feat: bug fix

android/src/main/kotlin/com/example/aivoice_plugin/AivoicePlugin.kt

@@ -71,7 +71,8 @@ class AivoicePlugin: FlutterPlugin, MethodCallHandler, EventChannel.StreamHandle
         asrCenter.uninitEngineBtnClicked()
       }
       "startOrStopEngine" -> {
-        if(call.arguments == true) {
+       val isBegin =  (call.arguments as Map<*, *>).get("isBegin")
+        if(isBegin == true) {
           asrCenter.startEngineBtnClicked()
         } else {
           asrCenter.stopEngineBtnClicked()

example/lib/main.dart

@@ -147,7 +147,7 @@ class _MyAppState extends State<MyApp> {
             ],
           ),
         ),
-        floatingActionButton: ttsView,
+        floatingActionButton: asrView,
       ),
     );
   }