diff --git a/.DS_Store b/.DS_Store
index f475618..464ebbd 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/android/.gradle/8.5/executionHistory/executionHistory.bin b/android/.gradle/8.5/executionHistory/executionHistory.bin
index bc564d3..eca947d 100644
Binary files a/android/.gradle/8.5/executionHistory/executionHistory.bin and b/android/.gradle/8.5/executionHistory/executionHistory.bin differ
diff --git a/android/.gradle/8.5/executionHistory/executionHistory.lock b/android/.gradle/8.5/executionHistory/executionHistory.lock
index 877c539..6e8afc3 100644
Binary files a/android/.gradle/8.5/executionHistory/executionHistory.lock and b/android/.gradle/8.5/executionHistory/executionHistory.lock differ
diff --git a/android/.gradle/8.5/fileHashes/fileHashes.bin b/android/.gradle/8.5/fileHashes/fileHashes.bin
index e6d8e7b..c994434 100644
Binary files a/android/.gradle/8.5/fileHashes/fileHashes.bin and b/android/.gradle/8.5/fileHashes/fileHashes.bin differ
diff --git a/android/.gradle/8.5/fileHashes/fileHashes.lock b/android/.gradle/8.5/fileHashes/fileHashes.lock
index 9c4a4bf..b095648 100644
Binary files a/android/.gradle/8.5/fileHashes/fileHashes.lock and b/android/.gradle/8.5/fileHashes/fileHashes.lock differ
diff --git a/android/.gradle/8.5/fileHashes/resourceHashesCache.bin b/android/.gradle/8.5/fileHashes/resourceHashesCache.bin
index 1faa1d5..3dcd2c1 100644
Binary files a/android/.gradle/8.5/fileHashes/resourceHashesCache.bin and b/android/.gradle/8.5/fileHashes/resourceHashesCache.bin differ
diff --git a/android/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/android/.gradle/buildOutputCleanup/buildOutputCleanup.lock
index 7900dd5..5c67256 100644
Binary files a/android/.gradle/buildOutputCleanup/buildOutputCleanup.lock and b/android/.gradle/buildOutputCleanup/buildOutputCleanup.lock differ
diff --git a/android/.gradle/buildOutputCleanup/outputFiles.bin b/android/.gradle/buildOutputCleanup/outputFiles.bin
index ce44734..68a9e64 100644
Binary files a/android/.gradle/buildOutputCleanup/outputFiles.bin and b/android/.gradle/buildOutputCleanup/outputFiles.bin differ
diff --git a/android/.gradle/file-system.probe b/android/.gradle/file-system.probe
index 615bfff..f771f1f 100644
Binary files a/android/.gradle/file-system.probe and b/android/.gradle/file-system.probe differ
diff --git a/android/.idea/vcs.xml b/android/.idea/vcs.xml
new file mode 100644
index 0000000..6c0b863
--- /dev/null
+++ b/android/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index baf3e7d..135e176 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -33,6 +33,9 @@
         <activity
             android:name=".LoginActivity"
             android:exported="false" />
+        <activity
+            android:name=".SignupActivity"
+            android:exported="false" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/android/app/src/main/java/org/tensorflow/lite/examples/poseestimation/LoginActivity.kt b/android/app/src/main/java/org/tensorflow/lite/examples/poseestimation/LoginActivity.kt
index d1e289b..e718156 100644
--- a/android/app/src/main/java/org/tensorflow/lite/examples/poseestimation/LoginActivity.kt
+++ b/android/app/src/main/java/org/tensorflow/lite/examples/poseestimation/LoginActivity.kt
@@ -25,6 +25,7 @@ class LoginActivity : AppCompatActivity() {
         val passwordEdit = findViewById<EditText>(R.id.editPassword)
         val loginBtn = findViewById<Button>(R.id.btnLogin)
         val forgotPassword = findViewById<TextView>(R.id.forgotPassword)
+        val signupTab = findViewById<TextView>(R.id.tabSignup)
 
         // 登录按钮点击事件
         loginBtn.setOnClickListener {
@@ -33,7 +34,7 @@ class LoginActivity : AppCompatActivity() {
 
             // 表单验证
             if (email.isEmpty()) {
-                emailEdit.error = "请输入邮箱"
+                emailEdit.error = "请输入用户名"
                 return@setOnClickListener
             }
             if (password.isEmpty()) {
@@ -56,5 +57,10 @@ class LoginActivity : AppCompatActivity() {
         forgotPassword.setOnClickListener {
             Toast.makeText(this, "忘记密码功能开发中", Toast.LENGTH_SHORT).show()
         }
+
+        // Sign up Tab点击事件
+        signupTab.setOnClickListener {
+            startActivity(Intent(this, SignupActivity::class.java))
