Check if a fragment exists and reuse it
13,667
Solution 1
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;
Solution 2
Add tag when you call your fragment from activity:
FragmentManager fm = getFragmentManager();
Fragment fragment = fm.findFragmentByTag( MagazineViewFragment.TAG);
if (fragment == null) {
MagazineViewFragment fragment = new MagazineViewFragment();
fragment.openStream(itemSelected);
getFragmentManager()
.beginTransaction()
.add(R.id.container, fragment, MagazineViewFragment.TAG)
.commit();
}
If you need only to update itemSelected - see broadcasts or listeners.
Author by
Usi Usi
Updated on June 16, 2022Comments
-
Usi Usi almost 2 years
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?