Android Design Support Library Navigation-view Customization

Question

I have a couple of questions about the new navigation view.

1) Scrolling the navigation view scrolls the whole view but I just want the header to stay at it's place and the navigation item to scroll.

2) To implement dividers b/w navigation items, I can do something like this:

<item
android:id="@+id/navigation_subheader"
android:title="@string/navigation_subheader">
<menu>
    <item
        android:id="@+id/navigation_sub_item_1"
        android:icon="@drawable/ic_android"
        android:title="@string/navigation_sub_item_1"/>
    <item
        android:id="@+id/navigation_sub_item_2"
        android:icon="@drawable/ic_android"
        android:title="@string/navigation_sub_item_2"/>
</menu>
</item>

But It does not work without the subheader. I tried to give it an blank string but that just leaves a vertical blank space instead of the subheader. I need the navigation item groups separated by dividers but without the subheaders.

3) Manipulating the navigation items dynamically. Before this, I used to use vertical list view as navigation item. Where I'd just set the visibility to gone of whichever navigation item I didn't want. How can I dynamically change the navigation items?

Answer 1

1) Scrolling the navigation view scrolls the whole view but I just want the >header to stay at it's place and the navigation item to scroll.

You can't obtain it with the current NavigationView. It follows the Material guidelines. If you would like this kind of pattern you have to use a custom view.

2) To implement dividers b/w navigation items, I can do something like this:

You can use the standard NavigationView defining a menu like this:

<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <group android:id="@+id/group1" android:checkableBehavior="single" id>
       //items of group1
    </group>

    <group android:id="@+id/group2" android:checkableBehavior="single" id>
       //items of group2
    </group>
</menu>

It is important to give an unique id to each group.

3) Manipulating the navigation items dynamically

You can use something like:

navigationview.getMenu().findItem(R.id.drawer_item_xxx).setVisible(xxx);

Answer 2

1) Scrolling the navigation view scrolls the whole view but I just want the >header to stay at it's place and the navigation item to scroll.

Since NavigationView is a FrameLayout we can add a ListView as a child and don't forget to delete app:menu attribute in the NavigationView then You'll get the desired behavior.