title: User input to subscribe to a parse channel
body: <p>I need a way for the users to subscribe for certain channels. I used the example in the installation example on parse <code>.com</code> to create a channel. </p>
  
  <pre><code>PushService.subscribe(context"Giants",MainActivity.class); 
  </code></pre>
  
  <p>Now that the channel is created I need a way for the user to select if they want to subscribe to the channel. </p>
  
  <p>Can anyone help?</p>