NewPipe/app/src/main/res/layout/activity_channel.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.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:fitsSystemWindows="true"
    android:id="@+id/rootView"
    tools:context="org.schabi.newpipe.ChannelActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/channel_app_bar"
        android:layout_width="match_parent"
        android:layout_height="@dimen/app_bar_height"
        android:fitsSystemWindows="true"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/channel_toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="@color/light_youtube_primary_color"
            app:statusBarScrim="@color/light_youtube_dark_color"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">


            <ImageView
                android:id="@+id/channel_banner_image"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                android:background="@color/light_youtube_dark_color"
                app:layout_collapseMode="parallax" />

            <ImageView
                android:id="@+id/channel_avatar_halo"
                android:visibility="gone"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="28dp"
                android:layout_marginStart="28dp"
                android:layout_marginTop="38dp"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:src="@drawable/white_circle"/>

            <de.hdodenhof.circleimageview.CircleImageView
                android:id="@+id/channel_avatar_view"
                android:visibility="gone"
                android:layout_width="@dimen/channel_avatar_size"
                android:layout_height="@dimen/channel_avatar_size"
                android:src="@drawable/buddy"
                android:layout_marginLeft="30dp"
                android:layout_marginStart="30dp"
                android:layout_marginTop="40dp"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"/>

            <android.support.v7.widget.Toolbar
                android:id="@+id/cannel_toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                app:popupTheme="@style/AppTheme.PopupOverlay" />

        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/channel_rss_fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/fab_margin"
        android:src="@drawable/ic_rss_feed_white_24dp"
        app:layout_anchor="@id/channel_app_bar"
        app:layout_anchorGravity="bottom|end" />

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/channel_loading">
        <ProgressBar android:id="@+id/progressBar"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:indeterminate="true"/>
    </RelativeLayout>

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="fill_vertical"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:id="@+id/channel_content_view"
        android:visibility="visible">

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/channel_streams_view">
        </LinearLayout>
    </android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>