根据数据库数据画饼图

来源：互联网发布：淘宝话费充值代理编辑：程序博客网时间：2024/05/22 01:26
数据库传入数据为（分类、该分类下消费金额）
效果图：
private HashMap<String,Integer> getMonthData(){HashMap<String,Integer> map = new HashMap<String,Integer>();ArrayList<String>kindlist = (ArrayList<String>) kdao.find();for(int i=0;i<kindlist.size();i++){int kindsum = mdao.findSumOfKind(application.getUser_id(),kindlist.get(i),null,(String) year_pic_time.getText());map.put(kindlist.get(i),kindsum);}yearDataMap = map;return map;}/** *  画饼图 */private void CreatePicBingTu(){year_pic.removeAllViews();CategorySeries dataset=buildCategoryDataset("月统计饼图", getMonthData());ArrayList<Integer>colors = new ArrayList<Integer>();colors.add(Color.BLACK);colors.add(Color.BLUE);colors.add(Color.GRAY);colors.add(Color.DKGRAY);colors.add(Color.RED);colors.add(Color.GREEN);ArrayList<Integer> colorlist= new ArrayList<Integer>();for(int i=0;i<yearDataMap.size();i++){colorlist.add(colors.get(i));}DefaultRenderer renderer=buildCategoryRenderer(colorlist);graphicalView=ChartFactory.getPieChartView(getBaseContext(), dataset, renderer);//饼状图year_pic.addView(graphicalView);}protected CategorySeries buildCategoryDataset(String title, HashMap<String, Integer> map) {                 CategorySeries series = new CategorySeries(title);         Set set = map.entrySet();         Iterator it = set.iterator();                  Double sum = 0.0;         while(it.hasNext())         {         java.util.Map.Entry entry = (java.util.Map.Entry)it.next();         sum+=Double.parseDouble(entry.getValue().toString());         }                  it = set.iterator();         while(it.hasNext())         {         double hundred;         java.util.Map.Entry entry = (java.util.Map.Entry)it.next();         String key = entry.getKey().toString();         double value = Double.parseDouble(entry.getValue().toString());         if(sum>0)         {         hundred = value/sum*100;                  series.add(key+"  "+doubleFormat.format(hundred)+"%",value);         }         else series.add(key+"  "+"0%",value);         }     return series;}protected DefaultRenderer buildCategoryRenderer(ArrayList<Integer> colorlist) {         DefaultRenderer renderer = new DefaultRenderer();                  renderer.setLegendTextSize(23);//设置左下角表注的文字大小          renderer.setLabelsTextSize(28.0f);         renderer.setMargins(new int[] { 20, 30, 15,0 });         //margins - an array containing the margin size values, in this order: top, left, bottom, right         for (int i=0;i<colorlist.size();i++)          {           SimpleSeriesRenderer r = new SimpleSeriesRenderer();           r.setColor(colorlist.get(i));           renderer.addSeriesRenderer(r);         }         return renderer;    }
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