android XMl 解析神奇xstream 五: 把複雜物件轉換成 xml ,並寫入SD卡中的xml檔案,androidxstream

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android XMl 解析神奇xstream 五: 把複雜物件轉換成 xml ,並寫入SD卡中的xml檔案,androidxstream

前言:對xstream不理解的請看:

android XMl 解析神奇xstream 一: 解析android項目中 asset 檔案夾 下的 aa.xml 檔案

android XMl 解析神奇xstream 二: 把對象轉換成xml

android XMl 解析神奇xstream 三: 把複雜物件轉換成 xml

android XMl 解析神奇xstream 四: 將複雜的xml檔案解析為對象

 

1、建立JavaBeen

package com.android10;public class Person {    String pName ;    String pAge  ;        public String getpName() {        return pName;    }    public void setpName(String pName) {        this.pName = pName;    }    public String getpAge() {        return pAge;    }    public void setpAge(String pAge) {        this.pAge = pAge;    } }

 

package com.android10;public class Product {    private String name ;    private String age  ;    private Person person ;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getAge() {        return age;    }    public void setAge(String age) {        this.age = age;    }    public Person getPerson() {        return person;    }    public void setPerson(Person person) {        this.person = person;    }}


2、工具類代碼

package com.android10;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStreamWriter;import android.content.Context;import android.os.Environment;public class XstreamUtil {    XcallBack xcallBack ;    /**     * 把xml字串寫入SD卡檔案     * @param context     * @param str    xml字串     */    public void writeToXml(Context context, String str ){          //擷取檔案路徑        String SDPATH = Environment.getExternalStorageDirectory()  + "/myfile1.xml/" ;        //建立檔案        File file = new File( SDPATH ) ;        if( !file.exists() ){            try {                file.createNewFile() ;            } catch (IOException e) {                e.printStackTrace();            }         }        //寫入資料        try {            FileOutputStream out = new FileOutputStream( file ) ;            OutputStreamWriter outw = new OutputStreamWriter(out);              try {                  outw.write(str);                  outw.close();                  out.close();                  xcallBack.success();             } catch (IOException e) {                  xcallBack.fail();             }          } catch (FileNotFoundException e1) {            e1.printStackTrace();            xcallBack.fail();         }    }     void setXStreamLister( XcallBack xcallBack ){        this.xcallBack = xcallBack ;    }}interface XcallBack{    /**     * 寫入成功     */    void success() ;      /**     * 寫入失敗     */    void fail() ;     }


3、主要方法

package com.android10;import android.app.Activity;import android.os.Bundle;import android.widget.Toast;import com.thoughtworks.xstream.XStream;public class MainActivity extends Activity {    @Override    public void onCreate(Bundle savedInstanceState)  {        super.onCreate(savedInstanceState);        setContentView( R.layout.activity_main );        Person person = new Person() ;        person.setpName( "saliy" ) ;        person.setpAge( "36" );        Product product = new Product() ;        product.setName( "jhon" ) ;        product.setAge( "30" );        product.setPerson( person );        //將對象轉化為xml字串        XStream xstream = new XStream() ;        //設定別名        xstream.alias( "blog" , Product.class ) ;         String string = xstream.toXML( product ) ;        XstreamUtil xUtil = new XstreamUtil() ;        xUtil.setXStreamLister( new XcallBack() {            @Override            public void success() {                Toast.makeText( MainActivity.this , "成功了 ", Toast.LENGTH_SHORT ).show();             }            @Override            public void fail() {                Toast.makeText( MainActivity.this , "失敗了 ", Toast.LENGTH_SHORT ).show();             }        });        xUtil.writeToXml( this , string );    }}

 

4、運行結果

 

<blog>
  <age>30</age>
  <name>jhon</name>
  <person>
    <pAge>36</pAge>
    <pName>saliy</pName>
  </person>
</blog>

 

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