在这个新闻应用程序中，我不断得到InflateException

Question

   class MainActivity : AppCompatActivity() {

lateinit var viewModel : NewsViewModel
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    val newsRepository = NewsRepository(ArticleDatabase(this))
    val viewModelProviderFactory = NewsViewModelProviderFactory(newsRepository)
    viewModel = ViewModelProvider(this, viewModelProviderFactory).get(NewsViewModel::class.java)
    bottomNavigationView.setupWithNavController(nav_host_fragment_container.findNavController())
}


<FrameLayout
    android:id="@+id/flFragment"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    app:layout_constraintBottom_toTopOf="@+id/bottomNavigationView"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <fragment
        android:name="androidx.navigation.fragment.NavHostFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/nav_host_fragment_container"
        app:defaultNavHost="true"
        app:navGraph="@navigation/news_nav_graph"/>

</FrameLayout>

<com.google.android.material.bottomnavigation.BottomNavigationView
    android:id="@+id/bottomNavigationView"
    android:layout_width="match_parent"
    android:layout_height="56dp"
    app:backgroundTint="@color/grey"
    app:menu="@menu/bottom_navigation_menu"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="parent"/>

Answer 1

代码中有两处错误

首先，使用相同的变量名命名listview和listfiles

// look at that in these lines, both of them had the same variable name        
private lateinit var list: ListView
val list = dir.listFiles()

第二，这一行的例外部分

val list = dir.listFiles() // dir.listFiles() returns null