NotifyHelp.java

package com.arialyy.frame.core;

import android.util.SparseArray;

import com.arialyy.frame.util.ReflectionUtil;

/**
 * Created by lyy on 2016/4/5.
 * 更新帮助类
 */
public class NotifyHelp {
    private static volatile NotifyHelp                                 INSTANCE    = null;
    private static final    Object                                     LOCK        = new Object();
    private                 SparseArray<SparseArray<OnNotifyCallback>> mNotifyObjs = new SparseArray<>();

    public interface OnNotifyCallback {
        public void onNotify(int action, Object obj);
    }

    public static NotifyHelp getInstance() {
        if (INSTANCE == null) {
            synchronized (LOCK) {
                INSTANCE = new NotifyHelp();
            }
        }
        return INSTANCE;
    }

    private NotifyHelp() {

    }

    public void addObj(int flag, OnNotifyCallback callback) {
        SparseArray<OnNotifyCallback> array = mNotifyObjs.get(flag);
        if (array == null) {
            array = new SparseArray<>();
        }
        array.put(callback.hashCode(), callback);
        mNotifyObjs.put(flag, array);
    }

    public void removeObj(int flag) {
        mNotifyObjs.delete(flag);
    }

    public void clear() {
        mNotifyObjs.clear();
    }

    public void update(int flag) {
        update(flag, -1, null);
    }

    public void update(int flag, int action) {
        update(flag, action, null);
    }

    public void update(int flag, int action, Object obj) {
        if (mNotifyObjs == null || mNotifyObjs.size() == 0) {
            return;
        }
        SparseArray<OnNotifyCallback> array = mNotifyObjs.get(flag);
        if (array == null || array.size() == 0) {
            return;
        }
        try {
            int[] keys = (int[]) ReflectionUtil.getField(SparseArray.class, "mKeys").get(array);
            for (int key : keys) {
                if (key == 0) {
                    continue;
                }
                OnNotifyCallback callback = array.get(key);
                if (callback != null) {
                    callback.onNotify(action, obj);
                }
            }
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}