What I'm trying to do
I am using Android Navigation component to handle navigation in my app. In this example, I have two screens, screen A and screen B.
I want the user to be able to click a button in screen A and be able to navigate to screen B; and then be prevented from going back to the previous screen (screen A).
The problem
When the user navigates to screen B from screen A, the back button on the action bar still allows the user to go back to the previous screen, however when clicking on the back button in the bottom bar it exits the app so this part works OK.
What do I need to do in order to remove the back button in the Action Bar?
What I've read so far
I have followed the guidance within these three articles but I think they might be ignoring the ActionBar's back button:
Stackoverflow - How to clear navigation Stack after navigating to
another fragment in Android
Android Developer Guide - Conditional navigation
Android Developer Guide - Navigate to a destination
My Code
Navigation 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"
android:id="#+id/nav_graph"
app:startDestination="#id/screen_a">
<fragment
android:id="#+id/screen_a"
android:name="com.example.conditionalnavigation.AFragment"
android:label="screen A">
<action
android:id="#+id/action_AFragment_to_BFragment"
app:destination="#id/screen_b"
app:launchSingleTop="true"
app:popUpTo="#id/screen_a"
app:popUpToInclusive="true" />
</fragment>
<fragment
android:id="#+id/screen_b"
android:name="com.example.conditionalnavigation.BFragment"
android:label="screen B" />
</navigation>
MainActivity - This acts as my Single Activity navhost.
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
DataBindingUtil.setContentView<ActivityMainBinding>(this, R.layout.activity_main)
val navController = this.findNavController(R.id.myNavHostFragment)
NavigationUI.setupActionBarWithNavController(this, navController)
}
override fun onSupportNavigateUp(): Boolean {
val navController = this.findNavController(R.id.myNavHostFragment)
return navController.navigateUp()
}
}
In your activity class add the following member (in Kotlin):
private lateinit var appBarConfiguration: AppBarConfiguration
Inside the onCreate method add the following lines:
....
val drawerLayout: DrawerLayout = findViewById(R.id.drawer_layout)
...
...
appBarConfiguration = AppBarConfiguration(
setOf([**ID of the fragment layout you want without back button**],
), drawerLayout
)
setupActionBarWithNavController(navController, appBarConfiguration)
navView.setupWithNavController(navController)
....
In this way your fragment will be a root fragment and the back button is removed. Hope it helps.
Try to disable home button at the creation of screen b fragment:
override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? {
var rootView = inflater?.inflate(R.layout.fragment_screen_b, container, false)
(activity as AppCompatActivity).supportActionBar!!.setDisplayHomeAsUpEnabled(false)
return rootView
}
If it didn't work, then try it in onViewCreated() method.
If not worked, try to add below as well:
setHasOptionsMenu(false)
Related
I am using the latest Navigation version 2.4.2.
I set up the bottom nav bar with the Navigation component as follow, the same way recommended by google:
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)
// 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_home, R.id.navigation_dashboard, R.id.navigation_notifications
)
)
setupActionBarWithNavController(navController, appBarConfiguration)
navView.setupWithNavController(navController)
}
My menu:
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/navigation_home"
android:icon="#drawable/ic_home_black_24dp"
android:title="#string/title_home" />
<item
android:id="#+id/navigation_dashboard"
android:icon="#drawable/ic_dashboard_black_24dp"
android:title="#string/title_dashboard"
xmlns:app="http://schemas.android.com/apk/res-auto" />
<item
android:id="#+id/navigation_notifications"
android:icon="#drawable/ic_notifications_black_24dp"
android:title="#string/title_notifications" />
However, when I navigate from one fragment to the other, its onDestroy() is called and when I navigate back to it is recreated.
This is the case for all the fragment in the BottomNavView except the startDestination. The onCreate() for the startDestination is called only once and when navigating away from it, only the onDestroyView() is called. I want this behavior for all the other fragments as well as I need to put code in the onCreate() method and want it to run once once per lifecycle of the app.
Support for multiple backstack arrive with Navigation 2.4.0 so I don't know what's wrong. when calling findNavController.navigate(...), the previous fragment is kept in the backstack and is not destroyed(), and as far as I know the BottomNavBar calls the same method so I can't figure out why each fragment is being created/destroyed upon each navigation.
Me navigating from : Start Fragment -> Dashboard Fragment -> Navigation Fragment -> Start Fragment
All the fragment except the Start Fragment is recreated.
