title: Eclipse - No project visible in explorer
body: <p>I am using <code>Eclipse Helios 3.6.2</code> for android development. Today when I opened eclipse these is no projects visible in <code>package explorer.</code> Even though projects folders are present in directory. What can be reason for it? Is it missing some config file. How to make all projects in workspace visible again in explorer of eclipse.</p>
  
  <p>Thanks</p>