path: root/app/src/main/res/layout/activity_inbox.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"
    tools:context=".activities.InboxActivity">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/appbar_layout_inbox_activity"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <com.google.android.material.appbar.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar_layout_inbox_activity"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_scrollFlags="scroll|enterAlways"
            app:titleEnabled="false"
            app:toolbarId="@+id/toolbar_inbox_activity">

            <androidx.appcompat.widget.Toolbar
                android:id="@+id/toolbar_inbox_activity"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:minHeight="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                app:layout_scrollFlags="scroll|enterAlways"
                app:popupTheme="@style/AppTheme.PopupOverlay"
                app:navigationIcon="?attr/homeAsUpIndicator" />

        </com.google.android.material.appbar.CollapsingToolbarLayout>

        <com.google.android.material.tabs.TabLayout
            android:id="@+id/tab_layout_inbox_activity"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            app:layout_scrollFlags="scroll|enterAlways"
            app:tabGravity="fill"
            app:tabIndicatorHeight="3dp"
            app:tabMode="fixed"
            app:tabRippleColor="?attr/colorControlHighlight"
            app:tabUnboundedRipple="false" />

    </com.google.android.material.appbar.AppBarLayout>

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/view_pager_inbox_activity"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab_inbox_activity"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/fab_margin"
        android:layout_gravity="bottom|end"
        android:contentDescription="@string/content_description_compose_message"
        app:srcCompat="@drawable/ic_add_day_night_24dp" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>