BottomAppBar Navigation Icon with Badge

Question

I am using the new BottomAppBar in an app. But I can't make the badge to work. I tried using the same logic used on BottomNavigationView, but it is not working.(In another app I have a BottomNavigationView inside a BottomAppBar where the badge works, but couldn't use the same code in the BottomAppBar app(Navigation Icon).

   MenuView.ItemView itemView = (MenuView.ItemView) bottomAppBar.getChildAt(posicao);

    notificationBadge = LayoutInflater.from(this).inflate(R.layout.view_notification_badge, (ViewGroup) itemView, false);
    TextView notific = notificationBadge.findViewById(R.id.badge);
    notific.setText(notificacao);

    itemView.addView(notificationBadge);

What I want to do:

I tried the BadgeNavigationDrawable class. But couldn't find the right reference to the navigation icon in the BottomAppBar.

Thanks.

Answer 1

you can have a try like this: in the xml ，set "app:navigationIcon"(the left icon in the bottomAppBar):

   <android.support.design.bottomappbar.BottomAppBar
    android:id="@+id/bottom_appbar"
    android:layout_width="match_parent"
    android:layout_height="44dp"
    android:layout_gravity="bottom"
    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    app:fabAttached="true"
    app:backgroundTint="@color/colorPrimary"
    app:navigationIcon="@android:drawable/ic_dialog_email" 
    app:fabCradleVerticalOffset="12dp"/>

then in the activity:

  BottomAppBar bottomAppBar = (BottomAppBar) findViewById(R.id.bottom_appbar);
  bottomAppBar.setNavigationOnClickListener(this);

   @Override
   public void onClick(View v) {
    //do something
}