RecordStore 和手机拍摄的照片

Question

When the user takes photos with his phone I want LWUIT to get a specific photo to add to a recordstore and later retrieve that photo. How to achieve that?

Answer 1

RMS is not good for storing the Photo's. Because RMS designed for small amount of storage. You can't handle huge amount of data. Better you can read from phone memory or memory card. Also how you can take the currently captured photo without your application?

Edit:

You can develop the application for taking the photo and store it in RMS(But not huge amount) or store it in server through calling web service .

Answer 2

Ok, I make the application starts the camera through a command:

mPlayer = Manager.createPlayer("capture://video");
mPlayer.realize();

mVideoControl = (VideoControl) mPlayer.getControl("VideoControl");

Canvas canvas = new CameraCanvas(this, mVideoControl);
canvas.addCommand(mBackCommand);
canvas.addCommand(mCaptureCommand);
canvas.setCommandListener(this);
mDisplay.setCurrent(canvas);
mPlayer.start();

In the actionPerformed of the mCaptureCommand command:

public void capture() {
        try {
            // Get the image.
            byte[] raw = mVideoControl.getSnapshot(null);
//                    "encoding=png&width=320&height=240");
            bytelen = raw.length;
            Image image = Image.createImage(raw, 0, raw.length);

            Image thumb = createThumbnail(image);

            // Place it in the main form.
            if (mMainForm.size() > 0 && mMainForm.get(0) instanceof StringItem) {
                mMainForm.delete(0);
            }
            mMainForm.append(thumb);

            // Flip back to the main form.
            mDisplay.setCurrent(mMainForm);

            // Shut down the player.
            mPlayer.close();
            mPlayer = null;
            mVideoControl = null;
        } catch (MediaException me) {
            handleException(me);
        }
    }

The code of createThumbnail:

private Image createThumbnail(Image image) {
        int sourceWidth = image.getWidth();
        int sourceHeight = image.getHeight();

        int thumbWidth = 64;
        int thumbHeight = -1;

        if (thumbHeight == -1) {
            thumbHeight = thumbWidth * sourceHeight / sourceWidth;
        }

        Image thumb = Image.createImage(thumbWidth, thumbHeight);
        Graphics g = thumb.getGraphics();

        for (int y = 0; y < thumbHeight; y++) {
            for (int x = 0; x < thumbWidth; x++) {
                g.setClip(x, y, 1, 1);
                int dx = x * sourceWidth / thumbWidth;
                int dy = y * sourceHeight / thumbHeight;
                g.drawImage(image, x - dx, y - dy, Graphics.LEFT | Graphics.TOP);
            }
        }
        Image immutableThumb = Image.createImage(thumb);
        return immutableThumb;
    }

Now I do not know where the Image is stored when calling the createThumbnail method, that is after calling Image.createImage: there are two createImage calls one in the capture() method and one in the createThumbnail() method. But my real problem is to know the location of the created image and how to associate it with a banking-client recordStore id.