getWindow().hasFeature() on API < 11

Question

I need to check if the overlay feature has been set on an ActionBarCompat instance. The getWindow().hasFeature() method is only available on API 11 and up.

How can I check the feature on API < 11 ?

EDIT: Based on the comment, the getFeatures method should be available from API 1 but it is protected scope and I need to access the feature from another class. The hasFeature method, the one I need to use, on the other hand is API 11 and above only. This is what Android Studio shows me and the app crashes on a 2.3.3 device.

FYI, the activity class used here is a custom class that extends ActionBarActivity from the ActionBarCompat library. Don't know if that should make a difference.

Answer 1

You can access private methods using The Reflection API.

boolean hasFeature(int feature) {
    Window window = getWindow(); //get the window instance.
    if (android.os.Build.VERSION.SDK_INT >= 11) { // if we are running api level 11 and later
        return window.hasFeature(feature); //call hasFeature
    } else {
        try {
            Class c = window.getClass();
            Method getFeatures = c.getDeclaredMethod("getFeatures");//get the getFeatures method using reflection
            getFeatures.setAccessible(true);//make it public
            Integer features = getFeatures.invoke(window, null); //invoke it
            return (features.intValue() & (1 << feature)) != 0; //check if we have the feature and return the result.
        } catch (Exception e) {
            return false;//in case invocation fails with any reason
        }
    }
}