我在我的应用程序中使用Sectioned ListView
在ListView的行中我有TextView和RadioGroup.
因此，当我单击单选按钮时，它会被点击并正常工作。
但是当我点击并滚动视图时，所选视图也会得到
消失了，变得不受控制了。
这是我正在使用的XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/relativelay"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/list_bg" >
<TextView
android:id="@+id/tvname"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:maxLines="1"
android:padding="10dp"
android:textColor="#000000"
android:textSize="18dp"
android:textStyle="bold" />
<RadioGroup
android:id="@+id/radioGroup1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/check_present"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginRight="20dp"
android:onClick="onPresentClick" />
<RadioButton
android:id="@+id/check_absent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/check_present"
android:onClick="onPresentClick" />
</RadioGroup>
</RelativeLayout>
这是我用于Sectioned ListView ....
这是我更新的代码......
public class NamesAdapter extends ArrayAdapter<Item> {
private ArrayList<Item> items;
private LayoutInflater vi;
private Item objItem;
private ArrayList<Items> presentSelected = new ArrayList<Items>();;
private ArrayList<Items> absentSelected = new ArrayList<Items>();;
private Map<Integer, Boolean> map = new HashMap<Integer, Boolean>();
ViewHolderSectionName holderSection;
ViewHolderName holderName;
Items item;
public NamesAdapter(Context context, ArrayList<Item> items) {
super(context, 0, items);
this.items = items;
vi = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
objItem = items.get(position);
if (objItem.isSectionItem()) {
ItemsSections si = (ItemsSections) objItem;
if (convertView == null
|| !convertView.getTag().equals(holderSection)) {
convertView = vi.inflate(R.layout.alphabet_separator, null);
holderSection = new ViewHolderSectionName();
convertView.setTag(holderSection);
} else {
holderSection = (ViewHolderSectionName) convertView.getTag();
}
holderSection.section = (TextView) convertView
.findViewById(R.id.alphabet_letter);
holderSection.section
.setText(String.valueOf(si.getSectionLetter()));
} else {
Items ei = (Items) objItem;
if (convertView == null || !convertView.getTag().equals(holderName)) {
convertView = vi.inflate(R.layout.row, null);
holderName = new ViewHolderName();
holderName.name = (TextView) convertView
.findViewById(R.id.tvname);
holderName.radioGroup = (RadioGroup) convertView
.findViewById(R.id.radioGroup1);
holderName.checkAbsent = (RadioButton) convertView
.findViewById(R.id.check_absent);
holderName.checkPresent = (RadioButton) convertView
.findViewById(R.id.check_present);
Boolean present = map.get(position);
Log.e("Names Adapter", "is Selected " + present);
if (present != null && present.booleanValue()) {
// set present checkbox selected
holderName.checkPresent.setSelected(true);
} else {
holderName.checkAbsent.setSelected(true);
// set absent checkbox selected
}
holderName.radioGroup
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group,
int checkedId) {
// TODO Auto-generated method stub
switch (checkedId) {
case R.id.check_absent:
item = (Items) holderName.checkAbsent
.getTag();
absentSelected.add(item);
map.put(position, true);
break;
case R.id.check_present:
item = (Items) holderName.checkPresent
.getTag();
presentSelected.add(item);
map.put(position, true);
break;
default:
break;
}
}
});
/*
* holderName.checkAbsent .setOnCheckedChangeListener(new
* CompoundButton.OnCheckedChangeListener() {
*
* @Override public void onCheckedChanged( CompoundButton
* buttonView, boolean isChecked) { // TODO Auto-generated
* method stub holderName.checkAbsent.setSelected(isChecked); //
* selected1.add();
*
* } });
*
* holderName.checkPresent .setOnCheckedChangeListener(new
* CompoundButton.OnCheckedChangeListener() {
*
* @Override public void onCheckedChanged( CompoundButton
* buttonView, boolean isChecked) { // TODO Auto-generated
* method stub holderName.checkAbsent.setSelected(isChecked); //
* selected2.add();
*
* } });
*/
convertView.setTag(holderName);
} else {
holderName = (ViewHolderName) convertView.getTag();
}
if (holderName.name != null)
holderName.name.setText(ei.getName());
convertView.setOnCreateContextMenuListener(null);
}
return convertView;
}
public static class ViewHolderName {
public TextView name;
public RadioGroup radioGroup;
public RadioButton checkPresent;
public RadioButton checkAbsent;
}
public static class ViewHolderSectionName {
public TextView section;
}
}
答案 0 :(得分：3)
您应该维护/保留“已检查”单选按钮的状态，以便在向上和向下滚动时检查它，因为在向上/向下滚动列表视图中，列表适配器会重新创建每个列表项/视图。
您应该通过在单选按钮上设置监听器来保留已检查单选按钮的位置/索引。
您可以使用hashMap将list-item保存为s KEY，将'Checked'状态保存为值。 当用户选中标记框时，将键值添加到地图中，当用户取消选中该框而不是从地图中删除键时。
在渲染列表视图中使用此地图。代码如下：
private Map<Integer, Boolean> map = new HashMap<Integer, Boolean>();
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
Boolean present = map.get(position);
if(present != null && present.booleanValue()){
// set present checkbox selected
} else {
// set absent checkbox selected
}
holderName.radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId) {
case R.id.check_absent:
map.put(position, false)
break;
case R.id.check_present:
map.put(position, true)
break;
}
}
});
}