how to set BottomNavigationView items in the center in android (Kotlin)

Question

I have 3 items in my BottomNavigationView that I resized every Item with this code :

  val menuView = bottomNavigation.getChildAt(0) as BottomNavigationMenuView

        for (i in 0 until menuView.childCount) {
            val iconView = menuView.getChildAt(i).findViewById<View>(android.support.design.R.id.icon)
            val layoutParams = iconView.layoutParams
            val displayMetrics = resources.displayMetrics
            layoutParams.height = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20f, displayMetrics).toInt()
            layoutParams.width = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20f, displayMetrics).toInt()
            iconView.layoutParams = layoutParams

        }

now this item isn't in the center of BottomNavigationView. may please help me to put every item in the center of BottomNavigationView with Kotlin method ?!

sure. I'll fix this. sorry – Mehrdad Dolatkhah Mar 03 '19 at 09:55 — Mehrdad Dolatkhah, Mar 03 '19 at 09:55

score 0 · Answer 1 · answered Mar 03 '19 at 05:37

Try below thing

Solution 1

public static void disableShiftMode(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);
                //noinspection RestrictedApi 
                item.setShiftingMode(false);
                // set once again checked value, so view will be updated 
                //noinspection RestrictedApi 
                item.setChecked(item.getItemData().isChecked());
            } 
        } catch (NoSuchFieldException e) {
            Log.e("BNVHelper", "Unable to get shift mode field", e);
        } catch (IllegalAccessException e) {
            Log.e("BNVHelper", "Unable to change value of shift mode", e);
        } 
    }

Solution 2

If you are using latest support libs then you can go this this solution. add this line in xml

app:labelVisibilityMode="labeled"


<android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="0dp"
        android:layout_marginEnd="0dp"
        android:background="?android:attr/windowBackground"
        app:itemBackground="@drawable/home_bottom_bg_selector"
        app:itemIconTint="@color/home_bottom_text_selector"
        app:itemTextColor="@color/home_bottom_text_selector"
        app:labelVisibilityMode="labeled"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:menu="@menu/navigation" />

Solution 2 not worked because this : app:labelVisibilityMode="labeled" and for Solution 1, I use Kotlin for a whole project dear Mehul Kabaria — Mehrdad Dolatkhah, Mar 03 '19 at 05:54

how to set BottomNavigationView items in the center in android (Kotlin)

1 Answers1