java - 如何在 BottomNavigationView 中的项目上设置长按监听器？

Question

正如标题所说，我有一个包含 3 个菜单项的 BottomNavigationView，我想为每个菜单项分配一个长按监听器。
我在 BottoNavigationView 上设置了一个 OnNavigationItemSelectedListener。

我试过这个答案 here 但这对我没有用...

大家还有什么推荐的方法吗？

这就是我所拥有的...顺便说一句，正常点击工作正常

private void setUpNavigationListeners() {
    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
    ft.add(R.id.fragment_container, new CalendarView()).commit();
    navigation.setOnNavigationItemSelectedListener(
            new BottomNavigationView.OnNavigationItemSelectedListener() {

                @Override
                public boolean onNavigationItemSelected(@NonNull MenuItem item) {

                    Fragment fragment;
                    switch (item.getItemId()) {
                        case R.id.navigation_courses:
                            subtitle.setText(R.string.courses);
                            fragment = new CalendarView();
                            break;
                        case R.id.navigation_assignments:
                            subtitle.setText(R.string.assignments);
                            fragment = new AssignmentView();
                            break;
                        case R.id.navigation_professors:
                            subtitle.setText(R.string.professors);
                            return false;
                        default:
                            return false;
                    }

                    FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
                    ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
                    ft.replace(R.id.fragment_container, fragment).commit();
                    return true;
                }

            });
    navigation.setItemIconTintList(null);

    Menu menu = navigation.getMenu();
    MenuItem courses = menu.findItem(R.id.navigation_courses);
    MenuItem assignments = menu.findItem(R.id.navigation_assignments);
    MenuItem prof = menu.findItem(R.id.navigation_professors);

    courses.setActionView(new ImageButton(this));
    courses.getActionView().setLongClickable(true);
    Log.d("Manage", "Is long clickable:" + courses.getActionView().isLongClickable());
    courses.getActionView().setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View v) {
            Log.d("Manage", "Long clicked");
            return true;
        }
    });

}

Answer 1

有两种方法可以解决这个问题。

1. 通过 findViewById(int id);

   bottomNavigationView.findViewById(R.id.action_home).setOnLongClickListener(new View.OnLongClickListener() { @覆盖 public boolean onLongClick(View v) { 返回真； } });

2. 通过'menuView';

   private void overrideOnMenuItemLongClickListener(BottomNavigationView bottomNavigationView){
   
   if(bottomNavigationView == null){
       return;
   }
   
   int count = bottomNavigationView.getChildCount();
   if(count <= 0){
       return;
   }
   
   ViewGroup menuView = (ViewGroup) bottomNavigationView.getChildAt(0);
   if(menuView == null){
       return;
   }
   
   int menuItemViewSize = menuView.getChildCount();
   if(menuItemViewSize <= 0){
       return;
   }
   
   for(int i=0; i < menuItemViewSize; i++){
       menuView.getChildAt(i).setOnLongClickListener(new View.OnLongClickListener() {
           @Override
           public boolean onLongClick(View v) {
               return true;
           }
       });
   }