ExpandableListView实现多级菜单

1.数据为树形结构。

2.在BaseExpandableListAdapter的getChildView(int groupPosition, int childPosition,

            boolean isLastChild, View convertView, ViewGroup parent)方法中，判断子节点是否为叶子节点。

   如果是子节点是叶子节点，生成子界面。如果是树节点，则生成ExpandableListView。形成递归。

@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {

if(getChildType(groupPosition, childPosition)==TYPE_DEPT){
int deptposition = childPosition-mData.get(groupPosition).getPoliceOfficers().size();
convertView = mInflater.inflate(R.layout.police_subdept_item_layout, null);
ExpandableListView expandableListView = (ExpandableListView) convertView.findViewById(R.id.ex_lv_contacts);

PoliceDept subDept =  mData.get(groupPosition).getPoliceDepts().get(deptposition);
List<PoliceDept> data = new ArrayList<PoliceDept>();
data.add(subDept);
final ContactsExpandableAdapter adapter = new ContactsExpandableAdapter(mContext,data);
expandableListView.setAdapter(adapter);
expandableListView.setOnChildClickListener(new OnChildClickListener() {

@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
PoliceOfficer policeOfficer = adapter.getChild(groupPosition, childPosition);
LogUtils.e("", ""+policeOfficer.getName());
return false;
}
});
}else{
ChildViewHolder holder = null;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.police_officer_item_layout, null);
holder = new ChildViewHolder();
holder.name = (TextView) convertView.findViewById(R.id.tv_police_officer_name);
holder.mobilePhoe = (TextView) convertView.findViewById(R.id.tv_police_officer_position);
holder.phone = (TextView) convertView.findViewById(R.id.tv_police_officer_phone);
convertView.setTag(holder);
} else {
holder = (ChildViewHolder) convertView.getTag();
}
holder.name.setText(getChild(groupPosition, childPosition)
.getName());
holder.mobilePhoe.setText(getChild(groupPosition, childPosition)
.getPosition());
holder.phone.setText(getChild(groupPosition, childPosition)
.getPhone());
}

return convertView;
}

3.子节点的ExpandableListView必须经过处理，才能展开。

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ExpandableListView;

/**
* 自定义的ExpandableListView
* @author lyixin@linewell.com
* @since 2014年12月16日
*/
public class CustExpListview extends ExpandableListView {

public CustExpListview(Context context) {
super(context);
}

public CustExpListview(Context context, AttributeSet attrs) {
super(context, attrs);
}

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
//解决嵌套的ExpandableListView不能展开问题
heightMeasureSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE,
MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}