Android中怎么查询联系人信息

String columns[] = new String[] { People._ID, People.NAME, People.NUMBER, People.PRIMARY_EMAIL_ID,   People.PRIMARY_ORGANIZATION_ID, People.PRIMARY_PHONE_ID, People.DISPLAY_NAME,   People.IM_ACCOUNT, People.IM_HANDLE, People.PHONETIC_NAME, People.TYPE };  Uri mContacts = People.CONTENT_URI;  Cursor cur = managedQuery(mContacts, columns, // 要返回的数据字段  null, // WHERE子句  null, // WHERE 子句的参数  People.NAME // Order-by子句  );  if (cur.moveToFirst()) {  Cursor newcur = null;  do {  // 获取字段的值  String name = cur.getString(cur.getColumnIndex(People.NAME));  String phoneNo = cur.getString(cur.getColumnIndex(People.NUMBER));  String peopleId = cur.getString(cur.getColumnIndex(People._ID));  String[] PROJECTION = new String[] { Contacts.ContactMethods._ID, Contacts.ContactMethods.KIND, Contacts.ContactMethods.DATA };  newcur = managedQuery(Contacts.ContactMethods.CONTENT_URI, PROJECTION, Contacts.ContactMethods.PERSON_ID + "=\'"  + cur.getLong(cur.getColumnIndex(People._ID)) + "\'", null, null);  startManagingCursor(newcur);  String email = "";  if (newcur.moveToFirst()) {  email = newcur.getString(newcur.getColumnIndex(Contacts.ContactMethods.DATA));  }  log.info("name = " + name + " phoneNo = " + phoneNo + "email = " + email);  if (email != null && !"".equals(email) && email.trim().length() != 0) {  //此处可以取到联系人邮件  }  } while (cur.moveToNext());  if (newcur != null) {  newcur.close();//用完得关闭吧  }  }  if (cur != null)  cur.close(); //用完得关闭吧