Question

我实现了一个自定义列表视图，其中包含自定义列表项，其中包含微调框和文本框。我想在列表视图的列表项中使用onItemSelected()保存微调器的选定值，但我不知道找到一个包含用户正在处理的微调器的列表项。我怎么能得到这个，有人可以帮忙吗？

以下是列表视图适配器中的代码。

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View listItemView = convertView;

    if (listItemView == null) {
        listItemView = inflater.inflate(R.layout.listitem, null);
        ViewHolder viewHolder = new ViewHolder();
        viewHolder.view1 = (Spinner) listItemView.findViewById(R.id.view1);
        viewHolder.view2 = (TextView) listItemView.findViewById(R.id.view2);

        viewHolder.view1.setFocusable(false);
        viewHolder.view2.setFocusable(false);

        viewHolder.view1.setAdapter(view1Adapter);
        viewHolder.view1.setPrompt("Select");
        viewHolder.view1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                String selectedId = spinnerItemList.get(position).id;
                // todo : need to find a way to get list item of list view, which has this spinner, like the position of getView().
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });

        listItemView.setTag(viewHolder);
    }

    CustomListItem item = listViewItemList.get(position);
    ViewHolder viewHolder = listItemView.getTag();
    viewHolder.view1.setSelection(item.view1Value);
    viewHolder.view2.setText(String.valueOf(item.view2Value));

    return listItemView;
}

Answer 1

如果要处理适配器内微调器的onItemSelected，请尝试：

//将activity / fragment的上下文传递给适配器

context.saveSelectedValue(selectedId);

//将所选内容保存在activity / fragment

中

public void saveSelectedValue(String id){
   //code to save
}

Answer 2

我发布了我已经找到的答案给那些与我有同样问题的人。实际上我从Loc的回答中看到了这个想法，但他以某种方式删除了他的回答。也许这个解决方案可能存在严重问题。无论如何，这对我来说很有用。

我使用setTag（）和getTag（）来获取CustomListItem。请参阅以下代码。

@Override
public View getView(int position, View convertView, ViewGroup parent) {
  View listItemView = convertView;

  if (listItemView == null) {
    listItemView = inflater.inflate(R.layout.listitem, null);
    ViewHolder viewHolder = new ViewHolder();
    viewHolder.view1 = (Spinner) listItemView.findViewById(R.id.view1);
    viewHolder.view2 = (TextView) listItemView.findViewById(R.id.view2);

    viewHolder.view1.setFocusable(false);
    viewHolder.view2.setFocusable(false);

    viewHolder.view1.setAdapter(view1Adapter);
    viewHolder.view1.setPrompt("Select");
    viewHolder.view1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            String selectedId = spinnerItemList.get(position).id;
            // todo : need to find a way to get list item of list view, which has this spinner, like the position of getView().
            CustomListItem item = (CustomListItem)parent.getTag();
            item.view1Value = selectedId;
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });

    listItemView.setTag(viewHolder);
  }

  CustomListItem item = listViewItemList.get(position);
  ViewHolder viewHolder = listItemView.getTag();
  viewHolder.view1.setSelection(item.view1Value);
  viewHolder.view.setTag(item);
  viewHolder.view2.setText(String.valueOf(item.view2Value));

  return listItemView;
}

具有自定义列表项的自定义列表视图，其中包含Spinner

2 个答案: