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BottomNavigationBar not working properly after navigate to navigation fragment by cutom button click

Take a Bottom Navigation activity from android studio template. there are 3 fragment with 3 item in BottomNavBar (HomeFragment, DashboardFragment, NotificationsFragment) navigate to DashboardFragment from HomeFragment by a button click. after that home item click from BottomNavBar should open Homefragment. But not working as expected.
Go to DashboardFrament from HomeFrament by
textView.setOnClickListener {
findNavController().navigate(R.id.navigation_dashboard)
}
MainActivity.kt
class MainActivity : AppCompatActivity() {
private lateinit var binding: ActivityMainBinding
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)
navView.setupWithNavController(navController)
}
}
main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="?attr/actionBarSize">
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/nav_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="0dp"
android:layout_marginEnd="0dp"
android:background="?android:attr/windowBackground"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="#menu/bottom_nav_menu" />
<fragment
android:id="#+id/nav_host_fragment_activity_main"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:layout_constraintBottom_toTopOf="#id/nav_view"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="#navigation/mobile_navigation" />
</androidx.constraintlayout.widget.ConstraintLayout>
HomeFramgent.kt
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val textView: TextView = view.findViewById(R.id.text_home)
textView.setOnClickListener {
findNavController().navigate(R.id.navigation_dashboard)
}
}
navigation.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/mobile_navigation"
app:startDestination="#+id/navigation_home">
<fragment
android:id="#+id/navigation_home"
android:name="com.app.bottomnav.ui.home.HomeFragment"
android:label="#string/title_home"
tools:layout="#layout/fragment_home" />
<fragment
android:id="#+id/navigation_dashboard"
android:name="com.app.bottomnav.ui.dashboard.DashboardFragment"
android:label="#string/title_dashboard"
tools:layout="#layout/fragment_dashboard" />
<fragment
android:id="#+id/navigation_notifications"
android:name="com.app.bottomnav.ui.notifications.NotificationsFragment"
android:label="#string/title_notifications"
tools:layout="#layout/fragment_notifications" />
</navigation>

Whenever you are navigating to any root destination from another fragment, you should have to clear the previous stack using popUpTo option builder.
Update your code navigation code in your home fragment.
findNavController()
.navigate(R.id.navigation_dashboard,
null,
NavOptions.Builder()
.setPopUpTo(R.id.navigation_home, true)
.build()
)

I don't know what is the best solution for that problem but here is a workaround:
In your activity you add public method:
fun navigateToNavBarDestination(destinationId: Int) {
binding.navView.setSelectedItemId(destinationId)
}
And in your fragments referenced in BottomNavigationView instead calling NavController::navigate you navigate in that way, lets say to dashboard:
fun navigateToDashboard() {
(activity as? MainActivity)?.navigateToNavBarDestination(R.id.dashboard)
}
Its not the perfect solution but works.

Add these lines in your MainActivity onCreate.
val appBarConfiguration = AppBarConfiguration(
setOf(
R.id.navigation_home,
R.id.navigation_dashboard,
R.id.navigation_notifications
))
setupActionBarWithNavController(navController, appBarConfiguration)

How to enable navigation drawer only when we are in a certain fragment?

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
}
}

Android, back button navigation with FragmentContainerView close the app instead of going to the previous fragment [duplicate]

This question already has answers here:
android navigation component up button, arrow displays but popTo not working
(2 answers)
Closed 1 year ago.
I have an AppCompatActivity with a FragmentContainerView and a BottomNavigationView.
When I navigate from a fragment_A to the fragment_B(which are not in the bottom menu) a back button appears, the problem is that the back button closes the app instead of going back to the previous fragment_A.
My activity xml:
<?xml version="1.0" encoding="utf-8"?>
<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:id="#+id/constraintLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:liftOnScroll="true">
<com.google.android.material.appbar.MaterialToolbar
android:id="#+id/homeToolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways|snap" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.fragment.app.FragmentContainerView
android:id="#+id/nav_host_fragment_activity_home"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="0dp"
android:layout_height="0dp"
app:defaultNavHost="true"
app:layout_constraintBottom_toTopOf="#+id/nav_view"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/appBarLayout"
app:navGraph="#navigation/mobile_navigation" />
<com.google.android.material.bottomnavigation.BottomNavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_gravity="bottom"
app:layout_behavior=".ui.behaviour.TestBehavior"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="#menu/bottom_nav_menu" />
</androidx.constraintlayout.widget.ConstraintLayout>
And this is the kotlin code:
class HomeActivity : AppCompatActivity() {
private lateinit var binding: ActivityHomeBinding
private val viewModel: HomeActivityViewModel by viewModels()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityHomeBinding.inflate(layoutInflater)
setContentView(binding.root)
setSupportActionBar(binding.homeToolbar)
val navView: BottomNavigationView = binding.navView
val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment_activity_home) as NavHostFragment
val navController = navHostFragment.navController
// 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_fragment_a,
R.id.navigation_notifications
)
)
setupActionBarWithNavController(navController, appBarConfiguration)
navView.setupWithNavController(navController)
}
}
This is the action xml:
<action
android:id="#+id/navigate_to_fragment_b"
app:destination="#id/fragment_b"
app:enterAnim="#anim/slide_in_right"
app:exitAnim="#anim/slide_out_left"
app:popEnterAnim="#anim/slide_in_right"
app:popExitAnim="#anim/slide_out_left" />
This the code I use to obtain the navController reference:
val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment_activity_home) as NavHostFragment
val navController = navHostFragment.navController
And this is the navigation function that i call from the fragment_A:
navController.navigate(R.id.navigate_to_fragment_b)
I tried to override the onBackPressed() in my activity but it's never gets called.
Update
I have confused the back button with the up button.
In my case back button returns to previous fragment but up button close the app.
So my problem is with the UP BUTTON.
UP button appears only when I navigate to the fragment_B, and referring to this I would say that there is something that does not work because it closes the app for me.
The Up button never exits your app
If a user is at the app's start destination, then the Up button does not appear, because the Up button never exits the app. The Back button, however, is shown and does exit the app.

