LiveDataBus实现原理#用法详解#LiveData扩展

LiveDataBus实现原理#LiveData源码分析

一、liveDataBus简单实现

public class LiveDataBus {
    private final Map> mBus;

    private LiveDataBus() {
        mBus = new ArrayMap<>();
    }

    private static abstract class SingleHolder {
        private static final LiveDataBus DATA_BUS = new LiveDataBus();
    }

    public static LiveDataBus get() {
        return SingleHolder.DATA_BUS;
    }

    public  MutableLiveData getChannel(String target, Class type) {
        if (!mBus.containsKey(target)) {
            mBus.put(target, new MutableLiveData<>());
        }
        return (MutableLiveData) mBus.get(target);
    }

    public MutableLiveData