JavascriptInterface not working with proguard on Android 4.2

I have an issue since android 4.2 with proguard. Basically I use a JavascriptInterface on a webview like this: ``` public class MyJavascriptInterface { public void doSomething() { ... } } ``` Now what I do understand is that when proguard obfuscates the code it renames the class name and method name, so it cannot be called from Javascript anymore. That is why I have to add this to the proguard config: ``` -keepclassmembers class mypackage.MyJavascriptInterface { public void doSomething(); } ``` When I set the target sdk to 17 (Android 4.2) I have to add the `@JavascriptInterface` annotation to my Javascript interface method for security reasons: ``` @JavascriptInterface public class MyJavascriptInterface { public void doSomething() { ... } } ``` Now the problem is that this does not work anymore if proguard is enabled (doSomething is not called as if the class is still renamed in the obfuscation step). If I disable proguard the code works fine. How can I make this work with target sdk 17?