java.lang.NoClassDefFoundError: com.pusher.client.Pusher$$ExternalSyntheticLambda0 on Android API 21-22 anyway

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@Keith-wright 已经在做这个了。

开始于 2026年10月21日。

  • #381 来自 @Keith-wright —— 未关闭

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Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
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技术栈
android, java
领域
mobile

调研方向

The crash is a NoClassDefFoundError for a synthetic lambda, raised in the Pusher constructor at Pusher.java lines 85 and 103. Start by reading those lines to see which lambda the constructor creates, then check how the library's build handles Java 8 desugaring. Done means the constructor runs on Android API 21-22 with the desugared build, ideally shown by a reproduction on an emulator of that API level.

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描述

What is the issue?

My application with Pusher version 2.4.# crashes on Pusher's initialization on Android API 21-22.
I did like described here, but it doesn't change anything with it.

AGP version 7.4.2
coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.0.4")

implementation "com.pusher:pusher-java-client:2.4.4"

Project's compile, target SDK 33
Min SDK 21

Is it a crash report? Submit stack traces or anything that you think would help
 java.lang.NoClassDefFoundError: com.pusher.client.Pusher$$ExternalSyntheticLambda0
        at com.pusher.client.Pusher.<init>(Pusher.java:103)
        at com.pusher.client.Pusher.<init>(Pusher.java:85)
        at myapp.features.chat.data.PusherWebSocket.<init>(PusherWebSocket.java:122)
        at myapp.data.chat.NewWebSocketChatRepositoryImpl.<init>(NewWebSocketChatRepositoryImpl.kt:29)
        at myapp.presentation.chat.ConsultantChatMessagesRepositoryFactory.create(ConsultantHelper.kt:62)
        at myapp.presentation.chat.ConsultantFragment.createChatViewModel(ConsultantFragment.java:51)
        at myapp.presentation.chat.ChatFragment.onCreateView(ChatFragment.java:80)
        at androidx.fragment.app.Fragment.performCreateView(Fragment.java:3104)
        at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:524)
        at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:261)
        at androidx.fragment.app.FragmentStore.moveToExpectedState(FragmentStore.java:113)
        at androidx.fragment.app.FragmentManager.moveToState(FragmentManager.java:1433)
        at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:2977)
        at androidx.fragment.app.FragmentManager.dispatchViewCreated(FragmentManager.java:2888)
        at androidx.fragment.app.Fragment.performViewCreated(Fragment.java:3129)
        at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:552)
        at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:261)
        at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1899)
        at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1823)
        at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1760)
        at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:547)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5221)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

It works with Pusher version 2.2.8.

CC @pusher/mobile

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