app/src/main/res/layout/nav_header_main.xml
<?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:id="@+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="@dimen/nav_header_height"
android:background="@drawable/side_nav_bar"
android:gravity="bottom"
android:theme="@style/ThemeOverlay.AppCompat.Dark">
<ImageView
android:id="@+id/nav_header_profileimage"
android:layout_width="@dimen/navheader_image_size"
android:layout_height="@dimen/navheader_image_size"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginBottom="16dp"
android:contentDescription="@string/navigation_header_desc"
android:paddingTop="@dimen/nav_header_vertical_spacing"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:srcCompat="@mipmap/ic_launcher_round" />
<TextView
android:id="@+id/nav_header_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="16dp"
android:paddingTop="@dimen/nav_header_vertical_spacing"
android:text="@string/navigation_header_title"
android:textAppearance="@style/TextAppearance.AppCompat.Body1"
app:layout_constraintBottom_toTopOf="@+id/nav_header_email"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/nav_header_profileimage" />
<TextView
android:id="@+id/nav_header_email"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginEnd="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="24dp"
android:text="@string/navigation_header_subtitle"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/nav_header_profileimage" />
</android.support.constraint.ConstraintLayout>