mobilek...@googlemail.com wrote:
> Hi,
>
> I need to send a bitmap to a server. I've written some code, however,
> I got stuck on the part where I need to transform my bitmap into byte
> []. Here is my code:
>
> public void updateBitmap(Bitmap bm){
> URL url = null;
> HttpURLConnection conn = null;
> try {
> url = new URL("http://www.myurl.com?";);
> } catch (MalformedURLException e) {
> e.printStackTrace();
> }
> try {
> conn = (HttpURLConnection) url.openConnection();
> } catch (IOException e) {
> e.printStackTrace();
> }
> try {
> conn.setRequestMethod("POST");
> } catch (ProtocolException e) {
> e.printStackTrace();
> }
> conn.setDoOutput(true);
> conn.setDoInput(true);
> conn.addRequestProperty("user_id", user.getUsername());
> conn.addRequestProperty("pass", user.getPassword());
> conn.addRequestProperty("id", pinId);
>
> OutputStream os = null;
> try {
> os = conn.getOutputStream();
> } catch (IOException e) {
> e.printStackTrace();
> }
>
> // Encode bitmap and flush the os
>
> }
>
> Could you advice me on how to complete my code? Thank you.
>
I'm going to be tackling the same sort of problem in an app I'm working
on so I can't give you much advice. BUT, I can tell you that typically
with HTTP file transfers, you'll want to encode the file into base-64
format. Unfortunately, for whatever reason, Android does not include
that capability as far as I know. Oddly, there's a bit of code in the
Apache Commons/Jakarta project to do that, but it wasn't included in
Android with the other code borrowed from that project. So what I did is
download the following files from the Apache site (I grabbed them
directly out of the source repository browser at
http://svn.apache.org/viewvc/commons/proper/codec/trunk/src/java/org/apache/commons/codec/
) and create new packages within my app's project:
BinaryDecoder.java
BinaryEncoder.java
Decoder.java
DecoderException.java
Encoder.java
EncoderException.java
StringDecoder.java
StringEncoder.java
StringEncoderComparator.java
binary/Base64.java
binary/Base64InputStream.java
binary/Base64OutputStream.java
binary/BinaryCodec.java
binary/Hex.java
I needed to create two packages: org.apache.commons.codec and
org.apache.commons.codec.binary from those files; it should be easy
enough to guess which ones go where. :-) From that point, base-64
encoding or decoding is as simple as including the packages, and
calling Base64.encodeString() or Base64.decodeString(). There are
multiple encoding/decoding functions there to suit your needs.
Raymond
P.S. I'm hoping that Google or some coder will include these classes in
the Android sources in the future, which would make us using it like
this unnecessary. Time will tell...
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