diff --git a/android-app/app/src/main/java/com/example/livestreaming/ChatAdapter.java b/android-app/app/src/main/java/com/example/livestreaming/ChatAdapter.java
index 32f59af4..0b8c9179 100644
--- a/android-app/app/src/main/java/com/example/livestreaming/ChatAdapter.java
+++ b/android-app/app/src/main/java/com/example/livestreaming/ChatAdapter.java
@@ -10,67 +10,69 @@ import androidx.recyclerview.widget.DiffUtil;
 import androidx.recyclerview.widget.ListAdapter;
 import androidx.recyclerview.widget.RecyclerView;
 
-public class ChatAdapter extends ListAdapter<ChatMessage, ChatAdapter.VH> {
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+public class ChatAdapter extends ListAdapter<ChatMessage, ChatAdapter.ChatViewHolder> {
+
+    private static final SimpleDateFormat TIME_FORMAT = new SimpleDateFormat("HH:mm", Locale.getDefault());
 
     public ChatAdapter() {
-        super(DIFF);
+        super(DIFF_CALLBACK);
     }
 
-    private static final DiffUtil.ItemCallback<ChatMessage> DIFF = new DiffUtil.ItemCallback<ChatMessage>() {
+    @NonNull
+    @Override
+    public ChatViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View view = LayoutInflater.from(parent.getContext())
+                .inflate(R.layout.item_chat_message, parent, false);
+        return new ChatViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull ChatViewHolder holder, int position) {
+        holder.bind(getItem(position));
+    }
+
+    static class ChatViewHolder extends RecyclerView.ViewHolder {
+        private final TextView usernameText;
+        private final TextView messageText;
+        private final TextView timeText;
+
+        public ChatViewHolder(@NonNull View itemView) {
+            super(itemView);
+            usernameText = itemView.findViewById(R.id.usernameText);
+            messageText = itemView.findViewById(R.id.messageText);
+            timeText = itemView.findViewById(R.id.timeText);
+        }
+
+        public void bind(ChatMessage message) {
+            if (message.isSystemMessage()) {
+                usernameText.setVisibility(View.GONE);
+                messageText.setText(message.getMessage());
+                messageText.setTextColor(itemView.getContext().getColor(R.color.purple_500));
+            } else {
+                usernameText.setVisibility(View.VISIBLE);
+                usernameText.setText(message.getUsername() + ":");
+                messageText.setText(message.getMessage());
+                messageText.setTextColor(itemView.getContext().getColor(android.R.color.black));
+            }
+            
+            timeText.setText(TIME_FORMAT.format(new Date(message.getTimestamp())));
+        }
+    }
+
+    private static final DiffUtil.ItemCallback<ChatMessage> DIFF_CALLBACK = new DiffUtil.ItemCallback<ChatMessage>() {
         @Override
         public boolean areItemsTheSame(@NonNull ChatMessage oldItem, @NonNull ChatMessage newItem) {
-            // Chat messages have no stable id; treat position as identity.
-            return oldItem == newItem;
+            // 使用时间戳作为唯一标识
+            return oldItem.getTimestamp() == newItem.getTimestamp();
         }
 
         @Override
         public boolean areContentsTheSame(@NonNull ChatMessage oldItem, @NonNull ChatMessage newItem) {
-            String ou = oldItem.getUser();
-            String nu = newItem.getUser();
-            if (ou == null ? nu != null : !ou.equals(nu)) return false;
-            String om = oldItem.getMessage();
-            String nm = newItem.getMessage();
-            if (om == null ? nm != null : !om.equals(nm)) return false;
-            return oldItem.isSystem() == newItem.isSystem();
+            return oldItem.getTimestamp() == newItem.getTimestamp();
         }
     };
-
-    @NonNull
-    @Override
-    public VH onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
-        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_chat_message, parent, false);
-        return new VH(v);
-    }
-
-    @Override
-    public void onBindViewHolder(@NonNull VH holder, int position) {
-        ChatMessage m = getItem(position);
-        if (m == null) {
-            holder.messageText.setText("");
-            return;
-        }
-
-        if (m.isSystem()) {
-            holder.messageText.setText(m.getMessage() != null ? m.getMessage() : "");
-            holder.messageText.setAlpha(0.8f);
-        } else {
-            String user = m.getUser();
-            String msg = m.getMessage();
-            if (user == null || user.trim().isEmpty()) {
-                holder.messageText.setText(msg != null ? msg : "");
-            } else {
-                holder.messageText.setText(user + ": " + (msg != null ? msg : ""));
-            }
-            holder.messageText.setAlpha(1.0f);
-        }
-    }
-
-    static class VH extends RecyclerView.ViewHolder {
-        final TextView messageText;
-
-        VH(@NonNull View itemView) {
-            super(itemView);
-            messageText = itemView.findViewById(R.id.messageText);
-        }
-    }
-}
+}
\ No newline at end of file
diff --git a/android-app/app/src/main/java/com/example/livestreaming/ChatMessage.java b/android-app/app/src/main/java/com/example/livestreaming/ChatMessage.java
index 2674a91f..5278445a 100644
--- a/android-app/app/src/main/java/com/example/livestreaming/ChatMessage.java
+++ b/android-app/app/src/main/java/com/example/livestreaming/ChatMessage.java
@@ -1,32 +1,54 @@
 package com.example.livestreaming;
 
 public class ChatMessage {
+    private String username;
+    private String message;
+    private long timestamp;
+    private boolean isSystemMessage;
 
-    private final String user;
-    private final String message;
-    private final boolean system;
-
-    public ChatMessage(String systemMessage, boolean system) {
-        this.user = null;
-        this.message = systemMessage;
-        this.system = system;
-    }
-
-    public ChatMessage(String user, String message) {
-        this.user = user;
+    public ChatMessage(String username, String message) {
+        this.username = username;
         this.message = message;
-        this.system = false;
+        this.timestamp = System.currentTimeMillis();
+        this.isSystemMessage = false;
     }
 
-    public String getUser() {
-        return user;
+    public ChatMessage(String message, boolean isSystemMessage) {
+        this.message = message;
+        this.timestamp = System.currentTimeMillis();
+        this.isSystemMessage = isSystemMessage;
+        this.username = isSystemMessage ? "系统" : "匿名用户";
+    }
+
+    public String getUsername() {
+        return username;
     }
 
     public String getMessage() {
         return message;
     }
 
-    public boolean isSystem() {
-        return system;
+    public long getTimestamp() {
+        return timestamp;
     }
-}
+
+    public boolean isSystemMessage() {
+        return isSystemMessage;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public void setTimestamp(long timestamp) {
+        this.timestamp = timestamp;
+    }
+
+    public void setSystemMessage(boolean systemMessage) {
+        isSystemMessage = systemMessage;
+    }
+}
\ No newline at end of file
diff --git a/android-app/app/src/main/res/drawable/ic_arrow_back_24.xml b/android-app/app/src/main/res/drawable/ic_arrow_back_24.xml
index c76877da..e2e8516f 100644
--- a/android-app/app/src/main/res/drawable/ic_arrow_back_24.xml
+++ b/android-app/app/src/main/res/drawable/ic_arrow_back_24.xml
@@ -1,12 +1,10 @@
-<?xml version="1.0" encoding="utf-8"?>
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
     android:viewportWidth="24"
-    android:viewportHeight="24">
-
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
     <path
-        android:fillColor="#111111"
-        android:pathData="M20,11H7.83l5.59,-5.59L12,4l-8,8l8,8l1.41,-1.41L7.83,13H20v-2z" />
