For #311 - Uses Navigation component for opening the browser

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

@@ -10,24 +10,12 @@ import android.util.AttributeSet
 import android.view.View
 import androidx.appcompat.app.AppCompatActivity
 import mozilla.components.concept.engine.EngineView
-import mozilla.components.feature.intent.IntentProcessor
-import mozilla.components.support.utils.SafeIntent
-import org.mozilla.fenix.browser.BrowserFragment
 import org.mozilla.fenix.ext.components
 
 open class HomeActivity : AppCompatActivity() {
-    private var sessionId: String? = null
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_home)
-
-        if (savedInstanceState == null) {
-            sessionId = SafeIntent(intent).getStringExtra(IntentProcessor.ACTIVE_SESSION_ID)
-            supportFragmentManager.beginTransaction()
-                .replace(R.id.container, BrowserFragment.create(sessionId))
-                .commit()
-        }
     }
 
     override fun onCreateView(

app/src/main/java/org/mozilla/fenix/browser/BrowserFragment.kt

@@ -139,7 +139,6 @@ class BrowserFragment : Fragment(), BackHandler {
             requireComponents.toolbar.menuBuilder
         ) { requireActivity().finish() }
 
-
         lifecycle.addObservers(
             contextMenuFeature,
             downloadsFeature,
@@ -164,9 +163,11 @@ class BrowserFragment : Fragment(), BackHandler {
         lifecycle.removeObserver(sessionFeature)
     }
 
+    @SuppressWarnings("ReturnCount")
     override fun onBackPressed(): Boolean {
         if (findInPageIntegration.onBackPressed()) return true
         if (sessionFeature.handleBackPressed()) return true
+        if (customTabsToolbarFeature.onBackPressed()) return true
 
         // We'll want to improve this when we add multitasking
         requireComponents.core.sessionManager.remove()
@@ -190,15 +191,9 @@ class BrowserFragment : Fragment(), BackHandler {
     }
 
     companion object {
-        private const val SESSION_ID = "session_id"
+        const val SESSION_ID = "session_id"
         private const val REQUEST_CODE_DOWNLOAD_PERMISSIONS = 1
         private const val REQUEST_CODE_PROMPT_PERMISSIONS = 2
         private const val TOOLBAR_HEIGHT = 56f
-
-        fun create(sessionId: String? = null): BrowserFragment = BrowserFragment().apply {
-            arguments = Bundle().apply {
-                putString(SESSION_ID, sessionId)
-            }
-        }
     }
 }

app/src/main/java/org/mozilla/fenix/customtabs/CustomTabActivity.kt

@@ -4,6 +4,23 @@
 
 package org.mozilla.fenix.customtabs
 
+import android.os.Bundle
+import androidx.navigation.fragment.NavHostFragment
+import mozilla.components.feature.intent.IntentProcessor
+import mozilla.components.support.utils.SafeIntent
 import org.mozilla.fenix.HomeActivity
+import org.mozilla.fenix.R
+import org.mozilla.fenix.browser.BrowserFragment
 
-class CustomTabActivity : HomeActivity()
+class CustomTabActivity : HomeActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val sessionId = SafeIntent(intent).getStringExtra(IntentProcessor.ACTIVE_SESSION_ID)
+        val host = supportFragmentManager.findFragmentById(R.id.container) as NavHostFragment
+
+        host.navController.navigate(R.id.action_global_browser, Bundle().apply {
+            putString(BrowserFragment.SESSION_ID, sessionId)
+        })
+    }
+}

app/src/main/res/navigation/nav_graph.xml

@@ -5,6 +5,10 @@
     android:id="@+id/nav_graph"
     app:startDestination="@id/homeFragment">
 
+    <action
+        android:id="@+id/action_global_browser"
+        app:destination="@id/browserFragment" />
+
     <fragment
         android:id="@+id/homeFragment"
         android:name="org.mozilla.fenix.home.HomeFragment"