Write read XML in Android

The basic idea of getting an XML file is to get the Xmlresourceparser object through the XML raw file obtained by Getresources (). GETXML (), which determines whether the beginning or end of a document is the beginning or the end of a tag, And through some methods of obtaining properties to traverse the XML file, so as to access the contents of the XML file, the following is an example of accessing the contents of the XML file, and display the content on a TextView

Data is written to XML:

Readxmltest.java

[Java]View Plaincopy

2. XML data Generation
4. private String writetostring () {
6. XmlSerializer serializer = Xml.newserializer ();
8. StringWriter writer = new StringWriter ();
10. try {
12. Serializer.setoutput (writer);
14. Serializer.startdocument ("Utf-8", true);
16. Serializer.starttag ("", "users");
20. Serializer.starttag ("", "UserName");
22. Serializer.text (Txtuser.gettext (). toString ());
24. Serializer.endtag ("", "UserName");
28. Serializer.starttag ("", "UserEmail");
30. Serializer.text (Txtemail.gettext (). toString ());
32. Serializer.endtag ("", "UserEmail");
36. Serializer.starttag ("", "PassWord");
38. Serializer.text (Txtpass.gettext (). toString ());
40. Serializer.endtag ("", "PassWord");
44. Serializer.endtag ("", "users");
46. Serializer.enddocument ();
50. } catch (IllegalArgumentException e) {
52. //Todo:handle exception
54. E.printstacktrace ();
56. } catch (IllegalStateException e) {
58. //Todo:handle exception
60. E.printstacktrace ();
62. } catch (IOException e) {
64. //Todo:handle exception
66. E.printstacktrace ();
68. }
70. return writer.tostring ();
72. }
76. //Save the string as a private file of the APK
78. Private Boolean writetoxml (String str) {
80. try {
84. OutputStream out = Openfileoutput ("Users.xml", mode_private);
86. OutputStreamWriter outwriter = new OutputStreamWriter (out);
88. try {
90. Outwriter.write (str);
92. Outwriter.close ();
94. Out.close ();
96. return true;
98. } catch (IOException e) {
100. //Todo:handle exception
102. return false;
104. }
106. } catch (Exception e) {
108. //Todo:handle exception
110. return false;
112. }
114. }

When called:

if (Writetoxml (writetostring ()))

{

Success

}

Data Read xml:

[Java]View Plaincopy

1. tag, the node name deposited

[Java]View Plaincopy

2. private string Readxmluser (String tag)
4. {
6. String re="";
8. Documentbuilderfactory documentbuilderfactory;
10. Documentbuilder Documentbuilder;
12. Document document;
14. try {
16. Documentbuilderfactory=documentbuilderfactory.newinstance ();
18. Documentbuilder=documentbuilderfactory.newdocumentbuilder ();
20. //xml files into the assets directory
22. Document=documentbuilder.parse (this.openfileinput ("Users.xml"));
24. Org.w3c.dom.Element root= document.getdocumentelement ();
26. NodeList nodelist=root.getelementsbytagname (tag);
28. Node Nd=nodelist.item (0);
30. Re= nd.getfirstchild (). Getnodevalue ();
32. } catch (Exception e) {
34. //Todo:handle exception
36. E.printstacktrace ();
38. }finally{
40. document=null;
42. documentbuilder=null;
44. documentbuilderfactory=null;
46. }
48. return re;
50. }

http://blog.csdn.net/hanjingjingpan/article/details/8812770