Question

I have problem adding children ,when i add one child then on ui two child appear with same childposition..my problem is similar to these mentioned in following questions

Child Layout is repeating many times in ExpandableListView

https://stackoverflow.com/questions/10938763/double-child-entries-in-expandablelistview

But unable to find a solution .. please see my code here

Value for children is given using this double dimension array..

String[][] child = {
         mContext.getResources().getStringArray(R.array.alerts),
         mContext.getResources().getStringArray(R.array.alerts),
         mContext.getResources().getStringArray(R.array.alerts),
         mContext.getResources().getStringArray(R.array.alerts),
         mContext.getResources().getStringArray(R.array.alerts) };

I used this :

@Override
  public int getChildrenCount(int groupPosition) {
    return child.length;
  }

but for this also child count is 5 and it shows up 10 items..

Answer 1

It seems you are hard-coded child position like,

  @Override
  public int getChildrenCount(int groupPosition) {
    return 1;
  }

where as it should be your_data_collection_size

Also, you have hard-coded childId like,

  @Override
  public long getChildId(int groupPosition, int childPosition) {
    return 0;
  }

which should be childPosition not 0

If you further have any query/problem you can download and check my demo example from you github and can come back to me with your query if you have any thereafter.