MainActivity

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="start"
    tools:context=".MainActivity">

    <View
        android:id="@+id/circle_bg"
        android:background="@drawable/list_circle_background"
        android:layout_width="620dp"
        android:layout_marginStart="-300dp"
        android:layout_height="match_parent"/>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        tools:listitem="@layout/task_row" />

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:layout_width="56dp"
        android:layout_height="56dp"
        android:clickable="true"
        android:focusable="true"
        app:rippleColor="@color/white"
        android:src="@drawable/ic_play_arrow_white_24dp"
        app:fabCustomSize="56dp"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        app:layout_anchor="@id/circle_bg"
        app:layout_anchorGravity="center|end"
        />
</androidx.coordinatorlayout.widget.CoordinatorLayout>