Any help is appreciated.
For anyone looking for an answer to this question. Google replied that it is expected behaviour.
https://issuetracker.google.com/issues/190893266
I have two activities, one holds all the fragments for the Login process, and the other one holds all the fragments for the main app.
Let's say I want to navigate from Activity1 (that holds all navigation graph of Login) to Activity2 (That holds all the navigation graph for the main app)
class LoginActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_login)
}
fun goToMainActivity(){
startActivity(Intent(this,MainActivity::class.java))
finish()
}
}
Here I call the method goToMainActivity()
class LoginFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
return inflater.inflate(R.layout.fragment_login,container,false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
btn_go.setOnClickListener {
// call the method goToMainActivity() to kill all fragments contained by that Activity and move foward to MainActivity with another nav_graph
}
}
}
Since LoginActivity holds a nav_graph and is the navigation host for all the Login Fragments, now I want to kill all the fragments contained to LoginActivity and move towards a new Activity (MainActivity) that holds a different nav graph
Is this the good way to do it? Or I should navigate differently ?
You don't need to define a second activity, simply add a second navigation graph to your nav_graph.xml file. Something like:
<?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/loginFragment">
<fragment
android:id="#+id/loginFragment"
android:name="com.mycompany.loginFragment"
tools:layout="#layout/fragment_login"
android:label="Login" >
<action
android:id="#+id/action_loginFragment_to_new_graph"
app:destination="#id/new_graph" />
</fragment>
<include app:graph="#navigation/new_graph" />
</navigation>
Then, with your navController, navigate the action:
navController.navigate(R.id.action_loginFragment_to_new_graph)
You can migrate to a single Activity Navigation. In your Nav Graph add an Action to navigate between the last LoginFragemnt and MainFragment and select:
Pop Behaviour:
Pop To - Self
Inclusive - YES
This should automatically clear the stack for you and pressing back will close the App.
EDIT:
Or just manually add these two lines to your nav xml under the action that moves from the LoginFragment to the MainFragment:
app:popUpTo="#id/loginFragment"
app:popUpToInclusive="true"
I am currently using bottom navigation like in navigation advanced example, I am trying direct user to signup flow if user is not authenticated. I use following code in side defaultly selected fragment to direct user to sign up flow (login_nav_graph) if they are not authenticated.
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
if(!authenticated){
view.findNavController().navigate(R.id.action_frag1Fragment_to_login_nav_graph)
}
}
But there are few problems
Shows back button when user in signup flow
Bottom navigation is shown in signup flow
These problems make sense, Reasons:
since signup flow (login_nav_graph) is nested inside bottom navs first items(defaultly selected) navigation graph.
Bottom nav is on activity_main layout.
So how could I integrate signup flow into navigation advanced example and overcome above mentioned issues with a better approach?
Note:
code is very similar to navigation advanced example, I introduced separate nav graph for signup flow called login_nav_graph and above mentioned code in defautly selected fragment
Fixed the issue by doing following.
Add login_nav_graph to the nav graph which contains defaultly selected fragment as a nested nav graph.
Create an action/path from defaultly selected fragment (frag1Fragment) to the login_nav_graph and set the Pop To behavior of the action to the frag1Fragment's nav graph.
Create following two methods inside the MainActivity in order to toggle the visibility of the action bar and bottom nav.
fun toggleBottomNavVisibility(){
if(bottom_nav.visibility == View.VISIBLE){
bottom_nav.visibility = View.GONE
}else{
bottom_nav.visibility = View.VISIBLE
}
}
...
fun toggleActionBarVisibility(){
if(supportActionBar!!.isShowing){
supportActionBar?.hide()
}
else{
supportActionBar?.show()
}
}
Update the onViewCreated method of the frag1Fragment as follows
...
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
if(!authenticated){
// hide bottom navigation and action bar
val activity = activity as MainActivity
activity.toggleBottomNavVisibility()
activity.toggleActionBarVisibility()
findNavController().navigate(R.id.action_frag1Fragment_to_login_nav_graph)
}
}
I am creating a game where the user goes through a series of 5 screens. At the last screen, the user has the choice to end the game, at which point they are taken back to the starting screen. My problems come in when a user ends the game and then starts again. While navigating through the app, the navigation host fragment cannot be found.
The first time through the app, it navigates at usual, but the second time, the navigation host cannot be found.
I have tried using different views to find the navigation host, and while debugging, I saw that for the fragment where it can not be found, the parent is equal to null.
