layout_main.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"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:fitsSystemWindows="true"
  android:orientation="vertical">

  <include layout="@layout/layout_toolbar" />

  <com.sothree.slidinguppanel.SlidingUpPanelLayout
    android:id="@+id/editor_panel"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="bottom"
    app:umanoAntiDragView="@id/card_panel"
    app:umanoPanelHeight="?actionBarSize"
    app:umanoScrollableView="@id/chatline_scroller"
    app:umanoShadowHeight="4dp">

    <fragment
      android:id="@+id/fragment_messages"
      android:name="de.kuschku.quasseldroid_ng.ui.chat.messages.MessageListFragment"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:layout="@layout/fragment_messages" />

    <include layout="@layout/layout_slider" />

  </com.sothree.slidinguppanel.SlidingUpPanelLayout>

</LinearLayout>