问题原因

Unity应用(target SDK 34)上线到GooglePlay，有用户反馈fold5设备上（Android14系统）疯狂闪退，经测试，在小米手机Android14系统的版本复现成功了，奇怪的是apk直接安装没问题，而打包成aab就是疯狂闪退。

Unity版本Unity2020.3.18f1c1。

老办法，logcat抓包，看看闪退日志。

日志有一行引起了我的注意，也就是在闪退前的报错：

No pending exception expected: java.lang.SecurityException: com.xxx.xxx: One of RECEIVER_EXPORTED or RECEIVER_NOT_EXPORTED should be specified when a receiver isn't being registered exclusively for system broadcasts

既然有错误，就好解决了，现在问ChatGPT没用的，因为ChatGPT经常会瞎编，所以上谷歌搜索下，立马就搜到了。 android - One of RECEIVER_EXPORTED or RECEIVER_NOT_EXPORTED should be specified when a receiver isn't being registered exclusively for system broadcasts - Stack Overflow

 As discussed at Google I/O 2023, registering receivers with intention using the RECEIVER_EXPORTED / RECEIVER_NOT_EXPORTED flag was introduced as part of Android 13 and is now a requirement for apps running on Android 14 or higher (U+).

If you do not implement this, the system will throw a security exception.

To allow the broadcast receiver to receive broadcasts from other apps, register the receiver using the following code:

context.registerReceiver(broadcastReceiver, intentFilter, RECEIVER_EXPORTED);

To register a broadcast receiver that does not receive broadcasts from other apps, including system apps, register the receiver using the following code:

context.registerReceiver(broadcastReceiver, intentFilter, RECEIVER_NOT_EXPORTED);

Note: That call will need minSdkVersion to be 26 (Android 8) al least

Check https://www.delasign.com/blog/android-studio-kotlin-broadcast-recievers-export-or-not/#:~:text=As%20discussed%20at%20Google%20I,will%20throw%20a%20security%20exception.

翻译过来就是，Goole I/O 2023讨论的，使用RECEIVER_EXPORTED / RECEIVER_NOT_EXPORTED标志注册接收者是Android 13的一部分，现在是运行在Android 14或更高版本(U+)上的应用程序的要求。也就是Android14必须增加该标志。

以前使用registerReceiver不需要设置RECEIVER_EXPORTED / RECEIVER_NOT_EXPORTED这个Flag，现在Android14开始需要设置了，所以抛异常，闪退了。

解决思路

问题找到了，也分析好了，但是因为这是Unity工程直接打包出来的aab，像是一个黑箱，而问题就是Unity打包出来写的registerReceiver没有按照Android14的要求传进去Flag，这个我们可以通过日志确定，可以看到堆栈日志显示com.unity3d.player.PlayAssetDeliveryUnityWrapper.registerDownloadStatusListener这个类注册的Receiver，而这个是Unity的类，无法修改。

2024-01-12 17:45:50.379 6394-6494/? A/ongame.isoland4: thread.cc:2529] No pending exception expected: java.lang.SecurityException: com.cottongame.isoland4: One of RECEIVER_EXPORTED or RECEIVER_NOT_EXPORTED should be specified when a receiver isn't being registered exclusively for system broadcasts
    thread.cc:2529]   at java.lang.Exception android.os.Parcel.createExceptionOrNull(int, java.lang.String) (Parcel.java:3057)
    thread.cc:2529]   at java.lang.Exception android.os.Parcel.createException(int, java.lang.String) (Parcel.java:3041)
    thread.cc:2529]   at void android.os.Parcel.readException(int, java.lang.String) (Parcel.java:3024)
    thread.cc:2529]   at void android.os.Parcel.readException() (Parcel.java:2966)
    thread.cc:2529]   at android.content.Intent android.app.IActivityManager$Stub$Proxy.registerReceiverWithFeature(android.app.IApplicationThread, java.lang.String, java.lang.String, java.lang.String, android.content.IIntentReceiver, android.content.IntentFilter, java.lang.String, int, int) (IActivityManager.java:6193)
    thread.cc:2529]   at android.content.Intent android.app.ContextImpl.registerReceiverInternal(android.content.BroadcastReceiver, int, android.content.IntentFilter, java.lang.String, android.os.Handler, android.content.Context, int) (ContextImpl.java:1863)
    thread.cc:2529]   at android.content.Intent android.app.ContextImpl.registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter, java.lang.String, android.os.Handler) (ContextImpl.java:1803)
    thread.cc:2529]   at android.content.Intent android.app.ContextImpl.registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter) (ContextImpl.java:1791)
    thread.cc:2529]   at android.content.Intent android.content.ContextWrapper.registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter) (ContextWrapper.java:766)
    thread.cc:2529]   at void com.google.android.play.core.listener.b.b() ((null):-1)
    thread.cc:2529]   at void com.google.android.play.core.listener.b.f(com.google.android.play.core.listener.StateUpdatedListener) ((null):-1)
    thread.cc:2529]   at void com.google.android.play.core.assetpacks.i.registerListener(com.google.android.play.core.assetpacks.AssetPackStateUpdateListener) ((null):-1)
    thread.cc:2529]   at java.lang.Object com.unity3d.player.a.a(com.unity3d.player.IAssetPackManagerDownloadStatusCallback) ((null):-1)
    thread.cc:2529]   at java.lang.Object com.unity3d.player.PlayAssetDeliveryUnityWrapper.registerDownloadStatusListener(com.unity3d.player.IAssetPackManagerDownloadStatusCallback) ((null):-1)
    thread.cc:2529]   at boolean com.unity3d.player.UnityPlayer.nativeRender() ((null):-2)
    thread.cc:2529]   at boolean com.unity3d.player.UnityPlayer.access$300(com.unity3d.player.UnityPlayer) ((null):-1)
    thread.cc:2529]   at boolean com.unity3d.player.UnityPlayer$e$1.handleMessage(android.os.Message) ((null):-1)
    thread.cc:2529]   at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:102)
    thread.cc:2529]   at boolean android.os.Looper.loopOnce(android.os.Looper, long, int) (Looper.java:224)
    thread.cc:2529]   at void android.os.Looper.loop() (Looper.java:318)
    thread.cc:2529]   at void com.unity3d.player.UnityPlayer$e.run() ((null):-1)
    thread.cc:2529] 

解决

目前解决方案是targetsdk改成33，经测试就不闪退了。

如果你需要targetsdk为34，得升级下Unity版本，看看哪个版本修复了这个问题。我们的版本是Unity2020.3.18f1c1。查了3.19的Release Note没有找到相关的修复，懒得找了。