Now, I want to develop a Android app with using Skype voip service.
This app have keypad to input skype ID, and make call to that.
But at that time it will show skype call screen replace my app screen.
I want to make a skype to skype call on my app, but show my app screen and hide skype call screen. Is that possible?
That is SDK i used
No, it is not possible using Skype ids. Instead you will have to create your own server or other backend and create an app that manages all the video calling.