的Android的SAXParser,解析到数组,并得到子节点 [英] Android SAXParser, parse into array and get child nodes
问题描述
我正在使用一个小的应用程序和XML文件打印章节的ArrayList这又指向一个特定的HTML文件。
我用这个教程让我开始:<一href=\"http://www.anddev.org/novice-tutorials-f8/parsing-xml-from-the-net-using-the-saxparser-t353.html\" rel=\"nofollow\">http://www.anddev.org/novice-tutorials-f8/parsing-xml-from-the-net-using-the-saxparser-t353.html
我的xml文件看起来是这样的:
&LT;&章GT;
&LT;章节标题=Förutsättningar&GT;
&LT;页面标题=思达3URL =sida_3.html/&GT;
&LT;页面标题=思达4URL =sida_4.html/&GT;
&LT; /章节&GT;
&LT; /章节&GT;
使用上面的教程我已经成功地输出每章节点与在每个项目上onListItemClick功能的ArrayList。到目前为止好。
我遇到的问题是,我无法弄清楚如何获得特定的子节点,并加载HTML文件时,我点击一个项目。我是pretty新到Android。
任何想法?我真的AP preciate任何关于这个问题的帮助。
下面是我的源代码:
ParsingXML.java
公共类ParsingXML扩展ListActivity {
私人最终字符串MY_DEBUG_TAG =XmlParser的;
公共字符串LANG = NULL;@覆盖
公共无效的onCreate(捆绑冰柱){
super.onCreate(冰柱);
的setTitle(Lastsäkring); 束束= this.getIntent()getExtras()。
LANG = bundle.getString(郎); Log.i(ParsingXML,选择的语言:+ this.lang +,类型:。+ this.lang.getClass()的getName()); TextView的电视=新的TextView(本); 尝试{
SPF SAXParserFactory的= SAXParserFactory.newInstance();
的SAXParser SP = spf.newSAXParser(); XMLReader的XR = sp.getXMLReader(); ExampleHandler myExampleHandler =新ExampleHandler();
xr.setContentHandler(myExampleHandler); / *
*如果XML文件位于网络(互联网需要的权限清单):
*网址URL =新的URL(http://dev.houdini.se/android/demo.xml);
* xr.parse(新的InputSource(url.openStream()));
* / 如果(this.lang.equals(EN))
xr.parse(新的InputSource(this.getResources()openRawResource(R.raw.en_content)));
其他
xr.parse(新的InputSource(this.getResources()openRawResource(R.raw.sv_content))); ParsedExampleDataSet parsedExampleDataSet = myExampleHandler.getParsedData();
this.setListAdapter(新ArrayAdapter&所述;字符串&GT;(此,android.R.layout.simple_list_item_1,parsedExampleDataSet.toArrayList())); }赶上(例外五){
tv.setText(错误:+ e.getMessage());
Log.e(MY_DEBUG_TAG,XmlParseError,E);
this.setContentView(电视);
}
}保护无效onListItemClick(ListView中升,视图V,INT位置,长的id){
super.onListItemClick(L,V,位置ID);
上下文的背景下= getApplicationContext();
INT持续时间= Toast.LENGTH_SHORT; CharSequence的文字=点击位置:+位置+,ID:+ ID;
吐司面包= Toast.makeText(背景,文本,持续时间);
toast.show();
/ *开关(位置)
{
情况下0:
束束=新包();
bundle.putString(WINDOWTITLE,种皮);
意向意图=新意图(这一点,TextPage.class);
intent.putExtras(包);
startActivity(意向);
打破;
情况1:
意图视频=新意图(这一点,Video.class);
startActivity(视频)
打破; 案例2:
意图刷卡=新意图(这一点,Swipe.class);
startActivity(刷卡);
打破;
} * /
}公共布尔onCreateOptionsMenu(菜单菜单){
MenuInflater吹气= getMenuInflater();
inflater.inflate(R.menu.options_menu,菜单);
返回true;
}@覆盖
公共布尔onOptionsItemSelected(菜单项项){
//处理项目选择
开关(item.getItemId()){
案例R.id.settings:
意向prefsActivity =新意图(getBaseContext(),preferences.class);
startActivity(prefsActivity);
返回true;
默认:
返回super.onOptionsItemSelected(项目);
}
}
}
ExampleHandler.java
公共类ExampleHandler扩展的DefaultHandler {
私人布尔in_chapters = FALSE;
私人布尔in_chapter = FALSE;
私人布尔IN_PAGE = FALSE;私人ParsedExampleDataSet myParsedExampleDataSet =新ParsedExampleDataSet();公共ParsedExampleDataSet getParsedData(){
返回this.myParsedExampleDataSet;
}@覆盖
公共无效startDocument()抛出的SAXException {
this.myParsedExampleDataSet =新ParsedExampleDataSet();
}@覆盖
公共无效调用endDocument()抛出的SAXException {
// 没事做
}@覆盖
