I am implementing a chatting application, where I have made a service to listen all the presence changed. On the change of the presence I want to update the data and I am unable to update the data that is showing in the expandable list view. Please suggest me a means to do the same.

public class UserMenuActivity extends ExpandableListActivity {

    private XMPPConnection connection;
    String name,availability,subscriptionStatus;
    TextView tv_Status;

    /** Variable Define here */
    private String[] data = { "View my profile", "New Multiperson Chat",
            "New Broad Cast Message", "New Contact Category", "New Group",
            "Invite to CCM", "Search", "Expand All", "Settings", "Help",
    "Close" };
    private String[] data_Contact = { "Rename Category","Move Contact to Category", "View my profile",
            "New Multiperson Chat", "New Broad Cast Message",
            "New Contact Category", "New Group", "Invite to CCM", "Search",
            "Expand All", "Settings", "Help", "Close" };
    private String[] data_child_contact = { "Open chat", "Delete Contact","View my profile",
            "New Multiperson Chat", "New Broad Cast Message",
            "New Contact Category", "New Group", "Invite to CCM", "Search",
            "Expand All", "Settings", "Help", "Close" };
    private String[] menuItem = { "Chats", "Contacts", "CGM Groups", "Pending","Request" };
    private List<String> menuItemList = Arrays.asList(menuItem);

    private int commonGroupPosition = 0;
    private String etAlertVal;
    private DatabaseHelper dbHelper;
    private int categoryID, listPos;
    /** New Code here.. */
    private ArrayList<String> groupNames;
    private ArrayList<ArrayList<ChildItems>> childs;
    private UserMenuAdapter adapter;
    private Object object;

    private String[] data2 = { "PIN Michelle", "IP Call" };
    private ListView mlist2;
    private ImageButton mimBtnMenu;
    private LinearLayout mllpopmenu;
    private View popupView;
    private PopupWindow popupWindow;
    private AlertDialog.Builder alert;
    private EditText input;
    private TextView mtvUserName, mtvUserTagLine;
    private ExpandableListView mExpandableListView;
    public static List<CategoryDataClass> categoryList;
    private boolean menuType = false;
    private String childValContact="";
    public static Context context;

    @Override
    public void onBackPressed() {
        if (mllpopmenu.getVisibility() == View.VISIBLE) {
            mllpopmenu.setVisibility(View.INVISIBLE);
        } else {
            if (CCMStaticVariable.CommonConnection.isConnected()) {
                CCMStaticVariable.CommonConnection.disconnect();
            }
            super.onBackPressed();
        }
    }

    @SuppressWarnings("unchecked")
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_MENU) {
            if (mllpopmenu.getVisibility() == View.VISIBLE) {
                mllpopmenu.setVisibility(View.INVISIBLE);
            } else {
                if (commonGroupPosition >= 4 && menuType == true) {
                    if(childValContact == ""){
                        mllpopmenu.setVisibility(View.VISIBLE);

                        mlist2.setAdapter(new ArrayAdapter(UserMenuActivity.this,
                                R.layout.listviewtext, R.id.tvMenuText,
                                data_Contact));

                    }else{
                        mllpopmenu.setVisibility(View.VISIBLE);
                        mlist2.setAdapter(new ArrayAdapter(UserMenuActivity.this,
                                R.layout.listviewtext, R.id.tvMenuText,
                                data_child_contact));

                    }

                } else if (commonGroupPosition == 0) {
                    mllpopmenu.setVisibility(View.VISIBLE);
                    mlist2.setAdapter(new ArrayAdapter(UserMenuActivity.this,
                            R.layout.listviewtext, R.id.tvMenuText, data));
                }
            }
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.usermenulayout);
        dbHelper = new DatabaseHelper(UserMenuActivity.this);

        //this.context = context.getApplicationContext();

        XMPPConn.getContactList();

        connection = CCMStaticVariable.CommonConnection;


        Presence userPresence = new Presence(Presence.Type.available);
        userPresence.setPriority(24);
        userPresence.setMode(Presence.Mode.away);
        connection.sendPacket(userPresence);        


    }

    @Override
    protected void onResume() {
        super.onResume();       
        Presence userPresence = new Presence(Presence.Type.available);
        userPresence.setPriority(24);
        userPresence.setMode(Presence.Mode.away);
        connection.sendPacket(userPresence);
        XMPPConn.getContactList();
        setExpandableListView();
    }

