hcp-pad/push/src/main/res/drawable/bg_push.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:ignore="ResourceName">

    <item>
        <shape android:shape="rectangle">
            <gradient
                android:angle="90"
                android:endColor="@color/color_ff4571ff"
                android:startColor="@color/color_ff8fafff"
                android:type="linear"
                android:useLevel="true" />
        </shape>
    </item>

</layer-list>