title: Google Cloud Vision API Permission Denied
body: <p>I was trying to run the sample app, found here <a href="https://github.com/Batzee/cloud-vision/tree/master/android" rel="noreferrer">Github Sample</a>, I have created a certificate and created a API Key and applied as instructed. But when I upload the Image I am getting this Exception. I dont know where I have made a mistake. Have I missed anything?</p>
  
  <pre><code>failed to make API request because {
      "code": 403,
      "errors": [{
          "domain": "global",
          "message": "Requests from this Android client application &lt;empty&gt; are blocked.",
          "reason": "forbidden"
      }],
      "message": "Requests from this Android client application &lt;empty&gt; are blocked.",
      "status": "PERMISSION_DENIED"
  }
  </code></pre>