如何在android中使用Volley执行文件上传

Question

我想上传文件(图像，文档等)从我的android应用程序到我的服务器。我在我的应用程序中使用Volley库进行网络调用。

我使用以下代码上传文件，但它不执行任何操作。(最后显示截击超时错误)

public class MultipartRequest extends Request<String> {
    private MultipartEntity entity = new MultipartEntity();
    private static final String FILE_PART_NAME = "file";

    private final Response.Listener<String> mListener;
    private final File mFilePart;
    private  String mStringPart,accessToken;
    public MultipartRequest(String url, Response.ErrorListener errorListener, Response.Listener<String> listener, File file,String accessToken)
    {
        super(Method.POST, url, errorListener);
        mListener = listener;
        mFilePart = file;
        this.accessToken = accessToken;
        buildMultipartEntity();
    }
    private void buildMultipartEntity()
    {
        entity.addPart(FILE_PART_NAME, new FileBody(mFilePart));
        try
        {
            entity.addPart("Content-Disposition", new StringBody("form-data"));
            entity.addPart("dir_path", new StringBody("IzEzOjE3"));
        }
        catch (UnsupportedEncodingException e)
        {
            VolleyLog.e("UnsupportedEncodingException");
        }
    }
    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        Map<String, String> headers = super.getHeaders();
        if (headers == null
                || headers.equals(Collections.emptyMap())) {
            headers = new HashMap<String, String>();
        }
        headers.put("Content-Type", "multipart/form-data");
        headers.put("_pkta",accessToken);

        return headers;
    }
    @Override
    public String getBodyContentType()
    {
        return entity.getContentType().getValue();
    }
    @Override
    public byte[] getBody() throws AuthFailureError
    {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try
        {
            entity.writeTo(bos);
        }
        catch (IOException e)
        {
            VolleyLog.e("IOException writing to ByteArrayOutputStream");
        }
        return bos.toByteArray();
    }
    @Override
    protected Response<String> parseNetworkResponse(NetworkResponse response)
    {
        return Response.success("Uploaded", getCacheEntry());
    }
    @Override
    protected void deliverResponse(String response)
    {
        mListener.onResponse(response);
    }
}

请帮助我如何在android中实现文件上传(无论是通过volley或任何其他)

Answer 1

Try

public MultiPartRequest(String url, String filePath, Response.Listener<String> listener, Response.ErrorListener errorListener)
{
    super(Method.POST, url, errorListener);
    entity = new  MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
    file = new File(filePath);
    mListener = listener;
    buildMultipartEntity();
}

也，在我的情况下，我没有重写getHeaders，只是传递其他值与addPart，例如:

    entity.addPart("file", new FileBody(file, "image/jpeg")); // for image
    entity.addPart("id", new StringBody(userid));