为什么警报管理器不断触发待定意图android？

Question

在我的应用程序中，我正在使用警报管理器。我正在为特定时间设置警报。我正在为特定的未来时间设置多个警报，如下面的代码中所述：

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Log.e("test", "on create is called");

    SharedPreferences preferences = getSharedPreferences("testing", MODE_PRIVATE);
    if (!preferences.getBoolean("alarm", false)) {
        Log.d("test", "generating alrams");
        setAlarm(getFirstAlarmTime(), 1, "one");
        setAlarm(getSecondAlarmTime(), 2, "two");
        setAlarm(getThirdAlarmTime(), 3 ," three");
        setAlarm(getFourthAlarmTime(), 4, "four");
        setAlarm(getFifthAlarmTime(), 5, "five");

        preferences.edit().putBoolean("alarm", true).apply();
    }
}

private long getFirstAlarmTime() {
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, 13);
    calendar.set(Calendar.MINUTE, 7);
    calendar.set(Calendar.SECOND,0);

    return calendar.getTimeInMillis();
}

private long getSecondAlarmTime() {
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, 13);
    calendar.set(Calendar.MINUTE, 8);
    calendar.set(Calendar.SECOND,0);

    return calendar.getTimeInMillis();
}

private long getThirdAlarmTime() {
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, 13);
    calendar.set(Calendar.MINUTE, 9);
    calendar.set(Calendar.SECOND,0);

    return calendar.getTimeInMillis();
}

private long getFourthAlarmTime() {
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, 13);
    calendar.set(Calendar.MINUTE, 10);
    calendar.set(Calendar.SECOND,0);

    return calendar.getTimeInMillis();
}

private long getFifthAlarmTime() {
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, 13);
    calendar.set(Calendar.MINUTE, 11);
    calendar.set(Calendar.SECOND,0);

    return calendar.getTimeInMillis();
}


private void setAlarm(long alarmTime, int id, String type){
    Intent intent = new Intent(this, NotifyService.class);
    intent.putExtra("id", id);
    intent.putExtra("type", type);
    PendingIntent alarmIntent = PendingIntent.getService(getApplicationContext(), id, intent, 0);
    AlarmManager manager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    manager.set(AlarmManager.RTC_WAKEUP, alarmTime,  alarmIntent);
}

}

下面是我在意图中调用的服务 NotifyService

  @Override
public int onStartCommand(Intent intent, int flags, int startId) {

    int id = 0;
    String type = null;
    if (intent != null) {
        id = intent.getExtras().getInt("id");
        type = intent.getExtras().getString("type");
        Log.e("test", "current id is " + id);
        Log.e("test", "type is " + type);
    }
    PendingIntent activity = PendingIntent.getActivity(getApplicationContext(), id, intent, PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(NOTIFICATION_SERVICE);
    Uri azanSound = Uri.parse("android.resource://" + getApplicationContext().getPackageName() + "/raw/makkah_azan");
    NotificationCompat.Builder builder = new NotificationCompat.Builder(getApplicationContext());
    if(!muteStatus) {
        builder.setContentTitle(type)
                .setContentText(type + " time has started...")
                .setAutoCancel(false)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setSound(azanSound)     // put sound here
                .setContentIntent(activity);
    }
    Notification notification = builder.build();
    notification.flags = Notification.FLAG_AUTO_CANCEL;
    notificationManager.notify(id, notification);

    return START_REDELIVER_INTENT ;
}

每个警报都会在 setAlarm() 方法中提到的特定时间触发，但问题是当我杀死我的应用程序并重新启动我的应用程序时，警报管理器会再次开始触发挂起的意图。为什么我会错过任何东西？我花了很多时间和谷歌，但找不到任何解决方案。有什么帮助吗？

我注意到的一件事是，如果手机时间是 12 点，闹钟设置为 11 点，应用程序启动，闹钟会不断重复。 :(

Answer 1

您确定在您杀死您的应用程序后警报实际上是在触发，而不仅仅是您通过在 NotifyService 中返回 START_REDELIVER_INTENT 来请求再次传递您的意图。

'START_REDELIVER_INTENT' 基本上是要求如果任务被终止，则应重复该意图。对于您的用例，您似乎需要返回 START_NOT_STICKY 因为您只想触发一次意图。

What is START_STICKY,START_NOT_STICKY and START_REDELIVER_INTENT Service

另外，回答

我注意到一件事，如果手机时间是 12 点 时钟和闹钟设置为 11 点，应用程序启动闹钟保持 重复。

在过去设置的任何警报都会立即触发。