这是例外
09-16 11:48:48.214: W/dalvikvm(3644): threadid=1: thread exiting with uncaught exception (group=0x415c3700)
09-16 11:48:48.214: E/AndroidRuntime(3644): FATAL EXCEPTION: main
09-16 11:48:48.214: E/AndroidRuntime(3644): java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
09-16 11:48:48.214: E/AndroidRuntime(3644): at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1343)
09-16 11:48:48.214: E/AndroidRuntime(3644): at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1354)
09-16 11:48:48.214: E/AndroidRuntime(3644): at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:595)
09-16 11:48:48.214: E/AndroidRuntime(3644): at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:574)
09-16 11:48:48.214: E/AndroidRuntime(3644): at com.smedilepaolo.newsfeed.SubscriptionsListActivity.apriAllUnreadItems(SubscriptionsListActivity.java:159)
09-16 11:48:48.214: E/AndroidRuntime(3644): at com.smedilepaolo.newsfeed.SubscriptionsListFragment$GetSubscriptionListTask.onPostExecute(SubscriptionsListFragment.java:466)
09-16 11:48:48.214: E/AndroidRuntime(3644): at com.smedilepaolo.newsfeed.SubscriptionsListFragment$GetSubscriptionListTask.onPostExecute(SubscriptionsListFragment.java:1)
09-16 11:48:48.214: E/AndroidRuntime(3644): at android.os.AsyncTask.finish(AsyncTask.java:631)
09-16 11:48:48.214: E/AndroidRuntime(3644): at android.os.AsyncTask.access$600(AsyncTask.java:177)
09-16 11:48:48.214: E/AndroidRuntime(3644): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
09-16 11:48:48.214: E/AndroidRuntime(3644): at android.os.Handler.dispatchMessage(Handler.java:99)
09-16 11:48:48.214: E/AndroidRuntime(3644): at android.os.Looper.loop(Looper.java:137)
09-16 11:48:48.214: E/AndroidRuntime(3644): at android.app.ActivityThread.main(ActivityThread.java:5103)
09-16 11:48:48.214: E/AndroidRuntime(3644): at java.lang.reflect.Method.invokeNative(Native Method)
09-16 11:48:48.214: E/AndroidRuntime(3644): at java.lang.reflect.Method.invoke(Method.java:525)
09-16 11:48:48.214: E/AndroidRuntime(3644): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-16 11:48:48.214: E/AndroidRuntime(3644): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-16 11:48:48.214: E/AndroidRuntime(3644): at dalvik.system.NativeStart.main(Native Method)
09-16 11:48:59.315: I/Process(3644): Sending signal. PID: 3644 SIG: 9
这是导致它的代码
public void apriAllUnreadItems(){
Log.d(TAG, "apriAllUnreadItems");
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
Fragment oldDetail = fm.findFragmentById(R.id.detailFragmentContainer);
Fragment newDetail;
isTablet = getResources().getBoolean(R.bool.isTablet);
if(isTablet) newDetail=(Fragment) NewsListFragment_Tablet.newInstance(0, 0);
else newDetail=(Fragment) NewsListFragment_Phone.newInstance(0, 0);
if (oldDetail != null) {
ft.remove(oldDetail);
}
ft.add(R.id.detailFragmentContainer, newDetail);
ft.commit();
}
* 编辑AsyncTask
/************************************************
* GetSubscriptionListTask
************************************************/
private class GetSubscriptionListTask extends AsyncTask<Void, Void, Void> {
boolean onlyUnread=true;
public GetSubscriptionListTask(boolean onlyUnread) {
super();
this.onlyUnread=onlyUnread;
}
ProgressDialog progress;
@Override
protected void onPreExecute() {
//Show progress Dialog here
super.onPreExecute();
// create ProgressDialog here ...
progress = new ProgressDialog(getActivity());
progress.setMessage("Downloading Subscriptions");
// set other progressbar attributes
progress.setCancelable (false);
progress.setIndeterminate (true);
progress.show();
}
@Override
protected Void doInBackground(Void... params) {
if(this.isCancelled()==false){
reader.getSubscriptions(this.onlyUnread);
}
return null;
}
@Override
protected void onPostExecute(Void v) {
/************************************************
* Subscriptions Adapter - ListView
************************************************/
// preparing list data
prepareListData();
listAdapter = new ExpandableListAdapter(getActivity(), listDataHeader, listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
// setting list adapter
expListView.setAdapter(listAdapter);
expListView.expandGroup(0);
expListView.expandGroup(1);
expListView.expandGroup(2);
mCallbacks.apriAllUnreadItems();
//Dismiss Progress Dialog here
progress.dismiss();
// Listview on child click listener
expListView.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
Toast.makeText(
getActivity(),
listDataHeader.get(groupPosition)
+ " : "
+ listDataChild.get(
listDataHeader.get(groupPosition)).get(
childPosition), Toast.LENGTH_SHORT)
.show();
final SubscriptionsArray element= listDataChild.
get(listDataHeader.get(groupPosition)).
get(childPosition);
if(setSourceAsReadToggle.isChecked()==true){
//Chiedo all'utente se vuole settare la sorgente che ha selezionato come letta
displayAlertDialog(element);
}
else{
//Carico News elemento selezionato
mCallbacks.onSubscriptionSelected(groupPosition, childPosition);
}
return false;
}
});
}
}
答案 0 :(得分：1)
使用commitAllowingStateLoss（）解决;而不是commit（）;
由于