Question

安卓setscale以一点为支点缩放是什么意

Answer 1

BigDecimal原吧说double问题吧 new BigDecimal(currentLat2); 值再 2.4556752.455674999999999999999999 保留5位数四舍五入变2.455672.45568 确没形种数据 种情况用字符串避免种问题 String currentLat2 = "2.455675"; BigDecimal b = new BigDecimal(currentLat2); System.out.println(b.setScale(5, BigDecimal.ROUND_HALF_UP).doubleValue());