Problem with Annotation after updating android studio

Question

I have an implementation made with Socket.IO on android. However after I update the android studio, everything stopped working...

I created routines to facilitate lib implementation, one of them is an Annotation @IOXEvent.

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

@Retention(RetentionPolicy.RUNTIME)
public @interface IOXEvent {
    String value();
}

To make use of this Annotation, I informed the name of the event I would like to hear in the class, as example below:

IOXEvent("mensagem:nova")
public void aoReceberMensagem(String mensagem) {
      Log.i("TESTE", mensagem)
}

It turns out that the class aoReceberMensagem is not used by the code of my app, so it turns gray as if there was no reference to it. Then when using the routine below, the method name comes as "Wait" and the variable ann comes as null.

public void attach(final Object o) {
        Class c = o.getClass();
        for (final Method m : c.getMethods()) {
            IOXEvent ann = m.getAnnotation(IOXEvent.class);
            if(ann != null && !ann.value().equals("")) {
                this.sdd.off(ann.value());
                this.on(ann.value(), new IOXListener() {
                    @Override
                    public void call(Object... args) {
                        try {
                            m.invoke(o, args);
                        } catch (Exception ex) {
                            Log.e("IOX_ERROR", ex.toString());
                        }
                    }
                });
            }
        }
    }

I believe that somehow the unused methods are being removed in the build of the app even in debug. Does anyone know how I can fix this?

Answer 1

The problem was not in the Android Studio update but in proguard.

Recently added proguard in the project and no tests were performed with chat.

To resolve the problem I added the line below in the file proguard-rules.pro of the application:

-keepclassmembers class * {
    @com.minhaaplicacao.moon.iox.IOXEvent *;
}