VPScrollView.java

package com.smartandroid.sa.view;

import android.content.Context;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.widget.ScrollView;

public class VPScrollView extends ScrollView {

	private GestureDetector mGestureDetector;

	public VPScrollView(Context context, AttributeSet attrs) {
		super(context, attrs);
		mGestureDetector = new GestureDetector(context, new YScrollDetector());
	}

	@Override
	public boolean onInterceptTouchEvent(MotionEvent ev) {
		return super.onInterceptTouchEvent(ev)
				&& mGestureDetector.onTouchEvent(ev);
	}

	class YScrollDetector extends SimpleOnGestureListener {

		@Override
		public boolean onScroll(MotionEvent e1, MotionEvent e2,
				float distanceX, float distanceY) {

			return (Math.abs(distanceY) > Math.abs(distanceX));
		}
	}

}