title: Gradle sync failed - Failed to resolve: appcompat-v7:26
body: <p>I use this code in my app/build.gradle.</p>
  
  <pre><code>  android {
          compileSdkVersion 26
          defaultConfig {
              applicationId "com.avizhegroup.android.dsmmaps"
              minSdkVersion 21
              targetSdkVersion 26
              versionCode 2
              versionName "1.1"
              testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
          }
          buildTypes {
              release {
                  minifyEnabled false
                  proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
              }
          }
          useLibrary 'org.apache.http.legacy'
      }
  
  
  
  repositories {
          maven {
              url "https://jitpack.io"
          }
      }
  
  dependencies {
      implementation fileTree(include: ['*.jar'], dir: 'libs')
      androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
          exclude group: 'com.android.support', module: 'support-annotations'
      })
      annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
      implementation 'com.android.support:appcompat-v7:26.1.0'
      implementation 'com.android.support.constraint:constraint-layout:1.1.3'
      implementation 'com.android.support:design:26.1.0'
      implementation 'com.google.android.gms:play-services-maps:11.0.4'
      implementation 'com.android.volley:volley:1.1.0'
      implementation 'uk.co.chrisjenx:calligraphy:2.3.0'
      implementation 'com.github.zookey:universalpreferences:0.0.4'
      implementation 'com.google.android.gms:play-services-location:11.0.4'
      implementation 'com.jakewharton:butterknife:8.8.1'
      implementation 'com.github.bosphere.android-filelogger:filelogger:1.0.3'
      implementation 'com.afollestad.material-dialogs:core:0.9.6.0'
      implementation 'com.orhanobut:logger:2.2.0'
      implementation 'com.orhanobut:logger:2.1.1'
      implementation 'com.orhanobut:dialogplus:1.11@aar'
      implementation files('libs/usbdriver.jar')
      implementation files('src/main/libs/rlmotgusbdriver.jar')
      implementation 'me.imid.swipebacklayout.lib:library:1.1.0'
      implementation 'com.felipecsl.asymmetricgridview:library:2.0.1'
      implementation 'com.readystatesoftware.sqliteasset:sqliteassethelper:+'
  }
  </code></pre>
  
  <p>I have a problem when syncing Gradle. these problems have occurred:</p>
  
  <blockquote>
    <p>ERROR: Failed to resolve: design<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: appcompat-v7<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: transition<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: recyclerview-v7<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: support-v4<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: support-media-compat<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: animated-vector-drawable<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: support-vector-drawable<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: support-fragment<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: support-core-utils<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: support-core-ui<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: support-compat<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: support-annotations<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: runtime<br>
        Affected Modules: app<br>
        ERROR: Failed to resolve: common<br>
        Affected Modules: app  </p>
  </blockquote>
  
  <p>I uncheck variant in Experimental in preferences, change dependencies, change SDK version, change grade version and ... . this code works in windows, but in Mac doesn't.<br>
  I use constraint-layout and AndroidStudio3.3.2<br>
  How can I correct this?<br>
  Thanks  </p>