无法读取vCard数据：从ez vcard导出

我正在使用ezvcard库从我自己的应用程序中导出联系人数据。我的问题是，导出的vcard无法在我的股票联系人应用中读取。这是输出：

BEGIN:VCARD 
VERSION:4.0 
N:;User Name;;; 
FN:User Name 
ORG:Anderson Secondary School 
TEL;TYPE=work,voice:92365313 
PRODID:ez-vcard 0.9.9 
END:VCARD 
BEGIN:VCARD 
VERSION:4.0 
N:;All fields 2;;; 
FN:All fields 2 
ORG:List (All fields) 
TEL;TYPE=work,voice:12345678 
PRODID:ez-vcard 0.9.9 
END:VCARD

在下面，我创建电子名片的代码

  LayoutInflater li = SettingsPortationActivity.this.getLayoutInflater();
                    View promptsView = li.inflate(R.layout.prompts, null);
                    fileName = "";
                    fileNameInput = (EditText) promptsView.findViewById(R.id.editTextDialogUserInput);
                    fileNameInput.setText(".vcf");

                    AlertDialog.Builder builder = new AlertDialog.Builder(SettingsPortationActivity.this);
                    // sets prompts to alertdialog builder
                    builder.setView(promptsView);

                    builder.setCancelable(false)
                            .setPositiveButton("Save", new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                    fileName = fileNameInput.getText().toString();
                                    if (!fileName.trim().isEmpty()) { // has value
                                        FavoritesDatabaseHelper db = new FavoritesDatabaseHelper(getApplicationContext());
                                        List<FavoriteObject> favorites = db.getAllFavorites();

                                        List<VCard> vcards = new ArrayList<VCard>();

                                        String storage_path = Environment.getExternalStorageDirectory().toString() + File.separator + fileName;
                                        File file = new File(storage_path);
                                        Log.d("Directory", String.valueOf(storage_path));
                                        VCardWriter writer = null;

                                        try {
                                            writer = new VCardWriter(file, VCardVersion.V4_0);
                                        } catch (IOException e) {
                                            e.printStackTrace();
                                        }

                                        for (int i = 0; i < favorites.size(); i++) {
                                            FavoriteObject fav = favorites.get(i);
                                            Log.d("Export fav", "Fav name" + fav.getContactName());

                                            VCard vcard = new VCard();
                                            vcard.setClassification("PUBLIC");

                                            StructuredName n = new StructuredName();
                                            n.setGiven(fav.getContactName());
                                            vcard.setStructuredName(n);

                                            vcard.setFormattedName(new FormattedName(fav.getContactName()));

                                            Organization org = new Organization();
                                            org.addValue(fav.getListName());
                                            vcard.setOrganization(org);

                                            Telephone tel = new Telephone(fav.getContactNumber());
                                            tel.addType(TelephoneType.WORK);
                                            tel.addType(TelephoneType.VOICE);
                                            vcard.addTelephoneNumber(tel);

                                            vcards.add(vcard);
                                        }

                                        try {
                                            for (VCard vcard : vcards) {
                                                try {
                                                    writer.write(vcard);
                                                } catch (IOException e) {
                                                    e.printStackTrace();
                                                }
                                            }
                                        } finally {
                                            try {
                                                writer.close();
                                                Log.d("Success", "Export success");
                                                Toast.makeText(SettingsPortationActivity.this, "Export Success", Toast.LENGTH_LONG).show();
                                            } catch (IOException e) {
                                                e.printStackTrace();
                                            }
                                        }
                                    } else {
                                        fileNameInput.setError("Please enter a file name");
                                    }
                                }
                            }).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {

                        }
                    });
                    AlertDialog alertDialog = builder.create();
                    alertDialog.show();