Question

I have stored the names and friends in database.

For example ,

person A,and his friends B,C,D 
person Z,and his friends K,L,M 
person Q,and his friends P,O,N 

How to retrieve values from database and display in a expandable listview.

i,e.Person A,Z,Q should be the group names and corresponding friends should be the child Name ….

Thanks in advance

Answer 1

Create wrapper for your person

public class Person {

    String name;
    String[] friends;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String[] getFriends() {
        return friends;
    }

    public void setFriends(String[] friends) {
        this.friends = friends;
    }

}

Then put person name to your ParentView
and Friends to a Child in the BaseExpandableListAdapter

public class ExpandableListAdapter extends BaseExpandableListAdapter {
List<Person>persons; // fill persons

public View getGroupView(int groupPosition, boolean isExpanded,
                View convertView, ViewGroup parent) {
persons.get(groupPosition).getName();
}

public View getChildView(int groupPosition, int childPosition,
                boolean isLastChild, View convertView, ViewGroup parent) {
persons.get(groupPosition).getFriends();
}