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private ExpandableListView mDrawerListView;private List mainActions = new ArrayList();private HashMap childActions = new HashMap();

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

View v = inflater.inflate(R.layout.frg_navigation_drawer, container, false);

assert v != null;

mDrawerListView = (ExpandableListView) v.findViewById(R.id.elvHome); mDrawerListView.setGroupIndicator(null);

// add first title mainActions.add(new TitoloGruppo("Good guys")); // 0 mainActions.add(new Azione("Admiral Ackbar", "Dagobah System")); // 1 mainActions.add(new Azione("Han Solo", "Millenium Falcon")); // 2 mainActions.add(new Azione("Yoda", "Dagobah System")); // 3 // add second title mainActions.add(new TitoloGruppo("Bad guys")); // 4 mainActions.add(new Azione("Emperor", "Death star 2")); // 5 mainActions.add(new Azione("Jabba", "Tatooine")); // 6

mainActions.add(new Azione("Grand Moff Tarkin", "Death star 1")); // 7

// Adding child quotes to Ackbar List mainSubFive = new ArrayList(); mainSubFive.add("It's a trap!");

// Adding child quotes to Yoda List mainSubThree = new ArrayList(); mainSubThree.add("Do or do not; there is no try."); mainSubThree.add("There is another Sky walker."); mainSubThree.add("When 900 years old you reach, look as good you will not ehh.");

childActions.put(0, new ArrayList()); childActions.put(1, mainSubFive); childActions.put(2, new ArrayList()); childActions.put(3, mainSubThree); childActions.put(4, new ArrayList()); childActions.put(5, new ArrayList()); childActions.put(6, new ArrayList());

mDrawerListView.setAdapter(new ExpandableAdapter(getActivity(), mainActions,childActions)); mDrawerListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() { @Override

public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { List list = childActions.get(groupPosition); if(list.size() > 0) return false; else Toast.makeText(getActivity(), ""+ ((Azione) mainActions.get(groupPosition)).getSubtitle(), Toast.LENGTH_LONG).show(); return false; }

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});

mDrawerListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { List list = childActions.get(groupPosition);

Toast.makeText(getActivity(), "" + list.get(childPosition).toString(), Toast.LENGTH_LONG).show(); return false; } }); return v;}

// ---------------------------------------------------------------------------------------------// INTERNAL CLASS// ---------------------------------------------------------------------------------------------

protected class ExpandableAdapter extends BaseExpandableListAdapter {

private Context context; private List mainElements; private HashMap childElements; private LayoutInflater vi;

public ExpandableAdapter(Context context, List mainElements, HashMap childElements) { this.context = context; this.mainElements = mainElements; this.childElements = childElements; vi = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SE

RVICE); }

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

@Override public int getChildrenCount(int groupPosition) { if(this.childElements.get(groupPosition) == null) return 0; return this.childElements.get(groupPosition).size();

}

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

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

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}

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

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

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

@Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { View v = convertView;

final Elemento i = mainElements.get(groupPosition); if (i != null) {

if(i.isGroupSection()){ final TitoloGruppo si = (TitoloGruppo)i; v = vi.inflate(android.R.layout.simple_list_item_1, null); v.setOnClickListener(null); v.setOnLongClickListener(null); v.setLongClickable(false); final TextView sectionView = (TextView) v.findViewById(android.R.id.text1); sectionView.setTextColor(Color.parseColor("#FFC800")); sectionView.setText(si.getTitle()); }else if(i.isAction()){ Azione ei = (Azione)i; v = vi.inflate(android.R.layout.simple_list_item_2, null);

final TextView title = (TextView)v.findViewById(android.R.id.text1); final TextView subtitle = (TextView)v.findViewById(android.R.id.text2);

if (title != null) title.setText(ei.title); if(subtitle != null) subtitle.setText("count: " + getChildrenCount(groupPosition)); } } return v;

}

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

final String childText = (String) getChild(groupPosition, childPosition);

if (convertView == null) {

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LayoutInflater infalInflater = (LayoutInflater) this.context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = infalInflater.inflate(android.R.layout.simple_list_item_1, null); }

TextView txtListChild = (TextView) convertView.findViewById(android.R.id.text1); txtListChild.setText(childText); return convertView; }

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

public class TitoloGruppo implements Elemento {

private final String titolo;

public TitoloGruppo(String titolo) { this.titolo = titolo;

}

public String getTitle(){ return titolo; }

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

@Override public boolean isAction() {

return false; }}

protected interface Elemento { public boolean isGroupSection(); public boolean isAction();}

protected class Azione implements Elemento { public final String title; public final String subtitle;

public Azione(String title, String subtitle) { this.title = title; this.subtitle = subtitle; }

public String getTitle() { return this.title; }

public String getSubtitle() {

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return this.subtitle; }

@Override public boolean isGroupSection() { return false; }

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