I'm trying to make a todo app using the mvvm build. I have 2 fragments. In AddNoteFragment, the user will enter a note and it will be displayed in this recyclerview in HomeFragment.I specified HomeFragment as start destination in navigation. However, after I wrote the adapter, I encountered this error.
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.enestigli.todoapp/com.enestigli.todoapp.presentation.home.main.MainActivity}: android.view.InflateException: Binary XML file line #10 in com.enestigli.todoapp:layout/activity_main: Binary XML file line #10 in com.enestigli.todoapp:layout/activity_main: Error inflating class androidx.fragment.app.FragmentContainerView
When I searched for this error on the Internet, many results came up, but I could not find anything in the solutions on the Internet. Can you help me what is the problem with my code?
navigation.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"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/navigation"
app:startDestination="@id/homeFragment">
<fragment
android:id="@+id/homeFragment"
android:name="com.enestigli.todoapp.presentation.home.home.HomeFragment"
android:label="fragment_home"
tools:layout="@layout/fragment_home" >
<action
android:id="@+id/action_homeFragment_to_addNoteFragment"
app:destination="@id/addNoteFragment" />
</fragment>
<fragment
android:id="@+id/addNoteFragment"
android:name="com.enestigli.todoapp.presentation.home.addnote.AddNoteFragment"
android:label="fragment_add_note"
tools:layout="@layout/fragment_add_note" >
<action
android:id="@+id/action_addNoteFragment_to_homeFragment"
app:destination="@id/homeFragment" />
</fragment>
</navigation>
HomeFragment
@AndroidEntryPoint
class HomeFragment @Inject constructor(
private val homeRecyclerAdapter:HomeRecyclerAdapter
): Fragment(R.layout.fragment_home) {
private lateinit var viewModel: HomeViewModel
private var fragmentBinding : FragmentHomeBinding? = null
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
viewModel = ViewModelProvider(requireActivity()).get(HomeViewModel::class.java)
val binding = FragmentHomeBinding.bind(view)
fragmentBinding = binding
subscribeToObservers()
binding.HomeFragmentRecyclerView.adapter = homeRecyclerAdapter
binding.HomeFragmentRecyclerView.layoutManager = LinearLayoutManager(requireContext())
binding.fab.setOnClickListener{
findNavController().navigate(HomeFragmentDirections.actionHomeFragmentToAddNoteFragment())
}
}
private fun subscribeToObservers(){
viewModel.noteList.observe(viewLifecycleOwner, Observer {
homeRecyclerAdapter.noteList = it
})
}
override fun onDestroy() {
fragmentBinding = null
super.onDestroy()
}
}
HomeViewModel
@HiltViewModel
class HomeViewModel @Inject constructor(
private val repository: INoteRepository
): ViewModel() {
val noteList = repository.getNote()
}
HomeRecyclerAdapter
class HomeRecyclerAdapter : RecyclerView.Adapter<HomeRecyclerAdapter.HomeViewHolder>(){
private val diffUtil = object : DiffUtil.ItemCallback<Note>(){
override fun areItemsTheSame(oldItem: Note, newItem: Note): Boolean {
return oldItem == newItem
}
override fun areContentsTheSame(oldItem: Note, newItem: Note): Boolean {
return oldItem == newItem
}
}
//DiffUtil helper
private val recyclerListDiffer = AsyncListDiffer(this,diffUtil)
var noteList :List<Note>
get() = recyclerListDiffer.currentList
set(value) = recyclerListDiffer.submitList(value)
class HomeViewHolder(itemView: View):RecyclerView.ViewHolder(itemView)
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): HomeViewHolder {
val view = LayoutInflater.from(parent.context).inflate(R.layout.home_row,parent,false)
return HomeViewHolder(view)
}
override fun onBindViewHolder(holder: HomeViewHolder, position: Int) {
val title = holder.itemView.findViewById<TextView>(R.id.AddNoteFragmentTxtTitle)
val desc = holder.itemView.findViewById<TextView>(R.id.AddNoteFragmentTxtNote)
val priority = holder.itemView.findViewById<TextView>(R.id.AddNoteFragmentRadioGroup)
val note = noteList[position]
holder.itemView.apply {
title?.text = "Title: ${note.title}"
}
}
override fun getItemCount(): Int {
return noteList.size
}
}
The whole error
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.enestigli.todoapp, PID: 6741
