Vertically scrolling is not working about horizontalpicker

[vishalandroid123]

`public class PickerLayoutManager extends LinearLayoutManager {

private float scaleDownBy = 0.66f;
private float scaleDownDistance = 0.9f;
private boolean changeAlpha = true;

private onScrollStopListener onScrollStopListener;

public PickerLayoutManager(Context context, int orientation, boolean reverseLayout) {
    super(context, orientation, reverseLayout);
}

@Override
public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
    super.onLayoutChildren(recycler, state);

    int orientation = getOrientation();
    if (orientation == HORIZONTAL) {
        scaleDownViewHorizontal();
    } else {
        scaleDownViewVertical();
    }
}

@Override
public int scrollHorizontallyBy(int dx, RecyclerView.Recycler recycler, RecyclerView.State state) {
    int orientation = getOrientation();
    if (orientation == HORIZONTAL) {
        int scrolled = super.scrollHorizontallyBy(dx, recycler, state);
        scaleDownViewHorizontal();
        return scrolled;
    } else return 0;
}

@Override
public int scrollVerticallyBy(int dy, RecyclerView.Recycler recycler, RecyclerView.State state) {
    int orientation = getOrientation();
    if (orientation == VERTICAL) {
        int scrolled = super.scrollVerticallyBy(dy, recycler, state);
        scaleDownViewVertical();
        return scrolled;
    } else return 0;
}

private void scaleDownViewHorizontal() {
    float mid = getWidth() / 2.0f;
    float unitScaleDownDist = scaleDownDistance * mid;
    for (int i = 0; i < getChildCount(); i++) {
        View child = getChildAt(i);
        float childMid = (getDecoratedLeft(child) + getDecoratedRight(child)) / 2.0f;
        float scale = 1.0f + (-1 * scaleDownBy) * (Math.min(unitScaleDownDist, Math.abs(mid - childMid))) / unitScaleDownDist;
        child.setScaleX(scale);
        child.setScaleY(scale);
        if (changeAlpha) {
            child.setAlpha(scale);
        }
    }
}

private void scaleDownViewVertical() {
    float mid = getHeight() / 2.0f;
    float unitScaleDownDist = scaleDownDistance * mid;
    for (int i = 0; i < getChildCount(); i++) {
        View child = getChildAt(i);
        float childMid = (getDecoratedTop(child) + getDecoratedBottom(child)) / 2.0f;
        float scale = 1.0f + (-1 * scaleDownBy) * (Math.min(unitScaleDownDist, Math.abs(mid - childMid))) / unitScaleDownDist;
        child.setScaleX(scale);
        child.setScaleY(scale);
        if (changeAlpha) {
            child.setAlpha(scale);
        }
    }
}

@Override
public void onScrollStateChanged(int state) {
    super.onScrollStateChanged(state);
    if (state == 0) {
        if (onScrollStopListener != null) {
            int selected = 0;
            float lastHeight = 0f;
            for (int i = 0; i < getChildCount(); i++) {
                if (lastHeight < getChildAt(i).getScaleY()) {
                    lastHeight = getChildAt(i).getScaleY();
                    selected = i;
                }
            }
            onScrollStopListener.selectedView(getChildAt(selected));
        }
    }
}

public float getScaleDownBy() {
    return scaleDownBy;
}

public void setScaleDownBy(float scaleDownBy) {
    this.scaleDownBy = scaleDownBy;
}

public float getScaleDownDistance() {
    return scaleDownDistance;
}

public void setScaleDownDistance(float scaleDownDistance) {
    this.scaleDownDistance = scaleDownDistance;
}

public boolean isChangeAlpha() {
    return changeAlpha;
}

public void setChangeAlpha(boolean changeAlpha) {
    this.changeAlpha = changeAlpha;
}

public void setOnScrollStopListener(onScrollStopListener onScrollStopListener) {
    this.onScrollStopListener = onScrollStopListener;
}

public interface onScrollStopListener {
    public void selectedView(View view);
}

}
`

and change the layout file to
`

<android.support.v7.widget.RecyclerView
    android:id="@+id/rv"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:clipToPadding="false"
    android:paddingBottom="183dp"
    android:paddingTop="183dp" />

`