title: Android In-app purchase: how to consume?
body: <p>I've implemented Google In-App Billing V3 in my app and i did my first test purchase. Now, as seen that i want it consumable, but if i click the "Purchase" button again i receive an error, i'm wondering how and where to insert "consumePurchase". I've been all day long on my computer searching on every thread, but i'm making confusion with old versions of the same. From what i saw, i need to call consumePurchase after the successfully purchased item AND when the activity is created, but i can't figure out how to do it.</p>
  
  <p>Is this the one and only line of code?</p>
  
  <pre><code>int response = mService.consumePurchase(3, getPackageName(), token);
  </code></pre>
  
  <p>If so, what is "token"?</p>
  
  <p>P.s. the consumable items are: 50, 150 and 300 coins that the user can buy to take a little advantage in the game.</p>
  
  <p>Aaah, so confusing for me :/ </p>