java 如何将列表视图放在android中的片段中？
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How to put a listview inside of a fragment in android?
提问by jacosta
I'm trying to put a simple listview inside my fragment. I'm getting an error when I run it as is. I wasn't expecting it to work with the current code I have, but I'm not sure where to go from here. Any help would be greatly appreciated!
我试图在我的片段中放入一个简单的列表视图。按原样运行时出现错误。我没想到它可以与我现有的代码一起使用，但我不确定从哪里开始。任何帮助将不胜感激！
My code:
我的代码：
public class Tab1Fragment extends ListFragment {
ListView listView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
LinearLayout theLayout = (LinearLayout) inflater.inflate(R.layout.tab1, container, false);
listView = (ListView)theLayout.findViewById(R.id.ListView01);
return theLayout;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Use an existing ListAdapter that will map an array
// of strings to TextViews
setListAdapter(new ArrayAdapter<String>(getActivity().getApplicationContext(),
android.R.layout.simple_list_item_1, mStrings));
getListView().setTextFilterEnabled(true);
}
private String[] mStrings = {
"Action", "Adventure", "Animation", "Children", "Comedy", "Documentary", "Drama",
"Foreign", "History", "Independent", "Romance", "Sci-Fi", "Television", "Thriller"
};
}
}
my runtime error:
我的运行时错误：
07-19 11:42:45.214: E/AndroidRuntime(19873): FATAL EXCEPTION: main
07-19 11:42:45.214: E/AndroidRuntime(19873): java.lang.RuntimeException: Unable to start activity ComponentInfo{package/package.TabActionBarActivity}: java.lang.IllegalStateException: Content view not yet created
07-19 11:42:45.214: E/AndroidRuntime(19873): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
07-19 11:42:45.214: E/AndroidRuntime(19873): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
07-19 11:42:45.214: E/AndroidRuntime(19873): at android.app.ActivityThread.access0(ActivityThread.java:123)
07-19 11:42:45.214: E/AndroidRuntime(19873): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
回答by trevor-e
You should try calling setListAdapter()in the onActivityCreated()method. This is because the Activity hasn't been completely created by the onCreate()method of a Fragment since the lifecycles of each are slightly different.
您应该尝试调用setListAdapter()该onActivityCreated()方法。这是因为 Activity 还没有完全由onCreate()Fragment的方法创建，因为每个的生命周期略有不同。
Here is a similar question: Android Fragment onCreateView vs. onActivityCreated
这是一个类似的问题：Android Fragment onCreateView vs. onActivityCreated
回答by azgolfer
A couple of problems in your fragment:
您的片段中有几个问题：
- If you are using ListFragment, then in your XML layout, you must have a ListView that has id of 'android.R.id.list'.
- Call your setListAdapter() method in onViewCreated() instead of onCreate(). This is because onCreate() is called first before onCreateView().
- 如果您使用的是 ListFragment，那么在您的 XML 布局中，您必须有一个 ID 为“android.R.id.list”的 ListView。
- 在 onViewCreated() 而不是 onCreate() 中调用 setListAdapter() 方法。这是因为 onCreate() 在 onCreateView() 之前先被调用。
