無法解析Firestore Android Studio

Question

我正在按照Firestore的教程進行操作，但是隨后發生此錯誤，我在項目級別的Gradle文件中包含了所有必需的內容，我檢查了與我的問題類似的其他問題，而我的情況不一樣。 能否請你幫忙？

錯誤：無法解決：com.google.firebase：firebase-firestore：16.0.1

App lvl Gradle：

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

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.blindnews.kimh2.blindnews"
        minSdkVersion 15
        targetSdkVersion 27
        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'])
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:support-v4:27.1.1'
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-core:16.0.1'
implementation 'com.google.firebase:firebase-auth:16.0.1'
implementation 'com.google.firebase:firebase-firestore:16.0.1'
implementation 'com.google.android.gms:play-services-auth:15.0.1'
implementation 'de.hdodenhof:circleimageview:3.0.0'
implementation 'com.android.support:design:27.1.1'
implementation 'com.android.support:recyclerview-v7:27.1.1'
implementation 'com.android.support:cardview-v7:27.1.1'

}

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

Answer 1

要解決此問題，請更改以下代碼行：

implementation 'com.google.firebase:firebase-core:16.0.1'
implementation 'com.google.firebase:firebase-auth:16.0.1'
implementation 'com.google.firebase:firebase-firestore:16.0.1'
implementation 'com.google.android.gms:play-services-auth:15.0.1'

至

implementation 'com.google.firebase:firebase-core:16.0.6'
implementation 'com.google.firebase:firebase-auth:16.1.0'
implementation 'com.google.firebase:firebase-firestore:18.0.0'
implementation 'com.google.android.gms:play-services-auth:16.0.1'

在頂層build.gradle文件中，請確保具有最新版本的Google服務插件：

classpath 'com.google.gms:google-services:4.2.0'

Answer 2

首先，檢查最新的依賴版本。 可能是您兩次添加此行，這就是為什么gradle無法解決此問題：

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

並將類路徑添加到您的項目級gradle文件中

classpath 'com.google.gms:google-services:4.2.0'