自定义eventbus 10多k

其实之前看过几种事件的分发，包括greenrobot的EventBus，还有rxjava写的事件订阅。前者是写法局限，事件使用太多容易混乱，后者是准备弃用rxjava，仅仅对于使用事件订阅来说太重，于是想着自己写个，满足不是太多的事件订阅。封装不是太多，只是提供一些思路，其实不是太复杂。简单的模仿了rxjava的事件订阅，因为习惯了。
先贴源码

package com.wj.eventbus.wjeventbus;import android.support.annotation.WorkerThread;import java.util.ArrayList;import java.util.Collections;import java.util.Comparator;import java.util.Iterator;import java.util.List;import java.util.Map;import java.util.Objects;import java.util.concurrent.ConcurrentHashMap;import static android.R.attr.tag;/** * 消息分发 * * @author Admin * @version 1.0 * @date 2017/6/15 */public class WjEventBus {    /**     * 单例     */    private static volatile WjEventBus wjEventBus;    /**     * 消息推送的集合     */    private ConcurrentHashMap<EventKey, Object> posts = new ConcurrentHashMap<>();    /**     * 订阅的集合     */    private ConcurrentHashMap<EventKey, Class<?>> subscribes = new ConcurrentHashMap<>();    /**     * 事件回调的集合     */    private ConcurrentHashMap<EventKey, EventLister> listener = new ConcurrentHashMap<>();    /**     * 粘性事件的分发暂时缓冲区     */    private ArrayList<PostObject> stickyEventListers = new ArrayList<>();    private int priority = 0;//优先级默认是0    public long id = 0;//id 递增    private int index = -1;//下标    public static WjEventBus getInit() {        if (wjEventBus == null) {            wjEventBus = new WjEventBus();        }        wjEventBus.id++;        return wjEventBus;    }    /**     * 订阅事件     * @param code     * @param o 事件类型     * @param eventListe     * @return     */    public WjEventBus subscribe(String code, Class<?> o, EventLister eventListe) {        EventKey eventKey = new EventKey(code, priority, id);        subscribes.put(eventKey, o);        listener.put(eventKey, eventListe);        return wjEventBus;    }    /**     * 订阅粘性事件     * @param code     * @param o     * @param eventListe     * @return     */    public WjEventBus subscribeNext(String code, Class<?> o, EventLister eventListe) {        EventKey eventKey = new EventKey(code, priority, id);        subscribes.put(eventKey, o);        listener.put(eventKey, eventListe);        Iterator iterator = posts.keySet().iterator();        while (iterator.hasNext()) {            EventKey aClass = (EventKey) iterator.next();            if (aClass.code.equals(code)) {                eventListe.postResult(o);                break;            }        }        return wjEventBus;    }    /**     * 订阅事件 带入优先级     *     * @param code     * @param priority   优先级     * @param o     * @param eventListe     * @return     */    public WjEventBus subscribe(String code, int priority, Class<?> o, EventLister eventListe) {        EventKey eventKey = new EventKey(code, priority, id);        subscribes.put(eventKey, o);        listener.put(eventKey, eventListe);        return wjEventBus;    }    /**     * 粘性事件订阅 带入优先级     *     * @param code     * @param priority   优先级     * @param o     * @param eventListe     * @return     */    @WorkerThread    public WjEventBus subscribeNext(String code, int priority, Class<?> o, EventLister eventLister) {        EventKey eventKey = new EventKey(code, priority, id);        subscribes.put(eventKey, o);        listener.put(eventKey, eventLister);        //存入缓存        stickyEventListers.add(new PostObject(priority, eventLister));        //排序        Collections.sort(stickyEventListers, new Comparator<PostObject>() {            @Override            public int compare(PostObject o1, PostObject o2) {                return o2.priority - o1.priority;            }        });        Iterator iterator = posts.keySet().iterator();        //处理事件        while (stickyEventListers.size() > 0 && index > -1) {            deStickyEvent(eventKey, iterator, code, o);            if (stickyEventListers.size() < 1) {                index = -1;                break;            }        }        return wjEventBus;    }    /**     * 推送消息     * 如果存在优先级就按照最大的推，不存在就全部推送。