Listview Can Appear In Activity But Can't Appear In Fragment

ListView can appear in Activity but can't appear in Fragment However I use the same code in Kotlin with Android Studio 3.0? And this is my fragment code: class testFrag : Fragment

Solution 1:

You should make a return statement after your initialization in your onCreateView().

You are using kotlin-android-extensions to get your view directly. If you use that way, you can get your LisView only after view created.

Your code should be like this.

overridefunonCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? {
 return inflater!!.inflate(R.layout.fragment_test, container, false)
}

overridefunonViewCreated(view: View?, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
    listOfMkabala .add ( MeetingDetails(" nour1", "ahmed1" , "aya1"))
    listOfMkabala .add ( MeetingDetails(" nour2", "ahmed2" , "aya2"))
    listOfMkabala .add ( MeetingDetails(" nour3", "ahmed3" , "aya3"))
    listOfMkabala .add ( MeetingDetails(" nour4", "ahmed4" , "aya4"))
    listOfMkabala .add ( MeetingDetails(" nour5", "ahmed5" , "aya5"))
    listOfMkabala .add ( MeetingDetails(" nour6", "ahmed6" , "aya6"))
    adapter = mo3dAdapter (context  ,listOfMkabala)
    tv1.adapter = adapter
}

onViewCreated() runs after the View has been created. So it ensures your view already created.

You have passed the same layout for your adapter too.

In your adapter code change the R.layout.fragment_test to your model layout.

var myView = inflator.inflate(R.layout.fragment_test, null)

Hope it helps:)

Solution 2:

You written code in onCreateView after return statement which we called dead code(code which is unreachable). In that manner you never set your adapter in ListView.

Follow 3 steps as a general approach -

1. Init all data in onCreate method. In your case addition of data in ArrayList will go there.

so that will look like -

overridefunonCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    listOfMkabala .add ( MeetingDetails(" nour1", "ahmed1" , "aya1"))
    listOfMkabala .add ( MeetingDetails(" nour2", "ahmed2" , "aya2"))
    listOfMkabala .add ( MeetingDetails(" nour3", "ahmed3" , "aya3"))
    listOfMkabala .add ( MeetingDetails(" nour4", "ahmed4" , "aya4"))
    listOfMkabala .add ( MeetingDetails(" nour5", "ahmed5" , "aya5"))
    listOfMkabala .add ( MeetingDetails(" nour6", "ahmed6" , "aya6"))
}

2. Only init your layout resource in onCreateView. Like this -

   overridefunonCreateView(inflater: LayoutInflater?, container: ViewGroup?, 
                         savedInstanceState: Bundle?): View? {
   
       return inflater!!.inflate(R.layout.fragment_test, container, false)
   }
   

3. Which is related to rendering data on UI, that should be done in onViewCreated method. In your case, it should like -

   overridefunonViewCreated(view: View?, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        adapter = mo3dAdapter (context  ,listOfMkabala)
        // Init your listview
        tv1 = view?.findViewById(R.id.your_listview_id);
        tv1.adapter = adapter
   }
   

Make sure you init tv1 and it should be ListView reference.