React-native-notifications: Method invocation 'onPostRequest' may produce 'java.lang.NullPointerException'

[suswari]

Hi,
I am trying to get a local notification on Android and I see the below error when I run the device:

D/ReactNativeNotifs: Native method invocation: postLocalNotification
E/unknown:ReactNative: Exception in native call
java.lang.NullPointerException: Attempt to invoke interface method 'int com.wix.reactnativenotifications.core.notification.IPushNotification.onPostRequest(java.lang.Integer)' on a null object reference
at com.wix.reactnativenotifications.RNNotificationsModule.postLocalNotification(RNNotificationsModule.java:102)
at java.lang.reflect.Method.invoke(Native Method)
at com.facebook.react.bridge.JavaMethodWrapper.invoke(JavaMethodWrapper.java:372)
at com.facebook.react.bridge.JavaModuleWrapper.invoke(JavaModuleWrapper.java:160)
at com.facebook.react.bridge.queue.NativeRunnable.run(Native Method)
at android.os.Handler.handleCallback(Handler.java:751)
.
.
Any idea, what could have been wrong?

notificationservice.js:

/*

*/
import {NotificationsAndroid} from 'react-native-notifications';

const postNotification = () => {
let localNotification = NotificationsAndroid.localNotification({
body: "My first notification",
title: "test title",
});
};

module.exports = postNotification;

[ywongweb]

Same problem here
"react-native-notifications": "1.2.52",

edit:
I think I found the cause. In the lib's PushNotification.java, the verifyNotificationBundle check is looking for a google.message_id key that doesn't seem to exist in a local notification. If you change the method to always returns true, the local notification will work.

    private static boolean verifyNotificationBundle(Bundle bundle) {
        if (bundle.getString("google.message_id") != null) {
            return true;
        }

        return false;
    }

Not sure why we are checking for a google message ID for local notification, maybe @yogevbd can shed some light on this. Or did we missed a setup step?

[nickelbob]

Any news on this? I'm also experiencing it. Thanks!

[bradser]

I worked around it by passing in an empty string for the 'google.message_id' value when calling localNotification(). I didn't try running instead against https://github.com/wix/react-native-notifications/pull/71, but I would hope that would resolve the issue.

[sstano]

I worked around it by passing in an empty string for the 'google.message_id' value when calling localNotification(). I didn't try running instead against #71, but I would hope that would resolve the issue.

Great, thanks! Works for me!

NotificationsAndroid.localNotification({
    "title": "Local notification",
    "body": "This notification was generated by the app!",
    "extra": "data",
    "google.message_id": "" // <-- Adding this line fixed the problem
});

[wlaurance]

Add the google.message_id worked for me as well. 🤷‍♂

[MewX]

Has anyone tried iOS yet? Is this on iOS as well?