从android上传图片时django中的空请求.FILES

Question

我想将图片从Android应用上传到djnago。这是我上传图片的android代码：

public void upload(String filepath) throws IOException{
     HttpClient httpclient = new DefaultHttpClient();
     HttpPost httppost = new HttpPost(SoberRequest.UPLOAD_IMAGE_URL);
     File file = new File(filepath);
     MultipartEntityBuilder builder = MultipartEntityBuilder.create();        
     builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
     FileBody cbFile = new FileBody(file, "image/jpeg");
     builder.addPart("image", cbFile);
     HttpEntity mpEntity = builder.build();
     httppost.setEntity(mpEntity);
     httppost.setHeader("enctype", "multipart/form-data");
     HttpResponse response = httpclient.execute(httppost);
     HttpEntity entity = response.getEntity();
     ...
}

这是我获取和保存图片的django代码：

@csrf_exempt
def get_image(request):
    try:
        if request.method == "POST":
            destination_path = open("Images/filan.jpg", "wb+")
            print(request.FILES)
            image = request.FILES['image']
            destination_path.write(image)
            destination_path.close()
            json_data = {"status": SUCCESSFUL}
             return HttpResponse(json.dumps(json_data), mimetype=json_mimeType)
        else:
            json_data = {"status": ERROR}
            return HttpResponse(json.dumps(json_data), mimetype=json_mimeType)

当我打印request.FILES时，它是空的：。和django引发此MultiValueDictKeyError异常。有什么问题？感谢