<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="#2488e2"
     　　app:itemIconTint="@color/tab_icon"

        app:itemTextColor="@color/tab_icon"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintLeft_toLeftOf="parent"

        app:layout_constraintRight_toRightOf="parent"

        app:menu="@menu/navigation"

        />

<selector xmlns:android="http://schemas.android.com/apk/res/android">

 <item android:color="@color/colorNormal" android:state_checked="false" />

    <item android:color="@color/colorSelected" android:state_checked="true"/>

</selector>

 <item

        android:id="@+id/navigation_1"

        android:icon="@drawable/icon"

        android:title="@string/tab_title" />

public class BottomNavigationViewHelper {

    @SuppressLint("RestrictedApi")

    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) {

        } catch (IllegalAccessException e) {

        }

    }

}