Question

我不知道为什么当我按下父项目展开或折叠该组时，其他孩子其他父母会出现在刷新状态吗？

这是项目：

     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="55dip"
      android:orientation="vertical" >

    <WebView android:id="@+id/webkit"
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
    />
    </LinearLayout>

这对于父母来说：

     <TextView
      android:id="@+id/lblListHeader"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"
      android:textSize="17dp"
      android:textColor="#f9f93d" />

    </LinearLayout>

这是main_activity.xml：

     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical"
     android:background="#f4f4f4" >

        <ExpandableListView
            android:id="@+id/lvExp"
            android:layout_height="match_parent"
            android:layout_width="match_parent"/>   

    </LinearLayout>

这是ExpandableListAdapter.java中的“getChildView”方法“ExpandableListAdapter extends BaseExpandableListAdapter”

      @Override
      public View getChildView(int groupPosition, final int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent) {

       final String childText = (String) getChild(groupPosition, childPosition);

      if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.list_item, null);
      }

      WebView webview = (WebView) convertView
            .findViewById(R.id.webkit);

      webview.loadData(childText,
            "text/html", "UTF-8");
      return convertView;
      }

最后这是main.java：

       // preparing list data
      prepareListData();

    listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);

    // setting list adapter
    expListView.setAdapter(listAdapter);

      private void prepareListData() {
    listDataHeader = new ArrayList<String>();
    listDataChild = new HashMap<String, List<String>>();

    // Adding child data
    listDataHeader.add("Top 250");
    listDataHeader.add("Now Showing");
    listDataHeader.add("Coming Soon..");


    // Adding child data
    String s = "<html><body><b>Hello, world!</b><br />" +
                    "<ul>" +
                    "<li>first</li>"+
                    "</ul>"+
                "</body></html>";
    List<String> top250 = new ArrayList<String>();
    top250.add(s);

    List<String> nowShowing = new ArrayList<String>();
    nowShowing.add(s);

    List<String> comingSoon = new ArrayList<String>();
    comingSoon.add(s);

    listDataChild.put(listDataHeader.get(0), top250); // Header, Child data
    listDataChild.put(listDataHeader.get(1), nowShowing);
    listDataChild.put(listDataHeader.get(2), comingSoon);
    }

Answer 1

我认为问题可能与您如何初始化视图并在列表中重用它们有关。你使用ViewHolder模式吗？

也许这个其他答案可以帮到你：ListView reusing views when ... I don't want it to

有关ViewHolder的更多链接：

http://developer.android.com/training/improving-layouts/smooth-scrolling.html#ViewHolder

http://www.codeofaninja.com/2013/09/android-viewholder-pattern-example.html

当我按下可扩展列表中的父项时，其他父母中的其他子项会自动刷新，为什么？

1 个答案: