Check if a fragment exists and reuse it

java android android-fragments fragment fragmentmanager
Usi Usi picture Usi Usi · Aug 29, 2014 · Viewed 13.2k times · Source

I'm using the following code to create a fragment everytime the user click on an item in a list view. But in this way the fragment is created at every user click. What I want is to reuse the old fragment (if it exists) and only reload its content (don't create a new one).

MagazineViewFragment fragment = new MagazineViewFragment();
fragment.openStream(itemSelected);

FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
        .replace(R.id.container,  fragment)
        .commit();

How can I do?

Answer

reVerse picture reVerse · Aug 29, 2014

There're multiple ways, probably the most easy one is to check if the current Fragment in your container is an instance of FragmentXYZ (in your case MagazineViewFragment).

Example

Fragment mFragment = getFragmentManager().findFragmentById(R.id.container);
if (mFragment instanceof MagazineViewFragment)
    return;

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