Question

this question had been asked here numerous times, however I couldn’t find help in any of them. I’m writing an android application and seem to have a problem with creating tabs on the ActionBar. I’ve been looking for the problem for a couple of hours and can’t seem to find the solution, however I think I did find the source. I’ve even emptied the implementations just to get some results and build upon them but alas I didn’t find anything.

this is the creating of the tab fragment and insertion to the actionbar

    // put ActionBar to nav. mode
    ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    // init "YES" tab
    Fragment yesTabFragment = Fragment.instantiate(this, YesTabFragment.class.getName());
    FlowTabListener yesTabListener = new FlowTabListener(yesTabFragment);
    ActionBar.Tab yesTab = actionBar.newTab().setText("YES").setTabListener(yesTabListener);
    actionBar.addTab(yesTab);

this is the onCreateView method of the class

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
    _fragmentView =  inflater.inflate(R.layout.yes_fragment, container);    
}

and this is the fragment XML layout

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:orientation="vertical" >

    </LinearLayout>

as you can see, the implementations are empty, and i do not instantiate this fragment before this time (and not after) however I get this error:

E/AndroidRuntime(2995): FATAL EXCEPTION: main
E/AndroidRuntime(2995): java.lang.RuntimeException: Unable to start activity ComponentInfo{activities.MainActivity}:    
java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

I think it has something to do with the addition of the tab to the action bar since when I comment out the actionBar.addTab() the application does run (without the tabs obviously)

I would really like for a hint on how to sort this out.

Thanks a head guys

Answer 1

The second parameter of inflate() is the default parent:

_fragmentView =  inflater.inflate(R.layout.yes_fragment, container);

Change this line to:

_fragmentView =  inflater.inflate(R.layout.yes_fragment, null);