Question

In my project i have to display the bar chart for 30 days with daily net amount. While view of bar chart activity the X-axis labels were collapsed and all are *shown* without any spacing. While i clicked the zoom buttons that time the views are expanded and we can see the bar with their corresponding x-axis labels. I need to show the bar chart on expanded view on the time of activity started.

Coding for display the Bar Chart:

     XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
        renderer.setAxisTitleTextSize(16);
        renderer.setChartTitleTextSize(20);
        renderer.setLabelsTextSize(15);
        renderer. setLegendTextSize(15);
//     renderer.setInScroll(true);
        //renderer.setMargins(new int[]{10,10,10,0});
        int length = colors.length;
        for (int j = 0; j < length; j++) {
          SimpleSeriesRenderer r = new SimpleSeriesRenderer();
          r.setColor(colors[j]);
          renderer.addSeriesRenderer(r);
        }
        if(flag==1)
     renderer.setChartTitle("Monthly Basis");
        if(flag==0)
             renderer.setChartTitle("Weekly Basis");
        if(flag==2)
             renderer.setChartTitle("Yearly Basis");
    renderer.setXTitle("Date");
    renderer.setYTitle("NetAmount");

    renderer.setXAxisMin(0);

    //renderer
    renderer.setYAxisMin(100);
   // renderer.setYAxisMax(35000);
    renderer.setAxesColor(Color.GRAY);
    renderer.setLabelsColor(Color.LTGRAY);
          renderer.setXLabels(0);
          //renderer.setYLabels(31);
            renderer.setDisplayChartValues(true);
            renderer.setXLabelsAlign(Align.LEFT);
            renderer.setYLabelsAlign(Align.RIGHT);
          if(flag==0 || flag==1)
          {
             for(int axis=1;axis<=31;axis++)
            {
                String d;
                d=String.valueOf(axis);
                renderer.addTextLabel(axis,d);

            }
          }
          else
          {
              renderer.setXAxisMin(2005);
              for(int axis=2005;axis<=2011;axis++)
                {
                    String d;
                    d=String.valueOf(axis);
                    renderer.addTextLabel(axis,d);

                }

             // renderer.setXLabels(4);
          }
             //renderer.setPanEnabled(false,false);
             //renderer.setZoomEnabled(false,false);
           // renderer.setPanLimits(new double[] { 0, 32, -10, 40 });
          // renderer.setZoomLimits(new double[] { 0, 32, -10, 40 });
            renderer.setZoomRate(3.0f);
            renderer.setBarSpacing(0.25);
            //renderer.set(new  double[] {0,30,100,35000});
            //Intent in;

            List<double[]> xvalues = new ArrayList<double[]>();

            int count=1,j=0;
           if(flag==0 || flag==1)
           {
            double xdata[]=new double[31];
            while(count<32)
            {

            xdata[j]=count;
            count++;
            j++;

            }
            xvalues.add(xdata);
           }
           if(flag==2)
           {
            double xdata[]=new double[7];
            count=2005;
            while(j<7)
            {

            xdata[j]=count;
            count++;
            j++;

            }
            xvalues.add(xdata);
           }


          //  return ChartFactory.getBarChartIntent(context, buildBarDataset(titles,xvalues,values), renderer,
            //    Type.DEFAULT);
            mchart=ChartFactory.getBarChartView(context,buildBarDataset(titles,xvalues,values), renderer, Type.STACKED);
            //LinearLayout layout = (LinearLayout) findViewById(R.id.chart1);
            layout.addView(mchart);
            mchart.repaint();

            //startActivity(in);

  }


     protected XYMultipleSeriesDataset buildBarDataset(String[] titles, List<double[]> xvalues, List<double[]> values) {
    XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
     int length = titles.length;
     for (int i = 0; i < length; i++) {
    //CategorySeries series = new CategorySeries(titles[i]);
XYSeries series = new XYSeries(titles[i]);
double[] v = values.get(i);
double[]x=xvalues.get(i);

int seriesLength = v.length;
    for (int k = 0; k < seriesLength; k++) {
if(v[k]==0)
{
v[k]=MathHelper.NULL_VALUE;
}
else
{
     series.add(x[k],v[k]);
}
      //Log.i("Invent","X Axis"+x[k]);
//series.add(xdata[k],v[k]);
     }
     dataset.addSeries(series);
    for (int k = 0; k < seriesLength; k++) {
if(v[k]==MathHelper.NULL_VALUE)
{
v[k]=0;
}
     }
    }
   return dataset;
       }


}

Answer 1

I’m not 100% sure but here goes a shot.

First you seems to use a deprecated method addTextLabel when current suggested is addXTextLabel.

Secondly you set setXLabels(0); with seems odd as you are going to have more then 0 XLabels also unsure how this will work with the depreciated method used.

Thirdly I think the X value in the addTextLabel are actually, a position not a bar index.

I’m no expert in neither aChartEngine or have time to test your code just now. I will do some testing later tonight and edit this answer with the result. If no other answer helps you.

(edit)

After testing your code I get this result:

This is a problem that is solvable in 3 ways:

• Reduce the number of labels, e.g. only printing ever other.
• Use a smaller font size for the labels, I think this will be hard in this case, as I think the readability will suffer greatly.
• Try to make the axis longer by e.g. removing the labels on the other axis. I guess you want to show labels for the amount there so not useful here.

I have made a very simple and naive implementation of skipping ever other as I think that is the most useful solution here.

for(int axis=1;axis<=31;axis++)
{
  if(axis%2 == 1){
    String d;
    d=String.valueOf(axis);
    renderer.addTextLabel(axis,d);
  }
}

The result looks like this:

Hope this helps!

(edit again)

New understanding of the question the above is still correct but here is the answer to the question as I under stand it now.

To get pan to work you need to have pan enabled (already done in this question) and then set xAxisMax to something less then the length of the dataset. In this example it’s easiest to just set it to e.g. 15f this is done like this:

renderer.setXAxisMax(15.0f);

Hope this is what you wanted.