Android 手机号码隐藏中间四位功能

public static String hidePhone (Context context, String phone){

        if (!TextUtils.isEmpty(phone) && phone.length() ==11) {

                phone = phone.substring(0,3) +"****" + phone.substring(7,11);

        }else{

                Toast.makeText(context,"手机号格式不正确", Toast.LENGTH_SHORT).show();

        }

        return phone;

}