Question

我在编辑文本中有两个单独的时间选择器，用于开始时间和结束时间。当我选择开始时间为9:00时：在选择结束时间之后，它不会比开始时间短。结束时间应大于开始时间。建议一些解决方案。

int hour=0;
int minute=0;
TimePickerDialog mTimePicker;

start.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {


            mTimePicker = new TimePickerDialog(Jobcompletion.this, new TimePickerDialog.OnTimeSetListener() {
                @SuppressLint("SetTextI18n")
                @Override
                public void onTimeSet(TimePicker timePicker, int hourOfDay, int selectedMinute) {


                    String AM_PM = " AM";
                    String mm_precede = "";
                    String hh_precede = "";

                        if (hourOfDay >= 12) {
                            AM_PM = " PM";
                            if (hourOfDay >= 13 && hourOfDay < 24) {
                                hourOfDay -= 12;
                            } else {
                                hourOfDay = 12;
                            }
                        } else if (hourOfDay == 0) {
                            hourOfDay = 12;
                        }
                        if (hourOfDay < 10) {
                            hh_precede = "0";
                        }
                        if (selectedMinute < 10) {
                            mm_precede = "0";
                        }


                        start.setText(hh_precede+hourOfDay + ":" +mm_precede + selectedMinute+ " " + AM_PM);
                    }



            }, hour, minute, false);    //12hour=false/true
            mTimePicker.setTitle("Select StartTime");
            mTimePicker.show();

        }
    });
    end.setOnClickListener(new View.OnClickListener() {
      /*  Calendar mcurrentTime = Calendar.getInstance();
        int hour = mcurrentTime.get(Calendar.HOUR_OF_DAY);
        int minute = mcurrentTime.get(Calendar.MINUTE);*/
        @Override
        public void onClick(View v) {


            mTimePicker = new TimePickerDialog(Jobcompletion.this, new TimePickerDialog.OnTimeSetListener() {
                @SuppressLint("SetTextI18n")
                @Override
                public void onTimeSet(TimePicker timePicker, int hourOfDay, int selectedMinute ) {


                    String AM_PM = " AM";
                    String mm_precede = "";
                    String hh_precede = "";


                        if (hourOfDay >= 12) {
                            AM_PM = " PM";
                            if (hourOfDay >= 13 && hourOfDay < 24) {
                                hourOfDay -= 12;
                            } else {
                                hourOfDay = 12;
                            }
                        } else if (hourOfDay == 0) {
                            hourOfDay = 12;
                        }

                        if (hourOfDay < 10) {
                            hh_precede = "0";
                        }
                        if (selectedMinute < 10) {
                            mm_precede = "0";
                        }

                        end.setText(hh_precede + hourOfDay + ":" + mm_precede + selectedMinute + " " + AM_PM);

                }
            }, hour, minute, false);
               Log.e("Min",String.valueOf(minute));
            mTimePicker.setTitle("Select EndTime");
            mTimePicker.show();


        }
    });

Answer 1

首先，如果您在应用中进行任何日期/时间操作，我强烈建议您导入Java 310 Backport for Android (ThreeTenABP)：

compile 'com.jakewharton.threetenabp:threetenabp:1.0.3'

由于Java 7提供的Date和Calendar类很乱。

您需要自己实施验证。一个简单的实现是保持开始和结束时间的值，然后检查一个是否大于另一个。此代码假定使用310反向端口：

private LocalTime mStartTime;
private LocalTime mEndTime;

@Override
public void onTimeSet(TimePicker picker, int hourOfDay, int minuteOfHour) {
    mStartTime = LocalTime.of(hourOfDay, minuteOfHour);

    if(mStartTime.isAfter(mEndTime)) {
        // Handle case
    }
}

最后，您没有理由自己设置日期/时间文本。 Android为此提供了DateUtils类：

long start = ZonedDateTime.of(LocalDate.now(), mStartTime, ZoneId.systemDefault()).toInstant().toEpochMilli();

String startTime = DateUtils.formatDateTime(this, start, DateUtils.FORMAT_SHOW_TIME);

这将考虑用户设置（12小时/ 24小时）和设备的区域设置。

以下是使用Java 7类的相同代码：

private Date mStartTime;
private Date mEndTime;

@Override
public void onTimeSet(TimePicker picker, int hourOfDay, int minuteOfHour) {
    Calendar date = new GregorianCalendar();
    date.set(Calendar.HOUR_OF_DAY, hourOfDay);
    date.set(Calendar.MINUTE, minuteOfHour);
    mStartTime = date.getTime();

    if(mStartTime.after(mEndTime)) {
        // Handle case
    }
}

String startTime = DateUtils.formatDateTime(this, mStartTime.getTime(), DateUtils.FORMAT_SHOW_TIME);

两个时间选择器对话框，包含开始时间和结束时间

1 个答案: