1. 确保图标资源文件被正确命名并放置在drawable文件夹下。
2. 使用 NotificationCompat.Builder 的 setAutoAction() 方法设置操作项时，确保将正确的资源ID传递给 setCustomAction() 方法的第二个参数。 例如：

NotificationCompat.Action customAction = new NotificationCompat.Action.Builder(
            R.drawable.ic_custom_action, "Custom Action",
            customActionPendingIntent).build();

NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
            .setSmallIcon(R.drawable.ic_notification)
            .setContentTitle("My Notification Title")
            .setContentText("This is my notification content.")
            .setAutoAction(customAction);

3. 如果您是使用 RemoteViews 创建自定义通知布局，请确保使用 setImageViewResource() 方法将正确的图标资源 ID 分配给操作项图标视图。例如：

RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.my_custom_notification);
remoteViews.setImageViewResource(R.id.custom_action_icon, R.drawable.ic_custom_action);

// Set custom action
Intent customActionIntent = new Intent(this, MyBroadcastReceiver.class);
customActionIntent.setAction("com.example.CUSTOM_ACTION");
PendingIntent customActionPendingIntent = PendingIntent.getBroadcast(this, 0, customActionIntent, PendingIntent.FLAG_UPDATE_CURRENT);

remoteViews.setOnClickPendingIntent(R.id.custom_action_button, customActionPendingIntent);

NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
            .setSmallIcon(R.drawable.ic_notification)
            .setContentTitle("My Notification Title")
            .setContentText("This is my notification content.")
            .setCustomContentView(remoteViews);