Hello

In last Post  we check how to hide buttons in layout In this post i want to show you how to create bar chart in android using Achartengine . Achartengine is  charting software library for Android applications. Mobile phones, tablets and other gadgets running Android will probably benefit of this charting library.

you can check more for Achartengine            http://www.achartengine.org/content/demo.html

and all the source code available here  for  Achartengine    http://www.achartengine.org/download/

This is the tested code for bar graph it is the best graph I like it very much here is code...

package com.tapt.combinedtest; 

import java.util.ArrayList;

import java.util.List;

 

import org.achartengine.ChartFactory;

import org.achartengine.GraphicalView;

import org.achartengine.chart.BarChart;

import org.achartengine.chart.LineChart;

import org.achartengine.chart.PointStyle;

import org.achartengine.model.XYMultipleSeriesDataset;

import org.achartengine.model.XYSeries;

import org.achartengine.renderer.XYMultipleSeriesRenderer;

import org.achartengine.renderer.XYSeriesRenderer;

 

import android.graphics.Color;

import android.graphics.Paint.Align;

import android.app.Activity;

import android.os.Bundle;

import android.widget.RelativeLayout;

 

 

public class CombinedTrial extends Activity {

 

     

     

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

 

         

           

final GraphicalView gv =createIntent();

 

 

 

        RelativeLayout rl=(RelativeLayout)findViewById(R.id.graph);

        rl.addView(gv);

        

 

         

         

    }

     

    

    public GraphicalView createIntent() {

        String[] titles = new String[] { "Target"};

         

        double[] y1 =new double[] { 20,30,10,40,50,20,10,30,30,40,45,25};

        double barview = 12;int maxvalue=60;

         

        String[] x1=new String[] {"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};

         

         

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

        for (int i = 0; i < titles.length; i++) {

          x.add(new double[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 });

        }

         

         

        if(maxvalue==0){

             

            maxvalue=10000;

        }

         

 

         

        //Line Portion//

        //======================================================================

         

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

        values.add(new double[] { 20,20,20,20,20,20,20,20,20,20,20,20});

 

        //=======================================================================

         

         

         

        int[] colors = new int[] { Color.GREEN};

        PointStyle[] styles = new PointStyle[] { PointStyle.CIRCLE};

        XYMultipleSeriesRenderer renderer = buildRenderer(colors, styles);

        renderer.setPointSize(0);

        int length = renderer.getSeriesRendererCount();

 

        for (int i = 0; i < length; i++) {

          XYSeriesRenderer r = (XYSeriesRenderer) renderer.getSeriesRendererAt(i);

          r.setLineWidth(5);

          r.setFillPoints(true);

        }

        setChartSettings(renderer, "Sales Reports", "", "Amount (Rs)", 0.5, barview, 0, maxvalue,

            Color.LTGRAY, Color.LTGRAY,x1);

 

        renderer.setXLabels(0);

        renderer.setYLabels(10);

        renderer.setShowGrid(true);

        renderer.setXLabelsAlign(Align.RIGHT);

        renderer.setYLabelsAlign(Align.RIGHT);

        renderer.setZoomButtonsVisible(false);

         

        renderer.setClickEnabled(true);

 

         

         

         

 

        XYSeries waterSeries = new XYSeries("Sales");

        waterSeries.add(1, y1[0]);

        waterSeries.add(2, y1[1]);

        waterSeries.add(3, y1[2]);

        waterSeries.add(4, y1[3]);

        waterSeries.add(5, y1[4]);

        waterSeries.add(6, y1[5]);

        waterSeries.add(7, y1[6]);

        waterSeries.add(8, y1[7]);

        waterSeries.add(9, y1[8]);

        waterSeries.add(10, y1[9]);

        waterSeries.add(11, y1[10]);

        waterSeries.add(12, y1[11]);

        renderer.setBarSpacing(0.5);

        XYSeriesRenderer waterRenderer = new XYSeriesRenderer();

        waterRenderer.setColor(Color.argb(250, 0, 210, 250));

 

        XYMultipleSeriesDataset dataset = buildDataset(titles, x, values);

        dataset.addSeries(0, waterSeries);

        renderer.addSeriesRenderer(0, waterRenderer);

        waterRenderer.setDisplayChartValues(true);

        waterRenderer.setChartValuesTextSize(10);

 

        String[] types = new String[] { BarChart.TYPE, LineChart.TYPE};

        final GraphicalView grfv = ChartFactory.getCombinedXYChartView(this, dataset, renderer, types);

         

 

         

         

         

         

        return grfv;

      }

     

     

     

     

    protected static XYMultipleSeriesRenderer buildRenderer(int[] colors, PointStyle[] styles) {

        XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();

        setRenderer(renderer, colors, styles);

        return renderer;

      }

     

    protected static void setRenderer(XYMultipleSeriesRenderer renderer, int[] colors, PointStyle[] styles) {

        renderer.setAxisTitleTextSize(16);

        renderer.setChartTitleTextSize(20);

        renderer.setLabelsTextSize(12);

        renderer.setLegendTextSize(15);

        renderer.setPointSize(5f);

        renderer.setMargins(new int[] { 35, 65, 10, 15 });

        int length = colors.length;

        for (int i = 0; i < length; i++) {

          XYSeriesRenderer r = new XYSeriesRenderer();

          r.setColor(colors[i]);

          r.setPointStyle(styles[i]);

          renderer.addSeriesRenderer(r);

         

        }

      }

     

    protected static void setChartSettings(XYMultipleSeriesRenderer renderer, String title, String xTitle,

              String yTitle, double xMin, double xMax, double yMin, double yMax, int axesColor,

              int labelsColor,String[] x1) {

            renderer.setChartTitle(title);

            renderer.isClickEnabled();

            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.setXLabelsAngle(-90);

             

 for(int i=1;i<=((x1.length));i++){

                 

                 

                renderer.addXTextLabel(i, x1[(i-1)]);  

                 

                 

            }

             

             

          }  

     

     

     

    protected static XYMultipleSeriesDataset buildDataset(String[] titles, List<double[]> xValues,

              List<double[]> yValues) {

            XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();

            addXYSeries(dataset, titles, xValues, yValues, 0);

            return dataset;

          }

     

     

    public static void addXYSeries(XYMultipleSeriesDataset dataset, String[] titles, List<double[]> xValues,

              List<double[]> yValues, int scale) {

            int length = titles.length;

            for (int i = 0; i < length; i++) {

              XYSeries series = new XYSeries(titles[i], scale);

              double[] xV = xValues.get(i);

              double[] yV = yValues.get(i);

              int seriesLength = xV.length;

              for (int k = 0; k < seriesLength; k++) {

                series.add(xV[k], yV[k]);

              }

              dataset.addSeries(series);

            }

          }

       

}