I am trying to create an OnClickListener that changes the fragment inside of a NavController and I keep getting nothing to happen on button press. Here is my code so far:
MainActivity:
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
val navView: BottomNavigationView = binding.navView
val navController = findNavController(R.id.nav_host_fragment_activity_main)
val appBarConfiguration = AppBarConfiguration(
setOf(
R.id.navigation_check_in, R.id.navigation_dashboard, R.id.navigation_new_emp
)
)
setupActionBarWithNavController(navController, appBarConfiguration)
navView.setupWithNavController(navController)
}
CheckInFragment:
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
binding.newEmpBtn.setOnClickListener(View.OnClickListener {
requireActivity().supportFragmentManager.commit {
replace(R.id.nav_host_fragment_activity_main, NewEmpFragment().newInstance())
setReorderingAllowed(true)
addToBackStack(null)
}
})
}
Currently, this code is not giving an error it just seems to not be working and I've been searching through forums for the last couple of hours. Any ideas would be great!
I think you are missing beginTransaction(). You can try this.
binding.newEmpBtn.setOnClickListener(View.OnClickListener {
val fragmentManager = parentFragmentManager
val fragmentTransaction: FragmentTransaction = fragmentManager.beginTransaction()
fragmentTransaction.replace(
R.id.nav_host_fragment_activity_main,
NewEmpFragment()
)
fragmentTransaction.addToBackStack(null)
fragmentTransaction.commit()
})
Related
I'm learning android development, Im looking up information about navigation components and fragments but I havent understood what is the diferent between
NavigationUI.setupActionBarWithNavController(this,navHostFragment.navController) and setupActionBarWithNavController(navController,appBarConfig).
bellow you can find two codes, In one Im using NavigationUI but In the other I dont.
First one:
class MainActivity : AppCompatActivity() {
private lateinit var binding: ActivityMainBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding= ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
NavigationUI.setupActionBarWithNavController(this,navHostFragment.navController)
binding.bnNavBar.setupWithNavController(navHostFragment.navController)
}
override fun onSupportNavigateUp(): Boolean {
val navController = this.findNavController(R.id.nav_host_fragment)
return navController.navigateUp()
}
}
Second one:
class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {
private lateinit var mainBinding: ActivityMainBinding
private lateinit var appBarConfiguration: AppBarConfiguration
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
mainBinding = ActivityMainBinding.inflate(layoutInflater)
setContentView(mainBinding.root)
val toolBar = mainBinding.activityMainContent.mainToolbar
//Setting up the tool bar as the app bar for the activity
setSupportActionBar(toolBar)
val host: NavHostFragment =
supportFragmentManager.findFragmentById(R.id.nav_host_fragment_container) as NavHostFragment
val navController = host.navController
//appBarConfiguration = AppBarConfiguration(navController.graph)
appBarConfiguration = AppBarConfiguration(
setOf(R.id.continentFragment),
mainBinding.drawerLayout
)
//First
setUpActionBar(navController,appBarConfiguration)
//Second
setUpNavigationView(navController)
}
private fun setUpActionBar(navController: NavController, appBarConfig : AppBarConfiguration) {
setupActionBarWithNavController(navController,appBarConfig)
}
private fun setUpNavigationView(controller: NavController) {
mainBinding.navView.setupWithNavController(controller)
}
override fun onNavigationItemSelected(item: MenuItem): Boolean {
mainBinding.drawerLayout.closeDrawer(GravityCompat.START)
return true
}
override fun onSupportNavigateUp(): Boolean {
val navController = findNavController(R.id.nav_host_fragment_container)
return navController.navigateUp(appBarConfiguration)|| super.onSupportNavigateUp()
}
override fun onBackPressed() {
if (mainBinding.drawerLayout.isDrawerOpen(GravityCompat.START)) {
mainBinding.drawerLayout.closeDrawer(GravityCompat.START)
} else {
super.onBackPressed()
}
}
}
Please, I'd be very thankful if someone can explain me the diference.
Ive read a lot about navigation but I havent found anything useful
I'm developing a simple app, with several static screens, just. I get working passing from first fragment, but can't go back to any screen ever.
I saw some videos, like shorturl.at/jFPRY, but in any cases makes work. In my MainActivity I have the OnCreate method, where I save the instance, set the layout, and add a Listener to options on my menu itens.
In the first click, when I open the app, it goes to correct destiny. However, when I click another item it does nothing, stucked. I need to set the Fragments bidirectional, in other words, the user can view any fragment in any moment from any fragment.
