steppolew.blogg.se - Nest frgament inside listview android studio

Receiving data from intents and passing data between fragments.įragments are content controllers and contain most views, layouts, and event logic including:.

Hiding and showing relevant fragments using the fragment manager.

Presenting navigational components such as the navigation drawer or the viewpager.

Navigation to other activities through intents.

Inside of an app which uses fragments extensively, we need to keep in mind that the role of an activity shifts.Īctivities are navigation controllers primarily responsible for: Within a fragment-heavy app, we need to remember to organize our code according to architectural best practices. Fragments enable both orientations to reuse shared elements while also having differences.

Screen Orientation - Often within apps, the portrait version of an activity has a substantially different layout from the landscape version.

Fragments enable device-specific activities to reuse shared elements while also having differences.

Tablet Support - Often within apps, the tablet version of an activity has a substantially different layout from the phone version which is different from the TV version.

For example, using the same list across different data sources within an app. Reusing View and Logic Components - Fragments enable re-use of parts of your screen including views and event logic over and over in different ways across many disparate activities.There are many use cases for fragments but the most common use cases include: Within a fragment-oriented architecture, activities become navigational containers that are primarily responsible for navigation to other activities, presenting fragments and passing data. Fragments are standalone components that can contain views, events and logic.Fragments encapsulate views and logic so that it is easier to reuse within activities.Using the support library, fragments are supported back to all relevant Android versions.A Fragment is a combination of an XML layout file and a java class much like an Activity.Here are the important things to understand about fragments: Fragments must be embedded in activities they cannot run independently of activities. A Fragment typically defines a part of a user interface.

A fragment is a reusable class implementing a portion of an activity.