Question

我尝试使用字符串缓冲区，但它无法完成，我实际上是从日期选择器对话框打印日期。分钟值仅显示0，如下午1：00而非下午1:00。

customTimePickerDialogsEnd = new CustomTimePickerDialog(getActivity(), 
     new TimePickerDialog.OnTimeSetListener() {
        @Override
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
          StringBuffer s = new StringBuffer(minute);
          if (minute == 0) {
             s.append(0);
             tvEndTime.setText(" " + hourOfDay + ":" + s);
             System.out.println("minute = " + minute);
          } else {
             System.out.println("minute = " + minute);
             tvEndTime.setText(" " + hourOfDay + ":" + minute);
          }
        }
     }, mHour, mMinute, true);

谢谢。

Answer 1

您可以使用System.out.printf

e.g。

System.out.printf("minute = %02d \n" + minute);

或System.out.format（相当于）

请参阅https://docs.oracle.com/javase/tutorial/java/data/numberformat.html

或者如果您只想将输出保存为String，那么还有

String str = String.format ("minute = %02d \n" + minute);

Answer 2

可怕的，我这样做了，这很简单。 customTimePickerDialogStart = new CustomTimePickerDialog（getActivity（），new TimePickerDialog.OnTimeSetListener（）{

        @Override
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            if (minute == 0) {
                String mins = "00";
                tvStartTime.setText(" " + hourOfDay + ":" + mins);
            } else {
                tvStartTime.setText(" " + hourOfDay + ":" + minute);
            }
        }
    }, mHour, mMinute, true);

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2 个答案: