Android ---- bar chart and pie chart

Android ---- bar chart and pie chart

Use GraphicalView to draw a bar chart and a pie chart

 

1. Download The achartengine Library ,:

Www.bkjia.com

After the download is complete, paste the jar file to the libs folder.

Achartengine is a drawing tool library designed for Android.

Ii. How to use it in android Projects

First define a GraphicalView

GraphicalView graphicalView;

Then, obtain from chartfactory

 

GraphicalView = ChartFactory. getBarChartView (getBaseContext (), dataset, renderer, type); // bar chart graphicalView = ChartFactory. histogram (getBaseContext (), dataset, renderer); // pie chart

 

Dataset indicates the data source, renderer indicates the rendering parameter, and type indicates the type.

Set dataset method-pie chart

Double [] values = {412.0, 542.0, 486.0, 900.1}; CategorySeries dataset = buildCategoryDataset (test pie chart, values );

Protected CategorySeries buildCategoryDataset (String title, double [] values) {CategorySeries series = new CategorySeries (title); series. add (difference, values [0]); series. add (not up to standard, values [1]); series. add (compliant, values [2]); series. add (excellent, values [3]); return series ;}

How to Set dataset-bar chart can have multiple groups of data

 

1 String[] titles={test};2         List
 
   values=new ArrayList
  
   ();3         values.add(new double[]{5120.0,21251.0,25610.0});4         XYMultipleSeriesDataset dataset=buildBarDataset(titles, values);
  
 

protected XYMultipleSeriesDataset buildBarDataset(String[] titles, List
 
   values) {            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;        }
 

How to Set renderer-pie chart

 

 

1 int[] colors={Color.BLUE,Color.GREEN,Color.MAGENTA,Color.RED};2 DefaultRenderer renderer=buildCategoryRenderer(colors);

 

How to Set renderer-pie chart

Protected DefaultRenderer buildCategoryRenderer (int [] colors) {DefaultRenderer renderer = new DefaultRenderer (); renderer. setLegendTextSize (20); // set the text size of the table note in the lower left corner. // renderer. setZoomButtonsVisible (true); // you can specify the zoom-in or zoom-out button for renderer. setZoomEnabled (false); // The setting does not allow zoom in or out. renderer. setChartTitleTextSize (30); // set the text size of the chart title renderer. setChartTitle (statistical result); // set the title of the chart to show renderer at the top of the center by default. setLabelsTextSize (20); // font size of the text marked on the pie chart // renderer. setLabelsColor (Color. WHITE); // the color of the text marked on the pie chart renderer. setPanEnabled (false); // you can specify whether renderer can be translated. setDisplayValues (true); // whether to display the renderer value. setClickEnabled (true); // sets whether the renderer can be clicked. setMargins (new int [] {20, 30, 15, 0}); // margins-an array containing the margin size values, in this order: top, left, bottom, right for (int color: colors) {SimpleSeriesRenderer r = new SimpleSeriesRenderer (); r. setColor (color); renderer. addSeriesRenderer (r);} return renderer ;}

How to Set renderer-bar chart

 

 

Int [] colors = {Color. BLUE}; XYMultipleSeriesRenderer renderer = buildBarRenderer (colors); Type type = Type. DEFAULT; // renderer. setZoomEnabled (false); // how is it invalid? ---- use the following method to renderer. setZoomEnabled (false, false); // successful control -- setsetchartsettings (renderer, I am the title of the bar chart, statistical result, 0, 6, 0, 30000, Color. GRAY, Color. LTGRAY); renderer. getSeriesRendererAt (0 ). setDisplayChartValues (true); // renderer. getSeriesRendererAt (1 ). setDisplayChartValues (true); renderer. setXLabels (0); // set the number of subscripts on the X axis to renderer. setYLabels (10); // set the number of subscripts on the Y axis to renderer. setXLabelsAlign (Align. RIGHT); renderer. setYLabelsAlign (Align. LEFT); // the y-axis number indicates the coordinates or the right-side renderer. setPanEnabled (false, false); // you can specify whether to enable renderer translation. addXTextLabel (2.0, 220kv power line); // display text at specified coordinates // renderer. clearXTextLabels (); // clear labels // renderer. setZoomRate (1.1f); // sets the renderer. setBarSpacing (1f); // set the bar spacing // renderer. setLabelsTextSize (30); // you can specify the number size on the coordinate axis. setXLabelsAngle (300366f); // set the text rotation angle to rotate renderer clockwise. setXLabelsPadding (10); // set the distance between the text and the axis to renderer. setFitLegend (true); // adjust the proper position

protected XYMultipleSeriesRenderer buildBarRenderer(int[] 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;        }

Finally, put graphicalView in the specified layout.

1 layout=(LinearLayout)findViewById(R.id.linearlayout);2 layout.removeAllViews();3 layout.setBackgroundColor(Color.BLACK);4 layout.addView(graphicalView, new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));

Effect