JetPack 导航 - <include> 标记中缺少 'graph' 属性

Question

我开始使用导航组件，我的层次结构是：

我有一个名为 nav_graph 的布局并且是：

<?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"
    android:id="@+id/nav_graph"
    app:startDestination="@id/featureHomeNavGraph">

    <include
        android:id="@+id/featureHomeNavGraph"
        app:graphResName="feature_home_nav_graph"
        app:moduleName="feature_home" />

    <include
        android:id="@+id/featureFavouritesNavGraph"
        app:graphResName="feature_favourites_nav_graph"
        app:moduleName="feature_favourites" />

    ...
</navigation>

然后我将布局创建为：

feature_home_nav_graph.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"
    app:moduleName="feature_home"
    app:startDestination="@id/homeFragment">
    <fragment
        android:id="@+id/homeFragment"
        android:name="HomeFragment"
        android:label="HomeFragment"
        app:moduleName="feature_home" />
</navigation>

feature_favourites_nav_graph.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"
    app:moduleName="feature_favourites"
    app:startDestination="@id/favouritesFragment">
    <fragment
        android:id="@+id/favouritesFragment"
        android:name="FavouritesFragment"
        android:label="FavouritesFragment"
        app:moduleName="feature_favourites" />
</navigation>

但是当 运行 应用

时我收到了这个错误

error: Missing 'graph' attribute in tag.

还有这个

Navigation XML document element must contain a app:graph attribute, whose value begins with @navigation/.

我错过了什么？

Answer 1

问题似乎出在缺少 app:graph 属性的 include 上。应该是：

<include
    app:graph="@id/featureHomeNavGraph"
    ... />

等等。 Reference.