add workaround for kotlin

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

Author: dlwetteronline

lib/src/main/java/com/nextcloud/android/sso/api/NextcloudRetrofitServiceMethod.java

@@ -81,7 +81,7 @@ public NextcloudRetrofitServiceMethod(String apiEndpoint, @NonNull Method method
         this.method = method;
         this.returnType = method.getGenericReturnType();
         Annotation[] methodAnnotations = method.getAnnotations();
-        this.parameterAnnotationsArray = method.getParameterAnnotations();
+        this.parameterAnnotationsArray = filterParameterAnnotations(method.getParameterAnnotations());
 
         for (Annotation annotation : methodAnnotations) {
             parseMethodAnnotation(annotation);
@@ -104,8 +104,26 @@ public NextcloudRetrofitServiceMethod(String apiEndpoint, @NonNull Method method
 
     }
 
+    /**
+     * filter out empty parameter annotations (e.g. when using kotlin)
+     * @param annotations
+     * @return
+     */
+    private Annotation[][] filterParameterAnnotations(Annotation[][] annotations) {
+        List<Annotation[]> res = new ArrayList<>();
+
+        for(Annotation[] annotation : annotations) {
+            if(annotation.length > 0) {
+                res.add(annotation);
+            }
+        }
+
+        return res.toArray(new Annotation[res.size()][]);
+    }
+
     public T invoke(NextcloudAPI nextcloudAPI, Object[] args) throws Exception {
-        if(parameterAnnotationsArray.length != args.length) {
+        //if(parameterAnnotationsArray.length != args.length) {
+        if(args.length < parameterAnnotationsArray.length) { // Ignore if too many parameters are given (e.g. when using kotlin)
             throw new InvalidParameterException("Expected: " + parameterAnnotationsArray.length + " params - were: " + args.length);
         }