When scroll bottom navigation bar does not hide - BottomNavigationBehavior

Question

i want to hide bottom navigation bar so i am using bottom navigation behavior it works when i had other code but in this it seems not working i tried but bottom navigation bar

Answer 1

BottomLayoutBehavior.java

package com.utility.behaviour;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;

import androidx.annotation.NonNull;
import androidx.coordinatorlayout.widget.CoordinatorLayout;
import androidx.core.view.ViewCompat;

public class BottomLayoutBehavior extends CoordinatorLayout.Behavior {

    public BottomLayoutBehavior(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public boolean onStartNestedScroll(@NonNull CoordinatorLayout coordinatorLayout, @NonNull V child,
                                       @NonNull View directTargetChild, @NonNull View target, int axes, int type) {
        return axes == ViewCompat.SCROLL_AXIS_VERTICAL;
    }

    @Override
    public void onNestedPreScroll(@NonNull CoordinatorLayout coordinatorLayout, @NonNull V child,
                                  @NonNull View target, int dx, int dy, @NonNull int[] consumed, int type) {
        child.setTranslationY(Math.max(0f, Math.min(child.getHeight(), child.getTranslationY() + dy)));
        super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed, type);
    }
}

activity_main.xml

NB: android:layout_gravity="bottom" & app:layout_behavior="com.utility.behaviour.BottomLayoutBehavior" is mandatory.