Onloadfinished() Called Twice

I'm trying to figure out if I'm doing something wrong with respect to Loaders. I'm using the support library, and I have a Fragment which in onCreate() calls initLoader() setting i

Solution 1:

I had a similar problem and the cause was that I had initLoader and restartLoader in my code. Depending on user's action, my query could change, so I needed to restart my loader.

The solution was to use only restartLoader, even in onResume callback method replace initLoader with restartLoader.

Solution 2:

This is a rather old question, but for future readers I have an alternative solution. Basically what I ended up doing was restart the loader if it existed.

publicvoidonActivityCreated(Bundle savedInstanceState) {
...
       if(getLoaderManager().getLoader(Constants.LOADER_ID) == null) {
            getLoaderManager().initLoader(Constants.LOADER_ID, null, this);
        } else {
            getLoaderManager().restartLoader(Constants.LOADER_ID, null, this);
        }

...
}

This solved my issue with that on screen rotate the loader was triggered twice. One thing too note is that this is only needed for me on Android < 6 that I tested. Android 6 seem to not have this issue at all.

Solution 3:

I am experiencing same problem my self, with no good solution. It seems as bug in Android framework, here is similar thread in which proposed solution is to place initLoader() in onResume() - I have tried it and it works, on onLoadFinished() gets called only once: Android: LoaderCallbacks.OnLoadFinished called twice

Solution 4:

See my post at Android: LoaderCallbacks.OnLoadFinished called twice

I had a similar problem when restarting Fragments in a ViewPager. My solution is to remove the Loader once I'm finished with it (at the end of onLoadFinished) by calling

getLoaderManager().destroyLoader(LOADER_ID);

Hope it helps!

Solution 5:

It is looks like framework Loader wrong implementation/bug. 1. look at what I got from Log.v(LOG_TAG, ...) messages from every important method/callback after screen rotation:

...: .initLoader() 100...: onStartLoading()...: onLoadFinished()...: updateUi(); articles size=10...: loadInBackground()...: getInputStream() - HttpRequest...: onLoadFinished()...: updateUi(); articles size=10

2. As you can see everything after 'updateUi()' is no needed there.