\n    lintOptions {\n        disable \'InvalidPackage\'\n    }\n\n    defaultConfig {\n        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).\n        applicationId "com.example.myapp"\n        minSdkVersion 16\n        targetSdkVersion 28\n        versionCode flutterVersionCode.toInteger()\n        versionName flutterVersionName\n    }\n\n    buildTypes {\n        release {\n            // TODO: Add your own signing config for the release build.\n            // Signing with the debug keys for now, so `flutter run --release` works.\n            signingConfig signingConfigs.debug\n        }\n    }\n}\n\nflutter {\n    source \'../..\'\n}\n\ndependencies {\n    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"\n}\n

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这是flutter doctor -v输出：

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[\xe2\x9c\x93] Flutter (Channel stable, 1.20.1, on Linux, locale en_US.UTF-8)\n    \xe2\x80\xa2 Flutter version 1.20.1 at /home/sjs/flutter\n    \xe2\x80\xa2 Framework revision 2ae34518b8 (2 days ago), 2020-08-05 19:53:19 -0700\n    \xe2\x80\xa2 Engine revision c8e3b94853\n    \xe2\x80\xa2 Dart version 2.9.0\n\n[\xe2\x9c\x93] Android toolchain - develop for Android devices (Android SDK version 30.0.1)\n    \xe2\x80\xa2 Android SDK at /home/sjs/Android/Sdk\n    \xe2\x80\xa2 Platform android-30, build-tools 30.0.1\n    \xe2\x80\xa2 Java binary at: /home/sjs/android-studio/jre/bin/java\n    \xe2\x80\xa2 Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)\n    \xe2\x80\xa2 All Android licenses accepted.\n\n[\xe2\x9c\x93] Android Studio (version 4.0)\n    \xe2\x80\xa2 Android Studio at /home/sjs/android-studio\n    \xe2\x80\xa2 Flutter plugin version 48.0.2\n    \xe2\x80\xa2 Dart plugin version 193.7361\n    \xe2\x80\xa2 Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)\n\n[\xe2\x9c\x93] Connected device (1 available)\n    \xe2\x80\xa2 R40 (mobile) \xe2\x80\xa2 00114604032517 \xe2\x80\xa2 android-arm \xe2\x80\xa2 Android 9 (API 28)\n\n\xe2\x80\xa2 No issues found!\n

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Answer 1

好的，在这里找到解决方案：https://github.com/react-native-community/react-native-webview/issues/1407#issuecomment-634436481

我必须编辑该<project-folder>/android/app/build.gradle文件。我已经更换了线

ext.kotlin_version = '1.3.50'

有了这个

ext.kotlin_version = '1.3.72'

然后就跑了flutter run。