这是因为，除非在适配器类中声明了名为getIntent()的函数，否则在适配器类中getIntent()不可用.在适配器中添加一个函数以接收适配器中的数据，然后调用notifyDataSetChanged()刷新列表.例如:

That is because getIntent() is not available in adapter class unless you declare a function named getIntent() in it. Add a function in the adapter to receive the data in the adapter and call notifyDataSetChanged() to refresh the list. for example:

class DataAdapter extends ArrayAdapter<String> {

    private ArrayList<String> items = new ArrayList<>();

    public DataAdapter(@NonNull Context context, @LayoutRes int resource) {
        super(context, resource);
    }


    public void setItems(ArrayList<String> items) {
        this.items = items;
        notifyDataSetChanged();
    }
    //some more code
}

在您的活动中创建适配器的实例，并将其绑定到列表/旋转器，然后调用该函数以在适配器中添加数据.

in your activity create an instance of the adapter and bind it to the list/spinner and then call the function to add data in the adapter.