findViewById within fragment

Question

Is there any way to find a view by id within the scope of a fragment? I'm using a series of fragments to render a specialized list. The fragments are loaded from a layout, so their widgets all have the same ids.

I suppose I can figure out a way to give each widget a custom id during (or right after) creation. However, it would be a lot nicer if I could somehow limit the findViewById to the scope of the fragment.

Solution 1

private View myFragmentView;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
{
    myFragmentView = inflater.inflate(R.layout.myLayoutId, container, false);
    myView = myFragmentView.findViewById(R.id.myIdTag)

    return myFragmentView;
}

Solution 2

From inside the Fragment:

getView().findViewById(R.id.your_view);

From the enclosing Activity:

getFragmentManager().findFragmentByTag("YourFragmentTag").getView().findViewById(R.id.your_view);

or

getFragmentManager().findFragmentById(R.id.your_fragment).getView().findViewById(R.id.your_view);

Solution 3

You can do it by getView().findViewById()

Solution 4

Yes, there is a way, you can find it through rootView. First find the rootView of your fragment rootView=getView(); and then use rootView.findViewById(...);

View more solutions

Comments

[tolgap]

Add your code, it will be alot easier to answer.

[Sufian]

Possible duplicate of findViewById in Fragment

[dennisdrew]

MrFox, make sure you note that the view must be inflated. So, I would call inflater.inflate(v, container). That, or you could do MCeley's first suggestion, but make sure this is done in onActivityCreated so the View has been inflated and such. Otherwise, if you do it in onCreateView with no inflated view, you'll get a null pointer.

[chris-tulip]

Sorry! I totally missed that since I just pulled from some code that I had up and the inflate was in the super my bad

[StackOverflowed]

Sometimes getView() is null, so then what would you do?

[Michael Celey]

getView() is only null before onCreateView() is called by the fragment. At that point there is no view to be found using findViewById() because no view has been created.

[StackOverflowed]

@McCeley If getView() is called after the Fragment has been detached, does it also return null? I'm just curious as to when getView() call of a Fragment returns null.

[Michael Celey]

When a fragment is detached getView() should also return null. getView() will only return a non-null value after onCreateView and before onDestroyView. You can see the full lifecycle here

[Spinner]

I can't see any reference to the variable v other than in the return statement. Is this a typo, and if so what variable should it be?

[chris-tulip]

this is a typo, v should be myFragmentView. Will change now