How to Print Images with a POS Printer

Preparing the Image

Location: Place the image in the 'assets' folder of your application project.

Image Specifications:

• Width: The width of the image should be 384 dots or less.
• Height: The height should be a multiple of 24 dots. If the height is not a multiple of 24, the excess will result in blank printing at the bottom of the image.

Printing the Image

Using the Print Image API: To print the image, call the print image API provided in the Java API. The necessary code snippet for this process is as follows:

    public void printBitmap(Map<String, Object> param, ActionCallback callback) {
        Bitmap bitmap =null;
        try {
            bitmap = BitmapFactory.decodeStream(mContext.getResources().getAssets()
                    .open("photo.bmp"));
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        try {
            device.printBitmap(bitmap);
            sendSuccessLog(mContext.getString(R.string.operation_succeed));
        } catch (DeviceException e) {
            e.printStackTrace();
            sendFailedLog(mContext.getString(R.string.operation_failed));
        }
    }