feat: Add NavigationViewDelegate

Adds NavigationViewDelegate to support NavigationView in the navigation sample app.

This change allows the navigation sample app to use NavigationView, which provides turn-by-turn navigation functionality.

The NavigationViewDelegate handles the lifecycle and rendering of the NavigationView, ensuring that it is properly integrated into the Jetpack Compose UI.

Uses a MarkerComposable to demonstrate the map really is a composable

Author: dkhawk

gradle.properties

@@ -17,7 +17,9 @@ org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
 android.useAndroidX=true
 # Automatically convert third-party libraries to use AndroidX
 # (not needed, since no requested libraries are pre-AndroidX)
-android.enableJetifier=false
+#android.enableJetifier=false
+# This is needed for the navigation SDK library.  It needs the recycler view.
+android.enableJetifier=true
 # Kotlin code style for this project: "official" or "obsolete":
 kotlin.code.style=official
 

navigation-app/build.gradle.kts

@@ -83,7 +83,6 @@ dependencies {
 
     implementation(libs.play.services.location)
 
-//    testImplementation(libs.robolectric)
     testImplementation(libs.androidx.core)
     testImplementation(libs.truth)
 
@@ -94,7 +93,6 @@ dependencies {
 
     // Accompanist permission helper
     implementation(libs.accompanist.permissions)
-
 }
 
 secrets {

navigation-app/src/main/java/com/google/maps/android/compose/navigation/MainActivity.kt

@@ -23,14 +23,15 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.google.accompanist.permissions.ExperimentalPermissionsApi
 import com.google.accompanist.permissions.rememberMultiplePermissionsState
 import com.google.android.gms.maps.model.LatLng
+import com.google.android.libraries.navigation.NavigationApi
 import com.google.maps.android.compose.navigation.ui.theme.AndroidmapscomposeTheme
 import kotlinx.coroutines.launch
 
 val defaultLocation = LatLng(39.9828503662161, -105.71835147137016)
 
 @OptIn(ExperimentalPermissionsApi::class)
 class MainActivity : ComponentActivity() {
-    private val myViewModel: MainViewModel by viewModels { MainViewModel.Factory }
+    private val myViewModel: NavigationViewModel by viewModels { NavigationViewModel.Factory }
 
     override fun onResume() {
         super.onResume()
@@ -40,6 +41,9 @@ class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
+
+        NavigationApi.getNavigator(this, myViewModel)
+
         setContent {
             val context = LocalContext.current
             val snackbarHostState by remember { mutableStateOf(SnackbarHostState()) }

navigation-app/src/main/java/com/google/maps/android/compose/navigation/MainViewModel.kt

@@ -1,18 +1,31 @@
 package com.google.maps.android.compose.navigation
 
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.unit.dp
 import com.google.android.gms.maps.CameraUpdateFactory
 import com.google.android.gms.maps.model.CameraPosition
 import com.google.android.gms.maps.model.LatLng
 import com.google.android.libraries.navigation.NavigationView
 import com.google.maps.android.compose.ComposeMapColorScheme
 import com.google.maps.android.compose.GoogleMap
+import com.google.maps.android.compose.MarkerComposable
 import com.google.maps.android.compose.navigation.components.MovableMarker
 import com.google.maps.android.compose.rememberCameraPositionState
+import com.google.maps.android.compose.rememberMarkerState
 
 @Composable
 fun NavigationScreen(
@@ -54,6 +67,25 @@ fun NavigationScreen(
                     title = "User location",
                 )
             }
+
+            MarkerComposable(
+                title = "Bigfoot",
+                 state = rememberMarkerState(position = LatLng(39.99932703674056, -105.28152457787887)),
+            ) {
+                Box(
+                    modifier = Modifier
+                        .width(48.dp)
+                        .height(48.dp)
+                        .clip(RoundedCornerShape(16.dp))
+                        .background(Color.Transparent),
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Image(
+                        painter = painterResource(R.drawable.bigfoot),
+                        contentDescription = ""
+                    )
+                }
+            }
         }
     }
-}
+}