在做三级列表的时候，用的是ExpandableListView里套一个ExpandableListView，由于里面的ExpandableListView把图标隐藏了……点又点不开，就以为是里面的ExpandableListView失效，弄了三小时，才想到把图标显示出来，，结果……已经打开了，郁闷得要死了，，，然后知道是因为没有位置的原因了……哎，，记下，别以后还杨白劳三个小时……
public class EGuideFourAdapter extends BaseExpandableListAdapter {
private Context mContext;
private List<NamedList> list;
public EGuideFourAdapter(Context context, List<NamedList> list) {
this.list = list;
this.mContext = context;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return list.get(groupPosition).getChildList().get(childPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childPosition;
}
static public TextView getTextView(Context context) {// 控制所有级的菜单，如果各级有另外设置，实现的是另外的设置。
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, 90);
TextView textView = new TextView(context);
textView.setLayoutParams(lp);
textView.setTextSize(17);
textView.setTextColor(Color.BLACK);
textView.setPadding(10, 5, 0, 5);
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
return textView;
}
/**
* 三层树结构中的第二层是一个ExpandableListView
*/
public View getChildView(final int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if (list.get(groupPosition).getChildList().get(childPosition)
.getChildList().size() > 0) {// 该项是否有第三级
// 是
final ExpandableListView examGuidView = getExpandableListView();
examGuidView.setGroupIndicator(null);
examGuidView.setPadding(pixelsToDip(mContext,25), 0, 0, 0);
final ExamGuideAdapter examGuideAdapter = new ExamGuideAdapter(
this.mContext, list.get(groupPosition).getChildList());
// list.get(groupPosition).getChildList()为第二级的list
examGuidView.setAdapter(examGuideAdapter);
// 点击第三级时，
examGuidView.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPositionTwo, int childPosition, long id) {
// 获取第四级列表项
List<NamedList> eGlist = list.get(groupPosition)
.getChildList().get(groupPositionTwo)
.getChildList().get(childPosition).getChildList();
// 获取第三级标题
String title = list.get(groupPosition).getChildList()
.get(groupPositionTwo).getChildList()
.get(childPosition).getName();
if (eGlist.size() > 0) {// 第四级不是详细内容
Intent intent = new Intent(mContext,
UIExamGuideFour.class);
intent.putExtra("list", (Serializable) eGlist);
intent.putExtra("title", title);
mContext.startActivity(intent);
} else {
Intent intent = new Intent(mContext,
UIExamGuideContent.class);
intent.putExtra("title", title);
mContext.startActivity(intent);
}
return false;
}
});
/**
* 重点：没有这个方法第三级会没有位置，所以会看不到，误以为ExpandableListView失效
* 关键点：第二级菜单展开时通过取得节点数来设置第三级菜单的大小
*/
examGuidView.setOnGroupExpandListener(new OnGroupExpandListener() {
int i = 0;
@Override
public void onGroupExpand(int groupPosition) {
i = (list.get(groupPosition).getChildList()
.get(childPosition).getChildList().size() + 1) * 90 + 30;
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, i);
examGuidView.setLayoutParams(lp);
}
});
/**
* 第二级菜单回收时设置为标准Item大小
*/
examGuidView
.setOnGroupCollapseListener(new OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, 90);
examGuidView.setLayoutParams(lp);
}
});
return examGuidView;
} else {
TextView textView = getTextView(mContext);
ExamGuide named = (ExamGuide) list.get(groupPosition)
.getChildList().get(childPosition);
textView.setTextColor(Color.BLACK);
textView.setText(named.getName());
// textView.setTag(temp[1]);
// textView.setText(getChild(groupPosition,
// childPosition).toString());
textView.setPadding(pixelsToDip(mContext,55), 0, 0, 0);// 第一个参数原来为：
// myPaddingLeft+PaddingLeft
// ，是设置第三级菜单文字离左边的距离。
return textView;
}
}
public ExpandableListView getExpandableListView() {
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, 90);
ExpandableListView superTreeView = new ExpandableListView(mContext);
superTreeView.setLayoutParams(lp);
return superTreeView;
}
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
TextView textView = getTextView(mContext);
ExamGuide named = (ExamGuide) list.get(groupPosition);
textView.setText(named.getName());
textView.setPadding(pixelsToDip(mContext,40), 0, 0, 0);// 第一个参数原来为：myPaddingLeft+(PaddingLeft>>1)
// ，是设置第二级菜单文字离左边的距离。
textView.setTextColor(Color.BLACK);
return textView;
}
//像素转dip解决分辨率问题
private int pixelsToDip(Context context,int Pixels) {
int dip=(int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, Pixels, context.getResources().getDisplayMetrics());
return dip;
}
/**
* 第二级点击打开第三级
*
* @param examGuidView
* @param groupPosition
*/
public void clickEvent(ExpandableListView examGuidView, int groupPosition) {
examGuidView.expandGroup(groupPosition);
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return list.get(groupPosition).getChildList().size();
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return list.get(groupPosition);
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return list.size();
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean isChildSelectable(int p, int id) {
// TODO Auto-generated method stub
return true;
}