Update MainActivity.kt

Author: zhouzaihang

example/android/app/src/main/kotlin/xyz/zhzh/flutter_hand_tracking_plugin_example/MainActivity.kt

@@ -1,12 +1,19 @@
 package xyz.zhzh.flutter_hand_tracking_plugin_example
 
-import androidx.annotation.NonNull;
+import androidx.annotation.NonNull
+import android.util.Log // 导入 Android 日志工具
+
 import io.flutter.embedding.android.FlutterActivity
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugins.GeneratedPluginRegistrant
 
 class MainActivity: FlutterActivity() {
+    // 当 Activity 启动时，Flutter 将会配置 FlutterEngine
     override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
-        GeneratedPluginRegistrant.registerWith(flutterEngine);
+        // 使用 GeneratedPluginRegistrant 注册所有 Flutter 插件
+        GeneratedPluginRegistrant.registerWith(flutterEngine)
+
+        // 添加日志打印，以便在配置 FlutterEngine 时进行调试
+        Log.d("MainActivity", "FlutterEngine 已配置")
     }
 }