Android中RecycleView与ViewPager冲突的解决方法及原理

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.ViewGroup;

/**
 * Developer：chunsoft on 2016/10/31 16:04
 * Email：chun_soft@qq.com
 * Content：viewPager和RecycleView相互冲突，将父View传到ViewPager里面
 * 使用父类方法requestDisallowInterceptTouchEvent(true)
 * 用来子View告诉父容器不要拦截我们的事件的
 */

public class DecoratorViewPager extends ViewPager{
 private ViewGroup parent;
 public DecoratorViewPager(Context context) {
 super(context);
 }

 public DecoratorViewPager(Context context, AttributeSet attrs) {
 super(context, attrs);
 }

 public void setNestedpParent(ViewGroup parent) {
 this.parent = parent;
 }


 @Override
 public boolean dispatchTouchEvent(MotionEvent ev) {
 if (parent != null){
  parent.requestDisallowInterceptTouchEvent(true);
 }
 return super.dispatchTouchEvent(ev);
 }

 @Override
 public boolean onInterceptTouchEvent(MotionEvent ev) {
 if (parent != null){
  parent.requestDisallowInterceptTouchEvent(true);
 }
 return super.onInterceptTouchEvent(ev);
 }

 @Override
 public boolean onTouchEvent(MotionEvent ev) {
 if (parent != null){
  parent.requestDisallowInterceptTouchEvent(true);
 }
 return super.onTouchEvent(ev);
 }
}

DecoratorViewPager mPager = (DecoratorViewPager) mHeaderView.findViewById(R.id.viewpager);

 mPager.setNestedpParent((ViewGroup) mPager.getParent());

<com.chunsoft.baseframework.utils.view.DecoratorViewPager
 android:id="@+id/viewpager"
 android:layout_width="match_parent"
 android:layout_height="180dp" />

/**
* Created by magic on 2017/6/12 0012.外部拦截处理ViewPager嵌套RecycleView左右滑动切换Fragment卡顿问题
*/

public class MyViewPager extends ViewPager {

float x, y;

public MyViewPager(Context context) {
super(context);
}

public MyViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}

@Override
public boolean onInterceptHoverEvent(MotionEvent event) {

switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
x = event.getX();
y = event.getY();
return super.onInterceptHoverEvent(event);
case MotionEvent.ACTION_MOVE:
if (Math.abs(x - event.getX()) > Math.abs(y - event.getY()))
return true;
else return false;
case MotionEvent.ACTION_UP:
return super.onInterceptHoverEvent(event);
}
return super.onInterceptHoverEvent(event);
}
}