ContactUtils.java 

package com.chen.utils;    import java.util.ArrayList;  import java.util.HashMap;  import java.util.List;  import java.util.Map;    import android.content.ContentResolver;  import android.content.ContentUris;  import android.content.ContentValues;  import android.database.Cursor;  import android.net.Uri;    /**   * 联系人操作工具类,提供姓名,手机,邮箱的增删改查操作   * 如果某一项数据 例如,同一联系人存在多条手机号 , 此类此类只能显示和操作其中的第一条数据   * 其中操作格式为id,name,phone,email;   *    * @author chenj_000   *    */  public class ContactUtils {   /**    * raw_contacts表    */   public static Uri RAW_CONTACTS = Uri     .parse("content://com.android.contacts/raw_contacts");   /**    * data表    */   public static Uri DATA = Uri.parse("content://com.android.contacts/data");   public static final int TYPE_PHONE = 5, TYPE_NAME = 7, TYPE_EMAIL = 1;   public static final String[] MIMETYPE = { "",     "vnd.android.cursor.item/email_v2", "vnd.android.cursor.item/im",     "vnd.android.cursor.item/nickname",     "vnd.android.cursor.item/organization",     "vnd.android.cursor.item/phone_v2",     "vnd.android.cursor.item/sip_address",     "vnd.android.cursor.item/name",     "vnd.android.cursor.item/postal-address_v2",     "vnd.android.cursor.item/identity",     "vnd.android.cursor.item/photo",     "vnd.android.cursor.item/group_membership" };   private static final String CONDITION = "raw_contact_id=? and mimetype_id=?";     /**    * 查询所有联系人信息    *     * @return 以list形式返回存放联系人信息的map集合,其中包括的键有id,name,phone,email    */   public static List<Map<String, String>> query(ContentResolver resolver) {    List<Map<String, String>> datas = new ArrayList<Map<String, String>>();    Cursor cursor = resolver.query(RAW_CONTACTS, null, null, null, null);    HashMap<String, String> map;    while (cursor.moveToNext()) {     map = new HashMap<String, String>();     map.put("id", getString(cursor, "_id"));     map.put("name", getString(cursor, "display_name"));     map.put("phone",       getString(getCursor(map.get("id"), TYPE_PHONE, resolver),         "data1"));     map.put("email",       getString(getCursor(map.get("id"), TYPE_EMAIL, resolver),         "data1"));     datas.add(map);    }    return datas;   }     /**    * 从当前Cursor中找出列名为columnName的字段    *     * @param c    *            数据源    * @param columnName    *            列名    * @return 列中的数据,数据源为空时返回结果为null    */   private static String getString(Cursor c, String columnName) {    if (c == null) {     return null;    }    return c.getString(c.getColumnIndex(columnName));   }     /**    * 删除联系人    *     * @param resolver    * @param id    * @return 删除是否成功    */   public static boolean delete(ContentResolver resolver, String id) {    if (resolver.delete(RAW_CONTACTS, "_id=" + id, null) > 0) {     return true;    }    return false;   }     /**    * 更新联系人信息,联系人不存在时返回null    *     * @param resolver    * @param id    *            raw_contact_id    * @param name    * @param phone    * @param email    */   public static boolean update(ContentResolver resolver, String id,     String name, String phone, String email) {    ContentValues values = new ContentValues();      // 更新raw_contact表中的姓名    values = new ContentValues();    values.put("display_name", name);    if (resolver.update(RAW_CONTACTS, values, "_id=" + id, null) == 0)     // 当前不存在此数据     return false;      /*     * 更新data表中的姓名     */    resolver.update(DATA, getDataValues(name, name), CONDITION,      new String[] { id, "" + TYPE_NAME });      /*     * 更新data表手机号码     */    if (resolver.update(DATA, getDataValues(phone, "2"), CONDITION,      new String[] { id, "" + TYPE_PHONE }) == 0) {     // 当前联系人号码为空,插入号码     resolver.insert(DATA,       getDataValues(id, MIMETYPE[TYPE_PHONE], phone));    }      /*     * 更新data表邮箱     */    if (resolver.update(DATA, getDataValues(email, "1"), CONDITION,      new String[] { id, "" + TYPE_EMAIL }) == 0) {     // 当前邮箱不存在,插入邮箱     resolver.insert(DATA,       getDataValues(id, MIMETYPE[TYPE_EMAIL], email));    }    return true;   }     /**    * 用于更新数据时包装数据对象    *     * @param data1    * @param data2    * @return    */   private static ContentValues getDataValues(String data1, String data2) {    ContentValues values = new ContentValues();    values.put("data1", data1);    values.put("data2", data2);    return values;   }     /**    * 插入联系人信息    *     * @param resolver    * @param name    * @param phone    * @param email    */   public static void insert(ContentResolver resolver, String name,     String phone, String email) {    // 向raw_contact表中插入一条空数据,并获得一个id    String id = ""      + ContentUris.parseId(resolver.insert(RAW_CONTACTS,        new ContentValues()));      // 向data表插入邮箱    resolver.insert(DATA, getDataValues(id, MIMETYPE[TYPE_EMAIL], email));    // 向data表插入手机号码    resolver.insert(DATA, getDataValues(id, MIMETYPE[TYPE_PHONE], phone));    // 向data表插入姓名    resolver.insert(DATA, getDataValues(id, MIMETYPE[TYPE_NAME], name));   }     /**    * 将数据包装为ContentValues对象    *     * @param id    *            raw_contact_id    * @param mimetype    * @param data1    * @return    */   private static ContentValues getDataValues(String id, String mimetype,     String data1) {    ContentValues values = new ContentValues();    values.put("raw_contact_id", id);    values.put("mimetype", mimetype);    values.put("data1", data1);    return values;   }     /**    * 在data表中查询符合raw_contact_id,mimetype_id的第一条数据,数据不存在时返回null    *     * @param raw_contact_id    * @param mimetype_id    * @return    */   private static Cursor getCursor(String raw_contact_id, int mimetype_id,     ContentResolver resolver) {    Cursor c = resolver.query(DATA, null, CONDITION, new String[] {      raw_contact_id, "" + mimetype_id }, null);    if (c.moveToNext())     return c;    return null;     }  }