绘制文字时如何让文字居中显示

paintUnselectWeekText.setTextAlign(Paint.Align.CENTER);

canvas.drawText("the text", widthToPlace /2, getPaddingTop() + textHeight, paint)

FontMetricsInt fontMetrics = paint.getFontMetricsInt();
int baseline = targetRect.top + (targetRect.bottom - targetRect.top - fontMetrics.bottom + fontMetrics.top) / 2 - fontMetrics.top;
paint.setTextAlign(Paint.Align.CENTER);
canvas.drawText(testString, targetRect.centerX(), baseline, paint);