A singleton manager class that counts on being initialized but saves the call to getInstance() from every accessor. Downside: you have static methods that rely on internal state.

MySingletonManager.java

public class MySingletonManager {

    public static final String TAG = MySingletonManager.class.getSimpleName();
    private static MySingletonManager mInstance;
    private Application mContext;
    private ArrayList<PickleData> mSavedPickles = new ArrayList<PickleData>();

    @DebugLog
    private MySingletonManager() {
        // Don't let this class get instantiated directly.
    }

    @DebugLog
    private MySingletonManager(Application context) {
        mContext = context;
    }

    @DebugLog
    public static void initialize(Application context) {
        if (mInstance == null) {
            mInstance = new MySingletonManager(context);
        }
        loadSavedPickles();
    }

    private static MySingletonManager getInstance() {
        if (mInstance == null) {
            throw new IllegalStateException("Call initialize() from your Application class with Application Context.");
        }
        return mInstance;
    }

    @DebugLog
    public static void setSavedPickles() {
      // ...
      PickleData pickleData;
      for (int i = 0; i < size; i++) {
        pickleData = getInstance().mSavedPickles.get(i);
        pickleData.setId(i);
        // ...
      }
      // ...
    }

    @DebugLog
    public static ArrayList<PickleData> getSavedPickles() {
        return getInstance().mSavedPickles;
    }

    @DebugLog
    public static void loadSavedPickles() {
      getInstance().mSavedPickles.clear();
      // ...
      for (int i = 0; i < num; i++) {
        // ...
        getInstance().mSavedPickles.add(new PickleData(i, obj, getInstance().mContext));
      }
    // ...
    }
}