PreferenceFragment - Useful for creating settings activityįile: MainActivity.java package com.example.ListFragment - For displaying list of items.DialogFragment - For displaying the floating dialog.Get detached from an activity - onDetach()Īs a programmer, you should override various lifecycle callback methods, typically we implement onCreate(), onCreateView() and onPause() methods.View state restored - onViewStateRestored(Bundle).Activity creation - onActivit圜reated(Bundle).Create View - onCreateView(LayoutInflater, ViewGroup, Bundle).Get attached to activity - onAttach(Activity) Typically you implement the onCreateView() callback method, which the Android system calls when its time for the fragment to draw its layout.A fragment gets notified for following events. Just like an activities, fragments also have a lifecycle. When you add a fragment as a part of your activity layout, it lives in a ViewGroup inside the activity's view hierarchy and the fragment defines its own view layout. Fragments may also be called sub-activities. There can be more than one fragment in an activity. Usually each fragment represents a portion of a screen.
Understanding design paradigm of Fragmentsįragments were introduced for primarily supporting modular and flexible UI on large screen devices such as tablets.įragments are managed by an activity. They were introduced first in Android 3.0 (Honeycomb) API. Fragments are very important components of user interface in android apps.
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