No issue: Add Sentry breadcrumbs to ease crash investigations

app/src/main/java/org/mozilla/fenix/HomeActivity.kt

@@ -12,9 +12,13 @@ import android.view.View
 import androidx.annotation.IdRes
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.widget.Toolbar
+import androidx.navigation.NavController
 import androidx.navigation.fragment.NavHostFragment
 import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.NavigationUI
+import io.sentry.Sentry
+import io.sentry.event.Breadcrumb
+import io.sentry.event.BreadcrumbBuilder
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -28,6 +32,7 @@ import mozilla.components.support.base.feature.BackHandler
 import mozilla.components.support.ktx.kotlin.isUrl
 import mozilla.components.support.ktx.kotlin.toNormalizedUrl
 import mozilla.components.support.utils.SafeIntent
+import org.mozilla.fenix.components.isSentryEnabled
 import org.mozilla.fenix.components.metrics.Event
 import org.mozilla.fenix.ext.components
 import org.mozilla.fenix.ext.nav
@@ -55,10 +60,47 @@ open class HomeActivity : AppCompatActivity() {
 
     lateinit var browsingModeManager: BrowsingModeManager
 
+    private val onDestinationChangedListener = NavController.OnDestinationChangedListener { _, dest, _ ->
+        val fragmentName = resources.getResourceEntryName(dest.id)
+        Sentry.getContext().recordBreadcrumb(
+            BreadcrumbBuilder()
+                .setCategory("DestinationChanged")
+                .setMessage("Changing to fragment $fragmentName, isCustomTab: $isCustomTab")
+                .setLevel(Breadcrumb.Level.INFO)
+                .build()
+        )
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
         components.publicSuffixList.prefetch()
+        setupThemeAndBrowsingMode()
+
+        setContentView(R.layout.activity_home)
+
+        setupToolbarAndNavigation()
+
+        if (Settings.getInstance(this).isTelemetryEnabled && isSentryEnabled()) {
+            navHost.navController.addOnDestinationChangedListener(onDestinationChangedListener)
+        }
+
+        intent
+            ?.let { SafeIntent(it) }
+            ?.let {
+                when {
+                    isCustomTab -> Event.OpenedApp.Source.CUSTOM_TAB
+                    it.isLauncherIntent -> Event.OpenedApp.Source.APP_ICON
+                    it.action == Intent.ACTION_VIEW -> Event.OpenedApp.Source.LINK
+                    else -> null
+                }
+            }
+            ?.also { components.analytics.metrics.track(Event.OpenedApp(it)) }
+
+        handleOpenedFromExternalSourceIfNecessary(intent)
+    }
+
+    private fun setupThemeAndBrowsingMode() {
         browsingModeManager = createBrowsingModeManager()
         themeManager = createThemeManager(
             when (browsingModeManager.isPrivate) {
@@ -66,12 +108,11 @@ open class HomeActivity : AppCompatActivity() {
                 false -> ThemeManager.Theme.Normal
             }
         )
-
         setTheme(themeManager.currentTheme)
         ThemeManager.applyStatusBarTheme(window, themeManager, this)
+    }
 
-        setContentView(R.layout.activity_home)
-
+    private fun setupToolbarAndNavigation() {
         // Add ids to this that we don't want to have a toolbar back button
         val appBarConfiguration = AppBarConfiguration.Builder().build()
         val navigationToolbar = findViewById<Toolbar>(R.id.navigationToolbar)
@@ -81,24 +122,11 @@ open class HomeActivity : AppCompatActivity() {
             onBackPressed()
         }
         supportActionBar?.hide()
-
-        intent
-            ?.let { SafeIntent(it) }
-            ?.let {
-                when {
-                    isCustomTab -> Event.OpenedApp.Source.CUSTOM_TAB
-                    it.isLauncherIntent -> Event.OpenedApp.Source.APP_ICON
-                    it.action == Intent.ACTION_VIEW -> Event.OpenedApp.Source.LINK
-                    else -> null
-                }
-            }
-            ?.also { components.analytics.metrics.track(Event.OpenedApp(it)) }
-
-        handleOpenedFromExternalSourceIfNecessary(intent)
     }
 
     override fun onDestroy() {
         sessionObserver?.let { components.core.sessionManager.unregister(it) }
+        navHost.navController.removeOnDestinationChangedListener(onDestinationChangedListener)
         super.onDestroy()
     }
 

app/src/main/java/org/mozilla/fenix/components/Analytics.kt

@@ -34,7 +34,7 @@ class Analytics(
     val crashReporter: CrashReporter by lazy {
         val services = mutableListOf<CrashReporterService>()
 
-        if (!BuildConfig.SENTRY_TOKEN.isNullOrEmpty()) {
+        if (isSentryEnabled()) {
             val sentryService = SentryService(
                 context,
                 BuildConfig.SENTRY_TOKEN,
@@ -85,3 +85,5 @@ class Analytics(
         )
     }
 }
+
+fun isSentryEnabled() = !BuildConfig.SENTRY_TOKEN.isNullOrEmpty()