I have two activities in My application, one being launcher and the other is launched as a explicit call from the first.
Here My problem is when i go back to home sc
Without seeing your code, I think you want something like this answer:
Android finish Activity and start another one
You need to set intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); and you'll also need to finish() your launcher activity as well.
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
finish()