我创建了自定义可扩展列表视图,其中包含文本视图和组项中的图像。我想在可扩展列表视图中隐藏某些组中的组指示符。如何解决此问题? 这是可扩展列表适配器。
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;
ExpandableListView exp;
private int[] parentClickStatus ;
GroupHolder groupHolder;
public ExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData,ExpandableListView exp) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
this.exp=exp;
parentClickStatus = new int[6];
setListEvent();
}
private void setListEvent() {
exp.setOnGroupExpandListener(new OnGroupExpandListener() {
@Override
public void onGroupExpand(int arg0) {
parentClickStatus[arg0] = 0;
}
});
exp.setOnGroupCollapseListener(new OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int arg0) {
parentClickStatus[arg0] = 1;
}
});
}
@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(final 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.list_item, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.lblListItem);
txtListChild.setText(childText);
int colorPos = childPosition % 2;
if(colorPos==0)
{
convertView.setBackgroundColor(Color.MAGENTA);
}
else
{
convertView.setBackgroundColor(Color.BLUE);
}
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(final int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
System.out.println("convert view is null");
LayoutInflater infalInflater = (LayoutInflater) this._context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
groupHolder = new GroupHolder();
groupHolder.arrowImg = (ImageView) convertView.findViewById(R.id.imageView1);
groupHolder.lblListHeader = (TextView) convertView.findViewById(R.id.lblListHeader);
groupHolder.lblListHeader.setTypeface(null, Typeface.BOLD);
groupHolder.lblListHeader.setText(headerTitle);
convertView.setTag(groupHolder);
} else {
groupHolder = (GroupHolder) convertView.getTag();
}
/*if ( getChildrenCount( groupPosition ) == 0 ) {
groupHolder.arrowImg.setVisibility( View.INVISIBLE );
}
else {
groupHolder.arrowImg.setImageResource(R.drawable.arrow_down);
}*/
if (parentClickStatus[groupPosition] == 0) {
System.out.println("group position "+groupPosition);
groupHolder.arrowImg.setImageResource(R.drawable.arrow_up);
} else {
System.out.println("else group position "+groupPosition);
groupHolder.arrowImg.setImageResource(R.drawable.arrow_down);
}
return convertView;
}
class GroupHolder {
ImageView arrowImg;
TextView lblListHeader;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
答案 0 :(得分:0)
通过
获取ImageViewImageView imgV = (ImageVIew )convertView.findViewById(R.id.imgVId);
使用
隐藏ImageViewimgV.setVisibility(View.INVISIBLE);
答案 1 :(得分:0)
这是我用来解决这个问题的代码。
if(getChildrenCount(groupPosition)== 0){ ((ImageView)convertView.findViewById(R.id.imageView1))。setVisibility(View.INVISIBLE); } else { ((ImageView)convertView.findViewById(R.id.imageView1))。setVisibility(View.VISIBLE); ((ImageView)convertView.findViewById(R.id.imageView1)) .setImageResource:;(isExpanded R.drawable.arrow_up R.drawable.arrow_down?) }