I switch fragments by navigation. I decided to add welcome screen with fragment to my app. I made welcome fragment as home fragment, so app starts with welcome fragment. After the welcome, I need to automatically switch to another fragment and destroy the starting fragment so that it can no longer be returned.But when fragment switches,the welcome fragment is visible under the new fragment. I solved it by android:background="?android:windowBackground". Now the new fragment overlaps the welcome fragment, but the welcome fragment still remains under the new fragment, and when I press the back arrow on the device, the welcome fragment appears again.I also removed the toolbar from the welcome fragment, and when the fragment switches, I show the toolbar, but the toolbar from the welcome fragment is displayed on the new fragment.Help my please. How to destroy welcome fragment and never come back to him?
This is main Activity
class MainActivity : AppCompatActivity() {
private lateinit var appBarConfiguration: AppBarConfiguration
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
setSupportActionBar(toolbar)
val drawerLayout: DrawerLayout = findViewById(R.id.drawer_layout)
val navView: NavigationView = findViewById(R.id.nav_view)
val navController = findNavController(R.id.nav_host_fragment)
appBarConfiguration = AppBarConfiguration(setOf(
R.id.nav_food_text_analysis, R.id.nav_recipe_analysis,R.id.welcome_fragment), drawerLayout)
setupActionBarWithNavController(navController, appBarConfiguration)
navView.setupWithNavController(navController)
}
override fun onSupportNavigateUp(): Boolean {
val navController = findNavController(R.id.nav_host_fragment)
return navController.navigateUp(appBarConfiguration) || super.onSupportNavigateUp()
}
}
This is MainActivity xml file
<androidx.drawerlayout.widget.DrawerLayout 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"
android:id="#+id/drawer_layout"
android:fitsSystemWindows="true"
tools:context=".MainActivity"
tools:openDrawer="start">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/toolbar_background"/>
</com.google.android.material.appbar.AppBarLayout>
<fragment
android:id="#+id/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph = "#navigation/mobile_navigation"
app:defaultNavHost="true"
/>
</LinearLayout>
<com.google.android.material.navigation.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:layout_gravity="start"
app:headerLayout="#layout/layout_header_main"
app:menu="#menu/activiy_main_drawer" />
</androidx.drawerlayout.widget.DrawerLayout>
This is Welcome Fragment
private lateinit var topAnimation: Animation
private lateinit var bottomAnimation: Animation
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
return inflater.inflate(R.layout.fragment_welcome_screen, container, false)
}
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
(activity as AppCompatActivity).supportActionBar?.hide()
topAnimation = AnimationUtils.loadAnimation(activity, R.anim.top_animation)
bottomAnimation = AnimationUtils.loadAnimation(activity, R.anim.bottom_animation)
image_diet_girl.animation = topAnimation
welcome_text.animation = bottomAnimation
Handler().postDelayed({
(activity as AppCompatActivity).supportFragmentManager
.beginTransaction()
.setCustomAnimations(
R.anim.enter_from_right,
R.anim.exit_to_right
)
.replace(R.id.nav_host_fragment, FoodAnalysisFragment())
.commit()
},6000)
}
}
Navigation xml
<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/mobile_navigation"
app:startDestination="#id/welcome_fragment">
<fragment
android:id="#+id/nav_food_text_analysis"
android:name="com.example.nutritionfacts.ui.foodTextAnalysis.FoodAnalysisFragment"
android:label="Food analysis"
tools:layout="#layout/fragment_food_text_analysis" />
<fragment
android:id="#+id/nav_recipe_analysis"
android:name="com.example.nutritionfacts.ui.recipeAnalysis.RecipeAnalysis"
android:label="Recipe analysis"
tools:layout="#layout/fragment_recipe_analysis" />
<fragment
android:id="#+id/welcome_fragment"
android:name="com.example.nutritionfacts.ui.welcomeScreen.WelcomeScreen"
android:label="welcome screen"
tools:layout="#layout/fragment_welcome_screen" />
</navigation>
Related
I want to set my navigation drawer menu on a Fragment. I don't want the navigation drawer to show up when I start my app. I want it to show up after I enter another page (i.e. not first page). But the problem is, onSupportNavigateUp can only be written on MainActivity, which is the first page.
