gistfile1.txt

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="85dp"
        android:padding="8dp"
        app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
        android:elevation="4dp"
        android:background="#eeeeee"
        android:id="@+id/bottom_shelf"
        app:behavior_hideable="false"
        app:behavior_peekHeight="40dp"
        app:layout_insetEdge="bottom"
    >
        <ImageView
            android:id="@+id/bottom_shelf_indicator"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:srcCompat="@drawable/ic_expand_up" />

        <TextView
            android:id="@+id/total_label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:text="Total:"
            android:textAppearance="@style/TextAppearance.AppCompat.Subhead"
            app:layout_constraintBottom_toBottomOf="@id/bottom_shelf_indicator"
            app:layout_constraintStart_toEndOf="@id/bottom_shelf_indicator"
            app:layout_constraintTop_toTopOf="@id/bottom_shelf_indicator" />

        <TextView
            android:id="@+id/total_amount"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:text="0.00 €"
            android:textAppearance="@style/TextAppearance.AppCompat.Subhead"
            app:layout_constraintBottom_toBottomOf="@id/bottom_shelf_indicator"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/total_label"
            app:layout_constraintTop_toTopOf="@id/bottom_shelf_indicator" />

        <AutoCompleteTextView
            android:id="@+id/note_entry"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:completionThreshold="1"
            android:hint="Note... (optional)"
            android:imeOptions="actionNext"
            android:inputType="text"
            app:layout_constraintTop_toBottomOf="@id/bottom_shelf_indicator"
            />
    </android.support.constraint.ConstraintLayout>