在Android中通過XFire WebService遠程上傳以及下載圖片

fmms 12年前發布 | 54K 次閱讀 Android Android開發移動開發

有時我們可以看到，圖片往往被提交到服務器端，這里我通過XFire框架來實現遠程上傳以及下載圖片的功能。

首先我們來看看從服務器端下載圖片的功能：

我用的是KSOAP框架，我之前的文章有講述過。在這里不要多說，貼上代碼。

首先我們看看Acitivity中的代碼：

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);
                // 收到服務器端發送過來的圖片，然后顯現在圖片框中
                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();
                // 收到服務器端發送過來的圖片，然后顯現在圖片框中
                //imageView.setImageBitmap(null);
            }
        });
    }
}

分別實現了遠程上傳和下載圖片的功能。它的處理類集中在MyWebServiceHelper，它實現了遠程獲取和上傳的細節功能。

這個功能都是通過KSOAP框架實現的。下面貼上它的代碼，如下所示：

 // WSDL文檔中的命名空間
    private static final String targetNameSpace = "http://android.googlepages.com/";

    // WSDL文檔中的URL
    private static final String WSDL = "http://10.10.178.71:8888/WSDLApp/services/MyService";
    // 需要調用的方法名(獲得Myervices中的helloWorld方法)
    private static final String getHelloworld = "helloWorld";

    //需要調用的方法名(獲得Myervices中的login方法)
    private static final String getLogin="login";

    //獲取加密圖片的字符串
    private static final String getTranferFileStringWithEncode="tranferFileStringWithEncode";

    //獲取加密圖片的字符串
    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));

              //  也可以通過下面方式獲得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();
            //返回上傳成功0,1標志位

        } 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;
    }

在第二個函數中有：

 SoapObject soapObject = new SoapObject(targetNameSpace,upToServerOfFileContent);

        soapObject.addProperty("filename", filename);
        soapObject.addProperty("fileContent", fileContent);

這個是android客戶端傳送服務器端的參數參數。

而里面有個FileOperate.java類，這個類負責對文件操作。我封裝在這個類中，方便集中處理以及調用。

下面貼上代碼。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卡中創建文件
    public static void OpenOrCreateFile(String filename){
        // 獲取擴展SD卡設備狀態
        String sDStateString = android.os.Environment
                .getExternalStorageState();
        if (sDStateString.equals(android.os.Environment.MEDIA_MOUNTED)) {
            // String strFile="downfromserive"+Math.random()+".png";
            // 獲取擴展存儲設備的文件目錄
            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)
            // 打開文件
            File myFile = new File(destDir + File.separator + filename);

            // 判斷是否存在,不存在則創建
            if (!myFile.exists()) {
                try {
                    myFile.createNewFile();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }


    //刪除指定文件，比如臨時文件
    public static void removeFile(String filename){
        if(new File(filename).exists())
            new File(filename).delete();
    }

    //解密，并將內容寫入至指定文件中
    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;
    }


    //將文件內容加密
    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);//這個就是一個文件讀取過程。沒有寫while，一次性讀完
            input.close();
            ret = new String(Base64.encode(data));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ret;
    }
}

當然，我們還在看看這個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="下載" />

<Button android:id="@+id/upbutton" android:layout_width="fill_parent"
        android:layout_height="wrap_content" android:text="上傳" />
    <ImageView android:id="@+id/imageView1" android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

而服務器端用的是XFire框架，這在之前的文章中講過。不必多說。

看下面的代碼：

在AccountImp.java中實現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

        //創建該新文件，并返回成功

        try {

            //打開并創建文件
            FileOperate.OpenOrCreateFile(filename);

            String pathFile="E://Workspaces//workspace//WSDLApp";
            //解密，并將內容添加至該文件中
            FileOperate.xmlString2Bin(fileContent, new File("E://Workspaces//workspace//WSDLApp//xfire.png"));

            return "上傳成功";
        } catch (Exception e) {
            // TODO: handle exception
            return "上傳失敗";
        }


    }

IAccount.java

//將 POJO 發布成 Web 服務:有兩種方法，接口和實現類是其中之一
public interface IAccount {
    public int account(int x,int y); 

    public String helloWorld(String str);

    //訪問mysql數據庫
    public int login(String username,String password);


    //傳送圖片字符串
    public String tranferFileStringWithEncode();

    //接收遠程傳送過來的圖片字符串
    public String fetchFileStringWithEncode(String username,String filename);


}

而這個XFIRE要在web.xml中注冊.

<?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>

這樣Web服務就用去查找services目錄下。所以還要在WebServices目錄下（在該服務器端要目錄下）創建

services.xml文件。如下所示：

<!-- 服務一:簡單計算，直接輸出 -->
    <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>

最終實現效果如下所示：

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