【发布时间】：2012-04-14 12:25:58
【问题描述】：
我正在为 Android 应用程序中的一件设备复制检查表。有一个 ExpandableListView，其中组数据由机器的不同系统组成，子数据包含带有 RadioGroup 的项目清单，供技术人员指示项目的通过/失败状态。除了在一个孩子中为 RadioButton 选择一个值时，所有的工作都很好，它为其他组中的同一个 RadioButton 选择一个值。所以如果我有：
Group 1
Question 1
Passed
Failed
Corrected
NA
Question 2
Passed
Failed
Corrected
NA
Group 2
Question 1
Passed
Failed
Corrected
NA
Question 2
Passed
Failed
Corrected
NA
如果我在第 1 组的两个问题中都选择了通过，而没有进入第 2 组，那么在展开时，其中的 1 个或两个 RadioGroups 也会被选中。
我用来创建带有 RadioGroup 的子组的布局如下所示
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="15dip">
<TextView
android:id="@+id/questionText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<RadioGroup
android:tag="actionGroup"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton
android:tag="passed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Passed"/>
<RadioButton
android:tag="failed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Failed"/>
<RadioButton
android:tag="corrected"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Corrected"/>
<RadioButton
android:tag="na"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="NA"/>
</RadioGroup>
</LinearLayout>
BaseExpandableListAdapter 的实例化
ExpandableListView inspectionQuestions = (ExpandableListView) FindViewById(Android.Resource.Id.List);
inspectionQuestions.SetAdapter(new ExpAdapter(this));
BaseExpandableListAdapter
public class ExpAdapter : BaseExpandableListAdapter
{
private readonly Context context;
Questions questions = new Questions();
private int seed = 1000;
public ExpAdapter(Context ctx)
{
context = ctx;
}
public override Object GetChild(int groupPosition, int childPosition)
{
return null;
}
public override long GetChildId(int groupPosition, int childPosition)
{
return 0;
}
public override View GetChildView(int groupPosition, int childPosition, bool isLastChild, View convertView, ViewGroup parent)
{
if (convertView == null)
{
LayoutInflater inflater = (LayoutInflater) context.GetSystemService(Context.LayoutInflaterService);
convertView = inflater.Inflate(Resource.Layout.inspection_row_2, null);
}
int currentID;
TextView question = (TextView) convertView.FindViewById(Resource.Id.questionText);
RadioGroup radio = (RadioGroup) convertView.FindViewWithTag("actionGroup");
radio.Id = seed++;
RadioButton pass = (RadioButton) convertView.FindViewWithTag("passed");
pass.Id = seed++;
RadioButton fail = (RadioButton) convertView.FindViewWithTag("failed");
fail.Id = seed++;
RadioButton correct = (RadioButton)convertView.FindViewWithTag("corrected");
correct.Id = seed++;
RadioButton na = (RadioButton)convertView.FindViewWithTag("na");
na.Id = seed++;
string[][] items = questions.childItems();
question.Text = items[groupPosition][childPosition];
return convertView;
}
public override int GetChildrenCount(int groupPosition)
{
return questions.childItems()[groupPosition].Length;
}
public override Object GetGroup(int groupPosition)
{
return null;
}
public override long GetGroupId(int groupPosition)
{
return 0;
}
public override View GetGroupView(int groupPosition, bool isExpanded, View convertView, ViewGroup parent)
{
if (convertView == null)
{
LayoutInflater inflater = (LayoutInflater) context.GetSystemService(Context.LayoutInflaterService);
convertView = inflater.Inflate(Android.Resource.Layout.SimpleExpandableListItem1, null);
}
TextView groupName = (TextView) convertView.FindViewById(Android.Resource.Id.Text1);
QuestionGrouper grouper = new QuestionGrouper();
groupName.Text = grouper.groupItems()[groupPosition];
return convertView;
}
public override bool IsChildSelectable(int groupPosition, int childPosition)
{
return true;
}
public override int GroupCount
{
get { return 9; }
}
public override bool HasStableIds
{
get { return false; }
}
}
根据建议编辑 GetChildView：
public override View GetChildView(int groupPosition, int childPosition, bool isLastChild, View convertView, ViewGroup parent)
{
if (convertView == null)
{
LayoutInflater inflater = (LayoutInflater) context.GetSystemService(Context.LayoutInflaterService);
convertView = inflater.Inflate(Resource.Layout.inspection_row_2, null);
}
TextView question = (TextView) convertView.FindViewById(Resource.Id.questionText);
RadioGroup radio = (RadioGroup) convertView.FindViewById(Resource.Id.activityGroup);
int count = radio.ChildCount;
if (count == 4)
{
return convertView;
}
RadioButton pass = new RadioButton(context) {Text = "Passed"};
RadioButton fail = new RadioButton(context) {Text = "Failed"};
RadioButton correct = new RadioButton(context) {Text = "Corrected"};
RadioButton na = new RadioButton(context) {Text = "NA"};
radio.AddView(pass);
radio.AddView(fail);
radio.AddView(correct);
radio.AddView(na);
string[][] items = questions.childItems();
question.Text = items[groupPosition][childPosition];
return convertView;
}
【问题讨论】：
标签： android xamarin.android expandablelistview