title: Android: problems with play-services-ads
body: <p>I'm trying to import an old Eclipse project into Android Studio, in order to show ads.</p>
  <p>Here are the dependencies in build.gradle:</p>
  <pre><code>dependencies {
      implementation 'com.android.support:appcompat-v7:19.+'
      implementation 'com.android.support:support-v4:19.+'
      implementation 'com.google.android.gms:play-services-ads:15.0.0'
  }
  </code></pre>
  <p>But when I try to build the project, the Java compiler gives the following errors:</p>
  <blockquote>
  <p>TextAppearance.Material.Notification not found.</p>
  <p>TextAppearance.Material.Notification.Info not found.</p>
  <p>TextAppearance.Material.Notification.Time not found.</p>
  <p>TextAppearance.Material.Notification.Title not found.</p>
  </blockquote>
  <p>Thanks in advance for suggestions!</p>