如何发送的ArrayList＆LT;对象＆gt;从一个活动到第二项活动？ [英] How to send ArrayList<object> from one activity to second activity?

问题描述

我想从一个活动到次活动通过的ArrayList objArrayList，并希望得到那里。我创建一个简单的类中有四个数组列表。我米创建该类的对象，并通过传递数组列表中添加参数调用这个类的方法。之后，余米将在objArrayList该类对象。   如何传递objArrayList从一个活动到第二个活动，并接受它呢？

I want to pass "ArrayList objArrayList" from one activity to second activity and want to receive there. I am creating a simple class in that there are four arraylist. I m creating object of that class and calling method of that class by passing parameters to be added in arraylist. After that I m adding that class object in objArrayList. HOw can I pass objArrayList from one activity to second activity and receive it there?

谢谢， Vishakha。

Thanks, Vishakha.

推荐答案

第一上下文（可以是活动/服务等）

您有几种选择：

1）使用包从的的 http://developer.android.com/reference/android/content/Intent.html相对=nofollow>意图：

1) Use the Bundle from the Intent:

Intent mIntent = new Intent(this, Example.class);
Bundle extras = mIntent.getExtras();
extras.putString(key, value);  

2）创建一个新的捆绑

2) Create a new Bundle

Intent mIntent = new Intent(this, Example.class);
Bundle mBundle = new Bundle();
mBundle.extras.putString(key, value);
mIntent.putExtras(mBundle);

3）使用<一个href="http://developer.android.com/reference/android/content/Intent.html#putExtra%28java.lang.String,%20java.lang.String%5b%5d%29"相对=nofollow> putExtra（）的意向快捷方式

Intent mIntent = new Intent(this, Example.class);
mIntent.putExtra(key, value);

新上下文（可以是活动/服务等）

Intent myIntent = getIntent(); // this getter is just for example purpose, can differ
if (myIntent !=null && myIntent.getExtras()!=null)
     String value = myIntent.getExtras().getString(key);
}

注意：捆绑有得与放的方法对所有的基本类型，parcelables的，和Serializables。我只是用字符串示范的目的。的

NOTE: Bundles have "get" and "put" methods for all the primitive types, Parcelables, and Serializables. I just used Strings for demonstrational purposes.

您ArrayList类必须是Parcelable或序列化。所以，你应该继承它，因为我认为他们从原来的执行错过添加这些功能。

Your Arraylist class must be Parcelable or Serializable. So you should subclass it to add these functionalities as I think they miss from the original implementation.

再看看这些问题，他们会帮助你。 <一href="http://stackoverflow.com/questions/3136922/serialization-issue-with-sortedset-arrays-an-serializable">Serialization问题的SortedSet，数组的序列化

Then look into these other questions they will help you. Serialization issue with SortedSet, Arrays, an Serializable

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