class UserFragment : Fragment(), View.OnClickListener {
private val userBinding: FragmentUserBinding by onCreateView<Fragment, FragmentUserBinding>(R.layout.fragment_user)
val user: ObservableField<String> = ObservableField()
private var bundle = Bundle()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
userBinding.main = this
}
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?) = userBinding.root!!
override fun onClick(p0: View?) {
runAnimation(500L, Techniques.RubberBand, p0)
Handler().postDelayed({
saveUserAndStartLetterFragment()
}, 700L)
}
private fun saveUserAndStartLetterFragment() {
var fragment = WordpackChooserFragment()
bundle.putString("User",user.get())
fragment.arguments = bundle
activity!!.supportFragmentManager.replaceFragment(fragment, activity!!.findViewById(R.id.flContainer))
}
}
In this fragment I declare the bundle. I do not specify it as nullable.
class WordpackChooserFragment : Fragment(), View.OnClickListener {
private val wordpackChooserBinding: FragmentWordpackChooserBinding by onCreateView<Fragment, FragmentWordpackChooserBinding>(R.layout.fragment_wordpack_chooser)
private var bundle: Bundle = Bundle()
private lateinit var fragment: Fragment
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
wordpackChooserBinding.main = this
setRecycler()
bundle = arguments
return wordpackChooserBinding.root
}
override fun onClick(v: View?) {
fragment = RoundsChooserFragment()
bundle.putStringArrayList("Wordpack", selectedPack)
fragment.arguments = bundle
activity!!.supportFragmentManager.replaceFragment(fragment, activity!!.findViewById(R.id.flContainer))
}
private fun setRecycler() {
wordpackChooserBinding.root.btn_recycler.layoutManager = LinearLayoutManager(this.context)
wordpackChooserBinding.root.btn_recycler.adapter = BtnAdapter(this)
wordpackChooserBinding.root.btn_recycler.adapter.notifyDataSetChanged()
}
}
In this fragment this line bundle = arguments errors with the following:
Type mismatch.
Required: Bundle
Found: Bundle?
I can use the non-null assertion operator '!!' but It seems like a hack.
arguments is nullable (note the "if any" in the description of the link), therefore you can not simply assign it to a non-nullable Bundle. You would either handle the case of it being null (using an if), using !! or you could write something like this:
arguments?.let { bundle = it }
However, I'd say its preferred to use let.
Related
I have two fragments and want to open second fragment (WordFragment) when pressing button of the first one(SearchFragment) by Bundle. But Fragment shwos default data instead of the passed one.
ClickListener in First Fragment:
searchDefAdapter = SearchDefAdapter(
object : SearchDefAdapter.OnItemClickListener {
override fun onItemClick(position: Int) {
val bundle = Bundle()
val arr = arrayOf("word", "слово", "I give you my word")
bundle.putStringArray(INFO_BUNDLE_ID, arr)
val wordFragment = WordFragment()
wordFragment.arguments = bundle
parentFragmentManager.beginTransaction().apply {
replace(R.id.searchFragment, WordFragment())
commit()
}
}
},
object : SearchDefAdapter.OnItemClickListener {
override fun onItemClick(position: Int) {
//viewModel.saveWord(position)
}
}
)
Second Fragment:
class WordFragment : Fragment() {
private var _binding: FragmentWordBinding? = null
private val binding get() = _binding!!
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
_binding = FragmentWordBinding.inflate(inflater, container, false)
val view = binding.root
arguments?.let {
val translation = it.getStringArray(INFO_BUNDLE_ID)
if (translation != null){
binding.wordTitleTv.text = translation[0]
binding.translationTv.text = translation[1]
binding.exampleTv.text = translation[2]
}
}
return view
}
override fun onDestroyView() {
_binding = null
super.onDestroyView()
}
}
this is because you create new WordFragment here replace(R.id.searchFragment, WordFragment()) instead of putting the one you added the bundle to it.
I need to get session id to menu fragment. but it doesn't work. In this I get Session ID from Login Activity. Now I need to get that id to Menu fragment. In this one activity loaded five Fragments. I used bundle for load data.
