diff --git a/app/src/main/cpp/main.cpp b/app/src/main/cpp/main.cpp
index e205bd6..5cbb2dd 100644
--- a/app/src/main/cpp/main.cpp
+++ b/app/src/main/cpp/main.cpp
@@ -16,6 +16,7 @@ FaceApp* g_Application = nullptr;
 AAssetManager* g_assetManager = nullptr;
 
 jobject g_callback = nullptr;
+jobject g_callbackAnimationFinished = nullptr;
 
 void handle_cmd(android_app *pApp, int32_t cmd) {
     switch (cmd) {
@@ -149,22 +150,7 @@ Java_com_hmwl_face_1sdk_FaceActivity_SetCppInitArg(JNIEnv *env, jobject thiz, js
     }
     memcpy(g_InitArgString, nativeString, len);
 }
-extern "C"
-JNIEXPORT void JNICALL
-Java_com_hmwl_face_1sdk_FaceActivity_ChangeStateCpp(JNIEnv *env, jobject thiz, jstring json) {
-    // TODO: implement ChangeStateCpp()
-    const char *nativeString = env->GetStringUTFChars(json, nullptr);
-    jsize len = env->GetStringUTFLength(json);
-    if(len > ArgLen)
-    {
-        aout << "ArgLen to long:" << len << std::endl;
-        return;
-    }
-    if(g_Application->isInited())
-    {
-        g_Application->changeMotion(nativeString);
-    }
-}
+
 extern "C"
 JNIEXPORT void JNICALL
 Java_com_hmwl_face_1sdk_FaceActivity_StopRunning(JNIEnv *env, jobject thiz) {
@@ -241,6 +227,63 @@ void CppCallback(const string& motion_type)
 }
 
 
+void CppAnimationFinishedCallback()
+{
+    JNIEnv* env = nullptr;
+    bool needDetach = false;
+
+    // 获取当前线程的 JNIEnv
+    JavaVM* vm = g_jvm; // 你需要提前保存 JavaVM* 到全局变量 g_jvm
+    int status = vm->GetEnv((void**)&env, JNI_VERSION_1_6);
+    if (status == JNI_EDETACHED) {
+        // 当前线程未 attach，需 attach
+        if (vm->AttachCurrentThread(&env, nullptr) != 0) {
+            return;
+        }
+        needDetach = true;
+    } else if (status != JNI_OK) {
+        return;
+    }
+
+    if (g_callbackAnimationFinished == nullptr) {
+        if (needDetach) vm->DetachCurrentThread();
+        return;
+    }
+
+    // 1. 获取 CallbackInterface 的 class
+    jclass callbackClass = env->GetObjectClass(g_callbackAnimationFinished);
+    if (callbackClass == nullptr) {
+        if (needDetach) vm->DetachCurrentThread();
+        return;
+    }
+
+    // 2. 获取 OnLoadActionFinished 方法 ID（注意方法名大小写必须一致！）
+    jmethodID methodId = env->GetMethodID(callbackClass, "OnAnimationFinished", "()V");
+    if (methodId == nullptr) {
+        env->ExceptionDescribe(); // 打印异常
+        env->ExceptionClear();
+        if (needDetach) vm->DetachCurrentThread();
+        return;
+    }
+
+    // 4. 调用 Java 回调
+    env->CallVoidMethod(g_callbackAnimationFinished, methodId);
+
+    // 5. 检查是否抛出异常
+    if (env->ExceptionCheck()) {
+        env->ExceptionDescribe();
+        env->ExceptionClear();
+    }
+
+    env->DeleteLocalRef(callbackClass);
+
+    // 7. 如果是临时 attach 的线程，要 detach
+    if (needDetach) {
+        vm->DetachCurrentThread();
+    }
+}
+
+
 
 extern "C"
 JNIEXPORT jstring JNICALL
@@ -268,4 +311,31 @@ Java_com_hmwl_face_1sdk_FaceActivity_PreReadAction(JNIEnv *env, jobject thiz, js
 
