Android Proguard Javascript Interface Fail

Question

I use in my project a piece of code as described here

http://lexandera.com/2009/01/extracting-html-from-a-webview/

I create the .apk file, install it on my d

Answer 1

As suggested by edit in question, out of those suggestions, only using

-keepclassmembers class com.mypackage.MyClass$MyJavaScriptInterface { public *; }

with Important -

For API 17+ to preserve @JavascriptInterface annotations:

-keepattributes JavascriptInterface

(Which was stopping my app to work on Marshmallow)