Android achartengine simple pie chart

I'm following an example in this link and created a class as below

public class aChartExample {

    public Intent execute(Context context) {
        int[] colors = new int[] { Color.RED, Color.YELLOW, Color.BLUE };
        DefaultRenderer renderer = buildCate开发者_运维技巧goryRenderer(colors);

        CategorySeries categorySeries = new CategorySeries("Vehicles Chart");
        categorySeries.add("cars ", 30);
        categorySeries.add("trucks", 20);
        categorySeries.add("bikes ", 60);

        return ChartFactory.getPieChartIntent(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;
    }
}

and I'm calling it when my app starts on my starting activity in the onCreate.

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mainpage);

    Intent achartIntent = new aChartExample().execute(this);
    startActivity(achartIntent);
}

I then included the achartengine-0.6.0.jar in my project.

When I run the app it crashes on the startActivity line.

Not sure where to go from here.

Did you add this below line in AndroidManifest.xml. If so can you post the error message, I tried the same example 2 days ago and worked for me.

<activity android:name="org.achartengine.GraphicalActivity"> 

startActivity takes only activities. Not for all classes.

final CategorySeries series = new CategorySeries("pie");

        for (int i = 0; i < Xaxes_value.size(); i++) {
            series.add(Xaxes_value.get(i) + "",
                    Long.parseLong(yaxes_value.get(i)));
        }


    List<Integer> colors = new ArrayList<Integer>();
    int[] colorr = { Color.parseColor("#56ADDB"),
            Color.parseColor("#F59331"), Color.parseColor("#73C83C"),
            Color.parseColor("#948D8B"), Color.parseColor("#E54273"),
            Color.parseColor("#FFD34E"), Color.parseColor("#2A86D6"),
            Color.parseColor("#00BFC0"), Color.parseColor("#95AC5F"),
            Color.parseColor("#FF8497") };

    for (int i = 0; i < yaxes_value.size(); i++) {
        colors.add(colorr[i]);

    }
    renderer = new DefaultRenderer();
    for (int color = 0; color < colors.size(); color++) {
        SimpleSeriesRenderer r = new SimpleSeriesRenderer();
        r.setColor(colors.get(color));
        r.setDisplayBoundingPoints(false);
        // r.setDisplayChartValuesDistance(20);
        r.setDisplayChartValues(false);
        r.setChartValuesTextSize(18);
        r.setStroke(BasicStroke.SOLID);
        renderer.addSeriesRenderer(r);
    }
    // renderer.isInScroll();

    renderer.setZoomEnabled(false);
    renderer.setPanEnabled(false);
    renderer.setZoomButtonsVisible(false); // set zoom button in Graph
    renderer.setApplyBackgroundColor(false);
    renderer.setBackgroundColor(Color.WHITE); // set background color
    renderer.setChartTitle("Pie Chart");
    renderer.setLabelsColor(Color.BLACK);
     renderer.setMargins(new int[] { 20, 100, 20, 15 });
    renderer.setLabelsTextSize(20);
    renderer.setChartTitleTextSize((float) 30);
    renderer.setShowLabels(false);
    renderer.setLegendTextSize(25);
    renderer.setDisplayValues(true);
    renderer.setStartAngle(90);
    GraphicalView mChart = ChartFactory.getPieChartView(getApplicationContext(), series,
            renderer);

    layout_graph.addView(mChart);