Android 如何在自定义可展开列表视图中从特定组项隐藏组指示符?
我已经在组项目中创建了自定义的可展开列表视图,其中包含文本视图和图像。我想对可展开列表视图中的某些组隐藏组指示符。如何解决此问题? 下面是可扩展列表适配器Android 如何在自定义可展开列表视图中从特定组项隐藏组指示符?,android,expandablelistview,expandablelistadapter,Android,Expandablelistview,Expandablelistadapter,我已经在组项目中创建了自定义的可展开列表视图,其中包含文本视图和图像。我想对可展开列表视图中的某些组隐藏组指示符。如何解决此问题? 下面是可扩展列表适配器 public class ExpandableListAdapter extends BaseExpandableListAdapter { private Context _context; private List<String> _listDataHeader; // header titles /
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;
}
}
在列表中添加ImageView_group.xml
在适配器中检查要隐藏该ImageView的条件。
让ImageView通过
ImageView imgV = (ImageVIew )convertView.findViewById(R.id.imgVId);
使用隐藏ImageView
imgV.setVisibility(View.INVISIBLE);
这是我用来解决这个问题的代码
如果getChildrenCount groupPosition==0{ ImageView convertView.findViewByIdR.id.imageView1.setVisibility View.INVISIBLE; }否则{ ImageView convertView.findViewByIdR.id.imageView1.setVisibility View.VISIBLE; ImageView convertView.findViewByIdR.id.imageView1 .setImageResourcesExpanded?R.drawable.arrow\u up:R.drawable.arrow\u down;
}我想在某些组项目中隐藏groupindicator null,而不是在所有组项目中。如果getChildrenCount groupPosition==0{ImageView convertView.findViewByIdR.id.imageView1.setVisibility View.INVISIBLE;}否则{ImageView convertView.findViewByIdR.id.imageView1.setVisibility View.VISIBLE;ImageView convertView.findViewByIdR.id.imageView1.setImageResourceisExpanded?R.drawable.arrow_up:R.drawable.arrow_down;}您在哪种方法中使用了此逻辑?@user2101858看起来像getGroupView..但OP正在尝试获取groupIndicator..的imageView,而此解决方案不提供。