title: Android studio doesnt recognize some libraries.(import statements)
body: <p>Android studio does not recognize some import statements like</p>
  
  <pre><code>import org.jivesoftware.smack.Chat;
  import org.jivesoftware.smack.ChatManager;  
  </code></pre>
  
  <p>But it recognizes some import statements like </p>
  
  <pre><code>import android.text.TextUtils;
  import android.view.KeyEvent;
  </code></pre>
  
  <p>How can I fix it?</p>