Using Bottom Navigation Drawer in Android

You will learn: 

• Adding bottom navigation drawer

• Disabling shifting mode in bottom nav

Prerequisite: 

• Should know to create a new project in Android Studio

Follow the steps:

1.       Go to build.gradle (Module: app) and add the following dependency and sync the project

        compile 'com.android.support:design:27.1.0'

2.       Go to the layout file and add the following xml code

<android.support.design.widget.BottomNavigationView
    android:id="@+id/bottom_nav_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="start"
    design:menu="@menu/menu_bottom_nav"/> 

For @menu/menu_bottom_nav :

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@+id/menu_home"
        android:title="Home"
        android:icon="@drawable/ic_home_black_24dp"/>
    <item android:id="@+id/menu_exercise"
        android:title="Exercise"
        android:icon="@drawable/ic_exercise_black_24dp"/>
    <item android:id="@+id/menu_community"
        android:title="Community"
        android:icon="@drawable/ic_forum_black_24dp"/>
    <item android:id="@+id/menu_profile"
        android:title="Profile"
        android:icon="@drawable/ic_person_black_24dp"/>
</menu>

3.       Now initialize the bottom navigation drawer in your respective activity or fragment

BottomNavigationView bottomNavigationView = (BottomNavigationView) findViewById(R.id.bottom_nav_view);

Now run the project and bottom navigation is ready. Here the bottom navigation has shifting mode. To remove the shifting mode:

1. Create a class.

public class BottomNavigationViewHelper {
    public 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");
        }
    }
}

2. In your activity or fragment add the following code:

       BottomNavigationViewHelper.removeShiftMode(bottomNavigationView);