MvvmCross Xamarin Android通过链接挂在初始屏幕上

Question

I am using MvvmCross 6.1.2 with Xamarin Android. With linking “sdk and user assemblies”, my apps hangs in the splash screen. Unlike other linking issues, there is no error in the log. No clue how to fix it.

The normal flow of the init process: Setup.InitializeFirstChance -> App.Initialize -> Setup.InitializeLastChance

What I can identify so far is something get wrong in between App.Initialize and Setup.InitializeLastChance. With linking, app can run up to end of App.Initialize but never reach Setup.InitializeLastChance.

I have attached 2 logs below. Both logs recorded from the end of App.Initialize. The first one is with linking till app hang. The second one is no linking till beginning of Setup.InitializeLastChange.

Log with linking

09-12 15:23:40.260 V/MvvmCross.Core.MvxSetup( 7685): [Verbose] Setup: ViewModelTypeFinder start
Thread started: <Thread Pool> #12
09-12 15:23:40.292 D/Mono( 7685) : Assembly Ref addref a.Core[0xd727b560] -> Acr.UserDialogs[0xd727a9c0]: 3
09-12 15:23:40.294 D/Mono    ( 7685): Assembly Ref addref Acr.UserDialogs[0xd727a9c0] -> mscorlib[0xd727a180]: 73
09-12 15:23:40.295 D/Mono    ( 7685): Assembly Ref addref a.Core[0xd727b560] -> System.Core[0xc61b91e0]: 8
09-12 15:23:40.295 D/Mono    ( 7685): Assembly Ref addref a.Core[0xd727b560] -> Splat[0xd727bd40]: 2
09-12 15:23:40.295 D/Mono    ( 7685): Assembly Ref addref Splat[0xd727bd40] -> mscorlib[0xd727a180]: 74
09-12 15:23:40.298 D/Mono( 7685) : Image addref System.Xml[0xddd06500] -> System.Xml.dll[0xc1166000]: 2
09-12 15:23:40.299 D/Mono( 7685) : Prepared to set up assembly 'System.Xml' (System.Xml.dll)
09-12 15:23:40.299 D/Mono( 7685) : Assembly System.Xml[0xddd06500] added to domain RootDomain, ref_count= 1
09-12 15:23:40.300 D/Mono    ( 7685): AOT: image 'System.Xml.dll.so' not found: dlopen failed: library "/data/app/a.Droid-1/lib/x86/libaot-System.Xml.dll.so" not found
09-12 15:23:40.300 D/Mono( 7685) : AOT: image '/usr/local/lib/mono/aot-cache/x86/System.Xml.dll.so' not found: dlopen failed: library "/data/app/a.Droid-1/lib/x86/libaot-System.Xml.dll.so" not found
09-12 15:23:40.301 D/Mono( 7685) : Config attempting to parse: 'System.Xml.dll.config'.
09-12 15:23:40.301 D/Mono( 7685) : Config attempting to parse: '/usr/local/etc/mono/assemblies/System.Xml/System.Xml.config'.
09-12 15:23:40.301 D/Mono( 7685) : Assembly Ref addref a.Core[0xd727b560] -> System.Xml[0xddd06500]: 2Loaded assembly: System.Xml.dll[External]

09-12 15:23:40.301 D/Mono    ( 7685): Assembly Ref addref System.Xml[0xddd06500] -> mscorlib[0xd727a180]: 75
09-12 15:23:40.302 D/Mono    ( 7685): Assembly Ref addref a.Core[0xd727b560] -> Plugin.Permissions[0xd727b980]: 2
09-12 15:23:40.302 D/Mono    ( 7685): Assembly Ref addref Plugin.Permissions[0xd727b980] -> mscorlib[0xd727a180]: 76
09-12 15:23:40.302 D/Mono    ( 7685): Assembly Ref addref a.Core[0xd727b560] -> Plugin.InAppBilling.Abstractions[0xd727b620]: 3
09-12 15:23:40.302 D/Mono    ( 7685): Assembly Ref addref Plugin.InAppBilling.Abstractions[0xd727b620] -> mscorlib[0xd727a180]: 77
09-12 15:23:40.304 D/Mono    ( 7685): Assembly Ref addref a.Core[0xd727b560] -> MvvmCross.Plugin.Network[0xd727b440]: 2Loaded assembly: System.Net.Http.dll[External]
09-12 15:23:40.308 D/Mono    ( 7685): Image addref System.Net.Http[0xddd06680] -> System.Net.Http.dll[0xc1168300]: 2

