应用程序被终止时，Android通知操作按钮不起作用

我正在创建我的第一个android应用程序，这是一个词汇测验。 我尝试每小时发送一次通知（使用PeriodicWorkRequest-WorkManager）。我注意到，当应用程序被终止时，通知会不断发出，但操作按钮不起作用

这是我的Worker类中的发送通知方法：

public void sendNot(Word word, int wordNum) {
            Intent activityIntent = new Intent(getApplicationContext(), WordStatsActivity.class);
            activityIntent.putExtra("word_exists", word);
            PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext()
                    , 0, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);

            Intent knewBroad = new Intent(getApplicationContext(), MainActivity.NotificationBroadcast.class);
            knewBroad.setAction(KNEW_WORD);
            knewBroad.putExtra("word", word);
            PendingIntent knewIntent = PendingIntent.getBroadcast(getApplicationContext(),
                    0, knewBroad, PendingIntent.FLAG_UPDATE_CURRENT);

            Intent didntKnowBroad = new Intent(getApplicationContext(), MainActivity.NotificationBroadcast.class);
            didntKnowBroad.setAction(DIDNT_KNOW_WORD);
            didntKnowBroad.putExtra("word", word);
            PendingIntent didntKnow = PendingIntent.getBroadcast(getApplicationContext(),
                    0, didntKnowBroad, PendingIntent.FLAG_UPDATE_CURRENT);

            Intent stopShowBroad = new Intent(getApplicationContext(), MainActivity.NotificationBroadcast.class);
            stopShowBroad.setAction(NOTIFCATION_OFF);
            stopShowBroad.putExtra("word", word);
            PendingIntent stopShowIntent = PendingIntent.getBroadcast(getApplicationContext(),
                    0, stopShowBroad, PendingIntent.FLAG_UPDATE_CURRENT);


            Notification notification = new NotificationCompat.Builder(getApplicationContext(), CHANNEL_1_ID)
                    ...
                    .addAction(R.mipmap.ic_launcher, "know", knewIntent)
                    .addAction(R.mipmap.ic_launcher, "don't know", didntKnow)
                    .addAction(R.mipmap.ic_launcher, "don't show again", stopShowIntent)
                    ...
                    .build();
            notificationManager.notify(word.getId(), notification);
        }

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如果您需要更多信息，请告诉我

确保推送通知负载中不存在通知密钥。有效负载主体中将仅存在数据密钥

不要使用此（示例）

改用此（示例）：

{
    "to": "a6345d0278adc55d3474f5",
    "data": {
        "message": "Hello World!"
    }
}

---

尝试查看日志中是否有错误

当应用程序被杀死时，您的所有对象都将被销毁。当您单击您的操作时，它们必须是新实例化的。您可能有一个

NullPointerException

的地方，在正常的生命周期中使用时，对象显然不是

null

，但它变成了null，因为您没有在

BroadcastReceiver

中再次实例化它，实际上我没有使用json

{
    "to": "a6345d0278adc55d3474f5",
    "data": {
        "message": "Hello World!"
    }
}