基于Rxjava2的事件总线：Rxbus

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实现事件的通知和订阅的方法：EventBus、otto、Rxbus

基于Rxjava2

Step1：

 compile 'io.reactivex.rxjava2:rxjava:2.1.5' compile 'io.reactivex.rxjava2:rxandroid:2.0.1'

Step2：

package com.xl.test.http.rxBus;/** * Created by hushendian on 2017/11/16. */public class RxBusBaseMessage {    private int code;    private Object object;    public RxBusBaseMessage(int code, Object object) {        this.code = code;        this.object = object;    }    public RxBusBaseMessage() {    }    public int getCode() {        return code;    }    public Object getObject() {        return object;    }}

package com.xl.test.http.rxBus;/** * Created by jingbin on 2016/12/2. */public class RxCodeConstants {    // 每日推荐跳转对应type下    public static final int JUMP_TYPE = 0;    // 首页跳转到电影栏    public static final int JUMP_TYPE_TO_ONE = 1;}

package com.xl.test.http.rxBus;import io.reactivex.Observable;import io.reactivex.functions.Function;import io.reactivex.functions.Predicate;import io.reactivex.subjects.PublishSubject;import io.reactivex.subjects.Subject;/** * Created by hushendian on 2017/11/16. */public class RxBus {    private static volatile RxBus instance;    private Subject<Object> bus;    public static RxBus getInstance() {        if (instance == null) {            synchronized (RxBus.class) {                if (instance == null) {                    instance = new RxBus();                }            }        }        return instance;    }    public RxBus() {        bus = PublishSubject.create().toSerialized();    }    public void send(Object o) {        bus.onNext(o);    }    /**     * 提供了一个新的事件,根据code进行分发     *     * @param code     * @param o     */    public void send(int code, Object o) {        bus.onNext(new RxBusBaseMessage(code, o));    }    public Observable<Object> toObservable() {        return bus;    }    /**     * 根据传递的eventtype类型返回特定类型（eventype）的被观察者     */    public <T> Observable<T> tObservable(Class<T> EventType) {        return bus.ofType(EventType);    }    /***     *  * 根据传递的code和 eventType 类型返回特定类型(eventType)的 被观察者     * 对于注册了code为0，class为voidMessage的观察者，那么就接收不到code为0之外的voidMessage。     */    public <T> Observable<T> tObservable(final int code, final Class<T> eventType) {        return bus.ofType(RxBusBaseMessage.class).filter(new Predicate<RxBusBaseMessage>() {            @Override            public boolean test(RxBusBaseMessage o) throws Exception {                return o.getCode() == code && eventType.isInstance(o.getObject());            }        }).map(new Function<RxBusBaseMessage, Object>() {            @Override            public Object apply(RxBusBaseMessage o) throws Exception {                return o.getObject();            }        }).cast(eventType);    }    /**     * 判断是否有订阅者     */    public boolean hasSubscribers() {        return bus.hasObservers();    }    /**     * 注销     */    public void unRegisterAll() {        bus.onComplete();    }}

调用：

1.发送数据：

 RxBus.getInstance().send(RxCodeConstants.JUMP_TYPE_TO_ONE,new RxBusBaseMessage());

接受数据：

RxBus.getInstance().tObservable(RxCodeConstants.JUMP_TYPE_TO_ONE, RxBusBaseMessage.class)                .subscribe(new Consumer<RxBusBaseMessage>() {                    @Override                    public void accept(RxBusBaseMessage rxBusBaseMessage) throws Exception {                        Log.d(TAG, "accept: ");                        mBinding.include.vpContent.setCurrentItem(1);                    }                });

基于Rxjava

Step1：

compile 'io.reactivex:rxjava:1.1.0'compile 'io.reactivex:rxandroid:1.1.0'

Step2：

package com.example.jingbin.cloudreader.http.rx;import rx.Observable;import rx.functions.Func1;import rx.subjects.PublishSubject;import rx.subjects.SerializedSubject;import rx.subjects.Subject;/** * Created by jingbin on 16/5/17. */public class RxBus {    /**     * 参考网址: http://hanhailong.com/2015/10/09/RxBus%E2%80%94%E9%80%9A%E8%BF%87RxJava%E6%9D%A5%E6%9B%BF%E6%8D%A2EventBus/     *          http://www.loongwind.com/archives/264.html     *          https://theseyears.gitbooks.io/android-architecture-journey/content/rxbus.html     */    private static volatile RxBus mDefaultInstance;    private RxBus() {    }    public static RxBus getDefault() {        if (mDefaultInstance == null) {            synchronized (RxBus.class) {                if (mDefaultInstance == null) {                    mDefaultInstance = new RxBus();                }            }        }        return mDefaultInstance;    }    private final Subject<Object, Object> _bus = new SerializedSubject<>(PublishSubject.create());    public void send(Object o) {        _bus.onNext(o);    }    public Observable<Object> toObservable() {        return _bus;    }    /**     * 根据传递的 eventType 类型返回特定类型(eventType)的 被观察者     * @param eventType 事件类型     * @param <T>     * @return     */    public <T> Observable<T> toObservable(Class<T> eventType) {        return _bus.ofType(eventType);    }    /**     * 提供了一个新的事件,根据code进行分发     * @param code 事件code     * @param o     */    public void post(int code, Object o){        _bus.onNext(new RxBusBaseMessage(code,o));    }    /**     * 根据传递的code和 eventType 类型返回特定类型(eventType)的 被观察者     * 对于注册了code为0，class为voidMessage的观察者，那么就接收不到code为0之外的voidMessage。     * @param code 事件code     * @param eventType 事件类型     * @param <T>     * @return     */    public <T> Observable<T> toObservable(final int code, final Class<T> eventType) {        return _bus.ofType(RxBusBaseMessage.class)                .filter(new Func1<RxBusBaseMessage,Boolean>() {                    @Override                    public Boolean call(RxBusBaseMessage o) {                        //过滤code和eventType都相同的事件                        return o.getCode() == code && eventType.isInstance(o.getObject());                    }                }).map(new Func1<RxBusBaseMessage,Object>() {                    @Override                    public Object call(RxBusBaseMessage o) {                        return o.getObject();                    }                }).cast(eventType);    }    /**     * 判断是否有订阅者     */    public boolean hasObservers() {        return _bus.hasObservers();    }}

发送数据：

RxBus.getDefault().post(RxCodeConstants.JUMP_TYPE_TO_ONE, new RxBusBaseMessage());

接收数据：

   RxBus.getDefault().toObservable(RxCodeConstants.JUMP_TYPE_TO_ONE, RxBusBaseMessage.class)                .subscribe(new Action1<RxBusBaseMessage>() {                    @Override                    public void call(RxBusBaseMessage integer) {                        mBinding.include.vpContent.setCurrentItem(1);                    }                });

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