Java 获取对基本适配器中微调器的引用

我有一个BaseAdapter，我已经扩展它来处理一些对象（微调器、切换视图等等）。我正在尝试从微调器获取选定的值。我的问题是getSelectedItem（）总是返回第一个值（索引0）。不知道我错过了什么。这是我的密码

GridView grid=(GridView)findViewById(R.id.grdMain);
AcmObjectBaseAdaptor ad = (AcmObjectBaseAdaptor) grid.getAdapter();
String year = "";
if (ad.getItem(0) instanceof Spinner){
    Spinner spinner = (Spinner) ad.getItem(0);
    year = spinner.getSelectedItem().toString();
    System.out.println("Selected: " + year);
}

---

如果将mselectedListener添加到微调器中，会怎么样

spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
         System.out.println("onItemSelected: " + position);
    }

    @Override
    public void onNothingSelected(AdapterView<?> parentView) {}
});

spinner.setOnItemSelectedListener（新的OnItemSelectedListener（）{
@凌驾
已选择公共视图（AdapterView父视图、视图selectedItemView、整型位置、长id）{
System.out.println（“选中：+位置”）；
}
@凌驾
未选择的公共无效（AdapterView父视图）{}
});

如果在微调器中添加并删除SelectedListener，该怎么办

spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
         System.out.println("onItemSelected: " + position);
    }

    @Override
    public void onNothingSelected(AdapterView<?> parentView) {}
});

spinner.setOnItemSelectedListener（新的OnItemSelectedListener（）{
@凌驾
已选择公共视图（AdapterView父视图、视图selectedItemView、整型位置、长id）{
System.out.println（“选中：+位置”）；
}
@凌驾
未选择的公共无效（AdapterView父视图）{}
});