我在android的自定义通知中遇到问题

这是我的firebase消息服务代码文件。我的服务没有被呼叫

public class NotificationService extends FirebaseMessagingService {
    String myTitle, myImage;
    
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {

        myTitle = remoteMessage.getData().get("title");
        myImage = remoteMessage.getData().get("body");
        Log.d("Service","Hi this is service");
        //bitmap = getBitmapfromUrl(myImage);
        //Toast.makeText(this,"Hi test",Toast.LENGTH_SHORT).show();
        showNotification(myTitle,myImage);
    }

    

    private void showNotification(String myTitle,String myImage) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.putExtra("Notification_Title", "yes");
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        //Toast.makeText(this,title,Toast.LENGTH_SHORT).show();
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
                PendingIntent.FLAG_ONE_SHOT);
        String channelId = "Custom_Notification";
        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder =
                new NotificationCompat.Builder(this, channelId)
                        .setSmallIcon(R.drawable.ic_notifications_none_white_24dp)
                        .setContentTitle(myTitle)
                        .setContentText(myImage)
                        .setSound(defaultSoundUri)
                        .setContentIntent(pendingIntent);
        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel(channelId,
                    "Custom Notification",
                    NotificationManager.IMPORTANCE_HIGH);
            notificationManager.createNotificationChannel(channel);
        }
        notificationManager.notify(0, notificationBuilder.build());
    }
}

---

如果您没有收到任何远程消息或您的服务无法正常工作，请查看链接

创建自定义通知通道的步骤

private void showNotification(String myTitle,String myImage) {
      Intent intent = new Intent(this, MainActivity.class);
      intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
      intent.putExtra("Notification_Title", "yes");

      PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
        PendingIntent.FLAG_ONE_SHOT);

      String channelId = "Custom_Notification";
      Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
      NotificationCompat.Builder notificationBuilder =
      new NotificationCompat.Builder(this, channelId)
                .setSmallIcon(R.drawable.ic_notifications_none_white_24dp)
                .setContentTitle(myTitle)
                .setContentText(myImage)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent)
                .setDefaults(NotificationCompat.DEFAULT_ALL)
                .setAutoCancel(true)
                .setPriority(NotificationCompat.PRIORITY_HIGH);
NotificationManager notificationManager =
        (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    NotificationChannel channel = new NotificationChannel(channelId,
            "Custom Notification",
            NotificationManager.IMPORTANCE_HIGH);
    notificationManager.createNotificationChannel(channel);
}
notificationManager.notify(0, notificationBuilder.build());      }     

收到远程消息后，上述代码工作正常。如果要添加任何自定义布局，请使用以下代码

    // Get the layouts to use in the custom notification
    RemoteViews notificationLayout = new RemoteViews(getPackageName(),           R.layout.notification_small);
     RemoteViews notificationLayoutExpanded = new RemoteViews(getPackageName(), R.layout.notification_large);

    // Apply the layouts to the notification
     Notification customNotification = new NotificationCompat.Builder(context, CHANNEL_ID)
            .setSmallIcon(R.drawable.notification_icon)
            .setStyle(new NotificationCompat.DecoratedCustomViewStyle())
            .setCustomContentView(notificationLayout)
            .setCustomBigContentView(notificationLayoutExpanded)
            .build();

---

注意：在android 10及以上版本中，通知服务基本上不是在后台调用的。您将收到一个通知，但它不会反映自定义设计。不过，如果您也希望在后台接收通知。然后收听firebase消息事件的广播接收器。此时，您必须将应用程序唤醒到前台。

如果您没有收到任何远程消息或您的服务无法正常工作，请查看链接

创建自定义通知通道的步骤

private void showNotification(String myTitle,String myImage) {
      Intent intent = new Intent(this, MainActivity.class);
      intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
      intent.putExtra("Notification_Title", "yes");

      PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
        PendingIntent.FLAG_ONE_SHOT);

      String channelId = "Custom_Notification";
      Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
      NotificationCompat.Builder notificationBuilder =
      new NotificationCompat.Builder(this, channelId)
                .setSmallIcon(R.drawable.ic_notifications_none_white_24dp)
                .setContentTitle(myTitle)
                .setContentText(myImage)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent)
                .setDefaults(NotificationCompat.DEFAULT_ALL)
                .setAutoCancel(true)
                .setPriority(NotificationCompat.PRIORITY_HIGH);
NotificationManager notificationManager =
        (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    NotificationChannel channel = new NotificationChannel(channelId,
            "Custom Notification",
            NotificationManager.IMPORTANCE_HIGH);
    notificationManager.createNotificationChannel(channel);
}
notificationManager.notify(0, notificationBuilder.build());      }     

收到远程消息后，上述代码工作正常。如果要添加任何自定义布局，请使用以下代码

    // Get the layouts to use in the custom notification
    RemoteViews notificationLayout = new RemoteViews(getPackageName(),           R.layout.notification_small);
     RemoteViews notificationLayoutExpanded = new RemoteViews(getPackageName(), R.layout.notification_large);

    // Apply the layouts to the notification
     Notification customNotification = new NotificationCompat.Builder(context, CHANNEL_ID)
            .setSmallIcon(R.drawable.notification_icon)
            .setStyle(new NotificationCompat.DecoratedCustomViewStyle())
            .setCustomContentView(notificationLayout)
            .setCustomBigContentView(notificationLayoutExpanded)
            .build();

注意：在android 10及以上版本中，通知服务基本上不是在后台调用的。您将收到一个通知，但它不会反映自定义设计。不过，如果您也希望在后台接收通知。然后收听firebase消息事件的广播接收器。此时，你必须将应用程序唤醒到前台