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#Static testview android android#
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onDestroyView: The view and related resources created in onCreateView are removed from the activityвЂ™s view hierarchy and destroyed.This occurs either after the fragment is about to be removed or replaced or when the fragmentвЂ™s activity stops. onStop: The fragment is no longer visible.This occurs when either the fragment is about to be removed or replaced or when the fragmentвЂ™s activity pauses. onPause: The fragment is no longer interactable.A fragment resumes only after its activity resumes and often resumes immediately after the activity does.Д«ut wait, the fragment isnвЂ™t done! These lifecycle events happen when you remove a fragment: onResume: The fragment is visible and interactable.A fragment starts only after its activity starts and often starts immediately after its activity does. onActivitењњreated: The fragmentвЂ™s activity has finished its own onCreate event.onCreateView: A fragment creates its portion of the view hierarchy, which is added to its activityвЂ™s view hierarchy.onCreate: A new fragment instance initializes, which always happens after it attaches to the host.onAttach: The fragment attaches to its host activity.The following lifecycle events come into play when you add a fragment:

#Static testview android android#

HereвЂ™s a fragment lifecycle diagram from the official Android Developer documentation:

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You can also add code and behaviors to callbacks for these events as you would for an activity. For instance, an event happens when the fragment becomes visible and active, or when the fragment becomes unused and is removed. Like an activity, a fragment has a lifecycle with events that occur when the fragmentвЂ™s status changes. YouвЂ™ll see that itвЂ™s pretty quiet in there.Д«ut donвЂ™t worry! YouвЂ™ll fix thatвЂ¦soon! Android Fragment Lifecycle The MainActivity will host all of your wee fragments and DogListFragment contains code to display a list of dog breeds content so that you can focus on fragments.Д«uild and run the project. There are also some boilerplate layouts for your fragments, non-fragment code that youвЂ™ll need and a fragment class that youвЂ™ll use later to write your own.

YouвЂ™ll find some resource files: strings.xml, activity_main.xml, drawable and layout files. In the Welcome to Android Studio dialog, select Import project (Eclipse ADT, Gradle, etc.).Д¬heck out the project El Dogo app.

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Use the Download Materials button at the top or bottom of this tutorial to download and extract the Starter Project. Time to get started! Getting Started With Android Fragments If youвЂ™ve never used RecyclerView or need a refresher, you should also look at the Android RecyclerView Tutorial. This tutorial utilizes an Android RecyclerView. If youвЂ™re brand new to Android, you should work through both the Android Tutorial for Beginners and the Introduction to Activities first. Note: This tutorial assumes youвЂ™re comfortable the basics of Android programming and understand what the activity lifecycle means.

Add and replace fragments by using transactions.

Let your fragments send information to an activity.

Create and add fragments to an activity.

Through building this app youвЂ™ll learn how to: When the user selects a breed, the app displays information about it. In this tutorial, youвЂ™ll build a mini-encyclopedia of dogs which displays a list of dog breeds arranged in a grid.

Adaptability: Representing sections of a UI as different fragments and utilizing different layouts depending on screen orientation and size.

Reusability: Placing behavior or UI parts into fragments that multiple activities can share.

Modularity: Dividing complex activity code across fragments for better organization and maintenance.

However, if you use them well, they can provide:

In the same way that you donвЂ™t actually need an army of little helpers to do your bidding, you donвЂ™t have to use fragments. ThatвЂ™s kind of like the relationship between activities and fragments. You have a lot to do, so you might employ a few minions to run around and do your laundry and taxes in exchange for lodging and food. Imagine for a moment that youвЂ™re a super villain. In many ways, they have functionality similar to activities. As the name would suggest, fragments are not independent entities, but are tied to a single activity. Huyen Tue Dao wrote the original tutorial.ДЄ fragment is an Android component that holds part of the behavior and/or UI of an activity.

#Static testview android update#

Update note: Aaqib Hussain updated this tutorial for Kotlin and Android Studio 3.3.