Open InputStream to view Androd Studio file

I am making an application to be able to see files in a pdf viewer or imageView depending on the type of file.

I get the files using the library jtds 1.3.0 from SQL Server 2012, from a field of type varbinary(max) that contains the binary file of a pdf or an image. A query returns the field I put in a variable of type InputStream .

What do I have to do to open the file in a pdf viewer or in an imageview?

This is my code (in kotlin):

        val pst = conexionDB2()!!.prepareStatement("SELECT * FROM tbOT_Archivos")
        val rs = pst.executeQuery()
        rs.next()
        val nombre = rs.getString("OTf_NombreArchivo")
        val rest = rs.getBinaryStream("OTf_Archivo")

The variable rest is of type InputStream .

The variable name has the name of the file, for example: file.pdf or image.png, so I know what type of file to send to the pdf viewer or the imageview.

All part of that I have a InputStream in a variable, what comes?