Implement read/write text stream to RttCall.

This change also:

1. Add simulator support of RTT request during call (always accept at this moment, will add random accept/decline in the future)
2. Fix bugs of putting RTT call in background and back to call

Bug: 67596257
Test: Simulator
PiperOrigin-RevId: 185920527
Change-Id: I51016fa6cf1ccc8a5a21335f9dacf286ae393706

2 files changed, 30 insertions, 3 deletions

diff --git a/java/com/android/incallui/rtt/impl/RttChatAdapter.java b/java/com/android/incallui/rtt/impl/RttChatAdapter.java
index 1ea7f31b1..69837188a 100644
--- a/java/com/android/incallui/rtt/impl/RttChatAdapter.java
+++ b/java/com/android/incallui/rtt/impl/RttChatAdapter.java
@@ -110,7 +110,17 @@ public class RttChatAdapter extends RecyclerView.Adapter<RttChatMessageViewHolde
       notifyItemInserted(lastIndexOfLocalMessage);
     } else {
       rttChatMessage.append(newMessage);
-      notifyItemChanged(lastIndexOfLocalMessage);
+      // Clear empty message bubble.
+      if (TextUtils.isEmpty(rttChatMessage.getContent())) {
+        rttMessages.remove(lastIndexOfLocalMessage);
+        notifyItemRemoved(lastIndexOfLocalMessage);
+        if (lastIndexOfRemoteMessage > lastIndexOfLocalMessage) {
+          lastIndexOfRemoteMessage -= 1;
+        }
+        lastIndexOfLocalMessage = -1;
+      } else {
+        notifyItemChanged(lastIndexOfLocalMessage);
+      }
     }
   }
 
diff --git a/java/com/android/incallui/rtt/impl/RttChatFragment.java b/java/com/android/incallui/rtt/impl/RttChatFragment.java
index c7ee2ff67..ba99b2bf6 100644
--- a/java/com/android/incallui/rtt/impl/RttChatFragment.java
+++ b/java/com/android/incallui/rtt/impl/RttChatFragment.java
@@ -132,7 +132,7 @@ public class RttChatFragment extends Fragment
         FragmentUtils.getParentUnsafe(this, RttCallScreenDelegateFactory.class)
             .newRttCallScreenDelegate(this);
 
-    rttCallScreenDelegate.initRttCallScreenDelegate(getContext(), this);
+    rttCallScreenDelegate.initRttCallScreenDelegate(this);
 
     inCallScreenDelegate.onInCallScreenDelegateInit(this);
     inCallScreenDelegate.onInCallScreenReady();
@@ -193,7 +193,24 @@ public class RttChatFragment extends Fragment
     if (isClearingInput) {
       return;
     }
-    adapter.addLocalMessage(RttChatMessage.getChangedString(s, start, before, count));
+    String messageToAppend = RttChatMessage.getChangedString(s, start, before, count);
+    if (!TextUtils.isEmpty(messageToAppend)) {
+      adapter.addLocalMessage(messageToAppend);
+      rttCallScreenDelegate.onLocalMessage(messageToAppend);
+    }
+  }
+
+  @Override
+  public void onRemoteMessage(String message) {
+    adapter.addRemoteMessage(message);
+  }
+
+  @Override
+  public void onDestroyView() {
+    super.onDestroyView();
+    LogUtil.enterBlock("RttChatFragment.onDestroyView");
+    inCallButtonUiDelegate.onInCallButtonUiUnready();
+    inCallScreenDelegate.onInCallScreenUnready();
   }
 
   @Override