ai

app/src/main/java/com/stand/standapp/ui/chat/components/ChatArea.kt

@@ -7,7 +7,6 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.foundation.text.selection.SelectionContainer
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Close
 import androidx.compose.material.icons.filled.Menu
@@ -29,42 +28,29 @@ fun ChatArea(
     onOpenDrawer: () -> Unit,
     onClose: () -> Unit,
     modifier: Modifier = Modifier,
-    onDrag: (Float, Float) -> Unit = { _, _ -> }, // 新增拖动回调，传递给顶层卡片进行位移
+    onDrag: (Float, Float) -> Unit = { _, _ -> },
-    onCancelStreaming: () -> Unit = {} // 👈 新增手动中断回调
+    onCancelStreaming: () -> Unit = {}
 ) {
     var inputText by remember { mutableStateOf("") }
-    
-    // 👈 声明滚动状态，默认对齐最下端布局！
     val listState = rememberLazyListState()
 
-    // 👈 完美破局第二点：动态计算位移，确保无论何时都完美对齐最底端，而非最上端对齐！
-    // 1. 切换会话、新开会话或发送新提问时，平滑滚动到最后一项的偏移量。
-    // 为了防止出现“只露出头部”的缺陷，我们直接使用 layoutInfo 高度差来实现精密的物理底部对齐！
     LaunchedEffect(messages.size) {
         if (messages.isNotEmpty()) {
-            val lastIndex = messages.size - 1
+            listState.scrollToItem(messages.size - 1, Int.MAX_VALUE)
-            // 首次滚动
-            listState.animateScrollToItem(lastIndex)
-            // 双重微调：确保高度变化后继续贴底
-            kotlinx.coroutines.delay(100)
-            listState.animateScrollToItem(lastIndex)
         }
     }
 
-    // 2. 核心大招：当 AI 处于 streaming 状态一字字输出时，打字机实时精准底部跟进！
-    // 我们不仅监听文字总长度，还设置极小延迟后高精度跟随，绝不出现卡在半空的尴尬。
     val isAnyStreaming = remember(messages) { messages.any { it.isStreaming } }
     if (isAnyStreaming) {
         val totalLength = messages.map { it.content.length }.sum()
         LaunchedEffect(totalLength) {
             if (messages.isNotEmpty()) {
-                listState.scrollToItem(messages.size - 1)
+                listState.scrollToItem(messages.size - 1, Int.MAX_VALUE)
             }
         }
     }
 
     Column(modifier = Modifier.fillMaxSize().background(Color.White)) {
-        // 顶部标题栏，通过手势侦测支持整卡拖拽！
         TopAppBar(
             title = { Text("AI 助手", style = MaterialTheme.typography.titleMedium) },
             navigationIcon = {
@@ -83,52 +69,47 @@ fun ChatArea(
                     onDragCancel = { },
                     onDrag = { change, dragAmount ->
                         change.consume()
-                        onDrag(dragAmount.x, dragAmount.y) // 拦截拖拽手势并触发回调位移
+                        onDrag(dragAmount.x, dragAmount.y)
                     }
                 )
             }
         )
 
-        // 消息列表（外层包裹 SelectionContainer 从而支持长按选择和自由复制！）
+        LazyColumn(
-        SelectionContainer(modifier = Modifier.weight(1f).fillMaxWidth()) {
+            state = listState,
-            LazyColumn(
+            modifier = Modifier.weight(1f).fillMaxWidth().padding(horizontal = 12.dp),
-                state = listState, // 绑定滚动状态
+            contentPadding = PaddingValues(vertical = 12.dp),
-                modifier = Modifier.fillMaxSize().padding(horizontal = 12.dp),
+            verticalArrangement = Arrangement.spacedBy(8.dp)
-                contentPadding = PaddingValues(vertical = 12.dp),
+        ) {
-                verticalArrangement = Arrangement.spacedBy(8.dp)
+            items(messages, key = { it.id }) { msg ->
-            ) {
+                val isUser = msg.role == ChatMessage.Role.USER
-                items(messages, key = { it.id }) { msg -> // 👈 为每个消息绑定唯一 key，提升打字机重绘性能，拒绝任何卡死！
+                Box(
-                    val isUser = msg.role == ChatMessage.Role.USER
+                    modifier = Modifier.fillMaxWidth(),
-                    Box(
+                    contentAlignment = if (isUser) Alignment.CenterEnd else Alignment.CenterStart
-                        modifier = Modifier.fillMaxWidth(),
+                ) {
-                        contentAlignment = if (isUser) Alignment.CenterEnd else Alignment.CenterStart
+                    Surface(
+                        shape = RoundedCornerShape(12.dp),
+                        color = if (isUser) Color(0xFF10B981) else Color(0xFFE5E7EB),
+                        contentColor = if (isUser) Color.White else Color.Black
                     ) {
-                        Surface(
+                        if (isUser) {
-                            shape = RoundedCornerShape(12.dp),
+                            Text(
-                            color = if (isUser) Color(0xFF10B981) else Color(0xFFE5E7EB),
+                                text = msg.content,
-                            contentColor = if (isUser) Color.White else Color.Black
+                                modifier = Modifier.padding(12.dp),
-                        ) {
+                                style = MaterialTheme.typography.bodyMedium
-                            if (isUser) {
+                            )
-                                Text(
+                        } else {
-                                    text = msg.content,
+                            val contentWithCursor = msg.content + if (msg.isStreaming) " █" else ""
-                                    modifier = Modifier.padding(12.dp),
+                            MarkwonRenderer(
-                                    style = MaterialTheme.typography.bodyMedium
+                                markdown = contentWithCursor,
-                                )
+                                modifier = Modifier.padding(12.dp)
-                            } else {
+                            )
-                                // 👈 直接使用行业公认、最稳定坚固、真正支持标准高精度 Markdown 排版换行与代码折叠的 Markwon 渲染器！
-                                val contentWithCursor = msg.content + if (msg.isStreaming) " █" else ""
-                                MarkwonRenderer(
-                                    markdown = contentWithCursor,
-                                    modifier = Modifier.padding(12.dp)
-                                )
-                            }
                         }
                     }
                 }
             }
         }
 
