android - Error inflating class Fragment, when adding navGraph attribute

Question

I know there are a few questions and answers about this problem, but none of the solutions fixed my problem. I get an

android.view.InflateException: Binary XML file line #11: Binary XML file line #11: Error inflating class fragment

error, when I add the navGraph attribute with the navigation xml-file.

---

So here is my activity_login.xml (with the fragment container):

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".LoginActivity">

<fragment
    android:name="androidx.navigation.fragment.NavHostFragment"
    android:id="@+id/loginFragmentContainer"
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:defaultNavHost="true"

    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"

    app:navGraph="@navigation/nav_graph"/>

</androidx.constraintlayout.widget.ConstraintLayout>

---

The nav_graph.xml is just as empty as it is generated.

---

Here are the important dependencies for the fragment:

implementation "androidx.navigation:navigation-fragment:2.3.0"
implementation "androidx.navigation:navigation-ui:2.3.0"
implementation "androidx.navigation:navigation-fragment-ktx:2.3.0"
implementation "androidx.navigation:navigation-ui-ktx:2.3.0"
implementation "androidx.navigation:navigation-dynamic-features-fragment:2.3.0"
androidTestImplementation "androidx.navigation:navigation-testing:2.3.0"
implementation "androidx.fragment:fragment:1.2.5"
implementation "androidx.navigation:navigation-fragment-ktx:2.3.0"
implementation "androidx.navigation:navigation-ui-ktx:2.3.0"

When I do not include this line app:navGraph="@navigation/nav_graph" in my activity_login.xml -layout, I do not get an error. What's my mistake?

I am using Android Studio 4.1 Canary 10

Please just ask if I need to share more code or information... Thanks in advance and best regards!

标签： androidxmlandroid-layoutandroid-fragmentsandroid-navigation-graph

Answer 1

您的导航图需要至少有一个目的地 - 您的图表的起始目的地和用户根据入门指南扩充图表时看到的第一个屏幕。