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

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
  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.support.v7.widget.RecyclerView
    android:id="@+id/recycler_view_my_event"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    app:layout_constraintBottom_toTopOf="@+id/button_ing_event"
    app:layout_constraintTop_toTopOf="parent"/>

  <android.support.constraint.ConstraintLayout
    android:id="@+id/button_ing_event"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/C000000"
    app:layout_constraintBottom_toBottomOf="parent">

    <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginTop="11dp"
      android:layout_marginBottom="11dp"
      android:gravity="center_horizontal"
      android:lineSpacingExtra="6sp"
      android:text="@string/event_ing"
      android:textColor="@color/CFFFFFF"
      android:textSize="16sp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toEndOf="parent"
      app:layout_constraintStart_toStartOf="parent"
      app:layout_constraintTop_toTopOf="parent"
      />

  </android.support.constraint.ConstraintLayout>

  <ImageView
    android:id="@+id/image_view_search_none"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="20dp"
    android:visibility="gone"
    app:layout_constraintBottom_toTopOf="@+id/textView8"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias=".35"
    app:layout_constraintVertical_chainStyle="packed"
    app:srcCompat="@drawable/ic_icon_search_none"
    tools:visibility="visible"/>

  <TextView
    android:id="@+id/textView8"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center_horizontal"
    android:lineSpacingExtra="6sp"
    android:text="@string/event_none"
    android:textColor="@color/CC5C5C5"
    android:textSize="14sp"
    android:visibility="gone"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/image_view_search_none"
    tools:visibility="visible"/>
</android.support.constraint.ConstraintLayout>