     std::string ret = g_Application->preReadyMotion(nativeString, CppCallback);
     return env->NewStringUTF(ret.c_str());
+}
+
+
+extern "C"
+JNIEXPORT void JNICALL
+Java_com_hmwl_face_1sdk_FaceActivity_ChangeMotionCpp(JNIEnv *env, jobject thiz, jstring json,
+                                                     jobject callback, jboolean loop) {
+    // TODO: implement ChangeMotionCpp()
+    const char *nativeString = env->GetStringUTFChars(json, nullptr);
+    jsize len = env->GetStringUTFLength(json);
+    if(len > ArgLen)
+    {
+        aout << "ArgLen to long:" << len << std::endl;
+        return;
+    }
+
+    // 保存新的回调
+    if (callback != nullptr) {
+        g_callbackAnimationFinished = env->NewGlobalRef(callback);
+    } else {
+        g_callbackAnimationFinished = nullptr;
+    }
+
+    if(g_Application->isInited())
+    {
+        g_Application->changeMotion(nativeString, CppAnimationFinishedCallback, loop);
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/hmwl/face_sdk/FaceActivity.java b/app/src/main/java/com/hmwl/face_sdk/FaceActivity.java
index 399db81..7d77f60 100644
--- a/app/src/main/java/com/hmwl/face_sdk/FaceActivity.java
+++ b/app/src/main/java/com/hmwl/face_sdk/FaceActivity.java
@@ -50,6 +50,21 @@ public class FaceActivity extends GameActivity implements FaceLandmarkerHelper.L
         }
     }
 
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+
+        if (requestCode == REQUEST_CAMERA_PERMISSION) {
+            // 检查权限是否被授予
+            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                // 用户授予了权限，启动相机
+                startCamera();
+            } else {
+                requestCameraPermission();
+            }
+        }
+    }
+
     private void startCamera() {
         ListenableFuture<ProcessCameraProvider> cameraProviderFuture =
                 ProcessCameraProvider.getInstance(this);
@@ -276,15 +291,19 @@ public class FaceActivity extends GameActivity implements FaceLandmarkerHelper.L
         void OnLoadActionFinished(String result);
     }
 
+    public interface AnimationFinishedCallbackInterface {
+        void OnAnimationFinished();
+    }
+
     protected native String PreReadAction(String motion, CallbackInterface callback);
     protected String PreLoadAction(String json, CallbackInterface callback){
         return PreReadAction(json, callback);
     }
 
-    protected native void ChangeStateCpp(String json);
-    protected void ChangeMotion(String json){
+    protected native void ChangeMotionCpp(String json, AnimationFinishedCallbackInterface callback, boolean loop);
+    protected void ChangeMotion(String json, AnimationFinishedCallbackInterface callback, boolean loop){
         Log.i("FaceActivity", "ChangeState:" + json);
-        ChangeStateCpp(json);
+        ChangeMotionCpp(json, callback, loop);
     }
 
     // 添加这个缺失的方法
diff --git a/example/src/main/java/com/inewme/uvmirror/MakeupActivity.kt b/example/src/main/java/com/inewme/uvmirror/MakeupActivity.kt
index 4ca279c..9ff3292 100644
--- a/example/src/main/java/com/inewme/uvmirror/MakeupActivity.kt
+++ b/example/src/main/java/com/inewme/uvmirror/MakeupActivity.kt
@@ -4,8 +4,11 @@ package com.inewme.uvmirror
 import android.content.Context
 import android.os.Bundle
 import android.util.Log
+import android.view.KeyEvent
+import android.view.KeyEvent.KEYCODE_BACK
 import android.view.MotionEvent
 import android.widget.Toast
+import androidx.activity.OnBackPressedCallback
 import com.hmwl.face_sdk.FaceActivity
 import com.hmwl.face_sdk.InitArg
 import com.hmwl.face_sdk.Motion
@@ -38,12 +41,31 @@ class MakeupActivity : FaceActivity()
             override fun OnLoadActionFinished(motion_type: String) {
                 //加载完成后，切断到对应的动画
                 Log.i("info","加载完成后，切换到对应的动画")
-                ChangeMotion(motion_type)
+                ChangeMotion(motion_type, object : AnimationFinishedCallbackInterface{
+                    override fun OnAnimationFinished(){
+                        Log.i("info","动画播放完成，收到回调")
+                    }
+                }, false)
             }
         })
         Toast.makeText(this, "开始加载动画:  $result", Toast.LENGTH_SHORT).show()
     }
 
