Hi,
I am a newbie to Android development; and I want to upload an image
(NOT an image file on the device, but a frame from a camera preview)
to a web-server. I searched around and got a snippet of code that can
be used to upload a byte array. This is the code:
public void uploadImage(final byte[] data) {
// spawn off a new thread to do the image uploading
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
Log.d(TAG, "onRun:");
HttpURLConnection conn = null;
try {
serverURL = new URL(URL);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
Log.e(TAG, "Malformed URL!");
e.printStackTrace();
}
try {
// open up a connection with the server
conn = (HttpURLConnection)
serverURL.openConnection();
// set up the conection
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection",
"Keep-Alive");
// now transfer the byte-stream
DataOutputStream ostream = new
DataOutputStream(conn.getOutputStream());
ostream.write(data);
ostream.flush();
ostream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
Log.e(TAG, "No response from server!");
e.printStackTrace();
} finally {
conn.disconnect();
}
// wait for server response
try {
BufferedReader reader = new
BufferedReader(
new
InputStreamReader(conn.getInputStream())
);
String response;
while ((response = reader.readLine())
!= null ) {
Log.d("server response: ",
response);
}
reader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}).start();
}
First, is this code right, or am I missing something here?
Next, I want to know how can I simultaneously upload image AND
optional image tags to the server?
I got to the level that I need to send a multi-part request, but can't
seem to figure out the specifics. Can someone help me?
Also are there some 'best practices' to follow while doing this (like
for responsiveness, etc)?
Any help is much appreciated!
Thanks,
Amit
PS: Although this may be a little out-of-bounds for this forum, but
I'm also writing the server -- any help/ pointers on how to write it
to handle this POST request that the client sends? Got to write the
server in ASP.NET
Thanks again,
amit
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