-
+        android:fillColor="@android:color/white"
+        android:pathData="M20,11H7.83l5.59,-5.59L12,4l-8,8 8,8 1.41,-1.41L7.83,13H20v-2z"/>
 </vector>
diff --git a/android-app/app/src/main/res/layout/activity_room_detail_new.xml b/android-app/app/src/main/res/layout/activity_room_detail_new.xml
index 49290ac8..47f3634f 100644
--- a/android-app/app/src/main/res/layout/activity_room_detail_new.xml
+++ b/android-app/app/src/main/res/layout/activity_room_detail_new.xml
@@ -2,8 +2,280 @@
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:background="#000000"
+    android:fitsSystemWindows="true">
 
+    <!-- 顶部标题栏 -->
+    <LinearLayout
+        android:id="@+id/topBar"
+        android:layout_width="0dp"
+        android:layout_height="48dp"
+        android:background="#1A1A1A"
+        android:gravity="center_vertical"
+        android:orientation="horizontal"
+        android:paddingHorizontal="4dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <ImageButton
+            android:id="@+id/backButton"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="返回"
+            android:src="@drawable/ic_arrow_back_24"
+            app:tint="@android:color/white" />
+
+        <TextView
+            android:id="@+id/topTitle"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginHorizontal="8dp"
+            android:layout_weight="1"
+            android:ellipsize="end"
+            android:maxLines="1"
+            android:text="直播间"
+            android:textColor="@android:color/white"
+            android:textSize="16sp"
+            android:textStyle="bold" />
+
+        <!-- 直播状态标签 -->
+        <TextView
+            android:id="@+id/liveTag"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="8dp"
+            android:background="@drawable/live_badge_background"
+            android:paddingHorizontal="8dp"
+            android:paddingVertical="3dp"
+            android:text="● 直播中"
+            android:textColor="@android:color/white"
+            android:textSize="11sp"
+            android:visibility="gone" />
+
+        <!-- 观看人数 -->
+        <LinearLayout
+            android:id="@+id/topViewerLayout"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="12dp"
+            android:gravity="center_vertical"
+            android:orientation="horizontal">
+
+            <ImageView
+                android:layout_width="14dp"
+                android:layout_height="14dp"
+                android:layout_marginEnd="4dp"
+                android:src="@drawable/ic_people_24"
+                app:tint="#AAAAAA" />
+
+            <TextView
+                android:id="@+id/topViewerCount"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="0"
+                android:textColor="#AAAAAA"
+                android:textSize="12sp" />
+
+        </LinearLayout>
+
+    </LinearLayout>
+
+    <!-- 播放器容器 -->
+    <FrameLayout
+        android:id="@+id/playerContainer"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:background="#000000"
+        app:layout_constraintDimensionRatio="16:9"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/topBar">
+
+        <androidx.media3.ui.PlayerView
+            android:id="@+id/playerView"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:use_controller="true"
+            app:show_buffering="when_playing" />
+
+        <!-- 横屏按钮 -->
+        <ImageButton
+            android:id="@+id/fullscreenButton"
+            android:layout_width="44dp"
+            android:layout_height="44dp"
+            android:layout_gravity="bottom|end"
+            android:layout_margin="12dp"
+            android:background="@drawable/bg_circle_white_60"
+            android:contentDescription="全屏"
+            android:src="@drawable/ic_fullscreen_24"
+            android:tint="@android:color/white" />
+
+        <!-- 离线提示 -->
+        <LinearLayout
+            android:id="@+id/offlineLayout"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:background="#1A1A1A"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:visibility="gone">
+
+            <ImageView
+                android:layout_width="64dp"
+                android:layout_height="64dp"
+                android:layout_marginBottom="16dp"
+                android:src="@drawable/ic_voice_24"
+                android:tint="#666666" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="主播暂未开播"
+                android:textColor="#999999"
+                android:textSize="16sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:text="请稍后再试"
+                android:textColor="#666666"
+                android:textSize="14sp" />
+
+        </LinearLayout>
+
+    </FrameLayout>
+
+    <!-- 直播信息区域 -->
+    <LinearLayout
+        android:id="@+id/roomInfoLayout"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:background="@android:color/white"
+        android:gravity="center_vertical"
+        android:orientation="horizontal"
+        android:paddingHorizontal="12dp"
+        android:paddingVertical="10dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/playerContainer">
+
+        <ImageView
+            android:layout_width="36dp"
+            android:layout_height="36dp"
+            android:layout_marginEnd="10dp"
+            android:background="@drawable/bg_avatar_circle"
+            android:src="@drawable/ic_person_24"
+            android:tint="@android:color/white" />
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <TextView
+                android:id="@+id/roomTitle"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:ellipsize="end"
+                android:maxLines="1"
+                android:text="直播间标题"
+                android:textColor="#333333"
+                android:textSize="15sp"
+                android:textStyle="bold" />
+
+            <TextView
+                android:id="@+id/streamerName"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="2dp"
+                android:text="主播名称"
+                android:textColor="#999999"
+                android:textSize="12sp" />
+
+        </LinearLayout>
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/followButton"
+            style="@style/Widget.Material3.Button.TonalButton"
+            android:layout_width="wrap_content"
+            android:layout_height="32dp"
+            android:text="关注"
+            android:textSize="12sp"
+            app:icon="@drawable/ic_heart_24"
+            app:iconSize="14dp" />
+
+    </LinearLayout>
+
+    <!-- 弹幕区域 -->
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/chatLayout"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:background="@android:color/white"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/roomInfoLayout">
+
+        <!-- 弹幕列表 -->
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/chatRecyclerView"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:layout_marginBottom="8dp"
+            android:clipToPadding="false"
+            android:paddingHorizontal="16dp"
+            android:paddingTop="8dp"
+            app:layout_constraintBottom_toTopOf="@id/chatInputLayout"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <!-- 弹幕输入区域 -->
+        <LinearLayout
+            android:id="@+id/chatInputLayout"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:background="#F5F5F5"
+            android:gravity="center_vertical"
+            android:orientation="horizontal"
+            android:padding="12dp"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent">
+
+            <com.google.android.material.textfield.TextInputEditText
+                android:id="@+id/chatInput"
+                android:layout_width="0dp"
+                android:layout_height="40dp"
+                android:layout_weight="1"
+                android:background="@drawable/bg_white_16"
+                android:hint="说点什么..."
