解决Android O 错误Context.startForegroundService() did not then call Service.startForeground

原因分析
Android 8.0 有以下调整：
Android 8.0 的应用尝试在不允许其创建后台服务的情况下使用 startService() 函数，则该函数将引发一个 IllegalStateException。

新的 Context.startForegroundService() 函数将启动一个前台服务。现在，即使应用在后台运行，系统也允许其调用 Context.startForegroundService()。
应用必须在创建服务后的五秒内调用该服务的 startForeground() 函数。
app代码：

Intent intent = new Intent(this, TestService.class);
intent.putExtra("type",1);
 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
     startForegroundService(intent);
 } else {
     startService(intent);
 }

TestService代码

   private NotificationManager notificationManager;
    private static final String NOTIFICATION_ID = "channedId";
    private static final String NOTIFICATION_NAME = "channedId";
    @Override
    public void onCreate() {
        notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        //创建NotificationChannel
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
            NotificationChannel channel = new NotificationChannel(NOTIFICATION_ID, NOTIFICATION_NAME, NotificationManager.IMPORTANCE_HIGH);
            notificationManager.createNotificationChannel(channel);
        }
        startForeground(1,getNotification());       
    }
      @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
    private Notification getNotification() {
        Notification.Builder builder = new Notification.Builder(this)
                .setSmallIcon(R.drawable.ic_launcher_background)
                .setContentTitle("测试服务")
                .setContentText("我正在运行");
        //设置Notification的ChannelID,否则不能正常显示
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            builder.setChannelId(NOTIFICATION_ID);
        }
        Notification notification = builder.build();
        return notification;
    }