Why is the fragment not rendering the layout?

Question

Android

There is a layout described below. Used in a fragment.
The problem is that he completely refuses to show the bottom part (the one after the recyclerView).
The same markup was originally in the activity, everything worked fine there - the reason for replacing the layer, you need to see this lower “bar” when scrolling the list, but transferring the fragment to the markup, it was as if it was not there.

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="48dp"
        android:background="#F0F0F0"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:id="@+id/subheader"
        android:orientation="vertical"
        android:clickable="false"
        android:padding="16dp">

        <TextView

            android:paddingLeft="20dp"
            android:clickable="false"
            android:text="Очевидно длинный текст"
            android:textColor="#9e9e9e"
            android:textSize="14sp"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content" />

    </LinearLayout>


<android.support.v7.widget.RecyclerView
    android:id="@+id/rvWords"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    />



        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="56dp"
            android:layout_alignParentBottom="true"
            android:background="#757575"
            android:orientation="horizontal"
            android:paddingBottom="16dp"

            android:paddingLeft="64dp"
            android:paddingRight="64dp">

            <ImageButton
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="start|center"
                android:layout_marginLeft="25dp"
                android:background="@android:color/transparent"
                android:src="@drawable/filter"
                android:text="button 1" />

            <ImageButton
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:background="@android:color/transparent"
                android:src="@drawable/sort"
                android:text="button 2" />

            <ImageButton
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="end|center"
                android:layout_marginRight="25dp"
                android:background="@android:color/transparent"
                android:src="@drawable/suggest_term"
                android:text="button 3" />


        </FrameLayout>



</LinearLayout>

Answer 1

Horses mixed up, people!)
You're using a LinearLayout, but you want it to work like a RelativeLayout. In your markup, it is written that RecyclerView should occupy all the space on the screen: from the top panel to the very bottom, because of this, the bottom panel is not visible. Use a RelativeLayout as the root container and tell the RecyclerView to take up all the space from the top container to the bottom one (layout_below="top_panel_id" and layout_above="bottom_panel_id").