预定警报从不调用接收器类 [英] Scheduled alarm never calls receiver class

问题描述

我正在尝试将闹钟设置为每 5 分钟触发一次.

I'm trying to set an alarm to fire every 5 minutes.

这是设置闹钟的代码:

   @Override
public void scheduleAlarmManager() {
    Timber.i("After SignIn sets AlarmManager");
    // broadcast
    Intent intent = new Intent(this, PatientAlarmReceiver.class);
    intent.setAction(PATIENT_START_ALARM_ACTION);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(
            this, REQUEST_CODE, intent, 0);

    // and set alarmManager
    AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);

    Calendar currentCal = Calendar.getInstance();
    long currentTIme = currentCal.getTimeInMillis();

    // if there's not an Alarm already set then set one
    if (!isAlarmSet(this)) {
        Timber.i("Alarm not set - so set one");
        alarm.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                currentTIme + TWO_MINS_DURATION, TWO_MINS_DURATION, pendingIntent);
    }

}

并且我可以验证我是否正确设置了警报，因为我在 logcat 中看到了我使用 Timber 记录的消息.

and I can verify that I set the alarm correctly since I see in my logcat the messages I log with Timber.

我的接收器类是:

public class PatientAlarmReceiver extends BroadcastReceiver {

public static final String TAG = "PATIENT-ALARM-RECEIVER";
public static final String PATIENT_START_ALARM_ACTION = "bp.headsup.receivers.alarm.patient";

@Override
public void onReceive(Context context, Intent intent) {
    Log.i(TAG, "Inside OnReceive Patient");
    Timber.i("Inside OnReceive Patient");

    if (intent == null || intent.getAction() == null) {
        return;
    }

    String action = intent.getAction();
    if (PATIENT_START_ALARM_ACTION.equalsIgnoreCase(action)) {
        onStartCheckForConnectionRequest(context);
    }
}

/**
 * If is connected to network starts services
 */
private void onStartCheckForConnectionRequest(Context context) {
    NetworkUtils networkUtils = new NetworkUtils(context);
    if (networkUtils.isNetworkConnected()) {
        Intent checkForConnRequestIntent = new Intent(context, PatientCheckForConnectionRequestService.class);
        context.startService(checkForConnRequestIntent);
        Timber.i("Starts Service From PatientALARMMANAGER");
    }
}

}

而且我已经在 Manifest 中声明:

And I have declared in Manifest :

        <!-- Receivers -->
    <receiver
        android:name="bp.headsup.receivers.PatientAlarmReceiver" />

如果我运行:adb shell dumpsys alarm我可以看到:

Also if I run : adb shell dumpsys alarm I can see :

  ELAPSED_WAKEUP #0: Alarm{42d804e8 type 2 bp.headsup.mock}
operation=PendingIntent{42d0c230: PendingIntentRecord{42d0f000 bp.headsup.mock broadcastIntent}}

上面回复中的 Mock 是我正在使用的 sourceSet - 不知道它是否与此有关，我只是提到它.

Mock in the above response is the sourceSet I'm using - dont know if it has anything to do with this I just mention it.

问题是我从来没有在 logcat 中读取过我的 Receiver 类的 onReceive 中的消息，显然没有服务启动.任何人都可以帮忙吗?我使用的是运行 kitKat 4.4 (api 19) 的设备，但我也用模拟器尝试过，结果是一样的.

The problem is I never read in logcat the messages I have in onReceive on my Receiver class, and obviously no service starts. Anyone can help with that ? I'm using a device which runs with kitKat 4.4 (api 19) but I have tried it with an emulator too and the result was the same.

推荐答案

您正在设置 ELAPSED_REALTIME 警报，该警报基于自上次启动以来的时间.但是，您传递的是基于挂钟"的开始时间，因此您的闹钟实际上设置在相当远的将来.

You're setting an ELAPSED_REALTIME alarm, which is based on the time since the last boot. However, you're passing it a starting time based on the "wall clock", so your alarm is actually set quite far in the future.

您可以将闹钟更改为 RTC 类型，或从 SystemClock.elapsedRealtime() 获取开始时间.鉴于您所描述的行为，保持已用类型并更正开始时间似乎是合适的.

You can either change the alarm to an RTC type, or get the starting time from SystemClock.elapsedRealtime(). Given your described behavior, keeping the elapsed type and correcting the starting time seems appropriate.

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