Get access to setText to a view that is not in the default XML layout

Question

I want to .setText to a view that is not in the default XML layout - activity_main.xml.
For a better understanding, I have 2 layout's: activity_main.xml and popup_window.xml.
The TextView is in the popup_window.xml.

Answer 1

use following code:

    LayoutInflater inflater = getLayoutInflater();
    View view = inflater.inflate(R.layout.popup_window, null);
    TextView tv = (TextView)view.findViewById(R.id.yourTextID);
    tv.setText()