09-12 15:23:40.308 D/Mono( 7685) : Prepared to set up assembly 'System.Net.Http' (System.Net.Http.dll)
09-12 15:23:40.308 D/Mono( 7685) : Assembly System.Net.Http[0xddd06680] added to domain RootDomain, ref_count= 1
09-12 15:23:40.310 D/Mono    ( 7685): AOT: image 'System.Net.Http.dll.so' not found: dlopen failed: library "/data/app/a.Droid-1/lib/x86/libaot-System.Net.Http.dll.so" not found
09-12 15:23:40.310 D/Mono( 7685) : AOT: image '/usr/local/lib/mono/aot-cache/x86/System.Net.Http.dll.so' not found: dlopen failed: library "/data/app/a.Droid-1/lib/x86/libaot-System.Net.Http.dll.so" not found
09-12 15:23:40.310 D/Mono( 7685) : Config attempting to parse: 'System.Net.Http.dll.config'.
09-12 15:23:40.310 D/Mono( 7685) : Config attempting to parse: '/usr/local/etc/mono/assemblies/System.Net.Http/System.Net.Http.config'.
09-12 15:23:40.310 D/Mono( 7685) : Assembly Ref addref a.Core[0xd727b560] -> System.Net.Http[0xddd06680]: 2
09-12 15:23:40.310 D/Mono    ( 7685): Assembly Ref addref System.Net.Http[0xddd06680] -> mscorlib[0xd727a180]: 78
09-12 15:23:40.310 D/Mono    ( 7685): Assembly Ref addref a.Core[0xd727b560] -> Newtonsoft.Json[0xd727b740]: 3
09-12 15:23:40.310 D/Mono    ( 7685): Assembly Ref addref Newtonsoft.Json[0xd727b740] -> System.Core[0xc61b91e0]: 9
09-12 15:23:40.310 D/Mono    ( 7685): Assembly Ref addref Newtonsoft.Json[0xd727b740] -> System[0xc61bbd00]: 12
09-12 15:23:40.345 V/MvvmCross.Core.MvxSetup( 7685): [Verbose] Setup: ViewsContainer start
09-12 15:23:40.348 V/MvvmCross.Core.MvxSetup( 7685): [Verbose] Setup: Views start

Log without linking

09-12 15:33:28.200 V/MvvmCross.Core.MvxSetup( 8211): [Verbose] Setup: ViewModelTypeFinder start
09-12 15:33:28.210 D/Mono( 8211) : Assembly Ref addref a.Core[0xe8a8d920] -> Acr.UserDialogs[0xe8a8cd20]: 3
09-12 15:33:28.214 D/Mono    ( 8211): Assembly Ref addref Acr.UserDialogs[0xe8a8cd20] -> mscorlib[0xe8a8c480]: 70
09-12 15:33:28.215 D/Mono    ( 8211): Assembly Ref addref netstandard[0xddd05840] -> System.Core[0xc60af900]: 8
09-12 15:33:28.216 D/Mono( 8211) : Assembly Ref addref a.Core[0xe8a8d920] -> Splat[0xe8a8e280]: 2
09-12 15:33:28.216 D/Mono    ( 8211): Assembly Ref addref Splat[0xe8a8e280] -> mscorlib[0xe8a8c480]: 71
09-12 15:33:28.220 D/Mono( 8211) : Image addref System.Xml[0xddd065c0] -> System.Xml.dll[0xc1c03f00]: 2
09-12 15:33:28.220 D/Mono( 8211) : Prepared to set up assembly 'System.Xml' (System.Xml.dll)
09-12 15:33:28.220 D/Mono( 8211) : Assembly System.Xml[0xddd065c0] added to domain RootDomain, ref_count= 1
09-12 15:33:28.222 D/Mono    ( 8211): AOT: image 'System.Xml.dll.so' not found: dlopen failed: library "/data/app/a.Droid-1/lib/x86/libaot-System.Xml.dll.so" not found
09-12 15:33:28.222 D/Mono( 8211) : AOT: image '/usr/local/lib/mono/aot-cache/x86/System.Xml.dll.so' not found: dlopen failed: library "/data/app/a.Droid-1/lib/x86/libaot-System.Xml.dll.so" not found
09-12 15:33:28.223 D/Mono( 8211) : Config attempting to parse: 'System.Xml.dll.config'.Loaded assembly: System.Xml.dll[External]

