Is there any way to get upload progress correctly with HttpUrlConncetion
android, httpclient, httpurlconnection, progress, upload
Solution
I found the explanation on developer document http://developer.android.com/reference/java/net/HttpURLConnection.html
To upload data to a web server, configure the connection for output using setDoOutput(true).
For best performance, you should call either setFixedLengthStreamingMode(int) when the body length is known in advance, or setChunkedStreamingMode(int) when it is not. Otherwise HttpURLConnection will be forced to buffer the complete request body in memory before it is transmitted, wasting (and possibly exhausting) heap and increasing latency.
Calling `setFixedLengthStreamingMode()` first fix my problem. But as mentioned by this post, there is a bug in android that makes `HttpURLConnection` caches all content even if `setFixedLengthStreamingMode()` has been called, which is not fixed until post-froyo. So i use HttpClient instead for pre-gingerbread.
Problem
Android Developers Blog recommend to use `HttpURLConnection` other than apache's `HttpClient` (http://android-developers.blogspot.com/2011/09/androids-http-clients.html). I take the advice and get problem in reporting file upload progress. my code to grab progress is like this： ``` try { out = conncetion.getOutputStream(); in = new BufferedInputStream(fin); byte[] buffer = new byte[MAX_BUFFER_SIZE]; int r; while ((r = in.read(buffer)) != -1) { out.write(buffer, 0, r); bytes += r; if (null != mListener) { long now = System.currentTimeMillis(); if (now - lastTime >= mListener.getProgressInterval()) { lastTime = now; if (!mListener.onProgress(bytes, mSize)) { break; } } } } out.flush(); } finally { closeSilently(in); closeSilently(out); } ``` this code excutes very fast for whatever file size, but the file is actually still uploading to the server util i get response from the server. it seems that `HttpURLConnection` caches all data in internal buffer when i call `out.write()`. So, how can i get the actual file upload progress? Seems like `httpclient` can do that, but `httpclient` is not prefered...any idea?