Can not perform this action inside of onLoadFinished
android, android-fragments
Solution
This is a bug of android. To solve this, use a Handler to replace/add/call a Fragment inside of onLoadFinished like this:
final int WHAT = 1;
Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
if(msg.what == WHAT) changeFragment(fragmentToLoad);
}
};
handler.sendEmptyMessage(WHAT);
Problem
I'm creating a new sample android app with one activity and many fragments. At first i'm starting the "OverviewFragment" (my Dashboard) which should show some basic informations. My OverviewFragment loads the informations with an "AccountProvider" (ContentProvider). If the database is empty, the OverviewFragment should be replaces with my WelcomeFragment... Here is some code: ``` public class OverviewFragment extends BaseFragment implements LoaderManager.LoaderCallbacks { private static final int LOADER_ACCOUNTS = 10; private static final int LOADER_TRANSACTIONS = 20; @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); getLoaderManager().initLoader(LOADER_ACCOUNTS, null, this); //getLoaderManager().initLoader(LOADER_TRANSACTIONS, null, this); } @Override public Loader onCreateLoader(int id, Bundle args) { Uri uri = null; String[] projection = null; String selection = null; String[] selectionArgs = null; String sortOrder = null; switch (id) { case LOADER_ACCOUNTS: uri = WalletProvider.CONTENT_URI; projection = new String[]{DBHelper.ACC_ID, DBHelper.ACC_TITLE}; sortOrder = DBHelper.ACC_TITLE; break; } CursorLoader cl = new CursorLoader(getActivity(), uri, projection, selection, selectionArgs, sortOrder); return cl; } @Override public void onLoadFinished(Loader loader, Object data) { switch (loader.getId()) { case LOADER_ACCOUNTS: bindAccounts((Cursor) data); break; } } @Override public void onLoaderReset(Loader loader) { } private void bindAccounts(Cursor cursor) { boolean showCreateWallet = true; if (cursor != null && cursor.moveToFirst()) { showCreateWallet = false; } if (showCreateWallet) { listener.changeFragment(new WalletCreateFragment()); } } ``` and here my main activity ``` @Override public void changeFragment(Fragment fragmentToLoad) { FragmentManager fragmentManager = getSupportFragmentManager(); fragmentManager.beginTransaction() .replace(R.id.container, fragmentToLoad) .commit(); } ``` Now... if i'm starting my app with an empty database i get the error you see in the title.. I know that i should not change the fragment in the onLoadFinished function .... but where can i do it? :P Sorry for my english =)