如何通过对象的活动？ [英] How to pass object to an activity?

问题描述

我有两个活动，NewTransferMyOwn.java和FromAccount.java

I have two activities, NewTransferMyOwn.java and FromAccount.java

当我从NewTransferMyOwn.java到FromAccount.java，我写code如下

When I go from NewTransferMyOwn.java to FromAccount.java, I do write code as following

Intent i = new Intent(NewTransferMyOwn.this, FromAccount.class);
startActivityForResult(i, FROM_ACCOUNT);

当我来自FromAccount.java到NewT​​ransferMyOwn.java回来的话，我想通过类的一个完整的对象的语句

When I do come back from FromAccount.java to NewTransferMyOwn.java, then I want to pass a complete object of class Statement

我不写code为

Statement st = ItemArray.get(arg2);//ItemArray is ArrayList<Statement>, arg2 is int
Intent intent = new Intent(FromAccount.this,NewTransferMyOwn.class).putExtra("myCustomerObj",st);

我得到的错误如下的putExtra，

I do get error as following on putExtra,

更改为getIntExtra

像我一样，有再铸日至INT，有什么问题在这里，我怎么可以通过Statement对象向回活性的研究？

as I do, there is again casting st to int, what is issue over here, how can I pass Statement object towards back to acitivity?

推荐答案

您还可以通过 Serializable接口实现自定义的类，并通过自定义对象，

You can also implement your custom class by Serializable and pass the custom Object,

public class MyCustomClass implements Serializable
{
  // getter and setters
}

再通过自定义对象的意图。

And then pass the Custom Object with the Intent.

intent.putExtra("myobj",customObj);

要取回对象

Custom custom = (Custom) data.getSerializableExtra("myobj");

更新：

要在您使用通过自定义对象的previous活动 startActivityForResult

To pass your custom Object to the previous Activity while you are using startActivityForResult

Intent data = new Intent();
Custom value = new Custom();
value.setName("StackOverflow");
data.putExtra("myobj", value);
setResult(Activity.RESULT_OK, data);
finish();

要检索的自定义对象上的previous活动

To retrieve the custom Object on the Previous Activity

if(requestCode == MyRequestCode){
     if(resultCode == Activity.RESULT_OK){
         Custom custom = (Custom) data.getSerializableExtra("myobj");
         Log.d("My data", custom.getName()) ;
         finish();
     }
 }

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