app/src/main/java/com/naz/sdkdemo/MainActivity.java

@@ -467,6 +467,14 @@ public class MainActivity extends BaseActivity {
                 }
             }
         }
+
+        @JavascriptInterface
+        public void disConnectPortAll() {
+            Log.e(TAG, "disConnectPortAll");
+            for (SerialPortManager port:mPortList) {
+                port.close();
+            }
+        }
     }
 
     private void toCloseCamera() {