+        }
     }
 }
diff --git a/android/app/src/main/java/org/tensorflow/lite/examples/poseestimation/SignupActivity.kt b/android/app/src/main/java/org/tensorflow/lite/examples/poseestimation/SignupActivity.kt
new file mode 100644
index 0000000..6c60c2e
--- /dev/null
+++ b/android/app/src/main/java/org/tensorflow/lite/examples/poseestimation/SignupActivity.kt
@@ -0,0 +1,59 @@
+package org.tensorflow.lite.examples.poseestimation
+
+import android.os.Bundle
+import android.widget.Button
+import android.widget.EditText
+import android.widget.TextView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+
+class SignupActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_signup)
+
+        // 绑定控件
+        val usernameEdit = findViewById<EditText>(R.id.editUsername)
+        val passwordEdit = findViewById<EditText>(R.id.editPassword)
+        val passwordAgainEdit = findViewById<EditText>(R.id.editPasswordAgain)
+        val signupBtn = findViewById<Button>(R.id.btnSignup)
+        val loginTab = findViewById<TextView>(R.id.tabLogin)
+
+        // 注册按钮点击事件
+        signupBtn.setOnClickListener {
+            val username = usernameEdit.text.toString().trim()
+            val password = passwordEdit.text.toString().trim()
+            val passwordAgain = passwordAgainEdit.text.toString().trim()
+
+            // 表单验证
+            if (username.isEmpty()) {
+                usernameEdit.error = "请输入用户名"
+                return@setOnClickListener
+            }
+            if (password.isEmpty()) {
+                passwordEdit.error = "请输入密码"
+                return@setOnClickListener
+            }
+            if (passwordAgain.isEmpty()) {
+                passwordAgainEdit.error = "请确认密码"
+                return@setOnClickListener
+            }
+
+            // 验证两次密码是否一致
+            if (password != passwordAgain) {
+                passwordAgainEdit.error = "请确认密码"
+                Toast.makeText(this, "两次输入的密码不一致", Toast.LENGTH_SHORT).show()
+                return@setOnClickListener
+            }
+
+            // TODO: 这里添加实际的注册逻辑
+            Toast.makeText(this, "注册成功", Toast.LENGTH_SHORT).show()
+            finish()
+        }
+
+        // Login Tab点击事件
+        loginTab.setOnClickListener {
+            finish()
+        }
+    }
+} 
\ No newline at end of file
diff --git a/android/app/src/main/res/drawable/btn_purple_rounded.xml b/android/app/src/main/res/drawable/btn_purple_rounded.xml
index 7f5764f..d7b8663 100644
--- a/android/app/src/main/res/drawable/btn_purple_rounded.xml
+++ b/android/app/src/main/res/drawable/btn_purple_rounded.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<shape xmlns:android="http://schemas.android.com/apk/res/android">
-    <solid android:color="#BF5AF2"/>
-    <corners android:radius="28dp"/>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#BF5AF2" />
+    <corners android:radius="28dp" />
 </shape>
diff --git a/android/app/src/main/res/drawable/signup_man.png b/android/app/src/main/res/drawable/signup_man.png
new file mode 100644
index 0000000..c81d146
Binary files /dev/null and b/android/app/src/main/res/drawable/signup_man.png differ
diff --git a/android/app/src/main/res/layout/activity_login.xml b/android/app/src/main/res/layout/activity_login.xml
index 40194cb..5947d7b 100644
--- a/android/app/src/main/res/layout/activity_login.xml
+++ b/android/app/src/main/res/layout/activity_login.xml
@@ -136,7 +136,7 @@
                 android:textColor="#FFF"
                 android:textSize="18sp"
                 android:layout_marginTop="32dp"
-                android:background="@drawable/btn_purple_rounded"
+                android:backgroundTint="#BF5AF2"
                 android:stateListAnimator="@null"/>
         </LinearLayout>
     </androidx.cardview.widget.CardView>
diff --git a/android/app/src/main/res/layout/activity_signup.xml b/android/app/src/main/res/layout/activity_signup.xml
new file mode 100644
index 0000000..9b41137
--- /dev/null
+++ b/android/app/src/main/res/layout/activity_signup.xml
@@ -0,0 +1,146 @@
+<?xml version="1.0" encoding="utf-8"?>
+<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:background="#19191B">
+
+    <!-- 背景图片 -->
+    <ImageView
