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：
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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：
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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();@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.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() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubmyWebServiceHelper.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() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubString 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 blocke.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);}});}}?
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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：
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// WSDL文档中的命名空间private static final String targetNameSpace = "http://android.googlepages.com/";// WSDL文档中的URLprivate 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 blocke.printStackTrace();} catch (XmlPullParserException e) {// TODO Auto-generated catch blocke.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 blocke.printStackTrace();return e.getMessage();} catch (XmlPullParserException e) {// TODO Auto-generated catch blocke.printStackTrace();return e.getMessage();}return str;}?
?在第二个函数中有：
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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。
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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：
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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 blocke.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。
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<?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。
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看下面的代码：
在AccountImp.java中实现IAccount.java方法。
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public String tranferFileStringWithEncode() {// TODO Auto-generated method stubreturn 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 exceptionreturn "上传失败";}}?
?IAccount.java
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//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.
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<?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
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services.xml文件。如下所示：
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<!-- 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>
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?最终实现效果如下所示：
点击下载按钮
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