注意点：1)适配器BaseExpandableListAdapter

2)数据源(数组、集合都行)(重点)

/**

* Created by mb on 2014/11/18.

* 二级菜单适配器

*/

public class MyExpandableListAdapter extends BaseExpandableListAdapter {

private Context context;

List groups;//String [] groups = {};

List> childs; //String [] [] childs = {{},{},};

ViewHolder holder;

public MyExpandableListAdapter(Context context, List groups, List> childs) {

this.context = context;

this.groups = groups;

this.childs = childs;

}

@Override

public int getGroupCount() {

return groups.size();

}

@Override

public int getChildrenCount(int groupPosition) {

return childs.get(groupPosition).size();

}

@Override

public Object getGroup(int groupPosition) {

return groups.get(groupPosition);

}

@Override

public Object getChild(int groupPosition, int childPosition) {

return childs.get(groupPosition).get(childPosition);

}

@Override

public long getGroupId(int groupPosition) {

return groupPosition;

}

@Override

public long getChildId(int groupPosition, int childPosition) {

return childPosition;

}

@Override

public boolean hasStableIds() {

return true;

}

@Override

public View getGroupView(int groupPosition, boolean isExpanded, View convertView1, ViewGroup parent) {

//自定义组视图

return convertView1;

}

@Override

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

//自定义孩子视图

return convertView;

}

@Override

public boolean isChildSelectable(int groupPosition, int childPosition) {

return true;

}

public static class ViewHolder {

//控件

}

}

事件监听：

myExpandableListAdapter = new MyExpandableListAdapter(context, groups, childs);

expandableListView.setAdapter(myExpandableListAdapter);

expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {

@Override

public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {

int count = myExpandableListAdapter.getChildrenCount(groupPosition);

if (count <= 0) {

activity.showCustomToast("...");

}

return false; // ---此处返回true  点击后不能展开组  具体原因知道的留言

}

});

expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

@Override

public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {

return false;

}

});

默认展开所有菜单：

for (int i = 0; i < myExpandableListAdapter.getGroupCount(); i++) {

expandableListView.expandGroup(i);

}