Question

我想显示两位小数，并以更合适的方式显示没有括号的值

ScanRecord scanRecord = result.getScanRecord();

assert scanRecord != null;
byte[] puckData = scanRecord.getManufacturerSpecificData(0x0590);
assert puckData != null;

double lightValue = Double.parseDouble(
               Arrays.toString(new byte[]{puckData[0]}).replace("[", "").replace("]", ""));
double tempValue = Double.parseDouble(
               Arrays.toString(new byte[]{puckData[1]}).replace("[", "").replace("]", ""));
double batteryValue = Double.parseDouble(
               Arrays.toString(new byte[]{puckData[2]}).replace("[", "").replace("]", ""));

Answer 1

    double lightValue = .0;
    DecimalFormat df = new DecimalFormat("0.00");      
    System.out.println(df.format(lightValue));

它将打印0.00

Answer 2

试试这个

DecimalFormat df = new DecimalFormat(".##");
Log.d("","kilobytes (DecimalFormat) : " + df.format(123.678));

它将返回： 123.68

如何显示带有两位小数而不是一位零小数的双精度值

2 个答案: