onStart() : The onStart() method is called once the fragment gets visible.In this method you can instantiate objects which require a Context object At this point, view can be accessed with the findViewById() method. Activity and fragment instance have been created as well as the view hierarchy of the activity. onActivit圜reated() : The onActivit圜reated() is called after the onCreateView() method when the host activity is created.You can return null if the fragment does not provide a UI. To draw a UI for your fragment, you must return a View component from this method that is the root of your fragment’s layout. onCreateView() : The system calls this callback when it’s time for the fragment to draw its user interface for the first time.You should initialize essential components of the fragment that you want to retain when the fragment is paused or stopped, then resumed. onCreate() : The system calls this method when creating the fragment.Typically you get in this method a reference to the activity which uses the fragment for further initialization work. onAttach() : The fragment instance is associated with an activity instance.The fragment and the activity is not fully initialized.MVVM (Model View ViewModel) Architecture Pattern in AndroidĪndroid fragments have their own life cycle very similar to an android activity.Naming a thread and fetching name of current thread in Java.What does start() function do in multithreading in Java?.Java Concurrency – yield(), sleep() and join() Methods.Lifecycle and States of a Thread in Java.Check if Email Address is Valid or not in Java.How to open dialer in Android through Intent?.How to Send Data From One Activity to Second Activity in Android?.How to build a simple Calculator app using Android Studio?.Implicit and Explicit Intents in Android with Examples.
Android | Android Application File Structure.ISRO CS Syllabus for Scientist/Engineer Exam.
The next code is not the best solution (because don´t remove the old fragment instance in order to avoid memory leaks) but removes the old fragment from fragmentManger fragment list int index = fragmentManager.getFragments().indexOf(oldFragment) įragmentManager.getFragments().set(index, null) You can see the list byĪrrayList fragmentList = fragmentManager.getFragments() The instance remains in fragments list in fragment manager. If you use addToBackStack, this keeps a reference to instance fragment avoiding to Garbage Collector erase the instance. See this interesting article Memory leaks in Android?-?identify, treat and avoid
Probably you instance old fragment it is keeping a reference.
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