CODEWITHSUNDEEP
androidandroid-fragmentsandroid-activityfragmentandroid-fragmentactivity
Jilberta
Jilberta

Reputation: 2866

Android Nested Fragments

I'm trying to implement nested fragments but I have a problem.

When I add 2 different fragments with two different tags ("tag1", "tag2") in a ChildFragmentManager of one fragment, everything seems to be ok.

But when I call getChildFragmentManager().findFragmentByTag on these tags, only the first fragment is returned. I'm getting null on the second one.

To add fragments I use:

PersonsImageFragment imf = new PersonsImageFragment(imgPreview, 1);
android.support.v4.app.FragmentTransaction transaction = frag.getChildFragmentManager().beginTransaction();
transaction.add(R.id.frame, imf, "tag1")
                        .addToBackStack(tagName)
                        .commit();
imf = new PersonsImageFragment(imgPreview, 2);
transaction.add(R.id.frame2, imf, "tag2")
                        .addToBackStack(tagName)
                        .commit();

Am I missing something ?

EDIT: 

    f = getChildFragmentManager().findFragmentByTag("tag1");
//    f.onActivityResult(requestCode, resultCode, data);
    f = getChildFragmentManager().findFragmentByTag("tag2");
 //   f.onActivityResult(requestCode, resultCode, data);

EDIT 2:

What I'm trying to do is that, I have ViewPager and in one of the fragments I have custom view, that is responsible for taking a picture and showing it in the ImageView. So the nested fragment is calling camera intent and in onActivityResult it is updating the ImageView. As you know there's a bug in Nested Fragments, I have to call manually the onActivityResult of the nested fragment from the Parent Fragment. So in Parent's onActivityResult I'm trying to get the nested fragment I need and call its onActivityResult.

EDIT 3:

As I said, I have Custom View, that is responsible for taking picture and showing it off. I have 3 Custom Views in the Parent Fragment Layout. And when the user clicks any of them, it should take a picture and preview it. If I add only 1 custom view to the parent fragment it works, but when I use 3 of them, the click event works on all of them, that mean that camera fragment is attached but I can't call onActivityResult on other two because I can't get the fragment that startedActivityForResult, it is null. So the problem, in my opinion, should be in adding nested fragments to transaction but I can't find it.

Upvotes: 1

Views: 1731

Answers (1)

Henrique
Henrique

Reputation: 5011

I can't really be sure since the source code is not 100% complete, but I think there a couple of things being mixed up.

For example, you're reusing the same PersonsImageFragment for both fragments and also the transaction. Try something like this:

PersonsImageFragment frag1 = new PersonsImageFragment(imgPreview, 1);
android.support.v4.app.FragmentTransaction transaction = frag1.getChildFragmentManager().beginTransaction();
transaction.add(R.id.frame, frag1, "tag1")
                        .addToBackStack(tagName)
                        .commit();

PersonsImageFragment frag2 = new PersonsImageFragment(imgPreview, 2);
android.support.v4.app.FragmentTransaction transaction2 = frag2.getChildFragmentManager().beginTransaction();
transaction2.add(R.id.frame2, frag2, "tag2")
                        .addToBackStack(tagName)
                        .commit();

Haven't tried it out so you might need to modify it a bit to compile, but you get the idea. Let me know if this works.

Upvotes: 3

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