In-app purchase, make google play UI transparent

Question

As part of in-app purchasing I am starting an activity provided by the google play service using startIntentSenderForResult() as described in http://developer.android.com/google/play/billing/billing_integrate.html .

How do I make the started activity use a transparent background so my app is visible in the background with the in-app purchasing activity on top of it? The background of the google play activity is grey now.

I have seen that other apps (Babbel, used for learning new languages) use a transparent google play UI and I'm wondering how to do this.

Answer 1

The activity you are starting is a part of google play services. Its not yours to customize. Besides, it's not a good idea to think of customizing it. Its better to have "Similar looking UI perform similar functions" across applications. Showing the default google play payment activity imparts a trust in the user that your payment is handled not by you as an app developer, but by google using their gateway which they know and trust to be secure.