将Android Studio项目与Firebase集成以实现Google登录功能时的相关性错误 [英] Dependancy error when integrating android studio project with Firebase for a google sign in feature

问题描述

我正在Kotlin中开发一个应用程序，并不断收到错误消息:

I'm developing an app in Kotlin and keep getting the error:

无法解决:firebase-auth-15.0.0`

Failed to resolve: firebase-auth-15.0.0`

当尝试同步gradle时.我正在尝试实现Google登录功能.

when trying to sync gradle. I'm trying to implement a google sign in feature.

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'
apply plugin: 'com.google.gms.google-services'

android {
compileSdkVersion 28
defaultConfig {
    applicationId "nus.is3261.kotlinapp"
    minSdkVersion 21
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:support-v4:28.0.0'
implementation 'com.android.support:design:28.0.0'
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'
implementation 'com.google.firebase:firebase-auth:16.0.1:15.0.0'

}

我试图在堆栈溢出在这里遵循该解决方案，但是在同步gradle Warning: The app gradle file must have a dependency on com.google.firebase:firebase-core for Firebase services to work as intended.

I have tried to follow the solution on stack overflow here, but I am left with this warning after syncing gradle Warning: The app gradle file must have a dependency on com.google.firebase:firebase-core for Firebase services to work as intended.

推荐答案

您遇到以下错误:

无法解决:firebase-auth-15.0.0

Failed to resolve: firebase-auth-15.0.0

因为您在代码中使用了错误的依赖关系.要解决此问题，请更改以下代码行:

Because you are using a wrong dependency in your code. To solve this, please change the following line of code:

implementation 'com.google.firebase:firebase-auth:16.0.1:15.0.0'

到

implementation 'com.google.firebase:firebase-auth:16.0.5'

因为这样的版本16.0.1:15.0.0不存在.

Because such a version 16.0.1:15.0.0 does not exist.

还请添加以下强制性的依赖项:

Please also add the following dependency which is now mandatory:

implementation 'com.google.firebase:firebase-core:16.0.4'

您的应用gradle文件现在必须明确列出com.google.firebase:firebase-core作为Firebase服务按预期工作的依赖项.

Your app gradle file now has to explicitly list com.google.firebase:firebase-core as a dependency for Firebase services to work as expected.

在顶级build.gradle文件中，请确保具有最新版本的Google服务插件:

In your top level build.gradle file please be sure to have the latest version of Google Service plugin:

classpath 'com.google.gms:google-services:4.1.0'

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