Android validating saxparser

Posted by / 28-Aug-2016 17:23

There are many ways to parse XML file in Android, however, the most three common methods are: This is the main interface that most SAX applications implement: if the application needs to be informed of basic parsing events, it implements this interface and registers an instance with the SAX parser using the The order of events in this interface is very important, and mirrors the order of information in the document itself. Study; /* * class Study Handler * */ public class Study Handler extends Default Handler { // members private boolean is Topic; private boolean is Content; private boolean is Author; private boolean is Date; // 'Study' entity to parse private Study m Study; // 'getter' is enough public Study get Study() { return m Study; } /* * (non-Javadoc) * @see sax.helpers. STUDY)) { // get id right away m Study.m Id = Integer.parse Int(Value(Study. Text View; public class Main extends Activity { Text View tv Study; @Override public void on Create(Bundle saved Instance State) { Create(saved Instance State); set Content View(R.layout.main); tv Study = (Text View)find View By Id(text); Study study = null; try { study = Study Parser.parse(get Assets().open("record.xml")); } catch (IOException e) { Log.d("XML","on Create(): parse() failed"); return; } String output = ""; output += "Study ID: " + study.m Id + "\n"; output += "Topic: " + study.m Topic + "\n"; output += "Content: " + study.m Content + "\n"; output += "Author: " + study.m Author + "\n"; output += "Date: " + study.m Date + "\n"; tv Text(output); } } The data displays as expected! If you’re beginner or newbie, just read this article slowly and don’t skim, and you will understand it. For example, all of an element’s content (character data, processing instructions, and/or subelements) will appear, in order, between the start Element event and the corresponding end Element event. Default Handler#start Document() */ @Override public void start Document() throws SAXException { // create new object m Study = new Study(); } /* * (non-Javadoc) * @see sax.helpers. ID)); } // if this element value equals "topic" else if(local Name.equals(Study. There are still more about SAX-Parser, however, I just guide you the most common usage and the most simple concept of parsing XML data using SAX-Parser. CONTENT)) { // uncheck marking is Content = false; } // if this element value equals "topic" else if(local Name.equals(Study. AUTHOR)) { // uncheck marking is Author = false; } // if this element value equals "topic" else if(local Name.equals(Study. You'll be able to ask questions about coding or chat with the community and help others. At the start of the series, I will talk about how to parse XML data. Well, it’s because most of the applications tend to parse XML data from other sources, like RSS, which is very common. Attributes) */ @Override public void start Element(String namespace URI, String local Name, String q Name, Attributes atts) throws SAXException { // if this element value equals "study" if(local Name.equals(Study.Welcome to the Coding Forums, the place to chat about anything related to programming and coding languages.

AUTHOR)) { // mark current element is "author" is Author = true; } // if this element value equals "date" else if(local Name.equals(Study. STUDY)) { // already get the attribute "id", nothing needs to do here } // if this element value equals "topic" else if(local Name.equals(Study. DATE)) { // mark current element is "date" is Date = true; } } /* * (non-Javadoc) * @see sax.helpers. TOPIC)) { // uncheck marking is Topic = false; } // if this element value equals "topic" else if(local Name.equals(Study. Study; public class Study Parser { public static Study parse(Input Stream is) { Study study = null; try { // create a XMLReader from SAXParser XMLReader xml Reader = SAXParser Instance()SAXParser()XMLReader(); // create a Study Handler too Study Handler study Handler = new Study Handler(); // apply handler to the XMLReader xml Content Handler(study Handler); // the process starts xml Reader.parse(new Input Source(is)); // get the target `Study` study = study Study(); } catch(Exception ex) { Log.d("XML", "Study Parser: parse() failed"); } // return Study we found return study; } } package pete.android.study; import package pete.android.study.data; public class Study { public int m Id; public String m Topic; public String m Content; public String m Author; public String m Date; public static final String STUDY = "study"; public static final String ID = "id"; public static final String TOPIC = "topic"; public static final String CONTENT = "content"; public static final String AUTHOR = "author"; public static final String DATE = "date";} package pete.android.study.parser; import sax. Default Handler#end Document() */ @Override public void end Document() throws SAXException { // nothing we need to do here } /* * (non-Javadoc) * @see sax.helpers. TOPIC)) { // mark current element is "topic" is Topic = true; } // if this element value equals "content" else if(local Name.equals(Study. CONTENT)) { // mark current element is "content" is Content = true; } // if this element value equals "author" else if(local Name.equals(Study. String) */ @Override public void end Element(String namespace URI, String local Name, String q Name) throws SAXException { if(local Name.equals(Study. DATE)) { // uncheck marking is Date = false; } } /* * (non-Javadoc) * @see sax.helpers.

android validating saxparser-84android validating saxparser-67android validating saxparser-76

Default Handler#characters(char[], int, int) */ @Override public void characters(char ch[], int start, int length) { // get all text value inside the element tag String chars = new String(ch, start, length); chars = chars.trim(); // remove all white-space characters // if this tag is "topic", set "topic" value if(is Topic) m Study.m Topic = chars; // if this tag is "content", set "content" value else if(is Content) m Study.m Content = chars; // if this tag is "author", set "author" value else if(is Author) m Study.m Author = chars; // if this tag is "date", set "date" value else if(is Date) m Study.m Date = chars; } } package pete.android.study.parser; import

One thought on “android validating saxparser”