This is where I navigate, in the fragments onViewCreated()
viewModel.getGameUpdates().observe(activity!!, Observer { updatedGame ->
if(updatedGame.playerList.size == 0){
Log.d("END","END")
viewModel.endGame()
}
adapter?.players = updatedGame.playerList
if(updatedGame.started){
Navigation.findNavController(view).navigate(R.id.action_waitingFragment_to_gameFragment)
}
})
and this is the moment where the user clicks to navigate back to the first screen:
btn_end_game.setOnClickListener {
viewModel.endGame()
timer.cancel()
Navigation.findNavController(view).navigate(R.id.action_gameFragment_to_startFragment)
}
The layout for my MainActivity that holds the navigation host fragment is:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<fragment
android:id="#+id/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:defaultNavHost="true"
app:navGraph="#navigation/nav_graph" />
</FrameLayout>
I do realize that I am just adding on top of the back stack when I would rather pop back to the first fragment. I am just lost as to how the fragment is null.
The following is the 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"
android:id="#+id/nav_graph" app:startDestination="#id/startFragment">
<fragment android:id="#+id/startFragment" android:name="com.dangerfield.spyfall.start.StartFragment"
android:label="StartFragment">
<action android:id="#+id/action_startFragment_to_joinGameFragment" app:destination="#id/joinGameFragment"/>
<action android:id="#+id/action_startFragment_to_newGameFragment" app:destination="#id/newGameFragment"/>
</fragment>
<fragment android:id="#+id/newGameFragment" android:name="com.dangerfield.spyfall.newGame.NewGameFragment"
android:label="NewGameFragment">
<action android:id="#+id/action_newGameFragment_to_waitingFragment" app:destination="#id/waitingFragment"/>
</fragment>
<fragment android:id="#+id/joinGameFragment" android:name="com.dangerfield.spyfall.joinGame.JoinGameFragment"
android:label="JoinGameFragment">
<action android:id="#+id/action_joinGameFragment_to_waitingFragment" app:destination="#id/waitingFragment"/>
</fragment>
<fragment android:id="#+id/waitingFragment" android:name="com.dangerfield.spyfall.waiting.WaitingFragment"
android:label="WaitingFragment">
<action android:id="#+id/action_waitingFragment_to_gameFragment" app:destination="#id/gameFragment"/>
<action android:id="#+id/action_waitingFragment_to_startFragment" app:destination="#id/startFragment"/>
</fragment>
<fragment android:id="#+id/gameFragment" android:name="com.dangerfield.spyfall.game.GameFragment"
android:label="GameFragment">
<action android:id="#+id/action_gameFragment_to_startFragment" app:destination="#id/startFragment"/>
</fragment>
</navigation>
This is the message given after crash:
java.lang.IllegalStateException: View android.widget.ScrollView{637e4ce VFED.V... ......ID 0,0-1440,2308} does not have a NavController set
LiveData remembers the current data and will automatically redeliver it when the observer becomes started again, making it inappropriate for events that trigger navigation operations: your operation to navigate() is going to be triggered every time your Fragment is started, making it impossible to actually pop back to that Fragment.
Note that Fragments are not destroyed while on the back stack. If you're changing the underlying data that your Fragment relies on while that Fragment is on the back stack, you should use the viewLifecycleOwner instead of this (representing the Fragment) for your LifecycleOwner passed to observe() when observing in onViewCreated(). This ensures that you will no longer get observer callbacks once your view is destroyed (i.e., you go onto the back stack).
activity!! is absolutely always wrong to use as the LifecycleOwner from within a Fragment, since that means the observer will not be cleaned up even if the Fragment is completely destroyed (it'll only be cleaned up when the activity is destroyed).
As per the conditional navigation documentation, the recommended approach is to ensure that your LiveData is tracking state rather than events. That way, after you call navigate(), you can update the state to ensure that when the callback happens a second time, you don't call navigate() a second time. This approach is recommended over the SingleLiveEvent approach.
