closing port when service is destroyed

example/src/main/java/com/felhr/serialportexample/UsbService.java

@@ -155,6 +155,7 @@ public class UsbService extends Service {
     @Override
     public void onDestroy() {
         super.onDestroy();
+        serialPort.close();
         unregisterReceiver(usbReceiver);
         UsbService.SERVICE_CONNECTED = false;
     }

examplestreams/src/main/java/com/felhr/examplestreams/UsbService.java

@@ -126,6 +126,7 @@ public class UsbService extends Service {
     @Override
     public void onDestroy() {
         super.onDestroy();
+        serialPort.close();
         unregisterReceiver(usbReceiver);
         UsbService.SERVICE_CONNECTED = false;
     }

examplesync/src/main/java/com/felhr/serialportexamplesync/UsbService.java

@@ -156,6 +156,7 @@ public class UsbService extends Service {
     @Override
     public void onDestroy() {
         super.onDestroy();
+        serialPort.close();
         unregisterReceiver(usbReceiver);
         UsbService.SERVICE_CONNECTED = false;
     }