<?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_graph" app:startDestination="@id/FirstFragment"> <fragment android:id="@+id/FirstFragment" android:name="org.ntlab.irisclient.FirstFragment" android:label="@string/first_fragment_label" tools:layout="@layout/fragment_first" > <action android:id="@+id/action_FirstFragment_to_SecondFragment" app:destination="@id/SecondFragment" /> </fragment> <fragment android:id="@+id/SecondFragment" android:name="org.ntlab.irisclient.SecondFragment" android:label="@string/second_fragment_label" tools:layout="@layout/fragment_second" > <action android:id="@+id/action_SecondFragment_to_FirstFragment" app:destination="@id/FirstFragment" /> </fragment> </navigation>