Thanks to ianhanniballake for the solution in this answer
// Java
#Override
public boolean onSupportNavigateUp() {
return Navigation.findNavController(this, R.id.main_fragment).navigateUp()|| super.onSupportNavigateUp();
}
// Kotlin
override fun onSupportNavigateUp(): Boolean {
return Navigation.findNavController(this, R.id.main_fragment).navigateUp() || super.onSupportNavigateUp()
}

Add back arrow to fragment with Navigation Component

I implemented a basic Navigation component on an app that consist of a MainActivity that holds a Toolbar (that I have added to have the back arrow functionality) and a fragment container which starts with Fragment A. In this fragment I have a button which redirects to a blank Fragment B.
I can return to fragment A (from fragment B) from the bottom Android navigation using Navigation component, but I want to do the same using the back arrow from the toolbar that I have added.
I implemented the arrow putting setSupportActionBar(findViewById(R.id.toolbar)) in Main Activity and (activity as AppCompatActivity).supportActionBar?.setDisplayHomeAsUpEnabled(true) on Fragment B, but when I tap it it doesn't redirect to Fragment A because (I suppose) that the back stack is empty.
MainActivity
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
setSupportActionBar(findViewById(R.id.toolbar))
}
MainActivity xml
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="?attr/actionBarTheme"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<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:defaultNavHost="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/toolbar"
app:navGraph="#navigation/nav_graph" />
FragmentB
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
(activity as AppCompatActivity).supportActionBar?.setDisplayHomeAsUpEnabled(true)
}
Added this to remove the default toolbar in styles.xml
<item name="windowNoTitle">true</item>
In FragmentB up button not working
fragmentB with back not working
I want to do that using Navigation Component, any ideas?
Thanks.

Thanks to #MustafaKhaled I could find the correct documentation that is in this link
I deleted setDisplayHomeAsUpEnabled of fragmentB (you don't need to add anything in this fragment).
I leave as it is the code of styles.xml.
My new MainActivity is like this:
private lateinit var toolbar: Toolbar
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
toolbar = findViewById(R.id.toolbar)
setupNavigation()
}
private fun setupNavigation() {
val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
val navController = navHostFragment.navController
val appBarConfiguration = AppBarConfiguration.Builder(navController.graph).build()
toolbar.setupWithNavController(navController, appBarConfiguration)
}
Following this way you manage the toolbar behavior through the Navigation-UI feature.
UPDATE 28/04/20
There is an approach simpler than this that doesn't need a toolbar because uses the default one.
MainActivity
class MainActivity : AppCompatActivity() {
private lateinit var appBarConfiguration: AppBarConfiguration
private lateinit var navController: NavController
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
setupNavigation()
}
private fun setupNavigation() {
val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
navController = navHostFragment.navController
appBarConfiguration = AppBarConfiguration.Builder(navController.graph).build()
setupActionBarWithNavController(navController, appBarConfiguration)
}
override fun onSupportNavigateUp(): Boolean {
return navController.navigateUp(appBarConfiguration)
|| super.onSupportNavigateUp()
}
}
activity_main.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:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="#+id/nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="0dp"
android:layout_height="0dp"
app:defaultNavHost="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="#navigation/nav_graph" />
And my styles.xml file is like the default one:
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
The updated repo link

In your MainActivity
setup your navigation:
private fun setupNavigation() {
val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment?
navController = navHostFragment!!.navController
appBarConfiguration = AppBarConfiguration.Builder(setOf(R.id.checklocation,R.id.questions,R.id.news,R.id.profile_tab)).build()
NavigationUI.setupWithNavController(bottomNavigation,navController)
NavigationUI.setupActionBarWithNavController(this,navController)
}
to enable back arrow be shown and shows the previous destination override this function
override fun onSupportNavigateUp(): Boolean {
return navController.navigateUp()
}
By the way, using navigation component with bottom navigation, we don't have to configure your toolbar, this will be handled by adding above dunctions in your MainActivity.

Jetpack navigation: Title and back/up arrow in the action bar?

