resize button

WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
        
        Display display = wm.getDefaultDisplay();        
        int btnWidth = display.getWidth() / 2 - 5;                
        
        ViewGroup.LayoutParams params = btnOK.getLayoutParams();
        params.width = btnWidth;        
        btnOK.setLayoutParams(params);
        btnCancel.setLayoutParams(params);