如何在Android中绘制这样的动态饼图？

在不使用任何第三方库的情况下，绘制这样的饼图最简单的方法是什么

画布。drawArc（）

是一条路要走

使用3个距离进行采样：

float distanceA = 20.0f;
float distanceB = 30.0f;
float distanceC = 40.0f;

float distanceTotal = distanceA + distanceB + distanceC;

/* Calculate the percentage that each distance represents out of the whole. That percentage represents the fraction of the the arc. */

float percentageA = distanceA/distanceTotal;
float percentageB = distanceB/distanceTotal;
float percentageC = distanceC/distanceTotal;

// Now draw the arc. For our bounds, just use a 40 X 40 
// rectangle, but change it for your dimensions.
RectF bounds = new RectF(0.0,0.0,40.0,40.0);

float startAngle = 0.0;
float angleA = percentageA * 360.0f;
float angleB = percentageB * 360.0f;
float angleC = percentageC * 360.0f;

// Draw the arc representing distanceA:
paint.setColor(colorA)
canvas.drawArc(bounds, startAngle,
                        angleA, true, paint);

/* Next arc will be drawn starting at the point where the arc representing distance A ends */
startAngle+=angleA;
paint.setColor(colorB);
canvas.drawArc(bounds, startAngle,
                        angleB, true, paint);

startAngle+=angleB;

// And so on for angle C. Adjust the stroke width on // the paint object to increase your arc thickness.

昨天实现了一个类似圆形饼图的功能，可以在用户滚动时绘制线段。可以在这里参考我的github。java类提供了绘制不同形状的示例。

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我建议您使用MpAndroidChart。

创建您自己的视图或复合视图。这不是一件容易的工作，但就是这样做的。如果要避免使用任何第三方库，请尝试Canvas.drawArc