Here's my activity.kt
class Home : AppCompatActivity() {
private val HomeFragment = HomeFragment()
private val CreditsFragment = CreditsFragment()
private val BusFragment = BusFragment()
private val NotificationsFragment = NotificationsFragment()
private val MenuFragment = MenuFragment()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.home)
val sessionId = intent.getStringExtra("EXTRA_SESSION_ID")
textView4.setText(sessionId)
replaceFragment(HomeFragment)
bottomNavBar.setOnNavigationItemSelectedListener{
when (it.itemId){
R.id.menu_home -> replaceFragment(HomeFragment)
R.id.menu_credits -> replaceFragment(CreditsFragment)
R.id.menu_bus -> replaceFragment(BusFragment)
R.id.menu_notification -> replaceFragment(NotificationsFragment)
R.id.menu_menu -> replaceFragment(MenuFragment)
}
true
}
val bundle = Bundle()
bundle.putString("EXTRA_SESSION_ID", sessionId)
val myObj = MenuFragment()
myObj.setArguments(bundle)
}
private fun replaceFragment (fragment:Fragment){
val transaction = supportFragmentManager.beginTransaction()
transaction.replace(R.id.fragment_container, fragment);
transaction.addToBackStack(null);
transaction.commit();
}
}
here's my updated menu fragment.kt. I think I have problem in this. can u plzzz help me to find it.
class MenuFragment : Fragment() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
arguments?.let {
var sessionId = it.toString()
emailAddressText.setText(sessionId)
}
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
return inflater.inflate(R.layout.fragment_menu, container, false)
}
companion object {
}
}
change activity to this :
val bundle = Bundle()
bundle.putString("EXTRA_SESSION_ID", sessionId)
MenuFragment.setArguments(bundle)
bottomNavBar.setOnNavigationItemSelectedListener{
when (it.itemId){
R.id.menu_home -> replaceFragment(HomeFragment)
R.id.menu_credits -> replaceFragment(CreditsFragment)
R.id.menu_bus -> replaceFragment(BusFragment)
R.id.menu_notification -> replaceFragment(NotificationsFragment)
R.id.menu_menu -> replaceFragment(MenuFragment)
}
true
}
in the fragment you also need to use arguments.getString("EXTRA_SESSION_ID") to retreive sessionId value. and place emailAddressText.setText(sessionId)
in onViewCreated method because in onCreate() method views are not ready yet.
so change the fragment like this :
class MenuFragment : Fragment() {
var sessionId = ""
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
arguments?.let {
sessionId = it.getString("EXTRA_SESSION_ID","")
}
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
return inflater.inflate(R.layout.fragment_menu, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
emailAddressText.setText(sessionId)
}
}
The MenuFragment instance you have in your replaceFragment transaction is different from the one where you set the sessionid argument to.
Remove the other instantiation val myObj = MenuFragment() and set arguments on MenuFragment instead.
(Naming convention hint: it's easier to keep types and objects apart if types are CamelCase and types lowerCamelCase. For example, private val menuFragment = MenuFragment().)
Im trying to pass data between two fragments but i have an error with arguments in execution when i launch fullFragment
i updated my code
Can you help me ?
architecture :
ListeFragment (sender) :
class ListeFragment : Fragment() {
companion object {
fun newInstance(s: String) = ListeFragment()
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View {
val layout = inflater.inflate(R.layout.liste_fragment, container, false)
val photo1 = layout.findViewById<ImageView>(R.id.imageButton1)
val model = ViewModelProviders.of(this).get(ListeViewModel::class.java)
imageButton1.setOnClickListener {
val newFragment = FullFragment()
val args = Bundle()
args.putString("key1", "data")
newFragment.arguments = args
Navigation.findNavController(imageButton1).navigate(R.id.versFullFragment);
}
FullFragment (receiver):
class FullFragment : Fragment() {
companion object {
fun newInstance() = FullFragment()
}
private lateinit var viewModel: FullViewModel
override fun onCreate( savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
var value1 = getArguments()?.getString("key1")
Log.v("value" , value1.toString())
Toast.makeText(context, value1.toString(), Toast.LENGTH_SHORT).show()
}
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
val layout = inflater.inflate(R.layout.full_fragment, container, false)
return layout
}
I don't know what "newFragment.arguments = args" do because in FullFragment class I don't see any variable with that name, however you have to use "Fragment.setArguments(Bundle)" to set Fragment Arguments from the first one. Then in the Full you will have a correct result from "FullFragment.getArguments()" method.
