Question

I have the following code in an Activity that starts a dialog for a layout that contains a fragment.

...
case R.id.pick_resource:
        dialog = new Dialog(this);
        dialog.setContentView(R.layout.resource_picker);
        dialog.setCancelable(true);
        dialog.setTitle("Pick a resource");
        dialog.show();

This works very well the first time after application start, but when the dialog is quit and later called again, I get this stack trace:

08-10 10:47:33.990: ERROR/AndroidRuntime(26521): FATAL EXCEPTION: main
        android.view.InflateException: Binary XML file line #7: Error inflating class fragment
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:688)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:724)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:391)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:347)
        at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:224)
        at android.app.Dialog.setContentView(Dialog.java:449)
        at org.rhq.pocket.StartActivity.onOptionsItemSelected(StartActivity.java:118)
        at android.app.Activity.onMenuItemSelected(Activity.java:2390)
        at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:852)
        at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:153)
        at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:956)
        at com.android.internal.view.menu.ActionMenuView.invokeItem(ActionMenuView.java:174)
        at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:85)
        at android.view.View.performClick(View.java:3100)
        at android.view.View$PerformClick.run(View.java:11644)
        at android.os.Handler.handleCallback(Handler.java:587)
        at android.os.Handler.dispatchMessage(Handler.java:92)
        at android.os.Looper.loop(Looper.java:126)
        at android.app.ActivityThread.main(ActivityThread.java:3997)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:491)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
        at dalvik.system.NativeStart.main(Native Method)
        Caused by: java.lang.IllegalArgumentException: Binary XML file line #7: Duplicate id 0x7f090007, tag null, or parent id 0xffffffff with another fragment for org.rhq.pocket.ResourcePickerFragement
        at android.app.Activity.onCreateView(Activity.java:4089)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:664)
        ... 24 more

Any idea, what may cause this exception? Do I have to unload the fragment somehow?

Answer 1

Does the fragment in your layout have an android:id attribute?

I suspect this is because the fragment is instantiated each time your layout is inflated, the first time the ID isn’t being used, but the second time the FragmentManager still thinks your Fragment is alive, so the ID is considered a duplicate.

Try removing the android:id attribute from your fragment if it exists, or add a placeholder layout such as a framelayout and use a fragmenttransaction to dynamically add the fragment each time your dialog is created.