Android 解析XML文件和生成XML文件

解析XML文件

public static void initXML(Context context) {
        //can't create in /data/media/0 because permission 
        //can create in /sdcard/hotel
        File mSettings = new File(HOTEL_PATH_XML);
        if (!mSettings.exists()) {
            mSettings.mkdirs();
        }
        File settings = new File(mSettings,"settings.xml");
        Log.i("XmlPullParser-----settings", settings+"+1+");
        if (!settings.exists()) {
            try {
                Log.i("XmlPullParser-----settings", settings+"+2+");
                settings.createNewFile();
                initSettings(settings);
            } catch (IOException e) {
                e.printStackTrace();
                return;
            }
            return;
        }
        
        try {
            XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
            factory.setNamespaceAware(true);
            XmlPullParser xpp = factory.newPullParser();
            xpp.setInput(new FileInputStream(settings), "utf-8");
            int eventType = xpp.getEventType();
            while (eventType != XmlPullParser.END_DOCUMENT) {
                Log.i("XmlPullParser-----TAG", eventType+"");
                if (eventType == XmlPullParser.START_TAG) {
                    String tag = xpp.getName();
                    Log.i("XmlPullParser-----TAG", "tag---------"+tag+"");
                    if (tag.equals("item")) {
                        String id = xpp.getAttributeValue(null, "id");
                        String value = xpp.getAttributeValue(null, "value");
                        if (id.equals("server")) {
                            sServerAddr = value;
                        } else if (id.equals("hotel")) {
                            sHid = value;
                        } else if (id.equals("room")) {
                            sRoomNum = value;
                        }
                    }
                }
                eventType = xpp.next();
            }
            Log.i("XmlPullParser-----TAG", eventType+"exist the xunhuan");
        } catch (XmlPullParserException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

生成XML文件

//默认是没有换行的
public static void initSettings(final File settings) {
        new Thread(new Runnable() {
            
            @Override
            public void run() {
                FileOutputStream fos = null;
                try {
                    fos = new FileOutputStream(settings);
                    XmlSerializer serializer = Xml.newSerializer();
                    serializer.setOutput(fos, "UTF-8");
                    serializer.startDocument("UTF-8", true);
                    serializer.startTag(null, "config");
                    serializer.startTag(null, "category");
                    serializer.attribute(null, "name", "hot");
                    // server
                    serializer.startTag(null, "item");
                    serializer.attribute(null, "id", "server");
                    serializer.attribute(null, "value", "");
                    serializer.endTag(null, "item");
                    // hid
                    serializer.startTag(null, "item");
                    serializer.attribute(null, "id", "hotel");
                    serializer.attribute(null, "value", "");
                    serializer.endTag(null, "item");
                    // room
                    serializer.startTag(null, "item");
                    serializer.attribute(null, "id", "room");
                    serializer.attribute(null, "value", "");
                    serializer.endTag(null, "item");
                    
                    serializer.endTag(null, "category");
                    serializer.endTag(null, "config");
                    serializer.endDocument();
                    serializer.flush();
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (IllegalStateException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } finally {
                    if (fos != null) {
                        try {
                            fos.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }).start();
    }

 XmlPullParser 的使用

生成xml文件的时候如果要出现“<”括号，可以使用脚本把被转成&lt;的<,替换回<  （不要直接使用路径，通过方法获取路径）

sed -i 's/&lt;/</g' /storage/external_storage/sda1/123456.xml

前提是sed命令要在这个Android系统中有效