android dynamically add element from layout xml

Question

How can I take the element myButton from this layout xml

Answer 1

Need to ask R.id.mainLayout Linear Layout is in other xml file or the same ?

Answer 2

View view = LayoutInflater.from(context).inflate(R.layout.my_layout);
Button button = (Button) view.findViewById(R.id.myButton);
....
aGroupView.addView(button);