androidnavigation-drawerandroid-navigationandroid-navigationviewandroid-bottomnavigationview

Android ReselectedListener for NavigationView


In BottomNavigationView it is possible to set:

    bottomNavigationView.setOnNavigationItemReselectedListener(item -> {
        // do nothing on reselection
    });

However for NavigationView this is not available. What is a good equivalent?


UPDATE

Thanks to @ande I implemented the following:

@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
    if (currentMenuItemId == item.getItemId()) {
        navDrawer.close();
        return true;
    }
    currentMenuItemId = item.getItemId();
    NavigationUI.onNavDestinationSelected(item, navController);
    navDrawer.close();
    return true;
}

That works well for if I only navigate via the menu items. (Btw, I just implemented the Listener in my Activity and added it from there, no need for an extra class)
However, when I press the back button then I will be able to press the menu button for the current destination, as the menu item did not update on onBackPressed().


Update 2

    navController.addOnDestinationChangedListener(new NavController.OnDestinationChangedListener() {
        @Override
        public void onDestinationChanged(@NonNull NavController controller, @NonNull NavDestination destination, @Nullable Bundle arguments) {
            currentMenuItemId = destination.getId();
        }
    });

This solved it!


Solution

  • May be you can do like this ( I did quickly so may be it could be better!!)

        class ReSelectedListener(val navigationViewCallBack: NavigationViewCallBack) : NavigationView.OnNavigationItemSelectedListener {
    
        var newItemSelected : MenuItem? = null
        override fun onNavigationItemSelected(item: MenuItem): Boolean {
            if(newItemSelected != null){
                if(newItemSelected!!.itemId == item.itemId){
                    navigationViewCallBack.setOnNavigationItemReselectedListener(item)
                }
            }
            newItemSelected = item
            return true
        }
    
    
    }
    
    interface NavigationViewCallBack {
        fun setOnNavigationItemReselectedListener(item: MenuItem)
    }
    

    And after

    class YourFragment :Fragment(), NavigationViewCallBack
    

    and

    navigationView.setNavigationItemSelectedListener(ReSelectedListener(this))
    

    and implements callback method in YourFragment:

     override fun setOnNavigationItemReselectedListener(item: MenuItem) {
            TODO("Not yet implemented")
        }