android - Android - 每 30 分钟获取一次位置

Question

我知道这个问题已被问过很多次，但我找不到适合我的问题的答案。

我有一个应用程序，它必须每 30 分钟知道一次用户的位置（为了做特定的事情）。我不希望应用程序检查位置是否已更改。我只需要每 30 分钟获取一次，所以我不想使用 onLocationChanged() 方法。

我使用“被动”方式而不是 gps 或网络方式，所以我不需要“找到”最好的提供商，我已经知道了。

有办法吗？

非常感谢。

朱利安

Answer 1

You could set up an alarm for every 30 minutes and check getLastKnownLocation. However, the last known location is only actively updated if at least 1 app is registered for location updates- so you'll still have to register yourself to make sure that variable is updated.

AlarmManager mgr=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
registerReceiver( receiver, new IntentFilter("broadcast reciever class name here") );
Intent i=new Intent("broadcast reciever class name here");
PendingIntent pi=PendingIntent.getBroadcast(this, 0, i, 0);
mgr.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 30*60*1000, pi);

This will set an alarm for every 30 minutes. If you want this to continue to go off after the activity is dead, set it in a Service.