通过对象从一个活动到另一个最好的方法 [英] Best way to pass objects from one activity to another
问题描述
我看了一下全局静态方法中,我们创建一个类的静态字段可以在任何活动进行访问。是否有通过大型数据集如ArrayList或HashMaps这样任何其他方式? 我也看到有关Serializable接口,但不知道如何使用它。任何例如code是欢迎的......
意向意图=新的意图(getBaseContext(),NextActivity.class);
intent.putExtra(数组列表,新的ArrayList<字符串>());
如果您ArrayList中包含您自己创建,例如Friend.class另一个对象,你可以实现Friend.class与序列化,然后:
意向意图=新的意图(getBaseContext(),NextActivity.class);
intent.putExtra(好友列表,新的ArrayList&其中;朋友>());
和接受它NextActivity.class:
捆绑额外= getIntent()getExtras()。
如果(临时演员!= NULL){
ArrayList的<朋友>朋友= extras.getSerializable(好友列表);
}
好,而不是传递一个空的ArrayList,你必须把值到ArrayList中,然后通过它,但你的想法。
I have read about global static technique in which we create a class with static fields which can be accessed in any activity. Is there any other way to pass large data sets like ArrayList or HashMaps ? I have also read about Serializable but have no idea how to use it. Any example code is welcome...
Intent intent = new Intent(getBaseContext(), NextActivity.class);
intent.putExtra("arraylist", new ArrayList<String>());
If your ArrayList contains another Object that you have created yourself, for instance Friend.class, you can implement the Friend.class with Serializable and then:
Intent intent = new Intent(getBaseContext(), NextActivity.class);
intent.putExtra("friendlist", new ArrayList<Friend>());
And for receiving it on NextActivity.class:
Bundle extras = getIntent().getExtras();
if(extras != null){
ArrayList<Friend> friends = extras.getSerializable("friendlist");
}
Well, instead of passing an empty ArrayList, you'll have to put values into the ArrayList and then pass it, but you get the idea.
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