如何使用Android原生API以Vcard格式获取Android联系人

Question

我正在尝试使用Android Api阅读VCard格式的Android设备联系人.我找到了一个相同的链接: Android contatcs vcard API

并尝试编写相同的代码,但它无法正常工作,因为我无法获取lookupkey:

ContentResolver cr = getContentResolver();
Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,
                null, null, null, null);  
int num = cur.getCount();  // I get 2 , as there are two contacts

String lookupKey = cur.getString(cur.getColumnIndex(Contacts.LOOKUP_KEY));
// The above line gives error : android.database.CursorIndexOutOfBoundsException:
//  Index -1 requested, with a size of 2

Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
AssetFileDescriptor fd = resolver.openAssetFileDescriptor(uri, "r");
FileInputStream fis = fd.createInputStream();
    byte[] b = new byte[(int)fd.getDeclaredLength()];
fis.read(b);
String vCard = new String(b);
sb.append(vCard);

任何人都可以告诉我如何获取上述代码的lookupkey或有任何其他方式我们可以使用Android api获取联系人VCard格式.

Answer 1

这个给你:

Cursor cursor = context.getContentResolver().query(
                ContactsContract.Contacts.CONTENT_URI, null, null, null, null);

if (cursor != null && cursor.moveToFirst()) {
    try {
        do {
            String lookupKey = cursor.getString(cursor
                    .getColumnIndex(Contacts.LOOKUP_KEY));


            Uri uri = Uri.withAppendedPath(
                    ContactsContract.Contacts.CONTENT_VCARD_URI,
                    lookupKey);
            AssetFileDescriptor fd;
            try {
                fd = context.getContentResolver()
                        .openAssetFileDescriptor(uri, "r");
                FileInputStream fis = fd.createInputStream();
                byte[] b = new byte[(int) fd.getDeclaredLength()];
                fis.read(b);
                String vCard = new String(b);
                Log.i(TAG, vCard);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        } while (cursor.moveToNext());
    } finally {
        cursor.close();
    }
}