可扩展列表视图 Android + 过滤器 EditText

Question

我希望在 Android 的 ExpandableListView 中使用 EditText 过滤数据，确认 adapter 应该实现 Filtering，但由于缺乏关于筛选数据的知识，不知道如何实现这个功能。我的适配器结构如下：

    public class ExpandableListAdapter extends
        BaseExpandableListAdapter /*implements Filterable*/ {

    private final Context myContext;

    private String[] arrayTopics;
    private String[][] arraySubTopics;

    public PrimeirosSOSExpandableListAdapter(Context context) {
        this.myContext = context;
    }

    public ExpandableListAdapter(Context context,
            String[] arrayTopics, String[][] arraySubTopics) {
        this.myContext = context;
        this.arrayTopics = arrayTopics;
        this.arraySubTopics = arraySubTopics;

    }

    public Object getChild(int groupPosition, int childPosition) {
        return null;
    }

    public long getChildId(int groupPosition, int childPosition) {
        return 0;
    }

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

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) myContext
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.child_layout,
                    null);
        }

        TextView tv = (TextView) convertView.findViewById(R.id.tvChild);
        tv.setText(arraySubTopics[groupPosition][childPosition]);

        return convertView;
    }

    public int getChildrenCount(int groupPosition) {
        return arraySubTopics[groupPosition].length;
    }

    public Object getGroup(int groupPosition) {
        return null;
    }

    public int getGroupCount() {
        return arrayTopics.length;
    }

    public long getGroupId(int groupPosition) {
        return 0;
    }

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

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) myContext
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.group_layout,
                    null);
        }

        TextView tv = (TextView) convertView.findViewById(R.id.tvGroup);
        tv.setText(arrayTopics[groupPosition]);

        return convertView;
    }

    public boolean hasStableIds() {
        return false;
    }

    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }
}

- Victor CS

Answer 1

我对Android的这部分并不了解，因为我很新，但在研究另一个问题时，我看到了一些关于CursorTreeAdapter的内容。它内置了一些方法来处理过滤。这里是关于它的Android API信息。CursorTreeAdapter可以与ExpandableListView一起使用。

http://developer.android.com/reference/android/widget/CursorTreeAdapter.html

- Michael Garner