Android Base--xml serialization (XmlSerializer)

1. JavaBean of the Encapsulation node

 Public classCity {PrivateString name; PrivateString temp; PrivateString PM25;  PublicString GetName () {returnname; }     Public voidsetName (String name) { This. Name =name; }     PublicString gettemp () {returntemp; }     Public voidsettemp (String temp) { This. temp =temp; }     PublicString getPm25 () {returnPM25; }     Public voidsetPm25 (String pm25) { This. PM25 =PM25; } @Override PublicString toString () {return"City [name=" + name + ", temp=" + temp + ", pm25=" + PM25 + "]"; }     PublicCity (string name, String temp, string pm25) {Super();  This. Name =name;  This. temp =temp;  This. PM25 =PM25; }     PublicCity () {Super(); }    }

2. Generate XML Mainactivity.java, where Createxmlfile is a click event bound on a button control

 PackageCom.itheima.xmlserializer;ImportJava.io.File;ImportJava.io.FileOutputStream;ImportJava.io.OutputStream;Importjava.util.ArrayList;Importjava.util.List;ImportOrg.xmlpull.v1.XmlSerializer;Importandroid.app.Activity;ImportAndroid.os.Bundle;Importandroid.os.Environment;Importandroid.util.Xml;ImportAndroid.view.View;Importcom.itheima.xmlserializer.domain.City; Public classMainactivityextendsActivity {List<City>CityList; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); CityList=NewArraylist<city>(); City City=NULL;  for(inti = 0; I < 5; i++) { City=NewCity ("Cities" + I, + i + "", + + i + ""));        Citylist.add (city); }    }     Public voidCreatexmlfile (View v) {//determine if the current SD card is available        if(Environment.getexternalstoragestate (). Equals (environment.media_mounted)) {//specify where to store the XML fileFile File =NewFile (Environment.getexternalstoragedirectory (),"Info.xml"); //get the XML serializerXmlSerializer xs =Xml.newserializer (); OutputStream OS=NULL; Try {                //outputstream: Specify the save path for the file//Encoding: Specifies the encoding of the generated XML fileOS =Newfileoutputstream (file); Xs.setoutput (OS,"UTF-8"); //To start generating files//set the first line of the XML file <?xml encoding =? standalone=?>Xs.startdocument ("UTF-8",true); //generate root node start tagXs.starttag (NULL, "Weather");  for(city city:citylist) {Xs.starttag (NULL, "City"); Xs.starttag (NULL, "name"); //Generating text nodesXs.text (City.getname ()); Xs.endtag (NULL, "name"); Xs.starttag (NULL, "temp"); //Generating text nodesXs.text (City.gettemp ()); Xs.endtag (NULL, "temp"); Xs.starttag (NULL, "PM25"); //Generating text nodesXs.text (CITY.GETPM25 ()); Xs.endtag (NULL, "PM25"); Xs.endtag (NULL, "City"); }                //Generate root node end tagXs.endtag (NULL, "Weather");            Xs.enddocument (); } Catch(Exception e) {Throw NewRuntimeException (e); }        }    }}

3. The resulting XML file is as follows, because there is no line break and all readability is poor

<?XML version= ' 1.0 ' encoding= ' UTF-8 ' standalone= ' yes '?><Weather>< City><name>City 0</name><Temp>20</Temp><PM25>100</PM25></ City>< City><name>City 1</name><Temp>21st</Temp><PM25>101</PM25></ City>< City><name>City 2</name><Temp>22</Temp><PM25>102</PM25></ City>< City><name>City 3</name><Temp>23</Temp><PM25>103</PM25></ City>< City><name>City 4</name><Temp>24</Temp><PM25>104</PM25></ City></Weather>

Android Base--xml serialization (XmlSerializer)