haythem souissi haythem souissi - 6 months ago 66
Android Question

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

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!

Answer

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.