Remove/add Shadow Effect Dynamically

When my button disabled i need remove text shadow effect and when button enable I need add this effect again. selector_btn.xml Copy

write down this method to check enable disable;

     public void  getTextStyle()  {
           if(textstyle.isEnabled()){
                 textstyle.setTextAppearance(this, R.style.TextShadow_enable);
                }
             else{
                   textstyle.setTextAppearance(this, R.style.TextShadow_disable);
                }
          }