优先级默认是{@link priority}     *     * @param code     * @param o     */    public synchronized void post(String code, Object o) {        EventKey eventKey = new EventKey(code, priority, 0);        posts.put(eventKey, new Msg(code, o));        //处理事件        Iterator iterator = subscribes.keySet().iterator();        deEvent(eventKey, iterator, code, o);    }    /**     * 处理事件的分发     * 按照优先级从高到低的传递     *     * @param iterator     * @param code     */    private void deEvent(EventKey eventKey, Iterator iterator, String code, Object o) {        ArrayList<PostObject> eventListers = new ArrayList<>();//待发事件的集合        long id = 0;//如果有排序的广播就取得ID值        PostObject postObject;        while (iterator.hasNext()) {            EventKey aClass = (EventKey) iterator.next();            if (aClass.code.equals(code)) {                postObject = new PostObject();                postObject.priority = aClass.priority;                postObject.eventLister = listener.get(aClass);                eventListers.add(postObject);            }            if (aClass.code.equals(code)) {                id = aClass.id;            }        }        //排序        Collections.sort(eventListers, new Comparator<PostObject>() {            @Override            public int compare(PostObject o1, PostObject o2) {                return o2.priority - o1.priority;            }        });        for (int i = 0; i < eventListers.size(); i++) {            eventListers.get(i).eventLister.postResult(o);        }    }    /**     * 处理粘性事件的分发     * 只会取得最后一条广播     *     * @param iterator     * @param code     */    private void deStickyEvent(EventKey eventKey, Iterator iterator, String code, Object o) {        EventLister eventLister = null;//待发事件的集合        while (iterator.hasNext()) {            EventKey aClass = (EventKey) iterator.next();            if (aClass.code.equals(code)) {                eventLister = listener.get(aClass);                break;            }        }        if (eventLister != null) {            eventLister.postResult(o);        }    }    /**     * 移除某一个事件     *     * @param code 标识     */    public void remove(String tag) {        //移除订阅        Iterator iterator = subscribes.keySet().iterator();        while (iterator.hasNext()) {            EventKey aClass = (EventKey) iterator.next();            if (aClass.code.equals(tag)) {                subscribes.remove(aClass);            }        }        //移除推送消息        iterator = posts.keySet().iterator();        while (iterator.hasNext()) {            EventKey aClass = (EventKey) iterator.next();            if (aClass.code.equals(tag)) {                posts.remove(aClass);            }        }        //移除监听消息        iterator = listener.keySet().iterator();        while (iterator.hasNext()) {            EventKey aClass = (EventKey) iterator.next();            if (aClass.code.equals(tag)) {                listener.remove(aClass);            }        }    }    /**     * 移除某一个事件     * @param tag 标识     * @param priority 优先级     */    public void remove(String tag, int priority) {        //移除订阅        Iterator iterator = subscribes.keySet().iterator();        while (iterator.hasNext()) {            EventKey aClass = (EventKey) iterator.next();            if (aClass.code.equals(tag) && aClass.priority == priority) {                subscribes.remove(aClass);            }        }        //移除推送消息        iterator = posts.keySet().iterator();        while (iterator.hasNext()) {            EventKey aClass = (EventKey) iterator.next();            if (aClass.code.equals(tag) && aClass.priority == priority) {                posts.remove(aClass);            }        }        //移除监听消息        iterator = listener.keySet().iterator();        while (iterator.hasNext()) {            EventKey aClass = (EventKey) iterator.next();            if (aClass.code.equals(tag) && aClass.priority == priority) {                listener.remove(aClass);            }        }    }    /**     * 销毁整个事件的监听     */    public void destory() {        subscribes.clear();        posts.clear();        listener.clear();    }}

实现了订阅集合，推送的集合和事件的集合。
使用方法主要是 推送消息

WjEventBus.getInit().post("0","425");

接收消息

WjEventBus.getInit().subscribe("0",0, String.class, new EventLister() {            @Override            public void postResult(Object eventVaule) {                runOnUiThread(new Runnable() {                    @Override                    public void run() {                        System.out.println("优先级是0-----------");                    }                });            }        });

粘性注册

 WjEventBus.getInit().subscribeNext("0",3,String.class, new EventLister() {            @Override            public void postResult(final Object eventVaule) {                        System.out.println("--------3粘性动画"+eventVaule);            }        });

销毁整个注册 一般是在应用退出

 //销毁整个注册        WjEventBus.getInit().destory();

移除某一个

 WjEventBus.getInit().remove("1"); WjEventBus.getInit().remove("2",2);

具体详见WjEventBus demo