title: Google Cloud Messaging: How to use SHA1 certificate?
body: <p>I have a doubt. I developed an Android App which receives push notifications via Google Cloud Messaging.</p>
  
  <p>Here are the steps I took:</p>
  
  <ol>
  <li>Creation of new Project on Google Developer console and copy/paste my Project Number in my android app.</li>
  <li>Registration of my App through RegID previously received by Google Cloud Messaging. Result: Ok! My App appears in database on my server.</li>
  <li>Copying/paste Api Key in my Server. I obtained my Api Key from Google Developer Console (Projcet/API/Credential/New API Key) creating new API Key without putting any SHA1 certificate.</li>
  </ol>
  
  <p>I exported my application (I use Android Development Tool SDK), created a keystore and apk file. I noticed that when I create a new keystore I receive also a SHA1 certificate (an alpha numeric string like this: 54:B9:D6:B4:....)</p>
  
  <p>Do I have to use this SHA1 code to generate a new API Key from Google Developer Console and use this new Api Key in my Server to send push notifications to my Android App?</p>
  
  <p>In this moment I'm using the API Key generated in step 3 above. Help me to clarify my doubt.</p>