How to implement file upload progress bar in android

I am uploading files via org.apache.http.client.HttpClient in android and I need implement progress bar. Is it possible to grab progress from: ?

HttpPost httppost = new HttpPost("some path");
HttpClient httpclient = new DefaultHttpClient();
try {
File file = new File("file path");
InputStream in = new BufferedInputStream(new FileInputStream(file));
byte[] bArray = new byte[(int) file.length()];
in.read(b开发者_高级运维Array);
String entity = Base64.encodeToString(bArray, Base64.DEFAULT);
httppost.setEntity(new StringEntity(entity));
HttpResponse response = httpclient.execute(httppost);
}

If not, please show an alternative way. Thanks

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What you're going to want to do is create an AsyncTask that can handle this for you, overriding the onProgressUpdate method.

Here's a stripped down version of a something I tested in another app using HttpURLConnection. There may be some small redundancies and I think HttpURLConnection may be generally frowned upon, but this should work. Just use this class in whatever Activity class you're using (in this example, I refer to it as TheActivity) by calling new FileUploadTask().execute(). Of course you may need to tweak this to fit the needs of your app.

private class FileUploadTask extends AsyncTask<Object, Integer, Void> {

    private ProgressDialog dialog;

    @Override
    protected void onPreExecute() {
        dialog = new ProgressDialog(TheActivity.this);
        dialog.setMessage("Uploading...");
        dialog.setIndeterminate(false);
        dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        dialog.setProgress(0);
        dialog.show();
    }

    @Override
    protected Void doInBackground(Object... arg0) {
        try {
            File file = new File("file path");
            FileInputStream fileInputStream = new FileInputStream(file);
            byte[] bytes = new byte[(int) file.length()];
            fileInputStream.read(bytes);
            fileInputStream.close();

            URL url = new URL("some path");
            HttpURLConnection connection = 
                    (HttpURLConnection) url.openConnection();
            OutputStream outputStream = connection.getOutputStream();

            int bufferLength = 1024;
            for (int i = 0; i < bytes.length; i += bufferLength) {
                int progress = (int)((i / (float) bytes.length) * 100);
                publishProgress(progress);
                if (bytes.length - i >= bufferLength) {
                    outputStream.write(bytes, i, bufferLength);
                } else {
                    outputStream.write(bytes, i, bytes.length - i);
                }
            }
            publishProgress(100);

            outputStream.close();
            outputStream.flush();

            InputStream inputStream = connection.getInputStream();
            // read the response
            inputStream.close();

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onProgressUpdate(Integer... progress) {
        dialog.setProgress(progress[0]);
    }

    @Override
    protected void onPostExecute(Void result) {
        try {
            dialog.dismiss();
        } catch(Exception e) {
        }

    }

}

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I don't think HttpURLConnection simply does the trick, as @Basbous pointed out, the actual data is bufferred until outputStream.flush() is called. According to android issue 3164, it's now fixed in post-froyo platform (android 2.2, sdk version 8), you need use - java.net.HttpURLConnection.setFixedLengthStreamingMode to work around the buffer behavior.