Question

我希望在用户点击时突出显示（更改颜色）饼图特定切片。我可以在样本（下面的代码）中找到可以显示切片的索引和确切的点。但是重新着色切片呢？

mChartView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
          if (seriesSelection == null) {
            Toast
                .makeText(PieChartBuilder.this, "No chart element was clicked", Toast.LENGTH_SHORT)
                .show();
          } else {
            Toast.makeText(
                PieChartBuilder.this,
                "Chart element data point index " + seriesSelection.getPointIndex()
                    + " was clicked" + " point value=" + seriesSelection.getValue(),
                Toast.LENGTH_SHORT).show();
          }
        }
      });

Answer 1

这将完成你需要的东西：

mRenderer.getSeriesRendererAt(seriesSelection.getPointIndex()).setColor(color);
mChartView.repaint();

Answer 2

点击图表上的代码：

使用此：

mChartView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
          SeriesSelection seriesSelection = mChartView.getCurrentSeriesAndPoint();
          if (seriesSelection == null) {
            Toast.makeText(PieChartBuilder.this, "No chart element selected", Toast.LENGTH_SHORT)
                .show();
          } else {
            for (int i = 0; i < mSeries.getItemCount(); i++) {
              mRenderer.getSeriesRendererAt(i).setHighlighted(i == seriesSelection.getPointIndex());
            }
            mChartView.repaint();
            Toast.makeText(
                PieChartBuilder.this,
                "Chart data point index " + seriesSelection.getPointIndex() + " selected"
                    + " point value=" + seriesSelection.getValue(), Toast.LENGTH_SHORT).show();
          }
        }
      });

Answer 3

您还需要确保图表可以点击。我花了很长时间想知道为什么我无法让它工作。这条线

mRenderer.setClickEnabled(true);

应该包括

在AChartEngine中单击时突出显示饼图切片

3 个答案: