我正在尝试扩展 BaseExpandableListAdapter，但是当我查看列表并选择要扩展的元素之一时，列表的顺序会反转。例如，如果我有一个包含 4 个元素的列表并选择第 1 个元素，则顺序(从上到下)现在为 4、3、2、1，第 4 个元素(现在位于顶部)展开。如果我展开第 4 个元素，顺序将恢复为 1、2、3、4，没有展开的元素。

这是我的实现:

公共(public)类 SensorExpandableAdapter 扩展 BaseExpandableListAdapter {

    private static final int FILTER_POSITION = 0;
    private static final int FUNCTION_POSITION = 1;
    private static final int NUMBER_OF_CHILDREN = 2;
    ArrayList<SensorType> mParentGroups;
    private Context mContext;
    private LayoutInflater mInflater;

    public SensorExpandableAdapter(ArrayList<SensorType> parentGroup, Context context) {
        mParentGroups = parentGroup;
        mContext = context;
        mInflater = LayoutInflater.from(mContext);
    }
    @Override
    public Object getChild(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        if(childPosition == FILTER_POSITION) return "filter";
        else return "function";
    }

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

    @Override
    public View getChildView(int groupPosition, int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {
        if(convertView == null)
        {
            convertView = (RelativeLayout)mInflater.inflate(R.layout.sensor_row_list_item, parent, false);
            if(childPosition == FILTER_POSITION) {
                ((CheckBox)convertView.findViewById(R.id.chkTextAddFilter)).setText("Add Filter");
            } else {
                ((CheckBox)convertView.findViewById(R.id.chkTextAddFilter)).setText("Add Function"); 
                ((CheckBox)convertView.findViewById(R.id.chkTextAddFilter)).setEnabled(false);
            }
        }
        return convertView;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        // TODO Auto-generated method stub
        return NUMBER_OF_CHILDREN;
    }

    @Override
    public Object getGroup(int groupPosition) {
        return mParentGroups.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        // TODO Auto-generated method stub
        return mParentGroups.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        // TODO Auto-generated method stub
        return groupPosition;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        if(convertView == null)
        {
            convertView = mInflater.inflate(android.R.layout.simple_expandable_list_item_1, parent, false);
            TextView tv = ((TextView)convertView.findViewById(android.R.id.text1));
            tv.setText(mParentGroups.get(groupPosition).toString());
        }
        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        // TODO Auto-generated method stub
        return true;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        // TODO Auto-generated method stub
        return true;
    }
}

`

我只需要采用我自己的 SensorType 类的简单 ArrayList。所有类(class)的 child 都一样，只有两个。

此外，如何让每个组中的父级可点击？我已经尝试在我的 ExpandableListActivity 中使用此 getExpandableListView().setOnLongClickableListener() ... 并在父 TextView 上设置其 OnLongClickableListener 但均无效。

非常感谢对其中任何一个的任何帮助!

最佳答案

public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        if(convertView == null)
        {

只需注释掉“如果”。这应该有所帮助。

关于Android 扩展 BaseExpandableListAdapter，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/2527516/