tutorial tweaks

Author: tschellenbach

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

@@ -46,6 +46,7 @@ class ChannelActivity : AppCompatActivity() {
         messageInputViewModel.bindView(binding.messageInputView, this)
 
         // Step 3 - Let the message input know when we open a thread
+        // Note: the .observe support was added in kotlin 1.4, upgrade kotlin to support this syntax
         messageListViewModel.mode.observe(this) { mode ->
             when (mode) {
                 is Thread -> messageInputViewModel.setActiveThread(mode.parentMessage)

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

@@ -27,12 +27,12 @@
         android:id="@+id/messageListView"
         android:layout_width="0dp"
         android:layout_height="0dp"
+        android:clipToPadding="false"
+        android:paddingBottom="16dp"
         app:layout_constraintBottom_toTopOf="@+id/messageInputView"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/typingHeaderView"
-        android:clipToPadding="false"
-        android:paddingBottom="16dp"
         android:background="#f3f5f8"
         app:streamMessageTextColorMine="#FFF"
         app:streamMessageBackgroundColorMine="#70af74"