ANR WatchDog Callback Listener using Java Reflection

I want to convert the following API code to Java Reflection code. Need help in converting it

Actual ANRWatchDog code :

 private void initWatchDog() {
    ANRWatchDog watchDog = new ANRWatchDog(5000);
    watchDog.setIgnoreDebugger(true);
    watchDog.setANRListener(new ANRWatchDog.ANRListener() {
        @Override
        public void onAppNotResponding(ANRError anrError) {
            if(anrError != null) {
                FileUtils.saveToFile(anrError.getMessage());
                Tracer.d(TAG, anrError.getMessage());
            }
        }
    });
}

As for now, I'm able to progress till here :

private void invokeANRWatchDog() {
    try {
    Class anrWatchDog = Class.forName("com.github.anrwatchdog.ANRWatchDog");
    Object anrWatchDogObj = anrWatchDog.getConstructor(Integer.class).newInstance(5000);
    Method anrIgnoreDebugger = anrWatchDog.getMethod("setIgnoreDebugger", Boolean.class);
    anrIgnoreDebugger.invoke(anrWatchDogObj, true);

    } catch (Exception e) {
        Tracer.d(TAG, e.getMessage());
    }
}

Now I'm stuck up in converting the below listener callback code for ANR WatchDog:

watchDog.setANRListener(new ANRWatchDog.ANRListener() {
        @Override
        public void onAppNotResponding(ANRError anrError) {
            if(anrError != null) {
                FileUtils.saveToFile(anrError.getMessage());
                Tracer.d(TAG, anrError.getMessage());
            }
        }
    });

Please help me in converting above code to Java Reflection.