title: Android Gradle Sync failed could not find support-core-ui.aar
body: <p>I've been working on this Android Project for about a year now, suddenly when I opened it yesterday Android Studio 3.1.2 failed to sync gradle and the project doesn't build anymore giving me this error:</p>
  
  <pre><code>Could not find support-core-ui.jar (com.android.support:support-core-ui:27.1.1).
      Searched in the following locations:
          https://jcenter.bintray.com/com/android/support/support-core-ui/27.1.1/support-core-ui-27.1.1.jar
  
      Please install the Android Support Repository from the Android SDK Manager.
      Open Android SDK Manager
  </code></pre>
  
  <p>I'm pretty sure that the Android Support Repository is installed correctly because it's working successfully in other projects and all my other projects are working fine with no problems.</p>
  
  <p>I have this gradle file in the app module:</p>
  
  <pre><code>buildscript {
      repositories {
          maven { url 'https://maven.fabric.io/public' }
      }
      dependencies {
          classpath 'io.fabric.tools:gradle:1.21.5'
      }
  }
  plugins {
      id 'com.onesignal.androidsdk.onesignal-gradle-plugin' version '0.8.1'
  }
  apply plugin: 'com.onesignal.androidsdk.onesignal-gradle-plugin'
  apply plugin: 'com.android.application'
  apply plugin: 'io.fabric'
  apply plugin: 'com.neenbedankt.android-apt'
  apply plugin: 'realm-android'
  
  android {
      compileSdkVersion 27
      buildToolsVersion "27.0.3"
  
      defaultConfig {
          minSdkVersion 16
          targetSdkVersion 23
          versionCode 32
          versionName "3.1"
  
          multiDexEnabled true
  
          manifestPlaceholders = [onesignal_app_id               : "",
                                  // Project number pulled from dashboard, local value is ignored.
                                  onesignal_google_project_number: "REMOTE"]
  
      }
  
      configurations {
          all*.exclude group: 'com.android.support', module: 'support-v4'
      }
  
      configurations.all {
          resolutionStrategy.eachDependency { DependencyResolveDetails details -&gt;
              def requested = details.requested
              if (requested.group == 'com.android.support') {
                  if (!requested.name.startsWith("multidex")) {
                      details.useVersion '27.1.1'
                  }
              }
              if (requested.group == 'com.google.android.gms') {
                  details.useVersion '15.0.1'
              }
              if (requested.group == 'com.google.firebase') {
                  details.useVersion '15.0.1'
              }
          }
      }
  
      buildTypes {
          release {
              minifyEnabled false
  //            proguardFiles 'proguard.cfg'
          }
      }
  
      useLibrary 'org.apache.http.legacy'
      packagingOptions {
          exclude 'META-INF/LICENSE'
          exclude 'META-INF/LICENSE.txt'
          exclude 'META-INF/NOTICE.txt'
          exclude 'META-INF/DEPENDENCIES'
      }
  }
  
  repositories {
      maven {
          url "https://jitpack.io"
      }
      maven {
          url  "https://dl.bintray.com/lukaville/maven"
      }
      maven { url 'https://maven.fabric.io/public' }
      maven { url 'https://maven.google.com' }
      mavenCentral()
  }
  
