I am working on xamarin application,i want to integrate native android aar in xamarin project.I tried by converting android aar into dll to xamarin project but i am getting so many errors while building.In my android aar so many third party libraries(dagger,rxjava) are there.Is there any way to fix these errors in this project
we are using Android AIDL
sample does not implement inherited abstract member ‘Callable.sData(HttpURLConnection)' (CS0534) (AarBinding)
Error CS0534: ‘Callback' does not implement inherited abstract member '(CS0534) (AarBinding)
Error CS0115: ‘apiRequestContents()': no suitable method found to override (CS0115) (AarBinding)
How to integrate android aar in xamarin project
You could refer to: Binding an .AAR, this walkthrough provides step-by-step instructions for creating a Xamarin.Android Java Bindings Library from an Android .aar file.
If there is some error when you using the binding library, you could refer to the following link:
Approaching a Xamarin.Android Bindings Case.
Customizing Bindings
Troubleshooting Bindings
is xamarin supports android aidl
The answer is Yes. To use them add aidl files into your project and set Build Action to AndroidInterfaceDefinition. Xamarin.Android will generate .cs files, that are compiled together with your source code, so you can use aidl interfaces in your C# code.
Here is the official demo about how to use AIDL in Xamarin.Android.
Related
We use Xamarin Forms and I have been tasked with integrating a 3rd party AAR library from a business partner and I don't have control over the library or its dependencies. This library itself is distributed using Maven, which works great in Android Studio but is a pain in Xamarin, and it has many dependencies on both libraries that are standard in Android as well as other proprietary libraries.
Since I only need to interact with a small portion of the public API of the main library, I've created an Android library (AAR) wrapper project in Android Studio that only exposes the functionality I need and does not use any types that do not already have bindings.
I have created an Android binding project against the AAR wrapper library, and it compiles in Visual Studio without any warnings or errors.
I've created bindings for other libraries in the past and have the Xamarin binding documentation multiple times and searched online, but the part I'm missing is how to include the required/reference JAR/AAR files in the compilation process and the final Android application. Most of the standard libraries that I need already have NuGet packages (Androidx, Google Play Services, etc)., but the binding library compiles without complaint - so how do I include the other required libraries?
Do I really have to create a binding project for each required AAR/JAR and add as a reference? I don't need to interact with the types or resources in these libraries directly from Xamarin since I only interact with the the types/methods exposed in the wrapper AAR (e.g. I don't think I really need a Xamarin binding). Is there a way to simply have Xamarin process the required AARs and JARs without creating a Xamarin binding project for every library that doesn't already have a NuGet package? There are many many dependencies which makes this theoretically possible, but not in practice. There must be an easier way...
I noticed there is an AndroidLibrary build action that the documentation says can be used to directly reference an AAR/JAR file in a Android application, but I can find no examples of how to use this in practice. What does this build action do? How is it supposed to be used? https://learn.microsoft.com/en-us/xamarin/android/deploy-test/building-apps/build-items#androidaarlibrary
Thanks in advance for any help or direction on the best way to do this.
I have an android app using android libraries (dependencies in build.gradle), that I want to use in Xamarin Forms app.
I have prepared android class library with dependencies that I need, add it to Android app and it works as should. Now I want to extract library (not app) - .aar file or other type. Then in Visual Studio create android binding library project, add android library (f.e. aar) under "Jars" folder, compile .dll file and in Xamarin Forms project, add reference to .dll and get needed functionality.
Xamarin app accept binding library, it knows android studio library package, tries to execute method, but then problem occurs "Java.Lang.NoClassDefFoundError". Aar is very light about 40KB, seems like it does not include the library I need, but just reference. Is there a way, that I can have those methods in dll library? I have tried exporting .jar file (weight about 2 MB) but it is also missing classes.
I've been developing a library to use in my project, and while it is working locally, I would like to share it and use it as an external dependency.
How do I wrap my library so that built AAR contains both *.so native library and generated *.java classes (generated by Kotlin compiler) ? Because there are two-way interactions in my library: Kotlin external functions defined in C++, and some C++ code calling Kotlin classes and methods.
So, my questions are:
How to correctly package Kotlin + JNI android library ?
How to upload said package to Bintray so users (and myself) could use it as a dependency ?
(Note: I've seen tutorials and examples, but they were either Kotlin/Android or Java/Jni/Android)
If you want to package .so with your application, note that you can always put it inside JAR file. Then, you can unpack it, and load it using System.load.
You can find sample here: https://github.com/mkowsiak/jnicookbook/tree/master/recipes/recipeNo031
Note
Remember that packaging .so inside application is a risky thing. As you deal with native code, you have to be 100% sure that all native dependencies are there. You have to pay attention to architecture as well.
We have teams which are working on different different technologies. Currently struggling with integration of android native module (Developed in android native language) with existing Xamarin android project.
Actually I got one way that we can convert android native project as a library. This library can integrate to Xamarin project.
I had gone through below links
Convert existing project to library project in Android Studio
https://developer.xamarin.com/guides/android/advanced_topics/using_native_libraries/ ( Integration of android library in xamarin project)
Is this the correct way or do we have any alternate way to achieve it?
Is this the correct way or do we have any alternate way to achieve it?
The document Using Native Libraries is talking about how to use .so file (native libraries) in Xamarin.Android, here is the example.
It is recommended that using Binding Java Library. You could convert your android native project to a .jar or .arr file, then you could refer to Binding a .JAR or Binding an .AAR.
If there is any problem when you trying binding Java Library, you could refer to Troubleshooting Bindings.
I have read the overview for Android Library project. I have in mind to develop an Android project library containing native libraries and JNI wrapper which would be included into the Android project. However, the doc does not explicitly mention if Android library project can include native libraries.
Can anyone confirm/infirm support for native libraries in Android library projects ?
As Android Document said:
An Android library project is a development project that holds shared
Android source code and resources.
An Android Library Project, in fact, isn't so different from normal Android project. You can make a normal android project as library project, except asset folder. They're just different when you declare in Eclipse Buid Path or something similar in other IDEs.
Native support simply, just a call to native layer (as in your post, Native Library) such as C/C++ library file (*.so file). This function is not specific to Android, but in normal Java project also support this feature: Calling functions from another language inside Java.
So, in short answer, yes :)