AlarmManager不工作

Question

例如，我需要在10秒后启动activity AlarmReceiver。我需要在不运行应用程序的情况下激活它。但无论应用程序是否运行，都不会调用AlarmReceiver。有什么建议吗？

Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 111, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

//alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() 
                                          //+ (10 * 1000), pendingIntent);
Toast.makeText(this, "Alarm set", Toast.LENGTH_LONG).show();

Answer 1

public class AlarmReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
          String message = "Hellooo, alrm worked ----";
          Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
          Intent intent2 = new Intent(context, TripNotification.class); 
          intent2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
          context.startActivity(intent2);
    }

    public void setAlarm(Context context){
        Log.d("Carbon","Alrm SET !!");

        // get a Calendar object with current time
         Calendar cal = Calendar.getInstance();
         // add 30 seconds to the calendar object
         cal.add(Calendar.SECOND, 30);
         Intent intent = new Intent(context, AlarmReceiver.class);
         PendingIntent sender = PendingIntent.getBroadcast(context, 192837, intent, PendingIntent.FLAG_UPDATE_CURRENT);

         // Get the AlarmManager service
         AlarmManager am = (AlarmManager) context.getSystemService(context.ALARM_SERVICE);
         am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender);
    }
}

这是我设法运行的最后一段代码。您需要添加

 <receiver  android:process=":remote" android:name="AlarmReceiver"></receiver>

就在清单文件中</application>标记的上方。

这会将警报设置为在调用SetAlarm()方法后30秒内触发

Answer 2

到目前为止，不运行应用程序就不能启动警报，您必须运行各自的应用程序才能激活警报。为了这个....！！

ALARM_ACTIVITY中的 :

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

Intent intent = new Intent(ALARM_ACTIVITY.this,ALARM_RECEIVER.class); 

PendingIntent pendingIntent = PendingIntent.getBroadcast(SetReminder.this, ID, intent, PendingIntent.FLAG_UPDATE_CURRENT);

alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeInMillis() + 1000, pendingIntent);

ALARM_RECEIVER中的：

NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

notification = new Notification(R.drawable.alarmicon, "charSequence", System.currentTimeMillis());

notification.setLatestEventInfo(context, "alarmTitle", "charSequence", pendingIntent);

notification.flags |= Notification.FLAG_AUTO_CANCEL;

notificationManager.notify(1, notification);

Answer 3

如果它仍然不能工作，摆脱android:process=":remote"部分可能会有所帮助。对我很有效:)