android - 不从 AlarmManager 调用 BroadcastReceiver

Question

我不想看到 Oreo 的 AlarmManager setExactAndAllowWhileIdle 是如何工作的，并为此编写了非常简单的服务，但它不起作用，我真的不明白原因。到目前为止我看到的所有原因都与我的代码无关。请指导我哪里出错了。

主 Activity

   private void startService() {
            Log.d("testt", "MainActivity - startService");
            Intent intent = new Intent(this, LocationReceiver.class);
           PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 1,intent,PendingIntent.FLAG_UPDATE_CURRENT ); 
 AlarmManager alarmManager =(AlarmManager)getSystemService(ALARM_SERVICE);
                    alarmManager.setExactAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP, System.currentTimeMillis() +  60 * 1000, pendingIntent);
         }

广播接收者

public class LocationReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d("testt", "LocationReceiver - onReceive");
        Intent i = new Intent(context, LocationService.class);
        context.startService(intent);
    }
}

服务

public class LocationService extends IntentService {
    public LocationService() {
        super("any_name");
    }

    @Override
    protected void onHandleIntent(@Nullable Intent intent) {
        Log.d("testt", "LocationService - onHandleIntent");
    }
}

终于显现

    <service android:name=".LocationService" android:exported="false"/>
    <receiver android:name=".LocationReceiver"/>
</application>

Answer 1

关于您 Activity 中的这行代码:

alarmManager.setExactAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP, System.currentTimeMillis() +  60 * 1000, pendingIntent);

您想要使用 SystemClock.elapsedRealtime() 而不是 System.currentTimeMillis()；您的代码应如下所示:

alarmManager.setExactAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() +  60 * 1000, pendingIntent);

您需要使用自设备启动以来的毫秒数开始间隔时间计算，而不是自 1/1/1970 以来的毫秒数。