startActivityForResult(Intent intent，int requestCode，Bundle options)如何获取额外的bundle选项? [英] startActivityForResult(Intent intent, int requestCode, Bundle options) how to retrieve the extra bundle option?

问题描述

根据Android文档

According to the Android documentation public void startActivityForResult (Intent intent, int requestCode, Bundle options).

我不知道如何检索我打算传递的额外捆绑选项.

I can not figure it out how to retrieve the extra bundle options that I am passing on the intent.

当我调用startActivityForResult方法时，我想传递一个带有数据的ArrayList作为附加包选项.

I want to pass an ArrayList with data as an extra bundle option when I am calling the startActivityForResult method.

代码示例:

ArrayList<String> list = new ArrayList<>();
        list.add("test1");
        list.add("test2");

        Bundle bundleOptions = new Bundle();
        bundleOptions.putStringArrayList("key", list);

startActivityForResult(intent, 10, bundleOptions);

检索数据后:

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)

Bundle extras = data.getExtras();

附加捆绑包不包含我尝试传递的附加捆绑包.我丢失了什么，我无法检索传递给该方法的额外捆绑包数据?

Bundle extras does not contain the extra bundle that I am trying to pass. What I am missing and I can not retrieve the extra Bundle data that I am passing to the method?

我也尝试了intent.putExtra("key", bundleOptions);，也尝试了intent.putExtra("key", list);，但均未成功，并调用了方法startActivityForResult(intent, 10);，但再次均未成功.

I also tried with intent.putExtra("key", bundleOptions);, also with intent.putExtra("key", list); but with no success either and calling the method startActivityForResult(intent, 10); but again with no success.

我确定我错过了有人知道如何实现这一目标吗?

I am sure that I am missing something does anybody know how to achieve this?

推荐答案

额外捆绑包不包含我要传递的额外捆绑包.

Bundle extras does not contain the extra bundle that I am trying to pass.

正确.

我想念的东西

What I am missing

如果您希望使用getExtras()检索值，请使用putExtras() 或单独的putExtra()方法.

If you wish to retrieve a value using getExtras(), use putExtras() or individual putExtra() methods.

我无法检索传递给该方法的额外捆绑软件数据?

I can not retrieve the extra Bundle data that I am passing to the method?

startActivity()/startActivityForResult()的第三个参数是将选项传递给Android本身，而不是将数据传递给另一个活动.

That third parameter to startActivity()/startActivityForResult() are to pass options to Android itself, not to pass data to another activity.

我也尝试过... intent.putExtra("key"，list);但也没有成功

I also tried with... intent.putExtra("key", list); but with no success either

通常，这可行.例如，此示例应用自Android 1.0开始就可以使用.启动器活动使用putExtra()添加额外的字符串；其他活动使用getStringExtra()来获取值.

In general, that works. For example, this sample app has worked since Android 1.0. The launcher activity uses putExtra() to add a string extra; the other activity uses getStringExtra() to get the value.

如果您在使用putExtra()时仍然遇到问题，请发布一个单独的堆栈溢出问题，在其中提供用于设置和检索多余内容的代码，以及对症状的详细说明.

If you have continued problems using putExtra(), post a separate Stack Overflow question, where you supply your code for setting and retrieving the extra, along with a detailed description of your symptoms.

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