Putting initLoader in onCreate() causes onLoadFinished() be called twice. There is also another thread http://stackoverflow.com/questions/11293441/android-loadercallbacks-onloadfinished-called-twice. It suggest put initLoader in onCreate() in onResume(). It works but I do not know why.
2013/8/28 Greenhand <[email protected]> > Same. > > Although it is an old thread, I encounter the same issue, too. I find the > thread > http://stackoverflow.com/questions/11001475/listfragment-is-inflated-twice. > It says put initLoader in onCreate() according to Fragment lifecycle ( > http://developer.android.com/guide/topics/fundamentals/fragments.html#Creating). > I tried it. It works. Nonetheless, I am not sure if it is a correct way to > solve the issue. > > Ben於 2012年11月23日星期五UTC+8下午10時41分32秒寫道： > >> Same >> >> On Wednesday, June 27, 2012 4:53:47 PM UTC+3, szakalinhoPL wrote: >>> >>> Hello, >>> I noticed a strange situation when using Loader in Fragment (in Activity >>> works well). I init Loader in onActivityCreated() as suggested in >>> documentation (http://developer.android.com/** >>> guide/components/loaders.html<http://developer.android.com/guide/components/loaders.html>) >>> and after orientation change framework calls twice method LoaderCallbacks. >>> **OnLoadFinished but not in initLoader (probably beacause Fragment is >>> not in started state, but in docs there is information that I should be >>> prepared for this (http://developer.android.com/**reference/android/app/ >>> **LoaderManager.html#initLoader(**int, android.os.Bundle, >>> android.app.LoaderManager.**LoaderCallbacks<D>)<http://developer.android.com/reference/android/app/LoaderManager.html#initLoader(int,+android.os.Bundle,+android.app.LoaderManager.LoaderCallbacks%3CD%3E)> >>> but it never happens) . However if I call iniLoader in Fragment.onResume() >>> everything works as expected. The same issue is described here >>> https://groups.google.**com/forum/?fromgroups#!topic/** >>> android-developers/aA2vHYxSskU<https://groups.google.com/forum/?fromgroups#!topic/android-developers/aA2vHYxSskU> >>> **. It happens using support library as well. Anyone noticed this >>> situation? I wrote very simple application to test this issue, here is >>> sample code: >>> >>> >>> //Activity class >>> >>> package com.example; >>> >>> import android.app.Activity; >>> import android.app.LoaderManager; >>> import android.os.Bundle; >>> >>> public class MyActivity extends Activity >>> { >>> /** >>> * Called when the activity is first created. >>> */ >>> @Override >>> public void onCreate(Bundle savedInstanceState) >>> { >>> super.onCreate(**savedInstanceState); >>> setContentView(R.layout.main); >>> >>> LoaderManager.**enableDebugLogging(true); >>> if (savedInstanceState == null) >>> { >>> getFragmentManager().**beginTransaction().add(R.id.**container, >>> new TestFrag(), "asdf").commit(); >>> } >>> } >>> } >>> //Fragment class >>> >>> package com.example; >>> >>> import android.app.Fragment; >>> import android.app.LoaderManager; >>> import android.content.Loader; >>> import android.os.Bundle; >>> import android.util.Log; >>> >>> public class TestFrag extends Fragment >>> { >>> @Override >>> public void onActivityCreated(Bundle savedInstanceState) >>> { >>> super.onActivityCreated(**savedInstanceState); >>> LoaderManager.LoaderCallbacks c = new >>> LoaderManager.LoaderCallbacks(**) >>> { >>> @Override >>> public Loader onCreateLoader(int id, Bundle args) >>> { >>> return new Loader<Object>(getActivity()) >>> { >>> @Override >>> protected void onStartLoading() >>> { >>> Log.d("TAG", "onStartLoading " + this); >>> deliverResult(new Object()); >>> } >>> }; >>> } >>> >>> @Override >>> public void onLoadFinished(Loader loader, Object data) >>> { >>> //THIS IS CALLED TWICE >>> Log.d("TAG", "onLoadFinished " + data); >>> } >>> >>> @Override >>> public void onLoaderReset(Loader loader) >>> { >>> } >>> }; >>> getLoaderManager().initLoader(**100, null, c); >>> >>> } >>> >>> } >>> >>> -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > --- > You received this message because you are subscribed to a topic in the > Google Groups "Android Developers" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/android-developers/vc4-RUri9k8/unsubscribe > . > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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