android - 无法解析 : com. google.firebase :firebase-core:16. 0.0

Question

我有安卓项目我想使用 google firebase 向该应用添加推送通知首先，我下载了 xml 文件并将其粘贴到应用程序根目录，然后我按照他们在此链接上所说的那样添加了这些行

buildscript {
  dependencies {
    // Add this line
    classpath 'com.google.gms:google-services:4.0.0'
  }
}
    dependencies {
  // Add this line
  compile 'com.google.firebase:firebase-core:16.0.0'
}
...
// Add to the bottom of the file
apply plugin: 'com.google.gms.google-services'

我现在点击同步总是报这个错误

failed to resolve: com.google.firebase:firebase-core:16.0.0

感谢帮助这是完整的 gradle 文件

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "28.0.0"
    defaultConfig {
        applicationId "com.softya.demo"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.android.support:support-v4:25.3.1'
    testCompile 'junit:junit:4.12'
    compile 'com.google.firebase:firebase-core:16.0.0'
}
apply plugin: 'com.google.gms.google-services'

这是gradle文件代码

    // Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.0'
        classpath 'com.google.gms:google-services:4.0.0'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Answer 1

我注意到您需要更新很多脚本。

例如，让我们从您的顶级 build.gradle 开始。您不应再使用 android gradle plugin 2.+，而应使用 3.1.x 版本

为此，您应该将 google() 放入您的存储库中。

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
   repositories {
      jcenter()
      //Add this line
      google()
   }
   dependencies {
      //Please update it to 3.1.x
      classpath 'com.android.tools.build:gradle:3.1.2'
      //Update to the latest version as well
      classpath 'com.google.gms:google-services:4.0.1'
      // NOTE: Do not place your application dependencies here; they belong
      // in the individual module build.gradle files
   }
}

一些提示:

尝试更新您的应用级 build.gradle，从 compile 到 implementation，因为它们很快就会被弃用。