MPAndroidChart 介绍
MPAndroidChart 是 Android 系统上一款开源的图表库。目前提供线图和饼图，支持选择、缩放和拖放。
示例代码：
LineData ld = new LineData(...); LimitLine ll = new LimitLine(140f); ll.setLineColor(Color.RED); ll.setlinewidth(4f); // .. and more styling options ld.addLimitLine(ll);
图表类型:
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LineChart (with legend, simple design)
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LineChart (with legend, simple design)
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LineChart (single DataSet)
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BarChart2D (with legend, simple design)
- BarChart2D (single DataSet)
- BarChart2D (multiple DataSets)
- BarChart3D
- PieChart (with selection, …)
- ScatterChart (with squares, triangles, circles, … and more)
