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cc_exp_date.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

<android.support.constraint.ConstraintLayout
        android:id="@+id/navigation_item_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

<Spinner
            android:id="@+id/ccExpMonth"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:contentDescription="@string/cc_exp_month_description"
            app:layout_constraintBottom_toBottomOf="@+id/monthYearDelimiter"
            app:layout_constraintEnd_toStartOf="@+id/monthYearDelimiter"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="@+id/monthYearDelimiter" />

<TextView
            android:id="@+id/monthYearDelimiter"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/slash"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toStartOf="@+id/ccExpYear"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toEndOf="@+id/ccExpMonth"
            app:layout_constraintTop_toTopOf="parent" />

<Spinner
            android:id="@+id/ccExpYear"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:contentDescription="@string/cc_exp_year_description"
            app:layout_constraintBottom_toBottomOf="@+id/monthYearDelimiter"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintStart_toEndOf="@+id/monthYearDelimiter"
            app:layout_constraintTop_toTopOf="@+id/monthYearDelimiter" />
    </android.support.constraint.ConstraintLayout>
</merge>