public class MyHoverMenuService extends HoverMenuService {

    @Override
    protected HoverMenuAdapter createHoverMenuAdapter() {
        // Create and configure your content for the HoverMenu.
        return myHoverMenuAdapter;
    }
    
}

public class MyHoverMenuAdapter extends BaseHoverMenuAdapter {

    private List<String> mTabs;
    private Map<String, NavigatorContent> mContentMap = new HashMap<>();
    
    public MyHoverMenuAdapter() {
        mTabs = Arrays.asList("first", "second");
        mContentMap.put("first", /*...*/);
        mContentMap.put("second, /*...*/);
    }

    @Override
    public void getTabCount() {
        return mTabs.size();
    }
    
    @Override
    public long getTabId(int position) {
        return mTabs.get(position).hashCode();
    }
    
    @Override
    public View getTabView(int position) {
        String tabName = mTabs.get(position);
        if ("first".equals(tabName)) {
            // Create and return the tab View for "first".
        } else if ("second".equals(tabName)) {
            // Create and return the tab View for "second".
        }
        // etc.
    }
    
    @Override
    public NavigatorContent getNavigatorContent(int position) {
        String tabName = mTabs.get(position);
        return mContentMap.get(tabName);
    }

}

// Build a HoverMenu.
HoverMenu hoverMenu = new HoverMenuBuilder(context)
                        .displayWithinWindow()
                        .useNavigator(myNavigator)
                        .startAtLocation(savedLocationMemento)
                        .useAdapter(adapter)
                        .build();

// When you're ready for your HoverMenu to appear on screen.
hoverMenu.show();

// When you want to remove your HoverMenu from the screen.
hoverMenu.hide();

// When you want to force your HoverMenu to expand fullscreen.
hoverMenu.expandMenu();

// When you want to force your HoverMenu to collapse to a draggable icon.
hoverMenu.collapseMenu();

// When you want to change the tabs and content in your HoverMenu.
hoverMenu.setAdapter(otherAdapter);

// When you want to save the display state of your HoverMenu.
Parcelable displayState = hoverMenu.createDisplayStateMemento();

// When you want to be notified when your HoverMenu is added to/removed from the display.
hoverMenu.addOnVisibilityChangeListener(listener);

// When you want to be notified when your HoverMenu expands or collapses.
hoverMenu.addOnCollapseAndExpandListener(listener);