使用广播接收器关闭通知

Question

我无法取消在Service（在Android WearOS中）中启动的通知。

我使用以下代码创建通知：

// Create notification
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context, 101);

// Create action
Intent cancelIntent = new Intent(context, CancelNotification.class);
PendingIntent cancelPendingIntent =
        PendingIntent.getBroadcast(
                context,
                0,
                cancelIntent ,
                PendingIntent.FLAG_UPDATE_CURRENT
        );
NotificationCompat.Action action =
        new NotificationCompat.Action.Builder(
                R.drawable.ic_cancel,
                cancelPendingIntent)
                .build();

notificationBuilder.addAction(action);

// Configure notification
Notification notification = notificationBuilder
        .setContentTitle("Title")
        .setContentText("Text")
        .setSmallIcon(R.drawable.ic_icon)
        .setDefaults(NotificationCompat.DEFAULT_ALL)
        .setCategory(Notification.CATEGORY_ALARM)
        .setPriority(NotificationManager.IMPORTANCE_HIGH)
        .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
        .build();

// Launch notification
context.startForeground("919", notification);

我正在尝试使用BroadcastReceiver取消通知：

public class CancelNotification extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        System.out.println("CANCELING");
        NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        nm.cancelAll();    
    }
}

但这是行不通的（甚至cancellAll或按ID取消）。 有人知道发生了什么吗？