What is a ViewPager?

The ViewPager is the widget that allows the user to swipe left or right to see an entirely new screen. In a sense, it’s just a nicer way to show the user multiple tabs. It also has the ability to dynamically add and remove pages (or tabs) at anytime.

How do I use Kotlin ViewPager?

Step by Step Implementation

1. Step 1: Create a project with the Empty Activity. To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio.
2. Step 2: Working with the activity_main.xml file. Navigate to the app > res > layout > activity_main.

What is the difference between FragmentPagerAdapter and FragmentStatePagerAdapter?

As I explained FragmentPagerAdapter stores the whole fragment in memory, and could increase a memory overhead if a large amount of fragments are used in ViewPager. In contrary its sibling, FragmentStatePagerAdapter only stores the savedInstanceState of fragments, and destroys all the fragments when they lose focus.

How does a ViewPager work?

The idea is that ViewPager works with a PageAdapter to supply the Views that represent each page. The basic idea is that ViewPager keeps track of what page should be visible on the screen and then asks the PagerAdapter to get the View hierarchy that needs to be displayed.

When should I use ViewPager?

ViewPager in Android is a class that allows the user to flip left and right through pages of data. This class provides the functionality to flip pages in app. It is a widget found in the support library. To use it you’ll have to put the element inside your XML layout file that’ll contain multiple child views.

Is ViewPager deprecated?

Technically, ViewPager is not deprecated, but the two concrete PagerAdapter implementations — FragmentPagerAdapter and FragmentStatePagerAdapter — are deprecated. Ideally, switch to something else, such as ViewPager2 or the pager composable in Accompanist. This class is deprecated.

What is difference between ViewPager and ViewPager2?

ViewPager2 is an improved version of the ViewPager library that offers enhanced functionality and addresses common difficulties with using ViewPager . If your app already uses ViewPager , read this page to learn more about migrating to ViewPager2 .

What is PagerAdapter?

destroyItem(ViewGroup, int, Object) getCount() isViewFromObject(View, Object) ViewPager associates each page with a key Object instead of working with Views directly. This key is used to track and uniquely identify a given page independent of its position in the adapter.

When should I use FragmentPagerAdapter?

ViewPager Using Fragments in Android

1. FragmentStatePagerAdapter: Keeps in memory only the current fragment displayed on the screen. This is memory efficient and should be used in applications with dynamic fragments.
2. FragmentPagerAdapter: This adapter should be used when the number of fragments is fixed.

How do I stop ViewPager swipe?

To enable / disable the swiping, just overide two methods: onTouchEvent and onInterceptTouchEvent . Both will return “false” if the paging was disabled. You just need to call the setPagingEnabled method with false and users won’t be able to swipe to paginate.

Should I use ViewPager or ViewPager2?

How do I use ViewPager 2?

Let’s now see how to use ViewPager2 in our project

1. Step 1: Create a New Project. On the Welcome screen of Android Studio, click on Create New Project.
2. Step 2: Add Vector Assets to show on the screen.
3. Step 3: Go to activity_main.xml and add the ViewPager2 widget to it.

Where are the tabs located in view pager?

Tab layout are visible below toolbar with View pager, used to create swipeable views. Tabs are designed to work with fragments. Use them to swipe fragments in view pager. In this article, we are going to show you how to implement material design tabs in your android app.

How to create swipe views with tabs using viewpager?

To use ViewPager and tabs, you need to add a dependency on ViewPager and on Material Components to your project. To set up your layout with ViewPager, add the element to your XML layout. For example, if each page in the swipe view should consume the entire layout, then your layout should look like this:

How to create sliding tabs with viewpager Android?

Replace the ‘X’ with the latest version number; you can find that out with a simple google search (it’s usually the first link). Now before we get our hands dirty with the java code, let’s set up the screens that we will see on swiping and on clicking the tabs. We need to create something called fragments for that!

How to set the viewpager on the screen?

We find the view and set the adapter on the viewPager. We then find the tabLayout which allows us to switch between the screens on clicking the tab using the ‘findViewById ()’ method and we set the viewPager on the tabLayout.