android-navigation

问题 I'm using Jetpack Navigation to handle the bottom navigation controller. It works great; however, I am looking for a way to improve the UX. Is it possible to disable the tab that the user is currently navigated to? I'm able to "spam" the current tab in the bottom navigation, which reloads data & the UI unnecessarily. If this behavior (of re-tapping the current tab) is intended, is there a way to retain the state of the fragment, so that when navigated away & to, it doesn't recreate? How I

问题 I'm using the Navigation Component in android where I have set 6 fragments initially. The problem is when I added a new fragment (ProfileFragment). When I navigate to this new fragment from the start destination, pressing the native back button does not pop the current fragment off. Instead, it just stays to the fragment I'm in - the back button does nothing. Here's my navigation.xml : <?xml version="1.0" encoding="utf-8"?> <navigation xmlns:android="http://schemas.android.com/apk/res/android

问题 I am doing some Espresso testing in Android. The test is failing with this error: java.lang.ClassCastException: androidx.fragment.app.testing.FragmentScenario$EmptyFragmentActivity cannot be cast to com.stavro_xhardha.pockettreasure.MainActivity This is my test method: @Test fun toolbarTitle_shouldContainCorrectInput() { val mockNavController = mock(NavController::class.java) val fragmentScenario = launchFragmentInContainer<SetupFragment>() fragmentScenario.onFragment { Navigation

问题 I have a navigation button for my navigation fragment which turns active and opens a navigation drawer menu upon click: Now when I click it, it turns active as follows: However, I want to associate it with a navigation drawer such a way that, even if I do not click the button and slide open the navigation drawer, the button turns active when the navigation drawer menu is open and when closed by sliding back in from right to left, the button turns red/inactive. The code which I am trying to

问题 I have created navigation drawer and displaying items in list. My list is static but i am displaying points. So when users select the items in the list and do some activity he get the points. So i want to update the points as soon as he gets. How can i do this./ Below is my code: Activity Class: @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.home_page); // Initializing dataList = new ArrayList<DrawerItem>(); mTitle =

问题 I have created navigation drawer and displaying items in list. My list is static but i am displaying points. So when users select the items in the list and do some activity he get the points. So i want to update the points as soon as he gets. How can i do this./ Below is my code: Activity Class: @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.home_page); // Initializing dataList = new ArrayList<DrawerItem>(); mTitle =

问题 I have created navigation drawer and displaying items in list. My list is static but i am displaying points. So when users select the items in the list and do some activity he get the points. So i want to update the points as soon as he gets. How can i do this./ Below is my code: Activity Class: @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.home_page); // Initializing dataList = new ArrayList<DrawerItem>(); mTitle =

问题 I have one case and wish to implement it by arch navigation component. For example I have 2 Nav Graphs (main and nested). Can I call main graph from nested and how? example 回答1: The point is to get the right NavController to navigate in the right graph. Let's take this scenario as an example: MainActivity |- MainNavHost |- NavBarFragment | |- NestedNavHost | | |-NestedContentFragment1 | | |-NestedContentFragment2 | | | |- BottomNavigationView | |- LoginFragment The main graph and the nested

问题 Basically, I have the following navigation graph: I want to change my starting point in navigation graph to fragment 2 right after reaching it (in order to prevent going back to fragment 1 when pressing back button - like with the splash screen). This is my code: navGraph = navController.getGraph(); navGraph.setStartDestination(R.id.fragment2); navController.setGraph(navGraph); But, obviously it's not working and it gets back to fragment 1 after pressing back button. Am I doing it wrong? Is

问题 I am using Navigation component, and I have a bottom navigation view in the main activity. when I tap the tab in that bottom navigation view, it seems that there is a fade in animation when the fragment appear. I don't think I manually set the animation, it seems that the animation will be there by default. I want to remove that animation. here is the code I use in my Main Activity. class MainActivity : AppCompatActivity(), NavController.OnDestinationChangedListener { private lateinit var