Android图片上传到upload.im API

private void uploadIm() {
        MultipartEntity multipartEntity = new MultipartEntity();
        File image1 = new File(getFilesDir().getAbsolutePath()+"/finalImage.jpg");
        multipartEntity.addPart("upload", new FileBody(image1));
        HttpClient client = new DefaultHttpClient();
        HttpPost post = new HttpPost("http://uploads.im/api");
        post.setEntity(multipartEntity);
        HttpResponse response;
        try {
            response = client.execute(post);
            HttpEntity resEntity = response.getEntity();
            String response_str = EntityUtils.toString(resEntity);
            Log.e("response", response_str);
            Toast.makeText(getApplicationContext(), "done", Toast.LENGTH_LONG).show();
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }