Android 中的计划程序到特定日期

Question

我正在尝试制作一个计划程序，它会在计划的日期和时间到来时向您发出通知。我正在使用广播接收器 class，我已经让它工作了一天。

这意味着您可以 select 一个月内的任何一天和任何时间它都可以正常工作，但是如果用户下个月或下一年 select 我会遇到很多问题这是我按计划按钮单击的代码。

这里的 mDay、mMonth、mYear、mHour、mMinute 是用户为他的 select 编辑的日期和时间 activity，cday、cmonth、cyear 是当前的日期和时间。

btn_schedule.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            System.out.println("Entered in Alarm on click");

            Calendar cal = Calendar.getInstance();
            Hour = cal.get(Calendar.HOUR_OF_DAY);
            Minute = cal.get(Calendar.MINUTE);

            cday = cal.get(Calendar.DATE);
            cmonth = cal.get(Calendar.MONTH);
            cyear = cal.get(Calendar.YEAR);

            dday = mDay - cday;
            dmonth = mMonth - cmonth;
            dyear = mYear - cyear;

            if (dyear == 0) {
                if (dmonth == 0) {
                    if (dday == 0) {
                        long CurrentMilli = (mHour * 3600 * 1000) + (mMinute * 60 * 1000);
        long SelectedMilli = (Hour * 3600 * 1000) + (Minute * 60 * 1000);

        long diff = CurrentMilli - SelectedMilli;
        diff1 = diff;
        System.out.println("difference and " + diff + "diff1" + diff1);

        new CountDownTimer(diff, 1000) { // adjust the
            // milli
            // seconds
            // here

            public void onTick(long millisUntilFinished) {
            }

            public void onFinish() {
            }
        }.start();
    }

                    } else {// Else if day is not the same
                        int dh = 24 - Hour; // today's remaining hours till
                                            // next date
                        int dm = 60 - Minute;// today's remaining minutes
                                                // till next date
                        long dhm = dh * 3600000;// in milli
                        long dmm = dm * 60000;// in milli
                        long totaltm = dhm + dmm;
                        diff1 = totaltm;
                        long lh = mHour * 3600000;// selected hours in milli
                        long lm = mMinute * 60000;// selected min in milli
                        ltt = lh + lm;

                        new CountDownTimer(totaltm, 1000) { // adjust the
                            // milli
                            // seconds
                            // here

                            public void onTick(long millisUntilFinished) {
                            }

                            public void onFinish() {
                                dday--;
                                forDay1(dday);
                            }
                        }.start();

                    }
                } else {
                    // Else if month is not the same



                }

            } else {// Else if year is not the same

            }
            long a = diff1;
            Long alertTime = new GregorianCalendar().getTimeInMillis() + a;
            Intent alertIntent = new Intent(HomeScreen.this, Alerts.class);
            AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
            am.set(AlarmManager.RTC_WAKEUP, alertTime, PendingIntent
                    .getBroadcast(HomeScreen.this, 2, alertIntent,
                            PendingIntent.FLAG_UPDATE_CURRENT));
            System.out.println("Notification is called");
            Intent moreinfo = new Intent(HomeScreen.this, HomeScreen.class);
            TaskStackBuilder tsb = TaskStackBuilder
                    .create(getApplicationContext());
            tsb.addParentStack(HomeScreen.class);
            tsb.addNextIntent(moreinfo);



        }
    });

这是我的广播class：

public class Alerts extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        System.out.println("Inside Service");
        createNotification(context, "Times Up!", "Start Your Activity!",
                "Click here to enter the application!");

    }

    public void createNotification(Context context, String msg, String msgtext,
            String msgalert) {
        System.out.println("Method inside service is called");
        PendingIntent pi = PendingIntent.getActivity(context, 0, new Intent(
                context, HomeScreen.class), 0);
        NotificationCompat.Builder ncb = new NotificationCompat.Builder(context)
                .setContentTitle(msg).setContentText(msgtext)
                .setTicker(msgalert).setSmallIcon(R.drawable.ic_launcher)
                .setDefaults(Notification.DEFAULT_SOUND)
                .setDefaults(Notification.DEFAULT_VIBRATE);

        ncb.setContentIntent(pi);
        ncb.setAutoCancel(true);

        NotificationManager nm = (NotificationManager) context
                .getSystemService(Context.NOTIFICATION_SERVICE);
        nm.notify(2, ncb.build());

    }

}

并且此代码适用于一个月内的任何一天。

Answer 1

您不需要执行计算差异 ddat 和大 if (dyear == 0) { 的所有自定义逻辑...只需将 user-selected 字段设置为 Calendar:

Calendar cal = Calendar.getInstance();
cal.set(mYear, mMonth, mDay, mHour, mMinute);

然后您可以使用新日历的时间戳作为您的提醒时间。

long alertTime = cal.getTimeInMillis();

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