Here’s something handy I learned with Android the other day.
Lets say you have two activities. The first one, A, has a button that opens up the second activity, B. B, in turn has a button that returns the user to activity A. So, if you were to push the button in activity A, you would end up in activity B and vice versa. Pretty straight forward.
Now, lets say you just pushed the button in activity A, and ended up in activity B. You now want to go back to activity A. Pretty simple, just push the button in B, right? While if we push the button, we do in fact end up looking at activity A again, but it is not, in fact, the same instance of activity A that brought us to B in the first place.
