all about fragments

basicsOnFragments.md

Basics

• creating a fragment

demo - #1

MainFragment.kt

class MainFragment:Fragment(R.layout.fragment_main){
	override onViewCreated(view: View,savedInstancestate:Bundle?){
		super.onViewCreated(view,savedInstanceState)
	}
}

fragment_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:app="http://schemas.android.com/apk/res-auto"
	xmlns:tools="http://schemas.android.com/tools"
	android:layout_width="match_parent"
	android:layout_height="match_parent">
	
</androidx.constraintlayout.widget.ConstraintLayout>

activity_main.xml

<...ConstraintLayout
	..
	>
	<fragment
		android:name = ".MainFragment"
		..
		/>
</..ConstraintLayout>	

fragment lifecycle

Fragment is Created

----------Created-----------

1. Fragment is added
2. onAttach()
3. onCreate()
4. onCreateView()
5. onActivityCreated()

----------Started-----------

6. onStart()

----------Resumed-----------

7. onResume()

Fragment is active

----------Paused-----------

1. onPause()

----------Stopped-----------

2. onStop()

----------Destroyed-----------

3. onDestroyView()
4. onDestroy()
5. onDetach()

Fragment is destroyed

Fragments.md

Fragments

• creating a fragment
• using in jetpack navigations
• view pager