学步园

　　解析xml文件的的文章很多，但是Android里生成xml文件的文章就很少了。偶然机会找到一篇相关发面的文章，就分享一下了：

　　用到的主要是XmlSerializer，利用它来写xml文件。

private static void XmlFileCreator(List<JokeBean> data){
        File newxmlfile = new File(Environment.getExternalStorageDirectory()+"/new.xml");
try{
if(!newxmlfile.exists())
                newxmlfile.createNewFile();
        }catch(IOException e){
            Log.e("IOException", "exception in createNewFile() method");
        }
//we have to bind the new file with a FileOutputStream
        FileOutputStream fileos = null;        
try{
            fileos = new FileOutputStream(newxmlfile);
        }catch(FileNotFoundException e){
            Log.e("FileNotFoundException", "can't create FileOutputStream");
        }
//we create a XmlSerializer in order to write xml data
        XmlSerializer serializer = Xml.newSerializer();
try {
//we set the FileOutputStream as output for the serializer, using UTF-8 encoding
            serializer.setOutput(fileos, "UTF-8");
//Write <?xml declaration with encoding (if encoding not null) and standalone flag (if standalone not null)
            serializer.startDocument(null, Boolean.valueOf(true));
//set indentation option
            serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true);
//start a tag called "root"
            serializer.startTag(null, "jokes");
for(JokeBean joke:data){
                serializer.startTag(null, "joke");
//i indent code just to have a view similar to xml-tree
                serializer.startTag(null, "id");
                serializer.text(joke.getId());
                serializer.endTag(null, "id");

                serializer.startTag(null, "title");
                serializer.text(joke.getTitle());
//set an attribute called "attribute" with a "value" for <child2>
//serializer.attribute(null, "attribute", "value");
                serializer.endTag(null, "title");
                serializer.startTag(null, "text");
//write some text inside <text>
                serializer.text(joke.getText());
                serializer.endTag(null, "text");

                serializer.endTag(null, "joke");
            }
            serializer.endTag(null, "jokes");
            serializer.endDocument();
//write xml data into the FileOutputStream
            serializer.flush();
//finally we close the file stream
            fileos.close();
        } catch (Exception e) {
            Log.e("Exception","error occurred while creating xml file");
        }
    }

　　实际上还有一种笨方法，只不过我没有试：那就是直奔普通字符文本写入文件就可以解决这个问题。不过这样要稍微麻烦些。

参考文章：

　　http://www.anddev.org/write_a_simple_xml_file_in_the_sd_card_using_xmlserializer-t8350.html