52     private ArrayList<Planet> mSolarSystem;  field in MainActivity
65         mSolarSystem = initializeSolarSystem();  in onCreate()
72         int imageId = getResources().getIdentifier(mSolarSystem.get(mSelectedPlanet).getImage(),  in onCreate()
140                 toastMessage = mSolarSystem.get(mSelectedPlanet).getName();  in onMenuItemClick()
143                 toastMessage = mSolarSystem.get(mSelectedPlanet).getMoons();  in onMenuItemClick()
146                 toastMessage = mSolarSystem.get(mSelectedPlanet).getVolume();  in onMenuItemClick()
149                 toastMessage = mSolarSystem.get(mSelectedPlanet).getSurfaceArea();  in onMenuItemClick()
178             return mSolarSystem.size();  in getCount()
186             String selectedPlanetImage = mSolarSystem.get(mSelectedPlanet).getImage();  in onItemSelected()
194             return mSolarSystem.get(pos).getName();  in getItemText()
199             String navigationIcon = mSolarSystem.get(pos).getNavigationIcon();  in getItemDrawable()