安卓;我只有 2 个联系人，但查询却可以得到 5 个，为什么？
我在模拟器中设置了 2 个测试触点。
我正在运行以下查询，它应该将它们都挑选出来，填充我的域对象，然后添加到列表中。因此底部的输出应该是2，但是却是5，这是为什么呢？ （cursor.getCount() 是 5 而不是 2）
我已经完成了 while 循环的每次迭代，它多次检索相同的联系人，但 POSTCODE 的值不同，例如电话数字
ContentResolver cr = getContentResolver();
Cursor cursor = cr.query(ContactsContract.Data.CONTENT_URI,
null, null, null, null);
List<MeCercanaContact> contacts = new ArrayList<MeCercanaContact>();
if (cursor.getCount() > 0)
{
while (cursor.moveToNext())
{
MyContact myContact = new MyContact();
String givenName = cursor.getString(cursor.getColumnIndex(
ContactsContract.Contacts.DISPLAY_NAME));
String postcode = cursor.getString(cursor.getColumnIndex(
ContactsContract.CommonDataKinds.StructuredPostal.POSTCODE));
myContact.setFirstName(givenName);
myContact.setLastName(postcode);
contacts.add(myContact);
}
}
System.out.println(contacts.size());
I have setup 2 test contacts in my emulator.
I'm running the following query, it should pick them both out, populate my domain object, and add to a list. The output at the bottom should therefore be 2, but it is 5, why is this? (cursor.getCount() is 5 instead of 2)
I have stepped through each iteration of the while loop and it is retreving the same contact multiple times, but with different values for POSTCODE, such as the phone number
ContentResolver cr = getContentResolver();
Cursor cursor = cr.query(ContactsContract.Data.CONTENT_URI,
null, null, null, null);
List<MeCercanaContact> contacts = new ArrayList<MeCercanaContact>();
if (cursor.getCount() > 0)
{
while (cursor.moveToNext())
{
MyContact myContact = new MyContact();
String givenName = cursor.getString(cursor.getColumnIndex(
ContactsContract.Contacts.DISPLAY_NAME));
String postcode = cursor.getString(cursor.getColumnIndex(
ContactsContract.CommonDataKinds.StructuredPostal.POSTCODE));
myContact.setFirstName(givenName);
myContact.setLastName(postcode);
contacts.add(myContact);
}
}
System.out.println(contacts.size());
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在 API 21 之后，我们编写此查询以删除重复的联系人。
After API 21 We Write this Query for remove contact duplicacy.
您正在查询 ContactsContract.Data，它是一个通用容器，其中包含各种联系人详细信息的列表，例如电话号码、邮政编码等。您必须筛选 ContactsContract.Data.MIMETYPE 列等于 StructuredPostal.CONTENT_ITEM_TYPE 的行的结果：
因此将查询更改为：
参见 ContactsContract.Data
You are querying ContactsContract.Data, which is a generic container that holds a list of various contact details, such as phone numbers, postal codes etc.. You must filter the results for the rows whose ContactsContract.Data.MIMETYPE column equals StructuredPostal.CONTENT_ITEM_TYPE:
So change the query to:
See ContactsContract.Data
注册到多个群组的联系人将多次显示
如果您查询
Uri CONTENT_URI = ContactsContract.Data.CONTENT_URI将其添加到您的选择中：
a contact that is registered to multiple groups will show up multiple times
if you query the
Uri CONTENT_URI = ContactsContract.Data.CONTENT_URIAdd this to your SELECTION: