展开式列表视图未展开组

问题描述

我想在单击每个组视图时显示展开子视图。但是现在它没有展开。如果我给出list.expandgroup（0），则第一个组视图将展开，并且所有子视图的值将在另一个组childview上更新。我的子视图列表是从api response.i存储的arraylist对象，我想按点击扩展所有子组。 .pls帮助

     public class OrderHistoryAdapter extends Baseexpandablelistadapter {
            private List<OrderHistoryObj> orderHistoryObjList;// group list
           private List<OrderDetailObj> orderDetailObjList;//child list
           private Context mContext;
           OnorderListner onorderListner;
          private LayoutInflater inflater;
    
        public OrderHistoryAdapter(Context mContext,List<OrderHistoryObj>  
        orderHistoryObjList,List<OrderDetailObj> orderDetailObjList,OnorderListner onorderListner) {
            // Create Layout Inflator
            this.orderHistoryObjList = orderHistoryObjList;
            this.orderDetailObjList = orderDetailObjList;
            this.mContext = mContext;
            this.onorderListner=onorderListner;
            inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        }
    
        @Override
        public int getGroupCount() {
            return orderHistoryObjList.size();
        }
    
        @Override
        public int getChildrenCount(int i) {
            return 1;
        }
        

   

 @Override
    public Object getGroup(int i) {
        return null;
    }

    @Override
    public Object getChild(int i,int i1) {
        return null;
    }

    @Override
    public long getGroupId(int i) {
        return 0;
    }

    @Override
    public long getChildId(int i,int i1) {
        return 0;
    }

    @Override
    public boolean hasstableIds() {
        // returns if the ids are specific ( unique for each group or item)
        // or relatives
        return false;
    }

    @Override
    public View getGroupView(int i,boolean b,View view,ViewGroup viewGroup){


        if (view == null) {
            view = inflater.inflate(R.layout.row_order_history_layout,viewGroup,false);
        }


        final OrderHistoryObj item = orderHistoryObjList.get(i);
        TextView order_id_value =  (TextView) view.findViewById(R.id.order_id_value);
        TextView order_placed_value = (TextView) view.findViewById(R.id.order_placed_value);

        final String order_id=item.getorder_id();
        String order_date=item.getorder_date();
        order_id_value.setText(order_id);
        order_placed_value.setText(order_date);
        view.setonClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                onorderListner.onorderId(order_id);


            }
        });
    
      

          return view;
            }
        
            @Override
            public View getChildView(int i,int i1,ViewGroup viewGroup) {
        
        
        
                if (view == null) {
                    view = inflater.inflate(R.layout.row_order_history_sub_layout,false);
                }
        
                 OrderDetailObj item = orderDetailObjList.get(i);
                ((TextView) view.findViewById(R.id.store_name)).setText(item.getShop_name());
                ((TextView) view.findViewById(R.id.billing_id_value)).setText(item.getBill_id());
                ((TextView) view.findViewById(R.id.amount_value)).setText(item.getAmount());
                Button view_but = (Button) view.findViewById(R.id.view_but);
        
        
                return view;
            }
        
            @Override
            public boolean isChildSelectable(int groupPosition,int childPosition) {
        
                return true;
            }
          }
    
    > Main activity populate layout
    
        
    
    private void populateLayout(final List<OrderDetailObj> list) {
        orderHistoryAdapter = new OrderHistoryAdapter(OrdeHistoryList.this,orderHistoryObjList,list,onorderListner);
        order_history_recycle.setAdapter(orderHistoryAdapter);
         order_history_recycle.setonGroupClickListener(new ExpandableListView.OnGroupClickListener() {
            public boolean onGroupClick(ExpandableListView arg0,View itemView,int itemPosition,long
    
       itemId) 
            {
                order_history_recycle.expandGroup(itemPosition);
                return true;
            }
        });
        order_history_recycle.setonGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
    
            @Override
            public void onGroupExpand(int groupPosition) {
    
                if (lastPosition != -1
                        && groupPosition != lastPosition) {
                    order_history_recycle.collapseGroup(lastPosition);
                }
                lastPosition = groupPosition;
            }
        });
    
  

 order_history_recycle.setonChildClickListener(new ExpandableListView.OnChildClickListener() {
            @Override
            public boolean onChildClick(ExpandableListView expandableListView,int i,long l) {
                return false;
            }
        });
      }

解决方法

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