java.lang.NullPointerException cannot be cast to cn.bmob.v3.exception.BmobException

Question

// BmobException 继承自 Exception
// MyData 继承自 BmobOject
    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.btn_add:
                MyData myData=new MyData();
                myData.setName("小王");
                myData.setSex(男);
                //
                //类型转换异常
                //
                myData.save(new SaveListener<String>() {
                  @Override
                  public void done(String s, BmobException e){
                        if (e==null){
                            LogUtils.i("新增成功"+s);
                    }
                });
                break;

运行时报错闪退，我是一个自学de小白，这种异常的类型转换我没遇到过，请求大家帮帮我呀

Answer 1

异常类型你继承的那个类没有吧，就那个空指针，继承这个试试NullPointerException