无法解析com.google.firebase：firebase-database：11.8.0

Question

在文件中添加Firebase数据库依赖项时出现以下错误：

Gradle文件代码在这里：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.mymate.myownidea.fawad.my_mate"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    implementation 'com.google.android.gms:play-services-maps:15.0.1'
    implementation 'com.google.firebase:firebase-database:11.8.0'
    testImplementation 'junit:junit:4.12'

    implementation 'com.android.support:design:27.1.0'
    compile 'com.google.firebase:firebase-core:16.0.0'

    implementation 'com.android.support:multidex:1.0.3'

    implementation 'com.google.firebase:firebase-auth:16.0.2'
    compile 'com.google.firebase:firebase-auth:16.0.2'
    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'

Answer 1

要解决此问题，请更改以下代码行：

implementation 'com.google.firebase:firebase-database:11.8.0'
compile 'com.google.firebase:firebase-core:16.0.0'

到

implementation 'com.google.firebase:firebase-database:16.0.1'
implementation 'com.google.firebase:firebase-core:16.0.1'

并删除以下代码行：

compile 'com.google.firebase:firebase-auth:16.0.2'

也不要忘记在顶级build.gradle文件中添加最新版本的Google Play服务：

classpath 'com.google.gms:google-services:4.0.1'

请参阅here更多信息。

Answer 2

执行以下操作：

将com.google.gms:google-services从3.1.1更新为3.2.0：

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
    classpath 'com.google.gms:google-services:3.2.0'

    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files

    }
}

将compile更改为implementation：

implementation 'com.google.firebase:firebase-core:16.0.0'
implementation 'com.google.firebase:firebase-auth:16.0.2'