如何使用AlarmManager创建提醒？

Question

我试图做一个项目，将在特定时间显示Notification甚至应用程序未打开它会显示它。但它在特定时间和特定时间之后显示消息。此外，应用程序关闭时Notification不起作用。

如何在给定时间后永久停止并在后台运行？

代码如下。

private PendingIntent pendingIntent; 

@Override 
public void onCreate(Bundle savedInstanceState) 
{ 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    Calendar calendar = Calendar.getInstance(); 

    calendar.set(Calendar.MONTH, Calendar.SEPTEMBER); 
    //calendar.set(Calendar.YEAR, 2016); 
    calendar.set(Calendar.DAY_OF_MONTH, 15); 

    calendar.set(Calendar.HOUR_OF_DAY, 14); 
    calendar.set(Calendar.MINUTE, 24); 
    calendar.set(Calendar.SECOND, 05); 
    //calendar.set(Calendar.AM_PM,Calendar.PM); 

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

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

    Intent into = new Intent(this, AlarmReceiver.class); 
    PendingIntent ppendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 1253, into, 0); 
    AlarmManager alarmManag = (AlarmManager) getSystemService(ALARM_SERVICE); 
    alarmManag.cancel(ppendingIntent); 
    ppendingIntent.(); 
} 

@Override 
public void onReceive(Context context, Intent intent) 
{ 
    Intent service1 = new Intent(context, MyAlarmService.class); 
    context.startService(service1); 

} 

Receiver已被添加到清单。

Answer 1

Calendar calendar = Calendar.getInstance(); 

    calendar.set(Calendar.MONTH, Calendar.SEPTEMBER); 
    calendar.set(Calendar.DAY_OF_MONTH, 15); 
    calendar.set(Calendar.HOUR_OF_DAY, 14); 
    calendar.set(Calendar.MINUTE, 24); 
    calendar.set(Calendar.SECOND, 00); 


AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); 

final int id = (int) System.currentTimeMillis(); 
Intent intentAlarm = new Intent(this, AlarmReceiver.class); 
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, id, intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT); 


alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);