Android: How to save contacts to sdcard as vCard. Without duplicates?

天涯浪子 提交于 2019-12-01 21:05:12
Dipak Keshariya

Use below code for Save contact data as a vcf file into device sdcard.

public class VCardActivity extends Activity {
    Cursor cursor;
    ArrayList<String> vCard;
    String vfile;
    static Context mContext;

    /** Called when the activity is first created. */
    @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            mContext = VCardActivity.this;
            getVCF();
        }

        public static void getVCF() {
            final String vfile = "Contacts.vcf";
            Cursor phones = mContext.getContentResolver().query(
            ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
            phones.moveToFirst();
            for (int i = 0; i < phones.getCount(); i++) {
                String lookupKey = phones.getString(phones.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
                Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);
                AssetFileDescriptor fd;
                try {
                    fd = mContext.getContentResolver().openAssetFileDescriptor(uri, "r");
                    FileInputStream fis = fd.createInputStream();
                    byte[] buf = new byte[(int) fd.getDeclaredLength()];
                    fis.read(buf);
                    String VCard = new String(buf);
                    String path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
                    FileOutputStream mFileOutputStream = new FileOutputStream(path, true);
                    mFileOutputStream.write(VCard.toString().getBytes());
                    phones.moveToNext();
                    Log.d("Vcard", VCard);
                } catch (Exception e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            }
        }
    }

and see below link for more information.

Export Contacts as a VCF file

and give below permission into your androidmanifest.xml file.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Check duplicity for lookupKey...

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