Android联系人在单个数据库查询中显示姓名和电话号码？

Question

我正在尝试从 native 数据库中获取联系人列表以及他们的显示名称和电话号码(任何或全部)。有许多方法可以通过对手机数据库的多次查询来获取此信息，但这会带来相当大的开销。

这是我一直在处理的查询，但结果是

Uri uri                = ContactsContract.Contacts.CONTENT_URI;
String[] projection    = new String[] { ContactsContract.Contacts._ID,
                                        ContactsContract.Contacts.DISPLAY_NAME,
                                        ContactsContract.CommonDataKinds.Phone.NUMBER};
String selection       = ContactsContract.Contacts.HAS_PHONE_NUMBER + " = '1'";
String[] selectionArgs = null;
String sortOrder       = ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";

Cursor people          = getContentResolver().query(uri, projection, selection, selectionArgs, sortOrder);

int index_id    = people.getColumnIndex(ContactsContract.Contacts._ID);
int indexName   = people.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME);
int indexNumber = people.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);

people.moveToFirst();
do {
    String _id    = people.getString(index_id);
    String name   = people.getString(indexName);
    String number = people.getString(indexNumber);
    // Do work...
} while (people.moveToNext());

这是由此产生的错误。

E/AndroidRuntime(21549): Caused by: java.lang.IllegalArgumentException: Invalid column data1
E/AndroidRuntime(21549):    at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:144)
E/AndroidRuntime(21549):    at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:114)
E/AndroidRuntime(21549):    at android.content.ContentProviderProxy.bulkQueryInternal(ContentProviderNative.java:372)
E/AndroidRuntime(21549):    at android.content.ContentProviderProxy.query(ContentProviderNative.java:408)
E/AndroidRuntime(21549):    at android.content.ContentResolver.query(ContentResolver.java:264)

想法？我相信可能需要连接才能在单个查询中获取所有列。

Answer 1

试试这个代码:

Uri uri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
String[] projection    = new String[] {ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME,
                ContactsContract.CommonDataKinds.Phone.NUMBER};

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

int indexName = people.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
int indexNumber = people.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);

if(people.moveToFirst()) {
    do {
        String name   = people.getString(indexName);
        String number = people.getString(indexNumber);
        // Do work...
    } while (people.moveToNext());
}