update MainActivity.kt

Author: FlavioAro

AndroidApp/app/src/main/java/com/example/androidapp/MainActivity.kt

@@ -8,20 +8,23 @@ import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.embedding.engine.FlutterEngineCache
 import io.flutter.embedding.engine.dart.DartExecutor
 
-private const val FLUTTER_ENGINE_ID = "flutter_engine"
+private const val FLUTTER_ENGINE_ID = "module_flutter_engine"
 
 class MainActivity : AppCompatActivity() {
     lateinit var flutterEngine : FlutterEngine
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
+        // Instantiate a FlutterEngine
         flutterEngine = FlutterEngine(this)
 
+        // Start executing Dart code to pre-warm the FlutterEngine
         flutterEngine.dartExecutor.executeDartEntrypoint(
             DartExecutor.DartEntrypoint.createDefault()
         )
 
+        // Cache the FlutterEngine to be used by FlutterActivity
         FlutterEngineCache
             .getInstance()
             .put(FLUTTER_ENGINE_ID, flutterEngine)