Android :- Custom ExpandableListView : cannot expa

I'm trying to implement a custom ExpandableListView inside a SherlockFragment. I followed this sample to extend BaseExpandableListAdapter and create my custom adapter.

Here is my problem, when my expandable list is displayed on the screen I can see all the group item, but when I click on one of them, the child item which are supposed to be displayed below it don't show up.

I tried to debug it, the onGroupExpandListener I put in the adapter is never called, and actually I put breakpoints in the different methods of my adapter, there are not called ever when I click on one of the group item.
I tried to modify my xml files which define the group item and the child item, to make them clickable or focus-able, nothing changed. I also tried to remove the editText, Button, and CheckBox I put in there, thinking it was may be creating a conflict ...
I thought the problem was may be due to some incompatibility issues using ExpandableListView with SherlockFragment, but according to the developer's forum its not.

So I really don't know where to look now, it's may be simply a rookie mistake I did in my adapter... Any help would be great,

Thanks in advance!

here is my code:

public class BuildingExpandalbeListAdapter extends BaseExpandableListAdapter {

private Context mContext;
private ExpandableListView mExpandableListView;
private SideEntity[] mSidesCollection;
private int[] groupStatus;

public BuildingExpandalbeListAdapter(Context pContext,
        ExpandableListView pExpandableListView,
        SideEntity[] pSidesCollection) {
    mContext = pContext;
    mSidesCollection = pSidesCollection;
    mExpandableListView = pExpandableListView;
    groupStatus = new int[mSidesCollection.length];
    mExpandableListView.setClickable(true);     
    setListEvent();
}

private void setListEvent() {

    mExpandableListView
            .setOnGroupExpandListener(new OnGroupExpandListener() {

                @Override
                public void onGroupExpand(int arg0) {
                    // TODO Auto-generated method stub
                    groupStatus[arg0] = 1;
                }
            });

    mExpandableListView
            .setOnGroupCollapseListener(new OnGroupCollapseListener() {

                @Override
                public void onGroupCollapse(int arg0) {
                    // TODO Auto-generated method stub
                    groupStatus[arg0] = 0;
                }
            });
}

@Override
public Object getChild(int groupPosition, int childPosition) {
    return mSidesCollection[groupPosition].getSegmentEntity(childPosition)
            .getName();
}

@Override
public long getChildId(int groupPosition, int childPosition) {
    return mSidesCollection[groupPosition].getSegmentEntity(childPosition)
            .getId();
}

@Override
public View getChildView(int groupPosition, int childPosition,
        boolean isLastChild, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    ChildHolder childHolder;
    if (convertView == null) {
        convertView = LayoutInflater.from(mContext).inflate(
                R.layout.building_list_item, null);

        childHolder = new ChildHolder();

        childHolder.editText1 = (EditText) convertView
                .findViewById(R.id.editText1);
        childHolder.checkBox1 = (CheckBox) convertView
                .findViewById(R.id.checkBox1);
        convertView.setTag(childHolder);
    } else {
        childHolder = (ChildHolder) convertView.getTag();
    }

    childHolder.editText1.setText(mSidesCollection[groupPosition]
            .getSegmentEntity(childPosition).getName());
    childHolder.checkBox1.setChecked(mSidesCollection[groupPosition]
            .getSegmentEntity(childPosition).hasDoor());
    return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
    // TODO Auto-generated method stub
    return mSidesCollection[groupPosition].getSegmentsCollection().size();
}

@Override
public Object getGroup(int groupPosition) {
    // TODO Auto-generated method stub
    return mSidesCollection[groupPosition];
}

@Override
public int getGroupCount() {
    // TODO Auto-generated method stub
    return mSidesCollection.length;
}

@Override
public long getGroupId(int groupPosition) {
    // TODO Auto-generated method stub
    return groupPosition;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
        View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    GroupHolder groupHolder;
    if (convertView == null) {
        convertView = LayoutInflater.from(mContext).inflate(
                R.layout.building_list_group, null);
        groupHolder = new GroupHolder();
        groupHolder.editText1 = (EditText) convertView
                .findViewById(R.id.editText1);
        groupHolder.editText2 = (EditText) convertView
                .findViewById(R.id.editText2);
        convertView.setTag(groupHolder);
    } else {
        groupHolder = (GroupHolder) convertView.getTag();
    }

    groupHolder.editText1
            .setText(mSidesCollection[groupPosition].getName());
    groupHolder.editText2.setText(Integer
            .toString(mSidesCollection[groupPosition]
                    .getSegmentsCollection().size()));

    return convertView;
}

class GroupHolder {
    EditText editText1;
    EditText editText2;
}

class ChildHolder {
    EditText editText1;
    CheckBox checkBox1;
}

@Override
public boolean hasStableIds() {
    // TODO Auto-generated method stub
    return true;
}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    // TODO Auto-generated method stub
    return true;
}

}

Here is my SherlockFragment using this adapter :

public class BuildingFragment extends SherlockFragment {

private ViewGroup myViewGroup;
private View v;
private SideEntity[] mSideCollection;

private BuildingsDbAdapter buildingDataBase;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    if (container == null) {
        return null;
    }
    myViewGroup = container;
    myViewGroup.removeAllViews();
    v = inflater.inflate(R.layout.building_data_layout, container, false);
    buildingDataBase = new BuildingsDbAdapter(getSherlockActivity());
    return v;
}

