Constraint layout example of an unevenly distributed vertical weighted spread inside chain (Screenshot at https://goo.gl/photos/kTWbF7UNbKjy8gKX8)

uneven_vertical_weighted_spread_inside_chain_cl.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- See screenshot at https://goo.gl/photos/kTWbF7UNbKjy8gKX8 -->
<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="208dp"
    android:background="@android:color/black">

    <android.support.constraint.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.75" />
    <FrameLayout
        android:id="@+id/hr_5_peak"
        android:layout_width="5dp"
        android:layout_height="0dp"
        android:layout_marginBottom="2dp"
        android:layout_marginLeft="0dp"
        android:layout_marginTop="16dp"
        android:background="@android:color/darker_gray"
        app:layout_constraintBottom_toTopOf="@+id/hr_4_anaerobic"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintLeft_toLeftOf="@+id/guideline"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_chainStyle="spread_inside" />
    <FrameLayout
        android:id="@+id/hr_4_anaerobic"
        android:layout_width="5dp"
        android:layout_height="0dp"
        android:layout_marginBottom="2dp"
        android:layout_marginLeft="0dp"
        android:layout_marginTop="2dp"
        android:background="@android:color/darker_gray"
        app:layout_constraintBottom_toTopOf="@+id/hr_3_aerobic"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintLeft_toLeftOf="@+id/guideline"
        app:layout_constraintTop_toBottomOf="@+id/hr_5_peak" />

    <FrameLayout
        android:id="@+id/hr_3_aerobic"
        android:layout_width="5dp"
        android:layout_height="0dp"
        android:layout_marginBottom="2dp"
        android:layout_marginLeft="0dp"
        android:layout_marginTop="2dp"
        android:background="@android:color/darker_gray"
        app:layout_constraintBottom_toTopOf="@+id/hr_2_fatburn"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintLeft_toLeftOf="@+id/guideline"
        app:layout_constraintTop_toBottomOf="@+id/hr_4_anaerobic"
        tools:layout_editor_absoluteY="247dp" />
    <FrameLayout
        android:id="@+id/hr_2_fatburn"
        android:layout_width="5dp"
        android:layout_height="0dp"
        android:layout_marginBottom="2dp"
        android:layout_marginLeft="0dp"
        android:layout_marginTop="2dp"
        android:background="@android:color/darker_gray"
        app:layout_constraintBottom_toTopOf="@+id/hr_1_warm"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintLeft_toLeftOf="@+id/guideline"
        app:layout_constraintTop_toBottomOf="@+id/hr_3_aerobic" />

    <FrameLayout
        android:id="@+id/hr_1_warm"
        android:layout_width="5dp"
        android:layout_height="0dp"
        android:layout_marginBottom="16dp"
        android:layout_marginLeft="0dp"
        android:layout_marginTop="2dp"
        android:background="@android:color/darker_gray"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintLeft_toLeftOf="@+id/guideline"
        app:layout_constraintTop_toBottomOf="@+id/hr_2_fatburn" />

</android.support.constraint.ConstraintLayout>