• MissingPluginException（找不到方法的实现 *

Screenshot（调试时相同的代码工作）

class MainActivity: FlutterActivity() {
    private val channelName = "Toast" ;

    override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
        super.configureFlutterEngine(flutterEngine)

        var channel  = MethodChannel(flutterEngine.dartExecutor.binaryMessenger , channelName);

        channel.setMethodCallHandler{call , result-> if(call.method=="showToast"){
           
            Toast.makeText(this , "toast" , Toast.LENGTH_LONG).show()
        } }

    }
}

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