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If I have a fragment object, is there a way I could get notified of the lifecycle methods of that fragment ?
One possible way to do this is to implement this mechanism in my fragment and the fragment notifies the listeners, but this requires boilerplate code which I need to add in all the methods of the fragment. Is there a support for this at the Android platform level ?
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onCreate is called on initial creation of the fragment. You do your non graphical initializations here. It finishes even before the layout is inflated and the fragment is visible. onCreateView is called to inflate the layout of the fragment i.e graphical initialization usually takes place here.
In fragments you can use getViewLifecycleOwner() method to get the lifeCycleOwner.
onCreate(): The onCreate() method in a Fragment is called after the Activity 's onAttachFragment() but before that Fragment 's onCreateView() . In this method, you can assign variables, get Intent extras, and anything else that doesn't involve the View hierarchy (i.e. non-graphical initialisations).
These include onCreate() , onStart() , onResume() , onPause() , onStop() , and onDestroy() . A fragment's view has a separate Lifecycle that is managed independently from that of the fragment's Lifecycle .
You can register a FragmentLifecycleCallbacks instance using supportFragmentManager.registerFragmentLifecycleCallbacks(callback). The callback exposes all lifecycle events of a fragment, and is active until the fragment is destroyed (in which case the callback is automatically unregistered for you).
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