+                android:imeOptions="actionSend"
+                android:inputType="text"
+                android:maxLines="1"
+                android:paddingHorizontal="12dp"
+                android:textSize="14sp" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/sendButton"
+                android:layout_width="wrap_content"
+                android:layout_height="40dp"
+                android:layout_marginStart="8dp"
+                android:text="发送"
+                android:textSize="12sp"
+                app:backgroundTint="@color/purple_500" />
+
+        </LinearLayout>
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+    <!-- 加载指示器 -->
     <ProgressBar
         android:id="@+id/loading"
         android:layout_width="wrap_content"
@@ -14,229 +286,4 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
-    <androidx.constraintlayout.widget.ConstraintLayout
-        android:id="@+id/topBar"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:paddingHorizontal="12dp"
-        android:paddingVertical="10dp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent">
-
-        <com.google.android.material.button.MaterialButton
-            android:id="@+id/backButton"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:insetTop="0dp"
-            android:insetBottom="0dp"
-            android:minHeight="0dp"
-            android:minWidth="0dp"
-            android:text="返回"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent" />
-
-        <TextView
-            android:id="@+id/topTitle"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:ellipsize="end"
-            android:maxLines="1"
-            android:text="直播间"
-            android:textSize="16sp"
-            android:textStyle="bold"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toStartOf="@id/topRightGroup"
-            app:layout_constraintStart_toEndOf="@id/backButton"
-            app:layout_constraintTop_toTopOf="parent" />
-
-        <androidx.constraintlayout.widget.ConstraintLayout
-            android:id="@+id/topRightGroup"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintTop_toTopOf="parent">
-
-            <TextView
-                android:id="@+id/topViewerCount"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginEnd="10dp"
-                android:text="0"
-                app:layout_constraintBottom_toBottomOf="parent"
-                app:layout_constraintEnd_toStartOf="@id/fullscreenButton"
-                app:layout_constraintTop_toTopOf="parent" />
-
-            <com.google.android.material.button.MaterialButton
-                android:id="@+id/fullscreenButton"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:insetTop="0dp"
-                android:insetBottom="0dp"
-                android:minHeight="0dp"
-                android:minWidth="0dp"
-                android:text="全屏"
-                app:layout_constraintBottom_toBottomOf="parent"
-                app:layout_constraintEnd_toEndOf="parent"
-                app:layout_constraintTop_toTopOf="parent" />
-
-        </androidx.constraintlayout.widget.ConstraintLayout>
-
-    </androidx.constraintlayout.widget.ConstraintLayout>
-
-    <androidx.constraintlayout.widget.ConstraintLayout
-        android:id="@+id/playerArea"
-        android:layout_width="0dp"
-        android:layout_height="0dp"
-        app:layout_constraintDimensionRatio="16:9"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/topBar">
-
-        <androidx.media3.ui.PlayerView
-            android:id="@+id/playerView"
-            android:layout_width="0dp"
-            android:layout_height="0dp"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent" />
-
-        <LinearLayout
-            android:id="@+id/offlineLayout"
-            android:layout_width="0dp"
-            android:layout_height="0dp"
-            android:gravity="center"
-            android:orientation="vertical"
-            android:visibility="gone"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent">
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="主播暂未开播"
-                android:textColor="#666666" />
-        </LinearLayout>
-
-        <TextView
-            android:id="@+id/liveTag"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_margin="10dp"
-            android:paddingHorizontal="10dp"
-            android:paddingVertical="6dp"
-            android:text="LIVE"
-            android:textColor="@android:color/white"
-            android:visibility="gone"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent" />
-
-    </androidx.constraintlayout.widget.ConstraintLayout>
-
-    <androidx.constraintlayout.widget.ConstraintLayout
-        android:id="@+id/roomInfoLayout"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:paddingHorizontal="12dp"
-        android:paddingVertical="10dp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/playerArea">
-
-        <TextView
-            android:id="@+id/roomTitle"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:ellipsize="end"
-            android:maxLines="1"
-            android:text="直播间"
-            android:textSize="16sp"
-            android:textStyle="bold"
-            app:layout_constraintEnd_toStartOf="@id/followButton"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent" />
-
-        <TextView
-            android:id="@+id/streamerName"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_marginTop="4dp"
-            android:text="主播"
-            android:textColor="#666666"
-            app:layout_constraintEnd_toStartOf="@id/followButton"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/roomTitle" />
-
-        <com.google.android.material.button.MaterialButton
-            android:id="@+id/followButton"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:text="关注"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintTop_toTopOf="parent" />
-
-    </androidx.constraintlayout.widget.ConstraintLayout>
-
-    <androidx.constraintlayout.widget.ConstraintLayout
-        android:id="@+id/chatLayout"
-        android:layout_width="0dp"
-        android:layout_height="0dp"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/roomInfoLayout">
-
-        <androidx.recyclerview.widget.RecyclerView
-            android:id="@+id/chatRecyclerView"
-            android:layout_width="0dp"
-            android:layout_height="0dp"
-            android:overScrollMode="never"
-            android:paddingHorizontal="12dp"
-            android:paddingTop="8dp"
-            android:paddingBottom="8dp"
-            app:layout_constraintBottom_toTopOf="@id/chatInputBar"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent" />
-
-        <androidx.constraintlayout.widget.ConstraintLayout
-            android:id="@+id/chatInputBar"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:padding="10dp"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent">
-
-            <com.google.android.material.textfield.TextInputEditText
-                android:id="@+id/chatInput"
-                android:layout_width="0dp"
-                android:layout_height="wrap_content"
-                android:hint="说点什么..."
