我在可扩展列表中获得了EditText，这是根据要编辑的EditText的结果的育儿数量。但是EditText位置总是处于不同或育儿错误，我会遇到此错误：
（" java.lang.indexoutofboundsexception：无效索引3，大小为3"）
我的ExplablElistAdapter：
public class ExpandableListAdapter extends BaseExpandableListAdapter {
public ExpandableListView expandableListView;
private ChildViewHolder childViewHolder;
private GroupViewHolder groupViewHolder;
private Context _context;
private ArrayList<BBQrValidateModel.Campaigns> mDataCampaignModel; //stampcount and totalneed
public ExpandableListAdapter(ArrayList<BBQrValidateModel.Campaigns> mDataCampaignModel,
Context context, ExpandableListView expandableListView) {
this._context = context;
this.mDataCampaignModel = mDataCampaignModel;
this.expandableListView = expandableListView;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return campaign.coffeeGiftCount;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
BBQrValidateModel.Campaigns campaign = mDataCampaignModel.get(groupPosition);
if (convertView == null) {
convertView = MainActivity.inflater.inflate(R.layout.row_campaign_buy_or_hide, parent, false);
childViewHolder = new ChildViewHolder();
childViewHolder.txtCoffeeGift = convertView.findViewById(R.id.txtCoffeeGift);
childViewHolder.txtCoffeeHide = convertView.findViewById(R.id.txtCoffeeHide);
childViewHolder.txtCoffeeUse = convertView.findViewById(R.id.txtCoffeeUse);
convertView.setTag(childViewHolder);
} else {
childViewHolder = (ChildViewHolder) convertView.getTag();
}
childViewHolder.txtCoffeeGift.setText(campaign.prize);
//kullan ve sakla tıklanınca modeldekı degısıklıgı buradan yapıcaz
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
BBQrValidateModel.Campaigns campaign = mDataCampaignModel.get(groupPosition);
return campaign.coffeeGiftCount;
}
@Override
public Object getGroup(int groupPosition) {
return mDataCampaignModel.get(groupPosition);
}
@Override
public int getGroupCount() {
return (mDataCampaignModel == null) ? 0 : mDataCampaignModel.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(final int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
final BBQrValidateModel.Campaigns campaign = mDataCampaignModel.get(groupPosition);
if (convertView == null) {
convertView = MainActivity.inflater.inflate(R.layout.row_campaigndetail, parent, false);
groupViewHolder = new GroupViewHolder();
groupViewHolder.txtStampCount = convertView.findViewById(R.id.txtStampCount);
groupViewHolder.txtCampaignName = convertView.findViewById(R.id.txtCampaignName);
groupViewHolder.txtTotalNeeds = convertView.findViewById(R.id.txtTotalNeeds);
groupViewHolder.btnFreepProductNum1 = convertView.findViewById(R.id.btnFreepProductNum1);
groupViewHolder.btnFreepProductNum2 = convertView.findViewById(R.id.btnFreepProductNum2);
groupViewHolder.btnFreepProductNum3 = convertView.findViewById(R.id.btnFreepProductNum3);
groupViewHolder.btnFreepProductNum4 = convertView.findViewById(R.id.btnFreepProductNum4);
groupViewHolder.btnFreepProductNum5 = convertView.findViewById(R.id.btnFreepProductNum5);
groupViewHolder.edtPurchasedCoffeeCount = convertView.findViewById(R.id.edtPurchasedCoffeeCount);
convertView.setTag(groupViewHolder);
} else {
groupViewHolder = (GroupViewHolder) convertView.getTag();
}
groupViewHolder.edtPurchasedCoffeeCount.setId(groupPosition);
groupViewHolder.txtTotalNeeds.setText(String.valueOf(campaign.totalNeeds));
groupViewHolder.txtStampCount.setText(String.valueOf(campaign.stampCount));
groupViewHolder.txtCampaignName.setText(campaign.description);
if (groupViewHolder.edtPurchasedCoffeeCount.getText().toString().isEmpty()) {
campaign.edtPurchasedCoffeeCount = 0;
} else {
campaign.edtPurchasedCoffeeCount = Integer.valueOf(groupViewHolder.edtPurchasedCoffeeCount
.getText().toString());
}
final int totalneeds = campaign.totalNeeds;
final int stampcount = campaign.stampCount;
campaign.coffeeGiftCount = (stampcount + campaign.edtPurchasedCoffeeCount) / totalneeds;
TextWatcher inputTextWatcher = new TextWatcher()
{
public void onTextChanged(CharSequence s, int start, int before, int count)
{
if (stampcount + campaign.coffeeGiftCount > totalneeds)
{
campaign.coffeeGiftCount = (stampcount + campaign.edtPurchasedCoffeeCount) / totalneeds;
}
}
public void beforeTextChanged(CharSequence s, int start, int count, int after)
{
}
public void afterTextChanged(Editable s)
{
notifyDataSetChanged();
}
};
groupViewHolder.edtPurchasedCoffeeCount.addTextChangedListener(inputTextWatcher);
expandableListView.expandGroup(groupPosition);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
我的视图持有人（适配器中的内类）：
public final class GroupViewHolder {
TextView txtStampCount;
TextView txtCampaignName;
TextView txtTotalNeeds;
EditText edtPurchasedCoffeeCount;
Button btnFreepProductNum1;
Button btnFreepProductNum2;
Button btnFreepProductNum3;
Button btnFreepProductNum4;
Button btnFreepProductNum5;
}
public final class ChildViewHolder {
TextView txtCoffeeGift;
TextView txtCoffeeUse;
TextView txtCoffeeHide;
}
}
在getchild方法中，您要返回0表示您没有任何子对象的孩子，分组数据应在其中返回该位置的子对象。
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
public ExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_item, null);
}
EditText edtListChild = (EditText) convertView
.findViewById(R.id.lblListItem);
txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
此代码可以帮助您，这对我有帮助。
在您的代码中的方法下方更改：
@Override
public Object getChild(int groupPosition, int childPosititon)
{
//return 0;
Return value of child here
}
@Override
public Object getGroup(int groupPosition)
{
//return 0;
Return value of group here
}