java - onActivityResult() 未使用两个 fragment 调用

Question

我有两个名为 HomeworkListFragment 和 HomeworkFragment 的 fragment 。

两者都继承自 -> fragment

Intent i = new Intent(getActivity(),HomeworkPagerActivity.class);
i.putExtra(HomeworkFragment.EXTRA_HOMEWORK_ID, homework.getId());
startActivityForResult(i,REQUEST_DELETE_HOMEWORK_ID);

这就是我从 MyListFragment 启动 MyFragment 的方式。

完成后，我想从 MyFragment 调用它:

Intent i = new Intent();
i.putExtra(EXTRA_DELETE_HOMEWORK_ID, mHomework.getId());
getActivity().setResult(Activity.RESULT_OK, i);
//Toast.makeText(getActivity(), "deleting?", Toast.LENGTH_SHORT).show();  
//getActivity().finish();
NavUtils.navigateUpFromSameTask(getActivity());

回到我已经实现的 MyListFragment:

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Toast.makeText(getActivity(), "HERE", Toast.LENGTH_SHORT).show();    
    if  (requestCode == REQUEST_DELETE_HOMEWORK_ID){
        String filename = data.getStringExtra(HomeworkFragment.EXTRA_DELETE_HOMEWORK_ID);
        Toast.makeText(getActivity(), "ID: "+filename, Toast.LENGTH_SHORT).show();    
    }
}

但是，这个方法永远不会被调用!

我已在 list 中声明了它们:

<activity
        android:name=".HomeworkListFragment"
        android:label="@string/app_name"
        android:launchMode="singleTop" >
        <meta-data android:name="android.support.PARENT_ACTIVITY"
            android:value=".HomeworkTabFragment"/>
    </activity>
    <activity
        android:name=".HomeworkFragment"
        android:label="@string/app_name" >
        <meta-data android:name="android.support.PARENT_ACTIVITY"
            android:value=".HomeworkListFragment"/>
    </activity>

是答案的一部分:NavUtils.navigateUpFromSameTask(getActivity());

MyListFragment 是否正在重新创建？

Answer 1

奇怪的是，我漏掉了这行:

super.onActivityResult(requestCode, resultCode, data);

我之前引用了错误的行，但无法弄清楚原因。现在我拥有了!