Android 如何在日期选择器对话框中显示所选日期的第二天日期？

Question

我目前在页面加载时以单独的布局显示今天的日期和日期以及明天的日期和日期。但我的要求是

1) 无论我从 Datepicker, 中选择什么日期，它都应该显示在第一个布局中

2) 第二天的日期应该显示在第二个布局上。

我的第一个要求工作正常，没有任何问题。，（即）无论我选择哪一天，它都会显示在第一个布局上。没问题，但我的第二个要求有问题。

考虑一下，如果我在 DatePicker, 上选择 25-May-2018，它会按预期显示在第一个布局中，但不会将第二天的日期显示为 26-May-2018，而是显示为 26-Jun -2018。但我需要它以这样的方式工作，如果我在 Datepicker, 中选择 25-May-2018，则所选日期应显示在第一个布局上，而第二天的日期（26-May-2018）应显示在下一个布局。这应该适用于我在 Datepicker.

中选择的任何日期

我哪里出错了？

这是我的 Activity.Java:

public class PrivacyPolicyActivity extends AppCompatActivity {

    LinearLayout layout1, layout2, layout3, todayLayout, tomorrowLayout;
    ImageView calendarImgView;
    TextView todayDate;
    TextView todayDay;
    TextView tommmorrowDate;
    TextView tommorrowDay;
    TextView todayLabel;
    TextView tommorrowlabel;
    DatePickerDialog datePickerDialog;
    Calendar calendar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_privacy_policy);

        calendar = Calendar.getInstance();
        Date today = calendar.getTime();
        calendar.add(Calendar.DAY_OF_YEAR, 1);
        Date tomorrow = calendar.getTime();

        final DateFormat dateFormat = new SimpleDateFormat("dd-MMM");

        DateFormat day = new SimpleDateFormat("EEEE");

        layout1 = (LinearLayout) findViewById(R.id.layout1);
        layout2 = (LinearLayout) findViewById(R.id.layout2);
        layout3 = (LinearLayout) findViewById(R.id.layout3);
        todayDate = (TextView) findViewById(R.id.todayDate);

        todayDate.setText(dateFormat.format(today));
        todayDay = (TextView) findViewById(R.id.todayDay);
        todayDay.setText(day.format(today));

        tommmorrowDate = (TextView) findViewById(R.id.tommmorrowDate);
        tommmorrowDate.setText(dateFormat.format(tomorrow));
        tommorrowDay = (TextView) findViewById(R.id.tommorrowDay);
        tommorrowDay.setText(day.format(tomorrow));

        todayLayout = (LinearLayout) findViewById(R.id.todayLayout);
        tomorrowLayout = (LinearLayout) findViewById(R.id.tomorrowLayout);

        todayLabel = (TextView) findViewById(R.id.todayLabel);
        tommorrowlabel = (TextView) findViewById(R.id.tommorrowlabel);
        calendarImgView = (ImageView) findViewById(R.id.calendarImgView);

        calendarImgView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Calendar calendar = Calendar.getInstance();
                int year = calendar.get(Calendar.YEAR);
                int month = calendar.get(Calendar.MONTH);
                int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);

                datePickerDialog = new DatePickerDialog(PrivacyPolicyActivity.this,
                        new DatePickerDialog.OnDateSetListener() {
                            @Override
                            public void onDateSet(DatePicker datePicker, int year, int month, int day) {

//                                SimpleDateFormat dateandmonth = new SimpleDateFormat("dd-MMM");
//                                Date date = new Date();
//                                String reqddate = dateandmonth.format(date);
                                //todayDate.setText(day + "/" + (month + 1) + "/" + year);

                                int cyear = datePicker.getYear();
                                int cmonth = datePicker.getMonth();
                                int cday = datePicker.getDayOfMonth();

                                Calendar cld = Calendar.getInstance();
                                cld.set(cyear, cmonth, cday);
                                SimpleDateFormat format = new SimpleDateFormat("dd-MMM");
                                String strDate = format.format(cld.getTime());
                                todayDate.setText(strDate);

                                SimpleDateFormat dayfmt = new SimpleDateFormat("EEEE");
                                String dayselected = dayfmt.format(cld.getTime());
                                todayDay.setText(dayselected);

                                int nextYear = datePicker.getYear() + 1;
                                int nextMonth = datePicker.getMonth() + 1;
                                int nextDay = datePicker.getDayOfMonth() + 1;

                                Calendar nextcld = Calendar.getInstance();
                                nextcld.set(nextYear, nextMonth, nextDay);

                                SimpleDateFormat tom_format = new SimpleDateFormat("dd-MMM");
                                String tom_date = tom_format.format(nextcld.getTime());
                                tommmorrowDate.setText(tom_date);

                                SimpleDateFormat day_fmt = new SimpleDateFormat("EEEE");
                                String tom_day = day_fmt.format(cld.getTime());
                                tommorrowDay.setText(tom_day);
                            }
                        }, year, month, dayOfMonth);

                datePickerDialog.show();
            }

        });
    }
}

Answer 1

Why you increasing Month and year also with 1 ?

int nextYear = datePicker.getYear() + 1;
int nextMonth = datePicker.getMonth() + 1;
int nextDay = datePicker.getDayOfMonth() + 1;

只需增加 nextDay。

cld.add(Calendar.DATE, 1);

解决方案

 calendarImgView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Calendar calendar = Calendar.getInstance();
                int year = calendar.get(Calendar.YEAR);
                int month = calendar.get(Calendar.MONTH);
                int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);

                datePickerDialog = new DatePickerDialog(PrivacyPolicyActivity.this,
                        new DatePickerDialog.OnDateSetListener() {
                            @Override
                            public void onDateSet(DatePicker datePicker, int year, int month, int day) {


//                                SimpleDateFormat dateandmonth = new SimpleDateFormat("dd-MMM");


                                int cyear = datePicker.getYear();
                                int cmonth =datePicker .getMonth();
                                int cday = datePicker.getDayOfMonth();

                                Calendar cld  = Calendar.getInstance();
                                cld.set(cyear, cmonth, cday);
                                SimpleDateFormat format = new SimpleDateFormat("dd-MMM");
                                String strDate = format.format(cld.getTime());
                                todayDate.setText(strDate);

                                SimpleDateFormat dayfmt = new SimpleDateFormat("EEEE");
                                String dayselected = dayfmt.format(cld.getTime());
                                todayDay.setText(dayselected);


                                cld.add(Calendar.DATE, 1);

                                SimpleDateFormat day_fmt = new SimpleDateFormat("EEEE");
                                String tom_day = day_fmt.format(cld.getTime());
                                tommorrowDay.setText(tom_day);


                            }
                        },year,month,dayOfMonth);

                datePickerDialog.show();
            }





        });

Answer 2

在你Datepicker回调中放置以下代码以在第二天显示。

Calendar calendar = Calendar.getInstance();

calendar.set(Calendar.DATE, datePicker.getDayOfMonth());
calendar.set(Calendar.MONTH, datePicker.getMonth());
calendar.set(Calendar.YEAR, datePicker.getYear());

calendar.add(Calendar.DATE, 1);

SimpleDateFormat tom_format = new SimpleDateFormat("dd-MMM");
String tom_date = tom_format.format(calendar);
tommmorrowDate.setText(tom_date);

Android 如何在日期选择器对话框中显示所选日期的第二天日期？

How to show the next day's date from the selected date in the datepicker dialog in Android?

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