drag problem,when i drag to the side of photoview in viewpager

when I drag to the side of photoview(photoview is bigger than screen) and then drag to the other side,photoview can not catch motionevent and viewpager get the motionevent and then to the next page.

Maybe problem is here

ViewParent parent = imageView.getParent();
if (mAllowParentInterceptOnEdge && !mScaleDragDetector.isScaling() && !mBlockParentIntercept) {
if (mScrollEdge == EDGE_BOTH
|| (mScrollEdge == EDGE_LEFT && dx >= 1f)
|| (mScrollEdge == EDGE_RIGHT && dx <= -1f)) {
if (null != parent) {
parent.requestDisallowInterceptTouchEvent(false);
}
}
} else {
if (null != parent) {
parent.requestDisallowInterceptTouchEvent(true);
}
}