在Android中通过XFire WebService远程上传以及下载图片

    有时我们可以看到，图片往往被提交到服务器端，这里我通过XFire框架来实现远程上传以及下载图片的功能。

首先我们来看看从服务器端下载图片的功能：

我用的是KSOAP框架，我之前的文章有讲述过。在这里不要多说，贴上代码。

首先我们看看Acitivity中的代码：

package com.net.connect.app;  import java.io.File;  import java.io.FileInputStream;  import android.app.Activity;  import android.graphics.Bitmap;  import android.graphics.BitmapFactory;  import android.os.Bundle;  import android.view.View;  import android.view.View.OnClickListener;  import android.widget.Button;  import android.widget.ImageView;  import android.widget.Toast;  import com.base.encry.decry.app.Base64;  import com.base.file.util.FileOperate;  import com.cn.blogs.ksoap.app.MyWebServiceHelper;  public class UpAndDownPicFileActivity extends Activity {   ImageView imageView;   public static final String filename = "xfire.png";   public static final String fileDir = "/sdcard/xmlfile/";   public MyWebServiceHelper myWebServiceHelper = new MyWebServiceHelper();   @Override   protected void onCreate(Bundle savedInstanceState) {    // TODO Auto-generated method stub    super.onCreate(savedInstanceState);    setContentView(R.layout.upanddownpic);    imageView = (ImageView) this.findViewById(R.id.imageView1);    // Bitmap    // bitmap=BitmapFactory.decodeFile("/sdcard/xmlfile/"+"xfire.png");    // imageView.setImageBitmap(bitmap);    Button downButton = (Button) findViewById(R.id.downbutton);    downButton.setOnClickListener(new OnClickListener() {     @Override     public void onClick(View v) {      // TODO Auto-generated method stub      myWebServiceHelper.getTranferFileString(filename);      // 收到服务器端发送过来的图片，然后显现在图片框中      Bitmap bitmap = BitmapFactory.decodeFile(fileDir + filename);      imageView.setImageBitmap(bitmap);     }    });    Button upButton = (Button) findViewById(R.id.upbutton);    upButton.setOnClickListener(new OnClickListener() {     @Override     public void onClick(View v) {      // TODO Auto-generated method stub      String fileContent = "";      FileOperate.OpenOrCreateFile(filename);      fileContent = FileOperate.bin2XmlString(fileDir+filename);           // Toast.makeText(UpAndDownPicFileActivity.this, fileContent, Toast.LENGTH_LONG).show();      String result=myWebServiceHelper.upToServerOfFileStringWithEncode(filename,        fileContent);            try {       Thread.currentThread().sleep(2000);      } catch (InterruptedException e) {       // TODO Auto-generated catch block       e.printStackTrace();      }            Toast.makeText(UpAndDownPicFileActivity.this, result, Toast.LENGTH_LONG).show();      // 收到服务器端发送过来的图片，然后显现在图片框中      //imageView.setImageBitmap(null);     }    });   }  }

