title: Dependency Implementation is not working
body: <p>So the resource symbol "R" doesn't seem to be working in the MainActivity.java file. I did a clean and rebuild on it but still doesn't work.</p>
  
  <p>Then I get an error message on the console. It says that the implementation file in dependencies is not found. How can I correct this?</p>
  
  <p><img src="https://i.stack.imgur.com/jVLsD.png" alt="Console Message"></p>
  
  <p>build.gradle (Project)</p>
  
  <p>// Top-level build file where you can add configuration options common to all sub-projects/modules.</p>
  
  <pre><code>buildscript {
      repositories {
          jcenter()
          google()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:3.1.3'
  
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          jcenter()
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>
  
  <p>build.gradle (Module:app)</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 23
      buildToolsVersion '27.0.3'
  
      defaultConfig {
          applicationId "com.example.android.miwok"
          minSdkVersion 15
          targetSdkVersion 23
          versionCode 1
          versionName "1.0"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  
  dependencies {
      implementation 'com.android.support.constraint:constraint-layout:1.1.2'
      compile fileTree(dir: 'libs', include: ['*.jar'])   
      testCompile 'junit:junit:4.12'  
      compile 'com.android.support:appcompat-v7:23.3.0'   
      compile 'com.android.support:support-v4:23.3.0'
      compile 'com.android.support:design:23.3.0'
  }
  </code></pre>