Adding gradient

gradient

<?xml version="1.0" encoding="utf-8"?>
<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <gradient
        android:startColor="@color/material_blue_grey_800"
        android:endColor="@color/material_deep_teal_500"
        android:angle="-45"/>
</shape>

in the fragment add background="@drawable/gradient.xm;