17

I would like to add a custom item in the new BottomNavigationView .

There are plenty of tutorial of adding a custom view with the normal navigation view but I can't find anything regarding the bottom one.

This is my view

   <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:menu="@menu/menu_main" />

And this is the menu

<?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android">

<item
    android:id="@+id/menu_one"
    android:icon="@drawable/ic_tab_one"
    android:title="one" />
<item
    android:id="@+id/menu_two"
    app:actionLayout="@layout/item_action_notification"
    android:title="two" />

As you can see I put actionLayout tag as you would do normally, but it is simply not displayed.

Any ideas? Thanks.

Manza
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1 Answers1

25

Hope the below solution will help.

  1. Create a layout : layout/_custom_cart_item_layout.xml

    <?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
android:id="@+id/cart_badge"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_gravity="top|center_horizontal"
android:layout_marginLeft="10dp"
android:background="@drawable/circle"
android:backgroundTint="@color/colorAccent"
android:gravity="center"
android:text="0"
android:textColor="@android:color/white"
android:textSize="12sp" />

</FrameLayout>

  2. drawable/circle

    <?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" 
android:shape="oval">
<solid android:color="@color/white"/>
<size android:width="40dp" android:height="40dp" />
</shape>

  3. MainActivity : layout/main_activity.xml

    <?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.MainActivity">

<android.support.design.widget.BottomNavigationView
android:id="@+id/bot_nav"
android:layout_width="0dp"
android:layout_height="56dp"
android:background="@color/white"
android:elevation="2dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="@menu/bottom_menu" />

</android.support.constraint.ConstraintLayout>

  4. menu : menu/bottom_menu.xml

    <?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">

<item
android:id="@+id/menu_home"
android:icon="@drawable/home24"
android:title="Home" />

<item
android:id="@+id/menu_cart"
android:icon="@drawable/shoppingcart24"
android:title="Cart" />
<item
android:id="@+id/menu_acct"
android:icon="@drawable/user24"
android:title="Account" />
</menu>

  5. In your MainActivity class within onCreate

    BottomNavigationView mbottomNavigationView =findViewById(R.id.bot_nav);

BottomNavigationMenuView mbottomNavigationMenuView =
(BottomNavigationMenuView) mbottomNavigationView.getChildAt(0);

View view = mbottomNavigationMenuView.getChildAt(1);

BottomNavigationItemView itemView = (BottomNavigationItemView) view;

View cart_badge = LayoutInflater.from(this)
.inflate(R.layout._custom_cart_item_layout,
 mbottomNavigationMenuView, false);

itemView.addView(cart_badge);

Output : Image

Hope it will work similar for you.

Thank you

Pramila Shankar
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