Remove Animation/Shifting mode from BottomNavigationView android [duplicate]

Question

Ok i found a way in case it helps someone else. So by default BottomNavigationView add shiftingmode = true when its more than 3 items.

At this moment you cannot change it through existing API and the only way to disable shift mode is to use reflection.

So we can use this helper to get rid of this:

class BottomNavigationViewHelper {

    static void removeShiftMode(BottomNavigationView view) {
        BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
        try {
            Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
            shiftingMode.setAccessible(true);
            shiftingMode.setBoolean(menuView, false);
            shiftingMode.setAccessible(false);
            for (int i = 0; i < menuView.getChildCount(); i++) {
                BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
                item.setShiftingMode(false);
                // set once again checked value, so view will be updated
                item.setChecked(item.getItemData().isChecked());
            }
        } catch (NoSuchFieldException e) {
            Log.e("ERROR NO SUCH FIELD", "Unable to get shift mode field");
        } catch (IllegalAccessException e) {
            Log.e("ERROR ILLEGAL ALG", "Unable to change value of shift mode");
        }
    }
}

and then use it like this:

BottomNavigationView bottomNavigationView = (BottomNavigationView)findViewById(R.id.bottomBar);
BottomNavigationViewHelper.removeShiftMode(bottomNavigationView);

Hope this helps someone with the same problem with me!!!

Remember, you'll need to execute this method each time you change menu items in your BottomNavigationView.

UPDATE

As per different stackoverflow question, you also need to update proguard configuration file (e.g. proguard-rules.pro), code above uses reflection and won't work if proguard obfuscate the mShiftingMode field.

-keepclassmembers class android.support.design.internal.BottomNavigationMenuView { 
    boolean mShiftingMode; 
}