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    <p>If you're trying to pass that <code>myLong</code> value through the <code>Callbacks</code> interface to the <code>DetailsFragment</code> you're not doing it right. The idea of that callback is for someone to implement it and register itself as a listener so when the user clicks the list item that implementation is called(and not just have an empty implementation which will not do anything). You could leave the communication between the fragments for the activity which shows those fragments to manage. For example:</p> <pre><code>public class CustomerListFragment extends ListFragment { private Callbacks mCallbacks; public interface Callbacks { public void onItemSelected(String id); } @Override public void onAttach(Activity activity) { super.onAttach(activity); try { mCallbacks = (Callbacks) activity; } catch (ClassCastException ex) { Log.e(TAG, "Casting the activity as a Callbacks listener failed" + ex); mCallbacks = null; } } @Override public void onListItemClick(ListView listView, View view, int position, long id) { long myLong = values.get(position).getId(); if (mCallbacks != null) { mCallbacks.onItemSelected(myLong); } } // ... </code></pre> <p>And then in your activity which holds the two fragments:</p> <pre><code>public class MainActivity extends FragmentActivity implements CustomerListFragment.Callbacks { // ... public void onItemSelected(Long id) { Bundle arguments = new Bundle(); arguments.putLong(CustomerDetailFragment.ARG_ITEM_ID, id); CustomerDetailFragment fragment = new CustomerDetailFragment(); fragment.setArguments(arguments); getSupportFragmentManager().beginTransaction() .replace(R.id.customer_detail_container, fragment) .commit(); } //... </code></pre> <p>And then retrieve the id from the arguments passed to the <code>CustomerDetailFragment</code> :</p> <pre><code>long theId = -1; if (getArguments().containsKey(ARG_ITEM_ID)) { theId = getArguments().getLong(ARG_ITEM_ID)); } selectedCustomer = datasource.getCustomer(theId); </code></pre>
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    1. COI updated my code above and change onListItemClick to your sample code, but I still can see how to get the id to CustomerDetailFragment onCreate. My MainActivity extends FragmentActivity.
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      1. USKim HJ
    2. CO@KimHJ I've edited my answer. Also look at the `CustomerListFragment` class. There is no need to convert the id to string, just use a long value.
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    3. COI tried to add the procedure updateCustomerInfo(String Id) in CustomerDetailFragment but it crash on the line datasourse.open; I also noticed that I get two things in the id (the customers _id and another saying (id=830022855688)
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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