-                android:imeOptions="actionSend"
-                android:inputType="text"
-                app:layout_constraintBottom_toBottomOf="parent"
-                app:layout_constraintEnd_toStartOf="@id/sendButton"
-                app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toTopOf="parent" />
-
-            <com.google.android.material.button.MaterialButton
-                android:id="@+id/sendButton"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="发送"
-                app:layout_constraintBottom_toBottomOf="parent"
-                app:layout_constraintEnd_toEndOf="parent"
-                app:layout_constraintTop_toTopOf="parent" />
-
-        </androidx.constraintlayout.widget.ConstraintLayout>
-
-    </androidx.constraintlayout.widget.ConstraintLayout>
-
-</androidx.constraintlayout.widget.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/android-app/app/src/main/res/layout/dialog_stream_info.xml b/android-app/app/src/main/res/layout/dialog_stream_info.xml
index cdd2386b..4d6d56c5 100644
--- a/android-app/app/src/main/res/layout/dialog_stream_info.xml
+++ b/android-app/app/src/main/res/layout/dialog_stream_info.xml
@@ -1,67 +1,152 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:orientation="vertical"
     android:padding="16dp">
 
+    <!-- 说明文字 -->
     <TextView
-        android:id="@+id/addressLabel"
-        android:layout_width="0dp"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="推流地址"
-        android:textStyle="bold"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <TextView
-        android:id="@+id/addressText"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="6dp"
+        android:text="请使用 OBS 等推流软件配置以下信息："
         android:textColor="#666666"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/addressLabel" />
+        android:textSize="14sp"
+        android:layout_marginBottom="16dp" />
 
-    <com.google.android.material.button.MaterialButton
-        android:id="@+id/copyAddressBtn"
-        android:layout_width="wrap_content"
+    <!-- 推流地址 -->
+    <com.google.android.material.card.MaterialCardView
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginTop="10dp"
-        android:text="复制地址"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/addressText" />
+        android:layout_marginBottom="12dp"
+        app:cardCornerRadius="8dp"
+        app:cardElevation="2dp"
+        app:strokeColor="#E0E0E0"
+        app:strokeWidth="1dp">
 
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:padding="12dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal"
+                android:gravity="center_vertical">
+
+                <TextView
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:text="推流地址"
+                    android:textColor="#333333"
+                    android:textSize="14sp"
+                    android:textStyle="bold" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/copyAddressBtn"
+                    style="@style/Widget.Material3.Button.TextButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="32dp"
+                    android:text="复制"
+                    android:textSize="12sp"
+                    android:minWidth="60dp"
+                    app:icon="@drawable/ic_copy_24"
+                    app:iconSize="16dp" />
+
+            </LinearLayout>
+
+            <TextView
+                android:id="@+id/addressText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:background="@drawable/bg_gray_12"
+                android:padding="8dp"
+                android:text="rtmp://localhost:1935/live"
+                android:textColor="#666666"
+                android:textSize="12sp"
+                android:fontFamily="monospace"
+                android:textIsSelectable="true" />
+
+        </LinearLayout>
+
+    </com.google.android.material.card.MaterialCardView>
+
+    <!-- 推流密钥 -->
+    <com.google.android.material.card.MaterialCardView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="16dp"
+        app:cardCornerRadius="8dp"
+        app:cardElevation="2dp"
+        app:strokeColor="#E0E0E0"
+        app:strokeWidth="1dp">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:padding="12dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal"
+                android:gravity="center_vertical">
+
+                <TextView
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:text="推流密钥"
+                    android:textColor="#333333"
+                    android:textSize="14sp"
+                    android:textStyle="bold" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/copyKeyBtn"
+                    style="@style/Widget.Material3.Button.TextButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="32dp"
+                    android:text="复制"
+                    android:textSize="12sp"
+                    android:minWidth="60dp"
+                    app:icon="@drawable/ic_copy_24"
+                    app:iconSize="16dp" />
+
+            </LinearLayout>
+
+            <TextView
+                android:id="@+id/keyText"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:background="@drawable/bg_gray_12"
+                android:padding="8dp"
+                android:text="stream_key_here"
+                android:textColor="#666666"
+                android:textSize="12sp"
+                android:fontFamily="monospace"
+                android:textIsSelectable="true" />
+
+        </LinearLayout>
+
+    </com.google.android.material.card.MaterialCardView>
+
+    <!-- 提示信息 -->
     <TextView
-        android:id="@+id/keyLabel"
-        android:layout_width="0dp"
+        android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
-        android:text="推流密钥"
-        android:textStyle="bold"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/copyAddressBtn" />
-
-    <TextView
-        android:id="@+id/keyText"
-        android:layout_width="0dp"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="6dp"
+        android:text="💡 配置完成后点击「开始直播」进入直播间"
         android:textColor="#666666"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/keyLabel" />
+        android:textSize="12sp"
+        android:gravity="center"
+        android:background="@drawable/bg_purple_20"
+        android:padding="8dp"
+        android:drawablePadding="4dp" />
 
-    <com.google.android.material.button.MaterialButton
-        android:id="@+id/copyKeyBtn"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="10dp"
-        android:text="复制密钥"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/keyText" />
-
-</androidx.constraintlayout.widget.ConstraintLayout>
+</LinearLayout>
\ No newline at end of file
diff --git a/android-app/app/src/main/res/layout/item_chat_message.xml b/android-app/app/src/main/res/layout/item_chat_message.xml
index 2f072f83..712fd214 100644
--- a/android-app/app/src/main/res/layout/item_chat_message.xml
+++ b/android-app/app/src/main/res/layout/item_chat_message.xml
@@ -1,8 +1,36 @@
 <?xml version="1.0" encoding="utf-8"?>
-<TextView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/messageText"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:paddingVertical="4dp"
-    android:textColor="@android:color/white"
