View with minHeight in ConstraintLayout

Question

I have a ConstraintLayout inside a NestedScrollView. The ConstraintLayout contains a bunch of views but the last View can

Answer 1

Add this attribute to the view you'd like to have stretch:

app:layout_constraintHeight_default="spread"

I made a tiny app to demonstrate. No java logic to speak of, but here's the layout:

<?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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="16dp"
        android:background="#caf">

        <TextView
            android:id="@+id/one"
            android:layout_width="0dp"
            android:layout_height="48dp"
            android:gravity="center"
            android:text="hello world"
            android:background="#fff"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintBottom_toTopOf="@+id/two"/>

        <TextView
            android:id="@+id/two"
            android:layout_width="0dp"
            android:layout_height="48dp"
            android:gravity="center"
            android:text="hello world"
            android:background="#eee"
            app:layout_constraintTop_toBottomOf="@+id/one"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintBottom_toTopOf="@+id/three"/>

        <TextView
            android:id="@+id/three"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="center"
            android:text="hello world"
            android:background="#ffffd"
            app:layout_constraintHeight_default="spread"
            app:layout_constraintHeight_min="300dp"
            app:layout_constraintTop_toBottomOf="@+id/two"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"/>

    </android.support.constraint.ConstraintLayout>

</android.support.v4.widget.NestedScrollView>

The bottom view stretches to fill the viewport when it is smaller than the remaining available space, and scrolling is impossible:

The bottom view maintains a fixed height when it is larger than the remaining available space, which makes scrolling possible:

Answer 2

I am using com.android.support.constraint:constraint-layout:1.0.2 and this works for me:

<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <View
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:background="@drawable/gradient"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_min="1500dp"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

    </android.support.constraint.ConstraintLayout>

</android.support.v4.widget.NestedScrollView>

Answer 3

As the first thing is we have to specify the fixed height to each text view or used wrap content as another option.Secondary inside constraint layout the property app:layout_constraintHeight_default="spread" helps the last view to get the remaining complete space left and if no space left then automatically synced to scroll view.

<?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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#caf"
        android:padding="16dp">

        <TextView
            android:id="@+id/one"
            android:layout_width="0dp"
            android:layout_height="48dp"
            android:background="#fff"
            android:gravity="center"
            android:text="hello world"
            app:layout_constraintBottom_toTopOf="@+id/two"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/two"
            android:layout_width="0dp"
            android:layout_height="48dp"
            android:background="#eee"
            android:gravity="center"
            android:text="hello world"
            app:layout_constraintBottom_toTopOf="@+id/three"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/one" />

        <TextView
            android:id="@+id/three"
            android:layout_width="0dp"
            android:layout_height="48dp"
            android:background="#eee"
            android:gravity="center"
            android:text="hello world"
            app:layout_constraintBottom_toTopOf="@+id/four"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/two" />

        <TextView
            android:id="@+id/four"
            android:layout_width="0dp"
            anroid:layout_height="48dp"
            android:background="#eee"
            android:gravity="center"
            android:text="hello world"
            app:layout_constraintBottom_toTopOf="@+id/five"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/three" />

        <TextView
            android:id="@+id/five"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:background="#ffffd"
            android:gravity="center"
            android:text="hello world"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintHeight_default="spread"
            app:layout_constraintHeight_min="300dp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/three" />

    </android.support.constraint.ConstraintLayout>

</android.support.v4.widget.NestedScrollView>