  dependencies {
      compile project(':FORTSDKv1.4.1')
      compile files('libs/nineoldandroids-2.4.0.jar')
      compile files('libs/gcm.jar')
      compile files('libs/httpclient-4.3.4.jar')
      compile files('libs/httpmime-4.2.5.jar')
      compile files('libs/HockeySDK-3.0.2.jar')
      compile files('libs/samsungpay-1.8.00.jar')
      compile project(':library-2.4.1')
      // Required for geotagging
      compile('com.crashlytics.sdk.android:crashlytics:2.6.8@aar') {
          transitive = true
      }
      compile('com.code-troopers.betterpickers:library:3.1.0') {
          exclude group: 'com.nineoldandroids', module: 'library'
      }
      compile 'com.android.support:support-v4:27.0.0'
      // https://mvnrepository.com/artifact/com.android.support/support-core-ui
      compile group: 'com.android.support', name: 'support-core-ui', version: '27.1.1'
      compile 'com.android.support:appcompat-v7:27.0.0'
      compile 'com.android.support:cardview-v7:27.0.0'
      compile 'com.android.support:customtabs:27.0.0'
      compile 'com.android.support:multidex:1.0.3'
      compile 'com.googlecode.libphonenumber:libphonenumber:8.8.9'
      compile 'org.parceler:parceler-api:1.1.5'
      compile('com.google.android.gms:play-services-analytics:11.8.0') {
          exclude group: 'com.android.support', module: 'support-v4'
      }
      compile 'com.google.android.gms:play-services-maps:15.0.1'
      compile 'com.google.android.gms:play-services-auth:15.0.1'
      compile 'com.google.android.gms:play-services-gcm:15.0.1'
      compile 'com.google.android.gms:play-services-location:15.0.1'
      //    compile 'com.google.android.gms:play-services-analytics:11.8.0'
      compile 'com.github.hackware1993:MagicIndicator:1.5.0'
      compile 'com.roomorama:caldroid:2.3.1'
      compile 'com.google.code.gson:gson:2.8.1'
      compile 'com.leocardz:aelv:1.1@aar'
      compile 'com.flaviofaria:kenburnsview:1.0.7'
      compile('com.jakewharton:butterknife:8.4.0') {
          exclude module: 'support-compat'
          exclude group: 'com.google.android', module: 'support-v4'
      }
      compile 'com.pixplicity.easyprefs:library:1.8.1@aar'
      compile 'de.hdodenhof:circleimageview:2.2.0'
      compile 'com.github.jrvansuita:IconHandler:+'
      compile 'com.github.mancj:SlideUp-Android:2.2.5'
      compile 'com.afollestad:sectioned-recyclerview:0.5.0'
      compile 'com.github.bumptech.glide:glide:3.7.0'
      compile 'com.facebook.stetho:stetho:1.4.1'
      compile 'com.facebook.stetho:stetho-okhttp3:1.4.1'
      compile 'com.uphyca:stetho_realm:2.0.0'
      compile 'org.greenrobot:eventbus:3.1.1'
      compile 'com.birbit:android-priority-jobqueue:2.0.1'
      compile 'com.squareup.retrofit2:retrofit:2.3.0'
      compile 'com.squareup.retrofit2:converter-gson:2.1.0'
      compile 'com.squareup.retrofit2:converter-scalars:2.1.0'
      compile 'com.valdesekamdem.library:md-toast:0.8.0'
      compile 'com.facebook.android:account-kit-sdk:4.30.0'
      compile 'com.facebook.android:facebook-android-sdk:4.17.0'
      compile 'com.wang.avi:library:2.1.3@aar'
      compile 'com.afollestad.material-dialogs:core:0.9.6.0'
      //    compile 'com.onesignal:OneSignal:3.6.5'
      compile 'com.onesignal:OneSignal:[3.9.1, 3.99.99]'
      compile 'com.kbeanie:image-chooser-library:1.6.0@aar'
      compile 'com.squareup.picasso:picasso:2.5.2'
      compile 'com.scalified:fab:1.1.3'
      compile 'com.github.traex.expandablelayout:library:1.2.2'
      compile 'com.github.markomilos:paginate:0.5.1'
      compile 'com.wdullaer:materialdatetimepicker:3.3.0'
      compile 'com.github.tamir7.contacts:contacts:1.1.7'
      compile 'com.android.support.constraint:constraint-layout:1.0.2'
      compile 'net.yslibrary.keyboardvisibilityevent:keyboardvisibilityevent:2.1.0'
      compile 'com.github.livechat:chat-window-android:v2.0.0'
      compile 'com.uber.sdk:rides-android:0.6.1'
      compile 'link.fls:swipestack:0.3.0'
      compile 'com.github.PhilJay:MPAndroidChart:v3.0.2'
      compile 'com.victor:lib:1.0.1'
      compile 'com.shamanland:fonticon:0.1.8'
      compile 'jp.wasabeef:recyclerview-animators:2.2.7'
      compile 'com.squareup.okhttp3:logging-interceptor:3.8.0'
      compile 'com.github.vihtarb:tooltip:0.1.9'
      compile 'com.daasuu:CountAnimationTextView:0.1.1'
      compile 'com.theartofdev.edmodo:android-image-cropper:2.5.1'
      compile('com.android.billingclient:billing:1.0') {
          exclude module: 'support-compat'
          exclude group: 'com.google.android', module: 'support-v4'
      }
      compile('de.keyboardsurfer.android.widget:crouton:1.8.5@aar') {
          // exclusion is not necessary, but generally a good idea.
          exclude group: 'com.google.android', module: 'support-v4'
      }
      compile 'com.nbsp:library:1.8'
      apt 'com.jakewharton:butterknife-compiler:8.8.1'
      apt 'org.parceler:parceler:1.1.5'
      compile 'com.google.guava:guava:19.0'
      compile 'org.bouncycastle:bcprov-jdk16:1.46'
  }
  
  
  apply plugin: 'com.google.gms.google-services'
  </code></pre>
  
  <p>Any suggestions or solutions are very appreciated. Thanks.</p>