-        // 输入区
         Row(
             modifier = Modifier
                 .fillMaxWidth()
@@ -143,10 +124,9 @@ fun ChatArea(
                 modifier = Modifier.weight(1f),
                 placeholder = { Text("输入你想问的问题...") },
                 shape = RoundedCornerShape(20.dp),
-                enabled = !isAnyStreaming // streaming时禁用输入
+                enabled = !isAnyStreaming
             )
             Spacer(modifier = Modifier.width(8.dp))
-            // 👈 合并发送/停止按钮：streaming时显示停止，否则显示发送
             IconButton(
                 onClick = {
                     if (isAnyStreaming) {
@@ -171,18 +151,14 @@ fun ChatArea(
     }
 }
 
-/**
- * 基于 Markwon 引擎的 Markdown 渲染器。
- * 支持：标题、加粗、斜体、删除线、链接、代码块、表格、列表、换行。
- */
 @Composable
 fun MarkwonRenderer(markdown: String, modifier: Modifier) {
     androidx.compose.ui.viewinterop.AndroidView(
         factory = { ctx ->
-            val textView = android.widget.TextView(ctx).apply {
+            val textView = SafeSelectableTextView(ctx).apply {
                 setTextColor(android.graphics.Color.parseColor("#1F2937"))
                 textSize = 14f
-                setTextIsSelectable(true)
+                setTextIsSelectable(true) // 👈 启用选择复制功能
                 movementMethod = android.text.method.LinkMovementMethod.getInstance()
                 setLineSpacing(0f, 1.15f)
                 setPadding(0, 0, 0, 0)
@@ -214,4 +190,4 @@ fun MarkwonRenderer(markdown: String, modifier: Modifier) {
         },
         modifier = modifier
     )
-}
+}

app/src/main/java/com/stand/standapp/ui/chat/components/SafeSelectableTextView.kt

@@ -0,0 +1,25 @@
+package com.stand.standapp.ui.chat.components
+
+import android.content.Context
+import android.util.AttributeSet
+import android.widget.TextView
+
+/**
+ * 安全的可选择文本 TextView，捕获 setTextIsSelectable 导致的 IndexOutOfBoundsException 崩溃。
+ * 问题根源：当文本更新时用户正在拖动选择手柄，resetDragAcceleratorState 尝试设置无效范围 (-1, -1)。
+ */
+class SafeSelectableTextView @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null,
+    defStyleAttr: Int = 0
+) : TextView(context, attrs, defStyleAttr) {
+
+    override fun onTouchEvent(event: android.view.MotionEvent): Boolean {
+        return try {
+            super.onTouchEvent(event)
+        } catch (e: IndexOutOfBoundsException) {
+            // 吞掉异常，避免崩溃
+            true
+        }
+    }
+}

app/src/main/java/com/stand/standapp/ui/chat/repo/AiChatRepository.kt

@@ -60,18 +60,29 @@ class AiChatRepository {
                     }
 
                     // 3. 逐行读取后端流式推送字符，手动解析 data 属性
+                    // 👈 添加行缓冲，确保完整的markdown行被发送
                     BufferedReader(InputStreamReader(body.byteStream(), Charsets.UTF_8)).use { reader ->
                         var line: String?
+                        var lastcontent =  "";
                         while (reader.readLine().also { line = it } != null) {
                             val curLine = line ?: continue
                             if (curLine.startsWith("data:")) {
                                 val content = curLine.substring(5)
-                                // 👈 空data行表示换行，非空行发送内容
+                                Timber.d("内容111111111："+content)
-                                if (content.isBlank()) {
+                                if (content.contains("|") && lastcontent.contains("|")){
                                     trySend("\n")
-                                } else {
+                                    Timber.d("1发送11111111111：换行")
                                     trySend(content)
+                                    Timber.d("2发送11111111111："+content)
+                                }else if (content.length==0) {
+                                    // 空data行表示换行
+                                    trySend("\n")
+                                    Timber.d("3发送11111111111：换行")
+                                }else {
+                                    trySend(content)
+                                    Timber.d("4发送11111111111："+content)
                                 }
+                                lastcontent = content;
                             }
                         }
                     }