09-12 15:33:28.223 D/Mono( 8211) : Config attempting to parse: '/usr/local/etc/mono/assemblies/System.Xml/System.Xml.config'.
09-12 15:33:28.223 D/Mono( 8211) : Assembly Ref addref netstandard[0xddd05840] -> System.Xml[0xddd065c0]: 2
09-12 15:33:28.223 D/Mono( 8211) : Assembly Ref addref System.Xml[0xddd065c0] -> mscorlib[0xe8a8c480]: 72
09-12 15:33:28.224 D/Mono    ( 8211): Assembly Ref addref a.Core[0xe8a8d920] -> Plugin.Permissions[0xe8a8dd40]: 2
09-12 15:33:28.224 D/Mono    ( 8211): Assembly Ref addref Plugin.Permissions[0xe8a8dd40] -> mscorlib[0xe8a8c480]: 73
09-12 15:33:28.224 D/Mono    ( 8211): Assembly Ref addref a.Core[0xe8a8d920] -> Plugin.InAppBilling.Abstractions[0xe8a8d9e0]: 3
09-12 15:33:28.227 D/Mono    ( 8211): Unloading image System.Runtime.dll[0xc1c04400].Loaded assembly: System.Net.Http.dll[External]

09-12 15:33:28.228 D/Mono( 8211) : Image addref System.Runtime[0xddd05a20] -> System.Runtime.dll[0xc60ec000]: 11
09-12 15:33:28.228 D/Mono( 8211) : Config attempting to parse: 'System.Runtime.dll.config'.
09-12 15:33:28.228 D/Mono( 8211) : Config attempting to parse: '/usr/local/etc/mono/assemblies/System.Runtime/System.Runtime.config'.
09-12 15:33:28.228 D/Mono( 8211) : Assembly Ref addref Plugin.InAppBilling.Abstractions[0xe8a8d9e0] -> System.Runtime[0xc60af660]: 9
09-12 15:33:28.229 D/Mono    ( 8211): Assembly Ref addref a.Core[0xe8a8d920] -> MvvmCross.Plugin.Network[0xe8a8d800]: 2
09-12 15:33:28.232 D/Mono    ( 8211): Image addref System.Net.Http[0xddd05a20] -> System.Net.Http.dll[0xc1c05d00]: 2
09-12 15:33:28.232 D/Mono( 8211) : Prepared to set up assembly 'System.Net.Http' (System.Net.Http.dll)
09-12 15:33:28.232 D/Mono( 8211) : Assembly System.Net.Http[0xddd05a20] added to domain RootDomain, ref_count= 1
09-12 15:33:28.233 D/Mono    ( 8211): AOT: image 'System.Net.Http.dll.so' not found: dlopen failed: library "/data/app/a.Droid-1/lib/x86/libaot-System.Net.Http.dll.so" not found
09-12 15:33:28.234 D/Mono( 8211) : AOT: image '/usr/local/lib/mono/aot-cache/x86/System.Net.Http.dll.so' not found: dlopen failed: library "/data/app/a.Droid-1/lib/x86/libaot-System.Net.Http.dll.so" not found
09-12 15:33:28.234 D/Mono( 8211) : Config attempting to parse: 'System.Net.Http.dll.config'.
09-12 15:33:28.234 D/Mono( 8211) : Config attempting to parse: '/usr/local/etc/mono/assemblies/System.Net.Http/System.Net.Http.config'.
09-12 15:33:28.234 D/Mono( 8211) : Assembly Ref addref netstandard[0xddd05840] -> System.Net.Http[0xddd05a20]: 2
09-12 15:33:28.234 D/Mono( 8211) : Assembly Ref addref System.Net.Http[0xddd05a20] -> mscorlib[0xe8a8c480]: 74
09-12 15:33:28.234 D/Mono    ( 8211): Assembly Ref addref a.Core[0xe8a8d920] -> Newtonsoft.Json[0xe8a8db00]: 3
09-12 15:33:28.256 V/MvvmCross.Core.MvxSetup( 8211): [Verbose] Setup: ViewsContainer start
09-12 15:33:28.259 V/MvvmCross.Core.MvxSetup( 8211): [Verbose] Setup: Views start
09-12 15:33:28.289 D/Mono( 8211) : Image addref System.Runtime.Serialization[0xddd05cc0] -> System.Runtime.Serialization.dll[0xc1c06700]: 2
Loaded assembly: System.Runtime.Serialization.dll[External]09-12 15:33:28.289 D/Mono( 8211) : Prepared to set up assembly 'System.Runtime.Serialization' (System.Runtime.Serialization.dll)

