TimePicker - 如何获得AM或PM？

Question

我想根据用户在TimePicker中的选择设置警报.TimePicker设置为AM/PM模式.为了知道用户是否希望将其闹钟设置为上午10点或下午10点,我应该如何获得AM/PM值？

听众TimePickerDialog.OnTimeSetListener只通过了几小时和几分钟.

Answer 1

以上答案是对的,我找到了找到AM PM的最简单方法.

TimePickerDialog.OnTimeSetListener onStartTimeListener = new OnTimeSetListener() {

    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        String AM_PM ;
        if(hourOfDay < 12) {
            AM_PM = "AM";
        } else {
            AM_PM = "PM";
        }

        mStartTime.setText(hourOfDay + " : " + minute + " " + AM_PM );
    }
};

Answer 2

在回调中

public void onTimeSet(TimePicker view, int hourOfDay, int minute) 

调用以下功能

private String getTime(int hr,int min) {
        Time tme = new Time(hr,min,0);//seconds by default set to zero
        Format formatter;
        formatter = new SimpleDateFormat("h:mm a");
        return formatter.format(tme);
    }

这些函数会在下午1:12返回

Answer 3

您可以使用以下方法从Timepicker获取AM/PM.Timepicker是一个viewgroup.这就是为什么我们可以得到它的子视图索引2,它表明AM/PM实际上是一个按钮.所以我们可以得到它的文本.

 Mycallback=new OnTimeSetListener() {

        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        ViewGroup vg=(ViewGroup) view.getChildAt(0);
            Toast.makeText(TimePickerDemoActivity.this, hourOfDay+":"+minute+":"+((Button)vg.getChildAt(2)).getText().toString(), 5000).show();

        }
    };

Answer 4

我宁愿把这个留作评论,但我没有足够的声誉.到目前为止,最简洁的获取AM或PM的方法是使用三元运算符:

String am_pm = (hourOfDay < 12) ? "AM" : "PM";

Answer 5

我使用日历做到了这一点，这应该适用于所有版本：

public void onTimeSet(TimePicker view, int hourOfDay, int minute){
    String am_pm = "";

    Calendar datetime = Calendar.getInstance();
    datetime.set(Calendar.HOUR_OF_DAY, hourOfDay);
    datetime.set(Calendar.MINUTE, minute);

    if (datetime.get(Calendar.AM_PM) == Calendar.AM)
        am_pm = "AM";
    else if (datetime.get(Calendar.AM_PM) == Calendar.PM)
        am_pm = "PM";

    String strHrsToShow = (datetime.get(Calendar.HOUR) == 0) ?"12":Integer.toString( datetime.get(Calendar.HOUR) );


    ((Button)getActivity().findViewById(R.id.btnEventStartTime)).setText( strHrsToShow+":"+datetime.get(Calendar.MINUTE)+" "+am_pm );
}

请注意 的使用Calendar.HOUR_OF_DAY，Calendar.HOUR如果您查看两者的文档，您就会知道其中的技巧。

Answer 6

在这里，我从系统中获取当前日期和时间，并使用日期和时间选择器对话框进行更新

private int  mMonth,mYear,mDay,mHour,mMin;

public static final int DTPKR = 1;

public static final int TMPKR = 2;

// Getting  the current date and time into DatePicker dialog

    public void getCurrentDate(){
       final Calendar c = Calendar.getInstance();
        mYear = c.get(Calendar.YEAR);
        mMonth = c.get(Calendar.MONTH);
        mDay = c.get(Calendar.DAY_OF_MONTH);
    } 

    public void getCurrentTime(){
                final Calendar c = Calendar.getInstance();
            mHour = c.get(Calendar.HOUR_OF_DAY);
            mMin = c.get(Calendar.MINUTE);

      } 

现在创建对话框并更新值 //Creating dialogs

    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case DTPKR:
            return new DatePickerDialog(this,lisDate, mYear, mMonth, mDay);
        case TMPKR:
            return new TimePickerDialog(this,lisTime,mHour, mMin, false);
        }
        return null;
    }

    //setting date and updating editText 

       DatePickerDialog.OnDateSetListener lisDate = new DatePickerDialog.OnDateSetListener() {
               @Override
               public void onDateSet(DatePicker view, int year, int monthOfYear,
                 int dayOfMonth) {
                   mYear = year;
                    mMonth = monthOfYear;
                    mDay = dayOfMonth;
                etDate.setText(new StringBuilder() .append(mDay).append("/").append(mMonth+1).append("/").append(mYear));
                getCurrentDate();     

             }
    };

  //setting time and updating editText 

    TimePickerDialog.OnTimeSetListener lisTime=new TimePickerDialog.OnTimeSetListener() {

        @Override
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            mHour=hourOfDay;
            mMin=minute;

             String AM_PM ;
                if(hourOfDay < 12) {
                    AM_PM = "AM";

                } else {
                    AM_PM = "PM";
                    mHour=mHour-12;
                }
                etTime.setText(mHour+":"+mMin+" "+AM_PM);
                getCurrentDate();
        }
    };

Answer 7

我认为回调将以 24 格式的小时调用，因为。DialogTimePicker在内部使用。并且TimePicker有getCurrentHour方法，它返回 0-23 格式的小时。