Android Activities And Fragments


This lecture discusses Android Fragments. Fragments in Android A fragment is a portion of a User Interface in android. android:id can be used in to provide a specific identifier for the fragment. About the Example Fragment Application. I have Created One Fragment Activity which I want to call in tabbed Activity, I am new with Tabbed Activity so please Help, MainActivity. Following diagram sums this lifecycle This diagram presents different states in which an application can be and also methods called in Activity instance by OS when it passes from one state to another. Fire up Android Studio 1. Fragment Lifecycle. An activity may include multiple fragments for a certain configuration and for other configurations a different number. In this tutorial we are going to learn how to pass data between Fragments in an Activity class. The Activity class serves as the entry point for an app's interaction with the user, providing the window in which the app draws its UI. Android Studio can help with this task. Today, a lot of the bugs surrounding Fragment Transactions and Child Fragments have been fixed. With the release of Android 3. More than one fragment can be combined to represent a single user interface. The idea is basically to define an interface a given fragment with onAttach(Activity activity) and onDetach(), and let the activity implement that interface. 0, Google added support for larger displays and attention-grabbing UI designs and layouts. The lifecycle is a basic tenet of Android development. One of my favorite navigation pattern implementations is based on the "One-Activity-Multiple. Create an activity class in your project named HomeActivity. 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. A Fragment in Android is a component which can be used over an activity to define an independent modular UI component attached to the activity. A fragment is an Android component that holds part of the behavior and/or UI of an activity. I believe Android brings revolution in the field of mobile computing or mobile Application development as everyone know Android. In addition to activities, Android N also supports fragments, a feature that was introduced for tablets in Android 3. Layout that allows the user to swipe left and right through "pages" of content which are usually different fragments. Hello Guys, While using fragments in android most of the time we have to pass some parameters from activity to fragment. A Fragment represents a behavior or a portion of user interface in a FragmentActivity. Please try again later. March 21, 2018. A fragment that contains a YouTubePlayerView. Over the years, I've seen many different navigation pattern implementations in Android. This article explains the basics of Bottom Navigation, combining it with Fragments. Ask Question Asked 3 years ago. Because we will demo how to show multiple Fragments in one activity, so we need to use an android Tablet emulator. AddToBackStack() to add the existing transaction state to the stack. You will learn how to create maintain multiple fragments in one activity. • Fragments can help you adapt to different screen sizes and resolutions. A Fragment represents a behavior or a portion of user interface in an Activity. Over the years, I've seen many different navigation pattern implementations in Android. What is an Android Fragment? Well as the name suggests it just a piece of something and in case of android its a piece of an Activity. android:id provide an unique identification for each view in layout (So you can retrieve the references from your Java code such as Activities of Fragments) android:layout_width , android:layout_height define width and height (can be absolute or relative, but avoid when possible absolute values). Months ago I published an article related to Fragment State saving & restoring, Probably be the best way (?) to save/restore Android Fragment's state so far. You can notice bottom sheets in apps like map apps (bottom sheet reveals location, directions information), music players (Play bar sticks to bottom and opens when swipe up). 0, or Honeycomb, came with some fundamental user interface changes, most notably in the form of the Fragment API. In you Fragment define a variable that is the Activity that the fragment will be in then in the onCreateView connect the variable to the activity and then you have a reference that can get to any public variable in the main activity. findFragmentById(R. In this Android tip, I will show you how to send an intent from a fragment to an activity. Below diagram illustrates the relationship between activity and fragment life cycle. The other way to add a fragment to an activity is to use a view. Life cycle of a fragment enables you to properly save an instance of the fragment when it is destroyed and restore it to its previous. Let's take a look: Activity A. Communication Between Android Fragments And Activity. Finding Fragments can be performed by calling FindFragmentById() or FindFragmentByTag() methods of the FragmentManager. • A Fragment can be re-used in many Activities. A brief introduction to Android Fragments Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Here I am going to tell you about some of the main Android App Components like Activities, Fragments, and Intents. Activities and Fragments are the most critical parts of Android application. By default, Fragments are destroyed and recreated along with their parent Activitys when a configuration change occurs. In android, Fragments are