After killing the app, when the push notification is received, the app crashes.

[PacteraZhangTong]

After killing the app, when the push notification is received, the app crashes.

build.gradle： api 'com.ibm.mobilefirstplatform.clientsdk.android:core:3.1.7' api (group: 'com.ibm.mobilefirstplatform.clientsdk.android', name: 'push', version: '4.2.1', ext: 'aar', transitive: false){ exclude group: 'com.google.code.gson', module: 'gson' }

Log: java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/core/app/NotificationCompat$Builder; at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.generateNotification(MFPPushIntentService.java:304) at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.onUnhandled(MFPPushIntentService.java:235) at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.onNotificationReceived(MFPPushIntentService.java:198) at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.onMessageReceived(MFPPushIntentService.java:137) at com.google.firebase.messaging.FirebaseMessagingService.zzd(Unknown Source) at com.google.firebase.iid.zzc.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) at com.google.android.gms.common.util.concurrent.zza.run(Unknown Source) at java.lang.Thread.run(Thread.java:818) Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.core.app.NotificationCompat$Builder" on path: DexPathList[[zip file "/data/app/jp.co.hiroshimabank.securestarter.stg-1/base.apk"],nativeLibraryDirectories=[/data/app/jp.co.hiroshimabank.securestarter.stg-1/lib/arm64, /data/app/jp.co.hiroshimabank.securestarter.stg-1/base.apk!/lib/arm64-v8a, /vendor/lib64, /system/lib64]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) at java.lang.ClassLoader.loadClass(ClassLoader.java:511) at java.lang.ClassLoader.loadClass(ClassLoader.java:469) at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.generateNotification(MFPPushIntentService.java:304) at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.onUnhandled(MFPPushIntentService.java:235) at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.onNotificationReceived(MFPPushIntentService.java:198) at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.onMessageReceived(MFPPushIntentService.java:137) at com.google.firebase.messaging.FirebaseMessagingService.zzd(Unknown Source) at com.google.firebase.iid.zzc.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) at com.google.android.gms.common.util.concurrent.zza.run(Unknown Source) at java.lang.Thread.run(Thread.java:818) Suppressed: java.lang.ClassNotFoundException: androidx.core.app.NotificationCompat$Builder at java.lang.Class.classForName(Native Method) at java.lang.BootClassLoader.findClass(ClassLoader.java:781) at java.lang.BootClassLoader.loadClass(ClassLoader.java:841) at java.lang.ClassLoader.loadClass(ClassLoader.java:504)

The log says: Failed resolution of: Landroidx / core / app / NotificationCompat $ Builder

How can i solve this problem？

[AnanthaKrish]

@PacteraZhangTong What is the device android version ?

[PacteraZhangTong]

@AnanthaKrish I've used Android 8.0 and 9.0, which all have this problem

[AnanthaKrish]

@PacteraZhangTong What is the build version in your gradle ? Please use 26 or above.

[PacteraZhangTong]

@AnanthaKrish I've used compileSdkVersion 28

build.gradle： compileSdkVersion 28 defaultConfig { minSdkVersion 23 targetSdkVersion 28 }

[AnanthaKrish]

@PacteraZhangTong The failure is when a data notification comes, then push SDK try to build a notification from that . Check this line 284. From API 26 the NotificationCompat.Builder(context) is deprecated , so we have to check that condition . Somehow in your app the condition showing its below 26 , and goes to the line number 304, and it cannot find it.

I think this can be fixed from build.gradle. Please check your appcompat version as well.

I have tested the app with this

    implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'
    implementation 'com.google.firebase:firebase-messaging:20.0.0'

and

     classpath 'com.android.tools.build:gradle:3.5.2'
     classpath 'com.google.gms:google-services:4.3.3'

[PacteraZhangTong]

Sorry, I just made a mistake. The error log above is Android 6 Device printed, using Android9.0 The following exception was thrown:

java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/core/app/NotificationCompat$Builder; at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.generateNotification(MFPPushIntentService.java:299) at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.onUnhandled(MFPPushIntentService.java:235) at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.onNotificationReceived(MFPPushIntentService.java:198) at com.ibm.mobilefirstplatform.clientsdk.android.push.api.MFPPushIntentService.onMessageReceived(MFPPushIntentService.java:137) at com.google.firebase.messaging.FirebaseMessagingService.zzd(Unknown Source:60) at com.google.firebase.iid.zzg.run(Unknown Source:4) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) at com.google.android.gms.common.util.concurrent.zza.run(Unknown Source:6) at java.lang.Thread.run(Thread.java:764)

Is this problem related to Androidx?

[AnanthaKrish]

@PacteraZhangTong Looks like it is.

[PacteraZhangTong]

My project has not been upgraded to AndroidX, I will upgrade it to Androidx later,and try to solve this problem。

[AnanthaKrish]

@PacteraZhangTong Sure. Please let us know.

[PacteraZhangTong]

Thank you very much for your answer. After I upgraded the project to Android x, this problem has been solved