sheishuoAPP/app/res/layout/trade_list_fragment.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:background="@color/white"
    android:fitsSystemWindows="false"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">



        <LinearLayout
            android:id="@+id/trade_list_notifications_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            tools:layout_editor_absoluteX="8dp"
            tools:layout_editor_absoluteY="0dp" />

        <android.support.v7.widget.RecyclerView
            android:id="@+id/trade_list_recyclerview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:layout_editor_absoluteX="8dp"
            tools:layout_editor_absoluteY="8dp" />
    </LinearLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/trade_list_fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:src="@drawable/ico_trade_publish"
        app:layout_anchor="@id/trade_list_recyclerview"
        app:layout_anchorGravity="bottom|end" />
</android.support.design.widget.CoordinatorLayout>