公共无效的startElement(字符串的namespaceURI,字符串的localName,字符串QNAME,属性的ATT)抛出的SAXException {
如果(localName.equals(章)){
this.in_chapters = TRUE;
}否则如果(localName.equals(章)){
this.in_chapter = TRUE;
字符串attrValue = atts.getValue(标题);
myParsedExampleDataSet.setExtractedString(attrValue);
}否则如果(localName.equals(页)){
this.in_page =真;
}
}@覆盖
公共无效的endElement(字符串的namespaceURI,字符串的localName,字符串QNAME)抛出的SAXException {
如果(localName.equals(章)){
this.in_chapters = FALSE;
}否则如果(localName.equals(章)){
this.in_chapter = FALSE;
}否则如果(localName.equals(页)){
this.in_page = FALSE;
}
}@覆盖
公共无效字符(字符CH [],诠释开始,诠释长度){
如果(this.in_page ==真){
myParsedExampleDataSet.setExtractedString(新的String(CH,开始位置,长度));
}
}}
ParsedExampleDataSet.java
公共类ParsedExampleDataSet {
私人字符串extractedString =;
私人的ArrayList&LT;串GT; myArr,该=新的ArrayList&LT;串GT;();
私人INT extractedInt = 0;公众的ArrayList&LT;串GT; getExtractedString(){
//返回extractedString;功能类型=字符串
返回myArr,该;
}公共无效setExtractedString(字符串extractedString){
//this.extractedString + = extractedString +\\ n;
myArr.add(extractedString);
}公众诠释getExtractedInt(){
返回extractedInt;
}公共无效setExtractedInt(INT extractedInt){
this.extractedInt = extractedInt;
}公共字符串的toString(){
回归NODER \\ n+ this.extractedString;
}公众的ArrayList&LT;串GT; toArrayList(){
返回this.myArr;
}
}
首先建立正确的数据结构:
公共类PageNode {
公共字符串称号;
公共字符串的URL;
/ *吸气剂/ setter方法/构造等,如果你喜欢* /
公共字符串的toString(){
返回称号;
}
}公共类ChapterNode {
公共字符串称号;
公众的ArrayList&LT; PageNode&GT;页=新的ArrayList&LT; PageNode&GT;();
/ *吸气剂/ setter方法/构造等,如果你喜欢* /
}
和相应的解析XML。例如:
的ArrayList&LT; ChapterNode&GT;章=新的ArrayList&LT; ChapterNode&GT;();
ChapterNode chapterNode = NULL;公共无效的startElement(字符串的namespaceURI,字符串的localName,字符串QNAME,属性的ATT)抛出的SAXException {
如果(localName.equals(章)){
}否则如果(localName.equals(章)){
chapterNode =新ChapterNode();
chapterNode.title = atts.getValue(标题);
}否则如果(localName.equals(页)){
PageNode pageNode =新PageNode();
pageNode.title = atts.getValue(标题);
pageNode.url = atts.getValue(URL);
chapterNode.pages.add(pageNode);
}
}@覆盖
公共无效的endElement(字符串的namespaceURI,字符串的localName,字符串QNAME)抛出的SAXException {
如果(localName.equals(章)){
}否则如果(localName.equals(章)){
chapters.add(chapterNode);
chapterNode = NULL;
}否则如果(localName.equals(页)){
}
}
然后就可以访问pageNode是这样的:
PageNode pageNode = chapterNode.pages.get(位置);
和设置适配器是这样的:
this.setListAdapter(新ArrayAdapter&LT;串GT;(这一点,android.R.layout.simple_list_item_1,chapterNode.pages));
I'm working on a small app that uses and xml file to print an ArrayList of chapters which in turn points to a specific html file.
I used this tutorial to get me started: http://www.anddev.org/novice-tutorials-f8/parsing-xml-from-the-net-using-the-saxparser-t353.html
My xml file looks something like this:
<chapters>
<chapter title="Förutsättningar">
<page title="Sida 3" url="sida_3.html" />
<page title="Sida 4" url="sida_4.html" />
</chapter>
</chapters>
Using the tutorial above I've managed to output each chapter node into an ArrayList with a onListItemClick function on each item. So far so good.
The problem I'm having is that I can't figure out how to get a specific child node and load the html file when I click an item. I'm pretty new to Android.
Any ideas? I would really appreciate ANY help on the subject.
