Where did textView go in NavigationView (Android)?

Question

Android

Android Studio menu template. The NavigationView does not display the textViews described in the nav_header_main.xml file:

<?xml version="1.0" encoding="utf-8"?>
<!--</LinearLayout>-->
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.shipgo.myapplication.MainActivity">

    <!-- Header Menu -->
    <LinearLayout
        android:id="@+id/mainMenu"
        android:layout_width="match_parent"
        android:layout_height="104dp"
        android:background="#ffffff"
        android:gravity="left"
        android:orientation="vertical"
        app:layout_constraintEnd_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:layout_editor_absoluteY="0dp">

        <!-- User Block -->
        <LinearLayout
            android:id="@+id/userBlock"
            android:layout_width="match_parent"
            android:layout_height="104dp"
            android:background="#377CCD"
            android:gravity="left"
            android:orientation="horizontal">

            <!-- user photo -->
            <FrameLayout
                android:id="@+id/imgContainer1"
                android:layout_width="64dp"
                android:layout_height="64dp"
                android:layout_marginTop="20dp"
                android:layout_marginLeft="16dp"


                android:layout_alignParentLeft="true"
                android:layout_alignParentTop="true" >

                <ImageView
                    android:id="@+id/userFace"
                    android:layout_width="64dp"
                    android:layout_height="64dp"
                    android:adjustViewBounds="true"
                    android:src="@drawable/avatar_placeholder" />
            </FrameLayout>

            <!-- margin-right -->
            <FrameLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="16" />

            <!-- user info block -->
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:gravity="left"
                android:layout_marginLeft="20dp"
                android:orientation="vertical">

                <!-- user name -->
                <TextView
                    android:id="@+id/userName"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="bottom"
                    android:layout_marginTop="20dp"
                    android:fontFamily="sans-serif"
                    android:textStyle = "bold"
                    android:textColor="#ffffff"
                    android:textSize="16sp"
                    android:lineSpacingMultiplier="1.25"
                    tools:text="Константин" />

                <!-- user phone -->
                <TextView
                    android:id="@+id/userPhone"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="top"
                    android:fontFamily="sans-serif"
                    android:textColor="#cbffffff"
                    android:textSize="14sp"
                    android:textStyle="normal"
                    android:lineSpacingMultiplier="1.29"
                    android:autoLink="web"
                    android:linksClickable="true"
                    android:textColorLink = "#ff0000"
                    tools:text="[phone]" />

                <!-- margin-bottom -->
                <FrameLayout
                    android:layout_width="match_parent"
                    android:layout_height="10dp" />

                <!-- subscription -->
                <TextView
                    android:id="@+id/userSubscription"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="top"
                    android:fontFamily="sans-serif"
                    android:textColor="#ffffff"
                    android:textSize="16sp"
                    android:textStyle="normal"
                    android:lineSpacingMultiplier="1.25"
                    tools:text="Подписка до 10.09.2017" />
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>

</android.support.constraint.ConstraintLayout>

The difference between the desired and the actual one is visible in the picture (in the emulator - the real one, where there are no textViews, in the Android Studio preview the textView is in its place, as it should be):

Question: where did the text go? How to fix?

Answer 1

Well, did you proset it (text)? tools:text - for view mode only.