Qt-jambi-interest Archive, December 2006
How to convert java byte[] to a QByteArray without using String object ?
Message 1 in thread
Hello,
I start with a InputStream response (from web service) :
InputStream InputStream_ref = response.getInputStream();
byte[] data = new byte[InputStream_ref.available()];
InputStream_ref.read(data);
data contains a png image and I would like show it into QGraphicsPixmapItem
:
Create QByteArray, create QPixmap from QByteArray and set them into
QGraphicsPixmapItem.
Can I use QNativePointer ? How ? (casting fails from byte[] to
QNativePointer...)
Congratulation to the trolltech dev team for this fabulous set of tools,
thanks a lot!
FranÃois Weykmans
Message 2 in thread
FranÃois Weykmans wrote:
> byte[] data = new byte[InputStream_ref.available()];
> InputStream_ref.read(data);
>
> data contains a png image and I would like show it into
> QGraphicsPixmapItem :
>
> Create QByteArray, create QPixmap from QByteArray and set them into
> QGraphicsPixmapItem.
>
> Can I use QNativePointer ? How ? (casting fails from byte[] to
> QNativePointer...)
In the next release of Jambi, QByteArray will have a constructor that
takes an array of bytes directly, but in TP3 you will need to use
QNativePointer, yes. Here's some example code (data is your array of bytes):
QNativePointer np = new QNativePointer(QNativePointer.Type.Byte,
data.length);
for (int i=0; i<data.length; ++i) np.setByteAt(i, data[i]);
QByteArray baData = new QByteArray(np, data.length);
Hope this helps!
-- Eskil
