This another attempt to post this with photos attached hope it works this time.I made an attachment to my phone holder from an old storage box - as shown in the photos.  The brown stuff that helps to grip - is window/door draught proofing.  The size of the added piece is 20cm X 11cm.  It acts as a sun shade for the android phone and holder for the tablet.  (I don't see the photos attaching from clicking - so will add again.

Twice as many photos is better than none