Develop Reference

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
}
}

navigation drawer with navigation component back arrow not show when drawer is open [duplicate]

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)
}

Kotlin Android Navigation Drawer item onclick listener does not working

I know this already asked many times, but in my case, I still don't get it.
So I have a navigation drawer that set up in the MainActivity.kt (My app has many fragment that runs on this Activity).
MainActivity.kt
class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {
lateinit var drawerLayout: DrawerLayout
lateinit var binding: ActivityMainBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val binding = DataBindingUtil.setContentView<ActivityMainBinding>(this, R.layout.activity_main)
drawerLayout = binding.drawerLayout
//Get navigation controller of this App
val navController = this.findNavController(R.id.myNavHostFragment)
//Lock the Nav drawer
drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED)
NavigationUI.setupActionBarWithNavController(this, navController, drawerLayout)
NavigationUI.setupWithNavController(binding.navView, navController)
}
override fun onNavigationItemSelected(item: MenuItem): Boolean {
when (item.itemId) {
R.id.nav_logout -> {
Toast.makeText(this, "Publication", Toast.LENGTH_SHORT).show()
Log.i("MainActivity", "Sign out clicked!")
}
R.id.nav_messages -> {
Toast.makeText(this, "Publication", Toast.LENGTH_SHORT).show()
}
}
binding.drawerLayout.closeDrawer(GravityCompat.START)
return true
}
// Set up the back button on action bar
override fun onSupportNavigateUp(): Boolean {
val navController = this.findNavController(R.id.myNavHostFragment)
return NavigationUI.navigateUp(navController, drawerLayout)
}
}
This is my Activity_main.xml
Activity_main.xml
<?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"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/myNavHostFragment"
android:name="androidx.navigation.fragment.NavHostFragment"
app:navGraph = "#navigation/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:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header"
app:menu="#menu/nav_drawer_menu"/>
</androidx.drawerlayout.widget.DrawerLayout>
</layout>
This is the menu layout for the navigation drawer:
nav_drawer_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group>
<item
android:id="#+id/nav_profile"
android:icon="#drawable/ic_person"
android:title="Profile"/>
<item
android:id="#+id/nav_messages"
android:icon="#drawable/ic_people"
android:title="Messages"/>
</group>
<item android:title="Account Settings">
<menu>
<item
android:id="#+id/nav_logout"
android:title="Sign Out"/>
</menu>
</item>
</menu>
This is how the navigation drawer looks like.
Am I missing something ? If there's anything unclear let me know.

You should use setNavigationItemSelectedListener.
Set a listener that will be notified when a menu item is selected.
navigationViewOBJ.setNavigationItemSelectedListener(this)
For DataBinding You should use
binding.navView.setNavigationItemSelectedListener(this)

I was facing the same issue and I changed my code in this manner to get Toast when Menuitems were select.
I removed NavigationView.OnNavigationItemSelectedListener this from
class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener
created a variable in MainActivity class in MianActivity.kt
private lateinit var navView : NavigationView
assigned navView variable in override fun onCreate function like this by finding navigation view id like this
navView = findViewById(R.id.nav_menu)
which in your case is in activity_main.xml under this Section
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header"
app:menu="#menu/nav_drawer_menu"/>
Then I implemented this function for onclick select
navView.setNavigationItemSelectedListener {}
I wrote switch case in this function same as your code and now it is working for me fine.

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)
}