title: Android Studio v7- Import errors for few classes (Cannot resolve symbol)
body: <p>I am a beginner to Android Programming. I am trying to create a basic Hello World App using Android Studio. I am getting following errors in Java File immediately after following the initial steps to create the Hello World Program.</p>
  
  <pre><code>"Cannot resolve Symbol FloatingActionButton"
  "Cannot resolve Symbol Snackbar"
  "Cannot resolve Symbol AppCompatActivity"
  "Cannot resolve Symbol Toolbar"
  </code></pre>
  
  <p>As you can see in the attached <a href="http://i.stack.imgur.com/02PwS.png" rel="noreferrer">Image</a> the errors are in red.
  Please help me out here. </p>
  
  <p>My build file content:</p>
  
  <pre><code> defaultConfig {
          applicationId "com.example.helloworld.helloworld"
          minSdkVersion 15
          targetSdkVersion 23
          versionCode 1
          versionName "1.0"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:design:23.0.1'
      compile 'com.android.support:appcompat-v7:23.0.1'
      compile 'com.android.support:design:23.0.1'
  }
  </code></pre>
  
  <p>Seems like I have added all the relevant dependencies.</p>