Android - Running a background task every 15 minut

问题:

I need to build a background task that runs every 10/15 minutes (doesn't really matter, either is good), even when the application is not running.

How can I accomplish this? I can't seem the wrap my head around this.

I read I could use some sort of runnable() functionality or use a background services or AlarmManager. I was thinking of a background service, since it also must be done when the application itself is not running.

What is a better way of doing this and how could I do it?

回答1:

You have have detemined the amount of time (interval) to execute a snippet of code, its better to use AlarmManager because its more energy effient. If your app needs to listen to some sort of a event , then Service is what you need.

public static void registerAlarm(Context context) {
    Intent i = new Intent(context, YOURBROADCASTRECIEVER.class);

    PendingIntent sender = PendingIntent.getBroadcast(context,REQUEST_CODE, i, 0);

    // We want the alarm to go off 3 seconds from now.
    long firstTime = SystemClock.elapsedRealtime();
    firstTime += 3 * 1000;//start 3 seconds after first register.

    // Schedule the alarm!
    AlarmManager am = (AlarmManager) context
            .getSystemService(ALARM_SERVICE);
    am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, firstTime,
            600000, sender);//10min interval

}

回答2:

Alarm Manager (system service) vs Remote Service with inner alarm implementation (separate process)?

Alarm Manager is your choice, because it already has what you need, you just have to set alarm intervals

回答3:

You can also achieve this via a SyncAdapter Here's a sample for your to look at and get inspired

SyncAdapter sample

回答4:

The best approach was introduced at Google I/O 2018 - WorkManager.

You can find documentation here.