如何在AChartEngine中为CombinedXYChart设置X轴的日期格式

Question

i want to create a CombinedXYChartIntent, but i need the date format in the x Axis. I know how to make a simple TimeChartIntent.

  Intent intent = ChartFactory.getTimeChartIntent(context, dataset, mRenderer, "HH:mm");

but I can't do the same in the case of ComninedXYChart

I have read the following entry, but the way he has resolved it, does not work. There is no method setXLabelFormat() in the class XYMultipleSeriesRenderer.

How to set the Date Format for CombinedXYChart in AChartEngine?

I have basically exactly the same problem, maybe someone has found a way to set Date Format for X -Axis for CombinedXYChart.

Answer 1

I have already found myself a solution, and would like to introduce to you my solution approach.

public class LineGraph extends AbstractDemoChart {
      private static final long HOUR = 3600 * 1000;
      private static final long DAY = HOUR * 24;
      private static final int HOURS = 24;

    public Intent getIntent(Context context,double[] personCount, Date[] timeValue) {

        //Create XYSeries, fill it with 24 int Values for X-Axis and PersonCount for Y-Axis
        XYSeries series = new XYSeries("Test");
        for (int i = 0; i < timeValue.length; i++) {
            series.add(i, personCount[i]);
        }
        // Creating a dataset to hold each series
        XYMultipleSeriesDataset dataset =new XYMultipleSeriesDataset(); 
        dataset.addSeries(series);

        // Now I create the Series renderer
        XYSeriesRenderer renderer =new XYSeriesRenderer();
        renderer.setColor(Color.WHITE);

        /*last step, Creating the renderer that controls the full charts and add the   single renderer for each series */
        XYMultipleSeriesRenderer mRenderer =new XYMultipleSeriesRenderer();

        mRenderer.addSeriesRenderer(renderer);

        renderer.setPointStyle(PointStyle.SQUARE);
        renderer.setFillPoints(true);

        // Use DateFormatter for having X Labels in the form of HH:mm
        SimpleDateFormat formatter = new SimpleDateFormat("HH:mm");
        for (int i = 0; i < timeValue.length; i++) {
            // add custom Labels with correct format
            if(i%2==0){
                mRenderer.addXTextLabel(i, formatter.format(timeValue[i]));     
            }
        }
        mRenderer.setYLabels(10);
        mRenderer.setShowGrid(true);
        mRenderer.setXLabelsAlign(Align.CENTER);
        mRenderer.setYLabelsAlign(Align.RIGHT);
        // disable the default labels
        mRenderer.setXLabels(0);
        mRenderer.setShowCustomTextGrid(true);
        mRenderer.setZoomButtonsVisible(true);
        mRenderer.setPanLimits(new double[] { -10, 20, -10, 40 });
        mRenderer.setZoomLimits(new double[] { -10, 20, -10, 40 });
        mRenderer.setApplyBackgroundColor(true);
        mRenderer.setBackgroundColor(Color.BLACK);
        mRenderer.setChartTitle("Persons");


        Intent intent = ChartFactory.getCombinedXYChartIntent(context, dataset, mRenderer,  new String[]{BarChart.TYPE},
                    "Weather parameters");
        return intent;
    }

after doing this, my X-Axis has time Values in form of HH:mm

I hope this helps you further