Add errorMessage implementation for custom tab launch error

app/src/main/kotlin/com/google/samples/apps/nowinandroid/navigation/NiaNavHost.kt

@@ -39,6 +39,7 @@ import com.google.samples.apps.nowinandroid.ui.interests2pane.interestsListDetai
 fun NiaNavHost(
     appState: NiaAppState,
     onShowSnackbar: suspend (String, String?) -> Boolean,
+    errorHandler: (String) -> Unit,
     modifier: Modifier = Modifier,
     startDestination: String = FOR_YOU_ROUTE,
 ) {
@@ -57,6 +58,7 @@ fun NiaNavHost(
             onBackClick = navController::popBackStack,
             onInterestsClick = { appState.navigateToTopLevelDestination(INTERESTS) },
             onTopicClick = navController::navigateToInterests,
+            errorHandler = errorHandler,
         )
         interestsListDetailScreen()
     }

app/src/main/kotlin/com/google/samples/apps/nowinandroid/ui/NiaApp.kt

@@ -232,6 +232,7 @@ internal fun NiaApp(
                                 duration = Short,
                             ) == ActionPerformed
                         },
+                        errorHandler = { message -> appState.addErrorMessage(message) }
                     )
                 }
             }

core/ui/src/main/kotlin/com/google/samples/apps/nowinandroid/core/ui/NewsFeed.kt

@@ -16,6 +16,7 @@
 
 package com.google.samples.apps.nowinandroid.core.ui
 
+import android.content.ActivityNotFoundException
 import android.content.Context
 import android.net.Uri
 import androidx.annotation.ColorInt
@@ -52,6 +53,7 @@ fun LazyStaggeredGridScope.newsFeed(
     onNewsResourceViewed: (String) -> Unit,
     onTopicClick: (String) -> Unit,
     onExpandedCardClick: () -> Unit = {},
+    onLaunchFailed: () -> Unit = {},
 ) {
     when (feedState) {
         NewsFeedUiState.Loading -> Unit
@@ -73,7 +75,7 @@ fun LazyStaggeredGridScope.newsFeed(
                         analyticsHelper.logNewsResourceOpened(
                             newsResourceId = userNewsResource.id,
                         )
-                        launchCustomChromeTab(context, Uri.parse(userNewsResource.url), backgroundColor)
+                        launchCustomChromeTab(context, Uri.parse(userNewsResource.url), backgroundColor, onLaunchFailed)
 
                         onNewsResourceViewed(userNewsResource.id)
                     },
@@ -94,14 +96,18 @@ fun LazyStaggeredGridScope.newsFeed(
     }
 }
 
-fun launchCustomChromeTab(context: Context, uri: Uri, @ColorInt toolbarColor: Int) {
+fun launchCustomChromeTab(context: Context, uri: Uri, @ColorInt toolbarColor: Int, onLaunchFailed: () -> Unit) {
     val customTabBarColor = CustomTabColorSchemeParams.Builder()
         .setToolbarColor(toolbarColor).build()
     val customTabsIntent = CustomTabsIntent.Builder()
         .setDefaultColorSchemeParams(customTabBarColor)
         .build()
 
+    try {
         customTabsIntent.launchUrl(context, uri)
+    } catch (e: ActivityNotFoundException) {
+        onLaunchFailed()
+    }
 }
 
 /**

core/ui/src/main/kotlin/com/google/samples/apps/nowinandroid/core/ui/NewsResourceCardList.kt

@@ -38,6 +38,7 @@ fun LazyListScope.userNewsResourceCardItems(
     onToggleBookmark: (item: UserNewsResource) -> Unit,
     onNewsResourceViewed: (String) -> Unit,
     onTopicClick: (String) -> Unit,
+    onLaunchFailed: () -> Unit = {},
     itemModifier: Modifier = Modifier,
 ) = items(
     items = items,
@@ -57,7 +58,7 @@ fun LazyListScope.userNewsResourceCardItems(
                 analyticsHelper.logNewsResourceOpened(
                     newsResourceId = userNewsResource.id,
                 )
-                launchCustomChromeTab(context, resourceUrl, backgroundColor)
+                launchCustomChromeTab(context, resourceUrl, backgroundColor, onLaunchFailed)
                 onNewsResourceViewed(userNewsResource.id)
             },
             onTopicClick = onTopicClick,

feature/search/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/search/SearchScreen.kt

@@ -101,10 +101,14 @@ internal fun SearchRoute(
     onTopicClick: (String) -> Unit,
     modifier: Modifier = Modifier,
     searchViewModel: SearchViewModel = hiltViewModel(),
+    errorHandler: (String) -> Unit,
 ) {
     val recentSearchQueriesUiState by searchViewModel.recentSearchQueriesUiState.collectAsStateWithLifecycle()
     val searchResultUiState by searchViewModel.searchResultUiState.collectAsStateWithLifecycle()
     val searchQuery by searchViewModel.searchQuery.collectAsStateWithLifecycle()
+
+    val launchFailedString = stringResource(id = searchR.string.feature_search_custom_tab_activity_not_found)
+
     SearchScreen(
         modifier = modifier,
         searchQuery = searchQuery,
@@ -119,6 +123,7 @@ internal fun SearchRoute(
         onBackClick = onBackClick,
         onInterestsClick = onInterestsClick,
         onTopicClick = onTopicClick,
+        onLaunchFailed =  { errorHandler(launchFailedString) },
     )
 }
 
@@ -137,6 +142,7 @@ internal fun SearchScreen(
     onBackClick: () -> Unit = {},
     onInterestsClick: () -> Unit = {},
     onTopicClick: (String) -> Unit = {},
+    onLaunchFailed: () -> Unit = {},
 ) {
     TrackScreenViewEvent(screenName = "Search")
     Column(modifier = modifier) {
@@ -193,6 +199,7 @@ internal fun SearchScreen(
                         onNewsResourcesCheckedChanged = onNewsResourcesCheckedChanged,
                         onNewsResourceViewed = onNewsResourceViewed,
                         onFollowButtonClick = onFollowButtonClick,
+                        onLaunchFailed = onLaunchFailed,
                     )
                 }
             }
@@ -287,6 +294,7 @@ private fun SearchResultBody(
     onNewsResourcesCheckedChanged: (String, Boolean) -> Unit,
     onNewsResourceViewed: (String) -> Unit,
     onFollowButtonClick: (String, Boolean) -> Unit,
+    onLaunchFailed: () -> Unit,
 ) {
     val state = rememberLazyStaggeredGridState()
     Box(
@@ -361,6 +369,9 @@ private fun SearchResultBody(
                     onExpandedCardClick = {
                         onSearchTriggered(searchQuery)
                     },
+                    onLaunchFailed = {
+                        onLaunchFailed()
+                    }
                 )
             }
         }

feature/search/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/search/navigation/SearchNavigation.kt

@@ -30,6 +30,7 @@ fun NavGraphBuilder.searchScreen(
     onBackClick: () -> Unit,
     onInterestsClick: () -> Unit,
     onTopicClick: (String) -> Unit,
+    errorHandler: (String) -> Unit,
 ) {
     // TODO: Handle back stack for each top-level destination. At the moment each top-level
     // destination may have own search screen's back stack.
@@ -38,6 +39,7 @@ fun NavGraphBuilder.searchScreen(
             onBackClick = onBackClick,
             onInterestsClick = onInterestsClick,
             onTopicClick = onTopicClick,
+            errorHandler = errorHandler
         )
     }
 }