修正聊天时间显示问题

app/src/main/java/com/aiosman/riderpro/ui/chat/ChatScreen.kt

@@ -193,11 +193,10 @@ fun ChatScreen(userId: String) {
             reverseLayout = true,
             verticalArrangement = Arrangement.Top
         ) {
-            val chatList = viewModel.getDisplayChatList()
-            groupMessagesByTime(chatList, viewModel) // Pass viewModel to the function
+            val chatList = groupMessagesByTime(viewModel.getDisplayChatList(), viewModel)
             items(chatList.size, key = { index -> chatList[index].msgId }) { index ->
                 val item = chatList[index]
-                if (item.showTimestamp) {
+                if (item.showTimeDivider) {
                     val calendar = java.util.Calendar.getInstance()
                     calendar.timeInMillis = item.timestamp
                     Text(
@@ -258,6 +257,7 @@ fun ChatSelfItem(item: ChatItem) {
                                 textAlign = TextAlign.Start
                             )
                         }
+
                         V2TIMMessage.V2TIM_ELEM_TYPE_IMAGE -> {
                             CustomAsyncImage(
                                 imageUrl = item.imageList[1].url,
@@ -265,6 +265,7 @@ fun ChatSelfItem(item: ChatItem) {
                                 contentDescription = "image"
                             )
                         }
+
                         else -> {
                             Text(
                                 text = "Unsupported message type",
@@ -342,6 +343,7 @@ fun ChatOtherItem(item: ChatItem) {
                                 textAlign = TextAlign.Start
                             )
                         }
+
                         V2TIMMessage.V2TIM_ELEM_TYPE_IMAGE -> {
                             CustomAsyncImage(
                                 imageUrl = item.imageList[1].url,
@@ -349,6 +351,7 @@ fun ChatOtherItem(item: ChatItem) {
                                 contentDescription = "image"
                             )
                         }
+
                         else -> {
                             Text(
                                 text = "Unsupported message type",
@@ -485,7 +488,8 @@ fun ChatInput(
             tint = Color(0xffe0e0e0)
         )
         Spacer(modifier = Modifier.width(8.dp))
-        Crossfade(targetState = text.isNotEmpty(), animationSpec = tween(500),
+        Crossfade(
+            targetState = text.isNotEmpty(), animationSpec = tween(500),
             label = ""
         ) { isNotEmpty ->
             Icon(
@@ -505,20 +509,20 @@ fun ChatInput(
     }
 }
 
-fun groupMessagesByTime(chatList: List<ChatItem>, viewModel: ChatViewModel) {
-    if (chatList.isEmpty()) return
-
-    var lastTimestamp = chatList[0].timestamp // Use the first message's timestamp
-    viewModel.showTimestampMap[chatList.last().msgId] = true
-    Log.d("TimestampDebug", "Setting showTimestamp for ${chatList.last().msgId} to true")
-
-    for (i in 1 until chatList.size) { // Iterate in normal order
+fun groupMessagesByTime(chatList: List<ChatItem>, viewModel: ChatViewModel): List<ChatItem> {
+    for (i in chatList.indices) { // Iterate in normal order
+        if (i == 0) {
+            viewModel.showTimestampMap[chatList[i].msgId] = true
+            chatList[i].showTimeDivider = true
+            continue
+        }
         val currentMessage = chatList[i]
-        val timeDiff = currentMessage.timestamp - lastTimestamp
-
-        if (timeDiff > 60 * 1000) {
+        val timeDiff = currentMessage.timestamp - chatList[i - 1].timestamp
+        // 时间间隔大于 3 分钟，显示时间戳
+        if (-timeDiff > 3 * 60 * 1000) {
             viewModel.showTimestampMap[currentMessage.msgId] = true
-            lastTimestamp = currentMessage.timestamp
+            currentMessage.showTimeDivider = true
         }
     }
+    return chatList
 }

app/src/main/java/com/aiosman/riderpro/ui/chat/ChatViewModel.kt

@@ -42,7 +42,8 @@ data class ChatItem(
     val messageType : Int = 0,
     val textDisplay : String = "",
     val msgId: String, // Add this property
-    var showTimestamp: Boolean = false
+    var showTimestamp: Boolean = false,
+    var showTimeDivider:Boolean = false
 )
 
 class ChatViewModel(
@@ -140,7 +141,6 @@ class ChatViewModel(
                     )
                 }
                 return null
-
             }
 
             V2TIMMessage.V2TIM_ELEM_TYPE_TEXT -> {
@@ -292,9 +292,9 @@ class ChatViewModel(
             null,
             object : V2TIMValueCallback<List<V2TIMMessage>> {
                 override fun onSuccess(p0: List<V2TIMMessage>?) {
-                    chatData = (p0 ?: emptyList()).map {
+                    chatData = (p0 ?: emptyList()).mapNotNull {
                         convertToChatItem(it, context)
-                    }.filterNotNull()
+                    }
                     if ((p0?.size ?: 0) < 20) {
                         hasMore = false
                     }
@@ -317,5 +317,4 @@ class ChatViewModel(
         }
         return list
     }
-
 }