+        android:id="@+id/bgImage"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:scaleType="centerCrop"
+        android:src="@drawable/signup_man"
+        app:layout_constraintDimensionRatio="417:515"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintWidth_default="percent"
+        app:layout_constraintWidth_percent="1.0" />
+
+    <!-- 顶部Tab切换栏 -->
+    <LinearLayout
+        android:id="@+id/tabBar"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:paddingStart="32dp"
+        android:paddingTop="48dp"
+        android:paddingEnd="32dp"
+        android:elevation="4dp"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent">
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+            <TextView
+                android:id="@+id/tabLogin"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="Login"
+                android:textColor="#99FFFFFF"
+                android:textSize="18sp"/>
+            <View
+                android:layout_width="32dp"
+                android:layout_height="2dp"
+                android:background="@android:color/transparent"
+                android:layout_gravity="center_horizontal"/>
+        </LinearLayout>
+
+        <Space
+            android:layout_width="24dp"
+            android:layout_height="1dp"/>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+            <TextView
+                android:id="@+id/tabSignup"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="Sign up"
+                android:textColor="#FFF"
+                android:textSize="18sp"
+                android:textStyle="bold"/>
+            <View
+                android:layout_width="32dp"
+                android:layout_height="2dp"
+                android:background="#BF5AF2"
+                android:layout_gravity="center_horizontal"/>
+        </LinearLayout>
+    </LinearLayout>
+
+    <!-- 下半部分遮罩和表单 -->
+    <androidx.cardview.widget.CardView
+        android:id="@+id/formCard"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:cardCornerRadius="32dp"
+        app:cardBackgroundColor="#19191B"
+        app:layout_constraintTop_toBottomOf="@id/bgImage"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:orientation="vertical"
+            android:padding="24dp">
+
+            <!-- 用户名输入框 -->
+            <EditText
+                android:id="@+id/editUsername"
+                android:layout_width="match_parent"
+                android:layout_height="60dp"
+                android:hint="用户名"
+                android:textColor="#FFFFFF"
+                android:textColorHint="#FFFFFF"
+                android:background="@android:color/transparent"
+                android:inputType="text"
+                android:layout_marginBottom="16dp"/>
+
+            <!-- 密码输入框 -->
+            <EditText
+                android:id="@+id/editPassword"
+                android:layout_width="match_parent"
+                android:layout_height="60dp"
+                android:hint="密码"
+                android:textColor="#FFFFFF"
+                android:textColorHint="#FFFFFF"
+                android:background="@android:color/transparent"
+                android:inputType="textPassword"
+                android:layout_marginBottom="16dp"/>
+
+            <!-- 确认密码输入框 -->
+            <EditText
+                android:id="@+id/editPasswordAgain"
+                android:layout_width="match_parent"
+                android:layout_height="60dp"
+                android:hint="确认密码"
+                android:textColor="#FFFFFF"
+                android:textColorHint="#FFFFFF"
+                android:background="@android:color/transparent"
+                android:inputType="textPassword"/>
+
+            <!-- 注册按钮 -->
+            <Button
+                android:id="@+id/btnSignup"
+                android:layout_width="match_parent"
+                android:layout_height="56dp"
+                android:text="Sign up"
+                android:textColor="#FFF"
+                android:textSize="18sp"
+                android:layout_marginTop="32dp"
+                android:backgroundTint="#BF5AF2"
+                android:stateListAnimator="@null"/>
+        </LinearLayout>
+    </androidx.cardview.widget.CardView>
+</androidx.constraintlayout.widget.ConstraintLayout> 
\ No newline at end of file