CircularCounter 双层原形进度条,根据数据的变化而增减的，支持逆向旋转。
本项目主要由CircularCounter自定义控件实现， CircularCounter extends View，
主要由如下代码画出：
@Override
?? ?protected void onDraw(Canvas canvas) {
?? ??? ?super.onDraw(canvas);

?? ??? ?canvas.drawCircle(mBackgroundCenter, mBackgroundCenter,
?? ??? ??? ??? ?mBackgroundRadius, mBackgroundPaint);

?? ??? ?canvas.drawArc(mOneBounds, START_DEGREES, mOneDegrees, false, mOnePaint);
?? ??? ?canvas.drawArc(mTwoBounds, START_DEGREES, mTwoDegrees, false, mTwoPaint);
?? ??? ?canvas.drawArc(mThreeBounds, START_DEGREES, mThreeDegrees, false,
?? ??? ??? ??? ?mThreePaint);

?? ??? ?canvas.drawText(Integer.toString(mOneValue), mOneBounds.centerX(),
?? ??? ??? ??? ?mTextPosY, mTextPaint);
?? ??? ?canvas.drawText(mMetricText, mOneBounds.centerX(), mMetricPosY,
?? ??? ??? ??? ?mMetricPaint);
?? ?}
?? ?

进度值变化设置：
/*
?? ? * Setters
?? ? *
?? ? */

?? ?/**
?? ? * Set the next values to be drawn
?? ? * @param v1
?? ? * @param v2
?? ? * @param v3
?? ? */
?? ?public void setValues(int v1, int v2, int v3) {

?? ??? ?if (v1 <= mRange)
?? ??? ??? ?mOneDegrees = Math.round(((float) v1 * 360) / mRange);
?? ??? ?else
?? ??? ??? ?mOneDegrees = 360;

?? ??? ?if (v2 <= mRange)
?? ??? ??? ?mTwoDegrees = Math.round(((float) v2 * 360) / mRange);
?? ??? ?else
?? ??? ??? ?mTwoDegrees = 360;

?? ??? ?if (v3 <= mRange)
?? ??? ??? ?mThreeDegrees = Math.round(((float) v3 * 360) / mRange);
?? ??? ?else
?? ??? ??? ?mThreeDegrees = 360;

?? ??? ?mOneValue = v1;

?? ??? ?mSpinHandler.sendEmptyMessage(0);
?? ?}
???