Even I Was facing the same issue when I used to navigate from current fragment to the next fragment, and on the back press of hardware navHost would be null, The mistake I was doing is that I had made the variable navController global where I used to instantiate like this in onCreate()
Before:
class MainActivity : AppCompatActivity() {
private lateinit var binding: ActivityMainBinding
private lateinit var navController: NavController
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
navController = this.findNavController(R.id.myNavHostFragment)
NavigationUI.setupActionBarWithNavController(this,navController)
}
override fun onSupportNavigateUp(): Boolean {
return navController.navigateUp()
}
}
After:
now it's working after this change
class MainActivity : AppCompatActivity() {
private lateinit var binding: ActivityMainBinding
private lateinit var navController: NavController
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
navController = this.findNavController(R.id.myNavHostFragment)
NavigationUI.setupActionBarWithNavController(this,navController)
}
override fun onSupportNavigateUp(): Boolean {
val navController = this.findNavController(R.id.myNavHostFragment)
return navController.navigateUp()
}
}
Dont why navController would be null if made it global??
I'm currently using the Android Architecture Component's Navigation, but I'm running into an issue with my Navigation Drawer. It shows the hamburger menu when at my starting destination, but other Fragments are showing the up arrow. I believe I've setup my navigation_graph incorrectly.
Here you can see my nav drawer, showing 2 items, Home and Settings. When in either of these Fragments, you should see the Hamburger icon.
However, when navigating to the Settings Fragment, it shows the Up arrow.
navigation.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"
app:startDestination="#id/nav_home">
<!-- Start at HomeFragment -->
<fragment
android:id="#+id/nav_home"
android:name=".HomeFragment"
android:label="#string/home">
<!-- Navigate to the Search -->
<action
android:id="#+id/action_nav_home_to_nav_search"
app:destination="#id/nav_search" />
</fragment>
<fragment
android:id="#+id/nav_settings"
android:name=".SettingsFragment"
android:label="#string/settings">
<!-- Navigate to the Search -->
<action
android:id="#+id/action_nav_settings_to_nav_search"
app:destination="#id/nav_search" />
</fragment>
<fragment
android:id="#+id/nav_search"
android:name=".SearchFragment"
android:label="#string/search" />
</navigation>
I feel like HomeFragment and SettingsFragment should be related somehow but I'm not sure how to define that.
main_drawer.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:id="#id/nav_home"
android:icon="#drawable/ic_home_white_24dp"
android:title="#string/home" />
<item
android:id="#id/nav_settings"
android:icon="#drawable/ic_settings_white_24dp"
android:title="#string/settings" />
</group>
</menu>
MainActivity
And then within MainActivity, I just set it up like this. I called setupActionBarWithNavController, but I also have to actually setup the nav drawer myself, and handle the onNavigationItemSelected.
private fun setupNavigation() {
navController = findNavController(R.id.mainNavigationFragment)
setupActionBarWithNavController(this, navController, drawer_layout)
val toggle = ActionBarDrawerToggle(
this, drawer_layout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close)
drawer_layout.addDrawerListener(toggle)
toggle.syncState()
nav_view.setNavigationItemSelectedListener(this)
}
override fun onNavigationItemSelected(item: MenuItem): Boolean {
val current = navController.currentDestination.id
if (item.itemId != current) {
navController.navigate(item.itemId)
}
drawer_layout.closeDrawers()
return true
}
build.gradle
// Navigation
implementation 'android.arch.navigation:navigation-fragment-ktx:1.0.0-alpha04'
implementation 'android.arch.navigation:navigation-ui-ktx:1.0.0-alpha04'
Thanks.
In newer alphas (I have 1.0.0-alpha07) they added possibility to define topLevelDestinationIds when calling AppBarConfiguration constructor.
So I setup my NavController like this
val navController = findNavController(R.id.nav_host_fragment)
val config = AppBarConfiguration(
setOf(
R.id.fistTopFragment,
R.id.secondTopFragment,
...
),
dr.drawerLayout
)
tb.setupWithNavController(navController, config)
Where dr is MaterialDrawer and tb of course Toolbar.
Then it behaves more like Gmail, at least for the ActionBarDrawerToggle, the back stack is still preserved. Since I must handle item selection in MaterialDrawer by myself, I'm going to reduce back stack actions using global navigation actions with inclusive popTo to the root fragment of the navigation graph and use something like a "Welcome screen" for now.
Another way around could be custom handling of the onBackPressed.
You must remove app:defaultNavHost="true" from your host fragment in activity layout first. Something like this
override fun onBackPressed() {
val navController = findNavController(R.id.nav_host_fragment)
if (navController.currentDestination == null
|| navController.currentDestination!!.id in setOf(
R.id.fistTopFragment,
R.id.secondTopFragment,
...