the modular section of an activity design and these are used to represent the behaviour of user interface (UI) in an activity. Once added to the layout of an activity, fragments may be viewed and manipulated within the Android Studio Layout Editor tool. Sign in - Google Accounts. For example, the following method in the fragment is called when the user clicks on a list item. The Activity decides how best to display the Fragment's UI. In our activity class we add the onclick method. We're using Honeycomb (Android 3. Bundles are used in Intents, Activities and Fragments for transporting data. With Activity Fragment Manager it's easy to share elements between fragments or activities. Friday, March 25, 2016 Change or Replace Fragments Inside ViewPager. Fragment is a part of an activity, which contributes its own UI to that activity. Android back from a Child Activity started by a Fragment If you want to back from a child activity to Fragment put the following code in your Manifest File. Library to easily log out Android lifecycle methods for Activities and Fragments. Obtain the FragmentManager by calling getFragmentManager( ) in an Activity. A lot of valuable feed The Real Best Practices to Save/Restore Activity's and Fragment's state. Add a button in the layout to start the scan. This comes down to working out how to allow the Activity to communicate with the Fragment and vice versa. It is like window or frame of Java. Android is very stack-based regarding Activities. Android Activity Lifecycle is controlled by 7 methods of android. It can be freely positioined into your layout file. When you were reading the last tutorial on how to use fragments, you were probably thinking, "Wow, this is great, but I can't use any of this because I need to target more than. And since the introduction of Fragments, we've had to override onCreateView and use a layout inflater to get our view from a layout ID. Open the navigation file that we created bottom_navigation. FragmentTransation , which is managed by the FragmentManager. We also going to learn how to load the first fragment with grid data (using RecyclerView) by fetching JSON through HTTP call. Android Fragment is the part of activity, it is also known as sub-activity. In this Android tip, I will show you how to send an intent from a fragment to an activity. Activity class. Android comes with an activity stack and we don’t need to maintain the stack while opening or closing an activity. A fragment typically only takes up part of the screen. Demonstration of hiding and showing fragments. In our Trendyol. In android, Fragments are the modular section of an activity design and these are used to represent the behaviour of user interface (UI) in an activity. This FrameLayout is container for fragments. Like when an Activity is paused so is the fragment, when activity is destroyed so is the fragment but when the activity is resumed or running you can decide which fragments to add to activity and which to remove. Define an Interface. 8 ways to communicate between Fragment and Activity in Android apps. Usually you would keep the Fragment stupid and exposing events the activity displaying the fragment would react to. Communicating through Interfaces While interfaces have a wide array of functionality and purpose for many Java applications in multiple platforms and genres, one of the most common uses in Android development is creating communication channels between Fragments and Activities. If a detailed fragment is there, the main activity tells the fragment that it should update itself. Android Fragments Tutorial. Create a project in Android Studio by using the Empty Activity template. Open Do not keep activities in developer options and see what's the differences. We can combine multiple fragments in a single activity in order to build a multi-pane UI and reuse a fragment in multiple activities. The lifecycle methods of a Fragment are : onAttach(Activity): is called only once when it is attached with activity. With the release of Android 3. Skip navigation #3-Passing data from Activity to Fragment in android studio. The user interface for the first fragment will contain a toolbar of sorts consisting of an EditText view, a SeekBar and a Button, all contained within a RelativeLayout view. Activities and fragments are short-lived objects which are created and destroyed frequently as a user interacts with an app. Let’s modify our layout from the previous tutorial as below. Android TabLayout Example with examples of Activity and Intent, Fragments, Menu, Service, alarm manager, storage, sqlite, xml, json, multimedia, speech, web service. 0 introduced Fragments, showing how to support more flexible designs for the many different screen sizes found on phones and tablets. Android will automatically handle the stack and show you the top activity when you press the Back button. If you continue browsing the site, you agree to the use of cookies on this website. Need Of Fragments In Android: By using Fragments we can comprise multiple Fragments in a single Activity. Fragments added to the Android API in Android 3. As the name would suggest, fragments are not independent entities, but are tied to a single activity. Android Activity Lifecycle. And many others I am still using the Activity as only container sometimes, especially for the Camera case. To fragment or not to fragment We are working Android-Binding on supporting new features in Honeycomb and Ice-cream sandwich is underway. Android activity transition animation examples, applying fade