Firebase - 缺少 Api 密钥

我正在使用 Google 的 Firebase 数据库。我已经注册到 Firebase 控制台并下载了 JSON 文件，但由于某种原因它给了我这种错误。

错误：任务“:app:processDebugGoogleServices”执行失败。 缺少 api_key/current_key 对象

好吧，我不知道应该把 api 密钥放在哪里。

这是我的 gradle（模块应用程序）

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

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

defaultConfig {
    applicationId "com.udacity.firebase.shoppinglistplusplus"
    minSdkVersion 15
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        it.buildConfigField 'String','UNIQUE_FIREBASE_ROOT_URL', UniqueFirebaseRootUrl
    }
    debug {
    }
}

/* This for anyone following along with the repo. Since you will have a different
 * root URL, this code loads up a value from your gradle.properties file.
 */

buildTypes.each {
    it.buildConfigField 'String', 'UNIQUE_FIREBASE_ROOT_URL', UniqueFirebaseRootUrl
}

packagingOptions {
    exclude 'META-INF/LICENSE'
    exclude 'META-INF/LICENSE-FIREBASE.txt'
    exclude 'META-INF/NOTICE'
}

 }

 dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.0.1'
    compile 'com.android.support:design:23.0.1'
    compile 'com.android.support:support-v4:23.0.1'
    compile 'com.android.support:cardview-v7:23.0.1'

/* Firebase SDK */
compile 'com.firebase:firebase-client-android:2.4.0'

/* Firebase UI */
compile 'com.firebaseui:firebase-ui:0.2.2'

/* For Google Play Services */
compile 'com.google.android.gms:play-services-safetynet:9.0.0'
compile 'com.google.android.gms:play-services-auth:9.0.0'

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

这是 gradle（项目）

   // 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:1.3.1'
       classpath 'com.google.gms:google-services:3.0.0'

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

  allprojects {
     repositories {
      jcenter()
      }
  }

如果缺少某些内容，请告诉我

你应该把google-services.json in the app/目录

请参阅文档：https://firebase.google.com/docs/android/setup#add_firebase_to_your_app https://firebase.google.com/docs/android/setup#add_firebase_to_your_app