Ionic4 and capacitor FCM push notification issue in android

[rajlee5129]

Description of the problem: I am developing ionic4 app and I integrated push notification in my app using the following link. I just copy and paste the following link code in my ionic4 app. I am getting a notification if I send notifications from firebase develop console and using "fcm-node" npm module when the app is open or minimized. but if I close or kill the app. I am not receiving any notification. But no issue in ios app, getting notifications even if I kill the ios app. I integrated push notification from the following link. https://capacitor.ionicframework.com/docs/guides/push-notifications-firebase/

Affected platform

• [x] Android

OS of the development machine

• [x] Windows

[digaus]

@rajlee5129

What payload do you send and what do you mean by not getting a notification? Do you not receive the event in the application or does the notification not get displayed?

[rajlee5129]

not receiving event and data in the application. I tried almost all payloads given by stack overflow, ionic forum, etc. I am using the following payload { "notification": { "title": "Notification title", "body": "Notification body", "sound": "default", "icon": "fcm_push_icon" }, "data": { "title": "actual data title", "body": "actual data body" }, "to": token, "priority": "high" };

[digaus]

@rajlee5129 When the app is force closed in android or ios (killed and not just moved to background) then you will only receive the event when you click on the notification.

What do you want to do with the payload that you need it directly and not when user clicks on it?

[rajlee5129]

@digaus Like WhatsApp, if I force close the WhatsApp and if anyone sends the message I will get push notification even if force kills the WhatsApp. I need the same behavior in my app.

[digaus]

@digaus Like WhatsApp, if I force close the WhatsApp and if anyone sends the message I will get push notification even if force kills the WhatsApp. I need the same behavior in my app.

not receiving event and data in the application.

I asked you if the notification is not shown or if you do not receive the notification event and you told the later. If you have a title and body, the notification will get displayed on android even if the app is killed.

What you want to do (my guess) is modifying the notification before it gets displayed. Is that correct`?

[rajlee5129]

No sir, I don't want to modify the notification before it gets displayed. I have title and body but notification not receiving on android if the app is killed. if the app is minimized(background), I am getting the notification and receiving the notification event.

[digaus]

No sir, I don't want to modify the notification before it gets displayed. I have title and body but notification not receiving on android if the app is killed. if the app is minimized(background), I am getting the notification and receiving the notification event.

OK this is something I cannot reproduce on my device. Works correctly here. Notification is displayed on top with Title and body and when I click on it, the app opens and I receive notification event

[rajlee5129]

Did you use the capacitor push notification, which I provided in the issue(push notification capacitor link) https://capacitor.ionicframework.com/docs/guides/push-notifications-firebase/

[rajlee5129]

or did you used the Cordova plugin?

[digaus]

I am also using the capacitor plugin. But I use it combined with the capacitor-fcm plugin but that should not be an issue. Which android version do you have ?

[rajlee5129]

I tested in android M mobiles and nougat mobiles. in build.gradle: minSdkVersion 21 targetSdkVersion 28

[digaus]

@rajlee5129

Could you test android >= 8? Have it running on Android 9 without any issues.

Also check app settings in app manager and make sure that you have everything allow regarding battery optimization or background running.

What device brand are you trying to send notifications to? Huawei, Samsung?

[rajlee5129]

I am using one plus and oppo

[digaus]

@rajlee5129

Could you test in emulator with android 8/9

Edit: maybe try this -> https://www.google.com/amp/s/www.forbes.com/sites/bensin/2017/07/28/how-to-fix-push-notifications-on-oppo-phones/amp/

[rajlee5129]

Ok. i will test.

[rajlee5129]

It is working only on the android pie.

[digaus]

It is working only on the android pie.

Did you try this: https://www.google.com/amp/s/www.forbes.com/sites/bensin/2017/07/28/how-to-fix-push-notifications-on-oppo-phones/amp/ ?

Also did you test in emulator with android 6/7/8 ?

using "fcm-node" npm module when the app is open or minimized

What do you mean with that?

Also might try send push with only notification part.

[digaus]

I did test it on Android 8.1 in the emulator without any issues.

[rajlee5129]

I tried the link which you have provided, still the same issue. I tried in mobiles 6,7 and 8. I changed the battery optimized setting for my app as suggested in the link. but not receiving the notification and event if I killed or closed the app.

[rajlee5129]

I didn't test in emulators, because finally, it should work in mobiles. that's why I tested mobile(6,7 and 8) but it working only in android 9.

[jcesarmobile]

When you send the notifications with notification payload (or when you send them from firebase console), if the app is backgrounded or closed, those notifications will be handled by the OS, not by the plugin. Some vendors like Oppo and Xiaomi seem to not handle them well in some cases. There is a similar link that cover some more vendors https://help.batch.com/en/articles/2246074-how-can-i-fix-a-notification-issue-on-my-honor-huawei-sony-oppo, but sadly your users will have to do that.

What you can try is to send data only pushes, those should be handled by the app. But data pushes are not displayed, you should use LocalNotification plugin or some other plugin if you want to display something to the user.

[digaus]

@rajlee5129

You could try use https://github.com/digaus/capacitor-background-fcm

Just send data payload only and implement BackgroundFCMHandler in your android project.

It will display local notification if you do it correctly. That way you can modify notification based on data available in the app (like language or other info). iOS is currently not implement yet though

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