How to open a pdf stored either in res/raw or assets folder?

I'm going to show a pdf in my application, and the pdf has to be bundled with the application.

What is a good way to do this?

I have read that it might be possible to do this by adding the pdf file to a res/raw folder and read it from there, but i get project errors when i put the pdf file there.

So i tried to put the pdf file in the asset folder of the project, and it gave no errors.

This is how i've tried to show the pdf:

File pdfFile = new File("res/raw/file.pdf");
Uri path = Uri.fromFile(pdfFile);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(path, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

Any ideas or suggestions?

Thanks in advance