创建了Android服务,以在后台更新位置并将其与Unity集成。服务在启动时可以正常工作,但几个小时后服务停止,并且不会更新用户位置。
下面是 OnStartCommand,OnCreate 和Override方法的代码段。
public int onStartCommand(Intent intent, int flags, int startId)
{
super.onStartCommand(intent, flags, startId);
return START_STICKY;
}
public void onCreate()
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel channel = new NotificationChannel(
"channel_01",
"My Channel",
NotificationManager.IMPORTANCE_DEFAULT
);
NotificationManager notificationManager = getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);
Notification.Builder builder = new Notification.Builder(getApplicationContext(), "channel_01");
startForeground(12345678, builder.build());
}
initializeLocationManager();
stopForeground(true);
}
任何帮助将不胜感激。谢谢
答案 0 :(得分:0)
您是否尝试扩展JobService
?即使重新启动手机,它对我也很好。
public class NotificationService extends JobService {
public static final String TASK_ID = "notification_task_id";
private static final String TAG = "NotificationJobService";
private boolean jobCancelled = false;
private String notificationTaskID;
@Override
public boolean onStartJob(JobParameters params) {
Log.d(TAG, "onStartJob: Job Started");
doBackgroundWork(params);
return true;
}
private void doBackgroundWork(final JobParameters params) {
new Thread(new Runnable() {
@Override
public void run() {
notifiy(params);
}
}).start();
}
public void notifiy(JobParameters params) { // dzieje się w przy notyfikacji
createNotification("Title", "message", 'channelID', getApplicationContext());
jobFinished(params, false);
}
public void createNotification(String aTitle, String aMessage, int channelID, Context context) {
// create your notification here
}
@Override
public boolean onStopJob(JobParameters params) {
Log.d(TAG, "onStopJob: Job Cancelled");
jobCancelled = true;
return true;
}
}
那是你怎么称呼它:
ComponentName componentName = new ComponentName(this, NotificationJobService.class);
JobInfo info = new JobInfo.Builder(123, componentName)
.setRequiresCharging(false)
.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
.setPersisted(true)
.setPeriodic(15*60*1000) // here you set the time
.build();
JobScheduler scheduler = (JobScheduler) getSystemService(JOB_SCHEDULER_SERVICE);
int resultCode = scheduler.schedule(info);
if (resultCode == JobScheduler.RESULT_SUCCESS) {
Log.e(TAG, "scheduleJob: Job scheduled");
} else {
Log.e(TAG, "scheduleJob: Job schedule failed");
}
答案 1 :(得分:0)
如果您需要“永远”运行,则您的服务必须保持为前台。问题在于您正在停止前台。
尝试一下:
import android.app.Notification;
...
public void onCreate()
{
super.onCreate();
...
// Build the notification.
Notification notification = notificationBuilder.build();
// And Start Foreground.
startForeground(SERVICE_ID, notification); // Where SERVICE_ID is any integer.
}
并且:
public int onStartCommand(Intent intent, int flags, int startId)
{
//Return START_STICKY to inform the system that service must be woken up automatically if destroyed
return START_STICKY;
}
注意:您可以参考此示例。 https://github.com/android/location-samples/tree/master/LocationUpdatesForegroundService
编辑:
如果您确实需要在后台(而不是在前台)进行维护,则可以参考Workers。此处更多信息:https://medium.com/androiddevelopers/workmanager-periodicity-ff35185ff006 请记住,后台定位的频率可能较低(每15分钟更新1次)。但是在前台,您可以使其更加频繁。