[Solved] how to know which button is clicked ” first”” [closed]

Question

public void updateDisplay(View v){
    s1=(String) ((Button)v).getTag();
    ss.add(s1);
    System.out.println("nos are**********"+ss);
}

set some tag to the corresponding buttons

Accepted Answer

public void updateDisplay(View v){
    s1=(String) ((Button)v).getTag();
    ss.add(s1);
    System.out.println("nos are**********"+ss);
}

set some tag to the corresponding buttons