@@ -7,7 +7,7 @@ class YYRadioListTile extends StatefulWidget {
77 YYRadioListTile ({
88 Key key,
99 this .items,
10- this .intialValue= 0 ,
10+ this .intialValue,
1111 this .activeColor,
1212 this .onChanged,
1313 }) : assert (items != null ),
@@ -25,32 +25,38 @@ class YYRadioListTile extends StatefulWidget {
2525}
2626
2727class YYRadioListTileState extends State <YYRadioListTile > {
28- var groupId = 0 ;
29- var selectedItem = - 1 ;
28+ var groupId = - 1 ;
29+ 30+ void intialSelectedItem () {
31+ //intialValue:
32+ //The button initializes the position.
33+ //If it is not filled, it is not selected.
34+ if (groupId == - 1 ) {
35+ groupId = widget.intialValue ?? - 1 ;
36+ }
37+ }
3038
3139 @override
3240 Widget build (BuildContext context) {
33- if (selectedItem == - 1 ) {
34- selectedItem = widget.intialValue != null ? widget.intialValue : 0 ;
35- }
41+ intialSelectedItem ();
42+ 3643 return ListView .builder (
3744 padding: EdgeInsets .all (0.0 ),
3845 shrinkWrap: true ,
3946 itemCount: widget.items.length,
4047 itemBuilder: (BuildContext context, int index) {
41- var radioItem = widget.items[index];
4248 return Material (
4349 color: Colors .white,
4450 child: RadioListTile (
45- title: Text (radioItem .text),
46- value: radioItem.value == null ? index: radioItem.value ,
47- groupValue: selectedItem ,
51+ title: Text (widget.items[index] .text),
52+ value: index,
53+ groupValue: groupId ,
4854 activeColor: widget.activeColor,
4955 onChanged: (int value) {
5056 setState (() {
51- selectedItem = value;
57+ widget.onChanged (value);
58+ groupId = value;
5259 });
53- widget.onChanged (value);
5460 },
5561 ),
5662 );
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