安卓手机的web-view组件页内使用cover-view作浮窗按钮时，setData修改数据，页面不更新。ios正常·

<web-view src="">
  <cover-view class="show w" bindtap="userClose" bindtouchmove="buttonMove" bindtouchstart="buttonStart" style="top:{{buttonTop}}rpx;left:{{buttonLeft}}rpx;">
    <cover-image src="https://sales-dev.ihxlife.com/HuaPM_V/bcard/image/room/tool_show.png" class="user_show"></cover-image>
    <cover-view class="text">显示</cover-view>
  </cover-view>
</web-view>
js里setData修改buttonTop和buttonLeft，页面无变化，ios正常变化
    buttonStart: function (e) {
        console.log(777, e)
        this.setData({
            startPoint: e.touches[0]
        })
        //获取拖动开始点
    },
    buttonMove: function (e) {
        console.log(666, e)
        let rpx = this.data.rpx
        var endPoint = e.touches[e.touches.length - 1] //获取拖动结束点
        //计算在X轴上拖动的距离和在Y轴上拖动的距离
        var translateX = endPoint.pageX - this.data.startPoint.pageX
        var translateY = endPoint.pageY - this.data.startPoint.pageY
        this.setData({
            startPoint: endPoint
        }) //重置开始位置
        var buttonTop = this.data.buttonTop + translateY / rpx
        var buttonLeft = this.data.buttonLeft + translateX / rpx
        //判断是移动否超出屏幕
        if (buttonLeft + 90 >= this.data.windowWidth) {
            buttonLeft = this.data.windowWidth - 90;
        }
        if (buttonLeft <= 0) {
            buttonLeft = 0;
        }
        if (buttonTop <= 0) {
            buttonTop = 0
        }
        if (buttonTop + 138 >= this.data.windowHeight) {
            buttonTop = this.data.windowHeight - 138;
        }
        this.setData({
            // show: !this.data.show,
            buttonTop: buttonTop,
            buttonLeft: buttonLeft,
        }, () => {
            this.setData({
                // show: !this.data.show,
            })
        })
        console.log(233444555,this.data.buttonTop,this.data.buttonLeft)


    },

这是代码片段链接：https://developers.weixin.qq.com/s/TUsv4omI7WH3