Handle ActivityNotFoundException in launchCustomChromeTab

Catch ActivityNotFoundException when launching a Chrome Custom Tab on
devices without a browser installed. Show a Snackbar instead of crashing.

Also moves LocalSnackbarHostState from feature/bookmarks/impl to
core/designsystem so all modules can access it (resolves existing TODO).

Fixes #1068

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

@@ -65,6 +65,7 @@ import androidx.navigation3.runtime.NavKey
 import androidx.navigation3.runtime.entryProvider
 import androidx.navigation3.ui.NavDisplay
 import com.google.samples.apps.nowinandroid.R
+import com.google.samples.apps.nowinandroid.core.designsystem.component.LocalSnackbarHostState
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaBackground
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaGradientBackground
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaNavigationSuiteScaffold
@@ -74,7 +75,6 @@ import com.google.samples.apps.nowinandroid.core.designsystem.theme.GradientColo
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.LocalGradientColors
 import com.google.samples.apps.nowinandroid.core.navigation.Navigator
 import com.google.samples.apps.nowinandroid.core.navigation.toEntries
-import com.google.samples.apps.nowinandroid.feature.bookmarks.impl.navigation.LocalSnackbarHostState
 import com.google.samples.apps.nowinandroid.feature.bookmarks.impl.navigation.bookmarksEntry
 import com.google.samples.apps.nowinandroid.feature.foryou.api.navigation.ForYouNavKey
 import com.google.samples.apps.nowinandroid.feature.foryou.impl.navigation.forYouEntry

app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/SnackbarInsetsScreenshotTests.kt

@@ -65,9 +65,9 @@ import com.google.samples.apps.nowinandroid.core.data.repository.UserNewsResourc
 import com.google.samples.apps.nowinandroid.core.data.test.repository.FakeUserDataRepository
 import com.google.samples.apps.nowinandroid.core.data.util.NetworkMonitor
 import com.google.samples.apps.nowinandroid.core.data.util.TimeZoneMonitor
+import com.google.samples.apps.nowinandroid.core.designsystem.component.LocalSnackbarHostState
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.NiaTheme
 import com.google.samples.apps.nowinandroid.core.testing.util.DefaultRoborazziOptions
-import com.google.samples.apps.nowinandroid.feature.bookmarks.impl.navigation.LocalSnackbarHostState
 import com.google.samples.apps.nowinandroid.uitesthiltmanifest.HiltComponentActivity
 import dagger.hilt.android.testing.HiltAndroidRule
 import dagger.hilt.android.testing.HiltAndroidTest

app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/SnackbarScreenshotTests.kt

@@ -38,9 +38,9 @@ import com.google.samples.apps.nowinandroid.core.data.repository.UserNewsResourc
 import com.google.samples.apps.nowinandroid.core.data.test.repository.FakeUserDataRepository
 import com.google.samples.apps.nowinandroid.core.data.util.NetworkMonitor
 import com.google.samples.apps.nowinandroid.core.data.util.TimeZoneMonitor
+import com.google.samples.apps.nowinandroid.core.designsystem.component.LocalSnackbarHostState
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.NiaTheme
 import com.google.samples.apps.nowinandroid.core.testing.util.DefaultRoborazziOptions
-import com.google.samples.apps.nowinandroid.feature.bookmarks.impl.navigation.LocalSnackbarHostState
 import com.google.samples.apps.nowinandroid.uitesthiltmanifest.HiltComponentActivity
 import dagger.hilt.android.testing.HiltAndroidRule
 import dagger.hilt.android.testing.HiltAndroidTest

core/designsystem/src/main/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/component/Snackbar.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.samples.apps.nowinandroid.core.designsystem.component
+
+import androidx.compose.material3.SnackbarHostState
+import androidx.compose.runtime.compositionLocalOf
+
+val LocalSnackbarHostState = compositionLocalOf { SnackbarHostState() }

