Extract contact list in vcf format

Question

How could i run the android method that extract the contact list in a vcf format?
Is there an intent that can directly call this action?

thx François

Answer 1

Here's how to extract to VCF file and share it via an intent, with the option of sharing a single contact if you wish:

    @WorkerThread
    @Nullable
    public static Intent getContactShareIntent(@NonNull Context context, @Nullable String contactId, @NonNull String filePath) {
        final ContentResolver contentResolver = context.getContentResolver();
        Cursor cursor = TextUtils.isEmpty(contactId) ? contentResolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null) :
                contentResolver.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, Data.CONTACT_ID + "=?", new String[]{contactId}, null);
        if (cursor == null || !cursor.moveToFirst())
            return null;
        final File file = new File(filePath);
        file.delete();
        do {
            String lookupKey = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
            Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
            AssetFileDescriptor fd;
            try {
                fd = contentResolver.openAssetFileDescriptor(uri, "r");
                if (fd == null)
                    return null;
                FileInputStream fis = fd.createInputStream();
                IOUtils.copy(fis, new FileOutputStream(filePath, false));
                cursor.moveToNext();
            } catch (Exception e1) {
                e1.printStackTrace();
            }
        } while (cursor.moveToNext());
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
        intent.setType("*/*");
        return intent;
    }