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.enestigli.todoapp/com.enestigli.todoapp.presentation.home.main.MainActivity}: android.view.InflateException: Binary XML file line #10 in com.enestigli.todoapp:layout/activity_main: Binary XML file line #10 in com.enestigli.todoapp:layout/activity_main: Error inflating class androidx.fragment.app.FragmentContainerView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3676)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3813)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2308)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7898)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
Caused by: android.view.InflateException: Binary XML file line #10 in com.enestigli.todoapp:layout/activity_main: Binary XML file line #10 in com.enestigli.todoapp:layout/activity_main: Error inflating class androidx.fragment.app.FragmentContainerView
Caused by: android.view.InflateException: Binary XML file line #10 in com.enestigli.todoapp:layout/activity_main: Error inflating class androidx.fragment.app.FragmentContainerView
Caused by: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment com.enestigli.todoapp.presentation.home.home.HomeFragment: could not find Fragment constructor
at androidx.fragment.app.Fragment.instantiate(Fragment.java:678)
at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer.java:57)
at androidx.fragment.app.FragmentManager$3.instantiate(FragmentManager.java:498)
at androidx.navigation.fragment.FragmentNavigator.navigate(FragmentNavigator.kt:190)
at androidx.navigation.fragment.FragmentNavigator.navigate(FragmentNavigator.kt:162)
at androidx.navigation.NavGraphNavigator.navigate(NavGraphNavigator.kt:83)
at androidx.navigation.NavGraphNavigator.navigate(NavGraphNavigator.kt:49)
at androidx.navigation.NavController.navigateInternal(NavController.kt:260)
at androidx.navigation.NavController.navigate(NavController.kt:1719)
at androidx.navigation.NavController.onGraphCreated(NavController.kt:1161)
at androidx.navigation.NavController.setGraph(NavController.kt:1086)
at androidx.navigation.NavController.setGraph(NavController.kt:1039)
at androidx.navigation.fragment.NavHostFragment.onCreate(NavHostFragment.kt:155)
at androidx.fragment.app.Fragment.performCreate(Fragment.java:3090)
at androidx.fragment.app.FragmentStateManager.create(FragmentStateManager.java:475)
at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:257)
at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1890)
at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1814)
at androidx.fragment.app.FragmentManager.execSingleAction(FragmentManager.java:1720)
at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:323)
at androidx.fragment.app.FragmentContainerView.<init>(FragmentContainerView.kt:158)
at androidx.fragment.app.FragmentLayoutInflaterFactory.onCreateView(FragmentLayoutInflaterFactory.java:53)
at androidx.fragment.app.FragmentController.onCreateView(FragmentController.java:136)
at androidx.fragment.app.FragmentActivity.dispatchFragmentsOnCreateView(FragmentActivity.java:248)
E/AndroidRuntime: at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:227)
at android.view.LayoutInflater.tryCreateView(LayoutInflater.java:1073)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1001)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:965)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1127)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1088)
at android.view.LayoutInflater.inflate(LayoutInflater.java:686)
at android.view.LayoutInflater.inflate(LayoutInflater.java:538)
at android.view.LayoutInflater.inflate(LayoutInflater.java:485)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:710)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:195)
at com.enestigli.todoapp.presentation.home.main.MainActivity.onCreate(MainActivity.kt:17)
at android.app.Activity.performCreate(Activity.java:8290)
at android.app.Activity.performCreate(Activity.java:8269)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1384)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3657)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3813)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:101)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2308)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7898)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
Caused by: java.lang.NoSuchMethodException: com.enestigli.todoapp.presentation.home.home.HomeFragment.<init> []
at java.lang.Class.getConstructor0(Class.java:2363)
at java.lang.Class.getConstructor(Class.java:1759)
at androidx.fragment.app.Fragment.instantiate(Fragment.java:663)
... 51 more