我有一个expandableListView并试图改变它的孩子:
((SubItem) adapter.getChild(i+1, 5)).setCount(unreadBox);
adapter.notifyDataSetChanged();
这是我的适配器类:
public class DrawerAdapter extends BaseExpandableListAdapter {
private Context context;
private List<Item> items;
private List<List<SubItem>> subItems;
public DrawerAdapter(Context context, List<Item> items, List<List<SubItem>> subItems) {
this.context = context;
this.items = items;
this.subItems = subItems;
}
@Override
public int getGroupCount() {
return items.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return subItems.get(groupPosition).size();
}
@Override
public Object getGroup(int position) {
return items.get(position);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return subItems.get(groupPosition).get(childPosition);
}
@Override
public long getGroupId(int position) {
return position;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View view, ViewGroup viewGroup) {
Item item = (Item) getGroup(groupPosition);
if (view == null) {
LayoutInflater layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = layoutInflater.inflate(R.layout.list_drawer_group, null);
}
ImageView iconView = (ImageView) view.findViewById(R.id.icon_view);
if (item.iconDrawableId != null) {
iconView.setImageResource(item.iconDrawableId);
iconView.setVisibility(View.VISIBLE);
} else {
iconView.setVisibility(View.GONE);
}
TextView groupHeader = (TextView) view.findViewById(R.id.group_header);
groupHeader.setText(item.title);
if (item.iconDrawableId != null) {
groupHeader.setPadding(
DimensionHelper.dpToPixels(context, 4.0f), 0,
DimensionHelper.dpToPixels(context, 16.0f), 0);
} else {
groupHeader.setPadding(
DimensionHelper.dpToPixels(context, 16.0f), 0,
DimensionHelper.dpToPixels(context, 16.0f), 0);
}
ImageView imageView = (ImageView) view.findViewById(R.id.image_view);
imageView.setImageResource(isExpanded ? R.drawable.ic_navigation_collapse : R.drawable.ic_navigation_expand);
imageView.setVisibility(getChildrenCount(groupPosition) > 0 ? View.VISIBLE : View.GONE);
return view;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isExpanded, View view, ViewGroup viewGroup) {
SubItem subItem = (SubItem) getChild(groupPosition, childPosition);
if (view == null) {
LayoutInflater layoutInflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = layoutInflater.inflate(R.layout.list_drawer_item, null);
}
TextView colorPreView = (TextView) view.findViewById(R.id.colorPreView);
if (subItem.getColor() != -1) {
colorPreView.setBackgroundColor(subItem.getColor());
colorPreView.setVisibility(View.VISIBLE);
} else {
colorPreView.setVisibility(View.GONE);
}
ImageView iconView = (ImageView) view.findViewById(R.id.icon_view);
if (subItem.iconDrawableId != null) {
iconView.setImageResource(subItem.iconDrawableId);
iconView.setVisibility(View.VISIBLE);
} else {
iconView.setVisibility(View.GONE);
}
TextView title = (TextView) view.findViewById(R.id.title_text_view);
title.setText(subItem.title);
if (subItem.iconDrawableId != null) {
title.setPadding(
DimensionHelper.dpToPixels(context, 4.0f), 0,
DimensionHelper.dpToPixels(context, 16.0f), 0);
} else {
title.setPadding(
DimensionHelper.dpToPixels(context, 40.0f), 0,
DimensionHelper.dpToPixels(context, 16.0f), 0);
}
TextView counter = (TextView) view.findViewById(R.id.counter_text_view);
counter.setText(String.valueOf(subItem.count));
counter.setVisibility(subItem.count > 0 ? View.VISIBLE : View.GONE);
return view;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public static class Item {
protected String title;
protected Integer iconDrawableId;
protected Listener listener;
public Item(String title, Integer iconDrawableId, Listener listener) {
this.title = title;
this.iconDrawableId = iconDrawableId;
this.listener = listener;
}
public Listener getListener() {
return listener;
}
public static interface Listener {
public void onClick(FragmentManager fragmentManager);
}
}
public static class SubItem extends Item {
protected long count;
protected int color;
public SubItem(String title, Integer iconDrawableId, long count, int color, Listener listener) {
super(title, iconDrawableId, listener);
this.count = count;
this.color = color;
}
public long getCount() {
return count;
}
public void setCount(long count) {
this.count = count;
}
public int getColor() {
return color;
}
public void setColor(int color) {
this.color = color;
}
}
}
notifyDataSetChanged()方法无法正常工作,有时候有时会调用getChildView,请帮忙解决这个问题。
答案 0 :(得分:5)
您正在将值更改为子项,但不会在适配器内部进行设置。
SubItem item = ((SubItem) adapter.getChild(i+1, 5)).setCount(unreadBox);
adapter.setChild(i+1,5,item);
adapter.notifyDataSetChanged();
在适配器中添加
@Override
public void setChild(int groupPosition, int childPosition,SubItem item) {
subItems.get(groupPosition).get(childPosition) = item;
}