I have been trying to bind an AAR library in Xamarin and I was able to build it with few warnings.
But as soon as I try to use an activity from the resulted DLL, I get this error:
Failed resolution of: Lcom/spectratech/lib/R$layout;
I have checked the library and it has all the resources present in res folder and working in Android Studio.
I have tried every solution available on the internet like Clean and Build and enabling Multidex but could not make it work.
Resources are not being loaded from the library.
Any suggestions?
Related
My shared library cannot resolve using RestSharp; among other related namespaces. RestSharp is an installed package and is resolvable in the Droid/iOS projects but cannot be found in the Shared Library. I know this works because I'm using RestSharp in a MonoGame project in the same way. The shared library is referenced in the Droid/iOS projects but still fails during compilation.
Any advice? I tried clean all.
Update I created a new Cross Platform Native app solution and I was able to reference in my shared library without issue. That original project is a bit older and was created with PCL originally. I still want to know why it's not working in my original solution.
I continued to have lots of namespace and type not found issues. Once I showed warnings instead of just errors I found that the csproj was missing. After removing the reference in the native apps and re-adding the issue was resolved. Quite frusterating.
Summary
When binding a JAR/AAR built on top of aws-java-sdk, do you have to EmbeddedReferenceJar all the libraries below your JAR, down to and including the aws-java-sdk, when down at that low level the AWS SDK for .NET has the functionality.
Are there any Xamarin packages (Xamarin.Forms or Xamarin.Android) that give an out-of-the box authentication UI with Sign-In/Sign-Up buttons for AWS user pools, Google+, Facebook authentication providers ?
Context
I would like to use SignInUI from aws-android-sdk-auth-ui in a Xamarin.Android app, which gives you an out-of-the-box UI for authentication to AWS. I've got the AWS UserPool and AWS IdentityPool setup already.
Unfortunately, the AWS SDK for .NET does not expose the equivalent aws-android-sdk-auth-ui a java package built on top of aws-android-sdk-auth-core (also unavailable in .NET), which is built on top of aws-android-sdk-core and finally aws-java-sdk.
I thought about binding a java library. I would create a Xamarin binding project for aws-android-sdk-auth-ui.aar downloaded from maven Central. I followed the Binding an .AAR tutorial. It builds, but the generated aws-android-sdk-auth-ui.dll file is missing some classes. I opened the dll with Ildasm.exe and in the Com.Amazonaws.Mobile.Auth.UI namespace I only found AuthUIConfiguration and BuildConfig, clearly missing the SignInUI class.
Is it expected that when you build a binding project for an .aar file that references other .jar, the build succeeds but silently does not produce wrapper classes for java classes who reference missing jars? I would have guessed building would succeed AND would include a wrapper for all classes, but a failure would occur at runtime in codepaths that require the missing jar.
Alright, so I added aws-android-sdk-auth-core.jar, aws-android-sdk-core.jar to the bindings project, as EmbeddedReferencedJar. That did not help, the generated dll is also missing the same classes. The build output pasted below does point in the direction of misssing reference jars. See below.
How far do I need to go though, do I also need to embed all the way down to the 80MB aws-java-sdk.jar?
I have the following build output:
1>JARTOXML : warning J2X9001: Couldn't load class com/amazonaws/mobile/auth/ui/SignInActivity : java.lang.NoClassDefFoundError: android/support/v7/app/AppCompatActivity
1>JARTOXML : warning J2X9001: Couldn't load class com/amazonaws/mobile/auth/ui/SignInUI$1 : java.lang.NoClassDefFoundError: com/amazonaws/mobile/auth/core/DefaultSignInResultHandler
1>JARTOXML : warning J2X9001: Couldn't load class com/amazonaws/mobile/auth/ui/SignInActivity$SignInProviderResultHandlerImpl : java.lang.NoClassDefFoundError: com/amazonaws/mobile/auth/core/signin/SignInProviderResultHandler
android/support/v7/app/AppCompatActivity indicates that com.android.support:appcompat isn't found. How are those supposed to bind? In Xamarin.Android these classes are in
Xamarin.Android.Support.v7.AppCompat Nuget package. But the jar does not know it's running in Xamarin.Android. Does that mean I also need to EmbedReferenceJar all the native Android stuff as well? That's a deep rabbit hole...
com/amazonaws/mobile/auth/core/DefaultSignInResultHandler: that one should not error, I did embed aws-android-sdk-auth-core.jar with EmbbededRefenceJar
Update:
Someone referred me to Xamarin.GradleBindings. I haven't tested this yet, but thought I'd share in hopes this can be useful to other readers.
