我在安卓的自定义通知中遇到了问题。

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我在安卓的自定义通知中遇到了问题。

这是我的Firebase消息服务代码文件。我的服务没有被调用。

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());
    }
}

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1 答案

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在安卓中，我在自定义通知方面遇到了问题。如果你没有收到任何远程消息或者你的服务不起作用，可以查看StackOverflow链接。

要创建自定义通知频道，可以使用以下代码：

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());
}

上述代码在接收到远程消息后可以正常工作。如果想要添加自定义布局，则可以使用以下代码：

// 获取自定义通知的布局
RemoteViews notificationLayout = new RemoteViews(getPackageName(), R.layout.notification_small);
RemoteViews notificationLayoutExpanded = new RemoteViews(getPackageName(), R.layout.notification_large);
// 将布局应用到通知中
Notification customNotification = new NotificationCompat.Builder(context, CHANNEL_ID)
        .setSmallIcon(R.drawable.notification_icon)
        .setStyle(new NotificationCompat.DecoratedCustomViewStyle())
        .setCustomContentView(notificationLayout)
        .setCustomBigContentView(notificationLayoutExpanded)
        .build();

自定义通知布局的更多信息可以参考这里。

注意：在安卓10及以上版本中，通知服务在后台不会被调用。你会收到通知，但是自定义的设计不会生效。如果你想要在后台接收通知，你需要监听Firebase消息事件的广播接收器，并将应用程序唤醒到前台。

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