in, fade out, rotate, scale, move, slide up, down, right and left, and bounce animations to activity transitions and shared element transition example. You will learn how to create maintain multiple fragments in one activity. onBackPressed() method. Android comes with an activity stack and we don't need to maintain the stack while opening or closing an activity. This has two parallel lifecycles (activities and fragments) which are organized vertically by time. You can play with "android:fitsSystemWindows =true/false" settings. Android applications, and also how to support Fragments on pre-Android 3. Simply stated and per the Android documentation, a FragmentManager manages the fragments in an Activity. A fragment on paper is supposed to be a self-contained widget you could plug anywhere and would provision for itself. Android devices exists in a variety of screen sizes and densities. If you have not done so already, please check out my previous post on dynamic layout design using weights and fragments that I wrote yesterday!. It's as if Android, the boss, has an agreement with members of the Activities Union. An instance of DialogFragment can be used to display an existing Dialog implementation dialog or a custom view hierarchy. Bottom Navigation should be used when the app has three to five top-level navigations. By the help of android startActivityForResult() method, we can send information from one activity to another and vice-versa. You can notice bottom sheets in apps like map apps (bottom sheet reveals location, directions information), music players (Play bar sticks to bottom and opens when swipe up). Bundle; Access View inside Fragment from Activity; Introducing Android Development with Ice Cream San. Months ago I published an article related to Fragment State saving & restoring, Probably be the best way (?) to save/restore Android Fragment’s state so far. If I have code in activity A to manage Fragment B (for a Tablet) why should I repeat the same code in Activity B for a phone? It seems that for a Phone I can still use 1 activity as well (only activity A) and replace fragments, this could reduce redundant code? Thanks. Android devices exists in a variety of screen sizes and densities. The toolbar bar (formerly known as action bar) is represented as of Android 5. In other words, it is responsible for creating a window to hold your UI components. Gradle - add the following line to your build. Next, you'll learn types of fragment transactions. The host activity can deliver messages to a fragment by capturing the Fragment instance with findFragmentById(), then directly call the fragment's public methods. What is Android Fragments. Android Studio can help with this task. An example of displaying movies in a Grid Fragment is explained. By using fragments we can create a flexible UI designs that can be adjusted based on the device screen size such as tablets, smartphones. To do this we just use the fragment tag. Mostly, fragments are used in navigation view to load different screens based on the user selection. Useful when you want to add native views on top of cordova webview. Android activity provide method to save / retrieve instance state data. Main Differences between [code ]Activity[/code] and [code ]Fragment[/code]: 1. Fragments – Add Fragments Dynamically At Runtime. its pretty easy to pass data between two fragments with the help of interface. How to pass data from Activity to Fragment. Finally we can proceed to MainActivity. It's a component that can be reused as many times as you want. In this first part, I provide information about the use of onSaveInstanceState( ) and onRestoreInstanceState( ) methods of the activity for saving and restoring state. gradle file: compile 'com. Intents are only usable for sending data on an Activity level. Android: Communication between an Activity and a Fragment i am beginner, trying to learn while doing, and the google results are too complicated for me at this point. Once you have defined these reusable Fragments, you can associate them with an Activity and…. This sounds very easy, and it probably is for someone with Android and/or Java experience, but for me it was a little challenging. In more recent builds (which did not make it by the ADT 11 cutoff date) this is even more automated, such that when you drop the tag, the warning dialog has a button to let you directly install the library and then it proceeds to the class chooser dialog. And many others I am still using the Activity as only container sometimes, especially for the Camera case. Because a tablet's screen is much larger than that of a handset, there's more room to combine and interchange UI components. I am creating Fragments with names MessageReceiver and MessageSender. Fragments lives in a ViewGroup insides the activity’s view hierarchy. The easiest way to communicate between your activity and fragments is using interfaces. For the purposes of this example, the fragments will be added to the activity using the element within this file. A Fragment is hosted inside an Activity (or a fragment). The Master/Detail flow is part of android design pattern which uses the screen size or orientation of a device to decide how a given data should be layout. Moreover Android documentation says: You can think of a fragment as a modular section of an activity, which has its own lifecycle, receives its own input events, and which you can add or remove while the activity is running (sort of like a "sub activity" that you can reuse in different activities). It’s as if Android, the boss, has an agreement with members of the Activities Union. It can be freely positioined into your layout file. It can be used with startActivity to launch an Activity, broadcastIntent to send. Android introduced fragments in Android 3. How to pass data between fragments? In this blog, I will pass data from Fragment 2 to Fragment 1 only. Android Adventures - Mastering Fragments & Dialogs. AddToBackStack() to add the existing transaction state to the stack. Ease communication between Activities, Fragments, Dialogs, Services, AsyncTaks, and Life Cycles of Anything by using event bus in Android. Android Authentication Activity with Fragments. Android Bottom Navigation View is another way to navigate through related pages in your android application. 