EventBus笔记--源码--注销

有了前面的源码阅读 , 注销其实我们自己不用看都知道是怎么回事了: 只需要在map集合中吧订阅者相关的数据移除掉就可以了 , 也就是要对那两个集合操作了.

EventBus -- 基本使用
EventBus源码 -- 注册
EventBus源码 -- 发送消息
EventBus源码 -- 注销

public synchronized void unregister(Object subscriber) {
        // 根据订阅者找出集合中与之相关的事件类型
        List<Class<?>> subscribedTypes = typesBySubscriber.get(subscriber);
        if (subscribedTypes != null) {
            // 移除记录
            for (Class<?> eventType : subscribedTypes) {
                unsubscribeByEventType(subscriber, eventType);
            }
             // 移除记录
            typesBySubscriber.remove(subscriber);
        } else {
            Log.w(TAG, "Subscriber to unregister was not registered before: " + subscriber.getClass());
        }
    }

得到订阅者之后 , 根据事件类型和订阅者解绑
unsubscribeByEventType(subscriber, eventType);

private void unsubscribeByEventType(Object subscriber, Class<?> eventType) {
        // 找到与事件类型相匹配的订阅方法
        List<Subscription> subscriptions = subscriptionsByEventType.get(eventType);
        if (subscriptions != null) {
            int size = subscriptions.size();
            for (int i = 0; i < size; i++) {
                Subscription subscription = subscriptions.get(i);
                // 将订阅者中的订阅方法移除
                if (subscription.subscriber == subscriber) {
                    subscription.active = false;
                    subscriptions.remove(i);
                    i--;
                    size--;
                }
            }
        }
    }

至此 , EventBus的注销结束.