android - 如何在特定时间在 Android 应用程序中设置通知？

Question

我在 android 应用程序 中使用了以下代码来使用 AlarmManager 设置通知(警报)。

 public void setAlarm() {
          Intent intent = new Intent(MainActivity.this, TimeAlarm.class);
          PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
            intent, PendingIntent.FLAG_UPDATE_CURRENT);

          am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(),
            (40000), pendingIntent);
         }

或者我应该使用下面的代码

   Calendar calendar = Calendar.getInstance();

      calendar.set(Calendar.MONTH, 3);
      calendar.set(Calendar.YEAR, 2015);
      calendar.set(Calendar.DAY_OF_MONTH, 21);

      calendar.set(Calendar.HOUR_OF_DAY,11);
      calendar.set(Calendar.MINUTE, 15);
      calendar.set(Calendar.SECOND, 0);
      calendar.set(Calendar.AM_PM,Calendar.AM);

      Intent myIntent = new Intent(MainActivity.this, MyReceiver.class);
      pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, myIntent,0);

      AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
      alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);

I want to set (notification)alarm at this specific time : 11:15AM on 21-March-2015

Can any one help me to set this?

Answer 1

首先，您需要使用 Calendar 来设置您的日期，例如:

Calendar cal = Calendar.getInstance();
cal.set(Calendar.MONTH, 3);
cal.set(Calendar.YEAR, 2015);
cal.set(Calendar.DAY_OF_MONTH, 15);

cal.set(Calendar.HOUR_OF_DAY, 11);
cal.set(Calendar.MINUTE, 15);

然后在您的 setAlarm() 方法中，您只需设置一次闹钟。你不需要重复它:

public void setAlarm() {
     Intent intent = new Intent(MainActivity.this, TimeAlarm.class);
     PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
        intent, PendingIntent.FLAG_UPDATE_CURRENT);

     am.set(AlarmManager.RTC_WAKEUP,cal.getTimeInMillis(),pendingIntent);
}