Difference and uses of onCreate onCreateView and onActivityCreated in fragments

Question

What are the differences between onCreate    onCreateView    and onActivityCreated   in fragments and what would they each be used for

User · Answer

For anyone looking for a concise  pictorial answer    https   hanaskuliah wordpress com 2015 12 07 android-5-development-part-6-fragment     And

User · Answer

UPDATE  onActivityCreated   is deprecated from API Level 28   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   This is because this method can be called when the Activity s onCreate   is not finished  and so trying to access the View hierarchy here may result in a crash  onCreateView    After the onCreate   is called  in the Fragment   the Fragment s onCreateView   is called  You can assign your View variables and do any graphical initialisations  You are expected to return a View from this method  and this is the main UI view  but if your Fragment does not use any layouts or graphics  you can return null  happens by default if you don t override   onActivityCreated    As the name states  this is called after the Activity s onCreate   has completed  It is called after onCreateView    and is mainly used for final initialisations  for example  modifying UI elements   This is deprecated from API level 28   To sum up        they are all called in the Fragment but are called at different times  The onCreate   is called first  for doing any non-graphical initialisations  Next  you can assign and declare any View variables you want to use in onCreateView    Afterwards  use onActivityCreated   to do any final initialisations you want to do once everything has completed   If you want to view the official Android documentation  it can be found here   onCreate   onCreateView   onActivityCreated     There are also some slightly different  but less developed questions answers here on Stack Overflow   onCreate   vs onCreateView   onCreateView   vs onActivityCreated

User · Answer

onActivityCreated   - Deprecated  onActivityCreated   is now deprecated as Fragments Version 1 3 0-alpha02     The onActivityCreated   method is now deprecated  Code touching the   fragment s view should be done in onViewCreated    which is called   immediately before onActivityCreated    and other initialization code   should be in onCreate    To receive a callback specifically when the   activity s onCreate   is complete  a LifeCycleObserver should be   registered on the activity s Lifecycle in onAttach    and removed once   the onCreate   callback is received    Detailed information can be found here

[android] Difference and uses of onCreate(), onCreateView() and onActivityCreated() in fragments

Examples related to android

Examples related to android-fragments

Examples related to android-lifecycle

Examples related to oncreate

Examples related to fragment-lifecycle