用RxBus替代EventBus、Otto

来源：互联网发布：怎样用手机淘宝购物编辑：程序博客网时间：2024/06/05 09:08

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<Object, Object> 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 <T> Observable<T> toObservable(Class<T> 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<Movie> 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<IEvent>() {            @Override            public void call(IEvent event) {                if (event instanceof DownloadFinishEvent) {                    Log.d("##!##", "CenterFragment接收到事件");                    return;                }            }        }, new Action1<Throwable>() {            @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 {}

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