一切都运行良好.但经过我的应用程序的一些测试后.它崩溃了,在我的Logcat中我看到这个“内容视图尚未创建”经过一些谷歌搜索,我发现我应该将我的listadapter放入onActivityCreated.我的代码有点不同,我使用的是lazyadapter,所以我觉得我需要一些建议.请帮我.
public class AndroidFragment extends SherlockListFragment implements ActionBar.TabListener{
static final String URL = "https://xml.xml";
static final String KEY_SONG = "song";
static final String KEY_ID = "id";
static final String KEY_TITLE = "title";
static final String KEY_CAT_ARTIST = "artistcat";
static final String KEY_DURATION = "duration";
static final String KEY_THUMB_URL = "thumb_url";
static final String KEY_BIG_URL = "big_url";
static final String KEY_CAT_URL = "cat_url";
static final String KEY_DESC = "cat_desc";
ArrayList<HashMap<String,String>> menuItems;
ListAdapter adapter;
Context appContext;
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState){
appContext = inflater.getContext().getApplicationContext();
new loadListView().execute();
return super.onCreateView(inflater,container,savedInstanceState);
}
public class loadListView extends AsyncTask<Integer,String,String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected String doInBackground(Integer... args) {
// updating UI from Background Thread
menuItems = new ArrayList<HashMap<String,String>>();
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL); // getting XML
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(KEY_SONG);
// looping through all item nodes <item>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String,String> map = new HashMap<String,String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(KEY_ID,parser.getValue(e,KEY_ID));
map.put(KEY_TITLE,KEY_TITLE));
map.put(KEY_CAT_ARTIST,KEY_CAT_ARTIST));
map.put(KEY_DURATION,KEY_DURATION));
map.put(KEY_THUMB_URL,KEY_THUMB_URL));
map.put(KEY_BIG_URL,KEY_BIG_URL));
map.put(KEY_CAT_URL,KEY_CAT_URL));
map.put(KEY_DESC,KEY_DESC));
// adding HashList to ArrayList
menuItems.add(map);
}
return null;
}
@Override
protected void onPostExecute(String args) {
if (getActivity() != null) {
adapter=new MainPageLazyAdapter(getActivity(),menuItems);
setListAdapter(adapter);
}
}
}
@Override
public void onTabSelected(Tab tab,FragmentTransaction ft) {
ft.add(android.R.id.content,this);
ft.attach(this);
}
@Override
public void onTabUnselected(Tab tab,FragmentTransaction ft) {
ft.detach(this);
}
@Override
public void onTabReselected(Tab tab,FragmentTransaction ft) {
}
}
我的LOGCAT：
10-08 17:29:32.946: E/AndroidRuntime(6376): FATAL EXCEPTION: main 10-08 17:29:32.946: E/AndroidRuntime(6376): java.lang.IllegalStateException: Content view not yet created 10-08 17:29:32.946: E/AndroidRuntime(6376): at android.support.v4.app.ListFragment.ensureList(ListFragment.java:328) 10-08 17:29:32.946: E/AndroidRuntime(6376): at android.support.v4.app.ListFragment.getListView(ListFragment.java:222) 10-08 17:29:32.946: E/AndroidRuntime(6376): at in.wptrafficanalyzer.actionbarsherlocknavtab.AndroidFragment$loadListView.onPostExecute(AndroidFragment.java:108) 10-08 17:29:32.946: E/AndroidRuntime(6376): at in.wptrafficanalyzer.actionbarsherlocknavtab.AndroidFragment$loadListView.onPostExecute(AndroidFragment.java:1) 10-08 17:29:32.946: E/AndroidRuntime(6376): at android.os.AsyncTask.finish(AsyncTask.java:602) 10-08 17:29:32.946: E/AndroidRuntime(6376): at android.os.AsyncTask.access$600(AsyncTask.java:156) 10-08 17:29:32.946: E/AndroidRuntime(6376): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615) 10-08 17:29:32.946: E/AndroidRuntime(6376): at android.os.Handler.dispatchMessage(Handler.java:99) 10-08 17:29:32.946: E/AndroidRuntime(6376): at android.os.Looper.loop(Looper.java:137) 10-08 17:29:32.946: E/AndroidRuntime(6376): at android.app.ActivityThread.main(ActivityThread.java:4512) 10-08 17:29:32.946: E/AndroidRuntime(6376): at java.lang.reflect.Method.invokeNative(Native Method) 10-08 17:29:32.946: E/AndroidRuntime(6376): at java.lang.reflect.Method.invoke(Method.java:511) 10-08 17:29:32.946: E/AndroidRuntime(6376): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:982) 10-08 17:29:32.946: E/AndroidRuntime(6376): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:749) 10-08 17:29:32.946: E/AndroidRuntime(6376): at dalvik.system.NativeStart.main(Native Method)
解决方法
我认为这应该可以解决你的问题.
@Override
public View onCreateView(LayoutInflater inflater,Bundle savedInstanceState){
View view = inflater.inflate(R.layout.layout,null);
return view //You must return your view here
}
@Override
public void onResume() {
//onResume happens after onStart and onActivityCreate
new loadListView().execute();
super.onResume() ;
}
