onMessageReceived(RemoteMessage remoteMessage) 方法基于以下情况调用。
- FCM响应 带有 notification 和 data 块:
{
"to": "device token list",
"notification": {
"body": "Body of Your Notification",
"title": "Title of Your Notification"
},
"data": {
"body": "Body of Your Notification in Data",
"title": "Title of Your Notification in Title",
"key_1": "Value for key_1",
"image_url": "www.abc.com/xyz.jpeg",
"key_2": "Value for key_2"
}
}
- 前台应用:
onMessageReceived(RemoteMessage remoteMessage) 被调用,将在通知栏中显示大图标和大图片。我们可以从通知和数据块中读取内容。
- 后台应用:
onMessageReceived(RemoteMessage remoteMessage) 不会被调用,系统托盘将接收消息并从通知块中读取主体和标题,并在通知栏中显示默认的消息和标题。
在这种情况下,从 json 中删除通知块。
{
"to": "device token list",
"data": {
"body": "Body of Your Notification in Data",
"title": "Title of Your Notification in Title",
"key_1": "Value for key_1",
"image_url": "www.abc.com/xyz.jpeg",
"key_2": "Value for key_2"
}
}
调用onMessageReceived()的解决方案:
- 应用在前台:
onMessageReceived(RemoteMessage remoteMessage) 被调用,通知栏显示 LargeIcon 和 BigPicture。我们可以从notification和data块中读取内容。
- 应用在后台:
onMessageReceived(RemoteMessage remoteMessage) 被调用,系统托盘将不会收到消息,因为响应中没有notification键。通知栏显示 LargeIcon 和 BigPicture。
代码
private void sendNotification(Bitmap bitmap, String title, String
message, PendingIntent resultPendingIntent) {
NotificationCompat.BigPictureStyle style = new NotificationCompat.BigPictureStyle();
style.bigPicture(bitmap);
Uri defaultSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
String NOTIFICATION_CHANNEL_ID = mContext.getString(R.string.default_notification_channel_id);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "channel_name", NotificationManager.IMPORTANCE_HIGH);
notificationManager.createNotificationChannel(notificationChannel);
}
Bitmap iconLarge = BitmapFactory.decodeResource(mContext.getResources(),
R.drawable.mdmlogo);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(mContext, NOTIFICATION_CHANNEL_ID)
.setSmallIcon(R.drawable.mdmlogo)
.setContentTitle(title)
.setAutoCancel(true)
.setSound(defaultSound)
.setContentText(message)
.setContentIntent(resultPendingIntent)
.setStyle(style)
.setLargeIcon(iconLarge)
.setWhen(System.currentTimeMillis())
.setPriority(Notification.PRIORITY_MAX)
.setChannelId(NOTIFICATION_CHANNEL_ID);
notificationManager.notify(1, notificationBuilder.build());
}
参考链接:
https://firebase.google.com/docs/cloud-messaging/android/receive