title: appcompat-v7:27.1.1 conflicts with play-services:11.0.1
body: <p>I am working on a new app. Presently I am trying to add dependency.</p>
  
  <pre><code>implementation 'com.google.android.gms:play-services:11.0.1'
  </code></pre>
  
  <p>When I do I get a gradle compile error on implementation 'com.android.support:appcompat-v7:27.1.1' saying:</p>
  
  <p>All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 27.1.1, 26.1.0. Examples include com.android.support:animated-vector-drawable:27.1.1 and com.android.support:mediarouter-v7:26.1.0</p>
  
  <p>Any ideas how to best resolve this issue?</p>
  
  <p>Gradle file</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 27
      defaultConfig {
          applicationId "com.example.boulbabazitouni.getdevicelocation_time"
          minSdkVersion 21
          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(include: ['*.jar'], dir: 'libs')
      implementation 'com.android.support:appcompat-v7:27.1.1'
      implementation 'com.android.support:support-vector-drawable:27.1.1'
      implementation 'com.android.support:mediarouter-v7:27.1.1'
      implementation 'com.android.support.constraint:constraint-layout:1.1.0'
      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.android.gms:play-services:11.0.1'
  }
  </code></pre>