BottomNavigationView - How to uncheck all MenuItems and keep Titles being displayed?

mNavigationBottom.getMenu().setGroupCheckable(0, false, true);

To unselect all items I have create this extension:

fun BottomNavigationView.uncheckAllItems() {
    menu.setGroupCheckable(0, true, false)
    for (i in 0 until menu.size()) {
        menu.getItem(i).isChecked = false
    }
    menu.setGroupCheckable(0, true, true)
}

menu.setGroupCheckable(0, true, false) make it possible. The third parameter made the menu not exclusive and then within the loop you change the checked status. To finish set the menu to exclusive again.

Here the doc

Thanks for your idea. I have implement it in my lib. I have a better way do it by reflect. So it won't show space.

If you have interest. Click here : https://github.com/ittianyu/BottomNavigationViewEx

private void initBottomViewAndLoadFragments(final BottomNavigationViewEx bnve) {
    bnve.enableAnimation(false);
    bnve.enableShiftingMode(false);
    bnve.enableItemShiftingMode(false);

    // use the unchecked color for first item
    bnve.setIconTintList(0, getResources().getColorStateList(R.color.bnv_unchecked_black));
    bnve.setTextTintList(0, getResources().getColorStateList(R.color.bnv_unchecked_black));

    bnve.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {

        private boolean firstClick = true;
        private int lastItemId = -1;

        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            // restore the color when click
            if (firstClick) {
                firstClick = false;
                bnve.setIconTintList(0, getResources().getColorStateList(R.color.selector_bnv));
                bnve.setTextTintList(0, getResources().getColorStateList(R.color.selector_bnv));
            }

            if (firstClick || lastItemId == -1 || lastItemId != item.getItemId()) {
                lastItemId = item.getItemId();
            } else {
                return false;
            }

            // do stuff
            return fillContent(item.getItemId());
        }
    });
}

-- res/color/selector_bnv.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="@color/bnv_checked_white" android:state_checked="true" />
    <item android:color="@color/bnv_unchecked_black" />
</selector>

-- res/values/colors.xml

<color name="bnv_checked_white">@android:color/white</color>
<color name="bnv_unchecked_black">@android:color/black</color>