-    android:textSize="14sp" />
+    android:orientation="horizontal"
+    android:padding="8dp">
+
+    <TextView
+        android:id="@+id/timeText"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="8dp"
+        android:text="12:34"
+        android:textColor="#999999"
+        android:textSize="10sp" />
+
+    <TextView
+        android:id="@+id/usernameText"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="4dp"
+        android:text="用户名:"
+        android:textColor="@color/purple_500"
+        android:textSize="12sp"
+        android:textStyle="bold" />
+
+    <TextView
+        android:id="@+id/messageText"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:text="这是一条弹幕消息"
+        android:textColor="#333333"
+        android:textSize="12sp" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/java-backend/README.md b/java-backend/README.md
new file mode 100644
index 00000000..bfee9255
--- /dev/null
+++ b/java-backend/README.md
@@ -0,0 +1,126 @@
+# 直播系统 Java 后端
+
+基于 Spring Boot 3.2 + JPA + H2/MySQL 的直播系统后端服务。
+
+## 技术栈
+
+- Java 17
+- Spring Boot 3.2
+- Spring Data JPA
+- H2 Database (开发) / MySQL (生产)
+- Lombok
+
+## 快速开始
+
+### 1. 使用 IDEA 打开项目
+
+1. 打开 IntelliJ IDEA
+2. 选择 `File` -> `Open`
+3. 选择 `java-backend` 文件夹
+4. 等待 Maven 依赖下载完成
+
+### 2. 运行项目
+
+方式一：直接运行
+- 找到 `LivestreamingApplication.java`
+- 右键点击 -> `Run 'LivestreamingApplication'`
+
+方式二：Maven 命令
+```bash
+cd java-backend
+mvn spring-boot:run
+```
+
+### 3. 访问服务
+
+- API 地址: http://localhost:3001/api
+- H2 控制台: http://localhost:3001/h2-console
+  - JDBC URL: `jdbc:h2:file:./data/livestream`
+  - 用户名: `sa`
+  - 密码: (空)
+
+## API 接口
+
+### 直播间接口
+
+| 方法 | 路径 | 说明 |
+|------|------|------|
+| GET | /api/rooms | 获取所有直播间 |
+| GET | /api/rooms/{id} | 获取单个直播间 |
+| POST | /api/rooms | 创建直播间 |
+| DELETE | /api/rooms/{id} | 删除直播间 |
+
+### 创建直播间请求示例
+
+```json
+POST /api/rooms
+{
+  "title": "我的直播间",
+  "streamerName": "主播名称"
+}
+```
+
+### 响应示例
+
+```json
+{
+  "success": true,
+  "data": {
+    "id": "uuid",
+    "title": "我的直播间",
+    "streamerName": "主播名称",
+    "streamKey": "uuid",
+    "isLive": false,
+    "viewerCount": 0,
+    "streamUrls": {
+      "rtmp": "rtmp://localhost:1935/live/uuid",
+      "flv": "http://localhost:8080/live/uuid.flv",
+      "hls": "http://localhost:8080/live/uuid/index.m3u8"
+    }
+  }
+}
+```
+
+## 切换到 MySQL
+
+1. 安装 MySQL 并创建数据库：
+```sql
+CREATE DATABASE livestream CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+```
+
+2. 修改 `application.yml`：
+```yaml
+spring:
+  datasource:
+    url: jdbc:mysql://localhost:3306/livestream?useSSL=false&serverTimezone=Asia/Shanghai
+    driver-class-name: com.mysql.cj.jdbc.Driver
+    username: root
+    password: your_password
+```
+
+## 项目结构
+
+```
+java-backend/
+├── src/main/java/com/example/livestreaming/
+│   ├── LivestreamingApplication.java  # 启动类
+│   ├── config/                        # 配置类
+│   ├── controller/                    # 控制器
+│   ├── dto/                           # 数据传输对象
+│   ├── entity/                        # 实体类
+│   ├── exception/                     # 异常处理
+│   ├── repository/                    # 数据访问层
+│   └── service/                       # 业务逻辑层
+├── src/main/resources/
+│   └── application.yml                # 配置文件
+└── pom.xml                            # Maven 配置
+```
+
+## Android App 配置
+
+确保 Android App 的 API 地址指向此服务：
+
+```kotlin
+// build.gradle.kts
+buildConfigField("String", "API_BASE_URL_DEVICE", "\"http://你的电脑IP:3001/api/\"")
+```
diff --git a/java-backend/data/livestream.mv.db b/java-backend/data/livestream.mv.db
new file mode 100644
index 00000000..1473e2fc
Binary files /dev/null and b/java-backend/data/livestream.mv.db differ
diff --git a/java-backend/pom.xml b/java-backend/pom.xml
new file mode 100644
index 00000000..c88f930c
--- /dev/null
+++ b/java-backend/pom.xml
@@ -0,0 +1,88 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.2.0</version>
+        <relativePath/>
+    </parent>
+    
+    <groupId>com.example</groupId>
+    <artifactId>livestreaming-backend</artifactId>
+    <version>1.0.0</version>
+    <name>livestreaming-backend</name>
+    <description>直播系统后端服务</description>
+    
+    <properties>
+        <java.version>17</java.version>
+    </properties>
+    
+    <dependencies>
+        <!-- Spring Boot Web -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        
+        <!-- Spring Data JPA -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+        
+        <!-- MySQL Driver -->
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+        
+        <!-- H2 Database (开发测试用，可选) -->
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+        
+        <!-- Lombok -->
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+        
+        <!-- Validation -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+        
+        <!-- Test -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <exclude>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                        </exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>
diff --git a/java-backend/src/main/java/com/example/livestreaming/LivestreamingApplication.java b/java-backend/src/main/java/com/example/livestreaming/LivestreamingApplication.java
new file mode 100644
index 00000000..a43a87e4
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/LivestreamingApplication.java
@@ -0,0 +1,17 @@
+package com.example.livestreaming;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class LivestreamingApplication {
+    
+    public static void main(String[] args) {
+        SpringApplication.run(LivestreamingApplication.class, args);
+        System.out.println("========================================");
+        System.out.println("  直播系统后端服务启动成功！");
+        System.out.println("  API地址: http://localhost:3001/api");
+        System.out.println("  H2控制台: http://localhost:3001/h2-console");
+        System.out.println("========================================");
+    }
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/config/WebConfig.java b/java-backend/src/main/java/com/example/livestreaming/config/WebConfig.java
new file mode 100644
index 00000000..f61c87e5
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/config/WebConfig.java
@@ -0,0 +1,18 @@
+package com.example.livestreaming.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+public class WebConfig implements WebMvcConfigurer {
+    
+    @Override
+    public void addCorsMappings(CorsRegistry registry) {
+        registry.addMapping("/**")
+                .allowedOrigins("*")
+                .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS")
+                .allowedHeaders("*")
+                .maxAge(3600);
+    }
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/controller/HealthController.java b/java-backend/src/main/java/com/example/livestreaming/controller/HealthController.java
new file mode 100644
index 00000000..af0d0c58
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/controller/HealthController.java
@@ -0,0 +1,20 @@
+package com.example.livestreaming.controller;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.time.LocalDateTime;
+import java.util.Map;
