读取联系人信息，包括ID、name、number、email、address

/**
 * 此方法从数据库获取联系人信息，包装成对象，放到list集合里
 * @return 包含所有联系人对象的集合
 */
public List<Contact> getContacts() {
List<Contact> contactList = new ArrayList<Contact>();
ContentResolver resolver = context.getContentResolver();
Cursor cursor = context.getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
while (cursor.moveToNext()) {
Contact contact = new Contact();
//联系人id
String contactId = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
contact.setContactId(contactId);
Log.i(TAG, "…contactId…" + contactId);
//联系人姓名
String name = cursor.getString(cursor.getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME));
Log.i(TAG, "…name…" + name);
contact.setName(name);
//判断联系人是否有联系电话
String hasPhone = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER));
if (hasPhone.equalsIgnoreCase("1")) {
hasPhone = "true";
} else {
hasPhone = "false";
}
//查询sortKey，如对应张三的sortKey内容为张zhang三san，可以用来实现排序和按首字母查找
String sortKey = cursor.getString(cursor.getColumnIndex(SORT_KEY));
if (!TextUtils.isEmpty(sortKey)) {
contact.setSortKey(sortKey);
} else {
contact.setSortKey("");
}

//如果有电话，根据联系人的ID查找到联系人的电话，电话可以是多个
if (Boolean.parseBoolean(hasPhone)) {
Cursor phones = context.getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = " + contactId, null, null);
while (phones.moveToNext()) {
String number = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
if (TextUtils.isEmpty(number)) {
contact.setPhoneNum("");
contact.setTelephonNum("");
} else {
if (number.startsWith("1")) {
contact.setPhoneNum(number);
} else if (number.startsWith("0")) {
contact.setTelephonNum(number);
}
}
Log.i(TAG, "…phoneNumber…  " + number);
}
phones.close();
}

//查找email地址，这里email也可以有多个
Cursor emails = context.getContentResolver().query(ContactsContract.CommonDataKinds.Email.CONTENT_URI, null, ContactsContract.CommonDataKinds.Email.CONTACT_ID + " = " + contactId, null, null);
while (emails.moveToNext()) {
String email = emails.getString(emails.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
if (TextUtils.isEmpty(email)) {
contact.setEmail("");
} else {
contact.setEmail(email);
}
Log.i(TAG, "…emailAddress…  " + email);
}
emails.close();

// 获取该联系人地址  
Cursor addrCursor = context.getContentResolver().query(ContactsContract.CommonDataKinds.StructuredPostal.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = " + contactId, null, null);
if (addrCursor.moveToFirst()) {
String address = addrCursor.getString(addrCursor.getColumnIndex(ContactsContract.CommonDataKinds.StructuredPostal.FORMATTED_ADDRESS));
contact.setAddress(address);
}
addrCursor.close();

contactList.add(contact);
}
return contactList;
}

public class Contact {
private String contactId;
private String name;
private String phoneNum;
private String telephonNum;
private String email;
private String address;
private String sortKey;

public String getSortKey() {
return sortKey;
}

public void setSortKey(String sortKey) {
this.sortKey = sortKey;
}

public String getContactId() {
return contactId;
}

public void setContactId(String contactId) {
this.contactId = contactId;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getPhoneNum() {
return phoneNum;
}

public void setPhoneNum(String phoneNum) {
this.phoneNum = phoneNum;
}

public String getTelephonNum() {
return telephonNum;
}

public void setTelephonNum(String telephonNum) {
this.telephonNum = telephonNum;
}

public String getEmail() {
return email;
}

public void setEmail(String email) {
this.email = email;
}

public String getAddress() {
return address;
}

public void setAddress(String address) {
this.address = address;
}
}