Android使用pull解析xml格式的数据

dom解析：基于全文加载的解析方式   sax解析：基于事件的逐行解析方式  pull解析：同sax

        



    XmlPullParser


    //解析xml文件读取短信内容

    public static int restoreSms(Context context) {

        ArrayList<SmsBean> arrayList = null;

        SmsBean smsBean = null;

        try{

            //1.通过Xml获取一个XmlPullParser对象

            XmlPullParser xpp = Xml.newPullParser();

            //2.设置XmlPullParser对象的参数，需要解析的是哪个xml文件,设置一个文件读取流

        

            //通过context获取一个资产管理者对象

            AssetManager assets = context.getAssets();

            //通过资产管理者对象能获取一个文件读取流

            InputStream inputStream = assets.open("backupsms.xml");

            xpp.setInput(inputStream,"utf-8");

            //xpp.setInput(context.openFileInput("backupsms2.xml"), "utf-8");

            //3.获取当前xml行的事件类型

            int type = xpp.getEventType();

            //4.判断事件类型是否是文档结束的事件类型

            while(type != XmlPullParser.END_DOCUMENT){

                //5.如果不是，循环遍历解析每一行的数据。解析一行后，获取下一行的事件类型



                String currentTagName = xpp.getName();

                //判断当前行的事件类型是开始标签还是结束标签

                switch (type) {

                case XmlPullParser.START_TAG:

                    if(currentTagName.equals("Smss")){

                        //如果当前标签是Smss，需要初始化一个集合

                        arrayList = new ArrayList<SmsBean>();

                    }else if(currentTagName.equals("Sms")){



                        smsBean = new SmsBean();

                        smsBean.id = Integer.valueOf(xpp.getAttributeValue(null, "id"));



                    }else if(currentTagName.equals("num")){

                        smsBean.num =  xpp.nextText();

                    }else if(currentTagName.equals("msg")){

                        smsBean.msg =  xpp.nextText();

                    }else if(currentTagName.equals("date")){

                        smsBean.date =  xpp.nextText();

                    }

                    break;

                case XmlPullParser.END_TAG:

                    //当前结束标签是Sms的话，一条短信数据封装完成， 可以加入list中

                    if(currentTagName.equals("Sms")){

                        arrayList.add(smsBean);

                    }

                    break;

                default:

                    break;

                }



                type = xpp.next();//获取下一行的事件类型

            }



            return arrayList.size();



        }catch (Exception e) {

            e.printStackTrace();

        }

        return 0;

    }