Android AChartEngine 饼图渐变效果

二话不说,先上图

Android AChartEngine 饼图渐变效果

核心代码如下:

private void initLabelChat(View rootView) {
NumberFormat nf = new DecimalFormat("#.# 小时"); final DefaultRenderer renderer = new DefaultRenderer();
final CategorySeries series = new CategorySeries(""); LinearLayout layout = (LinearLayout) rootView
.findViewById(R.id.pie_statistic_by_label);
final GraphicalView chartView = ChartFactory.getPieChartView(
getActivity(), series, renderer); chartView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SeriesSelection seriesSelection = chartView
.getCurrentSeriesAndPoint();
if (seriesSelection == null) {
/*
* Toast.makeText(getActivity(),
* "No chart element selected", Toast.LENGTH_SHORT) .show();
*/
} else {
for (int i = 0; i < series.getItemCount(); i++) {
renderer.getSeriesRendererAt(i).setHighlighted(
i == seriesSelection.getPointIndex());
}
chartView.repaint();
}
}
}); renderer.setClickEnabled(true);
renderer.setPanEnabled(false);
renderer.setDisplayValues(false); layout.addView(chartView, new LayoutParams(700, 700)); renderer.setZoomButtonsVisible(false);
renderer.setZoomEnabled(false);
renderer.setDisplayValues(true);
renderer.setShowLegend(false); renderer.setLabelsTextSize(30f);
renderer.setLabelsColor(Color.DKGRAY);
renderer.setShowGrid(true);
renderer.setAntialiasing(true); series.add("样本1", 5); SimpleSeriesRenderer seriesRenderer = new SimpleSeriesRenderer();
seriesRenderer.setGradientEnabled(true);
seriesRenderer.setChartValuesFormat(nf);
seriesRenderer.setGradientStart(0, Color.rgb(0x04, 0xa3, 0xff));
seriesRenderer.setGradientStop(0.8, Color.rgb(0x00, 0x89, 0xd8));
seriesRenderer.setDisplayChartValues(false);
renderer.addSeriesRenderer(seriesRenderer); series.add("样本2", 8); seriesRenderer = new SimpleSeriesRenderer();
seriesRenderer.setGradientEnabled(true);
seriesRenderer.setChartValuesFormat(nf);
seriesRenderer.setGradientStart(0, Color.rgb(0xff, 0xb0, 0x0d));
seriesRenderer.setGradientStop(0.8, Color.rgb(0xce, 0x97, 0x00));
seriesRenderer.setDisplayChartValues(false);
renderer.addSeriesRenderer(seriesRenderer); series.add("样本3", 6); seriesRenderer = new SimpleSeriesRenderer();
seriesRenderer.setGradientEnabled(true);
seriesRenderer.setChartValuesFormat(nf);
seriesRenderer.setGradientStart(0, Color.rgb(0x00, 0xbc, 0x66));
seriesRenderer.setGradientStop(0.8, Color.rgb(0x01, 0x80, 0x46));
seriesRenderer.setDisplayChartValues(false);
renderer.addSeriesRenderer(seriesRenderer); series.add("样本4", 3); seriesRenderer = new SimpleSeriesRenderer();
seriesRenderer.setGradientEnabled(true);
seriesRenderer.setChartValuesFormat(nf);
seriesRenderer.setGradientStart(0, Color.rgb(0xff, 0x6e, 0xf6));
seriesRenderer.setGradientStop(0.8, Color.rgb(0xff, 0x00, 0xde));
seriesRenderer.setDisplayChartValues(false);
renderer.addSeriesRenderer(seriesRenderer); chartView.repaint();
}
其实很简单,设置渐变开启,然后设置渐变颜色即可

seriesRenderer.setGradientEnabled(true);
seriesRenderer.setGradientStart(0, Color.rgb(0x04, 0xa3, 0xff));
seriesRenderer.setGradientStop(0.8, Color.rgb(0x00, 0x89, 0xd8)); 其中还有一个设置饼图值的方法,需要先创建一个NumberFormat
NumberFormat nf = new DecimalFormat("#.# 小时");

然后调用下面的方法即可
seriesRenderer.setChartValuesFormat(nf);
 
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