例如,当activity接收到它的onCreate(),activity中的fragment接收到最多是onActivityCreated()。 一旦activity到达了resumed状态,你可以自由地在activity添加和移除fragment。因此,仅当activity处于resumed状态时, fragment的生命周期才可以独立变化。. ViewPager is one of the widgets of Android and it supports library "android. Android Fragments is a “reusable self contained portions of a user interface” in an Android Activity used for creating dynamic and flexible user interface. I have an…. and First, you'll learn how to add fragment to an activity and will also learn about fragment lifecycle. A: As Android developers, we have two main controller classes available to us: Activities and Fragments. Actually fragment used for make a user interface and contributes it's own layout of the activity. Note that it's guaranteed that the Activity's onCreate is executed before the Fragment's. The Basics of Android Fragments. Android fires activities in reverse order of seniority. MvvmCross can handle both scenarios smoothly. All of the logic for responding to user clicks and displaying the data will be contained in fragments. Both represent an application screen that user will see. How to pass data from Activity to Fragment. In this tutorial, we will learn about android viewPager using fragment in any android application. I have Created One Fragment Activity which I want to call in tabbed Activity, I am new with Tabbed Activity so please Help, MainActivity. So basically it is a heterogenous key/value map. In Android, a Fragment is a class which represents a " behavior or portion of user interface within an Activity. In this example it uses fragments. Android Studio provides a lot of help in creating Fragments and these are the tools you will be using in the future however to help understand Fragments it is a good idea to create one from scratch with only a little help from Android Studio. You can think of a fragment as a modular section… 平台 Android Studio Google Play Jetpack Kotlin 文档 新闻. It is a tricky problem and the solution is often just accepted without a deep understanding of the how and why. This is the easiest way, always following the best practises. Complete Android Fragment & Activity Lifecycle. We are very much aware of this functionality in android using java but what about kotlin. Android Activity Lifecycle is controlled by 7 methods of android. " Fragments were introduced to help produce UI which can adapt to various device orientations as well as function seamlessly across phones and tablets. I was asked one day, if we want to code two different screens, should we go for activity-activity or fragment-fragment? So I share my knowing … When Android was first made back in 2008, Activity. But in case if we don't want to use fragment or we want to add Navigation Drawer in already existing app which contain activities and we don't want to replace them with fragment. Welcome to: how to communicate between fragments and activities in your android applications. Using the Project tool window, navigate to the app -> res -> layout section of the FragmentExample project and double-click on the activity_fragment_example. A Fragment represents a behavior or a portion of user interface in an Activity. When a user interacts with an app on an Android device, they are almost always interacting with an Activity, a single, focused screen on the device. I would like to describe how I work with Bundles on Android and show you some good tips. The other way to add a fragment to an activity is to use a view. Ease communication between Activities, Fragments, Dialogs, Services, AsyncTaks, and Life Cycles of Anything by using event bus in Android. From a fragment or activity, you can call the _____ method to get a FragmentManager object that you can use to find and work with the fragments in your app. The Fragment class has code that looks a lot like an Activity. At run time, Android will determine what layout to load based on the orientation of the device and will provide that layout to the Activity to render. Single Activity can use multiple fragments and fragment usable in several activities. Sign in - Google Accounts. Android Fragment Usage in Android Application Development In this tutorial we are going to learn how to create android Fragment in Android Studio. 