java.lang.IllegalStateException: The specified child already has a parent

Issue

I am using fragments, when I instantiate a fragment the first time it it. but the second time I got this exception. I couldn't find the line where I got the error?

 04-04 08:51:54.320: E/AndroidRuntime(29713): FATAL EXCEPTION: main
    04-04 08:51:54.320: E/AndroidRuntime(29713): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.view.ViewGroup.addViewInner(ViewGroup.java:3013)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.view.ViewGroup.addView(ViewGroup.java:2902)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.view.ViewGroup.addView(ViewGroup.java:2859)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.view.ViewGroup.addView(ViewGroup.java:2839)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.support.v4.app.NoSaveStateFrameLayout.wrap(Unknown Source)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.support.v4.app.FragmentManagerImpl.moveToState(Unknown Source)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.support.v4.app.FragmentManagerImpl.moveToState(Unknown Source)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.support.v4.app.BackStackRecord.run(Unknown Source)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.support.v4.app.FragmentManagerImpl.execPendingActions(Unknown Source)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.support.v4.app.FragmentManagerImpl$1.run(Unknown Source)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.os.Handler.handleCallback(Handler.java:587)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.os.Handler.dispatchMessage(Handler.java:92)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.os.Looper.loop(Looper.java:132)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at android.app.ActivityThread.main(ActivityThread.java:4126)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at java.lang.reflect.Method.invokeNative(Native Method)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at java.lang.reflect.Method.invoke(Method.java:491)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
    04-04 08:51:54.320: E/AndroidRuntime(29713):    at dalvik.system.NativeStart.main(Native Method)

Here are what i do when i click on an element of my list fragment.

// If we are not currently showing a fragment for the new
 // position, we need to create and install a new one.
 RouteSearchFragment df = RouteSearchFragment.newInstance(index);

 // Execute a transaction, replacing any existing fragment
 // with this one inside the frame.
 FragmentTransaction ft = fragmentManager.beginTransaction();
 ft.replace(R.id.details_full, df);
 ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
 ft.commit();

The first time it is Ok, I click element2 from list, it's also ok; but when I return to element1 I got this bug.

Thanks every one!

Solution

When you override OnCreateView in your RouteSearchFragment class, do you have the

if(view != null) {
    return view; 
}

code segment?

If so, removing the return statement should solve your problem.

You can keep the code and return the view if you don't want to regenerate view data, and onDestroyView() method you remove this view from its parent like so:

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        if (view != null) {
            ViewGroup parent = (ViewGroup) view.getParent();
            if (parent != null) {
                parent.removeAllViews();
            }
        }
    }

Answered By - Medo