Android как отправить несколько контактов в один.файл vcf и отправить на почту?

Я успешно протестировал следующее. Изменения в коде обозначаются комментариями, начинающимися с "CHANGE:". Не забудьте иметь android.permission.WRITE_EXTERNAL_STORAGE в манифесте.

public class MainActivity extends Activity {
    private String vfile;
    private Cursor cursor;
    private ArrayList<String> vCard;
    private String string;
    private File file;
    private String storage_path; //CHANGE:  storage_path global

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_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();    
        data(); //CHANGE: now calling data to send vCard intent
    }

    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(); CHANGE: not needed
//            s.append( vCard.toString());                
//            string = s.toString();                           
//            file = new File(string); //CHANGE: this is not what file should be        

        } 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);     
            vCard.add(vcardstring); //CHANGE: added this, so log statement in above method doesn't generate error

//            String storage_path = Environment.getExternalStorageDirectory().toString() + File.separator + vfile;
            //CHANGE: this is the path we need to get file for intent:
            storage_path = getExternalFilesDir(null).toString() + File.separator + vfile;            
            Log.i("MainActivity", storage_path);
            //CHANGE: this will create the file we need:
            file = new File(getExternalFilesDir(null), vfile);
            file.createNewFile(); //CHANGE
            //CHANGE: this will create the stream we need:
            FileOutputStream mFileOutputStream = new FileOutputStream(file, true); 
            mFileOutputStream.write(vcardstring.toString().getBytes());
            mFileOutputStream.close(); //don't forget to close

    //            vCard.add(storage_path); //CHANGE: not needed           

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

    private void data() {     
    //        File filelocation = file; //CHANGE: not what we need    
        Intent sharingIntent = new Intent(Intent.ACTION_SEND);
        sharingIntent.setType("vnd.android.cursor.dir/email");      
        sharingIntent.setType("application/x-vcard"); 
        //CHANGE: using correct path:
        sharingIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(storage_path));
        startActivity(Intent.createChooser(sharingIntent, "Send email"));            
    }

}