Get the current fragment object
Get the current fragment object
Question
In my main.xml I have
<FrameLayout
android:id="@+id/frameTitle"
android:padding="5dp"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:background="@drawable/title_bg">
<fragment
android:name="com.fragment.TitleFragment"
android:id="@+id/fragmentTag"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</FrameLayout>
And I'm setting fragment object like this
FragmentManager fragmentManager = activity.getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
Fragment newFragment = new FragmentType1();
fragmentTransaction.replace(R.id.frameTitle, casinodetailFragment, "fragmentTag");
// fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
It is setting different types of Fragment objects (FragmentType2,FragmentType3,...) at different time. Now at some point of time I need to identify which object is currently there.
In short I need to do something like this:
Fragment currentFragment = //what is the way to get current fragment object in FrameLayout R.id.frameTitle
I tried the following
TitleFragment titleFragmentById = (TitleFragment) fragmentManager.findFragmentById(R.id.frameTitle);
and
TitleFragment titleFragmentByTag = (TitleFragment) fragmentManager.findFragmentByTag("fragmentTag");
But both the objects (titleFragmentById and titleFragmentByTag ) are null
Did I miss something?
I'm using Compatibility Package, r3 and developing for API level 7.
findFragmentById() and findFragmentByTag() will work if we have set fragment using fragmentTransaction.replace or fragmentTransaction.add, but will return null if we have set the object at xml (like what I have done in my main.xml). I think I'm missing something in my XML files.
Accepted Answer
Now at some point of time I need to identify which object is currently there
Call findFragmentById() on FragmentManager and determine which fragment is in your R.id.frameTitle container.
Popular Answer
Try this,
Fragment currentFragment = getActivity().getFragmentManager().findFragmentById(R.id.fragment_container);
this will give u the current fragment, then you may compare it to the fragment class and do your stuffs.
if (currentFragment instanceof NameOfYourFragmentClass) {
Log.v(TAG, "find the current fragment");
}
Read more... Read less...
I think you can use onAttachFragment event may be useful to catch which fragment is active.
@Override
public void onAttachFragment(Fragment fragment) {
// TODO Auto-generated method stub
super.onAttachFragment(fragment);
Toast.makeText(getApplicationContext(), String.valueOf(fragment.getId()), Toast.LENGTH_SHORT).show();
}
I think you should do:
Fragment currentFragment = fragmentManager.findFragmentByTag("fragmentTag");
The reason is because you set the tag "fragmentTag" to the last fragment you have added (when you called replace).
You can get the list of the fragments and look to the last one.
FragmentManager fm = getSupportFragmentManager();
List<Fragment> fragments = fm.getFragments();
Fragment lastFragment = fragments.get(fragments.size() - 1);
But sometimes (when you navigate back) list size remains same but some of the last elements are null. So in the list I iterated to the last not null fragment and used it.
FragmentManager fm = getSupportFragmentManager();
if (fm != null) {
List<Fragment> fragments = fm.getFragments();
if (fragments != null) {
for(int i = fragments.size() - 1; i >= 0; i--){
Fragment fragment = fragments.get(i);
if(fragment != null) {
// found the current fragment
// if you want to check for specific fragment class
if(fragment instanceof YourFragmentClass) {
// do something
}
break;
}
}
}
}
This is the simplest solution and work for me.
1.) you add your fragment
ft.replace(R.id.container_layout, fragment_name, "fragment_tag").commit();
2.)
FragmentManager fragmentManager = getSupportFragmentManager();
Fragment currentFragment = fragmentManager.findFragmentById(R.id.container_layout);
if(currentFragment.getTag().equals("fragment_tag"))
{
//Do something
}
else
{
//Do something
}
It might be late but I hope it helps someone else, also @CommonsWare has posted the correct answer.
FragmentManager fm = getSupportFragmentManager();
Fragment fragment_byID = fm.findFragmentById(R.id.fragment_id);
//OR
Fragment fragment_byTag = fm.findFragmentByTag("fragment_tag");