ZBar Android scan local QR or bar code image

Question

I am trying to scan a local image through ZBar, but as ZBar don't give any documentation for Android but only give detailed documentation for iPhone I had customized camera test activity too much. But I didn't get any success.

In ZBar cameratest activity

PreviewCallback previewCb = new PreviewCallback() {
    public void onPreviewFrame(byte[] data, Camera camera) {
        Camera.Parameters parameters = camera.getParameters();
        Size size = parameters.getPreviewSize();

        Image barcode = new Image(size.width, size.height, "Y800");
        barcode.setData(data);

        int result = scanner.scanImage(barcode);

        if (result != 0) {
            previewing = false;
            mCamera.setPreviewCallback(null);
            mCamera.stopPreview();

            SymbolSet syms = scanner.getResults();
            for (Symbol sym : syms) {
                scanText.setText("barcode result " + sym.getData());
                barcodeScanned = true;
            }
        }
    }
};

I want to customize this code so that it uses a local image from the gallery and gives me the result. How do I customize this code for giving a local image from the gallery and scan that image?

Answer 1

Try this out:

Bitmap barcodeBmp = BitmapFactory.decodeResource(getResources(),
                                                 R.drawable.barcode);
int width = barcodeBmp.getWidth();
int height = barcodeBmp.getHeight();
int pixels = new int;
barcodeBmp.getPixels(pixels, 0, width, 0, 0, width, height);
Image barcode = new Image(width, height, "RGB4");
barcode.setData(pixels);
int result = scanner.scanImage(barcode.convert("Y800"));

Or using the API, refer to HOWTO: Scan images using the API.