# Navigation

1. Create a resource file which resource type is Navigation

2. Android studio will help us to add dependency

3. Plug this xml code to your layout file which host view

<fragment
        android:id="@+id/my_nav_host_fragment"
        android:name="androidx.navigation.fragment.NavHostFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:defaultNavHost="true"
        app:navGraph="@navigation/my_navigation" />

4. Go to my_navigation.xml press + button to add new destination

Add two destinations like this

Add an action from 1 to 2

Xml will like this

<navigation 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:id="@+id/my_navigation"
    app:startDestination="@id/blankFragment1">

    <fragment
        android:id="@+id/blankFragment1"
        android:name="com.tryusernavigatot.BlankFragment1"
        android:label="fragment_blank1"
        tools:layout="@layout/fragment_blank1" >
        <action
            android:id="@+id/action_blankFragment1_to_blankFragment2"
            app:destination="@id/blankFragment2" />
    </fragment>
    <fragment
        android:id="@+id/blankFragment2"
        android:name="com.tryusernavigatot.BlankFragment2"
        android:label="fragment_blank2"
        tools:layout="@layout/fragment_blank2" />
</navigation>

5. Now we got two fragment layout and kt file in project

6. Add a button in fragment_blank1.xml to trig changing view

<Button android:id="@+id/goNextBtn" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:text="Go to next view"/> 

7. Add this code in BlankFragment1.kt

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        
        goNextBtn.setOnClickListener {

            findNavController().navigate(R.id.action_blankFragment1_to_blankFragment2)
        }
    }