title: All packages are not available for download error in android
body: <p><a href="http://i.stack.imgur.com/RAffF.png" rel="noreferrer">All packages are not available for download!</a>
    The following packages are not available:
  - Package id sources;android-24</p>
  
  <p>Am trying getting data from database by using of web services, when am running the application getting an above shown error.</p>
  
  <p>How can I resolve this issue in the android studio?</p>