library/src/main/java/com/oguzdev/circularfloatingactionmenu/library/FloatingActionMenu.java
public View getActivityContentView() {
        try {
            return ((Activity) mainActionView.getContext()).getWindow().getDecorView().findViewById(android.R.id.content);
        }
        catch(ClassCastException e) {
            throw new ClassCastException("Please provide an Activity context for this FloatingActionMenu.");
        }
    }
public View getActivityContentView() {
        try {
            return ((Activity) mainActionView.getContext()).getWindow().getDecorView().findViewById(android.R.id.content);
        }
        catch(ClassCastException e) {
            throw new ClassCastException("Please provide an Activity context for this FloatingActionMenu.");
        }
    }
Finds and returns the main content view from the Activity context.
@return the main content view