Android :: Set Up Button In Main.xml

if I set up a button in main.xml, I still need to actually create the button in my Activity, right? Like the XML just controls the look of the button, but you need to actually create a button by doing something like

private Button myButton; Just wanted to make sure I had this clear conceptually. You create an object in your class and then just tell Android to do something like myButton = (Button) findViewById(R.id.my_button);