how to directy use on click option in xml on android studio

MainActivity.java

    public  int counter=0 ;
    public void  submitOrder(View view){
        counter++;
        displayPri(counter);
         displayQty(counter);
    }
    public void displayPri(int counter){
        int coff=5;
        TextView pri=(TextView)findViewById(R.id.price_text_view);
        counter=5*counter;
        String p=Integer.toString(counter);
        pri.setText("$"+p);
    }
    public void displayQty(int counter){
        TextView qty =(TextView)findViewById(R.id.quantity_text_view);
        String s=Integer.toString(counter);
        qty.setText(s);
    }
}