This is my MainActivity.kt :
class MainActivity : AppCompatActivity() {
private lateinit var drawerLayout: DrawerLayout
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
#Suppress("UNUSED_VARIABLE")
val binding = DataBindingUtil.setContentView<ActivityMainBinding>(this, R.layout.activity_main)
drawerLayout = binding.drawerLayout
val navController = this.findNavController(R.id.myNavHostFragment)
NavigationUI.setupActionBarWithNavController(this,navController, drawerLayout)
NavigationUI.setupWithNavController(binding.navView, navController)
}
override fun onSupportNavigateUp(): Boolean {
val navController = this.findNavController(R.id.myNavHostFragment)
return NavigationUI.navigateUp(navController, drawerLayout)
}
}
Here is my activity_main.xml
`
<androidx.drawerlayout.widget.DrawerLayout
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<fragment
android:id="#+id/myNavHostFragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:navGraph="#navigation/navigation"
app:defaultNavHost="true"
/>
</LinearLayout>
<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>
`
It takes fragment_title.xml display and use it for activity_main.xml display by using fragment tag and NavHostFragment.
I also have another fragment called fragment_home.xml and HomeFragment.kt class.
What I don't know is, how to not show the navigation drawer when I'm on title fragment and start showing the navigation drawer when I'm on home fragment?
Below code will set navView visibility gone in TitleFragment and set visible on the other destinations:
navController.addOnDestinationChangedListener { _, destination, _ ->
if (destination.id == R.id.titleFragment) {
navView.visibility = View.GONE
} else {
navView.visibility = View.VISIBLE
}
}
I'm making slidable menu and hamburger icon/sliding not working. I'm also not sure if this working how i think: when we are setting FragmentContainerView like this
<androidx.fragment.app.FragmentContainerView
app:navGraph="#navigation/nav_graph"
We are refer to Fragment set in navigation manager, am I right?
Code:
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
val binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
if (savedInstanceState == null) {
supportFragmentManager.beginTransaction()
.replace(R.id.container, EggTimerFragment.newInstance())
.commitNow()
}
val navHostFragment =
supportFragmentManager.findFragmentById(R.id.nav_graph) as NavHostFragment
val navController = navHostFragment.navController
findViewById<NavigationView>(R.id.nav_view)
.setupWithNavController(navController)
val appBarConfiguration = AppBarConfiguration(navController.graph, binding.drawerLayout)
NavigationUI.setupActionBarWithNavController(this, navController, binding.drawerLayout)
NavigationUI.setupWithNavController(binding.navView, navController)
binding.navView.setNavigationItemSelectedListener {
when(it.itemId){
R.id.item1 -> Toast.makeText(applicationContext, "item1 clicked", Toast.LENGTH_SHORT).show()
}
true
}
super.onCreate(savedInstanceState)
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
if(toggle.onOptionsItemSelected(item)){
return true
}
return onOptionsItemSelected(item)
}
XML main_activity file:
<?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">
<androidx.drawerlayout.widget.DrawerLayout
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".app.MainActivity">
<androidx.fragment.app.FragmentContainerView
app:navGraph="#navigation/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:id="#+id/myNavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
/>
<com.google.android.material.navigation.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
app:headerLayout="#layout/nav_header"
app:menu="#menu/nav_header_menu"
android:layout_gravity="start"
android:fitsSystemWindows="true"/>
</androidx.drawerlayout.widget.DrawerLayout>
</layout>
Maybe I should cut some code and move it to fragment? Android guide is too briefly and unclear for me.
Please make this following changes:
Add android:fitsSystemWindows="true" to <androidx.drawerlayout.widget.DrawerLayout>
In your MainActivity override onSupportNavigateUp() method
Initialize data Binding like this:
val binding = DataBindingUtil.setContentView<ActivityMainBinding>(this, R.layout.activity_main)
Also there is no need for this code. Please remove it. As all the navigation should be managed by navigation graph.
if (savedInstanceState == null) { supportFragmentManager.beginTransaction() .replace(R.id.container, EggTimerFragment.newInstance()) .commitNow() }
I understand the Android Guide is too brief but you can refer to this particular section: Add a navigation drawer
Iv been stuck in trying to add the Navigation Component to my app. Specifically to my toolbar menu items.
I have been following the navigation migrate documentation on Android's site but I am getting a but confused on how it works or even to set it up.
This is a single-activity multi-fragment architecture.
The app would start in the MainFragment and then when tapping the menu items in the toolbar, such as Main Frag to Search Movie Frag. The user would be able to navigate using the menu items from anywhere in the app (e.g. if they click the home icon, they should be sent to the home screen form anywhere in the app. Still thinking if thats how it should be done).
The main thing is I don't know how to properly attach the Navigation Component to the menu items.
