The lifecycle makes it difficult to figure out what you should do with each callback. Steve Pomeroy made a diagram of the complete lifecycle, and it’s not pretty:Ĭreated by Steve Pomeroy, modified to remove the activity lifecycle, shared under the CC BY-SA 4.0 license. Fragments aren’t gods, but they make up for it by having extremely complex lifecycle. On Android, Context is a god object, and Activity is a context with extra lifecycle. What your parents never told you about fragments The lolcycle Since 2011, we’ve discovered better options for Square. Google recommended fragments, and we wanted to make our code standard.Because fragments are built on top of views and views can easily be animated, fragments would give us better control over screen transitions.it mirrors the behavior of the activity stack within a single activity). The fragment API provides backstack management, (i.e.Fragments are view controllers they hold decoupled chunks of business logic that can be tested.At this time, we did not yet support tablets - but knew we wanted to eventually.In 2011, we decided to use fragments for the following reasons: Recently I gave a tech talk at Droidcon Paris, where I explained the problems Square had with Android fragments and how others could avoid using any fragments.

Android studio fragment example