title: Problem with the Gradle files. I have already connected the project to Firebase and now I am trying to add Google map
body: <p>My project is connected to Firebase (Database) and now I am tring to add Google map. When I add one of the dependencies I get an error message while the sync.
  It says something about using different version etc.</p>
  
  <p>HELP !!</p>
  
  <p>Description:</p>
  
  <p>After I added this line to the app gradle file:</p>
  
  <pre><code>implementation 'com.google.android.gms:play-services-maps:16.0.0'
  </code></pre>
  
  <p>I got this error:</p>
  
  <pre><code>The library com.google.android.gms:play-services-base is being requested by various other libraries at [[15.0.1,15.0.1]], but resolves to 16.0.1. Disable the plugin and check your dependencies tree using ./gradlew :app:dependencies.
  </code></pre>
  
  <p>with out the line that I have added everything is fine.</p>
  
  <p>app gradle code:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  apply plugin: 'com.google.gms.google-services'
  
  android {
  compileSdkVersion 28
  defaultConfig {
      applicationId "com.example.rotem.bepart_appproject"
      minSdkVersion 23
      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(include: ['*.jar'], dir: 'libs')
  implementation 'com.android.support:appcompat-v7:28.0.0'
  implementation 'com.android.support.constraint:constraint-layout:1.1.3'
  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'
  implementation 'com.google.firebase:firebase-database:16.0.1'
  implementation 'com.android.support:design:28.0.0'
  implementation 'com.google.firebase:firebase-storage:16.0.1'
  implementation 'com.google.firebase:firebase-core:16.0.1'
  
  **implementation 'com.google.android.gms:play-services-maps:16.0.0'**
  
  }
  </code></pre>
  
  <p>my project gradle file:</p>
  
  <pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  buildscript {
  
  repositories {
      google()
      jcenter()
  }
  dependencies {
      classpath 'com.android.tools.build:gradle:3.2.1'
      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
  }    
  </code></pre>
  
  <p>}</p>
  
  <pre><code>allprojects {
      repositories {
      google()
      jcenter()
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
       }
  </code></pre>