App
Nav Graph
nav_graph.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/nav_graph"
app:startDestination="#id/mainFragment">
<fragment
android:id="#+id/mainFragment"
android:name="com.example.movieapp.ui.main.MainFragment"
android:label="MainFragment">
<action
android:id="#+id/action_mainFragment_to_searchMovieFragment"
app:destination="#id/searchMovieFragment" />
</fragment>
<fragment
android:id="#+id/searchMovieFragment"
android:name="com.example.movieapp.ui.search.SearchMovieFragment"
android:label="SearchMovieFragment" />
</navigation>
main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".activity.MainActivity">
<include
layout="#layout/appbar"
android:id="#+id/mainToolBar"/>
<androidx.fragment.app.FragmentContainerView
android:id="#+id/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#id/mainToolBar"
app:layout_constraintBottom_toBottomOf="parent"
app:defaultNavHost="true"
app:navGraph="#navigation/nav_graph" />
</androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.kt
class MainActivity : AppCompatActivity() {
private lateinit var toolbar: Toolbar
private val navController by lazy {
(supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment).navController
}
private lateinit var appBarConfiguration: AppBarConfiguration
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.main_activity)
toolbar = findViewById(R.id.mainToolBar)
setSupportActionBar(toolbar)
appBarConfiguration = AppBarConfiguration(navController.graph, null)
setupActionBarWithNavController(navController, appBarConfiguration)
}
override fun onCreateOptionsMenu(menu: Menu?): Boolean {
val inflater: MenuInflater = menuInflater
inflater.inflate(R.menu.main_menu_bar, menu)
return true
}
override fun onSupportNavigateUp(): Boolean {
return navController.navigateUp(appBarConfiguration) || super.onSupportNavigateUp()
}
}
MainFragment.kt
class MainFragment : Fragment() {
companion object {
fun newInstance() = MainFragment()
}
private lateinit var viewModel: MainViewModel
private lateinit var binding: MainFragmentBinding
private lateinit var navController: NavController
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
binding = DataBindingUtil.inflate(inflater, R.layout.main_fragment, container, false)
setHasOptionsMenu(true)
return binding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
navController = Navigation.findNavController(view)
// navController.navigate(R.id.action_mainFragment_to_searchMovieFragment)
}
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
viewModel = ViewModelProvider(this).get(MainViewModel::class.java)
binding.viewModel = viewModel
// TODO: Use the ViewModel
}
}
main_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<data>
<variable
name="viewModel"
type="com.example.movieapp.ui.main.MainViewModel" />
</data>
<LinearLayout
android:orientation="vertical"
android:id="#+id/main_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.main.MainFragment">
<TextView
android:id="#+id/message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MainFragment1" />
</LinearLayout>
</layout>
The id for a menu item in your file main_menu_bar.xml needs to match the id for the destination(fragment) specified in your navigation graph (nav_graph.xml).
Your main_menu_bar.xml should look something like this:
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:showIn="navigation_view">
<group android:checkableBehavior="single">
<item
android:id="#id/searchMovieFragment"
android:icon="#drawable/search"
android:title="#string/menu_search" />
<item
android:id="#id/mainFragment"
android:icon="#drawable/ic_menu_camera"
android:title="#string/menu_home" />
</group>
</menu>
Also, you need to override the onOptionsItemSelected(MenuItem) method and associate your menu items with destinations. Like so:
override fun onOptionsItemSelected(item: MenuItem): Boolean {
val navController = findNavController(R.id.nav_host_fragment)
return item.onNavDestinationSelected(navController) || super.onOptionsItemSelected(item)
}
Reference
You can add a Toolbar on top of the most basic FragmentContainerView, access this toolbar from other fragments, and change the toolbar I created separately according to the fragment in it while opening the relevant fragment as follows.
toolbar = requireActivity().findViewById(R.id.toolbar_base)
toolbar?.menu?.clear()
toolbar?.title = ""
val toolbarFlowFragment = context?.let { getInflateLayout(it, R.layout.toolbar_profile) }
toolbar?.addView(toolbarFlowFragment)
I'm having some trouble to add options menu on a single fragment because it's breaking the navigation Up. Here my code
I have an single Activity with NoActionBar style and with this layout
<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"
android:fitsSystemWindows="true"
tools:context=".ui.MainActivity">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white">
<fragment
android:id="#+id/mainNavigationFragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:navGraph="#navigation/main_graph" />
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/appbarLayout"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="top">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize" />
</com.google.android.material.appbar.AppBarLayout>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
app:labelVisibilityMode="labeled"
app:menu="#menu/main_bottom_nav" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</layout>
in activity onCreate I make this setup for navigation
private fun setupNavigation() {
val navController = findNavController(R.id.mainNavigationFragment)
//each fragment of botton nav
val appBarConfiguration = AppBarConfiguration(setOf(
R.id.actionSchedule,
R.id.actionPayment,
R.id.actionNotification,
R.id.actionAccount))
toolbar.setupWithNavController(navController, appBarConfiguration)
bottomNavigationView.setupWithNavController(navController)
}
override fun onSupportNavigateUp() =
findNavController(R.id.mainNavigationFragment).navigateUp()
on each botton nav fragment I have some destinations and everything work as expected.
