Create numeric indicator at a navigation view item android

Question

I just created a navigation view drawer using menu:

<group
    android:id="@+id/menu_top">
    <item
        android:id="@+id/nav_1"
        android:icon="@drawable/ic_menu_camera"
        android:title="Camera" />
    <item
        android:id="@+id/nav_2"
        android:icon="@drawable/ic_menu_gallery"
        android:title="Gallery" />
    <item
        android:id="@+id/nav_3"
        android:icon="@drawable/ic_menu_slideshow"
        android:title="Slideshow"/>
</group>

Now, I wonder how to add a numerical indicator on one of its items. Just like when Google Play Store having some updates on our installed apps. For example, item cart on screenshot below:

Any suggestions? Thank you.

Answer 1

1) Use actionLayout in your menu items:

<item
    android:id="@+id/nav_1"
    android:icon="@drawable/ic_menu_camera"
    android:title="Camera"
    app:actionLayout="@layout/view_counter" />

2) Create view_counter

<TextView
    android:id="@+id/tvCounter" 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical" />

3) Find MenuItem and set counter

MenuItem mItem = mNavView.getMenu().findItem(nav_1); // Find navigation item
View view = mItem.getActionView();
if (view instanceOf TextView) { // Double check, returned view is TextView
    ((TextView) view).setText(count);
}