dcms_cr_app / app / src / main / res / layout / line.xml

<?xml version="1.0" encoding="utf-8"?>
<View xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="@dimen/lineViewHeight"
    android:background="@color/darkGray" />