)
) {
super.onBackPressed()
} else {
navController.navigateUp()
}
}
Sorry about the code, I'm still learning Kotlin, so there is probably much nicer way of doing this.
I am afraid it is a feature of navigation component.
The action bar will also display the Up button when you are on a non-root destination and the drawer icon when on the root destination, automatically animating between them.
If you want, you can try to use setupWithNavController(NavigationView, NavController) and handle the toolbar yourself.
I made simple example for this issue. Solution is almost same as Almighty's answer. https://github.com/isaul32/android-sunflower
Create set of top level destinations at first
val topLevelDestinations = setOf(R.id.garden_fragment,
R.id.plant_list_fragment)
appBarConfiguration = AppBarConfiguration.Builder(topLevelDestinations)
.setDrawerLayout(drawerLayout)
.build()
and then override onSupportNavigateUp function like this
override fun onSupportNavigateUp(): Boolean {
return NavigationUI.navigateUp(navController, appBarConfiguration)
}
Back arrow appearing on tab fragments associated with BottomNavigationView is an intended behaviour. However haven't seen it being used "as is" even in famous apps (Instagram, Youtube which have bottom tabs). If you navigate to different bottom tabs in Youtube app for example and click device back option, you'll notice it goes to previous tab fragment and not exit app. So bottomnavigationview tab fragments are not root destinations here.
Want to bring to notice additional important issues which you might encounter as you move forward:
It does not allow for reuse of fragments in combination with BottomNavigationView
https://issuetracker.google.com/issues/110373186
If you have multiple activities the up button does not navigate up to the previous activity
https://issuetracker.google.com/issues/79993862
However there are several hooks you can use to customise the behaviour:
onBackPressed - to close drawer layout if open
override fun onBackPressed() {
if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
drawerLayout.closeDrawer(GravityCompat.START)
} else {
super.onBackPressed()
}
}
Add navController.addOnNavigatedListener(..) and inside the listener customise HomeAsUpIndicator icon
Override onOptionsItemSelected to customise menu with id android.R.id.home action
Set custom fragment navigator to customise how your fragments are treated (replace or show/ hide)
navHostFragment = supportFragmentManager
.findFragmentById(R.id.my_nav_host_fragment) as NavHostFragment? ?: return
val customNavigator = CustomFragmentNavigator(navHostFragment.requireContext(),
navHostFragment.childFragmentManager, navHostFragment.id)
navHostFragment.navController.navigatorProvider.addNavigator(customNavigator)
val inflater = navHostFragment.navController.navInflater
val graph = inflater.inflate(R.navigation.main_nav_graph)
navHostFragment.navController.graph = graph
Remember navigation arch component is still in alpha, so use it wisely.
If you want, you can use NavController.OnNavigatedListener and use below code to set title.
#Override
public void onNavigated(#NonNull NavController controller, #NonNull NavDestination destination) {
mActivityBinding.toolbar.setTitle(destination.getLabel());
}
Remember to set label in your navigation graph.
I think your menu items should be like this:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#id/nav_home"
android:icon="#drawable/ic_home_white_24dp"
android:title="#string/home" />
<item
android:id="#id/nav_settings"
android:icon="#drawable/ic_settings_white_24dp"
android:title="#string/settings" />
</menu>
Hope this helps
Happy coding...
I completely agree with the sentiment here but it is a part of the library
setupActionBarWithNavController
Sets up the ActionBar returned by AppCompatActivity.getSupportActionBar() for use with a NavController.
By calling this method, the title in the action bar will automatically be updated when the destination changes (assuming there is a valid label).
The start destination of your navigation graph is considered the only top level destination. On the start destination of your navigation graph, the ActionBar will show the drawer icon if the given DrawerLayout is non null. On all other destinations, the ActionBar will show the Up button. Call navigateUp(NavController, DrawerLayout) to handle the Up button.
this to me is broken and not the desired result, so what i'm doing is still using it with the navigation view using
navController = Navigation.findNavController(this, R.id.nav_host);
NavigationUI.setupWithNavController(navigationView,navController);
and then having a listener to update the title and anything else i want changed like this
navController.addOnNavigatedListener((controller, destination) -> {
setToolbarColour(R.color.primary);
switch (destination.getId()){
case R.id.dashBoard :
setToolbarColour(android.R.color.transparent);
break;
case R.id.requests :
toolbar.setTitle(getString(R.string.request));
break;
}
});
I'm then creating a new navigation graph for each of these fragments, not great but i get my intended result