安卓手机联系人有唯一的标识符吗

Question

我有一个应用程序，可以读取手机的联系方式。当通过Email.ContentUri.访问时，此代码返回744作为特定联系人行的id

var uriEmail = ContactsContract.CommonDataKinds.Email.ContentUri;
string[] projectionEmail = { ContactsContract.Contacts.InterfaceConsts.Id, ContactsContract.Contacts.InterfaceConsts.DisplayName, ContactsContract.Contacts.InterfaceConsts.PhotoUri, ContactsContract.CommonDataKinds.Email.Address };
var cursorEmail = this.Activity.ContentResolver.Query(uriEmail, projectionEmail, null, null, null);
// var contactList = new List<string>();
contacts = new ObservableCollection<Contact>();
if (cursorEmail.MoveToFirst())
{
do
{
//contactList.Add(cursor.GetString(cursor.GetColumnIndex(projection[2])));
contacts.Add(new Contact()
{
Id = cursorEmail.GetInt(cursorEmail.GetColumnIndex(projectionEmail[0])),
Name = cursorEmail.GetString(cursorEmail.GetColumnIndex(projectionEmail[1])),
Photo = cursorEmail.GetString(cursorEmail.GetColumnIndex(projectionEmail[2])),
Email = cursorEmail.GetString(cursorEmail.GetColumnIndex(projectionEmail[3])),
});
}
while (cursorEmail.MoveToNext());
}
ListView listEmail = v.FindViewById<ListView>(Resource.Id.listViewSelect);
listEmail.Adapter = new ContactAdapter(v.Context, contacts);
listEmail.ItemClick += OnClientListClick;

当通过StructuredPostal.ContentUri.访问时，此代码返回752作为同一联系人的id

var uriAddress = ContactsContract.CommonDataKinds.StructuredPostal.ContentUri;
string[] projectionAddress = { ContactsContract.Contacts.InterfaceConsts.Id, ContactsContract.Contacts.InterfaceConsts.DisplayName, ContactsContract.Contacts.InterfaceConsts.PhotoUri, ContactsContract.CommonDataKinds.StructuredPostal.Street, ContactsContract.CommonDataKinds.StructuredPostal.Postcode };
var cursorAddress = this.Activity.ContentResolver.Query(uriAddress, projectionAddress, null, null, null);
// var contactList = new List<string>();
properties = new ObservableCollection<Property>();
if (cursorAddress.MoveToFirst())
{
do
{
int n = cursorAddress.GetInt(cursorAddress.GetColumnIndex(projectionAddress[0]));
string str = cursorAddress.GetString(cursorAddress.GetColumnIndex(projectionAddress[1]));
if (n == nId)
{
//contactList.Add(cursor.GetString(cursor.GetColumnIndex(projection[2])));
properties.Add(new Property()
{
Id = cursorAddress.GetInt(cursorAddress.GetColumnIndex(projectionAddress[0])),
Name = cursorAddress.GetString(cursorAddress.GetColumnIndex(projectionAddress[1])),
Photo = cursorAddress.GetString(cursorAddress.GetColumnIndex(projectionAddress[2])),
Street = cursorAddress.GetString(cursorAddress.GetColumnIndex(projectionAddress[3])),
Postcode = cursorAddress.GetString(cursorAddress.GetColumnIndex(projectionAddress[4])),
});
}
}
while (cursorAddress.MoveToNext());
}
ListView listAddress = v.FindViewById<ListView>(Resource.Id.listViewSelect);
listAddress.Adapter = new PropertyAdapter(v.Context, properties);
listAddress.ItemClick += OnPropertyListClick;

安卓手机中是否有分配给联系人的唯一标识符？

Answer 1

如果你想要一个唯一的id，你可以使用CONTACT_id，它是每个联系人_id的引用。

• 联系人ID：https://developer.android.com/reference/android/provider/ContactsContract.RawContactsColumns.html#CONTACT_ID

• _ID：https://developer.android.com/reference/android/provider/BaseColumns#_ID

如果您想使用唯一的id交叉设备，可以尝试使用LOOKUP_KEY。

• LOOKUP_KEY：https://developer.android.google.cn/reference/android/provider/ContactsContract.ContactsColumns.html#LOOKUP_KEY

有关更多代码详细信息，您可以查看下面的链接。获取Android手机联系人的跨设备唯一ID