用RxBus替代EventBus、Otto

RxJava已经渐渐走进了程序员的日常生活，用习惯了EventBus的Coder哥决定用Rxjava的思想来实现一个Rxbus，用于替代EventBus。闲话少说，直接上代码，欢迎批评指正。

import rx.Observable;
import rx.subjects.PublishSubject;
import rx.subjects.SerializedSubject;
import rx.subjects.Subject;

/**
 * 类描述：RxBus，时间事件总线
 */
public class RxBus {

    private final Subject bus;

    private RxBus() {
        bus = new SerializedSubject<>(PublishSubject.create());
    }

    public static RxBus getInstance() {
        return SingletonHolder.mInstance;
    }

    // 采用内部类的方式实现单例，线程安全
    private static class SingletonHolder {
        private static final RxBus mInstance = new RxBus();
    }

    public synchronized  Observable toObservable(Class eventType) {
        return bus.ofType(eventType);
    }

    // 发送一个事件
    public void post(Object content) {
        bus.onNext(content);
    }
}

使用方式:

public class CenterListFragment extends Fragment {

    private RecyclerView mRecyclerView;
    private List mMovieList = new ArrayList<>();
    private RecyclerViewAdapter mAdapter;
    private Subscription mSubscription;

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        initRxBus();  
    }

    /**
     * 在onCreate或是onResume中注册相应的监听事件
     */
    private void initRxBus() {
        mSubscription = RxBus.getInstance().toObservable(IEvent.class).subscribe(new Action1() {
            @Override
            public void call(IEvent event) {
                if (event instanceof DownloadFinishEvent) {
                    Log.d("##!##", "CenterFragment接收到事件");
                    return;
                }
            }
        }, new Action1() {
            @Override
            public void call(Throwable throwable) {
                // TODO: 处理异常
            }
        });
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        mRecyclerView = (RecyclerView) inflater.inflate(R.layout.list_fragment, container, false);
        return mRecyclerView;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(mRecyclerView.getContext()));
        mAdapter = new RecyclerViewAdapter(getActivity(), mMovieList);
        mRecyclerView.setAdapter(mAdapter);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        mSubscription.unsubscribe();   //反注册RxBus，防止内存泄漏
    }
}

IEvent.java

/**
* 类描述：事件接口
*/
public interface IEvent {
}

DownloadFinishEvent.java

/**
* 类描述：下载结束事件
*/
public class DownloadFinishEvent implements IEvent {

}