问题
I am using react-native-firebase@4.2.0 for push notifications.
When app is open on screen, I receive the notification via onNotification and an alert as intended by my code.
PROBLEM 1 When app is in background (not killed), I receive the notification in status bar but on tapping it, it just gets dismissed and app is not opened.
I also get this error in android logcat:
06-21 17:26:03.892 5926 8672 D RNFMessagingService: onMessageReceived event received
06-21 17:26:03.913 5926 8600 E ReactNativeJS: No task registered for key RNFirebaseBackgroundMessage
--------- beginning of crash
06-21 17:26:03.932 5926 8601 E AndroidRuntime: FATAL EXCEPTION: mqt_native_modules
06-21 17:26:03.932 5926 8601 E AndroidRuntime: Process: com.mycustomapp, PID: 5926
06-21 17:26:03.932 5926 8601 E AndroidRuntime: com.facebook.react.common.JavascriptException: No task registered for key RNFirebaseBackgroundMessage, stack:
06-21 17:26:03.932 5926 8601 E AndroidRuntime: startHeadlessTask@57242:24
06-21 17:26:03.932 5926 8601 E AndroidRuntime: __callFunction@4106:49
06-21 17:26:03.932 5926 8601 E AndroidRuntime: <unknown>@3876:31
06-21 17:26:03.932 5926 8601 E AndroidRuntime: __guardSafe@4068:13
06-21 17:26:03.932 5926 8601 E AndroidRuntime: callFunctionReturnFlushedQueue@3875:21
06-21 17:26:03.932 5926 8601 E AndroidRuntime:
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at com.facebook.react.modules.core.ExceptionsManagerModule.showOrThrowError(ExceptionsManagerModule.java:56)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at com.facebook.react.modules.core.ExceptionsManagerModule.reportFatalException(ExceptionsManagerModule.java:40)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at com.facebook.react.bridge.JavaMethodWrapper.invoke(JavaMethodWrapper.java:374)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at com.facebook.react.bridge.JavaModuleWrapper.invoke(JavaModuleWrapper.java:162)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at com.facebook.react.bridge.queue.NativeRunnable.run(Native Method)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:790)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:99)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:31)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at android.os.Looper.loop(Looper.java:164)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at com.facebook.react.bridge.queue.MessageQueueThreadImpl$3.run(MessageQueueThreadImpl.java:194)
06-21 17:26:03.932 5926 8601 E AndroidRuntime: at java.lang.Thread.run(Thread.java:764)
06-21 17:26:03.938 590 590 E SELinux : avc: denied { find } for service=opdiagnose pid=5926 uid=10238 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:opdiagnose_service:s0 tclass=service_manager permissive=0
06-21 17:26:03.939 590 590 E SELinux : avc: denied { find } for service=opdiagnose pid=5926 uid=10238 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:opdiagnose_service:s0 tclass=service_manager permissive=0
06-21 17:26:03.939 5926 8601 W OPDiagnose: getService:OPDiagnoseService NULL
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: Error while parsing timestamp in GCM event
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: java.lang.NumberFormatException: s == null
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: at java.lang.Integer.parseInt(Integer.java:570)
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: at java.lang.Integer.parseInt(Integer.java:643)
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: at com.google.firebase.messaging.zzb.zzb(Unknown Source:81)
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: at com.google.firebase.messaging.zzb.zzc(Unknown Source:2)
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: at com.google.firebase.messaging.FirebaseMessagingService.zzd(Unknown Source:353)
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: at com.google.firebase.iid.zzg.run(Unknown Source:26)
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: at com.google.android.gms.common.util.concurrent.zza.run(Unknown Source:7)
06-21 17:26:03.946 5926 8672 W FirebaseMessaging: at java.lang.Thread.run(Thread.java:764)
PROBLEM 2 When app is killed or not started, I receive this in my android logcat:
W GCM : broadcast intent callback: result=CANCELLED forIntent { act=com.google.android.c2dm.intent.RECEIVE flg=0x10000000 pkg=com.mycustomapp (has extras) }
and that's it. No push notification in status bar or anything.
These are the services added in my AndroidManifest.xml:
<service android:name="io.invertase.firebase.messaging.RNFirebaseMessagingService">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
<service android:name="io.invertase.firebase.messaging.RNFirebaseInstanceIdService">
<intent-filter>
<action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
</intent-filter>
</service>
<service android:name="io.invertase.firebase.messaging.RNFirebaseBackgroundMessagingService" />
functions invoked when the app starts:
firebase.messaging().hasPermission()
.then(enabled => {
if (enabled) {
// permissions granted
} else {
// permissions not granted
}
});
firebase.messaging().getToken()
.then(fcmToken => {
if (fcmToken) {
// user has a device token
console.log(fcmToken);
} else {
// user doesn't have a device token yet
}
});
firebase.notifications().getInitialNotification()
.then((notificationOpen: NotificationOpen) => {
if (notificationOpen) {
// App was opened by a notification
// Get the action triggered by the notification being opened
// Get information about the notification that was opened
}
});
this.onTokenRefreshListener = firebase.messaging().onTokenRefresh(fcmToken => {
// Process your token as required
console.log(fcmToken);
});
this.notificationDisplayedListener = firebase.notifications().onNotificationDisplayed((notification: Notification) => {
// Process your notification as required
// ANDROID: Remote notifications do not contain the channel ID. You will have to specify this manually if you'd like to re-display the notification.
console.log("onNotificationDisplayed", notification);
});
this.notificationListener = firebase.notifications().onNotification((notification: Notification) => {
// Process your notification as required
Alert.alert(
notification.title,
notification.body,
[
{text: 'OK', onPress: () => console.log('OK Pressed')},
],
{ cancelable: true }
)
});
this.notificationOpenedListener = firebase.notifications().onNotificationOpened((notificationOpen: NotificationOpen) => {
// Get the action triggered by the notification being opened
const action = notificationOpen.action;
// Get information about the notification that was opened
const notification: Notification = notificationOpen.notification;
console.log("onNotificationOpened", notification);
});
this.messageListener = firebase.messaging().onMessage((message: RemoteMessage) => {
// Process your message as required
console.log("onMessage", message);
});
And this is my bgMessaging.js:
import { AppRegistry } from 'react-native';
import firebase from 'react-native-firebase';
// Optional flow type
import type { RemoteMessage } from 'react-native-firebase';
export default async (message: RemoteMessage) => {
// handle your message
console.log("RemoteMessage", message);
return Promise.resolve();
}
AppRegistry.registerHeadlessTask('AppBackgroundMessage', () => bgMessaging);
If it is relevant at all, I use react-native-navigation. If you need any other information, please comment.
回答1:
The headless task must be registered as RNFirebaseBackgroundMessage.
Change your code:
AppRegistry.registerHeadlessTask('AppBackgroundMessage', () => bgMessaging);
To
AppRegistry.registerHeadlessTask('RNFirebaseBackgroundMessage', () => bgMessaging);
I hope you have already completed this 4 steps to list for FCM messages in the background.
回答2:
To Show the notifications in the background also when the App listens to the notification from the firebase you have to create the local notification to display.
I will suggest to use the react-native-fcm library it is very easy to use https://www.npmjs.com/package/react-native-fcm
回答3:
Following article can give some reasons if everything is configured correctly.
Why your Push Notifications never see the light of day
来源：https://stackoverflow.com/questions/50969267/react-native-not-receiving-notification-when-app-is-killed-not-started