Making Concentric Pie Chart in Android

Question

Today I am come across a problem in Drawing out Graph in Android Pro-grammatically. I am Using Achartengine graph library for achieving this , I have done with simple pie chart , But I have no clue how to make Concentric pie chart using this .

Here is a demo Image of graph which I want to make.

Thanx for help in advance :)

Answer 1

Here is the example, first create a LinearLayout in your view(xml) and get it in your activityto pass it SingleDonutGraph class to draw a donut graph on this layout.You also have to pass graphValues[]as double array(the value you have to set on donut graph).

LayoutToDisplayChartLeftGraph = (LinearLayout) findViewById(R.id.right_graph_for_punch_count);
Intent achartIntentLeft = new SingleDonutGraph().execute(TabletPunchCountActivity.this, LayoutToDisplayChartLeftGraph,graphValues);

Then use this class SingleDonutGraph.java

public class SingleDonutGraph {
private GraphicalView mChartView2;
static int count = 3;

int[] Mycolors = new int[] { Color.parseColor("#F2846B"),
        Color.parseColor("#A01115"), Color.parseColor("#741E1E") };
String[] labels = { "TODAY", "AVERAGE", "TOTAL" };


public Intent execute(Context context, LinearLayout parent,double values[]) {
    parent.removeAllViews();
    int[] colors = new int[count];
    for (int i = 0; i < count; i++) {
        colors[i] = Mycolors[i];
    }
    DefaultRenderer renderer = buildCategoryRenderer(colors);
    renderer.setShowLabels(false);
    renderer.setBackgroundColor(Color.BLACK);
    renderer.setPanEnabled(false);// Disable User Interaction
    renderer.setScale((float) 1.4);
    renderer.setInScroll(true); //To avoid scroll Shrink        
    renderer.setStartAngle(90);
    renderer.setShowLegend(false);


    MultipleCategorySeries categorySeries = new MultipleCategorySeries(
            "Punch Graph");
    categorySeries.add(labels, values);

    mChartView2 = ChartFactory.getDoughnutChartView(context,
            categorySeries, renderer);

    parent.addView(mChartView2);

    return ChartFactory.getDoughnutChartIntent(context, categorySeries,
            renderer, null);
}

protected DefaultRenderer buildCategoryRenderer(int[] colors) {
    DefaultRenderer renderer = new DefaultRenderer();
    for (int color : colors) {
        SimpleSeriesRenderer r = new SimpleSeriesRenderer();
        r.setColor(color);
        renderer.addSeriesRenderer(r);

    }
    return renderer;
}
}