andorid 平台调用Web Service ， 图片传输

今天学习了下android调用web service,进行图片传输

下面是代码详解：

onActivityResult 方法在图片剪裁完成之后调用：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode != RESULT_OK)
            return;
        switch (requestCode) {
            case PHOTO_PICKED_WITH_DATA: {// 调用Gallery返回的
                final Bitmap photo = data.getParcelableExtra("data");   //获取剪裁后的图片

                try{
                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
                    photo.compress(Bitmap.CompressFormat.PNG, 100, baos);
                    byte[] bytes =  baos.toByteArray(); //把图片变成byte数组

                    //下面的代码我也不太明白什么意思，好像在4.1主线程直接访问web service的时候会报异常 ，
                    //从Android 2.3开始提供了一个新的类StrictMode，可以帮助开发者改进他们的Android应用，
                    //StrictMode可以用于捕捉发生在应用程序主线程中耗时的磁盘、网络访问或函数调用，可以帮助开发者使其改进程序，
                    //使主线程处理UI和动画在磁盘读写和网络操作时变得更平滑，避免主线程被阻塞，导致ANR窗口的发生。 //http://www.cnblogs.com/zelos/archive/2011/02/27/1966403.html
                    //最后通过上面的url中的解决方案会编译报错，最后在网上找到了这个解决方案
                    Class<?> strictModeClass = Class.forName("android.os.StrictMode", true, Thread.currentThread()
                            .getContextClassLoader());

                    Class<?> threadPolicyClass = Class.forName("android.os.StrictMode$ThreadPolicy", true, Thread
                            .currentThread().getContextClassLoader());

                    Class<?> threadPolicyBuilderClass = Class.forName("android.os.StrictMode$ThreadPolicy$Builder", true,
                            Thread.currentThread().getContextClassLoader());

                    Method setThreadPolicyMethod = strictModeClass.getMethod("setThreadPolicy", threadPolicyClass);

                    Method detectAllMethod = threadPolicyBuilderClass.getMethod("detectAll");
                    Method penaltyMethod = threadPolicyBuilderClass.getMethod("penaltyLog");
                    Method buildMethod = threadPolicyBuilderClass.getMethod("build");

                    Constructor<?> threadPolicyBuilderConstructor = threadPolicyBuilderClass.getConstructor();
                    Object threadPolicyBuilderObject = threadPolicyBuilderConstructor.newInstance();

                    Object obj = detectAllMethod.invoke(threadPolicyBuilderObject);

                    obj = penaltyMethod.invoke(obj);
                    Object threadPolicyObject = buildMethod.invoke(obj);
                    setThreadPolicyMethod.invoke(strictModeClass, threadPolicyObject);
                    //------------

                    //把byte通过Base64变成字符串，通过web service 传送
                    String imgStream = Base64.encodeToString(bytes, 100);
                    CallWebService(imgStream);
                }
                catch(Exception ex)
                {
                    Log.e("error:", ex.toString());
                }
                ImageView img = (ImageView)findViewById(R.id.imgView);
                img.setImageBitmap(photo);

                System.out.println("set new photo");
                break;
            }
            case CAMERA_WITH_DATA: {// 照相机程序返回的,再次调用图片剪辑程序去修剪图片
                final Bitmap photo = data.getParcelableExtra("data");
                doCropPhoto(photo);
                break;
            }
        }
    }

下面是访问web service的代码：

    // 命名空间
    String nameSpace = "http://192.168.1.110:800/";
    // 调用的方法名称
    String methodName = "GetFile";
    // EndPoint
    String endPoint = "http://192.168.1.110:800/WebService1.asmx";
    // SOAP Action
    String soapAction = "http://192.168.1.110:800/GetFile"; 

    private void CallWebService(String imageStream) {
        try {
            // 通过soap访问web service
            SoapObject soapObject = new SoapObject(nameSpace, methodName);
            soapObject.addProperty("imgStream", imageStream); //设置参数

            SoapSerializationEnvelope envelope=new SoapSerializationEnvelope(SoapEnvelope.VER11); //构造SOAP协议的版本号，该版本号需要根据服务端WebService的版本号设置
            envelope.bodyOut = soapObject;//该属性的值是创建的SoapObject对象。
            envelope.dotNet = true;