+
+@RestController
+public class HealthController {
+    
+    @GetMapping("/health")
+    public ResponseEntity<Map<String, Object>> health() {
+        return ResponseEntity.ok(Map.of(
+            "status", "ok",
+            "timestamp", LocalDateTime.now().toString()
+        ));
+    }
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/controller/RoomController.java b/java-backend/src/main/java/com/example/livestreaming/controller/RoomController.java
new file mode 100644
index 00000000..b0f9d4ed
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/controller/RoomController.java
@@ -0,0 +1,64 @@
+package com.example.livestreaming.controller;
+
+import com.example.livestreaming.dto.ApiResponse;
+import com.example.livestreaming.dto.CreateRoomRequest;
+import com.example.livestreaming.dto.RoomResponse;
+import com.example.livestreaming.service.RoomService;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/rooms")
+@RequiredArgsConstructor
+@CrossOrigin(origins = "*")
+public class RoomController {
+    
+    private final RoomService roomService;
+    
+    /**
+     * 获取所有直播间
+     * GET /api/rooms
+     */
+    @GetMapping
+    public ResponseEntity<ApiResponse<List<RoomResponse>>> getAllRooms() {
+        List<RoomResponse> rooms = roomService.getAllRooms();
+        return ResponseEntity.ok(ApiResponse.success(rooms));
+    }
+    
+    /**
+     * 获取单个直播间
+     * GET /api/rooms/{id}
+     */
+    @GetMapping("/{id}")
+    public ResponseEntity<ApiResponse<RoomResponse>> getRoomById(@PathVariable String id) {
+        return roomService.getRoomById(id)
+                .map(room -> ResponseEntity.ok(ApiResponse.success(room)))
+                .orElse(ResponseEntity.notFound().build());
+    }
+    
+    /**
+     * 创建直播间
+     * POST /api/rooms
+     */
+    @PostMapping
+    public ResponseEntity<ApiResponse<RoomResponse>> createRoom(@Valid @RequestBody CreateRoomRequest request) {
+        RoomResponse room = roomService.createRoom(request);
+        return ResponseEntity.ok(ApiResponse.success(room, "直播间创建成功"));
+    }
+    
+    /**
+     * 删除直播间
+     * DELETE /api/rooms/{id}
+     */
+    @DeleteMapping("/{id}")
+    public ResponseEntity<ApiResponse<Void>> deleteRoom(@PathVariable String id) {
+        if (roomService.deleteRoom(id)) {
+            return ResponseEntity.ok(ApiResponse.success(null, "删除成功"));
+        }
+        return ResponseEntity.notFound().build();
+    }
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/controller/SrsCallbackController.java b/java-backend/src/main/java/com/example/livestreaming/controller/SrsCallbackController.java
new file mode 100644
index 00000000..0ad76528
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/controller/SrsCallbackController.java
@@ -0,0 +1,84 @@
+package com.example.livestreaming.controller;
+
+import com.example.livestreaming.service.RoomService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * SRS/NodeMediaServer 回调接口
+ * 用于接收推流开始/结束的通知
+ */
+@Slf4j
+@RestController
+@RequestMapping("/api/srs")
+@RequiredArgsConstructor
+@CrossOrigin(origins = "*")
+public class SrsCallbackController {
+    
+    private final RoomService roomService;
+    
+    /**
+     * 推流开始回调
+     * POST /api/srs/on_publish
+     */
+    @PostMapping("/on_publish")
+    public ResponseEntity<Map<String, Object>> onPublish(@RequestBody Map<String, Object> body) {
+        String stream = (String) body.get("stream");
+        log.info("推流开始: stream={}", stream);
+        
+        if (stream != null) {
+            roomService.setLiveStatus(stream, true);
+        }
+        
+        return ResponseEntity.ok(successResponse());
+    }
+    
+    /**
+     * 推流结束回调
+     * POST /api/srs/on_unpublish
+     */
+    @PostMapping("/on_unpublish")
+    public ResponseEntity<Map<String, Object>> onUnpublish(@RequestBody Map<String, Object> body) {
+        String stream = (String) body.get("stream");
+        log.info("推流结束: stream={}", stream);
+        
+        if (stream != null) {
+            roomService.setLiveStatus(stream, false);
+        }
+        
+        return ResponseEntity.ok(successResponse());
+    }
+    
+    /**
+     * 播放开始回调
+     * POST /api/srs/on_play
+     */
+    @PostMapping("/on_play")
+    public ResponseEntity<Map<String, Object>> onPlay(@RequestBody Map<String, Object> body) {
+        String stream = (String) body.get("stream");
+        log.info("观众进入: stream={}", stream);
+        return ResponseEntity.ok(successResponse());
+    }
+    
+    /**
+     * 播放结束回调
+     * POST /api/srs/on_stop
+     */
+    @PostMapping("/on_stop")
+    public ResponseEntity<Map<String, Object>> onStop(@RequestBody Map<String, Object> body) {
+        String stream = (String) body.get("stream");
+        log.info("观众离开: stream={}", stream);
+        return ResponseEntity.ok(successResponse());
+    }
+    
+    private Map<String, Object> successResponse() {
+        Map<String, Object> result = new HashMap<>();
+        result.put("code", 0);
+        return result;
+    }
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/dto/ApiResponse.java b/java-backend/src/main/java/com/example/livestreaming/dto/ApiResponse.java
new file mode 100644
index 00000000..380968de
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/dto/ApiResponse.java
@@ -0,0 +1,27 @@
+package com.example.livestreaming.dto;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.AllArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class ApiResponse<T> {
+    
+    private boolean success;
+    private T data;
+    private String message;
+    
+    public static <T> ApiResponse<T> success(T data) {
+        return new ApiResponse<>(true, data, null);
+    }
+    
+    public static <T> ApiResponse<T> success(T data, String message) {
+        return new ApiResponse<>(true, data, message);
+    }
+    
+    public static <T> ApiResponse<T> error(String message) {
+        return new ApiResponse<>(false, null, message);
+    }
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/dto/CreateRoomRequest.java b/java-backend/src/main/java/com/example/livestreaming/dto/CreateRoomRequest.java
new file mode 100644
index 00000000..a4963b80
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/dto/CreateRoomRequest.java
@@ -0,0 +1,14 @@
+package com.example.livestreaming.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import lombok.Data;
+
+@Data
+public class CreateRoomRequest {
+    
+    @NotBlank(message = "标题不能为空")
+    private String title;
+    
+    @NotBlank(message = "主播名称不能为空")
+    private String streamerName;
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/dto/RoomResponse.java b/java-backend/src/main/java/com/example/livestreaming/dto/RoomResponse.java
new file mode 100644
index 00000000..0aff8ad3
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/dto/RoomResponse.java
@@ -0,0 +1,47 @@
+package com.example.livestreaming.dto;
+
+import com.example.livestreaming.entity.Room;
+import lombok.Data;
+
+@Data
+public class RoomResponse {
+    
+    private String id;
+    private String title;
+    private String streamerName;
+    private String streamKey;
+    private boolean isLive;
