android.view.InflateException: Error inflating class fragment

Question

I got the following error:

02-13 12:37:05.015: E/AndroidRuntime(8766): FATAL EXCEPTION: main
02-13 12:37:05.015: E/AndroidRuntime(8766): android.view.InflateException: Binary XML file   line #9: Error inflating class fragment
02-13 12:37:05.015: E/AndroidRuntime(8766): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
...
02-13 12:37:05.015: E/AndroidRuntime(8766): Caused by: java.lang.IllegalArgumentException: Binary XML file line #9: Duplicate id 0x7f05005f, tag null, or parent id 0x0 with another fragment for com.handmark.pulltorefresh.extras.listfragment.PullToRefreshListFragment
02-13 12:37:05.015: E/AndroidRuntime(8766): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:285)
02-13 12:37:05.015: E/AndroidRuntime(8766): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
02-13 12:37:05.015: E/AndroidRuntime(8766): ... 27 more

I'm creating an android app with an actionbar sherlock with an horizontal swipe between the tabs. For each tab I have loaded a fragment and I have a problem in one of these. In this fragment I have a nested fragment, which is essential for the pull-to-refresh list. Hence, I have the following layout:

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/fragment_people_layout"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

<fragment
    android:id="@+id/frag_ptr_list"
    android:name="com.handmark.pulltorefresh.extras.listfragment.PullToRefreshListFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fastScrollEnabled="true"
    android:drawSelectorOnTop="false"
    android:divider="@android:color/transparent"
    android:layout_margin="10dp" />

<TextView
    android:id="@id/android:empty"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center"
    android:text="@string/footer_loading_data" />

</LinearLayout>

And the following snippet of code:

public void onActivityCreated(Bundle savedInstanceState)
{
    super.onActivityCreated(savedInstanceState);
    activity = getActivity();
    mPullRefreshListFragment = (PullToRefreshListFragment) 
    activity.getSupportFragmentManager().findFragmentById(R.id.frag_ptr_list);
    ....
}

The issue comes out when I'm swiping between the tabs, and when the fragment is redrawn.

Just to let you know, I'm using the Support Library v4.

Answer 1

fragments cannot hold other fragments.

but .....

With current versions of the Android Support package -- or native fragments on API Level 17 and higher -- you can nest fragments, by means of getChildFragmentManager(). Note that this means that you need to use the Android Support package version of fragments on API Levels 11-16, because even though there is a native version of fragments on those devices, that version does not have getChildFragmentManager().