Android fragments FragmentContainerView:导航图中的片段不会膨胀
所以,我遵循Google的Kotlin基础课程和主题3.2(添加导航抽屉),创建了一个XML文件,在其中我添加了一个片段作为NavHostFragment,它给了我一个警告,用FragmentContainerView替换它,我忽略了它,但我的应用程序不断崩溃,给了我无法膨胀片段的错误。因此,我将片段替换为FragmentContainerView。现在,我的应用程序启动了,但它不会膨胀在导航中设置为启动片段的片段。如果你们能帮我,那就太好了。蒂亚 Activity_main.xml:Android fragments FragmentContainerView:导航图中的片段不会膨胀,android-fragments,kotlin,navigation-drawer,android-inflate,android-navigation-graph,Android Fragments,Kotlin,Navigation Drawer,Android Inflate,Android Navigation Graph,所以,我遵循Google的Kotlin基础课程和主题3.2(添加导航抽屉),创建了一个XML文件,在其中我添加了一个片段作为NavHostFragment,它给了我一个警告,用FragmentContainerView替换它,我忽略了它,但我的应用程序不断崩溃,给了我无法膨胀片段的错误。因此,我将片段替换为FragmentContainerView。现在,我的应用程序启动了,但它不会膨胀在导航中设置为启动片段的片段。如果你们能帮我,那就太好了。蒂亚 Activity_main.xml: <
<?xml version="1.0" encoding="utf-8"?>
<layout 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">
<androidx.drawerlayout.widget.DrawerLayout
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.fragment.app.FragmentContainerView
android:id="@+id/myNavHostFragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:navGraph="@navigation/navigation"
tools:layout="@layout/login_fragment" />
<com.google.android.material.navigation.NavigationView
android:id="@+id/navView"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="@layout/nav_header"
app:menu="@menu/navdrawer_menu" />
</androidx.drawerlayout.widget.DrawerLayout>
</layout>
class MainActivity : AppCompatActivity() {
private lateinit var drawerLayout: DrawerLayout
private lateinit var binding: ActivityMainBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
binding = DataBindingUtil.setContentView<ActivityMainBinding>(this, R.layout.activity_main)
drawerLayout = binding.drawerLayout
val navHostFragment = supportFragmentManager.findFragmentById(R.id.myNavHostFragment) as NavHostFragment
val navController = navHostFragment.navController
//val navController = this.findNavController(R.id.myNavHostFragment)
NavigationUI.setupActionBarWithNavController(this, navController, drawerLayout)
NavigationUI.setupWithNavController(binding.navView, navController)
navController.setGraph(R.navigation.navigation)
}
override fun onSupportNavigateUp(): Boolean {
val navHostFragment = supportFragmentManager.findFragmentById(R.id.myNavHostFragment) as NavHostFragment
val navController = navHostFragment.navController
//val navController = this.findNavController(R.id.myNavHostFragment)
return NavigationUI.navigateUp(navController, drawerLayout)
}
}
<?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/navigation"
app:startDestination="@id/loginFragment">
<fragment
android:id="@+id/loginFragment"
android:name="com.example.kotlinfundamentals.login.LoginFragment"
android:label="LoginFragment" >
<action
android:id="@+id/action_loginFragment_to_registerFragment"
app:destination="@id/registerFragment" />
<action
android:id="@+id/action_loginFragment_to_homeFragment"
app:destination="@id/homeFragment"
app:popUpTo="@id/loginFragment"
app:popUpToInclusive="true" />
</fragment> </navigation>