We miss some of the registered methods in jnimarshalmethod-gen

[radekdoulik]

For some types we miss some of the registered methods. That leads to problems during registration and later crashes, like here with CellAdapter type:

I/mono-stdout( 2532): Registering JNI marshal methods in Xamarin.Forms.Platform.Android.CellAdapter
W/art     ( 2532): Attempt to remove index outside index area (6 vs 7-7)
W/art     ( 2532): JNI WARNING: DeleteLocalRef(0x1bf00019) failed to find entry

Java side of things describes 10 methods, while jnimarshalmethod-gen finds and generates just 6.

Java side:

__md_methods = 
                        "n_onItemLongClick:(Landroid/widget/AdapterView;Landroid/view/View;IJ)Z:GetOnItemLongClick_Landroid_widget_AdapterView_Landroid_view_View_IJHandler:Android.Widget.AdapterView/IOnItemLongClickListenerInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null\n" +
                        "n_onActionItemClicked:(Landroid/view/ActionMode;Landroid/view/MenuItem;)Z:GetOnActionItemClicked_Landroid_view_ActionMode_Landroid_view_MenuItem_Handler:Android.Views.ActionMode/ICallbackInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null\n" +
                        "n_onCreateActionMode:(Landroid/view/ActionMode;Landroid/view/Menu;)Z:GetOnCreateActionMode_Landroid_view_ActionMode_Landroid_view_Menu_Handler:Android.Views.ActionMode/ICallbackInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null\n" +
                        "n_onDestroyActionMode:(Landroid/view/ActionMode;)V:GetOnDestroyActionMode_Landroid_view_ActionMode_Handler:Android.Views.ActionMode/ICallbackInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null\n" +
                        "n_onPrepareActionMode:(Landroid/view/ActionMode;Landroid/view/Menu;)Z:GetOnPrepareActionMode_Landroid_view_ActionMode_Landroid_view_Menu_Handler:Android.Views.ActionMode/ICallbackInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null\n" +
                        "n_onItemClick:(Landroid/widget/AdapterView;Landroid/view/View;IJ)V:GetOnItemClick_Landroid_widget_AdapterView_Landroid_view_View_IJHandler:Android.Widget.AdapterView/IOnItemClickListenerInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null\n" +
                        "n_onActionItemClicked:(Landroid/support/v7/view/ActionMode;Landroid/view/MenuItem;)Z:GetOnActionItemClicked_Landroid_support_v7_view_ActionMode_Landroid_view_MenuItem_Handler:Android.Support.V7.View.ActionMode/ICallbackInvoker, Xamarin.Android.Support.v7.AppCompat\n" +
                        "n_onCreateActionMode:(Landroid/support/v7/view/ActionMode;Landroid/view/Menu;)Z:GetOnCreateActionMode_Landroid_support_v7_view_ActionMode_Landroid_view_Menu_Handler:Android.Support.V7.View.ActionMode/ICallbackInvoker, Xamarin.Android.Support.v7.AppCompat\n" +
                        "n_onDestroyActionMode:(Landroid/support/v7/view/ActionMode;)V:GetOnDestroyActionMode_Landroid_support_v7_view_ActionMode_Handler:Android.Support.V7.View.ActionMode/ICallbackInvoker, Xamarin.Android.Support.v7.AppCompat\n" +
                        "n_onPrepareActionMode:(Landroid/support/v7/view/ActionMode;Landroid/view/Menu;)Z:GetOnPrepareActionMode_Landroid_support_v7_view_ActionMode_Landroid_view_Menu_Handler:Android.Support.V7.View.ActionMode/ICallbackInvoker, Xamarin.Android.Support.v7.AppCompat\n" +
                        "";

C# side:

[JniAddNativeMethodRegistration]
public static void __RegisterNativeMembers (JniNativeMethodRegistrationArguments args)
{
	Console.WriteLine ("Registering JNI marshal methods in Xamarin.Forms.Platform.Android.CellAdapter");
	args.AddRegistrations (new JniNativeMethodRegistration[6] {
		new JniNativeMethodRegistration ("n_onActionItemClicked", "(Landroid/view/ActionMode;Landroid/view/MenuItem;)Z", new Func<IntPtr, IntPtr, IntPtr, IntPtr, bool> (__<$>_jni_marshal_methods.n_onActionItemClicked_Landroid_view_ActionMode_Landroid_view_MenuItem_)),
		new JniNativeMethodRegistration ("n_onCreateActionMode", "(Landroid/view/ActionMode;Landroid/view/Menu;)Z", new Func<IntPtr, IntPtr, IntPtr, IntPtr, bool> (__<$>_jni_marshal_methods.n_onCreateActionMode_Landroid_view_ActionMode_Landroid_view_Menu_)),
		new JniNativeMethodRegistration ("n_onDestroyActionMode", "(Landroid/view/ActionMode;)V", new Action<IntPtr, IntPtr, IntPtr> (__<$>_jni_marshal_methods.n_onDestroyActionMode_Landroid_view_ActionMode_)),
		new JniNativeMethodRegistration ("n_onPrepareActionMode", "(Landroid/view/ActionMode;Landroid/view/Menu;)Z", new Func<IntPtr, IntPtr, IntPtr, IntPtr, bool> (__<$>_jni_marshal_methods.n_onPrepareActionMode_Landroid_view_ActionMode_Landroid_view_Menu_)),
		new JniNativeMethodRegistration ("n_onItemClick", "(Landroid/widget/AdapterView;Landroid/view/View;IJ)V", new Action<IntPtr, IntPtr, IntPtr, IntPtr, IntPtr, IntPtr> (__<$>_jni_marshal_methods.n_onItemClick_Landroid_widget_AdapterView_Landroid_view_View_IJ)),
		new JniNativeMethodRegistration ("n_onItemLongClick", "(Landroid/widget/AdapterView;Landroid/view/View;IJ)Z", new Func<IntPtr, IntPtr, IntPtr, IntPtr, float, float, bool> (__<$>_jni_marshal_methods.n_onItemLongClick_Landroid_widget_AdapterView_Landroid_view_View_IJ))
	});

The problem is located here https://github.com/xamarin/java.interop/blob/master/tools/jnimarshalmethod-gen/App.cs#L482-L495, where we expect named arguments.