title: Gradle Code having Red Line Under the Code and App not Install On Virtual Or Real Device
body: <p>I am working on an Android App Until I face a problem that App is not able to install after the successful built and When I open my gradle file It shows a red line under the appcompat Implementation.</p>
  
  <p>I am confused how to resolve It since app I am not able to install app on Real Or Virtual Device.</p>
  
  <p>Here is Dependancies in Gradle code</p>
  
  <pre><code>dependencies {
  implementation fileTree(dir: 'libs', include: ['*.jar'])
  **implementation 'com.android.support:appcompat-v7:28.0.0-beta01'**
  implementation 'com.android.support.constraint:constraint-layout:1.1.2'
  implementation 'com.google.firebase:firebase-auth:11.8.0'
  implementation 'com.google.firebase:firebase-database:11.8.0'
  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'
  implementation 'com.android.support:cardview-v7:28.0.0-beta01'
  </code></pre>
  
  <p>}
  <a href="https://i.stack.imgur.com/ZSTck.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZSTck.jpg" alt="Message Under the Line Error"></a></p>