Lollipop (API 21) is running on about 3.3% according to the current statistics (from here: https://developer.android.com/about/dashboards/index.html ) .

The sample works only from this API level. On previous, it crashes.

If Google tried to show here how to address as many devices and screens, this sample works on a very small fraction of the available ones.

Please make it support the majority of devices out there.

When I import the project ,it shows me Error:Error: File path too long on Windows, keep below 240 characters : D:\project\android-UniversalMusicPlayer-master\android-UniversalMusicPlayer-master\mobile\build\intermediates\exploded-aar\com.google.android.gms\play-services-base\9.4.0\res\drawable-tvdpi-v4\common_google_signin_btn_icon_dark_disabled.9.png I have tried to rename the common_google_signin_btn_icon_dark_disabled.9.png,but it didn't work; how to solve this question?

08-16 10:42:46.643 30212-30212/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                   Process: com.example.android.uamp, PID: 30212
                                                   java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.uamp/com.example.android.uamp.ui.MusicPlayerActivity}: java.lang.RuntimeException: com.google.android.gms.internal.zzsb$zza: No acceptable module found. Local version is 0 and remote version is 0.
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2641)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2710)
                                                       at android.app.ActivityThread.access$800(ActivityThread.java:179)
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1561)
                                                       at android.os.Handler.dispatchMessage(Handler.java:111)
                                                       at android.os.Looper.loop(Looper.java:194)
                                                       at android.app.ActivityThread.main(ActivityThread.java:5803)
                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                       at java.lang.reflect.Method.invoke(Method.java:372)
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1010)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
                                                    Caused by: java.lang.RuntimeException: com.google.android.gms.internal.zzsb$zza: No acceptable module found. Local version is 0 and remote version is 0.
                                                       at com.google.android.gms.internal.zzni.zzbg(Unknown Source)
                                                       at com.google.android.gms.internal.zzni.zza(Unknown Source)
                                                       at com.google.android.gms.cast.framework.CastContext.<init>(Unknown Source)
                                                       at com.google.android.gms.cast.framework.CastContext.getSharedInstance(Unknown Source)
                                                       at com.example.android.uamp.ui.ActionBarCastActivity.onCreate(ActionBarCastActivity.java:141)
                                                       at com.example.android.uamp.ui.BaseActivity.onCreate(BaseActivity.java:49)
                                                       at com.example.android.uamp.ui.MusicPlayerActivity.onCreate(MusicPlayerActivity.java:57)
                                                       at android.app.Activity.performCreate(Activity.java:6107)
                                                       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2594)
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2710) 
                                                       at android.app.ActivityThread.access$800(ActivityThread.java:179) 
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1561) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:111) 
                                                       at android.os.Looper.loop(Looper.java:194) 
                                                       at android.app.ActivityThread.main(ActivityThread.java:5803) 
                                                       at java.lang.reflect.Method.invoke(Native Method) 
                                                       at java.lang.reflect.Method.invoke(Method.java:372) 
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1010) 
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) 
                                                    Caused by: com.google.android.gms.internal.zzsb$zza: No acceptable module found. Local version is 0 and remote version is 0.
                                                       at com.google.android.gms.internal.zzsb.zza(Unknown Source)
                                                       at com.google.android.gms.internal.zzni.zzbg(Unknown Source) 
                                                       at com.google.android.gms.internal.zzni.zza(Unknown Source) 
                                                       at com.google.android.gms.cast.framework.CastContext.<init>(Unknown Source) 
                                                       at com.google.android.gms.cast.framework.CastContext.getSharedInstance(Unknown Source) 
                                                       at com.example.android.uamp.ui.ActionBarCastActivity.onCreate(ActionBarCastActivity.java:141) 
                                                       at com.example.android.uamp.ui.BaseActivity.onCreate(BaseActivity.java:49) 
                                                       at com.example.android.uamp.ui.MusicPlayerActivity.onCreate(MusicPlayerActivity.java:57) 
                                                       at android.app.Activity.performCreate(Activity.java:6107) 
                                                       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123) 
                                                       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2594) 
                                                       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2710) 
                                                       at android.app.ActivityThread.access$800(ActivityThread.java:179) 
                                                       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1561) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:111) 
                                                       at android.os.Looper.loop(Looper.java:194) 
                                                       at android.app.ActivityThread.main(ActivityThread.java:5803) 
                                                       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:1010) 
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) 

start a track open the FullScreenPlayerActivity go back

W/MBServiceCompat: getMediaItem for callback that isn't registered id=BY_GENRE/Genre 1 W/MBServiceCompat: addSubscription for callback that isn't registered id=BY_GENRE/Genre 1

Hi, I've noticed that when I'm playing a song on the list (from the default Google server) to Chromecast Audio and select another song on the list or try to skip to the next song, an error is thrown (see log below) about 5 times and it doesn't progress to the next or selected song. Instead it just moves on to a random song on the list, or keeps playing the same song. This is with the code directly complied and run on a tablet, without any modification. Oh, and this does not happen when Chromecast is not being used. Can anyone please help? Thanks.

11-15 03:08:49.792 18204-18204/com.example.android.uamp E/MediaNotificationServiceImpl: Unregistering trampoline BroadcastReceiver failed java.lang.IllegalArgumentException: Receiver not registered: yy@8f7a15d at android.app.LoadedApk.forgetReceiverDispatcher(LoadedApk.java:789) at android.app.ContextImpl.unregisterReceiver(ContextImpl.java:1200) at android.content.ContextWrapper.unregisterReceiver(ContextWrapper.java:576) at yx.b(:com.google.android.gms.DynamiteModulesC@11746440:105) at yp.onTransact(:com.google.android.gms.DynamiteModulesC@11746440:22) at android.os.Binder.transact(Binder.java:392) at com.google.android.gms.internal.zzed.zzb(Unknown Source) at com.google.android.gms.cast.framework.media.zze.onDestroy(Unknown Source) at com.google.android.gms.cast.framework.media.MediaNotificationService.onDestroy(Unknown Source) at android.app.ActivityThread.handleStopService(ActivityThread.java:3244) at android.app.ActivityThread.-wrap21(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1591) at android.os.Handler.dispatchMessage(Handler.java:111) at android.os.Looper.loop(Looper.java:207) at android.app.ActivityThread.main(ActivityThread.java:5728) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:888) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:749)

Hi-I tried to change the Android support libraries version(to 24.0.0), but it occurs some exception.

C:\Users~\Downloads\Compressed\UniversalMusicPlayer\mobile\build\intermediates\res\merged\debug\values\values.xml Error:(352) Attribute "dotRadius" already defined with incompatible format. Error:(335) Original attribute defined here. Error:Execution failed for task ':mobile:processDebugResources'.

com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:\Users~\Android\Android-Sdk\build-tools\24.0.0\aapt.exe'' finished with non-zero exit value 1

fhas a bug from farbic like this (device running Android 4.x): Caused by java.lang.IllegalArgumentException: MediaButtonReceiver component may not be null. at android.support.v4.media.session.MediaSessionCompat$MediaSessionImplBase.(MediaSessionCompat.java) at android.support.v4.media.session.MediaSessionCompat.(MediaSessionCompat.java) at android.support.v4.media.session.MediaSessionCompat.(MediaSessionCompat.java) at com.zhulang.reader.audio.MusicService.onCreate(MusicService.java:162) at android.app.ActivityThread.handleCreateService(ActivityThread.java:2756) at android.app.ActivityThread.access$1800(ActivityThread.java:151) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1424) at android.os.Handler.dispatchMessage(Handler.java:110) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:5322) at java.lang.reflect.Method.invokeNative(Method.java) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:829) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:645) at dalvik.system.NativeStart.main(NativeStart.java)

How am i able to stream for example an mp3-Stream from an Radio-Station in the UAMP-App? The Source-Code doesnt show anything which could help me...

My aim is to play a simple https://example.com/test.mp3-File which will be played.

Either where are the Media-Files comming from in the Example-App?

In android 8.0 or above, I met a problem.

when i called MediaBrowser.connect() ,it will crash sometimes.

Caused by java.lang.IllegalStateException: connect() called while neither disconnecting nor disconnected (state=CONNECT_STATE_CONNECTING) at android.media.browse.MediaBrowser.connect(MediaBrowser.java:152) at android.support.v4.media.MediaBrowserCompatApi21.connect(Unknown Source:2) at android.support.v4.media.MediaBrowserCompat$MediaBrowserImplApi21.connect(Unknown Source:2) at android.support.v4.media.MediaBrowserCompat.connect(Unknown Source:2)

Looks like connect() being called multiple times.But I called disconnect() in onStop().

I can't reproduce it ,I just saw it in the fabric log.

Each time I choose an item from the list, I can see it and the previous one flashes. Also the notification disappears and re-appears. In addition, each time I choose an item, I don't see its photo on the lock screen, and the notification on the lock screen doesn't have next&previous actions. See attached video: device-2018-07-01-022625.zip

Are those intentional?

Enter the full player screen, tap play-pause-play and then kill the app. Service is killed with it and playback as well. It happens because in onPlaybackStop() callback we're calling stopForeground(true) and foreground service becomes background and is attached to app lifecycle.

I modified following code to set a simple MediaItem one Browsable and one playable. But Still it shows a system default art image.

@Override
public void onLoadChildren(final String parentMediaId, final Result<List<MediaBrowser.MediaItem>> result) {
    // Return the children of the given parent media item
    List<MediaBrowser.MediaItem> children = getChildren(parentMediaId);
    result.sendResult(children);
}  
private List<MediaBrowser.MediaItem> getChildren(String parentId) {
    int drawableResourceId = R.drawable.finallogo;
    Uri drawableUri = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://"
            + "com.examole.app" + "/" + drawableResourceId);
    List<MediaBrowser.MediaItem> children = new ArrayList<>();
    if (parentId.equals("root")) {
 children.add(new MediaBrowser.MediaItem(new MediaDescription.Builder()

                .setMediaId("media_item_1")
                .setTitle("Browsable Item")
                .setSubtitle("test")
                .setIconUri(drawableUri)
                .build(),MediaBrowser.MediaItem.FLAG_BROWSABLE ));
    }else{
        children.add(new MediaBrowser.MediaItem(new MediaDescription.Builder()
            .setMediaId("media_item_1")
            .setTitle("Playable Item")
            .setSubtitle("test2")
                .setIconUri(drawableUri)
            .build(), MediaBrowser.MediaItem.FLAG_PLAYABLE));
    }
    return children;
    }

Can Someone please please help me on this issue. And there are no many examples for Automotive OS out there either. I would Love to know what is going on.

UAMP uses PackageInfo#signatures, see https://github.com/android/uamp/blob/2136c37bcef54da1ee350fd642fc61a744e86654/common/src/main/java/com/example/android/uamp/media/PackageValidator.kt#L107 - this is deprecated in API 28. The newer APIs involve using PackageInfo#signingInfo. The associated APIs on that class - apkContentsSigners, signingCertificateHistory, hasMultipleSigners - need careful attention to ensure they are used correctly. We could adjust UAMP to show proper usage of these APIs.

For reference, this StackOverflow answer - https://stackoverflow.com/a/53407183 - has a reasonable-looking implementation. My understanding is that in the apkContentsSigners path, we should check that all certificates matches, while in the signingCertificateHistory path, we need to only check that one certificate matches.

Android auto does not play whole album songs list

I was testing the Jetpack compose media3 UAMP code. on the polestar emulator and Phone, I noticed the player activity in Auto (Polestar) emulator does not play all the songs from the album

Steps to reproduce

On polestar emulator play the Album Jazz in Paris which has 3 songs

1. jazz in Paris
2. The Messenger 3)Talkies

now when we click on the song -> The messenger it plays only that song and when we click the previous button it goes to the start of that song only, not play the previous song (even after multiple previous clicks).

the next song option is not available at all.

Where as if we test it in the Phone we can play whole album.

like this

pattern to follow for Jetpack Media3

The Android media3 video specifies https://www.youtube.com/watch?v=sTIBDcyCmCg&t=480s , mediacontroller is a player implementation, we can direclty pass it to the playerview,

So do we need a mediaconnection class, or we can directly use the implement in the activity and serviceclass, like it was provied in the mediasessions demo

https://github.com/androidx/media/tree/release/demos/session

follows this pattern , should we follow this , then a lot of code is removed. Then UAMP compose/media3 demo still follows the old pattern , can there be a proper explanation, and if we need to follow the mediasession demo pattern, will the UAMP code be updated to that pattern.

Any Plans to include Dagger Hilt and StateFlow in future Release with media3 and jetpack compose

While the UAMP code has incorporated coroutines, media3 and jetpack compose in the new implementation , however why have they not included dagger hilt and stateflow both developed by google.

Generally it is recommended to use latest technologies and we are required to keep projects updated to the latest android versions and other such requirements, the standard pattern is not followed with examples provided by google itself. comparing the mediasession demo provided by media3 and UAMP , both have followed totally different development paths. This can cause confusion among new developers as to which standard we should follow.

Hit an issue with a too old version of gradle stopping it working in recent Android Studio.

Happy to close, but since I updated some build dependencies, thought it worth offering it up. I understand if there are legacy reason why you don't want upgrades.