问题描述
我创建了一个带有可扩展列表视图的导航抽屉.每个子项都有一个textview和一个image view.所有子项都具有相同的图像.我想为每个子项放置不同的图像.我有一个ExpandableListAdapter类.我应该在此类的getChildView方法中进行一些更改吗?我该如何更改?这是我的ExpandableListAdapter类:
I created a navigation drawer with an expandable listview. Every child item has a textview and an image view. Ever child item has the same image. I want to put different images for every child item. I have an ExpandableListAdapter class. Should i do some changes in getChildView method of this class? How can i change it? Here is my ExpandableListAdapter class:
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
public ExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData ) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@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.drawer_list_item, null);
}
ImageView iconn =(ImageView)convertView.findViewById(R.id.thumbNail);
iconn.setImageResource(R.drawable.car_73);
TextView txtListChild = (TextView) convertView
.findViewById(R.id.textView);
txtListChild.setTextColor(Color.BLUE);
txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
这是列表适配器部分的活动类:
Here is activity class of list adapter part:
listDataChild.put(listDataHeader.get(0),ReceivedVal); //标头,子数据
listDataChild.put(listDataHeader.get(0), receivedVal ); // Header, Child data
listDataChild.put(listDataHeader.get(1), top250);
listAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild);
expListView.setAdapter(listAdapter);
(receivedVal和top250是数组列表,它们具有值)
(receivedVal and top250 are array list and they have values)
推荐答案
private void prepareListData() {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
// Adding child data
listDataHeader.add("imageId1");
listDataHeader.add("imageId2");
listDataHeader.add("imageId3");
listDataHeader.add("imageId4");
listDataHeader.add("imageId5");
listDataHeader.add("imageId6");
// Adding child data
List<String> Chicken = new ArrayList<String>();
imageId1.add("imagename");
imageId1.add("imagename");
imageMap.put("imageId", R.drawable.imagename)
}
这篇关于如何在Android的ExpandableListView中从可绘制文件添加不同的图像?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!