i want to transfer data from activity to fragment but i get "Error inflating class fragment" I have searched for solution for that problem but still can't.
this is my full code of FirstFragment.kt
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.fragment.app.Fragment
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private const val ARG_PARAM1 = "param1"
private const val ARG_PARAM2 = "param2"
/**
* A simple [Fragment] subclass.
* Use the [FirstFragment.newInstance] factory method to
* create an instance of this fragment.
*/
class FirstFragment : Fragment() {
// TODO: Rename and change types of parameters
private var param1: String? = null
private var param2: String? = null
private lateinit var communicator: Communicator
private lateinit var myTextView: TextView
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
arguments?.let {
param1 = it.getString(ARG_PARAM1)
param2 = it.getString(ARG_PARAM2)
}
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
val view = inflater.inflate(R.layout.fragment_first, container, false)
myTextView = view.findViewById<View>(R.id.profile_name_text) as TextView
// Gets the data from the passed bundle
val bundle = arguments
val message = bundle!!.getString("mText")
// Sets the derived data (type String) in the TextView
myTextView.text = message
return view
}
companion object {
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @param param1 Parameter 1.
* @param param2 Parameter 2.
* @return A new instance of fragment FirstFragment.
*/
// TODO: Rename and change types and number of parameters
@JvmStatic
fun newInstance(param1: String, param2: String) =
FirstFragment().apply {
arguments = Bundle().apply {
putString(ARG_PARAM1, param1)
putString(ARG_PARAM2, param2)
}
}
}
}
my function at Home.kt
fun getData() {
val mFragmentManager = supportFragmentManager
val mFragmentTransaction = mFragmentManager.beginTransaction()
val mFragment = FirstFragment()
val mBundle = Bundle()
val testText = "My Name is Jack"
mBundle.putString("mText",testText)
mFragment.arguments = mBundle
mFragmentTransaction.add(R.id.fragmentContainerView, mFragment).commit()
}
at the fragment_first.xml i want to put the text into the TextView
<?xml version="1.0" encoding="utf-8"?>
<ScrollView 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=".Home">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@ id/linear_Layout_home_1"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginTop="30dp"
android:layout_marginStart="15dp"
android:layout_marginEnd="15dp"
android:paddingStart="15dp"
android:paddingEnd="15dp"
android:paddingTop="10dp"
android:orientation="horizontal"
android:background="@drawable/rounded_blue_shape"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@ id/profile_name_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/nama_pengguna"
android:textStyle="bold"
android:textSize="15sp"
android:textColor="@color/cloudy"/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
this is code of activity_home.xml
<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=".Home">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="@ id/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:menu="@menu/navigation"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toBottomOf="parent"/>
<fragment
android:id="@ id/fragmentContainerView"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:navGraph="@navigation/my_nav"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
Can anybody help me please?
CodePudding user response：
You can pass the data using fragment constructor like this:
fun getData() {
val mFragmentManager = supportFragmentManager
val mFragmentTransaction = mFragmentManager.beginTransaction()
val testText = "My Name is Jack"
val mFragment = FirstFragment(testText)
mFragmentTransaction.add(R.id.fragmentContainerView, mFragment).commit()
}
And fetch it in the fragment like this:
class FirstFragment(private val someText: String): Fragment() {
private lateinit var myTextView: TextView
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
val view = inflater.inflate(R.layout.fragment_first, container, false)
myTextView = view.findViewById<View>(R.id.profile_name_text) as TextView
// Sets the derived data (type String) in the TextView
myTextView.text = someText
return view
}
}
Also seeing your fragment_first.xml layout, you might wanna put it like this:
<RelativeLayout
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">
<TextView
android:id="@ id/profile_name_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/nama_pengguna"
android:textStyle="bold"
android:textSize="15sp"
android:textColor="@color/cloudy"/>
</RelativeLayout>
CodePudding user response：
Not sure what caused your issue. But noticed you are using Jetpack navigation.
And you're trying to pass data to the start destination of the graph.
Here is an official doc for dealing with your case: Pass data to the start destination.
And below are some of the code I tried myself, just for your reference:
I think in your MainActivity.kt, you would have something like this:
val navController = findNavController(R.id.nav_host_fragment_content_main)
navController.setGraph(R.navigation.nav_graph, Bundle().apply {
putString("name", "My name is xx")
})
And in the first fragment, retrieve the parameter:
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val name = arguments?.get("name")
Log.w("xx", "$name")