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POHow can I refresh my ListFragment when it returns to the layout from back stack?
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  1. POHow can I refresh my ListFragment when it returns to the layout from back stack?
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    copied!<p>First I should mention that I am using the ActionBarSherlock library for backwards compatibility. </p> <p>I have an activity which adds a <code>ListFragment</code> when it is first started. I have a custom <code>Loader</code> which I implemented and follows the <a href="http://developer.android.com/reference/android/content/AsyncTaskLoader.html" rel="noreferrer">AsnycTaskLoader example</a> very closely. My <code>ListFragment</code> implements the <code>LoaderCallbacks&lt;Cursor&gt;</code> interface. All the appropriate callback methods are called when the fragment is added (<code>onCreateLoader()</code> , <code>onLoaderFinished()</code> ) and when it is replaced (<code>onLoaderReset()</code> ). </p> <p>My <code>onActivityCreated(Bundle)</code> method looks like this:</p> <pre><code>@Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); mAccountsDbAdapter = new AccountsDbAdapter(getActivity().getApplicationContext()); setHasOptionsMenu(true); mCursorAdapter = new AccountsCursorAdapter(getActivity() .getApplicationContext(), R.layout.list_item_account, null, new String[] { DatabaseHelper.KEY_NAME }, new int[] { R.id.account_name }, 0); setListAdapter(mCursorAdapter); getLoaderManager().initLoader(0, null, this); } </code></pre> <p>Later on, the <code>ListFragment</code> is replaced with another Fragment B. When the user presses the back button, Fragment B is removed and the ListFragment is added again. However, the list is empty and only the <code>android:empty</code> elements are displayed and none of the LoaderCallback methods are called. I can use the debugger to determine that <code>getLoaderManager().initLoader(0, null, this);</code> is actually called, but nothing else. When I change it to <code>getLoaderManager().restartLoader(0, null, this);</code>, the callbacks get called, but still my list remains empty (although there is data, the view is not refreshed). </p> <p>How can I get my ListFragment to refresh itself when it is returned to the layout? Has anyone encountered this before, how did you fix it?</p> <p>FYI, here are my callback methods</p> <pre><code> @Override public Loader&lt;Cursor&gt; onCreateLoader(int id, Bundle args) { return new AccountsCursorLoader(this.getActivity() .getApplicationContext()); } @Override public void onLoadFinished(Loader&lt;Cursor&gt; loaderCursor, Cursor cursor) { mCursorAdapter.swapCursor(cursor); mCursorAdapter.notifyDataSetChanged(); } @Override public void onLoaderReset(Loader&lt;Cursor&gt; arg0) { mCursorAdapter.swapCursor(null); } </code></pre> <p>Some notes:</p> <ol> <li>I cannot use the <code>setListShown(true)</code> methods in the example because I get an <code>IllegalStateException</code> that it cannot be used with a custom content view.</li> <li>My <code>AccountsCursorAdapter</code> extends a <code>SimpleCursorAdapter</code> and modifies only the <code>bindView()</code> method.</li> </ol>
 

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