分别实现了远程上传和下载图片的功能。它的处理类集中在MyWebServiceHelper，它实现了远程获取和上传的细节功能。

这个功能都是通过KSOAP框架实现的。下面贴上它的代码，如下所示：

 // WSDL文档中的命名空间   private static final String targetNameSpace = "http://android.googlepages.com/";      // WSDL文档中的URL   private static final String WSDL = "http://10.10.178.71:8888/WSDLApp/services/MyService";   // 需要调用的方法名(获得Myervices中的helloWorld方法)   private static final String getHelloworld = "helloWorld";      //需要调用的方法名(获得Myervices中的login方法)   private static final String getLogin="login";      //获取加密图片的字符串   private static final String getTranferFileStringWithEncode="tranferFileStringWithEncode";      //获取加密图片的字符串   private static final String upToServerOfFileContent="fetchFileStringWithEncode";   public String  getTranferFileString(String filename) {    String fileContent = "";    SoapObject soapObject = new SoapObject(targetNameSpace,getTranferFileStringWithEncode);        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);    envelope.dotNet = false;    envelope.setOutputSoapObject(soapObject);    HttpTransportSE httpTranstation=new HttpTransportSE(WSDL);        try {     httpTranstation.call(targetNameSpace + getTranferFileStringWithEncode, envelope);     SoapObject  result = (SoapObject ) envelope.bodyIn;//getResponse();          fileContent=(String) result.getProperty(0).toString();               //String strFile="downfromserive"+Math.random()+".png";            FileOperate.OpenOrCreateFile(filename);          FileOperate.xmlString2Bin(fileContent, new File(filename));            //  也可以通过下面方式获得str      //  SoapPrimitive  result = (SoapPrimitive ) envelope.getResponse();        // str=result.toString();       //   直指value字符串值    } catch (IOException e) {     // TODO Auto-generated catch block     e.printStackTrace();    } catch (XmlPullParserException e) {     // TODO Auto-generated catch block     e.printStackTrace();    }    return fileContent;   }         public String  upToServerOfFileStringWithEncode(String filename,String fileContent) {    String str = "";    SoapObject soapObject = new SoapObject(targetNameSpace,upToServerOfFileContent);        soapObject.addProperty("filename", filename);    soapObject.addProperty("fileContent", fileContent);       SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);    envelope.dotNet = false;    envelope.setOutputSoapObject(soapObject);    HttpTransportSE httpTranstation=new HttpTransportSE(WSDL);        try {     httpTranstation.call(targetNameSpace + upToServerOfFileContent, envelope);     SoapObject  result = (SoapObject ) envelope.bodyIn;//getResponse();          str=(String) result.getProperty(0).toString();     //返回上传成功0,1标志位         } catch (IOException e) {     // TODO Auto-generated catch block     e.printStackTrace();     return e.getMessage();    } catch (XmlPullParserException e) {     // TODO Auto-generated catch block     e.printStackTrace();     return e.getMessage();    }    return str;   }

在第二个函数中有：

 SoapObject soapObject = new SoapObject(targetNameSpace,upToServerOfFileContent);        soapObject.addProperty("filename", filename);    soapObject.addProperty("fileContent", fileContent);

这个是android客户端传送服务器端的参数参数。

而里面有个FileOperate.java类，这个类负责对文件操作。我封装在这个类中，方便集中处理以及调用。

下面贴上代码。如下所示：

package com.base.file.util;  import java.io.File;  import java.io.FileInputStream;  import java.io.FileOutputStream;  import java.io.IOException;  import com.base.encry.decry.app.Base64;  public class FileOperate {         //在SD卡中创建文件   public static void OpenOrCreateFile(String filename){    // 获取扩展SD卡设备状态    String sDStateString = android.os.Environment      .getExternalStorageState();    if (sDStateString.equals(android.os.Environment.MEDIA_MOUNTED)) {     // String strFile="downfromserive"+Math.random()+".png";     // 获取扩展存储设备的文件目录     File SDFile = android.os.Environment       .getExternalStorageDirectory();     File destDir = new File("/sdcard/xmlfile");     // File destDir = new File(SDFile.getAbsolutePath() +     // destDirStr);     if (!destDir.exists())      destDir.mkdir();     // Toast.makeText(SDCardTest., text, duration)     // 打开文件     File myFile = new File(destDir + File.separator + filename);          // 判断是否存在,不存在则创建     if (!myFile.exists()) {      try {       myFile.createNewFile();      } catch (IOException e) {       // TODO Auto-generated catch block       e.printStackTrace();      }     }    }   }         //删除指定文件，比如临时文件   public static void removeFile(String filename){    if(new File(filename).exists())     new File(filename).delete();   }      //解密，并将内容写入至指定文件中   public static boolean xmlString2Bin(String base64String, File file) {    byte[] data;    FileOutputStream output = null;    boolean ret = false;    try {     data = Base64.decode(base64String);     output = new FileOutputStream(file);     output.write(data);     output.close();     ret = true;    } catch (Exception e) {     e.printStackTrace();    }    return ret;   }         //将文件内容加密   public static String bin2XmlString(String filename) {    byte[] data = null;    FileInputStream input = null;    String ret = null;    int n;    try {     data = new byte[(int) new File(filename).length()];     input = new FileInputStream(new File(filename));          n = input.read(data);//这个就是一个文件读取过程。没有写while，一次性读完     input.close();     ret = new String(Base64.encode(data));    } catch (Exception e) {     e.printStackTrace();    }    return ret;   }  }

