自定义view文字在矩形里居中

        canvas.drawRoundRect(rectF, 10f, 10f, mAwakenPointPaint);
        String res = "安静啊啊家";
        Paint.FontMetrics fontMetrics = mAwakenPointPaint.getFontMetrics();
        float baseline = rectF.centerY() - (fontMetrics.top / 2) - (fontMetrics.top / 2);
        mAwakenTextPaint.setTextAlign(Paint.Align.CENTER);
        canvas.drawText(res, rectF.centerX(), baseline, mAwakenTextPaint);