LOOKUP_KEY和CONTENT_LOOKUP_URI

Question

我有以下代码来获取联系人的详细信息。"data"：选择联系人后返回的Uri。

我需要确保我会在将来找到正确的联系人，所以我应该保存哪些内容以备将来使用？是"lookupUri“还是"lookupKey"？

    Cursor c =  activity.managedQuery(data, null, null, null, null);
    c.moveToFirst();
    String lookupKey = c.getString(c.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY ));
    c.close();

    // Next use that key to access the details of the contact in order to get the name and the photo
    // Also, save it for future use.
    // It will be used when we fetch the details from the database since the photo itself is not saved.
     Uri lookupUri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_LOOKUP_URI,lookupKey);

    Uri uri = ContactsContract.Contacts.lookupContact(activity.getContentResolver(), deviceDetails.lookupUri);

Answer 1

LookupKey是您想要存储的唯一标识符。

仅供参考；2.1中存在一个错误，当名称更改时，未同步的联系人LookupKey会发生更改。

Answer 2

这是可行的。我的示例查找名称；在投影中添加或删除您想要的字段。

private String getContactNameFromAndroidKey (String key)
{
  // Run query
  Uri uri = Uri.parse (ContactsContract.Contacts.CONTENT_LOOKUP_URI + "/" + key);

  String[] projection = new String[] {
    Contacts._ID,
    Contacts.DISPLAY_NAME,
  };

  Cursor cursor = context.getContentResolver().query (
    uri,
    projection,
    null,
    null,
    null);

  if (!cursor.moveToNext()) // move to first (and only) row.
    throw new IllegalStateException ("contact no longer exists for key");
  String name = cursor.getString(1);
  cursor.close();

  return name;
}