AbInnerViewPager.java

package com.andbase.library.view.sample;

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.widget.ListView;
import android.widget.ScrollView;



/**
 * Copyright amsoft.cn
 * Author 还如一梦中
 * Date 2016/6/14 17:54
 * Email 396196516@qq.com
 * Info 这个ViewPager解决了外部是可滚动View（List或者scrollView）与内部可滑动View的事件冲突问题
 */
public class AbInnerViewPager extends ViewPager {

	/** 父滚动布局 */
	private ScrollView parentScrollView;
	
	/** 父列表布局. */
	private ListView parentListView;
	
	/** 手势. */
	private GestureDetector mGestureDetector;
	
	/**
	 * 构造函数.
	 * @param context the context
	 */
	public AbInnerViewPager(Context context) {
		super(context);
		mGestureDetector = new GestureDetector(new YScrollDetector());
		setFadingEdgeLength(0);
	}

	/**
	 * 构造函数.
	 * @param context the context
	 * @param attrs the attrs
	 */
	public AbInnerViewPager(Context context, AttributeSet attrs) {
		super(context, attrs);
		mGestureDetector = new GestureDetector(new YScrollDetector());
		setFadingEdgeLength(0);
	}
	
	/**
	 * 拦截事件.
	 * @param ev the ev
	 * @return true, if successful
	 */
	@Override
	public boolean onInterceptTouchEvent(MotionEvent ev) {
		return super.onInterceptTouchEvent(ev)
				&& mGestureDetector.onTouchEvent(ev);
	}

	/**
	 * 设置父级的View.
	 * @param flag 父是否滚动开关
	 */
	private void setParentScrollAble(boolean flag) {
		if(parentScrollView!=null){
			parentScrollView.requestDisallowInterceptTouchEvent(!flag);
		}
		
		if(parentListView!=null){
			parentListView.requestDisallowInterceptTouchEvent(!flag);
		}
		
	}

	/**
	 * 如果外层有ScrollView需要设置.
	 * @param parentScrollView the new parent scroll view
	 */
	public void setParentScrollView(ScrollView parentScrollView) {
		this.parentScrollView = parentScrollView;
	}
	
	/**
	 * 如果外层有ListView需要设置.
	 * @param parentListView the new parent scroll view
	 */
	public void setParentListView(ListView parentListView) {
		this.parentListView = parentListView;
	}
	
	
	/**
	 * 手势类.
	 */
	class YScrollDetector extends SimpleOnGestureListener {
		
		@Override
		public boolean onScroll(MotionEvent e1, MotionEvent e2,
				float distanceX, float distanceY) {
			
			if (Math.abs(distanceX) >= Math.abs(distanceY)) {
				//父亲不滑动
				setParentScrollAble(false);
				return true;
			}else{
				setParentScrollAble(true);
			}
			return false;
		}
	}

	

}