You are passed the Activity that will host your fragment ![]() onAttach() :This method will be called first, even before onCreate(), letting us know that your fragment has been attached to an activity.Fragment LifecycleĪndroid fragment lifecycle is illustrated in below image.īelow are the methods of fragment lifecycle. The view is then inserted into the ViewGroup parent, and the fragment is alive. The fragment then creates its view and returns it to the activity. Then it gets a reference to the ViewGroup the fragment’s view will be rendered inside. The following diagram shows depicts what happens when a fragment is added to an activity:įirst the activity obtains a reference to the fragment. The fragment’s view is displayed inside this ViewGroup. A fragment is added to a ViewGroup inside the activity. It is this view which is eventually displayed inside the activity in which the fragment lives.īecause an android fragment is not a view, adding it to an activity looks somewhat different than adding a view (e.g. Instead, a fragment has a view inside it. ![]() A activity can contain any number of fragments.Īn Android fragment is not by itself a subclass of View which most other UI components are. A greatest advantage of fragments is that it simplifies the task of creating UI for multiple screen sizes. Fragment should be used within the Activity.
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