I've been trying to write a library in kotlin and once the library build is generated as aar file when opening it in Android Studio it is not showing me how my class exactly looks and how the methods are implemented in that.
// IntelliJ API Decompiler stub source generated from a class file
// Implementation of methods is not available
package com.mypackage.dexter
public final class Test private constructor() {
public final fun testMethod(): kotlin.Unit { /* compiled code */ }
}
I've tried Java decompiler plugin in android studio, Kotlin Byte code (This also doesn't show it in the same format that we get if the same code is written in Java). The ultimate thing that I wanted to achieve by looking at the code is that I want to use debugger in the library and evaluate things while running my application where this library is integrated.
Related
I have an .aar third party library that I want to use in Xamarin Android. So I created a new Android Bindings Library, added the aar-library and changed the Build action of the aar file to LibraryProjectZip like described here: https://learn.microsoft.com/en-us/xamarin/android/platform/binding-java-library/binding-an-aar
Nothing else was changed and I would expect the project to compile and generate a dll file.
Instead I get a lot of errors saying Error CS0542 'xy': member names cannot be the same as their enclosing type.
When I jump to the origin of the error, I find the errors in generated code by Visual Studio with the classes looking something like:
public abstract class Albumin : Java.Lang.Object {
internal Albumin ()
{
}
// (removed for readability)
[Register ("ALBUMIN")]
public const string Albumin = (string) "albumin";
I cannot modify the source code of the library.
What can I do in order to build the Binding Library successfully?
Thank you very much #Leo Zhu for the answer in the comments:
The solution is Renaming Members.
So in my case the Metadata.xml in die Binings Library would look like the following:
<attr path="/api/package[#name='com.company.android.sdk.dataclass']/interface[#name='DataClass.Albumin']/field[#name='ALBUMIN']" name="name">ALBUMIN_Binding</attr>
I have model
#Data
#AllArgsConstructor
#NoArgsConstructor
public class ProductsRequest {
private String initiatorType;
private String categoryCode;
I have lombok config:
lombok.anyConstructor.suppressConstructorProperties = true
lombok.addGeneratedAnnotation = false
On android with API 27(Android 7 on real device) all work fine. On android 17(Android 4.2 on emulator) In this line I get error:
return restApiFactory.getProductService().getProducts(productsRequest);
error:
Caused by: java.lang.ClassNotFoundException: Didn't find class "java.beans.ConstructorProperties" on path: /data/app/my-1.apk
If I change
#AllArgsConstructor
#NoArgsConstructor
to standart constructors - all work fine
Because I never experienced such issue with ctor-s I encourage you to describe your problem in more detail. I assume the code you manually wrote somehow differs from the code lombok generated. Might be the visibility of methods or some special annotation added.
Using delombok feature (https://projectlombok.org/features/delombok) you will expand the annotations to real code. Than you can diff your manually written code and lombok generated code. So you can explore if #java.beans.ConstructorProperties added or not above the code lombok generated. (Delombok using Gradle)
Note: Actually you will have 3 ctor: #AllArgsConstructor, #NoArgsConstructor and #RequiredArgsConstructor is implicitly covered in #Data.
Based on your lombok.config file, ctor-s should not have an annotation. Could it be that some of your flavors are missing the lombok.config on class path?
I wrote a library which has been uploaded to a private server. When I include the library as a dependency in my app project, and view the source code from one of the library classes, the source code isn't actually decompiled. It only shows the class name and methods. For example:
package com.example.library.ui
public final class RoundedDrawable public constructor() : android.graphics.drawable.Drawable {
public final var backgroundColor: kotlin.Int /* compiled code */
// ... other similar fields
public open fun draw(canvas: android.graphics.Canvas): kotlin.Unit { /* compiled code */ }
// ... other similar functions
}
As you can see, it only displays /* compiled code */ comments, and not the full source code. There is an option presented to "Decompile to Java"; which works, but I would much rather see the Kotlin source. Is this possible?
I found similar question that explains how to show the original Java code, but nothing for Kotlin.
Are you using Gradle?
You need to download sources for the library:
idea {
module {
downloadJavadoc = true
downloadSources = true
}
}
If attached sources/documentation are found, IntelliJ will use these when viewing .class files.
With Maven, you can do this from the tool window with Right click -> Download Sources
Other than that, decompiling a .class file to Kotlin is not possible with good results. Despector has a very rough Kotlin "decompiler".
When Releasing the library with maven publish, you can specify the source jar.
