我目前正在尝试制作日历应用,但是我的代码出了点问题,因此我无法做到这一点。目前,香港专业教育学院制作了一个calendarView并设置了onSelectedDateChangeListner,并为年,月和日分配了字符串。我故意将此值传递给另一个类,但即使我单击另一个日期,它也可以保留此日期(2015.04.20)。对不起,我的英语不是我的母语。以下是相关代码:

MainActivity.java:

    mCalendarView.setOnDateChangeListener(new                   CalendarView.OnDateChangeListener() {
        @Override
        public void onSelectedDayChange(CalendarView view, int year, int   month, int dayOfMonth) {
            Calendar c = Calendar.getInstance();
            String calYear = String.valueOf(c.get(Calendar.YEAR));
            String calMonth = String.valueOf(c.get(Calendar.MONTH)+1);
            String calDay = String.valueOf(c.get(Calendar.DAY_OF_MONTH));

            Intent newEvent = new Intent(MainActivity.this, CalendarEvent.class);

            newEvent.putExtra("YEAR", calYear);
            newEvent.putExtra("MONTH", calMonth);
            newEvent.putExtra("DAY", calDay);

            startActivity(newEvent);
        }
    });


CalendarEvent.java

Bundle extras = getIntent().getExtras();
    if(extras != null){
        mYear = extras.getString("YEAR");
        mMonth = extras.getString("MONTH");
        mDay = extras.getString("DAY");
    }

    TextView hello = (TextView)findViewById(R.id.helloworld);
    hello.setText(mYear + "/" + mMonth + "/" + mDay);

最佳答案

您正在传递日历c的值,而不是更改日期的值。您可以通过调用“ c.set()”来设置正在使用的日历实例。

mCalendarView.setOnDateChangeListener(new                   CalendarView.OnDateChangeListener() {
    @Override
    public void onSelectedDayChange(CalendarView view, int year, int   month, int dayOfMonth) {
        Calendar c = Calendar.getInstance();
        c.set(year, month, dayOfMonth);
        String calYear = String.valueOf(c.get(Calendar.YEAR));
        String calMonth = String.valueOf(c.get(Calendar.MONTH)+1);
        String calDay = String.valueOf(c.get(Calendar.DAY_OF_MONTH));

        Intent newEvent = new Intent(MainActivity.this, CalendarEvent.class);

        newEvent.putExtra("YEAR", calYear);
        newEvent.putExtra("MONTH", calMonth);
        newEvent.putExtra("DAY", calDay);

        startActivity(newEvent);
    }
});


不过,我认为您要做的就是:

mCalendarView.setOnDateChangeListener(new                   CalendarView.OnDateChangeListener() {
    @Override
    public void onSelectedDayChange(CalendarView view, int year, int   month, int dayOfMonth) {
        Intent newEvent = new Intent(MainActivity.this, CalendarEvent.class);
        newEvent.putExtra("YEAR", String.valueOf(year));
        newEvent.putExtra("MONTH", String.valueOf(month));
        newEvent.putExtra("DAY", String.valueOf(dayOfMonth));
        startActivity(newEvent);
    }
});

10-07 19:03
查看更多