当ListActivity完成的onActivityResult不会被调用 [英] onActivityResult not being called when ListActivity finishes

问题描述

在一个小的应用程序我工作，我需要能够从数据库表中选择一个记录。

In a small app I'm working on, I need to be able to select a record from a database table.

在为了做到这一点，我创建 ListActivity ， GameListScreen 的一个子类，其中显示的记录和重写 onListItemClick（）如下：

In order to do that, I've created a subclass of ListActivity, GameListScreen, which displays the records, and overridden onListItemClick() as follows:

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    Game g = (Game)getListView().getItemAtPosition(position);
    Intent intent = new Intent();
    intent.putExtra("id", g.getId());
    setResult(RESULT_OK, intent);
    finish();
}

然后，为了发动我的活动，我有这个在我的的MainMenu 活动;一个的onClick 处理程序的按钮：

Then, in order to launch my activity, I have this in my MainMenu activity; an onClick handler for a Button:

public void openGameClick(View view) {
    Intent intent = new Intent(this, GameListScreen.class);
    startActivityForResult(intent, -1);
}

和得到的结果，也是在的MainMenu 类：

and to get the result, also in the MainMenu class:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == Activity.RESULT_OK) {
        // result is handled here
    }
}

一切工作完全按照预期 - 在ListActivity开始，我可以看到我的记录，当我选择一个，onListItemClick正在运行 - 但的onActivityResult 是没有得到所谓的，我不知道为什么。在另一个项目中，我遵循相同的基本原则，并在那里工作。

Everything works exactly as expected - the ListActivity starts, I can see my records, and when I select one, onListItemClick is being run - but onActivityResult is not getting called, and I have no idea why. In another project, I follow the same basic principle, and it works there.

我缺少的是在这里吗？我敢肯定，这是一个简单的错误，但我不能发现它。

What am I missing here? I'm sure it's a simple mistake, but I can't spot it.

我上传我的项目的情况下，它帮助。我使用的是Android 2.2的测试，因为那是我的电话正在使用。

I've uploaded my project in case it helps. I'm using Android 2.2 to test, since that's what my phone is using.

推荐答案

也许这就是为什么

从的javadoc：

启动，而您希望的结果，当它完成了一个活动。当这个活动退出，你的onActivityResult（）方法将与给定的请求code调用。 是一个负的请求code是与调用startActivity（意向）（该活动不会推出一个子活动）。

Launch an activity for which you would like a result when it finished. When this activity exits, your onActivityResult() method will be called with the given requestCode. Using a negative requestCode is the same as calling startActivity(Intent) (the activity is not launched as a sub-activity).

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