如何调用Android联系人列表并从其详细信息屏幕中选择一个电话号码？

I have read the already posted solutions, but they dont tell how do I use system's contact details screen to select any ONE number to use? I am developing an sms sending android app which offers to choose contacts of the phone and the number a user wants to use to send to....I have read the already posted solutions, but t