自定义RxBus，RxManager with RxJava2

来源：互联网发布：wto数据全球进出口额编辑：程序博客网时间：2024/06/03 19:27

现在查到的关于RxBus, RxManager的封装大部分是基于RxJava1的，从RxJava1到RxJava2的变化很大，很难平滑地过度，所以自己根据RxJava2重新封装下RxBus和RxManager

RxBus.java

public class RxBus {        private static RxBus instance;        /**         * ConcurrentHashMap: 线程安全集合         *   Subject 同时充当了Observer和Observable的角色         */        @SuppressWarnings("rawtypes")        private ConcurrentHashMap<Object, List<Subject>> subjectMapper = new ConcurrentHashMap<>();        public static synchronized RxBus getInstance() {            if(null == instance) {                instance = new RxBus();            }            return instance;        }        private RxBus() {        }        /**         * 订阅事件源         *         * @param observable         * @param consumer         * @return         */        public RxBus onEvent(Observable<?> observable, Consumer<Object> consumer) {            observable.observeOn(AndroidSchedulers.mainThread())                    .subscribe(consumer, new Consumer<Throwable>() {                        @Override                        public void accept(Throwable throwable) throws Exception {                            throwable.printStackTrace();                        }                    });            return getInstance();        }        /**         * 注册事件源         *         * @param tag key         * @param <T>         * @return         */        @SuppressWarnings({"rawtypes"})        public <T> Observable<T> register(@NonNull Object tag) {            List<Subject> subjectList = subjectMapper.get(tag);            if(null == subjectList) {                subjectList = new ArrayList<>();                subjectMapper.put(tag, subjectList);            }            Subject<T> subject = PublishSubject.create();            subjectList.add(subject);            // LogUtil.log("register" + tag + " size:" + subjectList.size());            return subject;        }        /**         * 取消整个tag的监听         *         * @param tag key         */        @SuppressWarnings("rawtypes")        public void unregister(@NonNull Object tag) {            List<Subject> subjectList = subjectMapper.get(tag);            if(null != subjectList) {                subjectMapper.remove(tag);            }        }        /**         * 取消tag里某个observable的监听         *         * @param tag key         * @param observable 要删除的observable         * @return         */        @SuppressWarnings("rawtypes")        public RxBus unregister(@NonNull Object tag,                                @NonNull Observable<?> observable) {            if(null == observable) {                return getInstance();            }            List<Subject> subjectList = subjectMapper.get(tag);            if(null != subjectList) {                // 从subjectList中删去observable                subjectList.remove((Subject<?>) observable);                // 若此时subjectList为空则从subjectMapper中删去                if(isEmpty(subjectList)) {                    subjectMapper.remove(tag);                }            }            return getInstance();        }        /**         * 触发事件         *         * @param content         */        public void post(@NonNull Object content) {            post(content.getClass().getName(), content);        }        /**         * 触发事件         *         * @param tag key         * @param content         */        @SuppressWarnings({"unchecked", "rawtypes"})        public void post(@NonNull Object tag, @NonNull Object content) {            List<Subject> subjectList = subjectMapper.get(tag);            if(!isEmpty(subjectList)) {                for(Subject subject : subjectList) {                    subject.onNext(content);                }            }        }        /**         * 判断集合是否为空         *         * @param collection 集合         * @return         */        @SuppressWarnings("rawtypes")        public static boolean isEmpty(Collection<Subject> collection) {            return null == collection || collection.isEmpty();        }}

RxManager.java

public class RxManager {    public RxBus mRxBus = RxBus.getInstance();    /**     * 管理观察源     */    private Map<String, Observable<?>> mObservableMap = new HashMap<>();    /**     * 管理订阅者     */    private CompositeDisposable mCompositeSubscription = new CompositeDisposable();    public void on(String eventName, Consumer<Object> consumer) {        // 注册        Observable<?> mObservable = mRxBus.register(eventName);        mObservableMap.put(eventName, mObservable);        mCompositeSubscription                .add(mObservable.observeOn(AndroidSchedulers.mainThread())                        .subscribe(consumer, new Consumer<Throwable>() {                            @Override                            public void accept(Throwable throwable) throws Exception {                                throwable.printStackTrace();                            }                        }));    }    /**     * 添加订阅者到mCompositeSubscription     *     * @param m 要添加的订阅者     */    public void add(Disposable m) {        mCompositeSubscription.add(m);    }    /**     * 取消所有注册     */    public void clear() {        // 取消订阅        mCompositeSubscription.dispose();        for(Map.Entry<String, Observable<?>> entry : mObservableMap.entrySet()) {            // 取消注册            mRxBus.unregister(entry.getKey(), entry.getValue());        }    }    /**     * 触发事件     *     * @param tag     * @param content     */    public void post(Object tag, Object content) {        mRxBus.post(tag, content);    }}

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