            HttpTransportSE ht=new HttpTransportSE(endPoint);
            ht.debug = true;
            ht.call(soapAction, envelope); //第2个参数是创建的SoapSerializationEnvelope对象

            if(envelope.getResponse()!=null)
            {
                SoapObject soapResult =(SoapObject) envelope.getResponse(); //使用getResponse方法获得WebService方法的返回结果
                String result = soapResult.getProperty(0).toString();
　　　　　　　　　 Toast.makeText(getApplicationContext(), "img Name:"+result,
					     Toast.LENGTH_SHORT).show();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

上面的是 android客户端的代码，下面的是web service中的代码

 [WebService(Namespace = "http://192.168.1.110:800/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
    // [System.Web.Script.Services.ScriptService]
    public class WebService1 : System.Web.Services.WebService
    {
        [WebMethod]
        public string GetFile(string imgStream)
        {
            if (string.IsNullOrEmpty(imgStream))
            {
                return "false";
            }
            try
            {
                byte[] buffer = Convert.FromBase64String(imgStream);
                MemoryStream ms = new MemoryStream(buffer);
                string fileName = GenderImgFileName();
                System.Drawing.Image.FromStream(ms).Save(@"d:\" + fileName);
                return fileName;
            }
            catch (Exception)
            {
                return "false";
            }
        }

        private string GenderImgFileName()
        {
            return DateTime.Now.ToString("yyyy-MM-dd") + Guid.NewGuid() + ".jpg";
        }

上面的就完成了。

C#中byte[] 和 Base64 之间的转换：

{    
    string factString = "中华人民共和国";
    byte[] myByte;
    string Base64Str;
    //先把字符串按照utf-8的编码转换成byte[]
    Encoding myEncoding = Encoding.GetEncoding("utf-8");
    //myByte中获得这样的字节数组：228,184,173,229,141,142,228,186,186,230,176,145,229,133,177,229,146,140,229,155,189
    myByte = myEncoding.GetBytes(factString);
    //把byte[]转成base64编码,这个例子形成的base64编码的unicode等价字符串为:"5Lit5Y2O5Lq65rCR5YWx5ZKM5Zu9"
    Base64Str = Convert.ToBase64String(myByte);
    //再从base64编码转成byte[]，又恢复为字节数组：228,184,173,229,141,142,228,186,186,230,176,145,229,133,177,229,146,140,229,155,189
    myByte = Convert.FromBase64String(Base64Str);
    //用同一个Encoding对象把byte[]转成字符串："中华人民共和国"
    factString = myEncoding.GetString(myByte);
    Console.WriteLine(factString);
}
原文地址：http://www.cnblogs.com/chnking/archive/2007/08/12/852669.html

android中Bitmap,byte[] 和Drawable相关的转换：http://www.cnblogs.com/fighter/archive/2012/02/20/android-bitmap-drawable.html

final Bitmap photo = data.getParcelableExtra("data");  
                
                try{
                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
                    photo.compress(Bitmap.CompressFormat.PNG, 100, baos);
                    byte[] bytes =  baos.toByteArray();

Class<?> strictModeClass = Class.forName("android.os.StrictMode", true, Thread.currentThread()
                            .getContextClassLoader());

Class<?> threadPolicyClass = Class.forName("android.os.StrictMode$ThreadPolicy", true, Thread
                            .currentThread().getContextClassLoader());

Class<?> threadPolicyBuilderClass = Class.forName("android.os.StrictMode$ThreadPolicy$Builder", true,
                            Thread.currentThread().getContextClassLoader());

Method setThreadPolicyMethod = strictModeClass.getMethod("setThreadPolicy", threadPolicyClass);

Method detectAllMethod = threadPolicyBuilderClass.getMethod("detectAll");
                    Method penaltyMethod = threadPolicyBuilderClass.getMethod("penaltyLog");
                    Method buildMethod = threadPolicyBuilderClass.getMethod("build");

Constructor<?> threadPolicyBuilderConstructor = threadPolicyBuilderClass.getConstructor();
                    Object threadPolicyBuilderObject = threadPolicyBuilderConstructor.newInstance();

Object obj = detectAllMethod.invoke(threadPolicyBuilderObject);

obj = penaltyMethod.invoke(obj);
                    Object threadPolicyObject = buildMethod.invoke(obj);
                    setThreadPolicyMethod.invoke(strictModeClass, threadPolicyObject);
                    
                    String imgStream = Base64.encodeToString(bytes, 100);
                    CallWebService(imgStream);
                }
                catch(Exception ex)
                {
                    Log.e("error:", ex.toString());
                }
                ImageView img = (ImageView)findViewById(R.id.imgView);
                img.setImageBitmap(photo);