title: Android GCM- Manifest File and Registration
body: <p>I implemented a project with GCM before. I want to create a new project now, I need a new project id and i got it but now i can not register. Is it about project id? or Can i use previous project id?</p>
  
  <p>And last question:</p>
  
  <pre><code>&lt;category android:name="my_app_package" /&gt;   
  
  &lt;permission android:name="my_app_package.permission.C2D_MESSAGE" android:protectionLevel="signature" /&gt;
  &lt;uses-permission android:name="my_app_package.permission.C2D_MESSAGE" /&gt;
  </code></pre>
  
  <p>What is app package name? is it at the top of the manifest file? or is it that includes GCM java pages?</p>