[英]How to get checked radio button and how to control only one radio button selected in list view
我試圖將我的數據添加到列表視圖中。 我正在使用適配器。 在列表視圖中有單選按鈕和一些字段。
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
}
}
}
我可以在列表視圖中顯示我的記錄。但是單選按鈕可以選擇多個。 我不想選擇多條記錄。
您可以創建一個集合來存儲單選按鈕的檢查狀態,然后在getView
加載該集合時加載該集合。 像這樣 :
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();
}
}
您可以選擇多個單選按鈕的原因是它們不屬於同一個單選按鈕組。
引用自 Android Radiobutton的官方文檔。
要創建每個單選按鈕選項,請在您的布局中創建一個 RadioButton。 但是,因為單選按鈕是互斥的,所以您必須將它們組合到 RadioGroup 中。 通過將它們組合在一起,系統確保一次只能選擇一個單選按鈕。
這該怎么做?
RadioGroup 就像 Radiobuttons 的一個視圖組,因此您可以像使用它一樣使用它
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
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