Android :: How To Access Email Addresses In Application?

I have the following code through which I am able to retrieve phone numbers. Somehow, I am not able to retrieve email addresses by using android.provider.Contacts.People API.

import android.app.AlertDialog;
import android.app.ExpandableListActivity;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Contacts.People;
import android.view.View;
import android.widget.ExpandableListAdapter;
import android.widget.SimpleCursorTreeAdapter;
import android.widget.TextView;
import android.widget.ExpandableListView.OnChildClickListener;

public class ShowContacts extends ExpandableListActivity implements OnChildClickListener { private int mGroupIdColumnIndex;
private String mPhoneNumberProjection[] = new String[] { People.Phones._ID, People.NUMBER // CHANGE HERE }; private ExpandableListAdapter mAdapter;
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
// Query for people Cursor groupCursor = managedQuery(People.CONTENT_URI,
new String[] {People._ID, People.NAME}, null, null, null);
// Cache the ID column index mGroupIdColumnIndex = groupCursor.getColumnIndexOrThrow(People._ID);
// Set up our adapter mAdapter = new MyExpandableListAdapter(groupCursor, this,
android.R.layout.simple_expandable_list_item_1,
android.R.layout.simple_expandable_list_item_1,
new String[] {People.NAME}, // Name for group layouts
new int[] {android.R.id.text1},
new String[] {People.NUMBER}, // AND CHANGE HERE
new int[] {android.R.id.text1});
setListAdapter(mAdapter); }
public class MyExpandableListAdapter extends SimpleCursorTreeAdapter {
public MyExpandableListAdapter(Cursor cursor, Context context, int groupLayout,
int childLayout, String[] groupFrom, int[] groupTo, String[] childrenFrom,
int[] childrenTo) { super(context, cursor, groupLayout, groupFrom, groupTo, childLayout, childrenFrom, childrenTo);
} @Override protected Cursor getChildrenCursor(Cursor groupCursor) {
// Given the group, we return a cursor for all the children within that group
// Return a cursor that points to this contact's phone numbers
Uri.Builder builder = People.CONTENT_URI.buildUpon();
ContentUris.appendId(builder, groupCursor.getLong(mGroupIdColumnIndex));
builder.appendEncodedPath(People.Phones.CONTENT_DIRECTORY);
Uri phoneNumbersUri = builder.build();
return managedQuery(phoneNumbersUri, mPhoneNumberProjection, null, null, null);
} } @Override public boolean onChildClick(android.widget.ExpandableListView parent,
View v, int groupPosition, int childPosition, long id) {
AlertDialog dialog = new AlertDialog.Builder(ShowContacts.this)
.setMessage(((TextView) v).getText().toString())
.setPositiveButton("OK", null).create();
dialog.show(); return true; } }