zumo_2.0_android/app/src/main/res/layout/fragment_event_participation.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
  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">

  <LinearLayout
    android:id="@+id/layout_container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v7.widget.RecyclerView
      android:id="@+id/recycler_view_event_participation"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toEndOf="parent"
      app:layout_constraintStart_toStartOf="parent"
      app:layout_constraintTop_toTopOf="parent"/>
  </LinearLayout>
</android.support.v4.widget.NestedScrollView>