1<?xml version="1.0" encoding="utf-8"?> 2<navigation xmlns:android="http://schemas.android.com/apk/res/android" 3 xmlns:app="http://schemas.android.com/apk/res-auto" 4 xmlns:tools="http://schemas.android.com/tools" 5 android:id="@+id/nav_graph" 6 app:startDestination="@id/FirstFragment"> 7 8 <fragment 9 android:id="@+id/FirstFragment" 10 android:name="simpleperf.example.cpp.FirstFragment" 11 android:label="@string/first_fragment_label" 12 tools:layout="@layout/fragment_first"> 13 14 <action 15 android:id="@+id/action_FirstFragment_to_SecondFragment" 16 app:destination="@id/SecondFragment" /> 17 </fragment> 18 <fragment 19 android:id="@+id/SecondFragment" 20 android:name="simpleperf.example.cpp.SecondFragment" 21 android:label="@string/second_fragment_label" 22 tools:layout="@layout/fragment_second"> 23 24 <action 25 android:id="@+id/action_SecondFragment_to_FirstFragment" 26 app:destination="@id/FirstFragment" /> 27 </fragment> 28</navigation>