c# - 如何选中单选按钮以及如何仅控制 ListView 中选中的一个单选按钮

Question

我试图将我的数据添加到 ListView 中。我正在使用适配器。在 ListView 中有单选按钮和一些字段。

class StocktakeEditViewAdaptor : BaseAdapter<Model.FileRecord>
{
private Dictionary<int, bool> checkDictionary = new Dictionary<int, bool>();



public override View GetView(int position, View convertView, ViewGroup parent)
    {
        var item = items[position];
        View view = convertView;

        //if (view == null)
        {
            view = context.LayoutInflater.Inflate(Resource.Layout.StockTakeEditDetailList, null);
            view.DuplicateParentStateEnabled = true;


            createdview.Add(view);
            RadioButton lblradio = view.FindViewById<RadioButton>(Resource.Id.lblradio);
            lblradio.Tag = item.FileRecord_ID + ":" + item.ST_filename + ":" + item.ST_BinLoc;
lblradio.Checked = checkDictionary[position];   //add position here
            lblradio.SetOnCheckedChangeListener(null);
            lblradio.SetOnCheckedChangeListener(new CheckedChangeListener(this.context));

            view.FindViewById<TextView>(Resource.Id.txtLineNo).Text = item.FileRecord_ID.ToString();  //my field in adapter.
            view.FindViewById<TextView>(Resource.Id.txtbinloc).Text = item.ST_BinLoc.ToString();
            view.FindViewById<TextView>(Resource.Id.txtBarcodett).Text = item.ST_Barcode.ToString();
            view.FindViewById<TextView>(Resource.Id.txtQtytt).Text = item.ST_Qty.ToString();


            if (!view.HasOnClickListeners)
                view.Click += View_LongClick;
            view.RefreshDrawableState();
        }
        return view;
    }

        public void OnCheckedChanged(CompoundButton buttonView, bool isChecked)
        {
            for (int i = 0; i < checkDictionary.Count(); i++)
            {
                if (i == (int)buttonView.Tag)
                {
                    checkDictionary[i] = true;   //error on here
                }
                else
                {
                    checkDictionary[i] = false;  //error on here
                }
            }

        }

我可以在 ListView 中显示我的记录。但是单选按钮可以选择多个。我不想选择多条记录。

Answer 1

您可以创建一个集合来存储单选按钮的检查状态，然后在 getView 加载集合时加载该集合。像这样:

class YourAdapter : BaseAdapter,CompoundButton.IOnCheckedChangeListener
    {
        private Dictionary<int, bool> checkDictionary = new Dictionary<int, bool>();
        int[] item;  //raplace your own data
        public MyAdapter(int[] value) //raplace your own data
        {
            item = value;
            for (int i = 0; i < item.Length; i++)
            {
                checkDictionary.Add(i,false);
            }
        }



public override View GetView(int position, View convertView, ViewGroup parent)
    {
       var item = items[position];
       View view = convertView;

    //if (view == null)
      {
        view = context.LayoutInflater.Inflate(Resource.Layout.StockTakeEditDetailList, null);
        view.DuplicateParentStateEnabled = true;


        createdview.Add(view);
        RadioButton lblradio = view.FindViewById<RadioButton>(Resource.Id.lblradio);

        lblradio.Tag = position;
        lblradio.Checked = checkDictionary[position];
        lblradio.SetOnCheckedChangeListener(this);

        view.FindViewById<TextView>(Resource.Id.txtLineNo).Text = item.FileRecord_ID.ToString();  //my field in adapter.
        view.FindViewById<TextView>(Resource.Id.txtbinloc).Text = item.ST_BinLoc.ToString();
        view.FindViewById<TextView>(Resource.Id.txtBarcodett).Text = item.ST_Barcode.ToString();
        view.FindViewById<TextView>(Resource.Id.txtQtytt).Text = item.ST_Qty.ToString();


        if (!view.HasOnClickListeners)
            view.Click += View_LongClick;
        view.RefreshDrawableState();
      }
        return view;
    }
public void OnCheckedChanged(CompoundButton buttonView, bool isChecked)
    {
        for (int i = 0; i < checkDictionary.Count; i++)
         {
           if (i == (int) buttonView.Tag)
            {
                checkDictionary[i] = true;
            }
           else
            {
                checkDictionary[i] = false;
            }
         }
            NotifyDataSetChanged();

      }
   }