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

@@ -16,8 +16,10 @@
 
 package com.google.samples.apps.nowinandroid.core.ui
 
+import android.content.ActivityNotFoundException
 import android.content.Context
 import android.net.Uri
+import android.util.Log
 import androidx.annotation.ColorInt
 import androidx.browser.customtabs.CustomTabColorSchemeParams
 import androidx.browser.customtabs.CustomTabsIntent
@@ -29,16 +31,20 @@ import androidx.compose.foundation.lazy.staggeredgrid.StaggeredGridCells
 import androidx.compose.foundation.lazy.staggeredgrid.items
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Devices
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.tooling.preview.PreviewParameter
 import androidx.compose.ui.unit.dp
 import com.google.samples.apps.nowinandroid.core.analytics.LocalAnalyticsHelper
+import com.google.samples.apps.nowinandroid.core.designsystem.component.LocalSnackbarHostState
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.NiaTheme
 import com.google.samples.apps.nowinandroid.core.model.data.UserNewsResource
+import kotlinx.coroutines.launch
 
 /**
  * An extension on [LazyListScope] defining a feed with news resources.
@@ -62,6 +68,9 @@ fun LazyStaggeredGridScope.newsFeed(
                 val context = LocalContext.current
                 val analyticsHelper = LocalAnalyticsHelper.current
                 val backgroundColor = MaterialTheme.colorScheme.background.toArgb()
+                val snackbarHostState = LocalSnackbarHostState.current
+                val coroutineScope = rememberCoroutineScope()
+                val noBrowserMessage = stringResource(R.string.core_ui_no_browser_available)
 
                 NewsResourceCardExpanded(
                     userNewsResource = userNewsResource,
@@ -71,7 +80,11 @@ fun LazyStaggeredGridScope.newsFeed(
                         analyticsHelper.logNewsResourceOpened(
                             newsResourceId = userNewsResource.id,
                         )
-                        launchCustomChromeTab(context, Uri.parse(userNewsResource.url), backgroundColor)
+                        if (!launchCustomChromeTab(context, Uri.parse(userNewsResource.url), backgroundColor)) {
+                            coroutineScope.launch {
+                                snackbarHostState.showSnackbar(noBrowserMessage)
+                            }
+                        }
 
                         onNewsResourceViewed(userNewsResource.id)
                     },
@@ -92,14 +105,25 @@ fun LazyStaggeredGridScope.newsFeed(
     }
 }
 
-fun launchCustomChromeTab(context: Context, uri: Uri, @ColorInt toolbarColor: Int) {
+/**
+ * Launches a Chrome Custom Tab for the given [uri].
+ *
+ * @return `true` if the URL was launched successfully, `false` if no browser activity was found.
+ */
+fun launchCustomChromeTab(context: Context, uri: Uri, @ColorInt toolbarColor: Int): Boolean {
     val customTabBarColor = CustomTabColorSchemeParams.Builder()
         .setToolbarColor(toolbarColor).build()
     val customTabsIntent = CustomTabsIntent.Builder()
         .setDefaultColorSchemeParams(customTabBarColor)
         .build()
 
-    customTabsIntent.launchUrl(context, uri)
+    return try {
+        customTabsIntent.launchUrl(context, uri)
+        true
+    } catch (e: ActivityNotFoundException) {
+        Log.e("NewsFeed", "No browser activity found to handle URI: $uri", e)
+        false
+    }
 }
 
 /**

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

@@ -20,11 +20,15 @@ import android.net.Uri
 import androidx.compose.foundation.lazy.LazyListScope
 import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
 import com.google.samples.apps.nowinandroid.core.analytics.LocalAnalyticsHelper
+import com.google.samples.apps.nowinandroid.core.designsystem.component.LocalSnackbarHostState
 import com.google.samples.apps.nowinandroid.core.model.data.UserNewsResource
+import kotlinx.coroutines.launch
 
 /**
  * Extension function for displaying a [List] of [NewsResourceCardExpanded] backed by a list of
@@ -47,6 +51,9 @@ fun LazyListScope.userNewsResourceCardItems(
         val backgroundColor = MaterialTheme.colorScheme.background.toArgb()
         val context = LocalContext.current
         val analyticsHelper = LocalAnalyticsHelper.current
+        val snackbarHostState = LocalSnackbarHostState.current
+        val coroutineScope = rememberCoroutineScope()
+        val noBrowserMessage = stringResource(R.string.core_ui_no_browser_available)
 
