Scroll dx, dy using AccessibilityService in Android

Hi I want to scroll dx or dy using AccessibilityService, currently I am using below code to scroll but this performs 1 full page scroll, how can i scroll based on values like (x1, y1) to (x2, y2) or using dx/dy using performAction() function in AccessibilityService.

public boolean scrollView(AccessibilityNodeInfo nodeInfo) {

    if (nodeInfo == null) return false;

    if (nodeInfo.isScrollable()) {
        return nodeInfo.performAction(AccessibilityNodeInfo.ACTION_SCROLL_FORWARD);
    }

    for (int i = 0; i < nodeInfo.getChildCount(); i++) {
    if (scrollView(nodeInfo.getChild(i)) {
        return true;
    }
}

return false; }