android firebase通知不起作用

Question

我使用我的应用程序设置了 Firebase 消息，但不幸的是，通知没有出现。

我正确地设置了Firebase，它连接到我的应用程序，我也发送了一些测试消息，在Firebase中它说已完成，但是我没有在我的手机上收到它们。

我的应用程序还没有上市，我正在通过Android Studio开发和测试它。

这是我的MyFirebaseInstanceIDService类

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {

private static final String TAG = "MyFirebaseIIDService";

/**
 * Called if InstanceID token is updated. This may occur if the security of
 * the previous token had been compromised. Note that this is called when the InstanceID token
 * is initially generated so this is where you would retrieve the token.
 */
// [START refresh_token]
@Override
public void onTokenRefresh() {
    // Get updated InstanceID token.
    String refreshedToken = FirebaseInstanceId.getInstance().getToken();
    Log.d(TAG, "Refreshed token: " + refreshedToken);


    // TODO: Implement this method to send any registration to your app's servers.
    sendRegistrationToServer(refreshedToken);
}
// [END refresh_token]

/**
 * Persist token to third-party servers.
 *
 * Modify this method to associate the user's FCM InstanceID token with any server-side account
 * maintained by your application.
 *
 * @param token The new token.
 */
private void sendRegistrationToServer(String token) {
    // Add custom implementation, as needed.
}

}

这里来了我的火库消息服务类：

公共类MyFirebaseMessagingService扩展了FirebaseMessagingService{私有静态最终字符串TAG="MyFirebaseMsgService"；

/**
 * Called when message is received.
 *
 * @param remoteMessage Object representing the message received from Firebase Cloud Messaging.
 */
// [START receive_message]
@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    // [START_EXCLUDE]
    // There are two types of messages data messages and notification messages. Data messages are handled
    // here in onMessageReceived whether the app is in the foreground or background. Data messages are the type
    // traditionally used with GCM. Notification messages are only received here in onMessageReceived when the app
    // is in the foreground. When the app is in the background an automatically generated notification is displayed.
    // When the user taps on the notification they are returned to the app. Messages containing both notification
    // and data payloads are treated as notification messages. The Firebase console always sends notification
    // messages. For more see: https://firebase.google.com/docs/cloud-messaging/concept-options
    // [END_EXCLUDE]


    //"Title","Message","NotyType",   "hotelStatus"

    String title = "";
    if (remoteMessage.getNotification().getTitle() != null){
        title = remoteMessage.getNotification().getTitle();
    }

    String message = "";
    if (remoteMessage.getNotification().getBody() != null){
        message = remoteMessage.getNotification().getBody();
    }

    Log.e("notification","recieved");


    sendNotification(title, message);
    // Also if you intend on generating your own notifications as a result of a received FCM
    // message, here is where that should be initiated. See sendNotification method below.
}
// [END receive_message]


private void sendNotification(String title, String body) {
    Intent i = new Intent(this, MainActivity.class);
    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pi = PendingIntent.getActivity(this,
            0 /* Request code */,
            i,
            PendingIntent.FLAG_ONE_SHOT);

    Uri sound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

    NotificationCompat.Builder builder = new NotificationCompat.Builder(this,
            getString(R.string.default_notification_channel_id))
            .setSmallIcon(R.mipmap.ic_launcher)
            .setContentTitle(title)
            .setContentText(body)
            .setAutoCancel(true)
            .setSound(sound)
            .setContentIntent(pi);

    NotificationManager manager =
            (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    assert manager != null;
    manager.notify(0, builder.build());
} }

调试时没有看到任何html" target="_blank">日志，手机上也没有收到任何通知。

我在这里做错了什么吗？你能给点建议吗？谢谢。

Answer 1

哦，现在我尝试了一些东西！我更新了我的MyFirebaseMessagingService类，正如你现在在我的问题中看到的，现在它工作了！从Firebase控制台，我只发送消息，没有数据，所有的通知，我收到了我的设备！即使我的应用程序正在运行，即使我关闭了它！我收到的每一份通知。当应用程序运行时，通知有我的自定义图标，当应用程序关闭时，默认的“铃”图标在那里，但在这两种情况下，我收到了通知！不知道怎么可能，但确实有效。

Answer 2

onMessageReceived不会使用仅带有通知标记的推送发送来调用，并且您的应用程序不在前台。如果它确实在前台，将调用您的onMessageReceived。

如果您想触发onMessageReceived，则需要发送带有附加数据标记或仅带有数据标记的推送。

但是请注意，如果您同时发送通知和数据标记，则只有当应用程序位于前台时，才会触发onMessageReceived。如果应用程序位于后台，则数据标记内的所有内容都将作为附加内容在点击意图内传递

无论应用程序是否在前台，只有Data标记总是调用onMessageReceived。

例如：仅针对数据标记:)

https://fcm.googleapis.com/fcm/send
Content-Type:application/json
Authorization:key=AIzaSyZ-1u...0GBYzPu7Udno5aA

{ "data": {
    "score": "5x1",
    "time": "15:10"
  },
  "to" : "bk3RNwTe3H0:CI2k_HHwgIpoDKCIZvvDMExUdFQ3P1..."
}