Java 将图片上传到服务器

我正在使用以下代码：

它起作用了

我想知道我要发送的照片是几秒钟前用相机拍的。 所以我创建了一个简单的方法来拍照，然后在活动结果上显示：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == CAMERA_PIC_REQUEST) {
        //2
        Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
        //3
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        thumbnail.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
        //4
        File file = new File(Environment.getExternalStorageDirectory()+File.separator + "guasto.jpg");

        try {
            file.createNewFile();
            FileOutputStream fo = new FileOutputStream(file);
            //5
            fo.write(bytes.toByteArray());
            fo.close();

         uploadFile(uploadFilePath + "" + uploadFileName); //this should call the working method to upload the picture

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

问题是上载无法工作，并且在执行这行代码之前停止：

dos = new DataOutputStream(conn.getOutputStream());

我应该怎么做才能解决这个问题。。。？

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非常感谢

请尝试以下代码。创建一个异步任务并在doInBackground方法中添加代码。您将得到InputStream的对象作为回报

您应该使用多部分实体

        File file = new File(selectedImage);
        ContentBody cbFile = new FileBody(file, "image/*");
        MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
        reqEntity.addPart(RequestParams.POST, cbFile);
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost("http://yourwebserveraddress.com/apiname_or_whatever_path_it_is");

        httpPost.setEntity(reqEntity);

        HttpResponse httpResponse = httpClient.execute(httpPost);
        HttpEntity httpEntity = httpResponse.getEntity();
        InputStream is = httpEntity.getContent();

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其中selectedImage是图像的路径。

@Alex编辑了答案