??上篇文章中，我們介紹了如何從csv和vcf格式的文件中獲取聯系人信息。鏈接：http://blog.csdn.net/github_36878269/article/details/76696685
這次我們反著來，將聯系人信息導出為這兩種格式的文件。上篇文章中我們已經介紹了這兩種格式文件，不再贅述。直接貼代碼。
??1.導出為vcf格式。

try{ public static void exportAsVCF(List<EntityContact> contacts){try{//導出到指定文件夾。String path = Environment.getExternalStorageDirectory() + "/test/VCFContacts.vcf"; OutputStreamWriter writer = new OutputStreamWriter(new FileOutputStream(path), "UTF-8");//將數據寫入到文件中。for(EntityContact contact : contacts){writer.write("BEGIN:VCARD\r\n");writer.write("VERSION:3.0\r\n");if(contact.getName() != null){writer.write("N:;" + contact.getName() + ";;;\r\n");}if(contact.getMobile_num() != null){writer.write("TEL;CELL:" + contact.getMobile_num() + "\r\n");}if(contact.getOffice_num() != null){writer.write("TEL;WORK;VOICE:" + contact.getOffice_num() + "\r\n");}if(contact.getHome_num() != null){writer.write("TEL;HOME;VOICE:" + contact.getHome_num() + "\r\n");}if(contact.getEmail() != null){writer.write("EMAIL;HOME:" + contact.getEmail() + "\r\n");}if(contact.getHome_address() != null){writer.write("ADR;HOME:" + contact.getHome_address() + ";;;;;;\r\n");}if(contact.getOffice_address() != null){writer.write("ADR;WORK:" + contact.getOffice_address() + ";;;;;;\r\n");}if(contact.getExtend() != null){writer.write("NOTE;WORK:" + contact.getExtend() + "\r\n");}//獲取圖片信息。String photo = contact.getPhoto();if(photo != null){byte [] photoByte = Base64.decode(photo, Base64.NO_WRAP);String photoType = null;if (photoByte.length >= 3 && photoByte[0] == 'G' && photoByte[1] == 'I' && photoByte[2] == 'F') {photoType = "GIF";} else if (photoByte.length >= 4 && photoByte[0] == (byte) 0x89&& photoByte[1] == 'P' && photoByte[2] == 'N' && photoByte[3] == 'G') {photoType = "PNG";} else if (photoByte.length >= 2 && photoByte[0] == (byte) 0xff&& photoByte[1] == (byte) 0xd8) {photoType = "JPEG";} else {photoType = "unknow";}writer.write("PHOTO;ENCODING=B;TYPE=" + photoType + ":" + photo + "\r\n");}writer.write("END:VCARD");if(contacts.indexOf(contact) != (contacts.size() - 1)){writer.write("\r\n");}}writer.flush();writer.close();} catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }

上述代碼完成了獲取鏈表中的聯系人信息，并逐條的寫入到內部存儲的/test/contactsVCF.vcf文件里。其中EntityContact為自定義的實體類，我只獲取了我感興趣的數據，其中的成員變量都在代碼中引用了，就不貼該實體類的代碼了。

??2.csv格式的導出。
根據上篇文章所述，我們根據該格式來講聯系人導出，下面是具體代碼：

/*** 將數據導出為CSV格式的。* @param contacts*/ public static void exportAsCSV(List<EntityContact> contacts){String csvPath = Environment.getExternalStorageDirectory() + "/test/CSVContacts.csv";OutputStreamWriter csvwriter;try {csvwriter = new OutputStreamWriter(new FileOutputStream(csvPath), "UTF-8");//添加三個字節，使文件為帶bom的utf8格式的文件。csvwriter.write(new String(new byte[]{(byte)0xEF, (byte)0xBB, (byte)0xBF}));csvwriter.write("Family Name,Given Name,Additional Name,Prefix Name,Suffix Name," + "Mobile Number,Home Number,Office Number,Home Fax,Bussiness Fax,Pager,Other,customize," + "Home Email,Work Email,Other Email,customize,Address Home,Address Work,Address Other,"+ "customize,Organization Work,Organization Other,customize,AIM,Windows Live,YAHOO," + "SKYPE-USERNAME,OICQ,GOOGLE-TALK,JABBER,Notes,NickName,WebPage,Ptt/DC1,Ptt/DC2"); for(EntityContact contact : contacts){csvwriter.write("\r\n\"\",");if(contact.getName() != null){csvwriter.write("\"" + contact.getName() + "\",");} else {csvwriter.write("\"\",");}csvwriter.write("\"\",\"\",\"\",");if(contact.getMobile_num() != null){csvwriter.write("\"" + contact.getMobile_num() + "\",");} else{csvwriter.write("\"\",");}if(contact.getHome_num() != null){csvwriter.write("\"" + contact.getHome_num() + "\",");} else{csvwriter.write("\"\",");}if(contact.getOffice_num() != null){csvwriter.write("\"" + contact.getOffice_num() + "\",");} else{csvwriter.write("\"\",");}csvwriter.write("\"\",\"\",\"\",\"\",\"\",");if(contact.getEmail() != null){csvwriter.write("\"" + contact.getEmail() + "\",");} else{csvwriter.write("\"\",");}csvwriter.write("\"\",\"\",\"\",");if(contact.getHome_address() != null){csvwriter.write("\"" + contact.getHome_address() + "\",");} else{csvwriter.write("\"\",");}if(contact.getOffice_address() != null){csvwriter.write("\"" + contact.getOffice_address() + "\",");} else{csvwriter.write("\"\",");}csvwriter.write("\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",\"\",");if(contact.getExtend() != null){csvwriter.write("\"" + contact.getExtend() + "\",");} else{csvwriter.write("\"\",");}csvwriter.write("\"\",\"\",\"\",\"\"");}csvwriter.flush();csvwriter.close();} catch (IOException e) {e.printStackTrace();} }

??需要說明的是在11行添加的三個byte，為什么要這么做？因為如果不添加這三個byte，也就是默認導出，導出的文件格式為UTF-8無BOM格式，該格式再windows上無法用華為手機助手解析該文件，所以要加上這三個byte，來實現從電腦導入聯系人的功能。

好的，關于聯系人信息的導出我們就介紹到這了，有不足的地方，還望大家能指出來。

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