读取XML的问题
利用SAX读取写了代码，调试了一下午却一直在parse里抛异常。尼玛，Java的库函数还真心不怎么好用。
把代码贴上来先：
package com.example.gulanfinddemo;
import java.io.IOException;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
public class MainActivity extends Activity {
private Spinner suraIDpinner;
private QuranXmlParser quranXmlParser;
final public static String ExtraStr = "FindRes";
private static final String[] m={"1","2","3","4","5"};
private ArrayAdapter<String> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
quranXmlParser = new QuranXmlParser();
Log.v("MainActivity", "1");
try {
quranXmlParser.ReadXML("GuLan.xml");
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
InitSuraIDSpinner();
suraIDpinner.setPrompt("请输入将要查询的章树");
//设置下拉列表的风格
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item,m);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
//将adapter 添加到spinner中
suraIDpinner.setAdapter(adapter);
}
public void InitSuraIDSpinner(){
suraIDpinner = (Spinner)findViewById(R.id.SuraIDSpinner);
}
public void onClickSuraAyaFindBtn(View view){
Intent intent = new Intent(this, FindResActivity.class);
String selectedString = suraIDpinner.getSelectedItem().toString();
if(null==selectedString){
selectedString="NoThing";
}
intent.putExtra(ExtraStr, selectedString);
startActivity(intent);
}
}
新建一个FindResActivity，显示结果：
package com.example.gulanfinddemo;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.widget.TextView;
public class FindResActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_find_res);
Intent intent = getIntent();
String findReString = intent.getStringExtra(MainActivity.ExtraStr);
TextView resText = (TextView)findViewById(R.id.ResText);
resText.setText(findReString);
}
}
一个QuranXmlParser类：
package com.example.gulanfinddemo;
import java.io.IOException;
import java.io.StringReader;
import java.util.HashMap;
import java.util.Map;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import android.util.Log;
public class QuranXmlParser{
private String m_res;
private volatile boolean m_isDoFind;
public QuranXmlParser(){
m_isDoFind=false;
}
public boolean ReadXML(String xmlString) throws ParserConfigurationException, SAXException, IOException{
Log.v("ReadXML", "1");
XMLHandler handler = new XMLHandler();
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
parser.parse(xmlString,handler);
Log.v("ReadXML", "2");
return true;
}
}
新建一个XMLHandler，负责具体的读取XML：
package com.example.gulanfinddemo;
import java.io.IOException;
import java.io.StringReader;
import java.util.HashMap;
import java.util.Map;
import java.util.jar.Attributes;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import android.R.integer;
import android.util.Log;
import android.util.Pair;
public class XMLHandler extends DefaultHandler{
public static String tag = "XMLHandler";
final int quran = 0;
final int suraID = 1;
final int suraName = 2;
final int aya = 3;
final int qurantext = 4;
int currentState = 0;
String suraIDString;
String suraNameString;
String ayaID;
private HashMap<String, String> m_AyaContentMap;
private Map<String, String> m_SuarIDSet;
private HashMap<String, String> m_Id2IDsHashMap;
public HashMap<String, String> getAyaContentMap(){
return m_AyaContentMap;
}
public Map<String, String> getSuarIDSet(){
return m_SuarIDSet;
}
public HashMap<String, String> getId2IDsHashMap(){
return m_Id2IDsHashMap;
}
public void startElement(String namespacesURI , String localName , String qName , Attributes atts) throws SAXException{
if(localName.equals("sura")){
if(qName.equals("suraID")){
currentState = suraID;
}
else if(qName.equals("suraName")){
currentState = suraName;
}
}
else if(localName.equals("aya")){
currentState = aya;
}
else if (localName.equals("qurantext")){
currentState = qurantext;
}
else if(localName.equals("quran")){
currentState = quran;
}
}
public void endElement(String namespacesURI , String localName , String qName) throws SAXException{
}
public void characters(char[] ch , int start , int length) throws SAXException{
String theString = new String(ch, start, length);
if(null != theString){
}
switch(currentState){
case suraID:{
suraIDString = theString;
}
break;
case suraName:{
suraNameString = theString;
m_SuarIDSet.put(suraIDString, suraNameString);
}
case aya:{
ayaID = theString;
}
break;
case qurantext:{
m_Id2IDsHashMap.put(suraIDString,ayaID);
final String keyString = suraIDString+":"+ayaID;
m_AyaContentMap.put(keyString, theString);
Log.v(tag,keyString+" "+theString);
}
break;
}
}
}
然后主窗口布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView android:id="@+id/keywordLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="关键字查询："
android:paddingTop="15px"
/>
<EditText android:id="@+id/keywordEditText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/keywordLabel"
android:layout_alignBaseline="@id/keywordLabel"
/>
<Button android:id="@+id/findKeywordButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/keywordEditText"
android:layout_alignRight="@id/keywordEditText"
android:text="查找"
/>
<TextView android:id="@+id/ChapterTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="章节查询:"
android:layout_below="@id/findKeywordButton"
android:paddingTop="15px" />
<TextView android:id="@+id/SuraIDText"
android:text="章："
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/ChapterTextView"
/>
<Spinner
android:id="@+id/SuraIDSpinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/SuraIDText"
android:paddingTop="15px" />
<TextView android:id="@+id/AyaIDText"
android:text="节："
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/SuraIDSpinner"
/>
<Spinner android:id="@+id/AyaIDSpinner"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/AyaIDText"
/>
<Button android:id="@+id/findChapterButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/AyaIDSpinner"
android:layout_alignRight="@id/AyaIDSpinner"
android:text="查找"
android:onClick="onClickSuraAyaFindBtn"
/>
</RelativeLayout>
显示结果窗口布局：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".FindResActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/FindResShow" />
<TextView android:id="@+id/ResText"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
主窗口显示：