In this example, if your library is in Kotlin and Java, to add both source codes.
task androidSourcesJar(type: Jar) {
archiveClassifier = 'sources'
from (android.sourceSets.main.java.sourceFiles, android.sourceSets.main.kotlin.sourceFiles)
}
I would like to use the Scala (2.11) reflection package's runtime mirror in a Scala application compiled for android which is being build using Scala on android.
I was able to fiddle with ProGuard options in order to make it include the required Scala classes. However when I try to get a mirror instance:
universe.runtimeMirror(this.getClass.getClassLoader)
(Indeed it fails during the lazy computation of universe)
The application crashes in run time:
java.lang.NoClassDefFoundError: Failed resolution of: Ljava/rmi/Remote;
at scala.reflect.internal.Definitions$DefinitionsClass.RemoteInterfaceClass$lzycompute(Definitions.scala:370)
at scala.reflect.internal.Definitions$DefinitionsClass.RemoteInterfaceClass(D efinitions.scala:370)
at scala.reflect.runtime.JavaUniverseForce$class.force(JavaUniverseForce.scal a:255)
at scala.reflect.runtime.JavaUniverse.force(JavaUniverse.scala:16)
at scala.reflect.runtime.JavaUniverse.init(JavaUniverse.scala:147)
at scala.reflect.runtime.JavaUniverse.<init>(JavaUniverse.scala:78)
at scala.reflect.runtime.package$.universe$lzycompute(package.scala:17)
at scala.reflect.runtime.package$.universe(package.scala:17)
This crash is for me as expected as it isn't:
It is expected as java.rmi is not part of the Android API and I should expect any code trying to load its classes to crash.
It is unexpected as I didn't know that Scala's reflect package used java.rmi
I have traced the code to were rmi is required, that is to JavaUniverse (a trait mixed in JavaUniverse class) force method:
...
definitions.RemoteInterfaceClass
...
Which leads to DefinitionsClass:
lazy val RemoteInterfaceClass = requiredClass[java.rmi.Remote]
Am I wrong to think that this is a no-go for Scala reflection in Android?
If I am, what could be a workaround to this problem?
To summarize your solution and a related solution, it is sufficient to add two files, and modify build.sbt to include:
dexAdditionalParams in Android += "--core-library"
Add java/rmi/Remote.java to your project with the content:
package java.rmi;
public interface Remote {}
Add java/rmi/RemoteException.java to your project with the content:
package java.rmi;
public interface RemoteException {}
Iam trying to bind a jar(zubhium sdk jar) file to my mono droid project. I have followed their guide on xamarins website and created a new binding project which I reference I my mono droid project.
I am having some issues with package names. I get the following error:
Error 3 package com.zubhium.interfaces does not exist
com.zubhium.interfaces.ZubhiumListener
C:\Users\jbp\Desktop\ny\CmsApp.Droid\obj\Debug\android\src\mono\com\zubhium\interfaces\ZubhiumListenerImplementor.java 8 25 CmsApp.Droid
from the genrated source:
package mono.com.zubhium.interfaces;
public class ZubhiumListenerImplementor
extends java.lang.Object
implements
mono.android.IGCUserPeer,
com.zubhium.interfaces.ZubhiumListener
And that is because when the project is wrapped it automaticly adds mono(.com.zubhium....) to the package name. I cant find how to remove this mono or if i can set a rule to add this part.
I tried to put <attr path="/api/package[#name='com.zubhium.interfaces']" name="managedName">mono.com.zubhium.interfaces</attr>
in the xmldata.xml file but that did not work.
Do you guys have any sugestions?
Regards
package com.zubhium.interfaces does not exist
When you bind a .jar library and reference the binding project from another project, you need to also add the .jar to your Application project and set its Build action to AndroidJavaLibrary.
Failure to do so means that the .jar won't be added to the javac $CLASSPATH, resulting in javac compilation errors when compiling the Android Callable Wrapper (as you saw), and that the .jar won't included into your final .apk. Both of these are Bad™.
And that is because when the project is wrapped it automaticly adds mono(.com.zubhium....) to the package name.
That's for an "Implementor" type; you can ignore it. It's used as part of the implementation of events. If you look at the generated C# code, there should be:
[global::Android.Runtime.Register ("mono/com/zubhium/interfaces/ZubhiumListenerImplementor")]
internal sealed class ZubhiumListenerImplementor : Java.Lang.Object, IZubhiumListener {
// ...
}
The mono.com.zubhium.interfaces.ZubhiumListenerImplementor is the ACW for the internal ZubhiumListenerImplementor type.
You can't rename this type; it's an internal construct that isn't controlled via metadata.