leadtools.RasterException: Invalid parameter passed

Hello people
i am developing an android app and trying to convert a RasterImage to a Bitmap image so that i can draw a line on the bitmap image through canvas and set that bitmap to my RasterImageViewer. but i am getting this exception and my RasterImage is not being converted. below is my code can somebody pleaseeeee help me out.

Bitmap newpic;
newpic=RasterImageConverter.convertToBitmap(_loadedImage2, ConvertToImageOptions.NONE.getValue());
newpic = Bitmap.createBitmap(secondviewer.getWidth(), secondviewer.getHeight(), Config.ARGB_8888);
Canvas c = new Canvas(newpic);
c = new Canvas(newpic);
secondviewer.draw(c);
Paint p = new Paint();
p.setColor(color);
c.drawLine(x, y, xend, yend, p);
secondviewer.setImageBitmap(newpic);




here secondviewer is a RASTERIMAGEVIEWER and _loadedImage2 is a RASTERIMAGE. i have also attached the screenshot of exception

Hi,

The issue is with the second parameter in your convertToBitmap function call. You can simply pass null as the second parameter since you are attempting to use ConvertToImageOption.None anyway. I added some code to our ViewerDemo that demonstrates how to do what you are wanting to do (image is the RasterImage and mViewer is the RasterImageViewer):

Bitmap newpic = RasterImageConverter.convertToBitmap(image, null);

Canvas c = new Canvas(newpic);
Paint p = new Paint();
p.setColor(getResources().getColor(R.color.blue1));
c.drawLine(0, newpic.getHeight() / 2, newpic.getWidth(), newpic.getHeight() / 2, p);

mViewer.setImageBitmap(newpic);

This code takes in the RasterImage and converts it to a Bitmap, draws a horizontal blue line the width of the image half way down the image, then sets the Bitmap into the viewer.