line.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <gradient
        android:angle="0"
        android:startColor="@color/colorAccent"
        android:endColor="#5AD6E0"
        android:type="linear" />
</shape>