![]() Items. Build professional apps for the worlds most popular mobile platform using Android Studio and Kotlin. ![]() Items.add(new Movie("The Shawshank Redemption", 1994)) Public static List items = new ArrayList() However fragments are wired in to the Android API, from Hone圜omb, and up. You can achieve some of the same things using activities and layouts (for example by using includes). show details in activity or detail fragment, in dependency of screen orientation Fragments are Android's solution to creating reusable user interfaces.On a tablet the main activity contains both fragments in its layout, on a handheld it only contains the main fragment. In demo application I use one main activity and one detailed activity. In its onAttach() method it can check if the activity correctly implements this interface. This way you avoid that the fragment has any knowledge about the activity which uses it. In your activity’s XML layout file, add the NavHostFragment: Then, in your activity’s file, you can retrieve the NavController using the findNavController (viewId) method. This should be as follows: android:layoutwidth'matchparent' android:layoutheight'500dp'. To manage app navigation, integrate NavController and NavHostFragment into your activity or fragment. Fragment can fire listener events on an activity via an interface.įor this purpose a fragment should define an interface as an inner type and require that the activity, which uses it, must implement this interface. Add the following to your fragment RelativeLayout. Activity can call methods on a fragment instance. Activity can construct a fragment and set arguments. There are three ways a fragment and an activity can communicate: An activity can contain multiple fragments, organized differently. Basic fragment code in XML looks like: Or, you can use a. Every communication of the fragments should be done via the host activity. Working with Fragments in Android Specify the fragment directly in the main layout XML file. Step 1 Create a new project in Android Studio, go to File New. ![]() To increase reuse of fragments, they should not directly communicate with each other. Optional exercise: Use Swipe to refresh in your list fragment A layout file for a. This is not limited to tablets for example, you can use fragments also to support different layout for landscape and portrait orientation on a smartphone. Step 1: Create a New Project in Android Studio To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Introduction to fragments you can read here.įragments simplify the reuse of components in different layouts, e.g., you can build single-panel layouts for handsets (phones) and multi-pane layouts for tablets. A fragment encapsulates functionality so that it is easier to reuse within activities and layouts. How to create Master - Detail fragments in Android Android Ī fragment is an independent Android component which can be used by an activity.
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