EventBus 撸代码

之前一直在用EventBus来做应用内的消息发送，但由于现在项目的开发环境不允许使用外网，因此很多第三方库都不能使用，因此自己学习并撸了一套低配的EventBus在此写下来记录一下。

话不多说直接上代码

EventBus主类，主要用于注册方法、发送数据。

/**
 * @author wilson
 * @since 2019年03月17日22:58:24
 */
public class EventBus {
    private final String TAG = getClass().getName();
    private static volatile EventBus instance;

    private HashMap> methodCache;

    private Handler handler;

    private ExecutorService cacheExecutorService;

    private EventBus() {
        methodCache = new HashMap<>();
        handler = new Handler();
        cacheExecutorService = Executors.newCachedThreadPool();
    }


    public static EventBus getDefault() {
        if (instance == null) {
            synchronized (EventBus.class) {
                if (instance == null) {
                    instance = new EventBus();
                }
            }
        }
        return instance;
    }


    /**
     * 注册需要监听的class
     *
     * @param object
     */
    public void regist(Object object) {
        synchronized (EventBus.class) {
            List list = methodCache.get(object);
            if (list == null) {
                list = findSubscribleMethods(object);
                methodCache.put(object, list);
            }
        }
    }

    /**
     * 将class内带有Subscribe注解的方法及参数添加到缓存集合中
     *
     * @param object
     * @return
     */
    private List findSubscribleMethods(Object object) {
        List list = new ArrayList<>();
        Class claz = object.getClass();
        Method[] declaredMethods = claz.getDeclaredMethods();
        while (claz != null) {
            String name = claz.getName();
            if (name.startsWith("java.") || name.startsWith("javax.") || name.startsWith("android.")) {
                break;
            }
            for (Method method : declaredMethods) {
                Subscribe annotation = method.getAnnotation(Subscribe.class);

                if (annotation != null) {
                    Class[] parameterTypes = method.getParameterTypes();
                    if (parameterTypes.length != 1) {
                        Log.e(TAG, "eventbus 只能处理一个参数");
                    }
                    ThreadModel threadModel = annotation.threadMode();

                    SubscribleMethod subscribleMethod = new SubscribleMethod(method, threadModel, parameterTypes[0]);
                    list.add(subscribleMethod);
                }
            }
            claz = claz.getSuperclass();
        }

        return list;
    }

    /**
     * 发送数据
     *
     * @param param
     */
    public void post(final Object param) {
        Set