Question

我正在开发一个Android通知应用程序，该应用程序会更新UI并每隔X秒通知一次。

我需要启动服务，比较并存储一些变量，通知和更新UI，每隔x秒重复一次。问题在于每次都会调用BroadcastReceiver的onReceive（）和JobIntentService的onCreate（）。

我需要一个可以保持状态的AlarmManager / JobIntentService。

MainActivity（更新UI）-> AlarmManager-> BroadcastReceiver-> JobIntentService（获取数据并发送通知）

从MainActivity调用AlarmManager：

public void startAlarm() {
    Intent myAlarm = new Intent(getApplicationContext(), AlarmReceiver.class);
    myAlarm.putExtra("messenger", new Messenger(handler));
    PendingIntent recurringAlarm = PendingIntent.getBroadcast(getApplicationContext(), 0, myAlarm, PendingIntent.FLAG_CANCEL_CURRENT);
    AlarmManager alarms = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
    alarms.setInexactRepeating(AlarmManager.RTC_WAKEUP, Calendar.getInstance().getTimeInMillis(), SimpleJobIntentService.interval * 1000, recurringAlarm);
}

广播接收器：

public class AlarmReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    Intent myService = new Intent(context, SimpleJobIntentService.class);
    myService.putExtra("messenger", (Messenger) intent.getExtras().get("messenger"));
    SimpleJobIntentService.enqueueWork(context, myService);
}
}

JobIntentService：

public class SimpleJobIntentService extends JobIntentService {

static final int JOB_ID = 1000;

private Messenger messenger;

static void enqueueWork(Context context, Intent work) {
    enqueueWork(context, SimpleJobIntentService.class, JOB_ID, work);
}

@Override
public void onCreate() {
    super.onCreate();
    Bundle bundle = intent.getExtras();
    if (bundle != null) {
        messenger = (Messenger) bundle.get("messenger");
    }
    // createNotificationChannel
    // init     
}


@Override
protected void onHandleWork(Intent intent) {
     // get data from DB, compare variables and store them in another variable
     // notify
     // send message to MainActivity's Handler
}
}

有状态的AlarmManager吗？

0 个答案: