Firebase Cloud Messaging FCM 构建错误无法添加任务“：processDebugGoogleServices”作为具有该名称的任务已存在

Question

我正在尝试将推送通知与 Firebase 云消息传递和 Cordova FCM 一起使用。我的 google-services.json 与 config.xml 位于根文件夹中，而 platforms/android/ 文件夹中的相同文件。使用 ionic cordova build 我得到了错误：

配置根项目“android”时出现问题。

无法添加任务“:processDebugGoogleServices”，因为具有该名称的任务已存在。

我已经安装了：

cordova plugin add cordova-support-google-services --save
ionic cordova plugin add cordova-plugin-fcm
npm install --save @ionic-native/fcm

之前还有一个原因：

cordova 插件添加 cordova-plugin-googleplus ...

现在我得到了什么：

platforms/android/cordova-plugin-fcm/myapp-FCMPlugin.gradle：

buildscript {
    repositories {
            jcenter()
            mavenLocal()
        }
    dependencies {
        classpath 'com.android.tools.build:gradle:+'
        classpath 'com.google.gms:google-services:3.0.0'
    }
}
// apply plugin: 'com.google.gms.google-services'
// class must be used instead of id(string) to be able to apply plugin from non-root gradle file
apply plugin: com.google.gms.googleservices.GoogleServicesPlugin

platforms/android/cordova-support-google-services/myapp-build.gradle：

buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:+'
        classpath 'com.google.gms:google-services:3.2.0'
    }
}

// apply plugin: 'com.google.gms.google-services'
// class must be used instead of id(string) to be able to apply plugin from non-root gradle file
ext.postBuildExtras = {
    apply plugin: com.google.gms.googleservices.GoogleServicesPlugin
}

platforms/android/project.properties：

target=android-26
android.library.reference.1=CordovaLib
cordova.system.library.1=com.google.android.gms:play-services-auth:11.0.1
cordova.system.library.2=com.google.android.gms:play-services-identity:11.0.1
cordova.system.library.3=com.facebook.android:facebook-android-sdk:4.14.+
cordova.system.library.4=com.google.firebase:firebase-core:+
cordova.system.library.5=com.google.firebase:firebase-messaging:11.0.1
cordova.gradle.include.1=cordova-plugin-fcm/myapp-FCMPlugin.gradle
cordova.gradle.include.2=cordova-support-google-services/myapp-build.gradle

编辑自：

target=android-26
android.library.reference.1=CordovaLib
cordova.system.library.1=com.google.android.gms:play-services-auth:+
cordova.system.library.2=com.google.android.gms:play-services-identity:+
cordova.system.library.3=com.facebook.android:facebook-android-sdk:4.14.+
cordova.system.library.4=com.google.firebase:firebase-core:+
cordova.system.library.5=com.google.firebase:firebase-messaging:+
cordova.gradle.include.1=cordova-plugin-fcm/myapp-FCMPlugin.gradle

platforms/android/build.gradle 也被编辑为 project.properties：

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
    // SUB-PROJECT DEPENDENCIES START
    debugCompile(project(path: "CordovaLib", configuration: "debug"))
    releaseCompile(project(path: "CordovaLib", configuration: "release"))
    compile "com.google.android.gms:play-services-auth:11.0.1"
    compile "com.google.android.gms:play-services-identity:11.0.1"
    compile "com.facebook.android:facebook-android-sdk:4.14.+"
    compile "com.google.firebase:firebase-core:+"
    compile "com.google.firebase:firebase-messaging:11.0.1"
    // SUB-PROJECT DEPENDENCIES END
}

plugins/cordova-plugin-fcm/scr/android/FCMPlugin.gradle：

buildscript {
    repositories {
            jcenter()
            mavenLocal()
        }
    dependencies {
        classpath 'com.android.tools.build:gradle:+'
        classpath 'com.google.gms:google-services:3.0.0'
    }
}
// apply plugin: 'com.google.gms.google-services'
// class must be used instead of id(string) to be able to apply plugin from non-root gradle file
apply plugin: com.google.gms.googleservices.GoogleServicesPlugin

plugins/cordova-support-google-services/build.gradle：

buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:+'
        classpath 'com.google.gms:google-services:3.2.0'
    }
}

// apply plugin: 'com.google.gms.google-services'
// class must be used instead of id(string) to be able to apply plugin from non-root gradle file
ext.postBuildExtras = {
    apply plugin: com.google.gms.googleservices.GoogleServicesPlugin
}

不知道哪里出了问题，建议会有所帮助

Answer 1

问题是您在 Gradle 配置中指定的 GoogleServices 插件版本存在冲突：

/plugins/cordova-plugin-fcm/scr/android/FCMPlugin.gradle

com.google.gms:google-services:3.0.0

plugins/cordova-support-google-services/build.gradle

com.google.gms:google-services:3.2.0

您需要解决此问题，以便版本匹配。