如何在ExpandableListView中隐藏特定组的子项？

Question

My ExpandableListView has always single children for a particular group. For some groups I'd like to hide child items however I'd like the group to be still clickable (every group item after click changes it's layout). So what should be returned for such groups from getChildView ?

Answer 1

Override getChildrenCount and for your wanted groups return 0, as if they don't have children. They will still be clickable though.

@Override
public int getChildrenCount(int groupPosition) {
    if (groupPosition == 1) {
        return 0;
    } else {
        return super.getChildrenCount(groupPosition);
    }
}

Answer 2

Here is what i think, the code is not tested

public view getChildView(int groupPosition, int ChildPosition, boolean b, View view, ViewGroup viewGroup){
if(!groupPostion)//for the group you dont want the layout to be displayed
v=your custom view for the child items.//or if you know the exact position define it like 
//if or use switch (groupPosition==something){v.setVisibility(View.GONE)}
return v;
}

Answer 3

You need to call collapseGroup() . Also in your constructor you need your ExpandableListView

public class YourExapandableAdapter extends BaseExpandableListAdapter {

    private Context mContext;
    ExpandableListView mExpandableListView;
    int mLastExpandedGroupPosition = -1;

    public YourExapandableAdapter(Context context, ExpandableListView expandableListView) {
            mContext = context;
            mExpandableListView = expandableListView;
    }

    @Override
    public void onGroupExpanded(int groupPosition) {
        super.onGroupExpanded(groupPosition);
        if(groupPosition != mLastExpandedGroupPosition){
                mExpandableListView.collapseGroup(mLastExpandedGroupPosition);
        }

        mLastExpandedGroupPosition = groupPosition;
    }

In this case I hide last group, but you can the current group or whatever you want.