Viewing a local PDF file in Android Application

I am trying to create an app that will let you view a stored PDF, like a simple file reader.

I am using a Navigational Drawer Project Base and I cannot seem to get the PDF to open.

I stored a test PDF in assets/ and I have also tried in raw/. If I try it with assets/ it crashes whenever I try to open the PDF on the device, saying "Cannot display PDF (test.pdf cannot be opened).

I have tried a few ways to try and get this to work but none have prevailed, here is my code as of now:

public void onSectionAttached(int number){
    switch (number) {
        case 1:
            mTitle = getString(R.string.title_song);

            File pdfFile = new File("/assets/test.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);

            try
            {
                startActivity(intent);
            }
            catch(ActivityNotFoundException e)
            {
                Toast.makeText(MainActivity.this, "It didn't crash!", Toast.LENGTH_LONG).show();
            }



            break;

        case 2:
            mTitle = getString(R.string.title_artist);
            break;
    }


}