這篇文章給大家介紹Android開(kāi)發(fā)中解析xml的方法有哪些,內(nèi)容非常詳細(xì),感興趣的小伙伴們可以參考借鑒,希望對(duì)大家能有所幫助。
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第一步:新建一個(gè)Android工程,命名為XmlDemo
第二步:修改main.xml布局文件,代碼如下:
<?xmlversion="1.0"encoding="utf-8"?> <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <Button android:id="@+id/btn1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="創(chuàng)建XML文件" /> <Button android:id="@+id/btn2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="DOM解析XML" /> <Button android:id="@+id/btn3" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="XmlPullParse解析XML" /> <TextView android:id="@+id/result" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </LinearLayout>
第三步:修改主核心程序XmlDemo.Java,代碼如下:
package com.tutor.xml; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserException; import org.xmlpull.v1.XmlPullParserFactory; import org.xmlpull.v1.XmlSerializer; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.util.Xml; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class XmlDemo extendsActivity implementsOnClickListener { privatestatic final String BOOKS_PATH = "/sdcard/books.xml"; privateButton mButton1, mButton2, mButton3; privateTextView mTextView; @Override publicvoid onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); setupViews(); } // 初始化工作 privatevoid setupViews() { mTextView = (TextView) findViewById(R.id.result); mButton1 = (Button) findViewById(R.id.btn1); mButton2 = (Button) findViewById(R.id.btn2); mButton3 = (Button) findViewById(R.id.btn3); mButton1.setOnClickListener(this); mButton2.setOnClickListener(this); mButton3.setOnClickListener(this); } // 創(chuàng)建xml文件 privatevoid createXmlFile() { File linceseFile =new File(BOOKS_PATH); try{ linceseFile.createNewFile(); }catch (IOException e) { Log.e("IOException","exception in createNewFile() method"); } FileOutputStream fileos =null; try{ fileos =new FileOutputStream(linceseFile); }catch (FileNotFoundException e) { Log.e("FileNotFoundException","can't create FileOutputStream"); } XmlSerializer serializer = Xml.newSerializer(); try{ serializer.setOutput(fileos,"UTF-8"); serializer.startDocument(null,true); serializer.startTag(null,"books"); for(int i = 0; i < 3; i++) { serializer.startTag(null,"book"); serializer.startTag(null,"bookname"); serializer.text("Android教程"+ i); serializer.endTag(null,"bookname"); serializer.startTag(null,"bookauthor"); serializer.text("Frankie"+ i); serializer.endTag(null,"bookauthor"); serializer.endTag(null,"book"); } serializer.endTag(null,"books"); serializer.endDocument(); serializer.flush(); fileos.close(); }catch (Exception e) { Log.e("Exception","error occurred while creating xml file"); } Toast.makeText(getApplicationContext(),"創(chuàng)建xml文件成功!", Toast.LENGTH_SHORT).show(); } // dom解析xml文件 privatevoid domParseXML() { File file =new File(BOOKS_PATH); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db =null; try{ db = dbf.newDocumentBuilder(); }catch (ParserConfigurationException e) { e.printStackTrace(); } Document doc =null; try{ doc = db.parse(file); }catch (SAXException e) { e.printStackTrace(); }catch (IOException e) { e.printStackTrace(); } Element root = doc.getDocumentElement(); NodeList books = root.getElementsByTagName("book"); String res ="本結(jié)果是通過(guò)dom解析:" +"/n"; for(int i = 0; i < books.getLength(); i++) { Element book = (Element) books.item(i); Element bookname = (Element) book.getElementsByTagName("bookname") .item(0); Element bookauthor = (Element) book.getElementsByTagName( "bookauthor").item(0); res +="書(shū)名: " + bookname.getFirstChild().getNodeValue() +" " +"作者: " + bookauthor.getFirstChild().getNodeValue() +"/n"; } mTextView.setText(res); } // xmlPullParser解析xml文件 privatevoid xmlPullParseXML() { String res ="本結(jié)果是通過(guò)XmlPullParse解析:" + "/n"; try{ XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); XmlPullParser xmlPullParser = factory.newPullParser(); xmlPullParser.setInput(Thread.currentThread() .getContextClassLoader().getResourceAsStream(BOOKS_PATH), "UTF-8"); inteventType = xmlPullParser.getEventType(); try{ while(eventType != XmlPullParser.END_DOCUMENT) { String nodeName = xmlPullParser.getName(); switch(eventType) { caseXmlPullParser.START_TAG: if("bookname".equals(nodeName)) { res +="書(shū)名: " + xmlPullParser.nextText() +" "; }else if("bookauthor".equals(nodeName)) { res +="作者: " + xmlPullParser.nextText() +"/n"; } break; default: break; } eventType = xmlPullParser.next(); } }catch (IOException e) { e.printStackTrace(); } }catch (XmlPullParserException e) { e.printStackTrace(); } mTextView.setText(res); } // 按鈕事件響應(yīng) publicvoid onClick(View v) { if(v == mButton1) { createXmlFile(); }else if(v == mButton2) { domParseXML(); }else if(v == mButton3) { xmlPullParseXML(); } } }
第四步:由于我們?cè)赟d卡上新建了文件,需要增加權(quán)限,如下代碼(第13行):
<?xmlversion="1.0"encoding="utf-8"?> <manifestxmlns:android="http://schemas.android.com/apk/res/android" package="com.tutor.xml"android:versionCode="1"android:versionName="1.0"> <applicationandroid:icon="@drawable/icon"android:label="@string/app_name"> <activityandroid:name=".XmlDemo"android:label="@string/app_name"> <intent-filter> <actionandroid:name="android.intent.action.MAIN"/> <categoryandroid:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> </application> <uses-sdkandroid:minSdkVersion="7"/> <uses-permissionandroid:name="android.permission.WRITE_EXTERNAL_STORAGE"/> </manifest>
第五步:運(yùn)行上述工程,查看效果:
啟動(dòng)首界面:
點(diǎn)擊創(chuàng)建XML文件按鈕,生成books.xml文件
books.xml內(nèi)容如下:
<?xmlversion='1.0'encoding='UTF-8'standalone='yes'?> <books> <book> <bookname>Android教程0</bookname> <bookauthor>Frankie0</bookauthor> </book> <book> <bookname>Android教程1</bookname> <bookauthor>Frankie1</bookauthor> </book> <book> <bookname>Android教程2</bookname> <bookauthor>Frankie2</bookauthor> </book> </books>
點(diǎn)擊DOM解析XML按鈕:
點(diǎn)擊XmlPullParse解析XML按鈕:
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文章名稱:Android開(kāi)發(fā)中解析xml的方法有哪些
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