高级Redis应用进阶课 一站式Redis解决方案

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本课程以一个实战项目为主线，整合Redis各种问题场景，不断改造项目，以问带学。学完本课后，面对Redis相关问题，你将能够快速进行排查与修复，无论实际工作还是跳槽面试你都将游刃有余。

适合人群
对Redis有兴趣，但不懂如何和项目深度结合的后端工程师
了解Redis日常操作，但不懂得Redis底层原理的后端工程师
遇到Redis故障完全没有思路，不知如何解决的后端工程师
技术储备要求
后端web开发基础

        canvas.drawLine(x1, y1, x2, y2, scoreRingPaint);
        axisLablePaint.setTextSize(axisLableTextSize);
        axisLablePaint.setTextAlign(Paint.Align.CENTER);
        axisLablePaint.setColor(mInnerScoreRingColor);
        float axisLable_fonth = getFontHeight(axisLablePaint);
        float labelRadius =innerScoreDiameter/2 - inner_ringWidth - axisLable_fonth/2 + 3;
        float x3 =  (float) (centerX + labelRadius * sinValue);
                float y3  =(float) (centerY + labelRadius * cosValue);
        canvas.save();
        canvas.rotate(90+ degree,x3,y3);    //绘製倾斜文字
        canvas.drawText(axisLabelStrs[i],x3,y3 + getFontCenterYToBaseLine(axisLablePaint),axisLablePaint);
        canvas.restore();
    }
    scoreTextPaint.setTextAlign(Paint.Align.CENTER);
    scoreTextPaint.setTextSize(scoreTextSize);
    scoreTextPaint.setColor(mScoreColor);
    double rAngle = Math.toRadians(90 - (-180 + offset_degree));    //弧度
    float offset_y = (float)(maxOutterScoreRadius*Math.cos(rAngle));
    float scoreBaselineY = centerY + offset_y;
    float tempH = getFontTopYToBaseline(scoreTextPaint);
    canvas.drawText(nFormat.format(score), centerX, scoreBaselineY, scoreTextPaint);
    scoreTextPaint.setTextSize(scoreTitleTextSize);
    scoreTextPaint.setColor(mScoreTitleColor);
    float scoreTitleBaselineY = scoreBaselineY - tempH - Tool.dpToPx(2);
    canvas.drawText(mScoreTitleStr, centerX, scoreTitleBaselineY, scoreTextPaint);
}
public static float getFontHeight(Paint textPaint){
    Paint.FontMetrics fm = textPaint.getFontMetrics();
    return (float)Math.ceil(fm.descent - fm.ascent) + 3;
}
public static float getFontTopYToBaseline(Paint textPaint){
    Paint.FontMetrics fm = textPaint.getFontMetrics();
    return (float)Math.ceil(-fm.ascent) + 3;
}
public static float getFontBottomYToBaseline(Paint textPaint){
    Paint.FontMetrics fm = textPaint.getFontMetrics();
    return (float)Math.ceil(fm.descent) + 3;
}
public static float getFontCenterYToBaseLine(Paint textPaint){
    Paint.FontMetrics fm = textPaint.getFontMetrics();
    float fonth = getFontHeight(textPaint);
    return (float)Math.abs(Math.ceil(fonth/2- fm.descent));
}

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