解决android-Ultra-Pull-To-Refresh 和ViewPager冲突的问题

由于PtrFrameLayout在dispatchOnTouchEvent中没有判断事件拦截的情况，导致PtrFrameLayout如果内部的content包含有ViewPager时会出现翻页异常困难的情况，参考了网上的多的文章没有解决，很多都是有bug的，今天在网上看到SwipeRefreshLayout 和Viewpager的冲突解决方法,参考了下 灵机一动，原文地址Android：SwipeRefreshLayout和ViewPager滑动冲突的原因，做了一些简单的修改！希望可以帮到正在被这个问题困惑的朋友，谢谢！代码如下。

<pre name="code" class="java">package com.hengtiansoft.mob.ui.view;import android.content.Context;import android.support.v4.view.ViewConfigurationCompat;import android.support.v4.view.ViewPager;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.ViewConfiguration;import in.srain.cube.views.ptr.PtrClassicDefaultHeader;import in.srain.cube.views.ptr.PtrFrameLayout;public class PtrHTFrameLayout extends PtrFrameLayout {    private PtrClassicDefaultHeader mPtrClassicHeader;    private float startY;    private float startX;    // 记录viewPager是否拖拽的标记    private boolean mIsHorizontalMove;    // 记录事件是否已被分发    private boolean isDeal;    private ViewPager mViewPager;    private int mTouchSlop;    public PtrHTFrameLayout(Context context) {        super(context);        initViews();    }    public PtrHTFrameLayout(Context context, AttributeSet attrs) {        super(context, attrs);        initViews();    }    public PtrHTFrameLayout(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        initViews();    }    private void initViews() {        mPtrClassicHeader = new PtrClassicDefaultHeader(getContext());        setHeaderView(mPtrClassicHeader);        addPtrUIHandler(mPtrClassicHeader);    }    public PtrClassicDefaultHeader getHeader() {        return mPtrClassicHeader;    }    /**     * Specify the last update time by this key string     *     * @param key     */    public void setLastUpdateTimeKey(String key) {        if (mPtrClassicHeader != null) {            mPtrClassicHeader.setLastUpdateTimeKey(key);        }    }    /**     * Using an object to specify the last update time.     *     * @param object     */    public void setLastUpdateTimeRelateObject(Object object) {        if (mPtrClassicHeader != null) {            mPtrClassicHeader.setLastUpdateTimeRelateObject(object);        }    }    /**     * PtrHTFrameLayout has a viewpager     *     * @param viewPager     */    public void setViewPager(ViewPager viewPager) {        this.mViewPager = viewPager;        if (mViewPager == null) {            throw new IllegalArgumentException("viewPager can not be null");        }        final ViewConfiguration configuration = ViewConfiguration.get(getContext());        mTouchSlop = ViewConfigurationCompat.getScaledPagingTouchSlop(configuration);    }    @Override    public boolean dispatchTouchEvent(MotionEvent ev) {        if (mViewPager == null) {            return super.dispatchTouchEvent(ev);        }        int action = ev.getAction();        switch (action) {            case MotionEvent.ACTION_DOWN:                // 记录手指按下的位置                startY = ev.getY();                startX = ev.getX();                // 初始化标记                mIsHorizontalMove = false;                isDeal = false;                break;            case MotionEvent.ACTION_MOVE:                // 如果已经判断出是否由横向还是纵向处理，则跳出                if (isDeal) {                    break;                }                /**拦截禁止交给Ptr的 dispatchTouchEvent处理**/                mIsHorizontalMove = true;                // 获取当前手指位置                float endY = ev.getY();                float endX = ev.getX();                float distanceX = Math.abs(endX - startX);                float distanceY = Math.abs(endY - startY);                if (distanceX != distanceY) {                    // 如果X轴位移大于Y轴位移，那么将事件交给viewPager处理。                    if (distanceX > mTouchSlop && distanceX > distanceY) {                        mIsHorizontalMove = true;                        isDeal = true;                    } else if (distanceY > mTouchSlop) {                        mIsHorizontalMove = false;                        isDeal = true;                    }                }                break;            case MotionEvent.ACTION_UP:            case MotionEvent.ACTION_CANCEL:                //下拉刷新状态时如果滚动了viewpager 此时mIsHorizontalMove为true 会导致PtrFrameLayout无法恢复原位                // 初始化标记,                mIsHorizontalMove = false;                isDeal = false;                break;        }        if (mIsHorizontalMove) {            return dispatchTouchEventSupper(ev);        }        return super.dispatchTouchEvent(ev);    }}