android Detect which way user swipes finger over picture

Question

How can i detect which way i user swipes the picture if they swipe it right then (DO SOMETHING) if they swipe it left then (DO SOMETHING)

Answer 1

you can get the array of screen touch locations from event.getX(x) (for example event.getX(0) means latest motion event and getX(1) means previous to latest). In this you can apply a formula to detect in which side are you swiping.

For Right.. { if(event.getX(0)- event.getX(1) > 0) // You swiped to right } and similarly for left (i.e. xxxxxx < 0).