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

        if (groupPosition == 1 && childPosition == 0) {
            startActivity(new Intent(UserMenuActivity.this,
                    InvitetoCCMActivity.class));
        } else if (groupPosition == 1 && childPosition != 0) {
            Intent intent = new Intent(UserMenuActivity.this,
                    UserChatActivity.class);
            intent.putExtra("userNameVal",
                    XMPPConn.mfriendList.get(childPosition - 1).friendName);
            startActivity(intent);
        } else if (groupPosition == 2 && childPosition == 0) {
            startActivity(new Intent(UserMenuActivity.this,
                    CreateGroupActivity.class));
        } else if (groupPosition == 2 && childPosition != 0) {
            String GROUP_NAME = childs.get(groupPosition).get(childPosition)
            .getName().toString();
            int end = GROUP_NAME.indexOf("(");
            CCMStaticVariable.groupName = GROUP_NAME.substring(0, end).trim();
            startActivity(new Intent(UserMenuActivity.this,
                    GroupsActivity.class));
        } else if (groupPosition >= 4) {
            childValContact = childs.get(groupPosition).get(childPosition).getName().trim();
            showToast("user==>"+childValContact, 0);
        }
        return false;
    }

    private void setExpandableListView() {
        /***###############GROUP ARRAY ############################*/
        final ArrayList<String> groupNames = new ArrayList<String>();
        groupNames.add("Chats (2)");
        groupNames.add("Contacts (" + XMPPConn.mfriendList.size() + ")");
        groupNames.add("CGM Groups (" + XMPPConn.mGroupList.size() + ")");
        groupNames.add("Pending (1)");

        XMPPConn.getGroup();
        categoryList = dbHelper.getAllCategory();
        /**Group From Sever*/
        if (XMPPConn.mGroupList.size() > 0) {
            for (int g = 0; g < XMPPConn.mGroupList.size(); g++) {
                XMPPConn.getGroupContact(XMPPConn.mGroupList.get(g).groupName);
                groupNames.add(XMPPConn.mGroupList.get(g).groupName + "("
                        + XMPPConn.mGroupContactList.size()+ ")");
            }
        } 
        if(categoryList.size() > 0){
            for (int cat = 0; cat < categoryList.size(); cat++) {
                groupNames.add(categoryList.get(cat).getCategoryName()+ "(0)");
            }
        }
        this.groupNames = groupNames;

        /*** ###########CHILD ARRAY * #################*/
        ArrayList<ArrayList<ChildItems>> childs = new ArrayList<ArrayList<ChildItems>>();

        ArrayList<ChildItems> child = new ArrayList<ChildItems>();
        child.add(new ChildItems("Alisha", "Hi",0));
        child.add(new ChildItems("Michelle", "Good Morning",0));

        childs.add(child);

        child = new ArrayList<ChildItems>();
        child.add(new ChildItems("", "",0));
        if (XMPPConn.mfriendList.size() > 0) {
            for (int n = 0; n < XMPPConn.mfriendList.size(); n++) {
                child.add(new ChildItems(XMPPConn.mfriendList.get(n).friendNickName,
                        XMPPConn.mfriendList.get(n).friendStatus, 
                        XMPPConn.mfriendList.get(n).friendState));
            }
        }
        childs.add(child);
        /************** CGM Group Child here *********************/
        child = new ArrayList<ChildItems>();
        child.add(new ChildItems("", "",0));

        if (XMPPConn.mGroupList.size() > 0) {
            for (int grop = 0; grop < XMPPConn.mGroupList.size(); grop++) {
                child.add(new ChildItems(
                        XMPPConn.mGroupList.get(grop).groupName + " ("
                        + XMPPConn.mGroupList.get(grop).groupUserCount
                        + ")", "",0));
            }
        }
        childs.add(child);

        child = new ArrayList<ChildItems>();
        child.add(new ChildItems("Shuchi",
                "Pending (Waiting for Authorization)",0));
        childs.add(child);
        /************************ Group Contact List *************************/
        if (XMPPConn.mGroupList.size() > 0) {
            for (int g = 0; g < XMPPConn.mGroupList.size(); g++) {
                /** Contact List */
                XMPPConn.getGroupContact(XMPPConn.mGroupList.get(g).groupName);
                child = new ArrayList<ChildItems>();
                for (int con = 0; con < XMPPConn.mGroupContactList.size(); con++) {
                    child.add(new ChildItems(
                            XMPPConn.mGroupContactList.get(con).friendName,
                            XMPPConn.mGroupContactList.get(con).friendStatus,0));
                }
                childs.add(child);
            }
        } 
        if(categoryList.size() > 0){
            for (int cat = 0; cat < categoryList.size(); cat++) {
                child = new ArrayList<ChildItems>();
                child.add(new ChildItems("-none-", "",0));
                childs.add(child);
            }
        }
        this.childs = childs;

