Question

我试图将数据添加到列表视图。我正在使用适配器。列表视图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
                }
            }

        }

我可以在列表视图中显示我的记录。但是单选按钮可以选择多个。我不想选择多个记录。

Answer 1

您可以创建一个集合来存储单选按钮的检查状态，然后在将集合加载到getView中时加载该集合。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();

      }
   }

Answer 2

您可以选择多个单选按钮的原因是它们不属于同一单选按钮组。

来自Android Radiobutton官方文档的引言。

要创建每个单选按钮选项，请在布局中创建一个RadioButton。但是，由于单选按钮是互斥的，因此必须在RadioGroup中将它们分组在一起。通过将它们分组在一起，系统可确保一次只能选择一个单选按钮。

如何执行此操作？

RadioGroup就像单选按钮的视图组一样，因此您可以像使用它一样使用它

XML：

<?xml version="1.0" encoding="utf-8"?>
<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton android:id="@+id/radio_pirates"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/pirates"
    android:onClick="onRadioButtonClicked"/>
<RadioButton android:id="@+id/radio_ninjas"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/ninjas"
    android:onClick="onRadioButtonClicked"/>
</RadioGroup>

C＃：

RadioGroup rg = new RadioGroup(this); //create the RadioGroup
rg.Orientation = Orientation.Horizontal;//or Orientation.VERTICAL
RadioButton rb = new RadioButton(this);// create the radiobutton
rg.AddView(rb);// add to radio group

如何获取选中的单选按钮以及如何仅控制列表视图中选择的一个单选按钮

2 个答案: