Jetpack之livedatabBus源码解析

OkLiveDataBusJava

单例模式的 去掉粘性事件，Java版本

/**
 * 单例模式的 去掉粘性事件，Java版本
 */
public class  OKLiveDataBusJava {

    // 存放订阅者
    private Map<String, BusMutableLiveData<Object>> bus;
    private static OKLiveDataBusJava liveDataBus = new OKLiveDataBusJava();

    private OKLiveDataBusJava() {
        bus = new HashMap<>();
    }

    public static OKLiveDataBusJava getInstance() {
        return liveDataBus;
    }

    // 注册订阅者
    public synchronized  <T> BusMutableLiveData<T> with(String key, Class<T> type) {
        if (!bus.containsKey(key)) {
            bus.put(key, new BusMutableLiveData<>());
        }
        return (BusMutableLiveData<T>)  bus.get(key);
    }

    /*public  MutableLiveData with(String target, Class type) {
        if (!bus.containsKey(target)) {
            bus.put(target, new MutableLiveData<>());
        }
        return (MutableLiveData) bus.get(target);
    }*/

    // 注册订阅者 重载
    /*public synchronized BusMutableLiveData