Android 前台服务始终抛出“java.lang.IllegalArgumentException：服务未注册”异常

我的项目需要一个android前台服务 to 连续运行（即使在应用程序被销毁之后）。为此，我有以下代码片段：

构建.gradle

implementation fileTree(dir: 'libs', include: ['*.jar'])
//noinspection GradleCompatible
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:design:28.0.0'
implementation 'com.google.android.gms:play-services-maps:16.1.0'
implementation 'com.google.android.gms:play-services-places:16.0.0'
implementation 'com.google.android.libraries.places:places:1.1.0'
implementation 'com.google.android.gms:play-services-location:16.0.0'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'com.google.android.gms:play-services-ads:17.2.0'

清单权限

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NOTIFICATION_POLICY" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

MainActivity.java

@Override
public void onCreate() {
    Intent intent = new Intent(getApplicationContext(), MyService.class);
    if (!isMyServiceRunning(MyService.class, MainActivity.this)) {
        intent.setAction(MYConstants.ACTION_START_GPS_SERVICE);
        intent.setAction(MyConstants.ACTION_START_GPS_SERVICE);
        startService(intent);
        Log.i(TAG, "MyService call made.");
    }
}

MyService.java

public class MyService extends Service {
       @Override
       public void onCreate() {
           super.onCreate();
           if (Build.VERSION.SDK_INT > Build.VERSION_CODES.O) {
               startServiceWithNotification();
           } else{
               startForeground(9999, new Notification());
           }
       }

       @Override
       public int onStartCommand(Intent intent, int flags, int startId) {
            super.onStartCommand(intent, flags, startId);
            return START_STICKY;
       }

       @Override
       public void onTaskRemoved(Intent rootIntent){
          stopMyService();
          Intent broadcastIntent = new Intent(this, MyBroadcastReceiver.class);
          sendBroadcast(broadcastIntent);
       }

       @Override
       public void onDestroy() {
           stopMyService();
           super.onDestroy();
      }

      @Override
      public IBinder onBind(Intent intent) {
           // Used only in case of bound services.
           return null;
     }

     void stopMyService() {
          stopForeground(true);
          stopSelf();
     }

     @RequiresApi(Build.VERSION_CODES.O)
     void startServiceWithNotification() {
        String channelId = "com.mypackage.myapp";
        String channelName = "Your Service";

        NotificationChannel chan;

        chan = new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_NONE);
        chan.setLightColor(Color.BLUE);
        chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
        NotificationManager mNotificationManager = (NotificationManager) 
               getSystemService(Context.NOTIFICATION_SERVICE);
        mNotificationManager.createNotificationChannel(chan);


        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, 
              channelId);

        Notification notification = notificationBuilder.setOngoing(true)
            .setSmallIcon(R.drawable.ic_launcher_foreground)
            .setContentTitle("App is running in background")
            .setPriority(NotificationManager.IMPORTANCE_MIN)
            .setCategory(Notification.CATEGORY_SERVICE)
            .build();
        startForeground(10000, notification);
    }
}

MyBroadcastReceiver.java

@Override
public void onReceive(Context context, Intent intent) {
    Intent intent =  new Intent(context, MyService.class);
    intent.setAction(MYConstants.ACTION_START_GPS_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        context.startForegroundService(intent);
        Log.i(TAG, "MyService call made.");
    } else {
        context.startService(intent);
    }
}

该应用程序按预期工作，前台服务运行良好，即使在应用程序被销毁后也能正常执行其预期的操作，但我始终看到Warning as an 非法参数异常运行应用程序时。例外情况附在下面：

D/EGL_emulation: eglMakeCurrent: 0xdda12a20: ver 3 0 (tinfo 0xdda81230)
W/System: A resource failed to call close. 
W/ConnectionTracker: Exception thrown while unbinding
   java.lang.IllegalArgumentException: Service not registered: ll@85f600c
       at android.app.LoadedApk.forgetServiceDispatcher(LoadedApk.java:1731)
       at android.app.ContextImpl.unbindService(ContextImpl.java:1755)
       at android.content.ContextWrapper.unbindService(ContextWrapper.java:735)
       at ce.b(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700-0):1)
       at ce.a(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700-0):5)
       at lm.A(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700-0):10)
       at kx.a(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700-0):3)
       at dx.run(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700- 
          0):2)
       at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:462)
       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
       at iv.run(:com.google.android.gms.dynamite_measurementdynamite@[email protected] (100700- 
         0):15)
 W/.myapp: Reducing the number of considered missed Gc histogram windows from 186 to 100
 W/System: A resource failed to call close. 

有人可以帮我理解为什么总是抛出这个异常以及如何解决这个问题吗？

正如 @CommonsWare 在上面的评论中所建议的，这里观察到的异常是由 Play Services 记录的，这很常见，并不是应用程序的结果。 除非异常导致严重问题（例如应用程序崩溃），否则不应将此类异常视为痛点。