Pie Chart: how to display text just on some pie slices using AChartEngine Android library?

Question

I'm using AChartEngine (http://code.google.com/p/achartengine/) library to display a pie chart in an Android app.

The pie chart can have lots of slides. I want to display just on some pie slices the values, but I could not make it work (I'm not even sure it is possible).

For the DefaultRenderer I've made:

renderer.setLabelsColor(Color.BLACK);  // color of the text displayed on the chart
renderer.setLabelsTextSize(12); // size of the text displayed on the chart

and for each SimpleSeriesRenderer:

if (pieSlidesNo > 5) {
    serieRender.setDisplayChartValues(false);
} else {
    serieRender.setDisplayChartValues(true);
}

but is not working - the values are displayed on each pie slice. What I want is like in the below image (the values are displayed only on first slices, not on all).

Answer 1

For this you have to change Library Source.

Make change in draw() of PieChart.java and use renderer.setDisplayValues(true); of DefaultRenderer

 if (mRenderer.isDisplayValues()) {
        if(angle<60)
        {}
        else
        drawLabel(
            canvas,
            getLabel(mRenderer.getSeriesRendererAt(i).getChartValuesFormat(), mDataset.getValue(i)),
            mRenderer, prevLabelsBounds, mCenterX, mCenterY, shortRadius / 2, longRadius / 2,
            currentAngle, angle, left, right, mRenderer.getLabelsColor(), paint, false, true);
      }

you can change angle comparison value (angle<60) according to ur requirement.