每天触发多个通知

Question

我想每天在特定时间（t1，t2，t3，t4，t5）发出5条通知。我必须每天从JSON内部获取这些时间变量，因为它们每天都是不同的值。即使Android应用程序在后台，也必须触发该通知。

MyWorker类别

public Result doWork() {
    sendNotification();
    return Result.SUCCESS;
}

public void sendNotification() {
    NotificationManager notificationManager = (NotificationManager) getApplicationContext().getSystemService(Context.NOTIFICATION_SERVICE);

    //If on Oreo then notification required a notification channel.
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
        NotificationChannel channel = new NotificationChannel("default", "Default", NotificationManager.IMPORTANCE_DEFAULT);
        notificationManager.createNotificationChannel(channel);
    }

    NotificationCompat.Builder notification = new NotificationCompat.Builder(getApplicationContext(), "default")
            .setContentTitle("Hello")
            .setContentText("there")
            .setSmallIcon(R.mipmap.ic_launcher);

    notificationManager.notify(1, notification.build());
}

---

我的登录活动

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    Window w = getWindow();
    w.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
    w.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
}

btnLogin = findViewById(R.id.login_button);

mWorkManager = WorkManager.getInstance();
mRequest2 = new PeriodicWorkRequest.Builder(MyWorker.class,15, TimeUnit.MINUTES).build();

btnLogin.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        mWorkManager.enqueue(mRequest2);
    }
});

}

我需要一些帮助来澄清。我应该使用两名工作人员，一名每天每天在特定时间从json中获取数据，然后在每个特定时间触发5条通知，或者我该如何解决。非常感谢您的宝贵时间。谢谢！

================================================ ====================

我也经过一天的尝试，但无法正常工作。组合服务，BroadcastReceiver和AlarmManager。

公共类MyService扩展服务{

@Override
public void onCreate() {
    super.onCreate();
}

@Override
public IBinder onBind(Intent intent) {
    return null;
}

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

    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    Intent intent1 = new Intent(this, ShortTimeEntryReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 1, intent1,
            PendingIntent.FLAG_UPDATE_CURRENT);
    Calendar c = Calendar.getInstance();
    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(),AlarmManager.INTERVAL_FIFTEEN_MINUTES,
            pendingIntent);

    return START_STICKY;
}

}

和BroadcastReceiver

公共类ShortTimeEntryReceiver扩展了BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    sendNotification(context);
    context.startService(new Intent(context,MyService.class));

}

public void sendNotification(Context context) {
    NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
        NotificationChannel channel = new NotificationChannel("default", "Default", NotificationManager.IMPORTANCE_DEFAULT);
        notificationManager.createNotificationChannel(channel);
    }

    NotificationCompat.Builder notification = new NotificationCompat.Builder(context, "default")
            .setContentTitle("Hello")
            .setContentText("there")
            .setSmallIcon(R.mipmap.ic_launcher);

    notificationManager.notify(1, notification.build());
}

}

Answer 1

WorkManager不保证准确地运行您的工作人员。您需要将AlarmManager与setExact()一起使用。

个人，我会研究在适当的时候使用从服务器发送到应用程序的setExact()的选项。这对用户而言更加省电，并且由于电池优化，您对现代Android的约束也更少了。