title: unresolved reference bundle android studio
body: <p>I just started to learning kotlin for android studio and built my first project, i did not touched anything but android studio getting me this error:
  unresolved reference bundle, even trying to import android.os.Bundle did not worked.
  at first i was getting the error :
  unresolved reference R, but when i updated kotlin plugin, getting previous error that i already told you about.
  as i said i never touched anything and this files built by android studio itself.
  any ideas ?</p>
  
  <p>this is app level gradle :</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  apply plugin: 'kotlin-android'
  
  apply plugin: 'kotlin-android-extensions'
  
  android {
      compileSdkVersion 28
      defaultConfig {
          applicationId "com.example.deathstroke.samplekotlinproject"
          minSdkVersion 17
          targetSdkVersion 28
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner 
  "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
           release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 
  'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      implementation fileTree(dir: 'libs', include: ['*.jar'])
      implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
      implementation 'com.android.support:appcompat-v7:28.0.0'
      implementation 'com.android.support.constraint:constraint-layout:1.1.3'
      testImplementation 'junit:junit:4.12'
      androidTestImplementation 'com.android.support.test:runner:1.0.2'
      androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
  }
  </code></pre>
  
  <p>and this is project level gradle </p>
  
  <pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  buildscript {
      ext.kotlin_version = '1.3.31'
      repositories {
          google()
          jcenter()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:3.2.1'
          classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
  
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          google()
          jcenter()
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>
  
  <p>and this is main activity class :</p>
  
  <pre><code>package com.example.deathstroke.samplekotlinproject
  
  import android.support.v7.app.AppCompatActivity
  import android.os.bundle;
  
  class MainActivity : AppCompatActivity() {
  
      override fun onCreate(savedInstanceState: android.os.Bundle?) {
          super.onCreate(savedInstanceState)
          setContentView(R.layout.activity_main)
      }
  }
  </code></pre>
  
  <p>android studio showing me Bunlde in red color and alt + Enter dose not have an option as import class...</p>