Android 12L - AbstractMethodError calling onSpatializerAvailableChanged

[asos-edgeorge]

ExoPlayer Version

2.18.0

Devices that reproduce the issue

All devices that have this issue are Samsung devices within the Galaxy Z Fold/Flip series, running Android 12 (presumably 12L)

For example, the three most popular devices experiencing this issue are:

• Galaxy Z Flip3 5G
• Galaxy Z Flip4
• Galaxy Z Fold3 5G

Devices that do not reproduce the issue

Non-Galaxy Z Flip/Fold series devices

Reproducible in the demo app?

Not tested

Reproduction steps

We have seen this issue in the wild and unfortunately do not have access to the affected devices to find steps to reproduce this crash.

Based on the crash reports received, it seems 86% of crashes occur when the app is in the background. Due to the nature of foldable devices, this could be perhaps linked to a form config change (i.e. folding/unfolding) or something similar.

Should it help, our player is defined as follows (with some minor code omitted)

// Cache
val cache = SimpleCache(createVideoCacheDir(context),
                LeastRecentlyUsedCacheEvictor(VIDEO_CACHE_SIZE.toLong()),
                ExoDatabaseProvider(context))

// CacheDataSource
val upstreamFactory: DataSource.Factory = OkHttpDataSourceFactory({ request -> okHttp.newCall(request) }, USER_AGENT)
val cacheDataSource = CacheDataSource.Factory()
                .setCache(exoCache)
                .setUpstreamDataSourceFactory(upstreamFactory)
                .setFlags(CacheDataSource.FLAG_IGNORE_CACHE_ON_ERROR)

// ExoPlayer
ExoPlayer.Builder(context)
                .setLooper(Looper.getMainLooper())
                .setMediaSourceFactory(DefaultMediaSourceFactory(cacheDataSource))
                .setTrackSelector(DefaultTrackSelector(context, AdaptiveTrackSelection.Factory()))
                .build()

Expected result

The media plays successfully and backgrounding the app works as expected

Actual result

Exoplayer crashes with the following stacktrace

Fatal Exception: java.lang.AbstractMethodError: abstract method "void android.media.Spatializer$OnSpatializerStateChangedListener.onSpatializerAvailableChanged(android.media.Spatializer, boolean)"
       at android.media.Spatializer$SpatializerInfoDispatcherStub.lambda$dispatchSpatializerAvailableChanged$1$Spatializer$SpatializerInfoDispatcherStub(Spatializer.java:529)
       at android.media.Spatializer$SpatializerInfoDispatcherStub$$ExternalSyntheticLambda0.run(Spatializer.java:6)
       at android.os.Handler.handleCallback(Handler.java:938)
       at android.os.Handler.dispatchMessage(Handler.java:99)
       at android.os.Looper.loopOnce(Looper.java:226)
       at android.os.Looper.loop(Looper.java:313)
       at android.os.HandlerThread.run(HandlerThread.java:67)

Media

Not applicable

Bug Report

• You will email the zip file produced by adb bugreport to dev.exoplayer@gmail.com after filing this issue.

[christosts]

Thank you for reporting the issue, we will investigate. I'd like to ask some additional information. You mention this occurs only on "Galaxy Z Fold/Flip series, running Android 12 (presumably 12L)". Just to confirm, do you have data if your app is running on other devices with Android 12L/13? For example, Pixel devices have started receiving Android 13. Any errors there?

[added]
To avoid the error, you can force ExoPlayer to stop listening to Spatializer changes. On your custom DefaultTrackSelector, you need to set DefaultTrackSelector.Parameters where constrainAudioChannelCountToDeviceCapabilities is disabled. Something like (in java)

DefaultTrackSelector trackSelector = ...
trackSelector.setParameters(
  trackSelector.buildUponParameters().setConstrainAudioChannelCountToDeviceCapabilities(false).build());

That will affect the audio track selection logic and will make the player always play the playable audio track with the highest channel count (which was the behavior before version 2.18). This would affect your app if it is streaming different audio formats (eg stereo and surround formats) and you were relying on ExoPlayer to pick-up stereo or surround audio depending on the Spatializer properties.

[christosts]

[internal ref b/252738423]

[asos-edgeorge]

Thanks @christosts for your response

Just to confirm, do you have data if your app is running on other devices with Android 12L/13? For example, Pixel devices have started receiving Android 13. Any errors there?

Based on our crash reports, we are not seeing this for any other device family or Android version. We support all devices running Android 5.0+, so based on that it's a reasonable assumption to say it doesn't look to affect anything else at this time. 

However, should we see any additional devices or OS' in the report, I will update this ticket. 

Going forwards, we will follow the approach you suggest and monitor the results in our crash reports. We should have results to feedback to you in ~2 weeks.

If there's anything else you need from me to help diagnosis, please do let me know here or reach out via email

[punxoi]

I'm facing the same issue.
See additional information below.
Thanks.

ExoPlayer Version

2.18.1

Devices that reproduce the issue

100%Android 12
100% samsung

• 58% Galaxy Z Flip3 5G
• 24% Galaxy Z Flip4
• 5% Galaxy Z Fold4
• 5% Galaxy Z Fold3 5G
• 3% Galaxy Z Flip
• 2% Galaxy Z Flip 5G
• 2% Galaxy Z Fold2 5G
• <1% Galaxy Fold 5G
• <1% Galaxy Tab S7
• <1% Galaxy Tab S6 Lite
• <1% Galaxy Z Flip3 5G

Stacktrace

Fatal Exception: java.lang.AbstractMethodError: abstract method "void android.media.Spatializer$OnSpatializerStateChangedListener.onSpatializerAvailableChanged(android.media.Spatializer, boolean)"
       at android.media.Spatializer$SpatializerInfoDispatcherStub.lambda$dispatchSpatializerAvailableChanged$1$Spatializer$SpatializerInfoDispatcherStub(Spatializer.java:529)
       at android.media.Spatializer$SpatializerInfoDispatcherStub$$ExternalSyntheticLambda0.run(Spatializer.java:6)
       at android.os.Handler.handleCallback(Handler.java:938)
       at android.os.Handler.dispatchMessage(Handler.java:99)
       at android.os.Looper.loopOnce(Looper.java:226)
       at android.os.Looper.loop(Looper.java:313)
       at android.os.HandlerThread.run(HandlerThread.java:67)

[christosts]

@punxoi thank you for the information. May I ask, you mention this occurs 100% on Android 12. Is that Android 12 (API 31) or Android 12L (API 32)? Everything should be on 12L (API 32), but if you've seen any reports in API 31, that would be an interesting data point.

It's unclear yet why this error happens.

[christosts]

@asos-edgeorge also on

it seems 86% of crashes occur when the app is in the background

what is the behavior of your app when it's sent to the background? For example, does it continue to play media, does it release the player, anything in between?

[asos-edgeorge]

@christosts 

what is the behavior of your app when it's sent to the background? For example, does it continue to play media, does it release the player, anything in between?

So as far as I can tell, we are calling player.stop(true) which looks to be deprecated

Edit: Should you wish to see a video of this behaviour I would be happy to email it to the address within the Exoplayer Bug Report template

[punxoi]

@christosts

@punxoi thank you for the information. May I ask, you mention this occurs 100% on Android 12. Is that Android 12 (API 31) or Android 12L (API 32)? Everything should be on 12L (API 32), but if you've seen any reports in API 31, that would be an interesting data point.

It's unclear yet why this error happens.

Firebase Crashlytics seems to show both 12 and 12L as 12.