如何在BottomNavigationView中的項目上設置長按偵聽器？

Question

正如標題所說，我有一個包含 3 個菜單項的BottomNavigationView ，並希望為每個菜單項分配一個長按偵聽器。
我在OnNavigationItemSelectedListener上設置了一個BottoNavigationView 。

我在這里嘗試過這個答案，但這對我沒有用......

大家還有什么推薦的方法嗎？

這就是我所擁有的......定期點擊工作順便說一句

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

有兩種方法可以解決這個問題。

1. 通過 findViewById(int id);

   bottomNavigationView.findViewById(R.id.action_home).setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { return true; } });

2. 通過'菜單視圖'；

    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; } }); }

   }

Answer 2

這是解決方案：

@Override
protected void onStart() {
    super.onStart();
    View view = findViewById(R.id.navigation_courses); // BottomNavigationView menu item id
    view.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View view) {
            Toast.makeText(getApplicationContext(), "Long pressed", Toast.LENGTH_SHORT).show();
            return false;
        }
    });
}

就我而言，它在onStart運行良好，在onCreate不起作用。 如果有人明白為什么，請告訴我。

Answer 3

下面的 JAVA 代碼絕對可以正常工作！！！

private void overrideOnMenuItemLongClickListener(BottomNavigationView bottomNavigationView) {
    if (bottomNavigationView != null && bottomNavigationView.getChildCount() > 0) {
        ViewGroup menuView = (ViewGroup) bottomNavigationView.getChildAt(0);
        if (menuView != null) {
            for (int i = 0; i < menuView.getChildCount(); i++) {
                menuView.getChildAt(i).setOnLongClickListener(v -> true);
            }
        }
    }
}

Answer 4

fun BottomNavigationView.setLonClkListner() {
    val position = 4 //item index in which u want to set LongClickListner
    val menuView = getChildAt(0) as ViewGroup
    menuView.getChildAt(position).setOnLongClickListener {
        findNavController().navigate(R.id.toSwitchAccount)
        true
    }
}

Answer 5

使setLongClickable(true); 在getView()每個項目上，它變成，

item.getActionView().setLongClickable(true);
item.getActionView().setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    return false;
                }
            });