如何在可扩展列表视图上插入标题行

时间:2016-05-05 08:37:53

标签: android expandablelistview

我有一个带有一个可扩展列表视图的Android活动。然后我创建了我的ExpandableListAdapter,所以我可以点击一个项目,我可以看到这个项目的孩子。还行吧。 现在我想为每个项目的子列表插入标准标题(标题)。所以我构建了这段代码:

public class ResultExpandableListAdapter extends BaseExpandableListAdapter {

    private Context context;
    private List<Result> listaRisultati;
    private HashMap<Integer, List<ResultXResult>> expandableListDetail;

    public ResultExpandableListAdapter(Context context, List<Result> listaRisultati,
                                       HashMap<Integer, List<ResultXResult>> expandableListDetail) {
        this.context = context;
        this.listaRisultati = listaRisultati;
        this.expandableListDetail = expandableListDetail;
    }

    @Override
    public Object getChild(int listPosition, int expandedListPosition) {
        return this.expandableListDetail.get(this.listaRisultati.get(listPosition).getId())
                .get(expandedListPosition);
    }

    @Override
    public long getChildId(int listPosition, int expandedListPosition) {
        return expandedListPosition;
    }

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

        if (convertView == null) {
            LayoutInflater layoutInflater = (LayoutInflater) this.context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            if(expandedListPosition ==0)
            {
                convertView = layoutInflater.inflate(R.layout.results_x_result_list_item_header, null);
            }

            if(expandedListPosition>0 && expandedListPosition<=getChildrenCount(expandedListPosition))
            {
                ResultXResult risultato = (ResultXResult) getChild(listPosition, expandedListPosition);
                convertView = layoutInflater.inflate(R.layout.results_x_result_list_item,null);

                TextView parameter = (TextView) convertView
                        .findViewById(R.id.parameter);

                TextView valueUM = (TextView) convertView
                        .findViewById(R.id.valueUm);

                TextView interpretation = (TextView) convertView
                        .findViewById(R.id.interpretation);

                TextView um = (TextView) convertView
                        .findViewById(R.id.um);


                parameter.setText(risultato.getInfo().getDisplayName());
                valueUM.setText(risultato.getValue());
                interpretation.setText(risultato.getInterpretationCode().getDisplayName());
                um.setText(risultato.getUnitaDiMisura());
            }
        }

        return convertView;
    }

    @Override
    public int getChildrenCount(int listPosition) {
        return this.expandableListDetail.get(this.listaRisultati.get(listPosition).getId())
                .size();
    }

    @Override
    public Object getGroup(int listPosition) {
        return this.listaRisultati.get(listPosition);
    }

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

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

    @Override
    public View getGroupView(int listPosition, boolean isExpanded,
                             View convertView, ViewGroup parent) {
        Result result = (Result) getGroup(listPosition);
        if (convertView == null) {
            LayoutInflater layoutInflater = (LayoutInflater) this.context.
                    getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.results_list_row, null);
        }
        TextView examination = (TextView) convertView
                .findViewById(R.id.examination);
        TextView startDate = (TextView) convertView
                .findViewById(R.id.startDate);
        TextView endDate = (TextView) convertView
                .findViewById(R.id.endDate);
        examination.setTypeface(null, Typeface.BOLD);

        examination.setText(result.getInfo().getDisplayName());
        startDate.setText(result.getDateStart());
        endDate.setText(result.getDateEnd()!=null ? result.getDateEnd()+" " : " ");
        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public boolean isChildSelectable(int listPosition, int expandedListPosition) {
        return true;
    }
}

我的临时解决方案是方法&#34; getChildView&#34;,如果是第一行,我可以插入一个layour,如果是另一行,我打印数据。因此,使用此代码,如果我有一个包含2个项目的ResultXResult列表(例如),我只能读取第二个项目。

有这个问题的解决方案,还是有另一种方法在子视图中插入标题?

这是我的应用运行: enter image description here

我的标题行是黄色行&#34;参数,值....&#34;

2 个答案:

答案 0 :(得分:0)

你是对的。为了向可扩展的Listview添加页眉和页脚,您可以进行一些修改。

getChildrenCount()方法返回特定组中子项的行数。这里我们可以在return方法中添加两行。第一行将用于标题,第二行将用于页脚。我们可以将特定布局扩展到组的第一个(标题)和最后一个行(页脚)。

答案 1 :(得分:0)

您可以使用以下代码轻松地将标题添加到expandablelistview:

var x = 2.5;
var hours = parseInt(x);
var minutes = ( x - parseInt(x) ) * 60;

只需复制活动中的上述代码即可。在上面的代码中(R.layout.nav_header)是头的xml文件,mExpandableListView是ExpandableListView的对象。