title: E/dalvikvm: Could not find class 'android.util.ArrayMap'
body: <p>When I run my app on emulator, Android Studio shows this error: </p>
  
  <blockquote>
    <p>E/dalvikvm: Could not find class 'android.util.ArrayMap', referenced
    from method com.android.tools.fd.runtime.Restarter.getActivities</p>
  </blockquote>
  
  <p>How can I solve that?</p>