controlling buttons in different group of ExpandableListView - android-layout

Question

I have a program in android and i have a button on the group of expandableListView,I have 4 groups, so i need to control those 4 buttons individually, different activities for each.
Can anyone help me?
Code for MainActivity:
public class MainActivity extends Activity {
final Context context = this;
private static final String[][] data = {{" "},{"a1","a2"},{"s1","s2","s3"},{"t1","t2","t3"}};
private ExpandableListView expandableListView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
expandableListView = (ExpandableListView)findViewById(R.id.lvExp);
expandableListView.setAdapter(new ExpandableListAdapter(context, this, data));
}
Here`s my code for Adapter:
class ExpandableListAdapter extends BaseExpandableListAdapter {
public Context context;
CheckBox checkBox;
private LayoutInflater vi;
private String[][] data;
int _objInt;
public static Boolean checked[] = new Boolean[1];
HashMap<Long,Boolean> checkboxMap = new HashMap<Long,Boolean>();
private static final int GROUP_ITEM_RESOURCE = R.layout.list_group;
private static final int CHILD_ITEM_RESOURCE = R.layout.list_item;
public String []check_string_array;
public ExpandableListAdapter(Context context, Activity activity, String[][] data) {
this.data = data;
this.context = context;
vi = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
_objInt = data.length;
check_string_array = new String[_objInt];
popolaCheckMap();
}
public void popolaCheckMap(){
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(context);
String buffer = null;
for(int i=0; i<_objInt; i++){
buffer = settings.getString(String.valueOf((int)i),"false");
if(buffer.equals("false"))
checkboxMap.put((long)i, false);
else checkboxMap.put((long)i, true);
}
}
public class CheckListener implements OnCheckedChangeListener{
long pos;
public void setPosition(long p){
pos = p;
}
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
Log.i("checkListenerChanged", String.valueOf(pos)+":"+String.valueOf(isChecked));
checkboxMap.put(pos, isChecked);
if(isChecked == true) check_string_array[(int)pos] = "true";
else check_string_array[(int)pos] = "false";
// save checkbox state of each group
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(context);
SharedPreferences.Editor preferencesEditor = settings.edit();
preferencesEditor.putString(String.valueOf((int)pos), check_string_array[(int)pos]);
preferencesEditor.commit();
}
}
public String getChild(int groupPosition, int childPosition) {
return data[groupPosition][childPosition];
}
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
public int getChildrenCount(int groupPosition) {
return data[groupPosition].length;
}
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
View v = convertView;
String child = getChild(groupPosition, childPosition);
int id_res = 0;
if(groupPosition == 0){
if(childPosition == 0) id_res = R.drawable.ic_launcher;
}
else if(groupPosition == 1){
}
else if(groupPosition == 2){
}
else if(groupPosition == 3){
}
if (child != null) {
v = vi.inflate(CHILD_ITEM_RESOURCE, null);
ViewHolder holder = new ViewHolder(v);
holder.text.setText(Html.fromHtml(child));
holder.imageview.setImageResource(id_res);
}
return v;
}
public String getGroup(int groupPosition) {
return "group-" + groupPosition;
}
public int getGroupCount() {
return data.length;
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
View v = convertView;
String group = null;
int id_res = 0;
long group_id = getGroupId(groupPosition);
if(group_id == 0){
group = "Power Consumption";
}
else if(group_id == 1){
group = "Appliances";
}
else if(group_id == 2){
group = "Scenes";
}
else if(group_id == 3){
group = "Triggers";
}
if (group != null) {
v = vi.inflate(GROUP_ITEM_RESOURCE, null);
ViewHolder holder = new ViewHolder(v);
holder.text.setText(Html.fromHtml(group));
holder.imageview.setImageResource(id_res);
holder.imageview.setFocusable(false);
CheckListener checkL = new CheckListener();
checkL.setPosition(group_id);
}
return v;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public boolean hasStableIds() {
return true;
}
}
class ViewHolder {
public TextView text;
public ImageView imageview;
public ViewHolder(View v) {
this.text = (TextView)v.findViewById(R.id.text1);
this.imageview = (ImageView)v.findViewById(R.id.image1);
}
}