groovy
implementation 'androidx.navigation:navigation-fragment-ktx:2.3.0'
implementation 'androidx.navigation:navigation-ui-ktx:2.3.0'
<!-- nav_graph.xml -->
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:startDestination="@id/homeFragment">
<fragment
android:id="@+id/homeFragment"
android:name="com.example.app.HomeFragment"
android:label="HomeFragment">
<action
android:id="@+id/action_homeFragment_to_detailFragment"
app:destination="@id/detailFragment" />
</fragment>
<fragment
android:id="@+id/detailFragment"
android:name="com.example.app.DetailFragment"
android:label="DetailFragment">
<argument
android:name="itemId"
app:argType="integer" />
</fragment>
</navigation>
kotlin
// MainActivity.kt
class MainActivity : AppCompatActivity() {
private lateinit var navController: NavController
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val navHostFragment = supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
navController = navHostFragment.navController
}
}
kotlin
// HomeFragment.kt
class HomeFragment : Fragment() {
private lateinit var binding: FragmentHomeBinding
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
binding = FragmentHomeBinding.inflate(inflater, container, false)
return binding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
binding.button.setOnClickListener {
val action = HomeFragmentDirections.actionHomeFragmentToDetailFragment(itemId = 123)
findNavController().navigate(action)
}
}
}
