从 CalendarView 获取自 UNIX 纪元以来的 Millis 时间

Posted 2023-03-24

【中文标题】从 CalendarView 获取自 UNIX 纪元以来的 Millis 时间

【英文标题】：Getting time in Millis since UNIX epoch from a CalendarView

【发布时间】：2016-05-14 05:39:14

【问题描述】：

我想找到当前时间和从日历视图中选择的日期之间的秒数。我目前的方法如下

    mCalculateButton = (Button) findViewById(R.id.calcButton);
    mDatePicker = (CalendarView) findViewById(R.id.calendarView);

    mCalculateButton.setOnClickListener(new View.OnClickListener() 
        @Override
        public void onClick(View v) 

            //Grabbing the date selected from the CalendarView to send to intent
            long age = mDatePicker.getDate();
            startCalculation(age);

        
    );


private void startCalculation(long age)
    Intent intent = new Intent(this, CalcActivity.class);
    intent.putExtra("key_age", age);
    startActivity(intent);

在计算活动中

    Intent intent = getIntent();

    //Date selected in MSUE
    mSelectedTime = intent.getLongExtra("key_age", 0);

    //Current date in MSUE
    mCurrTime = System.currentTimeMillis();

    mSecondsInfo = (TextView) findViewById(R.id.secondsInfo);
    mDaysInfo = (TextView) findViewById(R.id.daysInfo);
    mMonthsInfo = (TextView) findViewById(R.id.monthsInfo);
    mYearsInfo = (TextView) findViewById(R.id.yearsInfo);

    //Replacing format specifiers with desired age information
    mSecondsInfo.setText(mSecondsInfo.getText().toString().replace("%i%", Long.toString(ageInSeconds(mSelectedTime, mCurrTime))));
    mDaysInfo.setText(mDaysInfo.getText().toString().replace("%i%", Long.toString(ageInDays(mSelectedTime, mCurrTime))));
    mMonthsInfo.setText(mMonthsInfo.getText().toString().replace("%i%", Long.toString(ageInMonths(mSelectedTime, mCurrTime))));
    mYearsInfo.setText(mYearsInfo.getText().toString().replace("%i%", Long.toString(ageInYears(mSelectedTime, mCurrTime))));


private long ageInSeconds(long mil, long currTime)
    return (currTime - mil) / 1000;

private long ageInDays(long mil, long currTime)
    return (currTime - mil)/ 1000 / 60 / 60 / 24;

private long ageInMonths(long mil, long currTime)
    return (currTime - mil) / 1000 / 60 / 60 / 24/ 30;

private long ageInYears(long mil, long currTime)
    return  (currTime - mil) / 1000 / 60 / 60 / 24/ 30 / 12;

问题是 mDatePicker.getDate 返回的时间每天只增加约 4000 毫秒，我不知道为什么。关于为什么这不起作用的任何想法？

【参考方案1】：

CalendarView 不存储选择的日期，但是你可以监听选择事件并自己存储。

mDatePicker .setOnDateChangeListener(new CalendarView.OnDateChangeListener() 
        @Override
        public void onSelectedDayChange(CalendarView view, int year, int month, int dayOfMonth) 
             storedDate = new GregorianCalendar(year,month,dayOfMonth);
        
    );

mCalculateButton.setOnClickListener(new View.OnClickListener() 
    @Override
    public void onClick(View v) 
        startCalculation(storedDate.getTimeInMillis());
    
);