Constraint layout barrier not working as expected-CodePudding

I have 2 views and I need a barrier below but the barrier does not work as expected. Here is my layout.

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <TextView
        android:id="@ id/textView15"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="This is a text view"
        app:layout_constraintEnd_toStartOf="@ id/t1"
        android:textSize="20sp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <com.google.android.material.textfield.TextInputLayout
        android:id="@ id/t1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@ id/textView15"
        app:layout_constraintTop_toTopOf="parent">

        <com.google.android.material.textfield.TextInputEditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="This is a demo text to check wrap content"/>

    </com.google.android.material.textfield.TextInputLayout>

    <androidx.constraintlayout.widget.Barrier
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:barrierDirection="bottom"
        app:constraint_referenced_ids="textView15,t1"/>

</androidx.constraintlayout.widget.ConstraintLayout>

The black dotted line is the barrier.

This might be a bug or I am doing it wrong, The result is same in preview and actual device

CodePudding user response：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <TextView
        android:id="@ id/textView15"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="visible"
        android:text="This is a text view"
        app:layout_constraintEnd_toStartOf="@ id/t1"
        android:textSize="20sp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <com.google.android.material.textfield.TextInputLayout
        android:id="@ id/t1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="visible"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@ id/textView15"
        app:layout_constraintTop_toTopOf="parent">

        <com.google.android.material.textfield.TextInputEditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="This is a demo text to check wrap content"/>

    </com.google.android.material.textfield.TextInputLayout>

    <androidx.constraintlayout.widget.Barrier
        android:id="@ id/barrier"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:barrierDirection="bottom"
        app:constraint_referenced_ids="textView15,t1"/>
    <Space
       android:id="@ id/space"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:visibility="visible"
       app:layout_constraintStart_toStartOf="parent"
       app:layout_constraintTop_toTopOf="@id/barrier" />
</androidx.constraintlayout.widget.ConstraintLayout>

CodePudding user response：

If you specify

app:layout_optimizationLevel="none"

in the XML for the ConstraintLayout, you will find that the barrier will be placed correctly. I am not sure what setting the optimization level achieves, but it has been an issue recently with barriers. (_ConstraintLayout version 2.1.3).