Here's my source:
ParsingXML.java
public class ParsingXML extends ListActivity {
private final String MY_DEBUG_TAG = "XmlParser";
public String lang = null;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setTitle("Lastsäkring");
Bundle bundle = this.getIntent().getExtras();
lang = bundle.getString("lang");
Log.i("ParsingXML", "Chosen language: " + this.lang + ", Type: " + this.lang.getClass().getName());
TextView tv = new TextView(this);
try {
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
ExampleHandler myExampleHandler = new ExampleHandler();
xr.setContentHandler(myExampleHandler);
/*
* If XML-file is located online (needs internet permissions in the manifest):
* URL url = new URL("http://dev.houdini.se/android/demo.xml");
* xr.parse(new InputSource(url.openStream()));
*/
if(this.lang.equals("en"))
xr.parse(new InputSource(this.getResources().openRawResource(R.raw.en_content)));
else
xr.parse(new InputSource(this.getResources().openRawResource(R.raw.sv_content)));
ParsedExampleDataSet parsedExampleDataSet = myExampleHandler.getParsedData();
this.setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, parsedExampleDataSet.toArrayList()));
} catch(Exception e) {
tv.setText("Error: " + e.getMessage());
Log.e(MY_DEBUG_TAG, "XmlParseError", e);
this.setContentView(tv);
}
}
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Context context = getApplicationContext();
int duration = Toast.LENGTH_SHORT;
CharSequence text = "Clicked position: " + position + ", id: " + id;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
/*switch( position )
{
case 0:
Bundle bundle = new Bundle();
bundle.putString("WindowTitle", "TESTA");
Intent intent = new Intent(this, TextPage.class);
intent.putExtras(bundle);
startActivity(intent);
break;
case 1:
Intent video = new Intent(this, Video.class);
startActivity(video);
break;
case 2:
Intent swipe = new Intent(this, Swipe.class);
startActivity(swipe);
break;
}*/
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.options_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.settings:
Intent prefsActivity = new Intent(getBaseContext(), Preferences.class);
startActivity(prefsActivity);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
ExampleHandler.java
public class ExampleHandler extends DefaultHandler {
private boolean in_chapters = false;
private boolean in_chapter = false;
private boolean in_page = false;
private ParsedExampleDataSet myParsedExampleDataSet = new ParsedExampleDataSet();
public ParsedExampleDataSet getParsedData() {
return this.myParsedExampleDataSet;
}
@Override
public void startDocument() throws SAXException {
this.myParsedExampleDataSet = new ParsedExampleDataSet();
}
@Override
public void endDocument() throws SAXException {
// Nothing to do
}
@Override
public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
if(localName.equals("chapters")) {
this.in_chapters = true;
} else if(localName.equals("chapter")) {
this.in_chapter = true;
String attrValue = atts.getValue("title");
myParsedExampleDataSet.setExtractedString(attrValue);
} else if(localName.equals("page")) {
this.in_page = true;
}
}
@Override
public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
if(localName.equals("chapters")) {
this.in_chapters = false;
} else if(localName.equals("chapter")) {
this.in_chapter = false;
} else if(localName.equals("page")) {
this.in_page = false;
}
}
@Override
public void characters(char ch[], int start, int length) {
if(this.in_page == true) {
myParsedExampleDataSet.setExtractedString(new String(ch, start, length));
}
}
}
ParsedExampleDataSet.java
public class ParsedExampleDataSet {
private String extractedString = "";
private ArrayList<String> myArr = new ArrayList<String>();
private int extractedInt = 0;
public ArrayList<String> getExtractedString() {
//return extractedString; Function Type = String
return myArr;
}
public void setExtractedString(String extractedString) {
//this.extractedString += extractedString + "\n";
myArr.add(extractedString);
}
public int getExtractedInt() {
return extractedInt;
}
public void setExtractedInt(int extractedInt) {
this.extractedInt = extractedInt;
}
public String toString() {
return "NODER\n" + this.extractedString;
}
public ArrayList<String> toArrayList() {
return this.myArr;
}
}
First create proper data structure:
public class PageNode {
public String title;
public String url;
/* Getters/setter/constructor etc. if you feel like*/
public String toString() {
return title;
}
}
public class ChapterNode {
public String title;
public ArrayList<PageNode> pages = new ArrayList<PageNode>();
/* Getters/setter/constructor etc. if you feel like*/
}
And parse the xml accordingly. Example:
ArrayList<ChapterNode> chapters = new ArrayList<ChapterNode>();
ChapterNode chapterNode = null;
public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
if(localName.equals("chapters")) {
} else if(localName.equals("chapter")) {
chapterNode = new ChapterNode();
chapterNode.title = atts.getValue("title");
} else if(localName.equals("page")) {
PageNode pageNode = new PageNode();
pageNode.title = atts.getValue("title");
pageNode.url = atts.getValue("url");
chapterNode.pages.add(pageNode);
}
}
@Override
public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
if(localName.equals("chapters")) {
} else if(localName.equals("chapter")) {
chapters.add(chapterNode);
chapterNode = null;
} else if(localName.equals("page")) {
}
}
Then you can access the pageNode like this:
PageNode pageNode = chapterNode.pages.get(position);
And set adapter like this:
this.setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, chapterNode.pages));
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