My OnCreate method:
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
setSupportActionBar(binding.appBarMain.toolbar)
val drawerLayout: DrawerLayout = binding.drawerLayout
val navView: NavigationView = binding.navView
navView.setNavigationItemSelectedListener {
when (it.itemId) {
R.id.nav_conheca_a_UFTM -> {
supportFragmentManager.beginTransaction()
.replace(R.id.drawer_layout, ConhecaUftmFragment())
.commit()
// Remove the other operations
supportFragmentManager.beginTransaction().addToBackStack(null);
}
R.id.nav_calendario_academico -> {
supportFragmentManager.beginTransaction()
.replace(R.id.drawer_layout, GalleryFragment())
.commit()
// Remove the other operations
supportFragmentManager.beginTransaction().addToBackStack(null);
}
R.id.nav_mural_de_informacoes -> {
supportFragmentManager.beginTransaction()
.replace(R.id.drawer_layout, CalendarioFragment())
.commit()
// Remove the other operations
supportFragmentManager.beginTransaction().addToBackStack(null);
}
}
it.isChecked = true
drawerLayout.closeDrawers()
true
}
supportActionBar?.apply {
setDisplayHomeAsUpEnabled(true)
}
navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main)
val appBarConfiguration = AppBarConfiguration(navController.graph, drawerLayout)
NavigationUI.setupWithNavController(binding.appBarMain.toolbar, navController, appBarConfiguration)
NavigationUI.setupActionBarWithNavController(this, navController, drawerLayout)
}
I have also the method onSupportNavigateUp:
override fun onSupportNavigateUp(): Boolean {
val navController = this.findNavController(id.nav_host_fragment_content_main)
return navController.navigateUp()
}
And here is an example of Fragment that I have:
class GalleryFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
): View? {
val view = inflater.inflate(R.layout.fragment_calendario_academico, container, false)
/* view.setOnClickListener(){ Navigation.findNavController(view).
navigate(R.id.conhecauftmToaprimorando)
}*/
return view
}
override fun onDestroyView() {
super.onDestroyView()
}
}
I will pass my GitHub link, if anyone can help to fix this issue.
First approach would be to not use FragmentTransactions when you using NavComponent.
If you have the MenuOptions on the MainActivity layout (which I don't recommend, it should go on every fragment, so the MenuOptions are correlated to the current fragment) you can define your navigations in the nav_graph.xml and use them in the MainActivity through NavigationDirections object.
Please visit https://developer.android.com/guide/navigation/navigation-getting-started for more info.
If you want to come back from GalleryFragment to where you have defined the destination of the Popback behaviour, you should call: findNavController.popBackStack()
I want to load all fragment once or on first click. I don't want to recreate fragment on clicking bottom menu
MainActivity.kt
#AndroidEntryPoint
class MainActivity : AppCompatActivity() {
private lateinit var binding: ActivityMainBinding
private lateinit var navController:NavController
private lateinit var appBarConfiguration:AppBarConfiguration
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
supportActionBar?.hide()
val navView: BottomNavigationView = binding.navView
val navHostFragment =
supportFragmentManager.findFragmentById(R.id.nav_host_fragment_activity_main) as NavHostFragment
navController = navHostFragment.navController
appBarConfiguration = AppBarConfiguration(
setOf(
R.id.navigation_home, R.id.navigation_campaigns, R.id.navigation_credits,R.id.navigation_masks,R.id.navigation_messages
)
)
setupActionBarWithNavController(navController, appBarConfiguration)
navView.setupWithNavController(navController)
}
override fun onSupportNavigateUp(): Boolean {
return NavigationUI.navigateUp(navController, appBarConfiguration)
}
}
I have MainActivity with BottomNavigationView like so:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val navView: BottomNavigationView = findViewById(R.id.nav_view)
val navController = findNavController(R.id.nav_host_fragment)
navView.setupWithNavController(navController)
}
}
Also, I have a setting button on top of the navigation view. On this button click, I wish the setting fragment appear on top of the navigation fragment and hide it and display the setting in full screen.
Something like so:
val settingsFragment = SettingFragment.newInstance()
val fragmentTransaction = supportFragmentManager.beginTransaction()
fragmentTransaction.addToBackStack(null)
fragmentTransaction.replace(/*what to user here*/, settings)
fragmentTransaction.commit()
Here is the solution:
val navHostFragment
= supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
navHostFragment.childFragmentManager
.beginTransaction()
.replace(navHostFragment.id, SettingsFragment())
.addToBackStack(null)
.commit()
So, I use the latest version of androidstudio and kotlin.
I created a bottom navigation activity project, and I use the activity with the drefault generated code.
I would like to open/replace a fragment from another fragment by button.
But the previous fragment doesn't disappear, when the new fragment is appear, so both are visible.
I read a lot, but I don't know the solution, please help me with some advice.
This is my MainActivity
override fun onCreate(savedInstanceState: Bundle ? ) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val navView: BottomNavigationView = findViewById(R.id.nav_view)
val navController = findNavController(R.id.nav_host_fragment)
// Passing each menu ID as a set of Ids because each
// menu should be considered as top level destinations.
val appBarConfiguration = AppBarConfiguration(setOf(
R.id.navigation_advertisements, R.id.navigation_own_advertisements, R.id.navigation_chat, R.id.navigation_party, R.id.navigation_settings))
setupActionBarWithNavController(navController, appBarConfiguration)
navView.setupWithNavController(navController)
}
And this is my fragment
override fun onViewCreated(view: View, savedInstanceState: Bundle ? ) {
super.onViewCreated(view, savedInstanceState)
button.setOnClickListener {
activity!!.supportFragmentManager
.beginTransaction()
.replace(R.id.nav_host_fragment, ChatFragment())
.commit()
}
}