android上传图片使用MultipartEntity

Question

我正在尝试使用以下代码上传图片：

  HttpClient httpClient = new DefaultHttpClient();

            HttpPost httpPost = new HttpPost(
                    "http://konsole-data.de/uploadtest/upload.php");

            MultipartEntity multiPart = new MultipartEntity();
            multiPart.addPart("picture", new FileBody(new File(path)));

            httpPost.setEntity(multiPart);
            try {
                HttpResponse res = httpClient.execute(httpPost);

                            Toast.makeText(getApplicationContext(),res.toString(),
                        Toast.LENGTH_LONG).show();
            } catch (ClientProtocolException e) {

                e.printStackTrace();
            } catch (IOException e) {

                e.printStackTrace();
            }

path是一个标识图像的字符串，如/mnt/sdcard/DCIM/12712.jpg连接有效但是没有图像上传到服务器，你可以在这里看到一个调试文件：http://konsole-data.de/uploadtest/data/20121214-144802-.dbg
怎么了？

Answer 1

您应该指定HttpMultipartMode和文件的MIME类型（但我认为这不是必需的）：

MultipartEntity multipart = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);

FileBody bin = new FileBody(new File(path), "image/jpeg");
multipart.addPart("picture", bin);

修改

您还应该检查是否使用了正确的路径。而不是将File对象创建为匿名内部类：

File file = new File(path);
if(file.exists()){
    FileBody bin = new FileBody(file, "image/jpeg");
    multipart.addPart("picture", bin);
} else {
    Log.w(YourClass.class.getSimpleName(), "File " + path + " doesn't exist!");
}