Question

Hy all，

我正在尝试从ExpandableListView向ChildView的Linearlayout添加一些动态生成的视图。代码是：

 @Override
 public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
    LayoutInflater inflater = context.getLayoutInflater();
    if (convertView == null)
        convertView = inflater.inflate(R.layout.child_fragment_item_menu_child_view, null);

    TextView childName                              = (TextView) convertView.findViewById(R.id.childName);
    TextView childDetails                           = (TextView) convertView.findViewById(R.id.childDetails);
    LinearLayout childPriceWeightHolder_Single      = (LinearLayout) convertView.findViewById(R.id.childPriceWeightHolder_Single);
    LinearLayout childPriceWeightHolder_Multiple    = (LinearLayout) convertView.findViewById(R.id.childPriceWeightHolder_Multiple);

    JSONObject menuItem = null;
    try {
        menuItem = new JSONObject( getChild(groupPosition, childPosition) );
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    if(menuItem != null){
        childName.setText( menuItem.optString("name") );
        childDetails.setText( menuItem.optString("description") );

        final TextView tv1 = new TextView(context), tv2 = new TextView(context);

        if( menuItem.optJSONArray("advance_prices") == null || menuItem.optJSONArray("advance_prices").length() == 0 ){
            if(menuItem.optString("price") != null && menuItem.optString("price").compareToIgnoreCase("null") != 0){
                tv1.setText(menuItem.optString("price") + " " + menuItem.optString("currency_name"));
                tv1.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT));
            }

            if(menuItem.optString("weight") != null && menuItem.optString("weight").compareToIgnoreCase("null") != 0){
                tv2.setText(menuItem.optString("weight"));
                tv2.setTextColor(context.getResources().getColor(R.color.gray));
                tv2.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT));
            }

            childPriceWeightHolder_Single.addView(tv1);
            childPriceWeightHolder_Single.addView(tv2);
        }else{
            // COMPOSED VIEW(multiple prices and multiple weights, etc...)
        }
    }

    return convertView;
 }

问题在于，在第一页之后，适配器生成了新的子节点，它为这些dinamycally添加的textViews保留了引用或其他内容，并且它会混乱一切。我试着添加tv1.setId（..）;但它不起作用。

任何解决方案？谢谢！

Answer 1

expandablelistview的基本示例是.. here ....

在您的Activity中实现OnChildClickListener并实现此方法..

@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {

   //Add new chid data in your list (ex ArrayLis or Array whatever you use)
   adapter.notifyDataSetChanged() // BaseExpandableListAdapter's adapter...


return true;
}

这对你有用吗？

动态地向ExpandableListView的Child添加视图

1 个答案: