Java.Lang.ClassNotFoundException: Didn't find class "android.app.PictureInPictureParams$Builder"

[shankar12]

Steps to Reproduce

Downloaded PictureInPicture Sample from https://developer.xamarin.com/samples/monodroid/android-o/PictureInPicture/

1. Opened the Project on VS for MAC and Restored all Packages
2. Tried to run the project and got a runtime exception: System.NotSupportedException
   
3. Under System.NotSupportedException, there was Java.Lang.ClassNotFoundException

PictureInPicture.zip

Expected Behavior

The App Should work for PictureInPicture feature

Actual Behavior

Throws a Runtime Exception

Version Information

=== Visual Studio Community 2017 for Mac ===

Version 7.3.2 (build 12)
Installation UUID: aed07d58-dc28-46be-99a7-82fcbd01df4b
Runtime:
Mono 5.4.1.7 (2017-06/e66d9abbb27) (64-bit)
GTK+ 2.24.23 (Raleigh theme)

Package version: 504010007

=== NuGet ===

Version: 4.3.1.4445

=== .NET Core ===

Runtime: /usr/local/share/dotnet/dotnet
Runtime Version: 2.0.0
SDK: /usr/local/share/dotnet/sdk/2.0.0/Sdks
SDK Version: 2.0.0
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/5.4.1/lib/mono/msbuild/15.0/bin/Sdks

=== Xamarin.Profiler ===

Version: 1.6.0
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler

=== Apple Developer Tools ===

Xcode 9.1 (13532)
Build 9B55

=== Xamarin.iOS ===

Version: 11.6.1.2 (Visual Studio Community)
Hash: 6857dfcc
Branch: xcode9.2
Build date: 2017-12-04 21:20:41-0500

=== Xamarin.Android ===

Version: 8.1.0.25 (Visual Studio Community)
Android SDK: /Users/mumashankar/Library/Android/sdk
Supported Android versions:
4.4 (API level 19)
5.1 (API level 22)
6.0 (API level 23)
7.1 (API level 25)
8.0 (API level 26)

SDK Tools Version: 26.1.1
SDK Platform Tools Version: 26.0.2
SDK Build Tools Version: 26.0.2

Java SDK: /usr
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)

Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL

=== Xamarin Inspector ===

Version: 1.3.2
Hash: 461f09a
Branch: 1.3-release
Build date: Tue, 03 Oct 2017 18:26:57 GMT
Client compatibility: 1

=== Xamarin.Mac ===

Version: 4.0.0.214 (Visual Studio Community)

=== Build Information ===

Release ID: 703020012
Git revision: 7d0c9d7ad46b125cf4b7bbf9532c0531b6433ce6
Build date: 2017-12-12 14:03:18-05
Xamarin addins: 6dddaa49fbecb2695fcdcd6b712eb269e288518c
Build lane: monodevelop-lion-d15-5

=== Operating System ===

Mac OS X 10.12.6
Darwin 16.7.0 Darwin Kernel Version 16.7.0
Wed Oct 4 00:17:00 PDT 2017
root:xnu-3789.71.6~1/RELEASE_X86_64 x86_64

=== Enabled user installed addins ===

Internet of Things (IoT) development (Preview) 7.1

Log File

VSForMAC LOG.docx

[jonpryor]

On what device did you run this on? Which version of Android?

How exactly did you interact with the program once launched? Did you rotate the screen? Hit the back button?

I am not able to reproduce the issue.

Could you please enable GREF logging?

$ adb shell setprop debug.mono.log gref

Completely quit the app, the restart it.

When you've gotten it to crash again, grab the GREF log from the device:

$ adb shell run-as com.xamarin.PictureInPicture cat files/.__override__/grefs.txt > grefs.txt

Then please attach grefs.txt.

---

What I'm Looking For

I'm trying to determine where and why the wrapper was destroyed. Usually the NotSupportedException is thrown because a Java.Lang.Object instance is e.g. Dispose()d of, and then Java invokes a method which is overridden in managed code. This virtual method invocation requires that an instance exist to process the virtual method, and if a pre-existing instance doesn't exist, we attempt to create one. When we can't create one, the NotSupportedException is thrown.

GC Bug?

Another possibility is that this is a GC bug. Follow the link for a description of how to use the legacy GC bridge implementation.

If this is a GC bug, please let us know. We've been trying unsuccessfully for ages to find a decent fix for that bug. Perhaps it requires a specific set of hardware?

[JonDouglas]

I am closing this issue due to no further information being provided. See the need-info tag for more information.

[tuyen-vuduc]

Hi,

I just faced this issue on Nexus 4, Android 19.