         NewsResourceCardExpanded(
             userNewsResource = userNewsResource,
@@ -57,7 +64,11 @@ fun LazyListScope.userNewsResourceCardItems(
                 analyticsHelper.logNewsResourceOpened(
                     newsResourceId = userNewsResource.id,
                 )
-                launchCustomChromeTab(context, resourceUrl, backgroundColor)
+                if (!launchCustomChromeTab(context, resourceUrl, backgroundColor)) {
+                    coroutineScope.launch {
+                        snackbarHostState.showSnackbar(noBrowserMessage)
+                    }
+                }
                 onNewsResourceViewed(userNewsResource.id)
             },
             onTopicClick = onTopicClick,

core/ui/src/main/res/values/strings.xml

@@ -31,4 +31,5 @@
     <string name="core_ui_interests_card_unfollow_button_content_desc">Unfollow interest</string>
     <string name="core_ui_feed_sharing">Feed sharing</string>
     <string name="core_ui_feed_sharing_data">%1$s: %2$s</string>
+    <string name="core_ui_no_browser_available">No browser available to open link</string>
 </resources>

feature/bookmarks/impl/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/bookmarks/impl/navigation/BookmarksEntryProvider.kt

@@ -17,11 +17,10 @@
 package com.google.samples.apps.nowinandroid.feature.bookmarks.impl.navigation
 
 import androidx.compose.material3.SnackbarDuration.Short
-import androidx.compose.material3.SnackbarHostState
 import androidx.compose.material3.SnackbarResult.ActionPerformed
-import androidx.compose.runtime.compositionLocalOf
 import androidx.navigation3.runtime.EntryProviderScope
 import androidx.navigation3.runtime.NavKey
+import com.google.samples.apps.nowinandroid.core.designsystem.component.LocalSnackbarHostState
 import com.google.samples.apps.nowinandroid.core.navigation.Navigator
 import com.google.samples.apps.nowinandroid.feature.bookmarks.api.navigation.BookmarksNavKey
 import com.google.samples.apps.nowinandroid.feature.bookmarks.impl.BookmarksScreen
@@ -42,8 +41,3 @@ fun EntryProviderScope<NavKey>.bookmarksEntry(navigator: Navigator) {
         )
     }
 }
-
-// TODO: Why is this here?
-val LocalSnackbarHostState = compositionLocalOf<SnackbarHostState> {
-    error("SnackbarHostState state should be initialized at runtime")
-}

feature/foryou/impl/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/foryou/impl/ForYouScreen.kt

@@ -86,6 +86,7 @@ import com.google.accompanist.permissions.ExperimentalPermissionsApi
 import com.google.accompanist.permissions.PermissionStatus.Denied
 import com.google.accompanist.permissions.rememberPermissionState
 import com.google.samples.apps.nowinandroid.core.designsystem.component.DynamicAsyncImage
+import com.google.samples.apps.nowinandroid.core.designsystem.component.LocalSnackbarHostState
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaButton
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaIconToggleButton
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaOverlayLoadingWheel
@@ -104,6 +105,7 @@ import com.google.samples.apps.nowinandroid.core.ui.UserNewsResourcePreviewParam
 import com.google.samples.apps.nowinandroid.core.ui.launchCustomChromeTab
 import com.google.samples.apps.nowinandroid.core.ui.newsFeed
 import com.google.samples.apps.nowinandroid.feature.foryou.api.R
+import com.google.samples.apps.nowinandroid.core.ui.R as UiR
 
 @Composable
 fun ForYouScreen(
@@ -469,16 +471,21 @@ private fun DeepLinkEffect(
 ) {
     val context = LocalContext.current
     val backgroundColor = MaterialTheme.colorScheme.background.toArgb()
+    val snackbarHostState = LocalSnackbarHostState.current
+    val noBrowserMessage = stringResource(UiR.string.core_ui_no_browser_available)
 
     LaunchedEffect(userNewsResource) {
         if (userNewsResource == null) return@LaunchedEffect
         if (!userNewsResource.hasBeenViewed) onDeepLinkOpened(userNewsResource.id)
 
-        launchCustomChromeTab(
+        val launched = launchCustomChromeTab(
             context = context,
             uri = Uri.parse(userNewsResource.url),
             toolbarColor = backgroundColor,
         )
+        if (!launched) {
+            snackbarHostState.showSnackbar(noBrowserMessage)
+        }
     }
 }