hcp-pad/moca/src/main/res/navigation/nav_moca.xml

<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/nav_moca"
    app:startDestination="@id/alternatingconnectionFragment"
    tools:ignore="ResourceName">

    <fragment
        android:id="@+id/alternatingconnectionFragment"
        android:name="com.yingyangfly.moca.alternatingconnection.AlternatingConnectionFragment"
        android:label="alternatingconnectionFragment"
        tools:layout="@layout/fragment_alternating_connection">

        <action
            android:id="@+id/action_alternatingconnectionFragment_to_signatureFragment"
            app:destination="@id/signatureFragment" />

    </fragment>

    <fragment
        android:id="@+id/signatureFragment"
        android:name="com.yingyangfly.moca.signature.SignatureFragment"
        android:label="signatureFragment">

        <action
            android:id="@+id/action_signatureFragment_to_alternatingconnectionFragment"
            app:destination="@id/alternatingconnectionFragment" />

    </fragment>

</navigation>