4 and create a new app. Demonstration of PreferenceFragment, showing a single fragment in an activity. Navigation means navigating in our application for example opening activities, displaying fragments all these are navigation. Once it has implemented that interface, you could do anything you want in the method it overrides. Fragments must be embedded with activities, they can not run independently. To achieve it, first we get the instance of FragmentTransaction using FragmentManager, then call replace method which will accept view container id and new fragment instance. how to detect Android Back button press on fragment. Android will automatically handle the stack and show you the top activity when you press the Back button. Fragments have their own events, layouts and complete life cycle. An activity can not be inserted into a view hierarchy; it must always be the root, and there is always exactly one active Activity at any given time. Android - Fragments. I believe Android brings revolution in the field of mobile computing or mobile Application development as everyone know Android. Android TabLayout Example using ViewPager and Fragments February 4, 2016 by Belal Khan 68 Comments If you are using the latest android application then you have noticed that now days android is following a design pattern. Everything is same except tabs will have listview inside it. Programmatically, this would be a fragment or activity that is declared using its respective XML tags. You can find more about fragments in android by clicking this. Use the LocationComponent to display a user's location on a map fragment. Not all Android developers have any experience of fragments, but this course will help you master fragments and services from scratch! In this course, you will start by getting familiar with the fundamental concepts of fragments and adding fragments to an activity, fragment transactions, their lifecycle, and how they communicate with activities. The easiest way to communicate between your activity and fragments is using interfaces. However; fragments are wired in to the Android API, from HoneyComb, and up. More information is available here in the Android Developer’s Guide. By using this ViewPresenter, you can decide whether to make all of your screens Activities, or to use an Activity host and many Fragments inside of it. In Kotlin, it's recommended you use one of the following extension functions, depending on whether you're calling the navigation command from within a fragment, activity or view: Fragment. To us, a Fragment can be thought of much like a sub-activity. * Activity is the base class of all the other activities, including AppCompatActivity. Prerequisite for this tutorial: You should be know how to make an Activity; And most importantly you should have prior Knowledge of Fragments. Earlier we had learn how to pass data from one activity to another and get back data from another activity. ViewPagers are used to swipe through pages of data. It’s generally used in conjunction with fragments. You can combine multiple fragments in a single activity to build a multi-pane UI and reuse a fragment in multiple activities. Suppose an Activity has a stack of 3 fragments. The user interface for the first fragment will contain a toolbar of sorts consisting of an EditText view, a SeekBar and a Button, all contained within a RelativeLayout view. In this chapter, you will practice working with Fragments and layouts. Hence, communication from Fragments to Activities is. Each item when clicked will switch the relevant fragment into the activity's container view. With it you can: Watch the lifecycle in logs. Because a tablet's screen is much larger than that of a handset, there's more room to combine and interchange UI components. Activities are one of the fundamental building blocks of apps on the Android platform. Android Fragment represents a behavior or a portion of the user interface in an Activity. After creating the fragments, create a ViewModel class. It is important to remember, though, that a fragment’s lifecycle is directly affected by its host activity’s lifecycle; i. Every activity has different…. The idea is basically to define an interface inside a given fragment A and let the activity implement that interface. The Android framework manages the lifecycles of UI controllers, such as activities and fragments. Let's be a Master of It. Android applications, and also how to support Fragments on pre-Android 3. So that all states are managing by call back methods in action. How to create a 3D Terrain with Google Maps and height maps in Photoshop - 3D Map Generator Terrain - Duration: 20:32. When a user interacts with an app on an Android device, they are almost always interacting with an Activity, a single, focused screen on the device. A fragment's UI is defined in an XML layout file. Il suffisait de mettre un layout particulier dans layout-small, layout-normal, layout-large, layout-xlarge, pour obtenir l'I. Fragments • Useful for large screen (like tablet) • or as navigation tools • Fragments are hosted inside an Activity • A fragment is ‘attached’ to a View • It must creates its view (from an XML file) • Fragments have their own lifecycle (which is more complex than the activity) • Can be added via XML file or programmatically. Android Fragment Usage in Android Application Development In this tutorial we are going to learn how to create android Fragment in Android Studio. AddToBackStack() to add the existing transaction state to the stack. These are distinct views that can contain entire layouts and that come with their own. Now the fragment can deliver messages to the activity by calling the onArticleSelected() method (or other methods in the interface) using the mCallback instance of the OnHeadlineSelectedListener interface. Android OS provide back stack function for Activity, it also provide back stack function for Fragment. After creating the fragments, create a ViewModel class. Since this tutorial also addresses a specific problem of Android Activity To Fragment Communication. You