Android绘制弧形进度条_android arcseekbar 虚弧线进度条

在开发中，需要用到弧形进度条，上网上查了下，有个开源的绘制弧形进度条的，只是它的渐变颜色是分成四段，不是很美观，于是自己参考着做了一个，效果如下图：

这个进度条控件我是参考Radial-Menu-Widget-Android-master开源代码的RadialProgressActivity.java文件改的，修改的主要是它的onDraw函数，修改如下：

protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        this.mRadialWidgetPaint.setStyle(Paint.Style.FILL);
        this.mRadialWidgetPaint.setColor(this.mBorderColor);
        /*用底色画一个圆环，带间隔效果*/
        for(int i = 0; i < this.mMaxSweepAngle; i+=10){
            canvas.drawArc(this.mRadialScoreRect, 90.0F+i, 9.9F, true, this.mRadialWidgetPaint);
        }
 
        if(this.mCurrentValue <= this.mMaxValue) {
            double textWidth = (double)(this.mCurrentValue * this.mMaxSweepAngle / this.mMaxValue);
            this.readingValuePer = this.mCurrentValue * 100 / this.mMaxValue;
 
            int i = 0;
            float rate = 0;
            float startAngle = 90.0F;
            /*根据进度条的长度分成长度为10的若干段，每段通过设置alpha值调节颜色*/
            for(i = 0; i<=textWidth-10; i+=10){
                rate = (float)(Math.abs(180-i)/180.0);
                this.mCurrentScoreColor = ((int)(0XFF*rate) <<24)|(this.mScoreColorRange[0] & (~(0XFF <<