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

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
  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="@dimen/action_bar_height"
  android:background="@null">

  <android.support.constraint.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="@dimen/action_bar_height"
    >

    <android.support.constraint.Guideline
      android:id="@+id/guide_start"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:orientation="vertical"
      app:layout_constraintGuide_begin="7dp"/>

    <ImageView
      android:id="@+id/button_back"
      android:layout_width="36dp"
      android:layout_height="36dp"
      android:paddingStart="9dp"
      android:paddingTop="9dp"
      android:paddingEnd="9dp"
      android:paddingBottom="9dp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintStart_toStartOf="@id/guide_start"
      app:layout_constraintTop_toTopOf="parent"
      app:srcCompat="@drawable/icon_header_back"/>

    <ImageView
      android:id="@+id/button_home"
      android:layout_width="36dp"
      android:layout_height="36dp"
      android:paddingStart="9dp"
      android:paddingTop="9dp"
      android:paddingEnd="9dp"
      android:paddingBottom="9dp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintStart_toStartOf="@id/guide_start"
      app:layout_constraintTop_toTopOf="parent"
      app:srcCompat="@drawable/ic_icon_header_home"/>

    <ImageView
      android:id="@+id/button_notification"
      android:layout_width="36dp"
      android:layout_height="36dp"
      android:paddingStart="9dp"
      android:paddingTop="9dp"
      android:paddingEnd="9dp"
      android:paddingBottom="9dp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintStart_toEndOf="@+id/button_home"
      app:layout_constraintTop_toTopOf="parent"
      app:srcCompat="@drawable/ic_icon_header_notice"/>

    <ImageView
      android:id="@+id/button_setting"
      android:layout_width="36dp"
      android:layout_height="36dp"
      android:paddingStart="9dp"
      android:paddingTop="9dp"
      android:paddingEnd="9dp"
      android:paddingBottom="9dp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintStart_toEndOf="@+id/button_notification"
      app:layout_constraintTop_toTopOf="parent"
      app:srcCompat="@drawable/ic_icon_header_setting"/>

    <android.support.constraint.Guideline
      android:id="@+id/guide_start2"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:orientation="vertical"
      app:layout_constraintGuide_begin="33dp"/>

    <ImageView
      android:id="@+id/image_bi"
      android:layout_width="63dp"
      android:layout_height="15dp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintStart_toStartOf="@id/guide_start2"
      app:layout_constraintTop_toTopOf="parent"
      app:srcCompat="@drawable/ic_bi_header_black"/>

    <TextView
      android:id="@+id/action_bar_title"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:gravity="center"
      android:paddingTop="5dp"
      android:paddingBottom="5dp"
      android:textColor="@color/C000000"
      android:textSize="18sp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toStartOf="@+id/button_open_arrow"
      app:layout_constraintHorizontal_chainStyle="packed"
      app:layout_constraintStart_toStartOf="parent"
      app:layout_constraintTop_toTopOf="parent"
      tools:text="VVV"/>
    <!-- 타이틀 옆에 아이콘 자리 -->
    <ImageView
      android:id="@+id/button_open_arrow"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:paddingStart="3dp"
      android:paddingTop="13dp"
      android:paddingEnd="3dp"
      android:paddingBottom="8dp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toEndOf="parent"
      app:layout_constraintStart_toEndOf="@+id/action_bar_title"
      app:layout_constraintTop_toTopOf="parent"
      app:srcCompat="@drawable/icon_h_down"
      tools:visibility="visible"/>

    <TextView
      android:id="@+id/text_sub"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:gravity="end"
      android:paddingStart="9dp"
      android:paddingTop="9dp"
      android:paddingEnd="9dp"
      android:paddingBottom="9dp"
      android:textColor="#666666"
      android:textSize="12sp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toStartOf="@+id/button_search"
      app:layout_constraintTop_toTopOf="parent"
      tools:text="회원확인"
      />

    <android.support.constraint.Guideline
      android:id="@+id/guide_end2"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:orientation="vertical"
      app:layout_constraintGuide_end="36.5dp"/>

    <ImageView
      android:id="@+id/button_search"
      android:layout_width="36dp"
      android:layout_height="36dp"
      android:paddingStart="9dp"
      android:paddingTop="9dp"
      android:paddingEnd="9dp"
      android:paddingBottom="9dp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toStartOf="@+id/button_close"
      app:layout_constraintTop_toTopOf="parent"
      app:srcCompat="@drawable/ic_icon_header_search"/>

    <ImageView
      android:id="@+id/button_close"
      android:layout_width="36dp"
      android:layout_height="36dp"
      android:paddingStart="9dp"
      android:paddingTop="9dp"
      android:paddingEnd="9dp"
      android:paddingBottom="9dp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toStartOf="@+id/button_menu"
      app:layout_constraintTop_toTopOf="parent"
      app:srcCompat="@drawable/ic_icon_header_close"/>

    <ImageView
      android:id="@+id/button_menu"
      android:layout_width="36dp"
      android:layout_height="36dp"
      android:paddingStart="9dp"
      android:paddingTop="9dp"
      android:paddingEnd="9dp"
      android:paddingBottom="9dp"
      app:layout_constraintBottom_toBottomOf="parent"
      app:layout_constraintEnd_toEndOf="@+id/guide_end"
      app:layout_constraintTop_toTopOf="parent"
      app:srcCompat="@drawable/ic_icon_header_menu"/>

    <android.support.constraint.Guideline
      android:id="@+id/guide_end"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:orientation="vertical"
      app:layout_constraintGuide_end="7dp"/>

    <View
      android:id="@+id/view_underline"
      android:layout_width="match_parent"
      android:layout_height="1dp"
      android:background="@color/CE5E5E5"
      tools:visibility="gone"
      app:layout_constraintBottom_toBottomOf="parent"/>
  </android.support.constraint.ConstraintLayout>

</RelativeLayout>