title: android manifest giving error only for activity
body: <p>I am developing a project on face recognition in android. But my androidmanifest file is having errors. The errors are only for the activities that i have created. It says that cannot resolve the symbol (activity_name).<a href="http://i.stack.imgur.com/IZQRh.png" rel="nofollow">This is the snapshot of my manifest file.</a> I have tried cleaning up the project and cache but nothing works out. Also it showing "Cannot resolve symbol R" in all the places where i have used it(say R.Layout.Activity_main).</p>