title: error: duplicate value for resource 'attr/actionBarSize' with config ''
body: <p>I'm porting my current android apk to meet recent playstore directive - " targetSdkVersion 26"</p>
  
  <p>This my gradle file. I started  off with compileSdkVersion 26 and ended up at 28. So for 28 I had to use AndroidX dependencies. Im stuck at the error as posted in subject line. Any help would be very much appreciated.</p>
  
  <p>The error message is</p>
  
  <pre><code>AGPBI: {"kind":"error","text":"error: duplicate value for resource \u0027attr/actionBarSize\u0027 with config \u0027\u0027.","sources":[{"file":"/Users/sk/.gradle/caches/transforms-1/files-1.1/appcompat-1.0.0.aar/34c8fa33903fb2b3203e5c70952da588/res/values/values.xml","position":{"startLine":1303,"startColumn":4,"startOffset":70911,"endColumn":68,"endOffset":70975}}],"original":"","tool":"AAPT"}
  AGPBI: {"kind":"error","text":"error: resource previously defined here.","sources":[{"file":"/Users/sk/.gradle/caches/transforms-1/files-1.1/appcompat-1.0.0.aar/34c8fa33903fb2b3203e5c70952da588/res/values/values.xml","position":{"startLine":1303,"startColumn":4,"startOffset":70911,"endColumn":68,"endOffset":70975}}],"original":"","tool":"AAPT"}
  :app:mergeDebugResources
  
      apply plugin: 'com.android.application'
  
      android {
  
      compileSdkVersion 28
      buildToolsVersion "28.0.3"
  
  
      defaultConfig {
          applicationId "pack.age.net"
          minSdkVersion 16
  
          //Since no updates to app can be published in Playstore beginning Nov 1, 2018  - bumping targetSdk to 26 from 19
          targetSdkVersion 26
  
          //Double check this before you move this to production
          versionCode 22
          versionName "3.3"
  
          // Enabling multidex support.
          multiDexEnabled true
  
          //Language resources
          resConfigs "en", "hi"
  
  
  
      }
  
      buildTypes {
          release {
  
              //Shrink your code
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
  
          debug {
              debuggable true
          }
      }
  
      lintOptions {
          checkReleaseBuilds false
      }
  
      packagingOptions {
  
          exclude 'META-INF/LICENSE'
          exclude 'META-INF/NOTICE'
      }
  
      repositories {
          mavenCentral()
  
          maven {
              url "http://dl.bintray.com/journeyapps/maven"
          }
      }
  
  
  
      useLibrary 'org.apache.http.legacy'
  }
  
  dependencies {
      //implementation 'com.android.support:support-v4:28.0.0'
      implementation 'androidx.legacy:legacy-support-v4:1.0.0'
  
  //    implementation 'com.android.support:appcompat-v7:28.0.0'
      implementation 'androidx.appcompat:appcompat:1.0.0'
  
  //    implementation 'com.android.support:design:28.0.0'
      implementation 'com.google.android.material:material:1.0.0'
  
      implementation 'com.google.firebase:firebase-messaging:17.3.4'
      //Hockey App for Crash Analytics
      implementation 'net.hockeyapp.android:HockeySDK:5.1.1'
      //Sundry library files
      implementation files('libs/commons-codec-1.9.jar')
      implementation files('libs/ksoap2-android-assembly-3.6.0-jar-with-dependencies.jar')
      implementation files('libs/libphonenumber-6.2.jar')
      //Mutlidex Support
      implementation 'com.android.support:multidex:1.0.0'
      //Square Picasso Image View
      implementation 'com.squareup.picasso:picasso:2.5.2'
      //Calligraphy for custom fonts
      implementation 'uk.co.chrisjenx:calligraphy:2.2.0'
      implementation 'com.squareup.okhttp3:okhttp:3.10.0'
      testImplementation 'junit:junit:4.12'
      //Apache Commons
      implementation 'org.apache.commons:commons-lang3:3.7'
  
      implementation 'com.github.chrisbanes:PhotoView:2.2.0'
      // Supports Android 4.0.3 and later (API level 15)
      implementation 'com.journeyapps:zxing-android-embedded:2.0.1@aar'
      // Supports Android 2.1 and later (API level 7), but not optimal for later Android versions.
      // If you only plan on supporting Android 4.0.3 and up, you don't need to include this.
      implementation 'com.journeyapps:zxing-android-legacy:2.0.1@aar'
      // Convenience library to launch the scanning and encoding Activities.
      // It automatically picks the best scanning library from the above two, depending on the
      // Android version and what is available.
      implementation 'com.journeyapps:zxing-android-integration:2.0.1@aar'
      // Version 3.0.x of zxing core contains some code that is not compatible on Android 2.2 and earlier.
      // This mostly affects encoding, but you should test if you plan to support these versions.
      // Older versions e.g. 2.2 may also work if you need support for older Android versions.
      implementation 'com.google.zxing:core:3.0.1'
      //Firebase
      implementation 'com.google.firebase:firebase-core:16.0.1'
  }
  
  apply plugin: 'com.google.gms.google-services'
  </code></pre>