legado/app/src/main/res/layout/activity_rss_source.xml

<?xml version="1.0" encoding="utf-8"?>
<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">

    <io.legado.app.ui.widget.TitleBar
        android:id="@+id/title_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:contentInsetStartWithNavigation="0dp"
        app:contentLayout="@layout/view_search"
        app:displayHomeAsUp="true"
        app:title="@string/rss_source" />

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">

        <io.legado.app.ui.widget.recycler.scroller.FastScrollRecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />

    </FrameLayout>

    <io.legado.app.ui.widget.SelectActionBar
        android:id="@+id/select_action_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>