Android的achartEngine如何突出特定的图表元素 [英] Android achartEngine how to highlight particular chart element

问题描述

我使用achartengine的饼图重新present我的实际销量，现在为我的应用程序启动图表元素在饼图中的一个应该得到强调的，当我们做饼图上的onclick等。

Hi i am using achartengine's pie-chart to represent my actual sales, now as my app starts one of the chart element in the piechart should get highlighted, like when we do the onclick on pie chart.

下面是code为我的饼图

Below is the code for my piechart

final DefaultRenderer renderer = buildCategoryRenderer(colors);
       renderer.setPanEnabled(false);// Disable User Interaction
       renderer.setLabelsColor(Color.BLACK);
       renderer.setShowLegend(true);
       renderer.setLegendTextSize(20);
       renderer.setInScroll(true);
       renderer.setStartAngle(180);

     renderer.setChartTitle("Sales By Market Segment- Month");
       renderer.setLabelsTextSize(22);
      final CategorySeries categorySeries = new CategorySeries("Sales");
       categorySeries.add("Craft1",  cursor.getInt(1));
             categorySeries.add("product1", cursor.getInt(2) );
              categorySeries.add("product2",  cursor.getInt(3) );
              categorySeries.add("product",  cursor.getInt(4));
              categorySeries.add("product1", cursor.getInt(5));

      mChartView2=ChartFactory.getPieChartView(context, categorySeries,renderer);
      parent.addView(mChartView2);
      renderer.setClickEnabled(true);
      mChartView2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
              SeriesSelection seriesSelection = mChartView2.getCurrentSeriesAndPoint();
              if (seriesSelection == null) {
                Toast.makeText(getActivity(), "No chart element selected", Toast.LENGTH_SHORT)
                    .show();
              }else {
                  for (int i = 0; i < categorySeries.getItemCount(); i++) {
                      renderer.getSeriesRendererAt(i).setHighlighted(i == seriesSelection.getPointIndex());
                    }
                  mChartView2.repaint();
                    Toast.makeText(
                        getActivity(),
                        "Chart data point index " + seriesSelection.getPointIndex() + " selected"
                            + " point value=" + seriesSelection.getValue(), Toast.LENGTH_SHORT).show();
                  }
                }
              });
      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;
      }

当点击

产品越来越突出，但我想强调一个产品，应用程序启动时。

products are getting highlighted when clicking but I want to highlight one product, when app starts.

推荐答案

找到了解决办法：

 mChartView2=ChartFactory.getPieChartView(context, categorySeries,renderer);
      parent.addView(mChartView2);
      renderer.getSeriesRendererAt(0).setHighlighted(true);
      mChartView2.repaint();

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