How can I start an alarm using background services when we receive notification ?
When my application is active then background service start easily, but when application is on background then background services can't run.
1. Why is this happening?
There are two types of messages in FCM (Firebase Cloud Messaging):
Display Messages: These messages trigger the onMessageReceived() callback only when your app is in foreground
Data Messages: Theses messages trigger the onMessageReceived() callback even if your app is in foreground/background/killed
override fun onMessageReceived(remoteMessage: RemoteMessage) {
// ...
// TODO(developer): Handle FCM messages here.
// Not getting messages here? See why this may be:
Log.d(TAG, "From: ${remoteMessage.from}")
// Check if message contains a data payload.
if (remoteMessage.data.isNotEmpty()) {
Log.d(TAG, "Message data payload: ${remoteMessage.data}")
if (/* Check if data needs to be processed by long running job */ true) {
// For long-running tasks (10 seconds or more) use WorkManager.
scheduleJob()
} else {
// Handle message within 10 seconds
handleNow()
}
}
// Check if message contains a notification payload.
remoteMessage.notification?.let {
Log.d(TAG, "Message Notification Body: ${it.body}")
}
// 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.
}
Related
I am using FCM in my project and when trying to test the incoming notifications with the firebase "compose notification" feature I am putting a title, a body and an image URL to the message and it shows what it should look like - a rich notification with image. But the notification that is being sent to me is a normal one without any image.
here is the firebase UI and what is suposed to happen -
My issue is that I am getting only the text, without the image.
here is my MyFirebaseMessagingService class -
public class MyFirebaseMessagingService extends FirebaseMessagingService {
public static final String RECEIVED_FCM_ACTION = "com.onemdtalent.app.RECEIVED_FCM_ACTION";
public static final String BD_KEY_BODY = "BD_KEY_BODY";
#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]
String image = remoteMessage.getData().get("image");
Timber.d("onMessageReceived: %s", remoteMessage.getFrom());
// Check if message contains a notification payload.
if (remoteMessage.getNotification() != null) {
String body = remoteMessage.getNotification().getBody();
Timber.d("Message Notification Body: %s", body);
// broadcast
Intent localIntent = new Intent(RECEIVED_FCM_ACTION);
localIntent.putExtra(BD_KEY_BODY, image);
LocalBroadcastManager.getInstance(this).sendBroadcast(localIntent);
}
}
}
As I sayed, I am getting only the text without the image. what am I missing?
Solved - I used an old version of firebase messaging dependency and I updated it, including my entire project to androidX and now I can see the images :)
Update
onMessageReceived called in API 19 but not on 23 and 24.
Update
I am sending FCM notifications from a server, I can receive notifications but onMessageReceived is not called(foreground, background), even with data messages. This is the code I'm using.
import android.app.PendingIntent;
import android.content.Intent;
import android.util.Log;
import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;
import uk.co.socktchat.socketchat.MainActivity;
public class MyFirebaseMessagingService extends FirebaseMessagingService {
private static final String 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]
// TODO(developer): Handle FCM messages here.
// Not getting messages here? See why this may be:
Log.d(TAG, "From: " + remoteMessage.getFrom());
// Check if message contains a data payload.
if (remoteMessage.getData().size() > 0) {
Log.d(TAG, "Message data payload: " + remoteMessage.getData());
if (/* Check if data needs to be processed by long running job */ true) {
// For long-running tasks (10 seconds or more) use Firebase Job Dispatcher.
scheduleJob();
} else {
// Handle message within 10 seconds
handleNow();
}
}
// Check if message contains a notification payload.
if (remoteMessage.getNotification() != null) {
Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
}
// 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]
/**
* Schedule a job using FirebaseJobDispatcher.
*/
private void scheduleJob() {
// [START dispatch_job]
// [END dispatch_job]
}
/**
* Handle time allotted to BroadcastReceivers.
*/
private void handleNow() {
Log.d(TAG, "Short lived task is done.");
}
/**
* Create and show a simple notification containing the received FCM message.
*
* #param messageBody FCM message body received.
*/
private void sendNotification(String messageBody) {
Intent intent = new Intent(this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
PendingIntent.FLAG_ONE_SHOT);
}
}
My Manifest file
<service
android:name=".fcm.MyFirebaseMessagingService"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT"/>
</intent-filter>
</service>
<!-- [END firebase_service] -->
<!-- [START firebase_iid_service] -->
<service
android:name=".fcm.MyFirebaseInstanceIDService">
<intent-filter>
<action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
</intent-filter>
</service>
json im posting from server
{
"data": {
"title": "5x1",
"body": "15:10"
},
"to" : "d6IJZlXAUZ4:APA91bF8kB_jBn_N93otIdRFsu89ZDhrFsL--i0I4TmS-LO_h3QQ79lu6VlTQe0poNpuUni7N45_jw2XMli",
"priority" : "high",
"content_available" : true
}
I don't see anything wrong, I tried different versions of Android, thinking android version could be any reason, but didn't seem the find any problem. Any ideas? Thank you.
