Registering Glance widget in your Android Manifest file.

AndroidManifest.xml

<application>
  
  <receiver
    <!-- Specify the package location of your widget receiver -->
    android:name="your.package.DailyReadWidgetReceiver"
    android:exported="false">
    
    <intent-filter>
        <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
    </intent-filter>
    
    <meta-data
        android:name="android.appwidget.provider"
        android:resource="@xml/widget_provider" />
  </receiver>
  
</applicaton>

widget_initial_layout.xml

// In your main/res/layout
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="@string/app_name" />
    
</FrameLayout>

widget_provider.xml

// In your main/res/xml
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:minWidth="36dp"
    android:minHeight="36dp"
    android:resizeMode="horizontal|vertical"
    android:minResizeWidth="36dp"
    android:minResizeHeight="36dp"
    android:initialLayout="@layout/widget_initial_layout"/>