title: "All com.android.support libraries must use the exact same version specification" when compiling android.support:appcompat-v7:25.2.0
body: <p>After updating Android Studio to Version 3.1.2 I'm getting an error in my app's build.gradle:</p>
  
  <blockquote>
    <p>All com.android.support libraries must use the exact same version specification (...). Found versions 28.0.0-alpha1, 26.1.0. Examples include com.android.support:asynclayoutinflater:28.0.0-alpha1 and com.android.support:animated-vector-drawable:26.1.0</p>
  </blockquote>
  
  <p>This is my gradle:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 25
      buildToolsVersion '27.0.3'
      defaultConfig {
          applicationId "org.hopto.****.musicplayer"
          minSdkVersion 23
          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-v7:25.2.0'
      compile 'com.android.support:design:25.2.0'
      compile 'com.cleveroad:audiowidget:0.9.0'
      compile 'com.google.android.gms:play-services-ads:10.2.0'
      compile 'com.android.support:recyclerview-v7:+'
      testCompile 'junit:junit:4.12'
  }
  </code></pre>
  
  <p>I've tried solving this by adding the following lines:</p>
  
  <pre><code>compile 'com.android.support:asynclayoutinflater:25.0.0'
  compile 'com.android.support:animated-vector-drawable:25.0.0'
  </code></pre>
  
  <p>I've also tried this with different version, eg 25.2.0 and 25+, but none of this worked.</p>