如何通过取消旧警报和添加新警报来更新警报？

Question

如何更新报警时间和日期

Intent i = new Intent("com.appsinbox.mydiary.remainder.demoactivity"); 
PendingIntent operation = PendingIntent.getActivity(getBaseContext(), 0, i, Intent.FLAG_ACTIVITY_NEW_TASK); 
AlarmManager alarmManager = (AlarmManager) getBaseContext().getSystemService(ALARM_SERVICE); 
GregorianCalendar calendar = new GregorianCalendar(year,month,day, 7, 00); 
long alarm_time = calendar.getTimeInMillis(); 
alarmManager.set(AlarmManager.RTC_WAKEUP , alarm_time , operation); 
Toast.makeText(getBaseContext(), "Alarm is set successfully",Toast.LENGTH_SHORT).show(); 

Answer 1

只是调用取消方法： -

取消

mAlarmPendingIntent = PendingIntent.getActivity(this, requestCode, intent, flags); 
this.getAlarmManager().cancel(mAlarmPendingIntent); 

或

添加新

AlarmManager am = (AlarmManager)getSystemService(alarm); 

Intent i= new Intent("MY_INTENT"); 
PendingIntent pi = PendingIntent.getBroadcast(this, 0, i, 0); 

Calendar calendar = Calendar.getInstance(); 
calendar.setTimeInMillis(System.currentTimeMillis()); 
calendar.add(Calendar.MINUTE, 2); 
am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pi);