In this example we create two Fragments and load them on the click of Button’s. FragmentTransaction: The class for performing an atomic set of Fragment operations such as Replace or Add a Fragment.īelow is the example of Fragment’s. FragmentManager: The class for interacting with Fragment objects inside an activityĤ. Fragment: The base class for all Fragment definitionsģ. FragmentActivity: The base class for all activities using compatibility based Fragment (and loader) features.Ģ. There are some primary classes related to Fragment’s are:ġ.
Implementation of Fragment In Android Require Honeycomb (3.0) or Later:įragments were added in in Honeycomb version of Android i.e API version 11. Passing the container is important in order for the system to apply layout parameters to the root view of the inflated layout, specified by the parent view in which it’s going and the third parameter is a boolean value indicating whether the inflated layout should be attached to the ViewGroup (the second parameter) during inflation. The inflate() method has three arguments first one is the resource layout which we want to inflate, second is the ViewGroup to be the parent of the inflated layout. The savedInstanceState parameter is a Bundle that provides data about the previous instance of the Fragment. Here the inflater parameter is a LayoutInflater used to inflate the layout, container parameter is the parent ViewGroup (from the activity’s layout) in which our Fragment layout will be inserted. Return inflater.inflate(R.agment_first, container, false) Public class FirstFragment extends Fragment View onCreateView(LayoutInflater inflater, ViewGroup container, While creating a Fragment we must use onCreateView() callback to define the layout and in order to run a Fragment. It provide flexibility and also removed the limitation of single Activity on the screen at a time.Ĭreate A Fragment Class In Android Studio:įor creating a Fragment firstly we extend the Fragment class, then override key lifecycle methods to insert our app logic, similar to the way we would with an Activity class. Fragments have their own events, layouts and complete life cycle. With the help of Fragment’s we can divide the screens in different parts and controls different parts separately.īy using Fragments we can comprise multiple Fragments in a single Activity. We can also combine multiple Fragments in a single activity to build a multi-plane UI.īefore the introduction of Fragment’s we can only show a single Activity on the screen at one given point of time so we were not able to divide the screen and control different parts separately. Fragment can be used in multiple activities.ĥ. Fragments has its own layout and its own behaviour with its own life cycle callbacks.Ĥ. For Example if we replace a Fragment and add it in back stack then on pressing the Back button on device it display the previous Fragment.ģ. back stack allow us to reverse a Fragment transaction on pressing Back button of device. While performing Fragment Transaction we can add a Fragment into back stack that’s managed by the Activity. We can manipulate each Fragment independently, such as add or remove them. We can create Fragments by extending Fragment class or by inserting a Fragment into our Activity layout by declaring the Fragment in the activity’s layout file, as a element. Important Related Read: Fragment Lifecycle We always need to embed Fragment in an activity and the fragment lifecycle is directly affected by the host activity’s lifecycle. We can combine multiple Fragments in Single Activity to build a multi panel UI and reuse a Fragment in multiple Activities.
It represents a behaviour or a portion of user interface in an Activity.
It will not be wrong if we say a fragment is a kind of sub-activity. In Android, Fragment is a part of an activity which enable more modular activity design. Fragment Tutorial With Example In Android Studio
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