在Android中经过XFire WebService远程上传以及下载图片

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();
	@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);
			}
		});
	}
}

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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;
}

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?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 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;
	}
}

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?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。

?

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 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";
		}
	}

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?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);
}

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?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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