Android como enviar vários contatos são anexados em um único arquivo. Vcf e enviar para o correio?

Na minha aplicação, vários contatos são anexados a um único.vcf arquivo e esse arquivo enviado para o correio, tente este todos os dados de contatos exibidos no log cat, mas incapaz de enviar todos os dados anexados ao único arquivo .vcf?

Alguém tem uma idéia sobre isso, me ajude, por favor.

aqui está meu código

 public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);  

    vCard = new ArrayList<String>();                 

    Log.i("TAG one", "vfile" +vfile);
    vfile = "Contacts" + "_" + System.currentTimeMillis() + ".vcf";  

    /**
     * This Function For Vcard And here i take one Array List in Which i
     * store every Vcard String of Every Contact Here i take one Cursor and
     * this cursor is not null and its count>0 than i repeat one loop up to
     * cursor.getcount() means Up to number of phone contacts. And in Every
     * Loop i can make vcard string and store in Array list which i declared
     * as a Global. And in Every Loop i move cursor next and print log in
     * logcat.
     * */
    getVcardString();           
}       

private void getVcardString() { 

    cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
    Log.i("TAG two", "cursor" +cursor);
    if (cursor != null && cursor.getCount() > 0) {
        cursor.moveToFirst();
        Log.i("Number of contacts", "cursorCount" +cursor.getCount());          

        for (int i = 0; i < cursor.getCount(); i++) {                       
            get(cursor);                    
            Log.i("TAG send contacts",  "Contact " + (i + 1) + "VcF String is" +  vCard.get(i));                     
            cursor.moveToNext();                                        
        }           

        StringBuffer s = new StringBuffer();
        s.append( vCard.toString());                
        string = s.toString();                           
        file = new File(string);        

    //  Log.i("s", ""+s);   
    //  Log.i("string", ""+string); 
        Log.i("file", ""+file);             

    } else {
        Log.i("TAG", "No Contacts in Your Phone");
    }        
}       

public void get(Cursor cursor) {

    String lookupKey = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
    Log.i("lookupKey", ""+lookupKey);
    Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_VCARD_URI, lookupKey);     

    try {
        AssetFileDescriptor fd = this.getContentResolver().openAssetFileDescriptor(uri, "r");          

        FileInputStream fis = fd.createInputStream();
        byte[] buf = new byte[(int) fd.getDeclaredLength()];
        fis.read(buf);
        String vcardstring= new String(buf);          

        String storage_path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
        FileOutputStream mFileOutputStream = new FileOutputStream(storage_path, true);
        mFileOutputStream.write(vcardstring.toString().getBytes());

        vCard.add(storage_path);            

    } catch (Exception e1)  {            
        e1.printStackTrace();
    }
}       

private void data() {       

    File filelocation = file;     
    Intent sharingIntent = new Intent(Intent.ACTION_SEND);
    sharingIntent.setType("vnd.android.cursor.dir/email");      
    sharingIntent.setType("application/x-vcard");             
    sharingIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://"+filelocation));
    startActivity(Intent.createChooser(sharingIntent, "Send email"));            
}
}