+    override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
+        if (keyCode == KEYCODE_BACK) {
+            Log.d("MakeupActivity", "Back key pressed")
+            handleBackPress()
+            return true // 消费事件，防止默认行为（如直接 finish）
+        }
+        return super.onKeyDown(keyCode, event)
+    }
+
+    private fun handleBackPress() {
+        Stop()
+        finish()
+    }
+
+
     private fun getMotionByIndex(index: Int): Motion {
         pngFilesByFolder?.let { folders ->
             val motion = Motion().apply {
@@ -98,7 +120,11 @@ class MakeupActivity : FaceActivity()
                 else
                 {
                     //手动切换动画
-                    ChangeMotion(nextMotionType);
+                    ChangeMotion(nextMotionType, object: AnimationFinishedCallbackInterface{
+                        override fun OnAnimationFinished(){
+                            Log.i("info","动画播放完成的回调")
+                        }
+                    }, false);
                     nextMotionLoadFinished = false;
                     curIndex++;
                     Toast.makeText(this, "切换到下一个动画 $nextMotionType", Toast.LENGTH_SHORT).show()
diff --git a/vulkan/FaceApp.cpp b/vulkan/FaceApp.cpp
index 2a72b9c..8ec69fd 100644
--- a/vulkan/FaceApp.cpp
+++ b/vulkan/FaceApp.cpp
@@ -1322,7 +1322,19 @@ void FaceApp::drawFrame(long long frameTime)
 		_curTexIndex++;
 		if (_curTexIndex >= _curMotion_png_size)
 		{
-			_curTexIndex = 0;
+            if(_animationFinishedCallback != nullptr)
+            {
+                _animationFinishedCallback();
+            }
+
+			if (_animationLoop)
+			{
+				_curTexIndex = 0;
+			}
+			else
+			{
+				_curTexIndex = _curMotion_png_size - 1;
+			}
 		}
 		game_time = game_time - actionTime;
 	}
@@ -1357,7 +1369,7 @@ string FaceApp::preReadyMotion(const std::string& json, Callback callback)
 	return "failure";
 }
 
-void FaceApp::changeMotion(const string motion_type)
+void FaceApp::changeMotion(const string motion_type, AnimationFinishedCallback callback, bool loop)
 {
 	if (_curMotion_type == motion_type)
 	{
@@ -1387,6 +1399,8 @@ void FaceApp::changeMotion(const string motion_type)
 	_curMotion_type = motion_type;
 	_curMotion_png_size = _nextMotion.png_names.size();
     _motionState = ready;
+	_animationFinishedCallback = callback;
+	_animationLoop = loop;
 
 
 //	for (int i = 0; i < _curMotion.png_names.size(); ++i)
diff --git a/vulkan/FaceApp.h b/vulkan/FaceApp.h
index 3b5397b..ba87ceb 100644
--- a/vulkan/FaceApp.h
+++ b/vulkan/FaceApp.h
@@ -35,6 +35,7 @@ struct PushConstants {
 };
 
 using Callback = std::function<void(const std::string&)>;
+using AnimationFinishedCallback = std::function<void()>;
 
 class FaceApp :public Application
 {
@@ -139,8 +140,10 @@ private:
     
 public:
     Callback _callback;
+    AnimationFinishedCallback _animationFinishedCallback;
+    bool _animationLoop = true;
     string preReadyMotion(const std::string& json, Callback callback);
-    void changeMotion(const string motion_type);
+    void changeMotion(const string motion_type, AnimationFinishedCallback callback, bool loop);
     //void changeMotion(Motion& motion);
     InitArg _initArg;
     //Motion _curMotion;
diff --git a/vulkan/main.cpp b/vulkan/main.cpp
index 831e6dd..3deda09 100644
--- a/vulkan/main.cpp
+++ b/vulkan/main.cpp
@@ -41,11 +41,18 @@ std::wstring ReadFileWithChinesePath(const std::wstring& filePath) {
 
 FaceApp* g_app;
 
+
+void CppAnimationFinishedCallback()
+{
+    std::cout << "call CppAnimationFinishedCallback\n";
+}
+
 void CppCallback(const string& motion_type)
 {
-    g_app->changeMotion(motion_type.c_str());
+    g_app->changeMotion(motion_type.c_str(), CppAnimationFinishedCallback, true);
 }
 
+
 int main() {
 
     //std::string path = "chinese.txt";