I have created a binding library in Xamarin with a .jar file. If I give the option as EmbeddedJar the project was compiling and running properly. But if I change it to InputJar then I am getting compile time error:
error:package come.abc.util does not exist com.abc.util.IListener.
I need to use InputJar because of some licencing issue. Please help.
I found a solution for this! At least in my case I had success.
You have to change the Android Options - Linking to "Sdk and User Assemblies" you find that one in the properties of your application.
After setting this option, my build went through and everything worked fine.
Using the google play games services and Admob plugin I cannot seem to get my back to build into an APK and I am receiving the following error message. Any help would be appreciated as I have removed some duplicate files but I am still failing to find why I cannot build my app.
I am using Unity Unity 5.6.1f1 (64-bit).
game services: https://github.com/playgameservices/play-games-plugin-for-unity Ads: https://github.com/unity-plugins/Firebase-Admob-Unity
CommandInvokationFailure: Unable to convert classes into dex format.
C:/Program Files/Java/jdk1.8.0_121\bin\java.exe -Xmx2048M -Dcom.android.sdkmanager.toolsdir="C:/Users/Jack/AppData/Local/Android/sdk\tools" -Dfile.encoding=UTF8 -jar "C:\Program Files\Unity\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\sdktools.jar" -
stderr[
Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/internal/zzbyb;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/internal/zzbyc;
2 errors; aborting
]
Some Background
When Unity builds your project for Android, it invokes several tools from the Android SDK. As part of that process, it converts all of your native (Java) code for Android into a file format called DEX (Dalvik executable).
All of your Android plugins get built up into a single package using that tool. The problems start when a few plugins have the same compiled Java code (classes) in them. This will cause the DEX tool to fail with an error like the one you're seeing:
Uncaught translation error: java.lang.IllegalArgumentException:
already added: Lcom/google/android/gms/internal/zzbyb;
Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/internal/zzbyc;
This means that classes with those names were already included in another library, and so they cannot be added again.
Possible Causes
As explained above, this error occurs when you have duplicate plugins in your project; this can happen in different scenarios, here are some examples:
The same plugin is included more than once, under different folders of the project.
The same plugin is included more than once with different versions.
A plugin contains other dependencies "embedded" inside it, but these dependencies are already included in the project in some form.
How To Fix
You should look up duplicate Android plugins in your project and eliminate them (keep only 1 copy). From the error message you posted, the issue here is related to Google play services libraries. You should look into that (libraries named play-services-xxxx.aar).
Paid Help (Shameless Plug)
I provide a professional service for fixing this exact kind of issue. In case you (or anyone else) are not able to resolve such an issue themselves, feel free to contact me and get it solved.
I was facing the same problem after add admob in my project, here are 2 possible solutions:
Go to the file >> build settings and change the option internal to gradle
Open libs folders separately of both Facebook SDK and Google Play services and delete the matching files
It would be something like (support v4)
Google ads 11.2 has errors. It reuses certain jar classes .
On its own, it isnot an issue
Once you add in another google class, ie firebase, your done for.
There is a fix though. Google put out firebase 4.2 and ads 11.4
I noticed ModernHttp is not being updated long time,
After search some, I noticed there is Xamarin updated version.
here.
https://github.com/xamarin/ModernHttpClient
I want to try this.
But I couldn't find it on nuGet Gallery nor build library to my own.
It gives error "obsolete api" when I try build android library.
Can't understand because I set API level as library use.
Android/OkHttpNetworkHandler.cs(273,48): error CS0619:
System.Net.ServicePointManager.ClientCipherSuitesCallback' is
obsolete:This API is no longer supported.'
Task "Csc" execution -- FAILED
Done building target "CoreCompile" in project "/Users/bright/Devlibs/project/untitled folder/ModernHttpClient2 copy
3/src/ModernHttpClient/ModernHttpClient.Android.csproj".-- FAILED
Done building project "/Users/bright/Devlibs/project/untitled folder/ModernHttpClient2 copy
3/src/ModernHttpClient/ModernHttpClient.Android.csproj".-- FAILED
Build FAILED. Errors:
Any tip please?
Try using this link :
https://components.xamarin.com/view/modernhttpclient
Visual studies and Xamarin studios should have an easy way to add in components.
This link can help with learning about there usage :
https://developer.xamarin.com/guides/cross-platform/xamarin-studio/components_walkthrough/