Android: Gallery pointer/notification/tag

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http://stackoverflow.com – I apologize for the very vague title. I'm making a timeline progress bar with the gallery function. Meaning I'm displaying each frame of the video in the gallery and upon clicking an image the video plays from there. This all works fine! What I would like to do is implement a drop down pointers or notifications function to display the position of the video. Much like the result in this example question: SeekBar Thumb position issue. Obviously this is for an actual seekbar and not gallery. How would I go about implementing this? Would I be best to use toasts? or is there a method I can overr (HowTos)