layout_width="fill_parent"android:
layout_height="wrap_content"android:
id="@+id/btnDirectoryActivity"android:
text="@string/directory_activity"/>
Directory.java
packagecom.wpirl.activity;
importjava.util.Arrays;
importandroid.app.ExpandableListActivity;
importandroid.content.Intent;
importandroid.os.Bundle;
importandroid.view.ContextMenu;
importandroid.view.Gravity;
importandroid.view.Menu;
importandroid.view.MenuItem;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.view.ContextMenu.ContextMenuInfo;
importandroid.widget.AbsListView;
importandroid.widget.BaseExpandableListAdapter;
importandroid.widget.ExpandableListAdapter;
importandroid.widget.ExpandableListView;
importandroid.widget.TextView;
importandroid.widget.Toast;
importandroid.widget.ExpandableListView.ExpandableListContextMenuInfo;
importcom.wpirl.map.GraphNode;
importcom.wpirl.map.Map;
publicclassDirectoryActivityextendsExpandableListActivity
{
privatestaticfinalintMENU_VIEW_DETAIL=Menu.FIRST+1;
privatestaticfinalintMENU_FROM_HERE=Menu.FIRST+2;
privatestaticfinalintMENU_TO_HERE=Menu.FIRST+3;
//Sampledataset.children[i]containsthechildren（String[]）forgroups[i].privatefinalString[]groups={"Room","Name"};
privateString[][]children=newString[2][];
ExpandableListAdapteradapter;
@OverridepublicvoidonCreate（BundlesavedInstanceState）
{
super.onCreate（savedInstanceState）;
//Setupouradapter
adapter=newDirectoryExpandableListAdapter（）;
children[0]=Map.getRooms（）;
Arrays.sort（children[0]）;
children[1]=Map.getPeople（）;
Arrays.sort（children[1]）;
setListAdapter（adapter）;
registerForContextMenu（getExpandableListView（））;
}
@OverridepublicvoidonCreateContextMenu（ContextMenumenu,Viewv,ContextMenuInfomenuInfo）{menu.setHeaderTitle（"Menu"）;
menu.add（0,MENU_VIEW_DETAIL,0,"ViewDetail"）;
menu.add（0,MENU_FROM_HERE,0,"FromHere"）;
menu.add（0,MENU_TO_HERE,0,"ToHere"）;
}
@OverridepublicbooleanonContextItemSelected（MenuItemitem）{ExpandableListContextMenuInfoinfo=（ExpandableListContextMenuInfo）item.getMenuInfo（）;
Stringtitle=（（TextView）info.targetView）.getText（）.toString（）;inttype=ExpandableListView.getPackedPositionType（info.packedPosition）;
intid=item.getItemId（）;
/**Ifthemenuclickedisthechild*/
if（type==ExpandableListView.PACKED_POSITION_TYPE_CHILD）
{
GraphNodenode=Map.searchDetail（title）;
switch（id）
{
caseMENU_VIEW_DETAIL:
StringBuildersb=newStringBuilder（）;
sb.append（"Detailinformation\n"）;
sb.append（"RoomID:
"+node.room+"\n"）;
sb.append（"Name:
"+node.person+"\n"）;
Toast.makeText（this,sb.toString（）,Toast.LENGTH_LONG）.show（）;
break;
caseMENU_FROM_HERE:
Map.setRoutingSource（node）;
startActivity（newIntent（this,RouteActivity.class））;
break;
caseMENU_TO_HERE:
Map.setRoutingDestination（node）;
startActivity（newIntent（this,RouteActivity.class））;
break;
}
returntrue;
/**Ifthemenuclickedisthegroup*/
}
elseif（type==ExpandableListView.PACKED_POSITION_TYPE_GROUP）
{
intgroupPos=ExpandableListView.getPackedPositionGroup（info.packedPosition）;
if（groupPos==0）{Toast.makeText（this,"Thisgroupcontainsthelistofroomsinthisbuilding",Toast.LENGTH_SHORT）.show（）;
}
else{Toast.makeText（this,"Thisgroupcontainsthelistofnamesinthisbuilding",
Toast.LENGTH_SHORT）.show（）;
}
returntrue;
}
returnfalse;
}
/****/
publicclassDirectoryExpandableListAdapterextendsBaseExpandableListAdapter{publicObjectgetChild（intgroupPosition,intchildPosition）{returnchildren[groupPosition][childPosition];
}
publiclonggetChildId（intgroupPosition,intchildPosition）
{
returnchildPosition;
}
publicintgetChildrenCount（intgroupPosition）
{
returnchildren[groupPosition].length;
}
publicTextViewgetGenericView（）
{
//LayoutparametersfortheExpandableListView
AbsListView.LayoutParamslp=newAbsListView.LayoutParams（ViewGroup.LayoutParams.FILL_PARENT,64）;
TextViewtextView=newTextView（DirectoryActivity.this）;
textView.setLayoutParams（lp）;
//Centerthetextvertically
textView.setGravity（Gravity.CENTER_VERTICAL|Gravity.LEFT）;
//Setthetextstartingposition
textView.setPadding（36,0,0,0）;
returntextView;
}
publicViewgetChildView（intgroupPosition,intchildPosition,booleanisLastChild,ViewconvertView,ViewGroupparent）
{
TextViewtextView=getGenericView（）;
textView.setText（getChild（groupPosition,childPosition）.toString（））;
returntextView;
}
publicObjectgetGroup（intgroupPosition）
{
returngroups[groupPosition];
}
publicintgetGroupCount（）
{
returngroups.length;
}
publiclonggetGroupId（intgroupPosition）
{
returngroupPosition;
}
publicViewgetGroupView（intgroupPosition,booleanisExpanded,ViewconvertView,ViewGroupparent）{TextViewtextView=getGenericView（）;
textView.setText（getGroup（groupPosition）.toString（））;returntextView;
}
publicbooleanisChildSelectable（intgroupPosition,intchildPosition）
{
returntrue;
}
publicbooleanhasStableIds（）
{
returntrue;
}
}
}
RouteActivity.java
packagecom.wpirl.activity;
importandroid.app.Activity;
importandroid.content.Intent;
importandroid.os.Bundle;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.ArrayAdapter;
importandroid.widget.AutoCompleteTextView;
importandroid.widget.Button;
importandroid.widget.Toast;
importcom.wpirl.R;
importcom.wpirl.map.GraphNode;
importcom.wpirl.map.Map;
publicclassRouteActivity
extendsActivity
implementsOnClickListener
{
privateGraphNodesource;
privateGraphNodedestination;
privateAutoCompleteTextViewtextViewSource;
privateAutoCompleteTextViewtextViewDestination;
privateButtonbtnSearch;
@Override
protectedvoidonCreate（BundlesavedInstanceState）
{
super.onCreate（savedInstanceState）;
setContentView（R.layout.route）;
String[]database=Map.getDatabase（Map.DATABASE_PERSON+Map.DATABASE_ROOM）;ArrayAdapteradapter=newArrayAdapter（this,android.R.layout.simple_dropdown_item_1line,database）;
btnSearch=（Button）findViewById（R.id.btnSearchRoute）;btnSearch.setOnClickListener（this）;
textViewSource=（AutoCompleteTextView）findViewById（R.id.editSource）;textViewSource.setAdapter（adapter）;
textViewDestination=（AutoCompleteTextView）findViewById（R.id.edi
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