public void RefreshMapList(){
        if (MapList == 0) {
            MapFragment fragment = (MapFragment) getFragmentManager().findFragmentById(R.id.simpleFrameLayout);
            fragment.RefreshMap();
        }
        else if (MapList == 1) {
            Gallery_Fragment fragment = (Gallery_Fragment) getFragmentManager().findFragmentById(R.id.simpleFrameLayout);
            fragment.RefreshList();
        }
        else {
            MapFragment fragment = (MapFragment) getFragmentManager().findFragmentById(R.id.simpleFrameLayout);
            fragment.RefreshMap();
            Gallery_Fragment fragment2 = (Gallery_Fragment) getFragmentManager().findFragmentById(R.id.simpleFrameLayout);
            fragment2.RefreshList();
        }
    }

FragmentManager fm = getSupportFragmentManager();

//if you added fragment via layout xml
YourFragmentClass fragment = (YourFragmentClass)fm.findFragmentById(R.id.your_fragment_id);
fragment.yourPublicMethod();

Fragment mapFragment = getSupportFragmentManager().findFragmentById(R.id.simpleFrameLayout);
                    if (mapFragment instanceof MapFragment) {
                        ((MapFragment) mapFragment).RefreshMap();
                    }