在android listvew中获取联系人姓名和生日

我正在尝试获取一个包含所有联系人姓名和birtday的列表视图：

在我的oncreate（）中：

My GetContactsBithDays（）方法：

但我有一个非法参数例外：列'\u id'不存在 当我创建适配器时

有人能解释一下原因吗？

来自（扩展）：

游标必须包含名为“\u id”的列，否则此类将无法工作

从（扩展到）：

游标必须包含名为“\u id”的列，否则此类将无法工作

---

我最终为此更改了代码：

private Cursor getContactsBirthdays() {
    try {
        Uri uri = ContactsContract.Data.CONTENT_URI;

        String[] projection = new String[] {
                ContactsContract.Contacts.DISPLAY_NAME,
                ContactsContract.Contacts._ID,
                ContactsContract.CommonDataKinds.Event.START_DATE
        };
        String where =
                ContactsContract.Data.MIMETYPE + "= ? AND " +
                ContactsContract.CommonDataKinds.Event.TYPE + "=" + 
                ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY;
        String[] selectionArgs = new String[] { 
            ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE
        };
        String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";
        return managedQuery(uri, projection, where, selectionArgs, sortOrder);
    } catch (Exception e) {
        Log.e("Contact Error", "Error: " + e.getMessage());
        return null;
    }
}

---

我最终为此更改了代码：

private Cursor getContactsBirthdays() {
    try {
        Uri uri = ContactsContract.Data.CONTENT_URI;

        String[] projection = new String[] {
                ContactsContract.Contacts.DISPLAY_NAME,
                ContactsContract.Contacts._ID,
                ContactsContract.CommonDataKinds.Event.START_DATE
        };
        String where =
                ContactsContract.Data.MIMETYPE + "= ? AND " +
                ContactsContract.CommonDataKinds.Event.TYPE + "=" + 
                ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY;
        String[] selectionArgs = new String[] { 
            ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE
        };
        String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";
        return managedQuery(uri, projection, where, selectionArgs, sortOrder);
    } catch (Exception e) {
        Log.e("Contact Error", "Error: " + e.getMessage());
        return null;
    }
}

private Cursor getContactsBirthdays() {
    try {
        Uri uri = ContactsContract.Data.CONTENT_URI;

        String[] projection = new String[] {
                ContactsContract.Contacts.DISPLAY_NAME,
                ContactsContract.Contacts._ID,
                ContactsContract.CommonDataKinds.Event.START_DATE
        };
        String where =
                ContactsContract.Data.MIMETYPE + "= ? AND " +
                ContactsContract.CommonDataKinds.Event.TYPE + "=" + 
                ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY;
        String[] selectionArgs = new String[] { 
            ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE
        };
        String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";
        return managedQuery(uri, projection, where, selectionArgs, sortOrder);
    } catch (Exception e) {
        Log.e("Contact Error", "Error: " + e.getMessage());
        return null;
    }
}