title: Chromecast Sample Project not casting on tv
body: <p>I am new for chromecast and trying to run the sample master app present on git hub.</p>
  
  <p>I have followed all the steps... </p>
  
  <p>1)import google cast sdk 
  2)import both libraries... appcompat, mediarouter
       Used these as libraries in the sample project.
  but having confusion.
  I want to work only on sender app</p>
  
  <p>1)whats the app id in the sample.
  2)If I run the project it compiles and run without errors but not casting anything on Tv.</p>
  
  <p>I am simply running the Github project.</p>
  
  <p>Kindly help me. </p>