The property wrap_content is not working

Question

I have to make a TextView horizontal inside a LinearLayout and vertical inside a ConstraintLayout.
The problem is that the property wrap_content of the TextView is not working.
This is the xml file:

<?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"
    tools:context="com.example.black_swan.myapplication11.MainActivity"
    tools:layout_editor_absoluteY="81dp"
    tools:layout_editor_absoluteX="0dp">

    <LinearLayout
        android:layout_width="368dp"
        android:layout_height="495dp"
        android:orientation="vertical"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintLeft_toLeftOf="parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/textView8"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="TextView" />
        </LinearLayout>

    </LinearLayout>

</android.support.constraint.ConstraintLayout>

and this is the image of the project:

Answer 1

Remove android:layout_weight="1" on TextView. Further more It seems that your TextView's parent LinearLayout is not useful. Try not using unnecessary nested layouts.