在Android远程上传以及下载图片---XFire框架

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：

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