Android - show fragment within a dialog

Question

I'm developing an android app that uses fragments as the base of the navigation flow. In some point, i fell in a problem that I couldnt resolve.

All fragments extends from a base class which has some properties that the navigation manager needs, called NavigationFragment, which extends from Fragment.

Now, I need to show one of this fragments like a popup, on a Dialog.

I found the amazing class DialogFragment that does the trick, but the problem is that the fragment cannot extend from this because it already extends from NavigationFragment.

I dont want to make NavigationFragment a DialogFragment, because there are only a few of them that will be shown as a popup.

Do you know an alternative to this? like a Dialog that can contain a Fragment, or something else?

Thanks!

Answer 1

What you have come across is not really an issue at all. You should make NavigationFragment extend DialogFragment, and then only call setShowsDialog(true) in onCreate for those you want to show as a Dialog. From the helpDoc,

setShowsDialog

Controls whether this fragment should be shown in a dialog. If not set, no Dialog will be created in onActivityCreated(Bundle), and the fragment's view hierarchy will thus not be added to it. This allows you to instead use it as a normal fragment (embedded inside of its activity).

This is normally set for you based on whether the fragment is associated with a container view ID passed to FragmentTransaction.add(int, Fragment). If the fragment was added with a container, setShowsDialog will be initialized to false; otherwise, it will be true.

See Android fragment show as dialogfragment or usual fragment, or better yet, the official documentation (http://developer.android.com/reference/android/app/DialogFragment.html#DialogOrEmbed) for a more detailed explanation on how to utilize this function.