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i changed the fragment and function to androidx and it did work. Overview Guides Reference Samples Design & Quality. i was using the old app compact library instead of androidx library. Platform Android Studio Google Play Jetpack Kotlin Docs Games. The life cycle is well documented by google.

Here is my code : FragmentManager fragmentManager=getActivity().getFragmentManager() įragmentTransaction fragmentTransaction=fragmentManager.beginTransaction() įragmentTransaction.replace(R.id.profile_f, new UProfileFragment()) //My second Fragment | & | home_layout is frame layoutįragmentTransaction.addToBackStack(null) Īnd Here is my android studio screen error Screenshot :Įdit : Thank you for your answers this problem was due to androidx library and old android library's code mix up. Fragments are used to wrap functionality into an own reusable UI element. Please can some one explain and solve this error in simpler way. I also tired with this android fragment transaction doc but didn't understand. Purchase the fully updated Android Studio Chipmunk Kotlin Edition of. Refer to Android How to Create/Start a New Project in Android Studio. Overview Guides Reference Samples Design & Quality. You are reading a sample chapter from the Android Studio 3.0 / Android 8 Edition book. Fragment Lifecycle in Android ViewModel in Android Architecture Components Steps to implement the communication between fragments Step 1: Create an empty activity project Create an empty activity Android Studio project, and select Kotlin as the programming language.

I tried as This answer and I google it everywhere done the same but not worked for me. Platform Android Studio Google Play Jetpack Kotlin Docs Games. I tried to open my second fragment from my 1st fragment but that giving me error.