achartengine组合的时间图和ScatterChart, x轴日期。

I have created a graph where tamperatures are displayed in a timeChart. I needed to mark a few temperatures with different color, so I used a XYCombinedChart and added a ScatterChar with the temperatures I wanted to mark. It all worked well. The only problem is that, in order to make it work, I used milliseconds in ScatterCharts's XYSeries like shown below:I have created a graph where tamperatures are d