I'm doing an app which has an activity with five buttons. I want to implement In-app Billing to "Unlock" 3 of those buttons. For Example: User1 has downloaded and installed my app on his cell phone, but he can only see 2 buttons of the original five buttons, but there is another button named "UNLOCK". If you click that button you will be able to pay $1 to Unlock the rest of the buttons and use their activities.
The problem is I don't know how to do that. I need help with this; hope you can help me.
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