can use Android Switch Fragment Without Losing Ui State (Kotlin) example to replace loadFragment. Most of the fragments and their layout files have been defined for you. It’s generally used in conjunction with fragments. A brief introduction to Android Fragments Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. You create fragments by extending Fragment class and You can insert a fragment into your activity layout by declaring the fragment in the activity's layout file, as a element. First, an activity is created, then started. Over the years, I've seen many different navigation pattern implementations in Android. A fragment is associated with activity. Understanding Android lifecycles can be a challenge, but luckily, Steve Pomeroy is up to it. void: onLowMemory() void: onMultiWindowModeChanged(boolean isInMultiWindowMode) Called when the Fragment's activity changes from fullscreen mode to multi-window mode and visa-versa. You can think of a fragment as a modular section of an activity, which has its own lifecycle, receives its own input events, and which you can add or remove while the activity is running. LifecykleLog. About the Example Fragment Application. Lecture 17 Fragments: ViewPager. Android tutorial about adding Bottom Navigation to your app using Fragments. Fragments, on the other hand, operate under assumption that Android should be capable of destroying and re-creating the View hierarchy associated with a specific Fragment instance. 또한, FragmentActivity라는 클래스를 상속받는 것과 헛갈릴 수 있지만, FragmentActivity를 상속받는 것은 옛날 안드로이드 3. In Android, a Fragment is a class which represents a " behavior or portion of user interface within an Activity. In this Bottom Navigation Android Example we will learn how to add a Bottom Navigation View, how to switch fragments when the Navigation Menus are clicked. To create a blank Fragment, expand app > java in Project: Android view, select the folder containing the Java code for your app, and choose File > New > Fragment > Fragment (Blank). A fragment on paper is supposed to be a self-contained widget you could plug anywhere and would provision for itself. You can add or remove a fragment while the activity is running. Hello Guys, While using fragments in android most of the time we have to pass some parameters from activity to fragment. Shared Element Transitions In-Depth (part 3a) | Android Design Patterns. To fragment or not to fragment We are working Android-Binding on supporting new features in Honeycomb and Ice-cream sandwich is underway. Where as the complete screen with which user interacts is called as activity. In this tutorial we are going to learn how to pass data between Fragments in an Activity class. In Android, Navigation Drawer is a panel that displays App’s Navigation option from the left edge of the screen. Does that really come with so many. Today, a lot of the bugs surrounding Fragment Transactions and Child Fragments have been fixed. One common example of Dialog is Alert Dialog. In this course, Android Fundamentals: Fragments, you'll start with the most basic and fundamental concepts of fragments and progressively dive into deeper topics. by SJ · Published December 12, 2014 · Updated June 4, 2015 Real power of Fragments comes to the action when at the runtime your program decides which Fragment to display based on the screen orientation. Please read article Android Save Retrieve Activity Instance State Example to learn more. Define an Interface. Event bus is an implementation of publish/subscribe pattern which is a messaging system between a subscriber and a publisher. Introduction to Android development with Android Studio. Developers can combine one or more fragments to build a single activity or even reuse fragments across multiple activities. Fragments are a powerful feature of good Android UI that allow you to approach app design in a modular manner. Note that it's guaranteed that the Activity's onCreate is executed before the Fragment's. Because a tablet's screen is much larger than that of a handset, there's more room to combine and interchange UI components. by SJ · Published December 12, 2014 · Updated June 4, 2015 Real power of Fragments comes to the action when at the runtime your program decides which Fragment to display based on the screen orientation. In order to show the details in Fragment B, Activity B must open. You can add or remove a fragment while the activity is running. Welcome to: how to communicate between fragments and activities in your android applications. Fragments - Add Fragments Dynamically At Runtime. onActivityCreated()The onActivityCreated() is called after the onCreateView() method when the host activity is created. For Example you set a String with nothing in it and then in you SearchActivity with you Button you fill that string with a Name or something. Hence, communication from Fragments to Activities is. In this Android fragment tutorial, we will learn how to use fragments in Android with code. Bundle; Access View inside Fragment from Activity; Introducing Android Development with Ice Cream San. Remove the Floating Action Button (FAB) from your layout and Activity. getFragmentManager() Android calls the ____ method when it's time to display the layout for the fragment. Finding Fragments can be performed by calling FindFragmentById() or FindFragmentByTag() methods of the FragmentManager. This sounds very easy, and it probably is for someone with Android and/or Java experience, but for me it was a little challenging. ViewPagers are used to swipe through pages of data.