        /** Set Adapter here */
        adapter = new UserMenuAdapter(this, groupNames, childs);
        setListAdapter(adapter);
        object = this;

        mlist2 = (ListView) findViewById(R.id.list2);
        mimBtnMenu = (ImageButton) findViewById(R.id.imBtnMenu);
        mllpopmenu = (LinearLayout) findViewById(R.id.llpopmenu);
        mtvUserName = (TextView) findViewById(R.id.tvUserName);
        mtvUserTagLine = (TextView) findViewById(R.id.tvUserTagLine);

        //Set User name..
        System.out.println("CCMStaticVariable.loginUserName==="
                + CCMStaticVariable.loginUserName);
        if (!CCMStaticVariable.loginUserName.equalsIgnoreCase("")) {
            mtvUserName.setText("" + CCMStaticVariable.loginUserName);
        }
        /** Expandable List set here.. */
        mExpandableListView = (ExpandableListView) this
        .findViewById(android.R.id.list);
        mExpandableListView.setOnGroupClickListener(new OnGroupClickListener() {
            @Override
            public boolean onGroupClick(ExpandableListView parent, View v,
                    int groupPosition, long id) {

                XMPPConn.getContactList();

                if (parent.isGroupExpanded(groupPosition)) {
                    commonGroupPosition = 0;
                }else{
                    commonGroupPosition = groupPosition;
                }
                String GROUP_NAME = groupNames.get(groupPosition);
                int end = groupNames.get(groupPosition).indexOf("(");
                String GROUP_NAME_VALUE = GROUP_NAME.substring(0, end).trim();
                if (menuItemList.contains(GROUP_NAME_VALUE)) {
                    menuType = false;
                    CCMStaticVariable.groupCatName = GROUP_NAME_VALUE;
                } else {
                    menuType = true;
                    CCMStaticVariable.groupCatName = GROUP_NAME_VALUE;
                }
                long findCatId = dbHelper.getCategoryID(GROUP_NAME_VALUE);
                if (findCatId != 0) {
                    categoryID = (int) findCatId;
                }
                childValContact="";
                showToast("Clicked on==" + GROUP_NAME_VALUE, 0);
                return false;
            }
        });

        /** Click on item */
        mlist2.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int pos,long arg3) {
                if (commonGroupPosition >= 4) {
                    if(childValContact == ""){
                        if (pos == 0) {
                            showAlertEdit(CCMStaticVariable.groupCatName);
                        }                   
                        /** Move contact to catgory */
                        if (pos == 1) {
                            startActivity(new Intent(UserMenuActivity.this,AddContactCategoryActivity.class));
                        }
                    }else{
                        if(pos == 0){
                            Intent intent = new Intent(UserMenuActivity.this,UserChatActivity.class);
                            intent.putExtra("userNameVal",childValContact);
                            startActivity(intent);
                        }
                        if(pos == 1){
                            XMPPConn.removeEntry(childValContact);
                            showToast("Contact deleted sucessfully", 0);
                            Intent intent = new Intent(UserMenuActivity.this,UserMenuActivity.class);
                        }
                    }

                } else {
                    /** MyProfile */
                    if (pos == 0) {
                        startActivity(new Intent(UserMenuActivity.this,
                                MyProfileActivity.class));
                    }
                    /** New multiperson chat start */
                    if (pos == 1) {
                        startActivity(new Intent(UserMenuActivity.this,
                                NewMultipersonChatActivity.class));
                    }
                    /** New Broadcast message */
                    if (pos == 2) {
                        startActivity(new Intent(UserMenuActivity.this,
                                NewBroadcastMessageActivity.class));
                    }
                    /** Click on add category */
                    if (pos == 3) {
                        showAlertAdd();
                    }
                    if (pos == 4) {
                        startActivity(new Intent(UserMenuActivity.this,
                                CreateGroupActivity.class));
                    }

                    if (pos == 5) {
                        startActivity(new Intent(UserMenuActivity.this,
                                InvitetoCCMActivity.class));
                    }
                    if (pos == 6) {
                        startActivity(new Intent(UserMenuActivity.this,
                                SearchActivity.class));
                    }
                    if (pos == 7) {
                        onGroupExpand(2);
                        for (int i = 0; i < groupNames.size(); i++) {
                            mExpandableListView.expandGroup(i);
                        }
                    }
                    /** Click on settings */
                    if (pos == 8) {
                        startActivity(new Intent(UserMenuActivity.this,
                                SettingsActivity.class));
                    }
                    if (pos == 10) {
                        System.exit(0);
                    }

