You need a View.OnClickListener<http://developer.android.com/reference/android/view/View.OnClickListener.html> that queries the database depending on the Button<http://developer.android.com/reference/android/widget/Button.html> it's attached to. The SQL part is pretty obvious. Once you have the record, you update the interface, and this really depends on the kind of record and the view that display it. For example if it's a TextView you can simpy change the text. If you want you can use a ViewSwitcher<http://developer.android.com/reference/android/widget/ViewSwitcher.html> to add nice animation.
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