title: error: supertypes of the following classes cannot be resolved. Please make sure you have the required dependencies in the classpath
body: <p>I can't compile my Android Kotlin project.</p>
  
  <p>I have no idea what is this...</p>
  
  <p><strong>Gradle log:</strong></p>
  
  <p>error: supertypes of the following classes cannot be resolved. Please make sure you have the required dependencies in the classpath:
  class android.support.v7.app.AppCompatActivity, unresolved supertypes: SupportParentable</p>
  
  <p><strong>build.gradle (app)</strong></p>
  
  <pre><code>buildscript {
      ext.android_plugin_version = "2.3.3"
      ext.kotlin_version = '1.1.2-5'
  
      repositories {
          maven { url 'https://maven.google.com' }
          maven { url "https://jitpack.io" }
  
          mavenCentral()
      }
  
      dependencies {
          classpath "com.android.tools.build:gradle:$android_plugin_version"
          classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
      }
  }
  
  allprojects {
      repositories {
          maven { url 'https://maven.google.com' }
          maven { url "https://jitpack.io" }
  
          mavenCentral()
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  
  apply plugin: 'com.android.application'
  apply plugin: 'kotlin-android'
  apply plugin: 'kotlin-android-extensions'
  apply plugin: 'kotlin-kapt'
  
  def compat_version = '26.+'
  def play_services_version = '11.0.1'
  def firebase_version = '9.6.1'
  
  android {
      compileSdkVersion 26
      buildToolsVersion "26.0.0"
  
      defaultConfig {
          applicationId "com.site.app"
          minSdkVersion 19
          targetSdkVersion 26
          versionCode 1
          versionName "1.0.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  
          javaCompileOptions {
              annotationProcessorOptions {
                  arguments = ["library" : "true"]
              }
          }
      }
  
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  
      dexOptions {
          javaMaxHeapSize "4g"
      }
  
      dataBinding {
          enabled true
      }
  
      sourceSets {
          main.java.srcDirs += 'src/main/kotlin'
      }
  
      compileOptions {
          sourceCompatibility JavaVersion.VERSION_1_7
          targetCompatibility JavaVersion.VERSION_1_7
      }
  }
  
  kapt {
      generateStubs = true
      correctErrorTypes = true
  }
  
  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'
      })
      testCompile 'junit:junit:4.12'
  
      // android
      compile 'com.android.support:multidex:1.0.1'
      compile "com.android.support:appcompat-v7:${compat_version}"
      compile "com.android.support:design:${compat_version}"
      compile "com.android.support:cardview-v7:${compat_version}"
      compile "com.android.support:recyclerview-v7:${compat_version}"
      compile "com.android.support:gridlayout-v7:${compat_version}"
      compile "com.google.android.gms:play-services:${play_services_version}"
      compile "com.google.android.gms:play-services-ads:${play_services_version}"
      compile "com.google.android.gms:play-services-maps:${play_services_version}"
      compile 'com.android.support.constraint:constraint-layout:1.0.2'
      compile 'com.google.maps.android:android-maps-utils:0.4+'
      kapt "com.android.databinding:compiler:$android_plugin_version"
  
      // kotlin
      compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
      compile "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
      testCompile "org.jetbrains.kotlin:kotlin-test:$kotlin_version"
      testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
  }
  </code></pre>