tidy up code to remove unecessary log tags and comments

remove fragments from backstack when user clicks onBackPressed

update code to check is media source is null in Detail Fragment

update application name

fix twopane layout for tablets

Fix audio playing on video when back button is pressed. Need to handle onPause and onStop correctly

Handle null pointer exception of mPlayerView in Detail Fragment to stop the app crashing. Checking for the link not being empty will be a good start

update exoplayer init to restore state from boolean variable

save exoplayer state in onsaveinstancestate for device rotation

find best practice approach to saveinstance state for fragments

put an ImageView in code (in adapter or in fragment) implement a logic to handle it: download image if thumbnailURL is not empty or display local image (or nothing) using Picasso

include imageview in item_list layout

update detail fragment xml to set an ImageView here because an image might be available in the json response.

update Main Activity logic to check for image and if exists display in imageview within RecyclerView

release exoplayer in onStop

rename app name and updating strings.xml file

fix StepsFragment IndexOutOfBoundsException

create MainActivity basic espresso test