Fixed using lambda

EpcQrCodeAndroidApp/src/main/java/net/codinux/banking/epcqrcode/MainActivity.kt

@@ -19,13 +19,7 @@ class MainActivity : AppCompatActivity() {
 
         setContentView(R.layout.activity_main)
 
-        findViewById<Button>(R.id.btnGenerateQrCode)?.setOnClickListener(object : View.OnClickListener { // don't know why Lambda is not working anymore
+        findViewById<Button>(R.id.btnGenerateQrCode)?.setOnClickListener { generateQrCode() }
-
-            override fun onClick(p0: View?) {
-                generateQrCode()
-            }
-
-        })
     }