android - 将图像从 Android 发送到 WCF

Question

这是我的安卓代码

    public class UploadImage extends AsyncTask<Uri, Void, String> {

    @Override
    protected String doInBackground(Uri... params) {
        Bitmap bitmap;
        if (params[0] != null) {
            try {
                bitmap = BitmapFactory.decodeStream(getActivity()
                        .getContentResolver().openInputStream(params[0]));
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                bitmap.compress(Bitmap.CompressFormat.JPEG, 10, out);
                DefaultHttpClient httpClient = new DefaultHttpClient();
                byte[] sendData = out.toByteArray();
                HttpPost httpPost = new HttpPost(URL + "/"
                        + METHODNAME_UPLOAD);
                httpPost.setHeader("Content-Type", "application/json");
                ByteArrayBody bab = new ByteArrayBody(sendData,
                        "mobile.png");
                MultipartEntity entity = new MultipartEntity(
                        HttpMultipartMode.BROWSER_COMPATIBLE);
                entity.addPart("image", bab);
                httpPost.setEntity(entity);
                HttpResponse response = httpClient.execute(httpPost);
                System.out.println(response.getStatusLine().getStatusCode());
//              if (response.getStatusLine().getStatusCode() != 200) {
//                  throw new RuntimeException(
//                          "Failed : HTTP error code : "
//                                  + response.getStatusLine()
//                                          .getStatusCode());
//              } else {
//                  System.out.println("Success");
//              }
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (ClientProtocolException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return null;
    }
}

这是我的WCF接口(interface)代码

[OperationContract]
[WebInvoke(UriTemplate = "", Method = "POST", BodyStyle = WebMessageBodyStyle.Bare, ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json)]
string UploadImage(Stream Image);

这是我的方法，

public string UploadImage(Stream Image)
{
    return "Success";
}

我收到状态代码 415(不支持的媒体类型)

我在谷歌搜索了很多。任何帮助将不胜感激。也欢迎任何其他解决方案。我需要的是，我想使用 ImagePicker 选择一个图像并将其发送到 wcf 服务，我将从那里上传到服务器。

注意: 也欢迎其他解决方案

更新 1在@Vaishali 回答后，我更新了我的代码如下

bitmap = BitmapFactory.decodeStream(getActivity()
        .getContentResolver().openInputStream(params[0]));
byte[] sendData = getEncoded64ImageStringFromBitmap(bitmap);
ByteArrayBody bab = new ByteArrayBody(sendData,
        "mobile.png");
MultipartEntity entity = new MultipartEntity(
        HttpMultipartMode.BROWSER_COMPATIBLE);
entity.addPart("mobile", bab);
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(URL + "/"
        + METHODNAME_UPLOAD);
httpPost.setHeader("Content-Type", "application/json");
HttpResponse response = httpClient.execute(httpPost);
System.out
        .println(response.getStatusLine().getStatusCode());

和

public byte[] getEncoded64ImageStringFromBitmap(Bitmap bitmap) {
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    bitmap.compress(CompressFormat.JPEG, 70, stream);
    byte[] byteFormat = stream.toByteArray();
    // get the base 64 string
    String imgString = Base64.encodeToString(byteFormat, Base64.NO_WRAP);

    return imgString.getBytes();
}

现在状态码是400

Answer 1

我认为 WCF 服务期望的数据(IO 流)与您发送的数据(字节数组)不匹配。

我的经验是流很难在 WCF 中正确处理，因此我建议更改您的主机端接口(interface)以期待一个字节数组，然后看看会发生什么。