[移动开发]Android 开发自定义角度进度

/**
 * 绘制当前的圆弧
 * @param canvas
 */
private void drawArc(Canvas canvas) {
    //绘制圆弧背景
    float x = (getWidth() - getHeight() / 2) / 2;
    float y = getHeight() / 4;
    RectF mRectF = new RectF( x, y,
            getWidth() - x, getHeight() - y);
    canvas.drawArc(mRectF,startAngle,mAngle,false,mArcPaint);
    //绘制当前数值对应的圆弧
    mArcPaint.setColor(Color.parseColor("#FF4A40"));
    //根据当前数据绘制对应的圆弧
    RectF mRectF1 = new RectF(x+80, y+80,getWidth() - x-80, getHeight() - y-80);
    canvas.drawArc(mRectF1,startAngle,mAngle,false,mArcPaintthree);
    canvas.drawArc(mRectF1,startAngle,mIncludedAngle,false,mArcPaintTow);
    canvas.drawLine(x,getHeight()/2,x+40,getHeight()/2,mpointerPaint);//画线刻度
    canvas.drawLine(getWidth()-40-x,getHeight()/2,
            getWidth()-x,getHeight()/2,mpointerPaint);//画线刻度
    canvas.drawLine(getWidth()/2,getHeight()/4,getWidth()/2,getHeight()/4+40,mpointerPaint);//画线刻度
    canvas.drawLine(getWidth()/2,getHeight() - y,getWidth()/2,getHeight() - y-40,mpointerPaint);//画线刻度
    canvas.drawLine(0,getHeight()/2,getWidth(),getHeight()/2,levelPaint);//水平线
    canvas.save();//先保存之前的
    canvas.rotate(mIncludedAngle,getWidth()/2, getHeight()/2);//延中心点旋转角度
    canvas.drawLine(x,getHeight()/2,getWidth()-40-x,getHeight()/2,mpointerPaint);//画线
    canvas.restore();//恢复
}