アプリをRunで起動すると、下記のようなエラーが出ます。

●エラー内容

> Launching lib\main.dart on Android SDK built for x86 in debug mode...  
>  Initializing gradle...  
>  Resolving dependencies...  
>  Finished with error: Please review your Gradle project setup in the
> android/ folder.
>
> Error running Gradle:  
>  ProcessException: Process
> "C:\Users\\\AndroidStudioProjects\flutter_app2\android\gradlew.bat" exited
> abnormally:  
>  FAILURE: Build failed with an exception.
>
>   * Where:  
>  Build file
> 'C:\Users\\\AndroidStudioProjects\flutter_app2\android\build.gradle' > line:
> 24
>
>   * What went wrong:  
>  A problem occurred evaluating root project 'android'.  
>  A problem occurred configuring project ':app'.  
>  Could not resolve all artifacts for configuration ':app:classpath'.  
>  Cannot resolve external dependency com.google.gms:google-services:4.0.1
> because no repositories are defined.  
>  Required by:  
>  project :app
>
>   * 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 1s  
>  Command: C:\Users\\\AndroidStudioProjects\flutter_app2\android\gradlew.bat
> app:properties

build.gradleファイル内に、下記の内容を記載しない場合はエラーは発生しないので、この部分がエラーの原因と思われますが、対応方法などご教授いただけると大変助かります。

```

    buildscript {
    dependencies {
        // Add this line
        classpath 'com.google.gms:google-services:4.0.1'
        }
    }
    allprojects {
        // ...
        repositories {
            google() // Google's Maven repository
            // ...
        }
    }
    
    apply plugin: 'com.android.application'
    
    android {
        // ...
    }
    
    dependencies {
        // ...
        implementation 'com.google.firebase:firebase-core:16.0.1'
        // Getting a "Could not find" error? Make sure you have
        // added the Google maven respository to your root build.gradle
    }
    
    // ADD THIS AT THE BOTTOM
    apply plugin: 'com.google.gms.google-services'
    
```

●build.gradleファイル内容

```

    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 flutt    er.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'
    }
    
    apply plugin: 'com.android.application'
    apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
    
    android {
        compileSdkVersion 28
    
        lintOptions {
            disable 'InvalidPackage'
        }
    
        defaultConfig {
            // TODO: Specify your own unique Application ID (https://developer.andro    id.com/studio/build/application-id.html).
            applicationId "com.example.androidstudio.flutter_app2"
            minSdkVersion 16
            targetSdkVersion 28
            versionCode flutterVersionCode.toInteger()
            versionName flutterVersionName
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunne    r"
        }
    
        buildTypes {
            release {
                // TODO: Add your own signing config for the release build.
                // Signing with the debug keys for now, so `flutter run --release` w    orks.
                signingConfig signingConfigs.debug
            }
        }
    }
    
    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'
    }
    
    
    buildscript {
        dependencies {
            // Add this line
            classpath 'com.google.gms:google-services:4.0.1'
        }
    }
    allprojects {
        // ...
        repositories {
            google() // Google's Maven repository
            // ...
        }
    }
    
    apply plugin: 'com.android.application'
    
    android {
        // ...
    }
    
    dependencies {
        // ...
        implementation 'com.google.firebase:firebase-core:16.0.1'
        // Getting a "Could not find" error? Make sure you have
        // added the Google maven respository to your root build.gradle
    }
    
    // ADD THIS AT THE BOTTOM
    apply plugin: 'com.google.gms.google-services'
    
```
CC BY-SA 4.0
2019-04-05T05:32:29.777
53935
2019-04-05T06:26:11.673
12327
question
android-studio firebase gradle
コンパイル時にエラーが発生します。 flutter、firebaseアプリ（Android Studioで開発）
プロジェクト単位のbuild.gradleとアプリ単位のbuild.gradleの切り分けができていませんでした。  
それぞれ、該当のファイルに書き直したところ、エラーは発生しなくなりました。  
<https://teratail.com/questions/183014>
CC BY-SA 4.0
2019-04-05T06:26:11.673
53937
2019-04-05T06:26:11.673
12327
53935
answer