触摸时,ExpandableListView子项不会获得焦点

Question

好吧,所以我写了一个ExpandableListView和子类BaseExpandableListAdapter ...一切正常,但我无法让孩子的视图在点击时获得焦点.如果我使用轨迹球一切正常.但如果我试图点击一个孩子,我得不到任何反馈.

我已经尝试设置android:focusable,android:focusableInTouchMode和android:clickable(我也试过通过代码设置这个),但我无法得到任何工作.有任何想法吗？

这是我的适配器代码:

public class ExpandableAppAdapter extends BaseExpandableListAdapter
{
    private PackageManager m_pkgMgr;
    private Context m_context;
    private List<ApplicationInfo> m_groups;
    private List<List<ComponentName>> m_children;

    public ExpandableAppAdapter(Context context, List<ApplicationInfo> groups, List<List<ComponentName>> children)
    {
        m_context = context;
        m_pkgMgr = m_context.getPackageManager();
        m_groups = groups;
        m_children = children;
    }

    @Override
    public Object getChild(int groupPos, int childPos) 
    {
        return m_children.get(groupPos).get(childPos);
    }

    @Override
    public long getChildId(int groupPos, int childPos) 
    {
        return childPos;
    }

    @Override
    public int getChildrenCount(int groupPos) 
    {
        return m_children.get(groupPos).size();
    }

    @Override
    public View getChildView(int groupPos, int childPos, boolean isLastChild, View convertView, ViewGroup parent) 
    {
        if (convertView == null)
        {
            LayoutInflater inflater = LayoutInflater.from(m_context);
            convertView = inflater.inflate(R.layout.expandable_app_child_row, null);
        }

        ComponentName child = (ComponentName)getChild(groupPos, childPos);
        TextView txtView = (TextView)convertView.findViewById(R.id.item_app_pkg_name_id);
        if (txtView != null)
            txtView.setText(child.getPackageName());

        txtView = (TextView)convertView.findViewById(R.id.item_app_class_name_id);
        if (txtView != null)
            txtView.setText(child.getClassName());

        convertView.setFocusableInTouchMode(true);
        return convertView;
    }

    @Override
    public Object getGroup(int groupPos) 
    {
        return m_groups.get(groupPos);
    }

    @Override
    public int getGroupCount() 
    {
        return m_groups.size();
    }

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

    @Override
    public View getGroupView(int groupPos, boolean isExpanded, View convertView, ViewGroup parent) 
    {
        if (convertView == null)
        {
            LayoutInflater inflater = LayoutInflater.from(m_context);
            convertView = inflater.inflate(R.layout.expandable_app_group_row, null);
        }

        ApplicationInfo group = (ApplicationInfo)getGroup(groupPos);
        ImageView imgView = (ImageView)convertView.findViewById(R.id.item_selection_icon_id);
        if (imgView != null)
        {
            Drawable img = m_pkgMgr.getApplicationIcon(group);
            imgView.setImageDrawable(img);
            imgView.setMaxWidth(20);
            imgView.setMaxHeight(20);
        }

        TextView txtView = (TextView)convertView.findViewById(R.id.item_app_name_id);
        if (txtView != null)
            txtView.setText(m_pkgMgr.getApplicationLabel(group));

        return convertView;
    }
    @Override
    public boolean hasStableIds() 
    {
        return false;
    }
    @Override
    public boolean isChildSelectable(int groupPos, int childPos) 
    {
        return true;
    }
}

提前致谢!

Answer 1

好吧，我终于想通了！

它实际上与我的 XML 文件而不是我的适配器有关（我显示了适配器以表明我setFocusableInTouchMode在创建子视图时正在调用）。

我正在使用的教程（不记得是哪一个）让我将孩子的高度设置为：

android:layout_height="?android:attr/listPreferredItemHeight"

一旦我将其更改为wrapp_content，一切就开始正常工作。