List的浅拷贝和深拷贝

浅拷贝

1、遍历循环复制

List<Person> destList = new ArrayList<Person>(srcList.size());  
for(Person p : srcList){  
    destList.add(p);  
}

2、使用List实现类的构造方法

List<Person> destList = new ArrayList<Person>(srcList);

3、使用list.addAll()方法

List<Person> destList = new ArrayList<Person>();  
destList.addAll(srcList);

4、使用System.arraycopy()方法

Person[] srcPersons = srcList.toArray(new Person[0]);  
Person[] destPersons = new Person[srcPersons.length];  
System.arraycopy(srcPersons, 0, destPersons, 0, srcPersons.length);  

深拷贝

1.Collections.copy()方法

  final List<BottomBarAppBean> gridItems = mSglApps.getGridItems();
                final ArrayList<BottomBarAppBean> destItems = new ArrayList<>();
                Collections.addAll(destItems, new BottomBarAppBean[gridItems.size()]);
                Collections.copy(destItems, gridItems);

参考博客：

https://blog.youkuaiyun.com/never_tears/article/details/79067245