Cocos2d-x onTouchMoved在没有移动发生时调用

我正在编写一个cocos2d-x 3.71跨平台应用(ios, android, windows10)，我在android上执行触摸和按住检测时遇到了麻烦(ios和windows工作得很好)。我已经追踪到这一点的原因归结为这样一个事实，即当按住触摸而不移动时，onTouchMoved()不断发射。我已经合并了一个解决方案，但这似乎是一个错误，我想知道是否有人有任何想法。

我在一个基于cocos2d-x HelloWorld示例的最小应用程序中重现了这个问题。我只是从cocos2d::Node (testNode)派生了一个类，并创建了它，并将其作为子类添加到HelloWorldScene中。在testNode中，我覆盖了更新函数并使用scheduleUpdate()从onTouchBegan()调度它。在update()函数中，我只是计算时间，直到达到0.25秒，然后使用unscheduleUpdate()禁用更新。我有另一个unscheduleUpdate()调用onTouchMoved()停止计数保持时间，以防触摸移动。问题是，在Android上，当触摸静止不动时，onTouchMoved()开始不断触发。

testNode.h: 
#pragma once
#include "cocos2d.h"
class testNode : public cocos2d::Node
{
public:
    testNode() {}
    ~testNode() {}
    CREATE_FUNC(testNode);
    virtual bool init();
    virtual void update(float dt);
    bool onTouchBegan(cocos2d::Touch*, cocos2d::Event*);
    void onTouchMoved(cocos2d::Touch*, cocos2d::Event*);
    void onTouchEnded(cocos2d::Touch*, cocos2d::Event*);
    void onTouchCancelled(cocos2d::Touch*, cocos2d::Event*);
private:
    cocos2d::DrawNode* d;
    int id;
    bool touchIsDown;
    float touchTime;
    cocos2d::Label *messageLabel;
    cocos2d::Vec2 center;
};

testNode.cpp:

#include "testNode.h"
USING_NS_CC;
bool testNode::init()
{
    if (!Node::init())
    {
        return false;
    }
    setContentSize(Size(50, 50));
    Size size = Director::getInstance()->getWinSize();
    Size visibleSize = Director::getInstance()->getVisibleSize();
    setPosition(Vec2(size.width / 2.0f, size.height / 2.0f));
    center.x = size.width / 2.0f;
    center.y = size.height / 2.0f;
    d = DrawNode::create();
    addChild(d, 10);
    d->drawCircle(Vec2(0, 0), 50, (float)M_PI * 2, 50, false, Color4F::RED);
    auto touchListener = EventListenerTouchOneByOne::create();
    touchListener->setSwallowTouches(true);
    touchListener->onTouchBegan = CC_CALLBACK_2(testNode::onTouchBegan, this);
    touchListener->onTouchEnded = CC_CALLBACK_2(testNode::onTouchEnded, this);
    touchListener->onTouchMoved = CC_CALLBACK_2(testNode::onTouchMoved, this);
    touchListener->onTouchCancelled = CC_CALLBACK_2(testNode::onTouchCancelled, this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(touchListener, this);
    messageLabel = Label::createWithTTF("Hello World", "fonts/Marker Felt.ttf", 18);
    Vec2 origin = Director::getInstance()->getVisibleOrigin();
    messageLabel->setPosition(Vec2(0,0));
    addChild(messageLabel, 1);
    return true;
}
void testNode::update(float deltaTime)
{
    // When update is scheduled with scheduleUpdate(), this will increment the touchtimer
    // used for differenciating different touch actions.
    if (touchIsDown)
    {
        touchTime += deltaTime;
        if (touchTime > 0.25)
        {
            unscheduleUpdate();
        }
    }
}
bool testNode::onTouchBegan(Touch* touch, Event* event)
{
    Vec2 touchPoint = touch->getLocation();
    float startDistFromCenter = center.getDistance(touchPoint);
    touchTime = 0.0f;
    // Handle touch only if inside the radius of the circle
    if (startDistFromCenter <= 50)
    {
        // Track how long the touch is held without moving or releasing
        touchIsDown = true;
        scheduleUpdate();
        return true;
    }
    else
        return false;
}
void testNode::onTouchMoved(Touch* touch, Event* event)
{
    Vec2 pos = touch->getLocation();
    log("moving...pos = %f , %f", pos.x, pos.y);
    touchIsDown = false;
    unscheduleUpdate();
}
void testNode::onTouchEnded(Touch* touch, Event* event)
{
    touchIsDown = false;
    unscheduleUpdate();
    log("Hold Time: %f", touchTime);
}
void testNode::onTouchCancelled(Touch* touch, Event* event)
{
}

---

触摸/按住事件的典型输出:

09-23 23:42:39.852: D/cocos2d-x debug info(32508):startDistFromCenter: 33.753014 09-23 23:42:39.902: D/cocos2d-x debug信息(32508):移动……Pos = 246.732849, 126.925316 09-2323:42:39.902: D/cocos2d-x debug info(32508): moving…Pos = 246.732849， 126.925316 09-23 23:42:39.920: D/cocos2d-x调试信息(32508):移动……pos = 246.732849, 126.925316 09-23 23:42:39.935: D/cocos2d-x调试信息(32508):moving…Pos = 246.732849, 126.925316 09-2323:42:39.969: D/cocos2d-x debug info(32508): moving…Pos = 246.732849， 126.925316 09-23 23:42:39.969: D/cocos2d-x调试信息(32508):移动……pos = 246.732849, 126.925316 09-23 23:42:39.989: D/cocos2d-x调试信息(32508):moving…Pos = 246.732849, 126.925316 09-2323:42:39.999: D/cocos2d-x debug info(32508): moving…Pos = 246.732849， 126.925316 09-23 23:42:40. 0.027: D/cocos2d-x调试信息(32508):移动……pos = 246.732849, 126.925316 09-23 23:42:40.043: D/cocos2d-x调试信息(32508):moving…Pos = 246.732849, 126.925316 09-2323:42:40.043: D/cocos2d-x debug info(32508): Hold Time: 0.042597

可以看到，位置是而不是实际移动....到底发生了什么事?

作为参考，我在Windows 10, Visual Studio 2015, cocos2d-x 3.71上进行开发，并在Android 5.1.1 (OnePlusOne手机)上进行测试

09-24 11:51:25.351: D/cocos2d-x debug info(1058): Hold Time: 0.252129
09-24 11:51:27.361: D/cocos2d-x debug info(1058): Hold Time: 0.251298
09-24 11:51:28.711: D/cocos2d-x debug info(1058): Hold Time: 0.252115
09-24 11:51:30.101: D/cocos2d-x debug info(1058): Hold Time: 0.251961