kotlin tutorial tweaks

Author: tschellenbach

samplekotlin/src/main/java/com/example/chattutorial/ChannelActivity3.kt

@@ -78,19 +78,16 @@ class ChannelActivity3 : AppCompatActivity() {
 
         // Custom typing info header bar
         val nobodyTyping = "nobody is typing"
-        binding.typingHeader.text = nobodyTyping
-
-        // Asynchronously obtain a ChannelController
-        ChatDomain.instance().useCases.getChannelController(cid).enqueue {
-            val channelController = it.data()
-            // Get back to UI thread and observe typing users
-            runOnUiThread {
-                channelController.typing.observe(this) { users ->
-                    binding.typingHeader.text = when {
-                        users.isNotEmpty() -> users.joinToString(prefix = "typing: ") { user -> user.name }
-                        else -> nobodyTyping
-                    }
-                }
+        binding.typingHeaderView.text = nobodyTyping
+
+        // Obtain a ChannelController
+        val channelController = ChatDomain.instance().useCases.getChannelController(cid).execute().data()
+
+        // Observe typing users
+        channelController.typing.observe(this) { users ->
+            binding.typingHeaderView.text = when {
+                users.isNotEmpty() -> users.joinToString(prefix = "typing: ") { user -> user.name }
+                else -> nobodyTyping
             }
         }
     }

samplekotlin/src/main/java/com/example/chattutorial/ChannelActivity4.kt

@@ -81,7 +81,7 @@ class ChannelActivity4 : AppCompatActivity() {
 
         // Custom typing info header bar
         val nobodyTyping = "nobody is typing"
-        binding.typingHeader.text = nobodyTyping
+        binding.typingHeaderView.text = nobodyTyping
 
         val currentlyTyping = mutableSetOf<String>()
 
@@ -96,7 +96,7 @@ class ChannelActivity4 : AppCompatActivity() {
                     is TypingStopEvent -> currentlyTyping.remove(event.user.extraData["name"] as String)
                 }
 
-                binding.typingHeader.text = when {
+                binding.typingHeaderView.text = when {
                     currentlyTyping.isNotEmpty() -> currentlyTyping.joinToString(prefix = "typing: ")
                     else -> nobodyTyping
                 }

samplekotlin/src/main/res/layout/activity_channel_3.xml

@@ -14,7 +14,7 @@
         app:layout_constraintTop_toTopOf="parent" />
 
     <TextView
-        android:id="@+id/typingHeader"
+        android:id="@+id/typingHeaderView"
         android:layout_width="match_parent"
         android:layout_height="31dp"
         android:background="#CCCCCC"
@@ -30,7 +30,7 @@
         app:layout_constraintBottom_toTopOf="@+id/messageInputView"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/typingHeader"
+        app:layout_constraintTop_toBottomOf="@+id/typingHeaderView"
         android:clipToPadding="false"
         android:paddingBottom="16dp"
         android:background="#f3f5f8"

samplekotlin/src/main/res/layout/activity_channel_4.xml

@@ -14,7 +14,7 @@
         app:layout_constraintTop_toTopOf="parent" />
 
     <TextView
-        android:id="@+id/typingHeader"
+        android:id="@+id/typingHeaderView"
         android:layout_width="match_parent"
         android:layout_height="31dp"
         android:background="#CCCCCC"
@@ -30,7 +30,7 @@
         app:layout_constraintBottom_toTopOf="@+id/messageInputView"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/typingHeader"
+        app:layout_constraintTop_toBottomOf="@+id/typingHeaderView"
         android:clipToPadding="false"
         android:paddingBottom="16dp"
         android:background="#f3f5f8"
@@ -48,4 +48,4 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent" />
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>