                    if (pos == 14) {
                        if (mllpopmenu.getVisibility() == View.VISIBLE) {
                            mllpopmenu.setVisibility(View.INVISIBLE);
                            if (popupWindow.isShowing()) {
                                popupWindow.dismiss();
                            }
                        } else {
                            mllpopmenu.setVisibility(View.VISIBLE);
                            mlist2.setAdapter(new ArrayAdapter(
                                    UserMenuActivity.this,
                                    R.layout.listviewtext, R.id.tvMenuText,
                                    data));
                        }
                    }
                }
            }
        });
    }

    /** Toast message display here.. */
    private void showToast(String msg, int time) {
        Toast.makeText(this, msg, time).show();
    }


    public String showSubscriptionStatus(String friend){
        return friend;


    }

}

Service.class

    public class UpdaterService extends Service {
        private XMPPConnection connection;
        String Friend;
        String user = "";

        @Override
        public IBinder onBind(Intent arg0) {
            // TODO Auto-generated method stub
            return null;
        }

        @Override
        public void onCreate() {
            // Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
            super.onCreate();
        }   

        @Override
        public void onDestroy() {
            // TODO Auto-generated method stub
            super.onDestroy();
        }

        @Override
        public void onStart(Intent intent, int startId) {
            // TODO Auto-generated method stub
            showToast("My Service Started", 0);
            connection = getConnection();
            if (connection.isConnected()) {
                final Roster roster = connection.getRoster();
                RosterListener r1 = new RosterListener() {

                    @Override
                    public void presenceChanged(Presence presence) {
                        // TODO Auto-generated method stub
                        XMPPConn.getContactList();

                    }

                    @Override
                    public void entriesUpdated(Collection<String> arg0) {
                        // TODO Auto-generated method stub
                        //notification("entriesUpdated");
                    }

                    @Override
                    public void entriesDeleted(Collection<String> arg0) {
                        // TODO Auto-generated method stub
                        //notification("entriesDeleted");
                    }


                    @Override
                    public void entriesAdded(Collection<String> arg0) {
                        // TODO Auto-generated method stub
                        Iterator<String> it = arg0.iterator();
                        if (it.hasNext()) {
                            user = it.next();
                        }
                        RosterEntry entry = roster.getEntry(user);
                        if(entry.getType().toString().equalsIgnoreCase("to")){
                            int index_of_Alpha = Friend.indexOf("@");
                            String subID = Friend.substring(0, index_of_Alpha);

                            notification("Hi "+subID+" wants to add you");
                        }               
                    }
                };

                if (roster != null) {
                    roster.setSubscriptionMode(Roster.SubscriptionMode.manual);
                    System.out.println("subscription going on");
                    roster.addRosterListener(r1);
                }

            } else {
                showToast("Connection lost-", 0);
            }
        }

        protected void showToast(String msg, int time) {
            Toast.makeText(this, msg, time).show();
        }

        private XMPPConnection getConnection() {
            return CCMStaticVariable.CommonConnection;
        }

        /** Notification manager */
        private void notification(CharSequence message) {

            String ns = Context.NOTIFICATION_SERVICE;
            NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);
            int icon = R.drawable.ic_launcher;
            CharSequence tickerText = message;
            long when = System.currentTimeMillis();
            Notification notification = new Notification(icon, tickerText, when);
            Context context = getApplicationContext();



            CharSequence contentTitle = "CCM";
            CharSequence contentText = message;
            Intent notificationIntent = new Intent(this, ManageNotification.class);
            notificationIntent.putExtra("Subscriber_ID",user );

            PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
                    notificationIntent, 0);
            notification.setLatestEventInfo(context, contentTitle, contentText,
                    contentIntent);
            notification.flags |= Notification.FLAG_AUTO_CANCEL;
            final int HELLO_ID = 1;
            mNotificationManager.notify(HELLO_ID, notification);

        }

}

Here is my adapter class

public class UserMenuAdapter extends BaseExpandableListAdapter {

    private ArrayList<String> groups;
    private ArrayList<ArrayList<ChildItems>> childs;
    private Context context;
    public LayoutInflater inflater;

