Question

I am right now trying to create a bar-chart in android using achartengine,hopefully i have created it,but here the problem is the bars which i have created are displaying too nearer with each bars, i need to show those bars with the below orders(ord1,ord2 etc,..) which are all on the x-axis?

Can any one please let me know the solution to over come this issue?

The following image will make clear,please find it

Please find my sources for reference

BarActivity.java

 public class BarActivity extends Activity 
 { 
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    Intent intent = createIntent();
    startActivity(intent);
}


 public Intent createIntent() 

 {

String[] titles = new String[] { "Order's profit of the year", " " };
List<double[]> values = new ArrayList<double[]>();
values.add(new double[] { 29, 83, 47, 33 });
values.add(new double[] {});

int[] colors = new int[] { Color.WHITE, Color.BLACK};

XYMultipleSeriesRenderer renderer = buildBarRenderer(colors);
renderer.setOrientation(Orientation.HORIZONTAL);

setChartSettings(renderer, "Profit for the year 2012", " ", " ", 0,100, 0,100, Color.GRAY, Color.LTGRAY);

renderer.setXLabels(1);
renderer.setYLabels(10);

renderer.addXTextLabel(10.75, "ord1");
renderer.addXTextLabel(20.75, "ord2");
renderer.addXTextLabel(30.75, "ord3");
renderer.addXTextLabel(40.75, "ord4");

int length = renderer.getSeriesRendererCount();
for (int i = 0; i < length; i++) 
{
  SimpleSeriesRenderer seriesRenderer = renderer.getSeriesRendererAt(i);
  seriesRenderer.setDisplayChartValues(true);
  }

return ChartFactory.getBarChartIntent(this, buildBarDataset(titles, values), renderer,Type.DEFAULT);
}

protected XYMultipleSeriesRenderer buildBarRenderer(int[] colors) 
{

// creates a SeriesRenderer and initializes it with useful default values as well as colors

    XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();

    renderer.setAxisTitleTextSize(16);

    renderer.setChartTitleTextSize(20);

    renderer.setLabelsTextSize(15);

    renderer.setLegendTextSize(15);

    int length = colors.length;

    for (int i = 0; i < length; i++) 
    {
      SimpleSeriesRenderer r = new SimpleSeriesRenderer();
      r.setColor(colors[i]);
      renderer.addSeriesRenderer(r);
    }
    return renderer;
  }

   protected void setChartSettings(XYMultipleSeriesRenderer renderer, String title, String xTitle,
   String yTitle, double xMin, double xMax, double yMin, double yMax, int axesColor,int labelsColor) 
  {

  // sets lots of default values for this renderer

   renderer.setChartTitle(title);

   renderer.setXTitle(xTitle);
   renderer.setYTitle(yTitle);

   renderer.setXAxisMin(xMin);
   renderer.setXAxisMax(xMax);

   renderer.setYAxisMin(yMin);
   renderer.setYAxisMax(yMax);

   renderer.setAxesColor(axesColor);
   renderer.setLabelsColor(labelsColor);

   renderer.setApplyBackgroundColor(true);
   renderer.setBackgroundColor(Color.BLACK);

}

protected XYMultipleSeriesDataset buildBarDataset(String[] titles, List<double[]> values) 
{

    // adds the axis titles and values into the dataset

    XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
    int length = titles.length;

    for (int i = 0; i < length; i++) 
    {
      CategorySeries series = new CategorySeries(titles[i]);
      double[] v = values.get(i);
      int seriesLength = v.length;
      for (int k = 0; k < seriesLength; k++) 
      {
        series.add(v[k]);
      }

      dataset.addSeries(series.toXYSeries());
     }
    return dataset;
    }
  }

Thanks for your precious time!..

Answer 1

You are calling setChartSettings with some parameters that set the X axis visual range between 0 and 100 and the same for the Y axis. You can tweak these parameters for having a better relaxed display.

You can also play with renderer.setBarSpacing() for tweaking the spacing between bars in a ber chart.