当然，我们还在看看这个Activity.java中的布局文件。

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:orientation="vertical" android:layout_width="fill_parent"   android:layout_height="fill_parent">   <TextView android:layout_width="fill_parent"    android:layout_height="wrap_content" android:text="@string/hello" />   <Button android:id="@+id/downbutton" android:layout_width="fill_parent"    android:layout_height="wrap_content" android:text="下载" />    <Button android:id="@+id/upbutton" android:layout_width="fill_parent"    android:layout_height="wrap_content" android:text="上传" />   <ImageView android:id="@+id/imageView1" android:layout_width="fill_parent"    android:layout_height="wrap_content" />  </LinearLayout>

而服务器端用的是XFire框架，这在之前的文章中讲过。不必多说。

看下面的代码：

在AccountImp.java中实现IAccount.java方法。

public String tranferFileStringWithEncode() {    // TODO Auto-generated method stub    return FileOperate.bin2XmlString("E://Workspaces//workspace//WSDLApp//"+"girl.png");   }   public String fetchFileStringWithEncode(String filename, String fileContent) {    // TODO Auto-generated method stub        //创建该新文件，并返回成功        try {          //打开并创建文件     FileOperate.OpenOrCreateFile(filename);          String pathFile="E://Workspaces//workspace//WSDLApp";     //解密，并将内容添加至该文件中     FileOperate.xmlString2Bin(fileContent, new File("E://Workspaces//workspace//WSDLApp//xfire.png"));          return "上传成功";    } catch (Exception e) {     // TODO: handle exception     return "上传失败";    }           }

IAccount.java

//将 POJO 发布成 Web 服务:有两种方法，接口和实现类是其中之一  public interface IAccount {   public int account(int x,int y);       public String helloWorld(String str);      //访问mysql数据库   public int login(String username,String password);         //传送图片字符串   public String tranferFileStringWithEncode();      //接收远程传送过来的图片字符串   public String fetchFileStringWithEncode(String username,String filename);        }

而这个XFIRE要在web.xml中注册.

<?xml version="1.0" encoding="UTF-8"?>  <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">    <servlet>      <servlet-name>XFireServlet</servlet-name>      <servlet-class>org.codehaus.xfire.transport.http.XFireConfigurableServlet</servlet-class>      <load-on-startup>0</load-on-startup>    </servlet>    <servlet-mapping>      <servlet-name>XFireServlet</servlet-name>      <url-pattern>/services/*</url-pattern>    </servlet-mapping>    <welcome-file-list>      <welcome-file>index.jsp</welcome-file>    </welcome-file-list>  </web-app>

这样Web服务就用去查找services目录下。所以还要在WebServices目录下（在该服务器端要目录下）创建

services.xml文件。如下所示：

<!-- 服务一:简单计算，直接输出 -->   <service>    <name>MyService</name>    <serviceClass>test.IAccount</serviceClass>    <implementationClass>test.AccountImp</implementationClass>    <mce:style><!--  wrapped  --></mce:style><style mce_bogus="1">wrapped</style>    <use>literal</use>    <scope>application</scope>    <namespace>http://android.googlepages.com/</namespace>   </service>

最终实现效果如下所示：

点击上传按钮

点击下载按钮
来自：http://blog.csdn.net/haha_mingg/article/details/6347588