dlew

RetrofitService.doTheThing(params)              // Your typical API call
    .subscribeOn(Schedulers.io())               // Execute API call on IO thread
    .observeOn(AndroidSchedulers.mainThread())  // Execute observers on Android's main thread
    .subscribe(results -> handle(results));     // Handling the results of the API call

dlew

public class LazyListManagerUtils {

  public static <T> List<T> add(List<T> list, T item) {
		if (list == null) {
			list = new ArrayList<T>();
			list.add(item);
		}
		else if (!list.contains(item)) {
			list.add(item);
		}

dlew

@SuppressWarnings("unchecked")
public static <T extends View> T findView(Activity activity, int id) {
	return (T) activity.findViewById(id);
}

@SuppressWarnings("unchecked")
public static <T extends View> T findView(View view, int id) {
	return (T) view.findViewById(id);
}