    ImageView img_availabiliy;

    private static final int[] EMPTY_STATE_SET = {};
    private static final int[] GROUP_EXPANDED_STATE_SET =
            {android.R.attr.state_expanded};
    private static final int[][] GROUP_STATE_SETS = {
         EMPTY_STATE_SET, // 0
         GROUP_EXPANDED_STATE_SET // 1
    };

    public UserMenuAdapter(Context context, ArrayList<String> groups,
            ArrayList<ArrayList<ChildItems>> childs) {
        this.context = context;
        this.groups = groups;
        this.childs = childs;
        inflater = LayoutInflater.from(context);
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return childs.get(groupPosition).get(childPosition);
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return (long) (groupPosition * 1024 + childPosition);
    }

    @Override
    public View getChildView(int groupPosition, int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent) {
        View v = null;
        if (convertView != null)
            v = convertView;
        else
            v = inflater.inflate(R.layout.child_layout, parent, false);
        ChildItems ci = (ChildItems) getChild(groupPosition, childPosition);
        TextView tv = (TextView) v.findViewById(R.id.tvChild);
        tv.setText(ci.getName());
        TextView tv2 = (TextView) v.findViewById(R.id.tvChild2);
        tv2.setText(ci.getDailyStatus());
        img_availabiliy = (ImageView)v.findViewById(R.id.img_childlayout_AVAILABILITY);
        ImageView friendPics = (ImageView)v.findViewById(R.id.ivFriendPics);


        if(ci.getStatusState() == 1){
            img_availabiliy.setImageResource(R.drawable.online);
        }
        else if(ci.getStatusState()==0){
            img_availabiliy.setImageResource(R.drawable.offline);           
        }           
        else if (ci.getStatusState()==2) {
            img_availabiliy.setImageResource(R.drawable.away);
        }       
        else if(ci.getStatusState()==3){
            img_availabiliy.setImageResource(R.drawable.busy);
        }
        else{
            img_availabiliy.setImageDrawable(null);
        }       
        if((groupPosition == 1 && childPosition == 0)){
            friendPics.setImageResource(R.drawable.inviteto_ccm);
            img_availabiliy.setVisibility(View.INVISIBLE);
        }
        else if(groupPosition == 2 && childPosition == 0){
            friendPics.setImageResource(R.drawable.new_ccmgroup);
            img_availabiliy.setVisibility(View.VISIBLE);            
        }else{
            if(ci.getPicture()!= null){
                Bitmap bitmap = BitmapFactory.decodeByteArray(ci.getPicture(), 0, ci.getPicture().length);
                bitmap = Bitmap.createScaledBitmap(bitmap, 50, 50, true);
                friendPics.setImageBitmap(bitmap);
            }else{
                friendPics.setImageResource(R.drawable.avatar);
            }

            img_availabiliy.setVisibility(View.VISIBLE);
        }
        return v;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return childs.get(groupPosition).size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return groups.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        return groups.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        return (long) (groupPosition * 1024); 
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent) {
        View v = null;
        if (convertView != null)
            v = convertView;
        else
            v = inflater.inflate(R.layout.group_layout, parent, false);
        String gt = (String) getGroup(groupPosition);
        TextView tv2 = (TextView) v.findViewById(R.id.tvGroup);
        if (gt != null)
            tv2.setText(gt);
        /**Set Image on group layout, Max/min*/
        View ind = v.findViewById( R.id.explist_indicator);
        View groupInd = v.findViewById( R.id.llgroup);
        if( ind != null ) {
            ImageView indicator = (ImageView)ind;           
            if( getChildrenCount( groupPosition ) == 0 ) {
                indicator.setVisibility( View.INVISIBLE );
            } else {
                indicator.setVisibility( View.VISIBLE );
                int stateSetIndex = ( isExpanded ? 1 : 0) ;
                Drawable drawable = indicator.getDrawable();
                drawable.setState(GROUP_STATE_SETS[stateSetIndex]);
            }
        }
        if( groupInd != null ) {
            RelativeLayout indicator2 = (RelativeLayout)groupInd;
            if( getChildrenCount( groupPosition ) == 0 ) {
                indicator2.setVisibility( View.INVISIBLE );             
            } else {
                indicator2.setVisibility( View.VISIBLE );
                int stateSetIndex = ( isExpanded ? 1 : 0) ;
                Drawable drawable2 = indicator2.getBackground();                
                drawable2.setState(GROUP_STATE_SETS[stateSetIndex]);
            }
        }
        return v;
    }

    @Override
    public boolean hasStableIds() {
        return true;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }

    public void onGroupCollapsed(int groupPosition) {
    }

    public void onGroupExpanded(int groupPosition) {
    }

}

I just want to update my list in ON PRESENCE CHANGED method in the Service class.. Please suggest me a means to do the same.