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t.setAntiAlias(true);
RectF oval = new RectF(centerOfCircle - radius, centerOfCircle - radius, centerOfCircle + radius, centerOfCircle + radius);
switch (mStyle) {
case STROKE:
//空心
mPaint.setStyle(Paint.Style.STROKE);
//画圆弧
/**
*
*开始的角度
*/
canvas.drawArc(oval, 180, 360 * mProgress / mMax, false, mPaint);
break;
case FILL:
//实心
mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
//画圆弧
if(mProgress!=0) {
canvas.drawArc(oval, 180, 360 * mProgress / mMax, true, mPaint);
}
break;
}
源码：
https://github.com/ln0491/ProgressDemo
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