Get Email from Contacts database

Last exercise demonstrate how to "Access ContactsContract.CommonDataKinds.Phone via LOOKUP_KEY", it's modified here to get Email using LOOKUP_KEY.

package com.example.androidquerycontacts;

import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.v4.content.CursorLoader;
import android.support.v4.widget.CursorAdapter;
import android.support.v4.widget.SimpleCursorAdapter;
import android.app.Activity;
import android.database.Cursor;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {
 
 ListView listContacts;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  listContacts = (ListView)findViewById(R.id.conactlist);
  
  Uri queryUri = ContactsContract.Contacts.CONTENT_URI;

  //Get All contacts
  CursorLoader cursorLoader = new CursorLoader(
            this, 
            queryUri, 
            null, 
            null, 
            null, 
            null);
  
  Cursor cursor = cursorLoader.loadInBackground();
  
  String[] from = {ContactsContract.Contacts.DISPLAY_NAME};
        int[] to = {android.R.id.text1};
        
        ListAdapter adapter = new SimpleCursorAdapter(
                this, 
                android.R.layout.simple_list_item_1, 
                cursor, 
                from, 
                to, 
                CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
        listContacts.setAdapter(adapter);
        
        listContacts.setOnItemClickListener(myOnItemClickListener);
 }
 
 OnItemClickListener myOnItemClickListener
 = new OnItemClickListener(){

  @Override
  public void onItemClick(AdapterView<?> parent, View view, int position,
    long id) {
   Cursor cursor = (Cursor)parent.getItemAtPosition(position);
   String item_LookUp = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
   
   Uri lookUpUri = ContactsContract.CommonDataKinds.Email.CONTENT_URI;
   
   String[] projection = new String[] {
     ContactsContract.CommonDataKinds.Email.DATA};
   
   String selection = ContactsContract.CommonDataKinds.Email.LOOKUP_KEY + "=?";
   String[] selectionArgs = new String[]{item_LookUp};
   
   CursorLoader cursorLoader_LookUp = new CursorLoader(
     MainActivity.this, 
     lookUpUri, 
     projection, 
     selection, 
     selectionArgs, 
     null);
   Cursor cursor_LookUp = cursorLoader_LookUp.loadInBackground();

   int lookUpCol_Data = cursor_LookUp.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA);

   String stringEmail = item_LookUp + "\n";
   while(cursor_LookUp.moveToNext()){

    String stringData = cursor_LookUp.getString(lookUpCol_Data);
    stringEmail += stringData + "\n";
   }
   
   Toast.makeText(getApplicationContext(), 
     stringEmail, 
     Toast.LENGTH_LONG).show();

  }
  
 };

}

Download the files.