Question

I’m struggling combining a tabbed ActionBar and fragments.

I’m using ActionBarSherlock to display three independent tabs, and my problem relates to the first tab exclusively. It’s supposed to display items (called “coupons”) in a combination of list and detail view. The other two tabs display different content and do not play a role here.

What I’m doing is the following:

• The main activity creates three fragments for three tabs
• Tab A (a list fragment) populates and renders its list
• For clicks on the list I wrote a callback in the main activity that receives the clicked item’s id and exchanges the list fragment with the detail fragment on the tab (at least its supposed to do so)
• In that callback I create the to-be-displayed detail fragment and try to replace the list fragment with it.

Unfortunately I dont get beyond:

java.lang.IllegalArgumentException: No view found for id 0x7f040027
for fragment CouponDetailFragment{44f4e310 #1 id=0x7f040027}

I attached the relevant snippets at the end of the question. Any help is highly appreciated.

These are the relevant snippets:

public class MyCouponActivity extends SherlockFragmentActivity implements CouponListFragment.Callbacks

List fragment:

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:name="foo.bar.CouponListFragment"
    android:id="@+id/coupon_list"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

Transaction for fragment exchange:

@Override
public void onItemSelected(final String id) {
    final Bundle arguments = new Bundle();
    arguments.putString(CouponDetailFragment.ARG_ITEM_ID, id);
    final CouponDetailFragment fragment = new CouponDetailFragment();
    fragment.setArguments(arguments);
    getSupportFragmentManager().beginTransaction().replace(R.id.coupon_list, fragment).commit();
}

Answer 1

If you define a fragment in XML, it is fixed and you can’t replace it with another fragment in a FragmentTransaction.

Your best bet would be to replace the <fragment /> with some sort of ViewGroup. Don’t forget then you’d have to use a FragmentTransaction to add a CouponListFragment in the onCreate(..) of your Activity.