@Override
public void onResume() {
    super.onResume();
    buildingDataBase.open();
    mSideCollection = BuildingsDbAdapter
            .fetchSideMatchingBuildingId(CustomTabFragmentActivity.mBuildingId);
    for (int i = 0; i < mSideCollection.length; i++) {
        BuildingsDbAdapter.fetchSegmentMatchingSideId(
                mSideCollection[i].getId(), mSideCollection[i]);
    }
    ExpandableListView mExpandableListView = (ExpandableListView) v
            .findViewById(R.id.expandableListView1);
    BuildingExpandalbeListAdapter mAdapter = new BuildingExpandalbeListAdapter(
            v.getContext().getApplicationContext(), mExpandableListView,
            mSideCollection);
    mExpandableListView.setAdapter(mAdapter);
    buildingDataBase.close();
}
}

and here is my xml files :

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="0dip"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center_vertical"
        android:layout_marginLeft="10dip"
        android:layout_weight="3"
        android:singleLine="true"
        android:text="Building name: "
        android:textColor="@android:color/black"
        android:textSize="13dip" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="0dip"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center_vertical"
        android:layout_marginLeft="10dip"
        android:layout_weight="4"
        android:singleLine="true"
        android:text="Columbia Tower"
        android:textColor="@android:color/black"
        android:textSize="15dip"
        android:textStyle="italic" />

   <!--  <Button
        android:id="@+id/button1"
        android:layout_width="0dip"
        android:layout_height="30dp"
        android:layout_gravity="right|center_vertical"
        android:layout_marginRight="10dip"
        android:layout_weight="1"
        android:background="@color/honeycombish_blue"
        android:drawableTop="@drawable/edit_query"
        android:gravity="center_vertical|center_horizontal" /> -->
</LinearLayout>

<ExpandableListView
    android:id="@+id/expandableListView1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:scrollbars="none"
    android:divider="@android:color/black"
    android:clipChildren="false"
    android:focusable="true" >
</ExpandableListView>

</LinearLayout>

the group_item :

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:clickable="true"
android:gravity="center_vertical"
android:orientation="vertical" >

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linearLayout1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/RelativeLayout"
    android:layout_marginTop="6dip"
    android:layout_toLeftOf="@+id/button1"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="0dip"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center_vertical"
        android:layout_marginLeft="5dip"
        android:layout_weight="2"
        android:singleLine="true"
        android:text="Side: "
        android:textColor="@android:color/black"
        android:textSize="13dip" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="0dip"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center_vertical"
        android:layout_marginLeft="5dip"
        android:layout_weight="2"
        android:singleLine="true"
        android:textColor="@android:color/black"
        android:textSize="15dip"
        android:textStyle="italic" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="0dip"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center_vertical"
        android:layout_marginLeft="5dip"
        android:layout_weight="5"
        android:singleLine="true"
        android:text="Number of Segment:"
        android:textColor="@android:color/black"
        android:textSize="13dip" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="0dip"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center_vertical"
        android:layout_marginLeft="5dip"
        android:layout_weight="2"
        android:ems="10"
        android:inputType="number"
        android:text="0"
        android:textSize="13dip" />
</LinearLayout>

<Button
    android:id="@+id/button1"
    android:layout_width="30dip"
    android:layout_height="30dip"
    android:layout_alignBottom="@+id/linearLayout1"
    android:layout_alignParentRight="true"
    android:layout_marginLeft="2dip"
    android:background="@android:color/transparent"
    android:drawableBottom="@drawable/ic_edit_shape"
    android:gravity="bottom|center_horizontal" />

</RelativeLayout>

the list_item :

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:orientation="vertical" >

<Button
    android:id="@+id/button1"
    android:layout_width="30dip"
    android:layout_height="30dip"
    android:layout_alignBottom="@+id/linearLayout1"
    android:layout_alignParentLeft="true"
    android:layout_marginLeft="2dip"
    android:background="@android:color/transparent"
    android:drawableBottom="@drawable/ic_edit_shape"
    android:gravity="bottom|center_horizontal" />

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linearLayout1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/RelativeLayout"
    android:layout_marginTop="6dip"
    android:layout_toRightOf="@+id/button1"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="0dip"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center_vertical"
        android:layout_marginLeft="5dip"
        android:layout_weight="2"
        android:singleLine="true"
        android:text="Name: "
        android:textColor="@android:color/black"
        android:textSize="13dip" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="0dip"
        android:layout_height="wrap_content"
        android:layout_gravity="left|center_vertical"
        android:layout_marginLeft="5dip"
        android:layout_weight="2"
        android:singleLine="true"
        android:text="Shop1"
        android:textColor="@android:color/black"
        android:textSize="15dip"
        android:textStyle="italic" />

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="0dip"
        android:layout_height="30dip"
        android:layout_weight="1"
        android:hint="Door" />
</LinearLayout>

</RelativeLayout>

Ok I find my mistake, the problem was in fact coming from both EditText and the Button I have been using in my group items. When I set this widgets to non clickable and non focusable the click on my group items perform normally.

I should have detected this conflict sooner, I tried before to remove both my Button and my EditText, but i forgot that at some point I had try to add android:clickable="true" to my RelativeLayout (thinking it would allowed the click on my group items) but instead it has also created a conflict :/ Anyway, if someone has a similar problem, keep in mind to check if any of your view inside your group item is clickabble or focusable and set them to android:clickable="false" android:focusable="false"