+    private int viewerCount;
+    private String createdAt;
+    private String startedAt;
+    private StreamUrls streamUrls;
+    
+    @Data
+    public static class StreamUrls {
+        private String rtmp;
+        private String flv;
+        private String hls;
+    }
+    
+    public static RoomResponse fromEntity(Room room, String rtmpHost, int rtmpPort, String httpHost, int httpPort) {
+        RoomResponse response = new RoomResponse();
+        response.setId(room.getId());
+        response.setTitle(room.getTitle());
+        response.setStreamerName(room.getStreamerName());
+        response.setStreamKey(room.getStreamKey());
+        response.setLive(room.isLive());
+        response.setViewerCount(room.getViewerCount());
+        response.setCreatedAt(room.getCreatedAt() != null ? room.getCreatedAt().toString() : null);
+        response.setStartedAt(room.getStartedAt() != null ? room.getStartedAt().toString() : null);
+        
+        // 构建流地址
+        StreamUrls urls = new StreamUrls();
+        String streamKey = room.getStreamKey();
+        urls.setRtmp(String.format("rtmp://%s:%d/live/%s", rtmpHost, rtmpPort, streamKey));
+        urls.setFlv(String.format("http://%s:%d/live/%s.flv", httpHost, httpPort, streamKey));
+        urls.setHls(String.format("http://%s:%d/live/%s/index.m3u8", httpHost, httpPort, streamKey));
+        response.setStreamUrls(urls);
+        
+        return response;
+    }
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/entity/Room.java b/java-backend/src/main/java/com/example/livestreaming/entity/Room.java
new file mode 100644
index 00000000..9a328f00
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/entity/Room.java
@@ -0,0 +1,53 @@
+package com.example.livestreaming.entity;
+
+import jakarta.persistence.*;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.AllArgsConstructor;
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@Entity
+@Table(name = "rooms")
+public class Room {
+    
+    @Id
+    private String id;
+    
+    @Column(nullable = false)
+    private String title;
+    
+    @Column(name = "streamer_name", nullable = false)
+    private String streamerName;
+    
+    @Column(name = "stream_key", unique = true, nullable = false)
+    private String streamKey;
+    
+    @Column(name = "is_live")
+    private boolean isLive = false;
+    
+    @Column(name = "viewer_count")
+    private int viewerCount = 0;
+    
+    @Column(name = "created_at")
+    private LocalDateTime createdAt;
+    
+    @Column(name = "started_at")
+    private LocalDateTime startedAt;
+    
+    @PrePersist
+    public void prePersist() {
+        if (id == null) {
+            id = UUID.randomUUID().toString();
+        }
+        if (streamKey == null) {
+            streamKey = id;
+        }
+        if (createdAt == null) {
+            createdAt = LocalDateTime.now();
+        }
+    }
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/exception/GlobalExceptionHandler.java b/java-backend/src/main/java/com/example/livestreaming/exception/GlobalExceptionHandler.java
new file mode 100644
index 00000000..c5579c19
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/exception/GlobalExceptionHandler.java
@@ -0,0 +1,32 @@
+package com.example.livestreaming.exception;
+
+import com.example.livestreaming.dto.ApiResponse;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+import java.util.stream.Collectors;
+
+@Slf4j
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+    
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<ApiResponse<Void>> handleValidationException(MethodArgumentNotValidException ex) {
+        String message = ex.getBindingResult().getFieldErrors().stream()
+                .map(FieldError::getDefaultMessage)
+                .collect(Collectors.joining(", "));
+        return ResponseEntity.badRequest().body(ApiResponse.error(message));
+    }
+    
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<ApiResponse<Void>> handleException(Exception ex) {
+        log.error("服务器错误", ex);
+        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+                .body(ApiResponse.error("服务器内部错误"));
+    }
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/repository/RoomRepository.java b/java-backend/src/main/java/com/example/livestreaming/repository/RoomRepository.java
new file mode 100644
index 00000000..50791f55
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/repository/RoomRepository.java
@@ -0,0 +1,13 @@
+package com.example.livestreaming.repository;
+
+import com.example.livestreaming.entity.Room;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.Optional;
+
+@Repository
+public interface RoomRepository extends JpaRepository<Room, String> {
+    
+    Optional<Room> findByStreamKey(String streamKey);
+}
diff --git a/java-backend/src/main/java/com/example/livestreaming/service/RoomService.java b/java-backend/src/main/java/com/example/livestreaming/service/RoomService.java
new file mode 100644
index 00000000..5a371881
--- /dev/null
+++ b/java-backend/src/main/java/com/example/livestreaming/service/RoomService.java
@@ -0,0 +1,89 @@
+package com.example.livestreaming.service;
+
+import com.example.livestreaming.dto.CreateRoomRequest;
+import com.example.livestreaming.dto.RoomResponse;
+import com.example.livestreaming.entity.Room;
+import com.example.livestreaming.repository.RoomRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+@Service
+@RequiredArgsConstructor
+public class RoomService {
+    
+    private final RoomRepository roomRepository;
+    
+    @Value("${livestream.rtmp.host:localhost}")
+    private String rtmpHost;
+    
+    @Value("${livestream.rtmp.port:1935}")
+    private int rtmpPort;
+    
+    @Value("${livestream.http.host:localhost}")
+    private String httpHost;
+    
+    @Value("${livestream.http.port:8080}")
+    private int httpPort;
+    
+    /**
+     * 获取所有直播间
+     */
+    public List<RoomResponse> getAllRooms() {
+        return roomRepository.findAll().stream()
+                .map(room -> RoomResponse.fromEntity(room, rtmpHost, rtmpPort, httpHost, httpPort))
+                .collect(Collectors.toList());
+    }
+    
+    /**
+     * 根据ID获取直播间
+     */
+    public Optional<RoomResponse> getRoomById(String id) {
+        return roomRepository.findById(id)
+                .map(room -> RoomResponse.fromEntity(room, rtmpHost, rtmpPort, httpHost, httpPort));
+    }
+    
+    /**
+     * 创建直播间
+     */
+    @Transactional
+    public RoomResponse createRoom(CreateRoomRequest request) {
+        Room room = new Room();
+        room.setTitle(request.getTitle());
+        room.setStreamerName(request.getStreamerName());
+        
+        Room saved = roomRepository.save(room);
+        return RoomResponse.fromEntity(saved, rtmpHost, rtmpPort, httpHost, httpPort);
+    }
+    
+    /**
+     * 更新直播状态（供SRS回调使用）
+     */
+    @Transactional
+    public Optional<Room> setLiveStatus(String streamKey, boolean isLive) {
+        return roomRepository.findByStreamKey(streamKey)
+                .map(room -> {
+                    room.setLive(isLive);
+                    room.setStartedAt(isLive ? LocalDateTime.now() : null);
