Android 警报不重复

Question

我在这里查看了很多解决方案，但我似乎仍然无法每 30 秒发出一次启动服务的警报。 30 秒仅用于测试。闹钟设置代码如下，

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

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

    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.add(Calendar.SECOND, 7); // first time

    long frequency= 60 * 500; // in ms
    alarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
            (SystemClock.elapsedRealtime() + frequency),
            frequency, pendingIntent);

manifest.xml

<service android:name=".heart_rate.HeartRateService"/>

我有一个心脏传感器服务，可以读取可穿戴设备上的心率 15 秒，然后我使用 stopSelf() 停止它。我想这可能是原因，但即使我把它取出来，它仍然不起作用。

private void sendMessage(int heartRate, long dateTime) {
    Log.d(TAG, "sendMessage: ");
    PutDataMapRequest dataMap = PutDataMapRequest.create(WEARABLE_DATA_PATH);
    dataMap.getDataMap().putInt("reading", heartRate);
    dataMap.getDataMap().putLong("date_time", dateTime);
    dataMap.getDataMap().putInt("sensor_type", mHeartSensor.getType());
    PutDataRequest dataRequest = dataMap.asPutDataRequest();
    PendingResult<DataApi.DataItemResult> pendingResult =
            Wearable.DataApi.putDataItem(mGoogleApiClient, dataRequest);

    new HeartRateService.SendMessageToDataLayer(WEARABLE_DATA_PATH, dataRequest).start();

    stopSelf();
}

Answer 1

事实证明我一直都没有启动我的服务，所以它在醒来时什么也没做。我创建了这个简单的广播接收器以在每个时间间隔启动服务。浪费了无数小时，但吸取了教训。

public class HeartRateServiceStarter extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Intent service = new Intent(context, HeartRateService.class);
        context.startService(service);
    }
}

Android 警报不重复

Android alarm not repeating

service

android

alarmmanager