如何使用带有快速传入数据的AChartEngine绘制没有尖峰的线

Question

概述

应以非常快的方式（10ms）将三个信号绘制为图形中的线。大多数情况下，图表显示三个斜坡没有任何错误。有时在这些坡道上有尖峰。这就是我创造的：

• activity_temp_linegraph.xml：包含图表的属性
• DynamicLineGraphActivity： setContentView（） to activity_temp_linegraph
• DynamicLineGraph： initDataset（）并设置积分

---

问题

事实证明，大部分时间坡道看起来都很好。有时似乎存在竞争条件，并且斜坡上有尖峰。这些尖峰来自哪里？

---

的 DynmicLineGraph

private void initDataset() {
    mData0 = new TimeSeries(graphName1);
    ... // add more grapNames

    mDatasets = new XYMultipleSeriesDataset();
    mDatasets.addSeries(mData0);
    ... // add mData1 and mData2
}

private void initRenderer(Context context) {

   mRenderer0 = new XYSeriesRenderer();
   ... //setAttributes for example: setColor()

   mMultiRenderer = new XYMultipleSeriesRenderer();
   ... // setAttributes for example: setXTitle()

  mMultiRenderer.addSeriesRenderer(mRenderer0);
}

 // the code in the other addPointAndRepaint1-2 is the same
 public void addPointAndRepaint(PointXY p) {
   addPoint(p, mData2);
        repaint();

}

private synchronized void addPoint(PointXY p, TimeSeries mData) {

    mData.add(p.getX(), p.getY());

    // move XAxis boundaries if plot would exceed the right border
    if (p.getX() >= mXAxisMax) {  

        mXAxisMin = mXAxisMin + (p.getX() - mLastXvalue);
        mMultiRenderer.setXAxisMin(mXAxisMin);

        mXAxisMax = mXAxisMax + (p.getX() - mLastXvalue);
        mMultiRenderer.setXAxisMax(mXAxisMax);

    }
    mLastXvalue = p.getX();
   }

} // end addPoint 

---

带线程的模拟数据

我用线程尝试了它，它绘制线性上升线。但即便如此，也有尖峰。

@Override
public void onStart() {
    super.onStart();  

    Thread thread = new Thread() {

        long initTimestamp = System.currentTimeMillis();

        public void run() {
            for (int i = 0; i < 10000; ++i) {
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                if (runB) {
                    t += 0.1;
                    t = (System.currentTimeMillis()- initTimestamp)/1000.0;

                    simVal+=0.1;

                    if (simVal>9) 
                        simVal=-6;

                    PointXY p0 = new PointXY(t     , simVal-2);
                    PointXY p1 = new PointXY(t+0.02, simVal-1);
                    PointXY p2 = new PointXY(t+0.04, simVal);

                    mLineGraph.addPointAndRepaint(p0);
                    mLineGraph.addPointAndRepaint1(p1);
                    mLineGraph.addPointAndRepaint2(p2);
                } } } };
    thread.start();
}

---

我该怎么办？故障在哪里？

---

编辑＃1：

每一行都应该是一致的信号输出。