The code is

    public static class MvxRecyclerViewExtensions
    {
        public static void AddLoadMoreListener(this MvxRecyclerView recyclerView, Action action)
        {
            recyclerView.SetOnScrollChangeListener(new OnScrollChangeListener(action));
        }
    }

    public class OnScrollChangeListener : Java.Lang.Object, View.IOnScrollChangeListener
    {
        Action action;
        public OnScrollChangeListener(Action action)
        {
            this.action = action;
        }

        public void OnScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY)
        {
            if (v is MvxRecyclerView recyclerView)
            {
                if (!recyclerView.CanScrollVertically(1))
                {
                    action?.Invoke();
                }
            }
        }
    }

And the error

[mono-rt] [ERROR] FATAL UNHANDLED EXCEPTION: Java.Lang.NoClassDefFoundError: md5705cc5b777d28ba1476c781645fc231a/OnScrollChangeListener ---> Java.Lang.ClassNotFoundException: Didn't find class "md5705cc5b777d28ba1476c781645fc231a.OnScrollChangeListener" on path: DexPathList[[zip file "/data/app/xxxxx-1.apk"],nativeLibraryDirectories=[/data/app-lib/xxxxx-1, /vendor/lib, /system/lib]]
[mono-rt]    --- End of inner exception stack trace ---
[mono-rt]   at (wrapper dynamic-method) System.Object.2f769105-8aa7-49e7-90dc-9b1e081e6013(intptr,intptr,intptr)
[mono-rt]   --- End of managed Java.Lang.NoClassDefFoundError stack trace ---
[mono-rt] java.lang.NoClassDefFoundError: md5705cc5b777d28ba1476c781645fc231a/OnScrollChangeListener
[mono-rt] 	at md5a70ca10363a39e33f9fee2850b20b5da.XXX.n_onCreate(Native Method)
[mono-rt] 	at md5a70ca10363a39e33f9fee2850b20b5da.XXX.onCreate(MyPromotionsView.java:30)
[mono-rt] 	at android.app.Activity.performCreate(Activity.java:5231)
[mono-rt] 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
[mono-rt] 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
[mono-rt] 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
[mono-rt] 	at android.app.ActivityThread.access$800(ActivityThread.java:135)
[mono-rt] 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
[mono-rt] 	at android.os.Handler.dispatchMessage(Handler.java:102)
[mono-rt] 	at android.os.Looper.loop(Looper.java:136)
[mono-rt] 	at android.app.ActivityThread.main(ActivityThread.java:5001)
[mono-rt] 	at java.lang.reflect.Method.invokeNative(Native Method)
[mono-rt] 	at java.lang.reflect.Method.invoke(Method.java:515)
[mono-rt] 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
[mono-rt] 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
[mono-rt] 	at dalvik.system.NativeStart.main(Native Method)
[mono-rt] Caused by: java.lang.ClassNotFoundException: Didn't find class "md5705cc5b777d28ba1476c781645fc231a.OnScrollChangeListener" on path: DexPathList[[zip file "/data/app/xxxxx-1.apk"],nativeLibraryDirectories=[/data/app-lib/xxxxx-1, /vendor/lib, /system/lib]]
[mono-rt] 	at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
[mono-rt] 	at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
[mono-rt] 	at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
[mono-rt] 	... 16 more

[JonDouglas]

@tuyen-vuduc Your issue has a different class that is not being found on the dex list and thus I believe is different than this issue. Please open up a new issue with a respective reproduction project. Thank you!

[softsan]

I came across this issue but it is happened when the sample is run on Android 7. As stated in Sample and also Android docs that PIP mode only support Android 8 (API 26) and later. It runs fine on those OS. So if anyone testing please make sure you use proper OS with Android device.

[JosiYosi]

I know this issue is an old one. For those who wants to resolve the issue, check android version of a device before running PIP as the following:

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                                  boolean supportsPIP = 
                                          getPackageManager().hasSystemFeature(PackageManager.FEATURE_PICTURE_IN_PICTURE);
          if(supportsPIP){

          
              // if you want to set custom PIP then do like below but your ratio must be between 0.418410 and 2.390000
              //in this case 192/108 ration is approximately 1.7777(within the required range)
              //Note this option is only for android 13 or above
              //Also note that it is not necessary to use aspect ration. Still you can PIP it without using aspect ratio as well.
              //Rational aspectRatio = new Rational(192, 108);
              Rational aspectRatio = new Rational(youTubePlayerView.getWidth(), youTubePlayerView.getHeight());
              PictureInPictureParams params = new PictureInPictureParams.Builder()
                      .setAspectRatio(aspectRatio)// Set actions or aspect ratio.
                      .build();
              enterPictureInPictureMode(params);


          }//end of inner if statement


    }//end of outer if statement`