PS: don't forget that the Context could be NULL in Fragment class and it should be handled in proper way.
I'm new to Kotlin and android development but i can't find why my program isn't working.
I'm trying to be able to communicate from my first fragment to his child, and testing it with a string but it won't display.
Thanks in advance for your help !!!
My first fragment :
class FirstFragment : Fragment() {
private lateinit var viewModel : Communicator
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_first, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
viewModel = activity?.run {
ViewModelProvider(this).get(Communicator::class.java) // .of supprimé
} ?: throw Exception("Invalid Activity")
viewModel.message.value = "test"
view.findViewById<Button>(R.id.button_stall_selection).setOnClickListener {
findNavController().navigate(R.id.action_FirstFragment_to_SecondFragment)
}
}
}
Here is my second :
class SecondFragment() : Fragment() {
private lateinit var viewModel :Communicator
private var msg: String? = ""
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_second, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
viewModel = activity?.run {
ViewModelProvider(this).get(Communicator::class.java) // .of deleted
} ?: throw Exception("Invalid Activity")
viewModel.message.observe(viewLifecycleOwner, Observer {
msg = viewModel.message.value
})
view.findViewById<TextView>(R.id.textView_1).text = msg
view.findViewById<Button>(R.id.button_second).setOnClickListener {
findNavController().navigate(R.id.action_SecondFragment_to_FirstFragment)
}
}
}
and finally here is the viewModel class i'm trying to use in order to communicate :
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel
class Communicator() : ViewModel(){
val message =MutableLiveData<String>()
fun setMsgCommunicator(msg:String){
message.setValue(msg)
}
}
In your FirstFragment, try to call viewModel.setMsgCommunicator("test") instead of directly calling viewModel.message.value = "test"
I have a fragment that I would like to use either as a full screen or as a Dialog content.
I'm trying to pass it this way:
companion object {
val DIALOG_TITLE = "DIALOG_TITLE"
fun getInstance(title: String, content: Fragment): BaseCustomDialogFragment {
return BaseCustomDialogFragment().apply {
arguments?.putString(DIALOG_TITLE, title)
activity?.fragmentAdd(content)
}
}
}
Obviously, this solution won't work. As long the Fragment hasn't been attached, we don't have access to the activity.
Is there any way to achieve the same outcome without triggering the load from the Activity?
I found a workaround for this. Instead of passing the Fragment, we include Fragment's class and arguments (Class<T> and Bundle).
Then, we create and add the fragment onViewCreated()
Here is the code:
class BaseCustomDialogFragment: Fragment() {
companion object {
val FRAGMENT_CLASS = "FRAGMENT_CLASS"
val ARGUMENTS_BUNDLE = "ARGUMENTS_BUNDLE"
fun <T> getInstance(title: String, fragmentClass: Class<T>, bundle: Bundle): BaseCustomDialogFragment {
return BaseCustomDialogFragment().apply {
arguments = Bundle()
arguments!!.putString(DIALOG_TITLE, title)
arguments!!.putSerializable(FRAGMENT_CLASS, fragmentClass)
arguments!!.putBundle(ARGUMENTS_BUNDLE, bundle)
}
}
}
private lateinit var className: Class<*>
private lateinit var bundle: Bundle
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
(arguments?.getSerializable(FRAGMENT_CLASS) as? Class<*>)?.let { className = it }
arguments?.getBundle(ARGUMENTS_BUNDLE)?.let { bundle = it }
// Inflate View.
return inflater.inflate(R.layout.fragment_custom_dialog, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
setContentUp()
}
private fun setContentUp(){
val fragment = createFragment(className, bundle)
activity?.supportFragmentManager
?.beginTransaction()
?.add(R.id.fragment_dialog_placeholder, fragment)
?.disallowAddToBackStack()
?.commit()
}
private fun <T> createFragment(fragmentClass: Class<T>, arguments: Bundle): Fragment {
val fragment = fragmentClass.newInstance() as Fragment
fragment.arguments = arguments
return fragment
}
I hope it helps to somebody.