xml解析之XmlPullParser解析器
阿新 • • 發佈:2019-01-31
程式碼目錄結構
HobInfo實體類程式碼
package cn.itcast.person; import android.R.integer; public class HobInfo { private int id; private String city; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } private String message; }
解析器實現程式碼
解析器與實體類呼叫程式碼package cn.itcast.person; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import org.xml.sax.Parser; import org.xmlpull.v1.XmlPullParser; import android.R.integer; import android.util.Xml; public class HobSeriver { public static List<HobInfo>serivers( InputStream is)throws Exception{ XmlPullParser parser=Xml.newPullParser(); parser.setInput(is, "utf-8"); List<HobInfo> hobInfos=null; HobInfo hobInfo=null; int type=parser.getEventType(); while(type!=XmlPullParser.END_DOCUMENT){ switch (type) { case XmlPullParser.START_TAG: if("infos".equals(parser.getName())){ hobInfos=new ArrayList<HobInfo>(); }else if("person".equals(parser.getName())){ hobInfo=new HobInfo(); String ids=parser.getAttributeValue(0); hobInfo.setId(Integer.parseInt(ids)); }else if("city".equals(parser.getName())){ String cString=parser.nextText(); hobInfo.setCity(cString); } else if("message".equals(parser.getName())){ String mString=parser.nextText(); hobInfo.setMessage(mString); } break; case XmlPullParser.END_TAG: if("person".equals(parser.getName())){ hobInfos.add(hobInfo); hobInfo=null; } break; } type=parser.next(); } return hobInfos; } }
package cn.itcast.person; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import android.app.Activity; import android.os.Bundle; import android.os.Message; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity { private Map<String, String> map; private List<Map<String, String>> list; private TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button button1=(Button)findViewById(R.id.button1); Button button2=(Button)findViewById(R.id.button2); textView=(TextView)findViewById(R.id.textview); try{ List<HobInfo> infos=HobSeriver.serivers(MainActivity.this.getClassLoader().getResourceAsStream("person.xml")); list=new ArrayList<Map<String,String>>(); for(HobInfo a:infos){ map=new HashMap<String, String>(); map.put("city", a.getCity()); map.put("message", a.getMessage()); list.add(map); } }catch(Exception e){ e.printStackTrace(); Toast.makeText(getApplicationContext(), "解析失敗", Toast.LENGTH_SHORT); } button1.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub getMaps(0); } }); button2.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub getMaps(1); } }); } private void getMaps(Integer i){ Map<String, String> bjmapMap=list.get(i); String messageString=bjmapMap.get("message"); textView.setText(messageString); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }
然後給上xml佈局檔案
<LinearLayout 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:orientation="vertical"
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="cn.itcast.person.MainActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="@+id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="沒有選擇按鈕" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="天津" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="北京" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
最後清單檔案
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="cn.itcast.person"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="15"
android:targetSdkVersion="22" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="cn.itcast.person.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
值得注意的是package的命名,建議類似cn.musa.dad的結構,而且如果更改包名,請注意在執行之前在更改清單檔案之中的相應包名