SeekBar in a NavigationDrawer

Just add an onTouchListener. When you touch the screen on the seekbar (action_down) disallow parent to intercept the event.

seekbar.setOnTouchListener(new ListView.OnTouchListener() 
{
    @Override
    public boolean onTouch(View v, MotionEvent event) 
    {
        int action = event.getAction();
        switch (action) 
        {
        case MotionEvent.ACTION_DOWN:
            // Disallow Drawer to intercept touch events.
            v.getParent().requestDisallowInterceptTouchEvent(true);
            break;

        case MotionEvent.ACTION_UP:
            // Allow Drawer to intercept touch events.
            v.getParent().requestDisallowInterceptTouchEvent(false);
            break;
        }

        // Handle seekbar touch events.
        v.onTouchEvent(event);
        return true;
    }
});