Check if message contains a notification payload.
if (remoteMessage.getNotification() != null) {
Log.e(TAG, "Notification Payload: " + remoteMessage.getNotification().getBody());
//handleNotification(remoteMessage.getNotification().getBody());
}
Check if message contains a data payload.
if (remoteMessage.getData().size() > 0){
Log.e(TAG, "Data Payload: " + remoteMessage.getData().toString());
handleNotification(remoteMessage.getData());
}
As per FCM document
Notification messages contain a predefined set of user-visible keys.
Data messages, by contrast, contain only your user-defined custom
key-value pairs. Notification messages can contain an optional data
payload. Maximum payload for both message types is 4KB, except when
sending messages from the Firebase console, which enforces a 1024
character limit.
check that your message size is within limit.
In fact onMessageReceived is being called the whole time, it is just that Logcat didn't show any messages, weird enough it happened only with devices of API 19 above, on a device with API 19 Logcat is showing the messages, I can't explain why this happened but my problem was solved.
The full method signature is...
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: #escaping (UIBackgroundFetchResult) -> Void)
What I want to be able to do is have the device respond when a push notification arrives. For example, the app might automatically navigate to a particular screen to show some data that's identified in the notification.
Android Equivalent Method is public void onMessageReceived(RemoteMessage remoteMessage)
#Override
public void onMessageReceived(RemoteMessage remoteMessage) {
// ...
// TODO(developer): Handle FCM messages here.
Log.d(TAG, "From: " + remoteMessage.getFrom());
// Check if message contains a data payload.
if (remoteMessage.getData().size() > 0) {
Log.d(TAG, "Message data payload: " + remoteMessage.getData());
if (/* Check if data needs to be processed by long running job */ true) {
// For long-running tasks (10 seconds or more) use Firebase Job Dispatcher.
scheduleJob();
} else {
// Handle message within 10 seconds
handleNow();
}
}
// Check if message contains a notification payload.
if (remoteMessage.getNotification() != null) {
Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
}
// 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.
}
For reference see 1 2
PackageManager.getLaunchIntentForPackage is what you're looking for.
This is how you'd use it :-
Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage(context.getPackageName());
launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(launchIntent);
On push message receive i want to start an activity / app itself on onMessageReceived (FCM) when the App is not running. How to start activity when onMessageReceived fired. Any help will be appreciated
You should send data payload in your FCM message. Data payload gets received in on message method irrespective of your app being in foreground or background. Handle the action there. Like show notification by reading the data payload always, or if you want show an alert dialog when your app is open or in the foreground.
here is a sample payload:
{
"to": "registration_id_or_topic",
"data": {
"message": "This is a Firebase Cloud Messaging Topic Message!",
"youtubeURL": "https://youtu.be/A1SDBIViRtE"
}
}
Then in your onMessageReceived:
public void onMessageReceived(RemoteMessage remoteMessage) {
if (remoteMessage.getData().size() > 0) {
Log.d(TAG, "Message data payload: " + remoteMessage.getData());
//Create or Start Your New Activity.
}
}
As instructed in Firebase dev docs, I've implemented a Service that extends FirebaseMessagingService and overrides the onMessageReceived callback. I have put a Log message in the first line inside the onMessageReceived method.
App running in background
I don't see the log in logcat but I see a Notification posted in the system try.
App in Foreground
I neither see the log nor the notification in system tray
Any idea what's going on?
Manifest
<service
android:name=".fcm.MovieMessagingService">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT"/>
</intent-filter>
</service>
Service Class
public class MovieMessagingService extends FirebaseMessagingService {
private static final String LOG_TAG = MovieMessagingService.class.getSimpleName();
#Override
public void onMessageReceived(RemoteMessage remoteMessage) {
Log.d(LOG_TAG, "From: " + remoteMessage.getFrom());
}
/**
* Create and show a simple notification containing the received FCM message.
*
* #param messageBody FCM message body received.
*/
private void sendNotification(String messageBody) {
Log.d(LOG_TAG, "Presenting Notification with message body: " + messageBody);
//more code
}
}
Actually, app's behavior, while receiving messages including both notification and data payloads, depends on whether the app is in the background or the foreground like:
When in the background, apps receive the notification payload in the notification tray, and only handle the data payload when the user taps on the notification.
When in the foreground, your app receives a message object with both payloads attached.
So, The summary is when app is in background, you can see the notification in system tray and can't see any log until tapping on the notification but you will see only the opening activity log not the service log as it's already executed.
And when the app in foreground you can see the log in logcat but you can't see any notification in the system tray as your app already open state you will receive only data payloads.
Here is a code example of how to receive messages and how to handle the different types. Here is the source of the code.
public class MyFirebaseMessagingService extends FirebaseMessagingService {
private static final String 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]
Log.d(TAG, "From: " + remoteMessage.getFrom());
// Check if message contains a data payload.
if (remoteMessage.getData().size() > 0) {
Log.d(TAG, "Message data payload: " + remoteMessage.getData());
}
// Check if message contains a notification payload.
if (remoteMessage.getNotification() != null) {
Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
}
}