BubbleTabs.Xamarin 3.0.0

Basic example:

XML: Style.xml

<resources>
    
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    </style>
</resources>

Main.xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.github.florent37.bubbletab.BubbleTab
        android:id="@+id/bubbleTab"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:clipToPadding="false"
        android:background="@android:color/white"
        android:elevation="10dp"
        app:bubbleTab_circleColor="@color/colorAccent"
        app:bubbleTab_circleRatio="1.25">
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="16dp"
            android:src="@drawable/icon1" />
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="16dp"
            android:src="@drawable/icon2" />
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:padding="16dp"
            android:src="@drawable/icon3" />
    </com.github.florent37.bubbletab.BubbleTab>

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
</LinearLayout>

bubblepage_tab.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.recyclerview.widget.RecyclerView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#e9eaed"
    android:orientation="vertical">
</androidx.recyclerview.widget.RecyclerView>

bubbletab_cell.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:layout_margin="5dp"
        app:cardElevation="2dp"/>

</FrameLayout>

C#:

public class MainActivity : AppCompatActivity
{
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);

        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.Main);
        BubbleTab bubbleTab= FindViewById<BubbleTab>(Resource.Id.bubbleTab);
        ViewPager2 viewPager= FindViewById<ViewPager2>(Resource.Id.viewPager);

        viewPager.Adapter = new FakeAdapter(this);

        bubbleTab.SetupWithViewPager(viewPager);
    }

    public class FakeAdapter : FragmentStateAdapter
    {
        public FakeAdapter(FragmentActivity fragmentActivity) : base(fragmentActivity) { }

        public override ItemCount => 5;

        public override Fragment CreateFragment(int p0)
        {
            switch (p0)
            {
                default:
                    return FakeFragment.NewInstance();
            }
        }
    }

    public class FakeFragment : Fragment
    {
        RecyclerView RecyclerView { get; set; }

        public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        {
            return inflater.Inflate(Resource.Layout.bubbletab_page, container, false);
        }

        public override void OnViewCreated(View view, Bundle savedInstanceState)
        {
            RecyclerView = view.FindViewById<RecyclerView>(Resource.Id.recyclerView);
            RecyclerView.SetLayoutManager(new GridLayoutManager(Context, 2));
            RecyclerView.SetAdapter(new RecyclerAdapter());
        }

        public static Fragment NewInstance()
        {
            return new FakeFragment();
        }
    }

    public class RecyclerAdapterViewHolder : RecyclerView.ViewHolder
    {
        public View Cell { get; set; }

        public RecyclerAdapterViewHolder(View c) : base(c)
        {
            Cell = c;
        }
    }
}