Send a image using streamconnection.

You can write a png to a stream thus:

javax.image.ImageIO.write(bufferedImage, "PNG", out);

Sorry that should have been

javax.imageio.ImageIO.write(bufferedImage, "PNG", out);

I am using the following code to send data through my bluetooth device:

OR_conn = (StreamConnection) Connector.open(OR_conn_string);
OR_output = new DataOutputStream(new BufferedOutputStream(OR_conn.openOutputStream()));
OR_output.writeInt() etc.

How should i integrate your code into mine???

And could you also give me some code about receiving the png data with DataInputStream

thanx.

The problem is that is don't do J2ME as i think i've said before, although if you can point me to online docs for the api you're using it's possible that i could help anyway, but not otherwise

Thanx very much for your offer, CEHJ. Really appreciate it. But i think and hope you
do not need to read any doc.

I have checked in j2me lib after reading your first anwser.
>>javax.imageio.ImageIO.write(bufferedImage, "PNG", out);
Obviously, javax.imageio.ImageIO is also supported in MIDP.

Since i use DataStreamOutput/Iput to send the data
>>OR_conn = (StreamConnection) Connector.open(OR_conn_string);
>>OR_output = new DataOutputStream(new BufferedOutputStream(OR_conn.openOutputStream()));

What i am trying to do is:
1. write BufferedImage into PNG format. [javax.imageio.ImageIO.write(bufferedImage, "PNG", out);]
2. send it with DataOutputStream;
....
3. receive with DataInputStream;
4. Decode Input with javax.imageio.ImageIO.read to BufferedImage again.

5. Do something on my mobile phone... ...

I think step 1-4 are not J2ME programming, though step 3 and 4 are executed
on my phone, but they are just standard java coding.

So i hope you could help me. Or am i missing something?

thanx again.

Well 1&2 and 3&4 can be collapsed into one operation. If you've got a DataOutputStream, you can let 'out' stand for that

you mean like that:

javax.imageio.ImageIO.write(bufferedImage, "PNG", OR_output);

and what code do i need for reading the stream on my phone?

>> you mean like that:

Yes. If you're not sending any other data, you can get rid of the DataOutputStream and just use the BufferedOutputStream

>>and what code do i need for reading the stream on my phone?

BufferedImage bi = javax.imageio.ImageIO.read(in);

(if it can use ImageIO)

ohhh sorry, i was wrong, midp does not support ImageIO.

But it could read a "PNG" byteArray and render it.

So with:

javax.imageio.ImageIO.write(bufferedImage, "PNG", OR_output);

am i sending a byte Array???

ohhh sorry, i was wrong, midp does not support ImageIO.

But it could read a "PNG" byteArray and render it.

So i could turn a image or bufferedimage into png and send it
using:

output.writeByte():

By using:

javax.imageio.ImageIO.write(bufferedImage, "PNG", OR_output);

am i sending a byte Array???

>>am i sending a byte Array???

Yes, encoded in PNG format

Could i simply using

for(int i=0; i<ByteArray_length; i++){
input.readByte()
}

to read this byte array?

But how could i know how long this Byte array is?

You'd read the stream to eof - perhaps into a ByteArrayOutputStream

could i somehow use
javax.imageio.ImageIO.write(bufferedImage, "PNG", ...

to save the the png FISRT into a ByteArray, and then

send it per DataOutputStream.writeByte()?

Then it is easier to read it as in my last post?

works out, thanx very much, CEHJ

:-)