Serialization generation and parsing of XML files in Android

Serialization generation and parsing of XML files in Android

First, I put the object class of Person

package net.loonggg.test;    public class Person {      private int id;      private String age;      private String name;      private String sex;      private String address;        public int getId() {          return id;      }        public void setId(int id) {          this.id = id;      }        public String getAge() {          return age;      }        public void setAge(String age) {          this.age = age;      }        public String getName() {          return name;      }        public void setName(String name) {          this.name = name;      }        public String getSex() {          return sex;      }        public void setSex(String sex) {          this.sex = sex;      }        public String getAddress() {          return address;      }        public void setAddress(String address) {          this.address = address;      }        @Override      public String toString() {          return "Person [id=" + id + ", age=" + age + ", name=" + name                  + ", sex=" + sex + ", address=" + address + "]";      }    }  

Second, the method for generating an xml file is as follows:

/*** Generate xml */private void createXml () {XmlSerializer serializer = Xml. newSerializer (); // xml File generator file File = new File (Environment. getExternalStorageDirectory (), "person. xml "); FileOutputStream fos = null; try {fos = new FileOutputStream (file); serializer. setOutput (fos, "UTF-8"); // set the output stream and character encoding serializer for the xml generator. startDocument ("UTF-8", true); // start document. The parameters are character encoding and whether to maintain independent serializer. startTag (null, "pers Ons "); // start tag. The parameters are namespace and the standard signature for (Person person: list) {serializer. startTag (null, "person"); serializer. attribute (null, "id", person. getId () + ""); serializer. startTag (null, "name"); // start label serializer. text (person. getName (); // serializer of text content. endTag (null, "name"); // end label serializer. startTag (null, "sex"); serializer. text (person. getSex (); serializer. endTag (null, "sex"); serializer. startTag (null, "Age"); serializer. text (person. getAge (); serializer. endTag (null, "age"); serializer. startTag (null, "address"); serializer. text (person. getAddress (); serializer. endTag (null, "address"); serializer. endTag (null, "person");} serializer. endTag (null, "persons"); // end label serializer. endDocument (); // end the xml document Toast. makeText (getApplicationContext (), "generated successfully! ", Toast. LENGTH_SHORT);} catch (Exception e) {Toast. makeText (getApplicationContext ()," generation failed! ", Toast. LENGTH_SHORT); e. printStackTrace () ;}finally {try {fos. close () ;}catch (IOException e) {e. printStackTrace ();}}}

The method for parsing xml files is as follows:

/*** Parse xml file */private List
 
  
PullXml () {try {File file = new File (Environment. getExternalStorageDirectory (), "person. xml"); FileInputStream FCM = new FileInputStream (file); List
  
   
Persons = null; Person person = null; XmlPullParser parser = Xml. newPullParser (); // get the xml parser. setInput (FCM, "UTF-8"); // The parameters are the input stream and the character encoding int type = parser. getEventType (); while (type! = XmlPullParser. END_DOCUMENT) {// if the event is not equal to the end event of the document, the loop switch (type) {case XmlPullParser will continue. START_TAG: if ("persons ". equals (parser. getName () {persons = new ArrayList
   
    
();} Else if ("person ". equals (parser. getName () {person = new Person (); String id = parser. getAttributeValue (0); person. setId (Integer. parseInt (id);} else if ("name ". equals (parser. getName () {person. setName (parser. nextText ();} else if ("sex ". equals (parser. getName () {person. setSex (parser. nextText ();} else if ("address ". equals (parser. getName () {person. setAddress (parser. nextText ();} else if ("age ". equals (parser. getName () {person. setAge (parser. nextText ();} break; case XmlPullParser. END_TAG: if ("person ". equals (parser. getName () {persons. add (person); person = null;} break;} type = parser. next (); // continue the next event} return persons;} catch (NumberFormatException e) {e. printStackTrace ();} catch (FileNotFoundException e) {e. printStackTrace ();} catch (XmlPullParserException e) {e. printStackTrace ();} catch (IOException e) {e. printStackTrace ();} return null ;}
   
  
 

The second is part of the code called in MainActivity:

Public class MainActivity extends Activity {private Button btn_create = null; private Button btn_pull = null; private TextView TV _show; private List
 
  
List = null; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); btn_create = (Button) findViewById (R. id. createXml); btn_pull = (Button) findViewById (R. id. pullXml); TV _show = (TextView) findViewById (R. id. tvShow); list = new ArrayList
  
   
(); For (int I = 0; I <5; I ++) {Person person = new Person (); person. setAge (I + 20 + ""); person. setId (I); person. setName ("loonggg" + I); person. setSex ("male"); person. setAddress ("Zhongnanhai" + I + 1 + ""); list. add (person);} btn_create.setOnClickListener (new View. onClickListener () {@ Override public void onClick (View v) {createXml () ;}}); btn_pull.setOnClickListener (new View. onClickListener () {@ Override public void onClick (View v) {TV _show.setText (pullXml (). toString ());}});}}