Printing custom html from android app using PrinterShare

I am printing a custom html from my app using PrinterShare .

The reason why I'm using html is because, I'm changing the contents of the html by passing name value pairs through a query string. My html file is pretty simple and I have stored it under asset. When I try to access it as:

Intent i = new Intent(Intent.ACTION_VIEW);

i.setPackage("com.dynamixsoftware.printershare.amazon");

Uri printFileUri= Uri.parse("file:///android_asset/receipt-voucher.html?shopName=BTMShop&date=20/12/2007&serial=1121");

i.setDataAndType(printFileUri,"text/html");

startActivity(i);

The PrinterShare app is giving the web page unavailable error. So for testing purpose I created a text file under assest flder and tried to access it as-

Uri printFileUri= Uri.parse("file:///android_asset/test.txt");

and changed the data and type.

But even for the text file, I'm getting the error: No such file or directory from PrinterShare.

I have made the necessary additions in Manifest file.

Any idea?