我落后于一位 Android 开发人员，他编写了此代码以将图像转换为 base 64 字符串并将其作为 IO.Stream 对象上传到我的 WCF 服务......
HttpPost post = new HttpPost(mUri);
if(mNameValuePairs != null){
// creating multipart entity for sending image files
MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
for(int index=0; index < mNameValuePairs.size(); index++) {
if(mNameValuePairs.get(index).getName().equalsIgnoreCase("strmImage")) {
// If the key equals to "_strmImage", use FileBody to transfer the data
/**
* to send image as multipart uncomment this line, currently not used
*/
// entity.addPart(mNameValuePairs.get(index).getName(), new FileBody(new File (mNameValuePairs.get(index).getValue())));
/**
* convert image into byte array
*/
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(mNameValuePairs.get(index).getValue(), options);
options.inSampleSize = MainActivity.calculateInSampleSize(options, //downsampling
300, 300);
options.inJustDecodeBounds = false;
Bitmap bitmap = BitmapFactory.decodeFile(mNameValuePairs.get(index).getValue(), options);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream); //compress to which format you want.
byte [] byte_arr = stream.toByteArray();
String image_str = Base64.encodeToString(byte_arr, Base64.DEFAULT); //converting to base 64 string
// making the json object and storing it in mPostdata
mPostdata = new JSONStringer().object()
.key("thisImage")
.object()
.key("UserID").value("163")
.key("UserDrugImageID").value("")
//.key("Filename").value(mNameValuePairs.get(index).getValue())
.key("Filename").value("test.jpg")
.key("SetID").value("2ebcbba3-36bb-49ec-8625-43d60fb730ee")
.key("strmImage").value(image_str)
.endObject().toString();
Log.e("", mPostdata);
/**
* to send image as String body uncomment this line, currently not used
*/
// entity.addPart(mNameValuePairs.get(index).getName(), new StringBody(image_str));
/**
* to send image as String body uncomment this line, currently not used
*/
// entity.addPart(mNameValuePairs.get(index).getName(), new ByteArrayBody(byte_arr, mNameValuePairs.get(index).getValue()));
} else {
// Normal string data
entity.addPart(mNameValuePairs.get(index).getName(), new StringBody(mNameValuePairs.get(index).getValue()));
}
}
/**
* setting multipart entity to httppost object, currently not used
*/
// post.setEntity(entity);
StringEntity se = new StringEntity(mPostdata);
se.setContentType("application/json;charset=UTF-8");//text/plain;charset=UTF-8
se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,"application/json;charset=UTF-8"));
post.setEntity(se);
/* post.setHeader("Accept", "application/json");
post.setHeader("Content-type", "application/json");*/
}
HttpResponse response = client.execute(post);
mServerResponse = EntityUtils.toString(response.getEntity());
我编写了 WCF REST 服务，包括这个接受复杂对象的方法：
<OperationContract()> _
<WebInvoke(Method:="POST", UriTemplate:="drugImage/add", RequestFormat:=WebMessageFormat.Json, responseformat:=WebMessageFormat.Json, BodyStyle:=WebMessageBodyStyle.Wrapped)> _
Function InsertUserDrugImage(ByVal thisImage As dcUserDrugImage) As dcOperationStatus
Public Function InsertUserDrugImage(ByVal thisImage As dcUserDrugImage) As dcOperationStatus Implements AndroidIService.InsertUserDrugImage
在调试期间，我看到这是我发送的对象：
{"thisImage":{"UserID":"163","UserDrugImageID":"","Filename":"test.jpg","SetID":"2ebcbba3-36bb-49ec-8625-43d60fb730ee","strmImage":"iVBORw0KGgoAAAANSUhEUgAAAUAAAADwCAIAAAD+Tyo8AAAAA3NCSVQICAjb4U\/gAAAKh0lEQVR4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\nDARGwEBgBAwE9j9cgtl23\/xr3AAAAABJRU5ErkJggg==\n"}
这是 dcUserDrugImage 的数据合同...
<Serializable()> _
<DataContract> _
Public Class dcUserDrugImage
Private _UserDrugImageID As String
Private _UserID As String
Private _SetID As String
Private _url As String
Private _Filename As String
Private _strmImage As Stream
<DataMember(IsRequired:=False)>
Public Property UserDrugImageID() As String
Get
Return _UserDrugImageID
End Get
Set(ByVal value As String)
_UserDrugImageID = value
End Set
End Property
<DataMember(IsRequired:=True)>
Public Property UserID() As String
Get
Return _UserID
End Get
Set(ByVal value As String)
_UserID = value
End Set
End Property
<DataMember(IsRequired:=True)>
Public Property SetID() As String
Get
Return _SetID
End Get
Set(ByVal value As String)
_SetID = value
End Set
End Property
<DataMember(IsRequired:=True)>
Public Property Filename() As String
Get
Return _Filename
End Get
Set(ByVal value As String)
_Filename = value
End Set
End Property
<DataMember(IsRequired:=False)>
Public Property url() As String
Get
Return _url
End Get
Set(ByVal value As String)
_url = value
End Set
End Property
<DataMember(IsRequired:=True)>
Public Property strmImage() As Stream
Get
Return _strmImage
End Get
Set(ByVal value As Stream)
_strmImage = value
End Set
End Property
Public Sub New()
End Sub
Public Sub New(ByVal thisDrugImage As UserDrugImage)
_UserDrugImageID = thisDrugImage.UserDrugImageID
_UserID = thisDrugImage.UserID
_SetID = thisDrugImage.SetID
_url = thisDrugImage.url
_Filename = thisDrugImage.ImageFileName
End Sub
Public Overrides Function ToString() As String
Dim sb As New StringBuilder
sb.Append("User ID: ")
If Not UserID = Nothing Then
sb.Append(UserID)
Else
sb.Append("null")
End If
sb.Append(", SetID: ")
If Not UserID = Nothing Then
sb.Append(SetID)
Else
sb.Append("null")
End If
sb.Append(", Filename: ")
If Not UserID = Nothing Then
sb.Append(Filename)
Else
sb.Append("null")
End If
sb.Append(", Size of Image Stream: ")
If Not strmImage Is Nothing Then
sb.Append(strmImage.Length.ToString)
Else
sb.Append("0")
End If
Return sb.ToString
End Function
End Class
<System.Runtime.Serialization.KnownType(GetType(dcUserDrugImage))> _
<CollectionDataContract()>
Public Class dcDrugImageCollection
Inherits List(Of dcUserDrugImage)
End Class
我现在得到的错误是：
The server encountered an error processing the request.
The exception message is 'Cannot create an abstract class.'.
See server logs for more details. The exception stack trace is: </p>
<p> at system.Runtime.Serialization.FormatterServices.nativeGetUninitializedObject(RuntimeType type)...
整天都在用头撞墙，尝试了 39485783475 种不同的东西，只是要休息一下，希望你们中的一个人能看到一些东西 :)