I have installed the latest canary version of Android Studio, and followed this (https://developer.android.com/topic/libraries/architecture/navigation/navigation-implementing) instruction to implement a simple two page navigation. Basically page1 has a button, and when it is clicked, the app shows page2.
It works, but there is one problem... It does not seem to do anything with the action bar automatically. Is it supposed to show up/back arrow and the "Label" attribute on the action bar automatically by the navigation library? Or am I supposed to do all the work manually as before? I want to show the back arrow and "Details" on action(tool) bar when page2 is showing.
On button click at page 1.
override fun onViewCreated(view: View, savedInstanceState: Bundle?)
{
button1.setOnClickListener {
val nav = NavHostFragment.findNavController(this);
nav.navigate(R.id.show_page2)
}
}
Main activity XML. By default it was the default Action Bar, I have replaced it with a ToolBar. There was no difference.
<?xml version="1.0" encoding="utf-8"?>
<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=".MainActivity">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_height="?attr/actionBarSize"
android:elevation="4dp"
android:background="?attr/colorPrimary"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
android:layout_width="match_parent">
</androidx.appcompat.widget.Toolbar>
<fragment
android:id="#+id/my_nav_host_fragment"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="0dp"
android:layout_height="0dp"
app:defaultNavHost="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/toolbar"
app:navGraph="#navigation/nav_graph"/>
</androidx.constraintlayout.widget.ConstraintLayout>
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/page1">
<activity
android:id="#+id/mainActivity2"
android:name="com.android.navtest.MainActivity"
android:label="activity_main"
tools:layout="#layout/activity_main"/>
<fragment
android:id="#+id/page1"
android:name="com.android.navtest.BlankFragment2"
android:label="Home page"
tools:layout="#layout/page1">
<action
android:id="#+id/show_page2"
app:destination="#id/page2"
app:enterAnim="#anim/anim1"
app:popExitAnim="#anim/anim2"/>
</fragment>
<fragment
android:id="#+id/page2"
android:name="com.android.navtest.BlankFragment"
android:label="Details"
tools:layout="#layout/page2"/>
</navigation>

You can connect your ActionBar to a NavController using NavigationUI.setupActionBarWithNavController(). This is generally done in your Activity, right after you call setSupportActionBar():
supportActionBar = findViewById<Toolbar>(R.id.toolbar)
// Get the NavController for your NavHostFragment
val navController = findNavController(R.id.nav_host_fragment)
// Set up the ActionBar to stay in sync with the NavController
setupActionBarWithNavController(navController)
This approach is covered in the Navigation talk at Google I/O 2018.

If you want to have navigation back button hidden in more than one place (default is only for home fragment) you can add ids of fragments to AppBarConfiguration and pass this as second parameter of setupActionBarWithNavController, for example:
val appBarConfiguration = AppBarConfiguration(setOf(R.id.splashFragment, R.id.onboardingFragment, R.id.homeFragment))
setupActionBarWithNavController(findNavController(R.id.nav_host), appBarConfiguration)

This is what I have done.
onSupportNavigateUp is called when the user navigates up and it set again. by calling this setupActionBarWithNavController tell android to update the title of toolbar.
navigateUp Handles the Up button by delegating its behavior to the given NavController. This should generally be called from AppCompatActivity.onSupportNavigateUp().
private lateinit var appBarConfiguration: AppBarConfiguration
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val binding: ActivityGameConfigBinding =
DataBindingUtil.setContentView(this, R.layout.activity_game_config)
supportActionBar?.show()
val navController = Navigation.findNavController(this, R.id.myNavHostFragment)
NavigationUI.setupActionBarWithNavController(this, navController, null)
appBarConfiguration = AppBarConfiguration.Builder(navController.graph)
.build()
NavigationUI.setupWithNavController(binding.navView, navController)
}
override fun onSupportNavigateUp(): Boolean {
val navController = Navigation.findNavController(this, R.id.myNavHostFragment)
return NavigationUI.navigateUp(navController, appBarConfiguration)
}

my solution with binding - the code is in MainActivity
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = DataBindingUtil.setContentView(this, R.layout.main_activity)
navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
navController = navHostFragment.navController
setSupportActionBar(toolbar)//needs to be after binding
toolbar.setupWithNavController(navController,AppBarConfiguration(navController.graph))
}
as for the titles - first I removed labels (android:label) from the fragments in navigation graph (label overwrites title from what I've tested)
<fragment
android:id="#+id/productListFragment"
android:name="com.example.ProductListFragment"
android:label="TO_BE_REMOVED"
tools:layout="#layout/product_list_fragment">
<action
android:id="#+id/action_productListFragment_to_mainMenuFragment"
app:destination="#id/mainMenuFragment" />
</fragment>
each fragment sets the title and subtitle in onResume, here example from ProductListFragment
override fun onResume() {
super.onResume()
val actionBar = (activity as AppCompatActivity).supportActionBar
actionBar?.title = getString(R.string.product_list_title)
actionBar?.subtitle = getString(R.string.product_list_subtitle)
}