09-12 15:33:28.289 D/Mono( 8211) : Assembly System.Runtime.Serialization[0xddd05cc0] added to domain RootDomain, ref_count= 1
09-12 15:33:28.290 D/Mono    ( 8211): AOT: image 'System.Runtime.Serialization.dll.so' not found: dlopen failed: library "/data/app/a.Droid-1/lib/x86/libaot-System.Runtime.Serialization.dll.so" not found
09-12 15:33:28.291 D/Mono( 8211) : AOT: image '/usr/local/lib/mono/aot-cache/x86/System.Runtime.Serialization.dll.so' not found: dlopen failed: library "/data/app/a.Droid-1/lib/x86/libaot-System.Runtime.Serialization.dll.so" not found
09-12 15:33:28.291 D/Mono( 8211) : Config attempting to parse: 'System.Runtime.Serialization.dll.config'.
09-12 15:33:28.291 D/Mono( 8211) : Config attempting to parse: '/usr/local/etc/mono/assemblies/System.Runtime.Serialization/System.Runtime.Serialization.config'.
09-12 15:33:28.291 D/Mono( 8211) : Assembly Ref addref Mono.Android[0xc60af600] -> System.Runtime.Serialization[0xddd05cc0]: 2
09-12 15:33:28.291 D/Mono    ( 8211): Assembly Ref addref System.Runtime.Serialization[0xddd05cc0] -> mscorlib[0xe8a8c480]: 75
09-12 15:33:28.395 V/MvvmCross.Core.MvxSetup( 8211): [Verbose] Setup: CommandCollectionBuilder start
09-12 15:33:28.396 V/MvvmCross.Core.MvxSetup( 8211): [Verbose] Setup: NavigationSerializer start
09-12 15:33:28.398 V/MvvmCross.Core.MvxSetup( 8211): [Verbose] Setup: InpcInterception start
09-12 15:33:28.399 V/MvvmCross.Core.MvxSetup( 8211): [Verbose] Setup: InpcInterception start
09-12 15:33:28.402 V/MvvmCross.Core.MvxSetup( 8211): [Verbose] Setup: LastChance start
09-12 15:33:28.433 D/Mono( 8211) : Assembly Ref addref a.Droid[0xe8a8c600] -> Plugin.LocalNotifications[0xe8a8dce0]: 2
09-12 15:33:28.433 D/Mono    ( 8211): Assembly Ref addref Plugin.LocalNotifications[0xe8a8dce0] -> mscorlib[0xe8a8c480]: 76
09-12 15:33:28.433 D/Mono    ( 8211): Assembly Ref addref Plugin.LocalNotifications[0xe8a8dce0] -> Plugin.LocalNotifications.Abstractions[0xe8a8dc80]: 2

Any help is highly appreciated.

Thanks,

Nick

Answer 1

This kind of situations are very annoying and very hard to diagnose...

First off, I would suggest using linker.config . You will get much more control over what shouldn't be linked away with it - it's very easy to set up as well.

Once you have the linker.config file in place, I would suggest trying the setup that I use for one of my apps:

<?xml version="1.0" encoding="utf-8"?>
<linker>   
    <assembly fullname="MvvmCross">
        <type fullname="MvvmCross.IoC.MvxPropertyInjector"/>
        <namespace fullname="MvvmCross.ViewModels" />
    </assembly>
    <assembly fullname="MvvmCross.Forms">
        <type fullname="MvvmCross.Forms.Platforms.Android.Views.MvxFormsAppCompatActivity"/>
    </assembly>
    <assembly fullname="MvvmCross.Droid.Support.V7.AppCompat">
        <type fullname="MvxAppCompatActivity"/>
    </assembly>
</linker>

I've got more assemblies listed in my linker.config file, but I'm not sure how relevant these would be in your case. Please try adding the above to your linker.config file and check if you're still experiencing issues.

If your app still keeps on dying, then what I tend to do is, to literally list all of your assemblies (project references) in the linker file, like so:

<assembly fullname="<Assembly_Name>">
    <type fullname="*"/>
</assembly>
<assembly fullname="<Assembly_2_Name>">
    <type fullname="*"/>
</assembly>

I do this, because even though you might think that it's MvvmCross stuff that's causing problems, chances are that it can be completely different library/assembly. This list, of all of the assemblies, will basically instruct the linker to keep every Type in these assemblies (won't strip a thing!). The app should run just fine with these. Once it does, you start removing assemblies from the list. You can do it one by one or split it in half and remove first or second half - basically start eliminating assemblies. When you do that, you might want to delete bin and obj , with each and every assembly elimination - just to be extra sure that dll's are being re-generated.