int circleXY = (int) (mWidth / 2);        int circleRadius = (int) ((mWidth * 0.5) / 2) + 20;        //计算文本宽度        int textWidth = getTextWidth(mTextPaint,mText);        //计算baseline:垂直方向居中        Paint.FontMetricsInt fontMetrics = mTextPaint.getFontMetricsInt();        int baseline = (getMeasuredHeight() - fontMetrics.bottom + fontMetrics.top) / 2 - fontMetrics.top;        Rect bounds = new Rect();        mTextPaint.getTextBounds(mText, 0, mText.length(), bounds);        int textX = (circleXY-textWidth)/2+circleRadius-20;        canvas.drawText(mText,textX,baseline,mTextPaint);

/**     * 获取文本的宽度     * @param paint     * @param str     * @return     */    public static int getTextWidth(Paint paint, String str) {        int iRet = 0;        if (str != null && str.length() > 0) {            int len = str.length();            float[] widths = new float[len];            paint.getTextWidths(str, widths);            for (int j = 0; j < len; j++) {                iRet += (int) Math.ceil(widths[j]);            }        }        return iRet;    }