+                    return roomRepository.save(room);
+                });
+    }
+    
+    /**
+     * 删除直播间
+     */
+    @Transactional
+    public boolean deleteRoom(String id) {
+        if (roomRepository.existsById(id)) {
+            roomRepository.deleteById(id);
+            return true;
+        }
+        return false;
+    }
+}
diff --git a/java-backend/src/main/resources/application.yml b/java-backend/src/main/resources/application.yml
new file mode 100644
index 00000000..97b87083
--- /dev/null
+++ b/java-backend/src/main/resources/application.yml
@@ -0,0 +1,50 @@
+server:
+  port: 3001
+
+spring:
+  application:
+    name: livestreaming-backend
+  
+  # 数据库配置 - 默认使用H2内存数据库（开发测试）
+  # 如需使用MySQL，请取消下方注释并配置
+  datasource:
+    # H2 内存数据库（开发测试用，无需安装）
+    url: jdbc:h2:file:./data/livestream;AUTO_SERVER=TRUE
+    driver-class-name: org.h2.Driver
+    username: sa
+    password: 
+    
+    # MySQL 配置（生产环境使用）
+    # url: jdbc:mysql://localhost:3306/livestream?useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true
+    # driver-class-name: com.mysql.cj.jdbc.Driver
+    # username: root
+    # password: your_password
+  
+  jpa:
+    hibernate:
+      ddl-auto: update
+    show-sql: true
+    properties:
+      hibernate:
+        format_sql: true
+  
+  # H2 控制台（开发时可访问 http://localhost:3001/h2-console）
+  h2:
+    console:
+      enabled: true
+      path: /h2-console
+
+# 直播服务配置
+livestream:
+  rtmp:
+    host: localhost
+    port: 1935
+  http:
+    host: localhost
+    port: 8080
+
+# 日志配置
+logging:
+  level:
+    com.example.livestreaming: DEBUG
+    org.hibernate.SQL: DEBUG
diff --git a/java-backend/target/classes/application.yml b/java-backend/target/classes/application.yml
new file mode 100644
index 00000000..97b87083
--- /dev/null
+++ b/java-backend/target/classes/application.yml
@@ -0,0 +1,50 @@
+server:
+  port: 3001
+
+spring:
+  application:
+    name: livestreaming-backend
+  
+  # 数据库配置 - 默认使用H2内存数据库（开发测试）
+  # 如需使用MySQL，请取消下方注释并配置
+  datasource:
+    # H2 内存数据库（开发测试用，无需安装）
+    url: jdbc:h2:file:./data/livestream;AUTO_SERVER=TRUE
+    driver-class-name: org.h2.Driver
+    username: sa
+    password: 
+    
+    # MySQL 配置（生产环境使用）
+    # url: jdbc:mysql://localhost:3306/livestream?useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true
+    # driver-class-name: com.mysql.cj.jdbc.Driver
+    # username: root
+    # password: your_password
+  
+  jpa:
+    hibernate:
+      ddl-auto: update
+    show-sql: true
+    properties:
+      hibernate:
+        format_sql: true
+  
+  # H2 控制台（开发时可访问 http://localhost:3001/h2-console）
+  h2:
+    console:
+      enabled: true
+      path: /h2-console
+
+# 直播服务配置
+livestream:
+  rtmp:
+    host: localhost
+    port: 1935
+  http:
+    host: localhost
+    port: 8080
+
+# 日志配置
+logging:
+  level:
+    com.example.livestreaming: DEBUG
+    org.hibernate.SQL: DEBUG
diff --git a/java-backend/target/classes/com/example/livestreaming/LivestreamingApplication.class b/java-backend/target/classes/com/example/livestreaming/LivestreamingApplication.class
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diff --git a/java-backend/target/classes/com/example/livestreaming/dto/RoomResponse$StreamUrls.class b/java-backend/target/classes/com/example/livestreaming/dto/RoomResponse$StreamUrls.class
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diff --git a/java-backend/target/classes/com/example/livestreaming/service/RoomService.class b/java-backend/target/classes/com/example/livestreaming/service/RoomService.class
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diff --git a/live-streaming/docker/srs/srs-emulator.conf b/live-streaming/docker/srs/srs-emulator.conf
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--- /dev/null
+++ b/live-streaming/docker/srs/srs-emulator.conf
@@ -0,0 +1,92 @@
+listen              1935;
+max_connections     1000;
+daemon              off;
+srs_log_tank        console;
+
+# 模拟器专用优化配置
+# 减少内存使用
+mr_enabled          off;
+# 启用快速启动
+fast_cache          5;
+# 优化TCP配置
+tcp_nodelay         on;
+# 减少线程数
+work_threads        1;
+
+http_server {
+    enabled         on;
+    listen          8080;
+    dir             ./objs/nginx/html;
+    # 启用跨域支持
+    crossdomain     on;
+}
+
+http_api {
+    enabled         on;
+    listen          1985;
+    # 启用跨域支持
+    crossdomain     on;
+}
+
+stats {
+    network         0;
+}
+
+vhost __defaultVhost__ {
+    # RTMP 配置 - 模拟器优化
+    rtmp {
+        enabled     on;
+        # 减少缓冲区大小，降低延迟
+        chunk_size  2048;
+    }
+    
+    # HLS 配置 - 极低延迟模式
+    hls {
+        enabled         on;
+        hls_path        ./objs/nginx/html;
+        # 极短分片时长，适合模拟器测试
+        hls_fragment    1;
+        hls_window      3;
+        # 启用低延迟模式
+        hls_dispose     10;
+    }
+    
+    # HTTP-FLV 配置 - 模拟器优化
+    http_remux {
+        enabled     on;
+        mount       [vhost]/[app]/[stream].flv;
+        # 启用快速启动
+        fast_cache  5;
+    }
+    
+    # 转码配置（关闭以节省资源）
+    transcode {
+        enabled     off;
+    }
+    
+    # 播放配置 - 模拟器优化
+    play {
+        # 关闭GOP缓存
+        gop_cache       off;
+        # 启用时间校正
+        time_jitter     full;
+        # 减少队列长度
+        queue_length    5;
+        # 减少缓冲区
+        send_min_interval   10;
+    }
+    
+    # 发布配置 - 模拟器优化  
+    publish {
+        # 减少首帧等待时间
+        firstpkt_timeout    10000;
+        # 减少正常包超时
+        normal_timeout      3000;
+    }
+    
+    # 模拟器专用配置
+    # 减少内存占用
+    chunk_size          2048;
+    # 快速丢弃过期数据
+    queue_length        5;
+}
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diff --git a/模拟器优化指南.md b/模拟器优化指南.md
new file mode 100644
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--- /dev/null
+++ b/模拟器优化指南.md
@@ -0,0 +1,89 @@
+# 模拟器环境优化指南
+
+## 🚀 已完成的优化
+
+### 1. 应用层优化
+- ✅ 异步加载资源，避免主线程阻塞
+- ✅ 减少网络请求频率（15秒轮询）
+- ✅ 优化启动流程，立即显示内容
+- ✅ 添加ANR防护机制
+
+### 2. 网络层优化
+- ✅ 模拟器专用超时配置（3秒连接，8秒读取）
+- ✅ 启用连接重试机制
+- ✅ 优化HTTP客户端配置
+
+### 3. 流媒体服务器优化
+- ✅ 使用模拟器专用SRS配置
+- ✅ HLS分片时长降至1秒（极低延迟）
+- ✅ 减少缓冲区大小
+- ✅ 关闭GOP缓存
+
+## 📱 模拟器设置建议
+
+### Android Studio模拟器优化
+1. **硬件配置**
+   - RAM: 至少4GB
+   - VM heap: 512MB
+   - Graphics: Hardware - GLES 2.0
+
+2. **高级设置**
+   - 启用 "Use Host GPU"
+   - 启用 "Snapshot" 快速启动
+   - 关闭不必要的传感器
+
+### 推流设置（OBS）
+```
+服务器: rtmp://localhost:1935/live
+密钥: 从应用获取的streamKey
+```
+
+**OBS优化设置：**
+- 关键帧间隔: 1秒
+- 码率: 1000-2000 kbps（模拟器环境建议较低）
+- 分辨率: 720p或更低
+- 编码器: x264（软编码，兼容性更好）
+
+## ⚡ 延迟优化效果
+
+| 配置项 | 优化前 | 优化后 |
+|--------|--------|--------|
+| HLS分片 | 10秒 | 1秒 |
+| 缓冲时长 | 30秒 | 3秒 |
+| 预期延迟 | 15-20秒 | 3-8秒 |
+
+## 🔧 故障排除
+
+### 如果仍然出现ANR
+1. 重启模拟器
+2. 清除应用数据
+3. 检查电脑性能（CPU/内存使用率）
+
+### 如果延迟仍然很高
+1. 确认使用HTTP-FLV播放（延迟更低）
+2. 检查网络连接
+3. 尝试降低推流码率
+
+### 切换回生产配置
+如需在真机上测试，修改docker-compose.yml：
+```yaml
+volumes:
+  - ./docker/srs/srs.conf:/usr/local/srs/conf/srs.conf
+```
+
+## 📊 性能监控
+
+可以通过以下方式监控性能：
+- SRS统计页面: http://localhost:8080/console/
+- Android Studio Profiler
+- 应用内的网络请求日志
+
+## 💡 最佳实践
+
+1. **开发阶段**: 使用模拟器配置，快速测试
+2. **测试阶段**: 切换到真机，验证实际性能
+3. **生产环境**: 使用标准配置，确保稳定性
+
+---
+
+*注意：模拟器环境的延迟主要来自虚拟化开销，真机环境下延迟会显著降低。*
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