Now I need to add an menu only on right most fragment of botton nav, then on this specific fragment I add setHasOptionsMenu(true) in onCreate and inflate menu in onCreateOptionsMenu, but the menu does not appear.
Then I add setSupportActionBar(toolbar) on activity onCreate.
Now the menu appear only on this fragment but it's broke all 'UP' (back arrow on toolbar) of any destination (the back arrow appears, but when i press nothing happens). If I remove setSupportActionBar(toolbar) of activity the UP work again but not the toolbar menu.
What I need to do to make the menu work only in one fragment without broke anything else?
Thanks
If you're using setSupportActionBar, you must use setupActionBarWithNavController(), not toolbar.setupWithNavController as per the documentation.
if using toolbar do this:
in Acitvity:
class MyActivity : AppCompatActivity() {
private var currentNavController: NavController? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_my)
currentNavController = findNavController(R.id.settingNavHost)
currentNavController?.let {
val appBarConfiguration = AppBarConfiguration
.Builder()
.setFallbackOnNavigateUpListener {
onBackPressed()
true
}.build()
setSupportActionBar(toolbar)
toolbar.setupWithNavController(it, appBarConfiguration)
}
}
}
and in fragment:
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
setHasOptionsMenu(true)
}
override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
super.onCreateOptionsMenu(menu, inflater)
inflater.inflate(R.menu.my_menu, menu)
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
if (item.itemId == R.id.action_save) {
saveInfo()
}
return super.onOptionsItemSelected(item)
}
I'm having some trouble to add options menu on a single fragment because it's breaking the navigation Up. Here my code
I have an single Activity with NoActionBar style and with this layout
<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"
android:fitsSystemWindows="true"
tools:context=".ui.MainActivity">
<androidx.coordinatorlayout.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white">
<fragment
android:id="#+id/mainNavigationFragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:navGraph="#navigation/main_graph" />
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/appbarLayout"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="top">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize" />
</com.google.android.material.appbar.AppBarLayout>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
app:labelVisibilityMode="labeled"
app:menu="#menu/main_bottom_nav" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
</layout>
in activity onCreate I make this setup for navigation
private fun setupNavigation() {
val navController = findNavController(R.id.mainNavigationFragment)
//each fragment of botton nav
val appBarConfiguration = AppBarConfiguration(setOf(
R.id.actionSchedule,
R.id.actionPayment,
R.id.actionNotification,
R.id.actionAccount))
toolbar.setupWithNavController(navController, appBarConfiguration)
bottomNavigationView.setupWithNavController(navController)
}
override fun onSupportNavigateUp() =
findNavController(R.id.mainNavigationFragment).navigateUp()
on each botton nav fragment I have some destinations and everything work as expected.
Now I need to add an menu only on right most fragment of botton nav, then on this specific fragment I add setHasOptionsMenu(true) in onCreate and inflate menu in onCreateOptionsMenu, but the menu does not appear.
Then I add setSupportActionBar(toolbar) on activity onCreate.
Now the menu appear only on this fragment but it's broke all 'UP' (back arrow on toolbar) of any destination (the back arrow appears, but when i press nothing happens). If I remove setSupportActionBar(toolbar) of activity the UP work again but not the toolbar menu.
What I need to do to make the menu work only in one fragment without broke anything else?
Thanks
If you're using setSupportActionBar, you must use setupActionBarWithNavController(), not toolbar.setupWithNavController as per the documentation.
if using toolbar do this:
in Acitvity:
class MyActivity : AppCompatActivity() {
private var currentNavController: NavController? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_my)
currentNavController = findNavController(R.id.settingNavHost)
currentNavController?.let {
val appBarConfiguration = AppBarConfiguration
.Builder()
.setFallbackOnNavigateUpListener {
onBackPressed()
true
}.build()
setSupportActionBar(toolbar)
toolbar.setupWithNavController(it, appBarConfiguration)
}
}
}
and in fragment:
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
setHasOptionsMenu(true)
}
override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
super.onCreateOptionsMenu(menu, inflater)
inflater.inflate(R.menu.my_menu, menu)
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
if (item.itemId == R.id.action_save) {
saveInfo()
}
return super.onOptionsItemSelected(item)
}