51     private ArrayList<Planet> mSolarSystem;  field in MainActivity
64         mSolarSystem = initializeSolarSystem();  in onCreate()
71         int imageId = getResources().getIdentifier(mSolarSystem.get(mSelectedPlanet).getImage(),  in onCreate()
144                 toastMessage = mSolarSystem.get(mSelectedPlanet).getName();  in onMenuItemClick()
147                 toastMessage = mSolarSystem.get(mSelectedPlanet).getMoons();  in onMenuItemClick()
150                 toastMessage = mSolarSystem.get(mSelectedPlanet).getVolume();  in onMenuItemClick()
153                 toastMessage = mSolarSystem.get(mSelectedPlanet).getSurfaceArea();  in onMenuItemClick()
182             return mSolarSystem.size();  in getCount()
190             String selectedPlanetImage = mSolarSystem.get(mSelectedPlanet).getImage();  in onItemSelected()
198             return mSolarSystem.get(pos).getName();  in getItemText()
203             String navigationIcon = mSolarSystem.get(pos).getNavigationIcon();  in getItemDrawable()