Visual Studio Code 中的 build.gradle 错误（Flutter）答案

【问题标题】：Error on build.gradle In Visual Studio Code(Flutter)Visual Studio Code 中的 build.gradle 错误（Flutter）
【发布时间】：2020-01-16 17:39:32
【问题描述】：

我目前正在尝试为 Google Play 商店构建一个应用程序，并且需要制作一个签名并发布的 APK。我尝试更新两个 build.gradle 文件，但出现此错误：

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/herb/Downloads/morningly/android/app/build.gradle' line: 30

* What went wrong:
A problem occurred evaluating project ':app'.
> Could not find method android() for arguments [build_4k00465lacv9h9hnlvfrbb5oa$_run_closure2@7532b849] on project ':app' of type org.gradle.api.Project.

* 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.

这是我的 build.gradle 文件：

android build.gradle

buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
        classpath 'com.google.gms:google-services:3.2.1'
    } 
}

allprojects {
    repositories {
        google()
        jcenter()
    }
} 

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}

subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

android/app build.gradle

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

def keystoreProperties = new Properties()
   def keystorePropertiesFile = rootProject.file('key.properties')
   if (keystorePropertiesFile.exists()) {
       keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
   }

   android {
    compileSdkVersion 29
    buildToolsVersion "29.0.1"
    lintOptions {
        disable 'InvalidPackage'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.morningly"
        minSdkVersion 16
        targetSdkVersion 29
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    signingConfigs {
       release {
           keyAlias keystoreProperties['keyAlias']
           keyPassword keystoreProperties['keyPassword']
           storeFile file(keystoreProperties['storeFile'])
           storePassword keystoreProperties['storePassword']
       }
   }
   buildTypes {
        release {
            signingConfig signingConfigs.release
            minifyEnabled true
            useProguard true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

apply plugin: 'com.google.gms.google-services'

现在，我按照这篇文章 (https://flutter.dev/docs/deployment/android) 来帮助我完成这个过程。我确保我编辑了正确的 Gradle 文件，我什至检查了答案，但无济于事。请，如果您有任何意见，请告诉我。我非常想上传我的应用程序。

【问题讨论】：

您在 android/app build.gradle 文件的第 30 行上方缺少 apply plugin: 'com.android.application'。没有这个它不理解 android{}。也将 apply plugin: 'com.google.gms.google-services' 上移。
@Jon Goodwin 谢谢，这解决了 android{} 的问题，但现在 flutter() 出现了问题Could not find method flutter() for arguments [build_4k00465lacv9h9hnlvfrbb5oa$_run_closure3@2347bae0] on project ':app' of type org.gradle.api.Project

标签： android gradle flutter dart visual-studio-code

【解决方案1】：

你错过了：

 apply plugin: 'com.android.application'

就在您的 android/app build.gradle 文件的 line 30 上方。没有这个它不理解android{}。移动：

 apply plugin: 'com.google.gms.google-services'

向上，也要保持整洁和最好早点阅读，以后的东西可能依赖它。

【讨论】：