@Override
    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
        // Dispatch scroll events from this ViewPager.
        if (event.getEventType() == AccessibilityEventCompat.TYPE_VIEW_SCROLLED) {
            return super.dispatchPopulateAccessibilityEvent(event);
        }

        // Dispatch all other accessibility events from the current page.
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = getChildAt(i);
            if (child.getVisibility() == VISIBLE) {
                final ItemInfo ii = infoForChild(child);
                if (ii != null && ii.position == mCurItem &&
                        child.dispatchPopulateAccessibilityEvent(event)) {
                    return true;
                }
            }
        }

        return false;
    }
We only want the current page that is being shown to be focusable.
library/src/main/java/com/daimajia/slider/library/Tricks/ViewPagerEx.java